From: mchristi@redhat.com <mchristi@redhat.com>
Date: Wed, 22 Apr 2009 02:10:19 -0500
Subject: [scsi] update libfc/fcoe for RHEL-5.4
Message-id: 1240384221-15379-1-git-send-email-mchristi@redhat.com
O-Subject: [PATCH 1/3] RHEL 5.4: update libfc/fcoe
Bugzilla: 484438
RH-Acked-by: David Miller <davem@redhat.com>
From: Mike Christie <mchristi@redhat.com>
This is for BZ 484438.
This part of the patchset updates libfc and fcoe. It syncs us with
the libfc/fcoe code in the scsi maintainer's tree
(last commit)
[SCSI] fcoe, libfcoe: Add support for FIP. FCoE discovery and
keep-alive.
97c8389d54b9665c38105ea72a428a44b97ff2f6
It also add some patches that were just sent to the lists:
http://marc.info/?l=linux-scsi&m=123879588506805&w=2
The scsi maintainer did not like the original patchset,
so I have taken the rebuilt patches in the fcoe maintainer's
tree that he is going to resend according to the scsi maintianer's
comments.
This also fixes a bug I found last night while testing:
http://www.open-fcoe.org/pipermail/devel/2009-April/002273.html
and partially reverts a patch that was causing a throughput regession:
http://www.open-fcoe.org/pipermail/devel/2009-April/002184.html
I have tested this here by doing disktest and bonnie++ while
disabling and enabling ports and pulling cables.
diff --git a/drivers/scsi/Kconfig b/drivers/scsi/Kconfig
index 38abac7..de3be26 100644
--- a/drivers/scsi/Kconfig
+++ b/drivers/scsi/Kconfig
@@ -266,10 +266,17 @@ config LIBFC
---help---
Fibre Channel library module
+config LIBFCOE
+ tristate "LibFCoE module"
+ select LIBFC
+ ---help---
+ Library for Fibre Channel over Ethernet module
+
config FCOE
tristate "FCoE module"
depends on SCSI && SCSI_FC_ATTRS
select LIBFC
+ select LIBFCOE
---help---
Fibre Channel over Ethernet module
diff --git a/drivers/scsi/fcoe/Makefile b/drivers/scsi/fcoe/Makefile
index b78da06..950f276 100644
--- a/drivers/scsi/fcoe/Makefile
+++ b/drivers/scsi/fcoe/Makefile
@@ -1,8 +1,2 @@
-# $Id: Makefile
-
obj-$(CONFIG_FCOE) += fcoe.o
-
-fcoe-y := \
- libfcoe.o \
- fcoe_sw.o \
- fc_transport_fcoe.o
+obj-$(CONFIG_LIBFCOE) += libfcoe.o
diff --git a/drivers/scsi/fcoe/fc_transport_fcoe.c b/drivers/scsi/fcoe/fc_transport_fcoe.c
deleted file mode 100644
index 7944c07..0000000
--- a/drivers/scsi/fcoe/fc_transport_fcoe.c
+++ /dev/null
@@ -1,329 +0,0 @@
-/*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Maintained at www.Open-FCoE.org
- */
-
-#include <linux/pci.h>
-#include <scsi/libfcoe.h>
-#include <scsi/fc_transport_fcoe.h>
-
-/* internal fcoe transport */
-struct fcoe_transport_internal {
- struct fcoe_transport *t;
- struct net_device *netdev;
- struct list_head list;
-};
-
-/* fcoe transports list and its lock */
-static LIST_HEAD(fcoe_transports);
-static DEFINE_MUTEX(fcoe_transports_lock);
-
-/**
- * fcoe_transport_default - returns ptr to the default transport fcoe_sw
- **/
-struct fcoe_transport *fcoe_transport_default(void)
-{
- return &fcoe_sw_transport;
-}
-
-/**
- * fcoe_transport_device_lookup - find out netdev is managed by the
- * transport
- * assign a transport to a device
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- **/
-static struct fcoe_transport_internal *fcoe_transport_device_lookup(
- struct fcoe_transport *t, struct net_device *netdev)
-{
- struct fcoe_transport_internal *ti;
-
- /* assign the transpor to this device */
- mutex_lock(&t->devlock);
- list_for_each_entry(ti, &t->devlist, list) {
- if (ti->netdev == netdev) {
- mutex_unlock(&t->devlock);
- return ti;
- }
- }
- mutex_unlock(&t->devlock);
- return NULL;
-}
-/**
- * fcoe_transport_device_add - assign a transport to a device
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- **/
-static int fcoe_transport_device_add(struct fcoe_transport *t,
- struct net_device *netdev)
-{
- struct fcoe_transport_internal *ti;
-
- ti = fcoe_transport_device_lookup(t, netdev);
- if (ti) {
- printk(KERN_DEBUG "fcoe_transport_device_add:"
- "device %s is already added to transport %s\n",
- netdev->name, t->name);
- return -EEXIST;
- }
- /* allocate an internal struct to host the netdev and the list */
- ti = kzalloc(sizeof(*ti), GFP_KERNEL);
- if (!ti)
- return -ENOMEM;
-
- ti->t = t;
- ti->netdev = netdev;
- INIT_LIST_HEAD(&ti->list);
- dev_hold(ti->netdev);
-
- mutex_lock(&t->devlock);
- list_add(&ti->list, &t->devlist);
- mutex_unlock(&t->devlock);
-
- printk(KERN_DEBUG "fcoe_transport_device_add:"
- "device %s added to transport %s\n",
- netdev->name, t->name);
-
- return 0;
-}
-
-/**
- * fcoe_transport_device_remove - remove a device from its transport
- * @netdev: the netdev the transport to be attached to
- *
- * this removes the device from the transport so the given transport will
- * not manage this device any more
- *
- * Returns: 0 for success
- **/
-static int fcoe_transport_device_remove(struct fcoe_transport *t,
- struct net_device *netdev)
-{
- struct fcoe_transport_internal *ti;
-
- ti = fcoe_transport_device_lookup(t, netdev);
- if (!ti) {
- printk(KERN_DEBUG "fcoe_transport_device_remove:"
- "device %s is not managed by transport %s\n",
- netdev->name, t->name);
- return -ENODEV;
- }
- mutex_lock(&t->devlock);
- list_del(&ti->list);
- mutex_unlock(&t->devlock);
- printk(KERN_DEBUG "fcoe_transport_device_remove:"
- "device %s removed from transport %s\n",
- netdev->name, t->name);
- dev_put(ti->netdev);
- kfree(ti);
- return 0;
-}
-
-/**
- * fcoe_transport_device_remove_all - remove all from transport devlist
- *
- * this removes the device from the transport so the given transport will
- * not manage this device any more
- *
- * Returns: 0 for success
- **/
-static void fcoe_transport_device_remove_all(struct fcoe_transport *t)
-{
- struct fcoe_transport_internal *ti, *tmp;
-
- mutex_lock(&t->devlock);
- list_for_each_entry_safe(ti, tmp, &t->devlist, list) {
- list_del(&ti->list);
- kfree(ti);
- }
- mutex_unlock(&t->devlock);
-}
-
-/**
- * fcoe_transport_register - adds a fcoe transport to the fcoe transports list
- * @t: ptr to the fcoe transport to be added
- *
- * Returns: 0 for success
- **/
-int fcoe_transport_register(struct fcoe_transport *t)
-{
- struct fcoe_transport *tt;
-
- /* TODO - add fcoe_transport specific initialization here */
- mutex_lock(&fcoe_transports_lock);
- list_for_each_entry(tt, &fcoe_transports, list) {
- if (tt == t) {
- mutex_unlock(&fcoe_transports_lock);
- return -EEXIST;
- }
- }
- list_add_tail(&t->list, &fcoe_transports);
- mutex_unlock(&fcoe_transports_lock);
-
- mutex_init(&t->devlock);
- INIT_LIST_HEAD(&t->devlist);
-
- printk(KERN_DEBUG "fcoe_transport_register:%s\n", t->name);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_register);
-
-/**
- * fcoe_transport_unregister - remove the tranport fro the fcoe transports list
- * @t: ptr to the fcoe transport to be removed
- *
- * Returns: 0 for success
- **/
-int fcoe_transport_unregister(struct fcoe_transport *t)
-{
- struct fcoe_transport *tt, *tmp;
-
- mutex_lock(&fcoe_transports_lock);
- list_for_each_entry_safe(tt, tmp, &fcoe_transports, list) {
- if (tt == t) {
- list_del(&t->list);
- mutex_unlock(&fcoe_transports_lock);
- fcoe_transport_device_remove_all(t);
- printk(KERN_DEBUG "fcoe_transport_unregister:%s\n",
- t->name);
- return 0;
- }
- }
- mutex_unlock(&fcoe_transports_lock);
- return -ENODEV;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_unregister);
-
-/**
- * fcoe_transport_attach - load transport to fcoe
- * @netdev: the netdev the transport to be attached to
- *
- * This will look for existing offload driver, if not found, it falls back to
- * the default sw hba (fcoe_sw) as its fcoe transport.
- *
- * Returns: 0 for success
- **/
-int fcoe_transport_attach(struct net_device *netdev)
-{
- struct fcoe_transport *t;
-
- /* find the corresponding transport */
- t = fcoe_transport_default();
- if (!t) {
- printk(KERN_DEBUG "fcoe_transport_attach"
- ":no transport for %s:use %s\n",
- netdev->name, t->name);
- return -ENODEV;
- }
- /* add to the transport */
- if (fcoe_transport_device_add(t, netdev)) {
- printk(KERN_DEBUG "fcoe_transport_attach"
- ":failed to add %s to tramsport %s\n",
- netdev->name, t->name);
- return -EIO;
- }
- /* transport create function */
- if (t->create)
- t->create(netdev);
-
- printk(KERN_DEBUG "fcoe_transport_attach:transport %s for %s\n",
- t->name, netdev->name);
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_attach);
-
-/**
- * fcoe_transport_release - unload transport from fcoe
- * @netdev: the net device on which fcoe is to be released
- *
- * Returns: 0 for success
- **/
-int fcoe_transport_release(struct net_device *netdev)
-{
- struct fcoe_transport *t;
-
- /* find the corresponding transport */
- t = fcoe_transport_default();
- if (!t) {
- printk(KERN_DEBUG "fcoe_transport_release:"
- "no transport for %s:use %s\n",
- netdev->name, t->name);
- return -ENODEV;
- }
- /* remove the device from the transport */
- if (fcoe_transport_device_remove(t, netdev)) {
- printk(KERN_DEBUG "fcoe_transport_release:"
- "failed to add %s to tramsport %s\n",
- netdev->name, t->name);
- return -EIO;
- }
- /* transport destroy function */
- if (t->destroy)
- t->destroy(netdev);
-
- printk(KERN_DEBUG "fcoe_transport_release:"
- "device %s dettached from transport %s\n",
- netdev->name, t->name);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_transport_release);
-
-/**
- * fcoe_transport_init - initializes fcoe transport layer
- *
- * This prepares for the fcoe transport layer
- *
- * Returns: none
- **/
-int __init fcoe_transport_init(void)
-{
- INIT_LIST_HEAD(&fcoe_transports);
- mutex_init(&fcoe_transports_lock);
- return 0;
-}
-
-/**
- * fcoe_transport_exit - cleans up the fcoe transport layer
- * This cleans up the fcoe transport layer. removing any transport on the list,
- * note that the transport destroy func is not called here.
- *
- * Returns: none
- **/
-int __exit fcoe_transport_exit(void)
-{
- struct fcoe_transport *t, *tmp;
-
- mutex_lock(&fcoe_transports_lock);
- list_for_each_entry_safe(t, tmp, &fcoe_transports, list) {
- list_del(&t->list);
- mutex_unlock(&fcoe_transports_lock);
- fcoe_transport_device_remove_all(t);
- mutex_lock(&fcoe_transports_lock);
- }
- mutex_unlock(&fcoe_transports_lock);
- return 0;
-}
diff --git a/drivers/scsi/fcoe/fcoe.c b/drivers/scsi/fcoe/fcoe.c
new file mode 100644
index 0000000..faa9ddf
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe.c
@@ -0,0 +1,1894 @@
+/*
+ * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#include <linux/module.h>
+#include <linux/version.h>
+#include <linux/spinlock.h>
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/ethtool.h>
+#include <linux/if_ether.h>
+#include <linux/if_vlan.h>
+#include <linux/crc32.h>
+#include <linux/cpu.h>
+#include <linux/fs.h>
+#include <linux/sysfs.h>
+#include <linux/ctype.h>
+#include <linux/rtnetlink.h>
+#include <scsi/scsi_tcq.h>
+#include <scsi/scsicam.h>
+#include <scsi/scsi_transport.h>
+#include <scsi/scsi_transport_fc.h>
+
+#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fip.h>
+
+#include <scsi/libfc.h>
+#include <scsi/fc_frame.h>
+#include <scsi/libfcoe.h>
+
+#include "fcoe.h"
+
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FCoE");
+MODULE_LICENSE("GPL v2");
+
+/* fcoe host list */
+LIST_HEAD(fcoe_hostlist);
+DEFINE_RWLOCK(fcoe_hostlist_lock);
+DEFINE_TIMER(fcoe_timer, NULL, 0, 0);
+DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
+
+/* Function Prototyes */
+static int fcoe_reset(struct Scsi_Host *shost);
+static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
+static int fcoe_rcv(struct sk_buff *, struct net_device *,
+ struct packet_type *, struct net_device *);
+static int fcoe_percpu_receive_thread(void *arg);
+static void fcoe_clean_pending_queue(struct fc_lport *lp);
+static void fcoe_percpu_clean(struct fc_lport *lp);
+static int fcoe_link_ok(struct fc_lport *lp);
+
+static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
+static int fcoe_hostlist_add(const struct fc_lport *);
+static int fcoe_hostlist_remove(const struct fc_lport *);
+
+static int fcoe_check_wait_queue(struct fc_lport *);
+static int fcoe_device_notification(struct notifier_block *, ulong, void *);
+static void fcoe_dev_setup(void);
+static void fcoe_dev_cleanup(void);
+
+/* notification function from net device */
+static struct notifier_block fcoe_notifier = {
+ .notifier_call = fcoe_device_notification,
+};
+
+static struct scsi_transport_template *scsi_transport_fcoe_sw;
+
+struct fc_function_template fcoe_transport_function = {
+ .show_host_node_name = 1,
+ .show_host_port_name = 1,
+ .show_host_supported_classes = 1,
+ .show_host_supported_fc4s = 1,
+ .show_host_active_fc4s = 1,
+ .show_host_maxframe_size = 1,
+
+ .show_host_port_id = 1,
+ .show_host_supported_speeds = 1,
+ .get_host_speed = fc_get_host_speed,
+ .show_host_speed = 1,
+ .show_host_port_type = 1,
+ .get_host_port_state = fc_get_host_port_state,
+ .show_host_port_state = 1,
+ .show_host_symbolic_name = 1,
+
+ .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
+ .show_rport_maxframe_size = 1,
+ .show_rport_supported_classes = 1,
+
+ .show_host_fabric_name = 1,
+ .show_starget_node_name = 1,
+ .show_starget_port_name = 1,
+ .show_starget_port_id = 1,
+ .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
+ .show_rport_dev_loss_tmo = 1,
+ .get_fc_host_stats = fc_get_host_stats,
+ .issue_fc_host_lip = fcoe_reset,
+
+ .terminate_rport_io = fc_rport_terminate_io,
+};
+
+static struct scsi_host_template fcoe_shost_template = {
+ .module = THIS_MODULE,
+ .name = "FCoE Driver",
+ .proc_name = FCOE_NAME,
+ .queuecommand = fc_queuecommand,
+ .eh_abort_handler = fc_eh_abort,
+ .eh_device_reset_handler = fc_eh_device_reset,
+ .eh_host_reset_handler = fc_eh_host_reset,
+ .slave_alloc = fc_slave_alloc,
+ .change_queue_depth = fc_change_queue_depth,
+ .change_queue_type = fc_change_queue_type,
+ .this_id = -1,
+ .cmd_per_lun = 32,
+ .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
+ .use_clustering = ENABLE_CLUSTERING,
+ .sg_tablesize = SG_ALL,
+ .max_sectors = 0xffff,
+};
+
+/**
+ * fcoe_lport_config() - sets up the fc_lport
+ * @lp: ptr to the fc_lport
+ * @shost: ptr to the parent scsi host
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_lport_config(struct fc_lport *lp)
+{
+ lp->link_up = 0;
+ lp->qfull = 0;
+ lp->max_retry_count = 3;
+ lp->max_rport_retry_count = 3;
+ lp->e_d_tov = 2 * 1000; /* FC-FS default */
+ lp->r_a_tov = 2 * 2 * 1000;
+ lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
+ FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
+
+ fc_lport_init_stats(lp);
+
+ /* lport fc_lport related configuration */
+ fc_lport_config(lp);
+
+ /* offload related configuration */
+ lp->crc_offload = 0;
+ lp->seq_offload = 0;
+ lp->lro_enabled = 0;
+ lp->lro_xid = 0;
+ lp->lso_max = 0;
+
+ return 0;
+}
+
+/**
+ * fcoe_netdev_config() - Set up netdev for SW FCoE
+ * @lp : ptr to the fc_lport
+ * @netdev : ptr to the associated netdevice struct
+ *
+ * Must be called after fcoe_lport_config() as it will use lport mutex
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_netdev_config(struct fc_lport *lp, struct net_device *netdev)
+{
+ u32 mfs;
+ u64 wwnn, wwpn;
+ struct fcoe_softc *fc;
+ u8 flogi_maddr[ETH_ALEN];
+
+ /* Setup lport private data to point to fcoe softc */
+ fc = lport_priv(lp);
+ fc->ctlr.lp = lp;
+ fc->real_dev = netdev;
+ fc->phys_dev = netdev;
+
+ /* Require support for get_pauseparam ethtool op. */
+ if (netdev->priv_flags & IFF_802_1Q_VLAN)
+ fc->phys_dev = vlan_dev_real_dev(netdev);
+
+ /* Do not support for bonding device */
+ if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
+ (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
+ (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
+ return -EOPNOTSUPP;
+ }
+
+ /*
+ * Determine max frame size based on underlying device and optional
+ * user-configured limit. If the MFS is too low, fcoe_link_ok()
+ * will return 0, so do this first.
+ */
+ mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
+ sizeof(struct fcoe_crc_eof));
+ if (fc_set_mfs(lp, mfs))
+ return -EINVAL;
+
+ /* offload features support */
+ if (fc->real_dev->features & NETIF_F_SG)
+ lp->sg_supp = 1;
+
+#ifdef NETIF_F_FCOE_CRC
+ if (netdev->features & NETIF_F_FCOE_CRC) {
+ lp->crc_offload = 1;
+ FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
+ }
+#endif
+
+#ifdef FCOE_NETDEV_BACKPORT
+#ifdef NETIF_F_FSO
+ if (netdev->features & NETIF_F_FSO) {
+ lp->seq_offload = 1;
+ lp->lso_max = netdev->gso_max_size;
+ FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
+ lp->lso_max);
+ }
+#endif
+ if (netdev->fcoe_ddp_xid) {
+ lp->lro_enabled = 1;
+ lp->lro_xid = netdev->fcoe_ddp_xid;
+ FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
+ lp->lro_xid);
+ }
+#endif
+ skb_queue_head_init(&fc->fcoe_pending_queue);
+ fc->fcoe_pending_queue_active = 0;
+
+ /* setup Source Mac Address */
+ memcpy(fc->ctlr.ctl_src_addr, fc->real_dev->dev_addr,
+ fc->real_dev->addr_len);
+
+ wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
+ fc_set_wwnn(lp, wwnn);
+ /* XXX - 3rd arg needs to be vlan id */
+ wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
+ fc_set_wwpn(lp, wwpn);
+
+ /*
+ * Add FCoE MAC address as second unicast MAC address
+ * or enter promiscuous mode if not capable of listening
+ * for multiple unicast MACs.
+ */
+#ifdef FCOE_NETDEV_BACKPORT
+ rtnl_lock();
+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+ dev_unicast_add(fc->real_dev, flogi_maddr, ETH_ALEN);
+ rtnl_unlock();
+#else
+ dev_set_promiscuity(fc->real_dev, 1);
+#endif
+
+ /*
+ * setup the receive function from ethernet driver
+ * on the ethertype for the given device
+ */
+ fc->fcoe_packet_type.func = fcoe_rcv;
+ fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
+ fc->fcoe_packet_type.dev = fc->real_dev;
+ dev_add_pack(&fc->fcoe_packet_type);
+
+ return 0;
+}
+
+/**
+ * fcoe_shost_config() - Sets up fc_lport->host
+ * @lp : ptr to the fc_lport
+ * @shost : ptr to the associated scsi host
+ * @dev : device associated to scsi host
+ *
+ * Must be called after fcoe_lport_config() and fcoe_netdev_config()
+ *
+ * Returns : 0 for success
+ */
+static int fcoe_shost_config(struct fc_lport *lp, struct Scsi_Host *shost,
+ struct device *dev)
+{
+ int rc = 0;
+
+ /* lport scsi host config */
+ lp->host = shost;
+
+ lp->host->max_lun = FCOE_MAX_LUN;
+ lp->host->max_id = FCOE_MAX_FCP_TARGET;
+ lp->host->max_channel = 0;
+ lp->host->transportt = scsi_transport_fcoe_sw;
+
+ /* add the new host to the SCSI-ml */
+ rc = scsi_add_host(lp->host, dev);
+ if (rc) {
+ FCOE_NETDEV_DBG(fcoe_netdev(lp), "fcoe_shost_config: "
+ "error on scsi_add_host\n");
+ return rc;
+ }
+ sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
+ FCOE_NAME, FCOE_VERSION,
+ fcoe_netdev(lp)->name);
+
+ return 0;
+}
+
+/**
+ * fcoe_em_config() - allocates em for this lport
+ * @lp: the port that em is to allocated for
+ *
+ * Returns : 0 on success
+ */
+static inline int fcoe_em_config(struct fc_lport *lp)
+{
+ BUG_ON(lp->emp);
+
+ lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
+ FCOE_MIN_XID, FCOE_MAX_XID);
+ if (!lp->emp)
+ return -ENOMEM;
+
+ return 0;
+}
+
+/**
+ * fcoe_if_destroy() - FCoE software HBA tear-down function
+ * @netdev: ptr to the associated net_device
+ *
+ * Returns: 0 if link is OK for use by FCoE.
+ */
+static int fcoe_if_destroy(struct net_device *netdev)
+{
+ struct fc_lport *lp = NULL;
+ struct fcoe_softc *fc;
+ u8 flogi_maddr[ETH_ALEN];
+
+ BUG_ON(!netdev);
+
+ FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
+
+ lp = fcoe_hostlist_lookup(netdev);
+ if (!lp)
+ return -ENODEV;
+
+ fc = lport_priv(lp);
+
+ /* Logout of the fabric */
+ fc_fabric_logoff(lp);
+
+ /* Remove the instance from fcoe's list */
+ fcoe_hostlist_remove(lp);
+
+ /* Don't listen for Ethernet packets anymore */
+ dev_remove_pack(&fc->fcoe_packet_type);
+ dev_remove_pack(&fc->fip_packet_type);
+ fcoe_ctlr_destroy(&fc->ctlr);
+
+ /* Cleanup the fc_lport */
+ fc_lport_destroy(lp);
+ fc_fcp_destroy(lp);
+
+ /* Detach from the scsi-ml */
+ fc_remove_host(lp->host);
+ scsi_remove_host(lp->host);
+
+ /* There are no more rports or I/O, free the EM */
+ if (lp->emp)
+ fc_exch_mgr_free(lp->emp);
+
+#ifdef FCOE_NETDEV_BACKPORT
+ /* Delete secondary MAC addresses */
+ rtnl_lock();
+ memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
+ dev_unicast_delete(fc->real_dev, flogi_maddr, ETH_ALEN);
+ if (!is_zero_ether_addr(fc->ctlr.data_src_addr))
+ dev_unicast_delete(fc->real_dev,
+ fc->ctlr.data_src_addr, ETH_ALEN);
+ dev_mc_delete(fc->real_dev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
+ rtnl_unlock();
+#else
+ dev_set_promiscuity(fc->real_dev, -1);
+#endif
+
+ /* Free the per-CPU revieve threads */
+ fcoe_percpu_clean(lp);
+
+ /* Free existing skbs */
+ fcoe_clean_pending_queue(lp);
+
+ /* Free memory used by statistical counters */
+ fc_lport_free_stats(lp);
+
+ /* Release the net_device and Scsi_Host */
+ dev_put(fc->real_dev);
+ scsi_host_put(lp->host);
+
+ return 0;
+}
+
+/*
+ * fcoe_ddp_setup - calls LLD's ddp_setup through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ * @sgl: the scatterlist describing this transfer
+ * @sgc: number of sg items
+ *
+ * Returns : 0 no ddp
+ */
+static int fcoe_ddp_setup(struct fc_lport *lp, u16 xid,
+ struct scatterlist *sgl, unsigned int sgc)
+{
+ struct net_device *n = fcoe_netdev(lp);
+
+#ifdef FCOE_NETDEV_BACKPORT
+ if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_setup)
+ return n->netdev_ops->ndo_fcoe_ddp_setup(n, xid, sgl, sgc);
+#endif
+ return 0;
+}
+
+/*
+ * fcoe_ddp_done - calls LLD's ddp_done through net_device
+ * @lp: the corresponding fc_lport
+ * @xid: the exchange id for this ddp transfer
+ *
+ * Returns : the length of data that have been completed by ddp
+ */
+static int fcoe_ddp_done(struct fc_lport *lp, u16 xid)
+{
+ struct net_device *n = fcoe_netdev(lp);
+
+#ifdef FCOE_NETDEV_BACKPORT
+ if (n->netdev_ops && n->netdev_ops->ndo_fcoe_ddp_done)
+ return n->netdev_ops->ndo_fcoe_ddp_done(n, xid);
+#endif
+ return 0;
+}
+
+static struct libfc_function_template fcoe_libfc_fcn_templ = {
+ .frame_send = fcoe_xmit,
+ .ddp_setup = fcoe_ddp_setup,
+ .ddp_done = fcoe_ddp_done,
+};
+
+/**
+ * fcoe_fip_recv - handle a received FIP frame.
+ * @skb: the receive skb
+ * @dev: associated &net_device
+ * @ptype: the &packet_type structure which was used to register this handler.
+ * @orig_dev: original receive &net_device, in case @dev is a bond.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *ptype,
+ struct net_device *orig_dev)
+{
+ struct fcoe_softc *fc;
+
+ fc = container_of(ptype, struct fcoe_softc, fip_packet_type);
+ fcoe_ctlr_recv(&fc->ctlr, skb);
+ return 0;
+}
+
+/**
+ * fcoe_fip_send() - send an Ethernet-encapsulated FIP frame.
+ * @fip: FCoE controller.
+ * @skb: FIP Packet.
+ */
+static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
+{
+ skb->dev = fcoe_from_ctlr(fip)->real_dev;
+ dev_queue_xmit(skb);
+}
+
+/**
+ * fcoe_update_src_mac() - Update Ethernet MAC filters.
+ * @fip: FCoE controller.
+ * @old: Unicast MAC address to delete if the MAC is non-zero.
+ * @new: Unicast MAC address to add.
+ *
+ * Remove any previously-set unicast MAC filter.
+ * Add secondary FCoE MAC address filter for our OUI.
+ */
+static void fcoe_update_src_mac(struct fcoe_ctlr *fip, u8 *old, u8 *new)
+{
+ struct fcoe_softc *fc;
+
+ fc = fcoe_from_ctlr(fip);
+#ifdef FCOE_NETDEV_BACKPORT
+ rtnl_lock();
+ if (!is_zero_ether_addr(old))
+ dev_unicast_delete(fc->real_dev, old, ETH_ALEN);
+ dev_unicast_add(fc->real_dev, new, ETH_ALEN);
+ rtnl_unlock();
+#endif
+}
+
+/**
+ * fcoe_if_create() - this function creates the fcoe interface
+ * @netdev: pointer the associated netdevice
+ *
+ * Creates fc_lport struct and scsi_host for lport, configures lport
+ * and starts fabric login.
+ *
+ * Returns : 0 on success
+ */
+static int fcoe_if_create(struct net_device *netdev)
+{
+ int rc;
+ struct fc_lport *lp = NULL;
+ struct fcoe_softc *fc;
+ struct Scsi_Host *shost;
+
+ BUG_ON(!netdev);
+
+ FCOE_NETDEV_DBG(netdev, "Create Interface\n");
+
+ lp = fcoe_hostlist_lookup(netdev);
+ if (lp)
+ return -EEXIST;
+
+ shost = libfc_host_alloc(&fcoe_shost_template,
+ sizeof(struct fcoe_softc));
+ if (!shost) {
+ FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
+ return -ENOMEM;
+ }
+ lp = shost_priv(shost);
+ fc = lport_priv(lp);
+
+ /* configure fc_lport, e.g., em */
+ rc = fcoe_lport_config(lp);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
+ "interface\n");
+ goto out_host_put;
+ }
+
+ /* configure lport network properties */
+ rc = fcoe_netdev_config(lp, netdev);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
+ "interface\n");
+ goto out_host_put;
+ }
+
+ /*
+ * Initialize FIP.
+ */
+ fcoe_ctlr_init(&fc->ctlr);
+ fc->ctlr.send = fcoe_fip_send;
+ fc->ctlr.update_mac = fcoe_update_src_mac;
+
+ fc->fip_packet_type.func = fcoe_fip_recv;
+ fc->fip_packet_type.type = htons(ETH_P_FIP);
+ fc->fip_packet_type.dev = fc->real_dev;
+ dev_add_pack(&fc->fip_packet_type);
+
+ /* configure lport scsi host properties */
+ rc = fcoe_shost_config(lp, shost, netdev->class_dev.dev->parent);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
+ "interface\n");
+ goto out_host_put;
+ }
+
+ /* lport exch manager allocation */
+ rc = fcoe_em_config(lp);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure the EM for the "
+ "interface\n");
+ goto out_host_put;
+ }
+
+ /* Initialize the library */
+ rc = fcoe_libfc_config(lp, &fcoe_libfc_fcn_templ);
+ if (rc) {
+ FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
+ "interface\n");
+ goto out_lp_destroy;
+ }
+
+ /* add to lports list */
+ fcoe_hostlist_add(lp);
+
+ lp->boot_time = jiffies;
+
+ fc_fabric_login(lp);
+
+ if (!fcoe_link_ok(lp))
+ fcoe_ctlr_link_up(&fc->ctlr);
+
+ dev_hold(netdev);
+
+ return rc;
+
+out_lp_destroy:
+ fc_exch_mgr_free(lp->emp); /* Free the EM */
+out_host_put:
+ scsi_host_put(lp->host);
+ return rc;
+}
+
+/**
+ * fcoe_if_init() - attach to scsi transport
+ *
+ * Returns : 0 on success
+ */
+static int __init fcoe_if_init(void)
+{
+ /* attach to scsi transport */
+ scsi_transport_fcoe_sw =
+ fc_attach_transport(&fcoe_transport_function);
+
+ if (!scsi_transport_fcoe_sw) {
+ printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+/**
+ * fcoe_if_exit() - detach from scsi transport
+ *
+ * Returns : 0 on success
+ */
+int __exit fcoe_if_exit(void)
+{
+ fc_release_transport(scsi_transport_fcoe_sw);
+ return 0;
+}
+
+/**
+ * fcoe_percpu_thread_create() - Create a receive thread for an online cpu
+ * @cpu: cpu index for the online cpu
+ */
+static void fcoe_percpu_thread_create(unsigned int cpu)
+{
+ struct fcoe_percpu_s *p;
+ struct task_struct *thread;
+
+ p = &per_cpu(fcoe_percpu, cpu);
+
+ thread = kthread_create(fcoe_percpu_receive_thread,
+ (void *)p, "fcoethread/%d", cpu);
+
+ if (likely(!IS_ERR(p->thread))) {
+ kthread_bind(thread, cpu);
+ wake_up_process(thread);
+
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ p->thread = thread;
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+ }
+}
+
+/**
+ * fcoe_percpu_thread_destroy() - removes the rx thread for the given cpu
+ * @cpu: cpu index the rx thread is to be removed
+ *
+ * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
+ * current CPU's Rx thread. If the thread being destroyed is bound to
+ * the CPU processing this context the skbs will be freed.
+ */
+static void fcoe_percpu_thread_destroy(unsigned int cpu)
+{
+ struct fcoe_percpu_s *p;
+ struct task_struct *thread;
+ struct page *crc_eof;
+ struct sk_buff *skb;
+#ifdef CONFIG_SMP
+ struct fcoe_percpu_s *p0;
+ unsigned targ_cpu = smp_processor_id();
+#endif /* CONFIG_SMP */
+
+ FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
+
+ /* Prevent any new skbs from being queued for this CPU. */
+ p = &per_cpu(fcoe_percpu, cpu);
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ thread = p->thread;
+ p->thread = NULL;
+ crc_eof = p->crc_eof_page;
+ p->crc_eof_page = NULL;
+ p->crc_eof_offset = 0;
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+
+#ifdef CONFIG_SMP
+ /*
+ * Don't bother moving the skb's if this context is running
+ * on the same CPU that is having its thread destroyed. This
+ * can easily happen when the module is removed.
+ */
+ if (cpu != targ_cpu) {
+ p0 = &per_cpu(fcoe_percpu, targ_cpu);
+ spin_lock_bh(&p0->fcoe_rx_list.lock);
+ if (p0->thread) {
+ FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
+ cpu, targ_cpu);
+
+ while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+ __skb_queue_tail(&p0->fcoe_rx_list, skb);
+ spin_unlock_bh(&p0->fcoe_rx_list.lock);
+ } else {
+ /*
+ * The targeted CPU is not initialized and cannot accept
+ * new skbs. Unlock the targeted CPU and drop the skbs
+ * on the CPU that is going offline.
+ */
+ while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+ kfree_skb(skb);
+ spin_unlock_bh(&p0->fcoe_rx_list.lock);
+ }
+ } else {
+ /*
+ * This scenario occurs when the module is being removed
+ * and all threads are being destroyed. skbs will continue
+ * to be shifted from the CPU thread that is being removed
+ * to the CPU thread associated with the CPU that is processing
+ * the module removal. Once there is only one CPU Rx thread it
+ * will reach this case and we will drop all skbs and later
+ * stop the thread.
+ */
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+ kfree_skb(skb);
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+ }
+#else
+ /*
+ * This a non-SMP scenario where the singluar Rx thread is
+ * being removed. Free all skbs and stop the thread.
+ */
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
+ kfree_skb(skb);
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+#endif
+
+ if (thread)
+ kthread_stop(thread);
+
+ if (crc_eof)
+ put_page(crc_eof);
+}
+
+/**
+ * fcoe_cpu_callback() - fcoe cpu hotplug event callback
+ * @nfb: callback data block
+ * @action: event triggering the callback
+ * @hcpu: index for the cpu of this event
+ *
+ * This creates or destroys per cpu data for fcoe
+ *
+ * Returns NOTIFY_OK always.
+ */
+static int fcoe_cpu_callback(struct notifier_block *nfb,
+ unsigned long action, void *hcpu)
+{
+ unsigned cpu = (unsigned long)hcpu;
+
+ switch (action) {
+ case CPU_ONLINE:
+ case CPU_ONLINE_FROZEN:
+ FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
+ fcoe_percpu_thread_create(cpu);
+ break;
+ case CPU_DEAD:
+ case CPU_DEAD_FROZEN:
+ FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
+ fcoe_percpu_thread_destroy(cpu);
+ break;
+ default:
+ break;
+ }
+ return NOTIFY_OK;
+}
+
+static struct notifier_block fcoe_cpu_notifier = {
+ .notifier_call = fcoe_cpu_callback,
+};
+
+/**
+ * fcoe_rcv() - this is the fcoe receive function called by NET_RX_SOFTIRQ
+ * @skb: the receive skb
+ * @dev: associated net device
+ * @ptype: context
+ * @odldev: last device
+ *
+ * this function will receive the packet and build fc frame and pass it up
+ *
+ * Returns: 0 for success
+ */
+int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
+ struct packet_type *ptype, struct net_device *olddev)
+{
+ struct fc_lport *lp;
+ struct fcoe_rcv_info *fr;
+ struct fcoe_softc *fc;
+ struct fc_frame_header *fh;
+ struct fcoe_percpu_s *fps;
+ unsigned short oxid;
+ unsigned int cpu = 0;
+
+ fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
+ lp = fc->ctlr.lp;
+ if (unlikely(lp == NULL)) {
+ FCOE_NETDEV_DBG(dev, "Cannot find hba structure");
+ goto err2;
+ }
+ if (!lp->link_up)
+ goto err2;
+
+ FCOE_NETDEV_DBG(dev, "skb_info: len:%d data_len:%d head:%p "
+ "data:%p tail:%p end:%p sum:%d dev:%s",
+ skb->len, skb->data_len, skb->head, skb->data,
+ skb_tail_pointer(skb), skb_end_pointer(skb),
+ skb->csum, skb->dev ? skb->dev->name : "<NULL>");
+
+ /* check for FCOE packet type */
+ if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
+ FCOE_NETDEV_DBG(dev, "Wrong FC type frame");
+ goto err;
+ }
+
+ /*
+ * Check for minimum frame length, and make sure required FCoE
+ * and FC headers are pulled into the linear data area.
+ */
+ if (unlikely((skb->len < FCOE_MIN_FRAME) ||
+ !pskb_may_pull(skb, FCOE_HEADER_LEN)))
+ goto err;
+
+ skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+ oxid = ntohs(fh->fh_ox_id);
+
+ fr = fcoe_dev_from_skb(skb);
+ fr->fr_dev = lp;
+ fr->ptype = ptype;
+
+#ifdef CONFIG_SMP
+ /*
+ * The incoming frame exchange id(oxid) is ANDed with num of online
+ * cpu bits to get cpu and then this cpu is used for selecting
+ * a per cpu kernel thread from fcoe_percpu.
+ */
+ cpu = oxid & (num_online_cpus() - 1);
+#endif
+
+ fps = &per_cpu(fcoe_percpu, cpu);
+ spin_lock_bh(&fps->fcoe_rx_list.lock);
+ if (unlikely(!fps->thread)) {
+ /*
+ * The targeted CPU is not ready, let's target
+ * the first CPU now. For non-SMP systems this
+ * will check the same CPU twice.
+ */
+ FCOE_NETDEV_DBG(dev, "CPU is online, but no receive thread "
+ "ready for incoming skb- using first online "
+ "CPU.\n");
+
+ spin_unlock_bh(&fps->fcoe_rx_list.lock);
+ cpu = first_cpu(cpu_online_map);
+ fps = &per_cpu(fcoe_percpu, cpu);
+ spin_lock_bh(&fps->fcoe_rx_list.lock);
+ if (!fps->thread) {
+ spin_unlock_bh(&fps->fcoe_rx_list.lock);
+ goto err;
+ }
+ }
+
+ /*
+ * We now have a valid CPU that we're targeting for
+ * this skb. We also have this receive thread locked,
+ * so we're free to queue skbs into it's queue.
+ */
+ __skb_queue_tail(&fps->fcoe_rx_list, skb);
+ if (fps->fcoe_rx_list.qlen == 1)
+ wake_up_process(fps->thread);
+
+ spin_unlock_bh(&fps->fcoe_rx_list.lock);
+
+ return 0;
+err:
+ fc_lport_get_stats(lp)->ErrorFrames++;
+
+err2:
+ kfree_skb(skb);
+ return -1;
+}
+EXPORT_SYMBOL_GPL(fcoe_rcv);
+
+/**
+ * fcoe_start_io() - pass to netdev to start xmit for fcoe
+ * @skb: the skb to be xmitted
+ *
+ * Returns: 0 for success
+ */
+static inline int fcoe_start_io(struct sk_buff *skb)
+{
+ int rc;
+
+ skb_get(skb);
+ rc = dev_queue_xmit(skb);
+ if (rc != 0)
+ return rc;
+ kfree_skb(skb);
+ return 0;
+}
+
+/**
+ * fcoe_get_paged_crc_eof() - in case we need alloc a page for crc_eof
+ * @skb: the skb to be xmitted
+ * @tlen: total len
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+{
+ struct fcoe_percpu_s *fps;
+ struct page *page;
+
+ fps = &get_cpu_var(fcoe_percpu);
+ page = fps->crc_eof_page;
+ if (!page) {
+ page = alloc_page(GFP_ATOMIC);
+ if (!page) {
+ put_cpu_var(fcoe_percpu);
+ return -ENOMEM;
+ }
+ fps->crc_eof_page = page;
+ fps->crc_eof_offset = 0;
+ }
+
+ get_page(page);
+ skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
+ fps->crc_eof_offset, tlen);
+ skb->len += tlen;
+ skb->data_len += tlen;
+ skb->truesize += tlen;
+ fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
+
+ if (fps->crc_eof_offset >= PAGE_SIZE) {
+ fps->crc_eof_page = NULL;
+ fps->crc_eof_offset = 0;
+ put_page(page);
+ }
+ put_cpu_var(fcoe_percpu);
+ return 0;
+}
+
+/**
+ * fcoe_fc_crc() - calculates FC CRC in this fcoe skb
+ * @fp: the fc_frame containg data to be checksummed
+ *
+ * This uses crc32() to calculate the crc for fc frame
+ * Return : 32 bit crc
+ */
+u32 fcoe_fc_crc(struct fc_frame *fp)
+{
+ struct sk_buff *skb = fp_skb(fp);
+ struct skb_frag_struct *frag;
+ unsigned char *data;
+ unsigned long off, len, clen;
+ u32 crc;
+ unsigned i;
+
+ crc = crc32(~0, skb->data, skb_headlen(skb));
+
+ for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
+ frag = &skb_shinfo(skb)->frags[i];
+ off = frag->page_offset;
+ len = frag->size;
+ while (len > 0) {
+ clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
+ data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
+ KM_SKB_DATA_SOFTIRQ);
+ crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
+ kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
+ off += clen;
+ len -= clen;
+ }
+ }
+ return crc;
+}
+
+/**
+ * fcoe_xmit() - FCoE frame transmit function
+ * @lp: the associated local port
+ * @fp: the fc_frame to be transmitted
+ *
+ * Return : 0 for success
+ */
+int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+{
+ int wlen, rc = 0;
+ u32 crc;
+ struct ethhdr *eh;
+ struct fcoe_crc_eof *cp;
+ struct sk_buff *skb;
+ struct fcoe_dev_stats *stats;
+ struct fc_frame_header *fh;
+ unsigned int hlen; /* header length implies the version */
+ unsigned int tlen; /* trailer length */
+ unsigned int elen; /* eth header, may include vlan */
+ struct fcoe_softc *fc;
+ u8 sof, eof;
+ struct fcoe_hdr *hp;
+
+ WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
+
+ fc = lport_priv(lp);
+ fh = fc_frame_header_get(fp);
+ skb = fp_skb(fp);
+ wlen = skb->len / FCOE_WORD_TO_BYTE;
+
+ if (!lp->link_up) {
+ kfree_skb(skb);
+ return 0;
+ }
+
+ if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
+ fcoe_ctlr_els_send(&fc->ctlr, skb))
+ return 0;
+
+ sof = fr_sof(fp);
+ eof = fr_eof(fp);
+
+ elen = (fc->real_dev->priv_flags & IFF_802_1Q_VLAN) ?
+ sizeof(struct vlan_ethhdr) : sizeof(struct ethhdr);
+ hlen = sizeof(struct fcoe_hdr);
+ tlen = sizeof(struct fcoe_crc_eof);
+ wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
+
+#ifdef FCOE_NETDEV_BACKPORT
+ /* crc offload */
+ if (likely(lp->crc_offload)) {
+ skb->ip_summed = CHECKSUM_PARTIAL;
+ skb->csum_start = skb_headroom(skb);
+ skb->csum_offset = skb->len;
+ crc = 0;
+ } else {
+#else
+ skb->ip_summed = CHECKSUM_NONE;
+ crc = fcoe_fc_crc(fp);
+#endif
+ /* copy fc crc and eof to the skb buff */
+ if (skb_is_nonlinear(skb)) {
+ skb_frag_t *frag;
+ if (fcoe_get_paged_crc_eof(skb, tlen)) {
+ kfree_skb(skb);
+ return -ENOMEM;
+ }
+ frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
+ cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
+ + frag->page_offset;
+ } else {
+ cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
+ }
+
+ memset(cp, 0, sizeof(*cp));
+ cp->fcoe_eof = eof;
+ cp->fcoe_crc32 = cpu_to_le32(~crc);
+
+ if (skb_is_nonlinear(skb)) {
+ kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
+ cp = NULL;
+ }
+
+ /* adjust skb netowrk/transport offsets to match mac/fcoe/fc */
+ skb_push(skb, elen + hlen);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ skb->mac_len = elen;
+ skb->protocol = htons(ETH_P_FCOE);
+ skb->dev = fc->real_dev;
+
+ /* fill up mac and fcoe headers */
+ eh = eth_hdr(skb);
+ eh->h_proto = htons(ETH_P_FCOE);
+ if (fc->ctlr.map_dest)
+ fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
+ else
+ /* insert GW address */
+ memcpy(eh->h_dest, fc->ctlr.dest_addr, ETH_ALEN);
+
+ if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN))
+ memcpy(eh->h_source, fc->ctlr.ctl_src_addr, ETH_ALEN);
+ else
+ memcpy(eh->h_source, fc->ctlr.data_src_addr, ETH_ALEN);
+
+ hp = (struct fcoe_hdr *)(eh + 1);
+ memset(hp, 0, sizeof(*hp));
+ if (FC_FCOE_VER)
+ FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
+ hp->fcoe_sof = sof;
+
+#ifdef NETIF_F_FSO
+ /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
+ if (lp->seq_offload && fr_max_payload(fp)) {
+ skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
+ skb_shinfo(skb)->gso_size = fr_max_payload(fp);
+ } else {
+ skb_shinfo(skb)->gso_type = 0;
+ skb_shinfo(skb)->gso_size = 0;
+ }
+#endif
+ /* update tx stats: regardless if LLD fails */
+ stats = fc_lport_get_stats(lp);
+ stats->TxFrames++;
+ stats->TxWords += wlen;
+
+ /* send down to lld */
+ fr_dev(fp) = lp;
+ if (fc->fcoe_pending_queue.qlen)
+ rc = fcoe_check_wait_queue(lp);
+
+ if (rc == 0)
+ rc = fcoe_start_io(skb);
+
+ if (rc) {
+ spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ __skb_queue_tail(&fc->fcoe_pending_queue, skb);
+ spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
+ lp->qfull = 1;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_xmit);
+
+/**
+ * fcoe_percpu_receive_thread() - recv thread per cpu
+ * @arg: ptr to the fcoe per cpu struct
+ *
+ * Return: 0 for success
+ */
+int fcoe_percpu_receive_thread(void *arg)
+{
+ struct fcoe_percpu_s *p = arg;
+ u32 fr_len;
+ struct fc_lport *lp;
+ struct fcoe_rcv_info *fr;
+ struct fcoe_dev_stats *stats;
+ struct fc_frame_header *fh;
+ struct sk_buff *skb;
+ struct fcoe_crc_eof crc_eof;
+ struct fc_frame *fp;
+ u8 *mac = NULL;
+ struct fcoe_softc *fc;
+ struct fcoe_hdr *hp;
+
+ set_user_nice(current, -20);
+
+ while (!kthread_should_stop()) {
+
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
+ set_current_state(TASK_INTERRUPTIBLE);
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+ schedule();
+ set_current_state(TASK_RUNNING);
+ if (kthread_should_stop())
+ return 0;
+ spin_lock_bh(&p->fcoe_rx_list.lock);
+ }
+ spin_unlock_bh(&p->fcoe_rx_list.lock);
+ fr = fcoe_dev_from_skb(skb);
+ lp = fr->fr_dev;
+ if (unlikely(lp == NULL)) {
+ FCOE_NETDEV_DBG(skb->dev, "Invalid HBA Structure");
+ kfree_skb(skb);
+ continue;
+ }
+
+ FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
+ "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
+ skb->len, skb->data_len,
+ skb->head, skb->data, skb_tail_pointer(skb),
+ skb_end_pointer(skb), skb->csum,
+ skb->dev ? skb->dev->name : "<NULL>");
+
+ /*
+ * Save source MAC address before discarding header.
+ */
+ fc = lport_priv(lp);
+ if (skb_is_nonlinear(skb))
+ skb_linearize(skb); /* not ideal */
+ mac = eth_hdr(skb)->h_source;
+
+ /*
+ * Frame length checks and setting up the header pointers
+ * was done in fcoe_rcv already.
+ */
+ hp = (struct fcoe_hdr *) skb_network_header(skb);
+ fh = (struct fc_frame_header *) skb_transport_header(skb);
+
+ stats = fc_lport_get_stats(lp);
+ if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
+ if (stats->ErrorFrames < 5)
+ printk(KERN_WARNING "fcoe: FCoE version "
+ "mismatch: The frame has "
+ "version %x, but the "
+ "initiator supports version "
+ "%x\n", FC_FCOE_DECAPS_VER(hp),
+ FC_FCOE_VER);
+ stats->ErrorFrames++;
+ kfree_skb(skb);
+ continue;
+ }
+
+ skb_pull(skb, sizeof(struct fcoe_hdr));
+ fr_len = skb->len - sizeof(struct fcoe_crc_eof);
+
+ stats->RxFrames++;
+ stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
+
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_dev(fp) = lp;
+ fr_sof(fp) = hp->fcoe_sof;
+
+ /* Copy out the CRC and EOF trailer for access */
+ if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
+ kfree_skb(skb);
+ continue;
+ }
+ fr_eof(fp) = crc_eof.fcoe_eof;
+ fr_crc(fp) = crc_eof.fcoe_crc32;
+ if (pskb_trim(skb, fr_len)) {
+ kfree_skb(skb);
+ continue;
+ }
+
+ /*
+ * We only check CRC if no offload is available and if it is
+ * it's solicited data, in which case, the FCP layer would
+ * check it during the copy.
+ */
+ if (lp->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ else
+ fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
+
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
+ fh->fh_type == FC_TYPE_FCP) {
+ fc_exch_recv(lp, lp->emp, fp);
+ continue;
+ }
+ if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
+ if (le32_to_cpu(fr_crc(fp)) !=
+ ~crc32(~0, skb->data, fr_len)) {
+ if (stats->InvalidCRCCount < 5)
+ printk(KERN_WARNING "fcoe: dropping "
+ "frame with CRC error\n");
+ stats->InvalidCRCCount++;
+ stats->ErrorFrames++;
+ fc_frame_free(fp);
+ continue;
+ }
+ fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
+ }
+ if (unlikely(fc->ctlr.flogi_oxid != FC_XID_UNKNOWN) &&
+ fcoe_ctlr_recv_flogi(&fc->ctlr, fp, mac)) {
+ fc_frame_free(fp);
+ continue;
+ }
+ fc_exch_recv(lp, lp->emp, fp);
+ }
+ return 0;
+}
+
+/**
+ * fcoe_watchdog() - fcoe timer callback
+ * @vp:
+ *
+ * This checks the pending queue length for fcoe and set lport qfull
+ * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the
+ * fcoe_hostlist.
+ *
+ * Returns: 0 for success
+ */
+void fcoe_watchdog(ulong vp)
+{
+ struct fcoe_softc *fc;
+
+ read_lock(&fcoe_hostlist_lock);
+ list_for_each_entry(fc, &fcoe_hostlist, list) {
+ if (fc->ctlr.lp)
+ fcoe_check_wait_queue(fc->ctlr.lp);
+ }
+ read_unlock(&fcoe_hostlist_lock);
+
+ fcoe_timer.expires = jiffies + (1 * HZ);
+ add_timer(&fcoe_timer);
+}
+
+
+/**
+ * fcoe_check_wait_queue() - put the skb into fcoe pending xmit queue
+ * @lp: the fc_port for this skb
+ * @skb: the associated skb to be xmitted
+ *
+ * This empties the wait_queue, dequeue the head of the wait_queue queue
+ * and calls fcoe_start_io() for each packet, if all skb have been
+ * transmitted, return qlen or -1 if a error occurs, then restore
+ * wait_queue and try again later.
+ *
+ * The wait_queue is used when the skb transmit fails. skb will go
+ * in the wait_queue which will be emptied by the time function OR
+ * by the next skb transmit.
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_check_wait_queue(struct fc_lport *lp)
+{
+ struct fcoe_softc *fc = lport_priv(lp);
+ struct sk_buff *skb;
+ int rc = -1;
+
+ spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ if (fc->fcoe_pending_queue_active)
+ goto out;
+ fc->fcoe_pending_queue_active = 1;
+
+ while (fc->fcoe_pending_queue.qlen) {
+ /* keep qlen > 0 until fcoe_start_io succeeds */
+ fc->fcoe_pending_queue.qlen++;
+ skb = __skb_dequeue(&fc->fcoe_pending_queue);
+
+ spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ rc = fcoe_start_io(skb);
+ spin_lock_bh(&fc->fcoe_pending_queue.lock);
+
+ if (rc) {
+ __skb_queue_head(&fc->fcoe_pending_queue, skb);
+ /* undo temporary increment above */
+ fc->fcoe_pending_queue.qlen--;
+ break;
+ }
+ /* undo temporary increment above */
+ fc->fcoe_pending_queue.qlen--;
+ }
+
+ if (fc->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
+ lp->qfull = 0;
+ fc->fcoe_pending_queue_active = 0;
+ rc = fc->fcoe_pending_queue.qlen;
+out:
+ spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ return rc;
+}
+
+/**
+ * fcoe_dev_setup() - setup link change notification interface
+ */
+static void fcoe_dev_setup()
+{
+ /*
+ * here setup a interface specific wd time to
+ * monitor the link state
+ */
+ register_netdevice_notifier(&fcoe_notifier);
+}
+
+/**
+ * fcoe_dev_setup() - cleanup link change notification interface
+ */
+static void fcoe_dev_cleanup(void)
+{
+ unregister_netdevice_notifier(&fcoe_notifier);
+}
+
+/**
+ * fcoe_device_notification() - netdev event notification callback
+ * @notifier: context of the notification
+ * @event: type of event
+ * @ptr: fixed array for output parsed ifname
+ *
+ * This function is called by the ethernet driver in case of link change event
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_device_notification(struct notifier_block *notifier,
+ ulong event, void *ptr)
+{
+ struct fc_lport *lp = NULL;
+ struct net_device *real_dev = ptr;
+ struct fcoe_softc *fc;
+ struct fcoe_dev_stats *stats;
+ u32 link_possible = 1;
+ u32 mfs;
+ int rc = NOTIFY_OK;
+
+ read_lock(&fcoe_hostlist_lock);
+ list_for_each_entry(fc, &fcoe_hostlist, list) {
+ if (fc->real_dev == real_dev) {
+ lp = fc->ctlr.lp;
+ break;
+ }
+ }
+ read_unlock(&fcoe_hostlist_lock);
+ if (lp == NULL) {
+ rc = NOTIFY_DONE;
+ goto out;
+ }
+
+ switch (event) {
+ case NETDEV_DOWN:
+ case NETDEV_GOING_DOWN:
+ link_possible = 0;
+ break;
+ case NETDEV_UP:
+ case NETDEV_CHANGE:
+ break;
+ case NETDEV_CHANGEMTU:
+ mfs = fc->real_dev->mtu -
+ (sizeof(struct fcoe_hdr) +
+ sizeof(struct fcoe_crc_eof));
+ if (mfs >= FC_MIN_MAX_FRAME)
+ fc_set_mfs(lp, mfs);
+ break;
+ case NETDEV_REGISTER:
+ break;
+ default:
+ FCOE_NETDEV_DBG(real_dev, "Unknown event %ld "
+ "from netdev netlink\n", event);
+ }
+ if (link_possible && !fcoe_link_ok(lp))
+ fcoe_ctlr_link_up(&fc->ctlr);
+ else if (fcoe_ctlr_link_down(&fc->ctlr)) {
+ stats = fc_lport_get_stats(lp);
+ stats->LinkFailureCount++;
+ fcoe_clean_pending_queue(lp);
+ }
+out:
+ return rc;
+}
+
+/**
+ * fcoe_if_to_netdev() - parse a name buffer to get netdev
+ * @ifname: fixed array for output parsed ifname
+ * @buffer: incoming buffer to be copied
+ *
+ * Returns: NULL or ptr to netdeive
+ */
+static struct net_device *fcoe_if_to_netdev(const char *buffer)
+{
+ char *cp;
+ char ifname[IFNAMSIZ + 2];
+
+ if (buffer) {
+ strlcpy(ifname, buffer, IFNAMSIZ);
+ cp = ifname + strlen(ifname);
+ while (--cp >= ifname && *cp == '\n')
+ *cp = '\0';
+ return dev_get_by_name(&init_net, ifname);
+ }
+ return NULL;
+}
+
+/**
+ * fcoe_netdev_to_module_owner() - finds out the nic drive moddule of the netdev
+ * @netdev: the target netdev
+ *
+ * Returns: ptr to the struct module, NULL for failure
+ */
+static struct module *
+fcoe_netdev_to_module_owner(const struct net_device *netdev)
+{
+ struct device *dev;
+
+ if (!netdev)
+ return NULL;
+
+ dev = netdev->class_dev.dev->parent;
+ if (!dev)
+ return NULL;
+
+ if (!dev->driver)
+ return NULL;
+
+ return dev->driver->owner;
+}
+
+/**
+ * fcoe_ethdrv_get() - Hold the Ethernet driver
+ * @netdev: the target netdev
+ *
+ * Holds the Ethernet driver module by try_module_get() for
+ * the corresponding netdev.
+ *
+ * Returns: 0 for succsss
+ */
+static int fcoe_ethdrv_get(const struct net_device *netdev)
+{
+ struct module *owner;
+
+ owner = fcoe_netdev_to_module_owner(netdev);
+ if (owner) {
+ FCOE_NETDEV_DBG(netdev, "Hold driver module %s\n",
+ module_name(owner));
+ return try_module_get(owner);
+ }
+ return -ENODEV;
+}
+
+/**
+ * fcoe_ethdrv_put() - Release the Ethernet driver
+ * @netdev: the target netdev
+ *
+ * Releases the Ethernet driver module by module_put for
+ * the corresponding netdev.
+ *
+ * Returns: 0 for succsss
+ */
+static int fcoe_ethdrv_put(const struct net_device *netdev)
+{
+ struct module *owner;
+
+ owner = fcoe_netdev_to_module_owner(netdev);
+ if (owner) {
+ FCOE_NETDEV_DBG(netdev, "Release driver module %s\n",
+ module_name(owner));
+ module_put(owner);
+ return 0;
+ }
+ return -ENODEV;
+}
+
+/**
+ * fcoe_destroy() - handles the destroy from sysfs
+ * @buffer: expcted to be a eth if name
+ * @kp: associated kernel param
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
+{
+ int rc;
+ struct net_device *netdev;
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ rc = -ENODEV;
+ goto out_nodev;
+ }
+ /* look for existing lport */
+ if (!fcoe_hostlist_lookup(netdev)) {
+ rc = -ENODEV;
+ goto out_putdev;
+ }
+ rc = fcoe_if_destroy(netdev);
+ if (rc) {
+ printk(KERN_ERR "fcoe: Failed to destroy interface (%s)\n",
+ netdev->name);
+ rc = -EIO;
+ goto out_putdev;
+ }
+ fcoe_ethdrv_put(netdev);
+ rc = 0;
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ return rc;
+}
+
+/**
+ * fcoe_create() - Handles the create call from sysfs
+ * @buffer: expcted to be a eth if name
+ * @kp: associated kernel param
+ *
+ * Returns: 0 for success
+ */
+static int fcoe_create(const char *buffer, struct kernel_param *kp)
+{
+ int rc;
+ struct net_device *netdev;
+
+ netdev = fcoe_if_to_netdev(buffer);
+ if (!netdev) {
+ rc = -ENODEV;
+ goto out_nodev;
+ }
+ /* look for existing lport */
+ if (fcoe_hostlist_lookup(netdev)) {
+ rc = -EEXIST;
+ goto out_putdev;
+ }
+ fcoe_ethdrv_get(netdev);
+
+ rc = fcoe_if_create(netdev);
+ if (rc) {
+ printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
+ netdev->name);
+ fcoe_ethdrv_put(netdev);
+ rc = -EIO;
+ goto out_putdev;
+ }
+ rc = 0;
+out_putdev:
+ dev_put(netdev);
+out_nodev:
+ return rc;
+}
+
+module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(create, "string");
+MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
+module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
+__MODULE_PARM_TYPE(destroy, "string");
+MODULE_PARM_DESC(destroy, "Destroy fcoe port");
+
+/**
+ * fcoe_link_ok() - Check if link is ok for the fc_lport
+ * @lp: ptr to the fc_lport
+ *
+ * Any permanently-disqualifying conditions have been previously checked.
+ * This also updates the speed setting, which may change with link for 100/1000.
+ *
+ * This function should probably be checking for PAUSE support at some point
+ * in the future. Currently Per-priority-pause is not determinable using
+ * ethtool, so we shouldn't be restrictive until that problem is resolved.
+ *
+ * Returns: 0 if link is OK for use by FCoE.
+ *
+ */
+int fcoe_link_ok(struct fc_lport *lp)
+{
+ struct fcoe_softc *fc = lport_priv(lp);
+ struct net_device *dev = fc->real_dev;
+ struct ethtool_cmd ecmd = { ETHTOOL_GSET };
+ int rc = 0;
+
+ if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
+ dev = fc->phys_dev;
+ if (dev->ethtool_ops->get_settings) {
+ dev->ethtool_ops->get_settings(dev, &ecmd);
+ lp->link_supported_speeds &=
+ ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
+ if (ecmd.supported & (SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full))
+ lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
+ if (ecmd.supported & SUPPORTED_10000baseT_Full)
+ lp->link_supported_speeds |=
+ FC_PORTSPEED_10GBIT;
+ if (ecmd.speed == SPEED_1000)
+ lp->link_speed = FC_PORTSPEED_1GBIT;
+ if (ecmd.speed == SPEED_10000)
+ lp->link_speed = FC_PORTSPEED_10GBIT;
+ }
+ } else
+ rc = -1;
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(fcoe_link_ok);
+
+/**
+ * fcoe_percpu_clean() - Clear the pending skbs for an lport
+ * @lp: the fc_lport
+ */
+void fcoe_percpu_clean(struct fc_lport *lp)
+{
+ struct fcoe_percpu_s *pp;
+ struct fcoe_rcv_info *fr;
+ struct sk_buff_head *list;
+ struct sk_buff *skb, *next;
+ struct sk_buff *head;
+ unsigned int cpu;
+
+ for_each_possible_cpu(cpu) {
+ pp = &per_cpu(fcoe_percpu, cpu);
+ spin_lock_bh(&pp->fcoe_rx_list.lock);
+ list = &pp->fcoe_rx_list;
+ head = list->next;
+ for (skb = head; skb != (struct sk_buff *)list;
+ skb = next) {
+ next = skb->next;
+ fr = fcoe_dev_from_skb(skb);
+ if (fr->fr_dev == lp) {
+ __skb_unlink(skb, list);
+ kfree_skb(skb);
+ }
+ }
+ spin_unlock_bh(&pp->fcoe_rx_list.lock);
+ }
+}
+EXPORT_SYMBOL_GPL(fcoe_percpu_clean);
+
+/**
+ * fcoe_clean_pending_queue() - Dequeue a skb and free it
+ * @lp: the corresponding fc_lport
+ *
+ * Returns: none
+ */
+void fcoe_clean_pending_queue(struct fc_lport *lp)
+{
+ struct fcoe_softc *fc = lport_priv(lp);
+ struct sk_buff *skb;
+
+ spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
+ spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ kfree_skb(skb);
+ spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ }
+ spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+}
+EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
+
+/**
+ * fcoe_reset() - Resets the fcoe
+ * @shost: shost the reset is from
+ *
+ * Returns: always 0
+ */
+int fcoe_reset(struct Scsi_Host *shost)
+{
+ struct fc_lport *lport = shost_priv(shost);
+ fc_lport_reset(lport);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_reset);
+
+/**
+ * fcoe_hostlist_lookup_softc() - find the corresponding lport by a given device
+ * @device: this is currently ptr to net_device
+ *
+ * Returns: NULL or the located fcoe_softc
+ */
+static struct fcoe_softc *
+fcoe_hostlist_lookup_softc(const struct net_device *dev)
+{
+ struct fcoe_softc *fc;
+
+ read_lock(&fcoe_hostlist_lock);
+ list_for_each_entry(fc, &fcoe_hostlist, list) {
+ if (fc->real_dev == dev) {
+ read_unlock(&fcoe_hostlist_lock);
+ return fc;
+ }
+ }
+ read_unlock(&fcoe_hostlist_lock);
+ return NULL;
+}
+
+/**
+ * fcoe_hostlist_lookup() - Find the corresponding lport by netdev
+ * @netdev: ptr to net_device
+ *
+ * Returns: 0 for success
+ */
+struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
+{
+ struct fcoe_softc *fc;
+
+ fc = fcoe_hostlist_lookup_softc(netdev);
+
+ return (fc) ? fc->ctlr.lp : NULL;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_lookup);
+
+/**
+ * fcoe_hostlist_add() - Add a lport to lports list
+ * @lp: ptr to the fc_lport to badded
+ *
+ * Returns: 0 for success
+ */
+int fcoe_hostlist_add(const struct fc_lport *lp)
+{
+ struct fcoe_softc *fc;
+
+ fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
+ if (!fc) {
+ fc = lport_priv(lp);
+ write_lock_bh(&fcoe_hostlist_lock);
+ list_add_tail(&fc->list, &fcoe_hostlist);
+ write_unlock_bh(&fcoe_hostlist_lock);
+ }
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_add);
+
+/**
+ * fcoe_hostlist_remove() - remove a lport from lports list
+ * @lp: ptr to the fc_lport to badded
+ *
+ * Returns: 0 for success
+ */
+int fcoe_hostlist_remove(const struct fc_lport *lp)
+{
+ struct fcoe_softc *fc;
+
+ fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
+ BUG_ON(!fc);
+ write_lock_bh(&fcoe_hostlist_lock);
+ list_del(&fc->list);
+ write_unlock_bh(&fcoe_hostlist_lock);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(fcoe_hostlist_remove);
+
+/**
+ * fcoe_init() - fcoe module loading initialization
+ *
+ * Returns 0 on success, negative on failure
+ */
+static int __init fcoe_init(void)
+{
+ unsigned int cpu;
+ int rc = 0;
+ struct fcoe_percpu_s *p;
+
+ INIT_LIST_HEAD(&fcoe_hostlist);
+ rwlock_init(&fcoe_hostlist_lock);
+
+ for_each_possible_cpu(cpu) {
+ p = &per_cpu(fcoe_percpu, cpu);
+ skb_queue_head_init(&p->fcoe_rx_list);
+ }
+
+ for_each_online_cpu(cpu)
+ fcoe_percpu_thread_create(cpu);
+
+ /* Initialize per CPU interrupt thread */
+ rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
+ if (rc)
+ goto out_free;
+
+ /* Setup link change notification */
+ fcoe_dev_setup();
+
+ setup_timer(&fcoe_timer, fcoe_watchdog, 0);
+
+ mod_timer(&fcoe_timer, jiffies + (10 * HZ));
+
+ fcoe_if_init();
+
+ return 0;
+
+out_free:
+ for_each_online_cpu(cpu) {
+ fcoe_percpu_thread_destroy(cpu);
+ }
+
+ return rc;
+}
+module_init(fcoe_init);
+
+/**
+ * fcoe_exit() - fcoe module unloading cleanup
+ *
+ * Returns 0 on success, negative on failure
+ */
+static void __exit fcoe_exit(void)
+{
+ unsigned int cpu;
+ struct fcoe_softc *fc, *tmp;
+
+ fcoe_dev_cleanup();
+
+ /* Stop the timer */
+ del_timer_sync(&fcoe_timer);
+
+ /* releases the associated fcoe hosts */
+ list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
+ fcoe_if_destroy(fc->real_dev);
+
+ unregister_hotcpu_notifier(&fcoe_cpu_notifier);
+
+ for_each_online_cpu(cpu) {
+ fcoe_percpu_thread_destroy(cpu);
+ }
+
+ /* detach from scsi transport */
+ fcoe_if_exit();
+}
+module_exit(fcoe_exit);
diff --git a/drivers/scsi/fcoe/fcoe.h b/drivers/scsi/fcoe/fcoe.h
new file mode 100644
index 0000000..a16a59d
--- /dev/null
+++ b/drivers/scsi/fcoe/fcoe.h
@@ -0,0 +1,99 @@
+/*
+ * Copyright(c) 2009 Intel Corporation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Maintained at www.Open-FCoE.org
+ */
+
+#ifndef _FCOE_H_
+#define _FCOE_H_
+
+#include <linux/skbuff.h>
+#include <linux/kthread.h>
+
+#define FCOE_MAX_QUEUE_DEPTH 256
+#define FCOE_LOW_QUEUE_DEPTH 32
+
+#define FCOE_WORD_TO_BYTE 4
+
+#define FCOE_VERSION "0.1"
+#define FCOE_NAME "fcoe"
+#define FCOE_VENDOR "Open-FCoE.org"
+
+#define FCOE_MAX_LUN 255
+#define FCOE_MAX_FCP_TARGET 256
+
+#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
+
+#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
+#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
+
+unsigned int fcoe_debug_logging;
+module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
+
+#define FCOE_LOGGING 0x01 /* General logging, not categorized */
+#define FCOE_NETDEV_LOGGING 0x02 /* Netdevice logging */
+
+#define FCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0);
+
+#define FCOE_DBG(fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_LOGGING, \
+ printk(KERN_INFO "fcoe: " fmt, ##args);)
+
+#define FCOE_NETDEV_DBG(netdev, fmt, args...) \
+ FCOE_CHECK_LOGGING(FCOE_NETDEV_LOGGING, \
+ printk(KERN_INFO "fcoe: %s" fmt, \
+ netdev->name, ##args);)
+
+/*
+ * this percpu struct for fcoe
+ */
+struct fcoe_percpu_s {
+ struct task_struct *thread;
+ struct sk_buff_head fcoe_rx_list;
+ struct page *crc_eof_page;
+ int crc_eof_offset;
+};
+
+/*
+ * the fcoe sw transport private data
+ */
+struct fcoe_softc {
+ struct list_head list;
+ struct net_device *real_dev;
+ struct net_device *phys_dev; /* device with ethtool_ops */
+ struct packet_type fcoe_packet_type;
+ struct packet_type fip_packet_type;
+ struct sk_buff_head fcoe_pending_queue;
+ u8 fcoe_pending_queue_active;
+ struct fcoe_ctlr ctlr;
+};
+
+#define fcoe_from_ctlr(fc) container_of(fc, struct fcoe_softc, ctlr)
+
+static inline struct net_device *fcoe_netdev(
+ const struct fc_lport *lp)
+{
+ return ((struct fcoe_softc *)lport_priv(lp))->real_dev;
+}
+
+#endif /* _FCOE_H_ */
diff --git a/drivers/scsi/fcoe/fcoe_sw.c b/drivers/scsi/fcoe/fcoe_sw.c
deleted file mode 100644
index aaf2326..0000000
--- a/drivers/scsi/fcoe/fcoe_sw.c
+++ /dev/null
@@ -1,474 +0,0 @@
-/*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Maintained at www.Open-FCoE.org
- */
-
-#include <linux/module.h>
-#include <linux/version.h>
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include <linux/spinlock.h>
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/if_vlan.h>
-
-#include <scsi/fc/fc_els.h>
-#include <scsi/fc/fc_encaps.h>
-#include <scsi/fc/fc_fs.h>
-#include <scsi/scsi_device.h>
-#include <scsi/scsi_host.h>
-#include <scsi/scsi_transport.h>
-#include <scsi/scsi_transport_fc.h>
-
-#include <scsi/libfc.h>
-#include <scsi/libfcoe.h>
-#include <scsi/fc_transport_fcoe.h>
-
-#define FCOE_SW_VERSION "0.1"
-#define FCOE_SW_NAME "fcoesw"
-#define FCOE_SW_VENDOR "Open-FCoE.org"
-
-#define FCOE_MAX_LUN 255
-#define FCOE_MAX_FCP_TARGET 256
-
-#define FCOE_MAX_OUTSTANDING_COMMANDS 1024
-
-#define FCOE_MIN_XID 0x0001 /* the min xid supported by fcoe_sw */
-#define FCOE_MAX_XID 0x07ef /* the max xid supported by fcoe_sw */
-
-static struct scsi_transport_template *scsi_transport_fcoe_sw;
-
-struct fc_function_template fcoe_sw_transport_function = {
- .show_host_node_name = 1,
- .show_host_port_name = 1,
- .show_host_supported_classes = 1,
- .show_host_supported_fc4s = 1,
- .show_host_active_fc4s = 1,
- .show_host_maxframe_size = 1,
-
- .show_host_port_id = 1,
- .show_host_supported_speeds = 1,
- .get_host_speed = fc_get_host_speed,
- .show_host_speed = 1,
- .show_host_port_type = 1,
- .get_host_port_state = fc_get_host_port_state,
- .show_host_port_state = 1,
- .show_host_symbolic_name = 1,
-
- .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
- .show_rport_maxframe_size = 1,
- .show_rport_supported_classes = 1,
-
- .show_host_fabric_name = 1,
- .show_starget_node_name = 1,
- .show_starget_port_name = 1,
- .show_starget_port_id = 1,
- .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
- .show_rport_dev_loss_tmo = 1,
- .get_fc_host_stats = fc_get_host_stats,
- .issue_fc_host_lip = fcoe_reset,
-
- .terminate_rport_io = fc_rport_terminate_io,
-};
-
-static struct scsi_host_template fcoe_sw_shost_template = {
- .module = THIS_MODULE,
- .name = "FCoE Driver",
- .proc_name = FCOE_SW_NAME,
- .queuecommand = fc_queuecommand,
- .eh_abort_handler = fc_eh_abort,
- .eh_device_reset_handler = fc_eh_device_reset,
- .eh_host_reset_handler = fc_eh_host_reset,
- .slave_alloc = fc_slave_alloc,
- .change_queue_depth = fc_change_queue_depth,
- .change_queue_type = fc_change_queue_type,
- .this_id = -1,
- .cmd_per_lun = 32,
- .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
- .use_clustering = ENABLE_CLUSTERING,
- .sg_tablesize = 4,
- .max_sectors = 0xffff,
-};
-
-/*
- * fcoe_sw_lport_config - sets up the fc_lport
- * @lp: ptr to the fc_lport
- * @shost: ptr to the parent scsi host
- *
- * Returns: 0 for success
- *
- */
-static int fcoe_sw_lport_config(struct fc_lport *lp)
-{
- int i = 0;
-
- lp->link_status = 0;
- lp->max_retry_count = 3;
- lp->e_d_tov = 2 * 1000; /* FC-FS default */
- lp->r_a_tov = 2 * 2 * 1000;
- lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
- FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
-
- /*
- * allocate per cpu stats block
- */
- for_each_online_cpu(i)
- lp->dev_stats[i] = kzalloc(sizeof(struct fcoe_dev_stats),
- GFP_KERNEL);
-
- /* lport fc_lport related configuration */
- fc_lport_config(lp);
-
- return 0;
-}
-
-/*
- * fcoe_sw_netdev_config - sets up fcoe_softc for lport and network
- * related properties
- * @lp : ptr to the fc_lport
- * @netdev : ptr to the associated netdevice struct
- *
- * Must be called after fcoe_sw_lport_config() as it will use lport mutex
- *
- * Returns : 0 for success
- *
- */
-static int fcoe_sw_netdev_config(struct fc_lport *lp, struct net_device *netdev)
-{
- u32 mfs;
- u64 wwnn, wwpn;
- struct fcoe_softc *fc;
-
- /* Setup lport private data to point to fcoe softc */
- fc = lport_priv(lp);
- fc->lp = lp;
- fc->real_dev = netdev;
- fc->phys_dev = netdev;
-
- /* Require support for get_pauseparam ethtool op. */
- if (netdev->priv_flags & IFF_802_1Q_VLAN)
- fc->phys_dev = VLAN_DEV_INFO(netdev)->real_dev;
-
- /* Do not support for bonding device */
- if ((fc->real_dev->priv_flags & IFF_MASTER_ALB) ||
- (fc->real_dev->priv_flags & IFF_SLAVE_INACTIVE) ||
- (fc->real_dev->priv_flags & IFF_MASTER_8023AD)) {
- return -EOPNOTSUPP;
- }
-
- /*
- * Determine max frame size based on underlying device and optional
- * user-configured limit. If the MFS is too low, fcoe_link_ok()
- * will return 0, so do this first.
- */
- mfs = fc->real_dev->mtu - (sizeof(struct fcoe_hdr) +
- sizeof(struct fcoe_crc_eof));
- fc_set_mfs(lp, mfs);
-
- lp->link_status = ~FC_PAUSE & ~FC_LINK_UP;
- if (!fcoe_link_ok(lp))
- lp->link_status |= FC_LINK_UP;
-
- /* offload features support */
- if (fc->real_dev->features & NETIF_F_SG)
- lp->sg_supp = 1;
-
-
- skb_queue_head_init(&fc->fcoe_pending_queue);
-
- /* setup Source Mac Address */
- memcpy(fc->ctl_src_addr, fc->real_dev->dev_addr,
- fc->real_dev->addr_len);
-
- wwnn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 1, 0);
- fc_set_wwnn(lp, wwnn);
- /* XXX - 3rd arg needs to be vlan id */
- wwpn = fcoe_wwn_from_mac(fc->real_dev->dev_addr, 2, 0);
- fc_set_wwpn(lp, wwpn);
-
- dev_set_promiscuity(fc->real_dev, 1);
-
- /*
- * setup the receive function from ethernet driver
- * on the ethertype for the given device
- */
- fc->fcoe_packet_type.func = fcoe_rcv;
- fc->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
- fc->fcoe_packet_type.dev = fc->real_dev;
- dev_add_pack(&fc->fcoe_packet_type);
-
- return 0;
-}
-
-/*
- * fcoe_sw_shost_config - sets up fc_lport->host
- * @lp : ptr to the fc_lport
- * @shost : ptr to the associated scsi host
- *
- * Must be called after fcoe_sw_lport_config) and fcoe_sw_netdev_config()
- *
- * Returns : 0 for success
- *
- */
-static int fcoe_sw_shost_config(struct fc_lport *lp, struct Scsi_Host *shost)
-{
- int rc = 0;
-
- /* lport scsi host config */
- lp->host = shost;
-
- lp->host->max_lun = FCOE_MAX_LUN;
- lp->host->max_id = FCOE_MAX_FCP_TARGET;
- lp->host->max_channel = 0;
- lp->host->transportt = scsi_transport_fcoe_sw;
-
- /* add the new host to the SCSI-ml */
- rc = scsi_add_host(lp->host, NULL);
- if (rc) {
- FC_DBG("fcoe_sw_shost_config:error on scsi_add_host\n");
- return rc;
- }
- sprintf(fc_host_symbolic_name(lp->host), "%s v%s over %s",
- FCOE_SW_NAME, FCOE_SW_VERSION,
- fcoe_netdev(lp)->name);
-
- return 0;
-}
-
-/*
- * fcoe_sw_em_config - allocates em for this lport
- * @lp: the port that em is to allocated for
- *
- * Returns : 0 on success
- */
-static inline int fcoe_sw_em_config(struct fc_lport *lp)
-{
- BUG_ON(lp->emp);
-
- lp->emp = fc_exch_mgr_alloc(lp, FC_CLASS_3,
- FCOE_MIN_XID, FCOE_MAX_XID);
- if (!lp->emp)
- return -ENOMEM;
-
- return 0;
-}
-
-/*
- * fcoe_sw_destroy - FCoE software HBA tear-down function
- * @netdev: ptr to the associated net_device
- *
- * Returns: 0 if link is OK for use by FCoE.
- */
-static int fcoe_sw_destroy(struct net_device *netdev)
-{
- int cpu;
- struct fc_lport *lp = NULL;
- struct fcoe_softc *fc;
-
- BUG_ON(!netdev);
-
- printk(KERN_DEBUG "fcoe_sw_destroy:interface on %s\n",
- netdev->name);
-
- lp = fcoe_hostlist_lookup(netdev);
- if (!lp)
- return -ENODEV;
-
- fc = fcoe_softc(lp);
-
- /* Remove the instance from fcoe's list */
- fcoe_hostlist_remove(lp);
-
- /* Don't listen for Ethernet packets anymore */
- dev_remove_pack(&fc->fcoe_packet_type);
-
- /* Cleanup the fc_lport */
- fc_lport_destroy(lp);
- fc_fcp_destroy(lp);
-
- /* Detach from the scsi-ml */
- fc_remove_host(lp->host);
- scsi_remove_host(lp->host);
-
- /* There are no more rports or I/O, free the EM */
- if (lp->emp)
- fc_exch_mgr_free(lp->emp);
-
- /* turn off promscuity */
- dev_set_promiscuity(fc->real_dev, -1);
-
- /* Free the per-CPU revieve threads */
- fcoe_percpu_clean(lp);
-
- /* Free existing skbs */
- fcoe_clean_pending_queue(lp);
-
- /* Free memory used by statistical counters */
- for_each_online_cpu(cpu)
- kfree(lp->dev_stats[cpu]);
-
- /* Release the net_device and Scsi_Host */
- dev_put(fc->real_dev);
- scsi_host_put(lp->host);
-
- return 0;
-}
-
-static struct libfc_function_template fcoe_sw_libfc_fcn_templ = {
- .frame_send = fcoe_xmit,
-};
-
-/*
- * fcoe_sw_create - this function creates the fcoe interface
- * @netdev: pointer the associated netdevice
- *
- * Creates fc_lport struct and scsi_host for lport, configures lport
- * and starts fabric login.
- *
- * Returns : 0 on success
- */
-static int fcoe_sw_create(struct net_device *netdev)
-{
- int rc;
- struct fc_lport *lp = NULL;
- struct fcoe_softc *fc;
- struct Scsi_Host *shost;
-
- BUG_ON(!netdev);
-
- printk(KERN_DEBUG "fcoe_sw_create:interface on %s\n",
- netdev->name);
-
- lp = fcoe_hostlist_lookup(netdev);
- if (lp)
- return -EEXIST;
-
- shost = fcoe_host_alloc(&fcoe_sw_shost_template,
- sizeof(struct fcoe_softc));
- if (!shost) {
- FC_DBG("Could not allocate host structure\n");
- return -ENOMEM;
- }
- lp = shost_priv(shost);
- fc = lport_priv(lp);
-
- /* configure fc_lport, e.g., em */
- rc = fcoe_sw_lport_config(lp);
- if (rc) {
- FC_DBG("Could not configure lport\n");
- goto out_host_put;
- }
-
- /* configure lport network properties */
- rc = fcoe_sw_netdev_config(lp, netdev);
- if (rc) {
- FC_DBG("Could not configure netdev for lport\n");
- goto out_host_put;
- }
-
- /* configure lport scsi host properties */
- rc = fcoe_sw_shost_config(lp, shost);
- if (rc) {
- FC_DBG("Could not configure shost for lport\n");
- goto out_host_put;
- }
-
- /* lport exch manager allocation */
- rc = fcoe_sw_em_config(lp);
- if (rc) {
- FC_DBG("Could not configure em for lport\n");
- goto out_host_put;
- }
-
- /* Initialize the library */
- rc = fcoe_libfc_config(lp, &fcoe_sw_libfc_fcn_templ);
- if (rc) {
- FC_DBG("Could not configure libfc for lport!\n");
- goto out_lp_destroy;
- }
-
- /* add to lports list */
- fcoe_hostlist_add(lp);
-
- lp->boot_time = jiffies;
-
- fc_fabric_login(lp);
-
- dev_hold(netdev);
-
- return rc;
-
-out_lp_destroy:
- fc_exch_mgr_free(lp->emp); /* Free the EM */
-out_host_put:
- scsi_host_put(lp->host);
- return rc;
-}
-
-/*
- * fcoe_sw_match - the fcoe sw transport match function
- *
- * Returns : false always
- */
-static bool fcoe_sw_match(struct net_device *netdev)
-{
- /* FIXME - for sw transport, always return false */
- return false;
-}
-
-/* the sw hba fcoe transport */
-struct fcoe_transport fcoe_sw_transport = {
- .name = "fcoesw",
- .create = fcoe_sw_create,
- .destroy = fcoe_sw_destroy,
- .match = fcoe_sw_match,
- .vendor = 0x0,
- .device = 0xffff,
-};
-
-/*
- * fcoe_sw_init - registers fcoe_sw_transport
- *
- * Returns : 0 on success
- */
-int __init fcoe_sw_init(void)
-{
- /* attach to scsi transport */
- scsi_transport_fcoe_sw =
- fc_attach_transport(&fcoe_sw_transport_function);
- if (!scsi_transport_fcoe_sw) {
- printk(KERN_ERR "fcoe_sw_init:fc_attach_transport() failed\n");
- return -ENODEV;
- }
- /* register sw transport */
- fcoe_transport_register(&fcoe_sw_transport);
- return 0;
-}
-
-/*
- * fcoe_sw_exit - unregisters fcoe_sw_transport
- *
- * Returns : 0 on success
- */
-int __exit fcoe_sw_exit(void)
-{
- /* dettach the transport */
- fc_release_transport(scsi_transport_fcoe_sw);
- fcoe_transport_unregister(&fcoe_sw_transport);
- return 0;
-}
diff --git a/drivers/scsi/fcoe/libfcoe.c b/drivers/scsi/fcoe/libfcoe.c
index 08cd9a6..cc3f2de 100644
--- a/drivers/scsi/fcoe/libfcoe.c
+++ b/drivers/scsi/fcoe/libfcoe.c
@@ -1,5 +1,6 @@
/*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2009 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -17,1145 +18,1277 @@
* Maintained at www.Open-FCoE.org
*/
+#include <linux/types.h>
#include <linux/module.h>
-#include <linux/version.h>
#include <linux/kernel.h>
+#include <linux/list.h>
#include <linux/spinlock.h>
-#include <linux/skbuff.h>
+#include <linux/timer.h>
#include <linux/netdevice.h>
#include <linux/etherdevice.h>
#include <linux/ethtool.h>
#include <linux/if_ether.h>
#include <linux/if_vlan.h>
-#include <linux/kthread.h>
-#include <linux/crc32.h>
-#include <linux/cpu.h>
-#include <linux/fs.h>
-#include <linux/sysfs.h>
-#include <linux/ctype.h>
-#include <scsi/scsi_tcq.h>
-#include <scsi/scsicam.h>
-#include <scsi/scsi_transport.h>
-#include <scsi/scsi_transport_fc.h>
+#include <linux/netdevice.h>
+#include <linux/errno.h>
+#include <linux/bitops.h>
+#include <linux/rtnetlink.h>
+#include <scsi/fc/fc_els.h>
+#include <scsi/fc/fc_fs.h>
+#include <scsi/fc/fc_fip.h>
#include <scsi/fc/fc_encaps.h>
+#include <scsi/fc/fc_fcoe.h>
#include <scsi/libfc.h>
-#include <scsi/fc_frame.h>
#include <scsi/libfcoe.h>
-#include <scsi/fc_transport_fcoe.h>
-static int debug_fcoe;
+MODULE_AUTHOR("Open-FCoE.org");
+MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs");
+MODULE_LICENSE("GPL v2");
+
+#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
+#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
-#define FCOE_MAX_QUEUE_DEPTH 256
+static void fcoe_ctlr_timeout(unsigned long);
+static void fcoe_ctlr_link_work(struct work_struct *);
+static void fcoe_ctlr_recv_work(struct work_struct *);
-/* destination address mode */
-#define FCOE_GW_ADDR_MODE 0x00
-#define FCOE_FCOUI_ADDR_MODE 0x01
+static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
-#define FCOE_WORD_TO_BYTE 4
+unsigned int libfcoe_debug_logging;
+module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
-MODULE_AUTHOR("Open-FCoE.org");
-MODULE_DESCRIPTION("FCoE");
-MODULE_LICENSE("GPL");
-
-/* fcoe host list */
-LIST_HEAD(fcoe_hostlist);
-DEFINE_RWLOCK(fcoe_hostlist_lock);
-DEFINE_TIMER(fcoe_timer, NULL, 0, 0);
-struct fcoe_percpu_s *fcoe_percpu[NR_CPUS];
-
-
-/* Function Prototyes */
-static int fcoe_check_wait_queue(struct fc_lport *);
-static void fcoe_insert_wait_queue_head(struct fc_lport *, struct sk_buff *);
-static void fcoe_insert_wait_queue(struct fc_lport *, struct sk_buff *);
-static void fcoe_recv_flogi(struct fcoe_softc *, struct fc_frame *, u8 *);
-#ifdef CONFIG_HOTPLUG_CPU
-static int fcoe_cpu_callback(struct notifier_block *, ulong, void *);
-#endif /* CONFIG_HOTPLUG_CPU */
-static int fcoe_device_notification(struct notifier_block *, ulong, void *);
-static void fcoe_dev_setup(void);
-static void fcoe_dev_cleanup(void);
-
-/* notification function from net device */
-static struct notifier_block fcoe_notifier = {
- .notifier_call = fcoe_device_notification,
-};
-
-
-#ifdef CONFIG_HOTPLUG_CPU
-static struct notifier_block fcoe_cpu_notifier = {
- .notifier_call = fcoe_cpu_callback,
-};
+#define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */
+#define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */
+
+#define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(libfcoe_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0);
+
+#define LIBFCOE_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \
+ printk(KERN_INFO "libfcoe: " fmt, ##args);)
+
+#define LIBFCOE_FIP_DBG(fmt, args...) \
+ LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \
+ printk(KERN_INFO "fip: " fmt, ##args);)
+
+/*
+ * Return non-zero if FCF fcoe_size has been validated.
+ */
+static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
+{
+ return (fcf->flags & FIP_FL_SOL) != 0;
+}
+
+/*
+ * Return non-zero if the FCF is usable.
+ */
+static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
+{
+ u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
+
+ return (fcf->flags & flags) == flags;
+}
/**
- * fcoe_create_percpu_data - creates the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will be created
- *
- * create percpu stats block, from cpu add notifier
- *
- * Returns: none
- **/
-static void fcoe_create_percpu_data(int cpu)
+ * fcoe_ctlr_init() - Initialize the FCoE Controller instance.
+ * @fip: FCoE controller.
+ */
+void fcoe_ctlr_init(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
-
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- if (lp->dev_stats[cpu] == NULL)
- lp->dev_stats[cpu] =
- kzalloc(sizeof(struct fcoe_dev_stats),
- GFP_KERNEL);
- }
- write_unlock_bh(&fcoe_hostlist_lock);
+ fip->state = FIP_ST_LINK_WAIT;
+ INIT_LIST_HEAD(&fip->fcfs);
+ spin_lock_init(&fip->lock);
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
+ INIT_WORK(&fip->link_work, fcoe_ctlr_link_work);
+ INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
+ skb_queue_head_init(&fip->fip_recv_list);
}
+EXPORT_SYMBOL(fcoe_ctlr_init);
/**
- * fcoe_destroy_percpu_data - destroys the associated cpu data
- * @cpu: index for the cpu where fcoe cpu data will destroyed
- *
- * destroy percpu stats block called by cpu add/remove notifier
+ * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller.
+ * @fip: FCoE controller.
*
- * Retuns: none
- **/
-static void fcoe_destroy_percpu_data(int cpu)
+ * Called with &fcoe_ctlr lock held.
+ */
+static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
- write_lock_bh(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- kfree(lp->dev_stats[cpu]);
- lp->dev_stats[cpu] = NULL;
+ fip->sel_fcf = NULL;
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ list_del(&fcf->list);
+ kfree(fcf);
}
- write_unlock_bh(&fcoe_hostlist_lock);
+ fip->fcf_count = 0;
+ fip->sel_time = 0;
}
/**
- * fcoe_cpu_callback - fcoe cpu hotplug event callback
- * @nfb: callback data block
- * @action: event triggering the callback
- * @hcpu: index for the cpu of this event
+ * fcoe_ctrl_destroy() - Disable and tear-down the FCoE controller.
+ * @fip: FCoE controller.
+ *
+ * This is called by FCoE drivers before freeing the &fcoe_ctlr.
*
- * this creates or destroys per cpu data for fcoe
+ * The receive handler will have been deleted before this to guarantee
+ * that no more recv_work will be scheduled.
*
- * Returns NOTIFY_OK always.
- **/
-static int fcoe_cpu_callback(struct notifier_block *nfb, unsigned long action,
- void *hcpu)
+ * The timer routine will simply return once we set FIP_ST_DISABLED.
+ * This guarantees that no further timeouts or work will be scheduled.
+ */
+void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
{
- unsigned int cpu = (unsigned long)hcpu;
-
- switch (action) {
- case CPU_ONLINE:
- fcoe_create_percpu_data(cpu);
- break;
- case CPU_DEAD:
- fcoe_destroy_percpu_data(cpu);
- break;
- default:
- break;
- }
- return NOTIFY_OK;
+ flush_work(&fip->recv_work);
+ spin_lock_bh(&fip->lock);
+ fip->state = FIP_ST_DISABLED;
+ fcoe_ctlr_reset_fcfs(fip);
+ spin_unlock_bh(&fip->lock);
+ del_timer_sync(&fip->timer);
+ flush_work(&fip->link_work);
}
-#endif /* CONFIG_HOTPLUG_CPU */
+EXPORT_SYMBOL(fcoe_ctlr_destroy);
/**
- * foce_rcv - this is the fcoe receive function called by NET_RX_SOFTIRQ
- * @skb: the receive skb
- * @dev: associated net device
- * @ptype: context
- * @odldev: last device
+ * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port.
+ * @fip: FCoE controller.
*
- * this function will receive the packet and build fc frame and pass it up
- *
- * Returns: 0 for success
- **/
-int fcoe_rcv(struct sk_buff *skb, struct net_device *dev,
- struct packet_type *ptype, struct net_device *olddev)
+ * Returns the maximum packet size including the FCoE header and trailer,
+ * but not including any Ethernet or VLAN headers.
+ */
+static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_rcv_info *fr;
- struct fcoe_softc *fc;
- struct fcoe_dev_stats *stats;
- u8 *data;
- struct fc_frame_header *fh;
- unsigned short oxid;
- int cpu_idx;
- struct fcoe_percpu_s *fps;
-
- fc = container_of(ptype, struct fcoe_softc, fcoe_packet_type);
- lp = fc->lp;
- if (unlikely(lp == NULL)) {
- FC_DBG("cannot find hba structure");
- goto err2;
- }
+ /*
+ * Determine the max FCoE frame size allowed, including
+ * FCoE header and trailer.
+ * Note: lp->mfs is currently the payload size, not the frame size.
+ */
+ return fip->lp->mfs + sizeof(struct fc_frame_header) +
+ sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
+}
- if (unlikely(debug_fcoe)) {
- FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p tail:%p "
- "end:%p sum:%d dev:%s", skb->len, skb->data_len,
- skb->head, skb->data, skb_tail_pointer(skb),
- skb_end_pointer(skb), skb->csum,
- skb->dev ? skb->dev->name : "<NULL>");
+/**
+ * fcoe_ctlr_solicit() - Send a solicitation.
+ * @fip: FCoE controller.
+ * @fcf: Destination FCF. If NULL, a multicast solicitation is sent.
+ */
+static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
+{
+ struct sk_buff *skb;
+ struct fip_sol {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct {
+ struct fip_mac_desc mac;
+ struct fip_wwn_desc wwnn;
+ struct fip_size_desc size;
+ } __attribute__((packed)) desc;
+ } __attribute__((packed)) *sol;
+ u32 fcoe_size;
+
+ skb = dev_alloc_skb(sizeof(*sol));
+ if (!skb)
+ return;
- }
+ sol = (struct fip_sol *)skb->data;
- /* check for FCOE packet type */
- if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
- FC_DBG("wrong FC type frame");
- goto err;
- }
- data = skb->data;
- data += sizeof(struct fcoe_hdr);
- fh = (struct fc_frame_header *)data;
- oxid = ntohs(fh->fh_ox_id);
-
- fr = fcoe_dev_from_skb(skb);
- fr->fr_dev = lp;
- fr->ptype = ptype;
- cpu_idx = 0;
-#ifdef CONFIG_SMP
- /*
- * The exchange ID are ANDed with num of online CPUs,
- * so that will have the least lock contention in
- * handling the exchange. if there is no thread
- * for a given idx then use first online cpu.
- */
- cpu_idx = oxid & (num_online_cpus() >> 1);
- if (fcoe_percpu[cpu_idx] == NULL)
- cpu_idx = first_cpu(cpu_online_map);
-#endif
- fps = fcoe_percpu[cpu_idx];
+ memset(sol, 0, sizeof(*sol));
+ memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
+ memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ sol->eth.h_proto = htons(ETH_P_FIP);
- spin_lock_bh(&fps->fcoe_rx_list.lock);
- __skb_queue_tail(&fps->fcoe_rx_list, skb);
- if (fps->fcoe_rx_list.qlen == 1)
- wake_up_process(fps->thread);
+ sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ sol->fip.fip_op = htons(FIP_OP_DISC);
+ sol->fip.fip_subcode = FIP_SC_SOL;
+ sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
+ sol->fip.fip_flags = htons(FIP_FL_FPMA);
- spin_unlock_bh(&fps->fcoe_rx_list.lock);
+ sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
+ memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
- return 0;
-err:
-#ifdef CONFIG_SMP
- stats = lp->dev_stats[smp_processor_id()];
-#else
- stats = lp->dev_stats[0];
-#endif
- if (stats)
- stats->ErrorFrames++;
-
-err2:
- kfree_skb(skb);
- return -1;
+ sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
+ sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
+ put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
+
+ fcoe_size = fcoe_ctlr_fcoe_size(fip);
+ sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
+ sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
+ sol->desc.size.fd_size = htons(fcoe_size);
+
+ skb_put(skb, sizeof(*sol));
+ skb->protocol = htons(ETH_P_802_3);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
+ fip->send(fip, skb);
+
+ if (!fcf)
+ fip->sol_time = jiffies;
}
-EXPORT_SYMBOL_GPL(fcoe_rcv);
/**
- * fcoe_start_io - pass to netdev to start xmit for fcoe
- * @skb: the skb to be xmitted
+ * fcoe_ctlr_link_up() - Start FCoE controller.
+ * @fip: FCoE controller.
*
- * Returns: 0 for success
- **/
-static inline int fcoe_start_io(struct sk_buff *skb)
+ * Called from the LLD when the network link is ready.
+ */
+void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
{
- int rc;
-
- skb_get(skb);
- rc = dev_queue_xmit(skb);
- if (rc != 0)
- return rc;
- kfree_skb(skb);
- return 0;
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
+ fip->last_link = 1;
+ fip->link = 1;
+ spin_unlock_bh(&fip->lock);
+ fc_linkup(fip->lp);
+ } else if (fip->state == FIP_ST_LINK_WAIT) {
+ fip->state = FIP_ST_AUTO;
+ fip->last_link = 1;
+ fip->link = 1;
+ spin_unlock_bh(&fip->lock);
+ LIBFCOE_FIP_DBG("%s", "setting AUTO mode.\n");
+ fc_linkup(fip->lp);
+ fcoe_ctlr_solicit(fip, NULL);
+ } else
+ spin_unlock_bh(&fip->lock);
}
+EXPORT_SYMBOL(fcoe_ctlr_link_up);
/**
- * fcoe_get_paged_crc_eof - in case we need alloc a page for crc_eof
- * @skb: the skb to be xmitted
- * @tlen: total len
+ * fcoe_ctlr_reset() - Reset FIP.
+ * @fip: FCoE controller.
+ * @new_state: FIP state to be entered.
*
- * Returns: 0 for success
- **/
-static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
+ * Returns non-zero if the link was up and now isn't.
+ */
+static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state)
{
- struct fcoe_percpu_s *fps;
- struct page *page;
- int cpu_idx;
-
- cpu_idx = get_cpu();
- fps = fcoe_percpu[cpu_idx];
- page = fps->crc_eof_page;
- if (!page) {
- page = alloc_page(GFP_ATOMIC);
- if (!page) {
- put_cpu();
- return -ENOMEM;
- }
- fps->crc_eof_page = page;
- WARN_ON(fps->crc_eof_offset != 0);
- }
-
- get_page(page);
- skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
- fps->crc_eof_offset, tlen);
- skb->len += tlen;
- skb->data_len += tlen;
- skb->truesize += tlen;
- fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
-
- if (fps->crc_eof_offset >= PAGE_SIZE) {
- fps->crc_eof_page = NULL;
- fps->crc_eof_offset = 0;
- put_page(page);
+ struct fc_lport *lp = fip->lp;
+ int link_dropped;
+
+ spin_lock_bh(&fip->lock);
+ fcoe_ctlr_reset_fcfs(fip);
+ del_timer(&fip->timer);
+ fip->state = new_state;
+ fip->ctlr_ka_time = 0;
+ fip->port_ka_time = 0;
+ fip->sol_time = 0;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fip->map_dest = 0;
+ fip->last_link = 0;
+ link_dropped = fip->link;
+ fip->link = 0;
+ spin_unlock_bh(&fip->lock);
+
+ if (link_dropped)
+ fc_linkdown(lp);
+
+ if (new_state == FIP_ST_ENABLED) {
+ fcoe_ctlr_solicit(fip, NULL);
+ fc_linkup(lp);
+ link_dropped = 0;
}
- put_cpu();
- return 0;
+ return link_dropped;
}
/**
- * fcoe_fc_crc - calculates FC CRC in this fcoe skb
- * @fp: the fc_frame containg data to be checksummed
+ * fcoe_ctlr_link_down() - Stop FCoE controller.
+ * @fip: FCoE controller.
*
- * This uses crc32() to calculate the crc for fc frame
- * Return : 32 bit crc
+ * Returns non-zero if the link was up and now isn't.
*
- **/
-u32 fcoe_fc_crc(struct fc_frame *fp)
+ * Called from the LLD when the network link is not ready.
+ * There may be multiple calls while the link is down.
+ */
+int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
{
- struct sk_buff *skb = fp_skb(fp);
- struct skb_frag_struct *frag;
- unsigned char *data;
- unsigned long off, len, clen;
- u32 crc;
- unsigned i;
-
- crc = crc32(~0, skb->data, skb_headlen(skb));
-
- for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
- frag = &skb_shinfo(skb)->frags[i];
- off = frag->page_offset;
- len = frag->size;
- while (len > 0) {
- clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
- data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
- KM_SKB_DATA_SOFTIRQ);
- crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
- kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
- off += clen;
- len -= clen;
- }
- }
- return crc;
+ return fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT);
}
-EXPORT_SYMBOL_GPL(fcoe_fc_crc);
+EXPORT_SYMBOL(fcoe_ctlr_link_down);
/**
- * fcoe_xmit - FCoE frame transmit function
- * @lp: the associated local port
- * @fp: the fc_frame to be transmitted
+ * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF.
+ * @fip: FCoE controller.
+ * @ports: 0 for controller keep-alive, 1 for port keep-alive.
+ * @sa: source MAC address.
*
- * Return : 0 for success
+ * A controller keep-alive is sent every fka_period (typically 8 seconds).
+ * The source MAC is the native MAC address.
*
- **/
-int fcoe_xmit(struct fc_lport *lp, struct fc_frame *fp)
+ * A port keep-alive is sent every 90 seconds while logged in.
+ * The source MAC is the assigned mapped source address.
+ * The destination is the FCF's F-port.
+ */
+static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, int ports, u8 *sa)
{
- int wlen, rc = 0;
- u32 crc;
- struct ethhdr *eh;
- struct fcoe_crc_eof *cp;
struct sk_buff *skb;
- struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
- unsigned int hlen; /* header length implies the version */
- unsigned int tlen; /* trailer length */
- unsigned int elen; /* eth header, may include vlan */
- int flogi_in_progress = 0;
- struct fcoe_softc *fc;
- u8 sof, eof;
- struct fcoe_hdr *hp;
-
- WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
-
- fc = fcoe_softc(lp);
- /*
- * if it is a flogi then we need to learn gw-addr
- * and my own fcid
- */
- fh = fc_frame_header_get(fp);
- if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ)) {
- if (fc_frame_payload_op(fp) == ELS_FLOGI) {
- fc->flogi_oxid = ntohs(fh->fh_ox_id);
- fc->address_mode = FCOE_FCOUI_ADDR_MODE;
- fc->flogi_progress = 1;
- flogi_in_progress = 1;
- } else if (fc->flogi_progress && ntoh24(fh->fh_s_id) != 0) {
- /*
- * Here we must've gotten an SID by accepting an FLOGI
- * from a point-to-point connection. Switch to using
- * the source mac based on the SID. The destination
- * MAC in this case would have been set by receving the
- * FLOGI.
- */
- fc_fcoe_set_mac(fc->data_src_addr, fh->fh_s_id);
- fc->flogi_progress = 0;
- }
- }
+ struct fip_kal {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_mac_desc mac;
+ } __attribute__((packed)) *kal;
+ struct fip_vn_desc *vn;
+ u32 len;
+ struct fc_lport *lp;
+ struct fcoe_fcf *fcf;
- skb = fp_skb(fp);
- sof = fr_sof(fp);
- eof = fr_eof(fp);
-
- elen = (fc->real_dev->priv_flags & IFF_802_1Q_VLAN) ?
- sizeof(struct vlan_ethhdr) : sizeof(struct ethhdr);
- hlen = sizeof(struct fcoe_hdr);
- tlen = sizeof(struct fcoe_crc_eof);
- wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
-
- /* crc offload */
- skb->ip_summed = CHECKSUM_NONE;
- crc = fcoe_fc_crc(fp);
-
- /* copy fc crc and eof to the skb buff */
- if (skb_is_nonlinear(skb)) {
- skb_frag_t *frag;
- if (fcoe_get_paged_crc_eof(skb, tlen)) {
- kfree(skb);
- return -ENOMEM;
- }
- frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
- cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
- + frag->page_offset;
- } else {
- cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
- }
+ fcf = fip->sel_fcf;
+ lp = fip->lp;
+ if (!fcf || !fc_host_port_id(lp->host))
+ return;
- memset(cp, 0, sizeof(*cp));
- cp->fcoe_eof = eof;
- cp->fcoe_crc32 = cpu_to_le32(~crc);
+ len = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr);
+ BUG_ON(len < sizeof(*kal) + sizeof(*vn));
+ skb = dev_alloc_skb(len);
+ if (!skb)
+ return;
- if (skb_is_nonlinear(skb)) {
- kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
- cp = NULL;
+ kal = (struct fip_kal *)skb->data;
+ memset(kal, 0, len);
+ memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ memcpy(kal->eth.h_source, sa, ETH_ALEN);
+ kal->eth.h_proto = htons(ETH_P_FIP);
+
+ kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ kal->fip.fip_op = htons(FIP_OP_CTRL);
+ kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
+ kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
+ ports * sizeof(*vn)) / FIP_BPW);
+ kal->fip.fip_flags = htons(FIP_FL_FPMA);
+
+ kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
+ kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
+ memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
+
+ if (ports) {
+ vn = (struct fip_vn_desc *)(kal + 1);
+ vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
+ vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
+ memcpy(vn->fd_mac, fip->data_src_addr, ETH_ALEN);
+ hton24(vn->fd_fc_id, fc_host_port_id(lp->host));
+ put_unaligned_be64(lp->wwpn, &vn->fd_wwpn);
}
- /* adjust skb netowrk/transport offsets to match mac/fcoe/fc */
- skb_push(skb, elen + hlen);
+ skb_put(skb, len);
+ skb->protocol = htons(ETH_P_802_3);
skb_reset_mac_header(skb);
skb_reset_network_header(skb);
- skb->mac_len = elen;
- skb->protocol = htons(ETH_P_802_3);
- skb->dev = fc->real_dev;
-
- /* fill up mac and fcoe headers */
- eh = eth_hdr(skb);
- eh->h_proto = htons(ETH_P_FCOE);
- if (fc->address_mode == FCOE_FCOUI_ADDR_MODE)
- fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
- else
- /* insert GW address */
- memcpy(eh->h_dest, fc->dest_addr, ETH_ALEN);
-
- if (unlikely(flogi_in_progress))
- memcpy(eh->h_source, fc->ctl_src_addr, ETH_ALEN);
- else
- memcpy(eh->h_source, fc->data_src_addr, ETH_ALEN);
-
- hp = (struct fcoe_hdr *)(eh + 1);
- memset(hp, 0, sizeof(*hp));
- if (FC_FCOE_VER)
- FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
- hp->fcoe_sof = sof;
-
- /* update tx stats: regardless if LLD fails */
- stats = lp->dev_stats[smp_processor_id()];
- if (stats) {
- stats->TxFrames++;
- stats->TxWords += wlen;
- }
-
- /* send down to lld */
- fr_dev(fp) = lp;
- if (fc->fcoe_pending_queue.qlen)
- rc = fcoe_check_wait_queue(lp);
-
- if (rc == 0)
- rc = fcoe_start_io(skb);
-
- if (rc) {
- fcoe_insert_wait_queue(lp, skb);
- if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
- fc_pause(lp);
- }
-
- return 0;
+ fip->send(fip, skb);
}
-EXPORT_SYMBOL_GPL(fcoe_xmit);
-/*
- * fcoe_percpu_receive_thread - recv thread per cpu
- * @arg: ptr to the fcoe per cpu struct
+/**
+ * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it.
+ * @fip: FCoE controller.
+ * @dtype: FIP descriptor type for the frame.
+ * @skb: FCoE ELS frame including FC header but no FCoE headers.
+ *
+ * Returns non-zero error code on failure.
*
- * Return: 0 for success
+ * The caller must check that the length is a multiple of 4.
*
+ * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
+ * Headroom includes the FIP encapsulation description, FIP header, and
+ * Ethernet header. The tailroom is for the FIP MAC descriptor.
*/
-int fcoe_percpu_receive_thread(void *arg)
+static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip,
+ u8 dtype, struct sk_buff *skb)
{
- struct fcoe_percpu_s *p = arg;
- u32 fr_len;
- unsigned int hlen;
- unsigned int tlen;
- struct fc_lport *lp;
- struct fcoe_rcv_info *fr;
- struct fcoe_dev_stats *stats;
- struct fc_frame_header *fh;
- struct sk_buff *skb;
- struct fcoe_crc_eof *cp;
- struct fc_frame *fp;
- u8 *mac = NULL;
- struct fcoe_softc *fc;
- struct fcoe_hdr *hp;
-
- set_user_nice(current, 19);
-
- while (!kthread_should_stop()) {
-
- spin_lock_bh(&p->fcoe_rx_list.lock);
- while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
- set_current_state(TASK_INTERRUPTIBLE);
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- schedule();
- set_current_state(TASK_RUNNING);
- if (kthread_should_stop())
- return 0;
- spin_lock_bh(&p->fcoe_rx_list.lock);
- }
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- fr = fcoe_dev_from_skb(skb);
- lp = fr->fr_dev;
- if (unlikely(lp == NULL)) {
- FC_DBG("invalid HBA Structure");
- kfree_skb(skb);
- continue;
- }
-
- stats = lp->dev_stats[smp_processor_id()];
-
- if (unlikely(debug_fcoe)) {
- FC_DBG("skb_info: len:%d data_len:%d head:%p data:%p "
- "tail:%p end:%p sum:%d dev:%s",
- skb->len, skb->data_len,
- skb->head, skb->data, skb_tail_pointer(skb),
- skb_end_pointer(skb), skb->csum,
- skb->dev ? skb->dev->name : "<NULL>");
- }
-
- /*
- * Save source MAC address before discarding header.
- */
- fc = lport_priv(lp);
- if (unlikely(fc->flogi_progress))
- mac = eth_hdr(skb)->h_source;
+ struct fip_encaps_head {
+ struct ethhdr eth;
+ struct fip_header fip;
+ struct fip_encaps encaps;
+ } __attribute__((packed)) *cap;
+ struct fip_mac_desc *mac;
+ struct fcoe_fcf *fcf;
+ size_t dlen;
+
+ fcf = fip->sel_fcf;
+ if (!fcf)
+ return -ENODEV;
+ dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
+ cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
+
+ memset(cap, 0, sizeof(*cap));
+ memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
+ memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
+ cap->eth.h_proto = htons(ETH_P_FIP);
+
+ cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
+ cap->fip.fip_op = htons(FIP_OP_LS);
+ cap->fip.fip_subcode = FIP_SC_REQ;
+ cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW);
+ cap->fip.fip_flags = htons(FIP_FL_FPMA);
+
+ cap->encaps.fd_desc.fip_dtype = dtype;
+ cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
+
+ mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
+ memset(mac, 0, sizeof(mac));
+ mac->fd_desc.fip_dtype = FIP_DT_MAC;
+ mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
+ if (dtype != ELS_FLOGI)
+ memcpy(mac->fd_mac, fip->data_src_addr, ETH_ALEN);
- if (skb_is_nonlinear(skb))
- skb_linearize(skb); /* not ideal */
-
- /*
- * Check the header and pull it off.
- */
- hlen = sizeof(struct fcoe_hdr);
- hp = (struct fcoe_hdr *)skb->data;
- if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
- if (stats) {
- if (stats->ErrorFrames < 5)
- FC_DBG("unknown FCoE version %x",
- FC_FCOE_DECAPS_VER(hp));
- stats->ErrorFrames++;
- }
- kfree_skb(skb);
- continue;
- }
- skb_pull(skb, sizeof(struct fcoe_hdr));
- tlen = sizeof(struct fcoe_crc_eof);
- fr_len = skb->len - tlen;
- skb_trim(skb, fr_len);
-
- if (unlikely(fr_len > skb->len)) {
- if (stats) {
- if (stats->ErrorFrames < 5)
- FC_DBG("length error fr_len 0x%x "
- "skb->len 0x%x", fr_len,
- skb->len);
- stats->ErrorFrames++;
- }
- kfree_skb(skb);
- continue;
- }
- if (stats) {
- stats->RxFrames++;
- stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
- }
-
- fp = (struct fc_frame *)skb;
- cp = (struct fcoe_crc_eof *)(skb->data + fr_len);
- fc_frame_init(fp);
- fr_eof(fp) = cp->fcoe_eof;
- fr_sof(fp) = hp->fcoe_sof;
- fr_dev(fp) = lp;
-
- /*
- * We only check CRC if no offload is available and if it is
- * it's solicited data, in which case, the FCP layer would
- * check it during the copy.
- */
- if (lp->crc_offload)
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
- else
- fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
-
- fh = fc_frame_header_get(fp);
- if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
- fh->fh_type == FC_TYPE_FCP) {
- fc_exch_recv(lp, lp->emp, fp);
- continue;
- }
- if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
- if (le32_to_cpu(cp->fcoe_crc32) !=
- ~crc32(~0, skb->data, fr_len)) {
- if (debug_fcoe || stats->InvalidCRCCount < 5)
- printk(KERN_WARNING "fcoe: dropping "
- "frame with CRC error\n");
- stats->InvalidCRCCount++;
- stats->ErrorFrames++;
- fc_frame_free(fp);
- continue;
- }
- fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
- }
- /* non flogi and non data exchanges are handled here */
- if (unlikely(fc->flogi_progress))
- fcoe_recv_flogi(fc, fp, mac);
- fc_exch_recv(lp, lp->emp, fp);
- }
+ skb->protocol = htons(ETH_P_802_3);
+ skb_reset_mac_header(skb);
+ skb_reset_network_header(skb);
return 0;
}
/**
- * fcoe_recv_flogi - flogi receive function
- * @fc: associated fcoe_softc
- * @fp: the recieved frame
- * @sa: the source address of this flogi
+ * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
+ * @fip: FCoE controller.
+ * @skb: FCoE ELS frame including FC header but no FCoE headers.
*
- * This is responsible to parse the flogi response and sets the corresponding
- * mac address for the initiator, eitehr OUI based or GW based.
+ * Returns a non-zero error code if the frame should not be sent.
+ * Returns zero if the caller should send the frame with FCoE encapsulation.
*
- * Returns: none
- **/
-static void fcoe_recv_flogi(struct fcoe_softc *fc, struct fc_frame *fp, u8 *sa)
+ * The caller must check that the length is a multiple of 4.
+ * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
+ */
+int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
struct fc_frame_header *fh;
+ u16 old_xid;
u8 op;
- fh = fc_frame_header_get(fp);
- if (fh->fh_type != FC_TYPE_ELS)
- return;
- op = fc_frame_payload_op(fp);
- if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
- fc->flogi_oxid == ntohs(fh->fh_ox_id)) {
- /*
- * FLOGI accepted.
- * If the src mac addr is FC_OUI-based, then we mark the
- * address_mode flag to use FC_OUI-based Ethernet DA.
- * Otherwise we use the FCoE gateway addr
- */
- if (!compare_ether_addr(sa, (u8[6]) FC_FCOE_FLOGI_MAC)) {
- fc->address_mode = FCOE_FCOUI_ADDR_MODE;
- } else {
- memcpy(fc->dest_addr, sa, ETH_ALEN);
- fc->address_mode = FCOE_GW_ADDR_MODE;
+ if (fip->state == FIP_ST_NON_FIP)
+ return 0;
+
+ fh = (struct fc_frame_header *)skb->data;
+ op = *(u8 *)(fh + 1);
+
+ switch (op) {
+ case ELS_FLOGI:
+ old_xid = fip->flogi_oxid;
+ fip->flogi_oxid = ntohs(fh->fh_ox_id);
+ if (fip->state == FIP_ST_AUTO) {
+ if (old_xid == FC_XID_UNKNOWN)
+ fip->flogi_count = 0;
+ fip->flogi_count++;
+ if (fip->flogi_count < 3)
+ goto drop;
+ fip->map_dest = 1;
+ return 0;
}
-
- fc_fcoe_set_mac(fc->data_src_addr, fh->fh_d_id);
- fc->flogi_progress = 0;
- } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+ op = FIP_DT_FLOGI;
+ break;
+ case ELS_FDISC:
+ if (ntoh24(fh->fh_s_id))
+ return 0;
+ op = FIP_DT_FDISC;
+ break;
+ case ELS_LOGO:
+ if (fip->state != FIP_ST_ENABLED)
+ return 0;
+ if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
+ return 0;
+ op = FIP_DT_LOGO;
+ break;
+ case ELS_LS_ACC:
+ if (fip->flogi_oxid == FC_XID_UNKNOWN)
+ return 0;
+ if (!ntoh24(fh->fh_s_id))
+ return 0;
+ if (fip->state == FIP_ST_AUTO)
+ return 0;
/*
- * Save source MAC for point-to-point responses.
+ * Here we must've gotten an SID by accepting an FLOGI
+ * from a point-to-point connection. Switch to using
+ * the source mac based on the SID. The destination
+ * MAC in this case would have been set by receving the
+ * FLOGI.
*/
- memcpy(fc->dest_addr, sa, ETH_ALEN);
- fc->address_mode = FCOE_GW_ADDR_MODE;
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fc_fcoe_set_mac(fip->data_src_addr, fh->fh_s_id);
+ return 0;
+ default:
+ if (fip->state != FIP_ST_ENABLED)
+ goto drop;
+ return 0;
}
+ if (fcoe_ctlr_encaps(fip, op, skb))
+ goto drop;
+ fip->send(fip, skb);
+ return -EINPROGRESS;
+drop:
+ kfree_skb(skb);
+ return -EINVAL;
}
+EXPORT_SYMBOL(fcoe_ctlr_els_send);
-/**
- * fcoe_watchdog - fcoe timer callback
- * @vp:
+/*
+ * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller.
+ * @fip: FCoE controller.
+ *
+ * Called with lock held.
*
- * This checks the pending queue length for fcoe and put fcoe to be paused state
- * if the FCOE_MAX_QUEUE_DEPTH is reached. This is done for all fc_lport on the
- * fcoe_hostlist.
+ * An FCF is considered old if we have missed three advertisements.
+ * That is, there have been no valid advertisement from it for three
+ * times its keep-alive period including fuzz.
*
- * Returns: 0 for success
- **/
-void fcoe_watchdog(ulong vp)
+ * In addition, determine the time when an FCF selection can occur.
+ */
+static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
{
- struct fc_lport *lp;
- struct fcoe_softc *fc;
- int paused = 0;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- lp = fc->lp;
- if (lp) {
- if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
- paused = 1;
- if (fcoe_check_wait_queue(lp) < FCOE_MAX_QUEUE_DEPTH) {
- if (paused)
- fc_unpause(lp);
- }
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *next;
+ unsigned long sel_time = 0;
+
+ list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
+ if (time_after(jiffies, fcf->time + fcf->fka_period * 3 +
+ msecs_to_jiffies(FIP_FCF_FUZZ * 3))) {
+ if (fip->sel_fcf == fcf)
+ fip->sel_fcf = NULL;
+ list_del(&fcf->list);
+ WARN_ON(!fip->fcf_count);
+ fip->fcf_count--;
+ kfree(fcf);
+ } else if (fcoe_ctlr_mtu_valid(fcf) &&
+ (!sel_time || time_before(sel_time, fcf->time))) {
+ sel_time = fcf->time;
}
}
- read_unlock(&fcoe_hostlist_lock);
-
- fcoe_timer.expires = jiffies + (1 * HZ);
- add_timer(&fcoe_timer);
+ if (sel_time) {
+ sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ fip->sel_time = sel_time;
+ if (time_before(sel_time, fip->timer.expires))
+ mod_timer(&fip->timer, sel_time);
+ } else {
+ fip->sel_time = 0;
+ }
}
-
/**
- * fcoe_check_wait_queue - put the skb into fcoe pending xmit queue
- * @lp: the fc_port for this skb
- * @skb: the associated skb to be xmitted
- *
- * This empties the wait_queue, dequeue the head of the wait_queue queue
- * and calls fcoe_start_io() for each packet, if all skb have been
- * transmitted, return 0 if a error occurs, then restore wait_queue and
- * try again later.
+ * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry.
+ * @skb: received FIP advertisement frame
+ * @fcf: resulting FCF entry.
*
- * The wait_queue is used when the skb transmit fails. skb will go
- * in the wait_queue which will be emptied by the time function OR
- * by the next skb transmit.
- *
- * Returns: 0 for success
- **/
-static int fcoe_check_wait_queue(struct fc_lport *lp)
+ * Returns zero on a valid parsed advertisement,
+ * otherwise returns non zero value.
+ */
+static int fcoe_ctlr_parse_adv(struct sk_buff *skb, struct fcoe_fcf *fcf)
{
- int rc, unpause = 0;
- int paused = 0;
- struct sk_buff *skb;
- struct fcoe_softc *fc;
-
- fc = fcoe_softc(lp);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
-
- /*
- * is this interface paused?
- */
- if (fc->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
- paused = 1;
- if (fc->fcoe_pending_queue.qlen) {
- while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- rc = fcoe_start_io(skb);
- if (rc) {
- fcoe_insert_wait_queue_head(lp, skb);
- return rc;
+ struct fip_header *fiph;
+ struct fip_desc *desc = NULL;
+ struct fip_wwn_desc *wwn;
+ struct fip_fab_desc *fab;
+ struct fip_fka_desc *fka;
+ unsigned long t;
+ size_t rlen;
+ size_t dlen;
+
+ memset(fcf, 0, sizeof(*fcf));
+ fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
+
+ fiph = (struct fip_header *)skb->data;
+ fcf->flags = ntohs(fiph->fip_flags);
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ return -EINVAL;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ return -EINVAL;
+ switch (desc->fip_dtype) {
+ case FIP_DT_PRI:
+ if (dlen != sizeof(struct fip_pri_desc))
+ goto len_err;
+ fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
+ break;
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(fcf->fcf_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ if (!is_valid_ether_addr(fcf->fcf_mac)) {
+ LIBFCOE_FIP_DBG("Invalid MAC address "
+ "in FIP adv\n");
+ return -EINVAL;
}
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ break;
+ case FIP_DT_NAME:
+ if (dlen != sizeof(struct fip_wwn_desc))
+ goto len_err;
+ wwn = (struct fip_wwn_desc *)desc;
+ fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
+ break;
+ case FIP_DT_FAB:
+ if (dlen != sizeof(struct fip_fab_desc))
+ goto len_err;
+ fab = (struct fip_fab_desc *)desc;
+ fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
+ fcf->vfid = ntohs(fab->fd_vfid);
+ fcf->fc_map = ntoh24(fab->fd_map);
+ break;
+ case FIP_DT_FKA:
+ if (dlen != sizeof(struct fip_fka_desc))
+ goto len_err;
+ fka = (struct fip_fka_desc *)desc;
+ t = ntohl(fka->fd_fka_period);
+ if (t >= FCOE_CTLR_MIN_FKA)
+ fcf->fka_period = msecs_to_jiffies(t);
+ break;
+ case FIP_DT_MAP_OUI:
+ case FIP_DT_FCOE_SIZE:
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ default:
+ LIBFCOE_FIP_DBG("unexpected descriptor type %x "
+ "in FIP adv\n", desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ return -EINVAL;
+ continue;
}
- if (fc->fcoe_pending_queue.qlen < FCOE_MAX_QUEUE_DEPTH)
- unpause = 1;
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
}
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- if ((unpause) && (paused))
- fc_unpause(lp);
- return fc->fcoe_pending_queue.qlen;
+ if (!fcf->fc_map || (fcf->fc_map & 0x10000))
+ return -EINVAL;
+ if (!fcf->switch_name || !fcf->fabric_name)
+ return -EINVAL;
+ return 0;
+
+len_err:
+ LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+ return -EINVAL;
}
/**
- * fcoe_insert_wait_queue_head - puts skb to fcoe pending queue head
- * @lp: the fc_port for this skb
- * @skb: the associated skb to be xmitted
- *
- * Returns: none
- **/
-static void fcoe_insert_wait_queue_head(struct fc_lport *lp,
- struct sk_buff *skb)
+ * fcoe_ctlr_recv_adv() - Handle an incoming advertisement.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
+ */
+static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- struct fcoe_softc *fc;
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf new;
+ struct fcoe_fcf *found;
+ unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
+ int first = 0;
+ int mtu_valid;
+
+ if (fcoe_ctlr_parse_adv(skb, &new))
+ return;
- fc = fcoe_softc(lp);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- __skb_queue_head(&fc->fcoe_pending_queue, skb);
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
-}
+ spin_lock_bh(&fip->lock);
+ first = list_empty(&fip->fcfs);
+ found = NULL;
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ if (fcf->switch_name == new.switch_name &&
+ fcf->fabric_name == new.fabric_name &&
+ fcf->fc_map == new.fc_map &&
+ compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) {
+ found = fcf;
+ break;
+ }
+ }
+ if (!found) {
+ if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
+ goto out;
-/**
- * fcoe_insert_wait_queue - put the skb into fcoe pending queue tail
- * @lp: the fc_port for this skb
- * @skb: the associated skb to be xmitted
- *
- * Returns: none
- **/
-static void fcoe_insert_wait_queue(struct fc_lport *lp,
- struct sk_buff *skb)
-{
- struct fcoe_softc *fc;
+ fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
+ if (!fcf)
+ goto out;
- fc = fcoe_softc(lp);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- __skb_queue_tail(&fc->fcoe_pending_queue, skb);
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
-}
+ fip->fcf_count++;
+ memcpy(fcf, &new, sizeof(new));
+ list_add(&fcf->list, &fip->fcfs);
+ } else {
+ /*
+ * Flags in advertisements are ignored once the FCF is
+ * selected. Flags in unsolicited advertisements are
+ * ignored after a usable solicited advertisement
+ * has been received.
+ */
+ if (fcf == fip->sel_fcf) {
+ fip->ctlr_ka_time -= fcf->fka_period;
+ fip->ctlr_ka_time += new.fka_period;
+ if (time_before(fip->ctlr_ka_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->ctlr_ka_time);
+ } else if (!fcoe_ctlr_fcf_usable(fcf))
+ fcf->flags = new.flags;
+ fcf->fka_period = new.fka_period;
+ memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
+ }
+ mtu_valid = fcoe_ctlr_mtu_valid(fcf);
+ fcf->time = jiffies;
+ if (!found) {
+ LIBFCOE_FIP_DBG("New FCF for fab %llx map %x val %d\n",
+ fcf->fabric_name, fcf->fc_map, mtu_valid);
+ }
-/**
- * fcoe_dev_setup - setup link change notification interface
- *
- **/
-static void fcoe_dev_setup(void)
-{
/*
- * here setup a interface specific wd time to
- * monitor the link state
+ * If this advertisement is not solicited and our max receive size
+ * hasn't been verified, send a solicited advertisement.
*/
- register_netdevice_notifier(&fcoe_notifier);
-}
+ if (!mtu_valid)
+ fcoe_ctlr_solicit(fip, fcf);
-/**
- * fcoe_dev_setup - cleanup link change notification interface
- **/
-static void fcoe_dev_cleanup(void)
-{
- unregister_netdevice_notifier(&fcoe_notifier);
+ /*
+ * If its been a while since we did a solicit, and this is
+ * the first advertisement we've received, do a multicast
+ * solicitation to gather as many advertisements as we can
+ * before selection occurs.
+ */
+ if (first && time_after(jiffies, fip->sol_time + sol_tov))
+ fcoe_ctlr_solicit(fip, NULL);
+
+ /*
+ * If this is the first validated FCF, note the time and
+ * set a timer to trigger selection.
+ */
+ if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) {
+ fip->sel_time = jiffies +
+ msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ if (!timer_pending(&fip->timer) ||
+ time_before(fip->sel_time, fip->timer.expires))
+ mod_timer(&fip->timer, fip->sel_time);
+ }
+out:
+ spin_unlock_bh(&fip->lock);
}
/**
- * fcoe_device_notification - netdev event notification callback
- * @notifier: context of the notification
- * @event: type of event
- * @ptr: fixed array for output parsed ifname
- *
- * This function is called by the ethernet driver in case of link change event
- *
- * Returns: 0 for success
- **/
-static int fcoe_device_notification(struct notifier_block *notifier,
- ulong event, void *ptr)
+ * fcoe_ctlr_recv_els() - Handle an incoming FIP-encapsulated ELS frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
+ */
+static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- struct fc_lport *lp = NULL;
- struct net_device *real_dev = ptr;
- struct fcoe_softc *fc;
+ struct fc_lport *lp = fip->lp;
+ struct fip_header *fiph;
+ struct fc_frame *fp;
+ struct fc_frame_header *fh = NULL;
+ struct fip_desc *desc;
+ struct fip_encaps *els;
struct fcoe_dev_stats *stats;
- u16 new_status;
- u32 mfs;
- int rc = NOTIFY_OK;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- if (fc->real_dev == real_dev) {
- lp = fc->lp;
+ enum fip_desc_type els_dtype = 0;
+ u8 els_op;
+ u8 sub;
+ u8 granted_mac[ETH_ALEN] = { 0 };
+ size_t els_len = 0;
+ size_t rlen;
+ size_t dlen;
+
+ fiph = (struct fip_header *)skb->data;
+ sub = fiph->fip_subcode;
+ if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
+ goto drop;
+
+ rlen = ntohs(fiph->fip_dl_len) * 4;
+ if (rlen + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ desc = (struct fip_desc *)(fiph + 1);
+ while (rlen > 0) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen < sizeof(*desc) || dlen > rlen)
+ goto drop;
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ if (dlen != sizeof(struct fip_mac_desc))
+ goto len_err;
+ memcpy(granted_mac,
+ ((struct fip_mac_desc *)desc)->fd_mac,
+ ETH_ALEN);
+ if (!is_valid_ether_addr(granted_mac)) {
+ LIBFCOE_FIP_DBG("Invalid MAC address "
+ "in FIP ELS\n");
+ goto drop;
+ }
break;
+ case FIP_DT_FLOGI:
+ case FIP_DT_FDISC:
+ case FIP_DT_LOGO:
+ case FIP_DT_ELP:
+ if (fh)
+ goto drop;
+ if (dlen < sizeof(*els) + sizeof(*fh) + 1)
+ goto len_err;
+ els_len = dlen - sizeof(*els);
+ els = (struct fip_encaps *)desc;
+ fh = (struct fc_frame_header *)(els + 1);
+ els_dtype = desc->fip_dtype;
+ break;
+ default:
+ LIBFCOE_FIP_DBG("unexpected descriptor type %x "
+ "in FIP adv\n", desc->fip_dtype);
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ goto drop;
+ continue;
}
- }
- read_unlock(&fcoe_hostlist_lock);
- if (lp == NULL) {
- rc = NOTIFY_DONE;
- goto out;
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
}
- new_status = lp->link_status;
- switch (event) {
- case NETDEV_DOWN:
- case NETDEV_GOING_DOWN:
- new_status &= ~FC_LINK_UP;
- break;
- case NETDEV_UP:
- case NETDEV_CHANGE:
- new_status &= ~FC_LINK_UP;
- if (!fcoe_link_ok(lp))
- new_status |= FC_LINK_UP;
- break;
- case NETDEV_CHANGEMTU:
- mfs = fc->real_dev->mtu -
- (sizeof(struct fcoe_hdr) +
- sizeof(struct fcoe_crc_eof));
- if (fc->user_mfs && fc->user_mfs < mfs)
- mfs = fc->user_mfs;
- if (mfs >= FC_MIN_MAX_FRAME)
- fc_set_mfs(lp, mfs);
- new_status &= ~FC_LINK_UP;
- if (!fcoe_link_ok(lp))
- new_status |= FC_LINK_UP;
- break;
- case NETDEV_REGISTER:
- break;
- default:
- FC_DBG("unknown event %ld call", event);
- }
- if (lp->link_status != new_status) {
- if ((new_status & FC_LINK_UP) == FC_LINK_UP)
- fc_linkup(lp);
- else {
- stats = lp->dev_stats[smp_processor_id()];
- if (stats)
- stats->LinkFailureCount++;
- fc_linkdown(lp);
- fcoe_clean_pending_queue(lp);
- }
+ if (!fh)
+ goto drop;
+ els_op = *(u8 *)(fh + 1);
+
+ if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP &&
+ fip->flogi_oxid == ntohs(fh->fh_ox_id) &&
+ els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) {
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ fip->update_mac(fip, fip->data_src_addr, granted_mac);
+ memcpy(fip->data_src_addr, granted_mac, ETH_ALEN);
}
-out:
- return rc;
+
+ /*
+ * Convert skb into an fc_frame containing only the ELS.
+ */
+ skb_pull(skb, (u8 *)fh - skb->data);
+ skb_trim(skb, els_len);
+ fp = (struct fc_frame *)skb;
+ fc_frame_init(fp);
+ fr_sof(fp) = FC_SOF_I3;
+ fr_eof(fp) = FC_EOF_T;
+ fr_dev(fp) = lp;
+
+ stats = fc_lport_get_stats(lp);
+ stats->RxFrames++;
+ stats->RxWords += skb->len / FIP_BPW;
+
+ fc_exch_recv(lp, lp->emp, fp);
+ return;
+
+len_err:
+ LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n",
+ desc->fip_dtype, dlen);
+drop:
+ kfree_skb(skb);
}
/**
- * fcoe_if_to_netdev - parse a name buffer to get netdev
- * @ifname: fixed array for output parsed ifname
- * @buffer: incoming buffer to be copied
+ * fcoe_ctlr_recv_els() - Handle an incoming link reset frame.
+ * @fip: FCoE controller.
+ * @fh: Received FIP header.
*
- * Returns: NULL or ptr to netdeive
- **/
-static struct net_device *fcoe_if_to_netdev(const char *buffer)
+ * There may be multiple VN_Port descriptors.
+ * The overall length has already been checked.
+ */
+static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
+ struct fip_header *fh)
{
- char *cp;
- char ifname[IFNAMSIZ + 2];
-
- if (buffer) {
- strlcpy(ifname, buffer, IFNAMSIZ);
- cp = ifname + strlen(ifname);
- while (--cp >= ifname && *cp == '\n')
- *cp = '\0';
- return dev_get_by_name(ifname);
+ struct fip_desc *desc;
+ struct fip_mac_desc *mp;
+ struct fip_wwn_desc *wp;
+ struct fip_vn_desc *vp;
+ size_t rlen;
+ size_t dlen;
+ struct fcoe_fcf *fcf = fip->sel_fcf;
+ struct fc_lport *lp = fip->lp;
+ u32 desc_mask;
+
+ LIBFCOE_FIP_DBG("Clear Virtual Link received\n");
+ if (!fcf)
+ return;
+ if (!fcf || !fc_host_port_id(lp->host))
+ return;
+
+ /*
+ * mask of required descriptors. Validating each one clears its bit.
+ */
+ desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID);
+
+ rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
+ desc = (struct fip_desc *)(fh + 1);
+ while (rlen >= sizeof(*desc)) {
+ dlen = desc->fip_dlen * FIP_BPW;
+ if (dlen > rlen)
+ return;
+ switch (desc->fip_dtype) {
+ case FIP_DT_MAC:
+ mp = (struct fip_mac_desc *)desc;
+ if (dlen < sizeof(*mp))
+ return;
+ if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
+ return;
+ desc_mask &= ~BIT(FIP_DT_MAC);
+ break;
+ case FIP_DT_NAME:
+ wp = (struct fip_wwn_desc *)desc;
+ if (dlen < sizeof(*wp))
+ return;
+ if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
+ return;
+ desc_mask &= ~BIT(FIP_DT_NAME);
+ break;
+ case FIP_DT_VN_ID:
+ vp = (struct fip_vn_desc *)desc;
+ if (dlen < sizeof(*vp))
+ return;
+ if (compare_ether_addr(vp->fd_mac,
+ fip->data_src_addr) == 0 &&
+ get_unaligned_be64(&vp->fd_wwpn) == lp->wwpn &&
+ ntoh24(vp->fd_fc_id) == fc_host_port_id(lp->host))
+ desc_mask &= ~BIT(FIP_DT_VN_ID);
+ break;
+ default:
+ /* standard says ignore unknown descriptors >= 128 */
+ if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
+ return;
+ break;
+ }
+ desc = (struct fip_desc *)((char *)desc + dlen);
+ rlen -= dlen;
+ }
+
+ /*
+ * reset only if all required descriptors were present and valid.
+ */
+ if (desc_mask) {
+ LIBFCOE_FIP_DBG("missing descriptors mask %x\n", desc_mask);
+ } else {
+ LIBFCOE_FIP_DBG("performing Clear Virtual Link\n");
+ fcoe_ctlr_reset(fip, FIP_ST_ENABLED);
}
- return NULL;
}
/**
- * fcoe_destroy- handles the destroy from sysfs
- * @buffer: expcted to be a eth if name
- * @kp: associated kernel param
+ * fcoe_ctlr_recv() - Receive a FIP frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*
- * Returns: 0 for success
- **/
-static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
+ * This is called from NET_RX_SOFTIRQ.
+ */
+void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- int rc;
- struct net_device *netdev;
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
- /* look for existing lport */
- if (!fcoe_hostlist_lookup(netdev)) {
- rc = -ENODEV;
- goto out_putdev;
- }
- /* pass to transport */
- rc = fcoe_transport_release(netdev);
- if (rc) {
- printk(KERN_ERR "fcoe: fcoe_transport_release(%s) failed\n",
- netdev->name);
- rc = -EIO;
- goto out_putdev;
- }
- rc = 0;
-out_putdev:
- dev_put(netdev);
-out_nodev:
- return rc;
+ spin_lock_bh(&fip->fip_recv_list.lock);
+ __skb_queue_tail(&fip->fip_recv_list, skb);
+ spin_unlock_bh(&fip->fip_recv_list.lock);
+ schedule_work(&fip->recv_work);
}
+EXPORT_SYMBOL(fcoe_ctlr_recv);
/**
- * fcoe_create - handles the create call from sysfs
- * @buffer: expcted to be a eth if name
- * @kp: associated kernel param
+ * fcoe_ctlr_recv_handler() - Receive a FIP frame.
+ * @fip: FCoE controller.
+ * @skb: Received FIP packet.
*
- * Returns: 0 for success
- **/
-static int fcoe_create(const char *buffer, struct kernel_param *kp)
+ * Returns non-zero if the frame is dropped.
+ */
+static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
{
- int rc;
- struct net_device *netdev;
-
- netdev = fcoe_if_to_netdev(buffer);
- if (!netdev) {
- rc = -ENODEV;
- goto out_nodev;
- }
- /* look for existing lport */
- if (fcoe_hostlist_lookup(netdev)) {
- rc = -EEXIST;
- goto out_putdev;
+ struct fip_header *fiph;
+ struct ethhdr *eh;
+ enum fip_state state;
+ u16 op;
+ u8 sub;
+
+ if (skb_linearize(skb))
+ goto drop;
+ if (skb->len < sizeof(*fiph))
+ goto drop;
+ eh = eth_hdr(skb);
+ if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
+ compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS))
+ goto drop;
+ fiph = (struct fip_header *)skb->data;
+ op = ntohs(fiph->fip_op);
+ sub = fiph->fip_subcode;
+
+ if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
+ goto drop;
+ if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
+ goto drop;
+
+ spin_lock_bh(&fip->lock);
+ state = fip->state;
+ if (state == FIP_ST_AUTO) {
+ fip->map_dest = 0;
+ fip->state = FIP_ST_ENABLED;
+ state = FIP_ST_ENABLED;
+ LIBFCOE_FIP_DBG("Using FIP mode\n");
}
+ spin_unlock_bh(&fip->lock);
+ if (state != FIP_ST_ENABLED)
+ goto drop;
- /* pass to transport */
- rc = fcoe_transport_attach(netdev);
- if (rc) {
- printk(KERN_ERR "fcoe: fcoe_transport_attach(%s) failed\n",
- netdev->name);
- rc = -EIO;
- goto out_putdev;
+ if (op == FIP_OP_LS) {
+ fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
+ return 0;
}
- rc = 0;
-out_putdev:
- dev_put(netdev);
-out_nodev:
- return rc;
+ if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
+ fcoe_ctlr_recv_adv(fip, skb);
+ else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
+ fcoe_ctlr_recv_clr_vlink(fip, fiph);
+ kfree_skb(skb);
+ return 0;
+drop:
+ kfree_skb(skb);
+ return -1;
}
-module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(create, "string");
-MODULE_PARM_DESC(create, "Create fcoe port using net device passed in.");
-module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
-__MODULE_PARM_TYPE(destroy, "string");
-MODULE_PARM_DESC(destroy, "Destroy fcoe port");
-
-/*
- * fcoe_link_ok - check if link is ok for the fc_lport
- * @lp: ptr to the fc_lport
- *
- * Any permanently-disqualifying conditions have been previously checked.
- * This also updates the speed setting, which may change with link for 100/1000.
- *
- * This function should probably be checking for PAUSE support at some point
- * in the future. Currently Per-priority-pause is not determinable using
- * ethtool, so we shouldn't be restrictive until that problem is resolved.
+/**
+ * fcoe_ctlr_select() - Select the best FCF, if possible.
+ * @fip: FCoE controller.
*
- * Returns: 0 if link is OK for use by FCoE.
+ * If there are conflicting advertisements, no FCF can be chosen.
*
+ * Called with lock held.
*/
-int fcoe_link_ok(struct fc_lport *lp)
+static void fcoe_ctlr_select(struct fcoe_ctlr *fip)
{
- struct fcoe_softc *fc = fcoe_softc(lp);
- struct net_device *dev = fc->real_dev;
- struct ethtool_cmd ecmd = { ETHTOOL_GSET };
- int rc = 0;
-
- if ((dev->flags & IFF_UP) && netif_carrier_ok(dev)) {
- dev = fc->phys_dev;
- if (dev->ethtool_ops->get_settings) {
- dev->ethtool_ops->get_settings(dev, &ecmd);
- lp->link_supported_speeds &=
- ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
- if (ecmd.supported & (SUPPORTED_1000baseT_Half |
- SUPPORTED_1000baseT_Full))
- lp->link_supported_speeds |= FC_PORTSPEED_1GBIT;
- if (ecmd.supported & SUPPORTED_10000baseT_Full)
- lp->link_supported_speeds |=
- FC_PORTSPEED_10GBIT;
- if (ecmd.speed == SPEED_1000)
- lp->link_speed = FC_PORTSPEED_1GBIT;
- if (ecmd.speed == SPEED_10000)
- lp->link_speed = FC_PORTSPEED_10GBIT;
+ struct fcoe_fcf *fcf;
+ struct fcoe_fcf *best = NULL;
+
+ list_for_each_entry(fcf, &fip->fcfs, list) {
+ LIBFCOE_FIP_DBG("consider FCF for fab %llx VFID %d map %x "
+ "val %d\n", fcf->fabric_name, fcf->vfid,
+ fcf->fc_map, fcoe_ctlr_mtu_valid(fcf));
+ if (!fcoe_ctlr_fcf_usable(fcf)) {
+ LIBFCOE_FIP_DBG("FCF for fab %llx map %x %svalid "
+ "%savailable\n", fcf->fabric_name,
+ fcf->fc_map, (fcf->flags & FIP_FL_SOL)
+ ? "" : "in", (fcf->flags & FIP_FL_AVAIL)
+ ? "" : "un");
+ continue;
}
- } else
- rc = -1;
-
- return rc;
-}
-EXPORT_SYMBOL_GPL(fcoe_link_ok);
-
-/*
- * fcoe_percpu_clean - frees skb of the corresponding lport from the per
- * cpu queue.
- * @lp: the fc_lport
- */
-void fcoe_percpu_clean(struct fc_lport *lp)
-{
- int idx;
- struct fcoe_percpu_s *pp;
- struct fcoe_rcv_info *fr;
- struct sk_buff_head *list;
- struct sk_buff *skb, *next;
- struct sk_buff *head;
-
- for (idx = 0; idx < NR_CPUS; idx++) {
- if (fcoe_percpu[idx]) {
- pp = fcoe_percpu[idx];
- spin_lock_bh(&pp->fcoe_rx_list.lock);
- list = &pp->fcoe_rx_list;
- head = list->next;
- for (skb = head; skb != (struct sk_buff *)list;
- skb = next) {
- next = skb->next;
- fr = fcoe_dev_from_skb(skb);
- if (fr->fr_dev == lp) {
- __skb_unlink(skb, list);
- kfree_skb(skb);
- }
- }
- spin_unlock_bh(&pp->fcoe_rx_list.lock);
+ if (!best) {
+ best = fcf;
+ continue;
+ }
+ if (fcf->fabric_name != best->fabric_name ||
+ fcf->vfid != best->vfid ||
+ fcf->fc_map != best->fc_map) {
+ LIBFCOE_FIP_DBG("Conflicting fabric, VFID, "
+ "or FC-MAP\n");
+ return;
}
+ if (fcf->pri < best->pri)
+ best = fcf;
}
+ fip->sel_fcf = best;
}
-EXPORT_SYMBOL_GPL(fcoe_percpu_clean);
/**
- * fcoe_clean_pending_queue - dequeue skb and free it
- * @lp: the corresponding fc_lport
+ * fcoe_ctlr_timeout() - FIP timer function.
+ * @arg: &fcoe_ctlr pointer.
*
- * Returns: none
- **/
-void fcoe_clean_pending_queue(struct fc_lport *lp)
+ * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives.
+ */
+static void fcoe_ctlr_timeout(unsigned long arg)
{
- struct fcoe_softc *fc = lport_priv(lp);
- struct sk_buff *skb;
+ struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
+ struct fcoe_fcf *sel;
+ struct fcoe_fcf *fcf;
+ unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ DECLARE_MAC_BUF(buf);
+ u8 send_ctlr_ka;
+ u8 send_port_ka;
+
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_DISABLED) {
+ spin_unlock_bh(&fip->lock);
+ return;
+ }
+
+ fcf = fip->sel_fcf;
+ fcoe_ctlr_age_fcfs(fip);
+
+ sel = fip->sel_fcf;
+ if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) {
+ fcoe_ctlr_select(fip);
+ sel = fip->sel_fcf;
+ fip->sel_time = 0;
+ }
+
+ if (sel != fcf) {
+ fcf = sel; /* the old FCF may have been freed */
+ if (sel) {
+ printk(KERN_INFO "libfcoe: host%d: FIP selected "
+ "Fibre-Channel Forwarder MAC %s\n",
+ fip->lp->host->host_no,
+ print_mac(buf, sel->fcf_mac));
+ memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
+ fip->port_ka_time = jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ fip->ctlr_ka_time = jiffies + sel->fka_period;
+ fip->link = 1;
+ } else {
+ printk(KERN_NOTICE "libfcoe: host%d: "
+ "FIP Fibre-Channel Forwarder timed out. "
+ "Starting FCF discovery.\n",
+ fip->lp->host->host_no);
+ fip->link = 0;
+ }
+ schedule_work(&fip->link_work);
+ }
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
- while ((skb = __skb_dequeue(&fc->fcoe_pending_queue)) != NULL) {
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
- kfree_skb(skb);
- spin_lock_bh(&fc->fcoe_pending_queue.lock);
+ send_ctlr_ka = 0;
+ send_port_ka = 0;
+ if (sel) {
+ if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
+ fip->ctlr_ka_time = jiffies + sel->fka_period;
+ send_ctlr_ka = 1;
+ }
+ if (time_after(next_timer, fip->ctlr_ka_time))
+ next_timer = fip->ctlr_ka_time;
+
+ if (time_after_eq(jiffies, fip->port_ka_time)) {
+ fip->port_ka_time += jiffies +
+ msecs_to_jiffies(FIP_VN_KA_PERIOD);
+ send_port_ka = 1;
+ }
+ if (time_after(next_timer, fip->port_ka_time))
+ next_timer = fip->port_ka_time;
+ mod_timer(&fip->timer, next_timer);
+ } else if (fip->sel_time) {
+ next_timer = fip->sel_time +
+ msecs_to_jiffies(FCOE_CTLR_START_DELAY);
+ mod_timer(&fip->timer, next_timer);
}
- spin_unlock_bh(&fc->fcoe_pending_queue.lock);
+ spin_unlock_bh(&fip->lock);
+
+ if (send_ctlr_ka)
+ fcoe_ctlr_send_keep_alive(fip, 0, fip->ctl_src_addr);
+ if (send_port_ka)
+ fcoe_ctlr_send_keep_alive(fip, 1, fip->data_src_addr);
}
-EXPORT_SYMBOL_GPL(fcoe_clean_pending_queue);
/**
- * libfc_host_alloc - allocate a Scsi_Host with room for the fc_lport
- * @sht: ptr to the scsi host templ
- * @priv_size: size of private data after fc_lport
+ * fcoe_ctlr_link_work() - worker thread function for link changes.
+ * @work: pointer to link_work member inside &fcoe_ctlr.
*
- * Returns: ptr to Scsi_Host
- * TODO - to libfc?
+ * See if the link status has changed and if so, report it.
+ *
+ * This is here because fc_linkup() and fc_linkdown() must not
+ * be called from the timer directly, since they use a mutex.
*/
-static inline struct Scsi_Host *libfc_host_alloc(
- struct scsi_host_template *sht, int priv_size)
+static void fcoe_ctlr_link_work(struct work_struct *work)
{
- return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
+ struct fcoe_ctlr *fip;
+ int link;
+ int last_link;
+
+ fip = container_of(work, struct fcoe_ctlr, link_work);
+ spin_lock_bh(&fip->lock);
+ last_link = fip->last_link;
+ link = fip->link;
+ fip->last_link = link;
+ spin_unlock_bh(&fip->lock);
+
+ if (last_link != link) {
+ if (link)
+ fc_linkup(fip->lp);
+ else
+ fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT);
+ }
}
/**
- * fcoe_host_alloc - allocate a Scsi_Host with room for the fcoe_softc
- * @sht: ptr to the scsi host templ
- * @priv_size: size of private data after fc_lport
- *
- * Returns: ptr to Scsi_Host
+ * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames.
+ * @recv_work: pointer to recv_work member inside &fcoe_ctlr.
*/
-struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *sht, int priv_size)
+static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
{
- return libfc_host_alloc(sht, sizeof(struct fcoe_softc) + priv_size);
+ struct fcoe_ctlr *fip;
+ struct sk_buff *skb;
+
+ fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
+ spin_lock_bh(&fip->fip_recv_list.lock);
+ while ((skb = __skb_dequeue(&fip->fip_recv_list))) {
+ spin_unlock_bh(&fip->fip_recv_list.lock);
+ fcoe_ctlr_recv_handler(fip, skb);
+ spin_lock_bh(&fip->fip_recv_list.lock);
+ }
+ spin_unlock_bh(&fip->fip_recv_list.lock);
}
-EXPORT_SYMBOL_GPL(fcoe_host_alloc);
-/*
- * fcoe_reset - resets the fcoe
- * @shost: shost the reset is from
+/**
+ * fcoe_ctlr_recv_flogi() - snoop Pre-FIP receipt of FLOGI response or request.
+ * @fip: FCoE controller.
+ * @fp: FC frame.
+ * @sa: Ethernet source MAC address from received FCoE frame.
*
- * Returns: always 0
+ * Snoop potential response to FLOGI or even incoming FLOGI.
+ *
+ * The caller has checked that we are waiting for login as indicated
+ * by fip->flogi_oxid != FC_XID_UNKNOWN.
+ *
+ * The caller is responsible for freeing the frame.
+ *
+ * Return non-zero if the frame should not be delivered to libfc.
*/
-int fcoe_reset(struct Scsi_Host *shost)
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_frame *fp, u8 *sa)
{
- struct fc_lport *lport = shost_priv(shost);
- fc_lport_reset(lport);
+ struct fc_frame_header *fh;
+ u8 op;
+ u8 mac[ETH_ALEN];
+
+ fh = fc_frame_header_get(fp);
+ if (fh->fh_type != FC_TYPE_ELS)
+ return 0;
+
+ op = fc_frame_payload_op(fp);
+ if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
+ fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
+
+ spin_lock_bh(&fip->lock);
+ if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
+ spin_unlock_bh(&fip->lock);
+ return -EINVAL;
+ }
+ fip->state = FIP_ST_NON_FIP;
+ LIBFCOE_FIP_DBG("received FLOGI LS_ACC using non-FIP mode\n");
+
+ /*
+ * FLOGI accepted.
+ * If the src mac addr is FC_OUI-based, then we mark the
+ * address_mode flag to use FC_OUI-based Ethernet DA.
+ * Otherwise we use the FCoE gateway addr
+ */
+ if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
+ fip->map_dest = 1;
+ } else {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ }
+ fip->flogi_oxid = FC_XID_UNKNOWN;
+ memcpy(mac, fip->data_src_addr, ETH_ALEN);
+ fc_fcoe_set_mac(fip->data_src_addr, fh->fh_d_id);
+ spin_unlock_bh(&fip->lock);
+
+ fip->update_mac(fip, mac, fip->data_src_addr);
+ } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
+ /*
+ * Save source MAC for point-to-point responses.
+ */
+ spin_lock_bh(&fip->lock);
+ if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
+ memcpy(fip->dest_addr, sa, ETH_ALEN);
+ fip->map_dest = 0;
+ if (fip->state == FIP_ST_NON_FIP)
+ LIBFCOE_FIP_DBG("received FLOGI REQ, "
+ "using non-FIP mode\n");
+ fip->state = FIP_ST_NON_FIP;
+ }
+ spin_unlock_bh(&fip->lock);
+ }
return 0;
}
-EXPORT_SYMBOL_GPL(fcoe_reset);
+EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
-/*
- * fcoe_wwn_from_mac - converts 48-bit IEEE MAC address to 64-bit FC WWN.
+/**
+ * fcoe_wwn_from_mac() - Converts 48-bit IEEE MAC address to 64-bit FC WWN.
* @mac: mac address
* @scheme: check port
* @port: port indicator for converting
@@ -1194,92 +1327,14 @@ u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
return wwn;
}
EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
-/*
- * fcoe_hostlist_lookup_softc - find the corresponding lport by a given device
- * @device: this is currently ptr to net_device
- *
- * Returns: NULL or the located fcoe_softc
- */
-static struct fcoe_softc *fcoe_hostlist_lookup_softc(
- const struct net_device *dev)
-{
- struct fcoe_softc *fc;
-
- read_lock(&fcoe_hostlist_lock);
- list_for_each_entry(fc, &fcoe_hostlist, list) {
- if (fc->real_dev == dev) {
- read_unlock(&fcoe_hostlist_lock);
- return fc;
- }
- }
- read_unlock(&fcoe_hostlist_lock);
- return NULL;
-}
-
-/*
- * fcoe_hostlist_lookup - find the corresponding lport by netdev
- * @netdev: ptr to net_device
- *
- * Returns: 0 for success
- */
-struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(netdev);
-
- return (fc) ? fc->lp : NULL;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_lookup);
-
-/*
- * fcoe_hostlist_add - add a lport to lports list
- * @lp: ptr to the fc_lport to badded
- *
- * Returns: 0 for success
- */
-int fcoe_hostlist_add(const struct fc_lport *lp)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
- if (!fc) {
- fc = fcoe_softc(lp);
- write_lock_bh(&fcoe_hostlist_lock);
- list_add_tail(&fc->list, &fcoe_hostlist);
- write_unlock_bh(&fcoe_hostlist_lock);
- }
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_add);
-
-/*
- * fcoe_hostlist_remove - remove a lport from lports list
- * @lp: ptr to the fc_lport to badded
- *
- * Returns: 0 for success
- */
-int fcoe_hostlist_remove(const struct fc_lport *lp)
-{
- struct fcoe_softc *fc;
-
- fc = fcoe_hostlist_lookup_softc(fcoe_netdev(lp));
- BUG_ON(!fc);
- write_lock_bh(&fcoe_hostlist_lock);
- list_del(&fc->list);
- write_unlock_bh(&fcoe_hostlist_lock);
-
- return 0;
-}
-EXPORT_SYMBOL_GPL(fcoe_hostlist_remove);
/**
- * fcoe_libfc_config - sets up libfc related properties for lport
+ * fcoe_libfc_config() - sets up libfc related properties for lport
* @lp: ptr to the fc_lport
* @tt: libfc function template
*
* Returns : 0 for success
- **/
+ */
int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
{
/* Set the function pointers set by the LLDD */
@@ -1295,124 +1350,3 @@ int fcoe_libfc_config(struct fc_lport *lp, struct libfc_function_template *tt)
return 0;
}
EXPORT_SYMBOL_GPL(fcoe_libfc_config);
-
-/**
- * fcoe_init - fcoe module loading initialization
- *
- * Initialization routine
- * 1. Will create fc transport software structure
- * 2. initialize the link list of port information structure
- *
- * Returns 0 on success, negative on failure
- **/
-static int __init fcoe_init(void)
-{
- int cpu;
- struct fcoe_percpu_s *p;
-
-
- INIT_LIST_HEAD(&fcoe_hostlist);
- rwlock_init(&fcoe_hostlist_lock);
-
-#ifdef CONFIG_HOTPLUG_CPU
- register_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
-
- /*
- * initialize per CPU interrupt thread
- */
- for_each_online_cpu(cpu) {
- p = kzalloc(sizeof(struct fcoe_percpu_s), GFP_KERNEL);
- if (p) {
- p->thread = kthread_create(fcoe_percpu_receive_thread,
- (void *)p,
- "fcoethread/%d", cpu);
-
- /*
- * if there is no error then bind the thread to the cpu
- * initialize the semaphore and skb queue head
- */
- if (likely(!IS_ERR(p->thread))) {
- p->cpu = cpu;
- fcoe_percpu[cpu] = p;
- skb_queue_head_init(&p->fcoe_rx_list);
- kthread_bind(p->thread, cpu);
- wake_up_process(p->thread);
- } else {
- fcoe_percpu[cpu] = NULL;
- kfree(p);
-
- }
- }
- }
-
- /*
- * setup link change notification
- */
- fcoe_dev_setup();
-
- init_timer(&fcoe_timer);
- fcoe_timer.data = 0;
- fcoe_timer.function = fcoe_watchdog;
- fcoe_timer.expires = (jiffies + (10 * HZ));
- add_timer(&fcoe_timer);
-
- /* initiatlize the fcoe transport */
- fcoe_transport_init();
-
- fcoe_sw_init();
-
- return 0;
-}
-module_init(fcoe_init);
-
-/**
- * fcoe_exit - fcoe module unloading cleanup
- *
- * Returns 0 on success, negative on failure
- **/
-static void __exit fcoe_exit(void)
-{
- u32 idx;
- struct fcoe_softc *fc, *tmp;
- struct fcoe_percpu_s *p;
- struct sk_buff *skb;
-
- /*
- * Stop all call back interfaces
- */
-#ifdef CONFIG_HOTPLUG_CPU
- unregister_cpu_notifier(&fcoe_cpu_notifier);
-#endif /* CONFIG_HOTPLUG_CPU */
- fcoe_dev_cleanup();
-
- /*
- * stop timer
- */
- del_timer_sync(&fcoe_timer);
-
- /* releases the assocaited fcoe transport for each lport */
- list_for_each_entry_safe(fc, tmp, &fcoe_hostlist, list)
- fcoe_transport_release(fc->real_dev);
-
- for (idx = 0; idx < NR_CPUS; idx++) {
- if (fcoe_percpu[idx]) {
- kthread_stop(fcoe_percpu[idx]->thread);
- p = fcoe_percpu[idx];
- spin_lock_bh(&p->fcoe_rx_list.lock);
- while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
- kfree_skb(skb);
- spin_unlock_bh(&p->fcoe_rx_list.lock);
- if (fcoe_percpu[idx]->crc_eof_page)
- put_page(fcoe_percpu[idx]->crc_eof_page);
- kfree(fcoe_percpu[idx]);
- }
- }
-
- /* remove sw trasnport */
- fcoe_sw_exit();
-
- /* detach the transport */
- fcoe_transport_exit();
-}
-module_exit(fcoe_exit);
diff --git a/drivers/scsi/libfc/fc_disc.c b/drivers/scsi/libfc/fc_disc.c
index cfe4828..6e2f6f5 100644
--- a/drivers/scsi/libfc/fc_disc.c
+++ b/drivers/scsi/libfc/fc_disc.c
@@ -24,6 +24,14 @@
* also handles RSCN events and re-discovery if necessary.
*/
+/*
+ * DISC LOCKING
+ *
+ * The disc mutex is can be locked when acquiring rport locks, but may not
+ * be held when acquiring the lport lock. Refer to fc_lport.c for more
+ * details.
+ */
+
#include <linux/timer.h>
#include <linux/err.h>
#include <asm/unaligned.h>
@@ -37,98 +45,78 @@
#define FC_DISC_DELAY 3
-static int fc_disc_debug;
-
-#define FC_DEBUG_DISC(fmt...) \
- do { \
- if (fc_disc_debug) \
- FC_DBG(fmt); \
- } while (0)
-
-struct fc_disc {
- unsigned char retry_count;
- unsigned char delay;
- unsigned char pending;
- unsigned char requested;
- unsigned short seq_count;
- unsigned char buf_len;
- enum fc_disc_event event;
-
- void (*disc_callback)(struct fc_lport *,
- enum fc_disc_event);
-
- struct list_head rports;
- struct fc_lport *lport;
- struct mutex disc_mutex;
- struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
- struct work_struct disc_work;
-};
-
static void fc_disc_gpn_ft_req(struct fc_disc *);
static void fc_disc_gpn_ft_resp(struct fc_seq *, struct fc_frame *, void *);
static int fc_disc_new_target(struct fc_disc *, struct fc_rport *,
struct fc_rport_identifiers *);
static void fc_disc_del_target(struct fc_disc *, struct fc_rport *);
static void fc_disc_done(struct fc_disc *);
-static void fc_disc_timeout(void *);
+static void fc_disc_timeout(struct work_struct *);
static void fc_disc_single(struct fc_disc *, struct fc_disc_port *);
static void fc_disc_restart(struct fc_disc *);
/**
- * fc_disc_lookup_rport - lookup a remote port by port_id
+ * fc_disc_lookup_all_rports() - lookup both real and rogue ports by id
* @lport: Fibre Channel host port instance
* @port_id: remote port port_id to match
*/
-struct fc_rport *fc_disc_lookup_rport(const struct fc_lport *lport,
- u32 port_id)
+struct fc_rport *fc_disc_lookup_all_rports(const struct fc_lport *lport,
+ u32 port_id)
{
- struct fc_disc *disc = lport->disc;
+ const struct fc_disc *disc = &lport->disc;
struct fc_rport *rport, *found = NULL;
struct fc_rport_libfc_priv *rdata;
- int disc_found = 0;
-
- if (!disc)
- return NULL;
list_for_each_entry(rdata, &disc->rports, peers) {
rport = PRIV_TO_RPORT(rdata);
if (rport->port_id == port_id) {
- disc_found = 1;
found = rport;
- get_device(&found->dev);
- break;
+ goto out;
}
}
- if (!disc_found)
- found = NULL;
+ list_for_each_entry(rdata, &disc->rogue_rports, peers) {
+ rport = PRIV_TO_RPORT(rdata);
+ if (rport->port_id == port_id) {
+ found = rport;
+ goto out;
+ }
+ }
+out:
return found;
}
/**
- * fc_disc_alloc - Allocate a discovery work object
- * @lport: The FC lport associated with the discovery job
+ * fc_disc_lookup_rport() - lookup a remote port by port_id
+ * @lport: Fibre Channel host port instance
+ * @port_id: remote port port_id to match
*/
-static inline struct fc_disc *fc_disc_alloc(struct fc_lport *lport)
+struct fc_rport *fc_disc_lookup_rport(const struct fc_lport *lport,
+ u32 port_id)
{
- struct fc_disc *disc;
+ const struct fc_disc *disc = &lport->disc;
+ struct fc_rport *rport, *found = NULL;
+ struct fc_rport_libfc_priv *rdata;
+ int disc_found = 0;
- disc = kzalloc(sizeof(struct fc_disc), GFP_KERNEL);
- INIT_WORK(&disc->disc_work, fc_disc_timeout, disc);
- mutex_init(&disc->disc_mutex);
- INIT_LIST_HEAD(&disc->rports);
+ list_for_each_entry(rdata, &disc->rports, peers) {
+ rport = PRIV_TO_RPORT(rdata);
+ if (rport->port_id == port_id) {
+ disc_found = 1;
+ found = rport;
+ break;
+ }
+ }
- disc->lport = lport;
- lport->disc = disc;
- disc->delay = FC_DISC_DELAY;
- disc->event = DISC_EV_NONE;
+ if (!disc_found)
+ found = NULL;
- return disc;
+ return found;
}
/**
- * fc_disc_stop_rports - delete all the remote ports associated with the lport
+ * fc_disc_stop_rports() - delete all the remote ports associated with the lport
* @disc: The discovery job to stop rports on
*
* Locking Note: This function expects that the lport mutex is locked before
@@ -149,11 +137,16 @@ void fc_disc_stop_rports(struct fc_disc *disc)
lport->tt.rport_logoff(rport);
}
+ list_for_each_entry_safe(rdata, next, &disc->rogue_rports, peers) {
+ rport = PRIV_TO_RPORT(rdata);
+ lport->tt.rport_logoff(rport);
+ }
+
mutex_unlock(&disc->disc_mutex);
}
/**
- * fc_disc_rport_event - Event handler for rport events
+ * fc_disc_rport_callback() - Event handler for rport events
* @lport: The lport which is receiving the event
* @rport: The rport which the event has occured on
* @event: The event that occured
@@ -161,33 +154,42 @@ void fc_disc_stop_rports(struct fc_disc *disc)
* Locking Note: The rport lock should not be held when calling
* this function.
*/
-static void fc_disc_rport_event(struct fc_lport *lport,
- struct fc_rport *rport,
- enum fc_lport_event event)
+static void fc_disc_rport_callback(struct fc_lport *lport,
+ struct fc_rport *rport,
+ enum fc_rport_event event)
{
struct fc_rport_libfc_priv *rdata = rport->dd_data;
- struct fc_disc *disc = lport->disc;
- int found = 0;
+ struct fc_disc *disc = &lport->disc;
- FC_DEBUG_DISC("Received a %d event for port (%6x)\n", event,
- rport->port_id);
+ FC_DISC_DBG(disc, "Received a %d event for port (%6x)\n", event,
+ rport->port_id);
- if (event == RPORT_EV_CREATED) {
+ switch (event) {
+ case RPORT_EV_CREATED:
if (disc) {
- found = 1;
mutex_lock(&disc->disc_mutex);
list_add_tail(&rdata->peers, &disc->rports);
mutex_unlock(&disc->disc_mutex);
}
+ break;
+ case RPORT_EV_LOGO:
+ case RPORT_EV_FAILED:
+ case RPORT_EV_STOP:
+ mutex_lock(&disc->disc_mutex);
+ mutex_lock(&rdata->rp_mutex);
+ if (rdata->trans_state == FC_PORTSTATE_ROGUE)
+ list_del(&rdata->peers);
+ mutex_unlock(&rdata->rp_mutex);
+ mutex_unlock(&disc->disc_mutex);
+ break;
+ default:
+ break;
}
- if (!found)
- FC_DEBUG_DISC("The rport (%6x) is not maintained "
- "by the discovery layer\n", rport->port_id);
}
/**
- * fc_disc_recv_rscn_req - Handle Registered State Change Notification (RSCN)
+ * fc_disc_recv_rscn_req() - Handle Registered State Change Notification (RSCN)
* @sp: Current sequence of the RSCN exchange
* @fp: RSCN Frame
* @lport: Fibre Channel host port instance
@@ -213,20 +215,29 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
lport = disc->lport;
- FC_DEBUG_DISC("Received an RSCN event on port (%6x)\n",
- fc_host_port_id(lport->host));
+ FC_DISC_DBG(disc, "Received an RSCN event\n");
+ /* make sure the frame contains an RSCN message */
rp = fc_frame_payload_get(fp, sizeof(*rp));
-
- if (!rp || rp->rscn_page_len != sizeof(*pp))
+ if (!rp)
goto reject;
-
+ /* make sure the page length is as expected (4 bytes) */
+ if (rp->rscn_page_len != sizeof(*pp))
+ goto reject;
+ /* get the RSCN payload length */
len = ntohs(rp->rscn_plen);
if (len < sizeof(*rp))
goto reject;
+ /* make sure the frame contains the expected payload */
+ rp = fc_frame_payload_get(fp, len);
+ if (!rp)
+ goto reject;
+ /* payload must be a multiple of the RSCN page size */
len -= sizeof(*rp);
+ if (len % sizeof(*pp))
+ goto reject;
- for (pp = (void *)(rp + 1); len; len -= sizeof(*pp), pp++) {
+ for (pp = (void *)(rp + 1); len > 0; len -= sizeof(*pp), pp++) {
ev_qual = pp->rscn_page_flags >> ELS_RSCN_EV_QUAL_BIT;
ev_qual &= ELS_RSCN_EV_QUAL_MASK;
fmt = pp->rscn_page_flags >> ELS_RSCN_ADDR_FMT_BIT;
@@ -237,8 +248,8 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
*/
switch (fmt) {
case ELS_ADDR_FMT_PORT:
- FC_DEBUG_DISC("Port address format for port (%6x)\n",
- ntoh24(pp->rscn_fid));
+ FC_DISC_DBG(disc, "Port address format for port "
+ "(%6x)\n", ntoh24(pp->rscn_fid));
dp = kzalloc(sizeof(*dp), GFP_KERNEL);
if (!dp) {
redisc = 1;
@@ -255,25 +266,27 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
case ELS_ADDR_FMT_DOM:
case ELS_ADDR_FMT_FAB:
default:
- FC_DEBUG_DISC("Address format is (%d)\n", fmt);
+ FC_DISC_DBG(disc, "Address format is (%d)\n", fmt);
redisc = 1;
break;
}
}
lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
if (redisc) {
- FC_DEBUG_DISC("RSCN received: rediscovering\n");
+ FC_DISC_DBG(disc, "RSCN received: rediscovering\n");
fc_disc_restart(disc);
} else {
- FC_DEBUG_DISC("RSCN received: not rediscovering. "
- "redisc %d state %d in_prog %d\n",
- redisc, lport->state, disc->pending);
+ FC_DISC_DBG(disc, "RSCN received: not rediscovering. "
+ "redisc %d state %d in_prog %d\n",
+ redisc, lport->state, disc->pending);
list_for_each_entry_safe(dp, next, &disc_ports, peers) {
list_del(&dp->peers);
- rport = lport->tt.rport_lookup(lport, dp->ids.port_id);
+ rport = fc_disc_lookup_all_rports(lport,
+ dp->ids.port_id);
if (rport) {
- rdata = RPORT_TO_PRIV(rport);
- list_del(&rdata->peers);
+ rdata = rport->dd_data;
+ if (rdata->trans_state != FC_PORTSTATE_ROGUE)
+ list_del(&rdata->peers);
lport->tt.rport_logoff(rport);
}
fc_disc_single(disc, dp);
@@ -282,6 +295,7 @@ static void fc_disc_recv_rscn_req(struct fc_seq *sp, struct fc_frame *fp,
fc_frame_free(fp);
return;
reject:
+ FC_DISC_DBG(disc, "Received a bad RSCN frame\n");
rjt_data.fp = NULL;
rjt_data.reason = ELS_RJT_LOGIC;
rjt_data.explan = ELS_EXPL_NONE;
@@ -290,7 +304,7 @@ reject:
}
/**
- * fc_disc_recv_req - Handle incoming requests
+ * fc_disc_recv_req() - Handle incoming requests
* @sp: Current sequence of the request exchange
* @fp: The frame
* @lport: The FC local port
@@ -303,13 +317,7 @@ static void fc_disc_recv_req(struct fc_seq *sp, struct fc_frame *fp,
struct fc_lport *lport)
{
u8 op;
- struct fc_disc *disc = lport->disc;
-
- if (!disc) {
- FC_DBG("Received a request for an lport not managed "
- "by the discovery engine\n");
- return;
- }
+ struct fc_disc *disc = &lport->disc;
op = fc_frame_payload_op(fp);
switch (op) {
@@ -319,13 +327,14 @@ static void fc_disc_recv_req(struct fc_seq *sp, struct fc_frame *fp,
mutex_unlock(&disc->disc_mutex);
break;
default:
- FC_DBG("Received an unsupported request. opcode (%x)\n", op);
+ FC_DISC_DBG(disc, "Received an unsupported request, "
+ "the opcode is (%x)\n", op);
break;
}
}
/**
- * fc_disc_restart - Restart discovery
+ * fc_disc_restart() - Restart discovery
* @lport: FC discovery context
*
* Locking Note: This function expects that the disc mutex
@@ -337,23 +346,26 @@ static void fc_disc_restart(struct fc_disc *disc)
struct fc_rport_libfc_priv *rdata, *next;
struct fc_lport *lport = disc->lport;
- FC_DEBUG_DISC("Restarting discovery for port (%6x)\n",
- fc_host_port_id(lport->host));
+ FC_DISC_DBG(disc, "Restarting discovery\n");
list_for_each_entry_safe(rdata, next, &disc->rports, peers) {
rport = PRIV_TO_RPORT(rdata);
- FC_DEBUG_DISC("list_del(%6x)\n", rport->port_id);
list_del(&rdata->peers);
lport->tt.rport_logoff(rport);
}
+ list_for_each_entry_safe(rdata, next, &disc->rogue_rports, peers) {
+ rport = PRIV_TO_RPORT(rdata);
+ lport->tt.rport_logoff(rport);
+ }
+
disc->requested = 1;
if (!disc->pending)
fc_disc_gpn_ft_req(disc);
}
/**
- * fc_disc_start - Fibre Channel Target discovery
+ * fc_disc_start() - Fibre Channel Target discovery
* @lport: FC local port
*
* Returns non-zero if discovery cannot be started.
@@ -364,17 +376,7 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
{
struct fc_rport *rport;
struct fc_rport_identifiers ids;
- struct fc_disc *disc = lport->disc;
-
- if (!disc) {
- FC_DEBUG_DISC("No existing discovery job, "
- "creating one for lport (%6x)\n",
- fc_host_port_id(lport->host));
- disc = fc_disc_alloc(lport);
- } else
- FC_DEBUG_DISC("Found an existing discovery job "
- "for lport (%6x)\n",
- fc_host_port_id(lport->host));
+ struct fc_disc *disc = &lport->disc;
/*
* At this point we may have a new disc job or an existing
@@ -419,8 +421,12 @@ static void fc_disc_start(void (*disc_callback)(struct fc_lport *,
mutex_unlock(&disc->disc_mutex);
}
+static struct fc_rport_operations fc_disc_rport_ops = {
+ .event_callback = fc_disc_rport_callback,
+};
+
/**
- * fc_disc_new_target - Handle new target found by discovery
+ * fc_disc_new_target() - Handle new target found by discovery
* @lport: FC local port
* @rport: The previous FC remote port (NULL if new remote port)
* @ids: Identifiers for the new FC remote port
@@ -433,7 +439,7 @@ static int fc_disc_new_target(struct fc_disc *disc,
struct fc_rport_identifiers *ids)
{
struct fc_lport *lport = disc->lport;
- struct fc_rport_libfc_priv *rp;
+ struct fc_rport_libfc_priv *rdata;
int error = 0;
if (rport && ids->port_name) {
@@ -467,15 +473,16 @@ static int fc_disc_new_target(struct fc_disc *disc,
dp.ids.port_name = ids->port_name;
dp.ids.node_name = ids->node_name;
dp.ids.roles = ids->roles;
- rport = fc_rport_rogue_create(&dp);
+ rport = lport->tt.rport_create(&dp);
}
if (!rport)
error = -ENOMEM;
}
if (rport) {
- rp = rport->dd_data;
- rp->event_callback = fc_disc_rport_event;
- rp->rp_state = RPORT_ST_INIT;
+ rdata = rport->dd_data;
+ rdata->ops = &fc_disc_rport_ops;
+ rdata->rp_state = RPORT_ST_INIT;
+ list_add_tail(&rdata->peers, &disc->rogue_rports);
lport->tt.rport_login(rport);
}
}
@@ -483,40 +490,47 @@ static int fc_disc_new_target(struct fc_disc *disc,
}
/**
- * fc_disc_del_target - Delete a target
+ * fc_disc_del_target() - Delete a target
* @disc: FC discovery context
* @rport: The remote port to be removed
*/
static void fc_disc_del_target(struct fc_disc *disc, struct fc_rport *rport)
{
struct fc_lport *lport = disc->lport;
- struct fc_rport_libfc_priv *rdata = RPORT_TO_PRIV(rport);
+ struct fc_rport_libfc_priv *rdata = rport->dd_data;
list_del(&rdata->peers);
lport->tt.rport_logoff(rport);
}
/**
- * fc_disc_done - Discovery has been completed
+ * fc_disc_done() - Discovery has been completed
* @disc: FC discovery context
+ * Locking Note: This function expects that the disc mutex is locked before
+ * it is called. The discovery callback is then made with the lock released,
+ * and the lock is re-taken before returning from this function
*/
static void fc_disc_done(struct fc_disc *disc)
{
struct fc_lport *lport = disc->lport;
+ enum fc_disc_event event;
- FC_DEBUG_DISC("Discovery complete for port (%6x)\n",
- fc_host_port_id(lport->host));
+ FC_DISC_DBG(disc, "Discovery complete\n");
- disc->disc_callback(lport, disc->event);
+ event = disc->event;
disc->event = DISC_EV_NONE;
if (disc->requested)
fc_disc_gpn_ft_req(disc);
else
disc->pending = 0;
+
+ mutex_unlock(&disc->disc_mutex);
+ disc->disc_callback(lport, event);
+ mutex_lock(&disc->disc_mutex);
}
/**
- * fc_disc_error - Handle error on dNS request
+ * fc_disc_error() - Handle error on dNS request
* @disc: FC discovery context
* @fp: The frame pointer
*/
@@ -524,10 +538,10 @@ static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
{
struct fc_lport *lport = disc->lport;
unsigned long delay = 0;
- if (fc_disc_debug)
- FC_DBG("Error %ld, retries %d/%d\n",
- PTR_ERR(fp), disc->retry_count,
- FC_DISC_RETRY_LIMIT);
+
+ FC_DISC_DBG(disc, "Error %ld, retries %d/%d\n",
+ PTR_ERR(fp), disc->retry_count,
+ FC_DISC_RETRY_LIMIT);
if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
/*
@@ -556,7 +570,7 @@ static void fc_disc_error(struct fc_disc *disc, struct fc_frame *fp)
}
/**
- * fc_disc_gpn_ft_req - Send Get Port Names by FC-4 type (GPN_FT) request
+ * fc_disc_gpn_ft_req() - Send Get Port Names by FC-4 type (GPN_FT) request
* @lport: FC discovery context
*
* Locking Note: This function expects that the disc_mutex is locked
@@ -590,7 +604,7 @@ err:
}
/**
- * fc_disc_gpn_ft_parse - Parse the list of IDs and names resulting from a request
+ * fc_disc_gpn_ft_parse() - Parse the list of IDs and names resulting from a request
* @lport: Fibre Channel host port instance
* @buf: GPN_FT response buffer
* @len: size of response buffer
@@ -654,16 +668,18 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
if ((dp.ids.port_id != fc_host_port_id(lport->host)) &&
(dp.ids.port_name != lport->wwpn)) {
- rport = fc_rport_rogue_create(&dp);
+ rport = lport->tt.rport_create(&dp);
if (rport) {
rdata = rport->dd_data;
- rdata->event_callback = fc_disc_rport_event;
+ rdata->ops = &fc_disc_rport_ops;
rdata->local_port = lport;
+ list_add_tail(&rdata->peers,
+ &disc->rogue_rports);
lport->tt.rport_login(rport);
} else
- FC_DBG("Failed to allocate memory for "
- "the newly discovered port (%6x)\n",
- dp.ids.port_id);
+ printk(KERN_WARNING "libfc: Failed to allocate "
+ "memory for the newly discovered port "
+ "(%6x)\n", dp.ids.port_id);
}
if (np->fp_flags & FC_NS_FID_LAST) {
@@ -683,9 +699,8 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
*/
if (error == 0 && len > 0 && len < sizeof(*np)) {
if (np != &disc->partial_buf) {
- FC_DEBUG_DISC("Partial buffer remains "
- "for discovery by (%6x)\n",
- fc_host_port_id(lport->host));
+ FC_DISC_DBG(disc, "Partial buffer remains "
+ "for discovery\n");
memcpy(&disc->partial_buf, np, len);
}
disc->buf_len = (unsigned char) len;
@@ -695,13 +710,17 @@ static int fc_disc_gpn_ft_parse(struct fc_disc *disc, void *buf, size_t len)
return error;
}
-/*
+/**
+ * fc_disc_timeout() - Retry handler for the disc component
+ * @work: Structure holding disc obj that needs retry discovery
+ *
* Handle retry of memory allocation for remote ports.
*/
-static void fc_disc_timeout(void *data)
+static void fc_disc_timeout(struct work_struct *work)
{
- struct fc_disc *disc = data;
-
+ struct fc_disc *disc = container_of(work,
+ struct fc_disc,
+ disc_work.work);
mutex_lock(&disc->disc_mutex);
if (disc->requested && !disc->pending)
fc_disc_gpn_ft_req(disc);
@@ -709,13 +728,13 @@ static void fc_disc_timeout(void *data)
}
/**
- * fc_disc_gpn_ft_resp - Handle a response frame from Get Port Names (GPN_FT)
+ * fc_disc_gpn_ft_resp() - Handle a response frame from Get Port Names (GPN_FT)
* @sp: Current sequence of GPN_FT exchange
* @fp: response frame
* @lp_arg: Fibre Channel host port instance
*
- * Locking Note: This function expects that the disc_mutex is locked
- * before it is called.
+ * Locking Note: This function is called without disc mutex held, and
+ * should do all its processing with the mutex held
*/
static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
void *disc_arg)
@@ -728,11 +747,12 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
unsigned int len;
int error;
- FC_DEBUG_DISC("Received a GPN_FT response on port (%6x)\n",
- fc_host_port_id(disc->lport->host));
+ mutex_lock(&disc->disc_mutex);
+ FC_DISC_DBG(disc, "Received a GPN_FT response\n");
if (IS_ERR(fp)) {
fc_disc_error(disc, fp);
+ mutex_unlock(&disc->disc_mutex);
return;
}
@@ -744,32 +764,30 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
disc->seq_count == 0) {
cp = fc_frame_payload_get(fp, sizeof(*cp));
if (!cp) {
- FC_DBG("GPN_FT response too short, len %d\n",
- fr_len(fp));
+ FC_DISC_DBG(disc, "GPN_FT response too short, len %d\n",
+ fr_len(fp));
} else if (ntohs(cp->ct_cmd) == FC_FS_ACC) {
- /*
- * Accepted. Parse response.
- */
+ /* Accepted, parse the response. */
buf = cp + 1;
len -= sizeof(*cp);
} else if (ntohs(cp->ct_cmd) == FC_FS_RJT) {
- FC_DBG("GPN_FT rejected reason %x exp %x "
- "(check zoning)\n", cp->ct_reason,
- cp->ct_explan);
+ FC_DISC_DBG(disc, "GPN_FT rejected reason %x exp %x "
+ "(check zoning)\n", cp->ct_reason,
+ cp->ct_explan);
disc->event = DISC_EV_FAILED;
fc_disc_done(disc);
} else {
- FC_DBG("GPN_FT unexpected response code %x\n",
- ntohs(cp->ct_cmd));
+ FC_DISC_DBG(disc, "GPN_FT unexpected response code "
+ "%x\n", ntohs(cp->ct_cmd));
}
} else if (fr_sof(fp) == FC_SOF_N3 &&
seq_cnt == disc->seq_count) {
buf = fh + 1;
} else {
- FC_DBG("GPN_FT unexpected frame - out of sequence? "
- "seq_cnt %x expected %x sof %x eof %x\n",
- seq_cnt, disc->seq_count, fr_sof(fp), fr_eof(fp));
+ FC_DISC_DBG(disc, "GPN_FT unexpected frame - out of sequence? "
+ "seq_cnt %x expected %x sof %x eof %x\n",
+ seq_cnt, disc->seq_count, fr_sof(fp), fr_eof(fp));
}
if (buf) {
error = fc_disc_gpn_ft_parse(disc, buf, len);
@@ -779,10 +797,12 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
disc->seq_count++;
}
fc_frame_free(fp);
+
+ mutex_unlock(&disc->disc_mutex);
}
/**
- * fc_disc_single - Discover the directory information for a single target
+ * fc_disc_single() - Discover the directory information for a single target
* @lport: FC local port
* @dp: The port to rediscover
*
@@ -792,7 +812,6 @@ static void fc_disc_gpn_ft_resp(struct fc_seq *sp, struct fc_frame *fp,
static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp)
{
struct fc_lport *lport;
- struct fc_rport *rport;
struct fc_rport *new_rport;
struct fc_rport_libfc_priv *rdata;
@@ -801,17 +820,12 @@ static void fc_disc_single(struct fc_disc *disc, struct fc_disc_port *dp)
if (dp->ids.port_id == fc_host_port_id(lport->host))
goto out;
- rport = lport->tt.rport_lookup(lport, dp->ids.port_id);
- if (rport) {
- fc_disc_del_target(disc, rport);
- put_device(&rport->dev); /* hold from lookup */
- }
-
- new_rport = fc_rport_rogue_create(dp);
+ new_rport = lport->tt.rport_create(dp);
if (new_rport) {
rdata = new_rport->dd_data;
- rdata->event_callback = fc_disc_rport_event;
+ rdata->ops = &fc_disc_rport_ops;
kfree(dp);
+ list_add_tail(&rdata->peers, &disc->rogue_rports);
lport->tt.rport_login(new_rport);
}
return;
@@ -820,22 +834,21 @@ out:
}
/**
- * fc_disc_stop - Stop discovery for a given lport
+ * fc_disc_stop() - Stop discovery for a given lport
* @lport: The lport that discovery should stop for
*/
void fc_disc_stop(struct fc_lport *lport)
{
- struct fc_disc *disc = lport->disc;
+ struct fc_disc *disc = &lport->disc;
if (disc) {
- if (!cancel_delayed_work(&disc->disc_work))
- flush_scheduled_work();
+ cancel_delayed_work_sync(&disc->disc_work);
fc_disc_stop_rports(disc);
}
}
/**
- * fc_disc_stop_final - Stop discovery for a given lport
+ * fc_disc_stop_final() - Stop discovery for a given lport
* @lport: The lport that discovery should stop for
*
* This function will block until discovery has been
@@ -848,11 +861,12 @@ void fc_disc_stop_final(struct fc_lport *lport)
}
/**
- * fc_disc_init - Initialize the discovery block
+ * fc_disc_init() - Initialize the discovery block
* @lport: FC local port
*/
int fc_disc_init(struct fc_lport *lport)
{
+ struct fc_disc *disc;
if (!lport->tt.disc_start)
lport->tt.disc_start = fc_disc_start;
@@ -869,6 +883,16 @@ int fc_disc_init(struct fc_lport *lport)
if (!lport->tt.rport_lookup)
lport->tt.rport_lookup = fc_disc_lookup_rport;
+ disc = &lport->disc;
+ INIT_DELAYED_WORK(&disc->disc_work, fc_disc_timeout);
+ mutex_init(&disc->disc_mutex);
+ INIT_LIST_HEAD(&disc->rports);
+ INIT_LIST_HEAD(&disc->rogue_rports);
+
+ disc->lport = lport;
+ disc->delay = FC_DISC_DELAY;
+ disc->event = DISC_EV_NONE;
+
return 0;
}
EXPORT_SYMBOL(fc_disc_init);
diff --git a/drivers/scsi/libfc/fc_exch.c b/drivers/scsi/libfc/fc_exch.c
index fb6000f..5296f5a 100644
--- a/drivers/scsi/libfc/fc_exch.c
+++ b/drivers/scsi/libfc/fc_exch.c
@@ -33,20 +33,7 @@
#include <scsi/libfc.h>
#include <scsi/fc_encode.h>
-#define FC_DEF_R_A_TOV (10 * 1000) /* resource allocation timeout */
-
-/*
- * fc_exch_debug can be set in debugger or at compile time to get more logs.
- */
-static int fc_exch_debug;
-
-#define FC_DEBUG_EXCH(fmt...) \
- do { \
- if (fc_exch_debug) \
- FC_DBG(fmt); \
- } while (0)
-
-static struct kmem_cache *fc_em_cachep; /* cache for exchanges */
+static struct kmem_cache *fc_em_cachep; /* cache for exchanges */
/*
* Structure and function definitions for managing Fibre Channel Exchanges
@@ -69,7 +56,8 @@ static struct kmem_cache *fc_em_cachep; /* cache for exchanges */
*/
struct fc_exch_mgr {
enum fc_class class; /* default class for sequences */
- spinlock_t em_lock; /* exchange manager lock */
+ spinlock_t em_lock; /* exchange manager lock,
+ must be taken before ex_lock */
u16 last_xid; /* last allocated exchange ID */
u16 min_xid; /* min exchange ID */
u16 max_xid; /* max exchange ID */
@@ -180,6 +168,8 @@ static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp);
* sequence allocation and deallocation must be locked.
* - exchange refcnt can be done atomicly without locks.
* - sequence allocation must be locked by exch lock.
+ * - If the em_lock and ex_lock must be taken at the same time, then the
+ * em_lock must be taken before the ex_lock.
*/
/*
@@ -281,7 +271,7 @@ static void fc_exch_release(struct fc_exch *ep)
ep->destructor(&ep->seq, ep->arg);
if (ep->lp->tt.exch_put)
ep->lp->tt.exch_put(ep->lp, mp, ep->xid);
- WARN_ON(!ep->esb_stat & ESB_ST_COMPLETE);
+ WARN_ON(!(ep->esb_stat & ESB_ST_COMPLETE));
mempool_free(ep, mp->ep_pool);
}
}
@@ -333,8 +323,8 @@ static inline void fc_exch_timer_set_locked(struct fc_exch *ep,
if (ep->state & (FC_EX_RST_CLEANUP | FC_EX_DONE))
return;
- FC_DEBUG_EXCH("Exchange (%4x) timed out, notifying the upper layer\n",
- ep->xid);
+ FC_EXCH_DBG(ep, "Exchange timed out, notifying the upper layer\n");
+
if (schedule_delayed_work(&ep->timeout_work,
msecs_to_jiffies(timer_msec)))
fc_exch_hold(ep); /* hold for timer */
@@ -409,9 +399,10 @@ EXPORT_SYMBOL(fc_seq_exch_abort);
* Exchange timeout - handle exchange timer expiration.
* The timer will have been cancelled before this is called.
*/
-static void fc_exch_timeout(void *data)
+static void fc_exch_timeout(struct work_struct *work)
{
- struct fc_exch *ep = data;
+ struct fc_exch *ep = container_of(work, struct fc_exch,
+ timeout_work.work);
struct fc_seq *sp = &ep->seq;
void (*resp)(struct fc_seq *, struct fc_frame *fp, void *arg);
void *arg;
@@ -488,7 +479,7 @@ static u16 fc_em_alloc_xid(struct fc_exch_mgr *mp, const struct fc_frame *fp)
struct fc_exch *ep = NULL;
if (mp->max_read) {
- if (fc_frame_is_read(fp)) {
+ if (fc_fcp_is_read(fr_fsp(fp))) {
min = mp->min_xid;
max = mp->max_read;
plast = &mp->last_read;
@@ -544,7 +535,7 @@ struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
/* alloc a new xid */
xid = fc_em_alloc_xid(mp, fp);
if (!xid) {
- printk(KERN_ERR "fc_em_alloc_xid() failed\n");
+ printk(KERN_WARNING "libfc: Failed to allocate an exhange\n");
goto err;
}
}
@@ -573,7 +564,7 @@ struct fc_exch *fc_exch_alloc(struct fc_exch_mgr *mp,
ep->f_ctl = FC_FC_FIRST_SEQ; /* next seq is first seq */
ep->rxid = FC_XID_UNKNOWN;
ep->class = mp->class;
- INIT_WORK(&ep->timeout_work, fc_exch_timeout, ep);
+ INIT_DELAYED_WORK(&ep->timeout_work, fc_exch_timeout);
out:
return ep;
err:
@@ -624,7 +615,6 @@ static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
{
struct fc_exch *ep;
struct fc_frame_header *fh;
- u16 rxid;
ep = mp->lp->tt.exch_get(mp->lp, fp);
if (ep) {
@@ -651,18 +641,6 @@ static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
if ((ntoh24(fh->fh_f_ctl) & FC_FC_SEQ_INIT) == 0)
ep->esb_stat &= ~ESB_ST_SEQ_INIT;
- /*
- * Set the responder ID in the frame header.
- * The old one should've been 0xffff.
- * If it isn't, don't assign one.
- * Incoming basic link service frames may specify
- * a referenced RX_ID.
- */
- if (fh->fh_type != FC_TYPE_BLS) {
- rxid = ntohs(fh->fh_rx_id);
- WARN_ON(rxid != FC_XID_UNKNOWN);
- fh->fh_rx_id = htons(ep->rxid);
- }
fc_exch_hold(ep); /* hold for caller */
spin_unlock_bh(&ep->ex_lock); /* lock from exch_get */
}
@@ -674,8 +652,8 @@ static struct fc_exch *fc_exch_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
* If fc_pf_rjt_reason is FC_RJT_NONE then this function will have a hold
* on the ep that should be released by the caller.
*/
-static enum fc_pf_rjt_reason
-fc_seq_lookup_recip(struct fc_exch_mgr *mp, struct fc_frame *fp)
+static enum fc_pf_rjt_reason fc_seq_lookup_recip(struct fc_exch_mgr *mp,
+ struct fc_frame *fp)
{
struct fc_frame_header *fh = fc_frame_header_get(fp);
struct fc_exch *ep = NULL;
@@ -832,8 +810,8 @@ static struct fc_seq *fc_seq_start_next_locked(struct fc_seq *sp)
struct fc_exch *ep = fc_seq_exch(sp);
sp = fc_seq_alloc(ep, ep->seq_id++);
- FC_DEBUG_EXCH("exch %4x f_ctl %6x seq %2x\n",
- ep->xid, ep->f_ctl, sp->id);
+ FC_EXCH_DBG(ep, "f_ctl %6x seq %2x\n",
+ ep->f_ctl, sp->id);
return sp;
}
/*
@@ -913,7 +891,7 @@ void fc_seq_els_rsp_send(struct fc_seq *sp, enum fc_els_cmd els_cmd,
fc_exch_els_rec(sp, els_data->fp);
break;
default:
- FC_DBG("Invalid ELS CMD:%x\n", els_cmd);
+ FC_EXCH_DBG(fc_seq_exch(sp), "Invalid ELS CMD:%x\n", els_cmd);
}
}
EXPORT_SYMBOL(fc_seq_els_rsp_send);
@@ -993,9 +971,9 @@ static void fc_seq_send_ack(struct fc_seq *sp, const struct fc_frame *rx_fp)
* Send BLS Reject.
* This is for rejecting BA_ABTS only.
*/
-static void
-fc_exch_send_ba_rjt(struct fc_frame *rx_fp, enum fc_ba_rjt_reason reason,
- enum fc_ba_rjt_explan explan)
+static void fc_exch_send_ba_rjt(struct fc_frame *rx_fp,
+ enum fc_ba_rjt_reason reason,
+ enum fc_ba_rjt_explan explan)
{
struct fc_frame *fp;
struct fc_frame_header *rx_fh;
@@ -1093,7 +1071,7 @@ static void fc_exch_recv_abts(struct fc_exch *ep, struct fc_frame *rx_fp)
ap->ba_high_seq_cnt = fh->fh_seq_cnt;
ap->ba_low_seq_cnt = htons(sp->cnt);
}
- sp = fc_seq_start_next(sp);
+ sp = fc_seq_start_next_locked(sp);
spin_unlock_bh(&ep->ex_lock);
fc_seq_send_last(sp, fp, FC_RCTL_BA_ACC, FC_TYPE_BLS);
fc_frame_free(rx_fp);
@@ -1146,7 +1124,7 @@ static void fc_exch_recv_req(struct fc_lport *lp, struct fc_exch_mgr *mp,
lp->tt.lport_recv(lp, sp, fp);
fc_exch_release(ep); /* release from lookup */
} else {
- FC_DEBUG_EXCH("exch/seq lookup failed: reject %x\n", reject);
+ FC_EM_DBG(mp, "exch/seq lookup failed: reject %x\n", reject);
fc_frame_free(fp);
}
}
@@ -1250,10 +1228,10 @@ static void fc_exch_recv_resp(struct fc_exch_mgr *mp, struct fc_frame *fp)
sp = fc_seq_lookup_orig(mp, fp); /* doesn't hold sequence */
if (!sp) {
atomic_inc(&mp->stats.xid_not_found);
- FC_DEBUG_EXCH("seq lookup failed\n");
+ FC_EM_DBG(mp, "seq lookup failed\n");
} else {
atomic_inc(&mp->stats.non_bls_resp);
- FC_DEBUG_EXCH("non-BLS response to sequence");
+ FC_EM_DBG(mp, "non-BLS response to sequence");
}
fc_frame_free(fp);
}
@@ -1274,13 +1252,11 @@ static void fc_exch_abts_resp(struct fc_exch *ep, struct fc_frame *fp)
int rc = 1, has_rec = 0;
fh = fc_frame_header_get(fp);
- FC_DEBUG_EXCH("exch: BLS rctl %x - %s\n",
- fh->fh_r_ctl, fc_exch_rctl_name(fh->fh_r_ctl));
+ FC_EXCH_DBG(ep, "exch: BLS rctl %x - %s\n", fh->fh_r_ctl,
+ fc_exch_rctl_name(fh->fh_r_ctl));
- if (cancel_delayed_work(&ep->timeout_work))
+ if (cancel_delayed_work_sync(&ep->timeout_work))
fc_exch_release(ep); /* release from pending timer hold */
- else
- flush_scheduled_work();
spin_lock_bh(&ep->ex_lock);
switch (fh->fh_r_ctl) {
@@ -1369,9 +1345,9 @@ static void fc_exch_recv_bls(struct fc_exch_mgr *mp, struct fc_frame *fp)
case FC_RCTL_ACK_0:
break;
default:
- FC_DEBUG_EXCH("BLS rctl %x - %s received",
- fh->fh_r_ctl,
- fc_exch_rctl_name(fh->fh_r_ctl));
+ FC_EXCH_DBG(ep, "BLS rctl %x - %s received",
+ fh->fh_r_ctl,
+ fc_exch_rctl_name(fh->fh_r_ctl));
break;
}
fc_frame_free(fp);
@@ -1479,10 +1455,11 @@ static void fc_exch_reset(struct fc_exch *ep)
* If sid is non-zero, reset only exchanges we source from that FID.
* If did is non-zero, reset only exchanges destined to that FID.
*/
-void fc_exch_mgr_reset(struct fc_exch_mgr *mp, u32 sid, u32 did)
+void fc_exch_mgr_reset(struct fc_lport *lp, u32 sid, u32 did)
{
struct fc_exch *ep;
struct fc_exch *next;
+ struct fc_exch_mgr *mp = lp->emp;
spin_lock_bh(&mp->em_lock);
restart:
@@ -1606,9 +1583,10 @@ static void fc_exch_rrq_resp(struct fc_seq *sp, struct fc_frame *fp, void *arg)
if (IS_ERR(fp)) {
int err = PTR_ERR(fp);
- if (err == -FC_EX_CLOSED)
+ if (err == -FC_EX_CLOSED || err == -FC_EX_TIMEOUT)
goto cleanup;
- FC_DBG("Cannot process RRQ, because of frame error %d\n", err);
+ FC_EXCH_DBG(aborted_ep, "Cannot process RRQ, "
+ "frame error %d\n", err);
return;
}
@@ -1617,12 +1595,13 @@ static void fc_exch_rrq_resp(struct fc_seq *sp, struct fc_frame *fp, void *arg)
switch (op) {
case ELS_LS_RJT:
- FC_DBG("LS_RJT for RRQ");
+ FC_EXCH_DBG(aborted_ep, "LS_RJT for RRQ");
/* fall through */
case ELS_LS_ACC:
goto cleanup;
default:
- FC_DBG("unexpected response op %x for RRQ", op);
+ FC_EXCH_DBG(aborted_ep, "unexpected response op %x "
+ "for RRQ", op);
return;
}
@@ -1749,8 +1728,8 @@ struct fc_exch_mgr *fc_exch_mgr_alloc(struct fc_lport *lp,
size_t len;
if (max_xid <= min_xid || min_xid == 0 || max_xid == FC_XID_UNKNOWN) {
- FC_DBG("Invalid min_xid 0x:%x and max_xid 0x:%x\n",
- min_xid, max_xid);
+ FC_LPORT_DBG(lp, "Invalid min_xid 0x:%x and max_xid 0x:%x\n",
+ min_xid, max_xid);
return NULL;
}
@@ -1854,6 +1833,8 @@ struct fc_seq *fc_exch_seq_send(struct fc_lport *lp,
fc_exch_setup_hdr(ep, fp, ep->f_ctl);
sp->cnt++;
+ fc_fcp_ddp_setup(fr_fsp(fp), ep->xid);
+
if (unlikely(lp->tt.frame_send(lp, fp)))
goto err;
@@ -1885,7 +1866,8 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
/* lport lock ? */
if (!lp || !mp || (lp->state == LPORT_ST_NONE)) {
- FC_DBG("fc_lport or EM is not allocated and configured");
+ FC_LPORT_DBG(lp, "Receiving frames for an lport that "
+ "has not been initialized correctly\n");
fc_frame_free(fp);
return;
}
@@ -1911,7 +1893,7 @@ void fc_exch_recv(struct fc_lport *lp, struct fc_exch_mgr *mp,
fc_exch_recv_req(lp, mp, fp);
break;
default:
- FC_DBG("dropping invalid frame (eof %x)", fr_eof(fp));
+ FC_EM_DBG(mp, "dropping invalid frame (eof %x)", fr_eof(fp));
fc_frame_free(fp);
break;
}
@@ -1957,7 +1939,7 @@ EXPORT_SYMBOL(fc_exch_init);
int fc_setup_exch_mgr(void)
{
fc_em_cachep = kmem_cache_create("libfc_em", sizeof(struct fc_exch),
- 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+ 0, SLAB_HWCACHE_ALIGN, NULL);
if (!fc_em_cachep)
return -ENOMEM;
return 0;
diff --git a/drivers/scsi/libfc/fc_fcp.c b/drivers/scsi/libfc/fc_fcp.c
index 319c4d7..ac5682c 100644
--- a/drivers/scsi/libfc/fc_fcp.c
+++ b/drivers/scsi/libfc/fc_fcp.c
@@ -20,13 +20,13 @@
*/
#include <linux/module.h>
+#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/spinlock.h>
#include <linux/scatterlist.h>
#include <linux/err.h>
#include <linux/crc32.h>
-#include <linux/delay.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi.h>
@@ -41,15 +41,11 @@
MODULE_AUTHOR("Open-FCoE.org");
MODULE_DESCRIPTION("libfc");
-MODULE_LICENSE("GPL");
+MODULE_LICENSE("GPL v2");
-static int fc_fcp_debug;
-
-#define FC_DEBUG_FCP(fmt...) \
- do { \
- if (fc_fcp_debug) \
- FC_DBG(fmt); \
- } while (0)
+unsigned int fc_debug_logging;
+module_param_named(debug_logging, fc_debug_logging, int, S_IRUGO|S_IWUSR);
+MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
static struct kmem_cache *scsi_pkt_cachep;
@@ -161,7 +157,7 @@ static struct fc_fcp_pkt *fc_fcp_pkt_alloc(struct fc_lport *lp, gfp_t gfp)
}
/**
- * fc_fcp_pkt_release - release hold on scsi_pkt packet
+ * fc_fcp_pkt_release() - release hold on scsi_pkt packet
* @fsp: fcp packet struct
*
* This is used by upper layer scsi driver.
@@ -183,8 +179,7 @@ static void fc_fcp_pkt_hold(struct fc_fcp_pkt *fsp)
}
/**
- * fc_fcp_pkt_destory - release hold on scsi_pkt packet
- *
+ * fc_fcp_pkt_destory() - release hold on scsi_pkt packet
* @seq: exchange sequence
* @fsp: fcp packet struct
*
@@ -199,7 +194,7 @@ static void fc_fcp_pkt_destroy(struct fc_seq *seq, void *fsp)
}
/**
- * fc_fcp_lock_pkt - lock a packet and get a ref to it.
+ * fc_fcp_lock_pkt() - lock a packet and get a ref to it.
* @fsp: fcp packet
*
* We should only return error if we return a command to scsi-ml before
@@ -260,26 +255,61 @@ static void fc_fcp_retry_cmd(struct fc_fcp_pkt *fsp)
}
fsp->state &= ~FC_SRB_ABORT_PENDING;
- fsp->io_status = SUGGEST_RETRY << 24;
+ fsp->io_status = 0;
fsp->status_code = FC_ERROR;
fc_fcp_complete_locked(fsp);
}
-#define for_each_sg(sglist, __sg, nr, __i) \
- for (__i = 0, __sg = (sglist); __i < (nr); __i++, __sg = sg_next(__sg))
-
-static inline struct scatterlist *sg_next(struct scatterlist *sg)
+/*
+ * fc_fcp_ddp_setup - calls to LLD's ddp_setup to set up DDP
+ * transfer for a read I/O indicated by the fc_fcp_pkt.
+ * @fsp: ptr to the fc_fcp_pkt
+ *
+ * This is called in exch_seq_send() when we have a newly allocated
+ * exchange with a valid exchange id to setup ddp.
+ *
+ * returns: none
+ */
+void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid)
{
- if (!sg)
- return NULL;
- return sg + 1;
+ struct fc_lport *lp;
+
+ if (!fsp)
+ return;
+
+ lp = fsp->lp;
+ if ((fsp->req_flags & FC_SRB_READ) &&
+ (lp->lro_enabled) && (lp->tt.ddp_setup)) {
+ if (lp->tt.ddp_setup(lp, xid, scsi_sglist(fsp->cmd),
+ scsi_sg_count(fsp->cmd)))
+ fsp->xfer_ddp = xid;
+ }
}
+EXPORT_SYMBOL(fc_fcp_ddp_setup);
-static inline struct page *sg_page(struct scatterlist *sg)
+/*
+ * fc_fcp_ddp_done - calls to LLD's ddp_done to release any
+ * DDP related resources for this I/O if it is initialized
+ * as a ddp transfer
+ * @fsp: ptr to the fc_fcp_pkt
+ *
+ * returns: none
+ */
+static void fc_fcp_ddp_done(struct fc_fcp_pkt *fsp)
{
- return sg->page;
+ struct fc_lport *lp;
+
+ if (!fsp)
+ return;
+
+ lp = fsp->lp;
+ if (fsp->xfer_ddp && lp->tt.ddp_done) {
+ fsp->xfer_len = lp->tt.ddp_done(lp, fsp->xfer_ddp);
+ fsp->xfer_ddp = 0;
+ }
}
+
/*
* Receive SCSI data from target.
* Called after receiving solicited data.
@@ -306,15 +336,16 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
len = fr_len(fp) - sizeof(*fh);
buf = fc_frame_payload_get(fp, 0);
+ /* if this I/O is ddped, update xfer len */
+ fc_fcp_ddp_done(fsp);
+
if (offset + len > fsp->data_len) {
- /*
- * this should never happen
- */
+ /* this should never happen */
if ((fr_flags(fp) & FCPHF_CRC_UNCHECKED) &&
fc_frame_crc_check(fp))
goto crc_err;
- FC_DEBUG_FCP("data received past end. len %zx offset %zx "
- "data_len %x\n", len, offset, fsp->data_len);
+ FC_FCP_DBG(fsp, "data received past end. len %zx offset %zx "
+ "data_len %x\n", len, offset, fsp->data_len);
fc_fcp_retry_cmd(fsp);
return;
}
@@ -372,14 +403,15 @@ static void fc_fcp_recv_data(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
len += 4 - (len % 4);
}
- if (~crc != le32_to_cpu(*(__le32 *)(buf + len))) {
+ if (~crc != le32_to_cpu(fr_crc(fp))) {
crc_err:
- stats = lp->dev_stats[smp_processor_id()];
- if (stats) {
- stats->ErrorFrames++;
- if (stats->InvalidCRCCount++ < 5)
- FC_DBG("CRC error on data frame\n");
- }
+ stats = fc_lport_get_stats(lp);
+ stats->ErrorFrames++;
+ /* FIXME - per cpu count, not total count! */
+ if (stats->InvalidCRCCount++ < 5)
+ printk(KERN_WARNING "libfc: CRC error on data "
+ "frame for port (%6x)\n",
+ fc_host_port_id(lp->host));
/*
* Assume the frame is total garbage.
* We may have copied it over the good part
@@ -406,8 +438,8 @@ crc_err:
fc_fcp_complete_locked(fsp);
}
-/*
- * fc_fcp_send_data - Send SCSI data to target.
+/**
+ * fc_fcp_send_data() - Send SCSI data to target.
* @fsp: ptr to fc_fcp_pkt
* @sp: ptr to this sequence
* @offset: starting offset for this data request
@@ -442,14 +474,14 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
WARN_ON(seq_blen <= 0);
if (unlikely(offset + seq_blen > fsp->data_len)) {
/* this should never happen */
- FC_DEBUG_FCP("xfer-ready past end. seq_blen %zx offset %zx\n",
- seq_blen, offset);
+ FC_FCP_DBG(fsp, "xfer-ready past end. seq_blen %zx "
+ "offset %zx\n", seq_blen, offset);
fc_fcp_send_abort(fsp);
return 0;
} else if (offset != fsp->xfer_len) {
/* Out of Order Data Request - no problem, but unexpected. */
- FC_DEBUG_FCP("xfer-ready non-contiguous. "
- "seq_blen %zx offset %zx\n", seq_blen, offset);
+ FC_FCP_DBG(fsp, "xfer-ready non-contiguous. "
+ "seq_blen %zx offset %zx\n", seq_blen, offset);
}
/*
@@ -457,7 +489,13 @@ static int fc_fcp_send_data(struct fc_fcp_pkt *fsp, struct fc_seq *seq,
* burst length (t_blen) to seq_blen, otherwise set t_blen
* to max FC frame payload previously set in fsp->max_payload.
*/
- t_blen = lp->seq_offload ? seq_blen : fsp->max_payload;
+ t_blen = fsp->max_payload;
+ if (lp->seq_offload) {
+ t_blen = min(seq_blen, (size_t)lp->lso_max);
+ FC_FCP_DBG(fsp, "fsp=%p:lso:blen=%zx lso_max=0x%x t_blen=%zx\n",
+ fsp, seq_blen, lp->lso_max, t_blen);
+ }
+
WARN_ON(t_blen < FC_MIN_MAX_PAYLOAD);
if (t_blen > 512)
t_blen &= ~(512 - 1); /* round down to block size */
@@ -631,8 +669,8 @@ static void fc_fcp_abts_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
}
}
-/*
- * fc_fcp_reduce_can_queue - drop can_queue
+/**
+ * fc_fcp_reduce_can_queue() - drop can_queue
* @lp: lport to drop queueing for
*
* If we are getting memory allocation failures, then we may
@@ -657,15 +695,17 @@ static void fc_fcp_reduce_can_queue(struct fc_lport *lp)
if (!can_queue)
can_queue = 1;
lp->host->can_queue = can_queue;
- shost_printk(KERN_ERR, lp->host, "Could not allocate frame.\n"
+ shost_printk(KERN_ERR, lp->host, "libfc: Could not allocate frame.\n"
"Reducing can_queue to %d.\n", can_queue);
done:
spin_unlock_irqrestore(lp->host->host_lock, flags);
}
-/*
- * exch mgr calls this routine to process scsi
- * exchanges.
+/**
+ * fc_fcp_recv() - Reveive FCP frames
+ * @seq: The sequence the frame is on
+ * @fp: The FC frame
+ * @arg: The related FCP packet
*
* Return : None
* Context : called from Soft IRQ context
@@ -730,7 +770,7 @@ static void fc_fcp_recv(struct fc_seq *seq, struct fc_frame *fp, void *arg)
fc_fcp_resp(fsp, fp);
} else {
- FC_DBG("unexpected frame. r_ctl %x\n", r_ctl);
+ FC_FCP_DBG(fsp, "unexpected frame. r_ctl %x\n", r_ctl);
}
unlock:
fc_fcp_unlock_pkt(fsp);
@@ -766,6 +806,9 @@ static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
fsp->scsi_comp_flags = flags;
expected_len = fsp->data_len;
+ /* if ddp, update xfer len */
+ fc_fcp_ddp_done(fsp);
+
if (unlikely((flags & ~FCP_CONF_REQ) || fc_rp->fr_status)) {
rp_ex = (void *)(fc_rp + 1);
if (flags & (FCP_RSP_LEN_VAL | FCP_SNS_LEN_VAL)) {
@@ -836,24 +879,24 @@ static void fc_fcp_resp(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
return;
}
fsp->status_code = FC_DATA_OVRRUN;
- FC_DBG("tgt %6x xfer len %zx greater than expected len %x. "
- "data len %x\n",
- fsp->rport->port_id,
- fsp->xfer_len, expected_len, fsp->data_len);
+ FC_FCP_DBG(fsp, "tgt %6x xfer len %zx greater than expected, "
+ "len %x, data len %x\n",
+ fsp->rport->port_id,
+ fsp->xfer_len, expected_len, fsp->data_len);
}
fc_fcp_complete_locked(fsp);
return;
len_err:
- FC_DBG("short FCP response. flags 0x%x len %u respl %u snsl %u\n",
- flags, fr_len(fp), respl, snsl);
+ FC_FCP_DBG(fsp, "short FCP response. flags 0x%x len %u respl %u "
+ "snsl %u\n", flags, fr_len(fp), respl, snsl);
err:
fsp->status_code = FC_ERROR;
fc_fcp_complete_locked(fsp);
}
/**
- * fc_fcp_complete_locked - complete processing of a fcp packet
+ * fc_fcp_complete_locked() - complete processing of a fcp packet
* @fsp: fcp packet
*
* This function may sleep if a timer is pending. The packet lock must be
@@ -881,7 +924,7 @@ static void fc_fcp_complete_locked(struct fc_fcp_pkt *fsp)
(!(fsp->scsi_comp_flags & FCP_RESID_UNDER) ||
fsp->xfer_len < fsp->data_len - fsp->scsi_resid)) {
fsp->status_code = FC_DATA_UNDRUN;
- fsp->io_status = SUGGEST_RETRY << 24;
+ fsp->io_status = 0;
}
}
@@ -921,7 +964,7 @@ static void fc_fcp_cleanup_cmd(struct fc_fcp_pkt *fsp, int error)
}
/**
- * fc_fcp_cleanup_each_cmd - run fn on each active command
+ * fc_fcp_cleanup_each_cmd() - Cleanup active commads
* @lp: logical port
* @id: target id
* @lun: lun
@@ -973,7 +1016,7 @@ static void fc_fcp_abort_io(struct fc_lport *lp)
}
/**
- * fc_fcp_pkt_send - send a fcp packet to the lower level.
+ * fc_fcp_pkt_send() - send a fcp packet to the lower level.
* @lp: fc lport
* @fsp: fc packet.
*
@@ -1028,7 +1071,7 @@ static int fc_fcp_cmd_send(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
}
memcpy(fc_frame_payload_get(fp, len), &fsp->cdb_cmd, len);
- fr_cmd(fp) = fsp->cmd;
+ fr_fsp(fp) = fsp;
rport = fsp->rport;
fsp->max_payload = rport->maxframe_size;
rp = rport->dd_data;
@@ -1066,13 +1109,11 @@ static void fc_fcp_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
if (fc_fcp_lock_pkt(fsp))
return;
- switch (error) {
- case -FC_EX_CLOSED:
+ if (error == -FC_EX_CLOSED) {
fc_fcp_retry_cmd(fsp);
goto unlock;
- default:
- FC_DBG("unknown error %ld\n", PTR_ERR(fp));
}
+
/*
* clear abort pending, because the lower layer
* decided to force completion.
@@ -1104,10 +1145,10 @@ static int fc_fcp_pkt_abort(struct fc_lport *lp, struct fc_fcp_pkt *fsp)
fsp->wait_for_comp = 0;
if (!rc) {
- FC_DBG("target abort cmd failed\n");
+ FC_FCP_DBG(fsp, "target abort cmd failed\n");
rc = FAILED;
} else if (fsp->state & FC_SRB_ABORTED) {
- FC_DBG("target abort cmd passed\n");
+ FC_FCP_DBG(fsp, "target abort cmd passed\n");
rc = SUCCESS;
fc_fcp_complete_locked(fsp);
}
@@ -1172,7 +1213,7 @@ static int fc_lun_reset(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
spin_unlock_bh(&fsp->scsi_pkt_lock);
if (!rc) {
- FC_DBG("lun reset failed\n");
+ FC_SCSI_DBG(lp, "lun reset failed\n");
return FAILED;
}
@@ -1180,7 +1221,7 @@ static int fc_lun_reset(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
if (fsp->cdb_status != FCP_TMF_CMPL)
return FAILED;
- FC_DBG("lun reset to lun %u completed\n", lun);
+ FC_SCSI_DBG(lp, "lun reset to lun %u completed\n", lun);
fc_fcp_cleanup_each_cmd(lp, id, lun, FC_CMD_ABORTED);
return SUCCESS;
}
@@ -1289,7 +1330,7 @@ static void fc_fcp_rec(struct fc_fcp_pkt *fsp)
rp = rport->dd_data;
if (!fsp->seq_ptr || rp->rp_state != RPORT_ST_READY) {
fsp->status_code = FC_HRD_ERROR;
- fsp->io_status = SUGGEST_RETRY << 24;
+ fsp->io_status = 0;
fc_fcp_complete_locked(fsp);
return;
}
@@ -1347,13 +1388,13 @@ static void fc_fcp_rec_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
rjt = fc_frame_payload_get(fp, sizeof(*rjt));
switch (rjt->er_reason) {
default:
- FC_DEBUG_FCP("device %x unexpected REC reject "
- "reason %d expl %d\n",
- fsp->rport->port_id, rjt->er_reason,
- rjt->er_explan);
+ FC_FCP_DBG(fsp, "device %x unexpected REC reject "
+ "reason %d expl %d\n",
+ fsp->rport->port_id, rjt->er_reason,
+ rjt->er_explan);
/* fall through */
case ELS_RJT_UNSUP:
- FC_DEBUG_FCP("device does not support REC\n");
+ FC_FCP_DBG(fsp, "device does not support REC\n");
rp = fsp->rport->dd_data;
/*
* if we do not spport RECs or got some bogus
@@ -1473,8 +1514,8 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
break;
default:
- FC_DBG("REC %p fid %x error unexpected error %d\n",
- fsp, fsp->rport->port_id, error);
+ FC_FCP_DBG(fsp, "REC %p fid %x error unexpected error %d\n",
+ fsp, fsp->rport->port_id, error);
fsp->status_code = FC_CMD_PLOGO;
/* fall through */
@@ -1483,9 +1524,9 @@ static void fc_fcp_rec_error(struct fc_fcp_pkt *fsp, struct fc_frame *fp)
* Assume REC or LS_ACC was lost.
* The exchange manager will have aborted REC, so retry.
*/
- FC_DBG("REC fid %x error error %d retry %d/%d\n",
- fsp->rport->port_id, error, fsp->recov_retry,
- FC_MAX_RECOV_RETRY);
+ FC_FCP_DBG(fsp, "REC fid %x error error %d retry %d/%d\n",
+ fsp->rport->port_id, error, fsp->recov_retry,
+ FC_MAX_RECOV_RETRY);
if (fsp->recov_retry++ < FC_MAX_RECOV_RETRY)
fc_fcp_rec(fsp);
else
@@ -1642,7 +1683,7 @@ out:
static inline int fc_fcp_lport_queue_ready(struct fc_lport *lp)
{
/* lock ? */
- return (lp->state == LPORT_ST_READY) && (lp->link_status & FC_LINK_UP);
+ return (lp->state == LPORT_ST_READY) && lp->link_up;
}
/**
@@ -1712,23 +1753,18 @@ int fc_queuecommand(struct scsi_cmnd *sc_cmd, void (*done)(struct scsi_cmnd *))
/*
* setup the data direction
*/
- stats = lp->dev_stats[smp_processor_id()];
+ stats = fc_lport_get_stats(lp);
if (sc_cmd->sc_data_direction == DMA_FROM_DEVICE) {
fsp->req_flags = FC_SRB_READ;
- if (stats) {
- stats->InputRequests++;
- stats->InputMegabytes = fsp->data_len;
- }
+ stats->InputRequests++;
+ stats->InputMegabytes = fsp->data_len;
} else if (sc_cmd->sc_data_direction == DMA_TO_DEVICE) {
fsp->req_flags = FC_SRB_WRITE;
- if (stats) {
- stats->OutputRequests++;
- stats->OutputMegabytes = fsp->data_len;
- }
+ stats->OutputRequests++;
+ stats->OutputMegabytes = fsp->data_len;
} else {
fsp->req_flags = 0;
- if (stats)
- stats->ControlRequests++;
+ stats->ControlRequests++;
}
fsp->tgt_flags = rp->flags;
@@ -1753,7 +1789,7 @@ out:
EXPORT_SYMBOL(fc_queuecommand);
/**
- * fc_io_compl - Handle responses for completed commands
+ * fc_io_compl() - Handle responses for completed commands
* @fsp: scsi packet
*
* Translates a error to a Linux SCSI error.
@@ -1767,6 +1803,9 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
struct fc_lport *lp;
unsigned long flags;
+ /* release outstanding ddp context */
+ fc_fcp_ddp_done(fsp);
+
fsp->state |= FC_SRB_COMPL;
if (!(fsp->state & FC_SRB_FCP_PROCESSING_TMO)) {
spin_unlock_bh(&fsp->scsi_pkt_lock);
@@ -1836,12 +1875,12 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
sc_cmd->result = DID_ERROR << 16;
break;
case FC_DATA_UNDRUN:
- if (fsp->cdb_status == 0) {
+ if ((fsp->cdb_status == 0) && !(fsp->req_flags & FC_SRB_READ)) {
/*
* scsi status is good but transport level
- * underrun. for read it should be an error??
+ * underrun.
*/
- sc_cmd->result = (DID_OK << 16) | fsp->cdb_status;
+ sc_cmd->result = DID_OK << 16;
} else {
/*
* scsi got underrun, this is an error
@@ -1857,7 +1896,7 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
sc_cmd->result = (DID_ERROR << 16) | fsp->cdb_status;
break;
case FC_CMD_ABORTED:
- sc_cmd->result = (DID_ABORT << 16) | fsp->io_status;
+ sc_cmd->result = (DID_ERROR << 16) | fsp->io_status;
break;
case FC_CMD_TIME_OUT:
sc_cmd->result = (DID_BUS_BUSY << 16) | fsp->io_status;
@@ -1883,7 +1922,7 @@ static void fc_io_compl(struct fc_fcp_pkt *fsp)
}
/**
- * fc_fcp_complete - complete processing of a fcp packet
+ * fc_fcp_complete() - complete processing of a fcp packet
* @fsp: fcp packet
*
* This function may sleep if a fsp timer is pending.
@@ -1900,9 +1939,10 @@ void fc_fcp_complete(struct fc_fcp_pkt *fsp)
EXPORT_SYMBOL(fc_fcp_complete);
/**
- * fc_eh_abort - Abort a command...from scsi host template
+ * fc_eh_abort() - Abort a command
* @sc_cmd: scsi command to abort
*
+ * From scsi host template.
* send ABTS to the target device and wait for the response
* sc_cmd is the pointer to the command to be aborted.
*/
@@ -1916,7 +1956,7 @@ int fc_eh_abort(struct scsi_cmnd *sc_cmd)
lp = shost_priv(sc_cmd->device->host);
if (lp->state != LPORT_ST_READY)
return rc;
- else if (!(lp->link_status & FC_LINK_UP))
+ else if (!lp->link_up)
return rc;
spin_lock_irqsave(lp->host->host_lock, flags);
@@ -1946,7 +1986,7 @@ release_pkt:
EXPORT_SYMBOL(fc_eh_abort);
/**
- * fc_eh_device_reset: Reset a single LUN
+ * fc_eh_device_reset() Reset a single LUN
* @sc_cmd: scsi command
*
* Set from scsi host template to send tm cmd to the target and wait for the
@@ -1971,9 +2011,11 @@ int fc_eh_device_reset(struct scsi_cmnd *sc_cmd)
if (lp->state != LPORT_ST_READY)
return rc;
+ FC_SCSI_DBG(lp, "Resetting rport (%6x)\n", rport->port_id);
+
fsp = fc_fcp_pkt_alloc(lp, GFP_NOIO);
if (fsp == NULL) {
- FC_DBG("could not allocate scsi_pkt\n");
+ printk(KERN_WARNING "libfc: could not allocate scsi_pkt\n");
sc_cmd->result = DID_NO_CONNECT << 16;
goto out;
}
@@ -1999,7 +2041,7 @@ out:
EXPORT_SYMBOL(fc_eh_device_reset);
/**
- * fc_eh_host_reset - The reset function will reset the ports on the host.
+ * fc_eh_host_reset() - The reset function will reset the ports on the host.
* @sc_cmd: scsi command
*/
int fc_eh_host_reset(struct scsi_cmnd *sc_cmd)
@@ -2008,24 +2050,28 @@ int fc_eh_host_reset(struct scsi_cmnd *sc_cmd)
struct fc_lport *lp = shost_priv(shost);
unsigned long wait_tmo;
+ FC_SCSI_DBG(lp, "Resetting host\n");
+
lp->tt.lport_reset(lp);
wait_tmo = jiffies + FC_HOST_RESET_TIMEOUT;
while (!fc_fcp_lport_queue_ready(lp) && time_before(jiffies, wait_tmo))
msleep(1000);
if (fc_fcp_lport_queue_ready(lp)) {
- shost_printk(KERN_INFO, shost, "Host reset succeeded.\n");
+ shost_printk(KERN_INFO, shost, "libfc: Host reset succeeded "
+ "on port (%6x)\n", fc_host_port_id(lp->host));
return SUCCESS;
} else {
- shost_printk(KERN_INFO, shost, "Host reset failed. "
- "lport not ready.\n");
+ shost_printk(KERN_INFO, shost, "libfc: Host reset failed, "
+ "port (%6x) is not ready.\n",
+ fc_host_port_id(lp->host));
return FAILED;
}
}
EXPORT_SYMBOL(fc_eh_host_reset);
/**
- * fc_slave_alloc - configure queue depth
+ * fc_slave_alloc() - configure queue depth
* @sdev: scsi device
*
* Configures queue depth based on host's cmd_per_len. If not set
@@ -2077,7 +2123,8 @@ void fc_fcp_destroy(struct fc_lport *lp)
struct fc_fcp_internal *si = fc_get_scsi_internal(lp);
if (!list_empty(&si->scsi_pkt_queue))
- printk(KERN_ERR "Leaked scsi packets.\n");
+ printk(KERN_ERR "libfc: Leaked SCSI packets when destroying "
+ "port (%6x)\n", fc_host_port_id(lp->host));
mempool_destroy(si->scsi_pkt_pool);
kfree(si);
@@ -2124,9 +2171,10 @@ static int __init libfc_init(void)
scsi_pkt_cachep = kmem_cache_create("libfc_fcp_pkt",
sizeof(struct fc_fcp_pkt),
- 0, SLAB_HWCACHE_ALIGN, NULL, NULL);
+ 0, SLAB_HWCACHE_ALIGN, NULL);
if (scsi_pkt_cachep == NULL) {
- FC_DBG("Unable to allocate SRB cache...module load failed!");
+ printk(KERN_ERR "libfc: Unable to allocate SRB cache, "
+ "module load failed!");
return -ENOMEM;
}
diff --git a/drivers/scsi/libfc/fc_frame.c b/drivers/scsi/libfc/fc_frame.c
index 0bbeff2..63fe00c 100644
--- a/drivers/scsi/libfc/fc_frame.c
+++ b/drivers/scsi/libfc/fc_frame.c
@@ -42,7 +42,7 @@ u32 fc_frame_crc_check(struct fc_frame *fp)
len = (fr_len(fp) + 3) & ~3; /* round up length to include fill */
bp = (const u8 *) fr_hdr(fp);
crc = ~crc32(~0, bp, len);
- error = crc ^ *(u32 *) (bp + len);
+ error = crc ^ fr_crc(fp);
return error;
}
EXPORT_SYMBOL(fc_frame_crc_check);
diff --git a/drivers/scsi/libfc/fc_lport.c b/drivers/scsi/libfc/fc_lport.c
index 4a9f54a..2db9f78 100644
--- a/drivers/scsi/libfc/fc_lport.c
+++ b/drivers/scsi/libfc/fc_lport.c
@@ -18,34 +18,51 @@
*/
/*
- * General locking notes:
+ * PORT LOCKING NOTES
*
- * The lport and rport blocks both have mutexes that are used to protect
- * the port objects states. The main motivation for this protection is that
- * we don't want to be preparing a request/response in one context while
- * another thread "resets" the port in question. For example, if the lport
- * block is sending a SCR request to the directory server we don't want
- * the lport to be reset before we fill out the frame header's port_id. The
- * problem is that a reset would cause the lport's port_id to reset to 0.
- * If we don't protect the lport we'd spew incorrect frames.
+ * These comments only apply to the 'port code' which consists of the lport,
+ * disc and rport blocks.
*
- * At the time of this writing there are two primary mutexes, one for the
- * lport and one for the rport. Since the lport uses the rport and makes
- * calls into that block the rport should never make calls that would cause
- * the lport's mutex to be locked. In other words, the lport's mutex is
- * considered the outer lock and the rport's lock is considered the inner
- * lock. The bottom line is that you can hold a lport's mutex and then
- * hold the rport's mutex, but not the other way around.
+ * MOTIVATION
*
- * The only complication to this rule is the callbacks from the rport to
- * the lport's event_callback function. When rports become READY they make
- * a callback to the lport so that it can track them. In the case of the
- * directory server that callback might cause the lport to change its
- * state, implying that the lport mutex would need to be held. This problem
- * was solved by serializing the rport notifications to the lport and the
- * callback is made without holding the rport's lock.
+ * The lport, disc and rport blocks all have mutexes that are used to protect
+ * those objects. The main motivation for these locks is to prevent from
+ * having an lport reset just before we send a frame. In that scenario the
+ * lport's FID would get set to zero and then we'd send a frame with an
+ * invalid SID. We also need to ensure that states don't change unexpectedly
+ * while processing another state.
*
- * lport locking notes:
+ * HEIRARCHY
+ *
+ * The following heirarchy defines the locking rules. A greater lock
+ * may be held before acquiring a lesser lock, but a lesser lock should never
+ * be held while attempting to acquire a greater lock. Here is the heirarchy-
+ *
+ * lport > disc, lport > rport, disc > rport
+ *
+ * CALLBACKS
+ *
+ * The callbacks cause complications with this scheme. There is a callback
+ * from the rport (to either lport or disc) and a callback from disc
+ * (to the lport).
+ *
+ * As rports exit the rport state machine a callback is made to the owner of
+ * the rport to notify success or failure. Since the callback is likely to
+ * cause the lport or disc to grab its lock we cannot hold the rport lock
+ * while making the callback. To ensure that the rport is not free'd while
+ * processing the callback the rport callbacks are serialized through a
+ * single-threaded workqueue. An rport would never be free'd while in a
+ * callback handler becuase no other rport work in this queue can be executed
+ * at the same time.
+ *
+ * When discovery succeeds or fails a callback is made to the lport as
+ * notification. Currently, succesful discovery causes the lport to take no
+ * action. A failure will cause the lport to reset. There is likely a circular
+ * locking problem with this implementation.
+ */
+
+/*
+ * LPORT LOCKING
*
* The critical sections protected by the lport's mutex are quite broad and
* may be improved upon in the future. The lport code and its locking doesn't
@@ -54,9 +71,9 @@
*
* The strategy is to lock whenever processing a request or response. Note
* that every _enter_* function corresponds to a state change. They generally
- * change the lports state and then sends a request out on the wire. We lock
+ * change the lports state and then send a request out on the wire. We lock
* before calling any of these functions to protect that state change. This
- * means that the entry points into the lport block to manage the locks while
+ * means that the entry points into the lport block manage the locks while
* the state machine can transition between states (i.e. _enter_* functions)
* while always staying protected.
*
@@ -68,9 +85,6 @@
* Retries also have to consider the locking. The retries occur from a work
* context and the work function will lock the lport and then retry the state
* (i.e. _enter_* function).
- *
- * The implication to all of this is that each lport can only process one
- * state at a time.
*/
#include <linux/timer.h>
@@ -87,14 +101,6 @@
#define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
-static int fc_lport_debug;
-
-#define FC_DEBUG_LPORT(fmt...) \
- do { \
- if (fc_lport_debug) \
- FC_DBG(fmt); \
- } while (0)
-
static void fc_lport_error(struct fc_lport *, struct fc_frame *);
static void fc_lport_enter_reset(struct fc_lport *);
@@ -125,7 +131,7 @@ static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
}
/**
- * fc_lport_rport_event - Event handler for rport events
+ * fc_lport_rport_callback() - Event handler for rport events
* @lport: The lport which is receiving the event
* @rport: The rport which the event has occured on
* @event: The event that occured
@@ -133,12 +139,12 @@ static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
* Locking Note: The rport lock should not be held when calling
* this function.
*/
-static void fc_lport_rport_event(struct fc_lport *lport,
- struct fc_rport *rport,
- enum fc_lport_event event)
+static void fc_lport_rport_callback(struct fc_lport *lport,
+ struct fc_rport *rport,
+ enum fc_rport_event event)
{
- FC_DEBUG_LPORT("Received a %d event for port (%6x)\n", event,
- rport->port_id);
+ FC_LPORT_DBG(lport, "Received a %d event for port (%6x)\n", event,
+ rport->port_id);
switch (event) {
case RPORT_EV_CREATED:
@@ -148,19 +154,19 @@ static void fc_lport_rport_event(struct fc_lport *lport,
lport->dns_rp = rport;
fc_lport_enter_rpn_id(lport);
} else {
- FC_DEBUG_LPORT("Received an CREATED event on "
- "port (%6x) for the directory "
- "server, but the lport is not "
- "in the DNS state, it's in the "
- "%d state", rport->port_id,
- lport->state);
+ FC_LPORT_DBG(lport, "Received an CREATED event "
+ "on port (%6x) for the directory "
+ "server, but the lport is not "
+ "in the DNS state, it's in the "
+ "%d state", rport->port_id,
+ lport->state);
lport->tt.rport_logoff(rport);
}
mutex_unlock(&lport->lp_mutex);
} else
- FC_DEBUG_LPORT("Received an event for port (%6x) "
- "which is not the directory server\n",
- rport->port_id);
+ FC_LPORT_DBG(lport, "Received an event for port (%6x) "
+ "which is not the directory server\n",
+ rport->port_id);
break;
case RPORT_EV_LOGO:
case RPORT_EV_FAILED:
@@ -171,9 +177,9 @@ static void fc_lport_rport_event(struct fc_lport *lport,
mutex_unlock(&lport->lp_mutex);
} else
- FC_DEBUG_LPORT("Received an event for port (%6x) "
- "which is not the directory server\n",
- rport->port_id);
+ FC_LPORT_DBG(lport, "Received an event for port (%6x) "
+ "which is not the directory server\n",
+ rport->port_id);
break;
case RPORT_EV_NONE:
break;
@@ -181,7 +187,7 @@ static void fc_lport_rport_event(struct fc_lport *lport,
}
/**
- * fc_lport_state - Return a string which represents the lport's state
+ * fc_lport_state() - Return a string which represents the lport's state
* @lport: The lport whose state is to converted to a string
*/
static const char *fc_lport_state(struct fc_lport *lport)
@@ -195,7 +201,7 @@ static const char *fc_lport_state(struct fc_lport *lport)
}
/**
- * fc_lport_ptp_setup - Create an rport for point-to-point mode
+ * fc_lport_ptp_setup() - Create an rport for point-to-point mode
* @lport: The lport to attach the ptp rport to
* @fid: The FID of the ptp rport
* @remote_wwpn: The WWPN of the ptp rport
@@ -218,7 +224,7 @@ static void fc_lport_ptp_setup(struct fc_lport *lport,
lport->ptp_rp = NULL;
}
- lport->ptp_rp = fc_rport_rogue_create(&dp);
+ lport->ptp_rp = lport->tt.rport_create(&dp);
lport->tt.rport_login(lport->ptp_rp);
@@ -236,7 +242,7 @@ void fc_get_host_port_state(struct Scsi_Host *shost)
{
struct fc_lport *lp = shost_priv(shost);
- if ((lp->link_status & FC_LINK_UP) == FC_LINK_UP)
+ if (lp->link_up)
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
else
fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
@@ -253,10 +259,10 @@ EXPORT_SYMBOL(fc_get_host_speed);
struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
{
- int i;
struct fc_host_statistics *fcoe_stats;
struct fc_lport *lp = shost_priv(shost);
struct timespec v0, v1;
+ unsigned int cpu;
fcoe_stats = &lp->host_stats;
memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
@@ -265,10 +271,11 @@ struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
jiffies_to_timespec(lp->boot_time, &v1);
fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
- for_each_online_cpu(i) {
- struct fcoe_dev_stats *stats = lp->dev_stats[i];
- if (stats == NULL)
- continue;
+ for_each_possible_cpu(cpu) {
+ struct fcoe_dev_stats *stats;
+
+ stats = per_cpu_ptr(lp->dev_stats, cpu);
+
fcoe_stats->tx_frames += stats->TxFrames;
fcoe_stats->tx_words += stats->TxWords;
fcoe_stats->rx_frames += stats->RxFrames;
@@ -304,9 +311,8 @@ fc_lport_flogi_fill(struct fc_lport *lport, struct fc_els_flogi *flogi,
memset(flogi, 0, sizeof(*flogi));
flogi->fl_cmd = (u8) op;
- put_unaligned(htonll(lport->wwpn), &flogi->fl_wwpn);
- put_unaligned(htonll(lport->wwnn), &flogi->fl_wwnn);
-
+ put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
+ put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
sp = &flogi->fl_csp;
sp->sp_hi_ver = 0x20;
sp->sp_lo_ver = 0x20;
@@ -338,7 +344,7 @@ static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
}
/**
- * fc_lport_recv_rlir_req - Handle received Registered Link Incident Report.
+ * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
* @lport: Fibre Channel local port recieving the RLIR
* @sp: current sequence in the RLIR exchange
* @fp: RLIR request frame
@@ -349,15 +355,15 @@ static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
struct fc_lport *lport)
{
- FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
+ fc_lport_state(lport));
lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
fc_frame_free(fp);
}
/**
- * fc_lport_recv_echo_req - Handle received ECHO request
+ * fc_lport_recv_echo_req() - Handle received ECHO request
* @lport: Fibre Channel local port recieving the ECHO
* @sp: current sequence in the ECHO exchange
* @fp: ECHO request frame
@@ -375,8 +381,8 @@ static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
void *dp;
u32 f_ctl;
- FC_DEBUG_LPORT("Received RLIR request while in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
+ fc_lport_state(lport));
len = fr_len(in_fp) - sizeof(struct fc_frame_header);
pp = fc_frame_payload_get(in_fp, len);
@@ -399,7 +405,7 @@ static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
}
/**
- * fc_lport_recv_echo_req - Handle received Request Node ID data request
+ * fc_lport_recv_echo_req() - Handle received Request Node ID data request
* @lport: Fibre Channel local port recieving the RNID
* @sp: current sequence in the RNID exchange
* @fp: RNID request frame
@@ -423,8 +429,8 @@ static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
size_t len;
u32 f_ctl;
- FC_DEBUG_LPORT("Received RNID request while in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
+ fc_lport_state(lport));
req = fc_frame_payload_get(in_fp, sizeof(*req));
if (!req) {
@@ -466,16 +472,16 @@ static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
}
/**
- * fc_lport_recv_adisc_req - Handle received Address Discovery Request
+ * fc_lport_recv_adisc_req() - Handle received Address Discovery Request
* @lport: Fibre Channel local port recieving the ADISC
* @sp: current sequence in the ADISC exchange
* @fp: ADISC request frame
*
- * Locking Note: The lport lock is exected to be held before calling
+ * Locking Note: The lport lock is expected to be held before calling
* this function.
*/
static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp,
- struct fc_lport *lport)
+ struct fc_lport *lport)
{
struct fc_frame *fp;
struct fc_exch *ep = fc_seq_exch(sp);
@@ -484,8 +490,8 @@ static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp,
size_t len;
u32 f_ctl;
- FC_DEBUG_LPORT("Received ADISC request while in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received ADISC request while in state %s\n",
+ fc_lport_state(lport));
req = fc_frame_payload_get(in_fp, sizeof(*req));
if (!req) {
@@ -516,7 +522,7 @@ static void fc_lport_recv_adisc_req(struct fc_seq *sp, struct fc_frame *in_fp,
}
/**
- * fc_lport_recv_logo_req - Handle received fabric LOGO request
+ * fc_lport_recv_logo_req() - Handle received fabric LOGO request
* @lport: Fibre Channel local port recieving the LOGO
* @sp: current sequence in the LOGO exchange
* @fp: LOGO request frame
@@ -533,7 +539,7 @@ static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
}
/**
- * fc_fabric_login - Start the lport state machine
+ * fc_fabric_login() - Start the lport state machine
* @lport: The lport that should log into the fabric
*
* Locking Note: This function should not be called
@@ -555,17 +561,17 @@ int fc_fabric_login(struct fc_lport *lport)
EXPORT_SYMBOL(fc_fabric_login);
/**
- * fc_linkup - Handler for transport linkup events
+ * fc_linkup() - Handler for transport linkup events
* @lport: The lport whose link is up
*/
void fc_linkup(struct fc_lport *lport)
{
- FC_DEBUG_LPORT("Link is up for port (%6x)\n",
- fc_host_port_id(lport->host));
+ printk(KERN_INFO "libfc: Link up on port (%6x)\n",
+ fc_host_port_id(lport->host));
mutex_lock(&lport->lp_mutex);
- if ((lport->link_status & FC_LINK_UP) != FC_LINK_UP) {
- lport->link_status |= FC_LINK_UP;
+ if (!lport->link_up) {
+ lport->link_up = 1;
if (lport->state == LPORT_ST_RESET)
fc_lport_enter_flogi(lport);
@@ -575,17 +581,17 @@ void fc_linkup(struct fc_lport *lport)
EXPORT_SYMBOL(fc_linkup);
/**
- * fc_linkdown - Handler for transport linkdown events
+ * fc_linkdown() - Handler for transport linkdown events
* @lport: The lport whose link is down
*/
void fc_linkdown(struct fc_lport *lport)
{
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Link is down for port (%6x)\n",
- fc_host_port_id(lport->host));
+ printk(KERN_INFO "libfc: Link down on port (%6x)\n",
+ fc_host_port_id(lport->host));
- if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP) {
- lport->link_status &= ~(FC_LINK_UP);
+ if (lport->link_up) {
+ lport->link_up = 0;
fc_lport_enter_reset(lport);
lport->tt.fcp_cleanup(lport);
}
@@ -594,50 +600,30 @@ void fc_linkdown(struct fc_lport *lport)
EXPORT_SYMBOL(fc_linkdown);
/**
- * fc_pause - Pause the flow of frames
- * @lport: The lport to be paused
- */
-void fc_pause(struct fc_lport *lport)
-{
- mutex_lock(&lport->lp_mutex);
- lport->link_status |= FC_PAUSE;
- mutex_unlock(&lport->lp_mutex);
-}
-EXPORT_SYMBOL(fc_pause);
-
-/**
- * fc_unpause - Unpause the flow of frames
- * @lport: The lport to be unpaused
- */
-void fc_unpause(struct fc_lport *lport)
-{
- mutex_lock(&lport->lp_mutex);
- lport->link_status &= ~(FC_PAUSE);
- mutex_unlock(&lport->lp_mutex);
-}
-EXPORT_SYMBOL(fc_unpause);
-
-/**
- * fc_fabric_logoff - Logout of the fabric
+ * fc_fabric_logoff() - Logout of the fabric
* @lport: fc_lport pointer to logoff the fabric
*
* Return value:
* 0 for success, -1 for failure
- **/
+ */
int fc_fabric_logoff(struct fc_lport *lport)
{
lport->tt.disc_stop_final(lport);
mutex_lock(&lport->lp_mutex);
- kfree(lport->disc);
- lport->disc = NULL;
+ if (lport->dns_rp)
+ lport->tt.rport_logoff(lport->dns_rp);
+ mutex_unlock(&lport->lp_mutex);
+ lport->tt.rport_flush_queue();
+ mutex_lock(&lport->lp_mutex);
fc_lport_enter_logo(lport);
mutex_unlock(&lport->lp_mutex);
+ cancel_delayed_work_sync(&lport->retry_work);
return 0;
}
EXPORT_SYMBOL(fc_fabric_logoff);
/**
- * fc_lport_destroy - unregister a fc_lport
+ * fc_lport_destroy() - unregister a fc_lport
* @lport: fc_lport pointer to unregister
*
* Return value:
@@ -647,20 +633,34 @@ EXPORT_SYMBOL(fc_fabric_logoff);
* clean-up all the allocated memory
* and free up other system resources.
*
- **/
+ */
int fc_lport_destroy(struct fc_lport *lport)
{
+ mutex_lock(&lport->lp_mutex);
+ lport->state = LPORT_ST_NONE;
+ lport->link_up = 0;
lport->tt.frame_send = fc_frame_drop;
+ mutex_unlock(&lport->lp_mutex);
+
lport->tt.fcp_abort_io(lport);
- lport->tt.exch_mgr_reset(lport->emp, 0, 0);
+ lport->tt.exch_mgr_reset(lport, 0, 0);
return 0;
}
EXPORT_SYMBOL(fc_lport_destroy);
+/**
+ * fc_set_mfs() - sets up the mfs for the corresponding fc_lport
+ * @lport: fc_lport pointer to unregister
+ * @mfs: the new mfs for fc_lport
+ *
+ * Set mfs for the given fc_lport to the new mfs.
+ *
+ * Return: 0 for success
+ */
int fc_set_mfs(struct fc_lport *lport, u32 mfs)
{
unsigned int old_mfs;
- int rc = -1;
+ int rc = -EINVAL;
mutex_lock(&lport->lp_mutex);
@@ -668,7 +668,6 @@ int fc_set_mfs(struct fc_lport *lport, u32 mfs)
if (mfs >= FC_MIN_MAX_FRAME) {
mfs &= ~3;
- WARN_ON((size_t) mfs < FC_MIN_MAX_FRAME);
if (mfs > FC_MAX_FRAME)
mfs = FC_MAX_FRAME;
mfs -= sizeof(struct fc_frame_header);
@@ -686,7 +685,7 @@ int fc_set_mfs(struct fc_lport *lport, u32 mfs)
EXPORT_SYMBOL(fc_set_mfs);
/**
- * fc_lport_disc_callback - Callback for discovery events
+ * fc_lport_disc_callback() - Callback for discovery events
* @lport: FC local port
* @event: The discovery event
*/
@@ -694,12 +693,11 @@ void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
{
switch (event) {
case DISC_EV_SUCCESS:
- FC_DEBUG_LPORT("Got a SUCCESS event for port (%6x)\n",
- fc_host_port_id(lport->host));
+ FC_LPORT_DBG(lport, "Discovery succeeded\n");
break;
case DISC_EV_FAILED:
- FC_DEBUG_LPORT("Got a FAILED event for port (%6x)\n",
- fc_host_port_id(lport->host));
+ printk(KERN_ERR "libfc: Discovery failed for port (%6x)\n",
+ fc_host_port_id(lport->host));
mutex_lock(&lport->lp_mutex);
fc_lport_enter_reset(lport);
mutex_unlock(&lport->lp_mutex);
@@ -711,7 +709,7 @@ void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
}
/**
- * fc_rport_enter_ready - Enter the ready state and start discovery
+ * fc_rport_enter_ready() - Enter the ready state and start discovery
* @lport: Fibre Channel local port that is ready
*
* Locking Note: The lport lock is expected to be held before calling
@@ -719,8 +717,8 @@ void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
*/
static void fc_lport_enter_ready(struct fc_lport *lport)
{
- FC_DEBUG_LPORT("Port (%6x) entered Ready from state %s\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered READY from state %s\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_READY);
@@ -728,7 +726,7 @@ static void fc_lport_enter_ready(struct fc_lport *lport)
}
/**
- * fc_lport_recv_flogi_req - Receive a FLOGI request
+ * fc_lport_recv_flogi_req() - Receive a FLOGI request
* @sp_in: The sequence the FLOGI is on
* @rx_fp: The frame the FLOGI is in
* @lport: The lport that recieved the request
@@ -755,21 +753,21 @@ static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
u32 local_fid;
u32 f_ctl;
- FC_DEBUG_LPORT("Received FLOGI request while in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
+ fc_lport_state(lport));
fh = fc_frame_header_get(rx_fp);
remote_fid = ntoh24(fh->fh_s_id);
flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
if (!flp)
goto out;
- remote_wwpn = ntohll(get_unaligned(&flp->fl_wwpn));
+ remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
if (remote_wwpn == lport->wwpn) {
- FC_DBG("FLOGI from port with same WWPN %llx "
- "possible configuration error\n", remote_wwpn);
+ printk(KERN_WARNING "libfc: Received FLOGI from port "
+ "with same WWPN %llx\n", remote_wwpn);
goto out;
}
- FC_DBG("FLOGI from port WWPN %llx\n", remote_wwpn);
+ FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn);
/*
* XXX what is the right thing to do for FIDs?
@@ -808,7 +806,7 @@ static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
fc_lport_error(lport, fp);
}
fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
- ntohll(get_unaligned(&flp->fl_wwnn)));
+ get_unaligned_be64(&flp->fl_wwnn));
lport->tt.disc_start(fc_lport_disc_callback, lport);
@@ -818,7 +816,7 @@ out:
}
/**
- * fc_lport_recv_req - The generic lport request handler
+ * fc_lport_recv_req() - The generic lport request handler
* @lport: The lport that received the request
* @sp: The sequence the request is on
* @fp: The frame the request is in
@@ -888,10 +886,9 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
d_id = ntoh24(fh->fh_d_id);
rport = lport->tt.rport_lookup(lport, s_id);
- if (rport) {
+ if (rport)
lport->tt.rport_recv_req(sp, fp, rport);
- put_device(&rport->dev); /* hold from lookup */
- } else {
+ else {
rjt_data.fp = NULL;
rjt_data.reason = ELS_RJT_UNAB;
rjt_data.explan = ELS_EXPL_NONE;
@@ -902,7 +899,8 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
}
}
} else {
- FC_DBG("dropping invalid frame (eof %x)\n", fr_eof(fp));
+ FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
+ fr_eof(fp));
fc_frame_free(fp);
}
mutex_unlock(&lport->lp_mutex);
@@ -915,7 +913,7 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
}
/**
- * fc_lport_reset - Reset an lport
+ * fc_lport_reset() - Reset an lport
* @lport: The lport which should be reset
*
* Locking Note: This functions should not be called with the
@@ -923,6 +921,7 @@ static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
*/
int fc_lport_reset(struct fc_lport *lport)
{
+ cancel_delayed_work_sync(&lport->retry_work);
mutex_lock(&lport->lp_mutex);
fc_lport_enter_reset(lport);
mutex_unlock(&lport->lp_mutex);
@@ -931,7 +930,7 @@ int fc_lport_reset(struct fc_lport *lport)
EXPORT_SYMBOL(fc_lport_reset);
/**
- * fc_rport_enter_reset - Reset the local port
+ * fc_rport_enter_reset() - Reset the local port
* @lport: Fibre Channel local port to be reset
*
* Locking Note: The lport lock is expected to be held before calling
@@ -939,8 +938,8 @@ EXPORT_SYMBOL(fc_lport_reset);
*/
static void fc_lport_enter_reset(struct fc_lport *lport)
{
- FC_DEBUG_LPORT("Port (%6x) entered RESET state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_RESET);
@@ -954,16 +953,16 @@ static void fc_lport_enter_reset(struct fc_lport *lport)
lport->tt.disc_stop(lport);
- lport->tt.exch_mgr_reset(lport->emp, 0, 0);
+ lport->tt.exch_mgr_reset(lport, 0, 0);
fc_host_fabric_name(lport->host) = 0;
fc_host_port_id(lport->host) = 0;
- if ((lport->link_status & FC_LINK_UP) == FC_LINK_UP)
+ if (lport->link_up)
fc_lport_enter_flogi(lport);
}
/**
- * fc_lport_error - Handler for any errors
+ * fc_lport_error() - Handler for any errors
* @lport: The fc_lport object
* @fp: The frame pointer
*
@@ -974,44 +973,41 @@ static void fc_lport_enter_reset(struct fc_lport *lport)
static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
{
unsigned long delay = 0;
- FC_DEBUG_LPORT("Error %ld in state %s, retries %d\n",
- PTR_ERR(fp), fc_lport_state(lport),
- lport->retry_count);
+ FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
+ PTR_ERR(fp), fc_lport_state(lport),
+ lport->retry_count);
- if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
+ if (lport->retry_count < lport->max_retry_count) {
+ lport->retry_count++;
/*
- * Memory allocation failure, or the exchange timed out.
- * Retry after delay
+ * for frame alloc failures, different delay than e_d_tov
*/
- if (lport->retry_count < lport->max_retry_count) {
- lport->retry_count++;
- if (!fp)
- delay = msecs_to_jiffies(500);
- else
- delay = msecs_to_jiffies(lport->e_d_tov);
-
- schedule_delayed_work(&lport->retry_work, delay);
- } else {
- switch (lport->state) {
- case LPORT_ST_NONE:
- case LPORT_ST_READY:
- case LPORT_ST_RESET:
- case LPORT_ST_RPN_ID:
- case LPORT_ST_RFT_ID:
- case LPORT_ST_SCR:
- case LPORT_ST_DNS:
- case LPORT_ST_FLOGI:
- case LPORT_ST_LOGO:
- fc_lport_enter_reset(lport);
- break;
- }
+ if (!fp)
+ delay = msecs_to_jiffies(500);
+ else
+ delay = msecs_to_jiffies(lport->e_d_tov);
+
+ schedule_delayed_work(&lport->retry_work, delay);
+ } else {
+ switch (lport->state) {
+ case LPORT_ST_NONE:
+ case LPORT_ST_READY:
+ case LPORT_ST_RESET:
+ case LPORT_ST_RPN_ID:
+ case LPORT_ST_RFT_ID:
+ case LPORT_ST_SCR:
+ case LPORT_ST_DNS:
+ case LPORT_ST_FLOGI:
+ case LPORT_ST_LOGO:
+ fc_lport_enter_reset(lport);
+ break;
}
}
}
/**
- * fc_lport_rft_id_resp - Handle response to Register Fibre
- * Channel Types by ID (RPN_ID) request
+ * fc_lport_rft_id_resp() - Handle response to Register Fibre
+ * Channel Types by ID (RPN_ID) request
* @sp: current sequence in RPN_ID exchange
* @fp: response frame
* @lp_arg: Fibre Channel host port instance
@@ -1032,11 +1028,13 @@ static void fc_lport_rft_id_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Received a RFT_ID response\n");
+ FC_LPORT_DBG(lport, "Received a RFT_ID response\n");
if (lport->state != LPORT_ST_RFT_ID) {
- FC_DBG("Received a RFT_ID response, but in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received a RFT_ID response, but in state "
+ "%s\n", fc_lport_state(lport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -1062,8 +1060,8 @@ err:
}
/**
- * fc_lport_rpn_id_resp - Handle response to Register Port
- * Name by ID (RPN_ID) request
+ * fc_lport_rpn_id_resp() - Handle response to Register Port
+ * Name by ID (RPN_ID) request
* @sp: current sequence in RPN_ID exchange
* @fp: response frame
* @lp_arg: Fibre Channel host port instance
@@ -1084,11 +1082,13 @@ static void fc_lport_rpn_id_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Received a RPN_ID response\n");
+ FC_LPORT_DBG(lport, "Received a RPN_ID response\n");
if (lport->state != LPORT_ST_RPN_ID) {
- FC_DBG("Received a RPN_ID response, but in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received a RPN_ID response, but in state "
+ "%s\n", fc_lport_state(lport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -1114,7 +1114,7 @@ err:
}
/**
- * fc_lport_scr_resp - Handle response to State Change Register (SCR) request
+ * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
* @sp: current sequence in SCR exchange
* @fp: response frame
* @lp_arg: Fibre Channel lport port instance that sent the registration request
@@ -1134,11 +1134,13 @@ static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Received a SCR response\n");
+ FC_LPORT_DBG(lport, "Received a SCR response\n");
if (lport->state != LPORT_ST_SCR) {
- FC_DBG("Received a SCR response, but in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received a SCR response, but in state "
+ "%s\n", fc_lport_state(lport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -1160,7 +1162,7 @@ err:
}
/**
- * fc_lport_enter_scr - Send a State Change Register (SCR) request
+ * fc_lport_enter_scr() - Send a State Change Register (SCR) request
* @lport: Fibre Channel local port to register for state changes
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1170,8 +1172,8 @@ static void fc_lport_enter_scr(struct fc_lport *lport)
{
struct fc_frame *fp;
- FC_DEBUG_LPORT("Port (%6x) entered SCR state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_SCR);
@@ -1187,7 +1189,7 @@ static void fc_lport_enter_scr(struct fc_lport *lport)
}
/**
- * fc_lport_enter_rft_id - Register FC4-types with the name server
+ * fc_lport_enter_rft_id() - Register FC4-types with the name server
* @lport: Fibre Channel local port to register
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1199,8 +1201,8 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
struct fc_ns_fts *lps;
int i;
- FC_DEBUG_LPORT("Port (%6x) entered RFT_ID state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered RFT_ID state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_RFT_ID);
@@ -1229,7 +1231,7 @@ static void fc_lport_enter_rft_id(struct fc_lport *lport)
}
/**
- * fc_rport_enter_rft_id - Register port name with the name server
+ * fc_rport_enter_rft_id() - Register port name with the name server
* @lport: Fibre Channel local port to register
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1239,8 +1241,8 @@ static void fc_lport_enter_rpn_id(struct fc_lport *lport)
{
struct fc_frame *fp;
- FC_DEBUG_LPORT("Port (%6x) entered RPN_ID state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered RPN_ID state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_RPN_ID);
@@ -1257,8 +1259,12 @@ static void fc_lport_enter_rpn_id(struct fc_lport *lport)
fc_lport_error(lport, fp);
}
+static struct fc_rport_operations fc_lport_rport_ops = {
+ .event_callback = fc_lport_rport_callback,
+};
+
/**
- * fc_rport_enter_dns - Create a rport to the name server
+ * fc_rport_enter_dns() - Create a rport to the name server
* @lport: Fibre Channel local port requesting a rport for the name server
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1276,17 +1282,17 @@ static void fc_lport_enter_dns(struct fc_lport *lport)
dp.ids.roles = FC_RPORT_ROLE_UNKNOWN;
dp.lp = lport;
- FC_DEBUG_LPORT("Port (%6x) entered DNS state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_DNS);
- rport = fc_rport_rogue_create(&dp);
+ rport = lport->tt.rport_create(&dp);
if (!rport)
goto err;
rdata = rport->dd_data;
- rdata->event_callback = fc_lport_rport_event;
+ rdata->ops = &fc_lport_rport_ops;
lport->tt.rport_login(rport);
return;
@@ -1295,12 +1301,14 @@ err:
}
/**
- * fc_lport_timeout - Handler for the retry_work timer.
+ * fc_lport_timeout() - Handler for the retry_work timer.
* @work: The work struct of the fc_lport
*/
-static void fc_lport_timeout(void *data)
+static void fc_lport_timeout(struct work_struct *work)
{
- struct fc_lport *lport = data;
+ struct fc_lport *lport =
+ container_of(work, struct fc_lport,
+ retry_work.work);
mutex_lock(&lport->lp_mutex);
@@ -1334,7 +1342,7 @@ static void fc_lport_timeout(void *data)
}
/**
- * fc_lport_logo_resp - Handle response to LOGO request
+ * fc_lport_logo_resp() - Handle response to LOGO request
* @sp: current sequence in LOGO exchange
* @fp: response frame
* @lp_arg: Fibre Channel lport port instance that sent the LOGO request
@@ -1354,11 +1362,13 @@ static void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Received a LOGO response\n");
+ FC_LPORT_DBG(lport, "Received a LOGO response\n");
if (lport->state != LPORT_ST_LOGO) {
- FC_DBG("Received a LOGO response, but in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
+ "%s\n", fc_lport_state(lport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -1380,7 +1390,7 @@ err:
}
/**
- * fc_rport_enter_logo - Logout of the fabric
+ * fc_rport_enter_logo() - Logout of the fabric
* @lport: Fibre Channel local port to be logged out
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1391,15 +1401,11 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
struct fc_frame *fp;
struct fc_els_logo *logo;
- FC_DEBUG_LPORT("Port (%6x) entered LOGO state from %s state\n",
- fc_host_port_id(lport->host), fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_LOGO);
- /* DNS session should be closed so we can release it here */
- if (lport->dns_rp)
- lport->tt.rport_logoff(lport->dns_rp);
-
fp = fc_frame_alloc(lport, sizeof(*logo));
if (!fp) {
fc_lport_error(lport, fp);
@@ -1412,7 +1418,7 @@ static void fc_lport_enter_logo(struct fc_lport *lport)
}
/**
- * fc_lport_flogi_resp - Handle response to FLOGI request
+ * fc_lport_flogi_resp() - Handle response to FLOGI request
* @sp: current sequence in FLOGI exchange
* @fp: response frame
* @lp_arg: Fibre Channel lport port instance that sent the FLOGI request
@@ -1438,11 +1444,13 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&lport->lp_mutex);
- FC_DEBUG_LPORT("Received a FLOGI response\n");
+ FC_LPORT_DBG(lport, "Received a FLOGI response\n");
if (lport->state != LPORT_ST_FLOGI) {
- FC_DBG("Received a FLOGI response, but in state %s\n",
- fc_lport_state(lport));
+ FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
+ "%s\n", fc_lport_state(lport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -1455,7 +1463,8 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
did = ntoh24(fh->fh_d_id);
if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
- FC_DEBUG_LPORT("Assigned fid %x\n", did);
+ printk(KERN_INFO "libfc: Assigned FID (%6x) in FLOGI response\n",
+ did);
fc_host_port_id(lport->host) = did;
flp = fc_frame_payload_get(fp, sizeof(*flp));
@@ -1474,15 +1483,18 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
if (e_d_tov > lport->e_d_tov)
lport->e_d_tov = e_d_tov;
lport->r_a_tov = 2 * e_d_tov;
- FC_DBG("Point-to-Point mode\n");
+ printk(KERN_INFO "libfc: Port (%6x) entered "
+ "point to point mode\n", did);
fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id),
- ntohll(get_unaligned(&flp->fl_wwpn)),
- ntohll(get_unaligned(&flp->fl_wwnn)));
+ get_unaligned_be64(
+ &flp->fl_wwpn),
+ get_unaligned_be64(
+ &flp->fl_wwnn));
} else {
lport->e_d_tov = e_d_tov;
lport->r_a_tov = r_a_tov;
fc_host_fabric_name(lport->host) =
- ntohll(get_unaligned(&flp->fl_wwnn));
+ get_unaligned_be64(&flp->fl_wwnn);
fc_lport_enter_dns(lport);
}
}
@@ -1495,7 +1507,8 @@ static void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
}
}
} else {
- FC_DBG("bad FLOGI response\n");
+ FC_LPORT_DBG(lport, "Bad FLOGI response\n");
+ fc_lport_error(lport, fp);
}
out:
@@ -1505,7 +1518,7 @@ err:
}
/**
- * fc_rport_enter_flogi - Send a FLOGI request to the fabric manager
+ * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
* @lport: Fibre Channel local port to be logged in to the fabric
*
* Locking Note: The lport lock is expected to be held before calling
@@ -1515,7 +1528,8 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
{
struct fc_frame *fp;
- FC_DEBUG_LPORT("Processing FLOGI state\n");
+ FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
+ fc_lport_state(lport));
fc_lport_state_enter(lport, LPORT_ST_FLOGI);
@@ -1531,7 +1545,7 @@ void fc_lport_enter_flogi(struct fc_lport *lport)
/* Configure a fc_lport */
int fc_lport_config(struct fc_lport *lport)
{
- INIT_WORK(&lport->retry_work, fc_lport_timeout, lport);
+ INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
mutex_init(&lport->lp_mutex);
fc_lport_state_enter(lport, LPORT_ST_NONE);
diff --git a/drivers/scsi/libfc/fc_rport.c b/drivers/scsi/libfc/fc_rport.c
index db867dd..2eb89cd 100644
--- a/drivers/scsi/libfc/fc_rport.c
+++ b/drivers/scsi/libfc/fc_rport.c
@@ -18,20 +18,23 @@
*/
/*
+ * RPORT GENERAL INFO
+ *
* This file contains all processing regarding fc_rports. It contains the
* rport state machine and does all rport interaction with the transport class.
* There should be no other places in libfc that interact directly with the
* transport class in regards to adding and deleting rports.
*
* fc_rport's represent N_Port's within the fabric.
+ */
+
+/*
+ * RPORT LOCKING
*
- * rport locking notes:
- *
- * The rport should never hold the rport mutex and then lock the lport
- * mutex. The rport's mutex is considered lesser than the lport's mutex, so
- * the lport mutex can be held before locking the rport mutex, but not the
- * other way around. See the comment block at the top of fc_lport.c for more
- * details.
+ * The rport should never hold the rport mutex and then attempt to acquire
+ * either the lport or disc mutexes. The rport's mutex is considered lesser
+ * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for
+ * more comments on the heirarchy.
*
* The locking strategy is similar to the lport's strategy. The lock protects
* the rport's states and is held and released by the entry points to the rport
@@ -52,14 +55,6 @@
#include <scsi/libfc.h>
#include <scsi/fc_encode.h>
-static int fc_rport_debug;
-
-#define FC_DEBUG_RPORT(fmt...) \
- do { \
- if (fc_rport_debug) \
- FC_DBG(fmt); \
- } while (0)
-
struct workqueue_struct *rport_event_queue;
static void fc_rport_enter_plogi(struct fc_rport *);
@@ -76,9 +71,10 @@ static void fc_rport_recv_prlo_req(struct fc_rport *,
struct fc_seq *, struct fc_frame *);
static void fc_rport_recv_logo_req(struct fc_rport *,
struct fc_seq *, struct fc_frame *);
-static void fc_rport_timeout(void *);
+static void fc_rport_timeout(struct work_struct *);
static void fc_rport_error(struct fc_rport *, struct fc_frame *);
-static void fc_rport_work(void *);
+static void fc_rport_error_retry(struct fc_rport *, struct fc_frame *);
+static void fc_rport_work(struct work_struct *);
static const char *fc_rport_state_names[] = {
[RPORT_ST_NONE] = "None",
@@ -90,6 +86,13 @@ static const char *fc_rport_state_names[] = {
[RPORT_ST_LOGO] = "LOGO",
};
+static void fc_rport_rogue_destroy(struct device *dev)
+{
+ struct fc_rport *rport = dev_to_rport(dev);
+ FC_RPORT_DBG(rport, "Destroying rogue rport\n");
+ kfree(rport);
+}
+
struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
{
struct fc_rport *rport;
@@ -108,16 +111,11 @@ struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
rport->roles = dp->ids.roles;
rport->maxframe_size = FC_MIN_MAX_PAYLOAD;
/*
- * init the device, so other code can manipulate the rport as if
- * it came from the fc class. We also do an extra get because
- * libfc will free this rport instead of relying on the normal
- * refcounting.
- *
* Note: all this libfc rogue rport code will be removed for
* upstream so it fine that this is really ugly and hacky right now.
*/
device_initialize(&rport->dev);
- get_device(&rport->dev);
+ rport->dev.release = fc_rport_rogue_destroy;
mutex_init(&rdata->rp_mutex);
rdata->local_port = dp->lp;
@@ -125,11 +123,11 @@ struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
rdata->rp_state = RPORT_ST_INIT;
rdata->event = RPORT_EV_NONE;
rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
- rdata->event_callback = NULL;
+ rdata->ops = NULL;
rdata->e_d_tov = dp->lp->e_d_tov;
rdata->r_a_tov = dp->lp->r_a_tov;
- INIT_WORK(&rdata->retry_work, fc_rport_timeout, rdata);
- INIT_WORK(&rdata->event_work, fc_rport_work, rdata);
+ INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
+ INIT_WORK(&rdata->event_work, fc_rport_work);
/*
* For good measure, but not necessary as we should only
* add REAL rport to the lport list.
@@ -139,13 +137,8 @@ struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *dp)
return rport;
}
-void fc_rport_rogue_destroy(struct fc_rport *rport)
-{
- kfree(rport);
-}
-
/**
- * fc_rport_state - return a string for the state the rport is in
+ * fc_rport_state() - return a string for the state the rport is in
* @rport: The rport whose state we want to get a string for
*/
static const char *fc_rport_state(struct fc_rport *rport)
@@ -160,7 +153,7 @@ static const char *fc_rport_state(struct fc_rport *rport)
}
/**
- * fc_set_rport_loss_tmo - Set the remote port loss timeout in seconds.
+ * fc_set_rport_loss_tmo() - Set the remote port loss timeout in seconds.
* @rport: Pointer to Fibre Channel remote port structure
* @timeout: timeout in seconds
*/
@@ -174,12 +167,12 @@ void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
EXPORT_SYMBOL(fc_set_rport_loss_tmo);
/**
- * fc_plogi_get_maxframe - Get max payload from the common service parameters
+ * fc_plogi_get_maxframe() - Get max payload from the common service parameters
* @flp: FLOGI payload structure
* @maxval: upper limit, may be less than what is in the service parameters
*/
-static unsigned int
-fc_plogi_get_maxframe(struct fc_els_flogi *flp, unsigned int maxval)
+static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
+ unsigned int maxval)
{
unsigned int mfs;
@@ -197,7 +190,7 @@ fc_plogi_get_maxframe(struct fc_els_flogi *flp, unsigned int maxval)
}
/**
- * fc_rport_state_enter - Change the rport's state
+ * fc_rport_state_enter() - Change the rport's state
* @rport: The rport whose state should change
* @new: The new state of the rport
*
@@ -212,19 +205,20 @@ static void fc_rport_state_enter(struct fc_rport *rport,
rdata->rp_state = new;
}
-static void fc_rport_work(void *data)
+static void fc_rport_work(struct work_struct *work)
{
- struct fc_rport_libfc_priv *rdata = data;
- enum fc_lport_event event;
+ u32 port_id;
+ struct fc_rport_libfc_priv *rdata =
+ container_of(work, struct fc_rport_libfc_priv, event_work);
+ enum fc_rport_event event;
enum fc_rport_trans_state trans_state;
struct fc_lport *lport = rdata->local_port;
- void (*event_callback)(struct fc_lport *, struct fc_rport *,
- enum fc_lport_event);
+ struct fc_rport_operations *rport_ops;
struct fc_rport *rport = PRIV_TO_RPORT(rdata);
mutex_lock(&rdata->rp_mutex);
event = rdata->event;
- event_callback = rdata->event_callback;
+ rport_ops = rdata->ops;
if (event == RPORT_EV_CREATED) {
struct fc_rport *new_rport;
@@ -249,45 +243,52 @@ static void fc_rport_work(void *data)
new_rdata = new_rport->dd_data;
new_rdata->e_d_tov = rdata->e_d_tov;
new_rdata->r_a_tov = rdata->r_a_tov;
- new_rdata->event_callback = rdata->event_callback;
+ new_rdata->ops = rdata->ops;
new_rdata->local_port = rdata->local_port;
new_rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
new_rdata->trans_state = FC_PORTSTATE_REAL;
mutex_init(&new_rdata->rp_mutex);
- INIT_WORK(&new_rdata->retry_work, fc_rport_timeout,
- new_rdata);
- INIT_WORK(&new_rdata->event_work, fc_rport_work,
- new_rdata);
+ INIT_DELAYED_WORK(&new_rdata->retry_work,
+ fc_rport_timeout);
INIT_LIST_HEAD(&new_rdata->peers);
+ INIT_WORK(&new_rdata->event_work, fc_rport_work);
fc_rport_state_enter(new_rport, RPORT_ST_READY);
} else {
- FC_DBG("Failed to create the rport for port "
- "(%6x).\n", ids.port_id);
+ printk(KERN_WARNING "libfc: Failed to allocate "
+ " memory for rport (%6x)\n", ids.port_id);
event = RPORT_EV_FAILED;
}
- fc_rport_rogue_destroy(rport);
+ if (rport->port_id != FC_FID_DIR_SERV)
+ if (rport_ops->event_callback)
+ rport_ops->event_callback(lport, rport,
+ RPORT_EV_FAILED);
+ put_device(&rport->dev);
rport = new_rport;
rdata = new_rport->dd_data;
- if (event_callback)
- event_callback(lport, rport, event);
+ if (rport_ops->event_callback)
+ rport_ops->event_callback(lport, rport, event);
} else if ((event == RPORT_EV_FAILED) ||
(event == RPORT_EV_LOGO) ||
(event == RPORT_EV_STOP)) {
trans_state = rdata->trans_state;
mutex_unlock(&rdata->rp_mutex);
- if (event_callback)
- event_callback(lport, rport, event);
+ if (rport_ops->event_callback)
+ rport_ops->event_callback(lport, rport, event);
if (trans_state == FC_PORTSTATE_ROGUE)
- fc_rport_rogue_destroy(rport);
- else
+ put_device(&rport->dev);
+ else {
+ port_id = rport->port_id;
fc_remote_port_delete(rport);
+ lport->tt.exch_mgr_reset(lport, 0, port_id);
+ lport->tt.exch_mgr_reset(lport, port_id, 0);
+ }
} else
mutex_unlock(&rdata->rp_mutex);
}
/**
- * fc_rport_login - Start the remote port login state machine
+ * fc_rport_login() - Start the remote port login state machine
* @rport: Fibre Channel remote port
*
* Locking Note: Called without the rport lock held. This
@@ -300,7 +301,7 @@ int fc_rport_login(struct fc_rport *rport)
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Login to port (%6x)\n", rport->port_id);
+ FC_RPORT_DBG(rport, "Login to port\n");
fc_rport_enter_plogi(rport);
@@ -310,7 +311,7 @@ int fc_rport_login(struct fc_rport *rport)
}
/**
- * fc_rport_logoff - Logoff and remove an rport
+ * fc_rport_logoff() - Logoff and remove an rport
* @rport: Fibre Channel remote port to be removed
*
* Locking Note: Called without the rport lock held. This
@@ -323,7 +324,13 @@ int fc_rport_logoff(struct fc_rport *rport)
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Remove port (%6x)\n", rport->port_id);
+ FC_RPORT_DBG(rport, "Remove port\n");
+
+ if (rdata->rp_state == RPORT_ST_NONE) {
+ FC_RPORT_DBG(rport, "Port in NONE state, not removing\n");
+ mutex_unlock(&rdata->rp_mutex);
+ goto out;
+ }
fc_rport_enter_logo(rport);
@@ -335,8 +342,7 @@ int fc_rport_logoff(struct fc_rport *rport)
mutex_unlock(&rdata->rp_mutex);
- if (!cancel_delayed_work(&rdata->retry_work))
- flush_scheduled_work();
+ cancel_delayed_work_sync(&rdata->retry_work);
mutex_lock(&rdata->rp_mutex);
@@ -345,11 +351,12 @@ int fc_rport_logoff(struct fc_rport *rport)
mutex_unlock(&rdata->rp_mutex);
+out:
return 0;
}
/**
- * fc_rport_enter_ready - The rport is ready
+ * fc_rport_enter_ready() - The rport is ready
* @rport: Fibre Channel remote port that is ready
*
* Locking Note: The rport lock is expected to be held before calling
@@ -361,23 +368,24 @@ static void fc_rport_enter_ready(struct fc_rport *rport)
fc_rport_state_enter(rport, RPORT_ST_READY);
- FC_DEBUG_RPORT("Port (%6x) is Ready\n", rport->port_id);
+ FC_RPORT_DBG(rport, "Port is Ready\n");
rdata->event = RPORT_EV_CREATED;
queue_work(rport_event_queue, &rdata->event_work);
}
/**
- * fc_rport_timeout - Handler for the retry_work timer.
+ * fc_rport_timeout() - Handler for the retry_work timer.
* @work: The work struct of the fc_rport_libfc_priv
*
* Locking Note: Called without the rport lock held. This
* function will hold the rport lock, call an _enter_*
* function and then unlock the rport.
*/
-static void fc_rport_timeout(void *data)
+static void fc_rport_timeout(struct work_struct *work)
{
- struct fc_rport_libfc_priv *rdata = data;
+ struct fc_rport_libfc_priv *rdata =
+ container_of(work, struct fc_rport_libfc_priv, retry_work.work);
struct fc_rport *rport = PRIV_TO_RPORT(rdata);
mutex_lock(&rdata->rp_mutex);
@@ -400,65 +408,82 @@ static void fc_rport_timeout(void *data)
case RPORT_ST_NONE:
break;
}
- put_device(&rport->dev);
mutex_unlock(&rdata->rp_mutex);
+ put_device(&rport->dev);
}
/**
- * fc_rport_error - Handler for any errors
+ * fc_rport_error() - Error handler, called once retries have been exhausted
* @rport: The fc_rport object
* @fp: The frame pointer
*
- * If the error was caused by a resource allocation failure
- * then wait for half a second and retry, otherwise retry
- * immediately.
- *
* Locking Note: The rport lock is expected to be held before
* calling this routine
*/
static void fc_rport_error(struct fc_rport *rport, struct fc_frame *fp)
{
struct fc_rport_libfc_priv *rdata = rport->dd_data;
- unsigned long delay = 0;
- FC_DEBUG_RPORT("Error %ld in state %s, retries %d\n",
- PTR_ERR(fp), fc_rport_state(rport), rdata->retries);
+ FC_RPORT_DBG(rport, "Error %ld in state %s, retries %d\n",
+ PTR_ERR(fp), fc_rport_state(rport), rdata->retries);
- if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
- /*
- * Memory allocation failure, or the exchange timed out.
- * Retry after delay
- */
- if (rdata->retries < rdata->local_port->max_retry_count) {
- rdata->retries++;
- if (!fp)
- delay = msecs_to_jiffies(500);
- get_device(&rport->dev);
- schedule_delayed_work(&rdata->retry_work, delay);
- } else {
- switch (rdata->rp_state) {
- case RPORT_ST_PLOGI:
- case RPORT_ST_PRLI:
- case RPORT_ST_LOGO:
- rdata->event = RPORT_EV_FAILED;
- queue_work(rport_event_queue,
- &rdata->event_work);
- break;
- case RPORT_ST_RTV:
- fc_rport_enter_ready(rport);
- break;
- case RPORT_ST_NONE:
- case RPORT_ST_READY:
- case RPORT_ST_INIT:
- break;
- }
- }
+ switch (rdata->rp_state) {
+ case RPORT_ST_PLOGI:
+ case RPORT_ST_PRLI:
+ case RPORT_ST_LOGO:
+ rdata->event = RPORT_EV_FAILED;
+ fc_rport_state_enter(rport, RPORT_ST_NONE);
+ queue_work(rport_event_queue,
+ &rdata->event_work);
+ break;
+ case RPORT_ST_RTV:
+ fc_rport_enter_ready(rport);
+ break;
+ case RPORT_ST_NONE:
+ case RPORT_ST_READY:
+ case RPORT_ST_INIT:
+ break;
}
}
/**
- * fc_rport_plogi_recv_resp - Handle incoming ELS PLOGI response
+ * fc_rport_error_retry() - Error handler when retries are desired
+ * @rport: The fc_rport object
+ * @fp: The frame pointer
+ *
+ * If the error was an exchange timeout retry immediately,
+ * otherwise wait for E_D_TOV.
+ *
+ * Locking Note: The rport lock is expected to be held before
+ * calling this routine
+ */
+static void fc_rport_error_retry(struct fc_rport *rport, struct fc_frame *fp)
+{
+ struct fc_rport_libfc_priv *rdata = rport->dd_data;
+ unsigned long delay = FC_DEF_E_D_TOV;
+
+ /* make sure this isn't an FC_EX_CLOSED error, never retry those */
+ if (PTR_ERR(fp) == -FC_EX_CLOSED)
+ return fc_rport_error(rport, fp);
+
+ if (rdata->retries < rdata->local_port->max_rport_retry_count) {
+ FC_RPORT_DBG(rport, "Error %ld in state %s, retrying\n",
+ PTR_ERR(fp), fc_rport_state(rport));
+ rdata->retries++;
+ /* no additional delay on exchange timeouts */
+ if (PTR_ERR(fp) == -FC_EX_TIMEOUT)
+ delay = 0;
+ get_device(&rport->dev);
+ schedule_delayed_work(&rdata->retry_work, delay);
+ return;
+ }
+
+ return fc_rport_error(rport, fp);
+}
+
+/**
+ * fc_rport_plogi_recv_resp() - Handle incoming ELS PLOGI response
* @sp: current sequence in the PLOGI exchange
* @fp: response frame
* @rp_arg: Fibre Channel remote port
@@ -481,25 +506,26 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Received a PLOGI response from port (%6x)\n",
- rport->port_id);
+ FC_RPORT_DBG(rport, "Received a PLOGI response\n");
if (rdata->rp_state != RPORT_ST_PLOGI) {
- FC_DBG("Received a PLOGI response, but in state %s\n",
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received a PLOGI response, but in state "
+ "%s\n", fc_rport_state(rport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
if (IS_ERR(fp)) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
goto err;
}
op = fc_frame_payload_op(fp);
if (op == ELS_LS_ACC &&
(plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) {
- rport->port_name = ntohll(get_unaligned(&plp->fl_wwpn));
- rport->node_name = ntohll(get_unaligned(&plp->fl_wwnn));
+ rport->port_name = get_unaligned_be64(&plp->fl_wwpn);
+ rport->node_name = get_unaligned_be64(&plp->fl_wwnn);
tov = ntohl(plp->fl_csp.sp_e_d_tov);
if (ntohs(plp->fl_csp.sp_features) & FC_SP_FT_EDTR)
@@ -523,16 +549,17 @@ static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
else
fc_rport_enter_prli(rport);
} else
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
out:
fc_frame_free(fp);
err:
mutex_unlock(&rdata->rp_mutex);
+ put_device(&rport->dev);
}
/**
- * fc_rport_enter_plogi - Send Port Login (PLOGI) request to peer
+ * fc_rport_enter_plogi() - Send Port Login (PLOGI) request to peer
* @rport: Fibre Channel remote port to send PLOGI to
*
* Locking Note: The rport lock is expected to be held before calling
@@ -544,26 +571,28 @@ static void fc_rport_enter_plogi(struct fc_rport *rport)
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
- FC_DEBUG_RPORT("Port (%6x) entered PLOGI state from %s state\n",
- rport->port_id, fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Port entered PLOGI state from %s state\n",
+ fc_rport_state(rport));
fc_rport_state_enter(rport, RPORT_ST_PLOGI);
rport->maxframe_size = FC_MIN_MAX_PAYLOAD;
fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
if (!fp) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
return;
}
rdata->e_d_tov = lport->e_d_tov;
if (!lport->tt.elsct_send(lport, rport, fp, ELS_PLOGI,
fc_rport_plogi_resp, rport, lport->e_d_tov))
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
+ else
+ get_device(&rport->dev);
}
/**
- * fc_rport_prli_resp - Process Login (PRLI) response handler
+ * fc_rport_prli_resp() - Process Login (PRLI) response handler
* @sp: current sequence in the PRLI exchange
* @fp: response frame
* @rp_arg: Fibre Channel remote port
@@ -587,17 +616,18 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Received a PRLI response from port (%6x)\n",
- rport->port_id);
+ FC_RPORT_DBG(rport, "Received a PRLI response\n");
if (rdata->rp_state != RPORT_ST_PRLI) {
- FC_DBG("Received a PRLI response, but in state %s\n",
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received a PRLI response, but in state "
+ "%s\n", fc_rport_state(rport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
if (IS_ERR(fp)) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
goto err;
}
@@ -620,8 +650,9 @@ static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
fc_rport_enter_rtv(rport);
} else {
- FC_DBG("Bad ELS response\n");
+ FC_RPORT_DBG(rport, "Bad ELS response for PRLI command\n");
rdata->event = RPORT_EV_FAILED;
+ fc_rport_state_enter(rport, RPORT_ST_NONE);
queue_work(rport_event_queue, &rdata->event_work);
}
@@ -629,10 +660,11 @@ out:
fc_frame_free(fp);
err:
mutex_unlock(&rdata->rp_mutex);
+ put_device(&rport->dev);
}
/**
- * fc_rport_logo_resp - Logout (LOGO) response handler
+ * fc_rport_logo_resp() - Logout (LOGO) response handler
* @sp: current sequence in the LOGO exchange
* @fp: response frame
* @rp_arg: Fibre Channel remote port
@@ -650,26 +682,28 @@ static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Received a LOGO response from port (%6x)\n",
- rport->port_id);
-
- if (IS_ERR(fp)) {
- fc_rport_error(rport, fp);
- goto err;
- }
+ FC_RPORT_DBG(rport, "Received a LOGO response\n");
if (rdata->rp_state != RPORT_ST_LOGO) {
- FC_DEBUG_RPORT("Received a LOGO response, but in state %s\n",
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received a LOGO response, but in state "
+ "%s\n", fc_rport_state(rport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
+ if (IS_ERR(fp)) {
+ fc_rport_error_retry(rport, fp);
+ goto err;
+ }
+
op = fc_frame_payload_op(fp);
if (op == ELS_LS_ACC) {
fc_rport_enter_rtv(rport);
} else {
- FC_DBG("Bad ELS response\n");
+ FC_RPORT_DBG(rport, "Bad ELS response for LOGO command\n");
rdata->event = RPORT_EV_LOGO;
+ fc_rport_state_enter(rport, RPORT_ST_NONE);
queue_work(rport_event_queue, &rdata->event_work);
}
@@ -677,10 +711,11 @@ out:
fc_frame_free(fp);
err:
mutex_unlock(&rdata->rp_mutex);
+ put_device(&rport->dev);
}
/**
- * fc_rport_enter_prli - Send Process Login (PRLI) request to peer
+ * fc_rport_enter_prli() - Send Process Login (PRLI) request to peer
* @rport: Fibre Channel remote port to send PRLI to
*
* Locking Note: The rport lock is expected to be held before calling
@@ -696,24 +731,26 @@ static void fc_rport_enter_prli(struct fc_rport *rport)
} *pp;
struct fc_frame *fp;
- FC_DEBUG_RPORT("Port (%6x) entered PRLI state from %s state\n",
- rport->port_id, fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Port entered PRLI state from %s state\n",
+ fc_rport_state(rport));
fc_rport_state_enter(rport, RPORT_ST_PRLI);
fp = fc_frame_alloc(lport, sizeof(*pp));
if (!fp) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
return;
}
if (!lport->tt.elsct_send(lport, rport, fp, ELS_PRLI,
fc_rport_prli_resp, rport, lport->e_d_tov))
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
+ else
+ get_device(&rport->dev);
}
/**
- * fc_rport_els_rtv_resp - Request Timeout Value response handler
+ * fc_rport_els_rtv_resp() - Request Timeout Value response handler
* @sp: current sequence in the RTV exchange
* @fp: response frame
* @rp_arg: Fibre Channel remote port
@@ -733,12 +770,13 @@ static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
mutex_lock(&rdata->rp_mutex);
- FC_DEBUG_RPORT("Received a RTV response from port (%6x)\n",
- rport->port_id);
+ FC_RPORT_DBG(rport, "Received a RTV response\n");
if (rdata->rp_state != RPORT_ST_RTV) {
- FC_DBG("Received a RTV response, but in state %s\n",
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received a RTV response, but in state "
+ "%s\n", fc_rport_state(rport));
+ if (IS_ERR(fp))
+ goto err;
goto out;
}
@@ -775,10 +813,11 @@ out:
fc_frame_free(fp);
err:
mutex_unlock(&rdata->rp_mutex);
+ put_device(&rport->dev);
}
/**
- * fc_rport_enter_rtv - Send Request Timeout Value (RTV) request to peer
+ * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request to peer
* @rport: Fibre Channel remote port to send RTV to
*
* Locking Note: The rport lock is expected to be held before calling
@@ -790,24 +829,26 @@ static void fc_rport_enter_rtv(struct fc_rport *rport)
struct fc_rport_libfc_priv *rdata = rport->dd_data;
struct fc_lport *lport = rdata->local_port;
- FC_DEBUG_RPORT("Port (%6x) entered RTV state from %s state\n",
- rport->port_id, fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Port entered RTV state from %s state\n",
+ fc_rport_state(rport));
fc_rport_state_enter(rport, RPORT_ST_RTV);
fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
if (!fp) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
return;
}
if (!lport->tt.elsct_send(lport, rport, fp, ELS_RTV,
fc_rport_rtv_resp, rport, lport->e_d_tov))
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
+ else
+ get_device(&rport->dev);
}
/**
- * fc_rport_enter_logo - Send Logout (LOGO) request to peer
+ * fc_rport_enter_logo() - Send Logout (LOGO) request to peer
* @rport: Fibre Channel remote port to send LOGO to
*
* Locking Note: The rport lock is expected to be held before calling
@@ -819,25 +860,27 @@ static void fc_rport_enter_logo(struct fc_rport *rport)
struct fc_lport *lport = rdata->local_port;
struct fc_frame *fp;
- FC_DEBUG_RPORT("Port (%6x) entered LOGO state from %s state\n",
- rport->port_id, fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Port entered LOGO state from %s state\n",
+ fc_rport_state(rport));
fc_rport_state_enter(rport, RPORT_ST_LOGO);
fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
if (!fp) {
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
return;
}
if (!lport->tt.elsct_send(lport, rport, fp, ELS_LOGO,
fc_rport_logo_resp, rport, lport->e_d_tov))
- fc_rport_error(rport, fp);
+ fc_rport_error_retry(rport, fp);
+ else
+ get_device(&rport->dev);
}
/**
- * fc_rport_recv_req - Receive a request from a rport
+ * fc_rport_recv_req() - Receive a request from a rport
* @sp: current sequence in the PLOGI exchange
* @fp: response frame
* @rp_arg: Fibre Channel remote port
@@ -898,7 +941,7 @@ void fc_rport_recv_req(struct fc_seq *sp, struct fc_frame *fp,
}
/**
- * fc_rport_recv_plogi_req - Handle incoming Port Login (PLOGI) request
+ * fc_rport_recv_plogi_req() - Handle incoming Port Login (PLOGI) request
* @rport: Fibre Channel remote port that initiated PLOGI
* @sp: current sequence in the PLOGI exchange
* @fp: PLOGI request frame
@@ -925,21 +968,20 @@ static void fc_rport_recv_plogi_req(struct fc_rport *rport,
fh = fc_frame_header_get(fp);
- FC_DEBUG_RPORT("Received PLOGI request from port (%6x) "
- "while in state %s\n", ntoh24(fh->fh_s_id),
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received PLOGI request while in state %s\n",
+ fc_rport_state(rport));
sid = ntoh24(fh->fh_s_id);
pl = fc_frame_payload_get(fp, sizeof(*pl));
if (!pl) {
- FC_DBG("incoming PLOGI from %x too short\n", sid);
+ FC_RPORT_DBG(rport, "Received PLOGI too short\n");
WARN_ON(1);
/* XXX TBD: send reject? */
fc_frame_free(fp);
return;
}
- wwpn = ntohll(get_unaligned(&pl->fl_wwpn));
- wwnn = ntohll(get_unaligned(&pl->fl_wwnn));
+ wwpn = get_unaligned_be64(&pl->fl_wwpn);
+ wwnn = get_unaligned_be64(&pl->fl_wwnn);
/*
* If the session was just created, possibly due to the incoming PLOGI,
@@ -954,26 +996,28 @@ static void fc_rport_recv_plogi_req(struct fc_rport *rport,
*/
switch (rdata->rp_state) {
case RPORT_ST_INIT:
- FC_DEBUG_RPORT("incoming PLOGI from %6x wwpn %llx state INIT "
- "- reject\n", sid, wwpn);
+ FC_RPORT_DBG(rport, "Received PLOGI, wwpn %llx state INIT "
+ "- reject\n", (unsigned long long)wwpn);
reject = ELS_RJT_UNSUP;
break;
case RPORT_ST_PLOGI:
- FC_DEBUG_RPORT("incoming PLOGI from %x in PLOGI state %d\n",
- sid, rdata->rp_state);
+ FC_RPORT_DBG(rport, "Received PLOGI in PLOGI state %d\n",
+ rdata->rp_state);
if (wwpn < lport->wwpn)
reject = ELS_RJT_INPROG;
break;
case RPORT_ST_PRLI:
case RPORT_ST_READY:
- FC_DEBUG_RPORT("incoming PLOGI from %x in logged-in state %d "
- "- ignored for now\n", sid, rdata->rp_state);
+ FC_RPORT_DBG(rport, "Received PLOGI in logged-in state %d "
+ "- ignored for now\n", rdata->rp_state);
/* XXX TBD - should reset */
break;
case RPORT_ST_NONE:
default:
- FC_DEBUG_RPORT("incoming PLOGI from %x in unexpected "
- "state %d\n", sid, rdata->rp_state);
+ FC_RPORT_DBG(rport, "Received PLOGI in unexpected "
+ "state %d\n", rdata->rp_state);
+ fc_frame_free(fp);
+ return;
break;
}
@@ -1020,7 +1064,7 @@ static void fc_rport_recv_plogi_req(struct fc_rport *rport,
}
/**
- * fc_rport_recv_prli_req - Handle incoming Process Login (PRLI) request
+ * fc_rport_recv_prli_req() - Handle incoming Process Login (PRLI) request
* @rport: Fibre Channel remote port that initiated PRLI
* @sp: current sequence in the PRLI exchange
* @fp: PRLI request frame
@@ -1055,9 +1099,8 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
fh = fc_frame_header_get(rx_fp);
- FC_DEBUG_RPORT("Received PRLI request from port (%6x) "
- "while in state %s\n", ntoh24(fh->fh_s_id),
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received PRLI request while in state %s\n",
+ fc_rport_state(rport));
switch (rdata->rp_state) {
case RPORT_ST_PRLI:
@@ -1065,6 +1108,8 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
reason = ELS_RJT_NONE;
break;
default:
+ fc_frame_free(rx_fp);
+ return;
break;
}
len = fr_len(rx_fp) - sizeof(*fh);
@@ -1171,7 +1216,7 @@ static void fc_rport_recv_prli_req(struct fc_rport *rport,
}
/**
- * fc_rport_recv_prlo_req - Handle incoming Process Logout (PRLO) request
+ * fc_rport_recv_prlo_req() - Handle incoming Process Logout (PRLO) request
* @rport: Fibre Channel remote port that initiated PRLO
* @sp: current sequence in the PRLO exchange
* @fp: PRLO request frame
@@ -1190,9 +1235,13 @@ static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp,
fh = fc_frame_header_get(fp);
- FC_DEBUG_RPORT("Received PRLO request from port (%6x) "
- "while in state %s\n", ntoh24(fh->fh_s_id),
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received PRLO request while in state %s\n",
+ fc_rport_state(rport));
+
+ if (rdata->rp_state == RPORT_ST_NONE) {
+ fc_frame_free(fp);
+ return;
+ }
rjt_data.fp = NULL;
rjt_data.reason = ELS_RJT_UNAB;
@@ -1202,7 +1251,7 @@ static void fc_rport_recv_prlo_req(struct fc_rport *rport, struct fc_seq *sp,
}
/**
- * fc_rport_recv_logo_req - Handle incoming Logout (LOGO) request
+ * fc_rport_recv_logo_req() - Handle incoming Logout (LOGO) request
* @rport: Fibre Channel remote port that initiated LOGO
* @sp: current sequence in the LOGO exchange
* @fp: LOGO request frame
@@ -1219,11 +1268,16 @@ static void fc_rport_recv_logo_req(struct fc_rport *rport, struct fc_seq *sp,
fh = fc_frame_header_get(fp);
- FC_DEBUG_RPORT("Received LOGO request from port (%6x) "
- "while in state %s\n", ntoh24(fh->fh_s_id),
- fc_rport_state(rport));
+ FC_RPORT_DBG(rport, "Received LOGO request while in state %s\n",
+ fc_rport_state(rport));
+
+ if (rdata->rp_state == RPORT_ST_NONE) {
+ fc_frame_free(fp);
+ return;
+ }
rdata->event = RPORT_EV_LOGO;
+ fc_rport_state_enter(rport, RPORT_ST_NONE);
queue_work(rport_event_queue, &rdata->event_work);
lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
@@ -1235,9 +1289,11 @@ static void fc_rport_flush_queue(void)
flush_workqueue(rport_event_queue);
}
-
int fc_rport_init(struct fc_lport *lport)
{
+ if (!lport->tt.rport_create)
+ lport->tt.rport_create = fc_rport_rogue_create;
+
if (!lport->tt.rport_login)
lport->tt.rport_login = fc_rport_login;
@@ -1274,7 +1330,7 @@ void fc_rport_terminate_io(struct fc_rport *rport)
struct fc_rport_libfc_priv *rdata = rport->dd_data;
struct fc_lport *lport = rdata->local_port;
- lport->tt.exch_mgr_reset(lport->emp, 0, rport->port_id);
- lport->tt.exch_mgr_reset(lport->emp, rport->port_id, 0);
+ lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
+ lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
}
EXPORT_SYMBOL(fc_rport_terminate_io);
diff --git a/include/linux/if_ether.h b/include/linux/if_ether.h
index ab08f35..95fcd8c 100644
--- a/include/linux/if_ether.h
+++ b/include/linux/if_ether.h
@@ -74,6 +74,7 @@
*/
#define ETH_P_AOE 0x88A2 /* ATA over Ethernet */
#define ETH_P_TIPC 0x88CA /* TIPC */
+#define ETH_P_FCOE 0x8906 /* Fibre Channel over Ethernet */
/*
* Non DIX types. Won't clash for 1500 types.
diff --git a/include/scsi/fc/fc_fcoe.h b/include/scsi/fc/fc_fcoe.h
index a6118a2..ccb3dbe 100644
--- a/include/scsi/fc/fc_fcoe.h
+++ b/include/scsi/fc/fc_fcoe.h
@@ -25,17 +25,6 @@
*/
/*
- * The FCoE ethertype eventually goes in net/if_ether.h.
- */
-#ifndef ETH_P_FCOE
-#define ETH_P_FCOE 0x8906 /* FCOE ether type */
-#endif
-
-#ifndef ETH_P_8021Q
-#define ETH_P_8021Q 0x8100
-#endif
-
-/*
* FC_FCOE_OUI hasn't been standardized yet. XXX TBD.
*/
#ifndef FC_FCOE_OUI
@@ -85,6 +74,18 @@ struct fcoe_crc_eof {
} __attribute__((packed));
/*
+ * Minimum FCoE + FC header length
+ * 14 bytes FCoE header + 24 byte FC header = 38 bytes
+ */
+#define FCOE_HEADER_LEN 38
+
+/*
+ * Minimum FCoE frame size
+ * 14 bytes FCoE header + 24 byte FC header + 8 byte FCoE trailer = 46 bytes
+ */
+#define FCOE_MIN_FRAME 46
+
+/*
* fc_fcoe_set_mac - Store OUI + DID into MAC address field.
* @mac: mac address to be set
* @did: fc dest id to use
diff --git a/include/scsi/fc/fc_fip.h b/include/scsi/fc/fc_fip.h
new file mode 100644
index 0000000..0627a9a
--- /dev/null
+++ b/include/scsi/fc/fc_fip.h
@@ -0,0 +1,237 @@
+/*
+ * Copyright 2008 Cisco Systems, Inc. All rights reserved.
+ *
+ * This program is free software; you may redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef _FC_FIP_H_
+#define _FC_FIP_H_
+
+/*
+ * This version is based on:
+ * http://www.t11.org/ftp/t11/pub/fc/bb-5/08-543v1.pdf
+ */
+
+/*
+ * The FIP ethertype eventually goes in net/if_ether.h.
+ */
+#ifndef ETH_P_FIP
+#define ETH_P_FIP 0x8914 /* FIP Ethertype */
+#endif
+
+#define FIP_DEF_PRI 128 /* default selection priority */
+#define FIP_DEF_FC_MAP 0x0efc00 /* default FCoE MAP (MAC OUI) value */
+#define FIP_DEF_FKA 8000 /* default FCF keep-alive/advert period (mS) */
+#define FIP_VN_KA_PERIOD 90000 /* required VN_port keep-alive period (mS) */
+#define FIP_FCF_FUZZ 100 /* random time added by FCF (mS) */
+
+/*
+ * Multicast MAC addresses. T11-adopted.
+ */
+#define FIP_ALL_FCOE_MACS ((u8[6]) { 1, 0x10, 0x18, 1, 0, 0 })
+#define FIP_ALL_ENODE_MACS ((u8[6]) { 1, 0x10, 0x18, 1, 0, 1 })
+#define FIP_ALL_FCF_MACS ((u8[6]) { 1, 0x10, 0x18, 1, 0, 2 })
+
+#define FIP_VER 1 /* version for fip_header */
+
+struct fip_header {
+ __u8 fip_ver; /* upper 4 bits are the version */
+ __u8 fip_resv1; /* reserved */
+ __be16 fip_op; /* operation code */
+ __u8 fip_resv2; /* reserved */
+ __u8 fip_subcode; /* lower 4 bits are sub-code */
+ __be16 fip_dl_len; /* length of descriptors in words */
+ __be16 fip_flags; /* header flags */
+} __attribute__((packed));
+
+#define FIP_VER_SHIFT 4
+#define FIP_VER_ENCAPS(v) ((v) << FIP_VER_SHIFT)
+#define FIP_VER_DECAPS(v) ((v) >> FIP_VER_SHIFT)
+#define FIP_BPW 4 /* bytes per word for lengths */
+
+/*
+ * fip_op.
+ */
+enum fip_opcode {
+ FIP_OP_DISC = 1, /* discovery, advertisement, etc. */
+ FIP_OP_LS = 2, /* Link Service request or reply */
+ FIP_OP_CTRL = 3, /* Keep Alive / Link Reset */
+ FIP_OP_VLAN = 4, /* VLAN discovery */
+ FIP_OP_VENDOR_MIN = 0xfff8, /* min vendor-specific opcode */
+ FIP_OP_VENDOR_MAX = 0xfffe, /* max vendor-specific opcode */
+};
+
+/*
+ * Subcodes for FIP_OP_DISC.
+ */
+enum fip_disc_subcode {
+ FIP_SC_SOL = 1, /* solicitation */
+ FIP_SC_ADV = 2, /* advertisement */
+};
+
+/*
+ * Subcodes for FIP_OP_LS.
+ */
+enum fip_trans_subcode {
+ FIP_SC_REQ = 1, /* request */
+ FIP_SC_REP = 2, /* reply */
+};
+
+/*
+ * Subcodes for FIP_OP_RESET.
+ */
+enum fip_reset_subcode {
+ FIP_SC_KEEP_ALIVE = 1, /* keep-alive from VN_Port */
+ FIP_SC_CLR_VLINK = 2, /* clear virtual link from VF_Port */
+};
+
+/*
+ * Subcodes for FIP_OP_VLAN.
+ */
+enum fip_vlan_subcode {
+ FIP_SC_VL_REQ = 1, /* request */
+ FIP_SC_VL_REP = 2, /* reply */
+};
+
+/*
+ * flags in header fip_flags.
+ */
+enum fip_flag {
+ FIP_FL_FPMA = 0x8000, /* supports FPMA fabric-provided MACs */
+ FIP_FL_SPMA = 0x4000, /* supports SPMA server-provided MACs */
+ FIP_FL_AVAIL = 0x0004, /* available for FLOGI/ELP */
+ FIP_FL_SOL = 0x0002, /* this is a solicited message */
+ FIP_FL_FPORT = 0x0001, /* sent from an F port */
+};
+
+/*
+ * Common descriptor header format.
+ */
+struct fip_desc {
+ __u8 fip_dtype; /* type - see below */
+ __u8 fip_dlen; /* length - in 32-bit words */
+};
+
+enum fip_desc_type {
+ FIP_DT_PRI = 1, /* priority for forwarder selection */
+ FIP_DT_MAC = 2, /* MAC address */
+ FIP_DT_MAP_OUI = 3, /* FC-MAP OUI */
+ FIP_DT_NAME = 4, /* switch name or node name */
+ FIP_DT_FAB = 5, /* fabric descriptor */
+ FIP_DT_FCOE_SIZE = 6, /* max FCoE frame size */
+ FIP_DT_FLOGI = 7, /* FLOGI request or response */
+ FIP_DT_FDISC = 8, /* FDISC request or response */
+ FIP_DT_LOGO = 9, /* LOGO request or response */
+ FIP_DT_ELP = 10, /* ELP request or response */
+ FIP_DT_VN_ID = 11, /* VN_Node Identifier */
+ FIP_DT_FKA = 12, /* advertisement keep-alive period */
+ FIP_DT_VENDOR = 13, /* vendor ID */
+ FIP_DT_VLAN = 14, /* vlan number */
+ FIP_DT_LIMIT, /* max defined desc_type + 1 */
+ FIP_DT_VENDOR_BASE = 128, /* first vendor-specific desc_type */
+};
+
+/*
+ * FIP_DT_PRI - priority descriptor.
+ */
+struct fip_pri_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd;
+ __u8 fd_pri; /* FCF priority: higher is better */
+} __attribute__((packed));
+
+/*
+ * FIP_DT_MAC - MAC address descriptor.
+ */
+struct fip_mac_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_mac[ETH_ALEN];
+} __attribute__((packed));
+
+/*
+ * FIP_DT_MAP - descriptor.
+ */
+struct fip_map_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd[3];
+ __u8 fd_map[3];
+} __attribute__((packed));
+
+/*
+ * FIP_DT_NAME descriptor.
+ */
+struct fip_wwn_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd[2];
+ __be64 fd_wwn; /* 64-bit WWN, unaligned */
+} __attribute__((packed));
+
+/*
+ * FIP_DT_FAB descriptor.
+ */
+struct fip_fab_desc {
+ struct fip_desc fd_desc;
+ __be16 fd_vfid; /* virtual fabric ID */
+ __u8 fd_resvd;
+ __u8 fd_map[3]; /* FC-MAP value */
+ __be64 fd_wwn; /* fabric name, unaligned */
+} __attribute__((packed));
+
+/*
+ * FIP_DT_FCOE_SIZE descriptor.
+ */
+struct fip_size_desc {
+ struct fip_desc fd_desc;
+ __be16 fd_size;
+} __attribute__((packed));
+
+/*
+ * Descriptor that encapsulates an ELS or ILS frame.
+ * The encapsulated frame immediately follows this header, without
+ * SOF, EOF, or CRC.
+ */
+struct fip_encaps {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd[2];
+} __attribute__((packed));
+
+/*
+ * FIP_DT_VN_ID - VN_Node Identifier descriptor.
+ */
+struct fip_vn_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_mac[ETH_ALEN];
+ __u8 fd_resvd;
+ __u8 fd_fc_id[3];
+ __be64 fd_wwpn; /* port name, unaligned */
+} __attribute__((packed));
+
+/*
+ * FIP_DT_FKA - Advertisement keep-alive period.
+ */
+struct fip_fka_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd[2];
+ __be32 fd_fka_period; /* adv./keep-alive period in mS */
+} __attribute__((packed));
+
+/*
+ * FIP_DT_VENDOR descriptor.
+ */
+struct fip_vendor_desc {
+ struct fip_desc fd_desc;
+ __u8 fd_resvd[2];
+ __u8 fd_vendor_id[8];
+} __attribute__((packed));
+
+#endif /* _FC_FIP_H_ */
diff --git a/include/scsi/fc/fc_fs.h b/include/scsi/fc/fc_fs.h
index 3e4801d..1b7af3a 100644
--- a/include/scsi/fc/fc_fs.h
+++ b/include/scsi/fc/fc_fs.h
@@ -337,4 +337,9 @@ enum fc_pf_rjt_reason {
FC_RJT_VENDOR = 0xff, /* vendor specific reject */
};
+/* default timeout values */
+
+#define FC_DEF_E_D_TOV 2000UL
+#define FC_DEF_R_A_TOV 10000UL
+
#endif /* _FC_FS_H_ */
diff --git a/include/scsi/fc_compat.h b/include/scsi/fc_compat.h
new file mode 100644
index 0000000..9f9f14f
--- /dev/null
+++ b/include/scsi/fc_compat.h
@@ -0,0 +1,104 @@
+/*
+ * Compat helpers for libfc
+ */
+#ifndef _FC_COMPAT_H_
+#define _FC_COMPAT_H_
+
+#include <asm/unaligned.h>
+#include <linux/workqueue.h>
+#include <linux/scatterlist.h>
+#include <linux/if_ether.h>
+
+#ifndef for_each_sg
+#define for_each_sg(sglist, __sg, nr, __i) \
+ for (__i = 0, __sg = (sglist); __i < (nr); __i++, __sg = sg_next(__sg))
+
+static inline struct scatterlist *sg_next(struct scatterlist *sg)
+{
+ if (!sg)
+ return NULL;
+ return sg + 1;
+}
+
+static inline struct page *sg_page(struct scatterlist *sg)
+{
+ return sg->page;
+}
+#endif
+
+#define BIT(nr) (1UL << (nr))
+
+#define MAC_FMT "%02x:%02x:%02x:%02x:%02x:%02x"
+#define MAC_BUF_SIZE 18
+#define DECLARE_MAC_BUF(var) char var[MAC_BUF_SIZE]
+
+static size_t _format_mac_addr(char *buf, int buflen,
+ const unsigned char *addr, int len)
+{
+ int i;
+ char *cp = buf;
+
+ for (i = 0; i < len; i++) {
+ cp += scnprintf(cp, buflen - (cp - buf), "%02x", addr[i]);
+ if (i == len - 1)
+ break;
+ cp += strlcpy(cp, ":", buflen - (cp - buf));
+ }
+ return cp - buf;
+}
+
+static inline char *print_mac(char *buf, const unsigned char *addr)
+{
+ _format_mac_addr(buf, MAC_BUF_SIZE, addr, ETH_ALEN);
+ return buf;
+}
+
+#define dev_get_by_name(_inet, _name) dev_get_by_name(_name)
+
+#define vlan_dev_real_dev(_ndev) VLAN_DEV_INFO(_ndev)->real_dev
+
+#define put_unaligned_be64(_val, _ptr) put_unaligned(cpu_to_be64(_val), _ptr)
+#define get_unaligned_be64(_ptr) be64_to_cpu(get_unaligned(_ptr))
+
+#define kmem_cache_create(_name, _size, _align, _flags, _ctor) \
+ kmem_cache_create(_name, _size, _align, _flags, _ctor, NULL)
+
+#define flush_work(_wk) flush_scheduled_work()
+
+struct delayed_work {
+ struct work_struct work;
+};
+
+static inline int cancel_delayed_work_sync(struct delayed_work *dwork)
+{
+ int ret;
+
+ ret = cancel_delayed_work(&dwork->work);
+ if (!ret)
+ flush_scheduled_work();
+ return ret;
+}
+
+#define cancel_delayed_work(_dwork) cancel_delayed_work(&(_dwork)->work)
+
+static inline int schedule_delayed_work_compat(struct delayed_work *work,
+ unsigned long delay)
+{
+ if (likely(!delay))
+ return schedule_work(&work->work);
+ else
+ return schedule_delayed_work(&work->work, delay);
+}
+
+static inline void INIT_WORK_compat(struct work_struct *work, void *func)
+{
+ INIT_WORK(work, func, work);
+}
+
+#undef INIT_WORK
+#define INIT_WORK(_work, _func) INIT_WORK_compat(_work, _func)
+#define INIT_DELAYED_WORK(_work,_func) INIT_WORK(&(_work)->work, _func)
+
+#define schedule_delayed_work schedule_delayed_work_compat
+
+#endif
diff --git a/include/scsi/fc_encode.h b/include/scsi/fc_encode.h
index a09df7a..7cc2aa7 100644
--- a/include/scsi/fc_encode.h
+++ b/include/scsi/fc_encode.h
@@ -20,6 +20,7 @@
#ifndef _FC_ENCODE_H_
#define _FC_ENCODE_H_
#include <asm/unaligned.h>
+#include <scsi/fc_compat.h>
struct fc_ns_rft {
struct fc_ns_fid fid; /* port ID object */
@@ -103,11 +104,10 @@ static inline int fc_ct_fill(struct fc_lport *lport, struct fc_frame *fp,
hton24(ct->payload.rn.fr_fid.fp_fid,
fc_host_port_id(lport->host));
ct->payload.rft.fts = lport->fcts;
- put_unaligned(htonll(lport->wwpn), &ct->payload.rn.fr_wwn);
+ put_unaligned_be64(lport->wwpn, &ct->payload.rn.fr_wwn);
break;
default:
- FC_DBG("Invalid op code %x \n", op);
return -EINVAL;
}
*r_ctl = FC_RCTL_DD_UNSOL_CTL;
@@ -129,8 +129,9 @@ static inline void fc_plogi_fill(struct fc_lport *lport, struct fc_frame *fp,
plogi = fc_frame_payload_get(fp, sizeof(*plogi));
memset(plogi, 0, sizeof(*plogi));
plogi->fl_cmd = (u8) op;
- put_unaligned(htonll(lport->wwpn), &plogi->fl_wwpn);
- put_unaligned(htonll(lport->wwnn), &plogi->fl_wwnn);
+ put_unaligned_be64(lport->wwpn, &plogi->fl_wwpn);
+ put_unaligned_be64(lport->wwnn, &plogi->fl_wwnn);
+
csp = &plogi->fl_csp;
csp->sp_hi_ver = 0x20;
csp->sp_lo_ver = 0x20;
@@ -160,8 +161,8 @@ static inline void fc_flogi_fill(struct fc_lport *lport, struct fc_frame *fp)
flogi = fc_frame_payload_get(fp, sizeof(*flogi));
memset(flogi, 0, sizeof(*flogi));
flogi->fl_cmd = (u8) ELS_FLOGI;
- put_unaligned(htonll(lport->wwpn), &flogi->fl_wwpn);
- put_unaligned(htonll(lport->wwnn), &flogi->fl_wwnn);
+ put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
+ put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
sp = &flogi->fl_csp;
sp->sp_hi_ver = 0x20;
sp->sp_lo_ver = 0x20;
@@ -297,7 +298,6 @@ static inline int fc_els_fill(struct fc_lport *lport, struct fc_rport *rport,
break;
default:
- FC_DBG("Invalid op code %x \n", op);
return -EINVAL;
}
diff --git a/include/scsi/fc_frame.h b/include/scsi/fc_frame.h
index dc5f734..5951105 100644
--- a/include/scsi/fc_frame.h
+++ b/include/scsi/fc_frame.h
@@ -54,8 +54,8 @@
#define fr_eof(fp) (fr_cb(fp)->fr_eof)
#define fr_flags(fp) (fr_cb(fp)->fr_flags)
#define fr_max_payload(fp) (fr_cb(fp)->fr_max_payload)
-#define fr_cmd(fp) (fr_cb(fp)->fr_cmd)
-#define fr_dir(fp) (fr_cmd(fp)->sc_data_direction)
+#define fr_fsp(fp) (fr_cb(fp)->fr_fsp)
+#define fr_crc(fp) (fr_cb(fp)->fr_crc)
struct fc_frame {
struct sk_buff skb;
@@ -65,13 +65,15 @@ struct fcoe_rcv_info {
struct packet_type *ptype;
struct fc_lport *fr_dev; /* transport layer private pointer */
struct fc_seq *fr_seq; /* for use with exchange manager */
- struct scsi_cmnd *fr_cmd; /* for use of scsi command */
+ struct fc_fcp_pkt *fr_fsp; /* for the corresponding fcp I/O */
+ u32 fr_crc;
+ u16 fr_max_payload; /* max FC payload */
enum fc_sof fr_sof; /* start of frame delimiter */
enum fc_eof fr_eof; /* end of frame delimiter */
u8 fr_flags; /* flags - see below */
- u16 fr_max_payload; /* max FC payload */
};
+
/*
* Get fc_frame pointer for an skb that's already been imported.
*/
@@ -215,20 +217,6 @@ static inline bool fc_frame_is_cmd(const struct fc_frame *fp)
return fc_frame_rctl(fp) == FC_RCTL_DD_UNSOL_CMD;
}
-static inline bool fc_frame_is_read(const struct fc_frame *fp)
-{
- if (fc_frame_is_cmd(fp) && fr_cmd(fp))
- return fr_dir(fp) == DMA_FROM_DEVICE;
- return false;
-}
-
-static inline bool fc_frame_is_write(const struct fc_frame *fp)
-{
- if (fc_frame_is_cmd(fp) && fr_cmd(fp))
- return fr_dir(fp) == DMA_TO_DEVICE;
- return false;
-}
-
/*
* Check for leaks.
* Print the frame header of any currently allocated frame, assuming there
diff --git a/include/scsi/fc_transport_fcoe.h b/include/scsi/fc_transport_fcoe.h
deleted file mode 100644
index 2816462..0000000
--- a/include/scsi/fc_transport_fcoe.h
+++ /dev/null
@@ -1,53 +0,0 @@
-#ifndef FC_TRANSPORT_FCOE_H
-#define FC_TRANSPORT_FCOE_H
-
-#include <linux/device.h>
-#include <linux/netdevice.h>
-#include <scsi/scsi_host.h>
-#include <scsi/libfc.h>
-
-/**
- * struct fcoe_transport - FCoE transport struct for generic transport
- * for Ethernet devices as well as pure HBAs
- *
- * @name: name for thsi transport
- * @bus: physical bus type (pci_bus_type)
- * @driver: physical bus driver for network device
- * @create: entry create function
- * @destroy: exit destroy function
- * @list: list of transports
- */
-struct fcoe_transport {
- char *name;
- unsigned short vendor;
- unsigned short device;
- struct bus_type *bus;
- struct device_driver *driver;
- int (*create)(struct net_device *device);
- int (*destroy)(struct net_device *device);
- bool (*match)(struct net_device *device);
- struct list_head list;
- struct list_head devlist;
- struct mutex devlock;
-};
-
-/**
- * MODULE_ALIAS_FCOE_PCI
- *
- * some care must be taken with this, vendor and device MUST be a hex value
- * preceded with 0x and with letters in lower case (0x12ab, not 0x12AB or 12AB)
- */
-#define MODULE_ALIAS_FCOE_PCI(vendor, device) \
- MODULE_ALIAS("fcoe-pci-" __stringify(vendor) "-" __stringify(device))
-
-/* exported funcs */
-int fcoe_transport_attach(struct net_device *netdev);
-int fcoe_transport_release(struct net_device *netdev);
-int fcoe_transport_register(struct fcoe_transport *t);
-int fcoe_transport_unregister(struct fcoe_transport *t);
-int __init fcoe_transport_init(void);
-int __exit fcoe_transport_exit(void);
-
-/* fcow_sw is the default transport */
-extern struct fcoe_transport fcoe_sw_transport;
-#endif /* FC_TRANSPORT_FCOE_H */
diff --git a/include/scsi/libfc.h b/include/scsi/libfc.h
index 13b9592..2493661 100644
--- a/include/scsi/libfc.h
+++ b/include/scsi/libfc.h
@@ -22,6 +22,7 @@
#include <linux/timer.h>
#include <linux/if.h>
+#include <linux/percpu.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
@@ -35,17 +36,74 @@
#include <scsi/fc_frame.h>
-#define LIBFC_DEBUG
-
-#ifdef LIBFC_DEBUG
-/* Log messages */
-#define FC_DBG(fmt, args...) \
- do { \
- printk(KERN_INFO "%s " fmt, __func__, ##args); \
- } while (0)
-#else
-#define FC_DBG(fmt, args...)
-#endif
+#include <scsi/fc_compat.h>
+
+#define FC_LIBFC_LOGGING 0x01 /* General logging, not categorized */
+#define FC_LPORT_LOGGING 0x02 /* lport layer logging */
+#define FC_DISC_LOGGING 0x04 /* discovery layer logging */
+#define FC_RPORT_LOGGING 0x08 /* rport layer logging */
+#define FC_FCP_LOGGING 0x10 /* I/O path logging */
+#define FC_EM_LOGGING 0x20 /* Exchange Manager logging */
+#define FC_EXCH_LOGGING 0x40 /* Exchange/Sequence logging */
+#define FC_SCSI_LOGGING 0x80 /* SCSI logging (mostly error handling) */
+
+extern unsigned int fc_debug_logging;
+
+#define FC_CHECK_LOGGING(LEVEL, CMD) \
+do { \
+ if (unlikely(fc_debug_logging & LEVEL)) \
+ do { \
+ CMD; \
+ } while (0); \
+} while (0);
+
+#define FC_LIBFC_DBG(fmt, args...) \
+ FC_CHECK_LOGGING(FC_LIBFC_LOGGING, \
+ printk(KERN_INFO "libfc: " fmt, ##args);)
+
+#define FC_LPORT_DBG(lport, fmt, args...) \
+ FC_CHECK_LOGGING(FC_LPORT_LOGGING, \
+ printk(KERN_INFO "lport: %6x: " fmt, \
+ fc_host_port_id(lport->host), ##args);)
+
+#define FC_DISC_DBG(disc, fmt, args...) \
+ FC_CHECK_LOGGING(FC_DISC_LOGGING, \
+ printk(KERN_INFO "disc: %6x: " fmt, \
+ fc_host_port_id(disc->lport->host), \
+ ##args);)
+
+#define FC_RPORT_DBG(rport, fmt, args...) \
+do { \
+ struct fc_rport_libfc_priv *rdata = rport->dd_data; \
+ struct fc_lport *lport = rdata->local_port; \
+ FC_CHECK_LOGGING(FC_RPORT_LOGGING, \
+ printk(KERN_INFO "rport: %6x: %6x: " fmt, \
+ fc_host_port_id(lport->host), \
+ rport->port_id, ##args);) \
+} while (0);
+
+#define FC_FCP_DBG(pkt, fmt, args...) \
+ FC_CHECK_LOGGING(FC_FCP_LOGGING, \
+ printk(KERN_INFO "fcp: %6x: %6x: " fmt, \
+ fc_host_port_id(pkt->lp->host), \
+ pkt->rport->port_id, ##args);)
+
+#define FC_EM_DBG(em, fmt, args...) \
+ FC_CHECK_LOGGING(FC_EM_LOGGING, \
+ printk(KERN_INFO "em: %6x: " fmt, \
+ fc_host_port_id(em->lp->host), \
+ ##args);)
+
+#define FC_EXCH_DBG(exch, fmt, args...) \
+ FC_CHECK_LOGGING(FC_EXCH_LOGGING, \
+ printk(KERN_INFO "exch: %6x: %4x: " fmt, \
+ fc_host_port_id(exch->lp->host), \
+ exch->xid, ##args);)
+
+#define FC_SCSI_DBG(lport, fmt, args...) \
+ FC_CHECK_LOGGING(FC_SCSI_LOGGING, \
+ printk(KERN_INFO "scsi: %6x: " fmt, \
+ fc_host_port_id(lport->host), ##args);)
/*
* libfc error codes
@@ -70,9 +128,6 @@
/*
* FC HBA status
*/
-#define FC_PAUSE (1 << 1)
-#define FC_LINK_UP (1 << 0)
-
enum fc_lport_state {
LPORT_ST_NONE = 0,
LPORT_ST_FLOGI,
@@ -91,14 +146,6 @@ enum fc_disc_event {
DISC_EV_FAILED
};
-enum fc_lport_event {
- RPORT_EV_NONE = 0,
- RPORT_EV_CREATED,
- RPORT_EV_FAILED,
- RPORT_EV_STOP,
- RPORT_EV_LOGO
-};
-
enum fc_rport_state {
RPORT_ST_NONE = 0,
RPORT_ST_INIT, /* initialized */
@@ -128,6 +175,19 @@ struct fc_disc_port {
struct work_struct rport_work;
};
+enum fc_rport_event {
+ RPORT_EV_NONE = 0,
+ RPORT_EV_CREATED,
+ RPORT_EV_FAILED,
+ RPORT_EV_STOP,
+ RPORT_EV_LOGO
+};
+
+struct fc_rport_operations {
+ void (*event_callback)(struct fc_lport *, struct fc_rport *,
+ enum fc_rport_event);
+};
+
/**
* struct fc_rport_libfc_priv - libfc internal information about a remote port
* @local_port: Fibre Channel host port instance
@@ -142,24 +202,22 @@ struct fc_disc_port {
* @event_callback: Callback for rport READY, FAILED or LOGO
*/
struct fc_rport_libfc_priv {
- struct fc_lport *local_port;
- enum fc_rport_state rp_state;
- u16 flags;
+ struct fc_lport *local_port;
+ enum fc_rport_state rp_state;
+ u16 flags;
#define FC_RP_FLAGS_REC_SUPPORTED (1 << 0)
#define FC_RP_FLAGS_RETRY (1 << 1)
- u16 max_seq;
- unsigned int retries;
- unsigned int e_d_tov;
- unsigned int r_a_tov;
- enum fc_rport_trans_state trans_state;
- struct mutex rp_mutex;
- struct work_struct retry_work;
- enum fc_lport_event event;
- void (*event_callback)(struct fc_lport *,
- struct fc_rport *,
- enum fc_lport_event);
- struct list_head peers;
- struct work_struct event_work;
+ u16 max_seq;
+ unsigned int retries;
+ unsigned int e_d_tov;
+ unsigned int r_a_tov;
+ enum fc_rport_trans_state trans_state;
+ struct mutex rp_mutex;
+ struct delayed_work retry_work;
+ enum fc_rport_event event;
+ struct fc_rport_operations *ops;
+ struct list_head peers;
+ struct work_struct event_work;
};
#define PRIV_TO_RPORT(x) \
@@ -168,7 +226,6 @@ struct fc_rport_libfc_priv {
(struct fc_rport_libfc_priv *)((void *)x + sizeof(struct fc_rport));
struct fc_rport *fc_rport_rogue_create(struct fc_disc_port *);
-void fc_rport_rogue_destroy(struct fc_rport *);
static inline void fc_rport_set_name(struct fc_rport *rport, u64 wwpn, u64 wwnn)
{
@@ -248,6 +305,7 @@ struct fc_fcp_pkt {
*/
struct fcp_cmnd cdb_cmd;
size_t xfer_len;
+ u16 xfer_ddp; /* this xfer is ddped */
u32 xfer_contig_end; /* offset of end of contiguous xfer */
u16 max_payload; /* max payload size in bytes */
@@ -270,6 +328,15 @@ struct fc_fcp_pkt {
u8 recov_retry; /* count of recovery retries */
struct fc_seq *recov_seq; /* sequence for REC or SRR */
};
+/*
+ * FC_FCP HELPER FUNCTIONS
+ *****************************/
+static inline bool fc_fcp_is_read(const struct fc_fcp_pkt *fsp)
+{
+ if (fsp && fsp->cmd)
+ return fsp->cmd->sc_data_direction == DMA_FROM_DEVICE;
+ return false;
+}
/*
* Structure and function definitions for managing Fibre Channel Exchanges
@@ -298,11 +365,10 @@ struct fc_seq {
/*
* Exchange.
*
- * Locking notes: The ex_lock protects changes to the following fields:
- * esb_stat, f_ctl, seq.ssb_stat, seq.f_ctl.
+ * Locking notes: The ex_lock protects following items:
+ * state, esb_stat, f_ctl, seq.ssb_stat
* seq_id
* sequence allocation
- *
*/
struct fc_exch {
struct fc_exch_mgr *em; /* exchange manager */
@@ -311,7 +377,7 @@ struct fc_exch {
struct list_head ex_list; /* free or busy list linkage */
spinlock_t ex_lock; /* lock covering exchange state */
atomic_t ex_refcnt; /* reference counter */
- struct work_struct timeout_work; /* timer for upper level protocols */
+ struct delayed_work timeout_work; /* timer for upper level protocols */
struct fc_lport *lp; /* fc device instance */
u16 oxid; /* originator's exchange ID */
u16 rxid; /* responder's exchange ID */
@@ -340,31 +406,17 @@ struct fc_exch {
struct libfc_function_template {
- /**
- * Mandatory Fields
- *
- * These handlers must be implemented by the LLD.
- */
-
/*
* Interface to send a FC frame
- */
- int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
-
- /**
- * Optional Fields
*
- * The LLD may choose to implement any of the following handlers.
- * If LLD doesn't specify hander and leaves its pointer NULL then
- * the default libfc function will be used for that handler.
- */
-
- /**
- * ELS/CT interfaces
+ * STATUS: REQUIRED
*/
+ int (*frame_send)(struct fc_lport *lp, struct fc_frame *fp);
/*
- * elsct_send - sends ELS/CT frame
+ * Interface to send ELS/CT frames
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*elsct_send)(struct fc_lport *lport,
struct fc_rport *rport,
@@ -374,9 +426,6 @@ struct libfc_function_template {
struct fc_frame *fp,
void *arg),
void *arg, u32 timer_msec);
- /**
- * Exhance Manager interfaces
- */
/*
* Send the FC frame payload using a new exchange and sequence.
@@ -408,6 +457,8 @@ struct libfc_function_template {
* timer_msec argument is specified. The timer is canceled when
* it fires or when the exchange is done. The exchange timeout handler
* is registered by EM layer.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*exch_seq_send)(struct fc_lport *lp,
struct fc_frame *fp,
@@ -419,14 +470,33 @@ struct libfc_function_template {
void *arg, unsigned int timer_msec);
/*
- * send a frame using existing sequence and exchange.
+ * Sets up the DDP context for a given exchange id on the given
+ * scatterlist if LLD supports DDP for large receive.
+ *
+ * STATUS: OPTIONAL
+ */
+ int (*ddp_setup)(struct fc_lport *lp, u16 xid,
+ struct scatterlist *sgl, unsigned int sgc);
+ /*
+ * Completes the DDP transfer and returns the length of data DDPed
+ * for the given exchange id.
+ *
+ * STATUS: OPTIONAL
+ */
+ int (*ddp_done)(struct fc_lport *lp, u16 xid);
+ /*
+ * Send a frame using an existing sequence and exchange.
+ *
+ * STATUS: OPTIONAL
*/
int (*seq_send)(struct fc_lport *lp, struct fc_seq *sp,
struct fc_frame *fp);
/*
- * Send ELS response using mainly infomation
- * in exchange and sequence in EM layer.
+ * Send an ELS response using infomation from a previous
+ * exchange and sequence.
+ *
+ * STATUS: OPTIONAL
*/
void (*seq_els_rsp_send)(struct fc_seq *sp, enum fc_els_cmd els_cmd,
struct fc_seq_els_data *els_data);
@@ -438,6 +508,8 @@ struct libfc_function_template {
* A timer_msec can be specified for abort timeout, if non-zero
* timer_msec value is specified then exchange resp handler
* will be called with timeout error if no response to abort.
+ *
+ * STATUS: OPTIONAL
*/
int (*seq_exch_abort)(const struct fc_seq *req_sp,
unsigned int timer_msec);
@@ -445,6 +517,8 @@ struct libfc_function_template {
/*
* Indicate that an exchange/sequence tuple is complete and the memory
* allocated for the related objects may be freed.
+ *
+ * STATUS: OPTIONAL
*/
void (*exch_done)(struct fc_seq *sp);
@@ -452,6 +526,8 @@ struct libfc_function_template {
* Assigns a EM and a free XID for an new exchange and then
* allocates a new exchange and sequence pair.
* The fp can be used to determine free XID.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_exch *(*exch_get)(struct fc_lport *lp, struct fc_frame *fp);
@@ -459,12 +535,16 @@ struct libfc_function_template {
* Release previously assigned XID by exch_get API.
* The LLD may implement this if XID is assigned by LLD
* in exch_get().
+ *
+ * STATUS: OPTIONAL
*/
void (*exch_put)(struct fc_lport *lp, struct fc_exch_mgr *mp,
u16 ex_id);
/*
* Start a new sequence on the same exchange/sequence tuple.
+ *
+ * STATUS: OPTIONAL
*/
struct fc_seq *(*seq_start_next)(struct fc_seq *sp);
@@ -472,26 +552,38 @@ struct libfc_function_template {
* Reset an exchange manager, completing all sequences and exchanges.
* If s_id is non-zero, reset only exchanges originating from that FID.
* If d_id is non-zero, reset only exchanges sending to that FID.
+ *
+ * STATUS: OPTIONAL
*/
- void (*exch_mgr_reset)(struct fc_exch_mgr *,
+ void (*exch_mgr_reset)(struct fc_lport *,
u32 s_id, u32 d_id);
- void (*rport_flush_queue)(void);
- /**
- * Local Port interfaces
+ /*
+ * Flush the rport work queue. Generally used before shutdown.
+ *
+ * STATUS: OPTIONAL
*/
+ void (*rport_flush_queue)(void);
/*
- * Receive a frame to a local port.
+ * Receive a frame for a local port.
+ *
+ * STATUS: OPTIONAL
*/
void (*lport_recv)(struct fc_lport *lp, struct fc_seq *sp,
struct fc_frame *fp);
+ /*
+ * Reset the local port.
+ *
+ * STATUS: OPTIONAL
+ */
int (*lport_reset)(struct fc_lport *);
- /**
- * Remote Port interfaces
+ /*
+ * Create a remote port
*/
+ struct fc_rport *(*rport_create)(struct fc_disc_port *);
/*
* Initiates the RP state machine. It is called from the LP module.
@@ -501,26 +593,33 @@ struct libfc_function_template {
* - PLOGI
* - PRLI
* - RTV
+ *
+ * STATUS: OPTIONAL
*/
int (*rport_login)(struct fc_rport *rport);
/*
* Logoff, and remove the rport from the transport if
* it had been added. This will send a LOGO to the target.
+ *
+ * STATUS: OPTIONAL
*/
int (*rport_logoff)(struct fc_rport *rport);
/*
* Recieve a request from a remote port.
+ *
+ * STATUS: OPTIONAL
*/
void (*rport_recv_req)(struct fc_seq *, struct fc_frame *,
struct fc_rport *);
- struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
-
- /**
- * FCP interfaces
+ /*
+ * lookup an rport by it's port ID.
+ *
+ * STATUS: OPTIONAL
*/
+ struct fc_rport *(*rport_lookup)(const struct fc_lport *, u32);
/*
* Send a fcp cmd from fsp pkt.
@@ -528,30 +627,38 @@ struct libfc_function_template {
*
* The resp handler is called when FCP_RSP received.
*
+ * STATUS: OPTIONAL
*/
int (*fcp_cmd_send)(struct fc_lport *lp, struct fc_fcp_pkt *fsp,
void (*resp)(struct fc_seq *, struct fc_frame *fp,
void *arg));
/*
- * Used at least durring linkdown and reset
+ * Cleanup the FCP layer, used durring link down and reset
+ *
+ * STATUS: OPTIONAL
*/
void (*fcp_cleanup)(struct fc_lport *lp);
/*
* Abort all I/O on a local port
+ *
+ * STATUS: OPTIONAL
*/
void (*fcp_abort_io)(struct fc_lport *lp);
- /**
- * Discovery interfaces
+ /*
+ * Receive a request for the discovery layer.
+ *
+ * STATUS: OPTIONAL
*/
-
void (*disc_recv_req)(struct fc_seq *,
struct fc_frame *, struct fc_lport *);
/*
* Start discovery for a local port.
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_start)(void (*disc_callback)(struct fc_lport *,
enum fc_disc_event),
@@ -560,6 +667,8 @@ struct libfc_function_template {
/*
* Stop discovery for a given lport. This will remove
* all discovered rports
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_stop) (struct fc_lport *);
@@ -567,11 +676,32 @@ struct libfc_function_template {
* Stop discovery for a given lport. This will block
* until all discovered rports are deleted from the
* FC transport class
+ *
+ * STATUS: OPTIONAL
*/
void (*disc_stop_final) (struct fc_lport *);
};
-struct fc_disc;
+/* information used by the discovery layer */
+struct fc_disc {
+ unsigned char retry_count;
+ unsigned char delay;
+ unsigned char pending;
+ unsigned char requested;
+ unsigned short seq_count;
+ unsigned char buf_len;
+ enum fc_disc_event event;
+
+ void (*disc_callback)(struct fc_lport *,
+ enum fc_disc_event);
+
+ struct list_head rports;
+ struct list_head rogue_rports;
+ struct fc_lport *lport;
+ struct mutex disc_mutex;
+ struct fc_gpn_ft_resp partial_buf; /* partial name buffer */
+ struct delayed_work disc_work;
+};
struct fc_lport {
struct list_head list;
@@ -581,17 +711,19 @@ struct fc_lport {
struct fc_exch_mgr *emp;
struct fc_rport *dns_rp;
struct fc_rport *ptp_rp;
- struct fc_disc *disc;
void *scsi_priv;
+ struct fc_disc disc;
/* Operational Information */
struct libfc_function_template tt;
- u16 link_status;
+ u8 link_up;
+ u8 qfull;
enum fc_lport_state state;
unsigned long boot_time;
struct fc_host_statistics host_stats;
- struct fcoe_dev_stats *dev_stats[NR_CPUS];
+ struct fcoe_dev_stats *dev_stats;
+
u64 wwpn;
u64 wwnn;
u8 retry_count;
@@ -606,9 +738,11 @@ struct fc_lport {
unsigned int e_d_tov;
unsigned int r_a_tov;
u8 max_retry_count;
+ u8 max_rport_retry_count;
u16 link_speed;
u16 link_supported_speeds;
u16 lro_xid; /* max xid for fcoe lro */
+ unsigned int lso_max; /* max large send size */
struct fc_ns_fts fcts; /* FC-4 type masks */
struct fc_els_rnid_gen rnid_gen; /* RNID information */
@@ -616,18 +750,13 @@ struct fc_lport {
struct mutex lp_mutex;
/* Miscellaneous */
- struct work_struct retry_work;
- struct work_struct disc_work;
+ struct delayed_work retry_work;
+ struct delayed_work disc_work;
};
-/**
+/*
* FC_LPORT HELPER FUNCTIONS
*****************************/
-static inline void *lport_priv(const struct fc_lport *lp)
-{
- return (void *)(lp + 1);
-}
-
static inline int fc_lport_test_ready(struct fc_lport *lp)
{
return lp->state == LPORT_ST_READY;
@@ -651,8 +780,44 @@ static inline void fc_lport_state_enter(struct fc_lport *lp,
lp->state = state;
}
+static inline int fc_lport_init_stats(struct fc_lport *lp)
+{
+ /* allocate per cpu stats block */
+ lp->dev_stats = alloc_percpu(struct fcoe_dev_stats);
+ if (!lp->dev_stats)
+ return -ENOMEM;
+ return 0;
+}
+
+static inline void fc_lport_free_stats(struct fc_lport *lp)
+{
+ free_percpu(lp->dev_stats);
+}
+
+static inline struct fcoe_dev_stats *fc_lport_get_stats(struct fc_lport *lp)
+{
+ return per_cpu_ptr(lp->dev_stats, smp_processor_id());
+}
+
+static inline void *lport_priv(const struct fc_lport *lp)
+{
+ return (void *)(lp + 1);
+}
/**
+ * libfc_host_alloc() - Allocate a Scsi_Host with room for the fc_lport
+ * @sht: ptr to the scsi host templ
+ * @priv_size: size of private data after fc_lport
+ *
+ * Returns: ptr to Scsi_Host
+ */
+static inline struct Scsi_Host *
+libfc_host_alloc(struct scsi_host_template *sht, int priv_size)
+{
+ return scsi_host_alloc(sht, sizeof(struct fc_lport) + priv_size);
+}
+
+/*
* LOCAL PORT LAYER
*****************************/
int fc_lport_init(struct fc_lport *lp);
@@ -687,12 +852,6 @@ void fc_linkup(struct fc_lport *);
void fc_linkdown(struct fc_lport *);
/*
- * Pause and unpause traffic.
- */
-void fc_pause(struct fc_lport *);
-void fc_unpause(struct fc_lport *);
-
-/*
* Configure the local port.
*/
int fc_lport_config(struct fc_lport *);
@@ -708,19 +867,19 @@ int fc_lport_reset(struct fc_lport *);
int fc_set_mfs(struct fc_lport *lp, u32 mfs);
-/**
+/*
* REMOTE PORT LAYER
*****************************/
int fc_rport_init(struct fc_lport *lp);
void fc_rport_terminate_io(struct fc_rport *rp);
-/**
+/*
* DISCOVERY LAYER
*****************************/
int fc_disc_init(struct fc_lport *lp);
-/**
+/*
* SCSI LAYER
*****************************/
/*
@@ -781,7 +940,12 @@ int fc_change_queue_type(struct scsi_device *sdev, int tag_type);
*/
void fc_fcp_destroy(struct fc_lport *);
-/**
+/*
+ * Set up direct-data placement for this I/O request
+ */
+void fc_fcp_ddp_setup(struct fc_fcp_pkt *fsp, u16 xid);
+
+/*
* ELS/CT interface
*****************************/
/*
@@ -790,7 +954,7 @@ void fc_fcp_destroy(struct fc_lport *);
int fc_elsct_init(struct fc_lport *lp);
-/**
+/*
* EXCHANGE MANAGER LAYER
*****************************/
/*
@@ -899,7 +1063,7 @@ struct fc_seq *fc_seq_start_next(struct fc_seq *sp);
* If s_id is non-zero, reset only exchanges originating from that FID.
* If d_id is non-zero, reset only exchanges sending to that FID.
*/
-void fc_exch_mgr_reset(struct fc_exch_mgr *, u32 s_id, u32 d_id);
+void fc_exch_mgr_reset(struct fc_lport *, u32 s_id, u32 d_id);
/*
* Functions for fc_functions_template
diff --git a/include/scsi/libfcoe.h b/include/scsi/libfcoe.h
index 4ca5902..666cc13 100644
--- a/include/scsi/libfcoe.h
+++ b/include/scsi/libfcoe.h
@@ -1,5 +1,6 @@
/*
- * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
+ * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
+ * Copyright (c) 2007-2008 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
@@ -20,158 +21,144 @@
#ifndef _LIBFCOE_H
#define _LIBFCOE_H
+#include <linux/etherdevice.h>
+#include <linux/if_ether.h>
#include <linux/netdevice.h>
#include <linux/skbuff.h>
+#include <linux/workqueue.h>
#include <scsi/fc/fc_fcoe.h>
#include <scsi/libfc.h>
/*
- * this percpu struct for fcoe
+ * FIP tunable parameters.
*/
-struct fcoe_percpu_s {
- int cpu;
- struct task_struct *thread;
- struct sk_buff_head fcoe_rx_list;
- struct page *crc_eof_page;
- int crc_eof_offset;
+#define FCOE_CTLR_START_DELAY 2000 /* mS after first adv. to choose FCF */
+#define FCOE_CTRL_SOL_TOV 2000 /* min. solicitation interval (mS) */
+#define FCOE_CTLR_FCF_LIMIT 20 /* max. number of FCF entries */
+
+/**
+ * enum fip_state - internal state of FCoE controller.
+ * @FIP_ST_DISABLED: controller has been disabled or not yet enabled.
+ * @FIP_ST_LINK_WAIT: the physical link is down or unusable.
+ * @FIP_ST_AUTO: determining whether to use FIP or non-FIP mode.
+ * @FIP_ST_NON_FIP: non-FIP mode selected.
+ * @FIP_ST_ENABLED: FIP mode selected.
+ */
+enum fip_state {
+ FIP_ST_DISABLED,
+ FIP_ST_LINK_WAIT,
+ FIP_ST_AUTO,
+ FIP_ST_NON_FIP,
+ FIP_ST_ENABLED,
};
-/*
- * the fcoe sw transport private data
+/**
+ * struct fcoe_ctlr - FCoE Controller and FIP state.
+ * @state: internal FIP state for network link and FIP or non-FIP mode.
+ * @lp: &fc_lport: libfc local port.
+ * @sel_fcf: currently selected FCF, or NULL.
+ * @fcfs: list of discovered FCFs.
+ * @fcf_count: number of discovered FCF entries.
+ * @sol_time: time when a multicast solicitation was last sent.
+ * @sel_time: time after which to select an FCF.
+ * @port_ka_time: time of next port keep-alive.
+ * @ctlr_ka_time: time of next controller keep-alive.
+ * @timer: timer struct used for all delayed events.
+ * @link_work: &work_struct for doing FCF selection.
+ * @recv_work: &work_struct for receiving FIP frames.
+ * @fip_recv_list: list of received FIP frames.
+ * @user_mfs: configured maximum FC frame size, including FC header.
+ * @flogi_oxid: exchange ID of most recent fabric login.
+ * @flogi_count: number of FLOGI attempts in AUTO mode.
+ * @link: current link status for libfc.
+ * @last_link: last link state reported to libfc.
+ * @map_dest: use the FC_MAP mode for destination MAC addresses.
+ * @dest_addr: MAC address of the selected FC forwarder.
+ * @ctl_src_addr: the native MAC address of our local port.
+ * @data_src_addr: the assigned MAC address for the local port after FLOGI.
+ * @send: LLD-supplied function to handle sending of FIP Ethernet frames.
+ * @update_mac: LLD-supplied function to handle changes to MAC addresses.
+ * @lock: lock protecting this structure.
+ *
+ * This structure is used by all FCoE drivers. It contains information
+ * needed by all FCoE low-level drivers (LLDs) as well as internal state
+ * for FIP, and fields shared with the LLDS.
*/
-struct fcoe_softc {
- struct list_head list;
+struct fcoe_ctlr {
+ enum fip_state state;
struct fc_lport *lp;
- struct net_device *real_dev;
- struct net_device *phys_dev; /* device with ethtool_ops */
- struct packet_type fcoe_packet_type;
- struct sk_buff_head fcoe_pending_queue;
- u16 user_mfs; /* configured max frame size */
-
+ struct fcoe_fcf *sel_fcf;
+ struct list_head fcfs;
+ u16 fcf_count;
+ unsigned long sol_time;
+ unsigned long sel_time;
+ unsigned long port_ka_time;
+ unsigned long ctlr_ka_time;
+ struct timer_list timer;
+ struct work_struct link_work;
+ struct work_struct recv_work;
+ struct sk_buff_head fip_recv_list;
+ u16 user_mfs;
+ u16 flogi_oxid;
+ u8 flogi_count;
+ u8 link;
+ u8 last_link;
+ u8 map_dest;
u8 dest_addr[ETH_ALEN];
u8 ctl_src_addr[ETH_ALEN];
u8 data_src_addr[ETH_ALEN];
- /*
- * fcoe protocol address learning related stuff
- */
- u16 flogi_oxid;
- u8 flogi_progress;
- u8 address_mode;
-};
-
-static inline struct fcoe_softc *fcoe_softc(
- const struct fc_lport *lp)
-{
- return (struct fcoe_softc *)lport_priv(lp);
-}
-
-static inline struct net_device *fcoe_netdev(
- const struct fc_lport *lp)
-{
- return fcoe_softc(lp)->real_dev;
-}
-
-static inline struct fcoe_hdr *skb_fcoe_header(const struct sk_buff *skb)
-{
- return (struct fcoe_hdr *)skb_network_header(skb);
-}
-
-static inline int skb_fcoe_offset(const struct sk_buff *skb)
-{
- return skb_network_offset(skb);
-}
-
-static inline struct fc_frame_header *skb_fc_header(const struct sk_buff *skb)
-{
- return (struct fc_frame_header *)skb_transport_header(skb);
-}
-
-static inline int skb_fc_offset(const struct sk_buff *skb)
-{
- return skb_transport_offset(skb);
-}
-
-static inline void skb_reset_fc_header(struct sk_buff *skb)
-{
- skb_reset_network_header(skb);
- skb_set_transport_header(skb, skb_network_offset(skb) +
- sizeof(struct fcoe_hdr));
-}
-static inline bool skb_fc_is_data(const struct sk_buff *skb)
-{
- return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_SOL_DATA;
-}
-
-static inline bool skb_fc_is_cmd(const struct sk_buff *skb)
-{
- return skb_fc_header(skb)->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD;
-}
-
-static inline bool skb_fc_has_exthdr(const struct sk_buff *skb)
-{
- return (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_VFTH) ||
- (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_IFRH) ||
- (skb_fc_header(skb)->fh_r_ctl == FC_RCTL_ENCH);
-}
-
-static inline bool skb_fc_is_roff(const struct sk_buff *skb)
-{
- return skb_fc_header(skb)->fh_f_ctl[2] & FC_FC_REL_OFF;
-}
+ void (*send)(struct fcoe_ctlr *, struct sk_buff *);
+ void (*update_mac)(struct fcoe_ctlr *, u8 *old, u8 *new);
+ spinlock_t lock;
+};
-static inline u16 skb_fc_oxid(const struct sk_buff *skb)
-{
- return be16_to_cpu(skb_fc_header(skb)->fh_ox_id);
-}
+/*
+ * struct fcoe_fcf - Fibre-Channel Forwarder.
+ * @list: list linkage.
+ * @time: system time (jiffies) when an advertisement was last received.
+ * @switch_name: WWN of switch from advertisement.
+ * @fabric_name: WWN of fabric from advertisement.
+ * @fc_map: FC_MAP value from advertisement.
+ * @fcf_mac: Ethernet address of the FCF.
+ * @vfid: virtual fabric ID.
+ * @pri: seletion priority, smaller values are better.
+ * @flags: flags received from advertisement.
+ * @fka_period: keep-alive period, in jiffies.
+ *
+ * A Fibre-Channel Forwarder (FCF) is the entity on the Ethernet that
+ * passes FCoE frames on to an FC fabric. This structure represents
+ * one FCF from which advertisements have been received.
+ *
+ * When looking up an FCF, @switch_name, @fabric_name, @fc_map, @vfid, and
+ * @fcf_mac together form the lookup key.
+ */
+struct fcoe_fcf {
+ struct list_head list;
+ unsigned long time;
-static inline u16 skb_fc_rxid(const struct sk_buff *skb)
-{
- return be16_to_cpu(skb_fc_header(skb)->fh_rx_id);
-}
+ u64 switch_name;
+ u64 fabric_name;
+ u32 fc_map;
+ u16 vfid;
+ u8 fcf_mac[ETH_ALEN];
-/* FIXME - DMA_BIDIRECTIONAL ? */
-#define skb_cb(skb) ((struct fcoe_rcv_info *)&((skb)->cb[0]))
-#define skb_cmd(skb) (skb_cb(skb)->fr_cmd)
-#define skb_dir(skb) (skb_cmd(skb)->sc_data_direction)
-static inline bool skb_fc_is_read(const struct sk_buff *skb)
-{
- if (skb_fc_is_cmd(skb) && skb_cmd(skb))
- return skb_dir(skb) == DMA_FROM_DEVICE;
- return false;
-}
+ u8 pri;
+ u16 flags;
+ u32 fka_period;
+};
-static inline bool skb_fc_is_write(const struct sk_buff *skb)
-{
- if (skb_fc_is_cmd(skb) && skb_cmd(skb))
- return skb_dir(skb) == DMA_TO_DEVICE;
- return false;
-}
+/* FIP API functions */
+void fcoe_ctlr_init(struct fcoe_ctlr *);
+void fcoe_ctlr_destroy(struct fcoe_ctlr *);
+void fcoe_ctlr_link_up(struct fcoe_ctlr *);
+int fcoe_ctlr_link_down(struct fcoe_ctlr *);
+int fcoe_ctlr_els_send(struct fcoe_ctlr *, struct sk_buff *);
+void fcoe_ctlr_recv(struct fcoe_ctlr *, struct sk_buff *);
+int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *, struct fc_frame *fp, u8 *sa);
/* libfcoe funcs */
-int fcoe_reset(struct Scsi_Host *shost);
-u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
- unsigned int scheme, unsigned int port);
-
-u32 fcoe_fc_crc(struct fc_frame *fp);
-int fcoe_xmit(struct fc_lport *, struct fc_frame *);
-int fcoe_rcv(struct sk_buff *, struct net_device *,
- struct packet_type *, struct net_device *);
-
-int fcoe_percpu_receive_thread(void *arg);
-void fcoe_clean_pending_queue(struct fc_lport *lp);
-void fcoe_percpu_clean(struct fc_lport *lp);
-void fcoe_watchdog(ulong vp);
-int fcoe_link_ok(struct fc_lport *lp);
-
-struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
-int fcoe_hostlist_add(const struct fc_lport *);
-int fcoe_hostlist_remove(const struct fc_lport *);
-
-struct Scsi_Host *fcoe_host_alloc(struct scsi_host_template *, int);
+u64 fcoe_wwn_from_mac(unsigned char mac[], unsigned int, unsigned int);
int fcoe_libfc_config(struct fc_lport *, struct libfc_function_template *);
-/* fcoe sw hba */
-int __init fcoe_sw_init(void);
-int __exit fcoe_sw_exit(void);
#endif /* _LIBFCOE_H */
distrib
>
Scientific%20Linux
>
5x
>
x86_64
>
by-pkgid
>
fc11cd6e1c513a17304da94a5390f3cd
>
files
>
3672
