2 * Copyright(c) 2007 - 2009 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
20 #include <linux/module.h>
21 #include <linux/version.h>
22 #include <linux/spinlock.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/ethtool.h>
26 #include <linux/if_ether.h>
27 #include <linux/if_vlan.h>
28 #include <linux/crc32.h>
29 #include <linux/cpu.h>
31 #include <linux/sysfs.h>
32 #include <linux/ctype.h>
33 #include <scsi/scsi_tcq.h>
34 #include <scsi/scsicam.h>
35 #include <scsi/scsi_transport.h>
36 #include <scsi/scsi_transport_fc.h>
37 #include <net/rtnetlink.h>
39 #include <scsi/fc/fc_encaps.h>
40 #include <scsi/fc/fc_fip.h>
42 #include <scsi/libfc.h>
43 #include <scsi/fc_frame.h>
44 #include <scsi/libfcoe.h>
48 MODULE_AUTHOR("Open-FCoE.org");
49 MODULE_DESCRIPTION("FCoE");
50 MODULE_LICENSE("GPL v2");
52 /* Performance tuning parameters for fcoe */
53 static unsigned int fcoe_ddp_min;
54 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
55 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
56 "Direct Data Placement (DDP).");
58 DEFINE_MUTEX(fcoe_config_mutex);
60 /* fcoe_percpu_clean completion. Waiter protected by fcoe_create_mutex */
61 static DECLARE_COMPLETION(fcoe_flush_completion);
64 /* must only by accessed under the RTNL mutex */
65 LIST_HEAD(fcoe_hostlist);
66 DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
68 /* Function Prototypes */
69 static int fcoe_reset(struct Scsi_Host *);
70 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
71 static int fcoe_rcv(struct sk_buff *, struct net_device *,
72 struct packet_type *, struct net_device *);
73 static int fcoe_percpu_receive_thread(void *);
74 static void fcoe_clean_pending_queue(struct fc_lport *);
75 static void fcoe_percpu_clean(struct fc_lport *);
76 static int fcoe_link_ok(struct fc_lport *);
78 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
79 static int fcoe_hostlist_add(const struct fc_lport *);
81 static void fcoe_check_wait_queue(struct fc_lport *, struct sk_buff *);
82 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
83 static void fcoe_dev_setup(void);
84 static void fcoe_dev_cleanup(void);
85 static struct fcoe_interface
86 *fcoe_hostlist_lookup_port(const struct net_device *);
88 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
89 struct packet_type *, struct net_device *);
91 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
92 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
93 static u8 *fcoe_get_src_mac(struct fc_lport *);
94 static void fcoe_destroy_work(struct work_struct *);
96 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
98 static int fcoe_ddp_done(struct fc_lport *, u16);
100 static int fcoe_cpu_callback(struct notifier_block *, unsigned long, void *);
102 static int fcoe_create(const char *, struct kernel_param *);
103 static int fcoe_destroy(const char *, struct kernel_param *);
105 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
106 u32 did, struct fc_frame *,
108 void (*resp)(struct fc_seq *,
111 void *, u32 timeout);
113 module_param_call(create, fcoe_create, NULL, NULL, S_IWUSR);
114 __MODULE_PARM_TYPE(create, "string");
115 MODULE_PARM_DESC(create, "Create fcoe fcoe using net device passed in.");
116 module_param_call(destroy, fcoe_destroy, NULL, NULL, S_IWUSR);
117 __MODULE_PARM_TYPE(destroy, "string");
118 MODULE_PARM_DESC(destroy, "Destroy fcoe fcoe");
120 /* notification function for packets from net device */
121 static struct notifier_block fcoe_notifier = {
122 .notifier_call = fcoe_device_notification,
125 /* notification function for CPU hotplug events */
126 static struct notifier_block fcoe_cpu_notifier = {
127 .notifier_call = fcoe_cpu_callback,
130 static struct scsi_transport_template *fcoe_transport_template;
131 static struct scsi_transport_template *fcoe_vport_transport_template;
133 static int fcoe_vport_destroy(struct fc_vport *);
134 static int fcoe_vport_create(struct fc_vport *, bool disabled);
135 static int fcoe_vport_disable(struct fc_vport *, bool disable);
136 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
138 static struct libfc_function_template fcoe_libfc_fcn_templ = {
139 .frame_send = fcoe_xmit,
140 .ddp_setup = fcoe_ddp_setup,
141 .ddp_done = fcoe_ddp_done,
142 .elsct_send = fcoe_elsct_send,
145 struct fc_function_template fcoe_transport_function = {
146 .show_host_node_name = 1,
147 .show_host_port_name = 1,
148 .show_host_supported_classes = 1,
149 .show_host_supported_fc4s = 1,
150 .show_host_active_fc4s = 1,
151 .show_host_maxframe_size = 1,
153 .show_host_port_id = 1,
154 .show_host_supported_speeds = 1,
155 .get_host_speed = fc_get_host_speed,
156 .show_host_speed = 1,
157 .show_host_port_type = 1,
158 .get_host_port_state = fc_get_host_port_state,
159 .show_host_port_state = 1,
160 .show_host_symbolic_name = 1,
162 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
163 .show_rport_maxframe_size = 1,
164 .show_rport_supported_classes = 1,
166 .show_host_fabric_name = 1,
167 .show_starget_node_name = 1,
168 .show_starget_port_name = 1,
169 .show_starget_port_id = 1,
170 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
171 .show_rport_dev_loss_tmo = 1,
172 .get_fc_host_stats = fc_get_host_stats,
173 .issue_fc_host_lip = fcoe_reset,
175 .terminate_rport_io = fc_rport_terminate_io,
177 .vport_create = fcoe_vport_create,
178 .vport_delete = fcoe_vport_destroy,
179 .vport_disable = fcoe_vport_disable,
180 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
182 .bsg_request = fc_lport_bsg_request,
185 struct fc_function_template fcoe_vport_transport_function = {
186 .show_host_node_name = 1,
187 .show_host_port_name = 1,
188 .show_host_supported_classes = 1,
189 .show_host_supported_fc4s = 1,
190 .show_host_active_fc4s = 1,
191 .show_host_maxframe_size = 1,
193 .show_host_port_id = 1,
194 .show_host_supported_speeds = 1,
195 .get_host_speed = fc_get_host_speed,
196 .show_host_speed = 1,
197 .show_host_port_type = 1,
198 .get_host_port_state = fc_get_host_port_state,
199 .show_host_port_state = 1,
200 .show_host_symbolic_name = 1,
202 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
203 .show_rport_maxframe_size = 1,
204 .show_rport_supported_classes = 1,
206 .show_host_fabric_name = 1,
207 .show_starget_node_name = 1,
208 .show_starget_port_name = 1,
209 .show_starget_port_id = 1,
210 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
211 .show_rport_dev_loss_tmo = 1,
212 .get_fc_host_stats = fc_get_host_stats,
213 .issue_fc_host_lip = fcoe_reset,
215 .terminate_rport_io = fc_rport_terminate_io,
217 .bsg_request = fc_lport_bsg_request,
220 static struct scsi_host_template fcoe_shost_template = {
221 .module = THIS_MODULE,
222 .name = "FCoE Driver",
223 .proc_name = FCOE_NAME,
224 .queuecommand = fc_queuecommand,
225 .eh_abort_handler = fc_eh_abort,
226 .eh_device_reset_handler = fc_eh_device_reset,
227 .eh_host_reset_handler = fc_eh_host_reset,
228 .slave_alloc = fc_slave_alloc,
229 .change_queue_depth = fc_change_queue_depth,
230 .change_queue_type = fc_change_queue_type,
233 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
234 .use_clustering = ENABLE_CLUSTERING,
235 .sg_tablesize = SG_ALL,
236 .max_sectors = 0xffff,
240 * fcoe_interface_setup() - Setup a FCoE interface
241 * @fcoe: The new FCoE interface
242 * @netdev: The net device that the fcoe interface is on
244 * Returns : 0 for success
245 * Locking: must be called with the RTNL mutex held
247 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
248 struct net_device *netdev)
250 struct fcoe_ctlr *fip = &fcoe->ctlr;
251 struct netdev_hw_addr *ha;
252 u8 flogi_maddr[ETH_ALEN];
253 const struct net_device_ops *ops;
255 fcoe->netdev = netdev;
257 /* Let LLD initialize for FCoE */
258 ops = netdev->netdev_ops;
259 if (ops->ndo_fcoe_enable) {
260 if (ops->ndo_fcoe_enable(netdev))
261 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
262 " specific feature for LLD.\n");
265 /* Do not support for bonding device */
266 if ((netdev->priv_flags & IFF_MASTER_ALB) ||
267 (netdev->priv_flags & IFF_SLAVE_INACTIVE) ||
268 (netdev->priv_flags & IFF_MASTER_8023AD)) {
269 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
273 /* look for SAN MAC address, if multiple SAN MACs exist, only
274 * use the first one for SPMA */
276 for_each_dev_addr(netdev, ha) {
277 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
278 (is_valid_ether_addr(ha->addr))) {
279 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
286 /* setup Source Mac Address */
288 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
291 * Add FCoE MAC address as second unicast MAC address
292 * or enter promiscuous mode if not capable of listening
293 * for multiple unicast MACs.
295 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
296 dev_unicast_add(netdev, flogi_maddr);
298 dev_unicast_add(netdev, fip->ctl_src_addr);
299 dev_mc_add(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
302 * setup the receive function from ethernet driver
303 * on the ethertype for the given device
305 fcoe->fcoe_packet_type.func = fcoe_rcv;
306 fcoe->fcoe_packet_type.type = __constant_htons(ETH_P_FCOE);
307 fcoe->fcoe_packet_type.dev = netdev;
308 dev_add_pack(&fcoe->fcoe_packet_type);
310 fcoe->fip_packet_type.func = fcoe_fip_recv;
311 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
312 fcoe->fip_packet_type.dev = netdev;
313 dev_add_pack(&fcoe->fip_packet_type);
319 * fcoe_interface_create() - Create a FCoE interface on a net device
320 * @netdev: The net device to create the FCoE interface on
322 * Returns: pointer to a struct fcoe_interface or NULL on error
324 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev)
326 struct fcoe_interface *fcoe;
329 fcoe = kzalloc(sizeof(*fcoe), GFP_KERNEL);
331 FCOE_NETDEV_DBG(netdev, "Could not allocate fcoe structure\n");
336 kref_init(&fcoe->kref);
341 fcoe_ctlr_init(&fcoe->ctlr);
342 fcoe->ctlr.send = fcoe_fip_send;
343 fcoe->ctlr.update_mac = fcoe_update_src_mac;
344 fcoe->ctlr.get_src_addr = fcoe_get_src_mac;
346 err = fcoe_interface_setup(fcoe, netdev);
348 fcoe_ctlr_destroy(&fcoe->ctlr);
358 * fcoe_interface_cleanup() - Clean up a FCoE interface
359 * @fcoe: The FCoE interface to be cleaned up
361 * Caller must be holding the RTNL mutex
363 void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
365 struct net_device *netdev = fcoe->netdev;
366 struct fcoe_ctlr *fip = &fcoe->ctlr;
367 u8 flogi_maddr[ETH_ALEN];
368 const struct net_device_ops *ops;
371 * Don't listen for Ethernet packets anymore.
372 * synchronize_net() ensures that the packet handlers are not running
373 * on another CPU. dev_remove_pack() would do that, this calls the
374 * unsyncronized version __dev_remove_pack() to avoid multiple delays.
376 __dev_remove_pack(&fcoe->fcoe_packet_type);
377 __dev_remove_pack(&fcoe->fip_packet_type);
380 /* Delete secondary MAC addresses */
381 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
382 dev_unicast_delete(netdev, flogi_maddr);
384 dev_unicast_delete(netdev, fip->ctl_src_addr);
385 dev_mc_delete(netdev, FIP_ALL_ENODE_MACS, ETH_ALEN, 0);
387 /* Tell the LLD we are done w/ FCoE */
388 ops = netdev->netdev_ops;
389 if (ops->ndo_fcoe_disable) {
390 if (ops->ndo_fcoe_disable(netdev))
391 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
392 " specific feature for LLD.\n");
397 * fcoe_interface_release() - fcoe_port kref release function
398 * @kref: Embedded reference count in an fcoe_interface struct
400 static void fcoe_interface_release(struct kref *kref)
402 struct fcoe_interface *fcoe;
403 struct net_device *netdev;
405 fcoe = container_of(kref, struct fcoe_interface, kref);
406 netdev = fcoe->netdev;
407 /* tear-down the FCoE controller */
408 fcoe_ctlr_destroy(&fcoe->ctlr);
414 * fcoe_interface_get() - Get a reference to a FCoE interface
415 * @fcoe: The FCoE interface to be held
417 static inline void fcoe_interface_get(struct fcoe_interface *fcoe)
419 kref_get(&fcoe->kref);
423 * fcoe_interface_put() - Put a reference to a FCoE interface
424 * @fcoe: The FCoE interface to be released
426 static inline void fcoe_interface_put(struct fcoe_interface *fcoe)
428 kref_put(&fcoe->kref, fcoe_interface_release);
432 * fcoe_fip_recv() - Handler for received FIP frames
433 * @skb: The receive skb
434 * @netdev: The associated net device
435 * @ptype: The packet_type structure which was used to register this handler
436 * @orig_dev: The original net_device the the skb was received on.
437 * (in case dev is a bond)
439 * Returns: 0 for success
441 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
442 struct packet_type *ptype,
443 struct net_device *orig_dev)
445 struct fcoe_interface *fcoe;
447 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
448 fcoe_ctlr_recv(&fcoe->ctlr, skb);
453 * fcoe_fip_send() - Send an Ethernet-encapsulated FIP frame
454 * @fip: The FCoE controller
455 * @skb: The FIP packet to be sent
457 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
459 skb->dev = fcoe_from_ctlr(fip)->netdev;
464 * fcoe_update_src_mac() - Update the Ethernet MAC filters
465 * @lport: The local port to update the source MAC on
466 * @addr: Unicast MAC address to add
468 * Remove any previously-set unicast MAC filter.
469 * Add secondary FCoE MAC address filter for our OUI.
471 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
473 struct fcoe_port *port = lport_priv(lport);
474 struct fcoe_interface *fcoe = port->fcoe;
477 if (!is_zero_ether_addr(port->data_src_addr))
478 dev_unicast_delete(fcoe->netdev, port->data_src_addr);
479 if (!is_zero_ether_addr(addr))
480 dev_unicast_add(fcoe->netdev, addr);
481 memcpy(port->data_src_addr, addr, ETH_ALEN);
486 * fcoe_get_src_mac() - return the Ethernet source address for an lport
487 * @lport: libfc lport
489 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
491 struct fcoe_port *port = lport_priv(lport);
493 return port->data_src_addr;
497 * fcoe_lport_config() - Set up a local port
498 * @lport: The local port to be setup
500 * Returns: 0 for success
502 static int fcoe_lport_config(struct fc_lport *lport)
506 lport->max_retry_count = 3;
507 lport->max_rport_retry_count = 3;
508 lport->e_d_tov = 2 * 1000; /* FC-FS default */
509 lport->r_a_tov = 2 * 2 * 1000;
510 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
511 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
512 lport->does_npiv = 1;
514 fc_lport_init_stats(lport);
516 /* lport fc_lport related configuration */
517 fc_lport_config(lport);
519 /* offload related configuration */
520 lport->crc_offload = 0;
521 lport->seq_offload = 0;
522 lport->lro_enabled = 0;
530 * fcoe_queue_timer() - The fcoe queue timer
531 * @lport: The local port
533 * Calls fcoe_check_wait_queue on timeout
535 static void fcoe_queue_timer(ulong lport)
537 fcoe_check_wait_queue((struct fc_lport *)lport, NULL);
541 * fcoe_netdev_config() - Set up net devive for SW FCoE
542 * @lport: The local port that is associated with the net device
543 * @netdev: The associated net device
545 * Must be called after fcoe_lport_config() as it will use local port mutex
547 * Returns: 0 for success
549 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
553 struct fcoe_interface *fcoe;
554 struct fcoe_port *port;
556 /* Setup lport private data to point to fcoe softc */
557 port = lport_priv(lport);
561 * Determine max frame size based on underlying device and optional
562 * user-configured limit. If the MFS is too low, fcoe_link_ok()
563 * will return 0, so do this first.
566 if (netdev->features & NETIF_F_FCOE_MTU) {
568 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
570 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
571 if (fc_set_mfs(lport, mfs))
574 /* offload features support */
575 if (netdev->features & NETIF_F_SG)
578 if (netdev->features & NETIF_F_FCOE_CRC) {
579 lport->crc_offload = 1;
580 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
582 if (netdev->features & NETIF_F_FSO) {
583 lport->seq_offload = 1;
584 lport->lso_max = netdev->gso_max_size;
585 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
588 if (netdev->fcoe_ddp_xid) {
589 lport->lro_enabled = 1;
590 lport->lro_xid = netdev->fcoe_ddp_xid;
591 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
594 skb_queue_head_init(&port->fcoe_pending_queue);
595 port->fcoe_pending_queue_active = 0;
596 setup_timer(&port->timer, fcoe_queue_timer, (unsigned long)lport);
599 wwnn = fcoe_wwn_from_mac(netdev->dev_addr, 1, 0);
600 fc_set_wwnn(lport, wwnn);
601 /* XXX - 3rd arg needs to be vlan id */
602 wwpn = fcoe_wwn_from_mac(netdev->dev_addr, 2, 0);
603 fc_set_wwpn(lport, wwpn);
610 * fcoe_shost_config() - Set up the SCSI host associated with a local port
611 * @lport: The local port
612 * @shost: The SCSI host to associate with the local port
613 * @dev: The device associated with the SCSI host
615 * Must be called after fcoe_lport_config() and fcoe_netdev_config()
617 * Returns: 0 for success
619 static int fcoe_shost_config(struct fc_lport *lport, struct Scsi_Host *shost,
624 /* lport scsi host config */
625 lport->host->max_lun = FCOE_MAX_LUN;
626 lport->host->max_id = FCOE_MAX_FCP_TARGET;
627 lport->host->max_channel = 0;
629 lport->host->transportt = fcoe_vport_transport_template;
631 lport->host->transportt = fcoe_transport_template;
633 /* add the new host to the SCSI-ml */
634 rc = scsi_add_host(lport->host, dev);
636 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
637 "error on scsi_add_host\n");
642 fc_host_max_npiv_vports(lport->host) = USHORT_MAX;
644 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
645 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
646 fcoe_netdev(lport)->name);
652 * fcoe_oem_match() - The match routine for the offloaded exchange manager
655 * This routine will be associated with an exchange manager (EM). When
656 * the libfc exchange handling code is looking for an EM to use it will
657 * call this routine and pass it the frame that it wishes to send. This
658 * routine will return True if the associated EM is to be used and False
659 * if the echange code should continue looking for an EM.
661 * The offload EM that this routine is associated with will handle any
662 * packets that are for SCSI read requests.
664 * Returns: True for read types I/O, otherwise returns false.
666 bool fcoe_oem_match(struct fc_frame *fp)
668 return fc_fcp_is_read(fr_fsp(fp)) &&
669 (fr_fsp(fp)->data_len > fcoe_ddp_min);
673 * fcoe_em_config() - Allocate and configure an exchange manager
674 * @lport: The local port that the new EM will be associated with
676 * Returns: 0 on success
678 static inline int fcoe_em_config(struct fc_lport *lport)
680 struct fcoe_port *port = lport_priv(lport);
681 struct fcoe_interface *fcoe = port->fcoe;
682 struct fcoe_interface *oldfcoe = NULL;
683 struct net_device *old_real_dev, *cur_real_dev;
684 u16 min_xid = FCOE_MIN_XID;
685 u16 max_xid = FCOE_MAX_XID;
688 * Check if need to allocate an em instance for
689 * offload exchange ids to be shared across all VN_PORTs/lport.
691 if (!lport->lro_enabled || !lport->lro_xid ||
692 (lport->lro_xid >= max_xid)) {
698 * Reuse existing offload em instance in case
699 * it is already allocated on real eth device
701 if (fcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
702 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
704 cur_real_dev = fcoe->netdev;
706 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
707 if (oldfcoe->netdev->priv_flags & IFF_802_1Q_VLAN)
708 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
710 old_real_dev = oldfcoe->netdev;
712 if (cur_real_dev == old_real_dev) {
713 fcoe->oem = oldfcoe->oem;
719 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
720 printk(KERN_ERR "fcoe_em_config: failed to add "
721 "offload em:%p on interface:%s\n",
722 fcoe->oem, fcoe->netdev->name);
726 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
727 FCOE_MIN_XID, lport->lro_xid,
730 printk(KERN_ERR "fcoe_em_config: failed to allocate "
731 "em for offload exches on interface:%s\n",
738 * Exclude offload EM xid range from next EM xid range.
740 min_xid += lport->lro_xid + 1;
743 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
744 printk(KERN_ERR "fcoe_em_config: failed to "
745 "allocate em on interface %s\n", fcoe->netdev->name);
753 * fcoe_if_destroy() - Tear down a SW FCoE instance
754 * @lport: The local port to be destroyed
756 static void fcoe_if_destroy(struct fc_lport *lport)
758 struct fcoe_port *port = lport_priv(lport);
759 struct fcoe_interface *fcoe = port->fcoe;
760 struct net_device *netdev = fcoe->netdev;
762 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
764 /* Logout of the fabric */
765 fc_fabric_logoff(lport);
767 /* Cleanup the fc_lport */
768 fc_lport_destroy(lport);
769 fc_fcp_destroy(lport);
771 /* Stop the transmit retry timer */
772 del_timer_sync(&port->timer);
774 /* Free existing transmit skbs */
775 fcoe_clean_pending_queue(lport);
778 if (!is_zero_ether_addr(port->data_src_addr))
779 dev_unicast_delete(netdev, port->data_src_addr);
782 /* receives may not be stopped until after this */
783 fcoe_interface_put(fcoe);
785 /* Free queued packets for the per-CPU receive threads */
786 fcoe_percpu_clean(lport);
788 /* Detach from the scsi-ml */
789 fc_remove_host(lport->host);
790 scsi_remove_host(lport->host);
792 /* There are no more rports or I/O, free the EM */
793 fc_exch_mgr_free(lport);
795 /* Free memory used by statistical counters */
796 fc_lport_free_stats(lport);
798 /* Release the Scsi_Host */
799 scsi_host_put(lport->host);
803 * fcoe_ddp_setup() - Call a LLD's ddp_setup through the net device
804 * @lport: The local port to setup DDP for
805 * @xid: The exchange ID for this DDP transfer
806 * @sgl: The scatterlist describing this transfer
807 * @sgc: The number of sg items
809 * Returns: 0 if the DDP context was not configured
811 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
812 struct scatterlist *sgl, unsigned int sgc)
814 struct net_device *netdev = fcoe_netdev(lport);
816 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
817 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
825 * fcoe_ddp_done() - Call a LLD's ddp_done through the net device
826 * @lport: The local port to complete DDP on
827 * @xid: The exchange ID for this DDP transfer
829 * Returns: the length of data that have been completed by DDP
831 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
833 struct net_device *netdev = fcoe_netdev(lport);
835 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
836 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
841 * fcoe_if_create() - Create a FCoE instance on an interface
842 * @fcoe: The FCoE interface to create a local port on
843 * @parent: The device pointer to be the parent in sysfs for the SCSI host
844 * @npiv: Indicates if the port is a vport or not
846 * Creates a fc_lport instance and a Scsi_Host instance and configure them.
848 * Returns: The allocated fc_lport or an error pointer
850 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
851 struct device *parent, int npiv)
853 struct net_device *netdev = fcoe->netdev;
854 struct fc_lport *lport = NULL;
855 struct fcoe_port *port;
856 struct Scsi_Host *shost;
859 * parent is only a vport if npiv is 1,
860 * but we'll only use vport in that case so go ahead and set it
862 struct fc_vport *vport = dev_to_vport(parent);
864 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
867 lport = libfc_host_alloc(&fcoe_shost_template,
868 sizeof(struct fcoe_port));
870 lport = libfc_vport_create(vport,
871 sizeof(struct fcoe_port));
874 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
879 port = lport_priv(lport);
882 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
884 /* configure a fc_lport including the exchange manager */
885 rc = fcoe_lport_config(lport);
887 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
893 FCOE_NETDEV_DBG(netdev, "Setting vport names, 0x%llX 0x%llX\n",
894 vport->node_name, vport->port_name);
895 fc_set_wwnn(lport, vport->node_name);
896 fc_set_wwpn(lport, vport->port_name);
899 /* configure lport network properties */
900 rc = fcoe_netdev_config(lport, netdev);
902 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
907 /* configure lport scsi host properties */
908 rc = fcoe_shost_config(lport, shost, parent);
910 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
915 /* Initialize the library */
916 rc = fcoe_libfc_config(lport, &fcoe_libfc_fcn_templ);
918 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
925 * fcoe_em_alloc() and fcoe_hostlist_add() both
926 * need to be atomic with respect to other changes to the
927 * hostlist since fcoe_em_alloc() looks for an existing EM
928 * instance on host list updated by fcoe_hostlist_add().
930 * This is currently handled through the fcoe_config_mutex
934 /* lport exch manager allocation */
935 rc = fcoe_em_config(lport);
937 FCOE_NETDEV_DBG(netdev, "Could not configure the EM "
938 "for the interface\n");
943 fcoe_interface_get(fcoe);
947 fc_exch_mgr_free(lport);
949 scsi_host_put(lport->host);
955 * fcoe_if_init() - Initialization routine for fcoe.ko
957 * Attaches the SW FCoE transport to the FC transport
959 * Returns: 0 on success
961 static int __init fcoe_if_init(void)
963 /* attach to scsi transport */
964 fcoe_transport_template = fc_attach_transport(&fcoe_transport_function);
965 fcoe_vport_transport_template =
966 fc_attach_transport(&fcoe_vport_transport_function);
968 if (!fcoe_transport_template) {
969 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
977 * fcoe_if_exit() - Tear down fcoe.ko
979 * Detaches the SW FCoE transport from the FC transport
981 * Returns: 0 on success
983 int __exit fcoe_if_exit(void)
985 fc_release_transport(fcoe_transport_template);
986 fc_release_transport(fcoe_vport_transport_template);
987 fcoe_transport_template = NULL;
988 fcoe_vport_transport_template = NULL;
993 * fcoe_percpu_thread_create() - Create a receive thread for an online CPU
994 * @cpu: The CPU index of the CPU to create a receive thread for
996 static void fcoe_percpu_thread_create(unsigned int cpu)
998 struct fcoe_percpu_s *p;
999 struct task_struct *thread;
1001 p = &per_cpu(fcoe_percpu, cpu);
1003 thread = kthread_create(fcoe_percpu_receive_thread,
1004 (void *)p, "fcoethread/%d", cpu);
1006 if (likely(!IS_ERR(thread))) {
1007 kthread_bind(thread, cpu);
1008 wake_up_process(thread);
1010 spin_lock_bh(&p->fcoe_rx_list.lock);
1012 spin_unlock_bh(&p->fcoe_rx_list.lock);
1017 * fcoe_percpu_thread_destroy() - Remove the receive thread of a CPU
1018 * @cpu: The CPU index of the CPU whose receive thread is to be destroyed
1020 * Destroys a per-CPU Rx thread. Any pending skbs are moved to the
1021 * current CPU's Rx thread. If the thread being destroyed is bound to
1022 * the CPU processing this context the skbs will be freed.
1024 static void fcoe_percpu_thread_destroy(unsigned int cpu)
1026 struct fcoe_percpu_s *p;
1027 struct task_struct *thread;
1028 struct page *crc_eof;
1029 struct sk_buff *skb;
1031 struct fcoe_percpu_s *p0;
1032 unsigned targ_cpu = smp_processor_id();
1033 #endif /* CONFIG_SMP */
1035 FCOE_DBG("Destroying receive thread for CPU %d\n", cpu);
1037 /* Prevent any new skbs from being queued for this CPU. */
1038 p = &per_cpu(fcoe_percpu, cpu);
1039 spin_lock_bh(&p->fcoe_rx_list.lock);
1042 crc_eof = p->crc_eof_page;
1043 p->crc_eof_page = NULL;
1044 p->crc_eof_offset = 0;
1045 spin_unlock_bh(&p->fcoe_rx_list.lock);
1049 * Don't bother moving the skb's if this context is running
1050 * on the same CPU that is having its thread destroyed. This
1051 * can easily happen when the module is removed.
1053 if (cpu != targ_cpu) {
1054 p0 = &per_cpu(fcoe_percpu, targ_cpu);
1055 spin_lock_bh(&p0->fcoe_rx_list.lock);
1057 FCOE_DBG("Moving frames from CPU %d to CPU %d\n",
1060 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1061 __skb_queue_tail(&p0->fcoe_rx_list, skb);
1062 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1065 * The targeted CPU is not initialized and cannot accept
1066 * new skbs. Unlock the targeted CPU and drop the skbs
1067 * on the CPU that is going offline.
1069 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1071 spin_unlock_bh(&p0->fcoe_rx_list.lock);
1075 * This scenario occurs when the module is being removed
1076 * and all threads are being destroyed. skbs will continue
1077 * to be shifted from the CPU thread that is being removed
1078 * to the CPU thread associated with the CPU that is processing
1079 * the module removal. Once there is only one CPU Rx thread it
1080 * will reach this case and we will drop all skbs and later
1083 spin_lock_bh(&p->fcoe_rx_list.lock);
1084 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1086 spin_unlock_bh(&p->fcoe_rx_list.lock);
1090 * This a non-SMP scenario where the singular Rx thread is
1091 * being removed. Free all skbs and stop the thread.
1093 spin_lock_bh(&p->fcoe_rx_list.lock);
1094 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) != NULL)
1096 spin_unlock_bh(&p->fcoe_rx_list.lock);
1100 kthread_stop(thread);
1107 * fcoe_cpu_callback() - Handler for CPU hotplug events
1108 * @nfb: The callback data block
1109 * @action: The event triggering the callback
1110 * @hcpu: The index of the CPU that the event is for
1112 * This creates or destroys per-CPU data for fcoe
1114 * Returns NOTIFY_OK always.
1116 static int fcoe_cpu_callback(struct notifier_block *nfb,
1117 unsigned long action, void *hcpu)
1119 unsigned cpu = (unsigned long)hcpu;
1123 case CPU_ONLINE_FROZEN:
1124 FCOE_DBG("CPU %x online: Create Rx thread\n", cpu);
1125 fcoe_percpu_thread_create(cpu);
1128 case CPU_DEAD_FROZEN:
1129 FCOE_DBG("CPU %x offline: Remove Rx thread\n", cpu);
1130 fcoe_percpu_thread_destroy(cpu);
1139 * fcoe_rcv() - Receive packets from a net device
1140 * @skb: The received packet
1141 * @netdev: The net device that the packet was received on
1142 * @ptype: The packet type context
1143 * @olddev: The last device net device
1145 * This routine is called by NET_RX_SOFTIRQ. It receives a packet, builds a
1146 * FC frame and passes the frame to libfc.
1148 * Returns: 0 for success
1150 int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1151 struct packet_type *ptype, struct net_device *olddev)
1153 struct fc_lport *lport;
1154 struct fcoe_rcv_info *fr;
1155 struct fcoe_interface *fcoe;
1156 struct fc_frame_header *fh;
1157 struct fcoe_percpu_s *fps;
1160 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1161 lport = fcoe->ctlr.lp;
1162 if (unlikely(!lport)) {
1163 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure");
1166 if (!lport->link_up)
1169 FCOE_NETDEV_DBG(netdev, "skb_info: len:%d data_len:%d head:%p "
1170 "data:%p tail:%p end:%p sum:%d dev:%s",
1171 skb->len, skb->data_len, skb->head, skb->data,
1172 skb_tail_pointer(skb), skb_end_pointer(skb),
1173 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1175 /* check for FCOE packet type */
1176 if (unlikely(eth_hdr(skb)->h_proto != htons(ETH_P_FCOE))) {
1177 FCOE_NETDEV_DBG(netdev, "Wrong FC type frame");
1182 * Check for minimum frame length, and make sure required FCoE
1183 * and FC headers are pulled into the linear data area.
1185 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1186 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1189 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1190 fh = (struct fc_frame_header *) skb_transport_header(skb);
1192 fr = fcoe_dev_from_skb(skb);
1197 * In case the incoming frame's exchange is originated from
1198 * the initiator, then received frame's exchange id is ANDed
1199 * with fc_cpu_mask bits to get the same cpu on which exchange
1200 * was originated, otherwise just use the current cpu.
1202 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1203 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1205 cpu = smp_processor_id();
1207 fps = &per_cpu(fcoe_percpu, cpu);
1208 spin_lock_bh(&fps->fcoe_rx_list.lock);
1209 if (unlikely(!fps->thread)) {
1211 * The targeted CPU is not ready, let's target
1212 * the first CPU now. For non-SMP systems this
1213 * will check the same CPU twice.
1215 FCOE_NETDEV_DBG(netdev, "CPU is online, but no receive thread "
1216 "ready for incoming skb- using first online "
1219 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1220 cpu = first_cpu(cpu_online_map);
1221 fps = &per_cpu(fcoe_percpu, cpu);
1222 spin_lock_bh(&fps->fcoe_rx_list.lock);
1224 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1230 * We now have a valid CPU that we're targeting for
1231 * this skb. We also have this receive thread locked,
1232 * so we're free to queue skbs into it's queue.
1234 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1235 if (fps->fcoe_rx_list.qlen == 1)
1236 wake_up_process(fps->thread);
1238 spin_unlock_bh(&fps->fcoe_rx_list.lock);
1242 fc_lport_get_stats(lport)->ErrorFrames++;
1250 * fcoe_start_io() - Start FCoE I/O
1251 * @skb: The packet to be transmitted
1253 * This routine is called from the net device to start transmitting
1256 * Returns: 0 for success
1258 static inline int fcoe_start_io(struct sk_buff *skb)
1263 rc = dev_queue_xmit(skb);
1271 * fcoe_get_paged_crc_eof() - Allocate a page to be used for the trailer CRC
1272 * @skb: The packet to be transmitted
1273 * @tlen: The total length of the trailer
1275 * This routine allocates a page for frame trailers. The page is re-used if
1276 * there is enough room left on it for the current trailer. If there isn't
1277 * enough buffer left a new page is allocated for the trailer. Reference to
1278 * the page from this function as well as the skbs using the page fragments
1279 * ensure that the page is freed at the appropriate time.
1281 * Returns: 0 for success
1283 static int fcoe_get_paged_crc_eof(struct sk_buff *skb, int tlen)
1285 struct fcoe_percpu_s *fps;
1288 fps = &get_cpu_var(fcoe_percpu);
1289 page = fps->crc_eof_page;
1291 page = alloc_page(GFP_ATOMIC);
1293 put_cpu_var(fcoe_percpu);
1296 fps->crc_eof_page = page;
1297 fps->crc_eof_offset = 0;
1301 skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, page,
1302 fps->crc_eof_offset, tlen);
1304 skb->data_len += tlen;
1305 skb->truesize += tlen;
1306 fps->crc_eof_offset += sizeof(struct fcoe_crc_eof);
1308 if (fps->crc_eof_offset >= PAGE_SIZE) {
1309 fps->crc_eof_page = NULL;
1310 fps->crc_eof_offset = 0;
1313 put_cpu_var(fcoe_percpu);
1318 * fcoe_fc_crc() - Calculates the CRC for a given frame
1319 * @fp: The frame to be checksumed
1321 * This uses crc32() routine to calculate the CRC for a frame
1323 * Return: The 32 bit CRC value
1325 u32 fcoe_fc_crc(struct fc_frame *fp)
1327 struct sk_buff *skb = fp_skb(fp);
1328 struct skb_frag_struct *frag;
1329 unsigned char *data;
1330 unsigned long off, len, clen;
1334 crc = crc32(~0, skb->data, skb_headlen(skb));
1336 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1337 frag = &skb_shinfo(skb)->frags[i];
1338 off = frag->page_offset;
1341 clen = min(len, PAGE_SIZE - (off & ~PAGE_MASK));
1342 data = kmap_atomic(frag->page + (off >> PAGE_SHIFT),
1343 KM_SKB_DATA_SOFTIRQ);
1344 crc = crc32(crc, data + (off & ~PAGE_MASK), clen);
1345 kunmap_atomic(data, KM_SKB_DATA_SOFTIRQ);
1354 * fcoe_xmit() - Transmit a FCoE frame
1355 * @lport: The local port that the frame is to be transmitted for
1356 * @fp: The frame to be transmitted
1358 * Return: 0 for success
1360 int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1365 struct fcoe_crc_eof *cp;
1366 struct sk_buff *skb;
1367 struct fcoe_dev_stats *stats;
1368 struct fc_frame_header *fh;
1369 unsigned int hlen; /* header length implies the version */
1370 unsigned int tlen; /* trailer length */
1371 unsigned int elen; /* eth header, may include vlan */
1372 struct fcoe_port *port = lport_priv(lport);
1373 struct fcoe_interface *fcoe = port->fcoe;
1375 struct fcoe_hdr *hp;
1377 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1379 fh = fc_frame_header_get(fp);
1381 wlen = skb->len / FCOE_WORD_TO_BYTE;
1383 if (!lport->link_up) {
1388 if (unlikely(fh->fh_r_ctl == FC_RCTL_ELS_REQ) &&
1389 fcoe_ctlr_els_send(&fcoe->ctlr, lport, skb))
1395 elen = sizeof(struct ethhdr);
1396 hlen = sizeof(struct fcoe_hdr);
1397 tlen = sizeof(struct fcoe_crc_eof);
1398 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1401 if (likely(lport->crc_offload)) {
1402 skb->ip_summed = CHECKSUM_PARTIAL;
1403 skb->csum_start = skb_headroom(skb);
1404 skb->csum_offset = skb->len;
1407 skb->ip_summed = CHECKSUM_NONE;
1408 crc = fcoe_fc_crc(fp);
1411 /* copy port crc and eof to the skb buff */
1412 if (skb_is_nonlinear(skb)) {
1414 if (fcoe_get_paged_crc_eof(skb, tlen)) {
1418 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1419 cp = kmap_atomic(frag->page, KM_SKB_DATA_SOFTIRQ)
1420 + frag->page_offset;
1422 cp = (struct fcoe_crc_eof *)skb_put(skb, tlen);
1425 memset(cp, 0, sizeof(*cp));
1427 cp->fcoe_crc32 = cpu_to_le32(~crc);
1429 if (skb_is_nonlinear(skb)) {
1430 kunmap_atomic(cp, KM_SKB_DATA_SOFTIRQ);
1434 /* adjust skb network/transport offsets to match mac/fcoe/port */
1435 skb_push(skb, elen + hlen);
1436 skb_reset_mac_header(skb);
1437 skb_reset_network_header(skb);
1438 skb->mac_len = elen;
1439 skb->protocol = htons(ETH_P_FCOE);
1440 skb->dev = fcoe->netdev;
1442 /* fill up mac and fcoe headers */
1444 eh->h_proto = htons(ETH_P_FCOE);
1445 if (fcoe->ctlr.map_dest)
1446 fc_fcoe_set_mac(eh->h_dest, fh->fh_d_id);
1448 /* insert GW address */
1449 memcpy(eh->h_dest, fcoe->ctlr.dest_addr, ETH_ALEN);
1451 if (unlikely(fcoe->ctlr.flogi_oxid != FC_XID_UNKNOWN))
1452 memcpy(eh->h_source, fcoe->ctlr.ctl_src_addr, ETH_ALEN);
1454 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1456 hp = (struct fcoe_hdr *)(eh + 1);
1457 memset(hp, 0, sizeof(*hp));
1459 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1462 /* fcoe lso, mss is in max_payload which is non-zero for FCP data */
1463 if (lport->seq_offload && fr_max_payload(fp)) {
1464 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1465 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1467 skb_shinfo(skb)->gso_type = 0;
1468 skb_shinfo(skb)->gso_size = 0;
1470 /* update tx stats: regardless if LLD fails */
1471 stats = fc_lport_get_stats(lport);
1473 stats->TxWords += wlen;
1475 /* send down to lld */
1477 if (port->fcoe_pending_queue.qlen)
1478 fcoe_check_wait_queue(lport, skb);
1479 else if (fcoe_start_io(skb))
1480 fcoe_check_wait_queue(lport, skb);
1486 * fcoe_percpu_flush_done() - Indicate per-CPU queue flush completion
1487 * @skb: The completed skb (argument required by destructor)
1489 static void fcoe_percpu_flush_done(struct sk_buff *skb)
1491 complete(&fcoe_flush_completion);
1495 * fcoe_percpu_receive_thread() - The per-CPU packet receive thread
1496 * @arg: The per-CPU context
1498 * Return: 0 for success
1500 int fcoe_percpu_receive_thread(void *arg)
1502 struct fcoe_percpu_s *p = arg;
1504 struct fc_lport *lport;
1505 struct fcoe_rcv_info *fr;
1506 struct fcoe_dev_stats *stats;
1507 struct fc_frame_header *fh;
1508 struct sk_buff *skb;
1509 struct fcoe_crc_eof crc_eof;
1510 struct fc_frame *fp;
1512 struct fcoe_port *port;
1513 struct fcoe_hdr *hp;
1515 set_user_nice(current, -20);
1517 while (!kthread_should_stop()) {
1519 spin_lock_bh(&p->fcoe_rx_list.lock);
1520 while ((skb = __skb_dequeue(&p->fcoe_rx_list)) == NULL) {
1521 set_current_state(TASK_INTERRUPTIBLE);
1522 spin_unlock_bh(&p->fcoe_rx_list.lock);
1524 set_current_state(TASK_RUNNING);
1525 if (kthread_should_stop())
1527 spin_lock_bh(&p->fcoe_rx_list.lock);
1529 spin_unlock_bh(&p->fcoe_rx_list.lock);
1530 fr = fcoe_dev_from_skb(skb);
1532 if (unlikely(!lport)) {
1533 if (skb->destructor != fcoe_percpu_flush_done)
1534 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb");
1539 FCOE_NETDEV_DBG(skb->dev, "skb_info: len:%d data_len:%d "
1540 "head:%p data:%p tail:%p end:%p sum:%d dev:%s",
1541 skb->len, skb->data_len,
1542 skb->head, skb->data, skb_tail_pointer(skb),
1543 skb_end_pointer(skb), skb->csum,
1544 skb->dev ? skb->dev->name : "<NULL>");
1547 * Save source MAC address before discarding header.
1549 port = lport_priv(lport);
1550 if (skb_is_nonlinear(skb))
1551 skb_linearize(skb); /* not ideal */
1552 mac = eth_hdr(skb)->h_source;
1555 * Frame length checks and setting up the header pointers
1556 * was done in fcoe_rcv already.
1558 hp = (struct fcoe_hdr *) skb_network_header(skb);
1559 fh = (struct fc_frame_header *) skb_transport_header(skb);
1561 stats = fc_lport_get_stats(lport);
1562 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1563 if (stats->ErrorFrames < 5)
1564 printk(KERN_WARNING "fcoe: FCoE version "
1565 "mismatch: The frame has "
1566 "version %x, but the "
1567 "initiator supports version "
1568 "%x\n", FC_FCOE_DECAPS_VER(hp),
1570 stats->ErrorFrames++;
1575 skb_pull(skb, sizeof(struct fcoe_hdr));
1576 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1579 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1581 fp = (struct fc_frame *)skb;
1584 fr_sof(fp) = hp->fcoe_sof;
1586 /* Copy out the CRC and EOF trailer for access */
1587 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof))) {
1591 fr_eof(fp) = crc_eof.fcoe_eof;
1592 fr_crc(fp) = crc_eof.fcoe_crc32;
1593 if (pskb_trim(skb, fr_len)) {
1599 * We only check CRC if no offload is available and if it is
1600 * it's solicited data, in which case, the FCP layer would
1601 * check it during the copy.
1603 if (lport->crc_offload &&
1604 skb->ip_summed == CHECKSUM_UNNECESSARY)
1605 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1607 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1609 fh = fc_frame_header_get(fp);
1610 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA &&
1611 fh->fh_type == FC_TYPE_FCP) {
1612 fc_exch_recv(lport, fp);
1615 if (fr_flags(fp) & FCPHF_CRC_UNCHECKED) {
1616 if (le32_to_cpu(fr_crc(fp)) !=
1617 ~crc32(~0, skb->data, fr_len)) {
1618 if (stats->InvalidCRCCount < 5)
1619 printk(KERN_WARNING "fcoe: dropping "
1620 "frame with CRC error\n");
1621 stats->InvalidCRCCount++;
1622 stats->ErrorFrames++;
1626 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1628 fc_exch_recv(lport, fp);
1634 * fcoe_check_wait_queue() - Attempt to clear the transmit backlog
1635 * @lport: The local port whose backlog is to be cleared
1637 * This empties the wait_queue, dequeues the head of the wait_queue queue
1638 * and calls fcoe_start_io() for each packet. If all skb have been
1639 * transmitted it returns the qlen. If an error occurs it restores
1640 * wait_queue (to try again later) and returns -1.
1642 * The wait_queue is used when the skb transmit fails. The failed skb
1643 * will go in the wait_queue which will be emptied by the timer function or
1644 * by the next skb transmit.
1646 static void fcoe_check_wait_queue(struct fc_lport *lport, struct sk_buff *skb)
1648 struct fcoe_port *port = lport_priv(lport);
1651 spin_lock_bh(&port->fcoe_pending_queue.lock);
1654 __skb_queue_tail(&port->fcoe_pending_queue, skb);
1656 if (port->fcoe_pending_queue_active)
1658 port->fcoe_pending_queue_active = 1;
1660 while (port->fcoe_pending_queue.qlen) {
1661 /* keep qlen > 0 until fcoe_start_io succeeds */
1662 port->fcoe_pending_queue.qlen++;
1663 skb = __skb_dequeue(&port->fcoe_pending_queue);
1665 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1666 rc = fcoe_start_io(skb);
1667 spin_lock_bh(&port->fcoe_pending_queue.lock);
1670 __skb_queue_head(&port->fcoe_pending_queue, skb);
1671 /* undo temporary increment above */
1672 port->fcoe_pending_queue.qlen--;
1675 /* undo temporary increment above */
1676 port->fcoe_pending_queue.qlen--;
1679 if (port->fcoe_pending_queue.qlen < FCOE_LOW_QUEUE_DEPTH)
1681 if (port->fcoe_pending_queue.qlen && !timer_pending(&port->timer))
1682 mod_timer(&port->timer, jiffies + 2);
1683 port->fcoe_pending_queue_active = 0;
1685 if (port->fcoe_pending_queue.qlen > FCOE_MAX_QUEUE_DEPTH)
1687 spin_unlock_bh(&port->fcoe_pending_queue.lock);
1692 * fcoe_dev_setup() - Setup the link change notification interface
1694 static void fcoe_dev_setup(void)
1696 register_netdevice_notifier(&fcoe_notifier);
1700 * fcoe_dev_cleanup() - Cleanup the link change notification interface
1702 static void fcoe_dev_cleanup(void)
1704 unregister_netdevice_notifier(&fcoe_notifier);
1708 * fcoe_device_notification() - Handler for net device events
1709 * @notifier: The context of the notification
1710 * @event: The type of event
1711 * @ptr: The net device that the event was on
1713 * This function is called by the Ethernet driver in case of link change event.
1715 * Returns: 0 for success
1717 static int fcoe_device_notification(struct notifier_block *notifier,
1718 ulong event, void *ptr)
1720 struct fc_lport *lport = NULL;
1721 struct net_device *netdev = ptr;
1722 struct fcoe_interface *fcoe;
1723 struct fcoe_port *port;
1724 struct fcoe_dev_stats *stats;
1725 u32 link_possible = 1;
1729 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1730 if (fcoe->netdev == netdev) {
1731 lport = fcoe->ctlr.lp;
1742 case NETDEV_GOING_DOWN:
1748 case NETDEV_CHANGEMTU:
1749 if (netdev->features & NETIF_F_FCOE_MTU)
1751 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1752 sizeof(struct fcoe_crc_eof));
1753 if (mfs >= FC_MIN_MAX_FRAME)
1754 fc_set_mfs(lport, mfs);
1756 case NETDEV_REGISTER:
1758 case NETDEV_UNREGISTER:
1759 list_del(&fcoe->list);
1760 port = lport_priv(fcoe->ctlr.lp);
1761 fcoe_interface_cleanup(fcoe);
1762 schedule_work(&port->destroy_work);
1766 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1767 "from netdev netlink\n", event);
1769 if (link_possible && !fcoe_link_ok(lport))
1770 fcoe_ctlr_link_up(&fcoe->ctlr);
1771 else if (fcoe_ctlr_link_down(&fcoe->ctlr)) {
1772 stats = fc_lport_get_stats(lport);
1773 stats->LinkFailureCount++;
1774 fcoe_clean_pending_queue(lport);
1781 * fcoe_if_to_netdev() - Parse a name buffer to get a net device
1782 * @buffer: The name of the net device
1784 * Returns: NULL or a ptr to net_device
1786 static struct net_device *fcoe_if_to_netdev(const char *buffer)
1789 char ifname[IFNAMSIZ + 2];
1792 strlcpy(ifname, buffer, IFNAMSIZ);
1793 cp = ifname + strlen(ifname);
1794 while (--cp >= ifname && *cp == '\n')
1796 return dev_get_by_name(&init_net, ifname);
1802 * fcoe_destroy() - Destroy a FCoE interface
1803 * @buffer: The name of the Ethernet interface to be destroyed
1804 * @kp: The associated kernel parameter
1806 * Called from sysfs.
1808 * Returns: 0 for success
1810 static int fcoe_destroy(const char *buffer, struct kernel_param *kp)
1812 struct fcoe_interface *fcoe;
1813 struct net_device *netdev;
1816 mutex_lock(&fcoe_config_mutex);
1817 #ifdef CONFIG_FCOE_MODULE
1819 * Make sure the module has been initialized, and is not about to be
1820 * removed. Module paramter sysfs files are writable before the
1821 * module_init function is called and after module_exit.
1823 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1829 netdev = fcoe_if_to_netdev(buffer);
1836 fcoe = fcoe_hostlist_lookup_port(netdev);
1842 list_del(&fcoe->list);
1843 fcoe_interface_cleanup(fcoe);
1845 fcoe_if_destroy(fcoe->ctlr.lp);
1849 mutex_unlock(&fcoe_config_mutex);
1854 * fcoe_destroy_work() - Destroy a FCoE port in a deferred work context
1855 * @work: Handle to the FCoE port to be destroyed
1857 static void fcoe_destroy_work(struct work_struct *work)
1859 struct fcoe_port *port;
1861 port = container_of(work, struct fcoe_port, destroy_work);
1862 mutex_lock(&fcoe_config_mutex);
1863 fcoe_if_destroy(port->lport);
1864 mutex_unlock(&fcoe_config_mutex);
1868 * fcoe_create() - Create a fcoe interface
1869 * @buffer: The name of the Ethernet interface to create on
1870 * @kp: The associated kernel param
1872 * Called from sysfs.
1874 * Returns: 0 for success
1876 static int fcoe_create(const char *buffer, struct kernel_param *kp)
1879 struct fcoe_interface *fcoe;
1880 struct fc_lport *lport;
1881 struct net_device *netdev;
1883 mutex_lock(&fcoe_config_mutex);
1884 #ifdef CONFIG_FCOE_MODULE
1886 * Make sure the module has been initialized, and is not about to be
1887 * removed. Module paramter sysfs files are writable before the
1888 * module_init function is called and after module_exit.
1890 if (THIS_MODULE->state != MODULE_STATE_LIVE) {
1897 netdev = fcoe_if_to_netdev(buffer);
1903 /* look for existing lport */
1904 if (fcoe_hostlist_lookup(netdev)) {
1909 fcoe = fcoe_interface_create(netdev);
1915 lport = fcoe_if_create(fcoe, &netdev->dev, 0);
1916 if (IS_ERR(lport)) {
1917 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
1920 fcoe_interface_cleanup(fcoe);
1924 /* Make this the "master" N_Port */
1925 fcoe->ctlr.lp = lport;
1927 /* add to lports list */
1928 fcoe_hostlist_add(lport);
1930 /* start FIP Discovery and FLOGI */
1931 lport->boot_time = jiffies;
1932 fc_fabric_login(lport);
1933 if (!fcoe_link_ok(lport))
1934 fcoe_ctlr_link_up(&fcoe->ctlr);
1939 * Release from init in fcoe_interface_create(), on success lport
1940 * should be holding a reference taken in fcoe_if_create().
1942 fcoe_interface_put(fcoe);
1947 mutex_unlock(&fcoe_config_mutex);
1952 * fcoe_link_ok() - Check if the link is OK for a local port
1953 * @lport: The local port to check link on
1955 * Any permanently-disqualifying conditions have been previously checked.
1956 * This also updates the speed setting, which may change with link for 100/1000.
1958 * This function should probably be checking for PAUSE support at some point
1959 * in the future. Currently Per-priority-pause is not determinable using
1960 * ethtool, so we shouldn't be restrictive until that problem is resolved.
1962 * Returns: 0 if link is OK for use by FCoE.
1965 int fcoe_link_ok(struct fc_lport *lport)
1967 struct fcoe_port *port = lport_priv(lport);
1968 struct net_device *netdev = port->fcoe->netdev;
1969 struct ethtool_cmd ecmd = { ETHTOOL_GSET };
1971 if ((netdev->flags & IFF_UP) && netif_carrier_ok(netdev) &&
1972 (!dev_ethtool_get_settings(netdev, &ecmd))) {
1973 lport->link_supported_speeds &=
1974 ~(FC_PORTSPEED_1GBIT | FC_PORTSPEED_10GBIT);
1975 if (ecmd.supported & (SUPPORTED_1000baseT_Half |
1976 SUPPORTED_1000baseT_Full))
1977 lport->link_supported_speeds |= FC_PORTSPEED_1GBIT;
1978 if (ecmd.supported & SUPPORTED_10000baseT_Full)
1979 lport->link_supported_speeds |=
1980 FC_PORTSPEED_10GBIT;
1981 if (ecmd.speed == SPEED_1000)
1982 lport->link_speed = FC_PORTSPEED_1GBIT;
1983 if (ecmd.speed == SPEED_10000)
1984 lport->link_speed = FC_PORTSPEED_10GBIT;
1992 * fcoe_percpu_clean() - Clear all pending skbs for an local port
1993 * @lport: The local port whose skbs are to be cleared
1995 * Must be called with fcoe_create_mutex held to single-thread completion.
1997 * This flushes the pending skbs by adding a new skb to each queue and
1998 * waiting until they are all freed. This assures us that not only are
1999 * there no packets that will be handled by the lport, but also that any
2000 * threads already handling packet have returned.
2002 void fcoe_percpu_clean(struct fc_lport *lport)
2004 struct fcoe_percpu_s *pp;
2005 struct fcoe_rcv_info *fr;
2006 struct sk_buff_head *list;
2007 struct sk_buff *skb, *next;
2008 struct sk_buff *head;
2011 for_each_possible_cpu(cpu) {
2012 pp = &per_cpu(fcoe_percpu, cpu);
2013 spin_lock_bh(&pp->fcoe_rx_list.lock);
2014 list = &pp->fcoe_rx_list;
2016 for (skb = head; skb != (struct sk_buff *)list;
2019 fr = fcoe_dev_from_skb(skb);
2020 if (fr->fr_dev == lport) {
2021 __skb_unlink(skb, list);
2026 if (!pp->thread || !cpu_online(cpu)) {
2027 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2031 skb = dev_alloc_skb(0);
2033 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2036 skb->destructor = fcoe_percpu_flush_done;
2038 __skb_queue_tail(&pp->fcoe_rx_list, skb);
2039 if (pp->fcoe_rx_list.qlen == 1)
2040 wake_up_process(pp->thread);
2041 spin_unlock_bh(&pp->fcoe_rx_list.lock);
2043 wait_for_completion(&fcoe_flush_completion);
2048 * fcoe_clean_pending_queue() - Dequeue a skb and free it
2049 * @lport: The local port to dequeue a skb on
2051 void fcoe_clean_pending_queue(struct fc_lport *lport)
2053 struct fcoe_port *port = lport_priv(lport);
2054 struct sk_buff *skb;
2056 spin_lock_bh(&port->fcoe_pending_queue.lock);
2057 while ((skb = __skb_dequeue(&port->fcoe_pending_queue)) != NULL) {
2058 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2060 spin_lock_bh(&port->fcoe_pending_queue.lock);
2062 spin_unlock_bh(&port->fcoe_pending_queue.lock);
2066 * fcoe_reset() - Reset a local port
2067 * @shost: The SCSI host associated with the local port to be reset
2069 * Returns: Always 0 (return value required by FC transport template)
2071 int fcoe_reset(struct Scsi_Host *shost)
2073 struct fc_lport *lport = shost_priv(shost);
2074 fc_lport_reset(lport);
2079 * fcoe_hostlist_lookup_port() - Find the FCoE interface associated with a net device
2080 * @netdev: The net device used as a key
2082 * Locking: Must be called with the RNL mutex held.
2084 * Returns: NULL or the FCoE interface
2086 static struct fcoe_interface *
2087 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2089 struct fcoe_interface *fcoe;
2091 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2092 if (fcoe->netdev == netdev)
2099 * fcoe_hostlist_lookup() - Find the local port associated with a
2101 * @netdev: The netdevice used as a key
2103 * Locking: Must be called with the RTNL mutex held
2105 * Returns: NULL or the local port
2107 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2109 struct fcoe_interface *fcoe;
2111 fcoe = fcoe_hostlist_lookup_port(netdev);
2112 return (fcoe) ? fcoe->ctlr.lp : NULL;
2116 * fcoe_hostlist_add() - Add the FCoE interface identified by a local
2117 * port to the hostlist
2118 * @lport: The local port that identifies the FCoE interface to be added
2120 * Locking: must be called with the RTNL mutex held
2122 * Returns: 0 for success
2124 static int fcoe_hostlist_add(const struct fc_lport *lport)
2126 struct fcoe_interface *fcoe;
2127 struct fcoe_port *port;
2129 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2131 port = lport_priv(lport);
2133 list_add_tail(&fcoe->list, &fcoe_hostlist);
2139 * fcoe_init() - Initialize fcoe.ko
2141 * Returns: 0 on success, or a negative value on failure
2143 static int __init fcoe_init(void)
2145 struct fcoe_percpu_s *p;
2149 mutex_lock(&fcoe_config_mutex);
2151 for_each_possible_cpu(cpu) {
2152 p = &per_cpu(fcoe_percpu, cpu);
2153 skb_queue_head_init(&p->fcoe_rx_list);
2156 for_each_online_cpu(cpu)
2157 fcoe_percpu_thread_create(cpu);
2159 /* Initialize per CPU interrupt thread */
2160 rc = register_hotcpu_notifier(&fcoe_cpu_notifier);
2164 /* Setup link change notification */
2167 rc = fcoe_if_init();
2171 mutex_unlock(&fcoe_config_mutex);
2175 for_each_online_cpu(cpu) {
2176 fcoe_percpu_thread_destroy(cpu);
2178 mutex_unlock(&fcoe_config_mutex);
2181 module_init(fcoe_init);
2184 * fcoe_exit() - Clean up fcoe.ko
2186 * Returns: 0 on success or a negative value on failure
2188 static void __exit fcoe_exit(void)
2190 struct fcoe_interface *fcoe, *tmp;
2191 struct fcoe_port *port;
2194 mutex_lock(&fcoe_config_mutex);
2198 /* releases the associated fcoe hosts */
2200 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2201 list_del(&fcoe->list);
2202 port = lport_priv(fcoe->ctlr.lp);
2203 fcoe_interface_cleanup(fcoe);
2204 schedule_work(&port->destroy_work);
2208 unregister_hotcpu_notifier(&fcoe_cpu_notifier);
2210 for_each_online_cpu(cpu)
2211 fcoe_percpu_thread_destroy(cpu);
2213 mutex_unlock(&fcoe_config_mutex);
2215 /* flush any asyncronous interface destroys,
2216 * this should happen after the netdev notifier is unregistered */
2217 flush_scheduled_work();
2218 /* That will flush out all the N_Ports on the hostlist, but now we
2219 * may have NPIV VN_Ports scheduled for destruction */
2220 flush_scheduled_work();
2222 /* detach from scsi transport
2223 * must happen after all destroys are done, therefor after the flush */
2226 module_exit(fcoe_exit);
2229 * fcoe_flogi_resp() - FCoE specific FLOGI and FDISC response handler
2230 * @seq: active sequence in the FLOGI or FDISC exchange
2231 * @fp: response frame, or error encoded in a pointer (timeout)
2232 * @arg: pointer the the fcoe_ctlr structure
2234 * This handles MAC address managment for FCoE, then passes control on to
2235 * the libfc FLOGI response handler.
2237 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2239 struct fcoe_ctlr *fip = arg;
2240 struct fc_exch *exch = fc_seq_exch(seq);
2241 struct fc_lport *lport = exch->lp;
2247 mac = fr_cb(fp)->granted_mac;
2248 if (is_zero_ether_addr(mac)) {
2250 if (fcoe_ctlr_recv_flogi(fip, lport, fp)) {
2255 fcoe_update_src_mac(lport, mac);
2257 fc_lport_flogi_resp(seq, fp, lport);
2261 * fcoe_logo_resp() - FCoE specific LOGO response handler
2262 * @seq: active sequence in the LOGO exchange
2263 * @fp: response frame, or error encoded in a pointer (timeout)
2264 * @arg: pointer the the fcoe_ctlr structure
2266 * This handles MAC address managment for FCoE, then passes control on to
2267 * the libfc LOGO response handler.
2269 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2271 struct fc_lport *lport = arg;
2272 static u8 zero_mac[ETH_ALEN] = { 0 };
2275 fcoe_update_src_mac(lport, zero_mac);
2276 fc_lport_logo_resp(seq, fp, lport);
2280 * fcoe_elsct_send - FCoE specific ELS handler
2282 * This does special case handling of FIP encapsualted ELS exchanges for FCoE,
2283 * using FCoE specific response handlers and passing the FIP controller as
2284 * the argument (the lport is still available from the exchange).
2286 * Most of the work here is just handed off to the libfc routine.
2288 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2289 struct fc_frame *fp, unsigned int op,
2290 void (*resp)(struct fc_seq *,
2293 void *arg, u32 timeout)
2295 struct fcoe_port *port = lport_priv(lport);
2296 struct fcoe_interface *fcoe = port->fcoe;
2297 struct fcoe_ctlr *fip = &fcoe->ctlr;
2298 struct fc_frame_header *fh = fc_frame_header_get(fp);
2303 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2306 /* only hook onto fabric logouts, not port logouts */
2307 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2309 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2312 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2316 * fcoe_vport_create() - create an fc_host/scsi_host for a vport
2317 * @vport: fc_vport object to create a new fc_host for
2318 * @disabled: start the new fc_host in a disabled state by default?
2320 * Returns: 0 for success
2322 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2324 struct Scsi_Host *shost = vport_to_shost(vport);
2325 struct fc_lport *n_port = shost_priv(shost);
2326 struct fcoe_port *port = lport_priv(n_port);
2327 struct fcoe_interface *fcoe = port->fcoe;
2328 struct net_device *netdev = fcoe->netdev;
2329 struct fc_lport *vn_port;
2331 mutex_lock(&fcoe_config_mutex);
2332 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2333 mutex_unlock(&fcoe_config_mutex);
2335 if (IS_ERR(vn_port)) {
2336 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2342 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2344 vn_port->boot_time = jiffies;
2345 fc_fabric_login(vn_port);
2346 fc_vport_setlink(vn_port);
2352 * fcoe_vport_destroy() - destroy the fc_host/scsi_host for a vport
2353 * @vport: fc_vport object that is being destroyed
2355 * Returns: 0 for success
2357 static int fcoe_vport_destroy(struct fc_vport *vport)
2359 struct Scsi_Host *shost = vport_to_shost(vport);
2360 struct fc_lport *n_port = shost_priv(shost);
2361 struct fc_lport *vn_port = vport->dd_data;
2362 struct fcoe_port *port = lport_priv(vn_port);
2364 mutex_lock(&n_port->lp_mutex);
2365 list_del(&vn_port->list);
2366 mutex_unlock(&n_port->lp_mutex);
2367 schedule_work(&port->destroy_work);
2372 * fcoe_vport_disable() - change vport state
2373 * @vport: vport to bring online/offline
2374 * @disable: should the vport be disabled?
2376 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2378 struct fc_lport *lport = vport->dd_data;
2381 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2382 fc_fabric_logoff(lport);
2384 lport->boot_time = jiffies;
2385 fc_fabric_login(lport);
2386 fc_vport_setlink(lport);
2393 * fcoe_vport_set_symbolic_name() - append vport string to symbolic name
2394 * @vport: fc_vport with a new symbolic name string
2396 * After generating a new symbolic name string, a new RSPN_ID request is
2397 * sent to the name server. There is no response handler, so if it fails
2398 * for some reason it will not be retried.
2400 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2402 struct fc_lport *lport = vport->dd_data;
2403 struct fc_frame *fp;
2406 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2407 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2408 fcoe_netdev(lport)->name, vport->symbolic_name);
2410 if (lport->state != LPORT_ST_READY)
2413 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2414 fp = fc_frame_alloc(lport,
2415 sizeof(struct fc_ct_hdr) +
2416 sizeof(struct fc_ns_rspn) + len);
2419 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2420 NULL, NULL, lport->e_d_tov);