This source file includes following definitions.
- fcoe_interface_setup
- fcoe_interface_create
- fcoe_interface_remove
- fcoe_interface_cleanup
- fcoe_fip_recv
- fcoe_fip_vlan_recv
- fcoe_port_send
- fcoe_fip_send
- fcoe_update_src_mac
- fcoe_get_src_mac
- fcoe_lport_config
- fcoe_netdev_features_change
- fcoe_netdev_config
- fcoe_shost_config
- fcoe_fdmi_info
- fcoe_oem_match
- fcoe_em_config
- fcoe_if_destroy
- fcoe_ddp_setup
- fcoe_ddp_target
- fcoe_ddp_done
- fcoe_if_create
- fcoe_if_init
- fcoe_if_exit
- fcoe_thread_cleanup_local
- fcoe_select_cpu
- fcoe_rcv
- fcoe_alloc_paged_crc_eof
- fcoe_xmit
- fcoe_filter_frames
- fcoe_recv_frame
- fcoe_receive_work
- fcoe_dev_setup
- fcoe_dev_cleanup
- fcoe_hostlist_lookup_realdev_port
- fcoe_dcb_app_notification
- fcoe_device_notification
- fcoe_disable
- fcoe_enable
- fcoe_ctlr_enabled
- fcoe_ctlr_mode
- fcoe_destroy
- fcoe_destroy_work
- fcoe_match
- fcoe_dcb_create
- _fcoe_create
- fcoe_create
- fcoe_ctlr_alloc
- fcoe_link_ok
- fcoe_percpu_clean
- fcoe_reset
- fcoe_hostlist_lookup_port
- fcoe_hostlist_lookup
- fcoe_hostlist_add
- fcoe_hostlist_del
- fcoe_init
- fcoe_exit
- fcoe_flogi_resp
- fcoe_logo_resp
- fcoe_elsct_send
- fcoe_vport_create
- fcoe_vport_destroy
- fcoe_vport_remove
- fcoe_vport_disable
- fcoe_set_vport_symbolic_name
- fcoe_fcf_get_vlan_id
- fcoe_set_port_id
1
2
3
4
5
6
7
8 #include <linux/module.h>
9 #include <linux/spinlock.h>
10 #include <linux/netdevice.h>
11 #include <linux/etherdevice.h>
12 #include <linux/ethtool.h>
13 #include <linux/if_ether.h>
14 #include <linux/if_vlan.h>
15 #include <linux/crc32.h>
16 #include <linux/slab.h>
17 #include <linux/cpu.h>
18 #include <linux/fs.h>
19 #include <linux/sysfs.h>
20 #include <linux/ctype.h>
21 #include <linux/workqueue.h>
22 #include <net/dcbnl.h>
23 #include <net/dcbevent.h>
24 #include <scsi/scsi_tcq.h>
25 #include <scsi/scsicam.h>
26 #include <scsi/scsi_transport.h>
27 #include <scsi/scsi_transport_fc.h>
28 #include <net/rtnetlink.h>
29
30 #include <scsi/fc/fc_encaps.h>
31 #include <scsi/fc/fc_fip.h>
32 #include <scsi/fc/fc_fcoe.h>
33
34 #include <scsi/libfc.h>
35 #include <scsi/fc_frame.h>
36 #include <scsi/libfcoe.h>
37
38 #include "fcoe.h"
39
40 MODULE_AUTHOR("Open-FCoE.org");
41 MODULE_DESCRIPTION("FCoE");
42 MODULE_LICENSE("GPL v2");
43
44
45 static unsigned int fcoe_ddp_min = 4096;
46 module_param_named(ddp_min, fcoe_ddp_min, uint, S_IRUGO | S_IWUSR);
47 MODULE_PARM_DESC(ddp_min, "Minimum I/O size in bytes for " \
48 "Direct Data Placement (DDP).");
49
50 unsigned int fcoe_debug_logging;
51 module_param_named(debug_logging, fcoe_debug_logging, int, S_IRUGO|S_IWUSR);
52 MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels");
53
54 static unsigned int fcoe_e_d_tov = 2 * 1000;
55 module_param_named(e_d_tov, fcoe_e_d_tov, int, S_IRUGO|S_IWUSR);
56 MODULE_PARM_DESC(e_d_tov, "E_D_TOV in ms, default 2000");
57
58 static unsigned int fcoe_r_a_tov = 2 * 2 * 1000;
59 module_param_named(r_a_tov, fcoe_r_a_tov, int, S_IRUGO|S_IWUSR);
60 MODULE_PARM_DESC(r_a_tov, "R_A_TOV in ms, default 4000");
61
62 static DEFINE_MUTEX(fcoe_config_mutex);
63
64 static struct workqueue_struct *fcoe_wq;
65
66
67
68 static LIST_HEAD(fcoe_hostlist);
69 static DEFINE_PER_CPU(struct fcoe_percpu_s, fcoe_percpu);
70
71
72 static int fcoe_reset(struct Scsi_Host *);
73 static int fcoe_xmit(struct fc_lport *, struct fc_frame *);
74 static int fcoe_rcv(struct sk_buff *, struct net_device *,
75 struct packet_type *, struct net_device *);
76 static void fcoe_percpu_clean(struct fc_lport *);
77 static int fcoe_link_ok(struct fc_lport *);
78
79 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *);
80 static int fcoe_hostlist_add(const struct fc_lport *);
81 static void fcoe_hostlist_del(const struct fc_lport *);
82
83 static int fcoe_device_notification(struct notifier_block *, ulong, void *);
84 static void fcoe_dev_setup(void);
85 static void fcoe_dev_cleanup(void);
86 static struct fcoe_interface
87 *fcoe_hostlist_lookup_port(const struct net_device *);
88
89 static int fcoe_fip_recv(struct sk_buff *, struct net_device *,
90 struct packet_type *, struct net_device *);
91 static int fcoe_fip_vlan_recv(struct sk_buff *, struct net_device *,
92 struct packet_type *, struct net_device *);
93
94 static void fcoe_fip_send(struct fcoe_ctlr *, struct sk_buff *);
95 static void fcoe_update_src_mac(struct fc_lport *, u8 *);
96 static u8 *fcoe_get_src_mac(struct fc_lport *);
97 static void fcoe_destroy_work(struct work_struct *);
98
99 static int fcoe_ddp_setup(struct fc_lport *, u16, struct scatterlist *,
100 unsigned int);
101 static int fcoe_ddp_done(struct fc_lport *, u16);
102 static int fcoe_ddp_target(struct fc_lport *, u16, struct scatterlist *,
103 unsigned int);
104 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
105 ulong event, void *ptr);
106
107 static bool fcoe_match(struct net_device *netdev);
108 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode);
109 static int fcoe_destroy(struct net_device *netdev);
110 static int fcoe_enable(struct net_device *netdev);
111 static int fcoe_disable(struct net_device *netdev);
112
113
114 static int fcoe_ctlr_alloc(struct net_device *netdev);
115 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev);
116 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev);
117
118 static struct fc_seq *fcoe_elsct_send(struct fc_lport *,
119 u32 did, struct fc_frame *,
120 unsigned int op,
121 void (*resp)(struct fc_seq *,
122 struct fc_frame *,
123 void *),
124 void *, u32 timeout);
125 static void fcoe_recv_frame(struct sk_buff *skb);
126
127
128 static struct notifier_block fcoe_notifier = {
129 .notifier_call = fcoe_device_notification,
130 };
131
132
133 static struct notifier_block dcb_notifier = {
134 .notifier_call = fcoe_dcb_app_notification,
135 };
136
137 static struct scsi_transport_template *fcoe_nport_scsi_transport;
138 static struct scsi_transport_template *fcoe_vport_scsi_transport;
139
140 static int fcoe_vport_destroy(struct fc_vport *);
141 static int fcoe_vport_create(struct fc_vport *, bool disabled);
142 static int fcoe_vport_disable(struct fc_vport *, bool disable);
143 static void fcoe_set_vport_symbolic_name(struct fc_vport *);
144 static void fcoe_set_port_id(struct fc_lport *, u32, struct fc_frame *);
145 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *);
146 static void fcoe_vport_remove(struct fc_lport *);
147
148 static struct fcoe_sysfs_function_template fcoe_sysfs_templ = {
149 .set_fcoe_ctlr_mode = fcoe_ctlr_mode,
150 .set_fcoe_ctlr_enabled = fcoe_ctlr_enabled,
151 .get_fcoe_ctlr_link_fail = fcoe_ctlr_get_lesb,
152 .get_fcoe_ctlr_vlink_fail = fcoe_ctlr_get_lesb,
153 .get_fcoe_ctlr_miss_fka = fcoe_ctlr_get_lesb,
154 .get_fcoe_ctlr_symb_err = fcoe_ctlr_get_lesb,
155 .get_fcoe_ctlr_err_block = fcoe_ctlr_get_lesb,
156 .get_fcoe_ctlr_fcs_error = fcoe_ctlr_get_lesb,
157
158 .get_fcoe_fcf_selected = fcoe_fcf_get_selected,
159 .get_fcoe_fcf_vlan_id = fcoe_fcf_get_vlan_id,
160 };
161
162 static struct libfc_function_template fcoe_libfc_fcn_templ = {
163 .frame_send = fcoe_xmit,
164 .ddp_setup = fcoe_ddp_setup,
165 .ddp_done = fcoe_ddp_done,
166 .ddp_target = fcoe_ddp_target,
167 .elsct_send = fcoe_elsct_send,
168 .get_lesb = fcoe_get_lesb,
169 .lport_set_port_id = fcoe_set_port_id,
170 };
171
172 static struct fc_function_template fcoe_nport_fc_functions = {
173 .show_host_node_name = 1,
174 .show_host_port_name = 1,
175 .show_host_supported_classes = 1,
176 .show_host_supported_fc4s = 1,
177 .show_host_active_fc4s = 1,
178 .show_host_maxframe_size = 1,
179 .show_host_serial_number = 1,
180 .show_host_manufacturer = 1,
181 .show_host_model = 1,
182 .show_host_model_description = 1,
183 .show_host_hardware_version = 1,
184 .show_host_driver_version = 1,
185 .show_host_firmware_version = 1,
186 .show_host_optionrom_version = 1,
187
188 .show_host_port_id = 1,
189 .show_host_supported_speeds = 1,
190 .get_host_speed = fc_get_host_speed,
191 .show_host_speed = 1,
192 .show_host_port_type = 1,
193 .get_host_port_state = fc_get_host_port_state,
194 .show_host_port_state = 1,
195 .show_host_symbolic_name = 1,
196
197 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
198 .show_rport_maxframe_size = 1,
199 .show_rport_supported_classes = 1,
200
201 .show_host_fabric_name = 1,
202 .show_starget_node_name = 1,
203 .show_starget_port_name = 1,
204 .show_starget_port_id = 1,
205 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
206 .show_rport_dev_loss_tmo = 1,
207 .get_fc_host_stats = fc_get_host_stats,
208 .issue_fc_host_lip = fcoe_reset,
209
210 .terminate_rport_io = fc_rport_terminate_io,
211
212 .vport_create = fcoe_vport_create,
213 .vport_delete = fcoe_vport_destroy,
214 .vport_disable = fcoe_vport_disable,
215 .set_vport_symbolic_name = fcoe_set_vport_symbolic_name,
216
217 .bsg_request = fc_lport_bsg_request,
218 };
219
220 static struct fc_function_template fcoe_vport_fc_functions = {
221 .show_host_node_name = 1,
222 .show_host_port_name = 1,
223 .show_host_supported_classes = 1,
224 .show_host_supported_fc4s = 1,
225 .show_host_active_fc4s = 1,
226 .show_host_maxframe_size = 1,
227 .show_host_serial_number = 1,
228 .show_host_manufacturer = 1,
229 .show_host_model = 1,
230 .show_host_model_description = 1,
231 .show_host_hardware_version = 1,
232 .show_host_driver_version = 1,
233 .show_host_firmware_version = 1,
234 .show_host_optionrom_version = 1,
235
236 .show_host_port_id = 1,
237 .show_host_supported_speeds = 1,
238 .get_host_speed = fc_get_host_speed,
239 .show_host_speed = 1,
240 .show_host_port_type = 1,
241 .get_host_port_state = fc_get_host_port_state,
242 .show_host_port_state = 1,
243 .show_host_symbolic_name = 1,
244
245 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
246 .show_rport_maxframe_size = 1,
247 .show_rport_supported_classes = 1,
248
249 .show_host_fabric_name = 1,
250 .show_starget_node_name = 1,
251 .show_starget_port_name = 1,
252 .show_starget_port_id = 1,
253 .set_rport_dev_loss_tmo = fc_set_rport_loss_tmo,
254 .show_rport_dev_loss_tmo = 1,
255 .get_fc_host_stats = fc_get_host_stats,
256 .issue_fc_host_lip = fcoe_reset,
257
258 .terminate_rport_io = fc_rport_terminate_io,
259
260 .bsg_request = fc_lport_bsg_request,
261 };
262
263 static struct scsi_host_template fcoe_shost_template = {
264 .module = THIS_MODULE,
265 .name = "FCoE Driver",
266 .proc_name = FCOE_NAME,
267 .queuecommand = fc_queuecommand,
268 .eh_timed_out = fc_eh_timed_out,
269 .eh_abort_handler = fc_eh_abort,
270 .eh_device_reset_handler = fc_eh_device_reset,
271 .eh_host_reset_handler = fc_eh_host_reset,
272 .slave_alloc = fc_slave_alloc,
273 .change_queue_depth = scsi_change_queue_depth,
274 .this_id = -1,
275 .cmd_per_lun = 3,
276 .can_queue = FCOE_MAX_OUTSTANDING_COMMANDS,
277 .sg_tablesize = SG_ALL,
278 .max_sectors = 0xffff,
279 .track_queue_depth = 1,
280 };
281
282
283
284
285
286
287
288
289
290 static int fcoe_interface_setup(struct fcoe_interface *fcoe,
291 struct net_device *netdev)
292 {
293 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
294 struct netdev_hw_addr *ha;
295 struct net_device *real_dev;
296 u8 flogi_maddr[ETH_ALEN];
297 const struct net_device_ops *ops;
298
299 fcoe->netdev = netdev;
300
301
302 ops = netdev->netdev_ops;
303 if (ops->ndo_fcoe_enable) {
304 if (ops->ndo_fcoe_enable(netdev))
305 FCOE_NETDEV_DBG(netdev, "Failed to enable FCoE"
306 " specific feature for LLD.\n");
307 }
308
309
310 if (netdev->priv_flags & IFF_BONDING && netdev->flags & IFF_MASTER) {
311 FCOE_NETDEV_DBG(netdev, "Bonded interfaces not supported\n");
312 return -EOPNOTSUPP;
313 }
314
315
316
317 real_dev = is_vlan_dev(netdev) ? vlan_dev_real_dev(netdev) : netdev;
318 fcoe->realdev = real_dev;
319 rcu_read_lock();
320 for_each_dev_addr(real_dev, ha) {
321 if ((ha->type == NETDEV_HW_ADDR_T_SAN) &&
322 (is_valid_ether_addr(ha->addr))) {
323 memcpy(fip->ctl_src_addr, ha->addr, ETH_ALEN);
324 fip->spma = 1;
325 break;
326 }
327 }
328 rcu_read_unlock();
329
330
331 if (!fip->spma)
332 memcpy(fip->ctl_src_addr, netdev->dev_addr, netdev->addr_len);
333
334
335
336
337
338
339 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
340 dev_uc_add(netdev, flogi_maddr);
341 if (fip->spma)
342 dev_uc_add(netdev, fip->ctl_src_addr);
343 if (fip->mode == FIP_MODE_VN2VN) {
344 dev_mc_add(netdev, FIP_ALL_VN2VN_MACS);
345 dev_mc_add(netdev, FIP_ALL_P2P_MACS);
346 } else
347 dev_mc_add(netdev, FIP_ALL_ENODE_MACS);
348
349
350
351
352
353 fcoe->fcoe_packet_type.func = fcoe_rcv;
354 fcoe->fcoe_packet_type.type = htons(ETH_P_FCOE);
355 fcoe->fcoe_packet_type.dev = netdev;
356 dev_add_pack(&fcoe->fcoe_packet_type);
357
358 fcoe->fip_packet_type.func = fcoe_fip_recv;
359 fcoe->fip_packet_type.type = htons(ETH_P_FIP);
360 fcoe->fip_packet_type.dev = netdev;
361 dev_add_pack(&fcoe->fip_packet_type);
362
363 if (netdev != real_dev) {
364 fcoe->fip_vlan_packet_type.func = fcoe_fip_vlan_recv;
365 fcoe->fip_vlan_packet_type.type = htons(ETH_P_FIP);
366 fcoe->fip_vlan_packet_type.dev = real_dev;
367 dev_add_pack(&fcoe->fip_vlan_packet_type);
368 }
369 return 0;
370 }
371
372
373
374
375
376
377
378
379 static struct fcoe_interface *fcoe_interface_create(struct net_device *netdev,
380 enum fip_mode fip_mode)
381 {
382 struct fcoe_ctlr_device *ctlr_dev;
383 struct fcoe_ctlr *ctlr;
384 struct fcoe_interface *fcoe;
385 int size;
386 int err;
387
388 if (!try_module_get(THIS_MODULE)) {
389 FCOE_NETDEV_DBG(netdev,
390 "Could not get a reference to the module\n");
391 fcoe = ERR_PTR(-EBUSY);
392 goto out;
393 }
394
395 size = sizeof(struct fcoe_ctlr) + sizeof(struct fcoe_interface);
396 ctlr_dev = fcoe_ctlr_device_add(&netdev->dev, &fcoe_sysfs_templ,
397 size);
398 if (!ctlr_dev) {
399 FCOE_DBG("Failed to add fcoe_ctlr_device\n");
400 fcoe = ERR_PTR(-ENOMEM);
401 goto out_putmod;
402 }
403
404 ctlr = fcoe_ctlr_device_priv(ctlr_dev);
405 ctlr->cdev = ctlr_dev;
406 fcoe = fcoe_ctlr_priv(ctlr);
407
408 dev_hold(netdev);
409
410
411
412
413 fcoe_ctlr_init(ctlr, fip_mode);
414 ctlr->send = fcoe_fip_send;
415 ctlr->update_mac = fcoe_update_src_mac;
416 ctlr->get_src_addr = fcoe_get_src_mac;
417
418 err = fcoe_interface_setup(fcoe, netdev);
419 if (err) {
420 fcoe_ctlr_destroy(ctlr);
421 fcoe_ctlr_device_delete(ctlr_dev);
422 dev_put(netdev);
423 fcoe = ERR_PTR(err);
424 goto out_putmod;
425 }
426
427 goto out;
428
429 out_putmod:
430 module_put(THIS_MODULE);
431 out:
432 return fcoe;
433 }
434
435
436
437
438
439
440
441 static void fcoe_interface_remove(struct fcoe_interface *fcoe)
442 {
443 struct net_device *netdev = fcoe->netdev;
444 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
445 u8 flogi_maddr[ETH_ALEN];
446 const struct net_device_ops *ops;
447
448
449
450
451
452
453
454 __dev_remove_pack(&fcoe->fcoe_packet_type);
455 __dev_remove_pack(&fcoe->fip_packet_type);
456 if (netdev != fcoe->realdev)
457 __dev_remove_pack(&fcoe->fip_vlan_packet_type);
458 synchronize_net();
459
460
461 memcpy(flogi_maddr, (u8[6]) FC_FCOE_FLOGI_MAC, ETH_ALEN);
462 dev_uc_del(netdev, flogi_maddr);
463 if (fip->spma)
464 dev_uc_del(netdev, fip->ctl_src_addr);
465 if (fip->mode == FIP_MODE_VN2VN) {
466 dev_mc_del(netdev, FIP_ALL_VN2VN_MACS);
467 dev_mc_del(netdev, FIP_ALL_P2P_MACS);
468 } else
469 dev_mc_del(netdev, FIP_ALL_ENODE_MACS);
470
471
472 ops = netdev->netdev_ops;
473 if (ops->ndo_fcoe_disable) {
474 if (ops->ndo_fcoe_disable(netdev))
475 FCOE_NETDEV_DBG(netdev, "Failed to disable FCoE"
476 " specific feature for LLD.\n");
477 }
478 fcoe->removed = 1;
479 }
480
481
482
483
484
485
486 static void fcoe_interface_cleanup(struct fcoe_interface *fcoe)
487 {
488 struct net_device *netdev = fcoe->netdev;
489 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
490
491
492
493 fcoe_ctlr_destroy(fip);
494 scsi_host_put(fip->lp->host);
495 dev_put(netdev);
496 module_put(THIS_MODULE);
497 }
498
499
500
501
502
503
504
505
506
507
508
509 static int fcoe_fip_recv(struct sk_buff *skb, struct net_device *netdev,
510 struct packet_type *ptype,
511 struct net_device *orig_dev)
512 {
513 struct fcoe_interface *fcoe;
514 struct fcoe_ctlr *ctlr;
515
516 fcoe = container_of(ptype, struct fcoe_interface, fip_packet_type);
517 ctlr = fcoe_to_ctlr(fcoe);
518 fcoe_ctlr_recv(ctlr, skb);
519 return 0;
520 }
521
522
523
524
525
526
527
528
529
530
531
532 static int fcoe_fip_vlan_recv(struct sk_buff *skb, struct net_device *netdev,
533 struct packet_type *ptype,
534 struct net_device *orig_dev)
535 {
536 struct fcoe_interface *fcoe;
537 struct fcoe_ctlr *ctlr;
538
539 fcoe = container_of(ptype, struct fcoe_interface, fip_vlan_packet_type);
540 ctlr = fcoe_to_ctlr(fcoe);
541 fcoe_ctlr_recv(ctlr, skb);
542 return 0;
543 }
544
545
546
547
548
549
550 static void fcoe_port_send(struct fcoe_port *port, struct sk_buff *skb)
551 {
552 if (port->fcoe_pending_queue.qlen)
553 fcoe_check_wait_queue(port->lport, skb);
554 else if (fcoe_start_io(skb))
555 fcoe_check_wait_queue(port->lport, skb);
556 }
557
558
559
560
561
562
563 static void fcoe_fip_send(struct fcoe_ctlr *fip, struct sk_buff *skb)
564 {
565 struct fcoe_interface *fcoe = fcoe_from_ctlr(fip);
566 struct fip_frame {
567 struct ethhdr eth;
568 struct fip_header fip;
569 } __packed *frame;
570
571
572
573
574 frame = (struct fip_frame *)skb->data;
575 if (ntohs(frame->eth.h_proto) == ETH_P_FIP &&
576 ntohs(frame->fip.fip_op) == FIP_OP_VLAN &&
577 fcoe->realdev != fcoe->netdev)
578 skb->dev = fcoe->realdev;
579 else
580 skb->dev = fcoe->netdev;
581 fcoe_port_send(lport_priv(fip->lp), skb);
582 }
583
584
585
586
587
588
589
590
591
592 static void fcoe_update_src_mac(struct fc_lport *lport, u8 *addr)
593 {
594 struct fcoe_port *port = lport_priv(lport);
595 struct fcoe_interface *fcoe = port->priv;
596
597 if (!is_zero_ether_addr(port->data_src_addr))
598 dev_uc_del(fcoe->netdev, port->data_src_addr);
599 if (!is_zero_ether_addr(addr))
600 dev_uc_add(fcoe->netdev, addr);
601 memcpy(port->data_src_addr, addr, ETH_ALEN);
602 }
603
604
605
606
607
608 static u8 *fcoe_get_src_mac(struct fc_lport *lport)
609 {
610 struct fcoe_port *port = lport_priv(lport);
611
612 return port->data_src_addr;
613 }
614
615
616
617
618
619
620
621 static int fcoe_lport_config(struct fc_lport *lport)
622 {
623 lport->link_up = 0;
624 lport->qfull = 0;
625 lport->max_retry_count = 3;
626 lport->max_rport_retry_count = 3;
627 lport->e_d_tov = fcoe_e_d_tov;
628 lport->r_a_tov = fcoe_r_a_tov;
629 lport->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
630 FCP_SPPF_RETRY | FCP_SPPF_CONF_COMPL);
631 lport->does_npiv = 1;
632
633 fc_lport_init_stats(lport);
634
635
636 fc_lport_config(lport);
637
638
639 lport->crc_offload = 0;
640 lport->seq_offload = 0;
641 lport->lro_enabled = 0;
642 lport->lro_xid = 0;
643 lport->lso_max = 0;
644
645 return 0;
646 }
647
648
649
650
651
652 static void fcoe_netdev_features_change(struct fc_lport *lport,
653 struct net_device *netdev)
654 {
655 mutex_lock(&lport->lp_mutex);
656
657 if (netdev->features & NETIF_F_SG)
658 lport->sg_supp = 1;
659 else
660 lport->sg_supp = 0;
661
662 if (netdev->features & NETIF_F_FCOE_CRC) {
663 lport->crc_offload = 1;
664 FCOE_NETDEV_DBG(netdev, "Supports FCCRC offload\n");
665 } else {
666 lport->crc_offload = 0;
667 }
668
669 if (netdev->features & NETIF_F_FSO) {
670 lport->seq_offload = 1;
671 lport->lso_max = netdev->gso_max_size;
672 FCOE_NETDEV_DBG(netdev, "Supports LSO for max len 0x%x\n",
673 lport->lso_max);
674 } else {
675 lport->seq_offload = 0;
676 lport->lso_max = 0;
677 }
678
679 if (netdev->fcoe_ddp_xid) {
680 lport->lro_enabled = 1;
681 lport->lro_xid = netdev->fcoe_ddp_xid;
682 FCOE_NETDEV_DBG(netdev, "Supports LRO for max xid 0x%x\n",
683 lport->lro_xid);
684 } else {
685 lport->lro_enabled = 0;
686 lport->lro_xid = 0;
687 }
688
689 mutex_unlock(&lport->lp_mutex);
690 }
691
692
693
694
695
696
697
698
699
700
701 static int fcoe_netdev_config(struct fc_lport *lport, struct net_device *netdev)
702 {
703 u32 mfs;
704 u64 wwnn, wwpn;
705 struct fcoe_interface *fcoe;
706 struct fcoe_ctlr *ctlr;
707 struct fcoe_port *port;
708
709
710 port = lport_priv(lport);
711 fcoe = port->priv;
712 ctlr = fcoe_to_ctlr(fcoe);
713
714
715 if (is_vlan_dev(netdev))
716 lport->vlan = vlan_dev_vlan_id(netdev);
717 else
718 lport->vlan = 0;
719
720
721
722
723
724
725 mfs = netdev->mtu;
726 if (netdev->features & NETIF_F_FCOE_MTU) {
727 mfs = FCOE_MTU;
728 FCOE_NETDEV_DBG(netdev, "Supports FCOE_MTU of %d bytes\n", mfs);
729 }
730 mfs -= (sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof));
731 if (fc_set_mfs(lport, mfs))
732 return -EINVAL;
733
734
735 fcoe_netdev_features_change(lport, netdev);
736
737 skb_queue_head_init(&port->fcoe_pending_queue);
738 port->fcoe_pending_queue_active = 0;
739 timer_setup(&port->timer, fcoe_queue_timer, 0);
740
741 fcoe_link_speed_update(lport);
742
743 if (!lport->vport) {
744 if (fcoe_get_wwn(netdev, &wwnn, NETDEV_FCOE_WWNN))
745 wwnn = fcoe_wwn_from_mac(ctlr->ctl_src_addr, 1, 0);
746 fc_set_wwnn(lport, wwnn);
747 if (fcoe_get_wwn(netdev, &wwpn, NETDEV_FCOE_WWPN))
748 wwpn = fcoe_wwn_from_mac(ctlr->ctl_src_addr,
749 2, 0);
750 fc_set_wwpn(lport, wwpn);
751 }
752
753 return 0;
754 }
755
756
757
758
759
760
761
762
763
764
765 static int fcoe_shost_config(struct fc_lport *lport, struct device *dev)
766 {
767 int rc = 0;
768
769
770 lport->host->max_lun = FCOE_MAX_LUN;
771 lport->host->max_id = FCOE_MAX_FCP_TARGET;
772 lport->host->max_channel = 0;
773 lport->host->max_cmd_len = FCOE_MAX_CMD_LEN;
774
775 if (lport->vport)
776 lport->host->transportt = fcoe_vport_scsi_transport;
777 else
778 lport->host->transportt = fcoe_nport_scsi_transport;
779
780
781 rc = scsi_add_host(lport->host, dev);
782 if (rc) {
783 FCOE_NETDEV_DBG(fcoe_netdev(lport), "fcoe_shost_config: "
784 "error on scsi_add_host\n");
785 return rc;
786 }
787
788 if (!lport->vport)
789 fc_host_max_npiv_vports(lport->host) = USHRT_MAX;
790
791 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
792 "%s v%s over %s", FCOE_NAME, FCOE_VERSION,
793 fcoe_netdev(lport)->name);
794
795 return 0;
796 }
797
798
799
800
801
802
803
804
805
806
807 static void fcoe_fdmi_info(struct fc_lport *lport, struct net_device *netdev)
808 {
809 struct fcoe_interface *fcoe;
810 struct fcoe_port *port;
811 struct net_device *realdev;
812 int rc;
813
814 port = lport_priv(lport);
815 fcoe = port->priv;
816 realdev = fcoe->realdev;
817
818
819 if (lport->vport)
820 return;
821
822 if (realdev->netdev_ops->ndo_fcoe_get_hbainfo) {
823 struct netdev_fcoe_hbainfo *fdmi;
824 fdmi = kzalloc(sizeof(*fdmi), GFP_KERNEL);
825 if (!fdmi)
826 return;
827
828 rc = realdev->netdev_ops->ndo_fcoe_get_hbainfo(realdev,
829 fdmi);
830 if (rc) {
831 printk(KERN_INFO "fcoe: Failed to retrieve FDMI "
832 "information from netdev.\n");
833 return;
834 }
835
836 snprintf(fc_host_serial_number(lport->host),
837 FC_SERIAL_NUMBER_SIZE,
838 "%s",
839 fdmi->serial_number);
840 snprintf(fc_host_manufacturer(lport->host),
841 FC_SERIAL_NUMBER_SIZE,
842 "%s",
843 fdmi->manufacturer);
844 snprintf(fc_host_model(lport->host),
845 FC_SYMBOLIC_NAME_SIZE,
846 "%s",
847 fdmi->model);
848 snprintf(fc_host_model_description(lport->host),
849 FC_SYMBOLIC_NAME_SIZE,
850 "%s",
851 fdmi->model_description);
852 snprintf(fc_host_hardware_version(lport->host),
853 FC_VERSION_STRING_SIZE,
854 "%s",
855 fdmi->hardware_version);
856 snprintf(fc_host_driver_version(lport->host),
857 FC_VERSION_STRING_SIZE,
858 "%s",
859 fdmi->driver_version);
860 snprintf(fc_host_optionrom_version(lport->host),
861 FC_VERSION_STRING_SIZE,
862 "%s",
863 fdmi->optionrom_version);
864 snprintf(fc_host_firmware_version(lport->host),
865 FC_VERSION_STRING_SIZE,
866 "%s",
867 fdmi->firmware_version);
868
869
870 lport->fdmi_enabled = 1;
871 kfree(fdmi);
872 } else {
873 lport->fdmi_enabled = 0;
874 printk(KERN_INFO "fcoe: No FDMI support.\n");
875 }
876 }
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896 static bool fcoe_oem_match(struct fc_frame *fp)
897 {
898 struct fc_frame_header *fh = fc_frame_header_get(fp);
899 struct fcp_cmnd *fcp;
900
901 if (fc_fcp_is_read(fr_fsp(fp)) &&
902 (fr_fsp(fp)->data_len > fcoe_ddp_min))
903 return true;
904 else if ((fr_fsp(fp) == NULL) &&
905 (fh->fh_r_ctl == FC_RCTL_DD_UNSOL_CMD) &&
906 (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)) {
907 fcp = fc_frame_payload_get(fp, sizeof(*fcp));
908 if ((fcp->fc_flags & FCP_CFL_WRDATA) &&
909 (ntohl(fcp->fc_dl) > fcoe_ddp_min))
910 return true;
911 }
912 return false;
913 }
914
915
916
917
918
919
920
921 static inline int fcoe_em_config(struct fc_lport *lport)
922 {
923 struct fcoe_port *port = lport_priv(lport);
924 struct fcoe_interface *fcoe = port->priv;
925 struct fcoe_interface *oldfcoe = NULL;
926 struct net_device *old_real_dev, *cur_real_dev;
927 u16 min_xid = FCOE_MIN_XID;
928 u16 max_xid = FCOE_MAX_XID;
929
930
931
932
933
934 if (!lport->lro_enabled || !lport->lro_xid ||
935 (lport->lro_xid >= max_xid)) {
936 lport->lro_xid = 0;
937 goto skip_oem;
938 }
939
940
941
942
943
944 if (is_vlan_dev(fcoe->netdev))
945 cur_real_dev = vlan_dev_real_dev(fcoe->netdev);
946 else
947 cur_real_dev = fcoe->netdev;
948
949 list_for_each_entry(oldfcoe, &fcoe_hostlist, list) {
950 if (is_vlan_dev(oldfcoe->netdev))
951 old_real_dev = vlan_dev_real_dev(oldfcoe->netdev);
952 else
953 old_real_dev = oldfcoe->netdev;
954
955 if (cur_real_dev == old_real_dev) {
956 fcoe->oem = oldfcoe->oem;
957 break;
958 }
959 }
960
961 if (fcoe->oem) {
962 if (!fc_exch_mgr_add(lport, fcoe->oem, fcoe_oem_match)) {
963 printk(KERN_ERR "fcoe_em_config: failed to add "
964 "offload em:%p on interface:%s\n",
965 fcoe->oem, fcoe->netdev->name);
966 return -ENOMEM;
967 }
968 } else {
969 fcoe->oem = fc_exch_mgr_alloc(lport, FC_CLASS_3,
970 FCOE_MIN_XID, lport->lro_xid,
971 fcoe_oem_match);
972 if (!fcoe->oem) {
973 printk(KERN_ERR "fcoe_em_config: failed to allocate "
974 "em for offload exches on interface:%s\n",
975 fcoe->netdev->name);
976 return -ENOMEM;
977 }
978 }
979
980
981
982
983 min_xid += lport->lro_xid + 1;
984
985 skip_oem:
986 if (!fc_exch_mgr_alloc(lport, FC_CLASS_3, min_xid, max_xid, NULL)) {
987 printk(KERN_ERR "fcoe_em_config: failed to "
988 "allocate em on interface %s\n", fcoe->netdev->name);
989 return -ENOMEM;
990 }
991
992 return 0;
993 }
994
995
996
997
998
999
1000
1001
1002 static void fcoe_if_destroy(struct fc_lport *lport)
1003 {
1004 struct fcoe_port *port = lport_priv(lport);
1005 struct fcoe_interface *fcoe = port->priv;
1006 struct net_device *netdev = fcoe->netdev;
1007
1008 FCOE_NETDEV_DBG(netdev, "Destroying interface\n");
1009
1010
1011 fc_fabric_logoff(lport);
1012
1013
1014 fc_lport_destroy(lport);
1015
1016
1017 del_timer_sync(&port->timer);
1018
1019
1020 fcoe_clean_pending_queue(lport);
1021
1022 if (!is_zero_ether_addr(port->data_src_addr))
1023 dev_uc_del(netdev, port->data_src_addr);
1024 if (lport->vport)
1025 synchronize_net();
1026 else
1027 fcoe_interface_remove(fcoe);
1028
1029
1030 fcoe_percpu_clean(lport);
1031
1032
1033 fc_remove_host(lport->host);
1034 scsi_remove_host(lport->host);
1035
1036
1037 fc_fcp_destroy(lport);
1038
1039
1040 fc_exch_mgr_free(lport);
1041
1042
1043 fc_lport_free_stats(lport);
1044
1045
1046
1047
1048
1049 if (lport->vport)
1050 scsi_host_put(lport->host);
1051 }
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062 static int fcoe_ddp_setup(struct fc_lport *lport, u16 xid,
1063 struct scatterlist *sgl, unsigned int sgc)
1064 {
1065 struct net_device *netdev = fcoe_netdev(lport);
1066
1067 if (netdev->netdev_ops->ndo_fcoe_ddp_setup)
1068 return netdev->netdev_ops->ndo_fcoe_ddp_setup(netdev,
1069 xid, sgl,
1070 sgc);
1071
1072 return 0;
1073 }
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084 static int fcoe_ddp_target(struct fc_lport *lport, u16 xid,
1085 struct scatterlist *sgl, unsigned int sgc)
1086 {
1087 struct net_device *netdev = fcoe_netdev(lport);
1088
1089 if (netdev->netdev_ops->ndo_fcoe_ddp_target)
1090 return netdev->netdev_ops->ndo_fcoe_ddp_target(netdev, xid,
1091 sgl, sgc);
1092
1093 return 0;
1094 }
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104 static int fcoe_ddp_done(struct fc_lport *lport, u16 xid)
1105 {
1106 struct net_device *netdev = fcoe_netdev(lport);
1107
1108 if (netdev->netdev_ops->ndo_fcoe_ddp_done)
1109 return netdev->netdev_ops->ndo_fcoe_ddp_done(netdev, xid);
1110 return 0;
1111 }
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123 static struct fc_lport *fcoe_if_create(struct fcoe_interface *fcoe,
1124 struct device *parent, int npiv)
1125 {
1126 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1127 struct net_device *netdev = fcoe->netdev;
1128 struct fc_lport *lport, *n_port;
1129 struct fcoe_port *port;
1130 struct Scsi_Host *shost;
1131 int rc;
1132
1133
1134
1135
1136 struct fc_vport *vport = dev_to_vport(parent);
1137
1138 FCOE_NETDEV_DBG(netdev, "Create Interface\n");
1139
1140 if (!npiv)
1141 lport = libfc_host_alloc(&fcoe_shost_template, sizeof(*port));
1142 else
1143 lport = libfc_vport_create(vport, sizeof(*port));
1144
1145 if (!lport) {
1146 FCOE_NETDEV_DBG(netdev, "Could not allocate host structure\n");
1147 rc = -ENOMEM;
1148 goto out;
1149 }
1150 port = lport_priv(lport);
1151 port->lport = lport;
1152 port->priv = fcoe;
1153 port->get_netdev = fcoe_netdev;
1154 port->max_queue_depth = FCOE_MAX_QUEUE_DEPTH;
1155 port->min_queue_depth = FCOE_MIN_QUEUE_DEPTH;
1156 INIT_WORK(&port->destroy_work, fcoe_destroy_work);
1157
1158
1159
1160
1161
1162 fcoe_hostlist_add(lport);
1163
1164
1165 rc = fcoe_lport_config(lport);
1166 if (rc) {
1167 FCOE_NETDEV_DBG(netdev, "Could not configure lport for the "
1168 "interface\n");
1169 goto out_host_put;
1170 }
1171
1172 if (npiv) {
1173 FCOE_NETDEV_DBG(netdev, "Setting vport names, "
1174 "%16.16llx %16.16llx\n",
1175 vport->node_name, vport->port_name);
1176 fc_set_wwnn(lport, vport->node_name);
1177 fc_set_wwpn(lport, vport->port_name);
1178 }
1179
1180
1181 rc = fcoe_netdev_config(lport, netdev);
1182 if (rc) {
1183 FCOE_NETDEV_DBG(netdev, "Could not configure netdev for the "
1184 "interface\n");
1185 goto out_lp_destroy;
1186 }
1187
1188
1189 rc = fcoe_shost_config(lport, parent);
1190 if (rc) {
1191 FCOE_NETDEV_DBG(netdev, "Could not configure shost for the "
1192 "interface\n");
1193 goto out_lp_destroy;
1194 }
1195
1196
1197 rc = fcoe_libfc_config(lport, ctlr, &fcoe_libfc_fcn_templ, 1);
1198 if (rc) {
1199 FCOE_NETDEV_DBG(netdev, "Could not configure libfc for the "
1200 "interface\n");
1201 goto out_lp_destroy;
1202 }
1203
1204
1205 fcoe_fdmi_info(lport, netdev);
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216 if (!npiv)
1217
1218 rc = fcoe_em_config(lport);
1219 else {
1220 shost = vport_to_shost(vport);
1221 n_port = shost_priv(shost);
1222 rc = fc_exch_mgr_list_clone(n_port, lport);
1223 }
1224
1225 if (rc) {
1226 FCOE_NETDEV_DBG(netdev, "Could not configure the EM\n");
1227 goto out_lp_destroy;
1228 }
1229
1230 return lport;
1231
1232 out_lp_destroy:
1233 fc_exch_mgr_free(lport);
1234 out_host_put:
1235 fcoe_hostlist_del(lport);
1236 scsi_host_put(lport->host);
1237 out:
1238 return ERR_PTR(rc);
1239 }
1240
1241
1242
1243
1244
1245
1246
1247
1248 static int __init fcoe_if_init(void)
1249 {
1250
1251 fcoe_nport_scsi_transport =
1252 fc_attach_transport(&fcoe_nport_fc_functions);
1253 if (!fcoe_nport_scsi_transport)
1254 goto err;
1255
1256 fcoe_vport_scsi_transport =
1257 fc_attach_transport(&fcoe_vport_fc_functions);
1258 if (!fcoe_vport_scsi_transport)
1259 goto err_vport;
1260
1261 return 0;
1262
1263 err_vport:
1264 fc_release_transport(fcoe_nport_scsi_transport);
1265 err:
1266 printk(KERN_ERR "fcoe: Failed to attach to the FC transport\n");
1267 return -ENODEV;
1268 }
1269
1270
1271
1272
1273
1274
1275
1276
1277 static int __exit fcoe_if_exit(void)
1278 {
1279 fc_release_transport(fcoe_nport_scsi_transport);
1280 fc_release_transport(fcoe_vport_scsi_transport);
1281 fcoe_nport_scsi_transport = NULL;
1282 fcoe_vport_scsi_transport = NULL;
1283 return 0;
1284 }
1285
1286 static void fcoe_thread_cleanup_local(unsigned int cpu)
1287 {
1288 struct page *crc_eof;
1289 struct fcoe_percpu_s *p;
1290
1291 p = per_cpu_ptr(&fcoe_percpu, cpu);
1292 spin_lock_bh(&p->fcoe_rx_list.lock);
1293 crc_eof = p->crc_eof_page;
1294 p->crc_eof_page = NULL;
1295 p->crc_eof_offset = 0;
1296 spin_unlock_bh(&p->fcoe_rx_list.lock);
1297
1298 if (crc_eof)
1299 put_page(crc_eof);
1300 flush_work(&p->work);
1301 }
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312 static inline unsigned int fcoe_select_cpu(void)
1313 {
1314 static unsigned int selected_cpu;
1315
1316 selected_cpu = cpumask_next(selected_cpu, cpu_online_mask);
1317 if (selected_cpu >= nr_cpu_ids)
1318 selected_cpu = cpumask_first(cpu_online_mask);
1319
1320 return selected_cpu;
1321 }
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335 static int fcoe_rcv(struct sk_buff *skb, struct net_device *netdev,
1336 struct packet_type *ptype, struct net_device *olddev)
1337 {
1338 struct fc_lport *lport;
1339 struct fcoe_rcv_info *fr;
1340 struct fcoe_ctlr *ctlr;
1341 struct fcoe_interface *fcoe;
1342 struct fc_frame_header *fh;
1343 struct fcoe_percpu_s *fps;
1344 struct ethhdr *eh;
1345 unsigned int cpu;
1346
1347 fcoe = container_of(ptype, struct fcoe_interface, fcoe_packet_type);
1348 ctlr = fcoe_to_ctlr(fcoe);
1349 lport = ctlr->lp;
1350 if (unlikely(!lport)) {
1351 FCOE_NETDEV_DBG(netdev, "Cannot find hba structure\n");
1352 goto err2;
1353 }
1354 if (!lport->link_up)
1355 goto err2;
1356
1357 FCOE_NETDEV_DBG(netdev,
1358 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1359 skb->len, skb->data_len, skb->head, skb->data,
1360 skb_tail_pointer(skb), skb_end_pointer(skb),
1361 skb->csum, skb->dev ? skb->dev->name : "<NULL>");
1362
1363
1364 skb = skb_share_check(skb, GFP_ATOMIC);
1365
1366 if (skb == NULL)
1367 return NET_RX_DROP;
1368
1369 eh = eth_hdr(skb);
1370
1371 if (is_fip_mode(ctlr) &&
1372 !ether_addr_equal(eh->h_source, ctlr->dest_addr)) {
1373 FCOE_NETDEV_DBG(netdev, "wrong source mac address:%pM\n",
1374 eh->h_source);
1375 goto err;
1376 }
1377
1378
1379
1380
1381
1382 if (unlikely((skb->len < FCOE_MIN_FRAME) ||
1383 !pskb_may_pull(skb, FCOE_HEADER_LEN)))
1384 goto err;
1385
1386 skb_set_transport_header(skb, sizeof(struct fcoe_hdr));
1387 fh = (struct fc_frame_header *) skb_transport_header(skb);
1388
1389 if (ntoh24(&eh->h_dest[3]) != ntoh24(fh->fh_d_id)) {
1390 FCOE_NETDEV_DBG(netdev, "FC frame d_id mismatch with MAC:%pM\n",
1391 eh->h_dest);
1392 goto err;
1393 }
1394
1395 fr = fcoe_dev_from_skb(skb);
1396 fr->fr_dev = lport;
1397
1398
1399
1400
1401
1402
1403
1404
1405 if (ntoh24(fh->fh_f_ctl) & FC_FC_EX_CTX)
1406 cpu = ntohs(fh->fh_ox_id) & fc_cpu_mask;
1407 else {
1408 if (ntohs(fh->fh_rx_id) == FC_XID_UNKNOWN)
1409 cpu = fcoe_select_cpu();
1410 else
1411 cpu = ntohs(fh->fh_rx_id) & fc_cpu_mask;
1412 }
1413
1414 if (cpu >= nr_cpu_ids)
1415 goto err;
1416
1417 fps = &per_cpu(fcoe_percpu, cpu);
1418 spin_lock(&fps->fcoe_rx_list.lock);
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432 __skb_queue_tail(&fps->fcoe_rx_list, skb);
1433 schedule_work_on(cpu, &fps->work);
1434 spin_unlock(&fps->fcoe_rx_list.lock);
1435
1436 return NET_RX_SUCCESS;
1437 err:
1438 per_cpu_ptr(lport->stats, get_cpu())->ErrorFrames++;
1439 put_cpu();
1440 err2:
1441 kfree_skb(skb);
1442 return NET_RX_DROP;
1443 }
1444
1445
1446
1447
1448
1449
1450
1451
1452 static int fcoe_alloc_paged_crc_eof(struct sk_buff *skb, int tlen)
1453 {
1454 struct fcoe_percpu_s *fps;
1455 int rc;
1456
1457 fps = &get_cpu_var(fcoe_percpu);
1458 rc = fcoe_get_paged_crc_eof(skb, tlen, fps);
1459 put_cpu_var(fcoe_percpu);
1460
1461 return rc;
1462 }
1463
1464
1465
1466
1467
1468
1469
1470
1471 static int fcoe_xmit(struct fc_lport *lport, struct fc_frame *fp)
1472 {
1473 int wlen;
1474 u32 crc;
1475 struct ethhdr *eh;
1476 struct fcoe_crc_eof *cp;
1477 struct sk_buff *skb;
1478 struct fc_stats *stats;
1479 struct fc_frame_header *fh;
1480 unsigned int hlen;
1481 unsigned int tlen;
1482 unsigned int elen;
1483 struct fcoe_port *port = lport_priv(lport);
1484 struct fcoe_interface *fcoe = port->priv;
1485 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
1486 u8 sof, eof;
1487 struct fcoe_hdr *hp;
1488
1489 WARN_ON((fr_len(fp) % sizeof(u32)) != 0);
1490
1491 fh = fc_frame_header_get(fp);
1492 skb = fp_skb(fp);
1493 wlen = skb->len / FCOE_WORD_TO_BYTE;
1494
1495 if (!lport->link_up) {
1496 kfree_skb(skb);
1497 return 0;
1498 }
1499
1500 if (unlikely(fh->fh_type == FC_TYPE_ELS) &&
1501 fcoe_ctlr_els_send(ctlr, lport, skb))
1502 return 0;
1503
1504 sof = fr_sof(fp);
1505 eof = fr_eof(fp);
1506
1507 elen = sizeof(struct ethhdr);
1508 hlen = sizeof(struct fcoe_hdr);
1509 tlen = sizeof(struct fcoe_crc_eof);
1510 wlen = (skb->len - tlen + sizeof(crc)) / FCOE_WORD_TO_BYTE;
1511
1512
1513 if (likely(lport->crc_offload)) {
1514 skb->ip_summed = CHECKSUM_PARTIAL;
1515 skb->csum_start = skb_headroom(skb);
1516 skb->csum_offset = skb->len;
1517 crc = 0;
1518 } else {
1519 skb->ip_summed = CHECKSUM_NONE;
1520 crc = fcoe_fc_crc(fp);
1521 }
1522
1523
1524 if (skb_is_nonlinear(skb)) {
1525 skb_frag_t *frag;
1526 if (fcoe_alloc_paged_crc_eof(skb, tlen)) {
1527 kfree_skb(skb);
1528 return -ENOMEM;
1529 }
1530 frag = &skb_shinfo(skb)->frags[skb_shinfo(skb)->nr_frags - 1];
1531 cp = kmap_atomic(skb_frag_page(frag)) + skb_frag_off(frag);
1532 } else {
1533 cp = skb_put(skb, tlen);
1534 }
1535
1536 memset(cp, 0, sizeof(*cp));
1537 cp->fcoe_eof = eof;
1538 cp->fcoe_crc32 = cpu_to_le32(~crc);
1539
1540 if (skb_is_nonlinear(skb)) {
1541 kunmap_atomic(cp);
1542 cp = NULL;
1543 }
1544
1545
1546 skb_push(skb, elen + hlen);
1547 skb_reset_mac_header(skb);
1548 skb_reset_network_header(skb);
1549 skb->mac_len = elen;
1550 skb->protocol = htons(ETH_P_FCOE);
1551 skb->priority = fcoe->priority;
1552
1553 if (is_vlan_dev(fcoe->netdev) &&
1554 fcoe->realdev->features & NETIF_F_HW_VLAN_CTAG_TX) {
1555
1556 skb->dev = fcoe->realdev;
1557 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
1558 vlan_dev_vlan_id(fcoe->netdev));
1559 } else
1560 skb->dev = fcoe->netdev;
1561
1562
1563 eh = eth_hdr(skb);
1564 eh->h_proto = htons(ETH_P_FCOE);
1565 memcpy(eh->h_dest, ctlr->dest_addr, ETH_ALEN);
1566 if (ctlr->map_dest)
1567 memcpy(eh->h_dest + 3, fh->fh_d_id, 3);
1568
1569 if (unlikely(ctlr->flogi_oxid != FC_XID_UNKNOWN))
1570 memcpy(eh->h_source, ctlr->ctl_src_addr, ETH_ALEN);
1571 else
1572 memcpy(eh->h_source, port->data_src_addr, ETH_ALEN);
1573
1574 hp = (struct fcoe_hdr *)(eh + 1);
1575 memset(hp, 0, sizeof(*hp));
1576 if (FC_FCOE_VER)
1577 FC_FCOE_ENCAPS_VER(hp, FC_FCOE_VER);
1578 hp->fcoe_sof = sof;
1579
1580
1581 if (lport->seq_offload && fr_max_payload(fp)) {
1582 skb_shinfo(skb)->gso_type = SKB_GSO_FCOE;
1583 skb_shinfo(skb)->gso_size = fr_max_payload(fp);
1584 } else {
1585 skb_shinfo(skb)->gso_type = 0;
1586 skb_shinfo(skb)->gso_size = 0;
1587 }
1588
1589 stats = per_cpu_ptr(lport->stats, get_cpu());
1590 stats->TxFrames++;
1591 stats->TxWords += wlen;
1592 put_cpu();
1593
1594
1595 fr_dev(fp) = lport;
1596 fcoe_port_send(port, skb);
1597 return 0;
1598 }
1599
1600
1601
1602
1603
1604
1605
1606
1607 static inline int fcoe_filter_frames(struct fc_lport *lport,
1608 struct fc_frame *fp)
1609 {
1610 struct fcoe_ctlr *ctlr;
1611 struct fcoe_interface *fcoe;
1612 struct fc_frame_header *fh;
1613 struct sk_buff *skb = (struct sk_buff *)fp;
1614 struct fc_stats *stats;
1615
1616
1617
1618
1619
1620
1621 if (lport->crc_offload && skb->ip_summed == CHECKSUM_UNNECESSARY)
1622 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1623 else
1624 fr_flags(fp) |= FCPHF_CRC_UNCHECKED;
1625
1626 fh = fc_frame_header_get(fp);
1627 if (fh->fh_r_ctl == FC_RCTL_DD_SOL_DATA && fh->fh_type == FC_TYPE_FCP)
1628 return 0;
1629
1630 fcoe = ((struct fcoe_port *)lport_priv(lport))->priv;
1631 ctlr = fcoe_to_ctlr(fcoe);
1632 if (is_fip_mode(ctlr) && fc_frame_payload_op(fp) == ELS_LOGO &&
1633 ntoh24(fh->fh_s_id) == FC_FID_FLOGI) {
1634 FCOE_DBG("fcoe: dropping FCoE lport LOGO in fip mode\n");
1635 return -EINVAL;
1636 }
1637
1638 if (!(fr_flags(fp) & FCPHF_CRC_UNCHECKED) ||
1639 le32_to_cpu(fr_crc(fp)) == ~crc32(~0, skb->data, skb->len)) {
1640 fr_flags(fp) &= ~FCPHF_CRC_UNCHECKED;
1641 return 0;
1642 }
1643
1644 stats = per_cpu_ptr(lport->stats, get_cpu());
1645 stats->InvalidCRCCount++;
1646 if (stats->InvalidCRCCount < 5)
1647 printk(KERN_WARNING "fcoe: dropping frame with CRC error\n");
1648 put_cpu();
1649 return -EINVAL;
1650 }
1651
1652
1653
1654
1655
1656 static void fcoe_recv_frame(struct sk_buff *skb)
1657 {
1658 u32 fr_len;
1659 struct fc_lport *lport;
1660 struct fcoe_rcv_info *fr;
1661 struct fc_stats *stats;
1662 struct fcoe_crc_eof crc_eof;
1663 struct fc_frame *fp;
1664 struct fcoe_hdr *hp;
1665
1666 fr = fcoe_dev_from_skb(skb);
1667 lport = fr->fr_dev;
1668 if (unlikely(!lport)) {
1669 FCOE_NETDEV_DBG(skb->dev, "NULL lport in skb\n");
1670 kfree_skb(skb);
1671 return;
1672 }
1673
1674 FCOE_NETDEV_DBG(skb->dev,
1675 "skb_info: len:%d data_len:%d head:%p data:%p tail:%p end:%p sum:%d dev:%s\n",
1676 skb->len, skb->data_len,
1677 skb->head, skb->data, skb_tail_pointer(skb),
1678 skb_end_pointer(skb), skb->csum,
1679 skb->dev ? skb->dev->name : "<NULL>");
1680
1681 skb_linearize(skb);
1682
1683
1684
1685
1686
1687 hp = (struct fcoe_hdr *) skb_network_header(skb);
1688
1689 stats = per_cpu_ptr(lport->stats, get_cpu());
1690 if (unlikely(FC_FCOE_DECAPS_VER(hp) != FC_FCOE_VER)) {
1691 if (stats->ErrorFrames < 5)
1692 printk(KERN_WARNING "fcoe: FCoE version "
1693 "mismatch: The frame has "
1694 "version %x, but the "
1695 "initiator supports version "
1696 "%x\n", FC_FCOE_DECAPS_VER(hp),
1697 FC_FCOE_VER);
1698 goto drop;
1699 }
1700
1701 skb_pull(skb, sizeof(struct fcoe_hdr));
1702 fr_len = skb->len - sizeof(struct fcoe_crc_eof);
1703
1704 stats->RxFrames++;
1705 stats->RxWords += fr_len / FCOE_WORD_TO_BYTE;
1706
1707 fp = (struct fc_frame *)skb;
1708 fc_frame_init(fp);
1709 fr_dev(fp) = lport;
1710 fr_sof(fp) = hp->fcoe_sof;
1711
1712
1713 if (skb_copy_bits(skb, fr_len, &crc_eof, sizeof(crc_eof)))
1714 goto drop;
1715 fr_eof(fp) = crc_eof.fcoe_eof;
1716 fr_crc(fp) = crc_eof.fcoe_crc32;
1717 if (pskb_trim(skb, fr_len))
1718 goto drop;
1719
1720 if (!fcoe_filter_frames(lport, fp)) {
1721 put_cpu();
1722 fc_exch_recv(lport, fp);
1723 return;
1724 }
1725 drop:
1726 stats->ErrorFrames++;
1727 put_cpu();
1728 kfree_skb(skb);
1729 }
1730
1731
1732
1733
1734
1735
1736 static void fcoe_receive_work(struct work_struct *work)
1737 {
1738 struct fcoe_percpu_s *p;
1739 struct sk_buff *skb;
1740 struct sk_buff_head tmp;
1741
1742 p = container_of(work, struct fcoe_percpu_s, work);
1743 skb_queue_head_init(&tmp);
1744
1745 spin_lock_bh(&p->fcoe_rx_list.lock);
1746 skb_queue_splice_init(&p->fcoe_rx_list, &tmp);
1747 spin_unlock_bh(&p->fcoe_rx_list.lock);
1748
1749 if (!skb_queue_len(&tmp))
1750 return;
1751
1752 while ((skb = __skb_dequeue(&tmp)))
1753 fcoe_recv_frame(skb);
1754 }
1755
1756
1757
1758
1759 static void fcoe_dev_setup(void)
1760 {
1761 register_dcbevent_notifier(&dcb_notifier);
1762 register_netdevice_notifier(&fcoe_notifier);
1763 }
1764
1765
1766
1767
1768 static void fcoe_dev_cleanup(void)
1769 {
1770 unregister_dcbevent_notifier(&dcb_notifier);
1771 unregister_netdevice_notifier(&fcoe_notifier);
1772 }
1773
1774 static struct fcoe_interface *
1775 fcoe_hostlist_lookup_realdev_port(struct net_device *netdev)
1776 {
1777 struct fcoe_interface *fcoe;
1778 struct net_device *real_dev;
1779
1780 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1781 if (is_vlan_dev(fcoe->netdev))
1782 real_dev = vlan_dev_real_dev(fcoe->netdev);
1783 else
1784 real_dev = fcoe->netdev;
1785
1786 if (netdev == real_dev)
1787 return fcoe;
1788 }
1789 return NULL;
1790 }
1791
1792 static int fcoe_dcb_app_notification(struct notifier_block *notifier,
1793 ulong event, void *ptr)
1794 {
1795 struct dcb_app_type *entry = ptr;
1796 struct fcoe_ctlr *ctlr;
1797 struct fcoe_interface *fcoe;
1798 struct net_device *netdev;
1799 int prio;
1800
1801 if (entry->app.selector != DCB_APP_IDTYPE_ETHTYPE)
1802 return NOTIFY_OK;
1803
1804 netdev = dev_get_by_index(&init_net, entry->ifindex);
1805 if (!netdev)
1806 return NOTIFY_OK;
1807
1808 fcoe = fcoe_hostlist_lookup_realdev_port(netdev);
1809 dev_put(netdev);
1810 if (!fcoe)
1811 return NOTIFY_OK;
1812
1813 ctlr = fcoe_to_ctlr(fcoe);
1814
1815 if (entry->dcbx & DCB_CAP_DCBX_VER_CEE)
1816 prio = ffs(entry->app.priority) - 1;
1817 else
1818 prio = entry->app.priority;
1819
1820 if (prio < 0)
1821 return NOTIFY_OK;
1822
1823 if (entry->app.protocol == ETH_P_FIP ||
1824 entry->app.protocol == ETH_P_FCOE)
1825 ctlr->priority = prio;
1826
1827 if (entry->app.protocol == ETH_P_FCOE)
1828 fcoe->priority = prio;
1829
1830 return NOTIFY_OK;
1831 }
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843 static int fcoe_device_notification(struct notifier_block *notifier,
1844 ulong event, void *ptr)
1845 {
1846 struct fcoe_ctlr_device *cdev;
1847 struct fc_lport *lport = NULL;
1848 struct net_device *netdev = netdev_notifier_info_to_dev(ptr);
1849 struct fcoe_ctlr *ctlr;
1850 struct fcoe_interface *fcoe;
1851 struct fc_stats *stats;
1852 u32 link_possible = 1;
1853 u32 mfs;
1854 int rc = NOTIFY_OK;
1855
1856 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
1857 if (fcoe->netdev == netdev) {
1858 ctlr = fcoe_to_ctlr(fcoe);
1859 lport = ctlr->lp;
1860 break;
1861 }
1862 }
1863 if (!lport) {
1864 rc = NOTIFY_DONE;
1865 goto out;
1866 }
1867
1868 switch (event) {
1869 case NETDEV_DOWN:
1870 case NETDEV_GOING_DOWN:
1871 link_possible = 0;
1872 break;
1873 case NETDEV_UP:
1874 case NETDEV_CHANGE:
1875 break;
1876 case NETDEV_CHANGEMTU:
1877 if (netdev->features & NETIF_F_FCOE_MTU)
1878 break;
1879 mfs = netdev->mtu - (sizeof(struct fcoe_hdr) +
1880 sizeof(struct fcoe_crc_eof));
1881 if (mfs >= FC_MIN_MAX_FRAME)
1882 fc_set_mfs(lport, mfs);
1883 break;
1884 case NETDEV_REGISTER:
1885 break;
1886 case NETDEV_UNREGISTER:
1887 list_del(&fcoe->list);
1888 fcoe_vport_remove(lport);
1889 mutex_lock(&fcoe_config_mutex);
1890 fcoe_if_destroy(lport);
1891 if (!fcoe->removed)
1892 fcoe_interface_remove(fcoe);
1893 fcoe_interface_cleanup(fcoe);
1894 mutex_unlock(&fcoe_config_mutex);
1895 fcoe_ctlr_device_delete(fcoe_ctlr_to_ctlr_dev(ctlr));
1896 goto out;
1897 break;
1898 case NETDEV_FEAT_CHANGE:
1899 fcoe_netdev_features_change(lport, netdev);
1900 break;
1901 default:
1902 FCOE_NETDEV_DBG(netdev, "Unknown event %ld "
1903 "from netdev netlink\n", event);
1904 }
1905
1906 fcoe_link_speed_update(lport);
1907
1908 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
1909
1910 if (link_possible && !fcoe_link_ok(lport)) {
1911 switch (cdev->enabled) {
1912 case FCOE_CTLR_DISABLED:
1913 pr_info("Link up while interface is disabled.\n");
1914 break;
1915 case FCOE_CTLR_ENABLED:
1916 case FCOE_CTLR_UNUSED:
1917 fcoe_ctlr_link_up(ctlr);
1918 };
1919 } else if (fcoe_ctlr_link_down(ctlr)) {
1920 switch (cdev->enabled) {
1921 case FCOE_CTLR_DISABLED:
1922 pr_info("Link down while interface is disabled.\n");
1923 break;
1924 case FCOE_CTLR_ENABLED:
1925 case FCOE_CTLR_UNUSED:
1926 stats = per_cpu_ptr(lport->stats, get_cpu());
1927 stats->LinkFailureCount++;
1928 put_cpu();
1929 fcoe_clean_pending_queue(lport);
1930 };
1931 }
1932 out:
1933 return rc;
1934 }
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946 static int fcoe_disable(struct net_device *netdev)
1947 {
1948 struct fcoe_ctlr *ctlr;
1949 struct fcoe_interface *fcoe;
1950 int rc = 0;
1951
1952 mutex_lock(&fcoe_config_mutex);
1953
1954 rtnl_lock();
1955 fcoe = fcoe_hostlist_lookup_port(netdev);
1956 rtnl_unlock();
1957
1958 if (fcoe) {
1959 ctlr = fcoe_to_ctlr(fcoe);
1960 fcoe_ctlr_link_down(ctlr);
1961 fcoe_clean_pending_queue(ctlr->lp);
1962 } else
1963 rc = -ENODEV;
1964
1965 mutex_unlock(&fcoe_config_mutex);
1966 return rc;
1967 }
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977 static int fcoe_enable(struct net_device *netdev)
1978 {
1979 struct fcoe_ctlr *ctlr;
1980 struct fcoe_interface *fcoe;
1981 int rc = 0;
1982
1983 mutex_lock(&fcoe_config_mutex);
1984 rtnl_lock();
1985 fcoe = fcoe_hostlist_lookup_port(netdev);
1986 rtnl_unlock();
1987
1988 if (!fcoe) {
1989 rc = -ENODEV;
1990 goto out;
1991 }
1992
1993 ctlr = fcoe_to_ctlr(fcoe);
1994
1995 if (!fcoe_link_ok(ctlr->lp))
1996 fcoe_ctlr_link_up(ctlr);
1997
1998 out:
1999 mutex_unlock(&fcoe_config_mutex);
2000 return rc;
2001 }
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013 static int fcoe_ctlr_enabled(struct fcoe_ctlr_device *cdev)
2014 {
2015 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(cdev);
2016 struct fc_lport *lport = ctlr->lp;
2017 struct net_device *netdev = fcoe_netdev(lport);
2018
2019 switch (cdev->enabled) {
2020 case FCOE_CTLR_ENABLED:
2021 return fcoe_enable(netdev);
2022 case FCOE_CTLR_DISABLED:
2023 return fcoe_disable(netdev);
2024 case FCOE_CTLR_UNUSED:
2025 default:
2026 return -ENOTSUPP;
2027 };
2028 }
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038 static void fcoe_ctlr_mode(struct fcoe_ctlr_device *ctlr_dev)
2039 {
2040 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2041 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2042
2043 if (ctlr_dev->mode == FIP_CONN_TYPE_VN2VN &&
2044 ctlr->mode != FIP_MODE_VN2VN) {
2045 dev_mc_del(fcoe->netdev, FIP_ALL_ENODE_MACS);
2046 dev_mc_add(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2047 dev_mc_add(fcoe->netdev, FIP_ALL_P2P_MACS);
2048 } else if (ctlr->mode != FIP_MODE_FABRIC) {
2049 dev_mc_del(fcoe->netdev, FIP_ALL_VN2VN_MACS);
2050 dev_mc_del(fcoe->netdev, FIP_ALL_P2P_MACS);
2051 dev_mc_add(fcoe->netdev, FIP_ALL_ENODE_MACS);
2052 }
2053 fcoe_ctlr_set_fip_mode(ctlr_dev);
2054 }
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064 static int fcoe_destroy(struct net_device *netdev)
2065 {
2066 struct fcoe_ctlr *ctlr;
2067 struct fcoe_interface *fcoe;
2068 struct fc_lport *lport;
2069 struct fcoe_port *port;
2070 int rc = 0;
2071
2072 mutex_lock(&fcoe_config_mutex);
2073 rtnl_lock();
2074 fcoe = fcoe_hostlist_lookup_port(netdev);
2075 if (!fcoe) {
2076 rc = -ENODEV;
2077 goto out_nodev;
2078 }
2079 ctlr = fcoe_to_ctlr(fcoe);
2080 lport = ctlr->lp;
2081 port = lport_priv(lport);
2082 list_del(&fcoe->list);
2083 queue_work(fcoe_wq, &port->destroy_work);
2084 out_nodev:
2085 rtnl_unlock();
2086 mutex_unlock(&fcoe_config_mutex);
2087 return rc;
2088 }
2089
2090
2091
2092
2093
2094 static void fcoe_destroy_work(struct work_struct *work)
2095 {
2096 struct fcoe_ctlr_device *cdev;
2097 struct fcoe_ctlr *ctlr;
2098 struct fcoe_port *port;
2099 struct fcoe_interface *fcoe;
2100
2101 port = container_of(work, struct fcoe_port, destroy_work);
2102
2103 fcoe_vport_remove(port->lport);
2104
2105 mutex_lock(&fcoe_config_mutex);
2106
2107 fcoe = port->priv;
2108 ctlr = fcoe_to_ctlr(fcoe);
2109 cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2110
2111 rtnl_lock();
2112 fcoe_if_destroy(port->lport);
2113 if (!fcoe->removed)
2114 fcoe_interface_remove(fcoe);
2115 rtnl_unlock();
2116 fcoe_interface_cleanup(fcoe);
2117
2118 mutex_unlock(&fcoe_config_mutex);
2119
2120 fcoe_ctlr_device_delete(cdev);
2121 }
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132 static bool fcoe_match(struct net_device *netdev)
2133 {
2134 return true;
2135 }
2136
2137
2138
2139
2140
2141
2142
2143 static void fcoe_dcb_create(struct fcoe_interface *fcoe)
2144 {
2145 int ctlr_prio = TC_PRIO_BESTEFFORT;
2146 int fcoe_prio = TC_PRIO_INTERACTIVE;
2147 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2148 #ifdef CONFIG_DCB
2149 int dcbx;
2150 u8 fup, up;
2151 struct net_device *netdev = fcoe->realdev;
2152 struct dcb_app app = {
2153 .priority = 0,
2154 .protocol = ETH_P_FCOE
2155 };
2156
2157
2158 if (netdev && netdev->dcbnl_ops && netdev->dcbnl_ops->getdcbx) {
2159 dcbx = netdev->dcbnl_ops->getdcbx(netdev);
2160
2161 if (dcbx & DCB_CAP_DCBX_VER_IEEE) {
2162 app.selector = IEEE_8021QAZ_APP_SEL_ETHERTYPE;
2163 up = dcb_ieee_getapp_mask(netdev, &app);
2164 app.protocol = ETH_P_FIP;
2165 fup = dcb_ieee_getapp_mask(netdev, &app);
2166 } else {
2167 app.selector = DCB_APP_IDTYPE_ETHTYPE;
2168 up = dcb_getapp(netdev, &app);
2169 app.protocol = ETH_P_FIP;
2170 fup = dcb_getapp(netdev, &app);
2171 }
2172
2173 fcoe_prio = ffs(up) ? ffs(up) - 1 : 0;
2174 ctlr_prio = ffs(fup) ? ffs(fup) - 1 : fcoe_prio;
2175 }
2176 #endif
2177 fcoe->priority = fcoe_prio;
2178 ctlr->priority = ctlr_prio;
2179 }
2180
2181 enum fcoe_create_link_state {
2182 FCOE_CREATE_LINK_DOWN,
2183 FCOE_CREATE_LINK_UP,
2184 };
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199 static int _fcoe_create(struct net_device *netdev, enum fip_mode fip_mode,
2200 enum fcoe_create_link_state link_state)
2201 {
2202 int rc = 0;
2203 struct fcoe_ctlr_device *ctlr_dev;
2204 struct fcoe_ctlr *ctlr;
2205 struct fcoe_interface *fcoe;
2206 struct fc_lport *lport;
2207
2208 mutex_lock(&fcoe_config_mutex);
2209 rtnl_lock();
2210
2211
2212 if (fcoe_hostlist_lookup(netdev)) {
2213 rc = -EEXIST;
2214 goto out_nodev;
2215 }
2216
2217 fcoe = fcoe_interface_create(netdev, fip_mode);
2218 if (IS_ERR(fcoe)) {
2219 rc = PTR_ERR(fcoe);
2220 goto out_nodev;
2221 }
2222
2223 ctlr = fcoe_to_ctlr(fcoe);
2224 ctlr_dev = fcoe_ctlr_to_ctlr_dev(ctlr);
2225 lport = fcoe_if_create(fcoe, &ctlr_dev->dev, 0);
2226 if (IS_ERR(lport)) {
2227 printk(KERN_ERR "fcoe: Failed to create interface (%s)\n",
2228 netdev->name);
2229 rc = -EIO;
2230 if (!fcoe->removed)
2231 fcoe_interface_remove(fcoe);
2232 rtnl_unlock();
2233 fcoe_interface_cleanup(fcoe);
2234 mutex_unlock(&fcoe_config_mutex);
2235 fcoe_ctlr_device_delete(ctlr_dev);
2236 return rc;
2237 }
2238
2239
2240 ctlr->lp = lport;
2241
2242
2243 fcoe_dcb_create(fcoe);
2244
2245
2246 lport->boot_time = jiffies;
2247 fc_fabric_login(lport);
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261 if (link_state == FCOE_CREATE_LINK_UP)
2262 ctlr_dev->enabled = FCOE_CTLR_ENABLED;
2263 else
2264 ctlr_dev->enabled = FCOE_CTLR_DISABLED;
2265
2266 if (link_state == FCOE_CREATE_LINK_UP &&
2267 !fcoe_link_ok(lport)) {
2268 rtnl_unlock();
2269 fcoe_ctlr_link_up(ctlr);
2270 mutex_unlock(&fcoe_config_mutex);
2271 return rc;
2272 }
2273
2274 out_nodev:
2275 rtnl_unlock();
2276 mutex_unlock(&fcoe_config_mutex);
2277
2278 return rc;
2279 }
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290 static int fcoe_create(struct net_device *netdev, enum fip_mode fip_mode)
2291 {
2292 return _fcoe_create(netdev, fip_mode, FCOE_CREATE_LINK_UP);
2293 }
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306 static int fcoe_ctlr_alloc(struct net_device *netdev)
2307 {
2308 return _fcoe_create(netdev, FIP_MODE_FABRIC,
2309 FCOE_CREATE_LINK_DOWN);
2310 }
2311
2312
2313
2314
2315
2316
2317
2318
2319 static int fcoe_link_ok(struct fc_lport *lport)
2320 {
2321 struct net_device *netdev = fcoe_netdev(lport);
2322
2323 if (netif_oper_up(netdev))
2324 return 0;
2325 return -1;
2326 }
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338 static void fcoe_percpu_clean(struct fc_lport *lport)
2339 {
2340 struct fcoe_percpu_s *pp;
2341 unsigned int cpu;
2342
2343 for_each_possible_cpu(cpu) {
2344 pp = &per_cpu(fcoe_percpu, cpu);
2345
2346 flush_work(&pp->work);
2347 }
2348 }
2349
2350
2351
2352
2353
2354
2355
2356 static int fcoe_reset(struct Scsi_Host *shost)
2357 {
2358 struct fc_lport *lport = shost_priv(shost);
2359 struct fcoe_port *port = lport_priv(lport);
2360 struct fcoe_interface *fcoe = port->priv;
2361 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2362 struct fcoe_ctlr_device *cdev = fcoe_ctlr_to_ctlr_dev(ctlr);
2363
2364 fcoe_ctlr_link_down(ctlr);
2365 fcoe_clean_pending_queue(ctlr->lp);
2366
2367 if (cdev->enabled != FCOE_CTLR_DISABLED &&
2368 !fcoe_link_ok(ctlr->lp))
2369 fcoe_ctlr_link_up(ctlr);
2370 return 0;
2371 }
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381 static struct fcoe_interface *
2382 fcoe_hostlist_lookup_port(const struct net_device *netdev)
2383 {
2384 struct fcoe_interface *fcoe;
2385
2386 list_for_each_entry(fcoe, &fcoe_hostlist, list) {
2387 if (fcoe->netdev == netdev)
2388 return fcoe;
2389 }
2390 return NULL;
2391 }
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402 static struct fc_lport *fcoe_hostlist_lookup(const struct net_device *netdev)
2403 {
2404 struct fcoe_ctlr *ctlr;
2405 struct fcoe_interface *fcoe;
2406
2407 fcoe = fcoe_hostlist_lookup_port(netdev);
2408 ctlr = fcoe_to_ctlr(fcoe);
2409 return (fcoe) ? ctlr->lp : NULL;
2410 }
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421 static int fcoe_hostlist_add(const struct fc_lport *lport)
2422 {
2423 struct fcoe_interface *fcoe;
2424 struct fcoe_port *port;
2425
2426 fcoe = fcoe_hostlist_lookup_port(fcoe_netdev(lport));
2427 if (!fcoe) {
2428 port = lport_priv(lport);
2429 fcoe = port->priv;
2430 list_add_tail(&fcoe->list, &fcoe_hostlist);
2431 }
2432 return 0;
2433 }
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443 static void fcoe_hostlist_del(const struct fc_lport *lport)
2444 {
2445 struct fcoe_interface *fcoe;
2446 struct fcoe_port *port;
2447
2448 port = lport_priv(lport);
2449 fcoe = port->priv;
2450 list_del(&fcoe->list);
2451 return;
2452 }
2453
2454 static struct fcoe_transport fcoe_sw_transport = {
2455 .name = {FCOE_TRANSPORT_DEFAULT},
2456 .attached = false,
2457 .list = LIST_HEAD_INIT(fcoe_sw_transport.list),
2458 .match = fcoe_match,
2459 .alloc = fcoe_ctlr_alloc,
2460 .create = fcoe_create,
2461 .destroy = fcoe_destroy,
2462 .enable = fcoe_enable,
2463 .disable = fcoe_disable,
2464 };
2465
2466
2467
2468
2469
2470
2471 static int __init fcoe_init(void)
2472 {
2473 struct fcoe_percpu_s *p;
2474 unsigned int cpu;
2475 int rc = 0;
2476
2477 fcoe_wq = alloc_workqueue("fcoe", 0, 0);
2478 if (!fcoe_wq)
2479 return -ENOMEM;
2480
2481
2482 rc = fcoe_transport_attach(&fcoe_sw_transport);
2483 if (rc) {
2484 printk(KERN_ERR "failed to register an fcoe transport, check "
2485 "if libfcoe is loaded\n");
2486 goto out_destroy;
2487 }
2488
2489 mutex_lock(&fcoe_config_mutex);
2490
2491 for_each_possible_cpu(cpu) {
2492 p = per_cpu_ptr(&fcoe_percpu, cpu);
2493 INIT_WORK(&p->work, fcoe_receive_work);
2494 skb_queue_head_init(&p->fcoe_rx_list);
2495 }
2496
2497
2498 fcoe_dev_setup();
2499
2500 rc = fcoe_if_init();
2501 if (rc)
2502 goto out_free;
2503
2504 mutex_unlock(&fcoe_config_mutex);
2505 return 0;
2506
2507 out_free:
2508 mutex_unlock(&fcoe_config_mutex);
2509 out_destroy:
2510 destroy_workqueue(fcoe_wq);
2511 return rc;
2512 }
2513 module_init(fcoe_init);
2514
2515
2516
2517
2518
2519
2520 static void __exit fcoe_exit(void)
2521 {
2522 struct fcoe_interface *fcoe, *tmp;
2523 struct fcoe_ctlr *ctlr;
2524 struct fcoe_port *port;
2525 unsigned int cpu;
2526
2527 mutex_lock(&fcoe_config_mutex);
2528
2529 fcoe_dev_cleanup();
2530
2531
2532 rtnl_lock();
2533 list_for_each_entry_safe(fcoe, tmp, &fcoe_hostlist, list) {
2534 ctlr = fcoe_to_ctlr(fcoe);
2535 port = lport_priv(ctlr->lp);
2536 fcoe_hostlist_del(port->lport);
2537 queue_work(fcoe_wq, &port->destroy_work);
2538 }
2539 rtnl_unlock();
2540
2541 for_each_possible_cpu(cpu)
2542 fcoe_thread_cleanup_local(cpu);
2543
2544 mutex_unlock(&fcoe_config_mutex);
2545
2546
2547
2548
2549
2550 destroy_workqueue(fcoe_wq);
2551
2552
2553
2554
2555
2556
2557 fcoe_if_exit();
2558
2559
2560 fcoe_transport_detach(&fcoe_sw_transport);
2561 }
2562 module_exit(fcoe_exit);
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573 static void fcoe_flogi_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2574 {
2575 struct fcoe_ctlr *fip = arg;
2576 struct fc_exch *exch = fc_seq_exch(seq);
2577 struct fc_lport *lport = exch->lp;
2578 u8 *mac;
2579
2580 if (IS_ERR(fp))
2581 goto done;
2582
2583 mac = fr_cb(fp)->granted_mac;
2584
2585 if (is_zero_ether_addr(mac))
2586 fcoe_ctlr_recv_flogi(fip, lport, fp);
2587 if (!is_zero_ether_addr(mac))
2588 fcoe_update_src_mac(lport, mac);
2589 done:
2590 fc_lport_flogi_resp(seq, fp, lport);
2591 }
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602 static void fcoe_logo_resp(struct fc_seq *seq, struct fc_frame *fp, void *arg)
2603 {
2604 struct fc_lport *lport = arg;
2605 static u8 zero_mac[ETH_ALEN] = { 0 };
2606
2607 if (!IS_ERR(fp))
2608 fcoe_update_src_mac(lport, zero_mac);
2609 fc_lport_logo_resp(seq, fp, lport);
2610 }
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621 static struct fc_seq *fcoe_elsct_send(struct fc_lport *lport, u32 did,
2622 struct fc_frame *fp, unsigned int op,
2623 void (*resp)(struct fc_seq *,
2624 struct fc_frame *,
2625 void *),
2626 void *arg, u32 timeout)
2627 {
2628 struct fcoe_port *port = lport_priv(lport);
2629 struct fcoe_interface *fcoe = port->priv;
2630 struct fcoe_ctlr *fip = fcoe_to_ctlr(fcoe);
2631 struct fc_frame_header *fh = fc_frame_header_get(fp);
2632
2633 switch (op) {
2634 case ELS_FLOGI:
2635 case ELS_FDISC:
2636 if (lport->point_to_multipoint)
2637 break;
2638 return fc_elsct_send(lport, did, fp, op, fcoe_flogi_resp,
2639 fip, timeout);
2640 case ELS_LOGO:
2641
2642 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
2643 break;
2644 return fc_elsct_send(lport, did, fp, op, fcoe_logo_resp,
2645 lport, timeout);
2646 }
2647 return fc_elsct_send(lport, did, fp, op, resp, arg, timeout);
2648 }
2649
2650
2651
2652
2653
2654
2655
2656
2657 static int fcoe_vport_create(struct fc_vport *vport, bool disabled)
2658 {
2659 struct Scsi_Host *shost = vport_to_shost(vport);
2660 struct fc_lport *n_port = shost_priv(shost);
2661 struct fcoe_port *port = lport_priv(n_port);
2662 struct fcoe_interface *fcoe = port->priv;
2663 struct net_device *netdev = fcoe->netdev;
2664 struct fc_lport *vn_port;
2665 int rc;
2666 char buf[32];
2667
2668 rc = fcoe_validate_vport_create(vport);
2669 if (rc) {
2670 fcoe_wwn_to_str(vport->port_name, buf, sizeof(buf));
2671 printk(KERN_ERR "fcoe: Failed to create vport, "
2672 "WWPN (0x%s) already exists\n",
2673 buf);
2674 return rc;
2675 }
2676
2677 mutex_lock(&fcoe_config_mutex);
2678 rtnl_lock();
2679 vn_port = fcoe_if_create(fcoe, &vport->dev, 1);
2680 rtnl_unlock();
2681 mutex_unlock(&fcoe_config_mutex);
2682
2683 if (IS_ERR(vn_port)) {
2684 printk(KERN_ERR "fcoe: fcoe_vport_create(%s) failed\n",
2685 netdev->name);
2686 return -EIO;
2687 }
2688
2689 if (disabled) {
2690 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2691 } else {
2692 vn_port->boot_time = jiffies;
2693 fc_fabric_login(vn_port);
2694 fc_vport_setlink(vn_port);
2695 }
2696 return 0;
2697 }
2698
2699
2700
2701
2702
2703
2704
2705 static int fcoe_vport_destroy(struct fc_vport *vport)
2706 {
2707 struct Scsi_Host *shost = vport_to_shost(vport);
2708 struct fc_lport *n_port = shost_priv(shost);
2709 struct fc_lport *vn_port = vport->dd_data;
2710
2711 mutex_lock(&n_port->lp_mutex);
2712 list_del(&vn_port->list);
2713 mutex_unlock(&n_port->lp_mutex);
2714
2715 mutex_lock(&fcoe_config_mutex);
2716 rtnl_lock();
2717 fcoe_if_destroy(vn_port);
2718 rtnl_unlock();
2719 mutex_unlock(&fcoe_config_mutex);
2720
2721 return 0;
2722 }
2723
2724
2725
2726
2727
2728 static void fcoe_vport_remove(struct fc_lport *lport)
2729 {
2730 struct Scsi_Host *shost;
2731 struct fc_host_attrs *fc_host;
2732 unsigned long flags;
2733 struct fc_vport *vport;
2734 struct fc_vport *next_vport;
2735
2736 shost = lport->host;
2737 fc_host = shost_to_fc_host(shost);
2738
2739
2740 spin_lock_irqsave(shost->host_lock, flags);
2741 list_for_each_entry_safe(vport, next_vport, &fc_host->vports, peers) {
2742 if (vport->flags & (FC_VPORT_DEL | FC_VPORT_CREATING)) {
2743 continue;
2744 } else {
2745 vport->flags |= FC_VPORT_DELETING;
2746 queue_work(fc_host_work_q(shost),
2747 &vport->vport_delete_work);
2748 }
2749 }
2750 spin_unlock_irqrestore(shost->host_lock, flags);
2751
2752 flush_workqueue(fc_host_work_q(shost));
2753 }
2754
2755
2756
2757
2758
2759
2760 static int fcoe_vport_disable(struct fc_vport *vport, bool disable)
2761 {
2762 struct fc_lport *lport = vport->dd_data;
2763
2764 if (disable) {
2765 fc_vport_set_state(vport, FC_VPORT_DISABLED);
2766 fc_fabric_logoff(lport);
2767 } else {
2768 lport->boot_time = jiffies;
2769 fc_fabric_login(lport);
2770 fc_vport_setlink(lport);
2771 }
2772
2773 return 0;
2774 }
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784 static void fcoe_set_vport_symbolic_name(struct fc_vport *vport)
2785 {
2786 struct fc_lport *lport = vport->dd_data;
2787 struct fc_frame *fp;
2788 size_t len;
2789
2790 snprintf(fc_host_symbolic_name(lport->host), FC_SYMBOLIC_NAME_SIZE,
2791 "%s v%s over %s : %s", FCOE_NAME, FCOE_VERSION,
2792 fcoe_netdev(lport)->name, vport->symbolic_name);
2793
2794 if (lport->state != LPORT_ST_READY)
2795 return;
2796
2797 len = strnlen(fc_host_symbolic_name(lport->host), 255);
2798 fp = fc_frame_alloc(lport,
2799 sizeof(struct fc_ct_hdr) +
2800 sizeof(struct fc_ns_rspn) + len);
2801 if (!fp)
2802 return;
2803 lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, FC_NS_RSPN_ID,
2804 NULL, NULL, 3 * lport->r_a_tov);
2805 }
2806
2807 static void fcoe_fcf_get_vlan_id(struct fcoe_fcf_device *fcf_dev)
2808 {
2809 struct fcoe_ctlr_device *ctlr_dev =
2810 fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2811 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2812 struct fcoe_interface *fcoe = fcoe_ctlr_priv(ctlr);
2813
2814 fcf_dev->vlan_id = vlan_dev_vlan_id(fcoe->netdev);
2815 }
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829 static void fcoe_set_port_id(struct fc_lport *lport,
2830 u32 port_id, struct fc_frame *fp)
2831 {
2832 struct fcoe_port *port = lport_priv(lport);
2833 struct fcoe_interface *fcoe = port->priv;
2834 struct fcoe_ctlr *ctlr = fcoe_to_ctlr(fcoe);
2835
2836 if (fp && fc_frame_payload_op(fp) == ELS_FLOGI)
2837 fcoe_ctlr_recv_flogi(ctlr, lport, fp);
2838 }