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PM / sleep: Asynchronous threads for suspend_noirq
[linux/fpc-iii.git] / drivers / scsi / fcoe / fcoe_ctlr.c
blob34a1b1f333b4c16881ea3f6a610f29a73fc18a56
1 /*
2 * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2009 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Maintained at www.Open-FCoE.org
19 */
20
21 #include <linux/types.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/spinlock.h>
26 #include <linux/timer.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/errno.h>
33 #include <linux/bitops.h>
34 #include <linux/slab.h>
35 #include <net/rtnetlink.h>
36
37 #include <scsi/fc/fc_els.h>
38 #include <scsi/fc/fc_fs.h>
39 #include <scsi/fc/fc_fip.h>
40 #include <scsi/fc/fc_encaps.h>
41 #include <scsi/fc/fc_fcoe.h>
42 #include <scsi/fc/fc_fcp.h>
43
44 #include <scsi/libfc.h>
45 #include <scsi/libfcoe.h>
46
47 #include "libfcoe.h"
48
49 #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
50 #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
51
52 static void fcoe_ctlr_timeout(unsigned long);
53 static void fcoe_ctlr_timer_work(struct work_struct *);
54 static void fcoe_ctlr_recv_work(struct work_struct *);
55 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
56
57 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
58 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
59 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
60 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
61
62 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
63 static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
64 static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
65 static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
66
67 static const char * const fcoe_ctlr_states[] = {
68 [FIP_ST_DISABLED] = "DISABLED",
69 [FIP_ST_LINK_WAIT] = "LINK_WAIT",
70 [FIP_ST_AUTO] = "AUTO",
71 [FIP_ST_NON_FIP] = "NON_FIP",
72 [FIP_ST_ENABLED] = "ENABLED",
73 [FIP_ST_VNMP_START] = "VNMP_START",
74 [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
75 [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
76 [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
77 [FIP_ST_VNMP_UP] = "VNMP_UP",
78 };
79
80 static const char *fcoe_ctlr_state(enum fip_state state)
81 {
82 const char *cp = "unknown";
83
84 if (state < ARRAY_SIZE(fcoe_ctlr_states))
85 cp = fcoe_ctlr_states[state];
86 if (!cp)
87 cp = "unknown";
88 return cp;
89 }
90
91 /**
92 * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
93 * @fip: The FCoE controller
94 * @state: The new state
95 */
96 static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
97 {
98 if (state == fip->state)
99 return;
100 if (fip->lp)
101 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
102 fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
103 fip->state = state;
104 }
105
106 /**
107 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
108 * @fcf: The FCF to check
109 *
110 * Return non-zero if FCF fcoe_size has been validated.
111 */
112 static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
113 {
114 return (fcf->flags & FIP_FL_SOL) != 0;
115 }
116
117 /**
118 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
119 * @fcf: The FCF to check
120 *
121 * Return non-zero if the FCF is usable.
122 */
123 static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
124 {
125 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
126
127 return (fcf->flags & flags) == flags;
128 }
129
130 /**
131 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
132 * @fip: The FCoE controller
133 */
134 static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
135 {
136 if (fip->mode == FIP_MODE_VN2VN)
137 hton24(fip->dest_addr, FIP_VN_FC_MAP);
138 else
139 hton24(fip->dest_addr, FIP_DEF_FC_MAP);
140 hton24(fip->dest_addr + 3, 0);
141 fip->map_dest = 1;
142 }
143
144 /**
145 * fcoe_ctlr_init() - Initialize the FCoE Controller instance
146 * @fip: The FCoE controller to initialize
147 */
148 void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
149 {
150 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
151 fip->mode = mode;
152 INIT_LIST_HEAD(&fip->fcfs);
153 mutex_init(&fip->ctlr_mutex);
154 spin_lock_init(&fip->ctlr_lock);
155 fip->flogi_oxid = FC_XID_UNKNOWN;
156 setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
157 INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
158 INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
159 skb_queue_head_init(&fip->fip_recv_list);
160 }
161 EXPORT_SYMBOL(fcoe_ctlr_init);
162
163 /**
164 * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
165 * @new: The newly discovered FCF
166 *
167 * Called with fip->ctlr_mutex held
168 */
169 static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new)
170 {
171 struct fcoe_ctlr *fip = new->fip;
172 struct fcoe_ctlr_device *ctlr_dev;
173 struct fcoe_fcf_device *temp, *fcf_dev;
174 int rc = -ENOMEM;
175
176 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
177 new->fabric_name, new->fcf_mac);
178
179 temp = kzalloc(sizeof(*temp), GFP_KERNEL);
180 if (!temp)
181 goto out;
182
183 temp->fabric_name = new->fabric_name;
184 temp->switch_name = new->switch_name;
185 temp->fc_map = new->fc_map;
186 temp->vfid = new->vfid;
187 memcpy(temp->mac, new->fcf_mac, ETH_ALEN);
188 temp->priority = new->pri;
189 temp->fka_period = new->fka_period;
190 temp->selected = 0; /* default to unselected */
191
192 /*
193 * If ctlr_dev doesn't exist then it means we're a libfcoe user
194 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device.
195 * fnic would be an example of a driver with this behavior. In this
196 * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we
197 * don't want to make sysfs changes.
198 */
199
200 ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
201 if (ctlr_dev) {
202 mutex_lock(&ctlr_dev->lock);
203 fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp);
204 if (unlikely(!fcf_dev)) {
205 rc = -ENOMEM;
206 mutex_unlock(&ctlr_dev->lock);
207 goto out;
208 }
209
210 /*
211 * The fcoe_sysfs layer can return a CONNECTED fcf that
212 * has a priv (fcf was never deleted) or a CONNECTED fcf
213 * that doesn't have a priv (fcf was deleted). However,
214 * libfcoe will always delete FCFs before trying to add
215 * them. This is ensured because both recv_adv and
216 * age_fcfs are protected by the the fcoe_ctlr's mutex.
217 * This means that we should never get a FCF with a
218 * non-NULL priv pointer.
219 */
220 BUG_ON(fcf_dev->priv);
221
222 fcf_dev->priv = new;
223 new->fcf_dev = fcf_dev;
224 mutex_unlock(&ctlr_dev->lock);
225 }
226
227 list_add(&new->list, &fip->fcfs);
228 fip->fcf_count++;
229 rc = 0;
230
231 out:
232 kfree(temp);
233 return rc;
234 }
235
236 /**
237 * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
238 * @new: The FCF to be removed
239 *
240 * Called with fip->ctlr_mutex held
241 */
242 static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
243 {
244 struct fcoe_ctlr *fip = new->fip;
245 struct fcoe_ctlr_device *cdev;
246 struct fcoe_fcf_device *fcf_dev;
247
248 list_del(&new->list);
249 fip->fcf_count--;
250
251 /*
252 * If ctlr_dev doesn't exist then it means we're a libfcoe user
253 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device
254 * or a fcoe_fcf_device.
255 *
256 * fnic would be an example of a driver with this behavior. In this
257 * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above),
258 * but we don't want to make sysfs changes.
259 */
260 cdev = fcoe_ctlr_to_ctlr_dev(fip);
261 if (cdev) {
262 mutex_lock(&cdev->lock);
263 fcf_dev = fcoe_fcf_to_fcf_dev(new);
264 WARN_ON(!fcf_dev);
265 new->fcf_dev = NULL;
266 fcoe_fcf_device_delete(fcf_dev);
267 kfree(new);
268 mutex_unlock(&cdev->lock);
269 }
270 }
271
272 /**
273 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
274 * @fip: The FCoE controller whose FCFs are to be reset
275 *
276 * Called with &fcoe_ctlr lock held.
277 */
278 static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
279 {
280 struct fcoe_fcf *fcf;
281 struct fcoe_fcf *next;
282
283 fip->sel_fcf = NULL;
284 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
285 fcoe_sysfs_fcf_del(fcf);
286 }
287 WARN_ON(fip->fcf_count);
288
289 fip->sel_time = 0;
290 }
291
292 /**
293 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
294 * @fip: The FCoE controller to tear down
295 *
296 * This is called by FCoE drivers before freeing the &fcoe_ctlr.
297 *
298 * The receive handler will have been deleted before this to guarantee
299 * that no more recv_work will be scheduled.
300 *
301 * The timer routine will simply return once we set FIP_ST_DISABLED.
302 * This guarantees that no further timeouts or work will be scheduled.
303 */
304 void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
305 {
306 cancel_work_sync(&fip->recv_work);
307 skb_queue_purge(&fip->fip_recv_list);
308
309 mutex_lock(&fip->ctlr_mutex);
310 fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
311 fcoe_ctlr_reset_fcfs(fip);
312 mutex_unlock(&fip->ctlr_mutex);
313 del_timer_sync(&fip->timer);
314 cancel_work_sync(&fip->timer_work);
315 }
316 EXPORT_SYMBOL(fcoe_ctlr_destroy);
317
318 /**
319 * fcoe_ctlr_announce() - announce new FCF selection
320 * @fip: The FCoE controller
321 *
322 * Also sets the destination MAC for FCoE and control packets
323 *
324 * Called with neither ctlr_mutex nor ctlr_lock held.
325 */
326 static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
327 {
328 struct fcoe_fcf *sel;
329 struct fcoe_fcf *fcf;
330
331 mutex_lock(&fip->ctlr_mutex);
332 spin_lock_bh(&fip->ctlr_lock);
333
334 kfree_skb(fip->flogi_req);
335 fip->flogi_req = NULL;
336 list_for_each_entry(fcf, &fip->fcfs, list)
337 fcf->flogi_sent = 0;
338
339 spin_unlock_bh(&fip->ctlr_lock);
340 sel = fip->sel_fcf;
341
342 if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr))
343 goto unlock;
344 if (!is_zero_ether_addr(fip->dest_addr)) {
345 printk(KERN_NOTICE "libfcoe: host%d: "
346 "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
347 fip->lp->host->host_no, fip->dest_addr);
348 memset(fip->dest_addr, 0, ETH_ALEN);
349 }
350 if (sel) {
351 printk(KERN_INFO "libfcoe: host%d: FIP selected "
352 "Fibre-Channel Forwarder MAC %pM\n",
353 fip->lp->host->host_no, sel->fcf_mac);
354 memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN);
355 fip->map_dest = 0;
356 }
357 unlock:
358 mutex_unlock(&fip->ctlr_mutex);
359 }
360
361 /**
362 * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
363 * @fip: The FCoE controller to get the maximum FCoE size from
364 *
365 * Returns the maximum packet size including the FCoE header and trailer,
366 * but not including any Ethernet or VLAN headers.
367 */
368 static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
369 {
370 /*
371 * Determine the max FCoE frame size allowed, including
372 * FCoE header and trailer.
373 * Note: lp->mfs is currently the payload size, not the frame size.
374 */
375 return fip->lp->mfs + sizeof(struct fc_frame_header) +
376 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
377 }
378
379 /**
380 * fcoe_ctlr_solicit() - Send a FIP solicitation
381 * @fip: The FCoE controller to send the solicitation on
382 * @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
383 */
384 static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
385 {
386 struct sk_buff *skb;
387 struct fip_sol {
388 struct ethhdr eth;
389 struct fip_header fip;
390 struct {
391 struct fip_mac_desc mac;
392 struct fip_wwn_desc wwnn;
393 struct fip_size_desc size;
394 } __packed desc;
395 } __packed * sol;
396 u32 fcoe_size;
397
398 skb = dev_alloc_skb(sizeof(*sol));
399 if (!skb)
400 return;
401
402 sol = (struct fip_sol *)skb->data;
403
404 memset(sol, 0, sizeof(*sol));
405 memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
406 memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
407 sol->eth.h_proto = htons(ETH_P_FIP);
408
409 sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
410 sol->fip.fip_op = htons(FIP_OP_DISC);
411 sol->fip.fip_subcode = FIP_SC_SOL;
412 sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
413 sol->fip.fip_flags = htons(FIP_FL_FPMA);
414 if (fip->spma)
415 sol->fip.fip_flags |= htons(FIP_FL_SPMA);
416
417 sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
418 sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
419 memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
420
421 sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
422 sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
423 put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
424
425 fcoe_size = fcoe_ctlr_fcoe_size(fip);
426 sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
427 sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
428 sol->desc.size.fd_size = htons(fcoe_size);
429
430 skb_put(skb, sizeof(*sol));
431 skb->protocol = htons(ETH_P_FIP);
432 skb->priority = fip->priority;
433 skb_reset_mac_header(skb);
434 skb_reset_network_header(skb);
435 fip->send(fip, skb);
436
437 if (!fcf)
438 fip->sol_time = jiffies;
439 }
440
441 /**
442 * fcoe_ctlr_link_up() - Start FCoE controller
443 * @fip: The FCoE controller to start
444 *
445 * Called from the LLD when the network link is ready.
446 */
447 void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
448 {
449 mutex_lock(&fip->ctlr_mutex);
450 if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
451 mutex_unlock(&fip->ctlr_mutex);
452 fc_linkup(fip->lp);
453 } else if (fip->state == FIP_ST_LINK_WAIT) {
454 fcoe_ctlr_set_state(fip, fip->mode);
455 switch (fip->mode) {
456 default:
457 LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
458 /* fall-through */
459 case FIP_MODE_AUTO:
460 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
461 /* fall-through */
462 case FIP_MODE_FABRIC:
463 case FIP_MODE_NON_FIP:
464 mutex_unlock(&fip->ctlr_mutex);
465 fc_linkup(fip->lp);
466 fcoe_ctlr_solicit(fip, NULL);
467 break;
468 case FIP_MODE_VN2VN:
469 fcoe_ctlr_vn_start(fip);
470 mutex_unlock(&fip->ctlr_mutex);
471 fc_linkup(fip->lp);
472 break;
473 }
474 } else
475 mutex_unlock(&fip->ctlr_mutex);
476 }
477 EXPORT_SYMBOL(fcoe_ctlr_link_up);
478
479 /**
480 * fcoe_ctlr_reset() - Reset a FCoE controller
481 * @fip: The FCoE controller to reset
482 */
483 static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
484 {
485 fcoe_ctlr_reset_fcfs(fip);
486 del_timer(&fip->timer);
487 fip->ctlr_ka_time = 0;
488 fip->port_ka_time = 0;
489 fip->sol_time = 0;
490 fip->flogi_oxid = FC_XID_UNKNOWN;
491 fcoe_ctlr_map_dest(fip);
492 }
493
494 /**
495 * fcoe_ctlr_link_down() - Stop a FCoE controller
496 * @fip: The FCoE controller to be stopped
497 *
498 * Returns non-zero if the link was up and now isn't.
499 *
500 * Called from the LLD when the network link is not ready.
501 * There may be multiple calls while the link is down.
502 */
503 int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
504 {
505 int link_dropped;
506
507 LIBFCOE_FIP_DBG(fip, "link down.\n");
508 mutex_lock(&fip->ctlr_mutex);
509 fcoe_ctlr_reset(fip);
510 link_dropped = fip->state != FIP_ST_LINK_WAIT;
511 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
512 mutex_unlock(&fip->ctlr_mutex);
513
514 if (link_dropped)
515 fc_linkdown(fip->lp);
516 return link_dropped;
517 }
518 EXPORT_SYMBOL(fcoe_ctlr_link_down);
519
520 /**
521 * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
522 * @fip: The FCoE controller to send the FKA on
523 * @lport: libfc fc_lport to send from
524 * @ports: 0 for controller keep-alive, 1 for port keep-alive
525 * @sa: The source MAC address
526 *
527 * A controller keep-alive is sent every fka_period (typically 8 seconds).
528 * The source MAC is the native MAC address.
529 *
530 * A port keep-alive is sent every 90 seconds while logged in.
531 * The source MAC is the assigned mapped source address.
532 * The destination is the FCF's F-port.
533 */
534 static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
535 struct fc_lport *lport,
536 int ports, u8 *sa)
537 {
538 struct sk_buff *skb;
539 struct fip_kal {
540 struct ethhdr eth;
541 struct fip_header fip;
542 struct fip_mac_desc mac;
543 } __packed * kal;
544 struct fip_vn_desc *vn;
545 u32 len;
546 struct fc_lport *lp;
547 struct fcoe_fcf *fcf;
548
549 fcf = fip->sel_fcf;
550 lp = fip->lp;
551 if (!fcf || (ports && !lp->port_id))
552 return;
553
554 len = sizeof(*kal) + ports * sizeof(*vn);
555 skb = dev_alloc_skb(len);
556 if (!skb)
557 return;
558
559 kal = (struct fip_kal *)skb->data;
560 memset(kal, 0, len);
561 memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
562 memcpy(kal->eth.h_source, sa, ETH_ALEN);
563 kal->eth.h_proto = htons(ETH_P_FIP);
564
565 kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
566 kal->fip.fip_op = htons(FIP_OP_CTRL);
567 kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
568 kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
569 ports * sizeof(*vn)) / FIP_BPW);
570 kal->fip.fip_flags = htons(FIP_FL_FPMA);
571 if (fip->spma)
572 kal->fip.fip_flags |= htons(FIP_FL_SPMA);
573
574 kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
575 kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
576 memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
577 if (ports) {
578 vn = (struct fip_vn_desc *)(kal + 1);
579 vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
580 vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
581 memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
582 hton24(vn->fd_fc_id, lport->port_id);
583 put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
584 }
585 skb_put(skb, len);
586 skb->protocol = htons(ETH_P_FIP);
587 skb->priority = fip->priority;
588 skb_reset_mac_header(skb);
589 skb_reset_network_header(skb);
590 fip->send(fip, skb);
591 }
592
593 /**
594 * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
595 * @fip: The FCoE controller for the ELS frame
596 * @dtype: The FIP descriptor type for the frame
597 * @skb: The FCoE ELS frame including FC header but no FCoE headers
598 * @d_id: The destination port ID.
599 *
600 * Returns non-zero error code on failure.
601 *
602 * The caller must check that the length is a multiple of 4.
603 *
604 * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
605 * Headroom includes the FIP encapsulation description, FIP header, and
606 * Ethernet header. The tailroom is for the FIP MAC descriptor.
607 */
608 static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
609 u8 dtype, struct sk_buff *skb, u32 d_id)
610 {
611 struct fip_encaps_head {
612 struct ethhdr eth;
613 struct fip_header fip;
614 struct fip_encaps encaps;
615 } __packed * cap;
616 struct fc_frame_header *fh;
617 struct fip_mac_desc *mac;
618 struct fcoe_fcf *fcf;
619 size_t dlen;
620 u16 fip_flags;
621 u8 op;
622
623 fh = (struct fc_frame_header *)skb->data;
624 op = *(u8 *)(fh + 1);
625 dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
626 cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
627 memset(cap, 0, sizeof(*cap));
628
629 if (lport->point_to_multipoint) {
630 if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest))
631 return -ENODEV;
632 fip_flags = 0;
633 } else {
634 fcf = fip->sel_fcf;
635 if (!fcf)
636 return -ENODEV;
637 fip_flags = fcf->flags;
638 fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA :
639 FIP_FL_FPMA;
640 if (!fip_flags)
641 return -ENODEV;
642 memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
643 }
644 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
645 cap->eth.h_proto = htons(ETH_P_FIP);
646
647 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
648 cap->fip.fip_op = htons(FIP_OP_LS);
649 if (op == ELS_LS_ACC || op == ELS_LS_RJT)
650 cap->fip.fip_subcode = FIP_SC_REP;
651 else
652 cap->fip.fip_subcode = FIP_SC_REQ;
653 cap->fip.fip_flags = htons(fip_flags);
654
655 cap->encaps.fd_desc.fip_dtype = dtype;
656 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
657
658 if (op != ELS_LS_RJT) {
659 dlen += sizeof(*mac);
660 mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
661 memset(mac, 0, sizeof(*mac));
662 mac->fd_desc.fip_dtype = FIP_DT_MAC;
663 mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
664 if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
665 memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
666 } else if (fip->mode == FIP_MODE_VN2VN) {
667 hton24(mac->fd_mac, FIP_VN_FC_MAP);
668 hton24(mac->fd_mac + 3, fip->port_id);
669 } else if (fip_flags & FIP_FL_SPMA) {
670 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
671 memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
672 } else {
673 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
674 /* FPMA only FLOGI. Must leave the MAC desc zeroed. */
675 }
676 }
677 cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
678
679 skb->protocol = htons(ETH_P_FIP);
680 skb->priority = fip->priority;
681 skb_reset_mac_header(skb);
682 skb_reset_network_header(skb);
683 return 0;
684 }
685
686 /**
687 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
688 * @fip: FCoE controller.
689 * @lport: libfc fc_lport to send from
690 * @skb: FCoE ELS frame including FC header but no FCoE headers.
691 *
692 * Returns a non-zero error code if the frame should not be sent.
693 * Returns zero if the caller should send the frame with FCoE encapsulation.
694 *
695 * The caller must check that the length is a multiple of 4.
696 * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
697 * The the skb must also be an fc_frame.
698 *
699 * This is called from the lower-level driver with spinlocks held,
700 * so we must not take a mutex here.
701 */
702 int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
703 struct sk_buff *skb)
704 {
705 struct fc_frame *fp;
706 struct fc_frame_header *fh;
707 u16 old_xid;
708 u8 op;
709 u8 mac[ETH_ALEN];
710
711 fp = container_of(skb, struct fc_frame, skb);
712 fh = (struct fc_frame_header *)skb->data;
713 op = *(u8 *)(fh + 1);
714
715 if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) {
716 old_xid = fip->flogi_oxid;
717 fip->flogi_oxid = ntohs(fh->fh_ox_id);
718 if (fip->state == FIP_ST_AUTO) {
719 if (old_xid == FC_XID_UNKNOWN)
720 fip->flogi_count = 0;
721 fip->flogi_count++;
722 if (fip->flogi_count < 3)
723 goto drop;
724 fcoe_ctlr_map_dest(fip);
725 return 0;
726 }
727 if (fip->state == FIP_ST_NON_FIP)
728 fcoe_ctlr_map_dest(fip);
729 }
730
731 if (fip->state == FIP_ST_NON_FIP)
732 return 0;
733 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
734 goto drop;
735 switch (op) {
736 case ELS_FLOGI:
737 op = FIP_DT_FLOGI;
738 if (fip->mode == FIP_MODE_VN2VN)
739 break;
740 spin_lock_bh(&fip->ctlr_lock);
741 kfree_skb(fip->flogi_req);
742 fip->flogi_req = skb;
743 fip->flogi_req_send = 1;
744 spin_unlock_bh(&fip->ctlr_lock);
745 schedule_work(&fip->timer_work);
746 return -EINPROGRESS;
747 case ELS_FDISC:
748 if (ntoh24(fh->fh_s_id))
749 return 0;
750 op = FIP_DT_FDISC;
751 break;
752 case ELS_LOGO:
753 if (fip->mode == FIP_MODE_VN2VN) {
754 if (fip->state != FIP_ST_VNMP_UP)
755 return -EINVAL;
756 if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI)
757 return -EINVAL;
758 } else {
759 if (fip->state != FIP_ST_ENABLED)
760 return 0;
761 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
762 return 0;
763 }
764 op = FIP_DT_LOGO;
765 break;
766 case ELS_LS_ACC:
767 /*
768 * If non-FIP, we may have gotten an SID by accepting an FLOGI
769 * from a point-to-point connection. Switch to using
770 * the source mac based on the SID. The destination
771 * MAC in this case would have been set by receiving the
772 * FLOGI.
773 */
774 if (fip->state == FIP_ST_NON_FIP) {
775 if (fip->flogi_oxid == FC_XID_UNKNOWN)
776 return 0;
777 fip->flogi_oxid = FC_XID_UNKNOWN;
778 fc_fcoe_set_mac(mac, fh->fh_d_id);
779 fip->update_mac(lport, mac);
780 }
781 /* fall through */
782 case ELS_LS_RJT:
783 op = fr_encaps(fp);
784 if (op)
785 break;
786 return 0;
787 default:
788 if (fip->state != FIP_ST_ENABLED &&
789 fip->state != FIP_ST_VNMP_UP)
790 goto drop;
791 return 0;
792 }
793 LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n",
794 op, ntoh24(fh->fh_d_id));
795 if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id)))
796 goto drop;
797 fip->send(fip, skb);
798 return -EINPROGRESS;
799 drop:
800 kfree_skb(skb);
801 return -EINVAL;
802 }
803 EXPORT_SYMBOL(fcoe_ctlr_els_send);
804
805 /**
806 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
807 * @fip: The FCoE controller to free FCFs on
808 *
809 * Called with lock held and preemption disabled.
810 *
811 * An FCF is considered old if we have missed two advertisements.
812 * That is, there have been no valid advertisement from it for 2.5
813 * times its keep-alive period.
814 *
815 * In addition, determine the time when an FCF selection can occur.
816 *
817 * Also, increment the MissDiscAdvCount when no advertisement is received
818 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
819 *
820 * Returns the time in jiffies for the next call.
821 */
822 static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
823 {
824 struct fcoe_fcf *fcf;
825 struct fcoe_fcf *next;
826 unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
827 unsigned long deadline;
828 unsigned long sel_time = 0;
829 struct list_head del_list;
830 struct fc_stats *stats;
831
832 INIT_LIST_HEAD(&del_list);
833
834 stats = per_cpu_ptr(fip->lp->stats, get_cpu());
835
836 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
837 deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
838 if (fip->sel_fcf == fcf) {
839 if (time_after(jiffies, deadline)) {
840 stats->MissDiscAdvCount++;
841 printk(KERN_INFO "libfcoe: host%d: "
842 "Missing Discovery Advertisement "
843 "for fab %16.16llx count %lld\n",
844 fip->lp->host->host_no, fcf->fabric_name,
845 stats->MissDiscAdvCount);
846 } else if (time_after(next_timer, deadline))
847 next_timer = deadline;
848 }
849
850 deadline += fcf->fka_period;
851 if (time_after_eq(jiffies, deadline)) {
852 if (fip->sel_fcf == fcf)
853 fip->sel_fcf = NULL;
854 /*
855 * Move to delete list so we can call
856 * fcoe_sysfs_fcf_del (which can sleep)
857 * after the put_cpu().
858 */
859 list_del(&fcf->list);
860 list_add(&fcf->list, &del_list);
861 stats->VLinkFailureCount++;
862 } else {
863 if (time_after(next_timer, deadline))
864 next_timer = deadline;
865 if (fcoe_ctlr_mtu_valid(fcf) &&
866 (!sel_time || time_before(sel_time, fcf->time)))
867 sel_time = fcf->time;
868 }
869 }
870 put_cpu();
871
872 list_for_each_entry_safe(fcf, next, &del_list, list) {
873 /* Removes fcf from current list */
874 fcoe_sysfs_fcf_del(fcf);
875 }
876
877 if (sel_time && !fip->sel_fcf && !fip->sel_time) {
878 sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
879 fip->sel_time = sel_time;
880 }
881
882 return next_timer;
883 }
884
885 /**
886 * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
887 * @fip: The FCoE controller receiving the advertisement
888 * @skb: The received FIP advertisement frame
889 * @fcf: The resulting FCF entry
890 *
891 * Returns zero on a valid parsed advertisement,
892 * otherwise returns non zero value.
893 */
894 static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
895 struct sk_buff *skb, struct fcoe_fcf *fcf)
896 {
897 struct fip_header *fiph;
898 struct fip_desc *desc = NULL;
899 struct fip_wwn_desc *wwn;
900 struct fip_fab_desc *fab;
901 struct fip_fka_desc *fka;
902 unsigned long t;
903 size_t rlen;
904 size_t dlen;
905 u32 desc_mask;
906
907 memset(fcf, 0, sizeof(*fcf));
908 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
909
910 fiph = (struct fip_header *)skb->data;
911 fcf->flags = ntohs(fiph->fip_flags);
912
913 /*
914 * mask of required descriptors. validating each one clears its bit.
915 */
916 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
917 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
918
919 rlen = ntohs(fiph->fip_dl_len) * 4;
920 if (rlen + sizeof(*fiph) > skb->len)
921 return -EINVAL;
922
923 desc = (struct fip_desc *)(fiph + 1);
924 while (rlen > 0) {
925 dlen = desc->fip_dlen * FIP_BPW;
926 if (dlen < sizeof(*desc) || dlen > rlen)
927 return -EINVAL;
928 /* Drop Adv if there are duplicate critical descriptors */
929 if ((desc->fip_dtype < 32) &&
930 !(desc_mask & 1U << desc->fip_dtype)) {
931 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
932 "Descriptors in FIP adv\n");
933 return -EINVAL;
934 }
935 switch (desc->fip_dtype) {
936 case FIP_DT_PRI:
937 if (dlen != sizeof(struct fip_pri_desc))
938 goto len_err;
939 fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
940 desc_mask &= ~BIT(FIP_DT_PRI);
941 break;
942 case FIP_DT_MAC:
943 if (dlen != sizeof(struct fip_mac_desc))
944 goto len_err;
945 memcpy(fcf->fcf_mac,
946 ((struct fip_mac_desc *)desc)->fd_mac,
947 ETH_ALEN);
948 memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN);
949 if (!is_valid_ether_addr(fcf->fcf_mac)) {
950 LIBFCOE_FIP_DBG(fip,
951 "Invalid MAC addr %pM in FIP adv\n",
952 fcf->fcf_mac);
953 return -EINVAL;
954 }
955 desc_mask &= ~BIT(FIP_DT_MAC);
956 break;
957 case FIP_DT_NAME:
958 if (dlen != sizeof(struct fip_wwn_desc))
959 goto len_err;
960 wwn = (struct fip_wwn_desc *)desc;
961 fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
962 desc_mask &= ~BIT(FIP_DT_NAME);
963 break;
964 case FIP_DT_FAB:
965 if (dlen != sizeof(struct fip_fab_desc))
966 goto len_err;
967 fab = (struct fip_fab_desc *)desc;
968 fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
969 fcf->vfid = ntohs(fab->fd_vfid);
970 fcf->fc_map = ntoh24(fab->fd_map);
971 desc_mask &= ~BIT(FIP_DT_FAB);
972 break;
973 case FIP_DT_FKA:
974 if (dlen != sizeof(struct fip_fka_desc))
975 goto len_err;
976 fka = (struct fip_fka_desc *)desc;
977 if (fka->fd_flags & FIP_FKA_ADV_D)
978 fcf->fd_flags = 1;
979 t = ntohl(fka->fd_fka_period);
980 if (t >= FCOE_CTLR_MIN_FKA)
981 fcf->fka_period = msecs_to_jiffies(t);
982 desc_mask &= ~BIT(FIP_DT_FKA);
983 break;
984 case FIP_DT_MAP_OUI:
985 case FIP_DT_FCOE_SIZE:
986 case FIP_DT_FLOGI:
987 case FIP_DT_FDISC:
988 case FIP_DT_LOGO:
989 case FIP_DT_ELP:
990 default:
991 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
992 "in FIP adv\n", desc->fip_dtype);
993 /* standard says ignore unknown descriptors >= 128 */
994 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
995 return -EINVAL;
996 break;
997 }
998 desc = (struct fip_desc *)((char *)desc + dlen);
999 rlen -= dlen;
1000 }
1001 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
1002 return -EINVAL;
1003 if (!fcf->switch_name)
1004 return -EINVAL;
1005 if (desc_mask) {
1006 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
1007 desc_mask);
1008 return -EINVAL;
1009 }
1010 return 0;
1011
1012 len_err:
1013 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1014 desc->fip_dtype, dlen);
1015 return -EINVAL;
1016 }
1017
1018 /**
1019 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
1020 * @fip: The FCoE controller receiving the advertisement
1021 * @skb: The received FIP packet
1022 */
1023 static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1024 {
1025 struct fcoe_fcf *fcf;
1026 struct fcoe_fcf new;
1027 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
1028 int first = 0;
1029 int mtu_valid;
1030 int found = 0;
1031 int rc = 0;
1032
1033 if (fcoe_ctlr_parse_adv(fip, skb, &new))
1034 return;
1035
1036 mutex_lock(&fip->ctlr_mutex);
1037 first = list_empty(&fip->fcfs);
1038 list_for_each_entry(fcf, &fip->fcfs, list) {
1039 if (fcf->switch_name == new.switch_name &&
1040 fcf->fabric_name == new.fabric_name &&
1041 fcf->fc_map == new.fc_map &&
1042 ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) {
1043 found = 1;
1044 break;
1045 }
1046 }
1047 if (!found) {
1048 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
1049 goto out;
1050
1051 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
1052 if (!fcf)
1053 goto out;
1054
1055 memcpy(fcf, &new, sizeof(new));
1056 fcf->fip = fip;
1057 rc = fcoe_sysfs_fcf_add(fcf);
1058 if (rc) {
1059 printk(KERN_ERR "Failed to allocate sysfs instance "
1060 "for FCF, fab %16.16llx mac %pM\n",
1061 new.fabric_name, new.fcf_mac);
1062 kfree(fcf);
1063 goto out;
1064 }
1065 } else {
1066 /*
1067 * Update the FCF's keep-alive descriptor flags.
1068 * Other flag changes from new advertisements are
1069 * ignored after a solicited advertisement is
1070 * received and the FCF is selectable (usable).
1071 */
1072 fcf->fd_flags = new.fd_flags;
1073 if (!fcoe_ctlr_fcf_usable(fcf))
1074 fcf->flags = new.flags;
1075
1076 if (fcf == fip->sel_fcf && !fcf->fd_flags) {
1077 fip->ctlr_ka_time -= fcf->fka_period;
1078 fip->ctlr_ka_time += new.fka_period;
1079 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1080 mod_timer(&fip->timer, fip->ctlr_ka_time);
1081 }
1082 fcf->fka_period = new.fka_period;
1083 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
1084 }
1085
1086 mtu_valid = fcoe_ctlr_mtu_valid(fcf);
1087 fcf->time = jiffies;
1088 if (!found)
1089 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
1090 fcf->fabric_name, fcf->fcf_mac);
1091
1092 /*
1093 * If this advertisement is not solicited and our max receive size
1094 * hasn't been verified, send a solicited advertisement.
1095 */
1096 if (!mtu_valid)
1097 fcoe_ctlr_solicit(fip, fcf);
1098
1099 /*
1100 * If its been a while since we did a solicit, and this is
1101 * the first advertisement we've received, do a multicast
1102 * solicitation to gather as many advertisements as we can
1103 * before selection occurs.
1104 */
1105 if (first && time_after(jiffies, fip->sol_time + sol_tov))
1106 fcoe_ctlr_solicit(fip, NULL);
1107
1108 /*
1109 * Put this FCF at the head of the list for priority among equals.
1110 * This helps in the case of an NPV switch which insists we use
1111 * the FCF that answers multicast solicitations, not the others that
1112 * are sending periodic multicast advertisements.
1113 */
1114 if (mtu_valid)
1115 list_move(&fcf->list, &fip->fcfs);
1116
1117 /*
1118 * If this is the first validated FCF, note the time and
1119 * set a timer to trigger selection.
1120 */
1121 if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) {
1122 fip->sel_time = jiffies +
1123 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
1124 if (!timer_pending(&fip->timer) ||
1125 time_before(fip->sel_time, fip->timer.expires))
1126 mod_timer(&fip->timer, fip->sel_time);
1127 }
1128
1129 out:
1130 mutex_unlock(&fip->ctlr_mutex);
1131 }
1132
1133 /**
1134 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
1135 * @fip: The FCoE controller which received the packet
1136 * @skb: The received FIP packet
1137 */
1138 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1139 {
1140 struct fc_lport *lport = fip->lp;
1141 struct fip_header *fiph;
1142 struct fc_frame *fp = (struct fc_frame *)skb;
1143 struct fc_frame_header *fh = NULL;
1144 struct fip_desc *desc;
1145 struct fip_encaps *els;
1146 struct fcoe_fcf *sel;
1147 struct fc_stats *stats;
1148 enum fip_desc_type els_dtype = 0;
1149 u8 els_op;
1150 u8 sub;
1151 u8 granted_mac[ETH_ALEN] = { 0 };
1152 size_t els_len = 0;
1153 size_t rlen;
1154 size_t dlen;
1155 u32 desc_mask = 0;
1156 u32 desc_cnt = 0;
1157
1158 fiph = (struct fip_header *)skb->data;
1159 sub = fiph->fip_subcode;
1160 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1161 goto drop;
1162
1163 rlen = ntohs(fiph->fip_dl_len) * 4;
1164 if (rlen + sizeof(*fiph) > skb->len)
1165 goto drop;
1166
1167 desc = (struct fip_desc *)(fiph + 1);
1168 while (rlen > 0) {
1169 desc_cnt++;
1170 dlen = desc->fip_dlen * FIP_BPW;
1171 if (dlen < sizeof(*desc) || dlen > rlen)
1172 goto drop;
1173 /* Drop ELS if there are duplicate critical descriptors */
1174 if (desc->fip_dtype < 32) {
1175 if ((desc->fip_dtype != FIP_DT_MAC) &&
1176 (desc_mask & 1U << desc->fip_dtype)) {
1177 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1178 "Descriptors in FIP ELS\n");
1179 goto drop;
1180 }
1181 desc_mask |= (1 << desc->fip_dtype);
1182 }
1183 switch (desc->fip_dtype) {
1184 case FIP_DT_MAC:
1185 sel = fip->sel_fcf;
1186 if (desc_cnt == 1) {
1187 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1188 "received out of order\n");
1189 goto drop;
1190 }
1191 /*
1192 * Some switch implementations send two MAC descriptors,
1193 * with first MAC(granted_mac) being the FPMA, and the
1194 * second one(fcoe_mac) is used as destination address
1195 * for sending/receiving FCoE packets. FIP traffic is
1196 * sent using fip_mac. For regular switches, both
1197 * fip_mac and fcoe_mac would be the same.
1198 */
1199 if (desc_cnt == 2)
1200 memcpy(granted_mac,
1201 ((struct fip_mac_desc *)desc)->fd_mac,
1202 ETH_ALEN);
1203
1204 if (dlen != sizeof(struct fip_mac_desc))
1205 goto len_err;
1206
1207 if ((desc_cnt == 3) && (sel))
1208 memcpy(sel->fcoe_mac,
1209 ((struct fip_mac_desc *)desc)->fd_mac,
1210 ETH_ALEN);
1211 break;
1212 case FIP_DT_FLOGI:
1213 case FIP_DT_FDISC:
1214 case FIP_DT_LOGO:
1215 case FIP_DT_ELP:
1216 if (desc_cnt != 1) {
1217 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1218 "received out of order\n");
1219 goto drop;
1220 }
1221 if (fh)
1222 goto drop;
1223 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1224 goto len_err;
1225 els_len = dlen - sizeof(*els);
1226 els = (struct fip_encaps *)desc;
1227 fh = (struct fc_frame_header *)(els + 1);
1228 els_dtype = desc->fip_dtype;
1229 break;
1230 default:
1231 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1232 "in FIP adv\n", desc->fip_dtype);
1233 /* standard says ignore unknown descriptors >= 128 */
1234 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1235 goto drop;
1236 if (desc_cnt <= 2) {
1237 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1238 "received out of order\n");
1239 goto drop;
1240 }
1241 break;
1242 }
1243 desc = (struct fip_desc *)((char *)desc + dlen);
1244 rlen -= dlen;
1245 }
1246
1247 if (!fh)
1248 goto drop;
1249 els_op = *(u8 *)(fh + 1);
1250
1251 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
1252 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
1253 if (els_op == ELS_LS_ACC) {
1254 if (!is_valid_ether_addr(granted_mac)) {
1255 LIBFCOE_FIP_DBG(fip,
1256 "Invalid MAC address %pM in FIP ELS\n",
1257 granted_mac);
1258 goto drop;
1259 }
1260 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1261
1262 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1263 fip->flogi_oxid = FC_XID_UNKNOWN;
1264 if (els_dtype == FIP_DT_FLOGI)
1265 fcoe_ctlr_announce(fip);
1266 }
1267 } else if (els_dtype == FIP_DT_FLOGI &&
1268 !fcoe_ctlr_flogi_retry(fip))
1269 goto drop; /* retrying FLOGI so drop reject */
1270 }
1271
1272 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
1273 (!(1U << FIP_DT_MAC & desc_mask)))) {
1274 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
1275 "in FIP ELS\n");
1276 goto drop;
1277 }
1278
1279 /*
1280 * Convert skb into an fc_frame containing only the ELS.
1281 */
1282 skb_pull(skb, (u8 *)fh - skb->data);
1283 skb_trim(skb, els_len);
1284 fp = (struct fc_frame *)skb;
1285 fc_frame_init(fp);
1286 fr_sof(fp) = FC_SOF_I3;
1287 fr_eof(fp) = FC_EOF_T;
1288 fr_dev(fp) = lport;
1289 fr_encaps(fp) = els_dtype;
1290
1291 stats = per_cpu_ptr(lport->stats, get_cpu());
1292 stats->RxFrames++;
1293 stats->RxWords += skb->len / FIP_BPW;
1294 put_cpu();
1295
1296 fc_exch_recv(lport, fp);
1297 return;
1298
1299 len_err:
1300 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1301 desc->fip_dtype, dlen);
1302 drop:
1303 kfree_skb(skb);
1304 }
1305
1306 /**
1307 * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
1308 * @fip: The FCoE controller that received the frame
1309 * @fh: The received FIP header
1310 *
1311 * There may be multiple VN_Port descriptors.
1312 * The overall length has already been checked.
1313 */
1314 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1315 struct fip_header *fh)
1316 {
1317 struct fip_desc *desc;
1318 struct fip_mac_desc *mp;
1319 struct fip_wwn_desc *wp;
1320 struct fip_vn_desc *vp;
1321 size_t rlen;
1322 size_t dlen;
1323 struct fcoe_fcf *fcf = fip->sel_fcf;
1324 struct fc_lport *lport = fip->lp;
1325 struct fc_lport *vn_port = NULL;
1326 u32 desc_mask;
1327 int num_vlink_desc;
1328 int reset_phys_port = 0;
1329 struct fip_vn_desc **vlink_desc_arr = NULL;
1330
1331 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1332
1333 if (!fcf || !lport->port_id) {
1334 /*
1335 * We are yet to select best FCF, but we got CVL in the
1336 * meantime. reset the ctlr and let it rediscover the FCF
1337 */
1338 mutex_lock(&fip->ctlr_mutex);
1339 fcoe_ctlr_reset(fip);
1340 mutex_unlock(&fip->ctlr_mutex);
1341 return;
1342 }
1343
1344 /*
1345 * mask of required descriptors. Validating each one clears its bit.
1346 */
1347 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
1348
1349 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1350 desc = (struct fip_desc *)(fh + 1);
1351
1352 /*
1353 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
1354 * before determining max Vx_Port descriptor but a buggy FCF could have
1355 * omited either or both MAC Address and Name Identifier descriptors
1356 */
1357 num_vlink_desc = rlen / sizeof(*vp);
1358 if (num_vlink_desc)
1359 vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc,
1360 GFP_ATOMIC);
1361 if (!vlink_desc_arr)
1362 return;
1363 num_vlink_desc = 0;
1364
1365 while (rlen >= sizeof(*desc)) {
1366 dlen = desc->fip_dlen * FIP_BPW;
1367 if (dlen > rlen)
1368 goto err;
1369 /* Drop CVL if there are duplicate critical descriptors */
1370 if ((desc->fip_dtype < 32) &&
1371 (desc->fip_dtype != FIP_DT_VN_ID) &&
1372 !(desc_mask & 1U << desc->fip_dtype)) {
1373 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1374 "Descriptors in FIP CVL\n");
1375 goto err;
1376 }
1377 switch (desc->fip_dtype) {
1378 case FIP_DT_MAC:
1379 mp = (struct fip_mac_desc *)desc;
1380 if (dlen < sizeof(*mp))
1381 goto err;
1382 if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
1383 goto err;
1384 desc_mask &= ~BIT(FIP_DT_MAC);
1385 break;
1386 case FIP_DT_NAME:
1387 wp = (struct fip_wwn_desc *)desc;
1388 if (dlen < sizeof(*wp))
1389 goto err;
1390 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1391 goto err;
1392 desc_mask &= ~BIT(FIP_DT_NAME);
1393 break;
1394 case FIP_DT_VN_ID:
1395 vp = (struct fip_vn_desc *)desc;
1396 if (dlen < sizeof(*vp))
1397 goto err;
1398 vlink_desc_arr[num_vlink_desc++] = vp;
1399 vn_port = fc_vport_id_lookup(lport,
1400 ntoh24(vp->fd_fc_id));
1401 if (vn_port && (vn_port == lport)) {
1402 mutex_lock(&fip->ctlr_mutex);
1403 per_cpu_ptr(lport->stats,
1404 get_cpu())->VLinkFailureCount++;
1405 put_cpu();
1406 fcoe_ctlr_reset(fip);
1407 mutex_unlock(&fip->ctlr_mutex);
1408 }
1409 break;
1410 default:
1411 /* standard says ignore unknown descriptors >= 128 */
1412 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1413 goto err;
1414 break;
1415 }
1416 desc = (struct fip_desc *)((char *)desc + dlen);
1417 rlen -= dlen;
1418 }
1419
1420 /*
1421 * reset only if all required descriptors were present and valid.
1422 */
1423 if (desc_mask)
1424 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1425 desc_mask);
1426 else if (!num_vlink_desc) {
1427 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
1428 /*
1429 * No Vx_Port description. Clear all NPIV ports,
1430 * followed by physical port
1431 */
1432 mutex_lock(&fip->ctlr_mutex);
1433 per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++;
1434 put_cpu();
1435 fcoe_ctlr_reset(fip);
1436 mutex_unlock(&fip->ctlr_mutex);
1437
1438 mutex_lock(&lport->lp_mutex);
1439 list_for_each_entry(vn_port, &lport->vports, list)
1440 fc_lport_reset(vn_port);
1441 mutex_unlock(&lport->lp_mutex);
1442
1443 fc_lport_reset(fip->lp);
1444 fcoe_ctlr_solicit(fip, NULL);
1445 } else {
1446 int i;
1447
1448 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1449 for (i = 0; i < num_vlink_desc; i++) {
1450 vp = vlink_desc_arr[i];
1451 vn_port = fc_vport_id_lookup(lport,
1452 ntoh24(vp->fd_fc_id));
1453 if (!vn_port)
1454 continue;
1455
1456 /*
1457 * 'port_id' is already validated, check MAC address and
1458 * wwpn
1459 */
1460 if (!ether_addr_equal(fip->get_src_addr(vn_port),
1461 vp->fd_mac) ||
1462 get_unaligned_be64(&vp->fd_wwpn) !=
1463 vn_port->wwpn)
1464 continue;
1465
1466 if (vn_port == lport)
1467 /*
1468 * Physical port, defer processing till all
1469 * listed NPIV ports are cleared
1470 */
1471 reset_phys_port = 1;
1472 else /* NPIV port */
1473 fc_lport_reset(vn_port);
1474 }
1475
1476 if (reset_phys_port) {
1477 fc_lport_reset(fip->lp);
1478 fcoe_ctlr_solicit(fip, NULL);
1479 }
1480 }
1481
1482 err:
1483 kfree(vlink_desc_arr);
1484 }
1485
1486 /**
1487 * fcoe_ctlr_recv() - Receive a FIP packet
1488 * @fip: The FCoE controller that received the packet
1489 * @skb: The received FIP packet
1490 *
1491 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1492 */
1493 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1494 {
1495 skb = skb_share_check(skb, GFP_ATOMIC);
1496 if (!skb)
1497 return;
1498 skb_queue_tail(&fip->fip_recv_list, skb);
1499 schedule_work(&fip->recv_work);
1500 }
1501 EXPORT_SYMBOL(fcoe_ctlr_recv);
1502
1503 /**
1504 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1505 * @fip: The FCoE controller that received the frame
1506 * @skb: The received FIP frame
1507 *
1508 * Returns non-zero if the frame is dropped.
1509 */
1510 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1511 {
1512 struct fip_header *fiph;
1513 struct ethhdr *eh;
1514 enum fip_state state;
1515 u16 op;
1516 u8 sub;
1517
1518 if (skb_linearize(skb))
1519 goto drop;
1520 if (skb->len < sizeof(*fiph))
1521 goto drop;
1522 eh = eth_hdr(skb);
1523 if (fip->mode == FIP_MODE_VN2VN) {
1524 if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1525 !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
1526 !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
1527 goto drop;
1528 } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1529 !ether_addr_equal(eh->h_dest, fcoe_all_enode))
1530 goto drop;
1531 fiph = (struct fip_header *)skb->data;
1532 op = ntohs(fiph->fip_op);
1533 sub = fiph->fip_subcode;
1534
1535 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1536 goto drop;
1537 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1538 goto drop;
1539
1540 mutex_lock(&fip->ctlr_mutex);
1541 state = fip->state;
1542 if (state == FIP_ST_AUTO) {
1543 fip->map_dest = 0;
1544 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1545 state = FIP_ST_ENABLED;
1546 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1547 }
1548 mutex_unlock(&fip->ctlr_mutex);
1549
1550 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1551 return fcoe_ctlr_vn_recv(fip, skb);
1552
1553 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1554 state != FIP_ST_VNMP_CLAIM)
1555 goto drop;
1556
1557 if (op == FIP_OP_LS) {
1558 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1559 return 0;
1560 }
1561
1562 if (state != FIP_ST_ENABLED)
1563 goto drop;
1564
1565 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1566 fcoe_ctlr_recv_adv(fip, skb);
1567 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1568 fcoe_ctlr_recv_clr_vlink(fip, fiph);
1569 kfree_skb(skb);
1570 return 0;
1571 drop:
1572 kfree_skb(skb);
1573 return -1;
1574 }
1575
1576 /**
1577 * fcoe_ctlr_select() - Select the best FCF (if possible)
1578 * @fip: The FCoE controller
1579 *
1580 * Returns the selected FCF, or NULL if none are usable.
1581 *
1582 * If there are conflicting advertisements, no FCF can be chosen.
1583 *
1584 * If there is already a selected FCF, this will choose a better one or
1585 * an equivalent one that hasn't already been sent a FLOGI.
1586 *
1587 * Called with lock held.
1588 */
1589 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1590 {
1591 struct fcoe_fcf *fcf;
1592 struct fcoe_fcf *best = fip->sel_fcf;
1593
1594 list_for_each_entry(fcf, &fip->fcfs, list) {
1595 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1596 "VFID %d mac %pM map %x val %d "
1597 "sent %u pri %u\n",
1598 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1599 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1600 fcf->flogi_sent, fcf->pri);
1601 if (!fcoe_ctlr_fcf_usable(fcf)) {
1602 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1603 "map %x %svalid %savailable\n",
1604 fcf->fabric_name, fcf->fc_map,
1605 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1606 (fcf->flags & FIP_FL_AVAIL) ?
1607 "" : "un");
1608 continue;
1609 }
1610 if (!best || fcf->pri < best->pri || best->flogi_sent)
1611 best = fcf;
1612 if (fcf->fabric_name != best->fabric_name ||
1613 fcf->vfid != best->vfid ||
1614 fcf->fc_map != best->fc_map) {
1615 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1616 "or FC-MAP\n");
1617 return NULL;
1618 }
1619 }
1620 fip->sel_fcf = best;
1621 if (best) {
1622 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1623 fip->port_ka_time = jiffies +
1624 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1625 fip->ctlr_ka_time = jiffies + best->fka_period;
1626 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1627 mod_timer(&fip->timer, fip->ctlr_ka_time);
1628 }
1629 return best;
1630 }
1631
1632 /**
1633 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1634 * @fip: The FCoE controller
1635 *
1636 * Returns non-zero error if it could not be sent.
1637 *
1638 * Called with ctlr_mutex and ctlr_lock held.
1639 * Caller must verify that fip->sel_fcf is not NULL.
1640 */
1641 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1642 {
1643 struct sk_buff *skb;
1644 struct sk_buff *skb_orig;
1645 struct fc_frame_header *fh;
1646 int error;
1647
1648 skb_orig = fip->flogi_req;
1649 if (!skb_orig)
1650 return -EINVAL;
1651
1652 /*
1653 * Clone and send the FLOGI request. If clone fails, use original.
1654 */
1655 skb = skb_clone(skb_orig, GFP_ATOMIC);
1656 if (!skb) {
1657 skb = skb_orig;
1658 fip->flogi_req = NULL;
1659 }
1660 fh = (struct fc_frame_header *)skb->data;
1661 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1662 ntoh24(fh->fh_d_id));
1663 if (error) {
1664 kfree_skb(skb);
1665 return error;
1666 }
1667 fip->send(fip, skb);
1668 fip->sel_fcf->flogi_sent = 1;
1669 return 0;
1670 }
1671
1672 /**
1673 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1674 * @fip: The FCoE controller
1675 *
1676 * Returns non-zero error code if there's no FLOGI request to retry or
1677 * no alternate FCF available.
1678 */
1679 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1680 {
1681 struct fcoe_fcf *fcf;
1682 int error;
1683
1684 mutex_lock(&fip->ctlr_mutex);
1685 spin_lock_bh(&fip->ctlr_lock);
1686 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1687 fcf = fcoe_ctlr_select(fip);
1688 if (!fcf || fcf->flogi_sent) {
1689 kfree_skb(fip->flogi_req);
1690 fip->flogi_req = NULL;
1691 error = -ENOENT;
1692 } else {
1693 fcoe_ctlr_solicit(fip, NULL);
1694 error = fcoe_ctlr_flogi_send_locked(fip);
1695 }
1696 spin_unlock_bh(&fip->ctlr_lock);
1697 mutex_unlock(&fip->ctlr_mutex);
1698 return error;
1699 }
1700
1701
1702 /**
1703 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1704 * @fip: The FCoE controller that timed out
1705 *
1706 * Done here because fcoe_ctlr_els_send() can't get mutex.
1707 *
1708 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1709 */
1710 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1711 {
1712 struct fcoe_fcf *fcf;
1713
1714 spin_lock_bh(&fip->ctlr_lock);
1715 fcf = fip->sel_fcf;
1716 if (!fcf || !fip->flogi_req_send)
1717 goto unlock;
1718
1719 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1720
1721 /*
1722 * If this FLOGI is being sent due to a timeout retry
1723 * to the same FCF as before, select a different FCF if possible.
1724 */
1725 if (fcf->flogi_sent) {
1726 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1727 fcf = fcoe_ctlr_select(fip);
1728 if (!fcf || fcf->flogi_sent) {
1729 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1730 list_for_each_entry(fcf, &fip->fcfs, list)
1731 fcf->flogi_sent = 0;
1732 fcf = fcoe_ctlr_select(fip);
1733 }
1734 }
1735 if (fcf) {
1736 fcoe_ctlr_flogi_send_locked(fip);
1737 fip->flogi_req_send = 0;
1738 } else /* XXX */
1739 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1740 unlock:
1741 spin_unlock_bh(&fip->ctlr_lock);
1742 }
1743
1744 /**
1745 * fcoe_ctlr_timeout() - FIP timeout handler
1746 * @arg: The FCoE controller that timed out
1747 */
1748 static void fcoe_ctlr_timeout(unsigned long arg)
1749 {
1750 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1751
1752 schedule_work(&fip->timer_work);
1753 }
1754
1755 /**
1756 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1757 * @work: Handle to a FCoE controller
1758 *
1759 * Ages FCFs. Triggers FCF selection if possible.
1760 * Sends keep-alives and resets.
1761 */
1762 static void fcoe_ctlr_timer_work(struct work_struct *work)
1763 {
1764 struct fcoe_ctlr *fip;
1765 struct fc_lport *vport;
1766 u8 *mac;
1767 u8 reset = 0;
1768 u8 send_ctlr_ka = 0;
1769 u8 send_port_ka = 0;
1770 struct fcoe_fcf *sel;
1771 struct fcoe_fcf *fcf;
1772 unsigned long next_timer;
1773
1774 fip = container_of(work, struct fcoe_ctlr, timer_work);
1775 if (fip->mode == FIP_MODE_VN2VN)
1776 return fcoe_ctlr_vn_timeout(fip);
1777 mutex_lock(&fip->ctlr_mutex);
1778 if (fip->state == FIP_ST_DISABLED) {
1779 mutex_unlock(&fip->ctlr_mutex);
1780 return;
1781 }
1782
1783 fcf = fip->sel_fcf;
1784 next_timer = fcoe_ctlr_age_fcfs(fip);
1785
1786 sel = fip->sel_fcf;
1787 if (!sel && fip->sel_time) {
1788 if (time_after_eq(jiffies, fip->sel_time)) {
1789 sel = fcoe_ctlr_select(fip);
1790 fip->sel_time = 0;
1791 } else if (time_after(next_timer, fip->sel_time))
1792 next_timer = fip->sel_time;
1793 }
1794
1795 if (sel && fip->flogi_req_send)
1796 fcoe_ctlr_flogi_send(fip);
1797 else if (!sel && fcf)
1798 reset = 1;
1799
1800 if (sel && !sel->fd_flags) {
1801 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1802 fip->ctlr_ka_time = jiffies + sel->fka_period;
1803 send_ctlr_ka = 1;
1804 }
1805 if (time_after(next_timer, fip->ctlr_ka_time))
1806 next_timer = fip->ctlr_ka_time;
1807
1808 if (time_after_eq(jiffies, fip->port_ka_time)) {
1809 fip->port_ka_time = jiffies +
1810 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1811 send_port_ka = 1;
1812 }
1813 if (time_after(next_timer, fip->port_ka_time))
1814 next_timer = fip->port_ka_time;
1815 }
1816 if (!list_empty(&fip->fcfs))
1817 mod_timer(&fip->timer, next_timer);
1818 mutex_unlock(&fip->ctlr_mutex);
1819
1820 if (reset) {
1821 fc_lport_reset(fip->lp);
1822 /* restart things with a solicitation */
1823 fcoe_ctlr_solicit(fip, NULL);
1824 }
1825
1826 if (send_ctlr_ka)
1827 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1828
1829 if (send_port_ka) {
1830 mutex_lock(&fip->lp->lp_mutex);
1831 mac = fip->get_src_addr(fip->lp);
1832 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1833 list_for_each_entry(vport, &fip->lp->vports, list) {
1834 mac = fip->get_src_addr(vport);
1835 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1836 }
1837 mutex_unlock(&fip->lp->lp_mutex);
1838 }
1839 }
1840
1841 /**
1842 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1843 * @recv_work: Handle to a FCoE controller
1844 */
1845 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1846 {
1847 struct fcoe_ctlr *fip;
1848 struct sk_buff *skb;
1849
1850 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1851 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1852 fcoe_ctlr_recv_handler(fip, skb);
1853 }
1854
1855 /**
1856 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1857 * @fip: The FCoE controller
1858 * @fp: The FC frame to snoop
1859 *
1860 * Snoop potential response to FLOGI or even incoming FLOGI.
1861 *
1862 * The caller has checked that we are waiting for login as indicated
1863 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1864 *
1865 * The caller is responsible for freeing the frame.
1866 * Fill in the granted_mac address.
1867 *
1868 * Return non-zero if the frame should not be delivered to libfc.
1869 */
1870 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1871 struct fc_frame *fp)
1872 {
1873 struct fc_frame_header *fh;
1874 u8 op;
1875 u8 *sa;
1876
1877 sa = eth_hdr(&fp->skb)->h_source;
1878 fh = fc_frame_header_get(fp);
1879 if (fh->fh_type != FC_TYPE_ELS)
1880 return 0;
1881
1882 op = fc_frame_payload_op(fp);
1883 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1884 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1885
1886 mutex_lock(&fip->ctlr_mutex);
1887 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1888 mutex_unlock(&fip->ctlr_mutex);
1889 return -EINVAL;
1890 }
1891 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1892 LIBFCOE_FIP_DBG(fip,
1893 "received FLOGI LS_ACC using non-FIP mode\n");
1894
1895 /*
1896 * FLOGI accepted.
1897 * If the src mac addr is FC_OUI-based, then we mark the
1898 * address_mode flag to use FC_OUI-based Ethernet DA.
1899 * Otherwise we use the FCoE gateway addr
1900 */
1901 if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1902 fcoe_ctlr_map_dest(fip);
1903 } else {
1904 memcpy(fip->dest_addr, sa, ETH_ALEN);
1905 fip->map_dest = 0;
1906 }
1907 fip->flogi_oxid = FC_XID_UNKNOWN;
1908 mutex_unlock(&fip->ctlr_mutex);
1909 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1910 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1911 /*
1912 * Save source MAC for point-to-point responses.
1913 */
1914 mutex_lock(&fip->ctlr_mutex);
1915 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1916 memcpy(fip->dest_addr, sa, ETH_ALEN);
1917 fip->map_dest = 0;
1918 if (fip->state == FIP_ST_AUTO)
1919 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1920 "Setting non-FIP mode\n");
1921 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1922 }
1923 mutex_unlock(&fip->ctlr_mutex);
1924 }
1925 return 0;
1926 }
1927 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1928
1929 /**
1930 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1931 * @mac: The MAC address to convert
1932 * @scheme: The scheme to use when converting
1933 * @port: The port indicator for converting
1934 *
1935 * Returns: u64 fc world wide name
1936 */
1937 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1938 unsigned int scheme, unsigned int port)
1939 {
1940 u64 wwn;
1941 u64 host_mac;
1942
1943 /* The MAC is in NO, so flip only the low 48 bits */
1944 host_mac = ((u64) mac[0] << 40) |
1945 ((u64) mac[1] << 32) |
1946 ((u64) mac[2] << 24) |
1947 ((u64) mac[3] << 16) |
1948 ((u64) mac[4] << 8) |
1949 (u64) mac[5];
1950
1951 WARN_ON(host_mac >= (1ULL << 48));
1952 wwn = host_mac | ((u64) scheme << 60);
1953 switch (scheme) {
1954 case 1:
1955 WARN_ON(port != 0);
1956 break;
1957 case 2:
1958 WARN_ON(port >= 0xfff);
1959 wwn |= (u64) port << 48;
1960 break;
1961 default:
1962 WARN_ON(1);
1963 break;
1964 }
1965
1966 return wwn;
1967 }
1968 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1969
1970 /**
1971 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1972 * @rdata: libfc remote port
1973 */
1974 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1975 {
1976 return (struct fcoe_rport *)(rdata + 1);
1977 }
1978
1979 /**
1980 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
1981 * @fip: The FCoE controller
1982 * @sub: sub-opcode for probe request, reply, or advertisement.
1983 * @dest: The destination Ethernet MAC address
1984 * @min_len: minimum size of the Ethernet payload to be sent
1985 */
1986 static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
1987 enum fip_vn2vn_subcode sub,
1988 const u8 *dest, size_t min_len)
1989 {
1990 struct sk_buff *skb;
1991 struct fip_frame {
1992 struct ethhdr eth;
1993 struct fip_header fip;
1994 struct fip_mac_desc mac;
1995 struct fip_wwn_desc wwnn;
1996 struct fip_vn_desc vn;
1997 } __packed * frame;
1998 struct fip_fc4_feat *ff;
1999 struct fip_size_desc *size;
2000 u32 fcp_feat;
2001 size_t len;
2002 size_t dlen;
2003
2004 len = sizeof(*frame);
2005 dlen = 0;
2006 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2007 dlen = sizeof(struct fip_fc4_feat) +
2008 sizeof(struct fip_size_desc);
2009 len += dlen;
2010 }
2011 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
2012 len = max(len, min_len + sizeof(struct ethhdr));
2013
2014 skb = dev_alloc_skb(len);
2015 if (!skb)
2016 return;
2017
2018 frame = (struct fip_frame *)skb->data;
2019 memset(frame, 0, len);
2020 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2021
2022 if (sub == FIP_SC_VN_BEACON) {
2023 hton24(frame->eth.h_source, FIP_VN_FC_MAP);
2024 hton24(frame->eth.h_source + 3, fip->port_id);
2025 } else {
2026 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2027 }
2028 frame->eth.h_proto = htons(ETH_P_FIP);
2029
2030 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2031 frame->fip.fip_op = htons(FIP_OP_VN2VN);
2032 frame->fip.fip_subcode = sub;
2033 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2034
2035 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2036 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2037 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2038
2039 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
2040 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
2041 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
2042
2043 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
2044 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
2045 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
2046 hton24(frame->vn.fd_mac + 3, fip->port_id);
2047 hton24(frame->vn.fd_fc_id, fip->port_id);
2048 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
2049
2050 /*
2051 * For claims, add FC-4 features.
2052 * TBD: Add interface to get fc-4 types and features from libfc.
2053 */
2054 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2055 ff = (struct fip_fc4_feat *)(frame + 1);
2056 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
2057 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
2058 ff->fd_fts = fip->lp->fcts;
2059
2060 fcp_feat = 0;
2061 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
2062 fcp_feat |= FCP_FEAT_INIT;
2063 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
2064 fcp_feat |= FCP_FEAT_TARG;
2065 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
2066 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
2067
2068 size = (struct fip_size_desc *)(ff + 1);
2069 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
2070 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
2071 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
2072 }
2073
2074 skb_put(skb, len);
2075 skb->protocol = htons(ETH_P_FIP);
2076 skb->priority = fip->priority;
2077 skb_reset_mac_header(skb);
2078 skb_reset_network_header(skb);
2079
2080 fip->send(fip, skb);
2081 }
2082
2083 /**
2084 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
2085 * @lport: The lport which is receiving the event
2086 * @rdata: remote port private data
2087 * @event: The event that occurred
2088 *
2089 * Locking Note: The rport lock must not be held when calling this function.
2090 */
2091 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
2092 struct fc_rport_priv *rdata,
2093 enum fc_rport_event event)
2094 {
2095 struct fcoe_ctlr *fip = lport->disc.priv;
2096 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2097
2098 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
2099 rdata->ids.port_id, event);
2100
2101 mutex_lock(&fip->ctlr_mutex);
2102 switch (event) {
2103 case RPORT_EV_READY:
2104 frport->login_count = 0;
2105 break;
2106 case RPORT_EV_LOGO:
2107 case RPORT_EV_FAILED:
2108 case RPORT_EV_STOP:
2109 frport->login_count++;
2110 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
2111 LIBFCOE_FIP_DBG(fip,
2112 "rport FLOGI limited port_id %6.6x\n",
2113 rdata->ids.port_id);
2114 lport->tt.rport_logoff(rdata);
2115 }
2116 break;
2117 default:
2118 break;
2119 }
2120 mutex_unlock(&fip->ctlr_mutex);
2121 }
2122
2123 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
2124 .event_callback = fcoe_ctlr_vn_rport_callback,
2125 };
2126
2127 /**
2128 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
2129 * @fip: The FCoE controller
2130 *
2131 * Called with ctlr_mutex held.
2132 */
2133 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
2134 {
2135 struct fc_rport_priv *rdata;
2136
2137 mutex_lock(&lport->disc.disc_mutex);
2138 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers)
2139 lport->tt.rport_logoff(rdata);
2140 lport->disc.disc_callback = NULL;
2141 mutex_unlock(&lport->disc.disc_mutex);
2142 }
2143
2144 /**
2145 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
2146 * @fip: The FCoE controller
2147 *
2148 * Called through the local port template for discovery.
2149 * Called without the ctlr_mutex held.
2150 */
2151 static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
2152 {
2153 struct fcoe_ctlr *fip = lport->disc.priv;
2154
2155 mutex_lock(&fip->ctlr_mutex);
2156 fcoe_ctlr_disc_stop_locked(lport);
2157 mutex_unlock(&fip->ctlr_mutex);
2158 }
2159
2160 /**
2161 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
2162 * @fip: The FCoE controller
2163 *
2164 * Called through the local port template for discovery.
2165 * Called without the ctlr_mutex held.
2166 */
2167 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
2168 {
2169 fcoe_ctlr_disc_stop(lport);
2170 lport->tt.rport_flush_queue();
2171 synchronize_rcu();
2172 }
2173
2174 /**
2175 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
2176 * @fip: The FCoE controller
2177 *
2178 * Called with fcoe_ctlr lock held.
2179 */
2180 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
2181 {
2182 unsigned long wait;
2183 u32 port_id;
2184
2185 fcoe_ctlr_disc_stop_locked(fip->lp);
2186
2187 /*
2188 * Get proposed port ID.
2189 * If this is the first try after link up, use any previous port_id.
2190 * If there was none, use the low bits of the port_name.
2191 * On subsequent tries, get the next random one.
2192 * Don't use reserved IDs, use another non-zero value, just as random.
2193 */
2194 port_id = fip->port_id;
2195 if (fip->probe_tries)
2196 port_id = prandom_u32_state(&fip->rnd_state) & 0xffff;
2197 else if (!port_id)
2198 port_id = fip->lp->wwpn & 0xffff;
2199 if (!port_id || port_id == 0xffff)
2200 port_id = 1;
2201 fip->port_id = port_id;
2202
2203 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
2204 fip->probe_tries++;
2205 wait = prandom_u32() % FIP_VN_PROBE_WAIT;
2206 } else
2207 wait = FIP_VN_RLIM_INT;
2208 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
2209 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
2210 }
2211
2212 /**
2213 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2214 * @fip: The FCoE controller
2215 *
2216 * Called with fcoe_ctlr lock held.
2217 */
2218 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2219 {
2220 fip->probe_tries = 0;
2221 prandom_seed_state(&fip->rnd_state, fip->lp->wwpn);
2222 fcoe_ctlr_vn_restart(fip);
2223 }
2224
2225 /**
2226 * fcoe_ctlr_vn_parse - parse probe request or response
2227 * @fip: The FCoE controller
2228 * @skb: incoming packet
2229 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
2230 *
2231 * Returns non-zero error number on error.
2232 * Does not consume the packet.
2233 */
2234 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2235 struct sk_buff *skb,
2236 struct fc_rport_priv *rdata)
2237 {
2238 struct fip_header *fiph;
2239 struct fip_desc *desc = NULL;
2240 struct fip_mac_desc *macd = NULL;
2241 struct fip_wwn_desc *wwn = NULL;
2242 struct fip_vn_desc *vn = NULL;
2243 struct fip_size_desc *size = NULL;
2244 struct fcoe_rport *frport;
2245 size_t rlen;
2246 size_t dlen;
2247 u32 desc_mask = 0;
2248 u32 dtype;
2249 u8 sub;
2250
2251 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2252 frport = fcoe_ctlr_rport(rdata);
2253
2254 fiph = (struct fip_header *)skb->data;
2255 frport->flags = ntohs(fiph->fip_flags);
2256
2257 sub = fiph->fip_subcode;
2258 switch (sub) {
2259 case FIP_SC_VN_PROBE_REQ:
2260 case FIP_SC_VN_PROBE_REP:
2261 case FIP_SC_VN_BEACON:
2262 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2263 BIT(FIP_DT_VN_ID);
2264 break;
2265 case FIP_SC_VN_CLAIM_NOTIFY:
2266 case FIP_SC_VN_CLAIM_REP:
2267 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2268 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2269 BIT(FIP_DT_FCOE_SIZE);
2270 break;
2271 default:
2272 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2273 return -EINVAL;
2274 }
2275
2276 rlen = ntohs(fiph->fip_dl_len) * 4;
2277 if (rlen + sizeof(*fiph) > skb->len)
2278 return -EINVAL;
2279
2280 desc = (struct fip_desc *)(fiph + 1);
2281 while (rlen > 0) {
2282 dlen = desc->fip_dlen * FIP_BPW;
2283 if (dlen < sizeof(*desc) || dlen > rlen)
2284 return -EINVAL;
2285
2286 dtype = desc->fip_dtype;
2287 if (dtype < 32) {
2288 if (!(desc_mask & BIT(dtype))) {
2289 LIBFCOE_FIP_DBG(fip,
2290 "unexpected or duplicated desc "
2291 "desc type %u in "
2292 "FIP VN2VN subtype %u\n",
2293 dtype, sub);
2294 return -EINVAL;
2295 }
2296 desc_mask &= ~BIT(dtype);
2297 }
2298
2299 switch (dtype) {
2300 case FIP_DT_MAC:
2301 if (dlen != sizeof(struct fip_mac_desc))
2302 goto len_err;
2303 macd = (struct fip_mac_desc *)desc;
2304 if (!is_valid_ether_addr(macd->fd_mac)) {
2305 LIBFCOE_FIP_DBG(fip,
2306 "Invalid MAC addr %pM in FIP VN2VN\n",
2307 macd->fd_mac);
2308 return -EINVAL;
2309 }
2310 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2311 break;
2312 case FIP_DT_NAME:
2313 if (dlen != sizeof(struct fip_wwn_desc))
2314 goto len_err;
2315 wwn = (struct fip_wwn_desc *)desc;
2316 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2317 break;
2318 case FIP_DT_VN_ID:
2319 if (dlen != sizeof(struct fip_vn_desc))
2320 goto len_err;
2321 vn = (struct fip_vn_desc *)desc;
2322 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2323 rdata->ids.port_id = ntoh24(vn->fd_fc_id);
2324 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
2325 break;
2326 case FIP_DT_FC4F:
2327 if (dlen != sizeof(struct fip_fc4_feat))
2328 goto len_err;
2329 break;
2330 case FIP_DT_FCOE_SIZE:
2331 if (dlen != sizeof(struct fip_size_desc))
2332 goto len_err;
2333 size = (struct fip_size_desc *)desc;
2334 frport->fcoe_len = ntohs(size->fd_size);
2335 break;
2336 default:
2337 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2338 "in FIP probe\n", dtype);
2339 /* standard says ignore unknown descriptors >= 128 */
2340 if (dtype < FIP_DT_VENDOR_BASE)
2341 return -EINVAL;
2342 break;
2343 }
2344 desc = (struct fip_desc *)((char *)desc + dlen);
2345 rlen -= dlen;
2346 }
2347 return 0;
2348
2349 len_err:
2350 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2351 dtype, dlen);
2352 return -EINVAL;
2353 }
2354
2355 /**
2356 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2357 * @fip: The FCoE controller
2358 *
2359 * Called with ctlr_mutex held.
2360 */
2361 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2362 {
2363 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2364 fip->sol_time = jiffies;
2365 }
2366
2367 /**
2368 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2369 * @fip: The FCoE controller
2370 * @rdata: parsed remote port with frport from the probe request
2371 *
2372 * Called with ctlr_mutex held.
2373 */
2374 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2375 struct fc_rport_priv *rdata)
2376 {
2377 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2378
2379 if (rdata->ids.port_id != fip->port_id)
2380 return;
2381
2382 switch (fip->state) {
2383 case FIP_ST_VNMP_CLAIM:
2384 case FIP_ST_VNMP_UP:
2385 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2386 frport->enode_mac, 0);
2387 break;
2388 case FIP_ST_VNMP_PROBE1:
2389 case FIP_ST_VNMP_PROBE2:
2390 /*
2391 * Decide whether to reply to the Probe.
2392 * Our selected address is never a "recorded" one, so
2393 * only reply if our WWPN is greater and the
2394 * Probe's REC bit is not set.
2395 * If we don't reply, we will change our address.
2396 */
2397 if (fip->lp->wwpn > rdata->ids.port_name &&
2398 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2399 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2400 frport->enode_mac, 0);
2401 break;
2402 }
2403 /* fall through */
2404 case FIP_ST_VNMP_START:
2405 fcoe_ctlr_vn_restart(fip);
2406 break;
2407 default:
2408 break;
2409 }
2410 }
2411
2412 /**
2413 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2414 * @fip: The FCoE controller
2415 * @rdata: parsed remote port with frport from the probe request
2416 *
2417 * Called with ctlr_mutex held.
2418 */
2419 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2420 struct fc_rport_priv *rdata)
2421 {
2422 if (rdata->ids.port_id != fip->port_id)
2423 return;
2424 switch (fip->state) {
2425 case FIP_ST_VNMP_START:
2426 case FIP_ST_VNMP_PROBE1:
2427 case FIP_ST_VNMP_PROBE2:
2428 case FIP_ST_VNMP_CLAIM:
2429 fcoe_ctlr_vn_restart(fip);
2430 break;
2431 case FIP_ST_VNMP_UP:
2432 fcoe_ctlr_vn_send_claim(fip);
2433 break;
2434 default:
2435 break;
2436 }
2437 }
2438
2439 /**
2440 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2441 * @fip: The FCoE controller
2442 * @new: newly-parsed remote port with frport as a template for new rdata
2443 *
2444 * Called with ctlr_mutex held.
2445 */
2446 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
2447 {
2448 struct fc_lport *lport = fip->lp;
2449 struct fc_rport_priv *rdata;
2450 struct fc_rport_identifiers *ids;
2451 struct fcoe_rport *frport;
2452 u32 port_id;
2453
2454 port_id = new->ids.port_id;
2455 if (port_id == fip->port_id)
2456 return;
2457
2458 mutex_lock(&lport->disc.disc_mutex);
2459 rdata = lport->tt.rport_create(lport, port_id);
2460 if (!rdata) {
2461 mutex_unlock(&lport->disc.disc_mutex);
2462 return;
2463 }
2464
2465 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2466 rdata->disc_id = lport->disc.disc_id;
2467
2468 ids = &rdata->ids;
2469 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
2470 (ids->node_name != -1 && ids->node_name != new->ids.node_name))
2471 lport->tt.rport_logoff(rdata);
2472 ids->port_name = new->ids.port_name;
2473 ids->node_name = new->ids.node_name;
2474 mutex_unlock(&lport->disc.disc_mutex);
2475
2476 frport = fcoe_ctlr_rport(rdata);
2477 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
2478 port_id, frport->fcoe_len ? "old" : "new");
2479 *frport = *fcoe_ctlr_rport(new);
2480 frport->time = 0;
2481 }
2482
2483 /**
2484 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2485 * @fip: The FCoE controller
2486 * @port_id: The port_id of the remote VN_node
2487 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2488 *
2489 * Returns non-zero error if no remote port found.
2490 */
2491 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2492 {
2493 struct fc_lport *lport = fip->lp;
2494 struct fc_rport_priv *rdata;
2495 struct fcoe_rport *frport;
2496 int ret = -1;
2497
2498 rcu_read_lock();
2499 rdata = lport->tt.rport_lookup(lport, port_id);
2500 if (rdata) {
2501 frport = fcoe_ctlr_rport(rdata);
2502 memcpy(mac, frport->enode_mac, ETH_ALEN);
2503 ret = 0;
2504 }
2505 rcu_read_unlock();
2506 return ret;
2507 }
2508
2509 /**
2510 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2511 * @fip: The FCoE controller
2512 * @new: newly-parsed remote port with frport as a template for new rdata
2513 *
2514 * Called with ctlr_mutex held.
2515 */
2516 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2517 struct fc_rport_priv *new)
2518 {
2519 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
2520
2521 if (frport->flags & FIP_FL_REC_OR_P2P) {
2522 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2523 return;
2524 }
2525 switch (fip->state) {
2526 case FIP_ST_VNMP_START:
2527 case FIP_ST_VNMP_PROBE1:
2528 case FIP_ST_VNMP_PROBE2:
2529 if (new->ids.port_id == fip->port_id)
2530 fcoe_ctlr_vn_restart(fip);
2531 break;
2532 case FIP_ST_VNMP_CLAIM:
2533 case FIP_ST_VNMP_UP:
2534 if (new->ids.port_id == fip->port_id) {
2535 if (new->ids.port_name > fip->lp->wwpn) {
2536 fcoe_ctlr_vn_restart(fip);
2537 break;
2538 }
2539 fcoe_ctlr_vn_send_claim(fip);
2540 break;
2541 }
2542 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
2543 min((u32)frport->fcoe_len,
2544 fcoe_ctlr_fcoe_size(fip)));
2545 fcoe_ctlr_vn_add(fip, new);
2546 break;
2547 default:
2548 break;
2549 }
2550 }
2551
2552 /**
2553 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2554 * @fip: The FCoE controller that received the frame
2555 * @new: newly-parsed remote port with frport from the Claim Response
2556 *
2557 * Called with ctlr_mutex held.
2558 */
2559 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2560 struct fc_rport_priv *new)
2561 {
2562 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2563 new->ids.port_id, fcoe_ctlr_state(fip->state));
2564 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2565 fcoe_ctlr_vn_add(fip, new);
2566 }
2567
2568 /**
2569 * fcoe_ctlr_vn_beacon() - handle received beacon.
2570 * @fip: The FCoE controller that received the frame
2571 * @new: newly-parsed remote port with frport from the Beacon
2572 *
2573 * Called with ctlr_mutex held.
2574 */
2575 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2576 struct fc_rport_priv *new)
2577 {
2578 struct fc_lport *lport = fip->lp;
2579 struct fc_rport_priv *rdata;
2580 struct fcoe_rport *frport;
2581
2582 frport = fcoe_ctlr_rport(new);
2583 if (frport->flags & FIP_FL_REC_OR_P2P) {
2584 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2585 return;
2586 }
2587 mutex_lock(&lport->disc.disc_mutex);
2588 rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
2589 if (rdata)
2590 kref_get(&rdata->kref);
2591 mutex_unlock(&lport->disc.disc_mutex);
2592 if (rdata) {
2593 if (rdata->ids.node_name == new->ids.node_name &&
2594 rdata->ids.port_name == new->ids.port_name) {
2595 frport = fcoe_ctlr_rport(rdata);
2596 if (!frport->time && fip->state == FIP_ST_VNMP_UP)
2597 lport->tt.rport_login(rdata);
2598 frport->time = jiffies;
2599 }
2600 kref_put(&rdata->kref, lport->tt.rport_destroy);
2601 return;
2602 }
2603 if (fip->state != FIP_ST_VNMP_UP)
2604 return;
2605
2606 /*
2607 * Beacon from a new neighbor.
2608 * Send a claim notify if one hasn't been sent recently.
2609 * Don't add the neighbor yet.
2610 */
2611 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2612 new->ids.port_id);
2613 if (time_after(jiffies,
2614 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2615 fcoe_ctlr_vn_send_claim(fip);
2616 }
2617
2618 /**
2619 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2620 * @fip: The FCoE controller
2621 *
2622 * Called with ctlr_mutex held.
2623 * Called only in state FIP_ST_VNMP_UP.
2624 * Returns the soonest time for next age-out or a time far in the future.
2625 */
2626 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2627 {
2628 struct fc_lport *lport = fip->lp;
2629 struct fc_rport_priv *rdata;
2630 struct fcoe_rport *frport;
2631 unsigned long next_time;
2632 unsigned long deadline;
2633
2634 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2635 mutex_lock(&lport->disc.disc_mutex);
2636 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2637 frport = fcoe_ctlr_rport(rdata);
2638 if (!frport->time)
2639 continue;
2640 deadline = frport->time +
2641 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2642 if (time_after_eq(jiffies, deadline)) {
2643 frport->time = 0;
2644 LIBFCOE_FIP_DBG(fip,
2645 "port %16.16llx fc_id %6.6x beacon expired\n",
2646 rdata->ids.port_name, rdata->ids.port_id);
2647 lport->tt.rport_logoff(rdata);
2648 } else if (time_before(deadline, next_time))
2649 next_time = deadline;
2650 }
2651 mutex_unlock(&lport->disc.disc_mutex);
2652 return next_time;
2653 }
2654
2655 /**
2656 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2657 * @fip: The FCoE controller that received the frame
2658 * @skb: The received FIP frame
2659 *
2660 * Returns non-zero if the frame is dropped.
2661 * Always consumes the frame.
2662 */
2663 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2664 {
2665 struct fip_header *fiph;
2666 enum fip_vn2vn_subcode sub;
2667 struct {
2668 struct fc_rport_priv rdata;
2669 struct fcoe_rport frport;
2670 } buf;
2671 int rc;
2672
2673 fiph = (struct fip_header *)skb->data;
2674 sub = fiph->fip_subcode;
2675
2676 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
2677 if (rc) {
2678 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2679 goto drop;
2680 }
2681
2682 mutex_lock(&fip->ctlr_mutex);
2683 switch (sub) {
2684 case FIP_SC_VN_PROBE_REQ:
2685 fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
2686 break;
2687 case FIP_SC_VN_PROBE_REP:
2688 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
2689 break;
2690 case FIP_SC_VN_CLAIM_NOTIFY:
2691 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
2692 break;
2693 case FIP_SC_VN_CLAIM_REP:
2694 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
2695 break;
2696 case FIP_SC_VN_BEACON:
2697 fcoe_ctlr_vn_beacon(fip, &buf.rdata);
2698 break;
2699 default:
2700 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2701 rc = -1;
2702 break;
2703 }
2704 mutex_unlock(&fip->ctlr_mutex);
2705 drop:
2706 kfree_skb(skb);
2707 return rc;
2708 }
2709
2710 /**
2711 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2712 * @lport: The local port
2713 * @fp: The received frame
2714 *
2715 * This should never be called since we don't see RSCNs or other
2716 * fabric-generated ELSes.
2717 */
2718 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2719 {
2720 struct fc_seq_els_data rjt_data;
2721
2722 rjt_data.reason = ELS_RJT_UNSUP;
2723 rjt_data.explan = ELS_EXPL_NONE;
2724 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2725 fc_frame_free(fp);
2726 }
2727
2728 /**
2729 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2730 * @fip: The FCoE controller
2731 *
2732 * This sets a flag indicating that remote ports should be created
2733 * and started for the peers we discover. We use the disc_callback
2734 * pointer as that flag. Peers already discovered are created here.
2735 *
2736 * The lport lock is held during this call. The callback must be done
2737 * later, without holding either the lport or discovery locks.
2738 * The fcoe_ctlr lock may also be held during this call.
2739 */
2740 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2741 enum fc_disc_event),
2742 struct fc_lport *lport)
2743 {
2744 struct fc_disc *disc = &lport->disc;
2745 struct fcoe_ctlr *fip = disc->priv;
2746
2747 mutex_lock(&disc->disc_mutex);
2748 disc->disc_callback = callback;
2749 disc->disc_id = (disc->disc_id + 2) | 1;
2750 disc->pending = 1;
2751 schedule_work(&fip->timer_work);
2752 mutex_unlock(&disc->disc_mutex);
2753 }
2754
2755 /**
2756 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2757 * @fip: The FCoE controller
2758 *
2759 * Starts the FLOGI and PLOGI login process to each discovered rport for which
2760 * we've received at least one beacon.
2761 * Performs the discovery complete callback.
2762 */
2763 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
2764 {
2765 struct fc_lport *lport = fip->lp;
2766 struct fc_disc *disc = &lport->disc;
2767 struct fc_rport_priv *rdata;
2768 struct fcoe_rport *frport;
2769 void (*callback)(struct fc_lport *, enum fc_disc_event);
2770
2771 mutex_lock(&disc->disc_mutex);
2772 callback = disc->pending ? disc->disc_callback : NULL;
2773 disc->pending = 0;
2774 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
2775 frport = fcoe_ctlr_rport(rdata);
2776 if (frport->time)
2777 lport->tt.rport_login(rdata);
2778 }
2779 mutex_unlock(&disc->disc_mutex);
2780 if (callback)
2781 callback(lport, DISC_EV_SUCCESS);
2782 }
2783
2784 /**
2785 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
2786 * @fip: The FCoE controller
2787 */
2788 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
2789 {
2790 unsigned long next_time;
2791 u8 mac[ETH_ALEN];
2792 u32 new_port_id = 0;
2793
2794 mutex_lock(&fip->ctlr_mutex);
2795 switch (fip->state) {
2796 case FIP_ST_VNMP_START:
2797 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
2798 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2799 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
2800 break;
2801 case FIP_ST_VNMP_PROBE1:
2802 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
2803 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2804 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2805 break;
2806 case FIP_ST_VNMP_PROBE2:
2807 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
2808 new_port_id = fip->port_id;
2809 hton24(mac, FIP_VN_FC_MAP);
2810 hton24(mac + 3, new_port_id);
2811 fcoe_ctlr_map_dest(fip);
2812 fip->update_mac(fip->lp, mac);
2813 fcoe_ctlr_vn_send_claim(fip);
2814 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2815 break;
2816 case FIP_ST_VNMP_CLAIM:
2817 /*
2818 * This may be invoked either by starting discovery so don't
2819 * go to the next state unless it's been long enough.
2820 */
2821 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2822 if (time_after_eq(jiffies, next_time)) {
2823 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
2824 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2825 fcoe_all_vn2vn, 0);
2826 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2827 fip->port_ka_time = next_time;
2828 }
2829 fcoe_ctlr_vn_disc(fip);
2830 break;
2831 case FIP_ST_VNMP_UP:
2832 next_time = fcoe_ctlr_vn_age(fip);
2833 if (time_after_eq(jiffies, fip->port_ka_time)) {
2834 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2835 fcoe_all_vn2vn, 0);
2836 fip->port_ka_time = jiffies +
2837 msecs_to_jiffies(FIP_VN_BEACON_INT +
2838 (prandom_u32() % FIP_VN_BEACON_FUZZ));
2839 }
2840 if (time_before(fip->port_ka_time, next_time))
2841 next_time = fip->port_ka_time;
2842 break;
2843 case FIP_ST_LINK_WAIT:
2844 goto unlock;
2845 default:
2846 WARN(1, "unexpected state %d\n", fip->state);
2847 goto unlock;
2848 }
2849 mod_timer(&fip->timer, next_time);
2850 unlock:
2851 mutex_unlock(&fip->ctlr_mutex);
2852
2853 /* If port ID is new, notify local port after dropping ctlr_mutex */
2854 if (new_port_id)
2855 fc_lport_set_local_id(fip->lp, new_port_id);
2856 }
2857
2858 /**
2859 * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode
2860 * @lport: The local port to be (re)configured
2861 * @fip: The FCoE controller whose mode is changing
2862 * @fip_mode: The new fip mode
2863 *
2864 * Note that the we shouldn't be changing the libfc discovery settings
2865 * (fc_disc_config) while an lport is going through the libfc state
2866 * machine. The mode can only be changed when a fcoe_ctlr device is
2867 * disabled, so that should ensure that this routine is only called
2868 * when nothing is happening.
2869 */
2870 static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
2871 enum fip_state fip_mode)
2872 {
2873 void *priv;
2874
2875 WARN_ON(lport->state != LPORT_ST_RESET &&
2876 lport->state != LPORT_ST_DISABLED);
2877
2878 if (fip_mode == FIP_MODE_VN2VN) {
2879 lport->rport_priv_size = sizeof(struct fcoe_rport);
2880 lport->point_to_multipoint = 1;
2881 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
2882 lport->tt.disc_start = fcoe_ctlr_disc_start;
2883 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
2884 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
2885 priv = fip;
2886 } else {
2887 lport->rport_priv_size = 0;
2888 lport->point_to_multipoint = 0;
2889 lport->tt.disc_recv_req = NULL;
2890 lport->tt.disc_start = NULL;
2891 lport->tt.disc_stop = NULL;
2892 lport->tt.disc_stop_final = NULL;
2893 priv = lport;
2894 }
2895
2896 fc_disc_config(lport, priv);
2897 }
2898
2899 /**
2900 * fcoe_libfc_config() - Sets up libfc related properties for local port
2901 * @lport: The local port to configure libfc for
2902 * @fip: The FCoE controller in use by the local port
2903 * @tt: The libfc function template
2904 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
2905 *
2906 * Returns : 0 for success
2907 */
2908 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
2909 const struct libfc_function_template *tt, int init_fcp)
2910 {
2911 /* Set the function pointers set by the LLDD */
2912 memcpy(&lport->tt, tt, sizeof(*tt));
2913 if (init_fcp && fc_fcp_init(lport))
2914 return -ENOMEM;
2915 fc_exch_init(lport);
2916 fc_elsct_init(lport);
2917 fc_lport_init(lport);
2918 fc_rport_init(lport);
2919 fc_disc_init(lport);
2920 fcoe_ctlr_mode_set(lport, fip, fip->mode);
2921 return 0;
2922 }
2923 EXPORT_SYMBOL_GPL(fcoe_libfc_config);
2924
2925 void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev)
2926 {
2927 struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2928 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
2929 struct fcoe_fcf *fcf;
2930
2931 mutex_lock(&fip->ctlr_mutex);
2932 mutex_lock(&ctlr_dev->lock);
2933
2934 fcf = fcoe_fcf_device_priv(fcf_dev);
2935 if (fcf)
2936 fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0;
2937 else
2938 fcf_dev->selected = 0;
2939
2940 mutex_unlock(&ctlr_dev->lock);
2941 mutex_unlock(&fip->ctlr_mutex);
2942 }
2943 EXPORT_SYMBOL(fcoe_fcf_get_selected);
2944
2945 void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)
2946 {
2947 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2948 struct fc_lport *lport = ctlr->lp;
2949
2950 mutex_lock(&ctlr->ctlr_mutex);
2951 switch (ctlr_dev->mode) {
2952 case FIP_CONN_TYPE_VN2VN:
2953 ctlr->mode = FIP_MODE_VN2VN;
2954 break;
2955 case FIP_CONN_TYPE_FABRIC:
2956 default:
2957 ctlr->mode = FIP_MODE_FABRIC;
2958 break;
2959 }
2960
2961 mutex_unlock(&ctlr->ctlr_mutex);
2962
2963 fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode);
2964 }
2965 EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);
Linux with added FPC-III support