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Merge branch 'linux-4.6' of git://github.com/skeggsb/linux into drm-fixes
[deliverable/linux.git] / drivers / scsi / fcoe / fcoe_ctlr.c
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 && !fip->sel_time &&
1122 fcoe_ctlr_fcf_usable(fcf)) {
1123 fip->sel_time = jiffies +
1124 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
1125 if (!timer_pending(&fip->timer) ||
1126 time_before(fip->sel_time, fip->timer.expires))
1127 mod_timer(&fip->timer, fip->sel_time);
1128 }
1129
1130 out:
1131 mutex_unlock(&fip->ctlr_mutex);
1132 }
1133
1134 /**
1135 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
1136 * @fip: The FCoE controller which received the packet
1137 * @skb: The received FIP packet
1138 */
1139 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1140 {
1141 struct fc_lport *lport = fip->lp;
1142 struct fip_header *fiph;
1143 struct fc_frame *fp = (struct fc_frame *)skb;
1144 struct fc_frame_header *fh = NULL;
1145 struct fip_desc *desc;
1146 struct fip_encaps *els;
1147 struct fcoe_fcf *sel;
1148 struct fc_stats *stats;
1149 enum fip_desc_type els_dtype = 0;
1150 u8 els_op;
1151 u8 sub;
1152 u8 granted_mac[ETH_ALEN] = { 0 };
1153 size_t els_len = 0;
1154 size_t rlen;
1155 size_t dlen;
1156 u32 desc_mask = 0;
1157 u32 desc_cnt = 0;
1158
1159 fiph = (struct fip_header *)skb->data;
1160 sub = fiph->fip_subcode;
1161 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1162 goto drop;
1163
1164 rlen = ntohs(fiph->fip_dl_len) * 4;
1165 if (rlen + sizeof(*fiph) > skb->len)
1166 goto drop;
1167
1168 desc = (struct fip_desc *)(fiph + 1);
1169 while (rlen > 0) {
1170 desc_cnt++;
1171 dlen = desc->fip_dlen * FIP_BPW;
1172 if (dlen < sizeof(*desc) || dlen > rlen)
1173 goto drop;
1174 /* Drop ELS if there are duplicate critical descriptors */
1175 if (desc->fip_dtype < 32) {
1176 if ((desc->fip_dtype != FIP_DT_MAC) &&
1177 (desc_mask & 1U << desc->fip_dtype)) {
1178 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1179 "Descriptors in FIP ELS\n");
1180 goto drop;
1181 }
1182 desc_mask |= (1 << desc->fip_dtype);
1183 }
1184 switch (desc->fip_dtype) {
1185 case FIP_DT_MAC:
1186 sel = fip->sel_fcf;
1187 if (desc_cnt == 1) {
1188 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1189 "received out of order\n");
1190 goto drop;
1191 }
1192 /*
1193 * Some switch implementations send two MAC descriptors,
1194 * with first MAC(granted_mac) being the FPMA, and the
1195 * second one(fcoe_mac) is used as destination address
1196 * for sending/receiving FCoE packets. FIP traffic is
1197 * sent using fip_mac. For regular switches, both
1198 * fip_mac and fcoe_mac would be the same.
1199 */
1200 if (desc_cnt == 2)
1201 memcpy(granted_mac,
1202 ((struct fip_mac_desc *)desc)->fd_mac,
1203 ETH_ALEN);
1204
1205 if (dlen != sizeof(struct fip_mac_desc))
1206 goto len_err;
1207
1208 if ((desc_cnt == 3) && (sel))
1209 memcpy(sel->fcoe_mac,
1210 ((struct fip_mac_desc *)desc)->fd_mac,
1211 ETH_ALEN);
1212 break;
1213 case FIP_DT_FLOGI:
1214 case FIP_DT_FDISC:
1215 case FIP_DT_LOGO:
1216 case FIP_DT_ELP:
1217 if (desc_cnt != 1) {
1218 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1219 "received out of order\n");
1220 goto drop;
1221 }
1222 if (fh)
1223 goto drop;
1224 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1225 goto len_err;
1226 els_len = dlen - sizeof(*els);
1227 els = (struct fip_encaps *)desc;
1228 fh = (struct fc_frame_header *)(els + 1);
1229 els_dtype = desc->fip_dtype;
1230 break;
1231 default:
1232 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1233 "in FIP adv\n", desc->fip_dtype);
1234 /* standard says ignore unknown descriptors >= 128 */
1235 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1236 goto drop;
1237 if (desc_cnt <= 2) {
1238 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1239 "received out of order\n");
1240 goto drop;
1241 }
1242 break;
1243 }
1244 desc = (struct fip_desc *)((char *)desc + dlen);
1245 rlen -= dlen;
1246 }
1247
1248 if (!fh)
1249 goto drop;
1250 els_op = *(u8 *)(fh + 1);
1251
1252 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
1253 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
1254 if (els_op == ELS_LS_ACC) {
1255 if (!is_valid_ether_addr(granted_mac)) {
1256 LIBFCOE_FIP_DBG(fip,
1257 "Invalid MAC address %pM in FIP ELS\n",
1258 granted_mac);
1259 goto drop;
1260 }
1261 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1262
1263 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1264 fip->flogi_oxid = FC_XID_UNKNOWN;
1265 if (els_dtype == FIP_DT_FLOGI)
1266 fcoe_ctlr_announce(fip);
1267 }
1268 } else if (els_dtype == FIP_DT_FLOGI &&
1269 !fcoe_ctlr_flogi_retry(fip))
1270 goto drop; /* retrying FLOGI so drop reject */
1271 }
1272
1273 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
1274 (!(1U << FIP_DT_MAC & desc_mask)))) {
1275 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
1276 "in FIP ELS\n");
1277 goto drop;
1278 }
1279
1280 /*
1281 * Convert skb into an fc_frame containing only the ELS.
1282 */
1283 skb_pull(skb, (u8 *)fh - skb->data);
1284 skb_trim(skb, els_len);
1285 fp = (struct fc_frame *)skb;
1286 fc_frame_init(fp);
1287 fr_sof(fp) = FC_SOF_I3;
1288 fr_eof(fp) = FC_EOF_T;
1289 fr_dev(fp) = lport;
1290 fr_encaps(fp) = els_dtype;
1291
1292 stats = per_cpu_ptr(lport->stats, get_cpu());
1293 stats->RxFrames++;
1294 stats->RxWords += skb->len / FIP_BPW;
1295 put_cpu();
1296
1297 fc_exch_recv(lport, fp);
1298 return;
1299
1300 len_err:
1301 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1302 desc->fip_dtype, dlen);
1303 drop:
1304 kfree_skb(skb);
1305 }
1306
1307 /**
1308 * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
1309 * @fip: The FCoE controller that received the frame
1310 * @fh: The received FIP header
1311 *
1312 * There may be multiple VN_Port descriptors.
1313 * The overall length has already been checked.
1314 */
1315 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1316 struct fip_header *fh)
1317 {
1318 struct fip_desc *desc;
1319 struct fip_mac_desc *mp;
1320 struct fip_wwn_desc *wp;
1321 struct fip_vn_desc *vp;
1322 size_t rlen;
1323 size_t dlen;
1324 struct fcoe_fcf *fcf = fip->sel_fcf;
1325 struct fc_lport *lport = fip->lp;
1326 struct fc_lport *vn_port = NULL;
1327 u32 desc_mask;
1328 int num_vlink_desc;
1329 int reset_phys_port = 0;
1330 struct fip_vn_desc **vlink_desc_arr = NULL;
1331
1332 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1333
1334 if (!fcf || !lport->port_id) {
1335 /*
1336 * We are yet to select best FCF, but we got CVL in the
1337 * meantime. reset the ctlr and let it rediscover the FCF
1338 */
1339 mutex_lock(&fip->ctlr_mutex);
1340 fcoe_ctlr_reset(fip);
1341 mutex_unlock(&fip->ctlr_mutex);
1342 return;
1343 }
1344
1345 /*
1346 * mask of required descriptors. Validating each one clears its bit.
1347 */
1348 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
1349
1350 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1351 desc = (struct fip_desc *)(fh + 1);
1352
1353 /*
1354 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
1355 * before determining max Vx_Port descriptor but a buggy FCF could have
1356 * omited either or both MAC Address and Name Identifier descriptors
1357 */
1358 num_vlink_desc = rlen / sizeof(*vp);
1359 if (num_vlink_desc)
1360 vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc,
1361 GFP_ATOMIC);
1362 if (!vlink_desc_arr)
1363 return;
1364 num_vlink_desc = 0;
1365
1366 while (rlen >= sizeof(*desc)) {
1367 dlen = desc->fip_dlen * FIP_BPW;
1368 if (dlen > rlen)
1369 goto err;
1370 /* Drop CVL if there are duplicate critical descriptors */
1371 if ((desc->fip_dtype < 32) &&
1372 (desc->fip_dtype != FIP_DT_VN_ID) &&
1373 !(desc_mask & 1U << desc->fip_dtype)) {
1374 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1375 "Descriptors in FIP CVL\n");
1376 goto err;
1377 }
1378 switch (desc->fip_dtype) {
1379 case FIP_DT_MAC:
1380 mp = (struct fip_mac_desc *)desc;
1381 if (dlen < sizeof(*mp))
1382 goto err;
1383 if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
1384 goto err;
1385 desc_mask &= ~BIT(FIP_DT_MAC);
1386 break;
1387 case FIP_DT_NAME:
1388 wp = (struct fip_wwn_desc *)desc;
1389 if (dlen < sizeof(*wp))
1390 goto err;
1391 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1392 goto err;
1393 desc_mask &= ~BIT(FIP_DT_NAME);
1394 break;
1395 case FIP_DT_VN_ID:
1396 vp = (struct fip_vn_desc *)desc;
1397 if (dlen < sizeof(*vp))
1398 goto err;
1399 vlink_desc_arr[num_vlink_desc++] = vp;
1400 vn_port = fc_vport_id_lookup(lport,
1401 ntoh24(vp->fd_fc_id));
1402 if (vn_port && (vn_port == lport)) {
1403 mutex_lock(&fip->ctlr_mutex);
1404 per_cpu_ptr(lport->stats,
1405 get_cpu())->VLinkFailureCount++;
1406 put_cpu();
1407 fcoe_ctlr_reset(fip);
1408 mutex_unlock(&fip->ctlr_mutex);
1409 }
1410 break;
1411 default:
1412 /* standard says ignore unknown descriptors >= 128 */
1413 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1414 goto err;
1415 break;
1416 }
1417 desc = (struct fip_desc *)((char *)desc + dlen);
1418 rlen -= dlen;
1419 }
1420
1421 /*
1422 * reset only if all required descriptors were present and valid.
1423 */
1424 if (desc_mask)
1425 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1426 desc_mask);
1427 else if (!num_vlink_desc) {
1428 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
1429 /*
1430 * No Vx_Port description. Clear all NPIV ports,
1431 * followed by physical port
1432 */
1433 mutex_lock(&fip->ctlr_mutex);
1434 per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++;
1435 put_cpu();
1436 fcoe_ctlr_reset(fip);
1437 mutex_unlock(&fip->ctlr_mutex);
1438
1439 mutex_lock(&lport->lp_mutex);
1440 list_for_each_entry(vn_port, &lport->vports, list)
1441 fc_lport_reset(vn_port);
1442 mutex_unlock(&lport->lp_mutex);
1443
1444 fc_lport_reset(fip->lp);
1445 fcoe_ctlr_solicit(fip, NULL);
1446 } else {
1447 int i;
1448
1449 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1450 for (i = 0; i < num_vlink_desc; i++) {
1451 vp = vlink_desc_arr[i];
1452 vn_port = fc_vport_id_lookup(lport,
1453 ntoh24(vp->fd_fc_id));
1454 if (!vn_port)
1455 continue;
1456
1457 /*
1458 * 'port_id' is already validated, check MAC address and
1459 * wwpn
1460 */
1461 if (!ether_addr_equal(fip->get_src_addr(vn_port),
1462 vp->fd_mac) ||
1463 get_unaligned_be64(&vp->fd_wwpn) !=
1464 vn_port->wwpn)
1465 continue;
1466
1467 if (vn_port == lport)
1468 /*
1469 * Physical port, defer processing till all
1470 * listed NPIV ports are cleared
1471 */
1472 reset_phys_port = 1;
1473 else /* NPIV port */
1474 fc_lport_reset(vn_port);
1475 }
1476
1477 if (reset_phys_port) {
1478 fc_lport_reset(fip->lp);
1479 fcoe_ctlr_solicit(fip, NULL);
1480 }
1481 }
1482
1483 err:
1484 kfree(vlink_desc_arr);
1485 }
1486
1487 /**
1488 * fcoe_ctlr_recv() - Receive a FIP packet
1489 * @fip: The FCoE controller that received the packet
1490 * @skb: The received FIP packet
1491 *
1492 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1493 */
1494 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1495 {
1496 skb = skb_share_check(skb, GFP_ATOMIC);
1497 if (!skb)
1498 return;
1499 skb_queue_tail(&fip->fip_recv_list, skb);
1500 schedule_work(&fip->recv_work);
1501 }
1502 EXPORT_SYMBOL(fcoe_ctlr_recv);
1503
1504 /**
1505 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1506 * @fip: The FCoE controller that received the frame
1507 * @skb: The received FIP frame
1508 *
1509 * Returns non-zero if the frame is dropped.
1510 */
1511 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1512 {
1513 struct fip_header *fiph;
1514 struct ethhdr *eh;
1515 enum fip_state state;
1516 u16 op;
1517 u8 sub;
1518
1519 if (skb_linearize(skb))
1520 goto drop;
1521 if (skb->len < sizeof(*fiph))
1522 goto drop;
1523 eh = eth_hdr(skb);
1524 if (fip->mode == FIP_MODE_VN2VN) {
1525 if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1526 !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
1527 !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
1528 goto drop;
1529 } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1530 !ether_addr_equal(eh->h_dest, fcoe_all_enode))
1531 goto drop;
1532 fiph = (struct fip_header *)skb->data;
1533 op = ntohs(fiph->fip_op);
1534 sub = fiph->fip_subcode;
1535
1536 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1537 goto drop;
1538 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1539 goto drop;
1540
1541 mutex_lock(&fip->ctlr_mutex);
1542 state = fip->state;
1543 if (state == FIP_ST_AUTO) {
1544 fip->map_dest = 0;
1545 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1546 state = FIP_ST_ENABLED;
1547 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1548 }
1549 mutex_unlock(&fip->ctlr_mutex);
1550
1551 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1552 return fcoe_ctlr_vn_recv(fip, skb);
1553
1554 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1555 state != FIP_ST_VNMP_CLAIM)
1556 goto drop;
1557
1558 if (op == FIP_OP_LS) {
1559 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1560 return 0;
1561 }
1562
1563 if (state != FIP_ST_ENABLED)
1564 goto drop;
1565
1566 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1567 fcoe_ctlr_recv_adv(fip, skb);
1568 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1569 fcoe_ctlr_recv_clr_vlink(fip, fiph);
1570 kfree_skb(skb);
1571 return 0;
1572 drop:
1573 kfree_skb(skb);
1574 return -1;
1575 }
1576
1577 /**
1578 * fcoe_ctlr_select() - Select the best FCF (if possible)
1579 * @fip: The FCoE controller
1580 *
1581 * Returns the selected FCF, or NULL if none are usable.
1582 *
1583 * If there are conflicting advertisements, no FCF can be chosen.
1584 *
1585 * If there is already a selected FCF, this will choose a better one or
1586 * an equivalent one that hasn't already been sent a FLOGI.
1587 *
1588 * Called with lock held.
1589 */
1590 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1591 {
1592 struct fcoe_fcf *fcf;
1593 struct fcoe_fcf *best = fip->sel_fcf;
1594
1595 list_for_each_entry(fcf, &fip->fcfs, list) {
1596 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1597 "VFID %d mac %pM map %x val %d "
1598 "sent %u pri %u\n",
1599 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1600 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1601 fcf->flogi_sent, fcf->pri);
1602 if (!fcoe_ctlr_fcf_usable(fcf)) {
1603 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1604 "map %x %svalid %savailable\n",
1605 fcf->fabric_name, fcf->fc_map,
1606 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1607 (fcf->flags & FIP_FL_AVAIL) ?
1608 "" : "un");
1609 continue;
1610 }
1611 if (!best || fcf->pri < best->pri || best->flogi_sent)
1612 best = fcf;
1613 if (fcf->fabric_name != best->fabric_name ||
1614 fcf->vfid != best->vfid ||
1615 fcf->fc_map != best->fc_map) {
1616 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1617 "or FC-MAP\n");
1618 return NULL;
1619 }
1620 }
1621 fip->sel_fcf = best;
1622 if (best) {
1623 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1624 fip->port_ka_time = jiffies +
1625 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1626 fip->ctlr_ka_time = jiffies + best->fka_period;
1627 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1628 mod_timer(&fip->timer, fip->ctlr_ka_time);
1629 }
1630 return best;
1631 }
1632
1633 /**
1634 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1635 * @fip: The FCoE controller
1636 *
1637 * Returns non-zero error if it could not be sent.
1638 *
1639 * Called with ctlr_mutex and ctlr_lock held.
1640 * Caller must verify that fip->sel_fcf is not NULL.
1641 */
1642 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1643 {
1644 struct sk_buff *skb;
1645 struct sk_buff *skb_orig;
1646 struct fc_frame_header *fh;
1647 int error;
1648
1649 skb_orig = fip->flogi_req;
1650 if (!skb_orig)
1651 return -EINVAL;
1652
1653 /*
1654 * Clone and send the FLOGI request. If clone fails, use original.
1655 */
1656 skb = skb_clone(skb_orig, GFP_ATOMIC);
1657 if (!skb) {
1658 skb = skb_orig;
1659 fip->flogi_req = NULL;
1660 }
1661 fh = (struct fc_frame_header *)skb->data;
1662 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1663 ntoh24(fh->fh_d_id));
1664 if (error) {
1665 kfree_skb(skb);
1666 return error;
1667 }
1668 fip->send(fip, skb);
1669 fip->sel_fcf->flogi_sent = 1;
1670 return 0;
1671 }
1672
1673 /**
1674 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1675 * @fip: The FCoE controller
1676 *
1677 * Returns non-zero error code if there's no FLOGI request to retry or
1678 * no alternate FCF available.
1679 */
1680 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1681 {
1682 struct fcoe_fcf *fcf;
1683 int error;
1684
1685 mutex_lock(&fip->ctlr_mutex);
1686 spin_lock_bh(&fip->ctlr_lock);
1687 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1688 fcf = fcoe_ctlr_select(fip);
1689 if (!fcf || fcf->flogi_sent) {
1690 kfree_skb(fip->flogi_req);
1691 fip->flogi_req = NULL;
1692 error = -ENOENT;
1693 } else {
1694 fcoe_ctlr_solicit(fip, NULL);
1695 error = fcoe_ctlr_flogi_send_locked(fip);
1696 }
1697 spin_unlock_bh(&fip->ctlr_lock);
1698 mutex_unlock(&fip->ctlr_mutex);
1699 return error;
1700 }
1701
1702
1703 /**
1704 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1705 * @fip: The FCoE controller that timed out
1706 *
1707 * Done here because fcoe_ctlr_els_send() can't get mutex.
1708 *
1709 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1710 */
1711 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1712 {
1713 struct fcoe_fcf *fcf;
1714
1715 spin_lock_bh(&fip->ctlr_lock);
1716 fcf = fip->sel_fcf;
1717 if (!fcf || !fip->flogi_req_send)
1718 goto unlock;
1719
1720 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1721
1722 /*
1723 * If this FLOGI is being sent due to a timeout retry
1724 * to the same FCF as before, select a different FCF if possible.
1725 */
1726 if (fcf->flogi_sent) {
1727 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1728 fcf = fcoe_ctlr_select(fip);
1729 if (!fcf || fcf->flogi_sent) {
1730 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1731 list_for_each_entry(fcf, &fip->fcfs, list)
1732 fcf->flogi_sent = 0;
1733 fcf = fcoe_ctlr_select(fip);
1734 }
1735 }
1736 if (fcf) {
1737 fcoe_ctlr_flogi_send_locked(fip);
1738 fip->flogi_req_send = 0;
1739 } else /* XXX */
1740 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1741 unlock:
1742 spin_unlock_bh(&fip->ctlr_lock);
1743 }
1744
1745 /**
1746 * fcoe_ctlr_timeout() - FIP timeout handler
1747 * @arg: The FCoE controller that timed out
1748 */
1749 static void fcoe_ctlr_timeout(unsigned long arg)
1750 {
1751 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1752
1753 schedule_work(&fip->timer_work);
1754 }
1755
1756 /**
1757 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1758 * @work: Handle to a FCoE controller
1759 *
1760 * Ages FCFs. Triggers FCF selection if possible.
1761 * Sends keep-alives and resets.
1762 */
1763 static void fcoe_ctlr_timer_work(struct work_struct *work)
1764 {
1765 struct fcoe_ctlr *fip;
1766 struct fc_lport *vport;
1767 u8 *mac;
1768 u8 reset = 0;
1769 u8 send_ctlr_ka = 0;
1770 u8 send_port_ka = 0;
1771 struct fcoe_fcf *sel;
1772 struct fcoe_fcf *fcf;
1773 unsigned long next_timer;
1774
1775 fip = container_of(work, struct fcoe_ctlr, timer_work);
1776 if (fip->mode == FIP_MODE_VN2VN)
1777 return fcoe_ctlr_vn_timeout(fip);
1778 mutex_lock(&fip->ctlr_mutex);
1779 if (fip->state == FIP_ST_DISABLED) {
1780 mutex_unlock(&fip->ctlr_mutex);
1781 return;
1782 }
1783
1784 fcf = fip->sel_fcf;
1785 next_timer = fcoe_ctlr_age_fcfs(fip);
1786
1787 sel = fip->sel_fcf;
1788 if (!sel && fip->sel_time) {
1789 if (time_after_eq(jiffies, fip->sel_time)) {
1790 sel = fcoe_ctlr_select(fip);
1791 fip->sel_time = 0;
1792 } else if (time_after(next_timer, fip->sel_time))
1793 next_timer = fip->sel_time;
1794 }
1795
1796 if (sel && fip->flogi_req_send)
1797 fcoe_ctlr_flogi_send(fip);
1798 else if (!sel && fcf)
1799 reset = 1;
1800
1801 if (sel && !sel->fd_flags) {
1802 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1803 fip->ctlr_ka_time = jiffies + sel->fka_period;
1804 send_ctlr_ka = 1;
1805 }
1806 if (time_after(next_timer, fip->ctlr_ka_time))
1807 next_timer = fip->ctlr_ka_time;
1808
1809 if (time_after_eq(jiffies, fip->port_ka_time)) {
1810 fip->port_ka_time = jiffies +
1811 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1812 send_port_ka = 1;
1813 }
1814 if (time_after(next_timer, fip->port_ka_time))
1815 next_timer = fip->port_ka_time;
1816 }
1817 if (!list_empty(&fip->fcfs))
1818 mod_timer(&fip->timer, next_timer);
1819 mutex_unlock(&fip->ctlr_mutex);
1820
1821 if (reset) {
1822 fc_lport_reset(fip->lp);
1823 /* restart things with a solicitation */
1824 fcoe_ctlr_solicit(fip, NULL);
1825 }
1826
1827 if (send_ctlr_ka)
1828 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1829
1830 if (send_port_ka) {
1831 mutex_lock(&fip->lp->lp_mutex);
1832 mac = fip->get_src_addr(fip->lp);
1833 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1834 list_for_each_entry(vport, &fip->lp->vports, list) {
1835 mac = fip->get_src_addr(vport);
1836 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1837 }
1838 mutex_unlock(&fip->lp->lp_mutex);
1839 }
1840 }
1841
1842 /**
1843 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1844 * @recv_work: Handle to a FCoE controller
1845 */
1846 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1847 {
1848 struct fcoe_ctlr *fip;
1849 struct sk_buff *skb;
1850
1851 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1852 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1853 fcoe_ctlr_recv_handler(fip, skb);
1854 }
1855
1856 /**
1857 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1858 * @fip: The FCoE controller
1859 * @fp: The FC frame to snoop
1860 *
1861 * Snoop potential response to FLOGI or even incoming FLOGI.
1862 *
1863 * The caller has checked that we are waiting for login as indicated
1864 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1865 *
1866 * The caller is responsible for freeing the frame.
1867 * Fill in the granted_mac address.
1868 *
1869 * Return non-zero if the frame should not be delivered to libfc.
1870 */
1871 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1872 struct fc_frame *fp)
1873 {
1874 struct fc_frame_header *fh;
1875 u8 op;
1876 u8 *sa;
1877
1878 sa = eth_hdr(&fp->skb)->h_source;
1879 fh = fc_frame_header_get(fp);
1880 if (fh->fh_type != FC_TYPE_ELS)
1881 return 0;
1882
1883 op = fc_frame_payload_op(fp);
1884 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1885 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1886
1887 mutex_lock(&fip->ctlr_mutex);
1888 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1889 mutex_unlock(&fip->ctlr_mutex);
1890 return -EINVAL;
1891 }
1892 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1893 LIBFCOE_FIP_DBG(fip,
1894 "received FLOGI LS_ACC using non-FIP mode\n");
1895
1896 /*
1897 * FLOGI accepted.
1898 * If the src mac addr is FC_OUI-based, then we mark the
1899 * address_mode flag to use FC_OUI-based Ethernet DA.
1900 * Otherwise we use the FCoE gateway addr
1901 */
1902 if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1903 fcoe_ctlr_map_dest(fip);
1904 } else {
1905 memcpy(fip->dest_addr, sa, ETH_ALEN);
1906 fip->map_dest = 0;
1907 }
1908 fip->flogi_oxid = FC_XID_UNKNOWN;
1909 mutex_unlock(&fip->ctlr_mutex);
1910 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1911 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1912 /*
1913 * Save source MAC for point-to-point responses.
1914 */
1915 mutex_lock(&fip->ctlr_mutex);
1916 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1917 memcpy(fip->dest_addr, sa, ETH_ALEN);
1918 fip->map_dest = 0;
1919 if (fip->state == FIP_ST_AUTO)
1920 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1921 "Setting non-FIP mode\n");
1922 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1923 }
1924 mutex_unlock(&fip->ctlr_mutex);
1925 }
1926 return 0;
1927 }
1928 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1929
1930 /**
1931 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1932 * @mac: The MAC address to convert
1933 * @scheme: The scheme to use when converting
1934 * @port: The port indicator for converting
1935 *
1936 * Returns: u64 fc world wide name
1937 */
1938 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1939 unsigned int scheme, unsigned int port)
1940 {
1941 u64 wwn;
1942 u64 host_mac;
1943
1944 /* The MAC is in NO, so flip only the low 48 bits */
1945 host_mac = ((u64) mac[0] << 40) |
1946 ((u64) mac[1] << 32) |
1947 ((u64) mac[2] << 24) |
1948 ((u64) mac[3] << 16) |
1949 ((u64) mac[4] << 8) |
1950 (u64) mac[5];
1951
1952 WARN_ON(host_mac >= (1ULL << 48));
1953 wwn = host_mac | ((u64) scheme << 60);
1954 switch (scheme) {
1955 case 1:
1956 WARN_ON(port != 0);
1957 break;
1958 case 2:
1959 WARN_ON(port >= 0xfff);
1960 wwn |= (u64) port << 48;
1961 break;
1962 default:
1963 WARN_ON(1);
1964 break;
1965 }
1966
1967 return wwn;
1968 }
1969 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1970
1971 /**
1972 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1973 * @rdata: libfc remote port
1974 */
1975 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1976 {
1977 return (struct fcoe_rport *)(rdata + 1);
1978 }
1979
1980 /**
1981 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
1982 * @fip: The FCoE controller
1983 * @sub: sub-opcode for probe request, reply, or advertisement.
1984 * @dest: The destination Ethernet MAC address
1985 * @min_len: minimum size of the Ethernet payload to be sent
1986 */
1987 static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
1988 enum fip_vn2vn_subcode sub,
1989 const u8 *dest, size_t min_len)
1990 {
1991 struct sk_buff *skb;
1992 struct fip_frame {
1993 struct ethhdr eth;
1994 struct fip_header fip;
1995 struct fip_mac_desc mac;
1996 struct fip_wwn_desc wwnn;
1997 struct fip_vn_desc vn;
1998 } __packed * frame;
1999 struct fip_fc4_feat *ff;
2000 struct fip_size_desc *size;
2001 u32 fcp_feat;
2002 size_t len;
2003 size_t dlen;
2004
2005 len = sizeof(*frame);
2006 dlen = 0;
2007 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2008 dlen = sizeof(struct fip_fc4_feat) +
2009 sizeof(struct fip_size_desc);
2010 len += dlen;
2011 }
2012 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
2013 len = max(len, min_len + sizeof(struct ethhdr));
2014
2015 skb = dev_alloc_skb(len);
2016 if (!skb)
2017 return;
2018
2019 frame = (struct fip_frame *)skb->data;
2020 memset(frame, 0, len);
2021 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2022
2023 if (sub == FIP_SC_VN_BEACON) {
2024 hton24(frame->eth.h_source, FIP_VN_FC_MAP);
2025 hton24(frame->eth.h_source + 3, fip->port_id);
2026 } else {
2027 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2028 }
2029 frame->eth.h_proto = htons(ETH_P_FIP);
2030
2031 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2032 frame->fip.fip_op = htons(FIP_OP_VN2VN);
2033 frame->fip.fip_subcode = sub;
2034 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2035
2036 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2037 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2038 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2039
2040 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
2041 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
2042 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
2043
2044 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
2045 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
2046 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
2047 hton24(frame->vn.fd_mac + 3, fip->port_id);
2048 hton24(frame->vn.fd_fc_id, fip->port_id);
2049 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
2050
2051 /*
2052 * For claims, add FC-4 features.
2053 * TBD: Add interface to get fc-4 types and features from libfc.
2054 */
2055 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2056 ff = (struct fip_fc4_feat *)(frame + 1);
2057 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
2058 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
2059 ff->fd_fts = fip->lp->fcts;
2060
2061 fcp_feat = 0;
2062 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
2063 fcp_feat |= FCP_FEAT_INIT;
2064 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
2065 fcp_feat |= FCP_FEAT_TARG;
2066 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
2067 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
2068
2069 size = (struct fip_size_desc *)(ff + 1);
2070 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
2071 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
2072 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
2073 }
2074
2075 skb_put(skb, len);
2076 skb->protocol = htons(ETH_P_FIP);
2077 skb->priority = fip->priority;
2078 skb_reset_mac_header(skb);
2079 skb_reset_network_header(skb);
2080
2081 fip->send(fip, skb);
2082 }
2083
2084 /**
2085 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
2086 * @lport: The lport which is receiving the event
2087 * @rdata: remote port private data
2088 * @event: The event that occurred
2089 *
2090 * Locking Note: The rport lock must not be held when calling this function.
2091 */
2092 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
2093 struct fc_rport_priv *rdata,
2094 enum fc_rport_event event)
2095 {
2096 struct fcoe_ctlr *fip = lport->disc.priv;
2097 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2098
2099 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
2100 rdata->ids.port_id, event);
2101
2102 mutex_lock(&fip->ctlr_mutex);
2103 switch (event) {
2104 case RPORT_EV_READY:
2105 frport->login_count = 0;
2106 break;
2107 case RPORT_EV_LOGO:
2108 case RPORT_EV_FAILED:
2109 case RPORT_EV_STOP:
2110 frport->login_count++;
2111 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
2112 LIBFCOE_FIP_DBG(fip,
2113 "rport FLOGI limited port_id %6.6x\n",
2114 rdata->ids.port_id);
2115 lport->tt.rport_logoff(rdata);
2116 }
2117 break;
2118 default:
2119 break;
2120 }
2121 mutex_unlock(&fip->ctlr_mutex);
2122 }
2123
2124 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
2125 .event_callback = fcoe_ctlr_vn_rport_callback,
2126 };
2127
2128 /**
2129 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
2130 * @fip: The FCoE controller
2131 *
2132 * Called with ctlr_mutex held.
2133 */
2134 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
2135 {
2136 struct fc_rport_priv *rdata;
2137
2138 mutex_lock(&lport->disc.disc_mutex);
2139 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers)
2140 lport->tt.rport_logoff(rdata);
2141 lport->disc.disc_callback = NULL;
2142 mutex_unlock(&lport->disc.disc_mutex);
2143 }
2144
2145 /**
2146 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
2147 * @fip: The FCoE controller
2148 *
2149 * Called through the local port template for discovery.
2150 * Called without the ctlr_mutex held.
2151 */
2152 static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
2153 {
2154 struct fcoe_ctlr *fip = lport->disc.priv;
2155
2156 mutex_lock(&fip->ctlr_mutex);
2157 fcoe_ctlr_disc_stop_locked(lport);
2158 mutex_unlock(&fip->ctlr_mutex);
2159 }
2160
2161 /**
2162 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
2163 * @fip: The FCoE controller
2164 *
2165 * Called through the local port template for discovery.
2166 * Called without the ctlr_mutex held.
2167 */
2168 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
2169 {
2170 fcoe_ctlr_disc_stop(lport);
2171 lport->tt.rport_flush_queue();
2172 synchronize_rcu();
2173 }
2174
2175 /**
2176 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
2177 * @fip: The FCoE controller
2178 *
2179 * Called with fcoe_ctlr lock held.
2180 */
2181 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
2182 {
2183 unsigned long wait;
2184 u32 port_id;
2185
2186 fcoe_ctlr_disc_stop_locked(fip->lp);
2187
2188 /*
2189 * Get proposed port ID.
2190 * If this is the first try after link up, use any previous port_id.
2191 * If there was none, use the low bits of the port_name.
2192 * On subsequent tries, get the next random one.
2193 * Don't use reserved IDs, use another non-zero value, just as random.
2194 */
2195 port_id = fip->port_id;
2196 if (fip->probe_tries)
2197 port_id = prandom_u32_state(&fip->rnd_state) & 0xffff;
2198 else if (!port_id)
2199 port_id = fip->lp->wwpn & 0xffff;
2200 if (!port_id || port_id == 0xffff)
2201 port_id = 1;
2202 fip->port_id = port_id;
2203
2204 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
2205 fip->probe_tries++;
2206 wait = prandom_u32() % FIP_VN_PROBE_WAIT;
2207 } else
2208 wait = FIP_VN_RLIM_INT;
2209 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
2210 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
2211 }
2212
2213 /**
2214 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2215 * @fip: The FCoE controller
2216 *
2217 * Called with fcoe_ctlr lock held.
2218 */
2219 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2220 {
2221 fip->probe_tries = 0;
2222 prandom_seed_state(&fip->rnd_state, fip->lp->wwpn);
2223 fcoe_ctlr_vn_restart(fip);
2224 }
2225
2226 /**
2227 * fcoe_ctlr_vn_parse - parse probe request or response
2228 * @fip: The FCoE controller
2229 * @skb: incoming packet
2230 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
2231 *
2232 * Returns non-zero error number on error.
2233 * Does not consume the packet.
2234 */
2235 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2236 struct sk_buff *skb,
2237 struct fc_rport_priv *rdata)
2238 {
2239 struct fip_header *fiph;
2240 struct fip_desc *desc = NULL;
2241 struct fip_mac_desc *macd = NULL;
2242 struct fip_wwn_desc *wwn = NULL;
2243 struct fip_vn_desc *vn = NULL;
2244 struct fip_size_desc *size = NULL;
2245 struct fcoe_rport *frport;
2246 size_t rlen;
2247 size_t dlen;
2248 u32 desc_mask = 0;
2249 u32 dtype;
2250 u8 sub;
2251
2252 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2253 frport = fcoe_ctlr_rport(rdata);
2254
2255 fiph = (struct fip_header *)skb->data;
2256 frport->flags = ntohs(fiph->fip_flags);
2257
2258 sub = fiph->fip_subcode;
2259 switch (sub) {
2260 case FIP_SC_VN_PROBE_REQ:
2261 case FIP_SC_VN_PROBE_REP:
2262 case FIP_SC_VN_BEACON:
2263 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2264 BIT(FIP_DT_VN_ID);
2265 break;
2266 case FIP_SC_VN_CLAIM_NOTIFY:
2267 case FIP_SC_VN_CLAIM_REP:
2268 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2269 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2270 BIT(FIP_DT_FCOE_SIZE);
2271 break;
2272 default:
2273 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2274 return -EINVAL;
2275 }
2276
2277 rlen = ntohs(fiph->fip_dl_len) * 4;
2278 if (rlen + sizeof(*fiph) > skb->len)
2279 return -EINVAL;
2280
2281 desc = (struct fip_desc *)(fiph + 1);
2282 while (rlen > 0) {
2283 dlen = desc->fip_dlen * FIP_BPW;
2284 if (dlen < sizeof(*desc) || dlen > rlen)
2285 return -EINVAL;
2286
2287 dtype = desc->fip_dtype;
2288 if (dtype < 32) {
2289 if (!(desc_mask & BIT(dtype))) {
2290 LIBFCOE_FIP_DBG(fip,
2291 "unexpected or duplicated desc "
2292 "desc type %u in "
2293 "FIP VN2VN subtype %u\n",
2294 dtype, sub);
2295 return -EINVAL;
2296 }
2297 desc_mask &= ~BIT(dtype);
2298 }
2299
2300 switch (dtype) {
2301 case FIP_DT_MAC:
2302 if (dlen != sizeof(struct fip_mac_desc))
2303 goto len_err;
2304 macd = (struct fip_mac_desc *)desc;
2305 if (!is_valid_ether_addr(macd->fd_mac)) {
2306 LIBFCOE_FIP_DBG(fip,
2307 "Invalid MAC addr %pM in FIP VN2VN\n",
2308 macd->fd_mac);
2309 return -EINVAL;
2310 }
2311 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2312 break;
2313 case FIP_DT_NAME:
2314 if (dlen != sizeof(struct fip_wwn_desc))
2315 goto len_err;
2316 wwn = (struct fip_wwn_desc *)desc;
2317 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2318 break;
2319 case FIP_DT_VN_ID:
2320 if (dlen != sizeof(struct fip_vn_desc))
2321 goto len_err;
2322 vn = (struct fip_vn_desc *)desc;
2323 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2324 rdata->ids.port_id = ntoh24(vn->fd_fc_id);
2325 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
2326 break;
2327 case FIP_DT_FC4F:
2328 if (dlen != sizeof(struct fip_fc4_feat))
2329 goto len_err;
2330 break;
2331 case FIP_DT_FCOE_SIZE:
2332 if (dlen != sizeof(struct fip_size_desc))
2333 goto len_err;
2334 size = (struct fip_size_desc *)desc;
2335 frport->fcoe_len = ntohs(size->fd_size);
2336 break;
2337 default:
2338 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2339 "in FIP probe\n", dtype);
2340 /* standard says ignore unknown descriptors >= 128 */
2341 if (dtype < FIP_DT_VENDOR_BASE)
2342 return -EINVAL;
2343 break;
2344 }
2345 desc = (struct fip_desc *)((char *)desc + dlen);
2346 rlen -= dlen;
2347 }
2348 return 0;
2349
2350 len_err:
2351 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2352 dtype, dlen);
2353 return -EINVAL;
2354 }
2355
2356 /**
2357 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2358 * @fip: The FCoE controller
2359 *
2360 * Called with ctlr_mutex held.
2361 */
2362 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2363 {
2364 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2365 fip->sol_time = jiffies;
2366 }
2367
2368 /**
2369 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2370 * @fip: The FCoE controller
2371 * @rdata: parsed remote port with frport from the probe request
2372 *
2373 * Called with ctlr_mutex held.
2374 */
2375 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2376 struct fc_rport_priv *rdata)
2377 {
2378 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2379
2380 if (rdata->ids.port_id != fip->port_id)
2381 return;
2382
2383 switch (fip->state) {
2384 case FIP_ST_VNMP_CLAIM:
2385 case FIP_ST_VNMP_UP:
2386 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2387 frport->enode_mac, 0);
2388 break;
2389 case FIP_ST_VNMP_PROBE1:
2390 case FIP_ST_VNMP_PROBE2:
2391 /*
2392 * Decide whether to reply to the Probe.
2393 * Our selected address is never a "recorded" one, so
2394 * only reply if our WWPN is greater and the
2395 * Probe's REC bit is not set.
2396 * If we don't reply, we will change our address.
2397 */
2398 if (fip->lp->wwpn > rdata->ids.port_name &&
2399 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2400 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2401 frport->enode_mac, 0);
2402 break;
2403 }
2404 /* fall through */
2405 case FIP_ST_VNMP_START:
2406 fcoe_ctlr_vn_restart(fip);
2407 break;
2408 default:
2409 break;
2410 }
2411 }
2412
2413 /**
2414 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2415 * @fip: The FCoE controller
2416 * @rdata: parsed remote port with frport from the probe request
2417 *
2418 * Called with ctlr_mutex held.
2419 */
2420 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2421 struct fc_rport_priv *rdata)
2422 {
2423 if (rdata->ids.port_id != fip->port_id)
2424 return;
2425 switch (fip->state) {
2426 case FIP_ST_VNMP_START:
2427 case FIP_ST_VNMP_PROBE1:
2428 case FIP_ST_VNMP_PROBE2:
2429 case FIP_ST_VNMP_CLAIM:
2430 fcoe_ctlr_vn_restart(fip);
2431 break;
2432 case FIP_ST_VNMP_UP:
2433 fcoe_ctlr_vn_send_claim(fip);
2434 break;
2435 default:
2436 break;
2437 }
2438 }
2439
2440 /**
2441 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2442 * @fip: The FCoE controller
2443 * @new: newly-parsed remote port with frport as a template for new rdata
2444 *
2445 * Called with ctlr_mutex held.
2446 */
2447 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
2448 {
2449 struct fc_lport *lport = fip->lp;
2450 struct fc_rport_priv *rdata;
2451 struct fc_rport_identifiers *ids;
2452 struct fcoe_rport *frport;
2453 u32 port_id;
2454
2455 port_id = new->ids.port_id;
2456 if (port_id == fip->port_id)
2457 return;
2458
2459 mutex_lock(&lport->disc.disc_mutex);
2460 rdata = lport->tt.rport_create(lport, port_id);
2461 if (!rdata) {
2462 mutex_unlock(&lport->disc.disc_mutex);
2463 return;
2464 }
2465
2466 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2467 rdata->disc_id = lport->disc.disc_id;
2468
2469 ids = &rdata->ids;
2470 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
2471 (ids->node_name != -1 && ids->node_name != new->ids.node_name))
2472 lport->tt.rport_logoff(rdata);
2473 ids->port_name = new->ids.port_name;
2474 ids->node_name = new->ids.node_name;
2475 mutex_unlock(&lport->disc.disc_mutex);
2476
2477 frport = fcoe_ctlr_rport(rdata);
2478 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
2479 port_id, frport->fcoe_len ? "old" : "new");
2480 *frport = *fcoe_ctlr_rport(new);
2481 frport->time = 0;
2482 }
2483
2484 /**
2485 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2486 * @fip: The FCoE controller
2487 * @port_id: The port_id of the remote VN_node
2488 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2489 *
2490 * Returns non-zero error if no remote port found.
2491 */
2492 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2493 {
2494 struct fc_lport *lport = fip->lp;
2495 struct fc_rport_priv *rdata;
2496 struct fcoe_rport *frport;
2497 int ret = -1;
2498
2499 rcu_read_lock();
2500 rdata = lport->tt.rport_lookup(lport, port_id);
2501 if (rdata) {
2502 frport = fcoe_ctlr_rport(rdata);
2503 memcpy(mac, frport->enode_mac, ETH_ALEN);
2504 ret = 0;
2505 }
2506 rcu_read_unlock();
2507 return ret;
2508 }
2509
2510 /**
2511 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2512 * @fip: The FCoE controller
2513 * @new: newly-parsed remote port with frport as a template for new rdata
2514 *
2515 * Called with ctlr_mutex held.
2516 */
2517 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2518 struct fc_rport_priv *new)
2519 {
2520 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
2521
2522 if (frport->flags & FIP_FL_REC_OR_P2P) {
2523 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2524 return;
2525 }
2526 switch (fip->state) {
2527 case FIP_ST_VNMP_START:
2528 case FIP_ST_VNMP_PROBE1:
2529 case FIP_ST_VNMP_PROBE2:
2530 if (new->ids.port_id == fip->port_id)
2531 fcoe_ctlr_vn_restart(fip);
2532 break;
2533 case FIP_ST_VNMP_CLAIM:
2534 case FIP_ST_VNMP_UP:
2535 if (new->ids.port_id == fip->port_id) {
2536 if (new->ids.port_name > fip->lp->wwpn) {
2537 fcoe_ctlr_vn_restart(fip);
2538 break;
2539 }
2540 fcoe_ctlr_vn_send_claim(fip);
2541 break;
2542 }
2543 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
2544 min((u32)frport->fcoe_len,
2545 fcoe_ctlr_fcoe_size(fip)));
2546 fcoe_ctlr_vn_add(fip, new);
2547 break;
2548 default:
2549 break;
2550 }
2551 }
2552
2553 /**
2554 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2555 * @fip: The FCoE controller that received the frame
2556 * @new: newly-parsed remote port with frport from the Claim Response
2557 *
2558 * Called with ctlr_mutex held.
2559 */
2560 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2561 struct fc_rport_priv *new)
2562 {
2563 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2564 new->ids.port_id, fcoe_ctlr_state(fip->state));
2565 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2566 fcoe_ctlr_vn_add(fip, new);
2567 }
2568
2569 /**
2570 * fcoe_ctlr_vn_beacon() - handle received beacon.
2571 * @fip: The FCoE controller that received the frame
2572 * @new: newly-parsed remote port with frport from the Beacon
2573 *
2574 * Called with ctlr_mutex held.
2575 */
2576 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2577 struct fc_rport_priv *new)
2578 {
2579 struct fc_lport *lport = fip->lp;
2580 struct fc_rport_priv *rdata;
2581 struct fcoe_rport *frport;
2582
2583 frport = fcoe_ctlr_rport(new);
2584 if (frport->flags & FIP_FL_REC_OR_P2P) {
2585 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2586 return;
2587 }
2588 mutex_lock(&lport->disc.disc_mutex);
2589 rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
2590 if (rdata)
2591 kref_get(&rdata->kref);
2592 mutex_unlock(&lport->disc.disc_mutex);
2593 if (rdata) {
2594 if (rdata->ids.node_name == new->ids.node_name &&
2595 rdata->ids.port_name == new->ids.port_name) {
2596 frport = fcoe_ctlr_rport(rdata);
2597 if (!frport->time && fip->state == FIP_ST_VNMP_UP)
2598 lport->tt.rport_login(rdata);
2599 frport->time = jiffies;
2600 }
2601 kref_put(&rdata->kref, lport->tt.rport_destroy);
2602 return;
2603 }
2604 if (fip->state != FIP_ST_VNMP_UP)
2605 return;
2606
2607 /*
2608 * Beacon from a new neighbor.
2609 * Send a claim notify if one hasn't been sent recently.
2610 * Don't add the neighbor yet.
2611 */
2612 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2613 new->ids.port_id);
2614 if (time_after(jiffies,
2615 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2616 fcoe_ctlr_vn_send_claim(fip);
2617 }
2618
2619 /**
2620 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2621 * @fip: The FCoE controller
2622 *
2623 * Called with ctlr_mutex held.
2624 * Called only in state FIP_ST_VNMP_UP.
2625 * Returns the soonest time for next age-out or a time far in the future.
2626 */
2627 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2628 {
2629 struct fc_lport *lport = fip->lp;
2630 struct fc_rport_priv *rdata;
2631 struct fcoe_rport *frport;
2632 unsigned long next_time;
2633 unsigned long deadline;
2634
2635 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2636 mutex_lock(&lport->disc.disc_mutex);
2637 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2638 frport = fcoe_ctlr_rport(rdata);
2639 if (!frport->time)
2640 continue;
2641 deadline = frport->time +
2642 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2643 if (time_after_eq(jiffies, deadline)) {
2644 frport->time = 0;
2645 LIBFCOE_FIP_DBG(fip,
2646 "port %16.16llx fc_id %6.6x beacon expired\n",
2647 rdata->ids.port_name, rdata->ids.port_id);
2648 lport->tt.rport_logoff(rdata);
2649 } else if (time_before(deadline, next_time))
2650 next_time = deadline;
2651 }
2652 mutex_unlock(&lport->disc.disc_mutex);
2653 return next_time;
2654 }
2655
2656 /**
2657 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2658 * @fip: The FCoE controller that received the frame
2659 * @skb: The received FIP frame
2660 *
2661 * Returns non-zero if the frame is dropped.
2662 * Always consumes the frame.
2663 */
2664 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2665 {
2666 struct fip_header *fiph;
2667 enum fip_vn2vn_subcode sub;
2668 struct {
2669 struct fc_rport_priv rdata;
2670 struct fcoe_rport frport;
2671 } buf;
2672 int rc;
2673
2674 fiph = (struct fip_header *)skb->data;
2675 sub = fiph->fip_subcode;
2676
2677 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
2678 if (rc) {
2679 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2680 goto drop;
2681 }
2682
2683 mutex_lock(&fip->ctlr_mutex);
2684 switch (sub) {
2685 case FIP_SC_VN_PROBE_REQ:
2686 fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
2687 break;
2688 case FIP_SC_VN_PROBE_REP:
2689 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
2690 break;
2691 case FIP_SC_VN_CLAIM_NOTIFY:
2692 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
2693 break;
2694 case FIP_SC_VN_CLAIM_REP:
2695 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
2696 break;
2697 case FIP_SC_VN_BEACON:
2698 fcoe_ctlr_vn_beacon(fip, &buf.rdata);
2699 break;
2700 default:
2701 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2702 rc = -1;
2703 break;
2704 }
2705 mutex_unlock(&fip->ctlr_mutex);
2706 drop:
2707 kfree_skb(skb);
2708 return rc;
2709 }
2710
2711 /**
2712 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2713 * @lport: The local port
2714 * @fp: The received frame
2715 *
2716 * This should never be called since we don't see RSCNs or other
2717 * fabric-generated ELSes.
2718 */
2719 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2720 {
2721 struct fc_seq_els_data rjt_data;
2722
2723 rjt_data.reason = ELS_RJT_UNSUP;
2724 rjt_data.explan = ELS_EXPL_NONE;
2725 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2726 fc_frame_free(fp);
2727 }
2728
2729 /**
2730 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2731 * @fip: The FCoE controller
2732 *
2733 * This sets a flag indicating that remote ports should be created
2734 * and started for the peers we discover. We use the disc_callback
2735 * pointer as that flag. Peers already discovered are created here.
2736 *
2737 * The lport lock is held during this call. The callback must be done
2738 * later, without holding either the lport or discovery locks.
2739 * The fcoe_ctlr lock may also be held during this call.
2740 */
2741 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2742 enum fc_disc_event),
2743 struct fc_lport *lport)
2744 {
2745 struct fc_disc *disc = &lport->disc;
2746 struct fcoe_ctlr *fip = disc->priv;
2747
2748 mutex_lock(&disc->disc_mutex);
2749 disc->disc_callback = callback;
2750 disc->disc_id = (disc->disc_id + 2) | 1;
2751 disc->pending = 1;
2752 schedule_work(&fip->timer_work);
2753 mutex_unlock(&disc->disc_mutex);
2754 }
2755
2756 /**
2757 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2758 * @fip: The FCoE controller
2759 *
2760 * Starts the FLOGI and PLOGI login process to each discovered rport for which
2761 * we've received at least one beacon.
2762 * Performs the discovery complete callback.
2763 */
2764 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
2765 {
2766 struct fc_lport *lport = fip->lp;
2767 struct fc_disc *disc = &lport->disc;
2768 struct fc_rport_priv *rdata;
2769 struct fcoe_rport *frport;
2770 void (*callback)(struct fc_lport *, enum fc_disc_event);
2771
2772 mutex_lock(&disc->disc_mutex);
2773 callback = disc->pending ? disc->disc_callback : NULL;
2774 disc->pending = 0;
2775 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
2776 frport = fcoe_ctlr_rport(rdata);
2777 if (frport->time)
2778 lport->tt.rport_login(rdata);
2779 }
2780 mutex_unlock(&disc->disc_mutex);
2781 if (callback)
2782 callback(lport, DISC_EV_SUCCESS);
2783 }
2784
2785 /**
2786 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
2787 * @fip: The FCoE controller
2788 */
2789 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
2790 {
2791 unsigned long next_time;
2792 u8 mac[ETH_ALEN];
2793 u32 new_port_id = 0;
2794
2795 mutex_lock(&fip->ctlr_mutex);
2796 switch (fip->state) {
2797 case FIP_ST_VNMP_START:
2798 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
2799 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2800 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
2801 break;
2802 case FIP_ST_VNMP_PROBE1:
2803 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
2804 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2805 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2806 break;
2807 case FIP_ST_VNMP_PROBE2:
2808 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
2809 new_port_id = fip->port_id;
2810 hton24(mac, FIP_VN_FC_MAP);
2811 hton24(mac + 3, new_port_id);
2812 fcoe_ctlr_map_dest(fip);
2813 fip->update_mac(fip->lp, mac);
2814 fcoe_ctlr_vn_send_claim(fip);
2815 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2816 break;
2817 case FIP_ST_VNMP_CLAIM:
2818 /*
2819 * This may be invoked either by starting discovery so don't
2820 * go to the next state unless it's been long enough.
2821 */
2822 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2823 if (time_after_eq(jiffies, next_time)) {
2824 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
2825 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2826 fcoe_all_vn2vn, 0);
2827 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2828 fip->port_ka_time = next_time;
2829 }
2830 fcoe_ctlr_vn_disc(fip);
2831 break;
2832 case FIP_ST_VNMP_UP:
2833 next_time = fcoe_ctlr_vn_age(fip);
2834 if (time_after_eq(jiffies, fip->port_ka_time)) {
2835 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2836 fcoe_all_vn2vn, 0);
2837 fip->port_ka_time = jiffies +
2838 msecs_to_jiffies(FIP_VN_BEACON_INT +
2839 (prandom_u32() % FIP_VN_BEACON_FUZZ));
2840 }
2841 if (time_before(fip->port_ka_time, next_time))
2842 next_time = fip->port_ka_time;
2843 break;
2844 case FIP_ST_LINK_WAIT:
2845 goto unlock;
2846 default:
2847 WARN(1, "unexpected state %d\n", fip->state);
2848 goto unlock;
2849 }
2850 mod_timer(&fip->timer, next_time);
2851 unlock:
2852 mutex_unlock(&fip->ctlr_mutex);
2853
2854 /* If port ID is new, notify local port after dropping ctlr_mutex */
2855 if (new_port_id)
2856 fc_lport_set_local_id(fip->lp, new_port_id);
2857 }
2858
2859 /**
2860 * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode
2861 * @lport: The local port to be (re)configured
2862 * @fip: The FCoE controller whose mode is changing
2863 * @fip_mode: The new fip mode
2864 *
2865 * Note that the we shouldn't be changing the libfc discovery settings
2866 * (fc_disc_config) while an lport is going through the libfc state
2867 * machine. The mode can only be changed when a fcoe_ctlr device is
2868 * disabled, so that should ensure that this routine is only called
2869 * when nothing is happening.
2870 */
2871 static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
2872 enum fip_state fip_mode)
2873 {
2874 void *priv;
2875
2876 WARN_ON(lport->state != LPORT_ST_RESET &&
2877 lport->state != LPORT_ST_DISABLED);
2878
2879 if (fip_mode == FIP_MODE_VN2VN) {
2880 lport->rport_priv_size = sizeof(struct fcoe_rport);
2881 lport->point_to_multipoint = 1;
2882 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
2883 lport->tt.disc_start = fcoe_ctlr_disc_start;
2884 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
2885 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
2886 priv = fip;
2887 } else {
2888 lport->rport_priv_size = 0;
2889 lport->point_to_multipoint = 0;
2890 lport->tt.disc_recv_req = NULL;
2891 lport->tt.disc_start = NULL;
2892 lport->tt.disc_stop = NULL;
2893 lport->tt.disc_stop_final = NULL;
2894 priv = lport;
2895 }
2896
2897 fc_disc_config(lport, priv);
2898 }
2899
2900 /**
2901 * fcoe_libfc_config() - Sets up libfc related properties for local port
2902 * @lport: The local port to configure libfc for
2903 * @fip: The FCoE controller in use by the local port
2904 * @tt: The libfc function template
2905 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
2906 *
2907 * Returns : 0 for success
2908 */
2909 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
2910 const struct libfc_function_template *tt, int init_fcp)
2911 {
2912 /* Set the function pointers set by the LLDD */
2913 memcpy(&lport->tt, tt, sizeof(*tt));
2914 if (init_fcp && fc_fcp_init(lport))
2915 return -ENOMEM;
2916 fc_exch_init(lport);
2917 fc_elsct_init(lport);
2918 fc_lport_init(lport);
2919 fc_rport_init(lport);
2920 fc_disc_init(lport);
2921 fcoe_ctlr_mode_set(lport, fip, fip->mode);
2922 return 0;
2923 }
2924 EXPORT_SYMBOL_GPL(fcoe_libfc_config);
2925
2926 void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev)
2927 {
2928 struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
2929 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
2930 struct fcoe_fcf *fcf;
2931
2932 mutex_lock(&fip->ctlr_mutex);
2933 mutex_lock(&ctlr_dev->lock);
2934
2935 fcf = fcoe_fcf_device_priv(fcf_dev);
2936 if (fcf)
2937 fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0;
2938 else
2939 fcf_dev->selected = 0;
2940
2941 mutex_unlock(&ctlr_dev->lock);
2942 mutex_unlock(&fip->ctlr_mutex);
2943 }
2944 EXPORT_SYMBOL(fcoe_fcf_get_selected);
2945
2946 void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)
2947 {
2948 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
2949 struct fc_lport *lport = ctlr->lp;
2950
2951 mutex_lock(&ctlr->ctlr_mutex);
2952 switch (ctlr_dev->mode) {
2953 case FIP_CONN_TYPE_VN2VN:
2954 ctlr->mode = FIP_MODE_VN2VN;
2955 break;
2956 case FIP_CONN_TYPE_FABRIC:
2957 default:
2958 ctlr->mode = FIP_MODE_FABRIC;
2959 break;
2960 }
2961
2962 mutex_unlock(&ctlr->ctlr_mutex);
2963
2964 fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode);
2965 }
2966 EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);
Linux kernel - Deliverables
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