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[mirror_ubuntu-bionic-kernel.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 int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *, struct sk_buff *);
63
64 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
65 static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
66 static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
67 static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
68
69 static const char * const fcoe_ctlr_states[] = {
70 [FIP_ST_DISABLED] = "DISABLED",
71 [FIP_ST_LINK_WAIT] = "LINK_WAIT",
72 [FIP_ST_AUTO] = "AUTO",
73 [FIP_ST_NON_FIP] = "NON_FIP",
74 [FIP_ST_ENABLED] = "ENABLED",
75 [FIP_ST_VNMP_START] = "VNMP_START",
76 [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
77 [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
78 [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
79 [FIP_ST_VNMP_UP] = "VNMP_UP",
80 };
81
82 static const char *fcoe_ctlr_state(enum fip_state state)
83 {
84 const char *cp = "unknown";
85
86 if (state < ARRAY_SIZE(fcoe_ctlr_states))
87 cp = fcoe_ctlr_states[state];
88 if (!cp)
89 cp = "unknown";
90 return cp;
91 }
92
93 /**
94 * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
95 * @fip: The FCoE controller
96 * @state: The new state
97 */
98 static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
99 {
100 if (state == fip->state)
101 return;
102 if (fip->lp)
103 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
104 fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
105 fip->state = state;
106 }
107
108 /**
109 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
110 * @fcf: The FCF to check
111 *
112 * Return non-zero if FCF fcoe_size has been validated.
113 */
114 static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
115 {
116 return (fcf->flags & FIP_FL_SOL) != 0;
117 }
118
119 /**
120 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
121 * @fcf: The FCF to check
122 *
123 * Return non-zero if the FCF is usable.
124 */
125 static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
126 {
127 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
128
129 return (fcf->flags & flags) == flags;
130 }
131
132 /**
133 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
134 * @fip: The FCoE controller
135 */
136 static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
137 {
138 if (fip->mode == FIP_MODE_VN2VN)
139 hton24(fip->dest_addr, FIP_VN_FC_MAP);
140 else
141 hton24(fip->dest_addr, FIP_DEF_FC_MAP);
142 hton24(fip->dest_addr + 3, 0);
143 fip->map_dest = 1;
144 }
145
146 /**
147 * fcoe_ctlr_init() - Initialize the FCoE Controller instance
148 * @fip: The FCoE controller to initialize
149 */
150 void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
151 {
152 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
153 fip->mode = mode;
154 fip->fip_resp = false;
155 INIT_LIST_HEAD(&fip->fcfs);
156 mutex_init(&fip->ctlr_mutex);
157 spin_lock_init(&fip->ctlr_lock);
158 fip->flogi_oxid = FC_XID_UNKNOWN;
159 setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
160 INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
161 INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
162 skb_queue_head_init(&fip->fip_recv_list);
163 }
164 EXPORT_SYMBOL(fcoe_ctlr_init);
165
166 /**
167 * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
168 * @new: The newly discovered FCF
169 *
170 * Called with fip->ctlr_mutex held
171 */
172 static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new)
173 {
174 struct fcoe_ctlr *fip = new->fip;
175 struct fcoe_ctlr_device *ctlr_dev;
176 struct fcoe_fcf_device *temp, *fcf_dev;
177 int rc = -ENOMEM;
178
179 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
180 new->fabric_name, new->fcf_mac);
181
182 temp = kzalloc(sizeof(*temp), GFP_KERNEL);
183 if (!temp)
184 goto out;
185
186 temp->fabric_name = new->fabric_name;
187 temp->switch_name = new->switch_name;
188 temp->fc_map = new->fc_map;
189 temp->vfid = new->vfid;
190 memcpy(temp->mac, new->fcf_mac, ETH_ALEN);
191 temp->priority = new->pri;
192 temp->fka_period = new->fka_period;
193 temp->selected = 0; /* default to unselected */
194
195 /*
196 * If ctlr_dev doesn't exist then it means we're a libfcoe user
197 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device.
198 * fnic would be an example of a driver with this behavior. In this
199 * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we
200 * don't want to make sysfs changes.
201 */
202
203 ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
204 if (ctlr_dev) {
205 mutex_lock(&ctlr_dev->lock);
206 fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp);
207 if (unlikely(!fcf_dev)) {
208 rc = -ENOMEM;
209 mutex_unlock(&ctlr_dev->lock);
210 goto out;
211 }
212
213 /*
214 * The fcoe_sysfs layer can return a CONNECTED fcf that
215 * has a priv (fcf was never deleted) or a CONNECTED fcf
216 * that doesn't have a priv (fcf was deleted). However,
217 * libfcoe will always delete FCFs before trying to add
218 * them. This is ensured because both recv_adv and
219 * age_fcfs are protected by the the fcoe_ctlr's mutex.
220 * This means that we should never get a FCF with a
221 * non-NULL priv pointer.
222 */
223 BUG_ON(fcf_dev->priv);
224
225 fcf_dev->priv = new;
226 new->fcf_dev = fcf_dev;
227 mutex_unlock(&ctlr_dev->lock);
228 }
229
230 list_add(&new->list, &fip->fcfs);
231 fip->fcf_count++;
232 rc = 0;
233
234 out:
235 kfree(temp);
236 return rc;
237 }
238
239 /**
240 * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
241 * @new: The FCF to be removed
242 *
243 * Called with fip->ctlr_mutex held
244 */
245 static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
246 {
247 struct fcoe_ctlr *fip = new->fip;
248 struct fcoe_ctlr_device *cdev;
249 struct fcoe_fcf_device *fcf_dev;
250
251 list_del(&new->list);
252 fip->fcf_count--;
253
254 /*
255 * If ctlr_dev doesn't exist then it means we're a libfcoe user
256 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device
257 * or a fcoe_fcf_device.
258 *
259 * fnic would be an example of a driver with this behavior. In this
260 * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above),
261 * but we don't want to make sysfs changes.
262 */
263 cdev = fcoe_ctlr_to_ctlr_dev(fip);
264 if (cdev) {
265 mutex_lock(&cdev->lock);
266 fcf_dev = fcoe_fcf_to_fcf_dev(new);
267 WARN_ON(!fcf_dev);
268 new->fcf_dev = NULL;
269 fcoe_fcf_device_delete(fcf_dev);
270 kfree(new);
271 mutex_unlock(&cdev->lock);
272 }
273 }
274
275 /**
276 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
277 * @fip: The FCoE controller whose FCFs are to be reset
278 *
279 * Called with &fcoe_ctlr lock held.
280 */
281 static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
282 {
283 struct fcoe_fcf *fcf;
284 struct fcoe_fcf *next;
285
286 fip->sel_fcf = NULL;
287 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
288 fcoe_sysfs_fcf_del(fcf);
289 }
290 WARN_ON(fip->fcf_count);
291
292 fip->sel_time = 0;
293 }
294
295 /**
296 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
297 * @fip: The FCoE controller to tear down
298 *
299 * This is called by FCoE drivers before freeing the &fcoe_ctlr.
300 *
301 * The receive handler will have been deleted before this to guarantee
302 * that no more recv_work will be scheduled.
303 *
304 * The timer routine will simply return once we set FIP_ST_DISABLED.
305 * This guarantees that no further timeouts or work will be scheduled.
306 */
307 void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
308 {
309 cancel_work_sync(&fip->recv_work);
310 skb_queue_purge(&fip->fip_recv_list);
311
312 mutex_lock(&fip->ctlr_mutex);
313 fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
314 fcoe_ctlr_reset_fcfs(fip);
315 mutex_unlock(&fip->ctlr_mutex);
316 del_timer_sync(&fip->timer);
317 cancel_work_sync(&fip->timer_work);
318 }
319 EXPORT_SYMBOL(fcoe_ctlr_destroy);
320
321 /**
322 * fcoe_ctlr_announce() - announce new FCF selection
323 * @fip: The FCoE controller
324 *
325 * Also sets the destination MAC for FCoE and control packets
326 *
327 * Called with neither ctlr_mutex nor ctlr_lock held.
328 */
329 static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
330 {
331 struct fcoe_fcf *sel;
332 struct fcoe_fcf *fcf;
333
334 mutex_lock(&fip->ctlr_mutex);
335 spin_lock_bh(&fip->ctlr_lock);
336
337 kfree_skb(fip->flogi_req);
338 fip->flogi_req = NULL;
339 list_for_each_entry(fcf, &fip->fcfs, list)
340 fcf->flogi_sent = 0;
341
342 spin_unlock_bh(&fip->ctlr_lock);
343 sel = fip->sel_fcf;
344
345 if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr))
346 goto unlock;
347 if (!is_zero_ether_addr(fip->dest_addr)) {
348 printk(KERN_NOTICE "libfcoe: host%d: "
349 "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
350 fip->lp->host->host_no, fip->dest_addr);
351 memset(fip->dest_addr, 0, ETH_ALEN);
352 }
353 if (sel) {
354 printk(KERN_INFO "libfcoe: host%d: FIP selected "
355 "Fibre-Channel Forwarder MAC %pM\n",
356 fip->lp->host->host_no, sel->fcf_mac);
357 memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN);
358 fip->map_dest = 0;
359 }
360 unlock:
361 mutex_unlock(&fip->ctlr_mutex);
362 }
363
364 /**
365 * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
366 * @fip: The FCoE controller to get the maximum FCoE size from
367 *
368 * Returns the maximum packet size including the FCoE header and trailer,
369 * but not including any Ethernet or VLAN headers.
370 */
371 static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
372 {
373 /*
374 * Determine the max FCoE frame size allowed, including
375 * FCoE header and trailer.
376 * Note: lp->mfs is currently the payload size, not the frame size.
377 */
378 return fip->lp->mfs + sizeof(struct fc_frame_header) +
379 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
380 }
381
382 /**
383 * fcoe_ctlr_solicit() - Send a FIP solicitation
384 * @fip: The FCoE controller to send the solicitation on
385 * @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
386 */
387 static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
388 {
389 struct sk_buff *skb;
390 struct fip_sol {
391 struct ethhdr eth;
392 struct fip_header fip;
393 struct {
394 struct fip_mac_desc mac;
395 struct fip_wwn_desc wwnn;
396 struct fip_size_desc size;
397 } __packed desc;
398 } __packed * sol;
399 u32 fcoe_size;
400
401 skb = dev_alloc_skb(sizeof(*sol));
402 if (!skb)
403 return;
404
405 sol = (struct fip_sol *)skb->data;
406
407 memset(sol, 0, sizeof(*sol));
408 memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
409 memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
410 sol->eth.h_proto = htons(ETH_P_FIP);
411
412 sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
413 sol->fip.fip_op = htons(FIP_OP_DISC);
414 sol->fip.fip_subcode = FIP_SC_SOL;
415 sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
416 sol->fip.fip_flags = htons(FIP_FL_FPMA);
417 if (fip->spma)
418 sol->fip.fip_flags |= htons(FIP_FL_SPMA);
419
420 sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
421 sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
422 memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
423
424 sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
425 sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
426 put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
427
428 fcoe_size = fcoe_ctlr_fcoe_size(fip);
429 sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
430 sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
431 sol->desc.size.fd_size = htons(fcoe_size);
432
433 skb_put(skb, sizeof(*sol));
434 skb->protocol = htons(ETH_P_FIP);
435 skb->priority = fip->priority;
436 skb_reset_mac_header(skb);
437 skb_reset_network_header(skb);
438 fip->send(fip, skb);
439
440 if (!fcf)
441 fip->sol_time = jiffies;
442 }
443
444 /**
445 * fcoe_ctlr_link_up() - Start FCoE controller
446 * @fip: The FCoE controller to start
447 *
448 * Called from the LLD when the network link is ready.
449 */
450 void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
451 {
452 mutex_lock(&fip->ctlr_mutex);
453 if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
454 mutex_unlock(&fip->ctlr_mutex);
455 fc_linkup(fip->lp);
456 } else if (fip->state == FIP_ST_LINK_WAIT) {
457 fcoe_ctlr_set_state(fip, fip->mode);
458 switch (fip->mode) {
459 default:
460 LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
461 /* fall-through */
462 case FIP_MODE_AUTO:
463 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
464 /* fall-through */
465 case FIP_MODE_FABRIC:
466 case FIP_MODE_NON_FIP:
467 mutex_unlock(&fip->ctlr_mutex);
468 fc_linkup(fip->lp);
469 fcoe_ctlr_solicit(fip, NULL);
470 break;
471 case FIP_MODE_VN2VN:
472 fcoe_ctlr_vn_start(fip);
473 mutex_unlock(&fip->ctlr_mutex);
474 fc_linkup(fip->lp);
475 break;
476 }
477 } else
478 mutex_unlock(&fip->ctlr_mutex);
479 }
480 EXPORT_SYMBOL(fcoe_ctlr_link_up);
481
482 /**
483 * fcoe_ctlr_reset() - Reset a FCoE controller
484 * @fip: The FCoE controller to reset
485 */
486 static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
487 {
488 fcoe_ctlr_reset_fcfs(fip);
489 del_timer(&fip->timer);
490 fip->ctlr_ka_time = 0;
491 fip->port_ka_time = 0;
492 fip->sol_time = 0;
493 fip->flogi_oxid = FC_XID_UNKNOWN;
494 fcoe_ctlr_map_dest(fip);
495 }
496
497 /**
498 * fcoe_ctlr_link_down() - Stop a FCoE controller
499 * @fip: The FCoE controller to be stopped
500 *
501 * Returns non-zero if the link was up and now isn't.
502 *
503 * Called from the LLD when the network link is not ready.
504 * There may be multiple calls while the link is down.
505 */
506 int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
507 {
508 int link_dropped;
509
510 LIBFCOE_FIP_DBG(fip, "link down.\n");
511 mutex_lock(&fip->ctlr_mutex);
512 fcoe_ctlr_reset(fip);
513 link_dropped = fip->state != FIP_ST_LINK_WAIT;
514 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
515 mutex_unlock(&fip->ctlr_mutex);
516
517 if (link_dropped)
518 fc_linkdown(fip->lp);
519 return link_dropped;
520 }
521 EXPORT_SYMBOL(fcoe_ctlr_link_down);
522
523 /**
524 * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
525 * @fip: The FCoE controller to send the FKA on
526 * @lport: libfc fc_lport to send from
527 * @ports: 0 for controller keep-alive, 1 for port keep-alive
528 * @sa: The source MAC address
529 *
530 * A controller keep-alive is sent every fka_period (typically 8 seconds).
531 * The source MAC is the native MAC address.
532 *
533 * A port keep-alive is sent every 90 seconds while logged in.
534 * The source MAC is the assigned mapped source address.
535 * The destination is the FCF's F-port.
536 */
537 static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
538 struct fc_lport *lport,
539 int ports, u8 *sa)
540 {
541 struct sk_buff *skb;
542 struct fip_kal {
543 struct ethhdr eth;
544 struct fip_header fip;
545 struct fip_mac_desc mac;
546 } __packed * kal;
547 struct fip_vn_desc *vn;
548 u32 len;
549 struct fc_lport *lp;
550 struct fcoe_fcf *fcf;
551
552 fcf = fip->sel_fcf;
553 lp = fip->lp;
554 if (!fcf || (ports && !lp->port_id))
555 return;
556
557 len = sizeof(*kal) + ports * sizeof(*vn);
558 skb = dev_alloc_skb(len);
559 if (!skb)
560 return;
561
562 kal = (struct fip_kal *)skb->data;
563 memset(kal, 0, len);
564 memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
565 memcpy(kal->eth.h_source, sa, ETH_ALEN);
566 kal->eth.h_proto = htons(ETH_P_FIP);
567
568 kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
569 kal->fip.fip_op = htons(FIP_OP_CTRL);
570 kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
571 kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
572 ports * sizeof(*vn)) / FIP_BPW);
573 kal->fip.fip_flags = htons(FIP_FL_FPMA);
574 if (fip->spma)
575 kal->fip.fip_flags |= htons(FIP_FL_SPMA);
576
577 kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
578 kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
579 memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
580 if (ports) {
581 vn = (struct fip_vn_desc *)(kal + 1);
582 vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
583 vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
584 memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
585 hton24(vn->fd_fc_id, lport->port_id);
586 put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
587 }
588 skb_put(skb, len);
589 skb->protocol = htons(ETH_P_FIP);
590 skb->priority = fip->priority;
591 skb_reset_mac_header(skb);
592 skb_reset_network_header(skb);
593 fip->send(fip, skb);
594 }
595
596 /**
597 * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
598 * @fip: The FCoE controller for the ELS frame
599 * @dtype: The FIP descriptor type for the frame
600 * @skb: The FCoE ELS frame including FC header but no FCoE headers
601 * @d_id: The destination port ID.
602 *
603 * Returns non-zero error code on failure.
604 *
605 * The caller must check that the length is a multiple of 4.
606 *
607 * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
608 * Headroom includes the FIP encapsulation description, FIP header, and
609 * Ethernet header. The tailroom is for the FIP MAC descriptor.
610 */
611 static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
612 u8 dtype, struct sk_buff *skb, u32 d_id)
613 {
614 struct fip_encaps_head {
615 struct ethhdr eth;
616 struct fip_header fip;
617 struct fip_encaps encaps;
618 } __packed * cap;
619 struct fc_frame_header *fh;
620 struct fip_mac_desc *mac;
621 struct fcoe_fcf *fcf;
622 size_t dlen;
623 u16 fip_flags;
624 u8 op;
625
626 fh = (struct fc_frame_header *)skb->data;
627 op = *(u8 *)(fh + 1);
628 dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
629 cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
630 memset(cap, 0, sizeof(*cap));
631
632 if (lport->point_to_multipoint) {
633 if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest))
634 return -ENODEV;
635 fip_flags = 0;
636 } else {
637 fcf = fip->sel_fcf;
638 if (!fcf)
639 return -ENODEV;
640 fip_flags = fcf->flags;
641 fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA :
642 FIP_FL_FPMA;
643 if (!fip_flags)
644 return -ENODEV;
645 memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
646 }
647 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
648 cap->eth.h_proto = htons(ETH_P_FIP);
649
650 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
651 cap->fip.fip_op = htons(FIP_OP_LS);
652 if (op == ELS_LS_ACC || op == ELS_LS_RJT)
653 cap->fip.fip_subcode = FIP_SC_REP;
654 else
655 cap->fip.fip_subcode = FIP_SC_REQ;
656 cap->fip.fip_flags = htons(fip_flags);
657
658 cap->encaps.fd_desc.fip_dtype = dtype;
659 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
660
661 if (op != ELS_LS_RJT) {
662 dlen += sizeof(*mac);
663 mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
664 memset(mac, 0, sizeof(*mac));
665 mac->fd_desc.fip_dtype = FIP_DT_MAC;
666 mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
667 if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
668 memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
669 } else if (fip->mode == FIP_MODE_VN2VN) {
670 hton24(mac->fd_mac, FIP_VN_FC_MAP);
671 hton24(mac->fd_mac + 3, fip->port_id);
672 } else if (fip_flags & FIP_FL_SPMA) {
673 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
674 memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
675 } else {
676 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
677 /* FPMA only FLOGI. Must leave the MAC desc zeroed. */
678 }
679 }
680 cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
681
682 skb->protocol = htons(ETH_P_FIP);
683 skb->priority = fip->priority;
684 skb_reset_mac_header(skb);
685 skb_reset_network_header(skb);
686 return 0;
687 }
688
689 /**
690 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
691 * @fip: FCoE controller.
692 * @lport: libfc fc_lport to send from
693 * @skb: FCoE ELS frame including FC header but no FCoE headers.
694 *
695 * Returns a non-zero error code if the frame should not be sent.
696 * Returns zero if the caller should send the frame with FCoE encapsulation.
697 *
698 * The caller must check that the length is a multiple of 4.
699 * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
700 * The the skb must also be an fc_frame.
701 *
702 * This is called from the lower-level driver with spinlocks held,
703 * so we must not take a mutex here.
704 */
705 int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
706 struct sk_buff *skb)
707 {
708 struct fc_frame *fp;
709 struct fc_frame_header *fh;
710 u16 old_xid;
711 u8 op;
712 u8 mac[ETH_ALEN];
713
714 fp = container_of(skb, struct fc_frame, skb);
715 fh = (struct fc_frame_header *)skb->data;
716 op = *(u8 *)(fh + 1);
717
718 if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) {
719 old_xid = fip->flogi_oxid;
720 fip->flogi_oxid = ntohs(fh->fh_ox_id);
721 if (fip->state == FIP_ST_AUTO) {
722 if (old_xid == FC_XID_UNKNOWN)
723 fip->flogi_count = 0;
724 fip->flogi_count++;
725 if (fip->flogi_count < 3)
726 goto drop;
727 fcoe_ctlr_map_dest(fip);
728 return 0;
729 }
730 if (fip->state == FIP_ST_NON_FIP)
731 fcoe_ctlr_map_dest(fip);
732 }
733
734 if (fip->state == FIP_ST_NON_FIP)
735 return 0;
736 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
737 goto drop;
738 switch (op) {
739 case ELS_FLOGI:
740 op = FIP_DT_FLOGI;
741 if (fip->mode == FIP_MODE_VN2VN)
742 break;
743 spin_lock_bh(&fip->ctlr_lock);
744 kfree_skb(fip->flogi_req);
745 fip->flogi_req = skb;
746 fip->flogi_req_send = 1;
747 spin_unlock_bh(&fip->ctlr_lock);
748 schedule_work(&fip->timer_work);
749 return -EINPROGRESS;
750 case ELS_FDISC:
751 if (ntoh24(fh->fh_s_id))
752 return 0;
753 op = FIP_DT_FDISC;
754 break;
755 case ELS_LOGO:
756 if (fip->mode == FIP_MODE_VN2VN) {
757 if (fip->state != FIP_ST_VNMP_UP)
758 return -EINVAL;
759 if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI)
760 return -EINVAL;
761 } else {
762 if (fip->state != FIP_ST_ENABLED)
763 return 0;
764 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
765 return 0;
766 }
767 op = FIP_DT_LOGO;
768 break;
769 case ELS_LS_ACC:
770 /*
771 * If non-FIP, we may have gotten an SID by accepting an FLOGI
772 * from a point-to-point connection. Switch to using
773 * the source mac based on the SID. The destination
774 * MAC in this case would have been set by receiving the
775 * FLOGI.
776 */
777 if (fip->state == FIP_ST_NON_FIP) {
778 if (fip->flogi_oxid == FC_XID_UNKNOWN)
779 return 0;
780 fip->flogi_oxid = FC_XID_UNKNOWN;
781 fc_fcoe_set_mac(mac, fh->fh_d_id);
782 fip->update_mac(lport, mac);
783 }
784 /* fall through */
785 case ELS_LS_RJT:
786 op = fr_encaps(fp);
787 if (op)
788 break;
789 return 0;
790 default:
791 if (fip->state != FIP_ST_ENABLED &&
792 fip->state != FIP_ST_VNMP_UP)
793 goto drop;
794 return 0;
795 }
796 LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n",
797 op, ntoh24(fh->fh_d_id));
798 if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id)))
799 goto drop;
800 fip->send(fip, skb);
801 return -EINPROGRESS;
802 drop:
803 kfree_skb(skb);
804 return -EINVAL;
805 }
806 EXPORT_SYMBOL(fcoe_ctlr_els_send);
807
808 /**
809 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
810 * @fip: The FCoE controller to free FCFs on
811 *
812 * Called with lock held and preemption disabled.
813 *
814 * An FCF is considered old if we have missed two advertisements.
815 * That is, there have been no valid advertisement from it for 2.5
816 * times its keep-alive period.
817 *
818 * In addition, determine the time when an FCF selection can occur.
819 *
820 * Also, increment the MissDiscAdvCount when no advertisement is received
821 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
822 *
823 * Returns the time in jiffies for the next call.
824 */
825 static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
826 {
827 struct fcoe_fcf *fcf;
828 struct fcoe_fcf *next;
829 unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
830 unsigned long deadline;
831 unsigned long sel_time = 0;
832 struct list_head del_list;
833 struct fc_stats *stats;
834
835 INIT_LIST_HEAD(&del_list);
836
837 stats = per_cpu_ptr(fip->lp->stats, get_cpu());
838
839 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
840 deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
841 if (fip->sel_fcf == fcf) {
842 if (time_after(jiffies, deadline)) {
843 stats->MissDiscAdvCount++;
844 printk(KERN_INFO "libfcoe: host%d: "
845 "Missing Discovery Advertisement "
846 "for fab %16.16llx count %lld\n",
847 fip->lp->host->host_no, fcf->fabric_name,
848 stats->MissDiscAdvCount);
849 } else if (time_after(next_timer, deadline))
850 next_timer = deadline;
851 }
852
853 deadline += fcf->fka_period;
854 if (time_after_eq(jiffies, deadline)) {
855 if (fip->sel_fcf == fcf)
856 fip->sel_fcf = NULL;
857 /*
858 * Move to delete list so we can call
859 * fcoe_sysfs_fcf_del (which can sleep)
860 * after the put_cpu().
861 */
862 list_del(&fcf->list);
863 list_add(&fcf->list, &del_list);
864 stats->VLinkFailureCount++;
865 } else {
866 if (time_after(next_timer, deadline))
867 next_timer = deadline;
868 if (fcoe_ctlr_mtu_valid(fcf) &&
869 (!sel_time || time_before(sel_time, fcf->time)))
870 sel_time = fcf->time;
871 }
872 }
873 put_cpu();
874
875 list_for_each_entry_safe(fcf, next, &del_list, list) {
876 /* Removes fcf from current list */
877 fcoe_sysfs_fcf_del(fcf);
878 }
879
880 if (sel_time && !fip->sel_fcf && !fip->sel_time) {
881 sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
882 fip->sel_time = sel_time;
883 }
884
885 return next_timer;
886 }
887
888 /**
889 * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
890 * @fip: The FCoE controller receiving the advertisement
891 * @skb: The received FIP advertisement frame
892 * @fcf: The resulting FCF entry
893 *
894 * Returns zero on a valid parsed advertisement,
895 * otherwise returns non zero value.
896 */
897 static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
898 struct sk_buff *skb, struct fcoe_fcf *fcf)
899 {
900 struct fip_header *fiph;
901 struct fip_desc *desc = NULL;
902 struct fip_wwn_desc *wwn;
903 struct fip_fab_desc *fab;
904 struct fip_fka_desc *fka;
905 unsigned long t;
906 size_t rlen;
907 size_t dlen;
908 u32 desc_mask;
909
910 memset(fcf, 0, sizeof(*fcf));
911 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
912
913 fiph = (struct fip_header *)skb->data;
914 fcf->flags = ntohs(fiph->fip_flags);
915
916 /*
917 * mask of required descriptors. validating each one clears its bit.
918 */
919 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
920 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
921
922 rlen = ntohs(fiph->fip_dl_len) * 4;
923 if (rlen + sizeof(*fiph) > skb->len)
924 return -EINVAL;
925
926 desc = (struct fip_desc *)(fiph + 1);
927 while (rlen > 0) {
928 dlen = desc->fip_dlen * FIP_BPW;
929 if (dlen < sizeof(*desc) || dlen > rlen)
930 return -EINVAL;
931 /* Drop Adv if there are duplicate critical descriptors */
932 if ((desc->fip_dtype < 32) &&
933 !(desc_mask & 1U << desc->fip_dtype)) {
934 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
935 "Descriptors in FIP adv\n");
936 return -EINVAL;
937 }
938 switch (desc->fip_dtype) {
939 case FIP_DT_PRI:
940 if (dlen != sizeof(struct fip_pri_desc))
941 goto len_err;
942 fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
943 desc_mask &= ~BIT(FIP_DT_PRI);
944 break;
945 case FIP_DT_MAC:
946 if (dlen != sizeof(struct fip_mac_desc))
947 goto len_err;
948 memcpy(fcf->fcf_mac,
949 ((struct fip_mac_desc *)desc)->fd_mac,
950 ETH_ALEN);
951 memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN);
952 if (!is_valid_ether_addr(fcf->fcf_mac)) {
953 LIBFCOE_FIP_DBG(fip,
954 "Invalid MAC addr %pM in FIP adv\n",
955 fcf->fcf_mac);
956 return -EINVAL;
957 }
958 desc_mask &= ~BIT(FIP_DT_MAC);
959 break;
960 case FIP_DT_NAME:
961 if (dlen != sizeof(struct fip_wwn_desc))
962 goto len_err;
963 wwn = (struct fip_wwn_desc *)desc;
964 fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
965 desc_mask &= ~BIT(FIP_DT_NAME);
966 break;
967 case FIP_DT_FAB:
968 if (dlen != sizeof(struct fip_fab_desc))
969 goto len_err;
970 fab = (struct fip_fab_desc *)desc;
971 fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
972 fcf->vfid = ntohs(fab->fd_vfid);
973 fcf->fc_map = ntoh24(fab->fd_map);
974 desc_mask &= ~BIT(FIP_DT_FAB);
975 break;
976 case FIP_DT_FKA:
977 if (dlen != sizeof(struct fip_fka_desc))
978 goto len_err;
979 fka = (struct fip_fka_desc *)desc;
980 if (fka->fd_flags & FIP_FKA_ADV_D)
981 fcf->fd_flags = 1;
982 t = ntohl(fka->fd_fka_period);
983 if (t >= FCOE_CTLR_MIN_FKA)
984 fcf->fka_period = msecs_to_jiffies(t);
985 desc_mask &= ~BIT(FIP_DT_FKA);
986 break;
987 case FIP_DT_MAP_OUI:
988 case FIP_DT_FCOE_SIZE:
989 case FIP_DT_FLOGI:
990 case FIP_DT_FDISC:
991 case FIP_DT_LOGO:
992 case FIP_DT_ELP:
993 default:
994 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
995 "in FIP adv\n", desc->fip_dtype);
996 /* standard says ignore unknown descriptors >= 128 */
997 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
998 return -EINVAL;
999 break;
1000 }
1001 desc = (struct fip_desc *)((char *)desc + dlen);
1002 rlen -= dlen;
1003 }
1004 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
1005 return -EINVAL;
1006 if (!fcf->switch_name)
1007 return -EINVAL;
1008 if (desc_mask) {
1009 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
1010 desc_mask);
1011 return -EINVAL;
1012 }
1013 return 0;
1014
1015 len_err:
1016 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1017 desc->fip_dtype, dlen);
1018 return -EINVAL;
1019 }
1020
1021 /**
1022 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
1023 * @fip: The FCoE controller receiving the advertisement
1024 * @skb: The received FIP packet
1025 */
1026 static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1027 {
1028 struct fcoe_fcf *fcf;
1029 struct fcoe_fcf new;
1030 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
1031 int first = 0;
1032 int mtu_valid;
1033 int found = 0;
1034 int rc = 0;
1035
1036 if (fcoe_ctlr_parse_adv(fip, skb, &new))
1037 return;
1038
1039 mutex_lock(&fip->ctlr_mutex);
1040 first = list_empty(&fip->fcfs);
1041 list_for_each_entry(fcf, &fip->fcfs, list) {
1042 if (fcf->switch_name == new.switch_name &&
1043 fcf->fabric_name == new.fabric_name &&
1044 fcf->fc_map == new.fc_map &&
1045 ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) {
1046 found = 1;
1047 break;
1048 }
1049 }
1050 if (!found) {
1051 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
1052 goto out;
1053
1054 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
1055 if (!fcf)
1056 goto out;
1057
1058 memcpy(fcf, &new, sizeof(new));
1059 fcf->fip = fip;
1060 rc = fcoe_sysfs_fcf_add(fcf);
1061 if (rc) {
1062 printk(KERN_ERR "Failed to allocate sysfs instance "
1063 "for FCF, fab %16.16llx mac %pM\n",
1064 new.fabric_name, new.fcf_mac);
1065 kfree(fcf);
1066 goto out;
1067 }
1068 } else {
1069 /*
1070 * Update the FCF's keep-alive descriptor flags.
1071 * Other flag changes from new advertisements are
1072 * ignored after a solicited advertisement is
1073 * received and the FCF is selectable (usable).
1074 */
1075 fcf->fd_flags = new.fd_flags;
1076 if (!fcoe_ctlr_fcf_usable(fcf))
1077 fcf->flags = new.flags;
1078
1079 if (fcf == fip->sel_fcf && !fcf->fd_flags) {
1080 fip->ctlr_ka_time -= fcf->fka_period;
1081 fip->ctlr_ka_time += new.fka_period;
1082 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1083 mod_timer(&fip->timer, fip->ctlr_ka_time);
1084 }
1085 fcf->fka_period = new.fka_period;
1086 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
1087 }
1088
1089 mtu_valid = fcoe_ctlr_mtu_valid(fcf);
1090 fcf->time = jiffies;
1091 if (!found)
1092 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
1093 fcf->fabric_name, fcf->fcf_mac);
1094
1095 /*
1096 * If this advertisement is not solicited and our max receive size
1097 * hasn't been verified, send a solicited advertisement.
1098 */
1099 if (!mtu_valid)
1100 fcoe_ctlr_solicit(fip, fcf);
1101
1102 /*
1103 * If its been a while since we did a solicit, and this is
1104 * the first advertisement we've received, do a multicast
1105 * solicitation to gather as many advertisements as we can
1106 * before selection occurs.
1107 */
1108 if (first && time_after(jiffies, fip->sol_time + sol_tov))
1109 fcoe_ctlr_solicit(fip, NULL);
1110
1111 /*
1112 * Put this FCF at the head of the list for priority among equals.
1113 * This helps in the case of an NPV switch which insists we use
1114 * the FCF that answers multicast solicitations, not the others that
1115 * are sending periodic multicast advertisements.
1116 */
1117 if (mtu_valid)
1118 list_move(&fcf->list, &fip->fcfs);
1119
1120 /*
1121 * If this is the first validated FCF, note the time and
1122 * set a timer to trigger selection.
1123 */
1124 if (mtu_valid && !fip->sel_fcf && !fip->sel_time &&
1125 fcoe_ctlr_fcf_usable(fcf)) {
1126 fip->sel_time = jiffies +
1127 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
1128 if (!timer_pending(&fip->timer) ||
1129 time_before(fip->sel_time, fip->timer.expires))
1130 mod_timer(&fip->timer, fip->sel_time);
1131 }
1132
1133 out:
1134 mutex_unlock(&fip->ctlr_mutex);
1135 }
1136
1137 /**
1138 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
1139 * @fip: The FCoE controller which received the packet
1140 * @skb: The received FIP packet
1141 */
1142 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1143 {
1144 struct fc_lport *lport = fip->lp;
1145 struct fip_header *fiph;
1146 struct fc_frame *fp = (struct fc_frame *)skb;
1147 struct fc_frame_header *fh = NULL;
1148 struct fip_desc *desc;
1149 struct fip_encaps *els;
1150 struct fcoe_fcf *sel;
1151 struct fc_stats *stats;
1152 enum fip_desc_type els_dtype = 0;
1153 u8 els_op;
1154 u8 sub;
1155 u8 granted_mac[ETH_ALEN] = { 0 };
1156 size_t els_len = 0;
1157 size_t rlen;
1158 size_t dlen;
1159 u32 desc_mask = 0;
1160 u32 desc_cnt = 0;
1161
1162 fiph = (struct fip_header *)skb->data;
1163 sub = fiph->fip_subcode;
1164 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1165 goto drop;
1166
1167 rlen = ntohs(fiph->fip_dl_len) * 4;
1168 if (rlen + sizeof(*fiph) > skb->len)
1169 goto drop;
1170
1171 desc = (struct fip_desc *)(fiph + 1);
1172 while (rlen > 0) {
1173 desc_cnt++;
1174 dlen = desc->fip_dlen * FIP_BPW;
1175 if (dlen < sizeof(*desc) || dlen > rlen)
1176 goto drop;
1177 /* Drop ELS if there are duplicate critical descriptors */
1178 if (desc->fip_dtype < 32) {
1179 if ((desc->fip_dtype != FIP_DT_MAC) &&
1180 (desc_mask & 1U << desc->fip_dtype)) {
1181 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1182 "Descriptors in FIP ELS\n");
1183 goto drop;
1184 }
1185 desc_mask |= (1 << desc->fip_dtype);
1186 }
1187 switch (desc->fip_dtype) {
1188 case FIP_DT_MAC:
1189 sel = fip->sel_fcf;
1190 if (desc_cnt == 1) {
1191 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1192 "received out of order\n");
1193 goto drop;
1194 }
1195 /*
1196 * Some switch implementations send two MAC descriptors,
1197 * with first MAC(granted_mac) being the FPMA, and the
1198 * second one(fcoe_mac) is used as destination address
1199 * for sending/receiving FCoE packets. FIP traffic is
1200 * sent using fip_mac. For regular switches, both
1201 * fip_mac and fcoe_mac would be the same.
1202 */
1203 if (desc_cnt == 2)
1204 memcpy(granted_mac,
1205 ((struct fip_mac_desc *)desc)->fd_mac,
1206 ETH_ALEN);
1207
1208 if (dlen != sizeof(struct fip_mac_desc))
1209 goto len_err;
1210
1211 if ((desc_cnt == 3) && (sel))
1212 memcpy(sel->fcoe_mac,
1213 ((struct fip_mac_desc *)desc)->fd_mac,
1214 ETH_ALEN);
1215 break;
1216 case FIP_DT_FLOGI:
1217 case FIP_DT_FDISC:
1218 case FIP_DT_LOGO:
1219 case FIP_DT_ELP:
1220 if (desc_cnt != 1) {
1221 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1222 "received out of order\n");
1223 goto drop;
1224 }
1225 if (fh)
1226 goto drop;
1227 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1228 goto len_err;
1229 els_len = dlen - sizeof(*els);
1230 els = (struct fip_encaps *)desc;
1231 fh = (struct fc_frame_header *)(els + 1);
1232 els_dtype = desc->fip_dtype;
1233 break;
1234 default:
1235 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1236 "in FIP adv\n", desc->fip_dtype);
1237 /* standard says ignore unknown descriptors >= 128 */
1238 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
1239 goto drop;
1240 if (desc_cnt <= 2) {
1241 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1242 "received out of order\n");
1243 goto drop;
1244 }
1245 break;
1246 }
1247 desc = (struct fip_desc *)((char *)desc + dlen);
1248 rlen -= dlen;
1249 }
1250
1251 if (!fh)
1252 goto drop;
1253 els_op = *(u8 *)(fh + 1);
1254
1255 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
1256 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
1257 if (els_op == ELS_LS_ACC) {
1258 if (!is_valid_ether_addr(granted_mac)) {
1259 LIBFCOE_FIP_DBG(fip,
1260 "Invalid MAC address %pM in FIP ELS\n",
1261 granted_mac);
1262 goto drop;
1263 }
1264 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1265
1266 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1267 fip->flogi_oxid = FC_XID_UNKNOWN;
1268 if (els_dtype == FIP_DT_FLOGI)
1269 fcoe_ctlr_announce(fip);
1270 }
1271 } else if (els_dtype == FIP_DT_FLOGI &&
1272 !fcoe_ctlr_flogi_retry(fip))
1273 goto drop; /* retrying FLOGI so drop reject */
1274 }
1275
1276 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
1277 (!(1U << FIP_DT_MAC & desc_mask)))) {
1278 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
1279 "in FIP ELS\n");
1280 goto drop;
1281 }
1282
1283 /*
1284 * Convert skb into an fc_frame containing only the ELS.
1285 */
1286 skb_pull(skb, (u8 *)fh - skb->data);
1287 skb_trim(skb, els_len);
1288 fp = (struct fc_frame *)skb;
1289 fc_frame_init(fp);
1290 fr_sof(fp) = FC_SOF_I3;
1291 fr_eof(fp) = FC_EOF_T;
1292 fr_dev(fp) = lport;
1293 fr_encaps(fp) = els_dtype;
1294
1295 stats = per_cpu_ptr(lport->stats, get_cpu());
1296 stats->RxFrames++;
1297 stats->RxWords += skb->len / FIP_BPW;
1298 put_cpu();
1299
1300 fc_exch_recv(lport, fp);
1301 return;
1302
1303 len_err:
1304 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1305 desc->fip_dtype, dlen);
1306 drop:
1307 kfree_skb(skb);
1308 }
1309
1310 /**
1311 * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
1312 * @fip: The FCoE controller that received the frame
1313 * @fh: The received FIP header
1314 *
1315 * There may be multiple VN_Port descriptors.
1316 * The overall length has already been checked.
1317 */
1318 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1319 struct fip_header *fh)
1320 {
1321 struct fip_desc *desc;
1322 struct fip_mac_desc *mp;
1323 struct fip_wwn_desc *wp;
1324 struct fip_vn_desc *vp;
1325 size_t rlen;
1326 size_t dlen;
1327 struct fcoe_fcf *fcf = fip->sel_fcf;
1328 struct fc_lport *lport = fip->lp;
1329 struct fc_lport *vn_port = NULL;
1330 u32 desc_mask;
1331 int num_vlink_desc;
1332 int reset_phys_port = 0;
1333 struct fip_vn_desc **vlink_desc_arr = NULL;
1334
1335 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1336
1337 if (!fcf || !lport->port_id) {
1338 /*
1339 * We are yet to select best FCF, but we got CVL in the
1340 * meantime. reset the ctlr and let it rediscover the FCF
1341 */
1342 mutex_lock(&fip->ctlr_mutex);
1343 fcoe_ctlr_reset(fip);
1344 mutex_unlock(&fip->ctlr_mutex);
1345 return;
1346 }
1347
1348 /*
1349 * mask of required descriptors. Validating each one clears its bit.
1350 */
1351 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
1352
1353 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1354 desc = (struct fip_desc *)(fh + 1);
1355
1356 /*
1357 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
1358 * before determining max Vx_Port descriptor but a buggy FCF could have
1359 * omited either or both MAC Address and Name Identifier descriptors
1360 */
1361 num_vlink_desc = rlen / sizeof(*vp);
1362 if (num_vlink_desc)
1363 vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc,
1364 GFP_ATOMIC);
1365 if (!vlink_desc_arr)
1366 return;
1367 num_vlink_desc = 0;
1368
1369 while (rlen >= sizeof(*desc)) {
1370 dlen = desc->fip_dlen * FIP_BPW;
1371 if (dlen > rlen)
1372 goto err;
1373 /* Drop CVL if there are duplicate critical descriptors */
1374 if ((desc->fip_dtype < 32) &&
1375 (desc->fip_dtype != FIP_DT_VN_ID) &&
1376 !(desc_mask & 1U << desc->fip_dtype)) {
1377 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1378 "Descriptors in FIP CVL\n");
1379 goto err;
1380 }
1381 switch (desc->fip_dtype) {
1382 case FIP_DT_MAC:
1383 mp = (struct fip_mac_desc *)desc;
1384 if (dlen < sizeof(*mp))
1385 goto err;
1386 if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
1387 goto err;
1388 desc_mask &= ~BIT(FIP_DT_MAC);
1389 break;
1390 case FIP_DT_NAME:
1391 wp = (struct fip_wwn_desc *)desc;
1392 if (dlen < sizeof(*wp))
1393 goto err;
1394 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1395 goto err;
1396 desc_mask &= ~BIT(FIP_DT_NAME);
1397 break;
1398 case FIP_DT_VN_ID:
1399 vp = (struct fip_vn_desc *)desc;
1400 if (dlen < sizeof(*vp))
1401 goto err;
1402 vlink_desc_arr[num_vlink_desc++] = vp;
1403 vn_port = fc_vport_id_lookup(lport,
1404 ntoh24(vp->fd_fc_id));
1405 if (vn_port && (vn_port == lport)) {
1406 mutex_lock(&fip->ctlr_mutex);
1407 per_cpu_ptr(lport->stats,
1408 get_cpu())->VLinkFailureCount++;
1409 put_cpu();
1410 fcoe_ctlr_reset(fip);
1411 mutex_unlock(&fip->ctlr_mutex);
1412 }
1413 break;
1414 default:
1415 /* standard says ignore unknown descriptors >= 128 */
1416 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
1417 goto err;
1418 break;
1419 }
1420 desc = (struct fip_desc *)((char *)desc + dlen);
1421 rlen -= dlen;
1422 }
1423
1424 /*
1425 * reset only if all required descriptors were present and valid.
1426 */
1427 if (desc_mask)
1428 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1429 desc_mask);
1430 else if (!num_vlink_desc) {
1431 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
1432 /*
1433 * No Vx_Port description. Clear all NPIV ports,
1434 * followed by physical port
1435 */
1436 mutex_lock(&fip->ctlr_mutex);
1437 per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++;
1438 put_cpu();
1439 fcoe_ctlr_reset(fip);
1440 mutex_unlock(&fip->ctlr_mutex);
1441
1442 mutex_lock(&lport->lp_mutex);
1443 list_for_each_entry(vn_port, &lport->vports, list)
1444 fc_lport_reset(vn_port);
1445 mutex_unlock(&lport->lp_mutex);
1446
1447 fc_lport_reset(fip->lp);
1448 fcoe_ctlr_solicit(fip, NULL);
1449 } else {
1450 int i;
1451
1452 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1453 for (i = 0; i < num_vlink_desc; i++) {
1454 vp = vlink_desc_arr[i];
1455 vn_port = fc_vport_id_lookup(lport,
1456 ntoh24(vp->fd_fc_id));
1457 if (!vn_port)
1458 continue;
1459
1460 /*
1461 * 'port_id' is already validated, check MAC address and
1462 * wwpn
1463 */
1464 if (!ether_addr_equal(fip->get_src_addr(vn_port),
1465 vp->fd_mac) ||
1466 get_unaligned_be64(&vp->fd_wwpn) !=
1467 vn_port->wwpn)
1468 continue;
1469
1470 if (vn_port == lport)
1471 /*
1472 * Physical port, defer processing till all
1473 * listed NPIV ports are cleared
1474 */
1475 reset_phys_port = 1;
1476 else /* NPIV port */
1477 fc_lport_reset(vn_port);
1478 }
1479
1480 if (reset_phys_port) {
1481 fc_lport_reset(fip->lp);
1482 fcoe_ctlr_solicit(fip, NULL);
1483 }
1484 }
1485
1486 err:
1487 kfree(vlink_desc_arr);
1488 }
1489
1490 /**
1491 * fcoe_ctlr_recv() - Receive a FIP packet
1492 * @fip: The FCoE controller that received the packet
1493 * @skb: The received FIP packet
1494 *
1495 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1496 */
1497 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1498 {
1499 skb = skb_share_check(skb, GFP_ATOMIC);
1500 if (!skb)
1501 return;
1502 skb_queue_tail(&fip->fip_recv_list, skb);
1503 schedule_work(&fip->recv_work);
1504 }
1505 EXPORT_SYMBOL(fcoe_ctlr_recv);
1506
1507 /**
1508 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1509 * @fip: The FCoE controller that received the frame
1510 * @skb: The received FIP frame
1511 *
1512 * Returns non-zero if the frame is dropped.
1513 */
1514 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1515 {
1516 struct fip_header *fiph;
1517 struct ethhdr *eh;
1518 enum fip_state state;
1519 bool fip_vlan_resp = false;
1520 u16 op;
1521 u8 sub;
1522
1523 if (skb_linearize(skb))
1524 goto drop;
1525 if (skb->len < sizeof(*fiph))
1526 goto drop;
1527 eh = eth_hdr(skb);
1528 if (fip->mode == FIP_MODE_VN2VN) {
1529 if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1530 !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
1531 !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
1532 goto drop;
1533 } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1534 !ether_addr_equal(eh->h_dest, fcoe_all_enode))
1535 goto drop;
1536 fiph = (struct fip_header *)skb->data;
1537 op = ntohs(fiph->fip_op);
1538 sub = fiph->fip_subcode;
1539
1540 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1541 goto drop;
1542 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1543 goto drop;
1544
1545 mutex_lock(&fip->ctlr_mutex);
1546 state = fip->state;
1547 if (state == FIP_ST_AUTO) {
1548 fip->map_dest = 0;
1549 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1550 state = FIP_ST_ENABLED;
1551 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1552 }
1553 fip_vlan_resp = fip->fip_resp;
1554 mutex_unlock(&fip->ctlr_mutex);
1555
1556 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1557 return fcoe_ctlr_vn_recv(fip, skb);
1558
1559 if (fip_vlan_resp && op == FIP_OP_VLAN) {
1560 LIBFCOE_FIP_DBG(fip, "fip vlan discovery\n");
1561 return fcoe_ctlr_vlan_recv(fip, skb);
1562 }
1563
1564 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1565 state != FIP_ST_VNMP_CLAIM)
1566 goto drop;
1567
1568 if (op == FIP_OP_LS) {
1569 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1570 return 0;
1571 }
1572
1573 if (state != FIP_ST_ENABLED)
1574 goto drop;
1575
1576 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1577 fcoe_ctlr_recv_adv(fip, skb);
1578 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1579 fcoe_ctlr_recv_clr_vlink(fip, fiph);
1580 kfree_skb(skb);
1581 return 0;
1582 drop:
1583 kfree_skb(skb);
1584 return -1;
1585 }
1586
1587 /**
1588 * fcoe_ctlr_select() - Select the best FCF (if possible)
1589 * @fip: The FCoE controller
1590 *
1591 * Returns the selected FCF, or NULL if none are usable.
1592 *
1593 * If there are conflicting advertisements, no FCF can be chosen.
1594 *
1595 * If there is already a selected FCF, this will choose a better one or
1596 * an equivalent one that hasn't already been sent a FLOGI.
1597 *
1598 * Called with lock held.
1599 */
1600 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1601 {
1602 struct fcoe_fcf *fcf;
1603 struct fcoe_fcf *best = fip->sel_fcf;
1604
1605 list_for_each_entry(fcf, &fip->fcfs, list) {
1606 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1607 "VFID %d mac %pM map %x val %d "
1608 "sent %u pri %u\n",
1609 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1610 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1611 fcf->flogi_sent, fcf->pri);
1612 if (!fcoe_ctlr_fcf_usable(fcf)) {
1613 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1614 "map %x %svalid %savailable\n",
1615 fcf->fabric_name, fcf->fc_map,
1616 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1617 (fcf->flags & FIP_FL_AVAIL) ?
1618 "" : "un");
1619 continue;
1620 }
1621 if (!best || fcf->pri < best->pri || best->flogi_sent)
1622 best = fcf;
1623 if (fcf->fabric_name != best->fabric_name ||
1624 fcf->vfid != best->vfid ||
1625 fcf->fc_map != best->fc_map) {
1626 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1627 "or FC-MAP\n");
1628 return NULL;
1629 }
1630 }
1631 fip->sel_fcf = best;
1632 if (best) {
1633 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1634 fip->port_ka_time = jiffies +
1635 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1636 fip->ctlr_ka_time = jiffies + best->fka_period;
1637 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1638 mod_timer(&fip->timer, fip->ctlr_ka_time);
1639 }
1640 return best;
1641 }
1642
1643 /**
1644 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1645 * @fip: The FCoE controller
1646 *
1647 * Returns non-zero error if it could not be sent.
1648 *
1649 * Called with ctlr_mutex and ctlr_lock held.
1650 * Caller must verify that fip->sel_fcf is not NULL.
1651 */
1652 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1653 {
1654 struct sk_buff *skb;
1655 struct sk_buff *skb_orig;
1656 struct fc_frame_header *fh;
1657 int error;
1658
1659 skb_orig = fip->flogi_req;
1660 if (!skb_orig)
1661 return -EINVAL;
1662
1663 /*
1664 * Clone and send the FLOGI request. If clone fails, use original.
1665 */
1666 skb = skb_clone(skb_orig, GFP_ATOMIC);
1667 if (!skb) {
1668 skb = skb_orig;
1669 fip->flogi_req = NULL;
1670 }
1671 fh = (struct fc_frame_header *)skb->data;
1672 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1673 ntoh24(fh->fh_d_id));
1674 if (error) {
1675 kfree_skb(skb);
1676 return error;
1677 }
1678 fip->send(fip, skb);
1679 fip->sel_fcf->flogi_sent = 1;
1680 return 0;
1681 }
1682
1683 /**
1684 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1685 * @fip: The FCoE controller
1686 *
1687 * Returns non-zero error code if there's no FLOGI request to retry or
1688 * no alternate FCF available.
1689 */
1690 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1691 {
1692 struct fcoe_fcf *fcf;
1693 int error;
1694
1695 mutex_lock(&fip->ctlr_mutex);
1696 spin_lock_bh(&fip->ctlr_lock);
1697 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1698 fcf = fcoe_ctlr_select(fip);
1699 if (!fcf || fcf->flogi_sent) {
1700 kfree_skb(fip->flogi_req);
1701 fip->flogi_req = NULL;
1702 error = -ENOENT;
1703 } else {
1704 fcoe_ctlr_solicit(fip, NULL);
1705 error = fcoe_ctlr_flogi_send_locked(fip);
1706 }
1707 spin_unlock_bh(&fip->ctlr_lock);
1708 mutex_unlock(&fip->ctlr_mutex);
1709 return error;
1710 }
1711
1712
1713 /**
1714 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1715 * @fip: The FCoE controller that timed out
1716 *
1717 * Done here because fcoe_ctlr_els_send() can't get mutex.
1718 *
1719 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1720 */
1721 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1722 {
1723 struct fcoe_fcf *fcf;
1724
1725 spin_lock_bh(&fip->ctlr_lock);
1726 fcf = fip->sel_fcf;
1727 if (!fcf || !fip->flogi_req_send)
1728 goto unlock;
1729
1730 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1731
1732 /*
1733 * If this FLOGI is being sent due to a timeout retry
1734 * to the same FCF as before, select a different FCF if possible.
1735 */
1736 if (fcf->flogi_sent) {
1737 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1738 fcf = fcoe_ctlr_select(fip);
1739 if (!fcf || fcf->flogi_sent) {
1740 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1741 list_for_each_entry(fcf, &fip->fcfs, list)
1742 fcf->flogi_sent = 0;
1743 fcf = fcoe_ctlr_select(fip);
1744 }
1745 }
1746 if (fcf) {
1747 fcoe_ctlr_flogi_send_locked(fip);
1748 fip->flogi_req_send = 0;
1749 } else /* XXX */
1750 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1751 unlock:
1752 spin_unlock_bh(&fip->ctlr_lock);
1753 }
1754
1755 /**
1756 * fcoe_ctlr_timeout() - FIP timeout handler
1757 * @arg: The FCoE controller that timed out
1758 */
1759 static void fcoe_ctlr_timeout(unsigned long arg)
1760 {
1761 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1762
1763 schedule_work(&fip->timer_work);
1764 }
1765
1766 /**
1767 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1768 * @work: Handle to a FCoE controller
1769 *
1770 * Ages FCFs. Triggers FCF selection if possible.
1771 * Sends keep-alives and resets.
1772 */
1773 static void fcoe_ctlr_timer_work(struct work_struct *work)
1774 {
1775 struct fcoe_ctlr *fip;
1776 struct fc_lport *vport;
1777 u8 *mac;
1778 u8 reset = 0;
1779 u8 send_ctlr_ka = 0;
1780 u8 send_port_ka = 0;
1781 struct fcoe_fcf *sel;
1782 struct fcoe_fcf *fcf;
1783 unsigned long next_timer;
1784
1785 fip = container_of(work, struct fcoe_ctlr, timer_work);
1786 if (fip->mode == FIP_MODE_VN2VN)
1787 return fcoe_ctlr_vn_timeout(fip);
1788 mutex_lock(&fip->ctlr_mutex);
1789 if (fip->state == FIP_ST_DISABLED) {
1790 mutex_unlock(&fip->ctlr_mutex);
1791 return;
1792 }
1793
1794 fcf = fip->sel_fcf;
1795 next_timer = fcoe_ctlr_age_fcfs(fip);
1796
1797 sel = fip->sel_fcf;
1798 if (!sel && fip->sel_time) {
1799 if (time_after_eq(jiffies, fip->sel_time)) {
1800 sel = fcoe_ctlr_select(fip);
1801 fip->sel_time = 0;
1802 } else if (time_after(next_timer, fip->sel_time))
1803 next_timer = fip->sel_time;
1804 }
1805
1806 if (sel && fip->flogi_req_send)
1807 fcoe_ctlr_flogi_send(fip);
1808 else if (!sel && fcf)
1809 reset = 1;
1810
1811 if (sel && !sel->fd_flags) {
1812 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1813 fip->ctlr_ka_time = jiffies + sel->fka_period;
1814 send_ctlr_ka = 1;
1815 }
1816 if (time_after(next_timer, fip->ctlr_ka_time))
1817 next_timer = fip->ctlr_ka_time;
1818
1819 if (time_after_eq(jiffies, fip->port_ka_time)) {
1820 fip->port_ka_time = jiffies +
1821 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1822 send_port_ka = 1;
1823 }
1824 if (time_after(next_timer, fip->port_ka_time))
1825 next_timer = fip->port_ka_time;
1826 }
1827 if (!list_empty(&fip->fcfs))
1828 mod_timer(&fip->timer, next_timer);
1829 mutex_unlock(&fip->ctlr_mutex);
1830
1831 if (reset) {
1832 fc_lport_reset(fip->lp);
1833 /* restart things with a solicitation */
1834 fcoe_ctlr_solicit(fip, NULL);
1835 }
1836
1837 if (send_ctlr_ka)
1838 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1839
1840 if (send_port_ka) {
1841 mutex_lock(&fip->lp->lp_mutex);
1842 mac = fip->get_src_addr(fip->lp);
1843 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1844 list_for_each_entry(vport, &fip->lp->vports, list) {
1845 mac = fip->get_src_addr(vport);
1846 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1847 }
1848 mutex_unlock(&fip->lp->lp_mutex);
1849 }
1850 }
1851
1852 /**
1853 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1854 * @recv_work: Handle to a FCoE controller
1855 */
1856 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1857 {
1858 struct fcoe_ctlr *fip;
1859 struct sk_buff *skb;
1860
1861 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1862 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1863 fcoe_ctlr_recv_handler(fip, skb);
1864 }
1865
1866 /**
1867 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1868 * @fip: The FCoE controller
1869 * @fp: The FC frame to snoop
1870 *
1871 * Snoop potential response to FLOGI or even incoming FLOGI.
1872 *
1873 * The caller has checked that we are waiting for login as indicated
1874 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1875 *
1876 * The caller is responsible for freeing the frame.
1877 * Fill in the granted_mac address.
1878 *
1879 * Return non-zero if the frame should not be delivered to libfc.
1880 */
1881 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1882 struct fc_frame *fp)
1883 {
1884 struct fc_frame_header *fh;
1885 u8 op;
1886 u8 *sa;
1887
1888 sa = eth_hdr(&fp->skb)->h_source;
1889 fh = fc_frame_header_get(fp);
1890 if (fh->fh_type != FC_TYPE_ELS)
1891 return 0;
1892
1893 op = fc_frame_payload_op(fp);
1894 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1895 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1896
1897 mutex_lock(&fip->ctlr_mutex);
1898 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1899 mutex_unlock(&fip->ctlr_mutex);
1900 return -EINVAL;
1901 }
1902 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1903 LIBFCOE_FIP_DBG(fip,
1904 "received FLOGI LS_ACC using non-FIP mode\n");
1905
1906 /*
1907 * FLOGI accepted.
1908 * If the src mac addr is FC_OUI-based, then we mark the
1909 * address_mode flag to use FC_OUI-based Ethernet DA.
1910 * Otherwise we use the FCoE gateway addr
1911 */
1912 if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1913 fcoe_ctlr_map_dest(fip);
1914 } else {
1915 memcpy(fip->dest_addr, sa, ETH_ALEN);
1916 fip->map_dest = 0;
1917 }
1918 fip->flogi_oxid = FC_XID_UNKNOWN;
1919 mutex_unlock(&fip->ctlr_mutex);
1920 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1921 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1922 /*
1923 * Save source MAC for point-to-point responses.
1924 */
1925 mutex_lock(&fip->ctlr_mutex);
1926 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1927 memcpy(fip->dest_addr, sa, ETH_ALEN);
1928 fip->map_dest = 0;
1929 if (fip->state == FIP_ST_AUTO)
1930 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1931 "Setting non-FIP mode\n");
1932 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1933 }
1934 mutex_unlock(&fip->ctlr_mutex);
1935 }
1936 return 0;
1937 }
1938 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1939
1940 /**
1941 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1942 * @mac: The MAC address to convert
1943 * @scheme: The scheme to use when converting
1944 * @port: The port indicator for converting
1945 *
1946 * Returns: u64 fc world wide name
1947 */
1948 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1949 unsigned int scheme, unsigned int port)
1950 {
1951 u64 wwn;
1952 u64 host_mac;
1953
1954 /* The MAC is in NO, so flip only the low 48 bits */
1955 host_mac = ((u64) mac[0] << 40) |
1956 ((u64) mac[1] << 32) |
1957 ((u64) mac[2] << 24) |
1958 ((u64) mac[3] << 16) |
1959 ((u64) mac[4] << 8) |
1960 (u64) mac[5];
1961
1962 WARN_ON(host_mac >= (1ULL << 48));
1963 wwn = host_mac | ((u64) scheme << 60);
1964 switch (scheme) {
1965 case 1:
1966 WARN_ON(port != 0);
1967 break;
1968 case 2:
1969 WARN_ON(port >= 0xfff);
1970 wwn |= (u64) port << 48;
1971 break;
1972 default:
1973 WARN_ON(1);
1974 break;
1975 }
1976
1977 return wwn;
1978 }
1979 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1980
1981 /**
1982 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1983 * @rdata: libfc remote port
1984 */
1985 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1986 {
1987 return (struct fcoe_rport *)(rdata + 1);
1988 }
1989
1990 /**
1991 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
1992 * @fip: The FCoE controller
1993 * @sub: sub-opcode for probe request, reply, or advertisement.
1994 * @dest: The destination Ethernet MAC address
1995 * @min_len: minimum size of the Ethernet payload to be sent
1996 */
1997 static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
1998 enum fip_vn2vn_subcode sub,
1999 const u8 *dest, size_t min_len)
2000 {
2001 struct sk_buff *skb;
2002 struct fip_vn2vn_probe_frame {
2003 struct ethhdr eth;
2004 struct fip_header fip;
2005 struct fip_mac_desc mac;
2006 struct fip_wwn_desc wwnn;
2007 struct fip_vn_desc vn;
2008 } __packed * frame;
2009 struct fip_fc4_feat *ff;
2010 struct fip_size_desc *size;
2011 u32 fcp_feat;
2012 size_t len;
2013 size_t dlen;
2014
2015 len = sizeof(*frame);
2016 dlen = 0;
2017 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2018 dlen = sizeof(struct fip_fc4_feat) +
2019 sizeof(struct fip_size_desc);
2020 len += dlen;
2021 }
2022 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
2023 len = max(len, min_len + sizeof(struct ethhdr));
2024
2025 skb = dev_alloc_skb(len);
2026 if (!skb)
2027 return;
2028
2029 frame = (struct fip_vn2vn_probe_frame *)skb->data;
2030 memset(frame, 0, len);
2031 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2032
2033 if (sub == FIP_SC_VN_BEACON) {
2034 hton24(frame->eth.h_source, FIP_VN_FC_MAP);
2035 hton24(frame->eth.h_source + 3, fip->port_id);
2036 } else {
2037 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2038 }
2039 frame->eth.h_proto = htons(ETH_P_FIP);
2040
2041 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2042 frame->fip.fip_op = htons(FIP_OP_VN2VN);
2043 frame->fip.fip_subcode = sub;
2044 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2045
2046 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2047 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2048 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2049
2050 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
2051 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
2052 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
2053
2054 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
2055 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
2056 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
2057 hton24(frame->vn.fd_mac + 3, fip->port_id);
2058 hton24(frame->vn.fd_fc_id, fip->port_id);
2059 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
2060
2061 /*
2062 * For claims, add FC-4 features.
2063 * TBD: Add interface to get fc-4 types and features from libfc.
2064 */
2065 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2066 ff = (struct fip_fc4_feat *)(frame + 1);
2067 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
2068 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
2069 ff->fd_fts = fip->lp->fcts;
2070
2071 fcp_feat = 0;
2072 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
2073 fcp_feat |= FCP_FEAT_INIT;
2074 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
2075 fcp_feat |= FCP_FEAT_TARG;
2076 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
2077 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
2078
2079 size = (struct fip_size_desc *)(ff + 1);
2080 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
2081 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
2082 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
2083 }
2084
2085 skb_put(skb, len);
2086 skb->protocol = htons(ETH_P_FIP);
2087 skb->priority = fip->priority;
2088 skb_reset_mac_header(skb);
2089 skb_reset_network_header(skb);
2090
2091 fip->send(fip, skb);
2092 }
2093
2094 /**
2095 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
2096 * @lport: The lport which is receiving the event
2097 * @rdata: remote port private data
2098 * @event: The event that occurred
2099 *
2100 * Locking Note: The rport lock must not be held when calling this function.
2101 */
2102 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
2103 struct fc_rport_priv *rdata,
2104 enum fc_rport_event event)
2105 {
2106 struct fcoe_ctlr *fip = lport->disc.priv;
2107 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2108
2109 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
2110 rdata->ids.port_id, event);
2111
2112 mutex_lock(&fip->ctlr_mutex);
2113 switch (event) {
2114 case RPORT_EV_READY:
2115 frport->login_count = 0;
2116 break;
2117 case RPORT_EV_LOGO:
2118 case RPORT_EV_FAILED:
2119 case RPORT_EV_STOP:
2120 frport->login_count++;
2121 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
2122 LIBFCOE_FIP_DBG(fip,
2123 "rport FLOGI limited port_id %6.6x\n",
2124 rdata->ids.port_id);
2125 lport->tt.rport_logoff(rdata);
2126 }
2127 break;
2128 default:
2129 break;
2130 }
2131 mutex_unlock(&fip->ctlr_mutex);
2132 }
2133
2134 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
2135 .event_callback = fcoe_ctlr_vn_rport_callback,
2136 };
2137
2138 /**
2139 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
2140 * @fip: The FCoE controller
2141 *
2142 * Called with ctlr_mutex held.
2143 */
2144 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
2145 {
2146 struct fc_rport_priv *rdata;
2147
2148 mutex_lock(&lport->disc.disc_mutex);
2149 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers)
2150 lport->tt.rport_logoff(rdata);
2151 lport->disc.disc_callback = NULL;
2152 mutex_unlock(&lport->disc.disc_mutex);
2153 }
2154
2155 /**
2156 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
2157 * @fip: The FCoE controller
2158 *
2159 * Called through the local port template for discovery.
2160 * Called without the ctlr_mutex held.
2161 */
2162 static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
2163 {
2164 struct fcoe_ctlr *fip = lport->disc.priv;
2165
2166 mutex_lock(&fip->ctlr_mutex);
2167 fcoe_ctlr_disc_stop_locked(lport);
2168 mutex_unlock(&fip->ctlr_mutex);
2169 }
2170
2171 /**
2172 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
2173 * @fip: The FCoE controller
2174 *
2175 * Called through the local port template for discovery.
2176 * Called without the ctlr_mutex held.
2177 */
2178 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
2179 {
2180 fcoe_ctlr_disc_stop(lport);
2181 lport->tt.rport_flush_queue();
2182 synchronize_rcu();
2183 }
2184
2185 /**
2186 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
2187 * @fip: The FCoE controller
2188 *
2189 * Called with fcoe_ctlr lock held.
2190 */
2191 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
2192 {
2193 unsigned long wait;
2194 u32 port_id;
2195
2196 fcoe_ctlr_disc_stop_locked(fip->lp);
2197
2198 /*
2199 * Get proposed port ID.
2200 * If this is the first try after link up, use any previous port_id.
2201 * If there was none, use the low bits of the port_name.
2202 * On subsequent tries, get the next random one.
2203 * Don't use reserved IDs, use another non-zero value, just as random.
2204 */
2205 port_id = fip->port_id;
2206 if (fip->probe_tries)
2207 port_id = prandom_u32_state(&fip->rnd_state) & 0xffff;
2208 else if (!port_id)
2209 port_id = fip->lp->wwpn & 0xffff;
2210 if (!port_id || port_id == 0xffff)
2211 port_id = 1;
2212 fip->port_id = port_id;
2213
2214 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
2215 fip->probe_tries++;
2216 wait = prandom_u32() % FIP_VN_PROBE_WAIT;
2217 } else
2218 wait = FIP_VN_RLIM_INT;
2219 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
2220 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
2221 }
2222
2223 /**
2224 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2225 * @fip: The FCoE controller
2226 *
2227 * Called with fcoe_ctlr lock held.
2228 */
2229 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2230 {
2231 fip->probe_tries = 0;
2232 prandom_seed_state(&fip->rnd_state, fip->lp->wwpn);
2233 fcoe_ctlr_vn_restart(fip);
2234 }
2235
2236 /**
2237 * fcoe_ctlr_vn_parse - parse probe request or response
2238 * @fip: The FCoE controller
2239 * @skb: incoming packet
2240 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
2241 *
2242 * Returns non-zero error number on error.
2243 * Does not consume the packet.
2244 */
2245 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2246 struct sk_buff *skb,
2247 struct fc_rport_priv *rdata)
2248 {
2249 struct fip_header *fiph;
2250 struct fip_desc *desc = NULL;
2251 struct fip_mac_desc *macd = NULL;
2252 struct fip_wwn_desc *wwn = NULL;
2253 struct fip_vn_desc *vn = NULL;
2254 struct fip_size_desc *size = NULL;
2255 struct fcoe_rport *frport;
2256 size_t rlen;
2257 size_t dlen;
2258 u32 desc_mask = 0;
2259 u32 dtype;
2260 u8 sub;
2261
2262 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2263 frport = fcoe_ctlr_rport(rdata);
2264
2265 fiph = (struct fip_header *)skb->data;
2266 frport->flags = ntohs(fiph->fip_flags);
2267
2268 sub = fiph->fip_subcode;
2269 switch (sub) {
2270 case FIP_SC_VN_PROBE_REQ:
2271 case FIP_SC_VN_PROBE_REP:
2272 case FIP_SC_VN_BEACON:
2273 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2274 BIT(FIP_DT_VN_ID);
2275 break;
2276 case FIP_SC_VN_CLAIM_NOTIFY:
2277 case FIP_SC_VN_CLAIM_REP:
2278 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2279 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2280 BIT(FIP_DT_FCOE_SIZE);
2281 break;
2282 default:
2283 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2284 return -EINVAL;
2285 }
2286
2287 rlen = ntohs(fiph->fip_dl_len) * 4;
2288 if (rlen + sizeof(*fiph) > skb->len)
2289 return -EINVAL;
2290
2291 desc = (struct fip_desc *)(fiph + 1);
2292 while (rlen > 0) {
2293 dlen = desc->fip_dlen * FIP_BPW;
2294 if (dlen < sizeof(*desc) || dlen > rlen)
2295 return -EINVAL;
2296
2297 dtype = desc->fip_dtype;
2298 if (dtype < 32) {
2299 if (!(desc_mask & BIT(dtype))) {
2300 LIBFCOE_FIP_DBG(fip,
2301 "unexpected or duplicated desc "
2302 "desc type %u in "
2303 "FIP VN2VN subtype %u\n",
2304 dtype, sub);
2305 return -EINVAL;
2306 }
2307 desc_mask &= ~BIT(dtype);
2308 }
2309
2310 switch (dtype) {
2311 case FIP_DT_MAC:
2312 if (dlen != sizeof(struct fip_mac_desc))
2313 goto len_err;
2314 macd = (struct fip_mac_desc *)desc;
2315 if (!is_valid_ether_addr(macd->fd_mac)) {
2316 LIBFCOE_FIP_DBG(fip,
2317 "Invalid MAC addr %pM in FIP VN2VN\n",
2318 macd->fd_mac);
2319 return -EINVAL;
2320 }
2321 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2322 break;
2323 case FIP_DT_NAME:
2324 if (dlen != sizeof(struct fip_wwn_desc))
2325 goto len_err;
2326 wwn = (struct fip_wwn_desc *)desc;
2327 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2328 break;
2329 case FIP_DT_VN_ID:
2330 if (dlen != sizeof(struct fip_vn_desc))
2331 goto len_err;
2332 vn = (struct fip_vn_desc *)desc;
2333 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2334 rdata->ids.port_id = ntoh24(vn->fd_fc_id);
2335 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
2336 break;
2337 case FIP_DT_FC4F:
2338 if (dlen != sizeof(struct fip_fc4_feat))
2339 goto len_err;
2340 break;
2341 case FIP_DT_FCOE_SIZE:
2342 if (dlen != sizeof(struct fip_size_desc))
2343 goto len_err;
2344 size = (struct fip_size_desc *)desc;
2345 frport->fcoe_len = ntohs(size->fd_size);
2346 break;
2347 default:
2348 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2349 "in FIP probe\n", dtype);
2350 /* standard says ignore unknown descriptors >= 128 */
2351 if (dtype < FIP_DT_NON_CRITICAL)
2352 return -EINVAL;
2353 break;
2354 }
2355 desc = (struct fip_desc *)((char *)desc + dlen);
2356 rlen -= dlen;
2357 }
2358 return 0;
2359
2360 len_err:
2361 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2362 dtype, dlen);
2363 return -EINVAL;
2364 }
2365
2366 /**
2367 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2368 * @fip: The FCoE controller
2369 *
2370 * Called with ctlr_mutex held.
2371 */
2372 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2373 {
2374 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2375 fip->sol_time = jiffies;
2376 }
2377
2378 /**
2379 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2380 * @fip: The FCoE controller
2381 * @rdata: parsed remote port with frport from the probe request
2382 *
2383 * Called with ctlr_mutex held.
2384 */
2385 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2386 struct fc_rport_priv *rdata)
2387 {
2388 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2389
2390 if (rdata->ids.port_id != fip->port_id)
2391 return;
2392
2393 switch (fip->state) {
2394 case FIP_ST_VNMP_CLAIM:
2395 case FIP_ST_VNMP_UP:
2396 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2397 frport->enode_mac, 0);
2398 break;
2399 case FIP_ST_VNMP_PROBE1:
2400 case FIP_ST_VNMP_PROBE2:
2401 /*
2402 * Decide whether to reply to the Probe.
2403 * Our selected address is never a "recorded" one, so
2404 * only reply if our WWPN is greater and the
2405 * Probe's REC bit is not set.
2406 * If we don't reply, we will change our address.
2407 */
2408 if (fip->lp->wwpn > rdata->ids.port_name &&
2409 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2410 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2411 frport->enode_mac, 0);
2412 break;
2413 }
2414 /* fall through */
2415 case FIP_ST_VNMP_START:
2416 fcoe_ctlr_vn_restart(fip);
2417 break;
2418 default:
2419 break;
2420 }
2421 }
2422
2423 /**
2424 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2425 * @fip: The FCoE controller
2426 * @rdata: parsed remote port with frport from the probe request
2427 *
2428 * Called with ctlr_mutex held.
2429 */
2430 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2431 struct fc_rport_priv *rdata)
2432 {
2433 if (rdata->ids.port_id != fip->port_id)
2434 return;
2435 switch (fip->state) {
2436 case FIP_ST_VNMP_START:
2437 case FIP_ST_VNMP_PROBE1:
2438 case FIP_ST_VNMP_PROBE2:
2439 case FIP_ST_VNMP_CLAIM:
2440 fcoe_ctlr_vn_restart(fip);
2441 break;
2442 case FIP_ST_VNMP_UP:
2443 fcoe_ctlr_vn_send_claim(fip);
2444 break;
2445 default:
2446 break;
2447 }
2448 }
2449
2450 /**
2451 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2452 * @fip: The FCoE controller
2453 * @new: newly-parsed remote port with frport as a template for new rdata
2454 *
2455 * Called with ctlr_mutex held.
2456 */
2457 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
2458 {
2459 struct fc_lport *lport = fip->lp;
2460 struct fc_rport_priv *rdata;
2461 struct fc_rport_identifiers *ids;
2462 struct fcoe_rport *frport;
2463 u32 port_id;
2464
2465 port_id = new->ids.port_id;
2466 if (port_id == fip->port_id)
2467 return;
2468
2469 mutex_lock(&lport->disc.disc_mutex);
2470 rdata = lport->tt.rport_create(lport, port_id);
2471 if (!rdata) {
2472 mutex_unlock(&lport->disc.disc_mutex);
2473 return;
2474 }
2475
2476 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2477 rdata->disc_id = lport->disc.disc_id;
2478
2479 ids = &rdata->ids;
2480 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
2481 (ids->node_name != -1 && ids->node_name != new->ids.node_name))
2482 lport->tt.rport_logoff(rdata);
2483 ids->port_name = new->ids.port_name;
2484 ids->node_name = new->ids.node_name;
2485 mutex_unlock(&lport->disc.disc_mutex);
2486
2487 frport = fcoe_ctlr_rport(rdata);
2488 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
2489 port_id, frport->fcoe_len ? "old" : "new");
2490 *frport = *fcoe_ctlr_rport(new);
2491 frport->time = 0;
2492 }
2493
2494 /**
2495 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2496 * @fip: The FCoE controller
2497 * @port_id: The port_id of the remote VN_node
2498 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2499 *
2500 * Returns non-zero error if no remote port found.
2501 */
2502 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2503 {
2504 struct fc_lport *lport = fip->lp;
2505 struct fc_rport_priv *rdata;
2506 struct fcoe_rport *frport;
2507 int ret = -1;
2508
2509 rdata = lport->tt.rport_lookup(lport, port_id);
2510 if (rdata) {
2511 frport = fcoe_ctlr_rport(rdata);
2512 memcpy(mac, frport->enode_mac, ETH_ALEN);
2513 ret = 0;
2514 kref_put(&rdata->kref, lport->tt.rport_destroy);
2515 }
2516 return ret;
2517 }
2518
2519 /**
2520 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2521 * @fip: The FCoE controller
2522 * @new: newly-parsed remote port with frport as a template for new rdata
2523 *
2524 * Called with ctlr_mutex held.
2525 */
2526 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2527 struct fc_rport_priv *new)
2528 {
2529 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
2530
2531 if (frport->flags & FIP_FL_REC_OR_P2P) {
2532 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2533 return;
2534 }
2535 switch (fip->state) {
2536 case FIP_ST_VNMP_START:
2537 case FIP_ST_VNMP_PROBE1:
2538 case FIP_ST_VNMP_PROBE2:
2539 if (new->ids.port_id == fip->port_id)
2540 fcoe_ctlr_vn_restart(fip);
2541 break;
2542 case FIP_ST_VNMP_CLAIM:
2543 case FIP_ST_VNMP_UP:
2544 if (new->ids.port_id == fip->port_id) {
2545 if (new->ids.port_name > fip->lp->wwpn) {
2546 fcoe_ctlr_vn_restart(fip);
2547 break;
2548 }
2549 fcoe_ctlr_vn_send_claim(fip);
2550 break;
2551 }
2552 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
2553 min((u32)frport->fcoe_len,
2554 fcoe_ctlr_fcoe_size(fip)));
2555 fcoe_ctlr_vn_add(fip, new);
2556 break;
2557 default:
2558 break;
2559 }
2560 }
2561
2562 /**
2563 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2564 * @fip: The FCoE controller that received the frame
2565 * @new: newly-parsed remote port with frport from the Claim Response
2566 *
2567 * Called with ctlr_mutex held.
2568 */
2569 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2570 struct fc_rport_priv *new)
2571 {
2572 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2573 new->ids.port_id, fcoe_ctlr_state(fip->state));
2574 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2575 fcoe_ctlr_vn_add(fip, new);
2576 }
2577
2578 /**
2579 * fcoe_ctlr_vn_beacon() - handle received beacon.
2580 * @fip: The FCoE controller that received the frame
2581 * @new: newly-parsed remote port with frport from the Beacon
2582 *
2583 * Called with ctlr_mutex held.
2584 */
2585 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2586 struct fc_rport_priv *new)
2587 {
2588 struct fc_lport *lport = fip->lp;
2589 struct fc_rport_priv *rdata;
2590 struct fcoe_rport *frport;
2591
2592 frport = fcoe_ctlr_rport(new);
2593 if (frport->flags & FIP_FL_REC_OR_P2P) {
2594 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2595 return;
2596 }
2597 rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
2598 if (rdata) {
2599 if (rdata->ids.node_name == new->ids.node_name &&
2600 rdata->ids.port_name == new->ids.port_name) {
2601 frport = fcoe_ctlr_rport(rdata);
2602 if (!frport->time && fip->state == FIP_ST_VNMP_UP)
2603 lport->tt.rport_login(rdata);
2604 frport->time = jiffies;
2605 }
2606 kref_put(&rdata->kref, lport->tt.rport_destroy);
2607 return;
2608 }
2609 if (fip->state != FIP_ST_VNMP_UP)
2610 return;
2611
2612 /*
2613 * Beacon from a new neighbor.
2614 * Send a claim notify if one hasn't been sent recently.
2615 * Don't add the neighbor yet.
2616 */
2617 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2618 new->ids.port_id);
2619 if (time_after(jiffies,
2620 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2621 fcoe_ctlr_vn_send_claim(fip);
2622 }
2623
2624 /**
2625 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2626 * @fip: The FCoE controller
2627 *
2628 * Called with ctlr_mutex held.
2629 * Called only in state FIP_ST_VNMP_UP.
2630 * Returns the soonest time for next age-out or a time far in the future.
2631 */
2632 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2633 {
2634 struct fc_lport *lport = fip->lp;
2635 struct fc_rport_priv *rdata;
2636 struct fcoe_rport *frport;
2637 unsigned long next_time;
2638 unsigned long deadline;
2639
2640 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2641 mutex_lock(&lport->disc.disc_mutex);
2642 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2643 frport = fcoe_ctlr_rport(rdata);
2644 if (!frport->time)
2645 continue;
2646 deadline = frport->time +
2647 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2648 if (time_after_eq(jiffies, deadline)) {
2649 frport->time = 0;
2650 LIBFCOE_FIP_DBG(fip,
2651 "port %16.16llx fc_id %6.6x beacon expired\n",
2652 rdata->ids.port_name, rdata->ids.port_id);
2653 lport->tt.rport_logoff(rdata);
2654 } else if (time_before(deadline, next_time))
2655 next_time = deadline;
2656 }
2657 mutex_unlock(&lport->disc.disc_mutex);
2658 return next_time;
2659 }
2660
2661 /**
2662 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2663 * @fip: The FCoE controller that received the frame
2664 * @skb: The received FIP frame
2665 *
2666 * Returns non-zero if the frame is dropped.
2667 * Always consumes the frame.
2668 */
2669 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2670 {
2671 struct fip_header *fiph;
2672 enum fip_vn2vn_subcode sub;
2673 struct {
2674 struct fc_rport_priv rdata;
2675 struct fcoe_rport frport;
2676 } buf;
2677 int rc;
2678
2679 fiph = (struct fip_header *)skb->data;
2680 sub = fiph->fip_subcode;
2681
2682 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
2683 if (rc) {
2684 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2685 goto drop;
2686 }
2687
2688 mutex_lock(&fip->ctlr_mutex);
2689 switch (sub) {
2690 case FIP_SC_VN_PROBE_REQ:
2691 fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
2692 break;
2693 case FIP_SC_VN_PROBE_REP:
2694 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
2695 break;
2696 case FIP_SC_VN_CLAIM_NOTIFY:
2697 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
2698 break;
2699 case FIP_SC_VN_CLAIM_REP:
2700 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
2701 break;
2702 case FIP_SC_VN_BEACON:
2703 fcoe_ctlr_vn_beacon(fip, &buf.rdata);
2704 break;
2705 default:
2706 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2707 rc = -1;
2708 break;
2709 }
2710 mutex_unlock(&fip->ctlr_mutex);
2711 drop:
2712 kfree_skb(skb);
2713 return rc;
2714 }
2715
2716 /**
2717 * fcoe_ctlr_vlan_parse - parse vlan discovery request or response
2718 * @fip: The FCoE controller
2719 * @skb: incoming packet
2720 * @rdata: buffer for resulting parsed VLAN entry plus fcoe_rport
2721 *
2722 * Returns non-zero error number on error.
2723 * Does not consume the packet.
2724 */
2725 static int fcoe_ctlr_vlan_parse(struct fcoe_ctlr *fip,
2726 struct sk_buff *skb,
2727 struct fc_rport_priv *rdata)
2728 {
2729 struct fip_header *fiph;
2730 struct fip_desc *desc = NULL;
2731 struct fip_mac_desc *macd = NULL;
2732 struct fip_wwn_desc *wwn = NULL;
2733 struct fcoe_rport *frport;
2734 size_t rlen;
2735 size_t dlen;
2736 u32 desc_mask = 0;
2737 u32 dtype;
2738 u8 sub;
2739
2740 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2741 frport = fcoe_ctlr_rport(rdata);
2742
2743 fiph = (struct fip_header *)skb->data;
2744 frport->flags = ntohs(fiph->fip_flags);
2745
2746 sub = fiph->fip_subcode;
2747 switch (sub) {
2748 case FIP_SC_VL_REQ:
2749 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
2750 break;
2751 default:
2752 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2753 return -EINVAL;
2754 }
2755
2756 rlen = ntohs(fiph->fip_dl_len) * 4;
2757 if (rlen + sizeof(*fiph) > skb->len)
2758 return -EINVAL;
2759
2760 desc = (struct fip_desc *)(fiph + 1);
2761 while (rlen > 0) {
2762 dlen = desc->fip_dlen * FIP_BPW;
2763 if (dlen < sizeof(*desc) || dlen > rlen)
2764 return -EINVAL;
2765
2766 dtype = desc->fip_dtype;
2767 if (dtype < 32) {
2768 if (!(desc_mask & BIT(dtype))) {
2769 LIBFCOE_FIP_DBG(fip,
2770 "unexpected or duplicated desc "
2771 "desc type %u in "
2772 "FIP VN2VN subtype %u\n",
2773 dtype, sub);
2774 return -EINVAL;
2775 }
2776 desc_mask &= ~BIT(dtype);
2777 }
2778
2779 switch (dtype) {
2780 case FIP_DT_MAC:
2781 if (dlen != sizeof(struct fip_mac_desc))
2782 goto len_err;
2783 macd = (struct fip_mac_desc *)desc;
2784 if (!is_valid_ether_addr(macd->fd_mac)) {
2785 LIBFCOE_FIP_DBG(fip,
2786 "Invalid MAC addr %pM in FIP VN2VN\n",
2787 macd->fd_mac);
2788 return -EINVAL;
2789 }
2790 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2791 break;
2792 case FIP_DT_NAME:
2793 if (dlen != sizeof(struct fip_wwn_desc))
2794 goto len_err;
2795 wwn = (struct fip_wwn_desc *)desc;
2796 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2797 break;
2798 default:
2799 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2800 "in FIP probe\n", dtype);
2801 /* standard says ignore unknown descriptors >= 128 */
2802 if (dtype < FIP_DT_NON_CRITICAL)
2803 return -EINVAL;
2804 break;
2805 }
2806 desc = (struct fip_desc *)((char *)desc + dlen);
2807 rlen -= dlen;
2808 }
2809 return 0;
2810
2811 len_err:
2812 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2813 dtype, dlen);
2814 return -EINVAL;
2815 }
2816
2817 /**
2818 * fcoe_ctlr_vlan_send() - Send a FIP VLAN Notification
2819 * @fip: The FCoE controller
2820 * @sub: sub-opcode for vlan notification or vn2vn vlan notification
2821 * @dest: The destination Ethernet MAC address
2822 * @min_len: minimum size of the Ethernet payload to be sent
2823 */
2824 static void fcoe_ctlr_vlan_send(struct fcoe_ctlr *fip,
2825 enum fip_vlan_subcode sub,
2826 const u8 *dest)
2827 {
2828 struct sk_buff *skb;
2829 struct fip_vlan_notify_frame {
2830 struct ethhdr eth;
2831 struct fip_header fip;
2832 struct fip_mac_desc mac;
2833 struct fip_vlan_desc vlan;
2834 } __packed * frame;
2835 size_t len;
2836 size_t dlen;
2837
2838 len = sizeof(*frame);
2839 dlen = sizeof(frame->mac) + sizeof(frame->vlan);
2840 len = max(len, sizeof(struct ethhdr));
2841
2842 skb = dev_alloc_skb(len);
2843 if (!skb)
2844 return;
2845
2846 LIBFCOE_FIP_DBG(fip, "fip %s vlan notification, vlan %d\n",
2847 fip->mode == FIP_MODE_VN2VN ? "vn2vn" : "fcf",
2848 fip->lp->vlan);
2849
2850 frame = (struct fip_vlan_notify_frame *)skb->data;
2851 memset(frame, 0, len);
2852 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2853
2854 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2855 frame->eth.h_proto = htons(ETH_P_FIP);
2856
2857 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2858 frame->fip.fip_op = htons(FIP_OP_VLAN);
2859 frame->fip.fip_subcode = sub;
2860 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2861
2862 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2863 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2864 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2865
2866 frame->vlan.fd_desc.fip_dtype = FIP_DT_VLAN;
2867 frame->vlan.fd_desc.fip_dlen = sizeof(frame->vlan) / FIP_BPW;
2868 put_unaligned_be16(fip->lp->vlan, &frame->vlan.fd_vlan);
2869
2870 skb_put(skb, len);
2871 skb->protocol = htons(ETH_P_FIP);
2872 skb->priority = fip->priority;
2873 skb_reset_mac_header(skb);
2874 skb_reset_network_header(skb);
2875
2876 fip->send(fip, skb);
2877 }
2878
2879 /**
2880 * fcoe_ctlr_vlan_disk_reply() - send FIP VLAN Discovery Notification.
2881 * @fip: The FCoE controller
2882 *
2883 * Called with ctlr_mutex held.
2884 */
2885 static void fcoe_ctlr_vlan_disc_reply(struct fcoe_ctlr *fip,
2886 struct fc_rport_priv *rdata)
2887 {
2888 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2889 enum fip_vlan_subcode sub = FIP_SC_VL_NOTE;
2890
2891 if (fip->mode == FIP_MODE_VN2VN)
2892 sub = FIP_SC_VL_VN2VN_NOTE;
2893
2894 fcoe_ctlr_vlan_send(fip, sub, frport->enode_mac);
2895 }
2896
2897 /**
2898 * fcoe_ctlr_vlan_recv - vlan request receive handler for VN2VN mode.
2899 * @lport: The local port
2900 * @fp: The received frame
2901 *
2902 */
2903 static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2904 {
2905 struct fip_header *fiph;
2906 enum fip_vlan_subcode sub;
2907 struct {
2908 struct fc_rport_priv rdata;
2909 struct fcoe_rport frport;
2910 } buf;
2911 int rc;
2912
2913 fiph = (struct fip_header *)skb->data;
2914 sub = fiph->fip_subcode;
2915 rc = fcoe_ctlr_vlan_parse(fip, skb, &buf.rdata);
2916 if (rc) {
2917 LIBFCOE_FIP_DBG(fip, "vlan_recv vlan_parse error %d\n", rc);
2918 goto drop;
2919 }
2920 mutex_lock(&fip->ctlr_mutex);
2921 if (sub == FIP_SC_VL_REQ)
2922 fcoe_ctlr_vlan_disc_reply(fip, &buf.rdata);
2923 mutex_unlock(&fip->ctlr_mutex);
2924
2925 drop:
2926 kfree_skb(skb);
2927 return rc;
2928 }
2929
2930 /**
2931 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2932 * @lport: The local port
2933 * @fp: The received frame
2934 *
2935 * This should never be called since we don't see RSCNs or other
2936 * fabric-generated ELSes.
2937 */
2938 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2939 {
2940 struct fc_seq_els_data rjt_data;
2941
2942 rjt_data.reason = ELS_RJT_UNSUP;
2943 rjt_data.explan = ELS_EXPL_NONE;
2944 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2945 fc_frame_free(fp);
2946 }
2947
2948 /**
2949 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2950 * @fip: The FCoE controller
2951 *
2952 * This sets a flag indicating that remote ports should be created
2953 * and started for the peers we discover. We use the disc_callback
2954 * pointer as that flag. Peers already discovered are created here.
2955 *
2956 * The lport lock is held during this call. The callback must be done
2957 * later, without holding either the lport or discovery locks.
2958 * The fcoe_ctlr lock may also be held during this call.
2959 */
2960 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2961 enum fc_disc_event),
2962 struct fc_lport *lport)
2963 {
2964 struct fc_disc *disc = &lport->disc;
2965 struct fcoe_ctlr *fip = disc->priv;
2966
2967 mutex_lock(&disc->disc_mutex);
2968 disc->disc_callback = callback;
2969 disc->disc_id = (disc->disc_id + 2) | 1;
2970 disc->pending = 1;
2971 schedule_work(&fip->timer_work);
2972 mutex_unlock(&disc->disc_mutex);
2973 }
2974
2975 /**
2976 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2977 * @fip: The FCoE controller
2978 *
2979 * Starts the FLOGI and PLOGI login process to each discovered rport for which
2980 * we've received at least one beacon.
2981 * Performs the discovery complete callback.
2982 */
2983 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
2984 {
2985 struct fc_lport *lport = fip->lp;
2986 struct fc_disc *disc = &lport->disc;
2987 struct fc_rport_priv *rdata;
2988 struct fcoe_rport *frport;
2989 void (*callback)(struct fc_lport *, enum fc_disc_event);
2990
2991 mutex_lock(&disc->disc_mutex);
2992 callback = disc->pending ? disc->disc_callback : NULL;
2993 disc->pending = 0;
2994 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
2995 frport = fcoe_ctlr_rport(rdata);
2996 if (frport->time)
2997 lport->tt.rport_login(rdata);
2998 }
2999 mutex_unlock(&disc->disc_mutex);
3000 if (callback)
3001 callback(lport, DISC_EV_SUCCESS);
3002 }
3003
3004 /**
3005 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
3006 * @fip: The FCoE controller
3007 */
3008 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
3009 {
3010 unsigned long next_time;
3011 u8 mac[ETH_ALEN];
3012 u32 new_port_id = 0;
3013
3014 mutex_lock(&fip->ctlr_mutex);
3015 switch (fip->state) {
3016 case FIP_ST_VNMP_START:
3017 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
3018 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
3019 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
3020 break;
3021 case FIP_ST_VNMP_PROBE1:
3022 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
3023 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
3024 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3025 break;
3026 case FIP_ST_VNMP_PROBE2:
3027 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
3028 new_port_id = fip->port_id;
3029 hton24(mac, FIP_VN_FC_MAP);
3030 hton24(mac + 3, new_port_id);
3031 fcoe_ctlr_map_dest(fip);
3032 fip->update_mac(fip->lp, mac);
3033 fcoe_ctlr_vn_send_claim(fip);
3034 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3035 break;
3036 case FIP_ST_VNMP_CLAIM:
3037 /*
3038 * This may be invoked either by starting discovery so don't
3039 * go to the next state unless it's been long enough.
3040 */
3041 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3042 if (time_after_eq(jiffies, next_time)) {
3043 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
3044 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
3045 fcoe_all_vn2vn, 0);
3046 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3047 fip->port_ka_time = next_time;
3048 }
3049 fcoe_ctlr_vn_disc(fip);
3050 break;
3051 case FIP_ST_VNMP_UP:
3052 next_time = fcoe_ctlr_vn_age(fip);
3053 if (time_after_eq(jiffies, fip->port_ka_time)) {
3054 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
3055 fcoe_all_vn2vn, 0);
3056 fip->port_ka_time = jiffies +
3057 msecs_to_jiffies(FIP_VN_BEACON_INT +
3058 (prandom_u32() % FIP_VN_BEACON_FUZZ));
3059 }
3060 if (time_before(fip->port_ka_time, next_time))
3061 next_time = fip->port_ka_time;
3062 break;
3063 case FIP_ST_LINK_WAIT:
3064 goto unlock;
3065 default:
3066 WARN(1, "unexpected state %d\n", fip->state);
3067 goto unlock;
3068 }
3069 mod_timer(&fip->timer, next_time);
3070 unlock:
3071 mutex_unlock(&fip->ctlr_mutex);
3072
3073 /* If port ID is new, notify local port after dropping ctlr_mutex */
3074 if (new_port_id)
3075 fc_lport_set_local_id(fip->lp, new_port_id);
3076 }
3077
3078 /**
3079 * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode
3080 * @lport: The local port to be (re)configured
3081 * @fip: The FCoE controller whose mode is changing
3082 * @fip_mode: The new fip mode
3083 *
3084 * Note that the we shouldn't be changing the libfc discovery settings
3085 * (fc_disc_config) while an lport is going through the libfc state
3086 * machine. The mode can only be changed when a fcoe_ctlr device is
3087 * disabled, so that should ensure that this routine is only called
3088 * when nothing is happening.
3089 */
3090 static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
3091 enum fip_mode fip_mode)
3092 {
3093 void *priv;
3094
3095 WARN_ON(lport->state != LPORT_ST_RESET &&
3096 lport->state != LPORT_ST_DISABLED);
3097
3098 if (fip_mode == FIP_MODE_VN2VN) {
3099 lport->rport_priv_size = sizeof(struct fcoe_rport);
3100 lport->point_to_multipoint = 1;
3101 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
3102 lport->tt.disc_start = fcoe_ctlr_disc_start;
3103 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
3104 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
3105 priv = fip;
3106 } else {
3107 lport->rport_priv_size = 0;
3108 lport->point_to_multipoint = 0;
3109 lport->tt.disc_recv_req = NULL;
3110 lport->tt.disc_start = NULL;
3111 lport->tt.disc_stop = NULL;
3112 lport->tt.disc_stop_final = NULL;
3113 priv = lport;
3114 }
3115
3116 fc_disc_config(lport, priv);
3117 }
3118
3119 /**
3120 * fcoe_libfc_config() - Sets up libfc related properties for local port
3121 * @lport: The local port to configure libfc for
3122 * @fip: The FCoE controller in use by the local port
3123 * @tt: The libfc function template
3124 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
3125 *
3126 * Returns : 0 for success
3127 */
3128 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
3129 const struct libfc_function_template *tt, int init_fcp)
3130 {
3131 /* Set the function pointers set by the LLDD */
3132 memcpy(&lport->tt, tt, sizeof(*tt));
3133 if (init_fcp && fc_fcp_init(lport))
3134 return -ENOMEM;
3135 fc_exch_init(lport);
3136 fc_elsct_init(lport);
3137 fc_lport_init(lport);
3138 fc_rport_init(lport);
3139 fc_disc_init(lport);
3140 fcoe_ctlr_mode_set(lport, fip, fip->mode);
3141 return 0;
3142 }
3143 EXPORT_SYMBOL_GPL(fcoe_libfc_config);
3144
3145 void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev)
3146 {
3147 struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
3148 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
3149 struct fcoe_fcf *fcf;
3150
3151 mutex_lock(&fip->ctlr_mutex);
3152 mutex_lock(&ctlr_dev->lock);
3153
3154 fcf = fcoe_fcf_device_priv(fcf_dev);
3155 if (fcf)
3156 fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0;
3157 else
3158 fcf_dev->selected = 0;
3159
3160 mutex_unlock(&ctlr_dev->lock);
3161 mutex_unlock(&fip->ctlr_mutex);
3162 }
3163 EXPORT_SYMBOL(fcoe_fcf_get_selected);
3164
3165 void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)
3166 {
3167 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
3168 struct fc_lport *lport = ctlr->lp;
3169
3170 mutex_lock(&ctlr->ctlr_mutex);
3171 switch (ctlr_dev->mode) {
3172 case FIP_CONN_TYPE_VN2VN:
3173 ctlr->mode = FIP_MODE_VN2VN;
3174 break;
3175 case FIP_CONN_TYPE_FABRIC:
3176 default:
3177 ctlr->mode = FIP_MODE_FABRIC;
3178 break;
3179 }
3180
3181 mutex_unlock(&ctlr->ctlr_mutex);
3182
3183 fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode);
3184 }
3185 EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);
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