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