Commit | Line | Data |
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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
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 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
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> | |
e10f8c66 | 42 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
43 | |
44 | #include <scsi/libfc.h> | |
97c8389d | 45 | #include <scsi/libfcoe.h> |
9b34ecff | 46 | |
21b7b2f5 YZ |
47 | #include "libfcoe.h" |
48 | ||
97c8389d JE |
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); | |
42913657 | 53 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d | 54 | static void fcoe_ctlr_recv_work(struct work_struct *); |
794d98e7 | 55 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); |
97c8389d | 56 | |
e10f8c66 JE |
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 | ||
97c8389d | 62 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
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; | |
97c8389d | 66 | |
0095a921 | 67 | static const char * const fcoe_ctlr_states[] = { |
9b651da9 JE |
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", | |
e10f8c66 JE |
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", | |
9b651da9 JE |
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 | ||
70b51aab RL |
106 | /** |
107 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
108 | * @fcf: The FCF to check | |
109 | * | |
97c8389d JE |
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 | ||
70b51aab RL |
117 | /** |
118 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
119 | * @fcf: The FCF to check | |
120 | * | |
97c8389d JE |
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 | ||
cd229e42 JE |
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 | ||
97c8389d | 144 | /** |
70b51aab RL |
145 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
146 | * @fip: The FCoE controller to initialize | |
97c8389d | 147 | */ |
3d902ac0 | 148 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 149 | { |
9b651da9 | 150 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 151 | fip->mode = mode; |
97c8389d | 152 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 153 | mutex_init(&fip->ctlr_mutex); |
794d98e7 | 154 | spin_lock_init(&fip->ctlr_lock); |
97c8389d JE |
155 | fip->flogi_oxid = FC_XID_UNKNOWN; |
156 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 157 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
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 | ||
9d34876f RL |
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 | */ | |
8d55e507 RL |
169 | static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new) |
170 | { | |
171 | struct fcoe_ctlr *fip = new->fip; | |
9d34876f | 172 | struct fcoe_ctlr_device *ctlr_dev; |
1c2c1b4f BVA |
173 | struct fcoe_fcf_device *temp, *fcf_dev; |
174 | int rc = -ENOMEM; | |
8d55e507 RL |
175 | |
176 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
177 | new->fabric_name, new->fcf_mac); | |
178 | ||
1c2c1b4f BVA |
179 | temp = kzalloc(sizeof(*temp), GFP_KERNEL); |
180 | if (!temp) | |
181 | goto out; | |
182 | ||
1c2c1b4f BVA |
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 | ||
8d55e507 | 192 | /* |
9d34876f RL |
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. | |
8d55e507 | 198 | */ |
8d55e507 | 199 | |
9d34876f RL |
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; | |
55d0ac5d | 206 | mutex_unlock(&ctlr_dev->lock); |
9d34876f RL |
207 | goto out; |
208 | } | |
209 | ||
210 | /* | |
211 | * The fcoe_sysfs layer can return a CONNECTED fcf that | |
212 | * has a priv (fcf was never deleted) or a CONNECTED fcf | |
213 | * that doesn't have a priv (fcf was deleted). However, | |
214 | * libfcoe will always delete FCFs before trying to add | |
215 | * them. This is ensured because both recv_adv and | |
216 | * age_fcfs are protected by the the fcoe_ctlr's mutex. | |
217 | * This means that we should never get a FCF with a | |
218 | * non-NULL priv pointer. | |
219 | */ | |
220 | BUG_ON(fcf_dev->priv); | |
221 | ||
222 | fcf_dev->priv = new; | |
223 | new->fcf_dev = fcf_dev; | |
224 | mutex_unlock(&ctlr_dev->lock); | |
225 | } | |
8d55e507 RL |
226 | |
227 | list_add(&new->list, &fip->fcfs); | |
228 | fip->fcf_count++; | |
1c2c1b4f | 229 | rc = 0; |
8d55e507 | 230 | |
1c2c1b4f BVA |
231 | out: |
232 | kfree(temp); | |
8d55e507 RL |
233 | return rc; |
234 | } | |
235 | ||
9d34876f RL |
236 | /** |
237 | * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device} | |
238 | * @new: The FCF to be removed | |
239 | * | |
240 | * Called with fip->ctlr_mutex held | |
241 | */ | |
8d55e507 RL |
242 | static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new) |
243 | { | |
244 | struct fcoe_ctlr *fip = new->fip; | |
9d34876f | 245 | struct fcoe_ctlr_device *cdev; |
8d55e507 RL |
246 | struct fcoe_fcf_device *fcf_dev; |
247 | ||
248 | list_del(&new->list); | |
249 | fip->fcf_count--; | |
250 | ||
9d34876f RL |
251 | /* |
252 | * If ctlr_dev doesn't exist then it means we're a libfcoe user | |
253 | * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device | |
254 | * or a fcoe_fcf_device. | |
255 | * | |
256 | * fnic would be an example of a driver with this behavior. In this | |
257 | * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above), | |
258 | * but we don't want to make sysfs changes. | |
259 | */ | |
260 | cdev = fcoe_ctlr_to_ctlr_dev(fip); | |
261 | if (cdev) { | |
262 | mutex_lock(&cdev->lock); | |
263 | fcf_dev = fcoe_fcf_to_fcf_dev(new); | |
264 | WARN_ON(!fcf_dev); | |
265 | new->fcf_dev = NULL; | |
266 | fcoe_fcf_device_delete(fcf_dev); | |
267 | kfree(new); | |
268 | mutex_unlock(&cdev->lock); | |
269 | } | |
8d55e507 RL |
270 | } |
271 | ||
97c8389d | 272 | /** |
70b51aab RL |
273 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
274 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
275 | * |
276 | * Called with &fcoe_ctlr lock held. | |
277 | */ | |
278 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
279 | { | |
280 | struct fcoe_fcf *fcf; | |
281 | struct fcoe_fcf *next; | |
282 | ||
283 | fip->sel_fcf = NULL; | |
284 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
8d55e507 | 285 | fcoe_sysfs_fcf_del(fcf); |
97c8389d | 286 | } |
8d55e507 RL |
287 | WARN_ON(fip->fcf_count); |
288 | ||
97c8389d JE |
289 | fip->sel_time = 0; |
290 | } | |
291 | ||
292 | /** | |
70b51aab RL |
293 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
294 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
295 | * |
296 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
297 | * | |
298 | * The receive handler will have been deleted before this to guarantee | |
299 | * that no more recv_work will be scheduled. | |
300 | * | |
301 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
302 | * This guarantees that no further timeouts or work will be scheduled. | |
303 | */ | |
304 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
305 | { | |
a4b7cfae | 306 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 307 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 308 | |
fdb068c6 | 309 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 310 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 311 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 312 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 313 | del_timer_sync(&fip->timer); |
42913657 | 314 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
315 | } |
316 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
317 | ||
69316ee2 | 318 | /** |
794d98e7 | 319 | * fcoe_ctlr_announce() - announce new FCF selection |
69316ee2 JE |
320 | * @fip: The FCoE controller |
321 | * | |
322 | * Also sets the destination MAC for FCoE and control packets | |
794d98e7 JE |
323 | * |
324 | * Called with neither ctlr_mutex nor ctlr_lock held. | |
69316ee2 JE |
325 | */ |
326 | static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) | |
327 | { | |
794d98e7 JE |
328 | struct fcoe_fcf *sel; |
329 | struct fcoe_fcf *fcf; | |
330 | ||
331 | mutex_lock(&fip->ctlr_mutex); | |
332 | spin_lock_bh(&fip->ctlr_lock); | |
333 | ||
334 | kfree_skb(fip->flogi_req); | |
335 | fip->flogi_req = NULL; | |
336 | list_for_each_entry(fcf, &fip->fcfs, list) | |
337 | fcf->flogi_sent = 0; | |
338 | ||
339 | spin_unlock_bh(&fip->ctlr_lock); | |
340 | sel = fip->sel_fcf; | |
69316ee2 | 341 | |
6942df7f | 342 | if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr)) |
794d98e7 | 343 | goto unlock; |
69316ee2 JE |
344 | if (!is_zero_ether_addr(fip->dest_addr)) { |
345 | printk(KERN_NOTICE "libfcoe: host%d: " | |
346 | "FIP Fibre-Channel Forwarder MAC %pM deselected\n", | |
347 | fip->lp->host->host_no, fip->dest_addr); | |
348 | memset(fip->dest_addr, 0, ETH_ALEN); | |
349 | } | |
350 | if (sel) { | |
351 | printk(KERN_INFO "libfcoe: host%d: FIP selected " | |
352 | "Fibre-Channel Forwarder MAC %pM\n", | |
353 | fip->lp->host->host_no, sel->fcf_mac); | |
81c11dd2 | 354 | memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN); |
69316ee2 JE |
355 | fip->map_dest = 0; |
356 | } | |
794d98e7 JE |
357 | unlock: |
358 | mutex_unlock(&fip->ctlr_mutex); | |
69316ee2 JE |
359 | } |
360 | ||
97c8389d | 361 | /** |
70b51aab RL |
362 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
363 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
364 | * |
365 | * Returns the maximum packet size including the FCoE header and trailer, | |
366 | * but not including any Ethernet or VLAN headers. | |
367 | */ | |
368 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
369 | { | |
370 | /* | |
371 | * Determine the max FCoE frame size allowed, including | |
372 | * FCoE header and trailer. | |
373 | * Note: lp->mfs is currently the payload size, not the frame size. | |
374 | */ | |
375 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
376 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
377 | } | |
378 | ||
379 | /** | |
70b51aab RL |
380 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
381 | * @fip: The FCoE controller to send the solicitation on | |
382 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
383 | */ |
384 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
385 | { | |
386 | struct sk_buff *skb; | |
387 | struct fip_sol { | |
388 | struct ethhdr eth; | |
389 | struct fip_header fip; | |
390 | struct { | |
391 | struct fip_mac_desc mac; | |
392 | struct fip_wwn_desc wwnn; | |
393 | struct fip_size_desc size; | |
0095a921 YZ |
394 | } __packed desc; |
395 | } __packed * sol; | |
97c8389d JE |
396 | u32 fcoe_size; |
397 | ||
398 | skb = dev_alloc_skb(sizeof(*sol)); | |
399 | if (!skb) | |
400 | return; | |
401 | ||
402 | sol = (struct fip_sol *)skb->data; | |
403 | ||
404 | memset(sol, 0, sizeof(*sol)); | |
405 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
406 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
407 | sol->eth.h_proto = htons(ETH_P_FIP); | |
408 | ||
409 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
410 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
411 | sol->fip.fip_subcode = FIP_SC_SOL; | |
412 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
413 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
414 | if (fip->spma) |
415 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
416 | |
417 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
418 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
419 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
420 | ||
421 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
422 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
423 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
424 | ||
425 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
426 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
427 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
428 | sol->desc.size.fd_size = htons(fcoe_size); | |
429 | ||
430 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 431 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 432 | skb->priority = fip->priority; |
97c8389d JE |
433 | skb_reset_mac_header(skb); |
434 | skb_reset_network_header(skb); | |
435 | fip->send(fip, skb); | |
436 | ||
437 | if (!fcf) | |
438 | fip->sol_time = jiffies; | |
439 | } | |
440 | ||
441 | /** | |
70b51aab RL |
442 | * fcoe_ctlr_link_up() - Start FCoE controller |
443 | * @fip: The FCoE controller to start | |
97c8389d JE |
444 | * |
445 | * Called from the LLD when the network link is ready. | |
446 | */ | |
447 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
448 | { | |
fdb068c6 | 449 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 450 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 451 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
452 | fc_linkup(fip->lp); |
453 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 454 | fcoe_ctlr_set_state(fip, fip->mode); |
e10f8c66 JE |
455 | switch (fip->mode) { |
456 | default: | |
457 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
458 | /* fall-through */ | |
459 | case FIP_MODE_AUTO: | |
0f51c2e5 | 460 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
461 | /* fall-through */ |
462 | case FIP_MODE_FABRIC: | |
463 | case FIP_MODE_NON_FIP: | |
464 | mutex_unlock(&fip->ctlr_mutex); | |
465 | fc_linkup(fip->lp); | |
466 | fcoe_ctlr_solicit(fip, NULL); | |
467 | break; | |
468 | case FIP_MODE_VN2VN: | |
469 | fcoe_ctlr_vn_start(fip); | |
470 | mutex_unlock(&fip->ctlr_mutex); | |
471 | fc_linkup(fip->lp); | |
472 | break; | |
473 | } | |
97c8389d | 474 | } else |
fdb068c6 | 475 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
476 | } |
477 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
478 | ||
479 | /** | |
70b51aab RL |
480 | * fcoe_ctlr_reset() - Reset a FCoE controller |
481 | * @fip: The FCoE controller to reset | |
97c8389d | 482 | */ |
dd42dac4 | 483 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 484 | { |
97c8389d JE |
485 | fcoe_ctlr_reset_fcfs(fip); |
486 | del_timer(&fip->timer); | |
97c8389d JE |
487 | fip->ctlr_ka_time = 0; |
488 | fip->port_ka_time = 0; | |
489 | fip->sol_time = 0; | |
490 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
cd229e42 | 491 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
492 | } |
493 | ||
494 | /** | |
70b51aab RL |
495 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
496 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
497 | * |
498 | * Returns non-zero if the link was up and now isn't. | |
499 | * | |
500 | * Called from the LLD when the network link is not ready. | |
501 | * There may be multiple calls while the link is down. | |
502 | */ | |
503 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
504 | { | |
dd42dac4 JE |
505 | int link_dropped; |
506 | ||
507 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 508 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 509 | fcoe_ctlr_reset(fip); |
42913657 | 510 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 511 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 512 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
513 | |
514 | if (link_dropped) | |
515 | fc_linkdown(fip->lp); | |
516 | return link_dropped; | |
97c8389d JE |
517 | } |
518 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
519 | ||
520 | /** | |
70b51aab RL |
521 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
522 | * @fip: The FCoE controller to send the FKA on | |
523 | * @lport: libfc fc_lport to send from | |
524 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
525 | * @sa: The source MAC address | |
97c8389d JE |
526 | * |
527 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
528 | * The source MAC is the native MAC address. | |
529 | * | |
530 | * A port keep-alive is sent every 90 seconds while logged in. | |
531 | * The source MAC is the assigned mapped source address. | |
532 | * The destination is the FCF's F-port. | |
533 | */ | |
11b56188 CL |
534 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
535 | struct fc_lport *lport, | |
536 | int ports, u8 *sa) | |
97c8389d JE |
537 | { |
538 | struct sk_buff *skb; | |
539 | struct fip_kal { | |
540 | struct ethhdr eth; | |
541 | struct fip_header fip; | |
542 | struct fip_mac_desc mac; | |
0095a921 | 543 | } __packed * kal; |
97c8389d JE |
544 | struct fip_vn_desc *vn; |
545 | u32 len; | |
546 | struct fc_lport *lp; | |
547 | struct fcoe_fcf *fcf; | |
548 | ||
549 | fcf = fip->sel_fcf; | |
550 | lp = fip->lp; | |
281ae642 | 551 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
552 | return; |
553 | ||
be276cbe | 554 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
555 | skb = dev_alloc_skb(len); |
556 | if (!skb) | |
557 | return; | |
558 | ||
559 | kal = (struct fip_kal *)skb->data; | |
560 | memset(kal, 0, len); | |
561 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
562 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
563 | kal->eth.h_proto = htons(ETH_P_FIP); | |
564 | ||
565 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
566 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
567 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
568 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 569 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 570 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
571 | if (fip->spma) |
572 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
573 | |
574 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
575 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
576 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
577 | if (ports) { |
578 | vn = (struct fip_vn_desc *)(kal + 1); | |
579 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
580 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 581 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
582 | hton24(vn->fd_fc_id, lport->port_id); |
583 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 584 | } |
97c8389d | 585 | skb_put(skb, len); |
0f491539 | 586 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 587 | skb->priority = fip->priority; |
97c8389d JE |
588 | skb_reset_mac_header(skb); |
589 | skb_reset_network_header(skb); | |
590 | fip->send(fip, skb); | |
591 | } | |
592 | ||
593 | /** | |
70b51aab RL |
594 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
595 | * @fip: The FCoE controller for the ELS frame | |
596 | * @dtype: The FIP descriptor type for the frame | |
597 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 598 | * @d_id: The destination port ID. |
97c8389d JE |
599 | * |
600 | * Returns non-zero error code on failure. | |
601 | * | |
602 | * The caller must check that the length is a multiple of 4. | |
603 | * | |
604 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
605 | * Headroom includes the FIP encapsulation description, FIP header, and | |
606 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
607 | */ | |
11b56188 | 608 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 609 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
610 | { |
611 | struct fip_encaps_head { | |
612 | struct ethhdr eth; | |
613 | struct fip_header fip; | |
614 | struct fip_encaps encaps; | |
0095a921 | 615 | } __packed * cap; |
5554345b | 616 | struct fc_frame_header *fh; |
97c8389d JE |
617 | struct fip_mac_desc *mac; |
618 | struct fcoe_fcf *fcf; | |
619 | size_t dlen; | |
5a84baea | 620 | u16 fip_flags; |
5554345b | 621 | u8 op; |
97c8389d | 622 | |
5554345b JE |
623 | fh = (struct fc_frame_header *)skb->data; |
624 | op = *(u8 *)(fh + 1); | |
97c8389d JE |
625 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
626 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
97c8389d | 627 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
628 | |
629 | if (lport->point_to_multipoint) { | |
630 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
631 | return -ENODEV; | |
5554345b | 632 | fip_flags = 0; |
e10f8c66 JE |
633 | } else { |
634 | fcf = fip->sel_fcf; | |
635 | if (!fcf) | |
636 | return -ENODEV; | |
637 | fip_flags = fcf->flags; | |
638 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
639 | FIP_FL_FPMA; | |
640 | if (!fip_flags) | |
641 | return -ENODEV; | |
642 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
643 | } | |
97c8389d JE |
644 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
645 | cap->eth.h_proto = htons(ETH_P_FIP); | |
646 | ||
647 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
648 | cap->fip.fip_op = htons(FIP_OP_LS); | |
5554345b JE |
649 | if (op == ELS_LS_ACC || op == ELS_LS_RJT) |
650 | cap->fip.fip_subcode = FIP_SC_REP; | |
651 | else | |
652 | cap->fip.fip_subcode = FIP_SC_REQ; | |
5a84baea | 653 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
654 | |
655 | cap->encaps.fd_desc.fip_dtype = dtype; | |
656 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
657 | ||
5554345b JE |
658 | if (op != ELS_LS_RJT) { |
659 | dlen += sizeof(*mac); | |
660 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
661 | memset(mac, 0, sizeof(*mac)); | |
662 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
663 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
664 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { | |
665 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); | |
666 | } else if (fip->mode == FIP_MODE_VN2VN) { | |
667 | hton24(mac->fd_mac, FIP_VN_FC_MAP); | |
668 | hton24(mac->fd_mac + 3, fip->port_id); | |
669 | } else if (fip_flags & FIP_FL_SPMA) { | |
670 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
671 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
672 | } else { | |
673 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
674 | /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ | |
675 | } | |
593abc07 | 676 | } |
5554345b | 677 | cap->fip.fip_dl_len = htons(dlen / FIP_BPW); |
97c8389d | 678 | |
0f491539 | 679 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 680 | skb->priority = fip->priority; |
97c8389d JE |
681 | skb_reset_mac_header(skb); |
682 | skb_reset_network_header(skb); | |
683 | return 0; | |
684 | } | |
685 | ||
686 | /** | |
687 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
688 | * @fip: FCoE controller. | |
11b56188 | 689 | * @lport: libfc fc_lport to send from |
97c8389d JE |
690 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
691 | * | |
692 | * Returns a non-zero error code if the frame should not be sent. | |
693 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
694 | * | |
695 | * The caller must check that the length is a multiple of 4. | |
696 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 697 | * The the skb must also be an fc_frame. |
794d98e7 JE |
698 | * |
699 | * This is called from the lower-level driver with spinlocks held, | |
700 | * so we must not take a mutex here. | |
97c8389d | 701 | */ |
11b56188 CL |
702 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
703 | struct sk_buff *skb) | |
97c8389d | 704 | { |
e10f8c66 | 705 | struct fc_frame *fp; |
97c8389d JE |
706 | struct fc_frame_header *fh; |
707 | u16 old_xid; | |
708 | u8 op; | |
11b56188 | 709 | u8 mac[ETH_ALEN]; |
97c8389d | 710 | |
e10f8c66 | 711 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
712 | fh = (struct fc_frame_header *)skb->data; |
713 | op = *(u8 *)(fh + 1); | |
714 | ||
e10f8c66 | 715 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
716 | old_xid = fip->flogi_oxid; |
717 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
718 | if (fip->state == FIP_ST_AUTO) { | |
719 | if (old_xid == FC_XID_UNKNOWN) | |
720 | fip->flogi_count = 0; | |
721 | fip->flogi_count++; | |
722 | if (fip->flogi_count < 3) | |
723 | goto drop; | |
cd229e42 | 724 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
725 | return 0; |
726 | } | |
5f48f70e | 727 | if (fip->state == FIP_ST_NON_FIP) |
cd229e42 | 728 | fcoe_ctlr_map_dest(fip); |
5f48f70e JE |
729 | } |
730 | ||
731 | if (fip->state == FIP_ST_NON_FIP) | |
732 | return 0; | |
e10f8c66 | 733 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 734 | goto drop; |
5f48f70e JE |
735 | switch (op) { |
736 | case ELS_FLOGI: | |
97c8389d | 737 | op = FIP_DT_FLOGI; |
794d98e7 JE |
738 | if (fip->mode == FIP_MODE_VN2VN) |
739 | break; | |
740 | spin_lock_bh(&fip->ctlr_lock); | |
741 | kfree_skb(fip->flogi_req); | |
742 | fip->flogi_req = skb; | |
743 | fip->flogi_req_send = 1; | |
744 | spin_unlock_bh(&fip->ctlr_lock); | |
745 | schedule_work(&fip->timer_work); | |
746 | return -EINPROGRESS; | |
97c8389d JE |
747 | case ELS_FDISC: |
748 | if (ntoh24(fh->fh_s_id)) | |
749 | return 0; | |
750 | op = FIP_DT_FDISC; | |
751 | break; | |
752 | case ELS_LOGO: | |
e10f8c66 JE |
753 | if (fip->mode == FIP_MODE_VN2VN) { |
754 | if (fip->state != FIP_ST_VNMP_UP) | |
755 | return -EINVAL; | |
756 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) | |
757 | return -EINVAL; | |
758 | } else { | |
759 | if (fip->state != FIP_ST_ENABLED) | |
760 | return 0; | |
761 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
762 | return 0; | |
763 | } | |
97c8389d JE |
764 | op = FIP_DT_LOGO; |
765 | break; | |
766 | case ELS_LS_ACC: | |
97c8389d | 767 | /* |
e10f8c66 | 768 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
769 | * from a point-to-point connection. Switch to using |
770 | * the source mac based on the SID. The destination | |
25985edc | 771 | * MAC in this case would have been set by receiving the |
97c8389d JE |
772 | * FLOGI. |
773 | */ | |
e10f8c66 JE |
774 | if (fip->state == FIP_ST_NON_FIP) { |
775 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
776 | return 0; | |
777 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
778 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
779 | fip->update_mac(lport, mac); | |
780 | } | |
781 | /* fall through */ | |
782 | case ELS_LS_RJT: | |
783 | op = fr_encaps(fp); | |
784 | if (op) | |
785 | break; | |
97c8389d JE |
786 | return 0; |
787 | default: | |
e10f8c66 JE |
788 | if (fip->state != FIP_ST_ENABLED && |
789 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
790 | goto drop; |
791 | return 0; | |
792 | } | |
e10f8c66 JE |
793 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
794 | op, ntoh24(fh->fh_d_id)); | |
795 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
796 | goto drop; |
797 | fip->send(fip, skb); | |
798 | return -EINPROGRESS; | |
799 | drop: | |
800 | kfree_skb(skb); | |
801 | return -EINVAL; | |
802 | } | |
803 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
804 | ||
70b51aab RL |
805 | /** |
806 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
807 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 808 | * |
f018b73a | 809 | * Called with lock held and preemption disabled. |
97c8389d | 810 | * |
8690cb83 JE |
811 | * An FCF is considered old if we have missed two advertisements. |
812 | * That is, there have been no valid advertisement from it for 2.5 | |
813 | * times its keep-alive period. | |
97c8389d JE |
814 | * |
815 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
816 | * |
817 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
818 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
819 | * |
820 | * Returns the time in jiffies for the next call. | |
97c8389d | 821 | */ |
8690cb83 | 822 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
823 | { |
824 | struct fcoe_fcf *fcf; | |
825 | struct fcoe_fcf *next; | |
8690cb83 JE |
826 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
827 | unsigned long deadline; | |
97c8389d | 828 | unsigned long sel_time = 0; |
8d55e507 | 829 | struct list_head del_list; |
1bd49b48 | 830 | struct fc_stats *stats; |
97c8389d | 831 | |
8d55e507 RL |
832 | INIT_LIST_HEAD(&del_list); |
833 | ||
1bd49b48 | 834 | stats = per_cpu_ptr(fip->lp->stats, get_cpu()); |
fdb068c6 | 835 | |
97c8389d | 836 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
837 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
838 | if (fip->sel_fcf == fcf) { | |
839 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
840 | stats->MissDiscAdvCount++; |
841 | printk(KERN_INFO "libfcoe: host%d: " | |
842 | "Missing Discovery Advertisement " | |
843 | "for fab %16.16llx count %lld\n", | |
844 | fip->lp->host->host_no, fcf->fabric_name, | |
845 | stats->MissDiscAdvCount); | |
846 | } else if (time_after(next_timer, deadline)) | |
847 | next_timer = deadline; | |
f3da80e7 | 848 | } |
8690cb83 JE |
849 | |
850 | deadline += fcf->fka_period; | |
d99ee45b | 851 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
852 | if (fip->sel_fcf == fcf) |
853 | fip->sel_fcf = NULL; | |
8d55e507 RL |
854 | /* |
855 | * Move to delete list so we can call | |
856 | * fcoe_sysfs_fcf_del (which can sleep) | |
857 | * after the put_cpu(). | |
858 | */ | |
97c8389d | 859 | list_del(&fcf->list); |
8d55e507 | 860 | list_add(&fcf->list, &del_list); |
f018b73a | 861 | stats->VLinkFailureCount++; |
8690cb83 JE |
862 | } else { |
863 | if (time_after(next_timer, deadline)) | |
864 | next_timer = deadline; | |
865 | if (fcoe_ctlr_mtu_valid(fcf) && | |
866 | (!sel_time || time_before(sel_time, fcf->time))) | |
867 | sel_time = fcf->time; | |
97c8389d JE |
868 | } |
869 | } | |
fdb068c6 | 870 | put_cpu(); |
8d55e507 RL |
871 | |
872 | list_for_each_entry_safe(fcf, next, &del_list, list) { | |
873 | /* Removes fcf from current list */ | |
874 | fcoe_sysfs_fcf_del(fcf); | |
875 | } | |
876 | ||
d99ee45b | 877 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
878 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
879 | fip->sel_time = sel_time; | |
97c8389d | 880 | } |
d99ee45b | 881 | |
8690cb83 | 882 | return next_timer; |
97c8389d JE |
883 | } |
884 | ||
885 | /** | |
70b51aab | 886 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 887 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
888 | * @skb: The received FIP advertisement frame |
889 | * @fcf: The resulting FCF entry | |
97c8389d JE |
890 | * |
891 | * Returns zero on a valid parsed advertisement, | |
892 | * otherwise returns non zero value. | |
893 | */ | |
0f51c2e5 JE |
894 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
895 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
896 | { |
897 | struct fip_header *fiph; | |
898 | struct fip_desc *desc = NULL; | |
899 | struct fip_wwn_desc *wwn; | |
900 | struct fip_fab_desc *fab; | |
901 | struct fip_fka_desc *fka; | |
902 | unsigned long t; | |
903 | size_t rlen; | |
904 | size_t dlen; | |
0a9c5d34 | 905 | u32 desc_mask; |
97c8389d JE |
906 | |
907 | memset(fcf, 0, sizeof(*fcf)); | |
908 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
909 | ||
910 | fiph = (struct fip_header *)skb->data; | |
911 | fcf->flags = ntohs(fiph->fip_flags); | |
912 | ||
0a9c5d34 BPG |
913 | /* |
914 | * mask of required descriptors. validating each one clears its bit. | |
915 | */ | |
916 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
917 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
918 | ||
97c8389d JE |
919 | rlen = ntohs(fiph->fip_dl_len) * 4; |
920 | if (rlen + sizeof(*fiph) > skb->len) | |
921 | return -EINVAL; | |
922 | ||
923 | desc = (struct fip_desc *)(fiph + 1); | |
924 | while (rlen > 0) { | |
925 | dlen = desc->fip_dlen * FIP_BPW; | |
926 | if (dlen < sizeof(*desc) || dlen > rlen) | |
927 | return -EINVAL; | |
0a9c5d34 BPG |
928 | /* Drop Adv if there are duplicate critical descriptors */ |
929 | if ((desc->fip_dtype < 32) && | |
930 | !(desc_mask & 1U << desc->fip_dtype)) { | |
931 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
932 | "Descriptors in FIP adv\n"); | |
933 | return -EINVAL; | |
934 | } | |
97c8389d JE |
935 | switch (desc->fip_dtype) { |
936 | case FIP_DT_PRI: | |
937 | if (dlen != sizeof(struct fip_pri_desc)) | |
938 | goto len_err; | |
939 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 940 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
941 | break; |
942 | case FIP_DT_MAC: | |
943 | if (dlen != sizeof(struct fip_mac_desc)) | |
944 | goto len_err; | |
945 | memcpy(fcf->fcf_mac, | |
946 | ((struct fip_mac_desc *)desc)->fd_mac, | |
947 | ETH_ALEN); | |
81c11dd2 | 948 | memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN); |
97c8389d | 949 | if (!is_valid_ether_addr(fcf->fcf_mac)) { |
e10f8c66 JE |
950 | LIBFCOE_FIP_DBG(fip, |
951 | "Invalid MAC addr %pM in FIP adv\n", | |
952 | fcf->fcf_mac); | |
97c8389d JE |
953 | return -EINVAL; |
954 | } | |
0a9c5d34 | 955 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
956 | break; |
957 | case FIP_DT_NAME: | |
958 | if (dlen != sizeof(struct fip_wwn_desc)) | |
959 | goto len_err; | |
960 | wwn = (struct fip_wwn_desc *)desc; | |
961 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 962 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
963 | break; |
964 | case FIP_DT_FAB: | |
965 | if (dlen != sizeof(struct fip_fab_desc)) | |
966 | goto len_err; | |
967 | fab = (struct fip_fab_desc *)desc; | |
968 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
969 | fcf->vfid = ntohs(fab->fd_vfid); | |
970 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 971 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
972 | break; |
973 | case FIP_DT_FKA: | |
974 | if (dlen != sizeof(struct fip_fka_desc)) | |
975 | goto len_err; | |
976 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
977 | if (fka->fd_flags & FIP_FKA_ADV_D) |
978 | fcf->fd_flags = 1; | |
97c8389d JE |
979 | t = ntohl(fka->fd_fka_period); |
980 | if (t >= FCOE_CTLR_MIN_FKA) | |
981 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 982 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
983 | break; |
984 | case FIP_DT_MAP_OUI: | |
985 | case FIP_DT_FCOE_SIZE: | |
986 | case FIP_DT_FLOGI: | |
987 | case FIP_DT_FDISC: | |
988 | case FIP_DT_LOGO: | |
989 | case FIP_DT_ELP: | |
990 | default: | |
0f51c2e5 | 991 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 992 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
993 | /* standard says ignore unknown descriptors >= 128 */ |
994 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
995 | return -EINVAL; | |
1508f3ec | 996 | break; |
97c8389d JE |
997 | } |
998 | desc = (struct fip_desc *)((char *)desc + dlen); | |
999 | rlen -= dlen; | |
1000 | } | |
1001 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
1002 | return -EINVAL; | |
240778e8 | 1003 | if (!fcf->switch_name) |
97c8389d | 1004 | return -EINVAL; |
0a9c5d34 BPG |
1005 | if (desc_mask) { |
1006 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
1007 | desc_mask); | |
1008 | return -EINVAL; | |
1009 | } | |
97c8389d JE |
1010 | return 0; |
1011 | ||
1012 | len_err: | |
0f51c2e5 | 1013 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1014 | desc->fip_dtype, dlen); |
97c8389d JE |
1015 | return -EINVAL; |
1016 | } | |
1017 | ||
1018 | /** | |
70b51aab RL |
1019 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
1020 | * @fip: The FCoE controller receiving the advertisement | |
1021 | * @skb: The received FIP packet | |
97c8389d JE |
1022 | */ |
1023 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1024 | { | |
1025 | struct fcoe_fcf *fcf; | |
1026 | struct fcoe_fcf new; | |
97c8389d JE |
1027 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); |
1028 | int first = 0; | |
1029 | int mtu_valid; | |
8d55e507 RL |
1030 | int found = 0; |
1031 | int rc = 0; | |
97c8389d | 1032 | |
0f51c2e5 | 1033 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
1034 | return; |
1035 | ||
fdb068c6 | 1036 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1037 | first = list_empty(&fip->fcfs); |
97c8389d JE |
1038 | list_for_each_entry(fcf, &fip->fcfs, list) { |
1039 | if (fcf->switch_name == new.switch_name && | |
1040 | fcf->fabric_name == new.fabric_name && | |
1041 | fcf->fc_map == new.fc_map && | |
6942df7f | 1042 | ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) { |
8d55e507 | 1043 | found = 1; |
97c8389d JE |
1044 | break; |
1045 | } | |
1046 | } | |
1047 | if (!found) { | |
1048 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
1049 | goto out; | |
1050 | ||
1051 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
1052 | if (!fcf) | |
1053 | goto out; | |
1054 | ||
97c8389d | 1055 | memcpy(fcf, &new, sizeof(new)); |
8d55e507 RL |
1056 | fcf->fip = fip; |
1057 | rc = fcoe_sysfs_fcf_add(fcf); | |
1058 | if (rc) { | |
1059 | printk(KERN_ERR "Failed to allocate sysfs instance " | |
1060 | "for FCF, fab %16.16llx mac %pM\n", | |
1061 | new.fabric_name, new.fcf_mac); | |
1062 | kfree(fcf); | |
1063 | goto out; | |
1064 | } | |
97c8389d JE |
1065 | } else { |
1066 | /* | |
c600fea2 JE |
1067 | * Update the FCF's keep-alive descriptor flags. |
1068 | * Other flag changes from new advertisements are | |
1069 | * ignored after a solicited advertisement is | |
1070 | * received and the FCF is selectable (usable). | |
97c8389d | 1071 | */ |
c600fea2 JE |
1072 | fcf->fd_flags = new.fd_flags; |
1073 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
1074 | fcf->flags = new.flags; | |
1075 | ||
d99ee45b | 1076 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
1077 | fip->ctlr_ka_time -= fcf->fka_period; |
1078 | fip->ctlr_ka_time += new.fka_period; | |
1079 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1080 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 1081 | } |
97c8389d JE |
1082 | fcf->fka_period = new.fka_period; |
1083 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
1084 | } | |
8d55e507 | 1085 | |
97c8389d JE |
1086 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); |
1087 | fcf->time = jiffies; | |
9069f5c4 JE |
1088 | if (!found) |
1089 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
1090 | fcf->fabric_name, fcf->fcf_mac); | |
97c8389d JE |
1091 | |
1092 | /* | |
1093 | * If this advertisement is not solicited and our max receive size | |
1094 | * hasn't been verified, send a solicited advertisement. | |
1095 | */ | |
1096 | if (!mtu_valid) | |
1097 | fcoe_ctlr_solicit(fip, fcf); | |
1098 | ||
1099 | /* | |
1100 | * If its been a while since we did a solicit, and this is | |
1101 | * the first advertisement we've received, do a multicast | |
1102 | * solicitation to gather as many advertisements as we can | |
1103 | * before selection occurs. | |
1104 | */ | |
1105 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
1106 | fcoe_ctlr_solicit(fip, NULL); | |
1107 | ||
981c1154 JE |
1108 | /* |
1109 | * Put this FCF at the head of the list for priority among equals. | |
1110 | * This helps in the case of an NPV switch which insists we use | |
1111 | * the FCF that answers multicast solicitations, not the others that | |
1112 | * are sending periodic multicast advertisements. | |
1113 | */ | |
63ce2499 KS |
1114 | if (mtu_valid) |
1115 | list_move(&fcf->list, &fip->fcfs); | |
981c1154 | 1116 | |
97c8389d JE |
1117 | /* |
1118 | * If this is the first validated FCF, note the time and | |
1119 | * set a timer to trigger selection. | |
1120 | */ | |
d99ee45b | 1121 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 1122 | fip->sel_time = jiffies + |
70b51aab | 1123 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1124 | if (!timer_pending(&fip->timer) || |
1125 | time_before(fip->sel_time, fip->timer.expires)) | |
1126 | mod_timer(&fip->timer, fip->sel_time); | |
1127 | } | |
8d55e507 | 1128 | |
97c8389d | 1129 | out: |
fdb068c6 | 1130 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1131 | } |
1132 | ||
1133 | /** | |
70b51aab RL |
1134 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
1135 | * @fip: The FCoE controller which received the packet | |
1136 | * @skb: The received FIP packet | |
97c8389d JE |
1137 | */ |
1138 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1139 | { | |
70b51aab | 1140 | struct fc_lport *lport = fip->lp; |
97c8389d | 1141 | struct fip_header *fiph; |
11b56188 | 1142 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
1143 | struct fc_frame_header *fh = NULL; |
1144 | struct fip_desc *desc; | |
1145 | struct fip_encaps *els; | |
81c11dd2 | 1146 | struct fcoe_fcf *sel; |
1bd49b48 | 1147 | struct fc_stats *stats; |
97c8389d JE |
1148 | enum fip_desc_type els_dtype = 0; |
1149 | u8 els_op; | |
1150 | u8 sub; | |
1151 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
1152 | size_t els_len = 0; | |
1153 | size_t rlen; | |
1154 | size_t dlen; | |
be61331d BPG |
1155 | u32 desc_mask = 0; |
1156 | u32 desc_cnt = 0; | |
97c8389d JE |
1157 | |
1158 | fiph = (struct fip_header *)skb->data; | |
1159 | sub = fiph->fip_subcode; | |
1160 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
1161 | goto drop; | |
1162 | ||
1163 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1164 | if (rlen + sizeof(*fiph) > skb->len) | |
1165 | goto drop; | |
1166 | ||
1167 | desc = (struct fip_desc *)(fiph + 1); | |
1168 | while (rlen > 0) { | |
be61331d | 1169 | desc_cnt++; |
97c8389d JE |
1170 | dlen = desc->fip_dlen * FIP_BPW; |
1171 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1172 | goto drop; | |
0a9c5d34 BPG |
1173 | /* Drop ELS if there are duplicate critical descriptors */ |
1174 | if (desc->fip_dtype < 32) { | |
81c11dd2 BPG |
1175 | if ((desc->fip_dtype != FIP_DT_MAC) && |
1176 | (desc_mask & 1U << desc->fip_dtype)) { | |
0a9c5d34 BPG |
1177 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
1178 | "Descriptors in FIP ELS\n"); | |
1179 | goto drop; | |
1180 | } | |
be61331d | 1181 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 1182 | } |
97c8389d JE |
1183 | switch (desc->fip_dtype) { |
1184 | case FIP_DT_MAC: | |
81c11dd2 | 1185 | sel = fip->sel_fcf; |
be61331d BPG |
1186 | if (desc_cnt == 1) { |
1187 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1188 | "received out of order\n"); | |
1189 | goto drop; | |
1190 | } | |
81c11dd2 BPG |
1191 | /* |
1192 | * Some switch implementations send two MAC descriptors, | |
1193 | * with first MAC(granted_mac) being the FPMA, and the | |
1194 | * second one(fcoe_mac) is used as destination address | |
1195 | * for sending/receiving FCoE packets. FIP traffic is | |
1196 | * sent using fip_mac. For regular switches, both | |
1197 | * fip_mac and fcoe_mac would be the same. | |
1198 | */ | |
1199 | if (desc_cnt == 2) | |
1200 | memcpy(granted_mac, | |
1201 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1202 | ETH_ALEN); | |
be61331d | 1203 | |
97c8389d JE |
1204 | if (dlen != sizeof(struct fip_mac_desc)) |
1205 | goto len_err; | |
81c11dd2 BPG |
1206 | |
1207 | if ((desc_cnt == 3) && (sel)) | |
1208 | memcpy(sel->fcoe_mac, | |
1209 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1210 | ETH_ALEN); | |
97c8389d JE |
1211 | break; |
1212 | case FIP_DT_FLOGI: | |
1213 | case FIP_DT_FDISC: | |
1214 | case FIP_DT_LOGO: | |
1215 | case FIP_DT_ELP: | |
be61331d BPG |
1216 | if (desc_cnt != 1) { |
1217 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1218 | "received out of order\n"); | |
1219 | goto drop; | |
1220 | } | |
97c8389d JE |
1221 | if (fh) |
1222 | goto drop; | |
1223 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1224 | goto len_err; | |
1225 | els_len = dlen - sizeof(*els); | |
1226 | els = (struct fip_encaps *)desc; | |
1227 | fh = (struct fc_frame_header *)(els + 1); | |
1228 | els_dtype = desc->fip_dtype; | |
1229 | break; | |
1230 | default: | |
0f51c2e5 | 1231 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1232 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
1233 | /* standard says ignore unknown descriptors >= 128 */ |
1234 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1235 | goto drop; | |
be61331d BPG |
1236 | if (desc_cnt <= 2) { |
1237 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1238 | "received out of order\n"); | |
1239 | goto drop; | |
1240 | } | |
1508f3ec | 1241 | break; |
97c8389d JE |
1242 | } |
1243 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1244 | rlen -= dlen; | |
1245 | } | |
1246 | ||
1247 | if (!fh) | |
1248 | goto drop; | |
1249 | els_op = *(u8 *)(fh + 1); | |
1250 | ||
e10f8c66 | 1251 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
794d98e7 JE |
1252 | sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { |
1253 | if (els_op == ELS_LS_ACC) { | |
1254 | if (!is_valid_ether_addr(granted_mac)) { | |
1255 | LIBFCOE_FIP_DBG(fip, | |
1256 | "Invalid MAC address %pM in FIP ELS\n", | |
1257 | granted_mac); | |
1258 | goto drop; | |
1259 | } | |
1260 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
e10f8c66 | 1261 | |
794d98e7 JE |
1262 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
1263 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1264 | if (els_dtype == FIP_DT_FLOGI) | |
1265 | fcoe_ctlr_announce(fip); | |
1266 | } | |
1267 | } else if (els_dtype == FIP_DT_FLOGI && | |
1268 | !fcoe_ctlr_flogi_retry(fip)) | |
1269 | goto drop; /* retrying FLOGI so drop reject */ | |
e10f8c66 | 1270 | } |
97c8389d | 1271 | |
be61331d BPG |
1272 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1273 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1274 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1275 | "in FIP ELS\n"); | |
1276 | goto drop; | |
1277 | } | |
1278 | ||
97c8389d JE |
1279 | /* |
1280 | * Convert skb into an fc_frame containing only the ELS. | |
1281 | */ | |
1282 | skb_pull(skb, (u8 *)fh - skb->data); | |
1283 | skb_trim(skb, els_len); | |
1284 | fp = (struct fc_frame *)skb; | |
1285 | fc_frame_init(fp); | |
1286 | fr_sof(fp) = FC_SOF_I3; | |
1287 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1288 | fr_dev(fp) = lport; |
e10f8c66 | 1289 | fr_encaps(fp) = els_dtype; |
97c8389d | 1290 | |
1bd49b48 | 1291 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
97c8389d JE |
1292 | stats->RxFrames++; |
1293 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1294 | put_cpu(); |
97c8389d | 1295 | |
70b51aab | 1296 | fc_exch_recv(lport, fp); |
97c8389d JE |
1297 | return; |
1298 | ||
1299 | len_err: | |
0f51c2e5 | 1300 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1301 | desc->fip_dtype, dlen); |
97c8389d JE |
1302 | drop: |
1303 | kfree_skb(skb); | |
1304 | } | |
1305 | ||
1306 | /** | |
70b51aab RL |
1307 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1308 | * @fip: The FCoE controller that received the frame | |
1309 | * @fh: The received FIP header | |
97c8389d JE |
1310 | * |
1311 | * There may be multiple VN_Port descriptors. | |
1312 | * The overall length has already been checked. | |
1313 | */ | |
1314 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1315 | struct fip_header *fh) |
97c8389d JE |
1316 | { |
1317 | struct fip_desc *desc; | |
1318 | struct fip_mac_desc *mp; | |
1319 | struct fip_wwn_desc *wp; | |
1320 | struct fip_vn_desc *vp; | |
1321 | size_t rlen; | |
1322 | size_t dlen; | |
1323 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1324 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1325 | struct fc_lport *vn_port = NULL; |
1326 | u32 desc_mask; | |
c051ad2e BPG |
1327 | int num_vlink_desc; |
1328 | int reset_phys_port = 0; | |
1329 | struct fip_vn_desc **vlink_desc_arr = NULL; | |
97c8389d | 1330 | |
0f51c2e5 | 1331 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1332 | |
b2593cbe BPG |
1333 | if (!fcf || !lport->port_id) { |
1334 | /* | |
1335 | * We are yet to select best FCF, but we got CVL in the | |
1336 | * meantime. reset the ctlr and let it rediscover the FCF | |
1337 | */ | |
1338 | mutex_lock(&fip->ctlr_mutex); | |
1339 | fcoe_ctlr_reset(fip); | |
1340 | mutex_unlock(&fip->ctlr_mutex); | |
97c8389d | 1341 | return; |
b2593cbe | 1342 | } |
97c8389d JE |
1343 | |
1344 | /* | |
1345 | * mask of required descriptors. Validating each one clears its bit. | |
1346 | */ | |
c051ad2e | 1347 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); |
97c8389d JE |
1348 | |
1349 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1350 | desc = (struct fip_desc *)(fh + 1); | |
c051ad2e BPG |
1351 | |
1352 | /* | |
1353 | * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen' | |
1354 | * before determining max Vx_Port descriptor but a buggy FCF could have | |
1355 | * omited either or both MAC Address and Name Identifier descriptors | |
1356 | */ | |
1357 | num_vlink_desc = rlen / sizeof(*vp); | |
1358 | if (num_vlink_desc) | |
1359 | vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc, | |
1360 | GFP_ATOMIC); | |
1361 | if (!vlink_desc_arr) | |
1362 | return; | |
1363 | num_vlink_desc = 0; | |
1364 | ||
97c8389d JE |
1365 | while (rlen >= sizeof(*desc)) { |
1366 | dlen = desc->fip_dlen * FIP_BPW; | |
1367 | if (dlen > rlen) | |
c051ad2e | 1368 | goto err; |
0a9c5d34 BPG |
1369 | /* Drop CVL if there are duplicate critical descriptors */ |
1370 | if ((desc->fip_dtype < 32) && | |
c051ad2e | 1371 | (desc->fip_dtype != FIP_DT_VN_ID) && |
0a9c5d34 BPG |
1372 | !(desc_mask & 1U << desc->fip_dtype)) { |
1373 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1374 | "Descriptors in FIP CVL\n"); | |
c051ad2e | 1375 | goto err; |
0a9c5d34 | 1376 | } |
97c8389d JE |
1377 | switch (desc->fip_dtype) { |
1378 | case FIP_DT_MAC: | |
1379 | mp = (struct fip_mac_desc *)desc; | |
1380 | if (dlen < sizeof(*mp)) | |
c051ad2e | 1381 | goto err; |
6942df7f | 1382 | if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac)) |
c051ad2e | 1383 | goto err; |
97c8389d JE |
1384 | desc_mask &= ~BIT(FIP_DT_MAC); |
1385 | break; | |
1386 | case FIP_DT_NAME: | |
1387 | wp = (struct fip_wwn_desc *)desc; | |
1388 | if (dlen < sizeof(*wp)) | |
c051ad2e | 1389 | goto err; |
97c8389d | 1390 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) |
c051ad2e | 1391 | goto err; |
97c8389d JE |
1392 | desc_mask &= ~BIT(FIP_DT_NAME); |
1393 | break; | |
1394 | case FIP_DT_VN_ID: | |
1395 | vp = (struct fip_vn_desc *)desc; | |
1396 | if (dlen < sizeof(*vp)) | |
c051ad2e BPG |
1397 | goto err; |
1398 | vlink_desc_arr[num_vlink_desc++] = vp; | |
1399 | vn_port = fc_vport_id_lookup(lport, | |
1400 | ntoh24(vp->fd_fc_id)); | |
1401 | if (vn_port && (vn_port == lport)) { | |
1402 | mutex_lock(&fip->ctlr_mutex); | |
1bd49b48 | 1403 | per_cpu_ptr(lport->stats, |
c051ad2e BPG |
1404 | get_cpu())->VLinkFailureCount++; |
1405 | put_cpu(); | |
1406 | fcoe_ctlr_reset(fip); | |
1407 | mutex_unlock(&fip->ctlr_mutex); | |
5550fda7 | 1408 | } |
97c8389d JE |
1409 | break; |
1410 | default: | |
1411 | /* standard says ignore unknown descriptors >= 128 */ | |
1412 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
c051ad2e | 1413 | goto err; |
97c8389d JE |
1414 | break; |
1415 | } | |
1416 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1417 | rlen -= dlen; | |
1418 | } | |
1419 | ||
1420 | /* | |
1421 | * reset only if all required descriptors were present and valid. | |
1422 | */ | |
c051ad2e | 1423 | if (desc_mask) |
0f51c2e5 JE |
1424 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1425 | desc_mask); | |
c051ad2e BPG |
1426 | else if (!num_vlink_desc) { |
1427 | LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n"); | |
1428 | /* | |
1429 | * No Vx_Port description. Clear all NPIV ports, | |
1430 | * followed by physical port | |
1431 | */ | |
c051ad2e | 1432 | mutex_lock(&fip->ctlr_mutex); |
1bd49b48 | 1433 | per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++; |
c051ad2e BPG |
1434 | put_cpu(); |
1435 | fcoe_ctlr_reset(fip); | |
1436 | mutex_unlock(&fip->ctlr_mutex); | |
1437 | ||
14619ea6 BPG |
1438 | mutex_lock(&lport->lp_mutex); |
1439 | list_for_each_entry(vn_port, &lport->vports, list) | |
1440 | fc_lport_reset(vn_port); | |
1441 | mutex_unlock(&lport->lp_mutex); | |
1442 | ||
c051ad2e BPG |
1443 | fc_lport_reset(fip->lp); |
1444 | fcoe_ctlr_solicit(fip, NULL); | |
97c8389d | 1445 | } else { |
c051ad2e | 1446 | int i; |
dd42dac4 | 1447 | |
c051ad2e BPG |
1448 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
1449 | for (i = 0; i < num_vlink_desc; i++) { | |
1450 | vp = vlink_desc_arr[i]; | |
1451 | vn_port = fc_vport_id_lookup(lport, | |
1452 | ntoh24(vp->fd_fc_id)); | |
1453 | if (!vn_port) | |
1454 | continue; | |
1455 | ||
1456 | /* | |
1457 | * 'port_id' is already validated, check MAC address and | |
1458 | * wwpn | |
1459 | */ | |
6942df7f JP |
1460 | if (!ether_addr_equal(fip->get_src_addr(vn_port), |
1461 | vp->fd_mac) || | |
c051ad2e BPG |
1462 | get_unaligned_be64(&vp->fd_wwpn) != |
1463 | vn_port->wwpn) | |
1464 | continue; | |
1465 | ||
1466 | if (vn_port == lport) | |
1467 | /* | |
1468 | * Physical port, defer processing till all | |
1469 | * listed NPIV ports are cleared | |
1470 | */ | |
1471 | reset_phys_port = 1; | |
1472 | else /* NPIV port */ | |
1473 | fc_lport_reset(vn_port); | |
1474 | } | |
5550fda7 | 1475 | |
c051ad2e | 1476 | if (reset_phys_port) { |
5550fda7 BPG |
1477 | fc_lport_reset(fip->lp); |
1478 | fcoe_ctlr_solicit(fip, NULL); | |
1479 | } | |
97c8389d | 1480 | } |
c051ad2e BPG |
1481 | |
1482 | err: | |
1483 | kfree(vlink_desc_arr); | |
97c8389d JE |
1484 | } |
1485 | ||
1486 | /** | |
70b51aab RL |
1487 | * fcoe_ctlr_recv() - Receive a FIP packet |
1488 | * @fip: The FCoE controller that received the packet | |
1489 | * @skb: The received FIP packet | |
97c8389d | 1490 | * |
1f4aed81 | 1491 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1492 | */ |
1493 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1494 | { | |
c0866286 NH |
1495 | skb = skb_share_check(skb, GFP_ATOMIC); |
1496 | if (!skb) | |
1497 | return; | |
1f4aed81 | 1498 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1499 | schedule_work(&fip->recv_work); |
1500 | } | |
1501 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1502 | ||
1503 | /** | |
70b51aab RL |
1504 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1505 | * @fip: The FCoE controller that received the frame | |
1506 | * @skb: The received FIP frame | |
97c8389d JE |
1507 | * |
1508 | * Returns non-zero if the frame is dropped. | |
1509 | */ | |
1510 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1511 | { | |
1512 | struct fip_header *fiph; | |
1513 | struct ethhdr *eh; | |
1514 | enum fip_state state; | |
1515 | u16 op; | |
1516 | u8 sub; | |
1517 | ||
1518 | if (skb_linearize(skb)) | |
1519 | goto drop; | |
1520 | if (skb->len < sizeof(*fiph)) | |
1521 | goto drop; | |
1522 | eh = eth_hdr(skb); | |
e10f8c66 | 1523 | if (fip->mode == FIP_MODE_VN2VN) { |
6942df7f JP |
1524 | if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && |
1525 | !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) && | |
1526 | !ether_addr_equal(eh->h_dest, fcoe_all_p2p)) | |
e10f8c66 | 1527 | goto drop; |
6942df7f JP |
1528 | } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && |
1529 | !ether_addr_equal(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1530 | goto drop; |
1531 | fiph = (struct fip_header *)skb->data; | |
1532 | op = ntohs(fiph->fip_op); | |
1533 | sub = fiph->fip_subcode; | |
1534 | ||
97c8389d JE |
1535 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1536 | goto drop; | |
1537 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1538 | goto drop; | |
1539 | ||
fdb068c6 | 1540 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1541 | state = fip->state; |
1542 | if (state == FIP_ST_AUTO) { | |
1543 | fip->map_dest = 0; | |
9b651da9 | 1544 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1545 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1546 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1547 | } |
fdb068c6 | 1548 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1549 | |
1550 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1551 | return fcoe_ctlr_vn_recv(fip, skb); | |
1552 | ||
1553 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && | |
1554 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1555 | goto drop; |
1556 | ||
1557 | if (op == FIP_OP_LS) { | |
1558 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1559 | return 0; | |
1560 | } | |
e10f8c66 JE |
1561 | |
1562 | if (state != FIP_ST_ENABLED) | |
1563 | goto drop; | |
1564 | ||
97c8389d JE |
1565 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1566 | fcoe_ctlr_recv_adv(fip, skb); | |
1567 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1568 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1569 | kfree_skb(skb); | |
1570 | return 0; | |
1571 | drop: | |
1572 | kfree_skb(skb); | |
1573 | return -1; | |
1574 | } | |
1575 | ||
1576 | /** | |
70b51aab RL |
1577 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1578 | * @fip: The FCoE controller | |
97c8389d | 1579 | * |
ba9cd5d0 JE |
1580 | * Returns the selected FCF, or NULL if none are usable. |
1581 | * | |
97c8389d JE |
1582 | * If there are conflicting advertisements, no FCF can be chosen. |
1583 | * | |
794d98e7 JE |
1584 | * If there is already a selected FCF, this will choose a better one or |
1585 | * an equivalent one that hasn't already been sent a FLOGI. | |
1586 | * | |
97c8389d JE |
1587 | * Called with lock held. |
1588 | */ | |
ba9cd5d0 | 1589 | static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) |
97c8389d JE |
1590 | { |
1591 | struct fcoe_fcf *fcf; | |
794d98e7 | 1592 | struct fcoe_fcf *best = fip->sel_fcf; |
97c8389d JE |
1593 | |
1594 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9069f5c4 JE |
1595 | LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " |
1596 | "VFID %d mac %pM map %x val %d " | |
1597 | "sent %u pri %u\n", | |
1598 | fcf->fabric_name, fcf->vfid, fcf->fcf_mac, | |
1599 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), | |
1600 | fcf->flogi_sent, fcf->pri); | |
97c8389d | 1601 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1602 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1603 | "map %x %svalid %savailable\n", | |
1604 | fcf->fabric_name, fcf->fc_map, | |
1605 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1606 | (fcf->flags & FIP_FL_AVAIL) ? | |
1607 | "" : "un"); | |
97c8389d JE |
1608 | continue; |
1609 | } | |
e6c10b7c KM |
1610 | if (!best || fcf->pri < best->pri || best->flogi_sent) |
1611 | best = fcf; | |
1612 | if (fcf->fabric_name != best->fabric_name || | |
1613 | fcf->vfid != best->vfid || | |
1614 | fcf->fc_map != best->fc_map) { | |
1f953b0d BPG |
1615 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " |
1616 | "or FC-MAP\n"); | |
1617 | return NULL; | |
1618 | } | |
97c8389d JE |
1619 | } |
1620 | fip->sel_fcf = best; | |
c47036a7 | 1621 | if (best) { |
9069f5c4 | 1622 | LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); |
c47036a7 JE |
1623 | fip->port_ka_time = jiffies + |
1624 | msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
1625 | fip->ctlr_ka_time = jiffies + best->fka_period; | |
1626 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1627 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
1628 | } | |
ba9cd5d0 | 1629 | return best; |
97c8389d JE |
1630 | } |
1631 | ||
794d98e7 JE |
1632 | /** |
1633 | * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF | |
1634 | * @fip: The FCoE controller | |
1635 | * | |
1636 | * Returns non-zero error if it could not be sent. | |
1637 | * | |
1638 | * Called with ctlr_mutex and ctlr_lock held. | |
1639 | * Caller must verify that fip->sel_fcf is not NULL. | |
1640 | */ | |
1641 | static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) | |
1642 | { | |
1643 | struct sk_buff *skb; | |
1644 | struct sk_buff *skb_orig; | |
1645 | struct fc_frame_header *fh; | |
1646 | int error; | |
1647 | ||
1648 | skb_orig = fip->flogi_req; | |
1649 | if (!skb_orig) | |
1650 | return -EINVAL; | |
1651 | ||
1652 | /* | |
1653 | * Clone and send the FLOGI request. If clone fails, use original. | |
1654 | */ | |
1655 | skb = skb_clone(skb_orig, GFP_ATOMIC); | |
1656 | if (!skb) { | |
1657 | skb = skb_orig; | |
1658 | fip->flogi_req = NULL; | |
1659 | } | |
1660 | fh = (struct fc_frame_header *)skb->data; | |
1661 | error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, | |
1662 | ntoh24(fh->fh_d_id)); | |
1663 | if (error) { | |
1664 | kfree_skb(skb); | |
1665 | return error; | |
1666 | } | |
1667 | fip->send(fip, skb); | |
1668 | fip->sel_fcf->flogi_sent = 1; | |
1669 | return 0; | |
1670 | } | |
1671 | ||
1672 | /** | |
1673 | * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible | |
1674 | * @fip: The FCoE controller | |
1675 | * | |
1676 | * Returns non-zero error code if there's no FLOGI request to retry or | |
1677 | * no alternate FCF available. | |
1678 | */ | |
1679 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) | |
1680 | { | |
1681 | struct fcoe_fcf *fcf; | |
1682 | int error; | |
1683 | ||
1684 | mutex_lock(&fip->ctlr_mutex); | |
1685 | spin_lock_bh(&fip->ctlr_lock); | |
1686 | LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1687 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1688 | if (!fcf || fcf->flogi_sent) { |
1689 | kfree_skb(fip->flogi_req); | |
1690 | fip->flogi_req = NULL; | |
1691 | error = -ENOENT; | |
1692 | } else { | |
1693 | fcoe_ctlr_solicit(fip, NULL); | |
1694 | error = fcoe_ctlr_flogi_send_locked(fip); | |
1695 | } | |
1696 | spin_unlock_bh(&fip->ctlr_lock); | |
1697 | mutex_unlock(&fip->ctlr_mutex); | |
1698 | return error; | |
1699 | } | |
1700 | ||
1701 | ||
1702 | /** | |
1703 | * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. | |
1704 | * @fip: The FCoE controller that timed out | |
1705 | * | |
1706 | * Done here because fcoe_ctlr_els_send() can't get mutex. | |
1707 | * | |
1708 | * Called with ctlr_mutex held. The caller must not hold ctlr_lock. | |
1709 | */ | |
1710 | static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) | |
1711 | { | |
1712 | struct fcoe_fcf *fcf; | |
1713 | ||
1714 | spin_lock_bh(&fip->ctlr_lock); | |
1715 | fcf = fip->sel_fcf; | |
1716 | if (!fcf || !fip->flogi_req_send) | |
1717 | goto unlock; | |
1718 | ||
1719 | LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); | |
1720 | ||
1721 | /* | |
1722 | * If this FLOGI is being sent due to a timeout retry | |
1723 | * to the same FCF as before, select a different FCF if possible. | |
1724 | */ | |
1725 | if (fcf->flogi_sent) { | |
1726 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1727 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1728 | if (!fcf || fcf->flogi_sent) { |
1729 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); | |
1730 | list_for_each_entry(fcf, &fip->fcfs, list) | |
1731 | fcf->flogi_sent = 0; | |
ba9cd5d0 | 1732 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1733 | } |
1734 | } | |
1735 | if (fcf) { | |
1736 | fcoe_ctlr_flogi_send_locked(fip); | |
1737 | fip->flogi_req_send = 0; | |
1738 | } else /* XXX */ | |
1739 | LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); | |
1740 | unlock: | |
1741 | spin_unlock_bh(&fip->ctlr_lock); | |
1742 | } | |
1743 | ||
97c8389d | 1744 | /** |
70b51aab RL |
1745 | * fcoe_ctlr_timeout() - FIP timeout handler |
1746 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1747 | */ |
1748 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1749 | { | |
1750 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1751 | |
1752 | schedule_work(&fip->timer_work); | |
1753 | } | |
1754 | ||
1755 | /** | |
1756 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1757 | * @work: Handle to a FCoE controller | |
1758 | * | |
1759 | * Ages FCFs. Triggers FCF selection if possible. | |
1760 | * Sends keep-alives and resets. | |
1761 | */ | |
1762 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1763 | { | |
1764 | struct fcoe_ctlr *fip; | |
1765 | struct fc_lport *vport; | |
1766 | u8 *mac; | |
1767 | u8 reset = 0; | |
1768 | u8 send_ctlr_ka = 0; | |
1769 | u8 send_port_ka = 0; | |
97c8389d JE |
1770 | struct fcoe_fcf *sel; |
1771 | struct fcoe_fcf *fcf; | |
8690cb83 | 1772 | unsigned long next_timer; |
97c8389d | 1773 | |
fdb068c6 | 1774 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1775 | if (fip->mode == FIP_MODE_VN2VN) |
1776 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1777 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1778 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1779 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1780 | return; |
1781 | } | |
1782 | ||
1783 | fcf = fip->sel_fcf; | |
8690cb83 | 1784 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1785 | |
1786 | sel = fip->sel_fcf; | |
8690cb83 JE |
1787 | if (!sel && fip->sel_time) { |
1788 | if (time_after_eq(jiffies, fip->sel_time)) { | |
ba9cd5d0 | 1789 | sel = fcoe_ctlr_select(fip); |
8690cb83 JE |
1790 | fip->sel_time = 0; |
1791 | } else if (time_after(next_timer, fip->sel_time)) | |
1792 | next_timer = fip->sel_time; | |
97c8389d JE |
1793 | } |
1794 | ||
794d98e7 JE |
1795 | if (sel && fip->flogi_req_send) |
1796 | fcoe_ctlr_flogi_send(fip); | |
1797 | else if (!sel && fcf) | |
1798 | reset = 1; | |
97c8389d | 1799 | |
8cdffdcc | 1800 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1801 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1802 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1803 | send_ctlr_ka = 1; |
97c8389d JE |
1804 | } |
1805 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1806 | next_timer = fip->ctlr_ka_time; | |
1807 | ||
1808 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1809 | fip->port_ka_time = jiffies + |
70b51aab | 1810 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1811 | send_port_ka = 1; |
97c8389d JE |
1812 | } |
1813 | if (time_after(next_timer, fip->port_ka_time)) | |
1814 | next_timer = fip->port_ka_time; | |
97c8389d | 1815 | } |
8690cb83 JE |
1816 | if (!list_empty(&fip->fcfs)) |
1817 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1818 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1819 | |
516a6486 | 1820 | if (reset) { |
dd42dac4 | 1821 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1822 | /* restart things with a solicitation */ |
1823 | fcoe_ctlr_solicit(fip, NULL); | |
1824 | } | |
11b56188 | 1825 | |
fdb068c6 | 1826 | if (send_ctlr_ka) |
11b56188 | 1827 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1828 | |
1829 | if (send_port_ka) { | |
11b56188 CL |
1830 | mutex_lock(&fip->lp->lp_mutex); |
1831 | mac = fip->get_src_addr(fip->lp); | |
1832 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1833 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1834 | mac = fip->get_src_addr(vport); | |
1835 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1836 | } | |
1837 | mutex_unlock(&fip->lp->lp_mutex); | |
1838 | } | |
97c8389d JE |
1839 | } |
1840 | ||
1841 | /** | |
70b51aab RL |
1842 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1843 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1844 | */ |
1845 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1846 | { | |
1847 | struct fcoe_ctlr *fip; | |
1848 | struct sk_buff *skb; | |
1849 | ||
1850 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1851 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1852 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1853 | } |
1854 | ||
1855 | /** | |
386309ce | 1856 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1857 | * @fip: The FCoE controller |
1858 | * @fp: The FC frame to snoop | |
97c8389d JE |
1859 | * |
1860 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1861 | * | |
1862 | * The caller has checked that we are waiting for login as indicated | |
1863 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1864 | * | |
1865 | * The caller is responsible for freeing the frame. | |
386309ce | 1866 | * Fill in the granted_mac address. |
97c8389d JE |
1867 | * |
1868 | * Return non-zero if the frame should not be delivered to libfc. | |
1869 | */ | |
11b56188 | 1870 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1871 | struct fc_frame *fp) |
97c8389d JE |
1872 | { |
1873 | struct fc_frame_header *fh; | |
1874 | u8 op; | |
386309ce | 1875 | u8 *sa; |
97c8389d | 1876 | |
386309ce | 1877 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1878 | fh = fc_frame_header_get(fp); |
1879 | if (fh->fh_type != FC_TYPE_ELS) | |
1880 | return 0; | |
1881 | ||
1882 | op = fc_frame_payload_op(fp); | |
1883 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1884 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1885 | ||
fdb068c6 | 1886 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1887 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1888 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1889 | return -EINVAL; |
1890 | } | |
9b651da9 | 1891 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1892 | LIBFCOE_FIP_DBG(fip, |
1893 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1894 | |
1895 | /* | |
1896 | * FLOGI accepted. | |
1897 | * If the src mac addr is FC_OUI-based, then we mark the | |
1898 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1899 | * Otherwise we use the FCoE gateway addr | |
1900 | */ | |
6942df7f | 1901 | if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { |
cd229e42 | 1902 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
1903 | } else { |
1904 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1905 | fip->map_dest = 0; | |
1906 | } | |
1907 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1908 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1909 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1910 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1911 | /* | |
1912 | * Save source MAC for point-to-point responses. | |
1913 | */ | |
fdb068c6 | 1914 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1915 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1916 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1917 | fip->map_dest = 0; | |
e49bf614 JE |
1918 | if (fip->state == FIP_ST_AUTO) |
1919 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1920 | "Setting non-FIP mode\n"); | |
9b651da9 | 1921 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1922 | } |
fdb068c6 | 1923 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1924 | } |
1925 | return 0; | |
1926 | } | |
1927 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1928 | ||
5e80f7f7 | 1929 | /** |
70b51aab RL |
1930 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1931 | * @mac: The MAC address to convert | |
1932 | * @scheme: The scheme to use when converting | |
1933 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1934 | * |
1935 | * Returns: u64 fc world wide name | |
1936 | */ | |
1937 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1938 | unsigned int scheme, unsigned int port) | |
1939 | { | |
1940 | u64 wwn; | |
1941 | u64 host_mac; | |
1942 | ||
1943 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1944 | host_mac = ((u64) mac[0] << 40) | | |
1945 | ((u64) mac[1] << 32) | | |
1946 | ((u64) mac[2] << 24) | | |
1947 | ((u64) mac[3] << 16) | | |
1948 | ((u64) mac[4] << 8) | | |
1949 | (u64) mac[5]; | |
1950 | ||
1951 | WARN_ON(host_mac >= (1ULL << 48)); | |
1952 | wwn = host_mac | ((u64) scheme << 60); | |
1953 | switch (scheme) { | |
1954 | case 1: | |
1955 | WARN_ON(port != 0); | |
1956 | break; | |
1957 | case 2: | |
1958 | WARN_ON(port >= 0xfff); | |
1959 | wwn |= (u64) port << 48; | |
1960 | break; | |
1961 | default: | |
1962 | WARN_ON(1); | |
1963 | break; | |
1964 | } | |
1965 | ||
1966 | return wwn; | |
1967 | } | |
1968 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1969 | ||
e10f8c66 JE |
1970 | /** |
1971 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
1972 | * @rdata: libfc remote port | |
1973 | */ | |
1974 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
1975 | { | |
1976 | return (struct fcoe_rport *)(rdata + 1); | |
1977 | } | |
1978 | ||
1979 | /** | |
1980 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
1981 | * @fip: The FCoE controller | |
1982 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
1983 | * @dest: The destination Ethernet MAC address | |
1984 | * @min_len: minimum size of the Ethernet payload to be sent | |
1985 | */ | |
1986 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
1987 | enum fip_vn2vn_subcode sub, | |
1988 | const u8 *dest, size_t min_len) | |
1989 | { | |
1990 | struct sk_buff *skb; | |
1991 | struct fip_frame { | |
1992 | struct ethhdr eth; | |
1993 | struct fip_header fip; | |
1994 | struct fip_mac_desc mac; | |
1995 | struct fip_wwn_desc wwnn; | |
1996 | struct fip_vn_desc vn; | |
0095a921 | 1997 | } __packed * frame; |
e10f8c66 JE |
1998 | struct fip_fc4_feat *ff; |
1999 | struct fip_size_desc *size; | |
2000 | u32 fcp_feat; | |
2001 | size_t len; | |
2002 | size_t dlen; | |
2003 | ||
2004 | len = sizeof(*frame); | |
2005 | dlen = 0; | |
2006 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
2007 | dlen = sizeof(struct fip_fc4_feat) + | |
2008 | sizeof(struct fip_size_desc); | |
2009 | len += dlen; | |
2010 | } | |
2011 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
2012 | len = max(len, min_len + sizeof(struct ethhdr)); | |
2013 | ||
2014 | skb = dev_alloc_skb(len); | |
2015 | if (!skb) | |
2016 | return; | |
2017 | ||
2018 | frame = (struct fip_frame *)skb->data; | |
2019 | memset(frame, 0, len); | |
2020 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
d227f029 YZ |
2021 | |
2022 | if (sub == FIP_SC_VN_BEACON) { | |
2023 | hton24(frame->eth.h_source, FIP_VN_FC_MAP); | |
2024 | hton24(frame->eth.h_source + 3, fip->port_id); | |
2025 | } else { | |
2026 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
2027 | } | |
e10f8c66 JE |
2028 | frame->eth.h_proto = htons(ETH_P_FIP); |
2029 | ||
2030 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
2031 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
2032 | frame->fip.fip_subcode = sub; | |
2033 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
2034 | ||
2035 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
2036 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
2037 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
2038 | ||
2039 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
2040 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
2041 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
2042 | ||
2043 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
2044 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
2045 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
2046 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
2047 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
2048 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
2049 | ||
2050 | /* | |
2051 | * For claims, add FC-4 features. | |
2052 | * TBD: Add interface to get fc-4 types and features from libfc. | |
2053 | */ | |
2054 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
2055 | ff = (struct fip_fc4_feat *)(frame + 1); | |
2056 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
2057 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
2058 | ff->fd_fts = fip->lp->fcts; | |
2059 | ||
2060 | fcp_feat = 0; | |
2061 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
2062 | fcp_feat |= FCP_FEAT_INIT; | |
2063 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
2064 | fcp_feat |= FCP_FEAT_TARG; | |
2065 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
2066 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
2067 | ||
2068 | size = (struct fip_size_desc *)(ff + 1); | |
2069 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
2070 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
2071 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
2072 | } | |
2073 | ||
2074 | skb_put(skb, len); | |
2075 | skb->protocol = htons(ETH_P_FIP); | |
6f6c2aa3 | 2076 | skb->priority = fip->priority; |
e10f8c66 JE |
2077 | skb_reset_mac_header(skb); |
2078 | skb_reset_network_header(skb); | |
2079 | ||
2080 | fip->send(fip, skb); | |
2081 | } | |
2082 | ||
2083 | /** | |
2084 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
2085 | * @lport: The lport which is receiving the event | |
2086 | * @rdata: remote port private data | |
25985edc | 2087 | * @event: The event that occurred |
e10f8c66 JE |
2088 | * |
2089 | * Locking Note: The rport lock must not be held when calling this function. | |
2090 | */ | |
2091 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
2092 | struct fc_rport_priv *rdata, | |
2093 | enum fc_rport_event event) | |
2094 | { | |
2095 | struct fcoe_ctlr *fip = lport->disc.priv; | |
2096 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2097 | ||
2098 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
2099 | rdata->ids.port_id, event); | |
2100 | ||
2101 | mutex_lock(&fip->ctlr_mutex); | |
2102 | switch (event) { | |
2103 | case RPORT_EV_READY: | |
2104 | frport->login_count = 0; | |
2105 | break; | |
2106 | case RPORT_EV_LOGO: | |
2107 | case RPORT_EV_FAILED: | |
2108 | case RPORT_EV_STOP: | |
2109 | frport->login_count++; | |
2110 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
2111 | LIBFCOE_FIP_DBG(fip, | |
2112 | "rport FLOGI limited port_id %6.6x\n", | |
2113 | rdata->ids.port_id); | |
2114 | lport->tt.rport_logoff(rdata); | |
2115 | } | |
2116 | break; | |
2117 | default: | |
2118 | break; | |
2119 | } | |
2120 | mutex_unlock(&fip->ctlr_mutex); | |
2121 | } | |
2122 | ||
2123 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
2124 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
2125 | }; | |
2126 | ||
2127 | /** | |
2128 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
2129 | * @fip: The FCoE controller | |
2130 | * | |
2131 | * Called with ctlr_mutex held. | |
2132 | */ | |
2133 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
2134 | { | |
d17efa00 MR |
2135 | struct fc_rport_priv *rdata; |
2136 | ||
e10f8c66 | 2137 | mutex_lock(&lport->disc.disc_mutex); |
d17efa00 MR |
2138 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) |
2139 | lport->tt.rport_logoff(rdata); | |
e10f8c66 JE |
2140 | lport->disc.disc_callback = NULL; |
2141 | mutex_unlock(&lport->disc.disc_mutex); | |
2142 | } | |
2143 | ||
2144 | /** | |
2145 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
2146 | * @fip: The FCoE controller | |
2147 | * | |
2148 | * Called through the local port template for discovery. | |
2149 | * Called without the ctlr_mutex held. | |
2150 | */ | |
2151 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
2152 | { | |
2153 | struct fcoe_ctlr *fip = lport->disc.priv; | |
2154 | ||
2155 | mutex_lock(&fip->ctlr_mutex); | |
2156 | fcoe_ctlr_disc_stop_locked(lport); | |
2157 | mutex_unlock(&fip->ctlr_mutex); | |
2158 | } | |
2159 | ||
2160 | /** | |
2161 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
2162 | * @fip: The FCoE controller | |
2163 | * | |
2164 | * Called through the local port template for discovery. | |
2165 | * Called without the ctlr_mutex held. | |
2166 | */ | |
2167 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
2168 | { | |
2169 | fcoe_ctlr_disc_stop(lport); | |
2170 | lport->tt.rport_flush_queue(); | |
2171 | synchronize_rcu(); | |
2172 | } | |
2173 | ||
2174 | /** | |
2175 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
2176 | * @fip: The FCoE controller | |
2177 | * | |
2178 | * Called with fcoe_ctlr lock held. | |
2179 | */ | |
2180 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
2181 | { | |
2182 | unsigned long wait; | |
2183 | u32 port_id; | |
2184 | ||
2185 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
2186 | ||
2187 | /* | |
2188 | * Get proposed port ID. | |
2189 | * If this is the first try after link up, use any previous port_id. | |
2190 | * If there was none, use the low bits of the port_name. | |
2191 | * On subsequent tries, get the next random one. | |
2192 | * Don't use reserved IDs, use another non-zero value, just as random. | |
2193 | */ | |
2194 | port_id = fip->port_id; | |
2195 | if (fip->probe_tries) | |
496f2f93 | 2196 | port_id = prandom_u32_state(&fip->rnd_state) & 0xffff; |
e10f8c66 JE |
2197 | else if (!port_id) |
2198 | port_id = fip->lp->wwpn & 0xffff; | |
2199 | if (!port_id || port_id == 0xffff) | |
2200 | port_id = 1; | |
2201 | fip->port_id = port_id; | |
2202 | ||
2203 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
2204 | fip->probe_tries++; | |
3b60a64f | 2205 | wait = prandom_u32() % FIP_VN_PROBE_WAIT; |
e10f8c66 JE |
2206 | } else |
2207 | wait = FIP_VN_RLIM_INT; | |
2208 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
2209 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
2210 | } | |
2211 | ||
2212 | /** | |
2213 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
2214 | * @fip: The FCoE controller | |
2215 | * | |
2216 | * Called with fcoe_ctlr lock held. | |
2217 | */ | |
2218 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
2219 | { | |
2220 | fip->probe_tries = 0; | |
496f2f93 | 2221 | prandom_seed_state(&fip->rnd_state, fip->lp->wwpn); |
e10f8c66 JE |
2222 | fcoe_ctlr_vn_restart(fip); |
2223 | } | |
2224 | ||
2225 | /** | |
2226 | * fcoe_ctlr_vn_parse - parse probe request or response | |
2227 | * @fip: The FCoE controller | |
2228 | * @skb: incoming packet | |
2229 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
2230 | * | |
2231 | * Returns non-zero error number on error. | |
2232 | * Does not consume the packet. | |
2233 | */ | |
2234 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
2235 | struct sk_buff *skb, | |
2236 | struct fc_rport_priv *rdata) | |
2237 | { | |
2238 | struct fip_header *fiph; | |
2239 | struct fip_desc *desc = NULL; | |
2240 | struct fip_mac_desc *macd = NULL; | |
2241 | struct fip_wwn_desc *wwn = NULL; | |
2242 | struct fip_vn_desc *vn = NULL; | |
2243 | struct fip_size_desc *size = NULL; | |
2244 | struct fcoe_rport *frport; | |
2245 | size_t rlen; | |
2246 | size_t dlen; | |
2247 | u32 desc_mask = 0; | |
2248 | u32 dtype; | |
2249 | u8 sub; | |
2250 | ||
2251 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2252 | frport = fcoe_ctlr_rport(rdata); | |
2253 | ||
2254 | fiph = (struct fip_header *)skb->data; | |
2255 | frport->flags = ntohs(fiph->fip_flags); | |
2256 | ||
2257 | sub = fiph->fip_subcode; | |
2258 | switch (sub) { | |
2259 | case FIP_SC_VN_PROBE_REQ: | |
2260 | case FIP_SC_VN_PROBE_REP: | |
2261 | case FIP_SC_VN_BEACON: | |
2262 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2263 | BIT(FIP_DT_VN_ID); | |
2264 | break; | |
2265 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2266 | case FIP_SC_VN_CLAIM_REP: | |
2267 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2268 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
2269 | BIT(FIP_DT_FCOE_SIZE); | |
2270 | break; | |
2271 | default: | |
2272 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2273 | return -EINVAL; | |
2274 | } | |
2275 | ||
2276 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2277 | if (rlen + sizeof(*fiph) > skb->len) | |
2278 | return -EINVAL; | |
2279 | ||
2280 | desc = (struct fip_desc *)(fiph + 1); | |
2281 | while (rlen > 0) { | |
2282 | dlen = desc->fip_dlen * FIP_BPW; | |
2283 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2284 | return -EINVAL; | |
2285 | ||
2286 | dtype = desc->fip_dtype; | |
2287 | if (dtype < 32) { | |
2288 | if (!(desc_mask & BIT(dtype))) { | |
2289 | LIBFCOE_FIP_DBG(fip, | |
2290 | "unexpected or duplicated desc " | |
2291 | "desc type %u in " | |
2292 | "FIP VN2VN subtype %u\n", | |
2293 | dtype, sub); | |
2294 | return -EINVAL; | |
2295 | } | |
2296 | desc_mask &= ~BIT(dtype); | |
2297 | } | |
2298 | ||
2299 | switch (dtype) { | |
2300 | case FIP_DT_MAC: | |
2301 | if (dlen != sizeof(struct fip_mac_desc)) | |
2302 | goto len_err; | |
2303 | macd = (struct fip_mac_desc *)desc; | |
2304 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2305 | LIBFCOE_FIP_DBG(fip, | |
2306 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2307 | macd->fd_mac); | |
2308 | return -EINVAL; | |
2309 | } | |
2310 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2311 | break; | |
2312 | case FIP_DT_NAME: | |
2313 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2314 | goto len_err; | |
2315 | wwn = (struct fip_wwn_desc *)desc; | |
2316 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2317 | break; | |
2318 | case FIP_DT_VN_ID: | |
2319 | if (dlen != sizeof(struct fip_vn_desc)) | |
2320 | goto len_err; | |
2321 | vn = (struct fip_vn_desc *)desc; | |
2322 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
2323 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
2324 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
2325 | break; | |
2326 | case FIP_DT_FC4F: | |
2327 | if (dlen != sizeof(struct fip_fc4_feat)) | |
2328 | goto len_err; | |
2329 | break; | |
2330 | case FIP_DT_FCOE_SIZE: | |
2331 | if (dlen != sizeof(struct fip_size_desc)) | |
2332 | goto len_err; | |
2333 | size = (struct fip_size_desc *)desc; | |
2334 | frport->fcoe_len = ntohs(size->fd_size); | |
2335 | break; | |
2336 | default: | |
2337 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2338 | "in FIP probe\n", dtype); | |
2339 | /* standard says ignore unknown descriptors >= 128 */ | |
2340 | if (dtype < FIP_DT_VENDOR_BASE) | |
2341 | return -EINVAL; | |
2342 | break; | |
2343 | } | |
2344 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2345 | rlen -= dlen; | |
2346 | } | |
2347 | return 0; | |
2348 | ||
2349 | len_err: | |
2350 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2351 | dtype, dlen); | |
2352 | return -EINVAL; | |
2353 | } | |
2354 | ||
2355 | /** | |
2356 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
2357 | * @fip: The FCoE controller | |
2358 | * | |
2359 | * Called with ctlr_mutex held. | |
2360 | */ | |
2361 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
2362 | { | |
2363 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
2364 | fip->sol_time = jiffies; | |
2365 | } | |
2366 | ||
2367 | /** | |
2368 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
2369 | * @fip: The FCoE controller | |
2370 | * @rdata: parsed remote port with frport from the probe request | |
2371 | * | |
2372 | * Called with ctlr_mutex held. | |
2373 | */ | |
2374 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
2375 | struct fc_rport_priv *rdata) | |
2376 | { | |
2377 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2378 | ||
2379 | if (rdata->ids.port_id != fip->port_id) | |
2380 | return; | |
2381 | ||
2382 | switch (fip->state) { | |
2383 | case FIP_ST_VNMP_CLAIM: | |
2384 | case FIP_ST_VNMP_UP: | |
2385 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2386 | frport->enode_mac, 0); | |
2387 | break; | |
2388 | case FIP_ST_VNMP_PROBE1: | |
2389 | case FIP_ST_VNMP_PROBE2: | |
2390 | /* | |
2391 | * Decide whether to reply to the Probe. | |
2392 | * Our selected address is never a "recorded" one, so | |
2393 | * only reply if our WWPN is greater and the | |
2394 | * Probe's REC bit is not set. | |
2395 | * If we don't reply, we will change our address. | |
2396 | */ | |
2397 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2398 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
2399 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2400 | frport->enode_mac, 0); | |
2401 | break; | |
2402 | } | |
2403 | /* fall through */ | |
2404 | case FIP_ST_VNMP_START: | |
2405 | fcoe_ctlr_vn_restart(fip); | |
2406 | break; | |
2407 | default: | |
2408 | break; | |
2409 | } | |
2410 | } | |
2411 | ||
2412 | /** | |
2413 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2414 | * @fip: The FCoE controller | |
2415 | * @rdata: parsed remote port with frport from the probe request | |
2416 | * | |
2417 | * Called with ctlr_mutex held. | |
2418 | */ | |
2419 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2420 | struct fc_rport_priv *rdata) | |
2421 | { | |
2422 | if (rdata->ids.port_id != fip->port_id) | |
2423 | return; | |
2424 | switch (fip->state) { | |
2425 | case FIP_ST_VNMP_START: | |
2426 | case FIP_ST_VNMP_PROBE1: | |
2427 | case FIP_ST_VNMP_PROBE2: | |
2428 | case FIP_ST_VNMP_CLAIM: | |
2429 | fcoe_ctlr_vn_restart(fip); | |
2430 | break; | |
2431 | case FIP_ST_VNMP_UP: | |
2432 | fcoe_ctlr_vn_send_claim(fip); | |
2433 | break; | |
2434 | default: | |
2435 | break; | |
2436 | } | |
2437 | } | |
2438 | ||
2439 | /** | |
2440 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2441 | * @fip: The FCoE controller | |
2442 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2443 | * | |
2444 | * Called with ctlr_mutex held. | |
2445 | */ | |
2446 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2447 | { | |
2448 | struct fc_lport *lport = fip->lp; | |
2449 | struct fc_rport_priv *rdata; | |
2450 | struct fc_rport_identifiers *ids; | |
2451 | struct fcoe_rport *frport; | |
2452 | u32 port_id; | |
2453 | ||
2454 | port_id = new->ids.port_id; | |
2455 | if (port_id == fip->port_id) | |
2456 | return; | |
2457 | ||
2458 | mutex_lock(&lport->disc.disc_mutex); | |
2459 | rdata = lport->tt.rport_create(lport, port_id); | |
2460 | if (!rdata) { | |
2461 | mutex_unlock(&lport->disc.disc_mutex); | |
2462 | return; | |
2463 | } | |
2464 | ||
2465 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2466 | rdata->disc_id = lport->disc.disc_id; | |
2467 | ||
2468 | ids = &rdata->ids; | |
2469 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
2470 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) | |
2471 | lport->tt.rport_logoff(rdata); | |
2472 | ids->port_name = new->ids.port_name; | |
2473 | ids->node_name = new->ids.node_name; | |
2474 | mutex_unlock(&lport->disc.disc_mutex); | |
2475 | ||
2476 | frport = fcoe_ctlr_rport(rdata); | |
2477 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", | |
2478 | port_id, frport->fcoe_len ? "old" : "new"); | |
2479 | *frport = *fcoe_ctlr_rport(new); | |
2480 | frport->time = 0; | |
2481 | } | |
2482 | ||
2483 | /** | |
2484 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2485 | * @fip: The FCoE controller | |
2486 | * @port_id: The port_id of the remote VN_node | |
2487 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2488 | * | |
2489 | * Returns non-zero error if no remote port found. | |
2490 | */ | |
2491 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2492 | { | |
2493 | struct fc_lport *lport = fip->lp; | |
2494 | struct fc_rport_priv *rdata; | |
2495 | struct fcoe_rport *frport; | |
2496 | int ret = -1; | |
2497 | ||
2498 | rcu_read_lock(); | |
2499 | rdata = lport->tt.rport_lookup(lport, port_id); | |
2500 | if (rdata) { | |
2501 | frport = fcoe_ctlr_rport(rdata); | |
2502 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2503 | ret = 0; | |
2504 | } | |
2505 | rcu_read_unlock(); | |
2506 | return ret; | |
2507 | } | |
2508 | ||
2509 | /** | |
2510 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2511 | * @fip: The FCoE controller | |
2512 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2513 | * | |
2514 | * Called with ctlr_mutex held. | |
2515 | */ | |
2516 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2517 | struct fc_rport_priv *new) | |
2518 | { | |
2519 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2520 | ||
2521 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2522 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2523 | return; | |
2524 | } | |
2525 | switch (fip->state) { | |
2526 | case FIP_ST_VNMP_START: | |
2527 | case FIP_ST_VNMP_PROBE1: | |
2528 | case FIP_ST_VNMP_PROBE2: | |
2529 | if (new->ids.port_id == fip->port_id) | |
2530 | fcoe_ctlr_vn_restart(fip); | |
2531 | break; | |
2532 | case FIP_ST_VNMP_CLAIM: | |
2533 | case FIP_ST_VNMP_UP: | |
2534 | if (new->ids.port_id == fip->port_id) { | |
2535 | if (new->ids.port_name > fip->lp->wwpn) { | |
2536 | fcoe_ctlr_vn_restart(fip); | |
2537 | break; | |
2538 | } | |
2539 | fcoe_ctlr_vn_send_claim(fip); | |
2540 | break; | |
2541 | } | |
2542 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, | |
2543 | min((u32)frport->fcoe_len, | |
2544 | fcoe_ctlr_fcoe_size(fip))); | |
2545 | fcoe_ctlr_vn_add(fip, new); | |
2546 | break; | |
2547 | default: | |
2548 | break; | |
2549 | } | |
2550 | } | |
2551 | ||
2552 | /** | |
2553 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2554 | * @fip: The FCoE controller that received the frame | |
2555 | * @new: newly-parsed remote port with frport from the Claim Response | |
2556 | * | |
2557 | * Called with ctlr_mutex held. | |
2558 | */ | |
2559 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2560 | struct fc_rport_priv *new) | |
2561 | { | |
2562 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2563 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2564 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2565 | fcoe_ctlr_vn_add(fip, new); | |
2566 | } | |
2567 | ||
2568 | /** | |
2569 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2570 | * @fip: The FCoE controller that received the frame | |
2571 | * @new: newly-parsed remote port with frport from the Beacon | |
2572 | * | |
2573 | * Called with ctlr_mutex held. | |
2574 | */ | |
2575 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2576 | struct fc_rport_priv *new) | |
2577 | { | |
2578 | struct fc_lport *lport = fip->lp; | |
2579 | struct fc_rport_priv *rdata; | |
2580 | struct fcoe_rport *frport; | |
2581 | ||
2582 | frport = fcoe_ctlr_rport(new); | |
2583 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2584 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2585 | return; | |
2586 | } | |
2587 | mutex_lock(&lport->disc.disc_mutex); | |
2588 | rdata = lport->tt.rport_lookup(lport, new->ids.port_id); | |
2589 | if (rdata) | |
2590 | kref_get(&rdata->kref); | |
2591 | mutex_unlock(&lport->disc.disc_mutex); | |
2592 | if (rdata) { | |
2593 | if (rdata->ids.node_name == new->ids.node_name && | |
2594 | rdata->ids.port_name == new->ids.port_name) { | |
2595 | frport = fcoe_ctlr_rport(rdata); | |
2596 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) | |
2597 | lport->tt.rport_login(rdata); | |
2598 | frport->time = jiffies; | |
2599 | } | |
2600 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
2601 | return; | |
2602 | } | |
2603 | if (fip->state != FIP_ST_VNMP_UP) | |
2604 | return; | |
2605 | ||
2606 | /* | |
2607 | * Beacon from a new neighbor. | |
2608 | * Send a claim notify if one hasn't been sent recently. | |
2609 | * Don't add the neighbor yet. | |
2610 | */ | |
2611 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2612 | new->ids.port_id); | |
2613 | if (time_after(jiffies, | |
2614 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2615 | fcoe_ctlr_vn_send_claim(fip); | |
2616 | } | |
2617 | ||
2618 | /** | |
2619 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2620 | * @fip: The FCoE controller | |
2621 | * | |
2622 | * Called with ctlr_mutex held. | |
2623 | * Called only in state FIP_ST_VNMP_UP. | |
2624 | * Returns the soonest time for next age-out or a time far in the future. | |
2625 | */ | |
2626 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2627 | { | |
2628 | struct fc_lport *lport = fip->lp; | |
2629 | struct fc_rport_priv *rdata; | |
2630 | struct fcoe_rport *frport; | |
2631 | unsigned long next_time; | |
2632 | unsigned long deadline; | |
2633 | ||
2634 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
2635 | mutex_lock(&lport->disc.disc_mutex); | |
2636 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { | |
2637 | frport = fcoe_ctlr_rport(rdata); | |
2638 | if (!frport->time) | |
2639 | continue; | |
2640 | deadline = frport->time + | |
2641 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2642 | if (time_after_eq(jiffies, deadline)) { | |
2643 | frport->time = 0; | |
2644 | LIBFCOE_FIP_DBG(fip, | |
2645 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2646 | rdata->ids.port_name, rdata->ids.port_id); | |
2647 | lport->tt.rport_logoff(rdata); | |
2648 | } else if (time_before(deadline, next_time)) | |
2649 | next_time = deadline; | |
2650 | } | |
2651 | mutex_unlock(&lport->disc.disc_mutex); | |
2652 | return next_time; | |
2653 | } | |
2654 | ||
2655 | /** | |
2656 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2657 | * @fip: The FCoE controller that received the frame | |
2658 | * @skb: The received FIP frame | |
2659 | * | |
2660 | * Returns non-zero if the frame is dropped. | |
2661 | * Always consumes the frame. | |
2662 | */ | |
2663 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2664 | { | |
2665 | struct fip_header *fiph; | |
2666 | enum fip_vn2vn_subcode sub; | |
2dc02ee5 | 2667 | struct { |
e10f8c66 JE |
2668 | struct fc_rport_priv rdata; |
2669 | struct fcoe_rport frport; | |
2670 | } buf; | |
2671 | int rc; | |
2672 | ||
2673 | fiph = (struct fip_header *)skb->data; | |
2674 | sub = fiph->fip_subcode; | |
2675 | ||
2676 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); | |
2677 | if (rc) { | |
2678 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2679 | goto drop; | |
2680 | } | |
2681 | ||
2682 | mutex_lock(&fip->ctlr_mutex); | |
2683 | switch (sub) { | |
2684 | case FIP_SC_VN_PROBE_REQ: | |
2685 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2686 | break; | |
2687 | case FIP_SC_VN_PROBE_REP: | |
2688 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2689 | break; | |
2690 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2691 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2692 | break; | |
2693 | case FIP_SC_VN_CLAIM_REP: | |
2694 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2695 | break; | |
2696 | case FIP_SC_VN_BEACON: | |
2697 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2698 | break; | |
2699 | default: | |
2700 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2701 | rc = -1; | |
2702 | break; | |
2703 | } | |
2704 | mutex_unlock(&fip->ctlr_mutex); | |
2705 | drop: | |
2706 | kfree_skb(skb); | |
2707 | return rc; | |
2708 | } | |
2709 | ||
2710 | /** | |
2711 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
92261156 JE |
2712 | * @lport: The local port |
2713 | * @fp: The received frame | |
e10f8c66 JE |
2714 | * |
2715 | * This should never be called since we don't see RSCNs or other | |
2716 | * fabric-generated ELSes. | |
2717 | */ | |
92261156 | 2718 | static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) |
e10f8c66 JE |
2719 | { |
2720 | struct fc_seq_els_data rjt_data; | |
2721 | ||
e10f8c66 JE |
2722 | rjt_data.reason = ELS_RJT_UNSUP; |
2723 | rjt_data.explan = ELS_EXPL_NONE; | |
92261156 | 2724 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
e10f8c66 JE |
2725 | fc_frame_free(fp); |
2726 | } | |
2727 | ||
2728 | /** | |
2729 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
2730 | * @fip: The FCoE controller | |
2731 | * | |
2732 | * This sets a flag indicating that remote ports should be created | |
2733 | * and started for the peers we discover. We use the disc_callback | |
2734 | * pointer as that flag. Peers already discovered are created here. | |
2735 | * | |
2736 | * The lport lock is held during this call. The callback must be done | |
2737 | * later, without holding either the lport or discovery locks. | |
2738 | * The fcoe_ctlr lock may also be held during this call. | |
2739 | */ | |
2740 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
2741 | enum fc_disc_event), | |
2742 | struct fc_lport *lport) | |
2743 | { | |
2744 | struct fc_disc *disc = &lport->disc; | |
2745 | struct fcoe_ctlr *fip = disc->priv; | |
2746 | ||
2747 | mutex_lock(&disc->disc_mutex); | |
2748 | disc->disc_callback = callback; | |
2749 | disc->disc_id = (disc->disc_id + 2) | 1; | |
2750 | disc->pending = 1; | |
2751 | schedule_work(&fip->timer_work); | |
2752 | mutex_unlock(&disc->disc_mutex); | |
2753 | } | |
2754 | ||
2755 | /** | |
2756 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
2757 | * @fip: The FCoE controller | |
2758 | * | |
2759 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
2760 | * we've received at least one beacon. | |
2761 | * Performs the discovery complete callback. | |
2762 | */ | |
2763 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
2764 | { | |
2765 | struct fc_lport *lport = fip->lp; | |
2766 | struct fc_disc *disc = &lport->disc; | |
2767 | struct fc_rport_priv *rdata; | |
2768 | struct fcoe_rport *frport; | |
2769 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
2770 | ||
2771 | mutex_lock(&disc->disc_mutex); | |
2772 | callback = disc->pending ? disc->disc_callback : NULL; | |
2773 | disc->pending = 0; | |
2774 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
2775 | frport = fcoe_ctlr_rport(rdata); | |
2776 | if (frport->time) | |
2777 | lport->tt.rport_login(rdata); | |
2778 | } | |
2779 | mutex_unlock(&disc->disc_mutex); | |
2780 | if (callback) | |
2781 | callback(lport, DISC_EV_SUCCESS); | |
2782 | } | |
2783 | ||
2784 | /** | |
2785 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
2786 | * @fip: The FCoE controller | |
2787 | */ | |
2788 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
2789 | { | |
2790 | unsigned long next_time; | |
2791 | u8 mac[ETH_ALEN]; | |
2792 | u32 new_port_id = 0; | |
2793 | ||
2794 | mutex_lock(&fip->ctlr_mutex); | |
2795 | switch (fip->state) { | |
2796 | case FIP_ST_VNMP_START: | |
2797 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
2798 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2799 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
2800 | break; | |
2801 | case FIP_ST_VNMP_PROBE1: | |
2802 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
2803 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2804 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2805 | break; | |
2806 | case FIP_ST_VNMP_PROBE2: | |
2807 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
2808 | new_port_id = fip->port_id; | |
2809 | hton24(mac, FIP_VN_FC_MAP); | |
2810 | hton24(mac + 3, new_port_id); | |
cd229e42 | 2811 | fcoe_ctlr_map_dest(fip); |
e10f8c66 JE |
2812 | fip->update_mac(fip->lp, mac); |
2813 | fcoe_ctlr_vn_send_claim(fip); | |
2814 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2815 | break; | |
2816 | case FIP_ST_VNMP_CLAIM: | |
2817 | /* | |
2818 | * This may be invoked either by starting discovery so don't | |
2819 | * go to the next state unless it's been long enough. | |
2820 | */ | |
2821 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2822 | if (time_after_eq(jiffies, next_time)) { | |
2823 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
2824 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2825 | fcoe_all_vn2vn, 0); | |
2826 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2827 | fip->port_ka_time = next_time; | |
2828 | } | |
2829 | fcoe_ctlr_vn_disc(fip); | |
2830 | break; | |
2831 | case FIP_ST_VNMP_UP: | |
2832 | next_time = fcoe_ctlr_vn_age(fip); | |
2833 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
2834 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2835 | fcoe_all_vn2vn, 0); | |
2836 | fip->port_ka_time = jiffies + | |
2837 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
3b60a64f | 2838 | (prandom_u32() % FIP_VN_BEACON_FUZZ)); |
e10f8c66 JE |
2839 | } |
2840 | if (time_before(fip->port_ka_time, next_time)) | |
2841 | next_time = fip->port_ka_time; | |
2842 | break; | |
2843 | case FIP_ST_LINK_WAIT: | |
2844 | goto unlock; | |
2845 | default: | |
11aa9900 | 2846 | WARN(1, "unexpected state %d\n", fip->state); |
e10f8c66 JE |
2847 | goto unlock; |
2848 | } | |
2849 | mod_timer(&fip->timer, next_time); | |
2850 | unlock: | |
2851 | mutex_unlock(&fip->ctlr_mutex); | |
2852 | ||
2853 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
2854 | if (new_port_id) | |
2855 | fc_lport_set_local_id(fip->lp, new_port_id); | |
2856 | } | |
2857 | ||
0db0e377 RL |
2858 | /** |
2859 | * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode | |
2860 | * @lport: The local port to be (re)configured | |
2861 | * @fip: The FCoE controller whose mode is changing | |
2862 | * @fip_mode: The new fip mode | |
2863 | * | |
2864 | * Note that the we shouldn't be changing the libfc discovery settings | |
2865 | * (fc_disc_config) while an lport is going through the libfc state | |
2866 | * machine. The mode can only be changed when a fcoe_ctlr device is | |
2867 | * disabled, so that should ensure that this routine is only called | |
2868 | * when nothing is happening. | |
2869 | */ | |
41463a88 BVA |
2870 | static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2871 | enum fip_state fip_mode) | |
0db0e377 RL |
2872 | { |
2873 | void *priv; | |
2874 | ||
2875 | WARN_ON(lport->state != LPORT_ST_RESET && | |
2876 | lport->state != LPORT_ST_DISABLED); | |
2877 | ||
2878 | if (fip_mode == FIP_MODE_VN2VN) { | |
2879 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
2880 | lport->point_to_multipoint = 1; | |
2881 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
2882 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
2883 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
2884 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
2885 | priv = fip; | |
2886 | } else { | |
2887 | lport->rport_priv_size = 0; | |
2888 | lport->point_to_multipoint = 0; | |
2889 | lport->tt.disc_recv_req = NULL; | |
2890 | lport->tt.disc_start = NULL; | |
2891 | lport->tt.disc_stop = NULL; | |
2892 | lport->tt.disc_stop_final = NULL; | |
2893 | priv = lport; | |
2894 | } | |
2895 | ||
2896 | fc_disc_config(lport, priv); | |
2897 | } | |
2898 | ||
5e80f7f7 | 2899 | /** |
70b51aab | 2900 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
8d55e507 RL |
2901 | * @lport: The local port to configure libfc for |
2902 | * @fip: The FCoE controller in use by the local port | |
2903 | * @tt: The libfc function template | |
e10f8c66 | 2904 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
2905 | * |
2906 | * Returns : 0 for success | |
2907 | */ | |
e10f8c66 JE |
2908 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2909 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
2910 | { |
2911 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 2912 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 2913 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 2914 | return -ENOMEM; |
70b51aab RL |
2915 | fc_exch_init(lport); |
2916 | fc_elsct_init(lport); | |
2917 | fc_lport_init(lport); | |
2918 | fc_rport_init(lport); | |
0807619d | 2919 | fc_disc_init(lport); |
0db0e377 | 2920 | fcoe_ctlr_mode_set(lport, fip, fip->mode); |
5e80f7f7 VD |
2921 | return 0; |
2922 | } | |
2923 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); | |
8d55e507 RL |
2924 | |
2925 | void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev) | |
2926 | { | |
2927 | struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev); | |
2928 | struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev); | |
2929 | struct fcoe_fcf *fcf; | |
2930 | ||
2931 | mutex_lock(&fip->ctlr_mutex); | |
2932 | mutex_lock(&ctlr_dev->lock); | |
2933 | ||
2934 | fcf = fcoe_fcf_device_priv(fcf_dev); | |
2935 | if (fcf) | |
2936 | fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0; | |
2937 | else | |
2938 | fcf_dev->selected = 0; | |
2939 | ||
2940 | mutex_unlock(&ctlr_dev->lock); | |
2941 | mutex_unlock(&fip->ctlr_mutex); | |
2942 | } | |
2943 | EXPORT_SYMBOL(fcoe_fcf_get_selected); | |
2944 | ||
435c8667 | 2945 | void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev) |
8d55e507 RL |
2946 | { |
2947 | struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); | |
0db0e377 | 2948 | struct fc_lport *lport = ctlr->lp; |
8d55e507 RL |
2949 | |
2950 | mutex_lock(&ctlr->ctlr_mutex); | |
435c8667 RL |
2951 | switch (ctlr_dev->mode) { |
2952 | case FIP_CONN_TYPE_VN2VN: | |
2953 | ctlr->mode = FIP_MODE_VN2VN; | |
8d55e507 | 2954 | break; |
435c8667 | 2955 | case FIP_CONN_TYPE_FABRIC: |
8d55e507 | 2956 | default: |
435c8667 | 2957 | ctlr->mode = FIP_MODE_FABRIC; |
8d55e507 RL |
2958 | break; |
2959 | } | |
435c8667 | 2960 | |
8d55e507 | 2961 | mutex_unlock(&ctlr->ctlr_mutex); |
0db0e377 RL |
2962 | |
2963 | fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode); | |
8d55e507 | 2964 | } |
435c8667 | 2965 | EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode); |