Commit | Line | Data |
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a61127c2 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
9b34ecff | 2 | /* |
97c8389d JE |
3 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
4 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff | 5 | * |
9b34ecff VD |
6 | * Maintained at www.Open-FCoE.org |
7 | */ | |
8 | ||
97c8389d | 9 | #include <linux/types.h> |
9b34ecff | 10 | #include <linux/module.h> |
97c8389d JE |
11 | #include <linux/kernel.h> |
12 | #include <linux/list.h> | |
13 | #include <linux/spinlock.h> | |
14 | #include <linux/timer.h> | |
5e80f7f7 | 15 | #include <linux/netdevice.h> |
97c8389d JE |
16 | #include <linux/etherdevice.h> |
17 | #include <linux/ethtool.h> | |
18 | #include <linux/if_ether.h> | |
19 | #include <linux/if_vlan.h> | |
97c8389d JE |
20 | #include <linux/errno.h> |
21 | #include <linux/bitops.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
97c8389d JE |
23 | #include <net/rtnetlink.h> |
24 | ||
25 | #include <scsi/fc/fc_els.h> | |
26 | #include <scsi/fc/fc_fs.h> | |
27 | #include <scsi/fc/fc_fip.h> | |
28 | #include <scsi/fc/fc_encaps.h> | |
29 | #include <scsi/fc/fc_fcoe.h> | |
e10f8c66 | 30 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
31 | |
32 | #include <scsi/libfc.h> | |
97c8389d | 33 | #include <scsi/libfcoe.h> |
9b34ecff | 34 | |
21b7b2f5 YZ |
35 | #include "libfcoe.h" |
36 | ||
97c8389d JE |
37 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
38 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
39 | ||
e99e88a9 | 40 | static void fcoe_ctlr_timeout(struct timer_list *); |
42913657 | 41 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d | 42 | static void fcoe_ctlr_recv_work(struct work_struct *); |
794d98e7 | 43 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); |
97c8389d | 44 | |
e10f8c66 JE |
45 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); |
46 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); | |
47 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); | |
48 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); | |
49 | ||
9a6cf881 HR |
50 | static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *, struct sk_buff *); |
51 | ||
97c8389d | 52 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
53 | static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; |
54 | static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; | |
55 | static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; | |
97c8389d | 56 | |
0095a921 | 57 | static const char * const fcoe_ctlr_states[] = { |
9b651da9 JE |
58 | [FIP_ST_DISABLED] = "DISABLED", |
59 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
60 | [FIP_ST_AUTO] = "AUTO", | |
61 | [FIP_ST_NON_FIP] = "NON_FIP", | |
62 | [FIP_ST_ENABLED] = "ENABLED", | |
e10f8c66 JE |
63 | [FIP_ST_VNMP_START] = "VNMP_START", |
64 | [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", | |
65 | [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", | |
66 | [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", | |
67 | [FIP_ST_VNMP_UP] = "VNMP_UP", | |
9b651da9 JE |
68 | }; |
69 | ||
70 | static const char *fcoe_ctlr_state(enum fip_state state) | |
71 | { | |
72 | const char *cp = "unknown"; | |
73 | ||
74 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
75 | cp = fcoe_ctlr_states[state]; | |
76 | if (!cp) | |
77 | cp = "unknown"; | |
78 | return cp; | |
79 | } | |
80 | ||
81 | /** | |
82 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
83 | * @fip: The FCoE controller | |
84 | * @state: The new state | |
85 | */ | |
86 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
87 | { | |
88 | if (state == fip->state) | |
89 | return; | |
90 | if (fip->lp) | |
91 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
92 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
93 | fip->state = state; | |
94 | } | |
95 | ||
70b51aab RL |
96 | /** |
97 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
98 | * @fcf: The FCF to check | |
99 | * | |
97c8389d JE |
100 | * Return non-zero if FCF fcoe_size has been validated. |
101 | */ | |
102 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
103 | { | |
104 | return (fcf->flags & FIP_FL_SOL) != 0; | |
105 | } | |
106 | ||
70b51aab RL |
107 | /** |
108 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
109 | * @fcf: The FCF to check | |
110 | * | |
97c8389d JE |
111 | * Return non-zero if the FCF is usable. |
112 | */ | |
113 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
114 | { | |
115 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
116 | ||
117 | return (fcf->flags & flags) == flags; | |
118 | } | |
119 | ||
cd229e42 JE |
120 | /** |
121 | * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses | |
122 | * @fip: The FCoE controller | |
123 | */ | |
124 | static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) | |
125 | { | |
126 | if (fip->mode == FIP_MODE_VN2VN) | |
127 | hton24(fip->dest_addr, FIP_VN_FC_MAP); | |
128 | else | |
129 | hton24(fip->dest_addr, FIP_DEF_FC_MAP); | |
130 | hton24(fip->dest_addr + 3, 0); | |
131 | fip->map_dest = 1; | |
132 | } | |
133 | ||
97c8389d | 134 | /** |
70b51aab RL |
135 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
136 | * @fip: The FCoE controller to initialize | |
97c8389d | 137 | */ |
8beb90aa | 138 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_mode mode) |
97c8389d | 139 | { |
9b651da9 | 140 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 141 | fip->mode = mode; |
9a6cf881 | 142 | fip->fip_resp = false; |
97c8389d | 143 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 144 | mutex_init(&fip->ctlr_mutex); |
794d98e7 | 145 | spin_lock_init(&fip->ctlr_lock); |
97c8389d | 146 | fip->flogi_oxid = FC_XID_UNKNOWN; |
e99e88a9 | 147 | timer_setup(&fip->timer, fcoe_ctlr_timeout, 0); |
42913657 | 148 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
149 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
150 | skb_queue_head_init(&fip->fip_recv_list); | |
151 | } | |
152 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
153 | ||
9d34876f RL |
154 | /** |
155 | * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device} | |
156 | * @new: The newly discovered FCF | |
157 | * | |
158 | * Called with fip->ctlr_mutex held | |
159 | */ | |
8d55e507 RL |
160 | static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new) |
161 | { | |
162 | struct fcoe_ctlr *fip = new->fip; | |
9d34876f | 163 | struct fcoe_ctlr_device *ctlr_dev; |
1c2c1b4f BVA |
164 | struct fcoe_fcf_device *temp, *fcf_dev; |
165 | int rc = -ENOMEM; | |
8d55e507 RL |
166 | |
167 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
168 | new->fabric_name, new->fcf_mac); | |
169 | ||
1c2c1b4f BVA |
170 | temp = kzalloc(sizeof(*temp), GFP_KERNEL); |
171 | if (!temp) | |
172 | goto out; | |
173 | ||
1c2c1b4f BVA |
174 | temp->fabric_name = new->fabric_name; |
175 | temp->switch_name = new->switch_name; | |
176 | temp->fc_map = new->fc_map; | |
177 | temp->vfid = new->vfid; | |
178 | memcpy(temp->mac, new->fcf_mac, ETH_ALEN); | |
179 | temp->priority = new->pri; | |
180 | temp->fka_period = new->fka_period; | |
181 | temp->selected = 0; /* default to unselected */ | |
182 | ||
8d55e507 | 183 | /* |
9d34876f RL |
184 | * If ctlr_dev doesn't exist then it means we're a libfcoe user |
185 | * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device. | |
186 | * fnic would be an example of a driver with this behavior. In this | |
187 | * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we | |
188 | * don't want to make sysfs changes. | |
8d55e507 | 189 | */ |
8d55e507 | 190 | |
9d34876f RL |
191 | ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip); |
192 | if (ctlr_dev) { | |
193 | mutex_lock(&ctlr_dev->lock); | |
194 | fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp); | |
195 | if (unlikely(!fcf_dev)) { | |
196 | rc = -ENOMEM; | |
55d0ac5d | 197 | mutex_unlock(&ctlr_dev->lock); |
9d34876f RL |
198 | goto out; |
199 | } | |
200 | ||
201 | /* | |
202 | * The fcoe_sysfs layer can return a CONNECTED fcf that | |
203 | * has a priv (fcf was never deleted) or a CONNECTED fcf | |
204 | * that doesn't have a priv (fcf was deleted). However, | |
205 | * libfcoe will always delete FCFs before trying to add | |
206 | * them. This is ensured because both recv_adv and | |
207 | * age_fcfs are protected by the the fcoe_ctlr's mutex. | |
208 | * This means that we should never get a FCF with a | |
209 | * non-NULL priv pointer. | |
210 | */ | |
211 | BUG_ON(fcf_dev->priv); | |
212 | ||
213 | fcf_dev->priv = new; | |
214 | new->fcf_dev = fcf_dev; | |
215 | mutex_unlock(&ctlr_dev->lock); | |
216 | } | |
8d55e507 RL |
217 | |
218 | list_add(&new->list, &fip->fcfs); | |
219 | fip->fcf_count++; | |
1c2c1b4f | 220 | rc = 0; |
8d55e507 | 221 | |
1c2c1b4f BVA |
222 | out: |
223 | kfree(temp); | |
8d55e507 RL |
224 | return rc; |
225 | } | |
226 | ||
9d34876f RL |
227 | /** |
228 | * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device} | |
229 | * @new: The FCF to be removed | |
230 | * | |
231 | * Called with fip->ctlr_mutex held | |
232 | */ | |
8d55e507 RL |
233 | static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new) |
234 | { | |
235 | struct fcoe_ctlr *fip = new->fip; | |
9d34876f | 236 | struct fcoe_ctlr_device *cdev; |
8d55e507 RL |
237 | struct fcoe_fcf_device *fcf_dev; |
238 | ||
239 | list_del(&new->list); | |
240 | fip->fcf_count--; | |
241 | ||
9d34876f RL |
242 | /* |
243 | * If ctlr_dev doesn't exist then it means we're a libfcoe user | |
244 | * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device | |
245 | * or a fcoe_fcf_device. | |
246 | * | |
247 | * fnic would be an example of a driver with this behavior. In this | |
248 | * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above), | |
249 | * but we don't want to make sysfs changes. | |
250 | */ | |
251 | cdev = fcoe_ctlr_to_ctlr_dev(fip); | |
252 | if (cdev) { | |
253 | mutex_lock(&cdev->lock); | |
254 | fcf_dev = fcoe_fcf_to_fcf_dev(new); | |
255 | WARN_ON(!fcf_dev); | |
256 | new->fcf_dev = NULL; | |
257 | fcoe_fcf_device_delete(fcf_dev); | |
258 | kfree(new); | |
259 | mutex_unlock(&cdev->lock); | |
260 | } | |
8d55e507 RL |
261 | } |
262 | ||
97c8389d | 263 | /** |
70b51aab RL |
264 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
265 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
266 | * |
267 | * Called with &fcoe_ctlr lock held. | |
268 | */ | |
269 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
270 | { | |
271 | struct fcoe_fcf *fcf; | |
272 | struct fcoe_fcf *next; | |
273 | ||
274 | fip->sel_fcf = NULL; | |
275 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
8d55e507 | 276 | fcoe_sysfs_fcf_del(fcf); |
97c8389d | 277 | } |
8d55e507 RL |
278 | WARN_ON(fip->fcf_count); |
279 | ||
97c8389d JE |
280 | fip->sel_time = 0; |
281 | } | |
282 | ||
283 | /** | |
70b51aab RL |
284 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
285 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
286 | * |
287 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
288 | * | |
289 | * The receive handler will have been deleted before this to guarantee | |
290 | * that no more recv_work will be scheduled. | |
291 | * | |
292 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
293 | * This guarantees that no further timeouts or work will be scheduled. | |
294 | */ | |
295 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
296 | { | |
a4b7cfae | 297 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 298 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 299 | |
fdb068c6 | 300 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 301 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 302 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 303 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 304 | del_timer_sync(&fip->timer); |
42913657 | 305 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
306 | } |
307 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
308 | ||
69316ee2 | 309 | /** |
794d98e7 | 310 | * fcoe_ctlr_announce() - announce new FCF selection |
69316ee2 JE |
311 | * @fip: The FCoE controller |
312 | * | |
313 | * Also sets the destination MAC for FCoE and control packets | |
794d98e7 JE |
314 | * |
315 | * Called with neither ctlr_mutex nor ctlr_lock held. | |
69316ee2 JE |
316 | */ |
317 | static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) | |
318 | { | |
794d98e7 JE |
319 | struct fcoe_fcf *sel; |
320 | struct fcoe_fcf *fcf; | |
321 | ||
322 | mutex_lock(&fip->ctlr_mutex); | |
323 | spin_lock_bh(&fip->ctlr_lock); | |
324 | ||
325 | kfree_skb(fip->flogi_req); | |
326 | fip->flogi_req = NULL; | |
327 | list_for_each_entry(fcf, &fip->fcfs, list) | |
328 | fcf->flogi_sent = 0; | |
329 | ||
330 | spin_unlock_bh(&fip->ctlr_lock); | |
331 | sel = fip->sel_fcf; | |
69316ee2 | 332 | |
6942df7f | 333 | if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr)) |
794d98e7 | 334 | goto unlock; |
69316ee2 JE |
335 | if (!is_zero_ether_addr(fip->dest_addr)) { |
336 | printk(KERN_NOTICE "libfcoe: host%d: " | |
337 | "FIP Fibre-Channel Forwarder MAC %pM deselected\n", | |
338 | fip->lp->host->host_no, fip->dest_addr); | |
339 | memset(fip->dest_addr, 0, ETH_ALEN); | |
340 | } | |
341 | if (sel) { | |
342 | printk(KERN_INFO "libfcoe: host%d: FIP selected " | |
343 | "Fibre-Channel Forwarder MAC %pM\n", | |
344 | fip->lp->host->host_no, sel->fcf_mac); | |
81c11dd2 | 345 | memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN); |
69316ee2 JE |
346 | fip->map_dest = 0; |
347 | } | |
794d98e7 JE |
348 | unlock: |
349 | mutex_unlock(&fip->ctlr_mutex); | |
69316ee2 JE |
350 | } |
351 | ||
97c8389d | 352 | /** |
70b51aab RL |
353 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
354 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
355 | * |
356 | * Returns the maximum packet size including the FCoE header and trailer, | |
357 | * but not including any Ethernet or VLAN headers. | |
358 | */ | |
359 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
360 | { | |
361 | /* | |
362 | * Determine the max FCoE frame size allowed, including | |
363 | * FCoE header and trailer. | |
364 | * Note: lp->mfs is currently the payload size, not the frame size. | |
365 | */ | |
366 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
367 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
368 | } | |
369 | ||
370 | /** | |
70b51aab RL |
371 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
372 | * @fip: The FCoE controller to send the solicitation on | |
373 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
374 | */ |
375 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
376 | { | |
377 | struct sk_buff *skb; | |
378 | struct fip_sol { | |
379 | struct ethhdr eth; | |
380 | struct fip_header fip; | |
381 | struct { | |
382 | struct fip_mac_desc mac; | |
383 | struct fip_wwn_desc wwnn; | |
384 | struct fip_size_desc size; | |
0095a921 YZ |
385 | } __packed desc; |
386 | } __packed * sol; | |
97c8389d JE |
387 | u32 fcoe_size; |
388 | ||
389 | skb = dev_alloc_skb(sizeof(*sol)); | |
390 | if (!skb) | |
391 | return; | |
392 | ||
393 | sol = (struct fip_sol *)skb->data; | |
394 | ||
395 | memset(sol, 0, sizeof(*sol)); | |
396 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
397 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
398 | sol->eth.h_proto = htons(ETH_P_FIP); | |
399 | ||
400 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
401 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
402 | sol->fip.fip_subcode = FIP_SC_SOL; | |
403 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
404 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
405 | if (fip->spma) |
406 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
407 | |
408 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
409 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
410 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
411 | ||
412 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
413 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
414 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
415 | ||
416 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
417 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
418 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
419 | sol->desc.size.fd_size = htons(fcoe_size); | |
420 | ||
421 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 422 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 423 | skb->priority = fip->priority; |
97c8389d JE |
424 | skb_reset_mac_header(skb); |
425 | skb_reset_network_header(skb); | |
426 | fip->send(fip, skb); | |
427 | ||
428 | if (!fcf) | |
429 | fip->sol_time = jiffies; | |
430 | } | |
431 | ||
432 | /** | |
70b51aab RL |
433 | * fcoe_ctlr_link_up() - Start FCoE controller |
434 | * @fip: The FCoE controller to start | |
97c8389d JE |
435 | * |
436 | * Called from the LLD when the network link is ready. | |
437 | */ | |
438 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
439 | { | |
fdb068c6 | 440 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 441 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 442 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
443 | fc_linkup(fip->lp); |
444 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
8beb90aa SD |
445 | if (fip->mode == FIP_MODE_NON_FIP) |
446 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); | |
447 | else | |
448 | fcoe_ctlr_set_state(fip, FIP_ST_AUTO); | |
e10f8c66 JE |
449 | switch (fip->mode) { |
450 | default: | |
451 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
452 | /* fall-through */ | |
453 | case FIP_MODE_AUTO: | |
0f51c2e5 | 454 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
455 | /* fall-through */ |
456 | case FIP_MODE_FABRIC: | |
457 | case FIP_MODE_NON_FIP: | |
458 | mutex_unlock(&fip->ctlr_mutex); | |
459 | fc_linkup(fip->lp); | |
460 | fcoe_ctlr_solicit(fip, NULL); | |
461 | break; | |
462 | case FIP_MODE_VN2VN: | |
463 | fcoe_ctlr_vn_start(fip); | |
464 | mutex_unlock(&fip->ctlr_mutex); | |
465 | fc_linkup(fip->lp); | |
466 | break; | |
467 | } | |
97c8389d | 468 | } else |
fdb068c6 | 469 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
470 | } |
471 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
472 | ||
473 | /** | |
70b51aab RL |
474 | * fcoe_ctlr_reset() - Reset a FCoE controller |
475 | * @fip: The FCoE controller to reset | |
97c8389d | 476 | */ |
dd42dac4 | 477 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 478 | { |
97c8389d JE |
479 | fcoe_ctlr_reset_fcfs(fip); |
480 | del_timer(&fip->timer); | |
97c8389d JE |
481 | fip->ctlr_ka_time = 0; |
482 | fip->port_ka_time = 0; | |
483 | fip->sol_time = 0; | |
484 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
cd229e42 | 485 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
486 | } |
487 | ||
488 | /** | |
70b51aab RL |
489 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
490 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
491 | * |
492 | * Returns non-zero if the link was up and now isn't. | |
493 | * | |
494 | * Called from the LLD when the network link is not ready. | |
495 | * There may be multiple calls while the link is down. | |
496 | */ | |
497 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
498 | { | |
dd42dac4 JE |
499 | int link_dropped; |
500 | ||
501 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 502 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 503 | fcoe_ctlr_reset(fip); |
42913657 | 504 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 505 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 506 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
507 | |
508 | if (link_dropped) | |
509 | fc_linkdown(fip->lp); | |
510 | return link_dropped; | |
97c8389d JE |
511 | } |
512 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
513 | ||
514 | /** | |
70b51aab RL |
515 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
516 | * @fip: The FCoE controller to send the FKA on | |
517 | * @lport: libfc fc_lport to send from | |
518 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
519 | * @sa: The source MAC address | |
97c8389d JE |
520 | * |
521 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
522 | * The source MAC is the native MAC address. | |
523 | * | |
524 | * A port keep-alive is sent every 90 seconds while logged in. | |
525 | * The source MAC is the assigned mapped source address. | |
526 | * The destination is the FCF's F-port. | |
527 | */ | |
11b56188 CL |
528 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
529 | struct fc_lport *lport, | |
530 | int ports, u8 *sa) | |
97c8389d JE |
531 | { |
532 | struct sk_buff *skb; | |
533 | struct fip_kal { | |
534 | struct ethhdr eth; | |
535 | struct fip_header fip; | |
536 | struct fip_mac_desc mac; | |
0095a921 | 537 | } __packed * kal; |
97c8389d JE |
538 | struct fip_vn_desc *vn; |
539 | u32 len; | |
540 | struct fc_lport *lp; | |
541 | struct fcoe_fcf *fcf; | |
542 | ||
543 | fcf = fip->sel_fcf; | |
544 | lp = fip->lp; | |
281ae642 | 545 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
546 | return; |
547 | ||
be276cbe | 548 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
549 | skb = dev_alloc_skb(len); |
550 | if (!skb) | |
551 | return; | |
552 | ||
553 | kal = (struct fip_kal *)skb->data; | |
554 | memset(kal, 0, len); | |
555 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
556 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
557 | kal->eth.h_proto = htons(ETH_P_FIP); | |
558 | ||
559 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
560 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
561 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
562 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 563 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 564 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
565 | if (fip->spma) |
566 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
567 | |
568 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
569 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
570 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
571 | if (ports) { |
572 | vn = (struct fip_vn_desc *)(kal + 1); | |
573 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
574 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 575 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
576 | hton24(vn->fd_fc_id, lport->port_id); |
577 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 578 | } |
97c8389d | 579 | skb_put(skb, len); |
0f491539 | 580 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 581 | skb->priority = fip->priority; |
97c8389d JE |
582 | skb_reset_mac_header(skb); |
583 | skb_reset_network_header(skb); | |
584 | fip->send(fip, skb); | |
585 | } | |
586 | ||
587 | /** | |
70b51aab RL |
588 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
589 | * @fip: The FCoE controller for the ELS frame | |
590 | * @dtype: The FIP descriptor type for the frame | |
591 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 592 | * @d_id: The destination port ID. |
97c8389d JE |
593 | * |
594 | * Returns non-zero error code on failure. | |
595 | * | |
596 | * The caller must check that the length is a multiple of 4. | |
597 | * | |
598 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
599 | * Headroom includes the FIP encapsulation description, FIP header, and | |
600 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
601 | */ | |
11b56188 | 602 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 603 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
604 | { |
605 | struct fip_encaps_head { | |
606 | struct ethhdr eth; | |
607 | struct fip_header fip; | |
608 | struct fip_encaps encaps; | |
0095a921 | 609 | } __packed * cap; |
5554345b | 610 | struct fc_frame_header *fh; |
97c8389d JE |
611 | struct fip_mac_desc *mac; |
612 | struct fcoe_fcf *fcf; | |
613 | size_t dlen; | |
5a84baea | 614 | u16 fip_flags; |
5554345b | 615 | u8 op; |
97c8389d | 616 | |
5554345b JE |
617 | fh = (struct fc_frame_header *)skb->data; |
618 | op = *(u8 *)(fh + 1); | |
97c8389d | 619 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
d58ff351 | 620 | cap = skb_push(skb, sizeof(*cap)); |
97c8389d | 621 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
622 | |
623 | if (lport->point_to_multipoint) { | |
624 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
625 | return -ENODEV; | |
5554345b | 626 | fip_flags = 0; |
e10f8c66 JE |
627 | } else { |
628 | fcf = fip->sel_fcf; | |
629 | if (!fcf) | |
630 | return -ENODEV; | |
631 | fip_flags = fcf->flags; | |
632 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
633 | FIP_FL_FPMA; | |
634 | if (!fip_flags) | |
635 | return -ENODEV; | |
636 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
637 | } | |
97c8389d JE |
638 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
639 | cap->eth.h_proto = htons(ETH_P_FIP); | |
640 | ||
641 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
642 | cap->fip.fip_op = htons(FIP_OP_LS); | |
5554345b JE |
643 | if (op == ELS_LS_ACC || op == ELS_LS_RJT) |
644 | cap->fip.fip_subcode = FIP_SC_REP; | |
645 | else | |
646 | cap->fip.fip_subcode = FIP_SC_REQ; | |
5a84baea | 647 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
648 | |
649 | cap->encaps.fd_desc.fip_dtype = dtype; | |
650 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
651 | ||
5554345b JE |
652 | if (op != ELS_LS_RJT) { |
653 | dlen += sizeof(*mac); | |
b080db58 | 654 | mac = skb_put_zero(skb, sizeof(*mac)); |
5554345b JE |
655 | mac->fd_desc.fip_dtype = FIP_DT_MAC; |
656 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
657 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { | |
658 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); | |
659 | } else if (fip->mode == FIP_MODE_VN2VN) { | |
660 | hton24(mac->fd_mac, FIP_VN_FC_MAP); | |
661 | hton24(mac->fd_mac + 3, fip->port_id); | |
662 | } else if (fip_flags & FIP_FL_SPMA) { | |
663 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
664 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
665 | } else { | |
666 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
667 | /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ | |
668 | } | |
593abc07 | 669 | } |
5554345b | 670 | cap->fip.fip_dl_len = htons(dlen / FIP_BPW); |
97c8389d | 671 | |
0f491539 | 672 | skb->protocol = htons(ETH_P_FIP); |
6f6c2aa3 | 673 | skb->priority = fip->priority; |
97c8389d JE |
674 | skb_reset_mac_header(skb); |
675 | skb_reset_network_header(skb); | |
676 | return 0; | |
677 | } | |
678 | ||
679 | /** | |
680 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
681 | * @fip: FCoE controller. | |
11b56188 | 682 | * @lport: libfc fc_lport to send from |
97c8389d JE |
683 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
684 | * | |
685 | * Returns a non-zero error code if the frame should not be sent. | |
686 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
687 | * | |
688 | * The caller must check that the length is a multiple of 4. | |
689 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 690 | * The the skb must also be an fc_frame. |
794d98e7 JE |
691 | * |
692 | * This is called from the lower-level driver with spinlocks held, | |
693 | * so we must not take a mutex here. | |
97c8389d | 694 | */ |
11b56188 CL |
695 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
696 | struct sk_buff *skb) | |
97c8389d | 697 | { |
e10f8c66 | 698 | struct fc_frame *fp; |
97c8389d JE |
699 | struct fc_frame_header *fh; |
700 | u16 old_xid; | |
701 | u8 op; | |
11b56188 | 702 | u8 mac[ETH_ALEN]; |
97c8389d | 703 | |
e10f8c66 | 704 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
705 | fh = (struct fc_frame_header *)skb->data; |
706 | op = *(u8 *)(fh + 1); | |
707 | ||
e10f8c66 | 708 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
709 | old_xid = fip->flogi_oxid; |
710 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
711 | if (fip->state == FIP_ST_AUTO) { | |
712 | if (old_xid == FC_XID_UNKNOWN) | |
713 | fip->flogi_count = 0; | |
714 | fip->flogi_count++; | |
715 | if (fip->flogi_count < 3) | |
716 | goto drop; | |
cd229e42 | 717 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
718 | return 0; |
719 | } | |
5f48f70e | 720 | if (fip->state == FIP_ST_NON_FIP) |
cd229e42 | 721 | fcoe_ctlr_map_dest(fip); |
5f48f70e JE |
722 | } |
723 | ||
724 | if (fip->state == FIP_ST_NON_FIP) | |
725 | return 0; | |
e10f8c66 | 726 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 727 | goto drop; |
5f48f70e JE |
728 | switch (op) { |
729 | case ELS_FLOGI: | |
97c8389d | 730 | op = FIP_DT_FLOGI; |
794d98e7 JE |
731 | if (fip->mode == FIP_MODE_VN2VN) |
732 | break; | |
733 | spin_lock_bh(&fip->ctlr_lock); | |
734 | kfree_skb(fip->flogi_req); | |
735 | fip->flogi_req = skb; | |
736 | fip->flogi_req_send = 1; | |
737 | spin_unlock_bh(&fip->ctlr_lock); | |
738 | schedule_work(&fip->timer_work); | |
739 | return -EINPROGRESS; | |
97c8389d JE |
740 | case ELS_FDISC: |
741 | if (ntoh24(fh->fh_s_id)) | |
742 | return 0; | |
743 | op = FIP_DT_FDISC; | |
744 | break; | |
745 | case ELS_LOGO: | |
e10f8c66 JE |
746 | if (fip->mode == FIP_MODE_VN2VN) { |
747 | if (fip->state != FIP_ST_VNMP_UP) | |
63d0e3df | 748 | goto drop; |
e10f8c66 | 749 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) |
63d0e3df | 750 | goto drop; |
e10f8c66 JE |
751 | } else { |
752 | if (fip->state != FIP_ST_ENABLED) | |
753 | return 0; | |
754 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
755 | return 0; | |
756 | } | |
97c8389d JE |
757 | op = FIP_DT_LOGO; |
758 | break; | |
759 | case ELS_LS_ACC: | |
97c8389d | 760 | /* |
e10f8c66 | 761 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
762 | * from a point-to-point connection. Switch to using |
763 | * the source mac based on the SID. The destination | |
25985edc | 764 | * MAC in this case would have been set by receiving the |
97c8389d JE |
765 | * FLOGI. |
766 | */ | |
e10f8c66 JE |
767 | if (fip->state == FIP_ST_NON_FIP) { |
768 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
769 | return 0; | |
770 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
771 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
772 | fip->update_mac(lport, mac); | |
773 | } | |
774 | /* fall through */ | |
775 | case ELS_LS_RJT: | |
776 | op = fr_encaps(fp); | |
777 | if (op) | |
778 | break; | |
97c8389d JE |
779 | return 0; |
780 | default: | |
e10f8c66 JE |
781 | if (fip->state != FIP_ST_ENABLED && |
782 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
783 | goto drop; |
784 | return 0; | |
785 | } | |
e10f8c66 JE |
786 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
787 | op, ntoh24(fh->fh_d_id)); | |
788 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
789 | goto drop; |
790 | fip->send(fip, skb); | |
791 | return -EINPROGRESS; | |
792 | drop: | |
c9596550 HR |
793 | LIBFCOE_FIP_DBG(fip, "drop els_send op %u d_id %x\n", |
794 | op, ntoh24(fh->fh_d_id)); | |
2d7d4fd3 | 795 | kfree_skb(skb); |
97c8389d JE |
796 | return -EINVAL; |
797 | } | |
798 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
799 | ||
70b51aab RL |
800 | /** |
801 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
802 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 803 | * |
f018b73a | 804 | * Called with lock held and preemption disabled. |
97c8389d | 805 | * |
8690cb83 JE |
806 | * An FCF is considered old if we have missed two advertisements. |
807 | * That is, there have been no valid advertisement from it for 2.5 | |
808 | * times its keep-alive period. | |
97c8389d JE |
809 | * |
810 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
811 | * |
812 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
813 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
814 | * |
815 | * Returns the time in jiffies for the next call. | |
97c8389d | 816 | */ |
8690cb83 | 817 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
818 | { |
819 | struct fcoe_fcf *fcf; | |
820 | struct fcoe_fcf *next; | |
8690cb83 JE |
821 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
822 | unsigned long deadline; | |
97c8389d | 823 | unsigned long sel_time = 0; |
8d55e507 | 824 | struct list_head del_list; |
1bd49b48 | 825 | struct fc_stats *stats; |
97c8389d | 826 | |
8d55e507 RL |
827 | INIT_LIST_HEAD(&del_list); |
828 | ||
1bd49b48 | 829 | stats = per_cpu_ptr(fip->lp->stats, get_cpu()); |
fdb068c6 | 830 | |
97c8389d | 831 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
832 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
833 | if (fip->sel_fcf == fcf) { | |
834 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
835 | stats->MissDiscAdvCount++; |
836 | printk(KERN_INFO "libfcoe: host%d: " | |
837 | "Missing Discovery Advertisement " | |
838 | "for fab %16.16llx count %lld\n", | |
839 | fip->lp->host->host_no, fcf->fabric_name, | |
840 | stats->MissDiscAdvCount); | |
841 | } else if (time_after(next_timer, deadline)) | |
842 | next_timer = deadline; | |
f3da80e7 | 843 | } |
8690cb83 JE |
844 | |
845 | deadline += fcf->fka_period; | |
d99ee45b | 846 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
847 | if (fip->sel_fcf == fcf) |
848 | fip->sel_fcf = NULL; | |
8d55e507 RL |
849 | /* |
850 | * Move to delete list so we can call | |
851 | * fcoe_sysfs_fcf_del (which can sleep) | |
852 | * after the put_cpu(). | |
853 | */ | |
97c8389d | 854 | list_del(&fcf->list); |
8d55e507 | 855 | list_add(&fcf->list, &del_list); |
f018b73a | 856 | stats->VLinkFailureCount++; |
8690cb83 JE |
857 | } else { |
858 | if (time_after(next_timer, deadline)) | |
859 | next_timer = deadline; | |
860 | if (fcoe_ctlr_mtu_valid(fcf) && | |
861 | (!sel_time || time_before(sel_time, fcf->time))) | |
862 | sel_time = fcf->time; | |
97c8389d JE |
863 | } |
864 | } | |
fdb068c6 | 865 | put_cpu(); |
8d55e507 RL |
866 | |
867 | list_for_each_entry_safe(fcf, next, &del_list, list) { | |
868 | /* Removes fcf from current list */ | |
869 | fcoe_sysfs_fcf_del(fcf); | |
870 | } | |
871 | ||
d99ee45b | 872 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
873 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
874 | fip->sel_time = sel_time; | |
97c8389d | 875 | } |
d99ee45b | 876 | |
8690cb83 | 877 | return next_timer; |
97c8389d JE |
878 | } |
879 | ||
880 | /** | |
70b51aab | 881 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 882 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
883 | * @skb: The received FIP advertisement frame |
884 | * @fcf: The resulting FCF entry | |
97c8389d JE |
885 | * |
886 | * Returns zero on a valid parsed advertisement, | |
887 | * otherwise returns non zero value. | |
888 | */ | |
0f51c2e5 JE |
889 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
890 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
891 | { |
892 | struct fip_header *fiph; | |
893 | struct fip_desc *desc = NULL; | |
894 | struct fip_wwn_desc *wwn; | |
895 | struct fip_fab_desc *fab; | |
896 | struct fip_fka_desc *fka; | |
897 | unsigned long t; | |
898 | size_t rlen; | |
899 | size_t dlen; | |
0a9c5d34 | 900 | u32 desc_mask; |
97c8389d JE |
901 | |
902 | memset(fcf, 0, sizeof(*fcf)); | |
903 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
904 | ||
905 | fiph = (struct fip_header *)skb->data; | |
906 | fcf->flags = ntohs(fiph->fip_flags); | |
907 | ||
0a9c5d34 BPG |
908 | /* |
909 | * mask of required descriptors. validating each one clears its bit. | |
910 | */ | |
911 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
912 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
913 | ||
97c8389d JE |
914 | rlen = ntohs(fiph->fip_dl_len) * 4; |
915 | if (rlen + sizeof(*fiph) > skb->len) | |
916 | return -EINVAL; | |
917 | ||
918 | desc = (struct fip_desc *)(fiph + 1); | |
919 | while (rlen > 0) { | |
920 | dlen = desc->fip_dlen * FIP_BPW; | |
921 | if (dlen < sizeof(*desc) || dlen > rlen) | |
922 | return -EINVAL; | |
0a9c5d34 BPG |
923 | /* Drop Adv if there are duplicate critical descriptors */ |
924 | if ((desc->fip_dtype < 32) && | |
925 | !(desc_mask & 1U << desc->fip_dtype)) { | |
926 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
927 | "Descriptors in FIP adv\n"); | |
928 | return -EINVAL; | |
929 | } | |
97c8389d JE |
930 | switch (desc->fip_dtype) { |
931 | case FIP_DT_PRI: | |
932 | if (dlen != sizeof(struct fip_pri_desc)) | |
933 | goto len_err; | |
934 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 935 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
936 | break; |
937 | case FIP_DT_MAC: | |
938 | if (dlen != sizeof(struct fip_mac_desc)) | |
939 | goto len_err; | |
940 | memcpy(fcf->fcf_mac, | |
941 | ((struct fip_mac_desc *)desc)->fd_mac, | |
942 | ETH_ALEN); | |
81c11dd2 | 943 | memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN); |
97c8389d | 944 | if (!is_valid_ether_addr(fcf->fcf_mac)) { |
e10f8c66 JE |
945 | LIBFCOE_FIP_DBG(fip, |
946 | "Invalid MAC addr %pM in FIP adv\n", | |
947 | fcf->fcf_mac); | |
97c8389d JE |
948 | return -EINVAL; |
949 | } | |
0a9c5d34 | 950 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
951 | break; |
952 | case FIP_DT_NAME: | |
953 | if (dlen != sizeof(struct fip_wwn_desc)) | |
954 | goto len_err; | |
955 | wwn = (struct fip_wwn_desc *)desc; | |
956 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 957 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
958 | break; |
959 | case FIP_DT_FAB: | |
960 | if (dlen != sizeof(struct fip_fab_desc)) | |
961 | goto len_err; | |
962 | fab = (struct fip_fab_desc *)desc; | |
963 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
964 | fcf->vfid = ntohs(fab->fd_vfid); | |
965 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 966 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
967 | break; |
968 | case FIP_DT_FKA: | |
969 | if (dlen != sizeof(struct fip_fka_desc)) | |
970 | goto len_err; | |
971 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
972 | if (fka->fd_flags & FIP_FKA_ADV_D) |
973 | fcf->fd_flags = 1; | |
97c8389d JE |
974 | t = ntohl(fka->fd_fka_period); |
975 | if (t >= FCOE_CTLR_MIN_FKA) | |
976 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 977 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
978 | break; |
979 | case FIP_DT_MAP_OUI: | |
980 | case FIP_DT_FCOE_SIZE: | |
981 | case FIP_DT_FLOGI: | |
982 | case FIP_DT_FDISC: | |
983 | case FIP_DT_LOGO: | |
984 | case FIP_DT_ELP: | |
985 | default: | |
0f51c2e5 | 986 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 987 | "in FIP adv\n", desc->fip_dtype); |
97c8389d | 988 | /* standard says ignore unknown descriptors >= 128 */ |
6a551c11 | 989 | if (desc->fip_dtype < FIP_DT_NON_CRITICAL) |
97c8389d | 990 | return -EINVAL; |
1508f3ec | 991 | break; |
97c8389d JE |
992 | } |
993 | desc = (struct fip_desc *)((char *)desc + dlen); | |
994 | rlen -= dlen; | |
995 | } | |
996 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
997 | return -EINVAL; | |
240778e8 | 998 | if (!fcf->switch_name) |
97c8389d | 999 | return -EINVAL; |
0a9c5d34 BPG |
1000 | if (desc_mask) { |
1001 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
1002 | desc_mask); | |
1003 | return -EINVAL; | |
1004 | } | |
97c8389d JE |
1005 | return 0; |
1006 | ||
1007 | len_err: | |
0f51c2e5 | 1008 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1009 | desc->fip_dtype, dlen); |
97c8389d JE |
1010 | return -EINVAL; |
1011 | } | |
1012 | ||
1013 | /** | |
70b51aab RL |
1014 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
1015 | * @fip: The FCoE controller receiving the advertisement | |
1016 | * @skb: The received FIP packet | |
97c8389d JE |
1017 | */ |
1018 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1019 | { | |
1020 | struct fcoe_fcf *fcf; | |
1021 | struct fcoe_fcf new; | |
97c8389d JE |
1022 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); |
1023 | int first = 0; | |
1024 | int mtu_valid; | |
8d55e507 RL |
1025 | int found = 0; |
1026 | int rc = 0; | |
97c8389d | 1027 | |
0f51c2e5 | 1028 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
1029 | return; |
1030 | ||
fdb068c6 | 1031 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1032 | first = list_empty(&fip->fcfs); |
97c8389d JE |
1033 | list_for_each_entry(fcf, &fip->fcfs, list) { |
1034 | if (fcf->switch_name == new.switch_name && | |
1035 | fcf->fabric_name == new.fabric_name && | |
1036 | fcf->fc_map == new.fc_map && | |
6942df7f | 1037 | ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) { |
8d55e507 | 1038 | found = 1; |
97c8389d JE |
1039 | break; |
1040 | } | |
1041 | } | |
1042 | if (!found) { | |
1043 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
1044 | goto out; | |
1045 | ||
1046 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
1047 | if (!fcf) | |
1048 | goto out; | |
1049 | ||
97c8389d | 1050 | memcpy(fcf, &new, sizeof(new)); |
8d55e507 RL |
1051 | fcf->fip = fip; |
1052 | rc = fcoe_sysfs_fcf_add(fcf); | |
1053 | if (rc) { | |
1054 | printk(KERN_ERR "Failed to allocate sysfs instance " | |
1055 | "for FCF, fab %16.16llx mac %pM\n", | |
1056 | new.fabric_name, new.fcf_mac); | |
1057 | kfree(fcf); | |
1058 | goto out; | |
1059 | } | |
97c8389d JE |
1060 | } else { |
1061 | /* | |
c600fea2 JE |
1062 | * Update the FCF's keep-alive descriptor flags. |
1063 | * Other flag changes from new advertisements are | |
1064 | * ignored after a solicited advertisement is | |
1065 | * received and the FCF is selectable (usable). | |
97c8389d | 1066 | */ |
c600fea2 JE |
1067 | fcf->fd_flags = new.fd_flags; |
1068 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
1069 | fcf->flags = new.flags; | |
1070 | ||
d99ee45b | 1071 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
1072 | fip->ctlr_ka_time -= fcf->fka_period; |
1073 | fip->ctlr_ka_time += new.fka_period; | |
1074 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1075 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 1076 | } |
97c8389d JE |
1077 | fcf->fka_period = new.fka_period; |
1078 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
1079 | } | |
8d55e507 | 1080 | |
97c8389d JE |
1081 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); |
1082 | fcf->time = jiffies; | |
9069f5c4 JE |
1083 | if (!found) |
1084 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
1085 | fcf->fabric_name, fcf->fcf_mac); | |
97c8389d JE |
1086 | |
1087 | /* | |
1088 | * If this advertisement is not solicited and our max receive size | |
1089 | * hasn't been verified, send a solicited advertisement. | |
1090 | */ | |
1091 | if (!mtu_valid) | |
1092 | fcoe_ctlr_solicit(fip, fcf); | |
1093 | ||
1094 | /* | |
1095 | * If its been a while since we did a solicit, and this is | |
1096 | * the first advertisement we've received, do a multicast | |
1097 | * solicitation to gather as many advertisements as we can | |
1098 | * before selection occurs. | |
1099 | */ | |
1100 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
1101 | fcoe_ctlr_solicit(fip, NULL); | |
1102 | ||
981c1154 JE |
1103 | /* |
1104 | * Put this FCF at the head of the list for priority among equals. | |
1105 | * This helps in the case of an NPV switch which insists we use | |
1106 | * the FCF that answers multicast solicitations, not the others that | |
1107 | * are sending periodic multicast advertisements. | |
1108 | */ | |
63ce2499 KS |
1109 | if (mtu_valid) |
1110 | list_move(&fcf->list, &fip->fcfs); | |
981c1154 | 1111 | |
97c8389d JE |
1112 | /* |
1113 | * If this is the first validated FCF, note the time and | |
1114 | * set a timer to trigger selection. | |
1115 | */ | |
eac00c8a UK |
1116 | if (mtu_valid && !fip->sel_fcf && !fip->sel_time && |
1117 | fcoe_ctlr_fcf_usable(fcf)) { | |
97c8389d | 1118 | fip->sel_time = jiffies + |
70b51aab | 1119 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1120 | if (!timer_pending(&fip->timer) || |
1121 | time_before(fip->sel_time, fip->timer.expires)) | |
1122 | mod_timer(&fip->timer, fip->sel_time); | |
1123 | } | |
8d55e507 | 1124 | |
97c8389d | 1125 | out: |
fdb068c6 | 1126 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1127 | } |
1128 | ||
1129 | /** | |
70b51aab RL |
1130 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
1131 | * @fip: The FCoE controller which received the packet | |
1132 | * @skb: The received FIP packet | |
97c8389d JE |
1133 | */ |
1134 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1135 | { | |
70b51aab | 1136 | struct fc_lport *lport = fip->lp; |
97c8389d | 1137 | struct fip_header *fiph; |
11b56188 | 1138 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
1139 | struct fc_frame_header *fh = NULL; |
1140 | struct fip_desc *desc; | |
1141 | struct fip_encaps *els; | |
81c11dd2 | 1142 | struct fcoe_fcf *sel; |
1bd49b48 | 1143 | struct fc_stats *stats; |
97c8389d JE |
1144 | enum fip_desc_type els_dtype = 0; |
1145 | u8 els_op; | |
1146 | u8 sub; | |
1147 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
1148 | size_t els_len = 0; | |
1149 | size_t rlen; | |
1150 | size_t dlen; | |
be61331d BPG |
1151 | u32 desc_mask = 0; |
1152 | u32 desc_cnt = 0; | |
97c8389d JE |
1153 | |
1154 | fiph = (struct fip_header *)skb->data; | |
1155 | sub = fiph->fip_subcode; | |
1156 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
1157 | goto drop; | |
1158 | ||
1159 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1160 | if (rlen + sizeof(*fiph) > skb->len) | |
1161 | goto drop; | |
1162 | ||
1163 | desc = (struct fip_desc *)(fiph + 1); | |
1164 | while (rlen > 0) { | |
be61331d | 1165 | desc_cnt++; |
97c8389d JE |
1166 | dlen = desc->fip_dlen * FIP_BPW; |
1167 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1168 | goto drop; | |
0a9c5d34 BPG |
1169 | /* Drop ELS if there are duplicate critical descriptors */ |
1170 | if (desc->fip_dtype < 32) { | |
81c11dd2 BPG |
1171 | if ((desc->fip_dtype != FIP_DT_MAC) && |
1172 | (desc_mask & 1U << desc->fip_dtype)) { | |
0a9c5d34 BPG |
1173 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
1174 | "Descriptors in FIP ELS\n"); | |
1175 | goto drop; | |
1176 | } | |
be61331d | 1177 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 1178 | } |
97c8389d JE |
1179 | switch (desc->fip_dtype) { |
1180 | case FIP_DT_MAC: | |
81c11dd2 | 1181 | sel = fip->sel_fcf; |
be61331d BPG |
1182 | if (desc_cnt == 1) { |
1183 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1184 | "received out of order\n"); | |
1185 | goto drop; | |
1186 | } | |
81c11dd2 BPG |
1187 | /* |
1188 | * Some switch implementations send two MAC descriptors, | |
1189 | * with first MAC(granted_mac) being the FPMA, and the | |
1190 | * second one(fcoe_mac) is used as destination address | |
1191 | * for sending/receiving FCoE packets. FIP traffic is | |
1192 | * sent using fip_mac. For regular switches, both | |
1193 | * fip_mac and fcoe_mac would be the same. | |
1194 | */ | |
1195 | if (desc_cnt == 2) | |
1196 | memcpy(granted_mac, | |
1197 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1198 | ETH_ALEN); | |
be61331d | 1199 | |
97c8389d JE |
1200 | if (dlen != sizeof(struct fip_mac_desc)) |
1201 | goto len_err; | |
81c11dd2 BPG |
1202 | |
1203 | if ((desc_cnt == 3) && (sel)) | |
1204 | memcpy(sel->fcoe_mac, | |
1205 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1206 | ETH_ALEN); | |
97c8389d JE |
1207 | break; |
1208 | case FIP_DT_FLOGI: | |
1209 | case FIP_DT_FDISC: | |
1210 | case FIP_DT_LOGO: | |
1211 | case FIP_DT_ELP: | |
be61331d BPG |
1212 | if (desc_cnt != 1) { |
1213 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1214 | "received out of order\n"); | |
1215 | goto drop; | |
1216 | } | |
97c8389d JE |
1217 | if (fh) |
1218 | goto drop; | |
1219 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1220 | goto len_err; | |
1221 | els_len = dlen - sizeof(*els); | |
1222 | els = (struct fip_encaps *)desc; | |
1223 | fh = (struct fc_frame_header *)(els + 1); | |
1224 | els_dtype = desc->fip_dtype; | |
1225 | break; | |
1226 | default: | |
0f51c2e5 | 1227 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1228 | "in FIP adv\n", desc->fip_dtype); |
97c8389d | 1229 | /* standard says ignore unknown descriptors >= 128 */ |
6a551c11 | 1230 | if (desc->fip_dtype < FIP_DT_NON_CRITICAL) |
97c8389d | 1231 | goto drop; |
be61331d BPG |
1232 | if (desc_cnt <= 2) { |
1233 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1234 | "received out of order\n"); | |
1235 | goto drop; | |
1236 | } | |
1508f3ec | 1237 | break; |
97c8389d JE |
1238 | } |
1239 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1240 | rlen -= dlen; | |
1241 | } | |
1242 | ||
1243 | if (!fh) | |
1244 | goto drop; | |
1245 | els_op = *(u8 *)(fh + 1); | |
1246 | ||
e10f8c66 | 1247 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
794d98e7 JE |
1248 | sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { |
1249 | if (els_op == ELS_LS_ACC) { | |
1250 | if (!is_valid_ether_addr(granted_mac)) { | |
1251 | LIBFCOE_FIP_DBG(fip, | |
1252 | "Invalid MAC address %pM in FIP ELS\n", | |
1253 | granted_mac); | |
1254 | goto drop; | |
1255 | } | |
1256 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
e10f8c66 | 1257 | |
794d98e7 JE |
1258 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
1259 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1260 | if (els_dtype == FIP_DT_FLOGI) | |
1261 | fcoe_ctlr_announce(fip); | |
1262 | } | |
1263 | } else if (els_dtype == FIP_DT_FLOGI && | |
1264 | !fcoe_ctlr_flogi_retry(fip)) | |
1265 | goto drop; /* retrying FLOGI so drop reject */ | |
e10f8c66 | 1266 | } |
97c8389d | 1267 | |
be61331d BPG |
1268 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1269 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1270 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1271 | "in FIP ELS\n"); | |
1272 | goto drop; | |
1273 | } | |
1274 | ||
97c8389d JE |
1275 | /* |
1276 | * Convert skb into an fc_frame containing only the ELS. | |
1277 | */ | |
1278 | skb_pull(skb, (u8 *)fh - skb->data); | |
1279 | skb_trim(skb, els_len); | |
1280 | fp = (struct fc_frame *)skb; | |
1281 | fc_frame_init(fp); | |
1282 | fr_sof(fp) = FC_SOF_I3; | |
1283 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1284 | fr_dev(fp) = lport; |
e10f8c66 | 1285 | fr_encaps(fp) = els_dtype; |
97c8389d | 1286 | |
1bd49b48 | 1287 | stats = per_cpu_ptr(lport->stats, get_cpu()); |
97c8389d JE |
1288 | stats->RxFrames++; |
1289 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1290 | put_cpu(); |
97c8389d | 1291 | |
70b51aab | 1292 | fc_exch_recv(lport, fp); |
97c8389d JE |
1293 | return; |
1294 | ||
1295 | len_err: | |
0f51c2e5 | 1296 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1297 | desc->fip_dtype, dlen); |
97c8389d JE |
1298 | drop: |
1299 | kfree_skb(skb); | |
1300 | } | |
1301 | ||
1302 | /** | |
70b51aab RL |
1303 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1304 | * @fip: The FCoE controller that received the frame | |
1305 | * @fh: The received FIP header | |
97c8389d JE |
1306 | * |
1307 | * There may be multiple VN_Port descriptors. | |
1308 | * The overall length has already been checked. | |
1309 | */ | |
1310 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
fd37f66e | 1311 | struct sk_buff *skb) |
97c8389d JE |
1312 | { |
1313 | struct fip_desc *desc; | |
1314 | struct fip_mac_desc *mp; | |
1315 | struct fip_wwn_desc *wp; | |
1316 | struct fip_vn_desc *vp; | |
1317 | size_t rlen; | |
1318 | size_t dlen; | |
1319 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1320 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1321 | struct fc_lport *vn_port = NULL; |
1322 | u32 desc_mask; | |
c051ad2e BPG |
1323 | int num_vlink_desc; |
1324 | int reset_phys_port = 0; | |
1325 | struct fip_vn_desc **vlink_desc_arr = NULL; | |
fd37f66e CD |
1326 | struct fip_header *fh = (struct fip_header *)skb->data; |
1327 | struct ethhdr *eh = eth_hdr(skb); | |
97c8389d | 1328 | |
0f51c2e5 | 1329 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1330 | |
fd37f66e | 1331 | if (!fcf) { |
b2593cbe BPG |
1332 | /* |
1333 | * We are yet to select best FCF, but we got CVL in the | |
1334 | * meantime. reset the ctlr and let it rediscover the FCF | |
1335 | */ | |
fd37f66e CD |
1336 | LIBFCOE_FIP_DBG(fip, "Resetting fcoe_ctlr as FCF has not been " |
1337 | "selected yet\n"); | |
b2593cbe BPG |
1338 | mutex_lock(&fip->ctlr_mutex); |
1339 | fcoe_ctlr_reset(fip); | |
1340 | mutex_unlock(&fip->ctlr_mutex); | |
97c8389d | 1341 | return; |
b2593cbe | 1342 | } |
97c8389d | 1343 | |
fd37f66e CD |
1344 | /* |
1345 | * If we've selected an FCF check that the CVL is from there to avoid | |
1346 | * processing CVLs from an unexpected source. If it is from an | |
1347 | * unexpected source drop it on the floor. | |
1348 | */ | |
1349 | if (!ether_addr_equal(eh->h_source, fcf->fcf_mac)) { | |
1350 | LIBFCOE_FIP_DBG(fip, "Dropping CVL due to source address " | |
1351 | "mismatch with FCF src=%pM\n", eh->h_source); | |
1352 | return; | |
1353 | } | |
1354 | ||
1355 | /* | |
1356 | * If we haven't logged into the fabric but receive a CVL we should | |
1357 | * reset everything and go back to solicitation. | |
1358 | */ | |
1359 | if (!lport->port_id) { | |
1360 | LIBFCOE_FIP_DBG(fip, "lport not logged in, resoliciting\n"); | |
1361 | mutex_lock(&fip->ctlr_mutex); | |
1362 | fcoe_ctlr_reset(fip); | |
1363 | mutex_unlock(&fip->ctlr_mutex); | |
1364 | fc_lport_reset(fip->lp); | |
1365 | fcoe_ctlr_solicit(fip, NULL); | |
1366 | return; | |
1367 | } | |
1368 | ||
97c8389d JE |
1369 | /* |
1370 | * mask of required descriptors. Validating each one clears its bit. | |
1371 | */ | |
c051ad2e | 1372 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); |
97c8389d JE |
1373 | |
1374 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1375 | desc = (struct fip_desc *)(fh + 1); | |
c051ad2e BPG |
1376 | |
1377 | /* | |
1378 | * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen' | |
1379 | * before determining max Vx_Port descriptor but a buggy FCF could have | |
0cf2a848 | 1380 | * omitted either or both MAC Address and Name Identifier descriptors |
c051ad2e BPG |
1381 | */ |
1382 | num_vlink_desc = rlen / sizeof(*vp); | |
1383 | if (num_vlink_desc) | |
6da2ec56 KC |
1384 | vlink_desc_arr = kmalloc_array(num_vlink_desc, sizeof(vp), |
1385 | GFP_ATOMIC); | |
c051ad2e BPG |
1386 | if (!vlink_desc_arr) |
1387 | return; | |
1388 | num_vlink_desc = 0; | |
1389 | ||
97c8389d JE |
1390 | while (rlen >= sizeof(*desc)) { |
1391 | dlen = desc->fip_dlen * FIP_BPW; | |
1392 | if (dlen > rlen) | |
c051ad2e | 1393 | goto err; |
0a9c5d34 BPG |
1394 | /* Drop CVL if there are duplicate critical descriptors */ |
1395 | if ((desc->fip_dtype < 32) && | |
c051ad2e | 1396 | (desc->fip_dtype != FIP_DT_VN_ID) && |
0a9c5d34 BPG |
1397 | !(desc_mask & 1U << desc->fip_dtype)) { |
1398 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1399 | "Descriptors in FIP CVL\n"); | |
c051ad2e | 1400 | goto err; |
0a9c5d34 | 1401 | } |
97c8389d JE |
1402 | switch (desc->fip_dtype) { |
1403 | case FIP_DT_MAC: | |
1404 | mp = (struct fip_mac_desc *)desc; | |
1405 | if (dlen < sizeof(*mp)) | |
c051ad2e | 1406 | goto err; |
6942df7f | 1407 | if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac)) |
c051ad2e | 1408 | goto err; |
97c8389d JE |
1409 | desc_mask &= ~BIT(FIP_DT_MAC); |
1410 | break; | |
1411 | case FIP_DT_NAME: | |
1412 | wp = (struct fip_wwn_desc *)desc; | |
1413 | if (dlen < sizeof(*wp)) | |
c051ad2e | 1414 | goto err; |
97c8389d | 1415 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) |
c051ad2e | 1416 | goto err; |
97c8389d JE |
1417 | desc_mask &= ~BIT(FIP_DT_NAME); |
1418 | break; | |
1419 | case FIP_DT_VN_ID: | |
1420 | vp = (struct fip_vn_desc *)desc; | |
1421 | if (dlen < sizeof(*vp)) | |
c051ad2e BPG |
1422 | goto err; |
1423 | vlink_desc_arr[num_vlink_desc++] = vp; | |
1424 | vn_port = fc_vport_id_lookup(lport, | |
1425 | ntoh24(vp->fd_fc_id)); | |
1426 | if (vn_port && (vn_port == lport)) { | |
1427 | mutex_lock(&fip->ctlr_mutex); | |
1bd49b48 | 1428 | per_cpu_ptr(lport->stats, |
c051ad2e BPG |
1429 | get_cpu())->VLinkFailureCount++; |
1430 | put_cpu(); | |
1431 | fcoe_ctlr_reset(fip); | |
1432 | mutex_unlock(&fip->ctlr_mutex); | |
5550fda7 | 1433 | } |
97c8389d JE |
1434 | break; |
1435 | default: | |
1436 | /* standard says ignore unknown descriptors >= 128 */ | |
6a551c11 | 1437 | if (desc->fip_dtype < FIP_DT_NON_CRITICAL) |
c051ad2e | 1438 | goto err; |
97c8389d JE |
1439 | break; |
1440 | } | |
1441 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1442 | rlen -= dlen; | |
1443 | } | |
1444 | ||
1445 | /* | |
1446 | * reset only if all required descriptors were present and valid. | |
1447 | */ | |
c051ad2e | 1448 | if (desc_mask) |
0f51c2e5 JE |
1449 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1450 | desc_mask); | |
c051ad2e BPG |
1451 | else if (!num_vlink_desc) { |
1452 | LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n"); | |
1453 | /* | |
1454 | * No Vx_Port description. Clear all NPIV ports, | |
1455 | * followed by physical port | |
1456 | */ | |
c051ad2e | 1457 | mutex_lock(&fip->ctlr_mutex); |
1bd49b48 | 1458 | per_cpu_ptr(lport->stats, get_cpu())->VLinkFailureCount++; |
c051ad2e BPG |
1459 | put_cpu(); |
1460 | fcoe_ctlr_reset(fip); | |
1461 | mutex_unlock(&fip->ctlr_mutex); | |
1462 | ||
14619ea6 BPG |
1463 | mutex_lock(&lport->lp_mutex); |
1464 | list_for_each_entry(vn_port, &lport->vports, list) | |
1465 | fc_lport_reset(vn_port); | |
1466 | mutex_unlock(&lport->lp_mutex); | |
1467 | ||
c051ad2e BPG |
1468 | fc_lport_reset(fip->lp); |
1469 | fcoe_ctlr_solicit(fip, NULL); | |
97c8389d | 1470 | } else { |
c051ad2e | 1471 | int i; |
dd42dac4 | 1472 | |
c051ad2e BPG |
1473 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
1474 | for (i = 0; i < num_vlink_desc; i++) { | |
1475 | vp = vlink_desc_arr[i]; | |
1476 | vn_port = fc_vport_id_lookup(lport, | |
1477 | ntoh24(vp->fd_fc_id)); | |
1478 | if (!vn_port) | |
1479 | continue; | |
1480 | ||
1481 | /* | |
1482 | * 'port_id' is already validated, check MAC address and | |
1483 | * wwpn | |
1484 | */ | |
6942df7f JP |
1485 | if (!ether_addr_equal(fip->get_src_addr(vn_port), |
1486 | vp->fd_mac) || | |
c051ad2e BPG |
1487 | get_unaligned_be64(&vp->fd_wwpn) != |
1488 | vn_port->wwpn) | |
1489 | continue; | |
1490 | ||
1491 | if (vn_port == lport) | |
1492 | /* | |
1493 | * Physical port, defer processing till all | |
1494 | * listed NPIV ports are cleared | |
1495 | */ | |
1496 | reset_phys_port = 1; | |
1497 | else /* NPIV port */ | |
1498 | fc_lport_reset(vn_port); | |
1499 | } | |
5550fda7 | 1500 | |
c051ad2e | 1501 | if (reset_phys_port) { |
5550fda7 BPG |
1502 | fc_lport_reset(fip->lp); |
1503 | fcoe_ctlr_solicit(fip, NULL); | |
1504 | } | |
97c8389d | 1505 | } |
c051ad2e BPG |
1506 | |
1507 | err: | |
1508 | kfree(vlink_desc_arr); | |
97c8389d JE |
1509 | } |
1510 | ||
1511 | /** | |
70b51aab RL |
1512 | * fcoe_ctlr_recv() - Receive a FIP packet |
1513 | * @fip: The FCoE controller that received the packet | |
1514 | * @skb: The received FIP packet | |
97c8389d | 1515 | * |
1f4aed81 | 1516 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1517 | */ |
1518 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1519 | { | |
c0866286 NH |
1520 | skb = skb_share_check(skb, GFP_ATOMIC); |
1521 | if (!skb) | |
1522 | return; | |
1f4aed81 | 1523 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1524 | schedule_work(&fip->recv_work); |
1525 | } | |
1526 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1527 | ||
1528 | /** | |
70b51aab RL |
1529 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1530 | * @fip: The FCoE controller that received the frame | |
1531 | * @skb: The received FIP frame | |
97c8389d JE |
1532 | * |
1533 | * Returns non-zero if the frame is dropped. | |
1534 | */ | |
1535 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1536 | { | |
1537 | struct fip_header *fiph; | |
1538 | struct ethhdr *eh; | |
1539 | enum fip_state state; | |
9a6cf881 | 1540 | bool fip_vlan_resp = false; |
97c8389d JE |
1541 | u16 op; |
1542 | u8 sub; | |
1543 | ||
1544 | if (skb_linearize(skb)) | |
1545 | goto drop; | |
1546 | if (skb->len < sizeof(*fiph)) | |
1547 | goto drop; | |
1548 | eh = eth_hdr(skb); | |
e10f8c66 | 1549 | if (fip->mode == FIP_MODE_VN2VN) { |
6942df7f JP |
1550 | if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && |
1551 | !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) && | |
1552 | !ether_addr_equal(eh->h_dest, fcoe_all_p2p)) | |
e10f8c66 | 1553 | goto drop; |
6942df7f JP |
1554 | } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) && |
1555 | !ether_addr_equal(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1556 | goto drop; |
1557 | fiph = (struct fip_header *)skb->data; | |
1558 | op = ntohs(fiph->fip_op); | |
1559 | sub = fiph->fip_subcode; | |
1560 | ||
97c8389d JE |
1561 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1562 | goto drop; | |
1563 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1564 | goto drop; | |
1565 | ||
fdb068c6 | 1566 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1567 | state = fip->state; |
1568 | if (state == FIP_ST_AUTO) { | |
1569 | fip->map_dest = 0; | |
9b651da9 | 1570 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1571 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1572 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1573 | } |
9a6cf881 | 1574 | fip_vlan_resp = fip->fip_resp; |
fdb068c6 | 1575 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1576 | |
1577 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1578 | return fcoe_ctlr_vn_recv(fip, skb); | |
1579 | ||
9a6cf881 HR |
1580 | if (fip_vlan_resp && op == FIP_OP_VLAN) { |
1581 | LIBFCOE_FIP_DBG(fip, "fip vlan discovery\n"); | |
1582 | return fcoe_ctlr_vlan_recv(fip, skb); | |
1583 | } | |
1584 | ||
e10f8c66 JE |
1585 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && |
1586 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1587 | goto drop; |
1588 | ||
1589 | if (op == FIP_OP_LS) { | |
1590 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1591 | return 0; | |
1592 | } | |
e10f8c66 JE |
1593 | |
1594 | if (state != FIP_ST_ENABLED) | |
1595 | goto drop; | |
1596 | ||
97c8389d JE |
1597 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1598 | fcoe_ctlr_recv_adv(fip, skb); | |
1599 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
fd37f66e | 1600 | fcoe_ctlr_recv_clr_vlink(fip, skb); |
97c8389d JE |
1601 | kfree_skb(skb); |
1602 | return 0; | |
1603 | drop: | |
1604 | kfree_skb(skb); | |
1605 | return -1; | |
1606 | } | |
1607 | ||
1608 | /** | |
70b51aab RL |
1609 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1610 | * @fip: The FCoE controller | |
97c8389d | 1611 | * |
ba9cd5d0 JE |
1612 | * Returns the selected FCF, or NULL if none are usable. |
1613 | * | |
97c8389d JE |
1614 | * If there are conflicting advertisements, no FCF can be chosen. |
1615 | * | |
794d98e7 JE |
1616 | * If there is already a selected FCF, this will choose a better one or |
1617 | * an equivalent one that hasn't already been sent a FLOGI. | |
1618 | * | |
97c8389d JE |
1619 | * Called with lock held. |
1620 | */ | |
ba9cd5d0 | 1621 | static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) |
97c8389d JE |
1622 | { |
1623 | struct fcoe_fcf *fcf; | |
794d98e7 | 1624 | struct fcoe_fcf *best = fip->sel_fcf; |
97c8389d JE |
1625 | |
1626 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9069f5c4 JE |
1627 | LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " |
1628 | "VFID %d mac %pM map %x val %d " | |
1629 | "sent %u pri %u\n", | |
1630 | fcf->fabric_name, fcf->vfid, fcf->fcf_mac, | |
1631 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), | |
1632 | fcf->flogi_sent, fcf->pri); | |
97c8389d | 1633 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1634 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1635 | "map %x %svalid %savailable\n", | |
1636 | fcf->fabric_name, fcf->fc_map, | |
1637 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1638 | (fcf->flags & FIP_FL_AVAIL) ? | |
1639 | "" : "un"); | |
97c8389d JE |
1640 | continue; |
1641 | } | |
e6c10b7c KM |
1642 | if (!best || fcf->pri < best->pri || best->flogi_sent) |
1643 | best = fcf; | |
1644 | if (fcf->fabric_name != best->fabric_name || | |
1645 | fcf->vfid != best->vfid || | |
1646 | fcf->fc_map != best->fc_map) { | |
1f953b0d BPG |
1647 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " |
1648 | "or FC-MAP\n"); | |
1649 | return NULL; | |
1650 | } | |
97c8389d JE |
1651 | } |
1652 | fip->sel_fcf = best; | |
c47036a7 | 1653 | if (best) { |
9069f5c4 | 1654 | LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); |
c47036a7 JE |
1655 | fip->port_ka_time = jiffies + |
1656 | msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
1657 | fip->ctlr_ka_time = jiffies + best->fka_period; | |
1658 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1659 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
1660 | } | |
ba9cd5d0 | 1661 | return best; |
97c8389d JE |
1662 | } |
1663 | ||
794d98e7 JE |
1664 | /** |
1665 | * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF | |
1666 | * @fip: The FCoE controller | |
1667 | * | |
1668 | * Returns non-zero error if it could not be sent. | |
1669 | * | |
1670 | * Called with ctlr_mutex and ctlr_lock held. | |
1671 | * Caller must verify that fip->sel_fcf is not NULL. | |
1672 | */ | |
1673 | static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) | |
1674 | { | |
1675 | struct sk_buff *skb; | |
1676 | struct sk_buff *skb_orig; | |
1677 | struct fc_frame_header *fh; | |
1678 | int error; | |
1679 | ||
1680 | skb_orig = fip->flogi_req; | |
1681 | if (!skb_orig) | |
1682 | return -EINVAL; | |
1683 | ||
1684 | /* | |
1685 | * Clone and send the FLOGI request. If clone fails, use original. | |
1686 | */ | |
1687 | skb = skb_clone(skb_orig, GFP_ATOMIC); | |
1688 | if (!skb) { | |
1689 | skb = skb_orig; | |
1690 | fip->flogi_req = NULL; | |
1691 | } | |
1692 | fh = (struct fc_frame_header *)skb->data; | |
1693 | error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, | |
1694 | ntoh24(fh->fh_d_id)); | |
1695 | if (error) { | |
1696 | kfree_skb(skb); | |
1697 | return error; | |
1698 | } | |
1699 | fip->send(fip, skb); | |
1700 | fip->sel_fcf->flogi_sent = 1; | |
1701 | return 0; | |
1702 | } | |
1703 | ||
1704 | /** | |
1705 | * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible | |
1706 | * @fip: The FCoE controller | |
1707 | * | |
1708 | * Returns non-zero error code if there's no FLOGI request to retry or | |
1709 | * no alternate FCF available. | |
1710 | */ | |
1711 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) | |
1712 | { | |
1713 | struct fcoe_fcf *fcf; | |
1714 | int error; | |
1715 | ||
1716 | mutex_lock(&fip->ctlr_mutex); | |
1717 | spin_lock_bh(&fip->ctlr_lock); | |
1718 | LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1719 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1720 | if (!fcf || fcf->flogi_sent) { |
1721 | kfree_skb(fip->flogi_req); | |
1722 | fip->flogi_req = NULL; | |
1723 | error = -ENOENT; | |
1724 | } else { | |
1725 | fcoe_ctlr_solicit(fip, NULL); | |
1726 | error = fcoe_ctlr_flogi_send_locked(fip); | |
1727 | } | |
1728 | spin_unlock_bh(&fip->ctlr_lock); | |
1729 | mutex_unlock(&fip->ctlr_mutex); | |
1730 | return error; | |
1731 | } | |
1732 | ||
1733 | ||
1734 | /** | |
1735 | * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. | |
1736 | * @fip: The FCoE controller that timed out | |
1737 | * | |
1738 | * Done here because fcoe_ctlr_els_send() can't get mutex. | |
1739 | * | |
1740 | * Called with ctlr_mutex held. The caller must not hold ctlr_lock. | |
1741 | */ | |
1742 | static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) | |
1743 | { | |
1744 | struct fcoe_fcf *fcf; | |
1745 | ||
1746 | spin_lock_bh(&fip->ctlr_lock); | |
1747 | fcf = fip->sel_fcf; | |
1748 | if (!fcf || !fip->flogi_req_send) | |
1749 | goto unlock; | |
1750 | ||
1751 | LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); | |
1752 | ||
1753 | /* | |
1754 | * If this FLOGI is being sent due to a timeout retry | |
1755 | * to the same FCF as before, select a different FCF if possible. | |
1756 | */ | |
1757 | if (fcf->flogi_sent) { | |
1758 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1759 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1760 | if (!fcf || fcf->flogi_sent) { |
1761 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); | |
1762 | list_for_each_entry(fcf, &fip->fcfs, list) | |
1763 | fcf->flogi_sent = 0; | |
ba9cd5d0 | 1764 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1765 | } |
1766 | } | |
1767 | if (fcf) { | |
1768 | fcoe_ctlr_flogi_send_locked(fip); | |
1769 | fip->flogi_req_send = 0; | |
1770 | } else /* XXX */ | |
1771 | LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); | |
1772 | unlock: | |
1773 | spin_unlock_bh(&fip->ctlr_lock); | |
1774 | } | |
1775 | ||
97c8389d | 1776 | /** |
70b51aab RL |
1777 | * fcoe_ctlr_timeout() - FIP timeout handler |
1778 | * @arg: The FCoE controller that timed out | |
97c8389d | 1779 | */ |
e99e88a9 | 1780 | static void fcoe_ctlr_timeout(struct timer_list *t) |
97c8389d | 1781 | { |
e99e88a9 | 1782 | struct fcoe_ctlr *fip = from_timer(fip, t, timer); |
fdb068c6 JE |
1783 | |
1784 | schedule_work(&fip->timer_work); | |
1785 | } | |
1786 | ||
1787 | /** | |
1788 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1789 | * @work: Handle to a FCoE controller | |
1790 | * | |
1791 | * Ages FCFs. Triggers FCF selection if possible. | |
1792 | * Sends keep-alives and resets. | |
1793 | */ | |
1794 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1795 | { | |
1796 | struct fcoe_ctlr *fip; | |
1797 | struct fc_lport *vport; | |
1798 | u8 *mac; | |
1799 | u8 reset = 0; | |
1800 | u8 send_ctlr_ka = 0; | |
1801 | u8 send_port_ka = 0; | |
97c8389d JE |
1802 | struct fcoe_fcf *sel; |
1803 | struct fcoe_fcf *fcf; | |
8690cb83 | 1804 | unsigned long next_timer; |
97c8389d | 1805 | |
fdb068c6 | 1806 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1807 | if (fip->mode == FIP_MODE_VN2VN) |
1808 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1809 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1810 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1811 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1812 | return; |
1813 | } | |
1814 | ||
1815 | fcf = fip->sel_fcf; | |
8690cb83 | 1816 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1817 | |
1818 | sel = fip->sel_fcf; | |
8690cb83 JE |
1819 | if (!sel && fip->sel_time) { |
1820 | if (time_after_eq(jiffies, fip->sel_time)) { | |
ba9cd5d0 | 1821 | sel = fcoe_ctlr_select(fip); |
8690cb83 JE |
1822 | fip->sel_time = 0; |
1823 | } else if (time_after(next_timer, fip->sel_time)) | |
1824 | next_timer = fip->sel_time; | |
97c8389d JE |
1825 | } |
1826 | ||
794d98e7 JE |
1827 | if (sel && fip->flogi_req_send) |
1828 | fcoe_ctlr_flogi_send(fip); | |
1829 | else if (!sel && fcf) | |
1830 | reset = 1; | |
97c8389d | 1831 | |
8cdffdcc | 1832 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1833 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1834 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1835 | send_ctlr_ka = 1; |
97c8389d JE |
1836 | } |
1837 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1838 | next_timer = fip->ctlr_ka_time; | |
1839 | ||
1840 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1841 | fip->port_ka_time = jiffies + |
70b51aab | 1842 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1843 | send_port_ka = 1; |
97c8389d JE |
1844 | } |
1845 | if (time_after(next_timer, fip->port_ka_time)) | |
1846 | next_timer = fip->port_ka_time; | |
97c8389d | 1847 | } |
8690cb83 JE |
1848 | if (!list_empty(&fip->fcfs)) |
1849 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1850 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1851 | |
516a6486 | 1852 | if (reset) { |
dd42dac4 | 1853 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1854 | /* restart things with a solicitation */ |
1855 | fcoe_ctlr_solicit(fip, NULL); | |
1856 | } | |
11b56188 | 1857 | |
fdb068c6 | 1858 | if (send_ctlr_ka) |
11b56188 | 1859 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1860 | |
1861 | if (send_port_ka) { | |
11b56188 CL |
1862 | mutex_lock(&fip->lp->lp_mutex); |
1863 | mac = fip->get_src_addr(fip->lp); | |
1864 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1865 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1866 | mac = fip->get_src_addr(vport); | |
1867 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1868 | } | |
1869 | mutex_unlock(&fip->lp->lp_mutex); | |
1870 | } | |
97c8389d JE |
1871 | } |
1872 | ||
1873 | /** | |
70b51aab RL |
1874 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1875 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1876 | */ |
1877 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1878 | { | |
1879 | struct fcoe_ctlr *fip; | |
1880 | struct sk_buff *skb; | |
1881 | ||
1882 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1883 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1884 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1885 | } |
1886 | ||
1887 | /** | |
386309ce | 1888 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1889 | * @fip: The FCoE controller |
1890 | * @fp: The FC frame to snoop | |
97c8389d JE |
1891 | * |
1892 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1893 | * | |
1894 | * The caller has checked that we are waiting for login as indicated | |
1895 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1896 | * | |
1897 | * The caller is responsible for freeing the frame. | |
386309ce | 1898 | * Fill in the granted_mac address. |
97c8389d JE |
1899 | * |
1900 | * Return non-zero if the frame should not be delivered to libfc. | |
1901 | */ | |
11b56188 | 1902 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1903 | struct fc_frame *fp) |
97c8389d JE |
1904 | { |
1905 | struct fc_frame_header *fh; | |
1906 | u8 op; | |
386309ce | 1907 | u8 *sa; |
97c8389d | 1908 | |
386309ce | 1909 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1910 | fh = fc_frame_header_get(fp); |
1911 | if (fh->fh_type != FC_TYPE_ELS) | |
1912 | return 0; | |
1913 | ||
1914 | op = fc_frame_payload_op(fp); | |
1915 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1916 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1917 | ||
fdb068c6 | 1918 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1919 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1920 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1921 | return -EINVAL; |
1922 | } | |
9b651da9 | 1923 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1924 | LIBFCOE_FIP_DBG(fip, |
1925 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1926 | |
1927 | /* | |
1928 | * FLOGI accepted. | |
1929 | * If the src mac addr is FC_OUI-based, then we mark the | |
1930 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1931 | * Otherwise we use the FCoE gateway addr | |
1932 | */ | |
6942df7f | 1933 | if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { |
cd229e42 | 1934 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
1935 | } else { |
1936 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1937 | fip->map_dest = 0; | |
1938 | } | |
1939 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1940 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1941 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1942 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1943 | /* | |
1944 | * Save source MAC for point-to-point responses. | |
1945 | */ | |
fdb068c6 | 1946 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1947 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1948 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1949 | fip->map_dest = 0; | |
e49bf614 JE |
1950 | if (fip->state == FIP_ST_AUTO) |
1951 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1952 | "Setting non-FIP mode\n"); | |
9b651da9 | 1953 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1954 | } |
fdb068c6 | 1955 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1956 | } |
1957 | return 0; | |
1958 | } | |
1959 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1960 | ||
5e80f7f7 | 1961 | /** |
70b51aab RL |
1962 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1963 | * @mac: The MAC address to convert | |
1964 | * @scheme: The scheme to use when converting | |
1965 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1966 | * |
1967 | * Returns: u64 fc world wide name | |
1968 | */ | |
1969 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1970 | unsigned int scheme, unsigned int port) | |
1971 | { | |
1972 | u64 wwn; | |
1973 | u64 host_mac; | |
1974 | ||
1975 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1976 | host_mac = ((u64) mac[0] << 40) | | |
1977 | ((u64) mac[1] << 32) | | |
1978 | ((u64) mac[2] << 24) | | |
1979 | ((u64) mac[3] << 16) | | |
1980 | ((u64) mac[4] << 8) | | |
1981 | (u64) mac[5]; | |
1982 | ||
1983 | WARN_ON(host_mac >= (1ULL << 48)); | |
1984 | wwn = host_mac | ((u64) scheme << 60); | |
1985 | switch (scheme) { | |
1986 | case 1: | |
1987 | WARN_ON(port != 0); | |
1988 | break; | |
1989 | case 2: | |
1990 | WARN_ON(port >= 0xfff); | |
1991 | wwn |= (u64) port << 48; | |
1992 | break; | |
1993 | default: | |
1994 | WARN_ON(1); | |
1995 | break; | |
1996 | } | |
1997 | ||
1998 | return wwn; | |
1999 | } | |
2000 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
2001 | ||
e10f8c66 JE |
2002 | /** |
2003 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
2004 | * @rdata: libfc remote port | |
2005 | */ | |
2006 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
2007 | { | |
2008 | return (struct fcoe_rport *)(rdata + 1); | |
2009 | } | |
2010 | ||
2011 | /** | |
2012 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
2013 | * @fip: The FCoE controller | |
2014 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
2015 | * @dest: The destination Ethernet MAC address | |
2016 | * @min_len: minimum size of the Ethernet payload to be sent | |
2017 | */ | |
2018 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
2019 | enum fip_vn2vn_subcode sub, | |
2020 | const u8 *dest, size_t min_len) | |
2021 | { | |
2022 | struct sk_buff *skb; | |
b3d30f4a | 2023 | struct fip_vn2vn_probe_frame { |
e10f8c66 JE |
2024 | struct ethhdr eth; |
2025 | struct fip_header fip; | |
2026 | struct fip_mac_desc mac; | |
2027 | struct fip_wwn_desc wwnn; | |
2028 | struct fip_vn_desc vn; | |
0095a921 | 2029 | } __packed * frame; |
e10f8c66 JE |
2030 | struct fip_fc4_feat *ff; |
2031 | struct fip_size_desc *size; | |
2032 | u32 fcp_feat; | |
2033 | size_t len; | |
2034 | size_t dlen; | |
2035 | ||
2036 | len = sizeof(*frame); | |
2037 | dlen = 0; | |
2038 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
2039 | dlen = sizeof(struct fip_fc4_feat) + | |
2040 | sizeof(struct fip_size_desc); | |
2041 | len += dlen; | |
2042 | } | |
2043 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
2044 | len = max(len, min_len + sizeof(struct ethhdr)); | |
2045 | ||
2046 | skb = dev_alloc_skb(len); | |
2047 | if (!skb) | |
2048 | return; | |
2049 | ||
b3d30f4a | 2050 | frame = (struct fip_vn2vn_probe_frame *)skb->data; |
e10f8c66 JE |
2051 | memset(frame, 0, len); |
2052 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
d227f029 YZ |
2053 | |
2054 | if (sub == FIP_SC_VN_BEACON) { | |
2055 | hton24(frame->eth.h_source, FIP_VN_FC_MAP); | |
2056 | hton24(frame->eth.h_source + 3, fip->port_id); | |
2057 | } else { | |
2058 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
2059 | } | |
e10f8c66 JE |
2060 | frame->eth.h_proto = htons(ETH_P_FIP); |
2061 | ||
2062 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
2063 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
2064 | frame->fip.fip_subcode = sub; | |
2065 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
2066 | ||
2067 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
2068 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
2069 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
2070 | ||
2071 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
2072 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
2073 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
2074 | ||
2075 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
2076 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
2077 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
2078 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
2079 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
2080 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
2081 | ||
2082 | /* | |
2083 | * For claims, add FC-4 features. | |
2084 | * TBD: Add interface to get fc-4 types and features from libfc. | |
2085 | */ | |
2086 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
2087 | ff = (struct fip_fc4_feat *)(frame + 1); | |
2088 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
2089 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
2090 | ff->fd_fts = fip->lp->fcts; | |
2091 | ||
2092 | fcp_feat = 0; | |
2093 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
2094 | fcp_feat |= FCP_FEAT_INIT; | |
2095 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
2096 | fcp_feat |= FCP_FEAT_TARG; | |
2097 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
2098 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
2099 | ||
2100 | size = (struct fip_size_desc *)(ff + 1); | |
2101 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
2102 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
2103 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
2104 | } | |
2105 | ||
2106 | skb_put(skb, len); | |
2107 | skb->protocol = htons(ETH_P_FIP); | |
6f6c2aa3 | 2108 | skb->priority = fip->priority; |
e10f8c66 JE |
2109 | skb_reset_mac_header(skb); |
2110 | skb_reset_network_header(skb); | |
2111 | ||
2112 | fip->send(fip, skb); | |
2113 | } | |
2114 | ||
2115 | /** | |
2116 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
2117 | * @lport: The lport which is receiving the event | |
2118 | * @rdata: remote port private data | |
25985edc | 2119 | * @event: The event that occurred |
e10f8c66 JE |
2120 | * |
2121 | * Locking Note: The rport lock must not be held when calling this function. | |
2122 | */ | |
2123 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
2124 | struct fc_rport_priv *rdata, | |
2125 | enum fc_rport_event event) | |
2126 | { | |
2127 | struct fcoe_ctlr *fip = lport->disc.priv; | |
2128 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2129 | ||
2130 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
2131 | rdata->ids.port_id, event); | |
2132 | ||
2133 | mutex_lock(&fip->ctlr_mutex); | |
2134 | switch (event) { | |
2135 | case RPORT_EV_READY: | |
2136 | frport->login_count = 0; | |
2137 | break; | |
2138 | case RPORT_EV_LOGO: | |
2139 | case RPORT_EV_FAILED: | |
2140 | case RPORT_EV_STOP: | |
2141 | frport->login_count++; | |
2142 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
2143 | LIBFCOE_FIP_DBG(fip, | |
2144 | "rport FLOGI limited port_id %6.6x\n", | |
2145 | rdata->ids.port_id); | |
c96c792a | 2146 | fc_rport_logoff(rdata); |
e10f8c66 JE |
2147 | } |
2148 | break; | |
2149 | default: | |
2150 | break; | |
2151 | } | |
2152 | mutex_unlock(&fip->ctlr_mutex); | |
2153 | } | |
2154 | ||
2155 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
2156 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
2157 | }; | |
2158 | ||
2159 | /** | |
2160 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
2161 | * @fip: The FCoE controller | |
2162 | * | |
2163 | * Called with ctlr_mutex held. | |
2164 | */ | |
2165 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
2166 | { | |
d17efa00 MR |
2167 | struct fc_rport_priv *rdata; |
2168 | ||
0993ed92 | 2169 | mutex_lock(&lport->disc.disc_mutex); |
a407c593 HR |
2170 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { |
2171 | if (kref_get_unless_zero(&rdata->kref)) { | |
c96c792a | 2172 | fc_rport_logoff(rdata); |
944ef968 | 2173 | kref_put(&rdata->kref, fc_rport_destroy); |
a407c593 HR |
2174 | } |
2175 | } | |
e10f8c66 JE |
2176 | lport->disc.disc_callback = NULL; |
2177 | mutex_unlock(&lport->disc.disc_mutex); | |
2178 | } | |
2179 | ||
2180 | /** | |
2181 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
2182 | * @fip: The FCoE controller | |
2183 | * | |
2184 | * Called through the local port template for discovery. | |
2185 | * Called without the ctlr_mutex held. | |
2186 | */ | |
2187 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
2188 | { | |
2189 | struct fcoe_ctlr *fip = lport->disc.priv; | |
2190 | ||
2191 | mutex_lock(&fip->ctlr_mutex); | |
2192 | fcoe_ctlr_disc_stop_locked(lport); | |
2193 | mutex_unlock(&fip->ctlr_mutex); | |
2194 | } | |
2195 | ||
2196 | /** | |
2197 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
2198 | * @fip: The FCoE controller | |
2199 | * | |
2200 | * Called through the local port template for discovery. | |
2201 | * Called without the ctlr_mutex held. | |
2202 | */ | |
2203 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
2204 | { | |
2205 | fcoe_ctlr_disc_stop(lport); | |
5922a957 | 2206 | fc_rport_flush_queue(); |
e10f8c66 JE |
2207 | synchronize_rcu(); |
2208 | } | |
2209 | ||
2210 | /** | |
2211 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
2212 | * @fip: The FCoE controller | |
2213 | * | |
2214 | * Called with fcoe_ctlr lock held. | |
2215 | */ | |
2216 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
2217 | { | |
2218 | unsigned long wait; | |
2219 | u32 port_id; | |
2220 | ||
2221 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
2222 | ||
2223 | /* | |
2224 | * Get proposed port ID. | |
2225 | * If this is the first try after link up, use any previous port_id. | |
2226 | * If there was none, use the low bits of the port_name. | |
2227 | * On subsequent tries, get the next random one. | |
2228 | * Don't use reserved IDs, use another non-zero value, just as random. | |
2229 | */ | |
2230 | port_id = fip->port_id; | |
2231 | if (fip->probe_tries) | |
496f2f93 | 2232 | port_id = prandom_u32_state(&fip->rnd_state) & 0xffff; |
e10f8c66 JE |
2233 | else if (!port_id) |
2234 | port_id = fip->lp->wwpn & 0xffff; | |
2235 | if (!port_id || port_id == 0xffff) | |
2236 | port_id = 1; | |
2237 | fip->port_id = port_id; | |
2238 | ||
2239 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
2240 | fip->probe_tries++; | |
3b60a64f | 2241 | wait = prandom_u32() % FIP_VN_PROBE_WAIT; |
e10f8c66 JE |
2242 | } else |
2243 | wait = FIP_VN_RLIM_INT; | |
2244 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
2245 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
2246 | } | |
2247 | ||
2248 | /** | |
2249 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
2250 | * @fip: The FCoE controller | |
2251 | * | |
2252 | * Called with fcoe_ctlr lock held. | |
2253 | */ | |
2254 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
2255 | { | |
2256 | fip->probe_tries = 0; | |
496f2f93 | 2257 | prandom_seed_state(&fip->rnd_state, fip->lp->wwpn); |
e10f8c66 JE |
2258 | fcoe_ctlr_vn_restart(fip); |
2259 | } | |
2260 | ||
2261 | /** | |
2262 | * fcoe_ctlr_vn_parse - parse probe request or response | |
2263 | * @fip: The FCoE controller | |
2264 | * @skb: incoming packet | |
2265 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
2266 | * | |
2267 | * Returns non-zero error number on error. | |
2268 | * Does not consume the packet. | |
2269 | */ | |
2270 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
2271 | struct sk_buff *skb, | |
2272 | struct fc_rport_priv *rdata) | |
2273 | { | |
2274 | struct fip_header *fiph; | |
2275 | struct fip_desc *desc = NULL; | |
2276 | struct fip_mac_desc *macd = NULL; | |
2277 | struct fip_wwn_desc *wwn = NULL; | |
2278 | struct fip_vn_desc *vn = NULL; | |
2279 | struct fip_size_desc *size = NULL; | |
2280 | struct fcoe_rport *frport; | |
2281 | size_t rlen; | |
2282 | size_t dlen; | |
2283 | u32 desc_mask = 0; | |
2284 | u32 dtype; | |
2285 | u8 sub; | |
2286 | ||
2287 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2288 | frport = fcoe_ctlr_rport(rdata); | |
2289 | ||
2290 | fiph = (struct fip_header *)skb->data; | |
2291 | frport->flags = ntohs(fiph->fip_flags); | |
2292 | ||
2293 | sub = fiph->fip_subcode; | |
2294 | switch (sub) { | |
2295 | case FIP_SC_VN_PROBE_REQ: | |
2296 | case FIP_SC_VN_PROBE_REP: | |
2297 | case FIP_SC_VN_BEACON: | |
2298 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2299 | BIT(FIP_DT_VN_ID); | |
2300 | break; | |
2301 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2302 | case FIP_SC_VN_CLAIM_REP: | |
2303 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2304 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
2305 | BIT(FIP_DT_FCOE_SIZE); | |
2306 | break; | |
2307 | default: | |
2308 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2309 | return -EINVAL; | |
2310 | } | |
2311 | ||
2312 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2313 | if (rlen + sizeof(*fiph) > skb->len) | |
2314 | return -EINVAL; | |
2315 | ||
2316 | desc = (struct fip_desc *)(fiph + 1); | |
2317 | while (rlen > 0) { | |
2318 | dlen = desc->fip_dlen * FIP_BPW; | |
2319 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2320 | return -EINVAL; | |
2321 | ||
2322 | dtype = desc->fip_dtype; | |
2323 | if (dtype < 32) { | |
2324 | if (!(desc_mask & BIT(dtype))) { | |
2325 | LIBFCOE_FIP_DBG(fip, | |
2326 | "unexpected or duplicated desc " | |
2327 | "desc type %u in " | |
2328 | "FIP VN2VN subtype %u\n", | |
2329 | dtype, sub); | |
2330 | return -EINVAL; | |
2331 | } | |
2332 | desc_mask &= ~BIT(dtype); | |
2333 | } | |
2334 | ||
2335 | switch (dtype) { | |
2336 | case FIP_DT_MAC: | |
2337 | if (dlen != sizeof(struct fip_mac_desc)) | |
2338 | goto len_err; | |
2339 | macd = (struct fip_mac_desc *)desc; | |
2340 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2341 | LIBFCOE_FIP_DBG(fip, | |
2342 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2343 | macd->fd_mac); | |
2344 | return -EINVAL; | |
2345 | } | |
2346 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2347 | break; | |
2348 | case FIP_DT_NAME: | |
2349 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2350 | goto len_err; | |
2351 | wwn = (struct fip_wwn_desc *)desc; | |
2352 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2353 | break; | |
2354 | case FIP_DT_VN_ID: | |
2355 | if (dlen != sizeof(struct fip_vn_desc)) | |
2356 | goto len_err; | |
2357 | vn = (struct fip_vn_desc *)desc; | |
2358 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
2359 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
2360 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
2361 | break; | |
2362 | case FIP_DT_FC4F: | |
2363 | if (dlen != sizeof(struct fip_fc4_feat)) | |
2364 | goto len_err; | |
2365 | break; | |
2366 | case FIP_DT_FCOE_SIZE: | |
2367 | if (dlen != sizeof(struct fip_size_desc)) | |
2368 | goto len_err; | |
2369 | size = (struct fip_size_desc *)desc; | |
2370 | frport->fcoe_len = ntohs(size->fd_size); | |
2371 | break; | |
2372 | default: | |
2373 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2374 | "in FIP probe\n", dtype); | |
2375 | /* standard says ignore unknown descriptors >= 128 */ | |
6a551c11 | 2376 | if (dtype < FIP_DT_NON_CRITICAL) |
e10f8c66 JE |
2377 | return -EINVAL; |
2378 | break; | |
2379 | } | |
2380 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2381 | rlen -= dlen; | |
2382 | } | |
2383 | return 0; | |
2384 | ||
2385 | len_err: | |
2386 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2387 | dtype, dlen); | |
2388 | return -EINVAL; | |
2389 | } | |
2390 | ||
2391 | /** | |
2392 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
2393 | * @fip: The FCoE controller | |
2394 | * | |
2395 | * Called with ctlr_mutex held. | |
2396 | */ | |
2397 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
2398 | { | |
2399 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
2400 | fip->sol_time = jiffies; | |
2401 | } | |
2402 | ||
2403 | /** | |
2404 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
2405 | * @fip: The FCoE controller | |
2406 | * @rdata: parsed remote port with frport from the probe request | |
2407 | * | |
2408 | * Called with ctlr_mutex held. | |
2409 | */ | |
2410 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
2411 | struct fc_rport_priv *rdata) | |
2412 | { | |
2413 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2414 | ||
2415 | if (rdata->ids.port_id != fip->port_id) | |
2416 | return; | |
2417 | ||
2418 | switch (fip->state) { | |
2419 | case FIP_ST_VNMP_CLAIM: | |
2420 | case FIP_ST_VNMP_UP: | |
c9596550 HR |
2421 | LIBFCOE_FIP_DBG(fip, "vn_probe_req: send reply, state %x\n", |
2422 | fip->state); | |
e10f8c66 JE |
2423 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, |
2424 | frport->enode_mac, 0); | |
2425 | break; | |
2426 | case FIP_ST_VNMP_PROBE1: | |
2427 | case FIP_ST_VNMP_PROBE2: | |
2428 | /* | |
2429 | * Decide whether to reply to the Probe. | |
2430 | * Our selected address is never a "recorded" one, so | |
2431 | * only reply if our WWPN is greater and the | |
2432 | * Probe's REC bit is not set. | |
2433 | * If we don't reply, we will change our address. | |
2434 | */ | |
2435 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2436 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
c9596550 HR |
2437 | LIBFCOE_FIP_DBG(fip, "vn_probe_req: " |
2438 | "port_id collision\n"); | |
e10f8c66 JE |
2439 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, |
2440 | frport->enode_mac, 0); | |
2441 | break; | |
2442 | } | |
2443 | /* fall through */ | |
2444 | case FIP_ST_VNMP_START: | |
c9596550 HR |
2445 | LIBFCOE_FIP_DBG(fip, "vn_probe_req: " |
2446 | "restart VN2VN negotiation\n"); | |
e10f8c66 JE |
2447 | fcoe_ctlr_vn_restart(fip); |
2448 | break; | |
2449 | default: | |
c9596550 HR |
2450 | LIBFCOE_FIP_DBG(fip, "vn_probe_req: ignore state %x\n", |
2451 | fip->state); | |
e10f8c66 JE |
2452 | break; |
2453 | } | |
2454 | } | |
2455 | ||
2456 | /** | |
2457 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2458 | * @fip: The FCoE controller | |
2459 | * @rdata: parsed remote port with frport from the probe request | |
2460 | * | |
2461 | * Called with ctlr_mutex held. | |
2462 | */ | |
2463 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2464 | struct fc_rport_priv *rdata) | |
2465 | { | |
2466 | if (rdata->ids.port_id != fip->port_id) | |
2467 | return; | |
2468 | switch (fip->state) { | |
2469 | case FIP_ST_VNMP_START: | |
2470 | case FIP_ST_VNMP_PROBE1: | |
2471 | case FIP_ST_VNMP_PROBE2: | |
2472 | case FIP_ST_VNMP_CLAIM: | |
c9596550 HR |
2473 | LIBFCOE_FIP_DBG(fip, "vn_probe_reply: restart state %x\n", |
2474 | fip->state); | |
e10f8c66 JE |
2475 | fcoe_ctlr_vn_restart(fip); |
2476 | break; | |
2477 | case FIP_ST_VNMP_UP: | |
c9596550 | 2478 | LIBFCOE_FIP_DBG(fip, "vn_probe_reply: send claim notify\n"); |
e10f8c66 JE |
2479 | fcoe_ctlr_vn_send_claim(fip); |
2480 | break; | |
2481 | default: | |
2482 | break; | |
2483 | } | |
2484 | } | |
2485 | ||
2486 | /** | |
2487 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2488 | * @fip: The FCoE controller | |
2489 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2490 | * | |
2491 | * Called with ctlr_mutex held. | |
2492 | */ | |
2493 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2494 | { | |
2495 | struct fc_lport *lport = fip->lp; | |
2496 | struct fc_rport_priv *rdata; | |
2497 | struct fc_rport_identifiers *ids; | |
2498 | struct fcoe_rport *frport; | |
2499 | u32 port_id; | |
2500 | ||
2501 | port_id = new->ids.port_id; | |
2502 | if (port_id == fip->port_id) | |
2503 | return; | |
2504 | ||
2505 | mutex_lock(&lport->disc.disc_mutex); | |
2580064b | 2506 | rdata = fc_rport_create(lport, port_id); |
e10f8c66 JE |
2507 | if (!rdata) { |
2508 | mutex_unlock(&lport->disc.disc_mutex); | |
2509 | return; | |
2510 | } | |
a407c593 HR |
2511 | mutex_lock(&rdata->rp_mutex); |
2512 | mutex_unlock(&lport->disc.disc_mutex); | |
e10f8c66 JE |
2513 | |
2514 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2515 | rdata->disc_id = lport->disc.disc_id; | |
2516 | ||
2517 | ids = &rdata->ids; | |
2518 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
a407c593 HR |
2519 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) { |
2520 | mutex_unlock(&rdata->rp_mutex); | |
c9596550 | 2521 | LIBFCOE_FIP_DBG(fip, "vn_add rport logoff %6.6x\n", port_id); |
c96c792a | 2522 | fc_rport_logoff(rdata); |
a407c593 HR |
2523 | mutex_lock(&rdata->rp_mutex); |
2524 | } | |
e10f8c66 JE |
2525 | ids->port_name = new->ids.port_name; |
2526 | ids->node_name = new->ids.node_name; | |
a407c593 | 2527 | mutex_unlock(&rdata->rp_mutex); |
e10f8c66 JE |
2528 | |
2529 | frport = fcoe_ctlr_rport(rdata); | |
c9596550 HR |
2530 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s state %d\n", |
2531 | port_id, frport->fcoe_len ? "old" : "new", | |
2532 | rdata->rp_state); | |
e10f8c66 JE |
2533 | *frport = *fcoe_ctlr_rport(new); |
2534 | frport->time = 0; | |
2535 | } | |
2536 | ||
2537 | /** | |
2538 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2539 | * @fip: The FCoE controller | |
2540 | * @port_id: The port_id of the remote VN_node | |
2541 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2542 | * | |
2543 | * Returns non-zero error if no remote port found. | |
2544 | */ | |
2545 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2546 | { | |
2547 | struct fc_lport *lport = fip->lp; | |
2548 | struct fc_rport_priv *rdata; | |
2549 | struct fcoe_rport *frport; | |
2550 | int ret = -1; | |
2551 | ||
e87b7777 | 2552 | rdata = fc_rport_lookup(lport, port_id); |
e10f8c66 JE |
2553 | if (rdata) { |
2554 | frport = fcoe_ctlr_rport(rdata); | |
2555 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2556 | ret = 0; | |
944ef968 | 2557 | kref_put(&rdata->kref, fc_rport_destroy); |
e10f8c66 | 2558 | } |
e10f8c66 JE |
2559 | return ret; |
2560 | } | |
2561 | ||
2562 | /** | |
2563 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2564 | * @fip: The FCoE controller | |
2565 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2566 | * | |
2567 | * Called with ctlr_mutex held. | |
2568 | */ | |
2569 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2570 | struct fc_rport_priv *new) | |
2571 | { | |
2572 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2573 | ||
2574 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
c9596550 | 2575 | LIBFCOE_FIP_DBG(fip, "send probe req for P2P/REC\n"); |
e10f8c66 JE |
2576 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); |
2577 | return; | |
2578 | } | |
2579 | switch (fip->state) { | |
2580 | case FIP_ST_VNMP_START: | |
2581 | case FIP_ST_VNMP_PROBE1: | |
2582 | case FIP_ST_VNMP_PROBE2: | |
c9596550 HR |
2583 | if (new->ids.port_id == fip->port_id) { |
2584 | LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " | |
2585 | "restart, state %d\n", | |
2586 | fip->state); | |
e10f8c66 | 2587 | fcoe_ctlr_vn_restart(fip); |
c9596550 | 2588 | } |
e10f8c66 JE |
2589 | break; |
2590 | case FIP_ST_VNMP_CLAIM: | |
2591 | case FIP_ST_VNMP_UP: | |
2592 | if (new->ids.port_id == fip->port_id) { | |
2593 | if (new->ids.port_name > fip->lp->wwpn) { | |
c9596550 HR |
2594 | LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " |
2595 | "restart, port_id collision\n"); | |
e10f8c66 JE |
2596 | fcoe_ctlr_vn_restart(fip); |
2597 | break; | |
2598 | } | |
c9596550 HR |
2599 | LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " |
2600 | "send claim notify\n"); | |
e10f8c66 JE |
2601 | fcoe_ctlr_vn_send_claim(fip); |
2602 | break; | |
2603 | } | |
c9596550 HR |
2604 | LIBFCOE_FIP_DBG(fip, "vn_claim_notify: send reply to %x\n", |
2605 | new->ids.port_id); | |
e10f8c66 JE |
2606 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, |
2607 | min((u32)frport->fcoe_len, | |
2608 | fcoe_ctlr_fcoe_size(fip))); | |
2609 | fcoe_ctlr_vn_add(fip, new); | |
2610 | break; | |
2611 | default: | |
c9596550 HR |
2612 | LIBFCOE_FIP_DBG(fip, "vn_claim_notify: " |
2613 | "ignoring claim from %x\n", new->ids.port_id); | |
e10f8c66 JE |
2614 | break; |
2615 | } | |
2616 | } | |
2617 | ||
2618 | /** | |
2619 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2620 | * @fip: The FCoE controller that received the frame | |
2621 | * @new: newly-parsed remote port with frport from the Claim Response | |
2622 | * | |
2623 | * Called with ctlr_mutex held. | |
2624 | */ | |
2625 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2626 | struct fc_rport_priv *new) | |
2627 | { | |
2628 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2629 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2630 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2631 | fcoe_ctlr_vn_add(fip, new); | |
2632 | } | |
2633 | ||
2634 | /** | |
2635 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2636 | * @fip: The FCoE controller that received the frame | |
2637 | * @new: newly-parsed remote port with frport from the Beacon | |
2638 | * | |
2639 | * Called with ctlr_mutex held. | |
2640 | */ | |
2641 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2642 | struct fc_rport_priv *new) | |
2643 | { | |
2644 | struct fc_lport *lport = fip->lp; | |
2645 | struct fc_rport_priv *rdata; | |
2646 | struct fcoe_rport *frport; | |
2647 | ||
2648 | frport = fcoe_ctlr_rport(new); | |
2649 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
c9596550 | 2650 | LIBFCOE_FIP_DBG(fip, "p2p beacon while in vn2vn mode\n"); |
e10f8c66 JE |
2651 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); |
2652 | return; | |
2653 | } | |
e87b7777 | 2654 | rdata = fc_rport_lookup(lport, new->ids.port_id); |
e10f8c66 JE |
2655 | if (rdata) { |
2656 | if (rdata->ids.node_name == new->ids.node_name && | |
2657 | rdata->ids.port_name == new->ids.port_name) { | |
2658 | frport = fcoe_ctlr_rport(rdata); | |
c9596550 HR |
2659 | LIBFCOE_FIP_DBG(fip, "beacon from rport %x\n", |
2660 | rdata->ids.port_id); | |
2661 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) { | |
2662 | LIBFCOE_FIP_DBG(fip, "beacon expired " | |
2663 | "for rport %x\n", | |
2664 | rdata->ids.port_id); | |
05d7d3b0 | 2665 | fc_rport_login(rdata); |
c9596550 | 2666 | } |
e10f8c66 JE |
2667 | frport->time = jiffies; |
2668 | } | |
944ef968 | 2669 | kref_put(&rdata->kref, fc_rport_destroy); |
e10f8c66 JE |
2670 | return; |
2671 | } | |
2672 | if (fip->state != FIP_ST_VNMP_UP) | |
2673 | return; | |
2674 | ||
2675 | /* | |
2676 | * Beacon from a new neighbor. | |
2677 | * Send a claim notify if one hasn't been sent recently. | |
2678 | * Don't add the neighbor yet. | |
2679 | */ | |
2680 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2681 | new->ids.port_id); | |
2682 | if (time_after(jiffies, | |
2683 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2684 | fcoe_ctlr_vn_send_claim(fip); | |
2685 | } | |
2686 | ||
2687 | /** | |
2688 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2689 | * @fip: The FCoE controller | |
2690 | * | |
2691 | * Called with ctlr_mutex held. | |
2692 | * Called only in state FIP_ST_VNMP_UP. | |
2693 | * Returns the soonest time for next age-out or a time far in the future. | |
2694 | */ | |
2695 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2696 | { | |
2697 | struct fc_lport *lport = fip->lp; | |
2698 | struct fc_rport_priv *rdata; | |
2699 | struct fcoe_rport *frport; | |
2700 | unsigned long next_time; | |
2701 | unsigned long deadline; | |
2702 | ||
2703 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
0993ed92 | 2704 | mutex_lock(&lport->disc.disc_mutex); |
e10f8c66 | 2705 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { |
a407c593 HR |
2706 | if (!kref_get_unless_zero(&rdata->kref)) |
2707 | continue; | |
e10f8c66 | 2708 | frport = fcoe_ctlr_rport(rdata); |
a407c593 | 2709 | if (!frport->time) { |
944ef968 | 2710 | kref_put(&rdata->kref, fc_rport_destroy); |
e10f8c66 | 2711 | continue; |
a407c593 | 2712 | } |
e10f8c66 JE |
2713 | deadline = frport->time + |
2714 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2715 | if (time_after_eq(jiffies, deadline)) { | |
2716 | frport->time = 0; | |
2717 | LIBFCOE_FIP_DBG(fip, | |
2718 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2719 | rdata->ids.port_name, rdata->ids.port_id); | |
c96c792a | 2720 | fc_rport_logoff(rdata); |
e10f8c66 JE |
2721 | } else if (time_before(deadline, next_time)) |
2722 | next_time = deadline; | |
944ef968 | 2723 | kref_put(&rdata->kref, fc_rport_destroy); |
e10f8c66 | 2724 | } |
0993ed92 | 2725 | mutex_unlock(&lport->disc.disc_mutex); |
e10f8c66 JE |
2726 | return next_time; |
2727 | } | |
2728 | ||
2729 | /** | |
2730 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2731 | * @fip: The FCoE controller that received the frame | |
2732 | * @skb: The received FIP frame | |
2733 | * | |
2734 | * Returns non-zero if the frame is dropped. | |
2735 | * Always consumes the frame. | |
2736 | */ | |
2737 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2738 | { | |
2739 | struct fip_header *fiph; | |
2740 | enum fip_vn2vn_subcode sub; | |
2dc02ee5 | 2741 | struct { |
e10f8c66 JE |
2742 | struct fc_rport_priv rdata; |
2743 | struct fcoe_rport frport; | |
2744 | } buf; | |
5d5a51d2 | 2745 | int rc, vlan_id = 0; |
e10f8c66 JE |
2746 | |
2747 | fiph = (struct fip_header *)skb->data; | |
2748 | sub = fiph->fip_subcode; | |
2749 | ||
5d5a51d2 HR |
2750 | if (fip->lp->vlan) |
2751 | vlan_id = skb_vlan_tag_get_id(skb); | |
2752 | ||
2753 | if (vlan_id && vlan_id != fip->lp->vlan) { | |
2754 | LIBFCOE_FIP_DBG(fip, "vn_recv drop frame sub %x vlan %d\n", | |
2755 | sub, vlan_id); | |
2756 | rc = -EAGAIN; | |
2757 | goto drop; | |
2758 | } | |
2759 | ||
e10f8c66 JE |
2760 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); |
2761 | if (rc) { | |
2762 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2763 | goto drop; | |
2764 | } | |
2765 | ||
2766 | mutex_lock(&fip->ctlr_mutex); | |
2767 | switch (sub) { | |
2768 | case FIP_SC_VN_PROBE_REQ: | |
2769 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2770 | break; | |
2771 | case FIP_SC_VN_PROBE_REP: | |
2772 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2773 | break; | |
2774 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2775 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2776 | break; | |
2777 | case FIP_SC_VN_CLAIM_REP: | |
2778 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2779 | break; | |
2780 | case FIP_SC_VN_BEACON: | |
2781 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2782 | break; | |
2783 | default: | |
2784 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2785 | rc = -1; | |
2786 | break; | |
2787 | } | |
2788 | mutex_unlock(&fip->ctlr_mutex); | |
2789 | drop: | |
2790 | kfree_skb(skb); | |
2791 | return rc; | |
2792 | } | |
2793 | ||
9a6cf881 HR |
2794 | /** |
2795 | * fcoe_ctlr_vlan_parse - parse vlan discovery request or response | |
2796 | * @fip: The FCoE controller | |
2797 | * @skb: incoming packet | |
2798 | * @rdata: buffer for resulting parsed VLAN entry plus fcoe_rport | |
2799 | * | |
2800 | * Returns non-zero error number on error. | |
2801 | * Does not consume the packet. | |
2802 | */ | |
2803 | static int fcoe_ctlr_vlan_parse(struct fcoe_ctlr *fip, | |
2804 | struct sk_buff *skb, | |
2805 | struct fc_rport_priv *rdata) | |
2806 | { | |
2807 | struct fip_header *fiph; | |
2808 | struct fip_desc *desc = NULL; | |
2809 | struct fip_mac_desc *macd = NULL; | |
2810 | struct fip_wwn_desc *wwn = NULL; | |
2811 | struct fcoe_rport *frport; | |
2812 | size_t rlen; | |
2813 | size_t dlen; | |
2814 | u32 desc_mask = 0; | |
2815 | u32 dtype; | |
2816 | u8 sub; | |
2817 | ||
2818 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2819 | frport = fcoe_ctlr_rport(rdata); | |
2820 | ||
2821 | fiph = (struct fip_header *)skb->data; | |
2822 | frport->flags = ntohs(fiph->fip_flags); | |
2823 | ||
2824 | sub = fiph->fip_subcode; | |
2825 | switch (sub) { | |
2826 | case FIP_SC_VL_REQ: | |
2827 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME); | |
2828 | break; | |
2829 | default: | |
2830 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2831 | return -EINVAL; | |
2832 | } | |
2833 | ||
2834 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2835 | if (rlen + sizeof(*fiph) > skb->len) | |
2836 | return -EINVAL; | |
2837 | ||
2838 | desc = (struct fip_desc *)(fiph + 1); | |
2839 | while (rlen > 0) { | |
2840 | dlen = desc->fip_dlen * FIP_BPW; | |
2841 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2842 | return -EINVAL; | |
2843 | ||
2844 | dtype = desc->fip_dtype; | |
2845 | if (dtype < 32) { | |
2846 | if (!(desc_mask & BIT(dtype))) { | |
2847 | LIBFCOE_FIP_DBG(fip, | |
2848 | "unexpected or duplicated desc " | |
2849 | "desc type %u in " | |
2850 | "FIP VN2VN subtype %u\n", | |
2851 | dtype, sub); | |
2852 | return -EINVAL; | |
2853 | } | |
2854 | desc_mask &= ~BIT(dtype); | |
2855 | } | |
2856 | ||
2857 | switch (dtype) { | |
2858 | case FIP_DT_MAC: | |
2859 | if (dlen != sizeof(struct fip_mac_desc)) | |
2860 | goto len_err; | |
2861 | macd = (struct fip_mac_desc *)desc; | |
2862 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2863 | LIBFCOE_FIP_DBG(fip, | |
2864 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2865 | macd->fd_mac); | |
2866 | return -EINVAL; | |
2867 | } | |
2868 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2869 | break; | |
2870 | case FIP_DT_NAME: | |
2871 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2872 | goto len_err; | |
2873 | wwn = (struct fip_wwn_desc *)desc; | |
2874 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2875 | break; | |
2876 | default: | |
2877 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2878 | "in FIP probe\n", dtype); | |
2879 | /* standard says ignore unknown descriptors >= 128 */ | |
2880 | if (dtype < FIP_DT_NON_CRITICAL) | |
2881 | return -EINVAL; | |
2882 | break; | |
2883 | } | |
2884 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2885 | rlen -= dlen; | |
2886 | } | |
2887 | return 0; | |
2888 | ||
2889 | len_err: | |
2890 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2891 | dtype, dlen); | |
2892 | return -EINVAL; | |
2893 | } | |
2894 | ||
2895 | /** | |
2896 | * fcoe_ctlr_vlan_send() - Send a FIP VLAN Notification | |
2897 | * @fip: The FCoE controller | |
2898 | * @sub: sub-opcode for vlan notification or vn2vn vlan notification | |
2899 | * @dest: The destination Ethernet MAC address | |
2900 | * @min_len: minimum size of the Ethernet payload to be sent | |
2901 | */ | |
2902 | static void fcoe_ctlr_vlan_send(struct fcoe_ctlr *fip, | |
2903 | enum fip_vlan_subcode sub, | |
2904 | const u8 *dest) | |
2905 | { | |
2906 | struct sk_buff *skb; | |
2907 | struct fip_vlan_notify_frame { | |
2908 | struct ethhdr eth; | |
2909 | struct fip_header fip; | |
2910 | struct fip_mac_desc mac; | |
2911 | struct fip_vlan_desc vlan; | |
2912 | } __packed * frame; | |
2913 | size_t len; | |
2914 | size_t dlen; | |
2915 | ||
2916 | len = sizeof(*frame); | |
2917 | dlen = sizeof(frame->mac) + sizeof(frame->vlan); | |
2918 | len = max(len, sizeof(struct ethhdr)); | |
2919 | ||
2920 | skb = dev_alloc_skb(len); | |
2921 | if (!skb) | |
2922 | return; | |
2923 | ||
2924 | LIBFCOE_FIP_DBG(fip, "fip %s vlan notification, vlan %d\n", | |
2925 | fip->mode == FIP_MODE_VN2VN ? "vn2vn" : "fcf", | |
2926 | fip->lp->vlan); | |
2927 | ||
2928 | frame = (struct fip_vlan_notify_frame *)skb->data; | |
2929 | memset(frame, 0, len); | |
2930 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
2931 | ||
2932 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
2933 | frame->eth.h_proto = htons(ETH_P_FIP); | |
2934 | ||
2935 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
2936 | frame->fip.fip_op = htons(FIP_OP_VLAN); | |
2937 | frame->fip.fip_subcode = sub; | |
2938 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
2939 | ||
2940 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
2941 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
2942 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
2943 | ||
2944 | frame->vlan.fd_desc.fip_dtype = FIP_DT_VLAN; | |
2945 | frame->vlan.fd_desc.fip_dlen = sizeof(frame->vlan) / FIP_BPW; | |
2946 | put_unaligned_be16(fip->lp->vlan, &frame->vlan.fd_vlan); | |
2947 | ||
2948 | skb_put(skb, len); | |
2949 | skb->protocol = htons(ETH_P_FIP); | |
2950 | skb->priority = fip->priority; | |
2951 | skb_reset_mac_header(skb); | |
2952 | skb_reset_network_header(skb); | |
2953 | ||
2954 | fip->send(fip, skb); | |
2955 | } | |
2956 | ||
2957 | /** | |
2958 | * fcoe_ctlr_vlan_disk_reply() - send FIP VLAN Discovery Notification. | |
2959 | * @fip: The FCoE controller | |
2960 | * | |
2961 | * Called with ctlr_mutex held. | |
2962 | */ | |
2963 | static void fcoe_ctlr_vlan_disc_reply(struct fcoe_ctlr *fip, | |
2964 | struct fc_rport_priv *rdata) | |
2965 | { | |
2966 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2967 | enum fip_vlan_subcode sub = FIP_SC_VL_NOTE; | |
2968 | ||
2969 | if (fip->mode == FIP_MODE_VN2VN) | |
2970 | sub = FIP_SC_VL_VN2VN_NOTE; | |
2971 | ||
2972 | fcoe_ctlr_vlan_send(fip, sub, frport->enode_mac); | |
2973 | } | |
2974 | ||
2975 | /** | |
2976 | * fcoe_ctlr_vlan_recv - vlan request receive handler for VN2VN mode. | |
2977 | * @lport: The local port | |
2978 | * @fp: The received frame | |
2979 | * | |
2980 | */ | |
2981 | static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2982 | { | |
2983 | struct fip_header *fiph; | |
2984 | enum fip_vlan_subcode sub; | |
2985 | struct { | |
2986 | struct fc_rport_priv rdata; | |
2987 | struct fcoe_rport frport; | |
2988 | } buf; | |
2989 | int rc; | |
2990 | ||
2991 | fiph = (struct fip_header *)skb->data; | |
2992 | sub = fiph->fip_subcode; | |
2993 | rc = fcoe_ctlr_vlan_parse(fip, skb, &buf.rdata); | |
2994 | if (rc) { | |
2995 | LIBFCOE_FIP_DBG(fip, "vlan_recv vlan_parse error %d\n", rc); | |
2996 | goto drop; | |
2997 | } | |
2998 | mutex_lock(&fip->ctlr_mutex); | |
2999 | if (sub == FIP_SC_VL_REQ) | |
3000 | fcoe_ctlr_vlan_disc_reply(fip, &buf.rdata); | |
3001 | mutex_unlock(&fip->ctlr_mutex); | |
3002 | ||
3003 | drop: | |
ea0a95d7 | 3004 | kfree_skb(skb); |
9a6cf881 HR |
3005 | return rc; |
3006 | } | |
3007 | ||
e10f8c66 JE |
3008 | /** |
3009 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
92261156 JE |
3010 | * @lport: The local port |
3011 | * @fp: The received frame | |
e10f8c66 JE |
3012 | * |
3013 | * This should never be called since we don't see RSCNs or other | |
3014 | * fabric-generated ELSes. | |
3015 | */ | |
92261156 | 3016 | static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) |
e10f8c66 JE |
3017 | { |
3018 | struct fc_seq_els_data rjt_data; | |
3019 | ||
e10f8c66 JE |
3020 | rjt_data.reason = ELS_RJT_UNSUP; |
3021 | rjt_data.explan = ELS_EXPL_NONE; | |
7ab24dd1 | 3022 | fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
e10f8c66 JE |
3023 | fc_frame_free(fp); |
3024 | } | |
3025 | ||
3026 | /** | |
3027 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
3028 | * @fip: The FCoE controller | |
3029 | * | |
3030 | * This sets a flag indicating that remote ports should be created | |
3031 | * and started for the peers we discover. We use the disc_callback | |
3032 | * pointer as that flag. Peers already discovered are created here. | |
3033 | * | |
3034 | * The lport lock is held during this call. The callback must be done | |
3035 | * later, without holding either the lport or discovery locks. | |
3036 | * The fcoe_ctlr lock may also be held during this call. | |
3037 | */ | |
3038 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
3039 | enum fc_disc_event), | |
3040 | struct fc_lport *lport) | |
3041 | { | |
3042 | struct fc_disc *disc = &lport->disc; | |
3043 | struct fcoe_ctlr *fip = disc->priv; | |
3044 | ||
3045 | mutex_lock(&disc->disc_mutex); | |
3046 | disc->disc_callback = callback; | |
3047 | disc->disc_id = (disc->disc_id + 2) | 1; | |
3048 | disc->pending = 1; | |
3049 | schedule_work(&fip->timer_work); | |
3050 | mutex_unlock(&disc->disc_mutex); | |
3051 | } | |
3052 | ||
3053 | /** | |
3054 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
3055 | * @fip: The FCoE controller | |
3056 | * | |
3057 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
3058 | * we've received at least one beacon. | |
3059 | * Performs the discovery complete callback. | |
3060 | */ | |
3061 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
3062 | { | |
3063 | struct fc_lport *lport = fip->lp; | |
3064 | struct fc_disc *disc = &lport->disc; | |
3065 | struct fc_rport_priv *rdata; | |
3066 | struct fcoe_rport *frport; | |
3067 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
3068 | ||
3069 | mutex_lock(&disc->disc_mutex); | |
3070 | callback = disc->pending ? disc->disc_callback : NULL; | |
3071 | disc->pending = 0; | |
3072 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
a407c593 HR |
3073 | if (!kref_get_unless_zero(&rdata->kref)) |
3074 | continue; | |
e10f8c66 JE |
3075 | frport = fcoe_ctlr_rport(rdata); |
3076 | if (frport->time) | |
05d7d3b0 | 3077 | fc_rport_login(rdata); |
944ef968 | 3078 | kref_put(&rdata->kref, fc_rport_destroy); |
e10f8c66 | 3079 | } |
0993ed92 | 3080 | mutex_unlock(&disc->disc_mutex); |
e10f8c66 JE |
3081 | if (callback) |
3082 | callback(lport, DISC_EV_SUCCESS); | |
3083 | } | |
3084 | ||
3085 | /** | |
3086 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
3087 | * @fip: The FCoE controller | |
3088 | */ | |
3089 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
3090 | { | |
3091 | unsigned long next_time; | |
3092 | u8 mac[ETH_ALEN]; | |
3093 | u32 new_port_id = 0; | |
3094 | ||
3095 | mutex_lock(&fip->ctlr_mutex); | |
3096 | switch (fip->state) { | |
3097 | case FIP_ST_VNMP_START: | |
3098 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
c9596550 | 3099 | LIBFCOE_FIP_DBG(fip, "vn_timeout: send 1st probe request\n"); |
e10f8c66 JE |
3100 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); |
3101 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
3102 | break; | |
3103 | case FIP_ST_VNMP_PROBE1: | |
3104 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
c9596550 | 3105 | LIBFCOE_FIP_DBG(fip, "vn_timeout: send 2nd probe request\n"); |
e10f8c66 JE |
3106 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); |
3107 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
3108 | break; | |
3109 | case FIP_ST_VNMP_PROBE2: | |
3110 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
3111 | new_port_id = fip->port_id; | |
3112 | hton24(mac, FIP_VN_FC_MAP); | |
3113 | hton24(mac + 3, new_port_id); | |
cd229e42 | 3114 | fcoe_ctlr_map_dest(fip); |
e10f8c66 | 3115 | fip->update_mac(fip->lp, mac); |
c9596550 | 3116 | LIBFCOE_FIP_DBG(fip, "vn_timeout: send claim notify\n"); |
e10f8c66 JE |
3117 | fcoe_ctlr_vn_send_claim(fip); |
3118 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
3119 | break; | |
3120 | case FIP_ST_VNMP_CLAIM: | |
3121 | /* | |
3122 | * This may be invoked either by starting discovery so don't | |
3123 | * go to the next state unless it's been long enough. | |
3124 | */ | |
3125 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
3126 | if (time_after_eq(jiffies, next_time)) { | |
3127 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
c9596550 | 3128 | LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n"); |
e10f8c66 JE |
3129 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, |
3130 | fcoe_all_vn2vn, 0); | |
3131 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
3132 | fip->port_ka_time = next_time; | |
3133 | } | |
3134 | fcoe_ctlr_vn_disc(fip); | |
3135 | break; | |
3136 | case FIP_ST_VNMP_UP: | |
3137 | next_time = fcoe_ctlr_vn_age(fip); | |
3138 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
c9596550 | 3139 | LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n"); |
e10f8c66 JE |
3140 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, |
3141 | fcoe_all_vn2vn, 0); | |
3142 | fip->port_ka_time = jiffies + | |
3143 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
3b60a64f | 3144 | (prandom_u32() % FIP_VN_BEACON_FUZZ)); |
e10f8c66 JE |
3145 | } |
3146 | if (time_before(fip->port_ka_time, next_time)) | |
3147 | next_time = fip->port_ka_time; | |
3148 | break; | |
3149 | case FIP_ST_LINK_WAIT: | |
3150 | goto unlock; | |
3151 | default: | |
11aa9900 | 3152 | WARN(1, "unexpected state %d\n", fip->state); |
e10f8c66 JE |
3153 | goto unlock; |
3154 | } | |
3155 | mod_timer(&fip->timer, next_time); | |
3156 | unlock: | |
3157 | mutex_unlock(&fip->ctlr_mutex); | |
3158 | ||
3159 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
3160 | if (new_port_id) | |
3161 | fc_lport_set_local_id(fip->lp, new_port_id); | |
3162 | } | |
3163 | ||
0db0e377 RL |
3164 | /** |
3165 | * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode | |
3166 | * @lport: The local port to be (re)configured | |
3167 | * @fip: The FCoE controller whose mode is changing | |
3168 | * @fip_mode: The new fip mode | |
3169 | * | |
3170 | * Note that the we shouldn't be changing the libfc discovery settings | |
3171 | * (fc_disc_config) while an lport is going through the libfc state | |
3172 | * machine. The mode can only be changed when a fcoe_ctlr device is | |
3173 | * disabled, so that should ensure that this routine is only called | |
3174 | * when nothing is happening. | |
3175 | */ | |
41463a88 | 3176 | static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip, |
1917d42d | 3177 | enum fip_mode fip_mode) |
0db0e377 RL |
3178 | { |
3179 | void *priv; | |
3180 | ||
3181 | WARN_ON(lport->state != LPORT_ST_RESET && | |
3182 | lport->state != LPORT_ST_DISABLED); | |
3183 | ||
3184 | if (fip_mode == FIP_MODE_VN2VN) { | |
3185 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
3186 | lport->point_to_multipoint = 1; | |
3187 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
3188 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
3189 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
3190 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
3191 | priv = fip; | |
3192 | } else { | |
3193 | lport->rport_priv_size = 0; | |
3194 | lport->point_to_multipoint = 0; | |
3195 | lport->tt.disc_recv_req = NULL; | |
3196 | lport->tt.disc_start = NULL; | |
3197 | lport->tt.disc_stop = NULL; | |
3198 | lport->tt.disc_stop_final = NULL; | |
3199 | priv = lport; | |
3200 | } | |
3201 | ||
3202 | fc_disc_config(lport, priv); | |
3203 | } | |
3204 | ||
5e80f7f7 | 3205 | /** |
70b51aab | 3206 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
8d55e507 RL |
3207 | * @lport: The local port to configure libfc for |
3208 | * @fip: The FCoE controller in use by the local port | |
3209 | * @tt: The libfc function template | |
e10f8c66 | 3210 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
3211 | * |
3212 | * Returns : 0 for success | |
3213 | */ | |
e10f8c66 JE |
3214 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
3215 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
3216 | { |
3217 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 3218 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 3219 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 3220 | return -ENOMEM; |
70b51aab RL |
3221 | fc_exch_init(lport); |
3222 | fc_elsct_init(lport); | |
3223 | fc_lport_init(lport); | |
0807619d | 3224 | fc_disc_init(lport); |
0db0e377 | 3225 | fcoe_ctlr_mode_set(lport, fip, fip->mode); |
5e80f7f7 VD |
3226 | return 0; |
3227 | } | |
3228 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); | |
8d55e507 RL |
3229 | |
3230 | void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev) | |
3231 | { | |
3232 | struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev); | |
3233 | struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev); | |
3234 | struct fcoe_fcf *fcf; | |
3235 | ||
3236 | mutex_lock(&fip->ctlr_mutex); | |
3237 | mutex_lock(&ctlr_dev->lock); | |
3238 | ||
3239 | fcf = fcoe_fcf_device_priv(fcf_dev); | |
3240 | if (fcf) | |
3241 | fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0; | |
3242 | else | |
3243 | fcf_dev->selected = 0; | |
3244 | ||
3245 | mutex_unlock(&ctlr_dev->lock); | |
3246 | mutex_unlock(&fip->ctlr_mutex); | |
3247 | } | |
3248 | EXPORT_SYMBOL(fcoe_fcf_get_selected); | |
3249 | ||
435c8667 | 3250 | void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev) |
8d55e507 RL |
3251 | { |
3252 | struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev); | |
0db0e377 | 3253 | struct fc_lport *lport = ctlr->lp; |
8d55e507 RL |
3254 | |
3255 | mutex_lock(&ctlr->ctlr_mutex); | |
435c8667 RL |
3256 | switch (ctlr_dev->mode) { |
3257 | case FIP_CONN_TYPE_VN2VN: | |
3258 | ctlr->mode = FIP_MODE_VN2VN; | |
8d55e507 | 3259 | break; |
435c8667 | 3260 | case FIP_CONN_TYPE_FABRIC: |
8d55e507 | 3261 | default: |
435c8667 | 3262 | ctlr->mode = FIP_MODE_FABRIC; |
8d55e507 RL |
3263 | break; |
3264 | } | |
435c8667 | 3265 | |
8d55e507 | 3266 | mutex_unlock(&ctlr->ctlr_mutex); |
0db0e377 RL |
3267 | |
3268 | fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode); | |
8d55e507 | 3269 | } |
435c8667 | 3270 | EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode); |