Commit | Line | Data |
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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
35 | #include <net/rtnetlink.h> |
36 | ||
37 | #include <scsi/fc/fc_els.h> | |
38 | #include <scsi/fc/fc_fs.h> | |
39 | #include <scsi/fc/fc_fip.h> | |
40 | #include <scsi/fc/fc_encaps.h> | |
41 | #include <scsi/fc/fc_fcoe.h> | |
e10f8c66 | 42 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
43 | |
44 | #include <scsi/libfc.h> | |
97c8389d | 45 | #include <scsi/libfcoe.h> |
9b34ecff VD |
46 | |
47 | MODULE_AUTHOR("Open-FCoE.org"); | |
97c8389d | 48 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
9b34ecff | 49 | MODULE_LICENSE("GPL v2"); |
5e80f7f7 | 50 | |
97c8389d JE |
51 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
52 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
53 | ||
54 | static void fcoe_ctlr_timeout(unsigned long); | |
42913657 | 55 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d | 56 | static void fcoe_ctlr_recv_work(struct work_struct *); |
794d98e7 | 57 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); |
97c8389d | 58 | |
e10f8c66 JE |
59 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); |
60 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); | |
61 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); | |
62 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); | |
63 | ||
97c8389d | 64 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
65 | static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; |
66 | static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; | |
67 | static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; | |
97c8389d | 68 | |
650bd12b RL |
69 | unsigned int libfcoe_debug_logging; |
70 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
71 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
97c8389d | 72 | |
70b51aab | 73 | #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
650bd12b RL |
74 | #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
75 | ||
70b51aab RL |
76 | #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
77 | do { \ | |
78 | if (unlikely(libfcoe_debug_logging & LEVEL)) \ | |
79 | do { \ | |
80 | CMD; \ | |
81 | } while (0); \ | |
a69b06bc | 82 | } while (0) |
650bd12b RL |
83 | |
84 | #define LIBFCOE_DBG(fmt, args...) \ | |
85 | LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ | |
86 | printk(KERN_INFO "libfcoe: " fmt, ##args);) | |
97c8389d | 87 | |
0f51c2e5 | 88 | #define LIBFCOE_FIP_DBG(fip, fmt, args...) \ |
650bd12b | 89 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
0f51c2e5 JE |
90 | printk(KERN_INFO "host%d: fip: " fmt, \ |
91 | (fip)->lp->host->host_no, ##args);) | |
97c8389d | 92 | |
9b651da9 JE |
93 | static const char *fcoe_ctlr_states[] = { |
94 | [FIP_ST_DISABLED] = "DISABLED", | |
95 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
96 | [FIP_ST_AUTO] = "AUTO", | |
97 | [FIP_ST_NON_FIP] = "NON_FIP", | |
98 | [FIP_ST_ENABLED] = "ENABLED", | |
e10f8c66 JE |
99 | [FIP_ST_VNMP_START] = "VNMP_START", |
100 | [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", | |
101 | [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", | |
102 | [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", | |
103 | [FIP_ST_VNMP_UP] = "VNMP_UP", | |
9b651da9 JE |
104 | }; |
105 | ||
106 | static const char *fcoe_ctlr_state(enum fip_state state) | |
107 | { | |
108 | const char *cp = "unknown"; | |
109 | ||
110 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
111 | cp = fcoe_ctlr_states[state]; | |
112 | if (!cp) | |
113 | cp = "unknown"; | |
114 | return cp; | |
115 | } | |
116 | ||
117 | /** | |
118 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
119 | * @fip: The FCoE controller | |
120 | * @state: The new state | |
121 | */ | |
122 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
123 | { | |
124 | if (state == fip->state) | |
125 | return; | |
126 | if (fip->lp) | |
127 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
128 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
129 | fip->state = state; | |
130 | } | |
131 | ||
70b51aab RL |
132 | /** |
133 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
134 | * @fcf: The FCF to check | |
135 | * | |
97c8389d JE |
136 | * Return non-zero if FCF fcoe_size has been validated. |
137 | */ | |
138 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
139 | { | |
140 | return (fcf->flags & FIP_FL_SOL) != 0; | |
141 | } | |
142 | ||
70b51aab RL |
143 | /** |
144 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
145 | * @fcf: The FCF to check | |
146 | * | |
97c8389d JE |
147 | * Return non-zero if the FCF is usable. |
148 | */ | |
149 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
150 | { | |
151 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
152 | ||
153 | return (fcf->flags & flags) == flags; | |
154 | } | |
155 | ||
cd229e42 JE |
156 | /** |
157 | * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses | |
158 | * @fip: The FCoE controller | |
159 | */ | |
160 | static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) | |
161 | { | |
162 | if (fip->mode == FIP_MODE_VN2VN) | |
163 | hton24(fip->dest_addr, FIP_VN_FC_MAP); | |
164 | else | |
165 | hton24(fip->dest_addr, FIP_DEF_FC_MAP); | |
166 | hton24(fip->dest_addr + 3, 0); | |
167 | fip->map_dest = 1; | |
168 | } | |
169 | ||
97c8389d | 170 | /** |
70b51aab RL |
171 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
172 | * @fip: The FCoE controller to initialize | |
97c8389d | 173 | */ |
3d902ac0 | 174 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 175 | { |
9b651da9 | 176 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 177 | fip->mode = mode; |
97c8389d | 178 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 179 | mutex_init(&fip->ctlr_mutex); |
794d98e7 | 180 | spin_lock_init(&fip->ctlr_lock); |
97c8389d JE |
181 | fip->flogi_oxid = FC_XID_UNKNOWN; |
182 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 183 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
184 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
185 | skb_queue_head_init(&fip->fip_recv_list); | |
186 | } | |
187 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
188 | ||
189 | /** | |
70b51aab RL |
190 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
191 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
192 | * |
193 | * Called with &fcoe_ctlr lock held. | |
194 | */ | |
195 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
196 | { | |
197 | struct fcoe_fcf *fcf; | |
198 | struct fcoe_fcf *next; | |
199 | ||
200 | fip->sel_fcf = NULL; | |
201 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
202 | list_del(&fcf->list); | |
203 | kfree(fcf); | |
204 | } | |
205 | fip->fcf_count = 0; | |
206 | fip->sel_time = 0; | |
207 | } | |
208 | ||
209 | /** | |
70b51aab RL |
210 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
211 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
212 | * |
213 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
214 | * | |
215 | * The receive handler will have been deleted before this to guarantee | |
216 | * that no more recv_work will be scheduled. | |
217 | * | |
218 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
219 | * This guarantees that no further timeouts or work will be scheduled. | |
220 | */ | |
221 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
222 | { | |
a4b7cfae | 223 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 224 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 225 | |
fdb068c6 | 226 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 227 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 228 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 229 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 230 | del_timer_sync(&fip->timer); |
42913657 | 231 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
232 | } |
233 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
234 | ||
69316ee2 | 235 | /** |
794d98e7 | 236 | * fcoe_ctlr_announce() - announce new FCF selection |
69316ee2 JE |
237 | * @fip: The FCoE controller |
238 | * | |
239 | * Also sets the destination MAC for FCoE and control packets | |
794d98e7 JE |
240 | * |
241 | * Called with neither ctlr_mutex nor ctlr_lock held. | |
69316ee2 JE |
242 | */ |
243 | static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) | |
244 | { | |
794d98e7 JE |
245 | struct fcoe_fcf *sel; |
246 | struct fcoe_fcf *fcf; | |
247 | ||
248 | mutex_lock(&fip->ctlr_mutex); | |
249 | spin_lock_bh(&fip->ctlr_lock); | |
250 | ||
251 | kfree_skb(fip->flogi_req); | |
252 | fip->flogi_req = NULL; | |
253 | list_for_each_entry(fcf, &fip->fcfs, list) | |
254 | fcf->flogi_sent = 0; | |
255 | ||
256 | spin_unlock_bh(&fip->ctlr_lock); | |
257 | sel = fip->sel_fcf; | |
69316ee2 JE |
258 | |
259 | if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr)) | |
794d98e7 | 260 | goto unlock; |
69316ee2 JE |
261 | if (!is_zero_ether_addr(fip->dest_addr)) { |
262 | printk(KERN_NOTICE "libfcoe: host%d: " | |
263 | "FIP Fibre-Channel Forwarder MAC %pM deselected\n", | |
264 | fip->lp->host->host_no, fip->dest_addr); | |
265 | memset(fip->dest_addr, 0, ETH_ALEN); | |
266 | } | |
267 | if (sel) { | |
268 | printk(KERN_INFO "libfcoe: host%d: FIP selected " | |
269 | "Fibre-Channel Forwarder MAC %pM\n", | |
270 | fip->lp->host->host_no, sel->fcf_mac); | |
271 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); | |
272 | fip->map_dest = 0; | |
273 | } | |
794d98e7 JE |
274 | unlock: |
275 | mutex_unlock(&fip->ctlr_mutex); | |
69316ee2 JE |
276 | } |
277 | ||
97c8389d | 278 | /** |
70b51aab RL |
279 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
280 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
281 | * |
282 | * Returns the maximum packet size including the FCoE header and trailer, | |
283 | * but not including any Ethernet or VLAN headers. | |
284 | */ | |
285 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
286 | { | |
287 | /* | |
288 | * Determine the max FCoE frame size allowed, including | |
289 | * FCoE header and trailer. | |
290 | * Note: lp->mfs is currently the payload size, not the frame size. | |
291 | */ | |
292 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
293 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
294 | } | |
295 | ||
296 | /** | |
70b51aab RL |
297 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
298 | * @fip: The FCoE controller to send the solicitation on | |
299 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
300 | */ |
301 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
302 | { | |
303 | struct sk_buff *skb; | |
304 | struct fip_sol { | |
305 | struct ethhdr eth; | |
306 | struct fip_header fip; | |
307 | struct { | |
308 | struct fip_mac_desc mac; | |
309 | struct fip_wwn_desc wwnn; | |
310 | struct fip_size_desc size; | |
311 | } __attribute__((packed)) desc; | |
312 | } __attribute__((packed)) *sol; | |
313 | u32 fcoe_size; | |
314 | ||
315 | skb = dev_alloc_skb(sizeof(*sol)); | |
316 | if (!skb) | |
317 | return; | |
318 | ||
319 | sol = (struct fip_sol *)skb->data; | |
320 | ||
321 | memset(sol, 0, sizeof(*sol)); | |
322 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
323 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
324 | sol->eth.h_proto = htons(ETH_P_FIP); | |
325 | ||
326 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
327 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
328 | sol->fip.fip_subcode = FIP_SC_SOL; | |
329 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
330 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
331 | if (fip->spma) |
332 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
333 | |
334 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
335 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
336 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
337 | ||
338 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
339 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
340 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
341 | ||
342 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
343 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
344 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
345 | sol->desc.size.fd_size = htons(fcoe_size); | |
346 | ||
347 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 348 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
349 | skb_reset_mac_header(skb); |
350 | skb_reset_network_header(skb); | |
351 | fip->send(fip, skb); | |
352 | ||
353 | if (!fcf) | |
354 | fip->sol_time = jiffies; | |
355 | } | |
356 | ||
357 | /** | |
70b51aab RL |
358 | * fcoe_ctlr_link_up() - Start FCoE controller |
359 | * @fip: The FCoE controller to start | |
97c8389d JE |
360 | * |
361 | * Called from the LLD when the network link is ready. | |
362 | */ | |
363 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
364 | { | |
fdb068c6 | 365 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 366 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 367 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
368 | fc_linkup(fip->lp); |
369 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 370 | fcoe_ctlr_set_state(fip, fip->mode); |
e10f8c66 JE |
371 | switch (fip->mode) { |
372 | default: | |
373 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
374 | /* fall-through */ | |
375 | case FIP_MODE_AUTO: | |
0f51c2e5 | 376 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
377 | /* fall-through */ |
378 | case FIP_MODE_FABRIC: | |
379 | case FIP_MODE_NON_FIP: | |
380 | mutex_unlock(&fip->ctlr_mutex); | |
381 | fc_linkup(fip->lp); | |
382 | fcoe_ctlr_solicit(fip, NULL); | |
383 | break; | |
384 | case FIP_MODE_VN2VN: | |
385 | fcoe_ctlr_vn_start(fip); | |
386 | mutex_unlock(&fip->ctlr_mutex); | |
387 | fc_linkup(fip->lp); | |
388 | break; | |
389 | } | |
97c8389d | 390 | } else |
fdb068c6 | 391 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
392 | } |
393 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
394 | ||
395 | /** | |
70b51aab RL |
396 | * fcoe_ctlr_reset() - Reset a FCoE controller |
397 | * @fip: The FCoE controller to reset | |
97c8389d | 398 | */ |
dd42dac4 | 399 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 400 | { |
97c8389d JE |
401 | fcoe_ctlr_reset_fcfs(fip); |
402 | del_timer(&fip->timer); | |
97c8389d JE |
403 | fip->ctlr_ka_time = 0; |
404 | fip->port_ka_time = 0; | |
405 | fip->sol_time = 0; | |
406 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
cd229e42 | 407 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
408 | } |
409 | ||
410 | /** | |
70b51aab RL |
411 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
412 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
413 | * |
414 | * Returns non-zero if the link was up and now isn't. | |
415 | * | |
416 | * Called from the LLD when the network link is not ready. | |
417 | * There may be multiple calls while the link is down. | |
418 | */ | |
419 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
420 | { | |
dd42dac4 JE |
421 | int link_dropped; |
422 | ||
423 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 424 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 425 | fcoe_ctlr_reset(fip); |
42913657 | 426 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 427 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 428 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
429 | |
430 | if (link_dropped) | |
431 | fc_linkdown(fip->lp); | |
432 | return link_dropped; | |
97c8389d JE |
433 | } |
434 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
435 | ||
436 | /** | |
70b51aab RL |
437 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
438 | * @fip: The FCoE controller to send the FKA on | |
439 | * @lport: libfc fc_lport to send from | |
440 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
441 | * @sa: The source MAC address | |
97c8389d JE |
442 | * |
443 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
444 | * The source MAC is the native MAC address. | |
445 | * | |
446 | * A port keep-alive is sent every 90 seconds while logged in. | |
447 | * The source MAC is the assigned mapped source address. | |
448 | * The destination is the FCF's F-port. | |
449 | */ | |
11b56188 CL |
450 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
451 | struct fc_lport *lport, | |
452 | int ports, u8 *sa) | |
97c8389d JE |
453 | { |
454 | struct sk_buff *skb; | |
455 | struct fip_kal { | |
456 | struct ethhdr eth; | |
457 | struct fip_header fip; | |
458 | struct fip_mac_desc mac; | |
459 | } __attribute__((packed)) *kal; | |
460 | struct fip_vn_desc *vn; | |
461 | u32 len; | |
462 | struct fc_lport *lp; | |
463 | struct fcoe_fcf *fcf; | |
464 | ||
465 | fcf = fip->sel_fcf; | |
466 | lp = fip->lp; | |
281ae642 | 467 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
468 | return; |
469 | ||
be276cbe | 470 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
471 | skb = dev_alloc_skb(len); |
472 | if (!skb) | |
473 | return; | |
474 | ||
475 | kal = (struct fip_kal *)skb->data; | |
476 | memset(kal, 0, len); | |
477 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
478 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
479 | kal->eth.h_proto = htons(ETH_P_FIP); | |
480 | ||
481 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
482 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
483 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
484 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 485 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 486 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
487 | if (fip->spma) |
488 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
489 | |
490 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
491 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
492 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
493 | if (ports) { |
494 | vn = (struct fip_vn_desc *)(kal + 1); | |
495 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
496 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 497 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
498 | hton24(vn->fd_fc_id, lport->port_id); |
499 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 500 | } |
97c8389d | 501 | skb_put(skb, len); |
0f491539 | 502 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
503 | skb_reset_mac_header(skb); |
504 | skb_reset_network_header(skb); | |
505 | fip->send(fip, skb); | |
506 | } | |
507 | ||
508 | /** | |
70b51aab RL |
509 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
510 | * @fip: The FCoE controller for the ELS frame | |
511 | * @dtype: The FIP descriptor type for the frame | |
512 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 513 | * @d_id: The destination port ID. |
97c8389d JE |
514 | * |
515 | * Returns non-zero error code on failure. | |
516 | * | |
517 | * The caller must check that the length is a multiple of 4. | |
518 | * | |
519 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
520 | * Headroom includes the FIP encapsulation description, FIP header, and | |
521 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
522 | */ | |
11b56188 | 523 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 524 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
525 | { |
526 | struct fip_encaps_head { | |
527 | struct ethhdr eth; | |
528 | struct fip_header fip; | |
529 | struct fip_encaps encaps; | |
530 | } __attribute__((packed)) *cap; | |
5554345b | 531 | struct fc_frame_header *fh; |
97c8389d JE |
532 | struct fip_mac_desc *mac; |
533 | struct fcoe_fcf *fcf; | |
534 | size_t dlen; | |
5a84baea | 535 | u16 fip_flags; |
5554345b | 536 | u8 op; |
97c8389d | 537 | |
5554345b JE |
538 | fh = (struct fc_frame_header *)skb->data; |
539 | op = *(u8 *)(fh + 1); | |
97c8389d JE |
540 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
541 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
97c8389d | 542 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
543 | |
544 | if (lport->point_to_multipoint) { | |
545 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
546 | return -ENODEV; | |
5554345b | 547 | fip_flags = 0; |
e10f8c66 JE |
548 | } else { |
549 | fcf = fip->sel_fcf; | |
550 | if (!fcf) | |
551 | return -ENODEV; | |
552 | fip_flags = fcf->flags; | |
553 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
554 | FIP_FL_FPMA; | |
555 | if (!fip_flags) | |
556 | return -ENODEV; | |
557 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
558 | } | |
97c8389d JE |
559 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
560 | cap->eth.h_proto = htons(ETH_P_FIP); | |
561 | ||
562 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
563 | cap->fip.fip_op = htons(FIP_OP_LS); | |
5554345b JE |
564 | if (op == ELS_LS_ACC || op == ELS_LS_RJT) |
565 | cap->fip.fip_subcode = FIP_SC_REP; | |
566 | else | |
567 | cap->fip.fip_subcode = FIP_SC_REQ; | |
5a84baea | 568 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
569 | |
570 | cap->encaps.fd_desc.fip_dtype = dtype; | |
571 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
572 | ||
5554345b JE |
573 | if (op != ELS_LS_RJT) { |
574 | dlen += sizeof(*mac); | |
575 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
576 | memset(mac, 0, sizeof(*mac)); | |
577 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
578 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
579 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { | |
580 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); | |
581 | } else if (fip->mode == FIP_MODE_VN2VN) { | |
582 | hton24(mac->fd_mac, FIP_VN_FC_MAP); | |
583 | hton24(mac->fd_mac + 3, fip->port_id); | |
584 | } else if (fip_flags & FIP_FL_SPMA) { | |
585 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
586 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
587 | } else { | |
588 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
589 | /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ | |
590 | } | |
593abc07 | 591 | } |
5554345b | 592 | cap->fip.fip_dl_len = htons(dlen / FIP_BPW); |
97c8389d | 593 | |
0f491539 | 594 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
595 | skb_reset_mac_header(skb); |
596 | skb_reset_network_header(skb); | |
597 | return 0; | |
598 | } | |
599 | ||
600 | /** | |
601 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
602 | * @fip: FCoE controller. | |
11b56188 | 603 | * @lport: libfc fc_lport to send from |
97c8389d JE |
604 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
605 | * | |
606 | * Returns a non-zero error code if the frame should not be sent. | |
607 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
608 | * | |
609 | * The caller must check that the length is a multiple of 4. | |
610 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 611 | * The the skb must also be an fc_frame. |
794d98e7 JE |
612 | * |
613 | * This is called from the lower-level driver with spinlocks held, | |
614 | * so we must not take a mutex here. | |
97c8389d | 615 | */ |
11b56188 CL |
616 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
617 | struct sk_buff *skb) | |
97c8389d | 618 | { |
e10f8c66 | 619 | struct fc_frame *fp; |
97c8389d JE |
620 | struct fc_frame_header *fh; |
621 | u16 old_xid; | |
622 | u8 op; | |
11b56188 | 623 | u8 mac[ETH_ALEN]; |
97c8389d | 624 | |
e10f8c66 | 625 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
626 | fh = (struct fc_frame_header *)skb->data; |
627 | op = *(u8 *)(fh + 1); | |
628 | ||
e10f8c66 | 629 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
630 | old_xid = fip->flogi_oxid; |
631 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
632 | if (fip->state == FIP_ST_AUTO) { | |
633 | if (old_xid == FC_XID_UNKNOWN) | |
634 | fip->flogi_count = 0; | |
635 | fip->flogi_count++; | |
636 | if (fip->flogi_count < 3) | |
637 | goto drop; | |
cd229e42 | 638 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
639 | return 0; |
640 | } | |
5f48f70e | 641 | if (fip->state == FIP_ST_NON_FIP) |
cd229e42 | 642 | fcoe_ctlr_map_dest(fip); |
5f48f70e JE |
643 | } |
644 | ||
645 | if (fip->state == FIP_ST_NON_FIP) | |
646 | return 0; | |
e10f8c66 | 647 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 648 | goto drop; |
5f48f70e JE |
649 | switch (op) { |
650 | case ELS_FLOGI: | |
97c8389d | 651 | op = FIP_DT_FLOGI; |
794d98e7 JE |
652 | if (fip->mode == FIP_MODE_VN2VN) |
653 | break; | |
654 | spin_lock_bh(&fip->ctlr_lock); | |
655 | kfree_skb(fip->flogi_req); | |
656 | fip->flogi_req = skb; | |
657 | fip->flogi_req_send = 1; | |
658 | spin_unlock_bh(&fip->ctlr_lock); | |
659 | schedule_work(&fip->timer_work); | |
660 | return -EINPROGRESS; | |
97c8389d JE |
661 | case ELS_FDISC: |
662 | if (ntoh24(fh->fh_s_id)) | |
663 | return 0; | |
664 | op = FIP_DT_FDISC; | |
665 | break; | |
666 | case ELS_LOGO: | |
e10f8c66 JE |
667 | if (fip->mode == FIP_MODE_VN2VN) { |
668 | if (fip->state != FIP_ST_VNMP_UP) | |
669 | return -EINVAL; | |
670 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) | |
671 | return -EINVAL; | |
672 | } else { | |
673 | if (fip->state != FIP_ST_ENABLED) | |
674 | return 0; | |
675 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
676 | return 0; | |
677 | } | |
97c8389d JE |
678 | op = FIP_DT_LOGO; |
679 | break; | |
680 | case ELS_LS_ACC: | |
97c8389d | 681 | /* |
e10f8c66 | 682 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
683 | * from a point-to-point connection. Switch to using |
684 | * the source mac based on the SID. The destination | |
685 | * MAC in this case would have been set by receving the | |
686 | * FLOGI. | |
687 | */ | |
e10f8c66 JE |
688 | if (fip->state == FIP_ST_NON_FIP) { |
689 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
690 | return 0; | |
691 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
692 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
693 | fip->update_mac(lport, mac); | |
694 | } | |
695 | /* fall through */ | |
696 | case ELS_LS_RJT: | |
697 | op = fr_encaps(fp); | |
698 | if (op) | |
699 | break; | |
97c8389d JE |
700 | return 0; |
701 | default: | |
e10f8c66 JE |
702 | if (fip->state != FIP_ST_ENABLED && |
703 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
704 | goto drop; |
705 | return 0; | |
706 | } | |
e10f8c66 JE |
707 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
708 | op, ntoh24(fh->fh_d_id)); | |
709 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
710 | goto drop; |
711 | fip->send(fip, skb); | |
712 | return -EINPROGRESS; | |
713 | drop: | |
714 | kfree_skb(skb); | |
715 | return -EINVAL; | |
716 | } | |
717 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
718 | ||
70b51aab RL |
719 | /** |
720 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
721 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 722 | * |
f018b73a | 723 | * Called with lock held and preemption disabled. |
97c8389d | 724 | * |
8690cb83 JE |
725 | * An FCF is considered old if we have missed two advertisements. |
726 | * That is, there have been no valid advertisement from it for 2.5 | |
727 | * times its keep-alive period. | |
97c8389d JE |
728 | * |
729 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
730 | * |
731 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
732 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
733 | * |
734 | * Returns the time in jiffies for the next call. | |
97c8389d | 735 | */ |
8690cb83 | 736 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
737 | { |
738 | struct fcoe_fcf *fcf; | |
739 | struct fcoe_fcf *next; | |
8690cb83 JE |
740 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
741 | unsigned long deadline; | |
97c8389d | 742 | unsigned long sel_time = 0; |
f018b73a | 743 | struct fcoe_dev_stats *stats; |
97c8389d | 744 | |
fdb068c6 JE |
745 | stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); |
746 | ||
97c8389d | 747 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
748 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
749 | if (fip->sel_fcf == fcf) { | |
750 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
751 | stats->MissDiscAdvCount++; |
752 | printk(KERN_INFO "libfcoe: host%d: " | |
753 | "Missing Discovery Advertisement " | |
754 | "for fab %16.16llx count %lld\n", | |
755 | fip->lp->host->host_no, fcf->fabric_name, | |
756 | stats->MissDiscAdvCount); | |
757 | } else if (time_after(next_timer, deadline)) | |
758 | next_timer = deadline; | |
f3da80e7 | 759 | } |
8690cb83 JE |
760 | |
761 | deadline += fcf->fka_period; | |
d99ee45b | 762 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
763 | if (fip->sel_fcf == fcf) |
764 | fip->sel_fcf = NULL; | |
765 | list_del(&fcf->list); | |
766 | WARN_ON(!fip->fcf_count); | |
767 | fip->fcf_count--; | |
768 | kfree(fcf); | |
f018b73a | 769 | stats->VLinkFailureCount++; |
8690cb83 JE |
770 | } else { |
771 | if (time_after(next_timer, deadline)) | |
772 | next_timer = deadline; | |
773 | if (fcoe_ctlr_mtu_valid(fcf) && | |
774 | (!sel_time || time_before(sel_time, fcf->time))) | |
775 | sel_time = fcf->time; | |
97c8389d JE |
776 | } |
777 | } | |
fdb068c6 | 778 | put_cpu(); |
d99ee45b | 779 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
780 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
781 | fip->sel_time = sel_time; | |
97c8389d | 782 | } |
d99ee45b | 783 | |
8690cb83 | 784 | return next_timer; |
97c8389d JE |
785 | } |
786 | ||
787 | /** | |
70b51aab | 788 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 789 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
790 | * @skb: The received FIP advertisement frame |
791 | * @fcf: The resulting FCF entry | |
97c8389d JE |
792 | * |
793 | * Returns zero on a valid parsed advertisement, | |
794 | * otherwise returns non zero value. | |
795 | */ | |
0f51c2e5 JE |
796 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
797 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
798 | { |
799 | struct fip_header *fiph; | |
800 | struct fip_desc *desc = NULL; | |
801 | struct fip_wwn_desc *wwn; | |
802 | struct fip_fab_desc *fab; | |
803 | struct fip_fka_desc *fka; | |
804 | unsigned long t; | |
805 | size_t rlen; | |
806 | size_t dlen; | |
0a9c5d34 | 807 | u32 desc_mask; |
97c8389d JE |
808 | |
809 | memset(fcf, 0, sizeof(*fcf)); | |
810 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
811 | ||
812 | fiph = (struct fip_header *)skb->data; | |
813 | fcf->flags = ntohs(fiph->fip_flags); | |
814 | ||
0a9c5d34 BPG |
815 | /* |
816 | * mask of required descriptors. validating each one clears its bit. | |
817 | */ | |
818 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
819 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
820 | ||
97c8389d JE |
821 | rlen = ntohs(fiph->fip_dl_len) * 4; |
822 | if (rlen + sizeof(*fiph) > skb->len) | |
823 | return -EINVAL; | |
824 | ||
825 | desc = (struct fip_desc *)(fiph + 1); | |
826 | while (rlen > 0) { | |
827 | dlen = desc->fip_dlen * FIP_BPW; | |
828 | if (dlen < sizeof(*desc) || dlen > rlen) | |
829 | return -EINVAL; | |
0a9c5d34 BPG |
830 | /* Drop Adv if there are duplicate critical descriptors */ |
831 | if ((desc->fip_dtype < 32) && | |
832 | !(desc_mask & 1U << desc->fip_dtype)) { | |
833 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
834 | "Descriptors in FIP adv\n"); | |
835 | return -EINVAL; | |
836 | } | |
97c8389d JE |
837 | switch (desc->fip_dtype) { |
838 | case FIP_DT_PRI: | |
839 | if (dlen != sizeof(struct fip_pri_desc)) | |
840 | goto len_err; | |
841 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 842 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
843 | break; |
844 | case FIP_DT_MAC: | |
845 | if (dlen != sizeof(struct fip_mac_desc)) | |
846 | goto len_err; | |
847 | memcpy(fcf->fcf_mac, | |
848 | ((struct fip_mac_desc *)desc)->fd_mac, | |
849 | ETH_ALEN); | |
850 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
e10f8c66 JE |
851 | LIBFCOE_FIP_DBG(fip, |
852 | "Invalid MAC addr %pM in FIP adv\n", | |
853 | fcf->fcf_mac); | |
97c8389d JE |
854 | return -EINVAL; |
855 | } | |
0a9c5d34 | 856 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
857 | break; |
858 | case FIP_DT_NAME: | |
859 | if (dlen != sizeof(struct fip_wwn_desc)) | |
860 | goto len_err; | |
861 | wwn = (struct fip_wwn_desc *)desc; | |
862 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 863 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
864 | break; |
865 | case FIP_DT_FAB: | |
866 | if (dlen != sizeof(struct fip_fab_desc)) | |
867 | goto len_err; | |
868 | fab = (struct fip_fab_desc *)desc; | |
869 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
870 | fcf->vfid = ntohs(fab->fd_vfid); | |
871 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 872 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
873 | break; |
874 | case FIP_DT_FKA: | |
875 | if (dlen != sizeof(struct fip_fka_desc)) | |
876 | goto len_err; | |
877 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
878 | if (fka->fd_flags & FIP_FKA_ADV_D) |
879 | fcf->fd_flags = 1; | |
97c8389d JE |
880 | t = ntohl(fka->fd_fka_period); |
881 | if (t >= FCOE_CTLR_MIN_FKA) | |
882 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 883 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
884 | break; |
885 | case FIP_DT_MAP_OUI: | |
886 | case FIP_DT_FCOE_SIZE: | |
887 | case FIP_DT_FLOGI: | |
888 | case FIP_DT_FDISC: | |
889 | case FIP_DT_LOGO: | |
890 | case FIP_DT_ELP: | |
891 | default: | |
0f51c2e5 | 892 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 893 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
894 | /* standard says ignore unknown descriptors >= 128 */ |
895 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
896 | return -EINVAL; | |
1508f3ec | 897 | break; |
97c8389d JE |
898 | } |
899 | desc = (struct fip_desc *)((char *)desc + dlen); | |
900 | rlen -= dlen; | |
901 | } | |
902 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
903 | return -EINVAL; | |
240778e8 | 904 | if (!fcf->switch_name) |
97c8389d | 905 | return -EINVAL; |
0a9c5d34 BPG |
906 | if (desc_mask) { |
907 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
908 | desc_mask); | |
909 | return -EINVAL; | |
910 | } | |
97c8389d JE |
911 | return 0; |
912 | ||
913 | len_err: | |
0f51c2e5 | 914 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 915 | desc->fip_dtype, dlen); |
97c8389d JE |
916 | return -EINVAL; |
917 | } | |
918 | ||
919 | /** | |
70b51aab RL |
920 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
921 | * @fip: The FCoE controller receiving the advertisement | |
922 | * @skb: The received FIP packet | |
97c8389d JE |
923 | */ |
924 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
925 | { | |
926 | struct fcoe_fcf *fcf; | |
927 | struct fcoe_fcf new; | |
928 | struct fcoe_fcf *found; | |
929 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
930 | int first = 0; | |
931 | int mtu_valid; | |
932 | ||
0f51c2e5 | 933 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
934 | return; |
935 | ||
fdb068c6 | 936 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
937 | first = list_empty(&fip->fcfs); |
938 | found = NULL; | |
939 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
940 | if (fcf->switch_name == new.switch_name && | |
941 | fcf->fabric_name == new.fabric_name && | |
942 | fcf->fc_map == new.fc_map && | |
943 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
944 | found = fcf; | |
945 | break; | |
946 | } | |
947 | } | |
948 | if (!found) { | |
949 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
950 | goto out; | |
951 | ||
952 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
953 | if (!fcf) | |
954 | goto out; | |
955 | ||
956 | fip->fcf_count++; | |
957 | memcpy(fcf, &new, sizeof(new)); | |
958 | list_add(&fcf->list, &fip->fcfs); | |
959 | } else { | |
960 | /* | |
c600fea2 JE |
961 | * Update the FCF's keep-alive descriptor flags. |
962 | * Other flag changes from new advertisements are | |
963 | * ignored after a solicited advertisement is | |
964 | * received and the FCF is selectable (usable). | |
97c8389d | 965 | */ |
c600fea2 JE |
966 | fcf->fd_flags = new.fd_flags; |
967 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
968 | fcf->flags = new.flags; | |
969 | ||
d99ee45b | 970 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
971 | fip->ctlr_ka_time -= fcf->fka_period; |
972 | fip->ctlr_ka_time += new.fka_period; | |
973 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
974 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 975 | } |
97c8389d JE |
976 | fcf->fka_period = new.fka_period; |
977 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
978 | } | |
979 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
980 | fcf->time = jiffies; | |
9069f5c4 JE |
981 | if (!found) |
982 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
983 | fcf->fabric_name, fcf->fcf_mac); | |
97c8389d JE |
984 | |
985 | /* | |
986 | * If this advertisement is not solicited and our max receive size | |
987 | * hasn't been verified, send a solicited advertisement. | |
988 | */ | |
989 | if (!mtu_valid) | |
990 | fcoe_ctlr_solicit(fip, fcf); | |
991 | ||
992 | /* | |
993 | * If its been a while since we did a solicit, and this is | |
994 | * the first advertisement we've received, do a multicast | |
995 | * solicitation to gather as many advertisements as we can | |
996 | * before selection occurs. | |
997 | */ | |
998 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
999 | fcoe_ctlr_solicit(fip, NULL); | |
1000 | ||
981c1154 JE |
1001 | /* |
1002 | * Put this FCF at the head of the list for priority among equals. | |
1003 | * This helps in the case of an NPV switch which insists we use | |
1004 | * the FCF that answers multicast solicitations, not the others that | |
1005 | * are sending periodic multicast advertisements. | |
1006 | */ | |
1007 | if (mtu_valid) { | |
1008 | list_del(&fcf->list); | |
1009 | list_add(&fcf->list, &fip->fcfs); | |
1010 | } | |
1011 | ||
97c8389d JE |
1012 | /* |
1013 | * If this is the first validated FCF, note the time and | |
1014 | * set a timer to trigger selection. | |
1015 | */ | |
d99ee45b | 1016 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 1017 | fip->sel_time = jiffies + |
70b51aab | 1018 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1019 | if (!timer_pending(&fip->timer) || |
1020 | time_before(fip->sel_time, fip->timer.expires)) | |
1021 | mod_timer(&fip->timer, fip->sel_time); | |
1022 | } | |
1023 | out: | |
fdb068c6 | 1024 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1025 | } |
1026 | ||
1027 | /** | |
70b51aab RL |
1028 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
1029 | * @fip: The FCoE controller which received the packet | |
1030 | * @skb: The received FIP packet | |
97c8389d JE |
1031 | */ |
1032 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1033 | { | |
70b51aab | 1034 | struct fc_lport *lport = fip->lp; |
97c8389d | 1035 | struct fip_header *fiph; |
11b56188 | 1036 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
1037 | struct fc_frame_header *fh = NULL; |
1038 | struct fip_desc *desc; | |
1039 | struct fip_encaps *els; | |
1040 | struct fcoe_dev_stats *stats; | |
1041 | enum fip_desc_type els_dtype = 0; | |
1042 | u8 els_op; | |
1043 | u8 sub; | |
1044 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
1045 | size_t els_len = 0; | |
1046 | size_t rlen; | |
1047 | size_t dlen; | |
be61331d BPG |
1048 | u32 desc_mask = 0; |
1049 | u32 desc_cnt = 0; | |
97c8389d JE |
1050 | |
1051 | fiph = (struct fip_header *)skb->data; | |
1052 | sub = fiph->fip_subcode; | |
1053 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
1054 | goto drop; | |
1055 | ||
1056 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1057 | if (rlen + sizeof(*fiph) > skb->len) | |
1058 | goto drop; | |
1059 | ||
1060 | desc = (struct fip_desc *)(fiph + 1); | |
1061 | while (rlen > 0) { | |
be61331d | 1062 | desc_cnt++; |
97c8389d JE |
1063 | dlen = desc->fip_dlen * FIP_BPW; |
1064 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1065 | goto drop; | |
0a9c5d34 BPG |
1066 | /* Drop ELS if there are duplicate critical descriptors */ |
1067 | if (desc->fip_dtype < 32) { | |
be61331d | 1068 | if (desc_mask & 1U << desc->fip_dtype) { |
0a9c5d34 BPG |
1069 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
1070 | "Descriptors in FIP ELS\n"); | |
1071 | goto drop; | |
1072 | } | |
be61331d | 1073 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 1074 | } |
97c8389d JE |
1075 | switch (desc->fip_dtype) { |
1076 | case FIP_DT_MAC: | |
be61331d BPG |
1077 | if (desc_cnt == 1) { |
1078 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1079 | "received out of order\n"); | |
1080 | goto drop; | |
1081 | } | |
1082 | ||
97c8389d JE |
1083 | if (dlen != sizeof(struct fip_mac_desc)) |
1084 | goto len_err; | |
1085 | memcpy(granted_mac, | |
1086 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1087 | ETH_ALEN); | |
97c8389d JE |
1088 | break; |
1089 | case FIP_DT_FLOGI: | |
1090 | case FIP_DT_FDISC: | |
1091 | case FIP_DT_LOGO: | |
1092 | case FIP_DT_ELP: | |
be61331d BPG |
1093 | if (desc_cnt != 1) { |
1094 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1095 | "received out of order\n"); | |
1096 | goto drop; | |
1097 | } | |
97c8389d JE |
1098 | if (fh) |
1099 | goto drop; | |
1100 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1101 | goto len_err; | |
1102 | els_len = dlen - sizeof(*els); | |
1103 | els = (struct fip_encaps *)desc; | |
1104 | fh = (struct fc_frame_header *)(els + 1); | |
1105 | els_dtype = desc->fip_dtype; | |
1106 | break; | |
1107 | default: | |
0f51c2e5 | 1108 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1109 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
1110 | /* standard says ignore unknown descriptors >= 128 */ |
1111 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1112 | goto drop; | |
be61331d BPG |
1113 | if (desc_cnt <= 2) { |
1114 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1115 | "received out of order\n"); | |
1116 | goto drop; | |
1117 | } | |
1508f3ec | 1118 | break; |
97c8389d JE |
1119 | } |
1120 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1121 | rlen -= dlen; | |
1122 | } | |
1123 | ||
1124 | if (!fh) | |
1125 | goto drop; | |
1126 | els_op = *(u8 *)(fh + 1); | |
1127 | ||
e10f8c66 | 1128 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
794d98e7 JE |
1129 | sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { |
1130 | if (els_op == ELS_LS_ACC) { | |
1131 | if (!is_valid_ether_addr(granted_mac)) { | |
1132 | LIBFCOE_FIP_DBG(fip, | |
1133 | "Invalid MAC address %pM in FIP ELS\n", | |
1134 | granted_mac); | |
1135 | goto drop; | |
1136 | } | |
1137 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
e10f8c66 | 1138 | |
794d98e7 JE |
1139 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
1140 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1141 | if (els_dtype == FIP_DT_FLOGI) | |
1142 | fcoe_ctlr_announce(fip); | |
1143 | } | |
1144 | } else if (els_dtype == FIP_DT_FLOGI && | |
1145 | !fcoe_ctlr_flogi_retry(fip)) | |
1146 | goto drop; /* retrying FLOGI so drop reject */ | |
e10f8c66 | 1147 | } |
97c8389d | 1148 | |
be61331d BPG |
1149 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1150 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1151 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1152 | "in FIP ELS\n"); | |
1153 | goto drop; | |
1154 | } | |
1155 | ||
97c8389d JE |
1156 | /* |
1157 | * Convert skb into an fc_frame containing only the ELS. | |
1158 | */ | |
1159 | skb_pull(skb, (u8 *)fh - skb->data); | |
1160 | skb_trim(skb, els_len); | |
1161 | fp = (struct fc_frame *)skb; | |
1162 | fc_frame_init(fp); | |
1163 | fr_sof(fp) = FC_SOF_I3; | |
1164 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1165 | fr_dev(fp) = lport; |
e10f8c66 | 1166 | fr_encaps(fp) = els_dtype; |
97c8389d | 1167 | |
f018b73a | 1168 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d JE |
1169 | stats->RxFrames++; |
1170 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1171 | put_cpu(); |
97c8389d | 1172 | |
70b51aab | 1173 | fc_exch_recv(lport, fp); |
97c8389d JE |
1174 | return; |
1175 | ||
1176 | len_err: | |
0f51c2e5 | 1177 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1178 | desc->fip_dtype, dlen); |
97c8389d JE |
1179 | drop: |
1180 | kfree_skb(skb); | |
1181 | } | |
1182 | ||
1183 | /** | |
70b51aab RL |
1184 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1185 | * @fip: The FCoE controller that received the frame | |
1186 | * @fh: The received FIP header | |
97c8389d JE |
1187 | * |
1188 | * There may be multiple VN_Port descriptors. | |
1189 | * The overall length has already been checked. | |
1190 | */ | |
1191 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1192 | struct fip_header *fh) |
97c8389d JE |
1193 | { |
1194 | struct fip_desc *desc; | |
1195 | struct fip_mac_desc *mp; | |
1196 | struct fip_wwn_desc *wp; | |
1197 | struct fip_vn_desc *vp; | |
1198 | size_t rlen; | |
1199 | size_t dlen; | |
1200 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1201 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1202 | struct fc_lport *vn_port = NULL; |
1203 | u32 desc_mask; | |
1204 | int is_vn_port = 0; | |
97c8389d | 1205 | |
0f51c2e5 | 1206 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1207 | |
7b2787ec | 1208 | if (!fcf || !lport->port_id) |
97c8389d JE |
1209 | return; |
1210 | ||
1211 | /* | |
1212 | * mask of required descriptors. Validating each one clears its bit. | |
1213 | */ | |
1214 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
1215 | ||
1216 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1217 | desc = (struct fip_desc *)(fh + 1); | |
1218 | while (rlen >= sizeof(*desc)) { | |
1219 | dlen = desc->fip_dlen * FIP_BPW; | |
1220 | if (dlen > rlen) | |
1221 | return; | |
0a9c5d34 BPG |
1222 | /* Drop CVL if there are duplicate critical descriptors */ |
1223 | if ((desc->fip_dtype < 32) && | |
1224 | !(desc_mask & 1U << desc->fip_dtype)) { | |
1225 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1226 | "Descriptors in FIP CVL\n"); | |
1227 | return; | |
1228 | } | |
97c8389d JE |
1229 | switch (desc->fip_dtype) { |
1230 | case FIP_DT_MAC: | |
1231 | mp = (struct fip_mac_desc *)desc; | |
1232 | if (dlen < sizeof(*mp)) | |
1233 | return; | |
1234 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
1235 | return; | |
1236 | desc_mask &= ~BIT(FIP_DT_MAC); | |
1237 | break; | |
1238 | case FIP_DT_NAME: | |
1239 | wp = (struct fip_wwn_desc *)desc; | |
1240 | if (dlen < sizeof(*wp)) | |
1241 | return; | |
1242 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
1243 | return; | |
1244 | desc_mask &= ~BIT(FIP_DT_NAME); | |
1245 | break; | |
1246 | case FIP_DT_VN_ID: | |
1247 | vp = (struct fip_vn_desc *)desc; | |
1248 | if (dlen < sizeof(*vp)) | |
1249 | return; | |
1250 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
1251 | fip->get_src_addr(lport)) == 0 && |
1252 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
5550fda7 | 1253 | ntoh24(vp->fd_fc_id) == lport->port_id) { |
97c8389d | 1254 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
5550fda7 BPG |
1255 | break; |
1256 | } | |
1257 | /* check if clr_vlink is for NPIV port */ | |
1258 | mutex_lock(&lport->lp_mutex); | |
1259 | list_for_each_entry(vn_port, &lport->vports, list) { | |
1260 | if (compare_ether_addr(vp->fd_mac, | |
1261 | fip->get_src_addr(vn_port)) == 0 && | |
1262 | (get_unaligned_be64(&vp->fd_wwpn) | |
1263 | == vn_port->wwpn) && | |
1264 | (ntoh24(vp->fd_fc_id) == | |
1265 | fc_host_port_id(vn_port->host))) { | |
1266 | desc_mask &= ~BIT(FIP_DT_VN_ID); | |
1267 | is_vn_port = 1; | |
1268 | break; | |
1269 | } | |
1270 | } | |
1271 | mutex_unlock(&lport->lp_mutex); | |
1272 | ||
97c8389d JE |
1273 | break; |
1274 | default: | |
1275 | /* standard says ignore unknown descriptors >= 128 */ | |
1276 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1277 | return; | |
1278 | break; | |
1279 | } | |
1280 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1281 | rlen -= dlen; | |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * reset only if all required descriptors were present and valid. | |
1286 | */ | |
1287 | if (desc_mask) { | |
0f51c2e5 JE |
1288 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1289 | desc_mask); | |
97c8389d | 1290 | } else { |
0f51c2e5 | 1291 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 | 1292 | |
5550fda7 BPG |
1293 | if (is_vn_port) |
1294 | fc_lport_reset(vn_port); | |
1295 | else { | |
fdb068c6 | 1296 | mutex_lock(&fip->ctlr_mutex); |
5550fda7 | 1297 | per_cpu_ptr(lport->dev_stats, |
fdb068c6 JE |
1298 | get_cpu())->VLinkFailureCount++; |
1299 | put_cpu(); | |
5550fda7 | 1300 | fcoe_ctlr_reset(fip); |
fdb068c6 | 1301 | mutex_unlock(&fip->ctlr_mutex); |
5550fda7 BPG |
1302 | |
1303 | fc_lport_reset(fip->lp); | |
1304 | fcoe_ctlr_solicit(fip, NULL); | |
1305 | } | |
97c8389d JE |
1306 | } |
1307 | } | |
1308 | ||
1309 | /** | |
70b51aab RL |
1310 | * fcoe_ctlr_recv() - Receive a FIP packet |
1311 | * @fip: The FCoE controller that received the packet | |
1312 | * @skb: The received FIP packet | |
97c8389d | 1313 | * |
1f4aed81 | 1314 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1315 | */ |
1316 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1317 | { | |
1f4aed81 | 1318 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1319 | schedule_work(&fip->recv_work); |
1320 | } | |
1321 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1322 | ||
1323 | /** | |
70b51aab RL |
1324 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1325 | * @fip: The FCoE controller that received the frame | |
1326 | * @skb: The received FIP frame | |
97c8389d JE |
1327 | * |
1328 | * Returns non-zero if the frame is dropped. | |
1329 | */ | |
1330 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1331 | { | |
1332 | struct fip_header *fiph; | |
1333 | struct ethhdr *eh; | |
1334 | enum fip_state state; | |
1335 | u16 op; | |
1336 | u8 sub; | |
1337 | ||
1338 | if (skb_linearize(skb)) | |
1339 | goto drop; | |
1340 | if (skb->len < sizeof(*fiph)) | |
1341 | goto drop; | |
1342 | eh = eth_hdr(skb); | |
e10f8c66 JE |
1343 | if (fip->mode == FIP_MODE_VN2VN) { |
1344 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1345 | compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && | |
1346 | compare_ether_addr(eh->h_dest, fcoe_all_p2p)) | |
1347 | goto drop; | |
1348 | } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1349 | compare_ether_addr(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1350 | goto drop; |
1351 | fiph = (struct fip_header *)skb->data; | |
1352 | op = ntohs(fiph->fip_op); | |
1353 | sub = fiph->fip_subcode; | |
1354 | ||
97c8389d JE |
1355 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1356 | goto drop; | |
1357 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1358 | goto drop; | |
1359 | ||
fdb068c6 | 1360 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1361 | state = fip->state; |
1362 | if (state == FIP_ST_AUTO) { | |
1363 | fip->map_dest = 0; | |
9b651da9 | 1364 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1365 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1366 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1367 | } |
fdb068c6 | 1368 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1369 | |
1370 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1371 | return fcoe_ctlr_vn_recv(fip, skb); | |
1372 | ||
1373 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && | |
1374 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1375 | goto drop; |
1376 | ||
1377 | if (op == FIP_OP_LS) { | |
1378 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1379 | return 0; | |
1380 | } | |
e10f8c66 JE |
1381 | |
1382 | if (state != FIP_ST_ENABLED) | |
1383 | goto drop; | |
1384 | ||
97c8389d JE |
1385 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1386 | fcoe_ctlr_recv_adv(fip, skb); | |
1387 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1388 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1389 | kfree_skb(skb); | |
1390 | return 0; | |
1391 | drop: | |
1392 | kfree_skb(skb); | |
1393 | return -1; | |
1394 | } | |
1395 | ||
1396 | /** | |
70b51aab RL |
1397 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1398 | * @fip: The FCoE controller | |
97c8389d | 1399 | * |
ba9cd5d0 JE |
1400 | * Returns the selected FCF, or NULL if none are usable. |
1401 | * | |
97c8389d JE |
1402 | * If there are conflicting advertisements, no FCF can be chosen. |
1403 | * | |
794d98e7 JE |
1404 | * If there is already a selected FCF, this will choose a better one or |
1405 | * an equivalent one that hasn't already been sent a FLOGI. | |
1406 | * | |
97c8389d JE |
1407 | * Called with lock held. |
1408 | */ | |
ba9cd5d0 | 1409 | static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) |
97c8389d JE |
1410 | { |
1411 | struct fcoe_fcf *fcf; | |
794d98e7 | 1412 | struct fcoe_fcf *best = fip->sel_fcf; |
b69ae0ae JE |
1413 | struct fcoe_fcf *first; |
1414 | ||
1415 | first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list); | |
97c8389d JE |
1416 | |
1417 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9069f5c4 JE |
1418 | LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " |
1419 | "VFID %d mac %pM map %x val %d " | |
1420 | "sent %u pri %u\n", | |
1421 | fcf->fabric_name, fcf->vfid, fcf->fcf_mac, | |
1422 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), | |
1423 | fcf->flogi_sent, fcf->pri); | |
b69ae0ae JE |
1424 | if (fcf->fabric_name != first->fabric_name || |
1425 | fcf->vfid != first->vfid || | |
1426 | fcf->fc_map != first->fc_map) { | |
1427 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " | |
1428 | "or FC-MAP\n"); | |
1429 | return NULL; | |
1430 | } | |
794d98e7 JE |
1431 | if (fcf->flogi_sent) |
1432 | continue; | |
97c8389d | 1433 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1434 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1435 | "map %x %svalid %savailable\n", | |
1436 | fcf->fabric_name, fcf->fc_map, | |
1437 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1438 | (fcf->flags & FIP_FL_AVAIL) ? | |
1439 | "" : "un"); | |
97c8389d JE |
1440 | continue; |
1441 | } | |
794d98e7 | 1442 | if (!best || fcf->pri < best->pri || best->flogi_sent) |
97c8389d JE |
1443 | best = fcf; |
1444 | } | |
1445 | fip->sel_fcf = best; | |
c47036a7 | 1446 | if (best) { |
9069f5c4 | 1447 | LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); |
c47036a7 JE |
1448 | fip->port_ka_time = jiffies + |
1449 | msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
1450 | fip->ctlr_ka_time = jiffies + best->fka_period; | |
1451 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1452 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
1453 | } | |
ba9cd5d0 | 1454 | return best; |
97c8389d JE |
1455 | } |
1456 | ||
794d98e7 JE |
1457 | /** |
1458 | * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF | |
1459 | * @fip: The FCoE controller | |
1460 | * | |
1461 | * Returns non-zero error if it could not be sent. | |
1462 | * | |
1463 | * Called with ctlr_mutex and ctlr_lock held. | |
1464 | * Caller must verify that fip->sel_fcf is not NULL. | |
1465 | */ | |
1466 | static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) | |
1467 | { | |
1468 | struct sk_buff *skb; | |
1469 | struct sk_buff *skb_orig; | |
1470 | struct fc_frame_header *fh; | |
1471 | int error; | |
1472 | ||
1473 | skb_orig = fip->flogi_req; | |
1474 | if (!skb_orig) | |
1475 | return -EINVAL; | |
1476 | ||
1477 | /* | |
1478 | * Clone and send the FLOGI request. If clone fails, use original. | |
1479 | */ | |
1480 | skb = skb_clone(skb_orig, GFP_ATOMIC); | |
1481 | if (!skb) { | |
1482 | skb = skb_orig; | |
1483 | fip->flogi_req = NULL; | |
1484 | } | |
1485 | fh = (struct fc_frame_header *)skb->data; | |
1486 | error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, | |
1487 | ntoh24(fh->fh_d_id)); | |
1488 | if (error) { | |
1489 | kfree_skb(skb); | |
1490 | return error; | |
1491 | } | |
1492 | fip->send(fip, skb); | |
1493 | fip->sel_fcf->flogi_sent = 1; | |
1494 | return 0; | |
1495 | } | |
1496 | ||
1497 | /** | |
1498 | * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible | |
1499 | * @fip: The FCoE controller | |
1500 | * | |
1501 | * Returns non-zero error code if there's no FLOGI request to retry or | |
1502 | * no alternate FCF available. | |
1503 | */ | |
1504 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) | |
1505 | { | |
1506 | struct fcoe_fcf *fcf; | |
1507 | int error; | |
1508 | ||
1509 | mutex_lock(&fip->ctlr_mutex); | |
1510 | spin_lock_bh(&fip->ctlr_lock); | |
1511 | LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1512 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1513 | if (!fcf || fcf->flogi_sent) { |
1514 | kfree_skb(fip->flogi_req); | |
1515 | fip->flogi_req = NULL; | |
1516 | error = -ENOENT; | |
1517 | } else { | |
1518 | fcoe_ctlr_solicit(fip, NULL); | |
1519 | error = fcoe_ctlr_flogi_send_locked(fip); | |
1520 | } | |
1521 | spin_unlock_bh(&fip->ctlr_lock); | |
1522 | mutex_unlock(&fip->ctlr_mutex); | |
1523 | return error; | |
1524 | } | |
1525 | ||
1526 | ||
1527 | /** | |
1528 | * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. | |
1529 | * @fip: The FCoE controller that timed out | |
1530 | * | |
1531 | * Done here because fcoe_ctlr_els_send() can't get mutex. | |
1532 | * | |
1533 | * Called with ctlr_mutex held. The caller must not hold ctlr_lock. | |
1534 | */ | |
1535 | static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) | |
1536 | { | |
1537 | struct fcoe_fcf *fcf; | |
1538 | ||
1539 | spin_lock_bh(&fip->ctlr_lock); | |
1540 | fcf = fip->sel_fcf; | |
1541 | if (!fcf || !fip->flogi_req_send) | |
1542 | goto unlock; | |
1543 | ||
1544 | LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); | |
1545 | ||
1546 | /* | |
1547 | * If this FLOGI is being sent due to a timeout retry | |
1548 | * to the same FCF as before, select a different FCF if possible. | |
1549 | */ | |
1550 | if (fcf->flogi_sent) { | |
1551 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1552 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1553 | if (!fcf || fcf->flogi_sent) { |
1554 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); | |
1555 | list_for_each_entry(fcf, &fip->fcfs, list) | |
1556 | fcf->flogi_sent = 0; | |
ba9cd5d0 | 1557 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1558 | } |
1559 | } | |
1560 | if (fcf) { | |
1561 | fcoe_ctlr_flogi_send_locked(fip); | |
1562 | fip->flogi_req_send = 0; | |
1563 | } else /* XXX */ | |
1564 | LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); | |
1565 | unlock: | |
1566 | spin_unlock_bh(&fip->ctlr_lock); | |
1567 | } | |
1568 | ||
97c8389d | 1569 | /** |
70b51aab RL |
1570 | * fcoe_ctlr_timeout() - FIP timeout handler |
1571 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1572 | */ |
1573 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1574 | { | |
1575 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1576 | |
1577 | schedule_work(&fip->timer_work); | |
1578 | } | |
1579 | ||
1580 | /** | |
1581 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1582 | * @work: Handle to a FCoE controller | |
1583 | * | |
1584 | * Ages FCFs. Triggers FCF selection if possible. | |
1585 | * Sends keep-alives and resets. | |
1586 | */ | |
1587 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1588 | { | |
1589 | struct fcoe_ctlr *fip; | |
1590 | struct fc_lport *vport; | |
1591 | u8 *mac; | |
1592 | u8 reset = 0; | |
1593 | u8 send_ctlr_ka = 0; | |
1594 | u8 send_port_ka = 0; | |
97c8389d JE |
1595 | struct fcoe_fcf *sel; |
1596 | struct fcoe_fcf *fcf; | |
8690cb83 | 1597 | unsigned long next_timer; |
97c8389d | 1598 | |
fdb068c6 | 1599 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1600 | if (fip->mode == FIP_MODE_VN2VN) |
1601 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1602 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1603 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1604 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1605 | return; |
1606 | } | |
1607 | ||
1608 | fcf = fip->sel_fcf; | |
8690cb83 | 1609 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1610 | |
1611 | sel = fip->sel_fcf; | |
8690cb83 JE |
1612 | if (!sel && fip->sel_time) { |
1613 | if (time_after_eq(jiffies, fip->sel_time)) { | |
ba9cd5d0 | 1614 | sel = fcoe_ctlr_select(fip); |
8690cb83 JE |
1615 | fip->sel_time = 0; |
1616 | } else if (time_after(next_timer, fip->sel_time)) | |
1617 | next_timer = fip->sel_time; | |
97c8389d JE |
1618 | } |
1619 | ||
794d98e7 JE |
1620 | if (sel && fip->flogi_req_send) |
1621 | fcoe_ctlr_flogi_send(fip); | |
1622 | else if (!sel && fcf) | |
1623 | reset = 1; | |
97c8389d | 1624 | |
8cdffdcc | 1625 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1626 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1627 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1628 | send_ctlr_ka = 1; |
97c8389d JE |
1629 | } |
1630 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1631 | next_timer = fip->ctlr_ka_time; | |
1632 | ||
1633 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1634 | fip->port_ka_time = jiffies + |
70b51aab | 1635 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1636 | send_port_ka = 1; |
97c8389d JE |
1637 | } |
1638 | if (time_after(next_timer, fip->port_ka_time)) | |
1639 | next_timer = fip->port_ka_time; | |
97c8389d | 1640 | } |
8690cb83 JE |
1641 | if (!list_empty(&fip->fcfs)) |
1642 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1643 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1644 | |
516a6486 | 1645 | if (reset) { |
dd42dac4 | 1646 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1647 | /* restart things with a solicitation */ |
1648 | fcoe_ctlr_solicit(fip, NULL); | |
1649 | } | |
11b56188 | 1650 | |
fdb068c6 | 1651 | if (send_ctlr_ka) |
11b56188 | 1652 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1653 | |
1654 | if (send_port_ka) { | |
11b56188 CL |
1655 | mutex_lock(&fip->lp->lp_mutex); |
1656 | mac = fip->get_src_addr(fip->lp); | |
1657 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1658 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1659 | mac = fip->get_src_addr(vport); | |
1660 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1661 | } | |
1662 | mutex_unlock(&fip->lp->lp_mutex); | |
1663 | } | |
97c8389d JE |
1664 | } |
1665 | ||
1666 | /** | |
70b51aab RL |
1667 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1668 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1669 | */ |
1670 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1671 | { | |
1672 | struct fcoe_ctlr *fip; | |
1673 | struct sk_buff *skb; | |
1674 | ||
1675 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1676 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1677 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1678 | } |
1679 | ||
1680 | /** | |
386309ce | 1681 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1682 | * @fip: The FCoE controller |
1683 | * @fp: The FC frame to snoop | |
97c8389d JE |
1684 | * |
1685 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1686 | * | |
1687 | * The caller has checked that we are waiting for login as indicated | |
1688 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1689 | * | |
1690 | * The caller is responsible for freeing the frame. | |
386309ce | 1691 | * Fill in the granted_mac address. |
97c8389d JE |
1692 | * |
1693 | * Return non-zero if the frame should not be delivered to libfc. | |
1694 | */ | |
11b56188 | 1695 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1696 | struct fc_frame *fp) |
97c8389d JE |
1697 | { |
1698 | struct fc_frame_header *fh; | |
1699 | u8 op; | |
386309ce | 1700 | u8 *sa; |
97c8389d | 1701 | |
386309ce | 1702 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1703 | fh = fc_frame_header_get(fp); |
1704 | if (fh->fh_type != FC_TYPE_ELS) | |
1705 | return 0; | |
1706 | ||
1707 | op = fc_frame_payload_op(fp); | |
1708 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1709 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1710 | ||
fdb068c6 | 1711 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1712 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1713 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1714 | return -EINVAL; |
1715 | } | |
9b651da9 | 1716 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1717 | LIBFCOE_FIP_DBG(fip, |
1718 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1719 | |
1720 | /* | |
1721 | * FLOGI accepted. | |
1722 | * If the src mac addr is FC_OUI-based, then we mark the | |
1723 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1724 | * Otherwise we use the FCoE gateway addr | |
1725 | */ | |
1726 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
cd229e42 | 1727 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
1728 | } else { |
1729 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1730 | fip->map_dest = 0; | |
1731 | } | |
1732 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1733 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1734 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1735 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1736 | /* | |
1737 | * Save source MAC for point-to-point responses. | |
1738 | */ | |
fdb068c6 | 1739 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1740 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1741 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1742 | fip->map_dest = 0; | |
e49bf614 JE |
1743 | if (fip->state == FIP_ST_AUTO) |
1744 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1745 | "Setting non-FIP mode\n"); | |
9b651da9 | 1746 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1747 | } |
fdb068c6 | 1748 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1749 | } |
1750 | return 0; | |
1751 | } | |
1752 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1753 | ||
5e80f7f7 | 1754 | /** |
70b51aab RL |
1755 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1756 | * @mac: The MAC address to convert | |
1757 | * @scheme: The scheme to use when converting | |
1758 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1759 | * |
1760 | * Returns: u64 fc world wide name | |
1761 | */ | |
1762 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1763 | unsigned int scheme, unsigned int port) | |
1764 | { | |
1765 | u64 wwn; | |
1766 | u64 host_mac; | |
1767 | ||
1768 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1769 | host_mac = ((u64) mac[0] << 40) | | |
1770 | ((u64) mac[1] << 32) | | |
1771 | ((u64) mac[2] << 24) | | |
1772 | ((u64) mac[3] << 16) | | |
1773 | ((u64) mac[4] << 8) | | |
1774 | (u64) mac[5]; | |
1775 | ||
1776 | WARN_ON(host_mac >= (1ULL << 48)); | |
1777 | wwn = host_mac | ((u64) scheme << 60); | |
1778 | switch (scheme) { | |
1779 | case 1: | |
1780 | WARN_ON(port != 0); | |
1781 | break; | |
1782 | case 2: | |
1783 | WARN_ON(port >= 0xfff); | |
1784 | wwn |= (u64) port << 48; | |
1785 | break; | |
1786 | default: | |
1787 | WARN_ON(1); | |
1788 | break; | |
1789 | } | |
1790 | ||
1791 | return wwn; | |
1792 | } | |
1793 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1794 | ||
e10f8c66 JE |
1795 | /** |
1796 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
1797 | * @rdata: libfc remote port | |
1798 | */ | |
1799 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
1800 | { | |
1801 | return (struct fcoe_rport *)(rdata + 1); | |
1802 | } | |
1803 | ||
1804 | /** | |
1805 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
1806 | * @fip: The FCoE controller | |
1807 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
1808 | * @dest: The destination Ethernet MAC address | |
1809 | * @min_len: minimum size of the Ethernet payload to be sent | |
1810 | */ | |
1811 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
1812 | enum fip_vn2vn_subcode sub, | |
1813 | const u8 *dest, size_t min_len) | |
1814 | { | |
1815 | struct sk_buff *skb; | |
1816 | struct fip_frame { | |
1817 | struct ethhdr eth; | |
1818 | struct fip_header fip; | |
1819 | struct fip_mac_desc mac; | |
1820 | struct fip_wwn_desc wwnn; | |
1821 | struct fip_vn_desc vn; | |
1822 | } __attribute__((packed)) *frame; | |
1823 | struct fip_fc4_feat *ff; | |
1824 | struct fip_size_desc *size; | |
1825 | u32 fcp_feat; | |
1826 | size_t len; | |
1827 | size_t dlen; | |
1828 | ||
1829 | len = sizeof(*frame); | |
1830 | dlen = 0; | |
1831 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1832 | dlen = sizeof(struct fip_fc4_feat) + | |
1833 | sizeof(struct fip_size_desc); | |
1834 | len += dlen; | |
1835 | } | |
1836 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
1837 | len = max(len, min_len + sizeof(struct ethhdr)); | |
1838 | ||
1839 | skb = dev_alloc_skb(len); | |
1840 | if (!skb) | |
1841 | return; | |
1842 | ||
1843 | frame = (struct fip_frame *)skb->data; | |
1844 | memset(frame, 0, len); | |
1845 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
1846 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
1847 | frame->eth.h_proto = htons(ETH_P_FIP); | |
1848 | ||
1849 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
1850 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
1851 | frame->fip.fip_subcode = sub; | |
1852 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
1853 | ||
1854 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
1855 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
1856 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
1857 | ||
1858 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
1859 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
1860 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
1861 | ||
1862 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
1863 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
1864 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
1865 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
1866 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
1867 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
1868 | ||
1869 | /* | |
1870 | * For claims, add FC-4 features. | |
1871 | * TBD: Add interface to get fc-4 types and features from libfc. | |
1872 | */ | |
1873 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1874 | ff = (struct fip_fc4_feat *)(frame + 1); | |
1875 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
1876 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
1877 | ff->fd_fts = fip->lp->fcts; | |
1878 | ||
1879 | fcp_feat = 0; | |
1880 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
1881 | fcp_feat |= FCP_FEAT_INIT; | |
1882 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
1883 | fcp_feat |= FCP_FEAT_TARG; | |
1884 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
1885 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
1886 | ||
1887 | size = (struct fip_size_desc *)(ff + 1); | |
1888 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
1889 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
1890 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
1891 | } | |
1892 | ||
1893 | skb_put(skb, len); | |
1894 | skb->protocol = htons(ETH_P_FIP); | |
1895 | skb_reset_mac_header(skb); | |
1896 | skb_reset_network_header(skb); | |
1897 | ||
1898 | fip->send(fip, skb); | |
1899 | } | |
1900 | ||
1901 | /** | |
1902 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
1903 | * @lport: The lport which is receiving the event | |
1904 | * @rdata: remote port private data | |
1905 | * @event: The event that occured | |
1906 | * | |
1907 | * Locking Note: The rport lock must not be held when calling this function. | |
1908 | */ | |
1909 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
1910 | struct fc_rport_priv *rdata, | |
1911 | enum fc_rport_event event) | |
1912 | { | |
1913 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1914 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
1915 | ||
1916 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
1917 | rdata->ids.port_id, event); | |
1918 | ||
1919 | mutex_lock(&fip->ctlr_mutex); | |
1920 | switch (event) { | |
1921 | case RPORT_EV_READY: | |
1922 | frport->login_count = 0; | |
1923 | break; | |
1924 | case RPORT_EV_LOGO: | |
1925 | case RPORT_EV_FAILED: | |
1926 | case RPORT_EV_STOP: | |
1927 | frport->login_count++; | |
1928 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
1929 | LIBFCOE_FIP_DBG(fip, | |
1930 | "rport FLOGI limited port_id %6.6x\n", | |
1931 | rdata->ids.port_id); | |
1932 | lport->tt.rport_logoff(rdata); | |
1933 | } | |
1934 | break; | |
1935 | default: | |
1936 | break; | |
1937 | } | |
1938 | mutex_unlock(&fip->ctlr_mutex); | |
1939 | } | |
1940 | ||
1941 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
1942 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
1943 | }; | |
1944 | ||
1945 | /** | |
1946 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
1947 | * @fip: The FCoE controller | |
1948 | * | |
1949 | * Called with ctlr_mutex held. | |
1950 | */ | |
1951 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
1952 | { | |
1953 | mutex_lock(&lport->disc.disc_mutex); | |
1954 | lport->disc.disc_callback = NULL; | |
1955 | mutex_unlock(&lport->disc.disc_mutex); | |
1956 | } | |
1957 | ||
1958 | /** | |
1959 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
1960 | * @fip: The FCoE controller | |
1961 | * | |
1962 | * Called through the local port template for discovery. | |
1963 | * Called without the ctlr_mutex held. | |
1964 | */ | |
1965 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
1966 | { | |
1967 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1968 | ||
1969 | mutex_lock(&fip->ctlr_mutex); | |
1970 | fcoe_ctlr_disc_stop_locked(lport); | |
1971 | mutex_unlock(&fip->ctlr_mutex); | |
1972 | } | |
1973 | ||
1974 | /** | |
1975 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
1976 | * @fip: The FCoE controller | |
1977 | * | |
1978 | * Called through the local port template for discovery. | |
1979 | * Called without the ctlr_mutex held. | |
1980 | */ | |
1981 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
1982 | { | |
1983 | fcoe_ctlr_disc_stop(lport); | |
1984 | lport->tt.rport_flush_queue(); | |
1985 | synchronize_rcu(); | |
1986 | } | |
1987 | ||
1988 | /** | |
1989 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
1990 | * @fip: The FCoE controller | |
1991 | * | |
1992 | * Called with fcoe_ctlr lock held. | |
1993 | */ | |
1994 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
1995 | { | |
1996 | unsigned long wait; | |
1997 | u32 port_id; | |
1998 | ||
1999 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
2000 | ||
2001 | /* | |
2002 | * Get proposed port ID. | |
2003 | * If this is the first try after link up, use any previous port_id. | |
2004 | * If there was none, use the low bits of the port_name. | |
2005 | * On subsequent tries, get the next random one. | |
2006 | * Don't use reserved IDs, use another non-zero value, just as random. | |
2007 | */ | |
2008 | port_id = fip->port_id; | |
2009 | if (fip->probe_tries) | |
2010 | port_id = prandom32(&fip->rnd_state) & 0xffff; | |
2011 | else if (!port_id) | |
2012 | port_id = fip->lp->wwpn & 0xffff; | |
2013 | if (!port_id || port_id == 0xffff) | |
2014 | port_id = 1; | |
2015 | fip->port_id = port_id; | |
2016 | ||
2017 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
2018 | fip->probe_tries++; | |
2019 | wait = random32() % FIP_VN_PROBE_WAIT; | |
2020 | } else | |
2021 | wait = FIP_VN_RLIM_INT; | |
2022 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
2023 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
2024 | } | |
2025 | ||
2026 | /** | |
2027 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
2028 | * @fip: The FCoE controller | |
2029 | * | |
2030 | * Called with fcoe_ctlr lock held. | |
2031 | */ | |
2032 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
2033 | { | |
2034 | fip->probe_tries = 0; | |
2035 | prandom32_seed(&fip->rnd_state, fip->lp->wwpn); | |
2036 | fcoe_ctlr_vn_restart(fip); | |
2037 | } | |
2038 | ||
2039 | /** | |
2040 | * fcoe_ctlr_vn_parse - parse probe request or response | |
2041 | * @fip: The FCoE controller | |
2042 | * @skb: incoming packet | |
2043 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
2044 | * | |
2045 | * Returns non-zero error number on error. | |
2046 | * Does not consume the packet. | |
2047 | */ | |
2048 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
2049 | struct sk_buff *skb, | |
2050 | struct fc_rport_priv *rdata) | |
2051 | { | |
2052 | struct fip_header *fiph; | |
2053 | struct fip_desc *desc = NULL; | |
2054 | struct fip_mac_desc *macd = NULL; | |
2055 | struct fip_wwn_desc *wwn = NULL; | |
2056 | struct fip_vn_desc *vn = NULL; | |
2057 | struct fip_size_desc *size = NULL; | |
2058 | struct fcoe_rport *frport; | |
2059 | size_t rlen; | |
2060 | size_t dlen; | |
2061 | u32 desc_mask = 0; | |
2062 | u32 dtype; | |
2063 | u8 sub; | |
2064 | ||
2065 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2066 | frport = fcoe_ctlr_rport(rdata); | |
2067 | ||
2068 | fiph = (struct fip_header *)skb->data; | |
2069 | frport->flags = ntohs(fiph->fip_flags); | |
2070 | ||
2071 | sub = fiph->fip_subcode; | |
2072 | switch (sub) { | |
2073 | case FIP_SC_VN_PROBE_REQ: | |
2074 | case FIP_SC_VN_PROBE_REP: | |
2075 | case FIP_SC_VN_BEACON: | |
2076 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2077 | BIT(FIP_DT_VN_ID); | |
2078 | break; | |
2079 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2080 | case FIP_SC_VN_CLAIM_REP: | |
2081 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2082 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
2083 | BIT(FIP_DT_FCOE_SIZE); | |
2084 | break; | |
2085 | default: | |
2086 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2087 | return -EINVAL; | |
2088 | } | |
2089 | ||
2090 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2091 | if (rlen + sizeof(*fiph) > skb->len) | |
2092 | return -EINVAL; | |
2093 | ||
2094 | desc = (struct fip_desc *)(fiph + 1); | |
2095 | while (rlen > 0) { | |
2096 | dlen = desc->fip_dlen * FIP_BPW; | |
2097 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2098 | return -EINVAL; | |
2099 | ||
2100 | dtype = desc->fip_dtype; | |
2101 | if (dtype < 32) { | |
2102 | if (!(desc_mask & BIT(dtype))) { | |
2103 | LIBFCOE_FIP_DBG(fip, | |
2104 | "unexpected or duplicated desc " | |
2105 | "desc type %u in " | |
2106 | "FIP VN2VN subtype %u\n", | |
2107 | dtype, sub); | |
2108 | return -EINVAL; | |
2109 | } | |
2110 | desc_mask &= ~BIT(dtype); | |
2111 | } | |
2112 | ||
2113 | switch (dtype) { | |
2114 | case FIP_DT_MAC: | |
2115 | if (dlen != sizeof(struct fip_mac_desc)) | |
2116 | goto len_err; | |
2117 | macd = (struct fip_mac_desc *)desc; | |
2118 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2119 | LIBFCOE_FIP_DBG(fip, | |
2120 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2121 | macd->fd_mac); | |
2122 | return -EINVAL; | |
2123 | } | |
2124 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2125 | break; | |
2126 | case FIP_DT_NAME: | |
2127 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2128 | goto len_err; | |
2129 | wwn = (struct fip_wwn_desc *)desc; | |
2130 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2131 | break; | |
2132 | case FIP_DT_VN_ID: | |
2133 | if (dlen != sizeof(struct fip_vn_desc)) | |
2134 | goto len_err; | |
2135 | vn = (struct fip_vn_desc *)desc; | |
2136 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
2137 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
2138 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
2139 | break; | |
2140 | case FIP_DT_FC4F: | |
2141 | if (dlen != sizeof(struct fip_fc4_feat)) | |
2142 | goto len_err; | |
2143 | break; | |
2144 | case FIP_DT_FCOE_SIZE: | |
2145 | if (dlen != sizeof(struct fip_size_desc)) | |
2146 | goto len_err; | |
2147 | size = (struct fip_size_desc *)desc; | |
2148 | frport->fcoe_len = ntohs(size->fd_size); | |
2149 | break; | |
2150 | default: | |
2151 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2152 | "in FIP probe\n", dtype); | |
2153 | /* standard says ignore unknown descriptors >= 128 */ | |
2154 | if (dtype < FIP_DT_VENDOR_BASE) | |
2155 | return -EINVAL; | |
2156 | break; | |
2157 | } | |
2158 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2159 | rlen -= dlen; | |
2160 | } | |
2161 | return 0; | |
2162 | ||
2163 | len_err: | |
2164 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2165 | dtype, dlen); | |
2166 | return -EINVAL; | |
2167 | } | |
2168 | ||
2169 | /** | |
2170 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
2171 | * @fip: The FCoE controller | |
2172 | * | |
2173 | * Called with ctlr_mutex held. | |
2174 | */ | |
2175 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
2176 | { | |
2177 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
2178 | fip->sol_time = jiffies; | |
2179 | } | |
2180 | ||
2181 | /** | |
2182 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
2183 | * @fip: The FCoE controller | |
2184 | * @rdata: parsed remote port with frport from the probe request | |
2185 | * | |
2186 | * Called with ctlr_mutex held. | |
2187 | */ | |
2188 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
2189 | struct fc_rport_priv *rdata) | |
2190 | { | |
2191 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2192 | ||
2193 | if (rdata->ids.port_id != fip->port_id) | |
2194 | return; | |
2195 | ||
2196 | switch (fip->state) { | |
2197 | case FIP_ST_VNMP_CLAIM: | |
2198 | case FIP_ST_VNMP_UP: | |
2199 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2200 | frport->enode_mac, 0); | |
2201 | break; | |
2202 | case FIP_ST_VNMP_PROBE1: | |
2203 | case FIP_ST_VNMP_PROBE2: | |
2204 | /* | |
2205 | * Decide whether to reply to the Probe. | |
2206 | * Our selected address is never a "recorded" one, so | |
2207 | * only reply if our WWPN is greater and the | |
2208 | * Probe's REC bit is not set. | |
2209 | * If we don't reply, we will change our address. | |
2210 | */ | |
2211 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2212 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
2213 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2214 | frport->enode_mac, 0); | |
2215 | break; | |
2216 | } | |
2217 | /* fall through */ | |
2218 | case FIP_ST_VNMP_START: | |
2219 | fcoe_ctlr_vn_restart(fip); | |
2220 | break; | |
2221 | default: | |
2222 | break; | |
2223 | } | |
2224 | } | |
2225 | ||
2226 | /** | |
2227 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2228 | * @fip: The FCoE controller | |
2229 | * @rdata: parsed remote port with frport from the probe request | |
2230 | * | |
2231 | * Called with ctlr_mutex held. | |
2232 | */ | |
2233 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2234 | struct fc_rport_priv *rdata) | |
2235 | { | |
2236 | if (rdata->ids.port_id != fip->port_id) | |
2237 | return; | |
2238 | switch (fip->state) { | |
2239 | case FIP_ST_VNMP_START: | |
2240 | case FIP_ST_VNMP_PROBE1: | |
2241 | case FIP_ST_VNMP_PROBE2: | |
2242 | case FIP_ST_VNMP_CLAIM: | |
2243 | fcoe_ctlr_vn_restart(fip); | |
2244 | break; | |
2245 | case FIP_ST_VNMP_UP: | |
2246 | fcoe_ctlr_vn_send_claim(fip); | |
2247 | break; | |
2248 | default: | |
2249 | break; | |
2250 | } | |
2251 | } | |
2252 | ||
2253 | /** | |
2254 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2255 | * @fip: The FCoE controller | |
2256 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2257 | * | |
2258 | * Called with ctlr_mutex held. | |
2259 | */ | |
2260 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2261 | { | |
2262 | struct fc_lport *lport = fip->lp; | |
2263 | struct fc_rport_priv *rdata; | |
2264 | struct fc_rport_identifiers *ids; | |
2265 | struct fcoe_rport *frport; | |
2266 | u32 port_id; | |
2267 | ||
2268 | port_id = new->ids.port_id; | |
2269 | if (port_id == fip->port_id) | |
2270 | return; | |
2271 | ||
2272 | mutex_lock(&lport->disc.disc_mutex); | |
2273 | rdata = lport->tt.rport_create(lport, port_id); | |
2274 | if (!rdata) { | |
2275 | mutex_unlock(&lport->disc.disc_mutex); | |
2276 | return; | |
2277 | } | |
2278 | ||
2279 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2280 | rdata->disc_id = lport->disc.disc_id; | |
2281 | ||
2282 | ids = &rdata->ids; | |
2283 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
2284 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) | |
2285 | lport->tt.rport_logoff(rdata); | |
2286 | ids->port_name = new->ids.port_name; | |
2287 | ids->node_name = new->ids.node_name; | |
2288 | mutex_unlock(&lport->disc.disc_mutex); | |
2289 | ||
2290 | frport = fcoe_ctlr_rport(rdata); | |
2291 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", | |
2292 | port_id, frport->fcoe_len ? "old" : "new"); | |
2293 | *frport = *fcoe_ctlr_rport(new); | |
2294 | frport->time = 0; | |
2295 | } | |
2296 | ||
2297 | /** | |
2298 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2299 | * @fip: The FCoE controller | |
2300 | * @port_id: The port_id of the remote VN_node | |
2301 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2302 | * | |
2303 | * Returns non-zero error if no remote port found. | |
2304 | */ | |
2305 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2306 | { | |
2307 | struct fc_lport *lport = fip->lp; | |
2308 | struct fc_rport_priv *rdata; | |
2309 | struct fcoe_rport *frport; | |
2310 | int ret = -1; | |
2311 | ||
2312 | rcu_read_lock(); | |
2313 | rdata = lport->tt.rport_lookup(lport, port_id); | |
2314 | if (rdata) { | |
2315 | frport = fcoe_ctlr_rport(rdata); | |
2316 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2317 | ret = 0; | |
2318 | } | |
2319 | rcu_read_unlock(); | |
2320 | return ret; | |
2321 | } | |
2322 | ||
2323 | /** | |
2324 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2325 | * @fip: The FCoE controller | |
2326 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2327 | * | |
2328 | * Called with ctlr_mutex held. | |
2329 | */ | |
2330 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2331 | struct fc_rport_priv *new) | |
2332 | { | |
2333 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2334 | ||
2335 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2336 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2337 | return; | |
2338 | } | |
2339 | switch (fip->state) { | |
2340 | case FIP_ST_VNMP_START: | |
2341 | case FIP_ST_VNMP_PROBE1: | |
2342 | case FIP_ST_VNMP_PROBE2: | |
2343 | if (new->ids.port_id == fip->port_id) | |
2344 | fcoe_ctlr_vn_restart(fip); | |
2345 | break; | |
2346 | case FIP_ST_VNMP_CLAIM: | |
2347 | case FIP_ST_VNMP_UP: | |
2348 | if (new->ids.port_id == fip->port_id) { | |
2349 | if (new->ids.port_name > fip->lp->wwpn) { | |
2350 | fcoe_ctlr_vn_restart(fip); | |
2351 | break; | |
2352 | } | |
2353 | fcoe_ctlr_vn_send_claim(fip); | |
2354 | break; | |
2355 | } | |
2356 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, | |
2357 | min((u32)frport->fcoe_len, | |
2358 | fcoe_ctlr_fcoe_size(fip))); | |
2359 | fcoe_ctlr_vn_add(fip, new); | |
2360 | break; | |
2361 | default: | |
2362 | break; | |
2363 | } | |
2364 | } | |
2365 | ||
2366 | /** | |
2367 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2368 | * @fip: The FCoE controller that received the frame | |
2369 | * @new: newly-parsed remote port with frport from the Claim Response | |
2370 | * | |
2371 | * Called with ctlr_mutex held. | |
2372 | */ | |
2373 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2374 | struct fc_rport_priv *new) | |
2375 | { | |
2376 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2377 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2378 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2379 | fcoe_ctlr_vn_add(fip, new); | |
2380 | } | |
2381 | ||
2382 | /** | |
2383 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2384 | * @fip: The FCoE controller that received the frame | |
2385 | * @new: newly-parsed remote port with frport from the Beacon | |
2386 | * | |
2387 | * Called with ctlr_mutex held. | |
2388 | */ | |
2389 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2390 | struct fc_rport_priv *new) | |
2391 | { | |
2392 | struct fc_lport *lport = fip->lp; | |
2393 | struct fc_rport_priv *rdata; | |
2394 | struct fcoe_rport *frport; | |
2395 | ||
2396 | frport = fcoe_ctlr_rport(new); | |
2397 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2398 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2399 | return; | |
2400 | } | |
2401 | mutex_lock(&lport->disc.disc_mutex); | |
2402 | rdata = lport->tt.rport_lookup(lport, new->ids.port_id); | |
2403 | if (rdata) | |
2404 | kref_get(&rdata->kref); | |
2405 | mutex_unlock(&lport->disc.disc_mutex); | |
2406 | if (rdata) { | |
2407 | if (rdata->ids.node_name == new->ids.node_name && | |
2408 | rdata->ids.port_name == new->ids.port_name) { | |
2409 | frport = fcoe_ctlr_rport(rdata); | |
2410 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) | |
2411 | lport->tt.rport_login(rdata); | |
2412 | frport->time = jiffies; | |
2413 | } | |
2414 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
2415 | return; | |
2416 | } | |
2417 | if (fip->state != FIP_ST_VNMP_UP) | |
2418 | return; | |
2419 | ||
2420 | /* | |
2421 | * Beacon from a new neighbor. | |
2422 | * Send a claim notify if one hasn't been sent recently. | |
2423 | * Don't add the neighbor yet. | |
2424 | */ | |
2425 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2426 | new->ids.port_id); | |
2427 | if (time_after(jiffies, | |
2428 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2429 | fcoe_ctlr_vn_send_claim(fip); | |
2430 | } | |
2431 | ||
2432 | /** | |
2433 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2434 | * @fip: The FCoE controller | |
2435 | * | |
2436 | * Called with ctlr_mutex held. | |
2437 | * Called only in state FIP_ST_VNMP_UP. | |
2438 | * Returns the soonest time for next age-out or a time far in the future. | |
2439 | */ | |
2440 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2441 | { | |
2442 | struct fc_lport *lport = fip->lp; | |
2443 | struct fc_rport_priv *rdata; | |
2444 | struct fcoe_rport *frport; | |
2445 | unsigned long next_time; | |
2446 | unsigned long deadline; | |
2447 | ||
2448 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
2449 | mutex_lock(&lport->disc.disc_mutex); | |
2450 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { | |
2451 | frport = fcoe_ctlr_rport(rdata); | |
2452 | if (!frport->time) | |
2453 | continue; | |
2454 | deadline = frport->time + | |
2455 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2456 | if (time_after_eq(jiffies, deadline)) { | |
2457 | frport->time = 0; | |
2458 | LIBFCOE_FIP_DBG(fip, | |
2459 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2460 | rdata->ids.port_name, rdata->ids.port_id); | |
2461 | lport->tt.rport_logoff(rdata); | |
2462 | } else if (time_before(deadline, next_time)) | |
2463 | next_time = deadline; | |
2464 | } | |
2465 | mutex_unlock(&lport->disc.disc_mutex); | |
2466 | return next_time; | |
2467 | } | |
2468 | ||
2469 | /** | |
2470 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2471 | * @fip: The FCoE controller that received the frame | |
2472 | * @skb: The received FIP frame | |
2473 | * | |
2474 | * Returns non-zero if the frame is dropped. | |
2475 | * Always consumes the frame. | |
2476 | */ | |
2477 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2478 | { | |
2479 | struct fip_header *fiph; | |
2480 | enum fip_vn2vn_subcode sub; | |
2dc02ee5 | 2481 | struct { |
e10f8c66 JE |
2482 | struct fc_rport_priv rdata; |
2483 | struct fcoe_rport frport; | |
2484 | } buf; | |
2485 | int rc; | |
2486 | ||
2487 | fiph = (struct fip_header *)skb->data; | |
2488 | sub = fiph->fip_subcode; | |
2489 | ||
2490 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); | |
2491 | if (rc) { | |
2492 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2493 | goto drop; | |
2494 | } | |
2495 | ||
2496 | mutex_lock(&fip->ctlr_mutex); | |
2497 | switch (sub) { | |
2498 | case FIP_SC_VN_PROBE_REQ: | |
2499 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2500 | break; | |
2501 | case FIP_SC_VN_PROBE_REP: | |
2502 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2503 | break; | |
2504 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2505 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2506 | break; | |
2507 | case FIP_SC_VN_CLAIM_REP: | |
2508 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2509 | break; | |
2510 | case FIP_SC_VN_BEACON: | |
2511 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2512 | break; | |
2513 | default: | |
2514 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2515 | rc = -1; | |
2516 | break; | |
2517 | } | |
2518 | mutex_unlock(&fip->ctlr_mutex); | |
2519 | drop: | |
2520 | kfree_skb(skb); | |
2521 | return rc; | |
2522 | } | |
2523 | ||
2524 | /** | |
2525 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
92261156 JE |
2526 | * @lport: The local port |
2527 | * @fp: The received frame | |
e10f8c66 JE |
2528 | * |
2529 | * This should never be called since we don't see RSCNs or other | |
2530 | * fabric-generated ELSes. | |
2531 | */ | |
92261156 | 2532 | static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) |
e10f8c66 JE |
2533 | { |
2534 | struct fc_seq_els_data rjt_data; | |
2535 | ||
e10f8c66 JE |
2536 | rjt_data.reason = ELS_RJT_UNSUP; |
2537 | rjt_data.explan = ELS_EXPL_NONE; | |
92261156 | 2538 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
e10f8c66 JE |
2539 | fc_frame_free(fp); |
2540 | } | |
2541 | ||
2542 | /** | |
2543 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
2544 | * @fip: The FCoE controller | |
2545 | * | |
2546 | * This sets a flag indicating that remote ports should be created | |
2547 | * and started for the peers we discover. We use the disc_callback | |
2548 | * pointer as that flag. Peers already discovered are created here. | |
2549 | * | |
2550 | * The lport lock is held during this call. The callback must be done | |
2551 | * later, without holding either the lport or discovery locks. | |
2552 | * The fcoe_ctlr lock may also be held during this call. | |
2553 | */ | |
2554 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
2555 | enum fc_disc_event), | |
2556 | struct fc_lport *lport) | |
2557 | { | |
2558 | struct fc_disc *disc = &lport->disc; | |
2559 | struct fcoe_ctlr *fip = disc->priv; | |
2560 | ||
2561 | mutex_lock(&disc->disc_mutex); | |
2562 | disc->disc_callback = callback; | |
2563 | disc->disc_id = (disc->disc_id + 2) | 1; | |
2564 | disc->pending = 1; | |
2565 | schedule_work(&fip->timer_work); | |
2566 | mutex_unlock(&disc->disc_mutex); | |
2567 | } | |
2568 | ||
2569 | /** | |
2570 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
2571 | * @fip: The FCoE controller | |
2572 | * | |
2573 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
2574 | * we've received at least one beacon. | |
2575 | * Performs the discovery complete callback. | |
2576 | */ | |
2577 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
2578 | { | |
2579 | struct fc_lport *lport = fip->lp; | |
2580 | struct fc_disc *disc = &lport->disc; | |
2581 | struct fc_rport_priv *rdata; | |
2582 | struct fcoe_rport *frport; | |
2583 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
2584 | ||
2585 | mutex_lock(&disc->disc_mutex); | |
2586 | callback = disc->pending ? disc->disc_callback : NULL; | |
2587 | disc->pending = 0; | |
2588 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
2589 | frport = fcoe_ctlr_rport(rdata); | |
2590 | if (frport->time) | |
2591 | lport->tt.rport_login(rdata); | |
2592 | } | |
2593 | mutex_unlock(&disc->disc_mutex); | |
2594 | if (callback) | |
2595 | callback(lport, DISC_EV_SUCCESS); | |
2596 | } | |
2597 | ||
2598 | /** | |
2599 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
2600 | * @fip: The FCoE controller | |
2601 | */ | |
2602 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
2603 | { | |
2604 | unsigned long next_time; | |
2605 | u8 mac[ETH_ALEN]; | |
2606 | u32 new_port_id = 0; | |
2607 | ||
2608 | mutex_lock(&fip->ctlr_mutex); | |
2609 | switch (fip->state) { | |
2610 | case FIP_ST_VNMP_START: | |
2611 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
2612 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2613 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
2614 | break; | |
2615 | case FIP_ST_VNMP_PROBE1: | |
2616 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
2617 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2618 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2619 | break; | |
2620 | case FIP_ST_VNMP_PROBE2: | |
2621 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
2622 | new_port_id = fip->port_id; | |
2623 | hton24(mac, FIP_VN_FC_MAP); | |
2624 | hton24(mac + 3, new_port_id); | |
cd229e42 | 2625 | fcoe_ctlr_map_dest(fip); |
e10f8c66 JE |
2626 | fip->update_mac(fip->lp, mac); |
2627 | fcoe_ctlr_vn_send_claim(fip); | |
2628 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2629 | break; | |
2630 | case FIP_ST_VNMP_CLAIM: | |
2631 | /* | |
2632 | * This may be invoked either by starting discovery so don't | |
2633 | * go to the next state unless it's been long enough. | |
2634 | */ | |
2635 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2636 | if (time_after_eq(jiffies, next_time)) { | |
2637 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
2638 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2639 | fcoe_all_vn2vn, 0); | |
2640 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2641 | fip->port_ka_time = next_time; | |
2642 | } | |
2643 | fcoe_ctlr_vn_disc(fip); | |
2644 | break; | |
2645 | case FIP_ST_VNMP_UP: | |
2646 | next_time = fcoe_ctlr_vn_age(fip); | |
2647 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
2648 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2649 | fcoe_all_vn2vn, 0); | |
2650 | fip->port_ka_time = jiffies + | |
2651 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
2652 | (random32() % FIP_VN_BEACON_FUZZ)); | |
2653 | } | |
2654 | if (time_before(fip->port_ka_time, next_time)) | |
2655 | next_time = fip->port_ka_time; | |
2656 | break; | |
2657 | case FIP_ST_LINK_WAIT: | |
2658 | goto unlock; | |
2659 | default: | |
11aa9900 | 2660 | WARN(1, "unexpected state %d\n", fip->state); |
e10f8c66 JE |
2661 | goto unlock; |
2662 | } | |
2663 | mod_timer(&fip->timer, next_time); | |
2664 | unlock: | |
2665 | mutex_unlock(&fip->ctlr_mutex); | |
2666 | ||
2667 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
2668 | if (new_port_id) | |
2669 | fc_lport_set_local_id(fip->lp, new_port_id); | |
2670 | } | |
2671 | ||
5e80f7f7 | 2672 | /** |
70b51aab RL |
2673 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
2674 | * @lp: The local port to configure libfc for | |
e10f8c66 | 2675 | * @fip: The FCoE controller in use by the local port |
70b51aab | 2676 | * @tt: The libfc function template |
e10f8c66 | 2677 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
2678 | * |
2679 | * Returns : 0 for success | |
2680 | */ | |
e10f8c66 JE |
2681 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2682 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
2683 | { |
2684 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 2685 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 2686 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 2687 | return -ENOMEM; |
70b51aab RL |
2688 | fc_exch_init(lport); |
2689 | fc_elsct_init(lport); | |
2690 | fc_lport_init(lport); | |
e10f8c66 JE |
2691 | if (fip->mode == FIP_MODE_VN2VN) |
2692 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
70b51aab | 2693 | fc_rport_init(lport); |
e10f8c66 JE |
2694 | if (fip->mode == FIP_MODE_VN2VN) { |
2695 | lport->point_to_multipoint = 1; | |
2696 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
2697 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
2698 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
2699 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
2700 | mutex_init(&lport->disc.disc_mutex); | |
2701 | INIT_LIST_HEAD(&lport->disc.rports); | |
2702 | lport->disc.priv = fip; | |
2703 | } else { | |
2704 | fc_disc_init(lport); | |
2705 | } | |
5e80f7f7 VD |
2706 | return 0; |
2707 | } | |
2708 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); |