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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
35 | #include <net/rtnetlink.h> |
36 | ||
37 | #include <scsi/fc/fc_els.h> | |
38 | #include <scsi/fc/fc_fs.h> | |
39 | #include <scsi/fc/fc_fip.h> | |
40 | #include <scsi/fc/fc_encaps.h> | |
41 | #include <scsi/fc/fc_fcoe.h> | |
e10f8c66 | 42 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
43 | |
44 | #include <scsi/libfc.h> | |
97c8389d | 45 | #include <scsi/libfcoe.h> |
9b34ecff | 46 | |
21b7b2f5 YZ |
47 | #include "libfcoe.h" |
48 | ||
9b34ecff | 49 | MODULE_AUTHOR("Open-FCoE.org"); |
97c8389d | 50 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
9b34ecff | 51 | MODULE_LICENSE("GPL v2"); |
5e80f7f7 | 52 | |
97c8389d JE |
53 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
54 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
55 | ||
56 | static void fcoe_ctlr_timeout(unsigned long); | |
42913657 | 57 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d | 58 | static void fcoe_ctlr_recv_work(struct work_struct *); |
794d98e7 | 59 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); |
97c8389d | 60 | |
e10f8c66 JE |
61 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); |
62 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); | |
63 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); | |
64 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); | |
65 | ||
97c8389d | 66 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
67 | static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; |
68 | static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; | |
69 | static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; | |
97c8389d | 70 | |
650bd12b RL |
71 | unsigned int libfcoe_debug_logging; |
72 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
73 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
97c8389d | 74 | |
9b651da9 JE |
75 | static const char *fcoe_ctlr_states[] = { |
76 | [FIP_ST_DISABLED] = "DISABLED", | |
77 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
78 | [FIP_ST_AUTO] = "AUTO", | |
79 | [FIP_ST_NON_FIP] = "NON_FIP", | |
80 | [FIP_ST_ENABLED] = "ENABLED", | |
e10f8c66 JE |
81 | [FIP_ST_VNMP_START] = "VNMP_START", |
82 | [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", | |
83 | [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", | |
84 | [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", | |
85 | [FIP_ST_VNMP_UP] = "VNMP_UP", | |
9b651da9 JE |
86 | }; |
87 | ||
88 | static const char *fcoe_ctlr_state(enum fip_state state) | |
89 | { | |
90 | const char *cp = "unknown"; | |
91 | ||
92 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
93 | cp = fcoe_ctlr_states[state]; | |
94 | if (!cp) | |
95 | cp = "unknown"; | |
96 | return cp; | |
97 | } | |
98 | ||
99 | /** | |
100 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
101 | * @fip: The FCoE controller | |
102 | * @state: The new state | |
103 | */ | |
104 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
105 | { | |
106 | if (state == fip->state) | |
107 | return; | |
108 | if (fip->lp) | |
109 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
110 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
111 | fip->state = state; | |
112 | } | |
113 | ||
70b51aab RL |
114 | /** |
115 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
116 | * @fcf: The FCF to check | |
117 | * | |
97c8389d JE |
118 | * Return non-zero if FCF fcoe_size has been validated. |
119 | */ | |
120 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
121 | { | |
122 | return (fcf->flags & FIP_FL_SOL) != 0; | |
123 | } | |
124 | ||
70b51aab RL |
125 | /** |
126 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
127 | * @fcf: The FCF to check | |
128 | * | |
97c8389d JE |
129 | * Return non-zero if the FCF is usable. |
130 | */ | |
131 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
132 | { | |
133 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
134 | ||
135 | return (fcf->flags & flags) == flags; | |
136 | } | |
137 | ||
cd229e42 JE |
138 | /** |
139 | * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses | |
140 | * @fip: The FCoE controller | |
141 | */ | |
142 | static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) | |
143 | { | |
144 | if (fip->mode == FIP_MODE_VN2VN) | |
145 | hton24(fip->dest_addr, FIP_VN_FC_MAP); | |
146 | else | |
147 | hton24(fip->dest_addr, FIP_DEF_FC_MAP); | |
148 | hton24(fip->dest_addr + 3, 0); | |
149 | fip->map_dest = 1; | |
150 | } | |
151 | ||
97c8389d | 152 | /** |
70b51aab RL |
153 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
154 | * @fip: The FCoE controller to initialize | |
97c8389d | 155 | */ |
3d902ac0 | 156 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 157 | { |
9b651da9 | 158 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 159 | fip->mode = mode; |
97c8389d | 160 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 161 | mutex_init(&fip->ctlr_mutex); |
794d98e7 | 162 | spin_lock_init(&fip->ctlr_lock); |
97c8389d JE |
163 | fip->flogi_oxid = FC_XID_UNKNOWN; |
164 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 165 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
166 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
167 | skb_queue_head_init(&fip->fip_recv_list); | |
168 | } | |
169 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
170 | ||
171 | /** | |
70b51aab RL |
172 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
173 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
174 | * |
175 | * Called with &fcoe_ctlr lock held. | |
176 | */ | |
177 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
178 | { | |
179 | struct fcoe_fcf *fcf; | |
180 | struct fcoe_fcf *next; | |
181 | ||
182 | fip->sel_fcf = NULL; | |
183 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
184 | list_del(&fcf->list); | |
185 | kfree(fcf); | |
186 | } | |
187 | fip->fcf_count = 0; | |
188 | fip->sel_time = 0; | |
189 | } | |
190 | ||
191 | /** | |
70b51aab RL |
192 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
193 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
194 | * |
195 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
196 | * | |
197 | * The receive handler will have been deleted before this to guarantee | |
198 | * that no more recv_work will be scheduled. | |
199 | * | |
200 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
201 | * This guarantees that no further timeouts or work will be scheduled. | |
202 | */ | |
203 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
204 | { | |
a4b7cfae | 205 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 206 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 207 | |
fdb068c6 | 208 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 209 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 210 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 211 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 212 | del_timer_sync(&fip->timer); |
42913657 | 213 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
214 | } |
215 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
216 | ||
69316ee2 | 217 | /** |
794d98e7 | 218 | * fcoe_ctlr_announce() - announce new FCF selection |
69316ee2 JE |
219 | * @fip: The FCoE controller |
220 | * | |
221 | * Also sets the destination MAC for FCoE and control packets | |
794d98e7 JE |
222 | * |
223 | * Called with neither ctlr_mutex nor ctlr_lock held. | |
69316ee2 JE |
224 | */ |
225 | static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) | |
226 | { | |
794d98e7 JE |
227 | struct fcoe_fcf *sel; |
228 | struct fcoe_fcf *fcf; | |
229 | ||
230 | mutex_lock(&fip->ctlr_mutex); | |
231 | spin_lock_bh(&fip->ctlr_lock); | |
232 | ||
233 | kfree_skb(fip->flogi_req); | |
234 | fip->flogi_req = NULL; | |
235 | list_for_each_entry(fcf, &fip->fcfs, list) | |
236 | fcf->flogi_sent = 0; | |
237 | ||
238 | spin_unlock_bh(&fip->ctlr_lock); | |
239 | sel = fip->sel_fcf; | |
69316ee2 JE |
240 | |
241 | if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr)) | |
794d98e7 | 242 | goto unlock; |
69316ee2 JE |
243 | if (!is_zero_ether_addr(fip->dest_addr)) { |
244 | printk(KERN_NOTICE "libfcoe: host%d: " | |
245 | "FIP Fibre-Channel Forwarder MAC %pM deselected\n", | |
246 | fip->lp->host->host_no, fip->dest_addr); | |
247 | memset(fip->dest_addr, 0, ETH_ALEN); | |
248 | } | |
249 | if (sel) { | |
250 | printk(KERN_INFO "libfcoe: host%d: FIP selected " | |
251 | "Fibre-Channel Forwarder MAC %pM\n", | |
252 | fip->lp->host->host_no, sel->fcf_mac); | |
253 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); | |
254 | fip->map_dest = 0; | |
255 | } | |
794d98e7 JE |
256 | unlock: |
257 | mutex_unlock(&fip->ctlr_mutex); | |
69316ee2 JE |
258 | } |
259 | ||
97c8389d | 260 | /** |
70b51aab RL |
261 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
262 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
263 | * |
264 | * Returns the maximum packet size including the FCoE header and trailer, | |
265 | * but not including any Ethernet or VLAN headers. | |
266 | */ | |
267 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
268 | { | |
269 | /* | |
270 | * Determine the max FCoE frame size allowed, including | |
271 | * FCoE header and trailer. | |
272 | * Note: lp->mfs is currently the payload size, not the frame size. | |
273 | */ | |
274 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
275 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
276 | } | |
277 | ||
278 | /** | |
70b51aab RL |
279 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
280 | * @fip: The FCoE controller to send the solicitation on | |
281 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
282 | */ |
283 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
284 | { | |
285 | struct sk_buff *skb; | |
286 | struct fip_sol { | |
287 | struct ethhdr eth; | |
288 | struct fip_header fip; | |
289 | struct { | |
290 | struct fip_mac_desc mac; | |
291 | struct fip_wwn_desc wwnn; | |
292 | struct fip_size_desc size; | |
293 | } __attribute__((packed)) desc; | |
294 | } __attribute__((packed)) *sol; | |
295 | u32 fcoe_size; | |
296 | ||
297 | skb = dev_alloc_skb(sizeof(*sol)); | |
298 | if (!skb) | |
299 | return; | |
300 | ||
301 | sol = (struct fip_sol *)skb->data; | |
302 | ||
303 | memset(sol, 0, sizeof(*sol)); | |
304 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
305 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
306 | sol->eth.h_proto = htons(ETH_P_FIP); | |
307 | ||
308 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
309 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
310 | sol->fip.fip_subcode = FIP_SC_SOL; | |
311 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
312 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
313 | if (fip->spma) |
314 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
315 | |
316 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
317 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
318 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
319 | ||
320 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
321 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
322 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
323 | ||
324 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
325 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
326 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
327 | sol->desc.size.fd_size = htons(fcoe_size); | |
328 | ||
329 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 330 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
331 | skb_reset_mac_header(skb); |
332 | skb_reset_network_header(skb); | |
333 | fip->send(fip, skb); | |
334 | ||
335 | if (!fcf) | |
336 | fip->sol_time = jiffies; | |
337 | } | |
338 | ||
339 | /** | |
70b51aab RL |
340 | * fcoe_ctlr_link_up() - Start FCoE controller |
341 | * @fip: The FCoE controller to start | |
97c8389d JE |
342 | * |
343 | * Called from the LLD when the network link is ready. | |
344 | */ | |
345 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
346 | { | |
fdb068c6 | 347 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 348 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 349 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
350 | fc_linkup(fip->lp); |
351 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 352 | fcoe_ctlr_set_state(fip, fip->mode); |
e10f8c66 JE |
353 | switch (fip->mode) { |
354 | default: | |
355 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
356 | /* fall-through */ | |
357 | case FIP_MODE_AUTO: | |
0f51c2e5 | 358 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
359 | /* fall-through */ |
360 | case FIP_MODE_FABRIC: | |
361 | case FIP_MODE_NON_FIP: | |
362 | mutex_unlock(&fip->ctlr_mutex); | |
363 | fc_linkup(fip->lp); | |
364 | fcoe_ctlr_solicit(fip, NULL); | |
365 | break; | |
366 | case FIP_MODE_VN2VN: | |
367 | fcoe_ctlr_vn_start(fip); | |
368 | mutex_unlock(&fip->ctlr_mutex); | |
369 | fc_linkup(fip->lp); | |
370 | break; | |
371 | } | |
97c8389d | 372 | } else |
fdb068c6 | 373 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
374 | } |
375 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
376 | ||
377 | /** | |
70b51aab RL |
378 | * fcoe_ctlr_reset() - Reset a FCoE controller |
379 | * @fip: The FCoE controller to reset | |
97c8389d | 380 | */ |
dd42dac4 | 381 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 382 | { |
97c8389d JE |
383 | fcoe_ctlr_reset_fcfs(fip); |
384 | del_timer(&fip->timer); | |
97c8389d JE |
385 | fip->ctlr_ka_time = 0; |
386 | fip->port_ka_time = 0; | |
387 | fip->sol_time = 0; | |
388 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
cd229e42 | 389 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
390 | } |
391 | ||
392 | /** | |
70b51aab RL |
393 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
394 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
395 | * |
396 | * Returns non-zero if the link was up and now isn't. | |
397 | * | |
398 | * Called from the LLD when the network link is not ready. | |
399 | * There may be multiple calls while the link is down. | |
400 | */ | |
401 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
402 | { | |
dd42dac4 JE |
403 | int link_dropped; |
404 | ||
405 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 406 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 407 | fcoe_ctlr_reset(fip); |
42913657 | 408 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 409 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 410 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
411 | |
412 | if (link_dropped) | |
413 | fc_linkdown(fip->lp); | |
414 | return link_dropped; | |
97c8389d JE |
415 | } |
416 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
417 | ||
418 | /** | |
70b51aab RL |
419 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
420 | * @fip: The FCoE controller to send the FKA on | |
421 | * @lport: libfc fc_lport to send from | |
422 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
423 | * @sa: The source MAC address | |
97c8389d JE |
424 | * |
425 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
426 | * The source MAC is the native MAC address. | |
427 | * | |
428 | * A port keep-alive is sent every 90 seconds while logged in. | |
429 | * The source MAC is the assigned mapped source address. | |
430 | * The destination is the FCF's F-port. | |
431 | */ | |
11b56188 CL |
432 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
433 | struct fc_lport *lport, | |
434 | int ports, u8 *sa) | |
97c8389d JE |
435 | { |
436 | struct sk_buff *skb; | |
437 | struct fip_kal { | |
438 | struct ethhdr eth; | |
439 | struct fip_header fip; | |
440 | struct fip_mac_desc mac; | |
441 | } __attribute__((packed)) *kal; | |
442 | struct fip_vn_desc *vn; | |
443 | u32 len; | |
444 | struct fc_lport *lp; | |
445 | struct fcoe_fcf *fcf; | |
446 | ||
447 | fcf = fip->sel_fcf; | |
448 | lp = fip->lp; | |
281ae642 | 449 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
450 | return; |
451 | ||
be276cbe | 452 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
453 | skb = dev_alloc_skb(len); |
454 | if (!skb) | |
455 | return; | |
456 | ||
457 | kal = (struct fip_kal *)skb->data; | |
458 | memset(kal, 0, len); | |
459 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
460 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
461 | kal->eth.h_proto = htons(ETH_P_FIP); | |
462 | ||
463 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
464 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
465 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
466 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 467 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 468 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
469 | if (fip->spma) |
470 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
471 | |
472 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
473 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
474 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
475 | if (ports) { |
476 | vn = (struct fip_vn_desc *)(kal + 1); | |
477 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
478 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 479 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
480 | hton24(vn->fd_fc_id, lport->port_id); |
481 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 482 | } |
97c8389d | 483 | skb_put(skb, len); |
0f491539 | 484 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
485 | skb_reset_mac_header(skb); |
486 | skb_reset_network_header(skb); | |
487 | fip->send(fip, skb); | |
488 | } | |
489 | ||
490 | /** | |
70b51aab RL |
491 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
492 | * @fip: The FCoE controller for the ELS frame | |
493 | * @dtype: The FIP descriptor type for the frame | |
494 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 495 | * @d_id: The destination port ID. |
97c8389d JE |
496 | * |
497 | * Returns non-zero error code on failure. | |
498 | * | |
499 | * The caller must check that the length is a multiple of 4. | |
500 | * | |
501 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
502 | * Headroom includes the FIP encapsulation description, FIP header, and | |
503 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
504 | */ | |
11b56188 | 505 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 506 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
507 | { |
508 | struct fip_encaps_head { | |
509 | struct ethhdr eth; | |
510 | struct fip_header fip; | |
511 | struct fip_encaps encaps; | |
512 | } __attribute__((packed)) *cap; | |
5554345b | 513 | struct fc_frame_header *fh; |
97c8389d JE |
514 | struct fip_mac_desc *mac; |
515 | struct fcoe_fcf *fcf; | |
516 | size_t dlen; | |
5a84baea | 517 | u16 fip_flags; |
5554345b | 518 | u8 op; |
97c8389d | 519 | |
5554345b JE |
520 | fh = (struct fc_frame_header *)skb->data; |
521 | op = *(u8 *)(fh + 1); | |
97c8389d JE |
522 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
523 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
97c8389d | 524 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
525 | |
526 | if (lport->point_to_multipoint) { | |
527 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
528 | return -ENODEV; | |
5554345b | 529 | fip_flags = 0; |
e10f8c66 JE |
530 | } else { |
531 | fcf = fip->sel_fcf; | |
532 | if (!fcf) | |
533 | return -ENODEV; | |
534 | fip_flags = fcf->flags; | |
535 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
536 | FIP_FL_FPMA; | |
537 | if (!fip_flags) | |
538 | return -ENODEV; | |
539 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
540 | } | |
97c8389d JE |
541 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
542 | cap->eth.h_proto = htons(ETH_P_FIP); | |
543 | ||
544 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
545 | cap->fip.fip_op = htons(FIP_OP_LS); | |
5554345b JE |
546 | if (op == ELS_LS_ACC || op == ELS_LS_RJT) |
547 | cap->fip.fip_subcode = FIP_SC_REP; | |
548 | else | |
549 | cap->fip.fip_subcode = FIP_SC_REQ; | |
5a84baea | 550 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
551 | |
552 | cap->encaps.fd_desc.fip_dtype = dtype; | |
553 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
554 | ||
5554345b JE |
555 | if (op != ELS_LS_RJT) { |
556 | dlen += sizeof(*mac); | |
557 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
558 | memset(mac, 0, sizeof(*mac)); | |
559 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
560 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
561 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { | |
562 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); | |
563 | } else if (fip->mode == FIP_MODE_VN2VN) { | |
564 | hton24(mac->fd_mac, FIP_VN_FC_MAP); | |
565 | hton24(mac->fd_mac + 3, fip->port_id); | |
566 | } else if (fip_flags & FIP_FL_SPMA) { | |
567 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
568 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
569 | } else { | |
570 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
571 | /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ | |
572 | } | |
593abc07 | 573 | } |
5554345b | 574 | cap->fip.fip_dl_len = htons(dlen / FIP_BPW); |
97c8389d | 575 | |
0f491539 | 576 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
577 | skb_reset_mac_header(skb); |
578 | skb_reset_network_header(skb); | |
579 | return 0; | |
580 | } | |
581 | ||
582 | /** | |
583 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
584 | * @fip: FCoE controller. | |
11b56188 | 585 | * @lport: libfc fc_lport to send from |
97c8389d JE |
586 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
587 | * | |
588 | * Returns a non-zero error code if the frame should not be sent. | |
589 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
590 | * | |
591 | * The caller must check that the length is a multiple of 4. | |
592 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 593 | * The the skb must also be an fc_frame. |
794d98e7 JE |
594 | * |
595 | * This is called from the lower-level driver with spinlocks held, | |
596 | * so we must not take a mutex here. | |
97c8389d | 597 | */ |
11b56188 CL |
598 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
599 | struct sk_buff *skb) | |
97c8389d | 600 | { |
e10f8c66 | 601 | struct fc_frame *fp; |
97c8389d JE |
602 | struct fc_frame_header *fh; |
603 | u16 old_xid; | |
604 | u8 op; | |
11b56188 | 605 | u8 mac[ETH_ALEN]; |
97c8389d | 606 | |
e10f8c66 | 607 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
608 | fh = (struct fc_frame_header *)skb->data; |
609 | op = *(u8 *)(fh + 1); | |
610 | ||
e10f8c66 | 611 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
612 | old_xid = fip->flogi_oxid; |
613 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
614 | if (fip->state == FIP_ST_AUTO) { | |
615 | if (old_xid == FC_XID_UNKNOWN) | |
616 | fip->flogi_count = 0; | |
617 | fip->flogi_count++; | |
618 | if (fip->flogi_count < 3) | |
619 | goto drop; | |
cd229e42 | 620 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
621 | return 0; |
622 | } | |
5f48f70e | 623 | if (fip->state == FIP_ST_NON_FIP) |
cd229e42 | 624 | fcoe_ctlr_map_dest(fip); |
5f48f70e JE |
625 | } |
626 | ||
627 | if (fip->state == FIP_ST_NON_FIP) | |
628 | return 0; | |
e10f8c66 | 629 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 630 | goto drop; |
5f48f70e JE |
631 | switch (op) { |
632 | case ELS_FLOGI: | |
97c8389d | 633 | op = FIP_DT_FLOGI; |
794d98e7 JE |
634 | if (fip->mode == FIP_MODE_VN2VN) |
635 | break; | |
636 | spin_lock_bh(&fip->ctlr_lock); | |
637 | kfree_skb(fip->flogi_req); | |
638 | fip->flogi_req = skb; | |
639 | fip->flogi_req_send = 1; | |
640 | spin_unlock_bh(&fip->ctlr_lock); | |
641 | schedule_work(&fip->timer_work); | |
642 | return -EINPROGRESS; | |
97c8389d JE |
643 | case ELS_FDISC: |
644 | if (ntoh24(fh->fh_s_id)) | |
645 | return 0; | |
646 | op = FIP_DT_FDISC; | |
647 | break; | |
648 | case ELS_LOGO: | |
e10f8c66 JE |
649 | if (fip->mode == FIP_MODE_VN2VN) { |
650 | if (fip->state != FIP_ST_VNMP_UP) | |
651 | return -EINVAL; | |
652 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) | |
653 | return -EINVAL; | |
654 | } else { | |
655 | if (fip->state != FIP_ST_ENABLED) | |
656 | return 0; | |
657 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
658 | return 0; | |
659 | } | |
97c8389d JE |
660 | op = FIP_DT_LOGO; |
661 | break; | |
662 | case ELS_LS_ACC: | |
97c8389d | 663 | /* |
e10f8c66 | 664 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
665 | * from a point-to-point connection. Switch to using |
666 | * the source mac based on the SID. The destination | |
667 | * MAC in this case would have been set by receving the | |
668 | * FLOGI. | |
669 | */ | |
e10f8c66 JE |
670 | if (fip->state == FIP_ST_NON_FIP) { |
671 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
672 | return 0; | |
673 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
674 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
675 | fip->update_mac(lport, mac); | |
676 | } | |
677 | /* fall through */ | |
678 | case ELS_LS_RJT: | |
679 | op = fr_encaps(fp); | |
680 | if (op) | |
681 | break; | |
97c8389d JE |
682 | return 0; |
683 | default: | |
e10f8c66 JE |
684 | if (fip->state != FIP_ST_ENABLED && |
685 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
686 | goto drop; |
687 | return 0; | |
688 | } | |
e10f8c66 JE |
689 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
690 | op, ntoh24(fh->fh_d_id)); | |
691 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
692 | goto drop; |
693 | fip->send(fip, skb); | |
694 | return -EINPROGRESS; | |
695 | drop: | |
696 | kfree_skb(skb); | |
697 | return -EINVAL; | |
698 | } | |
699 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
700 | ||
70b51aab RL |
701 | /** |
702 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
703 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 704 | * |
f018b73a | 705 | * Called with lock held and preemption disabled. |
97c8389d | 706 | * |
8690cb83 JE |
707 | * An FCF is considered old if we have missed two advertisements. |
708 | * That is, there have been no valid advertisement from it for 2.5 | |
709 | * times its keep-alive period. | |
97c8389d JE |
710 | * |
711 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
712 | * |
713 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
714 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
715 | * |
716 | * Returns the time in jiffies for the next call. | |
97c8389d | 717 | */ |
8690cb83 | 718 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
719 | { |
720 | struct fcoe_fcf *fcf; | |
721 | struct fcoe_fcf *next; | |
8690cb83 JE |
722 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
723 | unsigned long deadline; | |
97c8389d | 724 | unsigned long sel_time = 0; |
f018b73a | 725 | struct fcoe_dev_stats *stats; |
97c8389d | 726 | |
fdb068c6 JE |
727 | stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); |
728 | ||
97c8389d | 729 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
730 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
731 | if (fip->sel_fcf == fcf) { | |
732 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
733 | stats->MissDiscAdvCount++; |
734 | printk(KERN_INFO "libfcoe: host%d: " | |
735 | "Missing Discovery Advertisement " | |
736 | "for fab %16.16llx count %lld\n", | |
737 | fip->lp->host->host_no, fcf->fabric_name, | |
738 | stats->MissDiscAdvCount); | |
739 | } else if (time_after(next_timer, deadline)) | |
740 | next_timer = deadline; | |
f3da80e7 | 741 | } |
8690cb83 JE |
742 | |
743 | deadline += fcf->fka_period; | |
d99ee45b | 744 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
745 | if (fip->sel_fcf == fcf) |
746 | fip->sel_fcf = NULL; | |
747 | list_del(&fcf->list); | |
748 | WARN_ON(!fip->fcf_count); | |
749 | fip->fcf_count--; | |
750 | kfree(fcf); | |
f018b73a | 751 | stats->VLinkFailureCount++; |
8690cb83 JE |
752 | } else { |
753 | if (time_after(next_timer, deadline)) | |
754 | next_timer = deadline; | |
755 | if (fcoe_ctlr_mtu_valid(fcf) && | |
756 | (!sel_time || time_before(sel_time, fcf->time))) | |
757 | sel_time = fcf->time; | |
97c8389d JE |
758 | } |
759 | } | |
fdb068c6 | 760 | put_cpu(); |
d99ee45b | 761 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
762 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
763 | fip->sel_time = sel_time; | |
97c8389d | 764 | } |
d99ee45b | 765 | |
8690cb83 | 766 | return next_timer; |
97c8389d JE |
767 | } |
768 | ||
769 | /** | |
70b51aab | 770 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 771 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
772 | * @skb: The received FIP advertisement frame |
773 | * @fcf: The resulting FCF entry | |
97c8389d JE |
774 | * |
775 | * Returns zero on a valid parsed advertisement, | |
776 | * otherwise returns non zero value. | |
777 | */ | |
0f51c2e5 JE |
778 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
779 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
780 | { |
781 | struct fip_header *fiph; | |
782 | struct fip_desc *desc = NULL; | |
783 | struct fip_wwn_desc *wwn; | |
784 | struct fip_fab_desc *fab; | |
785 | struct fip_fka_desc *fka; | |
786 | unsigned long t; | |
787 | size_t rlen; | |
788 | size_t dlen; | |
0a9c5d34 | 789 | u32 desc_mask; |
97c8389d JE |
790 | |
791 | memset(fcf, 0, sizeof(*fcf)); | |
792 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
793 | ||
794 | fiph = (struct fip_header *)skb->data; | |
795 | fcf->flags = ntohs(fiph->fip_flags); | |
796 | ||
0a9c5d34 BPG |
797 | /* |
798 | * mask of required descriptors. validating each one clears its bit. | |
799 | */ | |
800 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
801 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
802 | ||
97c8389d JE |
803 | rlen = ntohs(fiph->fip_dl_len) * 4; |
804 | if (rlen + sizeof(*fiph) > skb->len) | |
805 | return -EINVAL; | |
806 | ||
807 | desc = (struct fip_desc *)(fiph + 1); | |
808 | while (rlen > 0) { | |
809 | dlen = desc->fip_dlen * FIP_BPW; | |
810 | if (dlen < sizeof(*desc) || dlen > rlen) | |
811 | return -EINVAL; | |
0a9c5d34 BPG |
812 | /* Drop Adv if there are duplicate critical descriptors */ |
813 | if ((desc->fip_dtype < 32) && | |
814 | !(desc_mask & 1U << desc->fip_dtype)) { | |
815 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
816 | "Descriptors in FIP adv\n"); | |
817 | return -EINVAL; | |
818 | } | |
97c8389d JE |
819 | switch (desc->fip_dtype) { |
820 | case FIP_DT_PRI: | |
821 | if (dlen != sizeof(struct fip_pri_desc)) | |
822 | goto len_err; | |
823 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 824 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
825 | break; |
826 | case FIP_DT_MAC: | |
827 | if (dlen != sizeof(struct fip_mac_desc)) | |
828 | goto len_err; | |
829 | memcpy(fcf->fcf_mac, | |
830 | ((struct fip_mac_desc *)desc)->fd_mac, | |
831 | ETH_ALEN); | |
832 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
e10f8c66 JE |
833 | LIBFCOE_FIP_DBG(fip, |
834 | "Invalid MAC addr %pM in FIP adv\n", | |
835 | fcf->fcf_mac); | |
97c8389d JE |
836 | return -EINVAL; |
837 | } | |
0a9c5d34 | 838 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
839 | break; |
840 | case FIP_DT_NAME: | |
841 | if (dlen != sizeof(struct fip_wwn_desc)) | |
842 | goto len_err; | |
843 | wwn = (struct fip_wwn_desc *)desc; | |
844 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 845 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
846 | break; |
847 | case FIP_DT_FAB: | |
848 | if (dlen != sizeof(struct fip_fab_desc)) | |
849 | goto len_err; | |
850 | fab = (struct fip_fab_desc *)desc; | |
851 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
852 | fcf->vfid = ntohs(fab->fd_vfid); | |
853 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 854 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
855 | break; |
856 | case FIP_DT_FKA: | |
857 | if (dlen != sizeof(struct fip_fka_desc)) | |
858 | goto len_err; | |
859 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
860 | if (fka->fd_flags & FIP_FKA_ADV_D) |
861 | fcf->fd_flags = 1; | |
97c8389d JE |
862 | t = ntohl(fka->fd_fka_period); |
863 | if (t >= FCOE_CTLR_MIN_FKA) | |
864 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 865 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
866 | break; |
867 | case FIP_DT_MAP_OUI: | |
868 | case FIP_DT_FCOE_SIZE: | |
869 | case FIP_DT_FLOGI: | |
870 | case FIP_DT_FDISC: | |
871 | case FIP_DT_LOGO: | |
872 | case FIP_DT_ELP: | |
873 | default: | |
0f51c2e5 | 874 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 875 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
876 | /* standard says ignore unknown descriptors >= 128 */ |
877 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
878 | return -EINVAL; | |
1508f3ec | 879 | break; |
97c8389d JE |
880 | } |
881 | desc = (struct fip_desc *)((char *)desc + dlen); | |
882 | rlen -= dlen; | |
883 | } | |
884 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
885 | return -EINVAL; | |
240778e8 | 886 | if (!fcf->switch_name) |
97c8389d | 887 | return -EINVAL; |
0a9c5d34 BPG |
888 | if (desc_mask) { |
889 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
890 | desc_mask); | |
891 | return -EINVAL; | |
892 | } | |
97c8389d JE |
893 | return 0; |
894 | ||
895 | len_err: | |
0f51c2e5 | 896 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 897 | desc->fip_dtype, dlen); |
97c8389d JE |
898 | return -EINVAL; |
899 | } | |
900 | ||
901 | /** | |
70b51aab RL |
902 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
903 | * @fip: The FCoE controller receiving the advertisement | |
904 | * @skb: The received FIP packet | |
97c8389d JE |
905 | */ |
906 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
907 | { | |
908 | struct fcoe_fcf *fcf; | |
909 | struct fcoe_fcf new; | |
910 | struct fcoe_fcf *found; | |
911 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
912 | int first = 0; | |
913 | int mtu_valid; | |
914 | ||
0f51c2e5 | 915 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
916 | return; |
917 | ||
fdb068c6 | 918 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
919 | first = list_empty(&fip->fcfs); |
920 | found = NULL; | |
921 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
922 | if (fcf->switch_name == new.switch_name && | |
923 | fcf->fabric_name == new.fabric_name && | |
924 | fcf->fc_map == new.fc_map && | |
925 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
926 | found = fcf; | |
927 | break; | |
928 | } | |
929 | } | |
930 | if (!found) { | |
931 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
932 | goto out; | |
933 | ||
934 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
935 | if (!fcf) | |
936 | goto out; | |
937 | ||
938 | fip->fcf_count++; | |
939 | memcpy(fcf, &new, sizeof(new)); | |
940 | list_add(&fcf->list, &fip->fcfs); | |
941 | } else { | |
942 | /* | |
c600fea2 JE |
943 | * Update the FCF's keep-alive descriptor flags. |
944 | * Other flag changes from new advertisements are | |
945 | * ignored after a solicited advertisement is | |
946 | * received and the FCF is selectable (usable). | |
97c8389d | 947 | */ |
c600fea2 JE |
948 | fcf->fd_flags = new.fd_flags; |
949 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
950 | fcf->flags = new.flags; | |
951 | ||
d99ee45b | 952 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
953 | fip->ctlr_ka_time -= fcf->fka_period; |
954 | fip->ctlr_ka_time += new.fka_period; | |
955 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
956 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 957 | } |
97c8389d JE |
958 | fcf->fka_period = new.fka_period; |
959 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
960 | } | |
961 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
962 | fcf->time = jiffies; | |
9069f5c4 JE |
963 | if (!found) |
964 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
965 | fcf->fabric_name, fcf->fcf_mac); | |
97c8389d JE |
966 | |
967 | /* | |
968 | * If this advertisement is not solicited and our max receive size | |
969 | * hasn't been verified, send a solicited advertisement. | |
970 | */ | |
971 | if (!mtu_valid) | |
972 | fcoe_ctlr_solicit(fip, fcf); | |
973 | ||
974 | /* | |
975 | * If its been a while since we did a solicit, and this is | |
976 | * the first advertisement we've received, do a multicast | |
977 | * solicitation to gather as many advertisements as we can | |
978 | * before selection occurs. | |
979 | */ | |
980 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
981 | fcoe_ctlr_solicit(fip, NULL); | |
982 | ||
981c1154 JE |
983 | /* |
984 | * Put this FCF at the head of the list for priority among equals. | |
985 | * This helps in the case of an NPV switch which insists we use | |
986 | * the FCF that answers multicast solicitations, not the others that | |
987 | * are sending periodic multicast advertisements. | |
988 | */ | |
989 | if (mtu_valid) { | |
990 | list_del(&fcf->list); | |
991 | list_add(&fcf->list, &fip->fcfs); | |
992 | } | |
993 | ||
97c8389d JE |
994 | /* |
995 | * If this is the first validated FCF, note the time and | |
996 | * set a timer to trigger selection. | |
997 | */ | |
d99ee45b | 998 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 999 | fip->sel_time = jiffies + |
70b51aab | 1000 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1001 | if (!timer_pending(&fip->timer) || |
1002 | time_before(fip->sel_time, fip->timer.expires)) | |
1003 | mod_timer(&fip->timer, fip->sel_time); | |
1004 | } | |
1005 | out: | |
fdb068c6 | 1006 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1007 | } |
1008 | ||
1009 | /** | |
70b51aab RL |
1010 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
1011 | * @fip: The FCoE controller which received the packet | |
1012 | * @skb: The received FIP packet | |
97c8389d JE |
1013 | */ |
1014 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1015 | { | |
70b51aab | 1016 | struct fc_lport *lport = fip->lp; |
97c8389d | 1017 | struct fip_header *fiph; |
11b56188 | 1018 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
1019 | struct fc_frame_header *fh = NULL; |
1020 | struct fip_desc *desc; | |
1021 | struct fip_encaps *els; | |
1022 | struct fcoe_dev_stats *stats; | |
1023 | enum fip_desc_type els_dtype = 0; | |
1024 | u8 els_op; | |
1025 | u8 sub; | |
1026 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
1027 | size_t els_len = 0; | |
1028 | size_t rlen; | |
1029 | size_t dlen; | |
be61331d BPG |
1030 | u32 desc_mask = 0; |
1031 | u32 desc_cnt = 0; | |
97c8389d JE |
1032 | |
1033 | fiph = (struct fip_header *)skb->data; | |
1034 | sub = fiph->fip_subcode; | |
1035 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
1036 | goto drop; | |
1037 | ||
1038 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1039 | if (rlen + sizeof(*fiph) > skb->len) | |
1040 | goto drop; | |
1041 | ||
1042 | desc = (struct fip_desc *)(fiph + 1); | |
1043 | while (rlen > 0) { | |
be61331d | 1044 | desc_cnt++; |
97c8389d JE |
1045 | dlen = desc->fip_dlen * FIP_BPW; |
1046 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1047 | goto drop; | |
0a9c5d34 BPG |
1048 | /* Drop ELS if there are duplicate critical descriptors */ |
1049 | if (desc->fip_dtype < 32) { | |
be61331d | 1050 | if (desc_mask & 1U << desc->fip_dtype) { |
0a9c5d34 BPG |
1051 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
1052 | "Descriptors in FIP ELS\n"); | |
1053 | goto drop; | |
1054 | } | |
be61331d | 1055 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 1056 | } |
97c8389d JE |
1057 | switch (desc->fip_dtype) { |
1058 | case FIP_DT_MAC: | |
be61331d BPG |
1059 | if (desc_cnt == 1) { |
1060 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1061 | "received out of order\n"); | |
1062 | goto drop; | |
1063 | } | |
1064 | ||
97c8389d JE |
1065 | if (dlen != sizeof(struct fip_mac_desc)) |
1066 | goto len_err; | |
1067 | memcpy(granted_mac, | |
1068 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1069 | ETH_ALEN); | |
97c8389d JE |
1070 | break; |
1071 | case FIP_DT_FLOGI: | |
1072 | case FIP_DT_FDISC: | |
1073 | case FIP_DT_LOGO: | |
1074 | case FIP_DT_ELP: | |
be61331d BPG |
1075 | if (desc_cnt != 1) { |
1076 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1077 | "received out of order\n"); | |
1078 | goto drop; | |
1079 | } | |
97c8389d JE |
1080 | if (fh) |
1081 | goto drop; | |
1082 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1083 | goto len_err; | |
1084 | els_len = dlen - sizeof(*els); | |
1085 | els = (struct fip_encaps *)desc; | |
1086 | fh = (struct fc_frame_header *)(els + 1); | |
1087 | els_dtype = desc->fip_dtype; | |
1088 | break; | |
1089 | default: | |
0f51c2e5 | 1090 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1091 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
1092 | /* standard says ignore unknown descriptors >= 128 */ |
1093 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1094 | goto drop; | |
be61331d BPG |
1095 | if (desc_cnt <= 2) { |
1096 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1097 | "received out of order\n"); | |
1098 | goto drop; | |
1099 | } | |
1508f3ec | 1100 | break; |
97c8389d JE |
1101 | } |
1102 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1103 | rlen -= dlen; | |
1104 | } | |
1105 | ||
1106 | if (!fh) | |
1107 | goto drop; | |
1108 | els_op = *(u8 *)(fh + 1); | |
1109 | ||
e10f8c66 | 1110 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
794d98e7 JE |
1111 | sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { |
1112 | if (els_op == ELS_LS_ACC) { | |
1113 | if (!is_valid_ether_addr(granted_mac)) { | |
1114 | LIBFCOE_FIP_DBG(fip, | |
1115 | "Invalid MAC address %pM in FIP ELS\n", | |
1116 | granted_mac); | |
1117 | goto drop; | |
1118 | } | |
1119 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
e10f8c66 | 1120 | |
794d98e7 JE |
1121 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
1122 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1123 | if (els_dtype == FIP_DT_FLOGI) | |
1124 | fcoe_ctlr_announce(fip); | |
1125 | } | |
1126 | } else if (els_dtype == FIP_DT_FLOGI && | |
1127 | !fcoe_ctlr_flogi_retry(fip)) | |
1128 | goto drop; /* retrying FLOGI so drop reject */ | |
e10f8c66 | 1129 | } |
97c8389d | 1130 | |
be61331d BPG |
1131 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1132 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1133 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1134 | "in FIP ELS\n"); | |
1135 | goto drop; | |
1136 | } | |
1137 | ||
97c8389d JE |
1138 | /* |
1139 | * Convert skb into an fc_frame containing only the ELS. | |
1140 | */ | |
1141 | skb_pull(skb, (u8 *)fh - skb->data); | |
1142 | skb_trim(skb, els_len); | |
1143 | fp = (struct fc_frame *)skb; | |
1144 | fc_frame_init(fp); | |
1145 | fr_sof(fp) = FC_SOF_I3; | |
1146 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1147 | fr_dev(fp) = lport; |
e10f8c66 | 1148 | fr_encaps(fp) = els_dtype; |
97c8389d | 1149 | |
f018b73a | 1150 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d JE |
1151 | stats->RxFrames++; |
1152 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1153 | put_cpu(); |
97c8389d | 1154 | |
70b51aab | 1155 | fc_exch_recv(lport, fp); |
97c8389d JE |
1156 | return; |
1157 | ||
1158 | len_err: | |
0f51c2e5 | 1159 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1160 | desc->fip_dtype, dlen); |
97c8389d JE |
1161 | drop: |
1162 | kfree_skb(skb); | |
1163 | } | |
1164 | ||
1165 | /** | |
70b51aab RL |
1166 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1167 | * @fip: The FCoE controller that received the frame | |
1168 | * @fh: The received FIP header | |
97c8389d JE |
1169 | * |
1170 | * There may be multiple VN_Port descriptors. | |
1171 | * The overall length has already been checked. | |
1172 | */ | |
1173 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1174 | struct fip_header *fh) |
97c8389d JE |
1175 | { |
1176 | struct fip_desc *desc; | |
1177 | struct fip_mac_desc *mp; | |
1178 | struct fip_wwn_desc *wp; | |
1179 | struct fip_vn_desc *vp; | |
1180 | size_t rlen; | |
1181 | size_t dlen; | |
1182 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1183 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1184 | struct fc_lport *vn_port = NULL; |
1185 | u32 desc_mask; | |
1186 | int is_vn_port = 0; | |
97c8389d | 1187 | |
0f51c2e5 | 1188 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1189 | |
7b2787ec | 1190 | if (!fcf || !lport->port_id) |
97c8389d JE |
1191 | return; |
1192 | ||
1193 | /* | |
1194 | * mask of required descriptors. Validating each one clears its bit. | |
1195 | */ | |
1196 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
1197 | ||
1198 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1199 | desc = (struct fip_desc *)(fh + 1); | |
1200 | while (rlen >= sizeof(*desc)) { | |
1201 | dlen = desc->fip_dlen * FIP_BPW; | |
1202 | if (dlen > rlen) | |
1203 | return; | |
0a9c5d34 BPG |
1204 | /* Drop CVL if there are duplicate critical descriptors */ |
1205 | if ((desc->fip_dtype < 32) && | |
1206 | !(desc_mask & 1U << desc->fip_dtype)) { | |
1207 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1208 | "Descriptors in FIP CVL\n"); | |
1209 | return; | |
1210 | } | |
97c8389d JE |
1211 | switch (desc->fip_dtype) { |
1212 | case FIP_DT_MAC: | |
1213 | mp = (struct fip_mac_desc *)desc; | |
1214 | if (dlen < sizeof(*mp)) | |
1215 | return; | |
1216 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
1217 | return; | |
1218 | desc_mask &= ~BIT(FIP_DT_MAC); | |
1219 | break; | |
1220 | case FIP_DT_NAME: | |
1221 | wp = (struct fip_wwn_desc *)desc; | |
1222 | if (dlen < sizeof(*wp)) | |
1223 | return; | |
1224 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
1225 | return; | |
1226 | desc_mask &= ~BIT(FIP_DT_NAME); | |
1227 | break; | |
1228 | case FIP_DT_VN_ID: | |
1229 | vp = (struct fip_vn_desc *)desc; | |
1230 | if (dlen < sizeof(*vp)) | |
1231 | return; | |
1232 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
1233 | fip->get_src_addr(lport)) == 0 && |
1234 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
5550fda7 | 1235 | ntoh24(vp->fd_fc_id) == lport->port_id) { |
97c8389d | 1236 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
5550fda7 BPG |
1237 | break; |
1238 | } | |
1239 | /* check if clr_vlink is for NPIV port */ | |
1240 | mutex_lock(&lport->lp_mutex); | |
1241 | list_for_each_entry(vn_port, &lport->vports, list) { | |
1242 | if (compare_ether_addr(vp->fd_mac, | |
1243 | fip->get_src_addr(vn_port)) == 0 && | |
1244 | (get_unaligned_be64(&vp->fd_wwpn) | |
1245 | == vn_port->wwpn) && | |
1246 | (ntoh24(vp->fd_fc_id) == | |
1247 | fc_host_port_id(vn_port->host))) { | |
1248 | desc_mask &= ~BIT(FIP_DT_VN_ID); | |
1249 | is_vn_port = 1; | |
1250 | break; | |
1251 | } | |
1252 | } | |
1253 | mutex_unlock(&lport->lp_mutex); | |
1254 | ||
97c8389d JE |
1255 | break; |
1256 | default: | |
1257 | /* standard says ignore unknown descriptors >= 128 */ | |
1258 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1259 | return; | |
1260 | break; | |
1261 | } | |
1262 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1263 | rlen -= dlen; | |
1264 | } | |
1265 | ||
1266 | /* | |
1267 | * reset only if all required descriptors were present and valid. | |
1268 | */ | |
1269 | if (desc_mask) { | |
0f51c2e5 JE |
1270 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1271 | desc_mask); | |
97c8389d | 1272 | } else { |
0f51c2e5 | 1273 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 | 1274 | |
5550fda7 BPG |
1275 | if (is_vn_port) |
1276 | fc_lport_reset(vn_port); | |
1277 | else { | |
fdb068c6 | 1278 | mutex_lock(&fip->ctlr_mutex); |
5550fda7 | 1279 | per_cpu_ptr(lport->dev_stats, |
fdb068c6 JE |
1280 | get_cpu())->VLinkFailureCount++; |
1281 | put_cpu(); | |
5550fda7 | 1282 | fcoe_ctlr_reset(fip); |
fdb068c6 | 1283 | mutex_unlock(&fip->ctlr_mutex); |
5550fda7 BPG |
1284 | |
1285 | fc_lport_reset(fip->lp); | |
1286 | fcoe_ctlr_solicit(fip, NULL); | |
1287 | } | |
97c8389d JE |
1288 | } |
1289 | } | |
1290 | ||
1291 | /** | |
70b51aab RL |
1292 | * fcoe_ctlr_recv() - Receive a FIP packet |
1293 | * @fip: The FCoE controller that received the packet | |
1294 | * @skb: The received FIP packet | |
97c8389d | 1295 | * |
1f4aed81 | 1296 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1297 | */ |
1298 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1299 | { | |
1f4aed81 | 1300 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1301 | schedule_work(&fip->recv_work); |
1302 | } | |
1303 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1304 | ||
1305 | /** | |
70b51aab RL |
1306 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1307 | * @fip: The FCoE controller that received the frame | |
1308 | * @skb: The received FIP frame | |
97c8389d JE |
1309 | * |
1310 | * Returns non-zero if the frame is dropped. | |
1311 | */ | |
1312 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1313 | { | |
1314 | struct fip_header *fiph; | |
1315 | struct ethhdr *eh; | |
1316 | enum fip_state state; | |
1317 | u16 op; | |
1318 | u8 sub; | |
1319 | ||
1320 | if (skb_linearize(skb)) | |
1321 | goto drop; | |
1322 | if (skb->len < sizeof(*fiph)) | |
1323 | goto drop; | |
1324 | eh = eth_hdr(skb); | |
e10f8c66 JE |
1325 | if (fip->mode == FIP_MODE_VN2VN) { |
1326 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1327 | compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && | |
1328 | compare_ether_addr(eh->h_dest, fcoe_all_p2p)) | |
1329 | goto drop; | |
1330 | } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1331 | compare_ether_addr(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1332 | goto drop; |
1333 | fiph = (struct fip_header *)skb->data; | |
1334 | op = ntohs(fiph->fip_op); | |
1335 | sub = fiph->fip_subcode; | |
1336 | ||
97c8389d JE |
1337 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1338 | goto drop; | |
1339 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1340 | goto drop; | |
1341 | ||
fdb068c6 | 1342 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1343 | state = fip->state; |
1344 | if (state == FIP_ST_AUTO) { | |
1345 | fip->map_dest = 0; | |
9b651da9 | 1346 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1347 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1348 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1349 | } |
fdb068c6 | 1350 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1351 | |
1352 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1353 | return fcoe_ctlr_vn_recv(fip, skb); | |
1354 | ||
1355 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && | |
1356 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1357 | goto drop; |
1358 | ||
1359 | if (op == FIP_OP_LS) { | |
1360 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1361 | return 0; | |
1362 | } | |
e10f8c66 JE |
1363 | |
1364 | if (state != FIP_ST_ENABLED) | |
1365 | goto drop; | |
1366 | ||
97c8389d JE |
1367 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1368 | fcoe_ctlr_recv_adv(fip, skb); | |
1369 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1370 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1371 | kfree_skb(skb); | |
1372 | return 0; | |
1373 | drop: | |
1374 | kfree_skb(skb); | |
1375 | return -1; | |
1376 | } | |
1377 | ||
1378 | /** | |
70b51aab RL |
1379 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1380 | * @fip: The FCoE controller | |
97c8389d | 1381 | * |
ba9cd5d0 JE |
1382 | * Returns the selected FCF, or NULL if none are usable. |
1383 | * | |
97c8389d JE |
1384 | * If there are conflicting advertisements, no FCF can be chosen. |
1385 | * | |
794d98e7 JE |
1386 | * If there is already a selected FCF, this will choose a better one or |
1387 | * an equivalent one that hasn't already been sent a FLOGI. | |
1388 | * | |
97c8389d JE |
1389 | * Called with lock held. |
1390 | */ | |
ba9cd5d0 | 1391 | static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) |
97c8389d JE |
1392 | { |
1393 | struct fcoe_fcf *fcf; | |
794d98e7 | 1394 | struct fcoe_fcf *best = fip->sel_fcf; |
b69ae0ae JE |
1395 | struct fcoe_fcf *first; |
1396 | ||
1397 | first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list); | |
97c8389d JE |
1398 | |
1399 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9069f5c4 JE |
1400 | LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " |
1401 | "VFID %d mac %pM map %x val %d " | |
1402 | "sent %u pri %u\n", | |
1403 | fcf->fabric_name, fcf->vfid, fcf->fcf_mac, | |
1404 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), | |
1405 | fcf->flogi_sent, fcf->pri); | |
b69ae0ae JE |
1406 | if (fcf->fabric_name != first->fabric_name || |
1407 | fcf->vfid != first->vfid || | |
1408 | fcf->fc_map != first->fc_map) { | |
1409 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " | |
1410 | "or FC-MAP\n"); | |
1411 | return NULL; | |
1412 | } | |
794d98e7 JE |
1413 | if (fcf->flogi_sent) |
1414 | continue; | |
97c8389d | 1415 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1416 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1417 | "map %x %svalid %savailable\n", | |
1418 | fcf->fabric_name, fcf->fc_map, | |
1419 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1420 | (fcf->flags & FIP_FL_AVAIL) ? | |
1421 | "" : "un"); | |
97c8389d JE |
1422 | continue; |
1423 | } | |
794d98e7 | 1424 | if (!best || fcf->pri < best->pri || best->flogi_sent) |
97c8389d JE |
1425 | best = fcf; |
1426 | } | |
1427 | fip->sel_fcf = best; | |
c47036a7 | 1428 | if (best) { |
9069f5c4 | 1429 | LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); |
c47036a7 JE |
1430 | fip->port_ka_time = jiffies + |
1431 | msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
1432 | fip->ctlr_ka_time = jiffies + best->fka_period; | |
1433 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1434 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
1435 | } | |
ba9cd5d0 | 1436 | return best; |
97c8389d JE |
1437 | } |
1438 | ||
794d98e7 JE |
1439 | /** |
1440 | * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF | |
1441 | * @fip: The FCoE controller | |
1442 | * | |
1443 | * Returns non-zero error if it could not be sent. | |
1444 | * | |
1445 | * Called with ctlr_mutex and ctlr_lock held. | |
1446 | * Caller must verify that fip->sel_fcf is not NULL. | |
1447 | */ | |
1448 | static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) | |
1449 | { | |
1450 | struct sk_buff *skb; | |
1451 | struct sk_buff *skb_orig; | |
1452 | struct fc_frame_header *fh; | |
1453 | int error; | |
1454 | ||
1455 | skb_orig = fip->flogi_req; | |
1456 | if (!skb_orig) | |
1457 | return -EINVAL; | |
1458 | ||
1459 | /* | |
1460 | * Clone and send the FLOGI request. If clone fails, use original. | |
1461 | */ | |
1462 | skb = skb_clone(skb_orig, GFP_ATOMIC); | |
1463 | if (!skb) { | |
1464 | skb = skb_orig; | |
1465 | fip->flogi_req = NULL; | |
1466 | } | |
1467 | fh = (struct fc_frame_header *)skb->data; | |
1468 | error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, | |
1469 | ntoh24(fh->fh_d_id)); | |
1470 | if (error) { | |
1471 | kfree_skb(skb); | |
1472 | return error; | |
1473 | } | |
1474 | fip->send(fip, skb); | |
1475 | fip->sel_fcf->flogi_sent = 1; | |
1476 | return 0; | |
1477 | } | |
1478 | ||
1479 | /** | |
1480 | * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible | |
1481 | * @fip: The FCoE controller | |
1482 | * | |
1483 | * Returns non-zero error code if there's no FLOGI request to retry or | |
1484 | * no alternate FCF available. | |
1485 | */ | |
1486 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) | |
1487 | { | |
1488 | struct fcoe_fcf *fcf; | |
1489 | int error; | |
1490 | ||
1491 | mutex_lock(&fip->ctlr_mutex); | |
1492 | spin_lock_bh(&fip->ctlr_lock); | |
1493 | LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1494 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1495 | if (!fcf || fcf->flogi_sent) { |
1496 | kfree_skb(fip->flogi_req); | |
1497 | fip->flogi_req = NULL; | |
1498 | error = -ENOENT; | |
1499 | } else { | |
1500 | fcoe_ctlr_solicit(fip, NULL); | |
1501 | error = fcoe_ctlr_flogi_send_locked(fip); | |
1502 | } | |
1503 | spin_unlock_bh(&fip->ctlr_lock); | |
1504 | mutex_unlock(&fip->ctlr_mutex); | |
1505 | return error; | |
1506 | } | |
1507 | ||
1508 | ||
1509 | /** | |
1510 | * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. | |
1511 | * @fip: The FCoE controller that timed out | |
1512 | * | |
1513 | * Done here because fcoe_ctlr_els_send() can't get mutex. | |
1514 | * | |
1515 | * Called with ctlr_mutex held. The caller must not hold ctlr_lock. | |
1516 | */ | |
1517 | static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) | |
1518 | { | |
1519 | struct fcoe_fcf *fcf; | |
1520 | ||
1521 | spin_lock_bh(&fip->ctlr_lock); | |
1522 | fcf = fip->sel_fcf; | |
1523 | if (!fcf || !fip->flogi_req_send) | |
1524 | goto unlock; | |
1525 | ||
1526 | LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); | |
1527 | ||
1528 | /* | |
1529 | * If this FLOGI is being sent due to a timeout retry | |
1530 | * to the same FCF as before, select a different FCF if possible. | |
1531 | */ | |
1532 | if (fcf->flogi_sent) { | |
1533 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1534 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1535 | if (!fcf || fcf->flogi_sent) { |
1536 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); | |
1537 | list_for_each_entry(fcf, &fip->fcfs, list) | |
1538 | fcf->flogi_sent = 0; | |
ba9cd5d0 | 1539 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1540 | } |
1541 | } | |
1542 | if (fcf) { | |
1543 | fcoe_ctlr_flogi_send_locked(fip); | |
1544 | fip->flogi_req_send = 0; | |
1545 | } else /* XXX */ | |
1546 | LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); | |
1547 | unlock: | |
1548 | spin_unlock_bh(&fip->ctlr_lock); | |
1549 | } | |
1550 | ||
97c8389d | 1551 | /** |
70b51aab RL |
1552 | * fcoe_ctlr_timeout() - FIP timeout handler |
1553 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1554 | */ |
1555 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1556 | { | |
1557 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1558 | |
1559 | schedule_work(&fip->timer_work); | |
1560 | } | |
1561 | ||
1562 | /** | |
1563 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1564 | * @work: Handle to a FCoE controller | |
1565 | * | |
1566 | * Ages FCFs. Triggers FCF selection if possible. | |
1567 | * Sends keep-alives and resets. | |
1568 | */ | |
1569 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1570 | { | |
1571 | struct fcoe_ctlr *fip; | |
1572 | struct fc_lport *vport; | |
1573 | u8 *mac; | |
1574 | u8 reset = 0; | |
1575 | u8 send_ctlr_ka = 0; | |
1576 | u8 send_port_ka = 0; | |
97c8389d JE |
1577 | struct fcoe_fcf *sel; |
1578 | struct fcoe_fcf *fcf; | |
8690cb83 | 1579 | unsigned long next_timer; |
97c8389d | 1580 | |
fdb068c6 | 1581 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1582 | if (fip->mode == FIP_MODE_VN2VN) |
1583 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1584 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1585 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1586 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1587 | return; |
1588 | } | |
1589 | ||
1590 | fcf = fip->sel_fcf; | |
8690cb83 | 1591 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1592 | |
1593 | sel = fip->sel_fcf; | |
8690cb83 JE |
1594 | if (!sel && fip->sel_time) { |
1595 | if (time_after_eq(jiffies, fip->sel_time)) { | |
ba9cd5d0 | 1596 | sel = fcoe_ctlr_select(fip); |
8690cb83 JE |
1597 | fip->sel_time = 0; |
1598 | } else if (time_after(next_timer, fip->sel_time)) | |
1599 | next_timer = fip->sel_time; | |
97c8389d JE |
1600 | } |
1601 | ||
794d98e7 JE |
1602 | if (sel && fip->flogi_req_send) |
1603 | fcoe_ctlr_flogi_send(fip); | |
1604 | else if (!sel && fcf) | |
1605 | reset = 1; | |
97c8389d | 1606 | |
8cdffdcc | 1607 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1608 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1609 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1610 | send_ctlr_ka = 1; |
97c8389d JE |
1611 | } |
1612 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1613 | next_timer = fip->ctlr_ka_time; | |
1614 | ||
1615 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1616 | fip->port_ka_time = jiffies + |
70b51aab | 1617 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1618 | send_port_ka = 1; |
97c8389d JE |
1619 | } |
1620 | if (time_after(next_timer, fip->port_ka_time)) | |
1621 | next_timer = fip->port_ka_time; | |
97c8389d | 1622 | } |
8690cb83 JE |
1623 | if (!list_empty(&fip->fcfs)) |
1624 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1625 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1626 | |
516a6486 | 1627 | if (reset) { |
dd42dac4 | 1628 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1629 | /* restart things with a solicitation */ |
1630 | fcoe_ctlr_solicit(fip, NULL); | |
1631 | } | |
11b56188 | 1632 | |
fdb068c6 | 1633 | if (send_ctlr_ka) |
11b56188 | 1634 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1635 | |
1636 | if (send_port_ka) { | |
11b56188 CL |
1637 | mutex_lock(&fip->lp->lp_mutex); |
1638 | mac = fip->get_src_addr(fip->lp); | |
1639 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1640 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1641 | mac = fip->get_src_addr(vport); | |
1642 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1643 | } | |
1644 | mutex_unlock(&fip->lp->lp_mutex); | |
1645 | } | |
97c8389d JE |
1646 | } |
1647 | ||
1648 | /** | |
70b51aab RL |
1649 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1650 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1651 | */ |
1652 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1653 | { | |
1654 | struct fcoe_ctlr *fip; | |
1655 | struct sk_buff *skb; | |
1656 | ||
1657 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1658 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1659 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1660 | } |
1661 | ||
1662 | /** | |
386309ce | 1663 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1664 | * @fip: The FCoE controller |
1665 | * @fp: The FC frame to snoop | |
97c8389d JE |
1666 | * |
1667 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1668 | * | |
1669 | * The caller has checked that we are waiting for login as indicated | |
1670 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1671 | * | |
1672 | * The caller is responsible for freeing the frame. | |
386309ce | 1673 | * Fill in the granted_mac address. |
97c8389d JE |
1674 | * |
1675 | * Return non-zero if the frame should not be delivered to libfc. | |
1676 | */ | |
11b56188 | 1677 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1678 | struct fc_frame *fp) |
97c8389d JE |
1679 | { |
1680 | struct fc_frame_header *fh; | |
1681 | u8 op; | |
386309ce | 1682 | u8 *sa; |
97c8389d | 1683 | |
386309ce | 1684 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1685 | fh = fc_frame_header_get(fp); |
1686 | if (fh->fh_type != FC_TYPE_ELS) | |
1687 | return 0; | |
1688 | ||
1689 | op = fc_frame_payload_op(fp); | |
1690 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1691 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1692 | ||
fdb068c6 | 1693 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1694 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1695 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1696 | return -EINVAL; |
1697 | } | |
9b651da9 | 1698 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1699 | LIBFCOE_FIP_DBG(fip, |
1700 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1701 | |
1702 | /* | |
1703 | * FLOGI accepted. | |
1704 | * If the src mac addr is FC_OUI-based, then we mark the | |
1705 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1706 | * Otherwise we use the FCoE gateway addr | |
1707 | */ | |
1708 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
cd229e42 | 1709 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
1710 | } else { |
1711 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1712 | fip->map_dest = 0; | |
1713 | } | |
1714 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1715 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1716 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1717 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1718 | /* | |
1719 | * Save source MAC for point-to-point responses. | |
1720 | */ | |
fdb068c6 | 1721 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1722 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1723 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1724 | fip->map_dest = 0; | |
e49bf614 JE |
1725 | if (fip->state == FIP_ST_AUTO) |
1726 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1727 | "Setting non-FIP mode\n"); | |
9b651da9 | 1728 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1729 | } |
fdb068c6 | 1730 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1731 | } |
1732 | return 0; | |
1733 | } | |
1734 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1735 | ||
5e80f7f7 | 1736 | /** |
70b51aab RL |
1737 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1738 | * @mac: The MAC address to convert | |
1739 | * @scheme: The scheme to use when converting | |
1740 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1741 | * |
1742 | * Returns: u64 fc world wide name | |
1743 | */ | |
1744 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1745 | unsigned int scheme, unsigned int port) | |
1746 | { | |
1747 | u64 wwn; | |
1748 | u64 host_mac; | |
1749 | ||
1750 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1751 | host_mac = ((u64) mac[0] << 40) | | |
1752 | ((u64) mac[1] << 32) | | |
1753 | ((u64) mac[2] << 24) | | |
1754 | ((u64) mac[3] << 16) | | |
1755 | ((u64) mac[4] << 8) | | |
1756 | (u64) mac[5]; | |
1757 | ||
1758 | WARN_ON(host_mac >= (1ULL << 48)); | |
1759 | wwn = host_mac | ((u64) scheme << 60); | |
1760 | switch (scheme) { | |
1761 | case 1: | |
1762 | WARN_ON(port != 0); | |
1763 | break; | |
1764 | case 2: | |
1765 | WARN_ON(port >= 0xfff); | |
1766 | wwn |= (u64) port << 48; | |
1767 | break; | |
1768 | default: | |
1769 | WARN_ON(1); | |
1770 | break; | |
1771 | } | |
1772 | ||
1773 | return wwn; | |
1774 | } | |
1775 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1776 | ||
e10f8c66 JE |
1777 | /** |
1778 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
1779 | * @rdata: libfc remote port | |
1780 | */ | |
1781 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
1782 | { | |
1783 | return (struct fcoe_rport *)(rdata + 1); | |
1784 | } | |
1785 | ||
1786 | /** | |
1787 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
1788 | * @fip: The FCoE controller | |
1789 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
1790 | * @dest: The destination Ethernet MAC address | |
1791 | * @min_len: minimum size of the Ethernet payload to be sent | |
1792 | */ | |
1793 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
1794 | enum fip_vn2vn_subcode sub, | |
1795 | const u8 *dest, size_t min_len) | |
1796 | { | |
1797 | struct sk_buff *skb; | |
1798 | struct fip_frame { | |
1799 | struct ethhdr eth; | |
1800 | struct fip_header fip; | |
1801 | struct fip_mac_desc mac; | |
1802 | struct fip_wwn_desc wwnn; | |
1803 | struct fip_vn_desc vn; | |
1804 | } __attribute__((packed)) *frame; | |
1805 | struct fip_fc4_feat *ff; | |
1806 | struct fip_size_desc *size; | |
1807 | u32 fcp_feat; | |
1808 | size_t len; | |
1809 | size_t dlen; | |
1810 | ||
1811 | len = sizeof(*frame); | |
1812 | dlen = 0; | |
1813 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1814 | dlen = sizeof(struct fip_fc4_feat) + | |
1815 | sizeof(struct fip_size_desc); | |
1816 | len += dlen; | |
1817 | } | |
1818 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
1819 | len = max(len, min_len + sizeof(struct ethhdr)); | |
1820 | ||
1821 | skb = dev_alloc_skb(len); | |
1822 | if (!skb) | |
1823 | return; | |
1824 | ||
1825 | frame = (struct fip_frame *)skb->data; | |
1826 | memset(frame, 0, len); | |
1827 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
1828 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
1829 | frame->eth.h_proto = htons(ETH_P_FIP); | |
1830 | ||
1831 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
1832 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
1833 | frame->fip.fip_subcode = sub; | |
1834 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
1835 | ||
1836 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
1837 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
1838 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
1839 | ||
1840 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
1841 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
1842 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
1843 | ||
1844 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
1845 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
1846 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
1847 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
1848 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
1849 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
1850 | ||
1851 | /* | |
1852 | * For claims, add FC-4 features. | |
1853 | * TBD: Add interface to get fc-4 types and features from libfc. | |
1854 | */ | |
1855 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1856 | ff = (struct fip_fc4_feat *)(frame + 1); | |
1857 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
1858 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
1859 | ff->fd_fts = fip->lp->fcts; | |
1860 | ||
1861 | fcp_feat = 0; | |
1862 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
1863 | fcp_feat |= FCP_FEAT_INIT; | |
1864 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
1865 | fcp_feat |= FCP_FEAT_TARG; | |
1866 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
1867 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
1868 | ||
1869 | size = (struct fip_size_desc *)(ff + 1); | |
1870 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
1871 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
1872 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
1873 | } | |
1874 | ||
1875 | skb_put(skb, len); | |
1876 | skb->protocol = htons(ETH_P_FIP); | |
1877 | skb_reset_mac_header(skb); | |
1878 | skb_reset_network_header(skb); | |
1879 | ||
1880 | fip->send(fip, skb); | |
1881 | } | |
1882 | ||
1883 | /** | |
1884 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
1885 | * @lport: The lport which is receiving the event | |
1886 | * @rdata: remote port private data | |
1887 | * @event: The event that occured | |
1888 | * | |
1889 | * Locking Note: The rport lock must not be held when calling this function. | |
1890 | */ | |
1891 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
1892 | struct fc_rport_priv *rdata, | |
1893 | enum fc_rport_event event) | |
1894 | { | |
1895 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1896 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
1897 | ||
1898 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
1899 | rdata->ids.port_id, event); | |
1900 | ||
1901 | mutex_lock(&fip->ctlr_mutex); | |
1902 | switch (event) { | |
1903 | case RPORT_EV_READY: | |
1904 | frport->login_count = 0; | |
1905 | break; | |
1906 | case RPORT_EV_LOGO: | |
1907 | case RPORT_EV_FAILED: | |
1908 | case RPORT_EV_STOP: | |
1909 | frport->login_count++; | |
1910 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
1911 | LIBFCOE_FIP_DBG(fip, | |
1912 | "rport FLOGI limited port_id %6.6x\n", | |
1913 | rdata->ids.port_id); | |
1914 | lport->tt.rport_logoff(rdata); | |
1915 | } | |
1916 | break; | |
1917 | default: | |
1918 | break; | |
1919 | } | |
1920 | mutex_unlock(&fip->ctlr_mutex); | |
1921 | } | |
1922 | ||
1923 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
1924 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
1925 | }; | |
1926 | ||
1927 | /** | |
1928 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
1929 | * @fip: The FCoE controller | |
1930 | * | |
1931 | * Called with ctlr_mutex held. | |
1932 | */ | |
1933 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
1934 | { | |
1935 | mutex_lock(&lport->disc.disc_mutex); | |
1936 | lport->disc.disc_callback = NULL; | |
1937 | mutex_unlock(&lport->disc.disc_mutex); | |
1938 | } | |
1939 | ||
1940 | /** | |
1941 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
1942 | * @fip: The FCoE controller | |
1943 | * | |
1944 | * Called through the local port template for discovery. | |
1945 | * Called without the ctlr_mutex held. | |
1946 | */ | |
1947 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
1948 | { | |
1949 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1950 | ||
1951 | mutex_lock(&fip->ctlr_mutex); | |
1952 | fcoe_ctlr_disc_stop_locked(lport); | |
1953 | mutex_unlock(&fip->ctlr_mutex); | |
1954 | } | |
1955 | ||
1956 | /** | |
1957 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
1958 | * @fip: The FCoE controller | |
1959 | * | |
1960 | * Called through the local port template for discovery. | |
1961 | * Called without the ctlr_mutex held. | |
1962 | */ | |
1963 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
1964 | { | |
1965 | fcoe_ctlr_disc_stop(lport); | |
1966 | lport->tt.rport_flush_queue(); | |
1967 | synchronize_rcu(); | |
1968 | } | |
1969 | ||
1970 | /** | |
1971 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
1972 | * @fip: The FCoE controller | |
1973 | * | |
1974 | * Called with fcoe_ctlr lock held. | |
1975 | */ | |
1976 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
1977 | { | |
1978 | unsigned long wait; | |
1979 | u32 port_id; | |
1980 | ||
1981 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
1982 | ||
1983 | /* | |
1984 | * Get proposed port ID. | |
1985 | * If this is the first try after link up, use any previous port_id. | |
1986 | * If there was none, use the low bits of the port_name. | |
1987 | * On subsequent tries, get the next random one. | |
1988 | * Don't use reserved IDs, use another non-zero value, just as random. | |
1989 | */ | |
1990 | port_id = fip->port_id; | |
1991 | if (fip->probe_tries) | |
1992 | port_id = prandom32(&fip->rnd_state) & 0xffff; | |
1993 | else if (!port_id) | |
1994 | port_id = fip->lp->wwpn & 0xffff; | |
1995 | if (!port_id || port_id == 0xffff) | |
1996 | port_id = 1; | |
1997 | fip->port_id = port_id; | |
1998 | ||
1999 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
2000 | fip->probe_tries++; | |
2001 | wait = random32() % FIP_VN_PROBE_WAIT; | |
2002 | } else | |
2003 | wait = FIP_VN_RLIM_INT; | |
2004 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
2005 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
2006 | } | |
2007 | ||
2008 | /** | |
2009 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
2010 | * @fip: The FCoE controller | |
2011 | * | |
2012 | * Called with fcoe_ctlr lock held. | |
2013 | */ | |
2014 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
2015 | { | |
2016 | fip->probe_tries = 0; | |
2017 | prandom32_seed(&fip->rnd_state, fip->lp->wwpn); | |
2018 | fcoe_ctlr_vn_restart(fip); | |
2019 | } | |
2020 | ||
2021 | /** | |
2022 | * fcoe_ctlr_vn_parse - parse probe request or response | |
2023 | * @fip: The FCoE controller | |
2024 | * @skb: incoming packet | |
2025 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
2026 | * | |
2027 | * Returns non-zero error number on error. | |
2028 | * Does not consume the packet. | |
2029 | */ | |
2030 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
2031 | struct sk_buff *skb, | |
2032 | struct fc_rport_priv *rdata) | |
2033 | { | |
2034 | struct fip_header *fiph; | |
2035 | struct fip_desc *desc = NULL; | |
2036 | struct fip_mac_desc *macd = NULL; | |
2037 | struct fip_wwn_desc *wwn = NULL; | |
2038 | struct fip_vn_desc *vn = NULL; | |
2039 | struct fip_size_desc *size = NULL; | |
2040 | struct fcoe_rport *frport; | |
2041 | size_t rlen; | |
2042 | size_t dlen; | |
2043 | u32 desc_mask = 0; | |
2044 | u32 dtype; | |
2045 | u8 sub; | |
2046 | ||
2047 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2048 | frport = fcoe_ctlr_rport(rdata); | |
2049 | ||
2050 | fiph = (struct fip_header *)skb->data; | |
2051 | frport->flags = ntohs(fiph->fip_flags); | |
2052 | ||
2053 | sub = fiph->fip_subcode; | |
2054 | switch (sub) { | |
2055 | case FIP_SC_VN_PROBE_REQ: | |
2056 | case FIP_SC_VN_PROBE_REP: | |
2057 | case FIP_SC_VN_BEACON: | |
2058 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2059 | BIT(FIP_DT_VN_ID); | |
2060 | break; | |
2061 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2062 | case FIP_SC_VN_CLAIM_REP: | |
2063 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2064 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
2065 | BIT(FIP_DT_FCOE_SIZE); | |
2066 | break; | |
2067 | default: | |
2068 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2069 | return -EINVAL; | |
2070 | } | |
2071 | ||
2072 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2073 | if (rlen + sizeof(*fiph) > skb->len) | |
2074 | return -EINVAL; | |
2075 | ||
2076 | desc = (struct fip_desc *)(fiph + 1); | |
2077 | while (rlen > 0) { | |
2078 | dlen = desc->fip_dlen * FIP_BPW; | |
2079 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2080 | return -EINVAL; | |
2081 | ||
2082 | dtype = desc->fip_dtype; | |
2083 | if (dtype < 32) { | |
2084 | if (!(desc_mask & BIT(dtype))) { | |
2085 | LIBFCOE_FIP_DBG(fip, | |
2086 | "unexpected or duplicated desc " | |
2087 | "desc type %u in " | |
2088 | "FIP VN2VN subtype %u\n", | |
2089 | dtype, sub); | |
2090 | return -EINVAL; | |
2091 | } | |
2092 | desc_mask &= ~BIT(dtype); | |
2093 | } | |
2094 | ||
2095 | switch (dtype) { | |
2096 | case FIP_DT_MAC: | |
2097 | if (dlen != sizeof(struct fip_mac_desc)) | |
2098 | goto len_err; | |
2099 | macd = (struct fip_mac_desc *)desc; | |
2100 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2101 | LIBFCOE_FIP_DBG(fip, | |
2102 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2103 | macd->fd_mac); | |
2104 | return -EINVAL; | |
2105 | } | |
2106 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2107 | break; | |
2108 | case FIP_DT_NAME: | |
2109 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2110 | goto len_err; | |
2111 | wwn = (struct fip_wwn_desc *)desc; | |
2112 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2113 | break; | |
2114 | case FIP_DT_VN_ID: | |
2115 | if (dlen != sizeof(struct fip_vn_desc)) | |
2116 | goto len_err; | |
2117 | vn = (struct fip_vn_desc *)desc; | |
2118 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
2119 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
2120 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
2121 | break; | |
2122 | case FIP_DT_FC4F: | |
2123 | if (dlen != sizeof(struct fip_fc4_feat)) | |
2124 | goto len_err; | |
2125 | break; | |
2126 | case FIP_DT_FCOE_SIZE: | |
2127 | if (dlen != sizeof(struct fip_size_desc)) | |
2128 | goto len_err; | |
2129 | size = (struct fip_size_desc *)desc; | |
2130 | frport->fcoe_len = ntohs(size->fd_size); | |
2131 | break; | |
2132 | default: | |
2133 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2134 | "in FIP probe\n", dtype); | |
2135 | /* standard says ignore unknown descriptors >= 128 */ | |
2136 | if (dtype < FIP_DT_VENDOR_BASE) | |
2137 | return -EINVAL; | |
2138 | break; | |
2139 | } | |
2140 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2141 | rlen -= dlen; | |
2142 | } | |
2143 | return 0; | |
2144 | ||
2145 | len_err: | |
2146 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2147 | dtype, dlen); | |
2148 | return -EINVAL; | |
2149 | } | |
2150 | ||
2151 | /** | |
2152 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
2153 | * @fip: The FCoE controller | |
2154 | * | |
2155 | * Called with ctlr_mutex held. | |
2156 | */ | |
2157 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
2158 | { | |
2159 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
2160 | fip->sol_time = jiffies; | |
2161 | } | |
2162 | ||
2163 | /** | |
2164 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
2165 | * @fip: The FCoE controller | |
2166 | * @rdata: parsed remote port with frport from the probe request | |
2167 | * | |
2168 | * Called with ctlr_mutex held. | |
2169 | */ | |
2170 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
2171 | struct fc_rport_priv *rdata) | |
2172 | { | |
2173 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2174 | ||
2175 | if (rdata->ids.port_id != fip->port_id) | |
2176 | return; | |
2177 | ||
2178 | switch (fip->state) { | |
2179 | case FIP_ST_VNMP_CLAIM: | |
2180 | case FIP_ST_VNMP_UP: | |
2181 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2182 | frport->enode_mac, 0); | |
2183 | break; | |
2184 | case FIP_ST_VNMP_PROBE1: | |
2185 | case FIP_ST_VNMP_PROBE2: | |
2186 | /* | |
2187 | * Decide whether to reply to the Probe. | |
2188 | * Our selected address is never a "recorded" one, so | |
2189 | * only reply if our WWPN is greater and the | |
2190 | * Probe's REC bit is not set. | |
2191 | * If we don't reply, we will change our address. | |
2192 | */ | |
2193 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2194 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
2195 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2196 | frport->enode_mac, 0); | |
2197 | break; | |
2198 | } | |
2199 | /* fall through */ | |
2200 | case FIP_ST_VNMP_START: | |
2201 | fcoe_ctlr_vn_restart(fip); | |
2202 | break; | |
2203 | default: | |
2204 | break; | |
2205 | } | |
2206 | } | |
2207 | ||
2208 | /** | |
2209 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2210 | * @fip: The FCoE controller | |
2211 | * @rdata: parsed remote port with frport from the probe request | |
2212 | * | |
2213 | * Called with ctlr_mutex held. | |
2214 | */ | |
2215 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2216 | struct fc_rport_priv *rdata) | |
2217 | { | |
2218 | if (rdata->ids.port_id != fip->port_id) | |
2219 | return; | |
2220 | switch (fip->state) { | |
2221 | case FIP_ST_VNMP_START: | |
2222 | case FIP_ST_VNMP_PROBE1: | |
2223 | case FIP_ST_VNMP_PROBE2: | |
2224 | case FIP_ST_VNMP_CLAIM: | |
2225 | fcoe_ctlr_vn_restart(fip); | |
2226 | break; | |
2227 | case FIP_ST_VNMP_UP: | |
2228 | fcoe_ctlr_vn_send_claim(fip); | |
2229 | break; | |
2230 | default: | |
2231 | break; | |
2232 | } | |
2233 | } | |
2234 | ||
2235 | /** | |
2236 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2237 | * @fip: The FCoE controller | |
2238 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2239 | * | |
2240 | * Called with ctlr_mutex held. | |
2241 | */ | |
2242 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2243 | { | |
2244 | struct fc_lport *lport = fip->lp; | |
2245 | struct fc_rport_priv *rdata; | |
2246 | struct fc_rport_identifiers *ids; | |
2247 | struct fcoe_rport *frport; | |
2248 | u32 port_id; | |
2249 | ||
2250 | port_id = new->ids.port_id; | |
2251 | if (port_id == fip->port_id) | |
2252 | return; | |
2253 | ||
2254 | mutex_lock(&lport->disc.disc_mutex); | |
2255 | rdata = lport->tt.rport_create(lport, port_id); | |
2256 | if (!rdata) { | |
2257 | mutex_unlock(&lport->disc.disc_mutex); | |
2258 | return; | |
2259 | } | |
2260 | ||
2261 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2262 | rdata->disc_id = lport->disc.disc_id; | |
2263 | ||
2264 | ids = &rdata->ids; | |
2265 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
2266 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) | |
2267 | lport->tt.rport_logoff(rdata); | |
2268 | ids->port_name = new->ids.port_name; | |
2269 | ids->node_name = new->ids.node_name; | |
2270 | mutex_unlock(&lport->disc.disc_mutex); | |
2271 | ||
2272 | frport = fcoe_ctlr_rport(rdata); | |
2273 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", | |
2274 | port_id, frport->fcoe_len ? "old" : "new"); | |
2275 | *frport = *fcoe_ctlr_rport(new); | |
2276 | frport->time = 0; | |
2277 | } | |
2278 | ||
2279 | /** | |
2280 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2281 | * @fip: The FCoE controller | |
2282 | * @port_id: The port_id of the remote VN_node | |
2283 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2284 | * | |
2285 | * Returns non-zero error if no remote port found. | |
2286 | */ | |
2287 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2288 | { | |
2289 | struct fc_lport *lport = fip->lp; | |
2290 | struct fc_rport_priv *rdata; | |
2291 | struct fcoe_rport *frport; | |
2292 | int ret = -1; | |
2293 | ||
2294 | rcu_read_lock(); | |
2295 | rdata = lport->tt.rport_lookup(lport, port_id); | |
2296 | if (rdata) { | |
2297 | frport = fcoe_ctlr_rport(rdata); | |
2298 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2299 | ret = 0; | |
2300 | } | |
2301 | rcu_read_unlock(); | |
2302 | return ret; | |
2303 | } | |
2304 | ||
2305 | /** | |
2306 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2307 | * @fip: The FCoE controller | |
2308 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2309 | * | |
2310 | * Called with ctlr_mutex held. | |
2311 | */ | |
2312 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2313 | struct fc_rport_priv *new) | |
2314 | { | |
2315 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2316 | ||
2317 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2318 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2319 | return; | |
2320 | } | |
2321 | switch (fip->state) { | |
2322 | case FIP_ST_VNMP_START: | |
2323 | case FIP_ST_VNMP_PROBE1: | |
2324 | case FIP_ST_VNMP_PROBE2: | |
2325 | if (new->ids.port_id == fip->port_id) | |
2326 | fcoe_ctlr_vn_restart(fip); | |
2327 | break; | |
2328 | case FIP_ST_VNMP_CLAIM: | |
2329 | case FIP_ST_VNMP_UP: | |
2330 | if (new->ids.port_id == fip->port_id) { | |
2331 | if (new->ids.port_name > fip->lp->wwpn) { | |
2332 | fcoe_ctlr_vn_restart(fip); | |
2333 | break; | |
2334 | } | |
2335 | fcoe_ctlr_vn_send_claim(fip); | |
2336 | break; | |
2337 | } | |
2338 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, | |
2339 | min((u32)frport->fcoe_len, | |
2340 | fcoe_ctlr_fcoe_size(fip))); | |
2341 | fcoe_ctlr_vn_add(fip, new); | |
2342 | break; | |
2343 | default: | |
2344 | break; | |
2345 | } | |
2346 | } | |
2347 | ||
2348 | /** | |
2349 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2350 | * @fip: The FCoE controller that received the frame | |
2351 | * @new: newly-parsed remote port with frport from the Claim Response | |
2352 | * | |
2353 | * Called with ctlr_mutex held. | |
2354 | */ | |
2355 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2356 | struct fc_rport_priv *new) | |
2357 | { | |
2358 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2359 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2360 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2361 | fcoe_ctlr_vn_add(fip, new); | |
2362 | } | |
2363 | ||
2364 | /** | |
2365 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2366 | * @fip: The FCoE controller that received the frame | |
2367 | * @new: newly-parsed remote port with frport from the Beacon | |
2368 | * | |
2369 | * Called with ctlr_mutex held. | |
2370 | */ | |
2371 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2372 | struct fc_rport_priv *new) | |
2373 | { | |
2374 | struct fc_lport *lport = fip->lp; | |
2375 | struct fc_rport_priv *rdata; | |
2376 | struct fcoe_rport *frport; | |
2377 | ||
2378 | frport = fcoe_ctlr_rport(new); | |
2379 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2380 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2381 | return; | |
2382 | } | |
2383 | mutex_lock(&lport->disc.disc_mutex); | |
2384 | rdata = lport->tt.rport_lookup(lport, new->ids.port_id); | |
2385 | if (rdata) | |
2386 | kref_get(&rdata->kref); | |
2387 | mutex_unlock(&lport->disc.disc_mutex); | |
2388 | if (rdata) { | |
2389 | if (rdata->ids.node_name == new->ids.node_name && | |
2390 | rdata->ids.port_name == new->ids.port_name) { | |
2391 | frport = fcoe_ctlr_rport(rdata); | |
2392 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) | |
2393 | lport->tt.rport_login(rdata); | |
2394 | frport->time = jiffies; | |
2395 | } | |
2396 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
2397 | return; | |
2398 | } | |
2399 | if (fip->state != FIP_ST_VNMP_UP) | |
2400 | return; | |
2401 | ||
2402 | /* | |
2403 | * Beacon from a new neighbor. | |
2404 | * Send a claim notify if one hasn't been sent recently. | |
2405 | * Don't add the neighbor yet. | |
2406 | */ | |
2407 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2408 | new->ids.port_id); | |
2409 | if (time_after(jiffies, | |
2410 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2411 | fcoe_ctlr_vn_send_claim(fip); | |
2412 | } | |
2413 | ||
2414 | /** | |
2415 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2416 | * @fip: The FCoE controller | |
2417 | * | |
2418 | * Called with ctlr_mutex held. | |
2419 | * Called only in state FIP_ST_VNMP_UP. | |
2420 | * Returns the soonest time for next age-out or a time far in the future. | |
2421 | */ | |
2422 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2423 | { | |
2424 | struct fc_lport *lport = fip->lp; | |
2425 | struct fc_rport_priv *rdata; | |
2426 | struct fcoe_rport *frport; | |
2427 | unsigned long next_time; | |
2428 | unsigned long deadline; | |
2429 | ||
2430 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
2431 | mutex_lock(&lport->disc.disc_mutex); | |
2432 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { | |
2433 | frport = fcoe_ctlr_rport(rdata); | |
2434 | if (!frport->time) | |
2435 | continue; | |
2436 | deadline = frport->time + | |
2437 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2438 | if (time_after_eq(jiffies, deadline)) { | |
2439 | frport->time = 0; | |
2440 | LIBFCOE_FIP_DBG(fip, | |
2441 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2442 | rdata->ids.port_name, rdata->ids.port_id); | |
2443 | lport->tt.rport_logoff(rdata); | |
2444 | } else if (time_before(deadline, next_time)) | |
2445 | next_time = deadline; | |
2446 | } | |
2447 | mutex_unlock(&lport->disc.disc_mutex); | |
2448 | return next_time; | |
2449 | } | |
2450 | ||
2451 | /** | |
2452 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2453 | * @fip: The FCoE controller that received the frame | |
2454 | * @skb: The received FIP frame | |
2455 | * | |
2456 | * Returns non-zero if the frame is dropped. | |
2457 | * Always consumes the frame. | |
2458 | */ | |
2459 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2460 | { | |
2461 | struct fip_header *fiph; | |
2462 | enum fip_vn2vn_subcode sub; | |
2dc02ee5 | 2463 | struct { |
e10f8c66 JE |
2464 | struct fc_rport_priv rdata; |
2465 | struct fcoe_rport frport; | |
2466 | } buf; | |
2467 | int rc; | |
2468 | ||
2469 | fiph = (struct fip_header *)skb->data; | |
2470 | sub = fiph->fip_subcode; | |
2471 | ||
2472 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); | |
2473 | if (rc) { | |
2474 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2475 | goto drop; | |
2476 | } | |
2477 | ||
2478 | mutex_lock(&fip->ctlr_mutex); | |
2479 | switch (sub) { | |
2480 | case FIP_SC_VN_PROBE_REQ: | |
2481 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2482 | break; | |
2483 | case FIP_SC_VN_PROBE_REP: | |
2484 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2485 | break; | |
2486 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2487 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2488 | break; | |
2489 | case FIP_SC_VN_CLAIM_REP: | |
2490 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2491 | break; | |
2492 | case FIP_SC_VN_BEACON: | |
2493 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2494 | break; | |
2495 | default: | |
2496 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2497 | rc = -1; | |
2498 | break; | |
2499 | } | |
2500 | mutex_unlock(&fip->ctlr_mutex); | |
2501 | drop: | |
2502 | kfree_skb(skb); | |
2503 | return rc; | |
2504 | } | |
2505 | ||
2506 | /** | |
2507 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
92261156 JE |
2508 | * @lport: The local port |
2509 | * @fp: The received frame | |
e10f8c66 JE |
2510 | * |
2511 | * This should never be called since we don't see RSCNs or other | |
2512 | * fabric-generated ELSes. | |
2513 | */ | |
92261156 | 2514 | static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) |
e10f8c66 JE |
2515 | { |
2516 | struct fc_seq_els_data rjt_data; | |
2517 | ||
e10f8c66 JE |
2518 | rjt_data.reason = ELS_RJT_UNSUP; |
2519 | rjt_data.explan = ELS_EXPL_NONE; | |
92261156 | 2520 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
e10f8c66 JE |
2521 | fc_frame_free(fp); |
2522 | } | |
2523 | ||
2524 | /** | |
2525 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
2526 | * @fip: The FCoE controller | |
2527 | * | |
2528 | * This sets a flag indicating that remote ports should be created | |
2529 | * and started for the peers we discover. We use the disc_callback | |
2530 | * pointer as that flag. Peers already discovered are created here. | |
2531 | * | |
2532 | * The lport lock is held during this call. The callback must be done | |
2533 | * later, without holding either the lport or discovery locks. | |
2534 | * The fcoe_ctlr lock may also be held during this call. | |
2535 | */ | |
2536 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
2537 | enum fc_disc_event), | |
2538 | struct fc_lport *lport) | |
2539 | { | |
2540 | struct fc_disc *disc = &lport->disc; | |
2541 | struct fcoe_ctlr *fip = disc->priv; | |
2542 | ||
2543 | mutex_lock(&disc->disc_mutex); | |
2544 | disc->disc_callback = callback; | |
2545 | disc->disc_id = (disc->disc_id + 2) | 1; | |
2546 | disc->pending = 1; | |
2547 | schedule_work(&fip->timer_work); | |
2548 | mutex_unlock(&disc->disc_mutex); | |
2549 | } | |
2550 | ||
2551 | /** | |
2552 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
2553 | * @fip: The FCoE controller | |
2554 | * | |
2555 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
2556 | * we've received at least one beacon. | |
2557 | * Performs the discovery complete callback. | |
2558 | */ | |
2559 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
2560 | { | |
2561 | struct fc_lport *lport = fip->lp; | |
2562 | struct fc_disc *disc = &lport->disc; | |
2563 | struct fc_rport_priv *rdata; | |
2564 | struct fcoe_rport *frport; | |
2565 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
2566 | ||
2567 | mutex_lock(&disc->disc_mutex); | |
2568 | callback = disc->pending ? disc->disc_callback : NULL; | |
2569 | disc->pending = 0; | |
2570 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
2571 | frport = fcoe_ctlr_rport(rdata); | |
2572 | if (frport->time) | |
2573 | lport->tt.rport_login(rdata); | |
2574 | } | |
2575 | mutex_unlock(&disc->disc_mutex); | |
2576 | if (callback) | |
2577 | callback(lport, DISC_EV_SUCCESS); | |
2578 | } | |
2579 | ||
2580 | /** | |
2581 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
2582 | * @fip: The FCoE controller | |
2583 | */ | |
2584 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
2585 | { | |
2586 | unsigned long next_time; | |
2587 | u8 mac[ETH_ALEN]; | |
2588 | u32 new_port_id = 0; | |
2589 | ||
2590 | mutex_lock(&fip->ctlr_mutex); | |
2591 | switch (fip->state) { | |
2592 | case FIP_ST_VNMP_START: | |
2593 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
2594 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2595 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
2596 | break; | |
2597 | case FIP_ST_VNMP_PROBE1: | |
2598 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
2599 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2600 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2601 | break; | |
2602 | case FIP_ST_VNMP_PROBE2: | |
2603 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
2604 | new_port_id = fip->port_id; | |
2605 | hton24(mac, FIP_VN_FC_MAP); | |
2606 | hton24(mac + 3, new_port_id); | |
cd229e42 | 2607 | fcoe_ctlr_map_dest(fip); |
e10f8c66 JE |
2608 | fip->update_mac(fip->lp, mac); |
2609 | fcoe_ctlr_vn_send_claim(fip); | |
2610 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2611 | break; | |
2612 | case FIP_ST_VNMP_CLAIM: | |
2613 | /* | |
2614 | * This may be invoked either by starting discovery so don't | |
2615 | * go to the next state unless it's been long enough. | |
2616 | */ | |
2617 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2618 | if (time_after_eq(jiffies, next_time)) { | |
2619 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
2620 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2621 | fcoe_all_vn2vn, 0); | |
2622 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2623 | fip->port_ka_time = next_time; | |
2624 | } | |
2625 | fcoe_ctlr_vn_disc(fip); | |
2626 | break; | |
2627 | case FIP_ST_VNMP_UP: | |
2628 | next_time = fcoe_ctlr_vn_age(fip); | |
2629 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
2630 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2631 | fcoe_all_vn2vn, 0); | |
2632 | fip->port_ka_time = jiffies + | |
2633 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
2634 | (random32() % FIP_VN_BEACON_FUZZ)); | |
2635 | } | |
2636 | if (time_before(fip->port_ka_time, next_time)) | |
2637 | next_time = fip->port_ka_time; | |
2638 | break; | |
2639 | case FIP_ST_LINK_WAIT: | |
2640 | goto unlock; | |
2641 | default: | |
11aa9900 | 2642 | WARN(1, "unexpected state %d\n", fip->state); |
e10f8c66 JE |
2643 | goto unlock; |
2644 | } | |
2645 | mod_timer(&fip->timer, next_time); | |
2646 | unlock: | |
2647 | mutex_unlock(&fip->ctlr_mutex); | |
2648 | ||
2649 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
2650 | if (new_port_id) | |
2651 | fc_lport_set_local_id(fip->lp, new_port_id); | |
2652 | } | |
2653 | ||
5e80f7f7 | 2654 | /** |
70b51aab RL |
2655 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
2656 | * @lp: The local port to configure libfc for | |
e10f8c66 | 2657 | * @fip: The FCoE controller in use by the local port |
70b51aab | 2658 | * @tt: The libfc function template |
e10f8c66 | 2659 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
2660 | * |
2661 | * Returns : 0 for success | |
2662 | */ | |
e10f8c66 JE |
2663 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2664 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
2665 | { |
2666 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 2667 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 2668 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 2669 | return -ENOMEM; |
70b51aab RL |
2670 | fc_exch_init(lport); |
2671 | fc_elsct_init(lport); | |
2672 | fc_lport_init(lport); | |
e10f8c66 JE |
2673 | if (fip->mode == FIP_MODE_VN2VN) |
2674 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
70b51aab | 2675 | fc_rport_init(lport); |
e10f8c66 JE |
2676 | if (fip->mode == FIP_MODE_VN2VN) { |
2677 | lport->point_to_multipoint = 1; | |
2678 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
2679 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
2680 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
2681 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
2682 | mutex_init(&lport->disc.disc_mutex); | |
2683 | INIT_LIST_HEAD(&lport->disc.rports); | |
2684 | lport->disc.priv = fip; | |
2685 | } else { | |
2686 | fc_disc_init(lport); | |
2687 | } | |
5e80f7f7 VD |
2688 | return 0; |
2689 | } | |
2690 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); |