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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
35 | #include <net/rtnetlink.h> |
36 | ||
37 | #include <scsi/fc/fc_els.h> | |
38 | #include <scsi/fc/fc_fs.h> | |
39 | #include <scsi/fc/fc_fip.h> | |
40 | #include <scsi/fc/fc_encaps.h> | |
41 | #include <scsi/fc/fc_fcoe.h> | |
e10f8c66 | 42 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
43 | |
44 | #include <scsi/libfc.h> | |
97c8389d | 45 | #include <scsi/libfcoe.h> |
9b34ecff VD |
46 | |
47 | MODULE_AUTHOR("Open-FCoE.org"); | |
97c8389d | 48 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
9b34ecff | 49 | MODULE_LICENSE("GPL v2"); |
5e80f7f7 | 50 | |
97c8389d JE |
51 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
52 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
53 | ||
54 | static void fcoe_ctlr_timeout(unsigned long); | |
42913657 | 55 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d JE |
56 | static void fcoe_ctlr_recv_work(struct work_struct *); |
57 | ||
e10f8c66 JE |
58 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); |
59 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); | |
60 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); | |
61 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); | |
62 | ||
97c8389d | 63 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
64 | static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; |
65 | static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; | |
66 | static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; | |
97c8389d | 67 | |
650bd12b RL |
68 | unsigned int libfcoe_debug_logging; |
69 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
70 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
97c8389d | 71 | |
70b51aab | 72 | #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
650bd12b RL |
73 | #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
74 | ||
70b51aab RL |
75 | #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
76 | do { \ | |
77 | if (unlikely(libfcoe_debug_logging & LEVEL)) \ | |
78 | do { \ | |
79 | CMD; \ | |
80 | } while (0); \ | |
a69b06bc | 81 | } while (0) |
650bd12b RL |
82 | |
83 | #define LIBFCOE_DBG(fmt, args...) \ | |
84 | LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ | |
85 | printk(KERN_INFO "libfcoe: " fmt, ##args);) | |
97c8389d | 86 | |
0f51c2e5 | 87 | #define LIBFCOE_FIP_DBG(fip, fmt, args...) \ |
650bd12b | 88 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
0f51c2e5 JE |
89 | printk(KERN_INFO "host%d: fip: " fmt, \ |
90 | (fip)->lp->host->host_no, ##args);) | |
97c8389d | 91 | |
9b651da9 JE |
92 | static const char *fcoe_ctlr_states[] = { |
93 | [FIP_ST_DISABLED] = "DISABLED", | |
94 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
95 | [FIP_ST_AUTO] = "AUTO", | |
96 | [FIP_ST_NON_FIP] = "NON_FIP", | |
97 | [FIP_ST_ENABLED] = "ENABLED", | |
e10f8c66 JE |
98 | [FIP_ST_VNMP_START] = "VNMP_START", |
99 | [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", | |
100 | [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", | |
101 | [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", | |
102 | [FIP_ST_VNMP_UP] = "VNMP_UP", | |
9b651da9 JE |
103 | }; |
104 | ||
105 | static const char *fcoe_ctlr_state(enum fip_state state) | |
106 | { | |
107 | const char *cp = "unknown"; | |
108 | ||
109 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
110 | cp = fcoe_ctlr_states[state]; | |
111 | if (!cp) | |
112 | cp = "unknown"; | |
113 | return cp; | |
114 | } | |
115 | ||
116 | /** | |
117 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
118 | * @fip: The FCoE controller | |
119 | * @state: The new state | |
120 | */ | |
121 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
122 | { | |
123 | if (state == fip->state) | |
124 | return; | |
125 | if (fip->lp) | |
126 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
127 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
128 | fip->state = state; | |
129 | } | |
130 | ||
70b51aab RL |
131 | /** |
132 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
133 | * @fcf: The FCF to check | |
134 | * | |
97c8389d JE |
135 | * Return non-zero if FCF fcoe_size has been validated. |
136 | */ | |
137 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
138 | { | |
139 | return (fcf->flags & FIP_FL_SOL) != 0; | |
140 | } | |
141 | ||
70b51aab RL |
142 | /** |
143 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
144 | * @fcf: The FCF to check | |
145 | * | |
97c8389d JE |
146 | * Return non-zero if the FCF is usable. |
147 | */ | |
148 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
149 | { | |
150 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
151 | ||
152 | return (fcf->flags & flags) == flags; | |
153 | } | |
154 | ||
155 | /** | |
70b51aab RL |
156 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
157 | * @fip: The FCoE controller to initialize | |
97c8389d | 158 | */ |
3d902ac0 | 159 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 160 | { |
9b651da9 | 161 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 162 | fip->mode = mode; |
97c8389d | 163 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 164 | mutex_init(&fip->ctlr_mutex); |
97c8389d JE |
165 | fip->flogi_oxid = FC_XID_UNKNOWN; |
166 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 167 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
168 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
169 | skb_queue_head_init(&fip->fip_recv_list); | |
170 | } | |
171 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
172 | ||
173 | /** | |
70b51aab RL |
174 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
175 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
176 | * |
177 | * Called with &fcoe_ctlr lock held. | |
178 | */ | |
179 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
180 | { | |
181 | struct fcoe_fcf *fcf; | |
182 | struct fcoe_fcf *next; | |
183 | ||
184 | fip->sel_fcf = NULL; | |
185 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
186 | list_del(&fcf->list); | |
187 | kfree(fcf); | |
188 | } | |
189 | fip->fcf_count = 0; | |
190 | fip->sel_time = 0; | |
191 | } | |
192 | ||
193 | /** | |
70b51aab RL |
194 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
195 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
196 | * |
197 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
198 | * | |
199 | * The receive handler will have been deleted before this to guarantee | |
200 | * that no more recv_work will be scheduled. | |
201 | * | |
202 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
203 | * This guarantees that no further timeouts or work will be scheduled. | |
204 | */ | |
205 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
206 | { | |
a4b7cfae | 207 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 208 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 209 | |
fdb068c6 | 210 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 211 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 212 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 213 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 214 | del_timer_sync(&fip->timer); |
42913657 | 215 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
216 | } |
217 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
218 | ||
219 | /** | |
70b51aab RL |
220 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
221 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
222 | * |
223 | * Returns the maximum packet size including the FCoE header and trailer, | |
224 | * but not including any Ethernet or VLAN headers. | |
225 | */ | |
226 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
227 | { | |
228 | /* | |
229 | * Determine the max FCoE frame size allowed, including | |
230 | * FCoE header and trailer. | |
231 | * Note: lp->mfs is currently the payload size, not the frame size. | |
232 | */ | |
233 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
234 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
235 | } | |
236 | ||
237 | /** | |
70b51aab RL |
238 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
239 | * @fip: The FCoE controller to send the solicitation on | |
240 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
241 | */ |
242 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
243 | { | |
244 | struct sk_buff *skb; | |
245 | struct fip_sol { | |
246 | struct ethhdr eth; | |
247 | struct fip_header fip; | |
248 | struct { | |
249 | struct fip_mac_desc mac; | |
250 | struct fip_wwn_desc wwnn; | |
251 | struct fip_size_desc size; | |
252 | } __attribute__((packed)) desc; | |
253 | } __attribute__((packed)) *sol; | |
254 | u32 fcoe_size; | |
255 | ||
256 | skb = dev_alloc_skb(sizeof(*sol)); | |
257 | if (!skb) | |
258 | return; | |
259 | ||
260 | sol = (struct fip_sol *)skb->data; | |
261 | ||
262 | memset(sol, 0, sizeof(*sol)); | |
263 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
264 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
265 | sol->eth.h_proto = htons(ETH_P_FIP); | |
266 | ||
267 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
268 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
269 | sol->fip.fip_subcode = FIP_SC_SOL; | |
270 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
271 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
272 | if (fip->spma) |
273 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
274 | |
275 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
276 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
277 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
278 | ||
279 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
280 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
281 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
282 | ||
283 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
284 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
285 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
286 | sol->desc.size.fd_size = htons(fcoe_size); | |
287 | ||
288 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 289 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
290 | skb_reset_mac_header(skb); |
291 | skb_reset_network_header(skb); | |
292 | fip->send(fip, skb); | |
293 | ||
294 | if (!fcf) | |
295 | fip->sol_time = jiffies; | |
296 | } | |
297 | ||
298 | /** | |
70b51aab RL |
299 | * fcoe_ctlr_link_up() - Start FCoE controller |
300 | * @fip: The FCoE controller to start | |
97c8389d JE |
301 | * |
302 | * Called from the LLD when the network link is ready. | |
303 | */ | |
304 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
305 | { | |
fdb068c6 | 306 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 307 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 308 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
309 | fc_linkup(fip->lp); |
310 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 311 | fcoe_ctlr_set_state(fip, fip->mode); |
e10f8c66 JE |
312 | switch (fip->mode) { |
313 | default: | |
314 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
315 | /* fall-through */ | |
316 | case FIP_MODE_AUTO: | |
0f51c2e5 | 317 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
318 | /* fall-through */ |
319 | case FIP_MODE_FABRIC: | |
320 | case FIP_MODE_NON_FIP: | |
321 | mutex_unlock(&fip->ctlr_mutex); | |
322 | fc_linkup(fip->lp); | |
323 | fcoe_ctlr_solicit(fip, NULL); | |
324 | break; | |
325 | case FIP_MODE_VN2VN: | |
326 | fcoe_ctlr_vn_start(fip); | |
327 | mutex_unlock(&fip->ctlr_mutex); | |
328 | fc_linkup(fip->lp); | |
329 | break; | |
330 | } | |
97c8389d | 331 | } else |
fdb068c6 | 332 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
333 | } |
334 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
335 | ||
336 | /** | |
70b51aab RL |
337 | * fcoe_ctlr_reset() - Reset a FCoE controller |
338 | * @fip: The FCoE controller to reset | |
97c8389d | 339 | */ |
dd42dac4 | 340 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 341 | { |
97c8389d JE |
342 | fcoe_ctlr_reset_fcfs(fip); |
343 | del_timer(&fip->timer); | |
97c8389d JE |
344 | fip->ctlr_ka_time = 0; |
345 | fip->port_ka_time = 0; | |
346 | fip->sol_time = 0; | |
347 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
348 | fip->map_dest = 0; | |
97c8389d JE |
349 | } |
350 | ||
351 | /** | |
70b51aab RL |
352 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
353 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
354 | * |
355 | * Returns non-zero if the link was up and now isn't. | |
356 | * | |
357 | * Called from the LLD when the network link is not ready. | |
358 | * There may be multiple calls while the link is down. | |
359 | */ | |
360 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
361 | { | |
dd42dac4 JE |
362 | int link_dropped; |
363 | ||
364 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 365 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 366 | fcoe_ctlr_reset(fip); |
42913657 | 367 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 368 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 369 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
370 | |
371 | if (link_dropped) | |
372 | fc_linkdown(fip->lp); | |
373 | return link_dropped; | |
97c8389d JE |
374 | } |
375 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
376 | ||
377 | /** | |
70b51aab RL |
378 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
379 | * @fip: The FCoE controller to send the FKA on | |
380 | * @lport: libfc fc_lport to send from | |
381 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
382 | * @sa: The source MAC address | |
97c8389d JE |
383 | * |
384 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
385 | * The source MAC is the native MAC address. | |
386 | * | |
387 | * A port keep-alive is sent every 90 seconds while logged in. | |
388 | * The source MAC is the assigned mapped source address. | |
389 | * The destination is the FCF's F-port. | |
390 | */ | |
11b56188 CL |
391 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
392 | struct fc_lport *lport, | |
393 | int ports, u8 *sa) | |
97c8389d JE |
394 | { |
395 | struct sk_buff *skb; | |
396 | struct fip_kal { | |
397 | struct ethhdr eth; | |
398 | struct fip_header fip; | |
399 | struct fip_mac_desc mac; | |
400 | } __attribute__((packed)) *kal; | |
401 | struct fip_vn_desc *vn; | |
402 | u32 len; | |
403 | struct fc_lport *lp; | |
404 | struct fcoe_fcf *fcf; | |
405 | ||
406 | fcf = fip->sel_fcf; | |
407 | lp = fip->lp; | |
281ae642 | 408 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
409 | return; |
410 | ||
be276cbe | 411 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
412 | skb = dev_alloc_skb(len); |
413 | if (!skb) | |
414 | return; | |
415 | ||
416 | kal = (struct fip_kal *)skb->data; | |
417 | memset(kal, 0, len); | |
418 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
419 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
420 | kal->eth.h_proto = htons(ETH_P_FIP); | |
421 | ||
422 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
423 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
424 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
425 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 426 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 427 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
428 | if (fip->spma) |
429 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
430 | |
431 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
432 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
433 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
434 | if (ports) { |
435 | vn = (struct fip_vn_desc *)(kal + 1); | |
436 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
437 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 438 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
439 | hton24(vn->fd_fc_id, lport->port_id); |
440 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 441 | } |
97c8389d | 442 | skb_put(skb, len); |
0f491539 | 443 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
444 | skb_reset_mac_header(skb); |
445 | skb_reset_network_header(skb); | |
446 | fip->send(fip, skb); | |
447 | } | |
448 | ||
449 | /** | |
70b51aab RL |
450 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
451 | * @fip: The FCoE controller for the ELS frame | |
452 | * @dtype: The FIP descriptor type for the frame | |
453 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 454 | * @d_id: The destination port ID. |
97c8389d JE |
455 | * |
456 | * Returns non-zero error code on failure. | |
457 | * | |
458 | * The caller must check that the length is a multiple of 4. | |
459 | * | |
460 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
461 | * Headroom includes the FIP encapsulation description, FIP header, and | |
462 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
463 | */ | |
11b56188 | 464 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 465 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
466 | { |
467 | struct fip_encaps_head { | |
468 | struct ethhdr eth; | |
469 | struct fip_header fip; | |
470 | struct fip_encaps encaps; | |
471 | } __attribute__((packed)) *cap; | |
472 | struct fip_mac_desc *mac; | |
473 | struct fcoe_fcf *fcf; | |
474 | size_t dlen; | |
5a84baea | 475 | u16 fip_flags; |
97c8389d | 476 | |
97c8389d JE |
477 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
478 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
97c8389d | 479 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
480 | |
481 | if (lport->point_to_multipoint) { | |
482 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
483 | return -ENODEV; | |
484 | } else { | |
485 | fcf = fip->sel_fcf; | |
486 | if (!fcf) | |
487 | return -ENODEV; | |
488 | fip_flags = fcf->flags; | |
489 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
490 | FIP_FL_FPMA; | |
491 | if (!fip_flags) | |
492 | return -ENODEV; | |
493 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
494 | } | |
97c8389d JE |
495 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
496 | cap->eth.h_proto = htons(ETH_P_FIP); | |
497 | ||
498 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
499 | cap->fip.fip_op = htons(FIP_OP_LS); | |
500 | cap->fip.fip_subcode = FIP_SC_REQ; | |
501 | cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); | |
5a84baea | 502 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
503 | |
504 | cap->encaps.fd_desc.fip_dtype = dtype; | |
505 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
506 | ||
507 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
8b889e4f | 508 | memset(mac, 0, sizeof(*mac)); |
97c8389d JE |
509 | mac->fd_desc.fip_dtype = FIP_DT_MAC; |
510 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
593abc07 | 511 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { |
11b56188 | 512 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
593abc07 RL |
513 | } else if (fip_flags & FIP_FL_SPMA) { |
514 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
184dd345 | 515 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); |
593abc07 RL |
516 | } else { |
517 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
518 | /* FPMA only FLOGI must leave the MAC desc set to all 0s */ | |
519 | } | |
97c8389d | 520 | |
0f491539 | 521 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
522 | skb_reset_mac_header(skb); |
523 | skb_reset_network_header(skb); | |
524 | return 0; | |
525 | } | |
526 | ||
527 | /** | |
528 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
529 | * @fip: FCoE controller. | |
11b56188 | 530 | * @lport: libfc fc_lport to send from |
97c8389d JE |
531 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
532 | * | |
533 | * Returns a non-zero error code if the frame should not be sent. | |
534 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
535 | * | |
536 | * The caller must check that the length is a multiple of 4. | |
537 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 538 | * The the skb must also be an fc_frame. |
97c8389d | 539 | */ |
11b56188 CL |
540 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
541 | struct sk_buff *skb) | |
97c8389d | 542 | { |
e10f8c66 | 543 | struct fc_frame *fp; |
97c8389d JE |
544 | struct fc_frame_header *fh; |
545 | u16 old_xid; | |
546 | u8 op; | |
11b56188 | 547 | u8 mac[ETH_ALEN]; |
97c8389d | 548 | |
e10f8c66 | 549 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
550 | fh = (struct fc_frame_header *)skb->data; |
551 | op = *(u8 *)(fh + 1); | |
552 | ||
e10f8c66 | 553 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
554 | old_xid = fip->flogi_oxid; |
555 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
556 | if (fip->state == FIP_ST_AUTO) { | |
557 | if (old_xid == FC_XID_UNKNOWN) | |
558 | fip->flogi_count = 0; | |
559 | fip->flogi_count++; | |
560 | if (fip->flogi_count < 3) | |
561 | goto drop; | |
562 | fip->map_dest = 1; | |
563 | return 0; | |
564 | } | |
5f48f70e JE |
565 | if (fip->state == FIP_ST_NON_FIP) |
566 | fip->map_dest = 1; | |
567 | } | |
568 | ||
569 | if (fip->state == FIP_ST_NON_FIP) | |
570 | return 0; | |
e10f8c66 | 571 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 572 | goto drop; |
5f48f70e JE |
573 | switch (op) { |
574 | case ELS_FLOGI: | |
97c8389d JE |
575 | op = FIP_DT_FLOGI; |
576 | break; | |
577 | case ELS_FDISC: | |
578 | if (ntoh24(fh->fh_s_id)) | |
579 | return 0; | |
580 | op = FIP_DT_FDISC; | |
581 | break; | |
582 | case ELS_LOGO: | |
e10f8c66 JE |
583 | if (fip->mode == FIP_MODE_VN2VN) { |
584 | if (fip->state != FIP_ST_VNMP_UP) | |
585 | return -EINVAL; | |
586 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) | |
587 | return -EINVAL; | |
588 | } else { | |
589 | if (fip->state != FIP_ST_ENABLED) | |
590 | return 0; | |
591 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
592 | return 0; | |
593 | } | |
97c8389d JE |
594 | op = FIP_DT_LOGO; |
595 | break; | |
596 | case ELS_LS_ACC: | |
97c8389d | 597 | /* |
e10f8c66 | 598 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
599 | * from a point-to-point connection. Switch to using |
600 | * the source mac based on the SID. The destination | |
601 | * MAC in this case would have been set by receving the | |
602 | * FLOGI. | |
603 | */ | |
e10f8c66 JE |
604 | if (fip->state == FIP_ST_NON_FIP) { |
605 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
606 | return 0; | |
607 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
608 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
609 | fip->update_mac(lport, mac); | |
610 | } | |
611 | /* fall through */ | |
612 | case ELS_LS_RJT: | |
613 | op = fr_encaps(fp); | |
614 | if (op) | |
615 | break; | |
97c8389d JE |
616 | return 0; |
617 | default: | |
e10f8c66 JE |
618 | if (fip->state != FIP_ST_ENABLED && |
619 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
620 | goto drop; |
621 | return 0; | |
622 | } | |
e10f8c66 JE |
623 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
624 | op, ntoh24(fh->fh_d_id)); | |
625 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
626 | goto drop; |
627 | fip->send(fip, skb); | |
628 | return -EINPROGRESS; | |
629 | drop: | |
630 | kfree_skb(skb); | |
631 | return -EINVAL; | |
632 | } | |
633 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
634 | ||
70b51aab RL |
635 | /** |
636 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
637 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 638 | * |
f018b73a | 639 | * Called with lock held and preemption disabled. |
97c8389d | 640 | * |
8690cb83 JE |
641 | * An FCF is considered old if we have missed two advertisements. |
642 | * That is, there have been no valid advertisement from it for 2.5 | |
643 | * times its keep-alive period. | |
97c8389d JE |
644 | * |
645 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
646 | * |
647 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
648 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
649 | * |
650 | * Returns the time in jiffies for the next call. | |
97c8389d | 651 | */ |
8690cb83 | 652 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
653 | { |
654 | struct fcoe_fcf *fcf; | |
655 | struct fcoe_fcf *next; | |
8690cb83 JE |
656 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
657 | unsigned long deadline; | |
97c8389d | 658 | unsigned long sel_time = 0; |
f018b73a | 659 | struct fcoe_dev_stats *stats; |
97c8389d | 660 | |
fdb068c6 JE |
661 | stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); |
662 | ||
97c8389d | 663 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
664 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
665 | if (fip->sel_fcf == fcf) { | |
666 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
667 | stats->MissDiscAdvCount++; |
668 | printk(KERN_INFO "libfcoe: host%d: " | |
669 | "Missing Discovery Advertisement " | |
670 | "for fab %16.16llx count %lld\n", | |
671 | fip->lp->host->host_no, fcf->fabric_name, | |
672 | stats->MissDiscAdvCount); | |
673 | } else if (time_after(next_timer, deadline)) | |
674 | next_timer = deadline; | |
f3da80e7 | 675 | } |
8690cb83 JE |
676 | |
677 | deadline += fcf->fka_period; | |
d99ee45b | 678 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
679 | if (fip->sel_fcf == fcf) |
680 | fip->sel_fcf = NULL; | |
681 | list_del(&fcf->list); | |
682 | WARN_ON(!fip->fcf_count); | |
683 | fip->fcf_count--; | |
684 | kfree(fcf); | |
f018b73a | 685 | stats->VLinkFailureCount++; |
8690cb83 JE |
686 | } else { |
687 | if (time_after(next_timer, deadline)) | |
688 | next_timer = deadline; | |
689 | if (fcoe_ctlr_mtu_valid(fcf) && | |
690 | (!sel_time || time_before(sel_time, fcf->time))) | |
691 | sel_time = fcf->time; | |
97c8389d JE |
692 | } |
693 | } | |
fdb068c6 | 694 | put_cpu(); |
d99ee45b | 695 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
696 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
697 | fip->sel_time = sel_time; | |
97c8389d | 698 | } |
d99ee45b | 699 | |
8690cb83 | 700 | return next_timer; |
97c8389d JE |
701 | } |
702 | ||
703 | /** | |
70b51aab | 704 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 705 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
706 | * @skb: The received FIP advertisement frame |
707 | * @fcf: The resulting FCF entry | |
97c8389d JE |
708 | * |
709 | * Returns zero on a valid parsed advertisement, | |
710 | * otherwise returns non zero value. | |
711 | */ | |
0f51c2e5 JE |
712 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
713 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
714 | { |
715 | struct fip_header *fiph; | |
716 | struct fip_desc *desc = NULL; | |
717 | struct fip_wwn_desc *wwn; | |
718 | struct fip_fab_desc *fab; | |
719 | struct fip_fka_desc *fka; | |
720 | unsigned long t; | |
721 | size_t rlen; | |
722 | size_t dlen; | |
0a9c5d34 | 723 | u32 desc_mask; |
97c8389d JE |
724 | |
725 | memset(fcf, 0, sizeof(*fcf)); | |
726 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
727 | ||
728 | fiph = (struct fip_header *)skb->data; | |
729 | fcf->flags = ntohs(fiph->fip_flags); | |
730 | ||
0a9c5d34 BPG |
731 | /* |
732 | * mask of required descriptors. validating each one clears its bit. | |
733 | */ | |
734 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
735 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
736 | ||
97c8389d JE |
737 | rlen = ntohs(fiph->fip_dl_len) * 4; |
738 | if (rlen + sizeof(*fiph) > skb->len) | |
739 | return -EINVAL; | |
740 | ||
741 | desc = (struct fip_desc *)(fiph + 1); | |
742 | while (rlen > 0) { | |
743 | dlen = desc->fip_dlen * FIP_BPW; | |
744 | if (dlen < sizeof(*desc) || dlen > rlen) | |
745 | return -EINVAL; | |
0a9c5d34 BPG |
746 | /* Drop Adv if there are duplicate critical descriptors */ |
747 | if ((desc->fip_dtype < 32) && | |
748 | !(desc_mask & 1U << desc->fip_dtype)) { | |
749 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
750 | "Descriptors in FIP adv\n"); | |
751 | return -EINVAL; | |
752 | } | |
97c8389d JE |
753 | switch (desc->fip_dtype) { |
754 | case FIP_DT_PRI: | |
755 | if (dlen != sizeof(struct fip_pri_desc)) | |
756 | goto len_err; | |
757 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 758 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
759 | break; |
760 | case FIP_DT_MAC: | |
761 | if (dlen != sizeof(struct fip_mac_desc)) | |
762 | goto len_err; | |
763 | memcpy(fcf->fcf_mac, | |
764 | ((struct fip_mac_desc *)desc)->fd_mac, | |
765 | ETH_ALEN); | |
766 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
e10f8c66 JE |
767 | LIBFCOE_FIP_DBG(fip, |
768 | "Invalid MAC addr %pM in FIP adv\n", | |
769 | fcf->fcf_mac); | |
97c8389d JE |
770 | return -EINVAL; |
771 | } | |
0a9c5d34 | 772 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
773 | break; |
774 | case FIP_DT_NAME: | |
775 | if (dlen != sizeof(struct fip_wwn_desc)) | |
776 | goto len_err; | |
777 | wwn = (struct fip_wwn_desc *)desc; | |
778 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 779 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
780 | break; |
781 | case FIP_DT_FAB: | |
782 | if (dlen != sizeof(struct fip_fab_desc)) | |
783 | goto len_err; | |
784 | fab = (struct fip_fab_desc *)desc; | |
785 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
786 | fcf->vfid = ntohs(fab->fd_vfid); | |
787 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 788 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
789 | break; |
790 | case FIP_DT_FKA: | |
791 | if (dlen != sizeof(struct fip_fka_desc)) | |
792 | goto len_err; | |
793 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
794 | if (fka->fd_flags & FIP_FKA_ADV_D) |
795 | fcf->fd_flags = 1; | |
97c8389d JE |
796 | t = ntohl(fka->fd_fka_period); |
797 | if (t >= FCOE_CTLR_MIN_FKA) | |
798 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 799 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
800 | break; |
801 | case FIP_DT_MAP_OUI: | |
802 | case FIP_DT_FCOE_SIZE: | |
803 | case FIP_DT_FLOGI: | |
804 | case FIP_DT_FDISC: | |
805 | case FIP_DT_LOGO: | |
806 | case FIP_DT_ELP: | |
807 | default: | |
0f51c2e5 | 808 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 809 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
810 | /* standard says ignore unknown descriptors >= 128 */ |
811 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
812 | return -EINVAL; | |
1508f3ec | 813 | break; |
97c8389d JE |
814 | } |
815 | desc = (struct fip_desc *)((char *)desc + dlen); | |
816 | rlen -= dlen; | |
817 | } | |
818 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
819 | return -EINVAL; | |
820 | if (!fcf->switch_name || !fcf->fabric_name) | |
821 | return -EINVAL; | |
0a9c5d34 BPG |
822 | if (desc_mask) { |
823 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
824 | desc_mask); | |
825 | return -EINVAL; | |
826 | } | |
97c8389d JE |
827 | return 0; |
828 | ||
829 | len_err: | |
0f51c2e5 | 830 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 831 | desc->fip_dtype, dlen); |
97c8389d JE |
832 | return -EINVAL; |
833 | } | |
834 | ||
835 | /** | |
70b51aab RL |
836 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
837 | * @fip: The FCoE controller receiving the advertisement | |
838 | * @skb: The received FIP packet | |
97c8389d JE |
839 | */ |
840 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
841 | { | |
842 | struct fcoe_fcf *fcf; | |
843 | struct fcoe_fcf new; | |
844 | struct fcoe_fcf *found; | |
845 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
846 | int first = 0; | |
847 | int mtu_valid; | |
848 | ||
0f51c2e5 | 849 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
850 | return; |
851 | ||
fdb068c6 | 852 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
853 | first = list_empty(&fip->fcfs); |
854 | found = NULL; | |
855 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
856 | if (fcf->switch_name == new.switch_name && | |
857 | fcf->fabric_name == new.fabric_name && | |
858 | fcf->fc_map == new.fc_map && | |
859 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
860 | found = fcf; | |
861 | break; | |
862 | } | |
863 | } | |
864 | if (!found) { | |
865 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
866 | goto out; | |
867 | ||
868 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
869 | if (!fcf) | |
870 | goto out; | |
871 | ||
872 | fip->fcf_count++; | |
873 | memcpy(fcf, &new, sizeof(new)); | |
874 | list_add(&fcf->list, &fip->fcfs); | |
875 | } else { | |
876 | /* | |
c600fea2 JE |
877 | * Update the FCF's keep-alive descriptor flags. |
878 | * Other flag changes from new advertisements are | |
879 | * ignored after a solicited advertisement is | |
880 | * received and the FCF is selectable (usable). | |
97c8389d | 881 | */ |
c600fea2 JE |
882 | fcf->fd_flags = new.fd_flags; |
883 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
884 | fcf->flags = new.flags; | |
885 | ||
d99ee45b | 886 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
887 | fip->ctlr_ka_time -= fcf->fka_period; |
888 | fip->ctlr_ka_time += new.fka_period; | |
889 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
890 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 891 | } |
97c8389d JE |
892 | fcf->fka_period = new.fka_period; |
893 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
894 | } | |
895 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
896 | fcf->time = jiffies; | |
650bd12b | 897 | if (!found) { |
9f8f3aa6 CL |
898 | LIBFCOE_FIP_DBG(fip, "New FCF for fab %16.16llx " |
899 | "map %x val %d\n", | |
650bd12b RL |
900 | fcf->fabric_name, fcf->fc_map, mtu_valid); |
901 | } | |
97c8389d JE |
902 | |
903 | /* | |
904 | * If this advertisement is not solicited and our max receive size | |
905 | * hasn't been verified, send a solicited advertisement. | |
906 | */ | |
907 | if (!mtu_valid) | |
908 | fcoe_ctlr_solicit(fip, fcf); | |
909 | ||
910 | /* | |
911 | * If its been a while since we did a solicit, and this is | |
912 | * the first advertisement we've received, do a multicast | |
913 | * solicitation to gather as many advertisements as we can | |
914 | * before selection occurs. | |
915 | */ | |
916 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
917 | fcoe_ctlr_solicit(fip, NULL); | |
918 | ||
919 | /* | |
920 | * If this is the first validated FCF, note the time and | |
921 | * set a timer to trigger selection. | |
922 | */ | |
d99ee45b | 923 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 924 | fip->sel_time = jiffies + |
70b51aab | 925 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
926 | if (!timer_pending(&fip->timer) || |
927 | time_before(fip->sel_time, fip->timer.expires)) | |
928 | mod_timer(&fip->timer, fip->sel_time); | |
929 | } | |
930 | out: | |
fdb068c6 | 931 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
932 | } |
933 | ||
934 | /** | |
70b51aab RL |
935 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
936 | * @fip: The FCoE controller which received the packet | |
937 | * @skb: The received FIP packet | |
97c8389d JE |
938 | */ |
939 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
940 | { | |
70b51aab | 941 | struct fc_lport *lport = fip->lp; |
97c8389d | 942 | struct fip_header *fiph; |
11b56188 | 943 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
944 | struct fc_frame_header *fh = NULL; |
945 | struct fip_desc *desc; | |
946 | struct fip_encaps *els; | |
947 | struct fcoe_dev_stats *stats; | |
948 | enum fip_desc_type els_dtype = 0; | |
949 | u8 els_op; | |
950 | u8 sub; | |
951 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
952 | size_t els_len = 0; | |
953 | size_t rlen; | |
954 | size_t dlen; | |
be61331d BPG |
955 | u32 desc_mask = 0; |
956 | u32 desc_cnt = 0; | |
97c8389d JE |
957 | |
958 | fiph = (struct fip_header *)skb->data; | |
959 | sub = fiph->fip_subcode; | |
960 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
961 | goto drop; | |
962 | ||
963 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
964 | if (rlen + sizeof(*fiph) > skb->len) | |
965 | goto drop; | |
966 | ||
967 | desc = (struct fip_desc *)(fiph + 1); | |
968 | while (rlen > 0) { | |
be61331d | 969 | desc_cnt++; |
97c8389d JE |
970 | dlen = desc->fip_dlen * FIP_BPW; |
971 | if (dlen < sizeof(*desc) || dlen > rlen) | |
972 | goto drop; | |
0a9c5d34 BPG |
973 | /* Drop ELS if there are duplicate critical descriptors */ |
974 | if (desc->fip_dtype < 32) { | |
be61331d | 975 | if (desc_mask & 1U << desc->fip_dtype) { |
0a9c5d34 BPG |
976 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
977 | "Descriptors in FIP ELS\n"); | |
978 | goto drop; | |
979 | } | |
be61331d | 980 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 981 | } |
97c8389d JE |
982 | switch (desc->fip_dtype) { |
983 | case FIP_DT_MAC: | |
be61331d BPG |
984 | if (desc_cnt == 1) { |
985 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
986 | "received out of order\n"); | |
987 | goto drop; | |
988 | } | |
989 | ||
97c8389d JE |
990 | if (dlen != sizeof(struct fip_mac_desc)) |
991 | goto len_err; | |
992 | memcpy(granted_mac, | |
993 | ((struct fip_mac_desc *)desc)->fd_mac, | |
994 | ETH_ALEN); | |
97c8389d JE |
995 | break; |
996 | case FIP_DT_FLOGI: | |
997 | case FIP_DT_FDISC: | |
998 | case FIP_DT_LOGO: | |
999 | case FIP_DT_ELP: | |
be61331d BPG |
1000 | if (desc_cnt != 1) { |
1001 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1002 | "received out of order\n"); | |
1003 | goto drop; | |
1004 | } | |
97c8389d JE |
1005 | if (fh) |
1006 | goto drop; | |
1007 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1008 | goto len_err; | |
1009 | els_len = dlen - sizeof(*els); | |
1010 | els = (struct fip_encaps *)desc; | |
1011 | fh = (struct fc_frame_header *)(els + 1); | |
1012 | els_dtype = desc->fip_dtype; | |
1013 | break; | |
1014 | default: | |
0f51c2e5 | 1015 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1016 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
1017 | /* standard says ignore unknown descriptors >= 128 */ |
1018 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1019 | goto drop; | |
be61331d BPG |
1020 | if (desc_cnt <= 2) { |
1021 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1022 | "received out of order\n"); | |
1023 | goto drop; | |
1024 | } | |
1508f3ec | 1025 | break; |
97c8389d JE |
1026 | } |
1027 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1028 | rlen -= dlen; | |
1029 | } | |
1030 | ||
1031 | if (!fh) | |
1032 | goto drop; | |
1033 | els_op = *(u8 *)(fh + 1); | |
1034 | ||
e10f8c66 JE |
1035 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
1036 | sub == FIP_SC_REP && els_op == ELS_LS_ACC && | |
1037 | fip->mode != FIP_MODE_VN2VN) { | |
1038 | if (!is_valid_ether_addr(granted_mac)) { | |
1039 | LIBFCOE_FIP_DBG(fip, | |
1040 | "Invalid MAC address %pM in FIP ELS\n", | |
1041 | granted_mac); | |
1042 | goto drop; | |
1043 | } | |
1044 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
1045 | ||
1046 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) | |
1047 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1048 | } | |
97c8389d | 1049 | |
be61331d BPG |
1050 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1051 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1052 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1053 | "in FIP ELS\n"); | |
1054 | goto drop; | |
1055 | } | |
1056 | ||
97c8389d JE |
1057 | /* |
1058 | * Convert skb into an fc_frame containing only the ELS. | |
1059 | */ | |
1060 | skb_pull(skb, (u8 *)fh - skb->data); | |
1061 | skb_trim(skb, els_len); | |
1062 | fp = (struct fc_frame *)skb; | |
1063 | fc_frame_init(fp); | |
1064 | fr_sof(fp) = FC_SOF_I3; | |
1065 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1066 | fr_dev(fp) = lport; |
e10f8c66 | 1067 | fr_encaps(fp) = els_dtype; |
97c8389d | 1068 | |
f018b73a | 1069 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d JE |
1070 | stats->RxFrames++; |
1071 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1072 | put_cpu(); |
97c8389d | 1073 | |
70b51aab | 1074 | fc_exch_recv(lport, fp); |
97c8389d JE |
1075 | return; |
1076 | ||
1077 | len_err: | |
0f51c2e5 | 1078 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1079 | desc->fip_dtype, dlen); |
97c8389d JE |
1080 | drop: |
1081 | kfree_skb(skb); | |
1082 | } | |
1083 | ||
1084 | /** | |
70b51aab RL |
1085 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1086 | * @fip: The FCoE controller that received the frame | |
1087 | * @fh: The received FIP header | |
97c8389d JE |
1088 | * |
1089 | * There may be multiple VN_Port descriptors. | |
1090 | * The overall length has already been checked. | |
1091 | */ | |
1092 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1093 | struct fip_header *fh) |
97c8389d JE |
1094 | { |
1095 | struct fip_desc *desc; | |
1096 | struct fip_mac_desc *mp; | |
1097 | struct fip_wwn_desc *wp; | |
1098 | struct fip_vn_desc *vp; | |
1099 | size_t rlen; | |
1100 | size_t dlen; | |
1101 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1102 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1103 | struct fc_lport *vn_port = NULL; |
1104 | u32 desc_mask; | |
1105 | int is_vn_port = 0; | |
97c8389d | 1106 | |
0f51c2e5 | 1107 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1108 | |
7b2787ec | 1109 | if (!fcf || !lport->port_id) |
97c8389d JE |
1110 | return; |
1111 | ||
1112 | /* | |
1113 | * mask of required descriptors. Validating each one clears its bit. | |
1114 | */ | |
1115 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
1116 | ||
1117 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1118 | desc = (struct fip_desc *)(fh + 1); | |
1119 | while (rlen >= sizeof(*desc)) { | |
1120 | dlen = desc->fip_dlen * FIP_BPW; | |
1121 | if (dlen > rlen) | |
1122 | return; | |
0a9c5d34 BPG |
1123 | /* Drop CVL if there are duplicate critical descriptors */ |
1124 | if ((desc->fip_dtype < 32) && | |
1125 | !(desc_mask & 1U << desc->fip_dtype)) { | |
1126 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1127 | "Descriptors in FIP CVL\n"); | |
1128 | return; | |
1129 | } | |
97c8389d JE |
1130 | switch (desc->fip_dtype) { |
1131 | case FIP_DT_MAC: | |
1132 | mp = (struct fip_mac_desc *)desc; | |
1133 | if (dlen < sizeof(*mp)) | |
1134 | return; | |
1135 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
1136 | return; | |
1137 | desc_mask &= ~BIT(FIP_DT_MAC); | |
1138 | break; | |
1139 | case FIP_DT_NAME: | |
1140 | wp = (struct fip_wwn_desc *)desc; | |
1141 | if (dlen < sizeof(*wp)) | |
1142 | return; | |
1143 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
1144 | return; | |
1145 | desc_mask &= ~BIT(FIP_DT_NAME); | |
1146 | break; | |
1147 | case FIP_DT_VN_ID: | |
1148 | vp = (struct fip_vn_desc *)desc; | |
1149 | if (dlen < sizeof(*vp)) | |
1150 | return; | |
1151 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
1152 | fip->get_src_addr(lport)) == 0 && |
1153 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
5550fda7 | 1154 | ntoh24(vp->fd_fc_id) == lport->port_id) { |
97c8389d | 1155 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
5550fda7 BPG |
1156 | break; |
1157 | } | |
1158 | /* check if clr_vlink is for NPIV port */ | |
1159 | mutex_lock(&lport->lp_mutex); | |
1160 | list_for_each_entry(vn_port, &lport->vports, list) { | |
1161 | if (compare_ether_addr(vp->fd_mac, | |
1162 | fip->get_src_addr(vn_port)) == 0 && | |
1163 | (get_unaligned_be64(&vp->fd_wwpn) | |
1164 | == vn_port->wwpn) && | |
1165 | (ntoh24(vp->fd_fc_id) == | |
1166 | fc_host_port_id(vn_port->host))) { | |
1167 | desc_mask &= ~BIT(FIP_DT_VN_ID); | |
1168 | is_vn_port = 1; | |
1169 | break; | |
1170 | } | |
1171 | } | |
1172 | mutex_unlock(&lport->lp_mutex); | |
1173 | ||
97c8389d JE |
1174 | break; |
1175 | default: | |
1176 | /* standard says ignore unknown descriptors >= 128 */ | |
1177 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1178 | return; | |
1179 | break; | |
1180 | } | |
1181 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1182 | rlen -= dlen; | |
1183 | } | |
1184 | ||
1185 | /* | |
1186 | * reset only if all required descriptors were present and valid. | |
1187 | */ | |
1188 | if (desc_mask) { | |
0f51c2e5 JE |
1189 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1190 | desc_mask); | |
97c8389d | 1191 | } else { |
0f51c2e5 | 1192 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 | 1193 | |
5550fda7 BPG |
1194 | if (is_vn_port) |
1195 | fc_lport_reset(vn_port); | |
1196 | else { | |
fdb068c6 | 1197 | mutex_lock(&fip->ctlr_mutex); |
5550fda7 | 1198 | per_cpu_ptr(lport->dev_stats, |
fdb068c6 JE |
1199 | get_cpu())->VLinkFailureCount++; |
1200 | put_cpu(); | |
5550fda7 | 1201 | fcoe_ctlr_reset(fip); |
fdb068c6 | 1202 | mutex_unlock(&fip->ctlr_mutex); |
5550fda7 BPG |
1203 | |
1204 | fc_lport_reset(fip->lp); | |
1205 | fcoe_ctlr_solicit(fip, NULL); | |
1206 | } | |
97c8389d JE |
1207 | } |
1208 | } | |
1209 | ||
1210 | /** | |
70b51aab RL |
1211 | * fcoe_ctlr_recv() - Receive a FIP packet |
1212 | * @fip: The FCoE controller that received the packet | |
1213 | * @skb: The received FIP packet | |
97c8389d | 1214 | * |
1f4aed81 | 1215 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1216 | */ |
1217 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1218 | { | |
1f4aed81 | 1219 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1220 | schedule_work(&fip->recv_work); |
1221 | } | |
1222 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1223 | ||
1224 | /** | |
70b51aab RL |
1225 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1226 | * @fip: The FCoE controller that received the frame | |
1227 | * @skb: The received FIP frame | |
97c8389d JE |
1228 | * |
1229 | * Returns non-zero if the frame is dropped. | |
1230 | */ | |
1231 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1232 | { | |
1233 | struct fip_header *fiph; | |
1234 | struct ethhdr *eh; | |
1235 | enum fip_state state; | |
1236 | u16 op; | |
1237 | u8 sub; | |
1238 | ||
1239 | if (skb_linearize(skb)) | |
1240 | goto drop; | |
1241 | if (skb->len < sizeof(*fiph)) | |
1242 | goto drop; | |
1243 | eh = eth_hdr(skb); | |
e10f8c66 JE |
1244 | if (fip->mode == FIP_MODE_VN2VN) { |
1245 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1246 | compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && | |
1247 | compare_ether_addr(eh->h_dest, fcoe_all_p2p)) | |
1248 | goto drop; | |
1249 | } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1250 | compare_ether_addr(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1251 | goto drop; |
1252 | fiph = (struct fip_header *)skb->data; | |
1253 | op = ntohs(fiph->fip_op); | |
1254 | sub = fiph->fip_subcode; | |
1255 | ||
97c8389d JE |
1256 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1257 | goto drop; | |
1258 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1259 | goto drop; | |
1260 | ||
fdb068c6 | 1261 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1262 | state = fip->state; |
1263 | if (state == FIP_ST_AUTO) { | |
1264 | fip->map_dest = 0; | |
9b651da9 | 1265 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1266 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1267 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1268 | } |
fdb068c6 | 1269 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1270 | |
1271 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1272 | return fcoe_ctlr_vn_recv(fip, skb); | |
1273 | ||
1274 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && | |
1275 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1276 | goto drop; |
1277 | ||
1278 | if (op == FIP_OP_LS) { | |
1279 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1280 | return 0; | |
1281 | } | |
e10f8c66 JE |
1282 | |
1283 | if (state != FIP_ST_ENABLED) | |
1284 | goto drop; | |
1285 | ||
97c8389d JE |
1286 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1287 | fcoe_ctlr_recv_adv(fip, skb); | |
1288 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1289 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1290 | kfree_skb(skb); | |
1291 | return 0; | |
1292 | drop: | |
1293 | kfree_skb(skb); | |
1294 | return -1; | |
1295 | } | |
1296 | ||
1297 | /** | |
70b51aab RL |
1298 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1299 | * @fip: The FCoE controller | |
97c8389d JE |
1300 | * |
1301 | * If there are conflicting advertisements, no FCF can be chosen. | |
1302 | * | |
1303 | * Called with lock held. | |
1304 | */ | |
1305 | static void fcoe_ctlr_select(struct fcoe_ctlr *fip) | |
1306 | { | |
1307 | struct fcoe_fcf *fcf; | |
1308 | struct fcoe_fcf *best = NULL; | |
1309 | ||
1310 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9f8f3aa6 CL |
1311 | LIBFCOE_FIP_DBG(fip, "consider FCF for fab %16.16llx " |
1312 | "VFID %d map %x val %d\n", | |
1313 | fcf->fabric_name, fcf->vfid, | |
650bd12b | 1314 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); |
97c8389d | 1315 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1316 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1317 | "map %x %svalid %savailable\n", | |
1318 | fcf->fabric_name, fcf->fc_map, | |
1319 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1320 | (fcf->flags & FIP_FL_AVAIL) ? | |
1321 | "" : "un"); | |
97c8389d JE |
1322 | continue; |
1323 | } | |
1324 | if (!best) { | |
1325 | best = fcf; | |
1326 | continue; | |
1327 | } | |
1328 | if (fcf->fabric_name != best->fabric_name || | |
1329 | fcf->vfid != best->vfid || | |
1330 | fcf->fc_map != best->fc_map) { | |
0f51c2e5 | 1331 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " |
650bd12b | 1332 | "or FC-MAP\n"); |
97c8389d JE |
1333 | return; |
1334 | } | |
1335 | if (fcf->pri < best->pri) | |
1336 | best = fcf; | |
1337 | } | |
1338 | fip->sel_fcf = best; | |
1339 | } | |
1340 | ||
1341 | /** | |
70b51aab RL |
1342 | * fcoe_ctlr_timeout() - FIP timeout handler |
1343 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1344 | */ |
1345 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1346 | { | |
1347 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1348 | |
1349 | schedule_work(&fip->timer_work); | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1354 | * @work: Handle to a FCoE controller | |
1355 | * | |
1356 | * Ages FCFs. Triggers FCF selection if possible. | |
1357 | * Sends keep-alives and resets. | |
1358 | */ | |
1359 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1360 | { | |
1361 | struct fcoe_ctlr *fip; | |
1362 | struct fc_lport *vport; | |
1363 | u8 *mac; | |
1364 | u8 reset = 0; | |
1365 | u8 send_ctlr_ka = 0; | |
1366 | u8 send_port_ka = 0; | |
97c8389d JE |
1367 | struct fcoe_fcf *sel; |
1368 | struct fcoe_fcf *fcf; | |
8690cb83 | 1369 | unsigned long next_timer; |
97c8389d | 1370 | |
fdb068c6 | 1371 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1372 | if (fip->mode == FIP_MODE_VN2VN) |
1373 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1374 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1375 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1376 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1377 | return; |
1378 | } | |
1379 | ||
1380 | fcf = fip->sel_fcf; | |
8690cb83 | 1381 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1382 | |
1383 | sel = fip->sel_fcf; | |
8690cb83 JE |
1384 | if (!sel && fip->sel_time) { |
1385 | if (time_after_eq(jiffies, fip->sel_time)) { | |
1386 | fcoe_ctlr_select(fip); | |
1387 | sel = fip->sel_fcf; | |
1388 | fip->sel_time = 0; | |
1389 | } else if (time_after(next_timer, fip->sel_time)) | |
1390 | next_timer = fip->sel_time; | |
97c8389d JE |
1391 | } |
1392 | ||
1393 | if (sel != fcf) { | |
1394 | fcf = sel; /* the old FCF may have been freed */ | |
1395 | if (sel) { | |
650bd12b | 1396 | printk(KERN_INFO "libfcoe: host%d: FIP selected " |
66d6faec JB |
1397 | "Fibre-Channel Forwarder MAC %pM\n", |
1398 | fip->lp->host->host_no, sel->fcf_mac); | |
97c8389d JE |
1399 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); |
1400 | fip->port_ka_time = jiffies + | |
70b51aab | 1401 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
97c8389d | 1402 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
d99ee45b JE |
1403 | if (time_after(next_timer, fip->ctlr_ka_time)) |
1404 | next_timer = fip->ctlr_ka_time; | |
97c8389d | 1405 | } else { |
650bd12b | 1406 | printk(KERN_NOTICE "libfcoe: host%d: " |
70b51aab | 1407 | "FIP Fibre-Channel Forwarder timed out. " |
97c8389d JE |
1408 | "Starting FCF discovery.\n", |
1409 | fip->lp->host->host_no); | |
fdb068c6 | 1410 | reset = 1; |
97c8389d | 1411 | } |
97c8389d JE |
1412 | } |
1413 | ||
8cdffdcc | 1414 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1415 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1416 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1417 | send_ctlr_ka = 1; |
97c8389d JE |
1418 | } |
1419 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1420 | next_timer = fip->ctlr_ka_time; | |
1421 | ||
1422 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1423 | fip->port_ka_time = jiffies + |
70b51aab | 1424 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1425 | send_port_ka = 1; |
97c8389d JE |
1426 | } |
1427 | if (time_after(next_timer, fip->port_ka_time)) | |
1428 | next_timer = fip->port_ka_time; | |
97c8389d | 1429 | } |
8690cb83 JE |
1430 | if (!list_empty(&fip->fcfs)) |
1431 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1432 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1433 | |
516a6486 | 1434 | if (reset) { |
dd42dac4 | 1435 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1436 | /* restart things with a solicitation */ |
1437 | fcoe_ctlr_solicit(fip, NULL); | |
1438 | } | |
11b56188 | 1439 | |
fdb068c6 | 1440 | if (send_ctlr_ka) |
11b56188 | 1441 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1442 | |
1443 | if (send_port_ka) { | |
11b56188 CL |
1444 | mutex_lock(&fip->lp->lp_mutex); |
1445 | mac = fip->get_src_addr(fip->lp); | |
1446 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1447 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1448 | mac = fip->get_src_addr(vport); | |
1449 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1450 | } | |
1451 | mutex_unlock(&fip->lp->lp_mutex); | |
1452 | } | |
97c8389d JE |
1453 | } |
1454 | ||
1455 | /** | |
70b51aab RL |
1456 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1457 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1458 | */ |
1459 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1460 | { | |
1461 | struct fcoe_ctlr *fip; | |
1462 | struct sk_buff *skb; | |
1463 | ||
1464 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1465 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1466 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1467 | } |
1468 | ||
1469 | /** | |
386309ce | 1470 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1471 | * @fip: The FCoE controller |
1472 | * @fp: The FC frame to snoop | |
97c8389d JE |
1473 | * |
1474 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1475 | * | |
1476 | * The caller has checked that we are waiting for login as indicated | |
1477 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1478 | * | |
1479 | * The caller is responsible for freeing the frame. | |
386309ce | 1480 | * Fill in the granted_mac address. |
97c8389d JE |
1481 | * |
1482 | * Return non-zero if the frame should not be delivered to libfc. | |
1483 | */ | |
11b56188 | 1484 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1485 | struct fc_frame *fp) |
97c8389d JE |
1486 | { |
1487 | struct fc_frame_header *fh; | |
1488 | u8 op; | |
386309ce | 1489 | u8 *sa; |
97c8389d | 1490 | |
386309ce | 1491 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1492 | fh = fc_frame_header_get(fp); |
1493 | if (fh->fh_type != FC_TYPE_ELS) | |
1494 | return 0; | |
1495 | ||
1496 | op = fc_frame_payload_op(fp); | |
1497 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1498 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1499 | ||
fdb068c6 | 1500 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1501 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1502 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1503 | return -EINVAL; |
1504 | } | |
9b651da9 | 1505 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1506 | LIBFCOE_FIP_DBG(fip, |
1507 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1508 | |
1509 | /* | |
1510 | * FLOGI accepted. | |
1511 | * If the src mac addr is FC_OUI-based, then we mark the | |
1512 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1513 | * Otherwise we use the FCoE gateway addr | |
1514 | */ | |
1515 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
1516 | fip->map_dest = 1; | |
1517 | } else { | |
1518 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1519 | fip->map_dest = 0; | |
1520 | } | |
1521 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1522 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1523 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1524 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1525 | /* | |
1526 | * Save source MAC for point-to-point responses. | |
1527 | */ | |
fdb068c6 | 1528 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1529 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1530 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1531 | fip->map_dest = 0; | |
e49bf614 JE |
1532 | if (fip->state == FIP_ST_AUTO) |
1533 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1534 | "Setting non-FIP mode\n"); | |
9b651da9 | 1535 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1536 | } |
fdb068c6 | 1537 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1538 | } |
1539 | return 0; | |
1540 | } | |
1541 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1542 | ||
5e80f7f7 | 1543 | /** |
70b51aab RL |
1544 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1545 | * @mac: The MAC address to convert | |
1546 | * @scheme: The scheme to use when converting | |
1547 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1548 | * |
1549 | * Returns: u64 fc world wide name | |
1550 | */ | |
1551 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1552 | unsigned int scheme, unsigned int port) | |
1553 | { | |
1554 | u64 wwn; | |
1555 | u64 host_mac; | |
1556 | ||
1557 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1558 | host_mac = ((u64) mac[0] << 40) | | |
1559 | ((u64) mac[1] << 32) | | |
1560 | ((u64) mac[2] << 24) | | |
1561 | ((u64) mac[3] << 16) | | |
1562 | ((u64) mac[4] << 8) | | |
1563 | (u64) mac[5]; | |
1564 | ||
1565 | WARN_ON(host_mac >= (1ULL << 48)); | |
1566 | wwn = host_mac | ((u64) scheme << 60); | |
1567 | switch (scheme) { | |
1568 | case 1: | |
1569 | WARN_ON(port != 0); | |
1570 | break; | |
1571 | case 2: | |
1572 | WARN_ON(port >= 0xfff); | |
1573 | wwn |= (u64) port << 48; | |
1574 | break; | |
1575 | default: | |
1576 | WARN_ON(1); | |
1577 | break; | |
1578 | } | |
1579 | ||
1580 | return wwn; | |
1581 | } | |
1582 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1583 | ||
e10f8c66 JE |
1584 | /** |
1585 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
1586 | * @rdata: libfc remote port | |
1587 | */ | |
1588 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
1589 | { | |
1590 | return (struct fcoe_rport *)(rdata + 1); | |
1591 | } | |
1592 | ||
1593 | /** | |
1594 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
1595 | * @fip: The FCoE controller | |
1596 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
1597 | * @dest: The destination Ethernet MAC address | |
1598 | * @min_len: minimum size of the Ethernet payload to be sent | |
1599 | */ | |
1600 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
1601 | enum fip_vn2vn_subcode sub, | |
1602 | const u8 *dest, size_t min_len) | |
1603 | { | |
1604 | struct sk_buff *skb; | |
1605 | struct fip_frame { | |
1606 | struct ethhdr eth; | |
1607 | struct fip_header fip; | |
1608 | struct fip_mac_desc mac; | |
1609 | struct fip_wwn_desc wwnn; | |
1610 | struct fip_vn_desc vn; | |
1611 | } __attribute__((packed)) *frame; | |
1612 | struct fip_fc4_feat *ff; | |
1613 | struct fip_size_desc *size; | |
1614 | u32 fcp_feat; | |
1615 | size_t len; | |
1616 | size_t dlen; | |
1617 | ||
1618 | len = sizeof(*frame); | |
1619 | dlen = 0; | |
1620 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1621 | dlen = sizeof(struct fip_fc4_feat) + | |
1622 | sizeof(struct fip_size_desc); | |
1623 | len += dlen; | |
1624 | } | |
1625 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
1626 | len = max(len, min_len + sizeof(struct ethhdr)); | |
1627 | ||
1628 | skb = dev_alloc_skb(len); | |
1629 | if (!skb) | |
1630 | return; | |
1631 | ||
1632 | frame = (struct fip_frame *)skb->data; | |
1633 | memset(frame, 0, len); | |
1634 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
1635 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
1636 | frame->eth.h_proto = htons(ETH_P_FIP); | |
1637 | ||
1638 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
1639 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
1640 | frame->fip.fip_subcode = sub; | |
1641 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
1642 | ||
1643 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
1644 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
1645 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
1646 | ||
1647 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
1648 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
1649 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
1650 | ||
1651 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
1652 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
1653 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
1654 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
1655 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
1656 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
1657 | ||
1658 | /* | |
1659 | * For claims, add FC-4 features. | |
1660 | * TBD: Add interface to get fc-4 types and features from libfc. | |
1661 | */ | |
1662 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1663 | ff = (struct fip_fc4_feat *)(frame + 1); | |
1664 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
1665 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
1666 | ff->fd_fts = fip->lp->fcts; | |
1667 | ||
1668 | fcp_feat = 0; | |
1669 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
1670 | fcp_feat |= FCP_FEAT_INIT; | |
1671 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
1672 | fcp_feat |= FCP_FEAT_TARG; | |
1673 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
1674 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
1675 | ||
1676 | size = (struct fip_size_desc *)(ff + 1); | |
1677 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
1678 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
1679 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
1680 | } | |
1681 | ||
1682 | skb_put(skb, len); | |
1683 | skb->protocol = htons(ETH_P_FIP); | |
1684 | skb_reset_mac_header(skb); | |
1685 | skb_reset_network_header(skb); | |
1686 | ||
1687 | fip->send(fip, skb); | |
1688 | } | |
1689 | ||
1690 | /** | |
1691 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
1692 | * @lport: The lport which is receiving the event | |
1693 | * @rdata: remote port private data | |
1694 | * @event: The event that occured | |
1695 | * | |
1696 | * Locking Note: The rport lock must not be held when calling this function. | |
1697 | */ | |
1698 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
1699 | struct fc_rport_priv *rdata, | |
1700 | enum fc_rport_event event) | |
1701 | { | |
1702 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1703 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
1704 | ||
1705 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
1706 | rdata->ids.port_id, event); | |
1707 | ||
1708 | mutex_lock(&fip->ctlr_mutex); | |
1709 | switch (event) { | |
1710 | case RPORT_EV_READY: | |
1711 | frport->login_count = 0; | |
1712 | break; | |
1713 | case RPORT_EV_LOGO: | |
1714 | case RPORT_EV_FAILED: | |
1715 | case RPORT_EV_STOP: | |
1716 | frport->login_count++; | |
1717 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
1718 | LIBFCOE_FIP_DBG(fip, | |
1719 | "rport FLOGI limited port_id %6.6x\n", | |
1720 | rdata->ids.port_id); | |
1721 | lport->tt.rport_logoff(rdata); | |
1722 | } | |
1723 | break; | |
1724 | default: | |
1725 | break; | |
1726 | } | |
1727 | mutex_unlock(&fip->ctlr_mutex); | |
1728 | } | |
1729 | ||
1730 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
1731 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
1732 | }; | |
1733 | ||
1734 | /** | |
1735 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
1736 | * @fip: The FCoE controller | |
1737 | * | |
1738 | * Called with ctlr_mutex held. | |
1739 | */ | |
1740 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
1741 | { | |
1742 | mutex_lock(&lport->disc.disc_mutex); | |
1743 | lport->disc.disc_callback = NULL; | |
1744 | mutex_unlock(&lport->disc.disc_mutex); | |
1745 | } | |
1746 | ||
1747 | /** | |
1748 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
1749 | * @fip: The FCoE controller | |
1750 | * | |
1751 | * Called through the local port template for discovery. | |
1752 | * Called without the ctlr_mutex held. | |
1753 | */ | |
1754 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
1755 | { | |
1756 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1757 | ||
1758 | mutex_lock(&fip->ctlr_mutex); | |
1759 | fcoe_ctlr_disc_stop_locked(lport); | |
1760 | mutex_unlock(&fip->ctlr_mutex); | |
1761 | } | |
1762 | ||
1763 | /** | |
1764 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
1765 | * @fip: The FCoE controller | |
1766 | * | |
1767 | * Called through the local port template for discovery. | |
1768 | * Called without the ctlr_mutex held. | |
1769 | */ | |
1770 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
1771 | { | |
1772 | fcoe_ctlr_disc_stop(lport); | |
1773 | lport->tt.rport_flush_queue(); | |
1774 | synchronize_rcu(); | |
1775 | } | |
1776 | ||
1777 | /** | |
1778 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
1779 | * @fip: The FCoE controller | |
1780 | * | |
1781 | * Called with fcoe_ctlr lock held. | |
1782 | */ | |
1783 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
1784 | { | |
1785 | unsigned long wait; | |
1786 | u32 port_id; | |
1787 | ||
1788 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
1789 | ||
1790 | /* | |
1791 | * Get proposed port ID. | |
1792 | * If this is the first try after link up, use any previous port_id. | |
1793 | * If there was none, use the low bits of the port_name. | |
1794 | * On subsequent tries, get the next random one. | |
1795 | * Don't use reserved IDs, use another non-zero value, just as random. | |
1796 | */ | |
1797 | port_id = fip->port_id; | |
1798 | if (fip->probe_tries) | |
1799 | port_id = prandom32(&fip->rnd_state) & 0xffff; | |
1800 | else if (!port_id) | |
1801 | port_id = fip->lp->wwpn & 0xffff; | |
1802 | if (!port_id || port_id == 0xffff) | |
1803 | port_id = 1; | |
1804 | fip->port_id = port_id; | |
1805 | ||
1806 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
1807 | fip->probe_tries++; | |
1808 | wait = random32() % FIP_VN_PROBE_WAIT; | |
1809 | } else | |
1810 | wait = FIP_VN_RLIM_INT; | |
1811 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
1812 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
1813 | } | |
1814 | ||
1815 | /** | |
1816 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
1817 | * @fip: The FCoE controller | |
1818 | * | |
1819 | * Called with fcoe_ctlr lock held. | |
1820 | */ | |
1821 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
1822 | { | |
1823 | fip->probe_tries = 0; | |
1824 | prandom32_seed(&fip->rnd_state, fip->lp->wwpn); | |
1825 | fcoe_ctlr_vn_restart(fip); | |
1826 | } | |
1827 | ||
1828 | /** | |
1829 | * fcoe_ctlr_vn_parse - parse probe request or response | |
1830 | * @fip: The FCoE controller | |
1831 | * @skb: incoming packet | |
1832 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
1833 | * | |
1834 | * Returns non-zero error number on error. | |
1835 | * Does not consume the packet. | |
1836 | */ | |
1837 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
1838 | struct sk_buff *skb, | |
1839 | struct fc_rport_priv *rdata) | |
1840 | { | |
1841 | struct fip_header *fiph; | |
1842 | struct fip_desc *desc = NULL; | |
1843 | struct fip_mac_desc *macd = NULL; | |
1844 | struct fip_wwn_desc *wwn = NULL; | |
1845 | struct fip_vn_desc *vn = NULL; | |
1846 | struct fip_size_desc *size = NULL; | |
1847 | struct fcoe_rport *frport; | |
1848 | size_t rlen; | |
1849 | size_t dlen; | |
1850 | u32 desc_mask = 0; | |
1851 | u32 dtype; | |
1852 | u8 sub; | |
1853 | ||
1854 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
1855 | frport = fcoe_ctlr_rport(rdata); | |
1856 | ||
1857 | fiph = (struct fip_header *)skb->data; | |
1858 | frport->flags = ntohs(fiph->fip_flags); | |
1859 | ||
1860 | sub = fiph->fip_subcode; | |
1861 | switch (sub) { | |
1862 | case FIP_SC_VN_PROBE_REQ: | |
1863 | case FIP_SC_VN_PROBE_REP: | |
1864 | case FIP_SC_VN_BEACON: | |
1865 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
1866 | BIT(FIP_DT_VN_ID); | |
1867 | break; | |
1868 | case FIP_SC_VN_CLAIM_NOTIFY: | |
1869 | case FIP_SC_VN_CLAIM_REP: | |
1870 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
1871 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
1872 | BIT(FIP_DT_FCOE_SIZE); | |
1873 | break; | |
1874 | default: | |
1875 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
1876 | return -EINVAL; | |
1877 | } | |
1878 | ||
1879 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1880 | if (rlen + sizeof(*fiph) > skb->len) | |
1881 | return -EINVAL; | |
1882 | ||
1883 | desc = (struct fip_desc *)(fiph + 1); | |
1884 | while (rlen > 0) { | |
1885 | dlen = desc->fip_dlen * FIP_BPW; | |
1886 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1887 | return -EINVAL; | |
1888 | ||
1889 | dtype = desc->fip_dtype; | |
1890 | if (dtype < 32) { | |
1891 | if (!(desc_mask & BIT(dtype))) { | |
1892 | LIBFCOE_FIP_DBG(fip, | |
1893 | "unexpected or duplicated desc " | |
1894 | "desc type %u in " | |
1895 | "FIP VN2VN subtype %u\n", | |
1896 | dtype, sub); | |
1897 | return -EINVAL; | |
1898 | } | |
1899 | desc_mask &= ~BIT(dtype); | |
1900 | } | |
1901 | ||
1902 | switch (dtype) { | |
1903 | case FIP_DT_MAC: | |
1904 | if (dlen != sizeof(struct fip_mac_desc)) | |
1905 | goto len_err; | |
1906 | macd = (struct fip_mac_desc *)desc; | |
1907 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
1908 | LIBFCOE_FIP_DBG(fip, | |
1909 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
1910 | macd->fd_mac); | |
1911 | return -EINVAL; | |
1912 | } | |
1913 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
1914 | break; | |
1915 | case FIP_DT_NAME: | |
1916 | if (dlen != sizeof(struct fip_wwn_desc)) | |
1917 | goto len_err; | |
1918 | wwn = (struct fip_wwn_desc *)desc; | |
1919 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
1920 | break; | |
1921 | case FIP_DT_VN_ID: | |
1922 | if (dlen != sizeof(struct fip_vn_desc)) | |
1923 | goto len_err; | |
1924 | vn = (struct fip_vn_desc *)desc; | |
1925 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
1926 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
1927 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
1928 | break; | |
1929 | case FIP_DT_FC4F: | |
1930 | if (dlen != sizeof(struct fip_fc4_feat)) | |
1931 | goto len_err; | |
1932 | break; | |
1933 | case FIP_DT_FCOE_SIZE: | |
1934 | if (dlen != sizeof(struct fip_size_desc)) | |
1935 | goto len_err; | |
1936 | size = (struct fip_size_desc *)desc; | |
1937 | frport->fcoe_len = ntohs(size->fd_size); | |
1938 | break; | |
1939 | default: | |
1940 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
1941 | "in FIP probe\n", dtype); | |
1942 | /* standard says ignore unknown descriptors >= 128 */ | |
1943 | if (dtype < FIP_DT_VENDOR_BASE) | |
1944 | return -EINVAL; | |
1945 | break; | |
1946 | } | |
1947 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1948 | rlen -= dlen; | |
1949 | } | |
1950 | return 0; | |
1951 | ||
1952 | len_err: | |
1953 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
1954 | dtype, dlen); | |
1955 | return -EINVAL; | |
1956 | } | |
1957 | ||
1958 | /** | |
1959 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
1960 | * @fip: The FCoE controller | |
1961 | * | |
1962 | * Called with ctlr_mutex held. | |
1963 | */ | |
1964 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
1965 | { | |
1966 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
1967 | fip->sol_time = jiffies; | |
1968 | } | |
1969 | ||
1970 | /** | |
1971 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
1972 | * @fip: The FCoE controller | |
1973 | * @rdata: parsed remote port with frport from the probe request | |
1974 | * | |
1975 | * Called with ctlr_mutex held. | |
1976 | */ | |
1977 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
1978 | struct fc_rport_priv *rdata) | |
1979 | { | |
1980 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
1981 | ||
1982 | if (rdata->ids.port_id != fip->port_id) | |
1983 | return; | |
1984 | ||
1985 | switch (fip->state) { | |
1986 | case FIP_ST_VNMP_CLAIM: | |
1987 | case FIP_ST_VNMP_UP: | |
1988 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
1989 | frport->enode_mac, 0); | |
1990 | break; | |
1991 | case FIP_ST_VNMP_PROBE1: | |
1992 | case FIP_ST_VNMP_PROBE2: | |
1993 | /* | |
1994 | * Decide whether to reply to the Probe. | |
1995 | * Our selected address is never a "recorded" one, so | |
1996 | * only reply if our WWPN is greater and the | |
1997 | * Probe's REC bit is not set. | |
1998 | * If we don't reply, we will change our address. | |
1999 | */ | |
2000 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2001 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
2002 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2003 | frport->enode_mac, 0); | |
2004 | break; | |
2005 | } | |
2006 | /* fall through */ | |
2007 | case FIP_ST_VNMP_START: | |
2008 | fcoe_ctlr_vn_restart(fip); | |
2009 | break; | |
2010 | default: | |
2011 | break; | |
2012 | } | |
2013 | } | |
2014 | ||
2015 | /** | |
2016 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2017 | * @fip: The FCoE controller | |
2018 | * @rdata: parsed remote port with frport from the probe request | |
2019 | * | |
2020 | * Called with ctlr_mutex held. | |
2021 | */ | |
2022 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2023 | struct fc_rport_priv *rdata) | |
2024 | { | |
2025 | if (rdata->ids.port_id != fip->port_id) | |
2026 | return; | |
2027 | switch (fip->state) { | |
2028 | case FIP_ST_VNMP_START: | |
2029 | case FIP_ST_VNMP_PROBE1: | |
2030 | case FIP_ST_VNMP_PROBE2: | |
2031 | case FIP_ST_VNMP_CLAIM: | |
2032 | fcoe_ctlr_vn_restart(fip); | |
2033 | break; | |
2034 | case FIP_ST_VNMP_UP: | |
2035 | fcoe_ctlr_vn_send_claim(fip); | |
2036 | break; | |
2037 | default: | |
2038 | break; | |
2039 | } | |
2040 | } | |
2041 | ||
2042 | /** | |
2043 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2044 | * @fip: The FCoE controller | |
2045 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2046 | * | |
2047 | * Called with ctlr_mutex held. | |
2048 | */ | |
2049 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2050 | { | |
2051 | struct fc_lport *lport = fip->lp; | |
2052 | struct fc_rport_priv *rdata; | |
2053 | struct fc_rport_identifiers *ids; | |
2054 | struct fcoe_rport *frport; | |
2055 | u32 port_id; | |
2056 | ||
2057 | port_id = new->ids.port_id; | |
2058 | if (port_id == fip->port_id) | |
2059 | return; | |
2060 | ||
2061 | mutex_lock(&lport->disc.disc_mutex); | |
2062 | rdata = lport->tt.rport_create(lport, port_id); | |
2063 | if (!rdata) { | |
2064 | mutex_unlock(&lport->disc.disc_mutex); | |
2065 | return; | |
2066 | } | |
2067 | ||
2068 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2069 | rdata->disc_id = lport->disc.disc_id; | |
2070 | ||
2071 | ids = &rdata->ids; | |
2072 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
2073 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) | |
2074 | lport->tt.rport_logoff(rdata); | |
2075 | ids->port_name = new->ids.port_name; | |
2076 | ids->node_name = new->ids.node_name; | |
2077 | mutex_unlock(&lport->disc.disc_mutex); | |
2078 | ||
2079 | frport = fcoe_ctlr_rport(rdata); | |
2080 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", | |
2081 | port_id, frport->fcoe_len ? "old" : "new"); | |
2082 | *frport = *fcoe_ctlr_rport(new); | |
2083 | frport->time = 0; | |
2084 | } | |
2085 | ||
2086 | /** | |
2087 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2088 | * @fip: The FCoE controller | |
2089 | * @port_id: The port_id of the remote VN_node | |
2090 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2091 | * | |
2092 | * Returns non-zero error if no remote port found. | |
2093 | */ | |
2094 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2095 | { | |
2096 | struct fc_lport *lport = fip->lp; | |
2097 | struct fc_rport_priv *rdata; | |
2098 | struct fcoe_rport *frport; | |
2099 | int ret = -1; | |
2100 | ||
2101 | rcu_read_lock(); | |
2102 | rdata = lport->tt.rport_lookup(lport, port_id); | |
2103 | if (rdata) { | |
2104 | frport = fcoe_ctlr_rport(rdata); | |
2105 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2106 | ret = 0; | |
2107 | } | |
2108 | rcu_read_unlock(); | |
2109 | return ret; | |
2110 | } | |
2111 | ||
2112 | /** | |
2113 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2114 | * @fip: The FCoE controller | |
2115 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2116 | * | |
2117 | * Called with ctlr_mutex held. | |
2118 | */ | |
2119 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2120 | struct fc_rport_priv *new) | |
2121 | { | |
2122 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2123 | ||
2124 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2125 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2126 | return; | |
2127 | } | |
2128 | switch (fip->state) { | |
2129 | case FIP_ST_VNMP_START: | |
2130 | case FIP_ST_VNMP_PROBE1: | |
2131 | case FIP_ST_VNMP_PROBE2: | |
2132 | if (new->ids.port_id == fip->port_id) | |
2133 | fcoe_ctlr_vn_restart(fip); | |
2134 | break; | |
2135 | case FIP_ST_VNMP_CLAIM: | |
2136 | case FIP_ST_VNMP_UP: | |
2137 | if (new->ids.port_id == fip->port_id) { | |
2138 | if (new->ids.port_name > fip->lp->wwpn) { | |
2139 | fcoe_ctlr_vn_restart(fip); | |
2140 | break; | |
2141 | } | |
2142 | fcoe_ctlr_vn_send_claim(fip); | |
2143 | break; | |
2144 | } | |
2145 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, | |
2146 | min((u32)frport->fcoe_len, | |
2147 | fcoe_ctlr_fcoe_size(fip))); | |
2148 | fcoe_ctlr_vn_add(fip, new); | |
2149 | break; | |
2150 | default: | |
2151 | break; | |
2152 | } | |
2153 | } | |
2154 | ||
2155 | /** | |
2156 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2157 | * @fip: The FCoE controller that received the frame | |
2158 | * @new: newly-parsed remote port with frport from the Claim Response | |
2159 | * | |
2160 | * Called with ctlr_mutex held. | |
2161 | */ | |
2162 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2163 | struct fc_rport_priv *new) | |
2164 | { | |
2165 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2166 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2167 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2168 | fcoe_ctlr_vn_add(fip, new); | |
2169 | } | |
2170 | ||
2171 | /** | |
2172 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2173 | * @fip: The FCoE controller that received the frame | |
2174 | * @new: newly-parsed remote port with frport from the Beacon | |
2175 | * | |
2176 | * Called with ctlr_mutex held. | |
2177 | */ | |
2178 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2179 | struct fc_rport_priv *new) | |
2180 | { | |
2181 | struct fc_lport *lport = fip->lp; | |
2182 | struct fc_rport_priv *rdata; | |
2183 | struct fcoe_rport *frport; | |
2184 | ||
2185 | frport = fcoe_ctlr_rport(new); | |
2186 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2187 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2188 | return; | |
2189 | } | |
2190 | mutex_lock(&lport->disc.disc_mutex); | |
2191 | rdata = lport->tt.rport_lookup(lport, new->ids.port_id); | |
2192 | if (rdata) | |
2193 | kref_get(&rdata->kref); | |
2194 | mutex_unlock(&lport->disc.disc_mutex); | |
2195 | if (rdata) { | |
2196 | if (rdata->ids.node_name == new->ids.node_name && | |
2197 | rdata->ids.port_name == new->ids.port_name) { | |
2198 | frport = fcoe_ctlr_rport(rdata); | |
2199 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) | |
2200 | lport->tt.rport_login(rdata); | |
2201 | frport->time = jiffies; | |
2202 | } | |
2203 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
2204 | return; | |
2205 | } | |
2206 | if (fip->state != FIP_ST_VNMP_UP) | |
2207 | return; | |
2208 | ||
2209 | /* | |
2210 | * Beacon from a new neighbor. | |
2211 | * Send a claim notify if one hasn't been sent recently. | |
2212 | * Don't add the neighbor yet. | |
2213 | */ | |
2214 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2215 | new->ids.port_id); | |
2216 | if (time_after(jiffies, | |
2217 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2218 | fcoe_ctlr_vn_send_claim(fip); | |
2219 | } | |
2220 | ||
2221 | /** | |
2222 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2223 | * @fip: The FCoE controller | |
2224 | * | |
2225 | * Called with ctlr_mutex held. | |
2226 | * Called only in state FIP_ST_VNMP_UP. | |
2227 | * Returns the soonest time for next age-out or a time far in the future. | |
2228 | */ | |
2229 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2230 | { | |
2231 | struct fc_lport *lport = fip->lp; | |
2232 | struct fc_rport_priv *rdata; | |
2233 | struct fcoe_rport *frport; | |
2234 | unsigned long next_time; | |
2235 | unsigned long deadline; | |
2236 | ||
2237 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
2238 | mutex_lock(&lport->disc.disc_mutex); | |
2239 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { | |
2240 | frport = fcoe_ctlr_rport(rdata); | |
2241 | if (!frport->time) | |
2242 | continue; | |
2243 | deadline = frport->time + | |
2244 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2245 | if (time_after_eq(jiffies, deadline)) { | |
2246 | frport->time = 0; | |
2247 | LIBFCOE_FIP_DBG(fip, | |
2248 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2249 | rdata->ids.port_name, rdata->ids.port_id); | |
2250 | lport->tt.rport_logoff(rdata); | |
2251 | } else if (time_before(deadline, next_time)) | |
2252 | next_time = deadline; | |
2253 | } | |
2254 | mutex_unlock(&lport->disc.disc_mutex); | |
2255 | return next_time; | |
2256 | } | |
2257 | ||
2258 | /** | |
2259 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2260 | * @fip: The FCoE controller that received the frame | |
2261 | * @skb: The received FIP frame | |
2262 | * | |
2263 | * Returns non-zero if the frame is dropped. | |
2264 | * Always consumes the frame. | |
2265 | */ | |
2266 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2267 | { | |
2268 | struct fip_header *fiph; | |
2269 | enum fip_vn2vn_subcode sub; | |
2270 | union { | |
2271 | struct fc_rport_priv rdata; | |
2272 | struct fcoe_rport frport; | |
2273 | } buf; | |
2274 | int rc; | |
2275 | ||
2276 | fiph = (struct fip_header *)skb->data; | |
2277 | sub = fiph->fip_subcode; | |
2278 | ||
2279 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); | |
2280 | if (rc) { | |
2281 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2282 | goto drop; | |
2283 | } | |
2284 | ||
2285 | mutex_lock(&fip->ctlr_mutex); | |
2286 | switch (sub) { | |
2287 | case FIP_SC_VN_PROBE_REQ: | |
2288 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2289 | break; | |
2290 | case FIP_SC_VN_PROBE_REP: | |
2291 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2292 | break; | |
2293 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2294 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2295 | break; | |
2296 | case FIP_SC_VN_CLAIM_REP: | |
2297 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2298 | break; | |
2299 | case FIP_SC_VN_BEACON: | |
2300 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2301 | break; | |
2302 | default: | |
2303 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2304 | rc = -1; | |
2305 | break; | |
2306 | } | |
2307 | mutex_unlock(&fip->ctlr_mutex); | |
2308 | drop: | |
2309 | kfree_skb(skb); | |
2310 | return rc; | |
2311 | } | |
2312 | ||
2313 | /** | |
2314 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
2315 | * @fip: The FCoE controller | |
2316 | * | |
2317 | * This should never be called since we don't see RSCNs or other | |
2318 | * fabric-generated ELSes. | |
2319 | */ | |
2320 | static void fcoe_ctlr_disc_recv(struct fc_seq *seq, struct fc_frame *fp, | |
2321 | struct fc_lport *lport) | |
2322 | { | |
2323 | struct fc_seq_els_data rjt_data; | |
2324 | ||
2325 | rjt_data.fp = NULL; | |
2326 | rjt_data.reason = ELS_RJT_UNSUP; | |
2327 | rjt_data.explan = ELS_EXPL_NONE; | |
2328 | lport->tt.seq_els_rsp_send(seq, ELS_LS_RJT, &rjt_data); | |
2329 | fc_frame_free(fp); | |
2330 | } | |
2331 | ||
2332 | /** | |
2333 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
2334 | * @fip: The FCoE controller | |
2335 | * | |
2336 | * This sets a flag indicating that remote ports should be created | |
2337 | * and started for the peers we discover. We use the disc_callback | |
2338 | * pointer as that flag. Peers already discovered are created here. | |
2339 | * | |
2340 | * The lport lock is held during this call. The callback must be done | |
2341 | * later, without holding either the lport or discovery locks. | |
2342 | * The fcoe_ctlr lock may also be held during this call. | |
2343 | */ | |
2344 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
2345 | enum fc_disc_event), | |
2346 | struct fc_lport *lport) | |
2347 | { | |
2348 | struct fc_disc *disc = &lport->disc; | |
2349 | struct fcoe_ctlr *fip = disc->priv; | |
2350 | ||
2351 | mutex_lock(&disc->disc_mutex); | |
2352 | disc->disc_callback = callback; | |
2353 | disc->disc_id = (disc->disc_id + 2) | 1; | |
2354 | disc->pending = 1; | |
2355 | schedule_work(&fip->timer_work); | |
2356 | mutex_unlock(&disc->disc_mutex); | |
2357 | } | |
2358 | ||
2359 | /** | |
2360 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
2361 | * @fip: The FCoE controller | |
2362 | * | |
2363 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
2364 | * we've received at least one beacon. | |
2365 | * Performs the discovery complete callback. | |
2366 | */ | |
2367 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
2368 | { | |
2369 | struct fc_lport *lport = fip->lp; | |
2370 | struct fc_disc *disc = &lport->disc; | |
2371 | struct fc_rport_priv *rdata; | |
2372 | struct fcoe_rport *frport; | |
2373 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
2374 | ||
2375 | mutex_lock(&disc->disc_mutex); | |
2376 | callback = disc->pending ? disc->disc_callback : NULL; | |
2377 | disc->pending = 0; | |
2378 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
2379 | frport = fcoe_ctlr_rport(rdata); | |
2380 | if (frport->time) | |
2381 | lport->tt.rport_login(rdata); | |
2382 | } | |
2383 | mutex_unlock(&disc->disc_mutex); | |
2384 | if (callback) | |
2385 | callback(lport, DISC_EV_SUCCESS); | |
2386 | } | |
2387 | ||
2388 | /** | |
2389 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
2390 | * @fip: The FCoE controller | |
2391 | */ | |
2392 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
2393 | { | |
2394 | unsigned long next_time; | |
2395 | u8 mac[ETH_ALEN]; | |
2396 | u32 new_port_id = 0; | |
2397 | ||
2398 | mutex_lock(&fip->ctlr_mutex); | |
2399 | switch (fip->state) { | |
2400 | case FIP_ST_VNMP_START: | |
2401 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
2402 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2403 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
2404 | break; | |
2405 | case FIP_ST_VNMP_PROBE1: | |
2406 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
2407 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2408 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2409 | break; | |
2410 | case FIP_ST_VNMP_PROBE2: | |
2411 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
2412 | new_port_id = fip->port_id; | |
2413 | hton24(mac, FIP_VN_FC_MAP); | |
2414 | hton24(mac + 3, new_port_id); | |
2415 | fip->update_mac(fip->lp, mac); | |
2416 | fcoe_ctlr_vn_send_claim(fip); | |
2417 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2418 | break; | |
2419 | case FIP_ST_VNMP_CLAIM: | |
2420 | /* | |
2421 | * This may be invoked either by starting discovery so don't | |
2422 | * go to the next state unless it's been long enough. | |
2423 | */ | |
2424 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2425 | if (time_after_eq(jiffies, next_time)) { | |
2426 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
2427 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2428 | fcoe_all_vn2vn, 0); | |
2429 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2430 | fip->port_ka_time = next_time; | |
2431 | } | |
2432 | fcoe_ctlr_vn_disc(fip); | |
2433 | break; | |
2434 | case FIP_ST_VNMP_UP: | |
2435 | next_time = fcoe_ctlr_vn_age(fip); | |
2436 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
2437 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2438 | fcoe_all_vn2vn, 0); | |
2439 | fip->port_ka_time = jiffies + | |
2440 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
2441 | (random32() % FIP_VN_BEACON_FUZZ)); | |
2442 | } | |
2443 | if (time_before(fip->port_ka_time, next_time)) | |
2444 | next_time = fip->port_ka_time; | |
2445 | break; | |
2446 | case FIP_ST_LINK_WAIT: | |
2447 | goto unlock; | |
2448 | default: | |
2449 | WARN(1, "unexpected state %d", fip->state); | |
2450 | goto unlock; | |
2451 | } | |
2452 | mod_timer(&fip->timer, next_time); | |
2453 | unlock: | |
2454 | mutex_unlock(&fip->ctlr_mutex); | |
2455 | ||
2456 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
2457 | if (new_port_id) | |
2458 | fc_lport_set_local_id(fip->lp, new_port_id); | |
2459 | } | |
2460 | ||
5e80f7f7 | 2461 | /** |
70b51aab RL |
2462 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
2463 | * @lp: The local port to configure libfc for | |
e10f8c66 | 2464 | * @fip: The FCoE controller in use by the local port |
70b51aab | 2465 | * @tt: The libfc function template |
e10f8c66 | 2466 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
2467 | * |
2468 | * Returns : 0 for success | |
2469 | */ | |
e10f8c66 JE |
2470 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2471 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
2472 | { |
2473 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 2474 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 2475 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 2476 | return -ENOMEM; |
70b51aab RL |
2477 | fc_exch_init(lport); |
2478 | fc_elsct_init(lport); | |
2479 | fc_lport_init(lport); | |
e10f8c66 JE |
2480 | if (fip->mode == FIP_MODE_VN2VN) |
2481 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
70b51aab | 2482 | fc_rport_init(lport); |
e10f8c66 JE |
2483 | if (fip->mode == FIP_MODE_VN2VN) { |
2484 | lport->point_to_multipoint = 1; | |
2485 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
2486 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
2487 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
2488 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
2489 | mutex_init(&lport->disc.disc_mutex); | |
2490 | INIT_LIST_HEAD(&lport->disc.rports); | |
2491 | lport->disc.priv = fip; | |
2492 | } else { | |
2493 | fc_disc_init(lport); | |
2494 | } | |
5e80f7f7 VD |
2495 | return 0; |
2496 | } | |
2497 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); |