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Commit | Line | Data |
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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
35 | #include <net/rtnetlink.h> |
36 | ||
37 | #include <scsi/fc/fc_els.h> | |
38 | #include <scsi/fc/fc_fs.h> | |
39 | #include <scsi/fc/fc_fip.h> | |
40 | #include <scsi/fc/fc_encaps.h> | |
41 | #include <scsi/fc/fc_fcoe.h> | |
5e80f7f7 VD |
42 | |
43 | #include <scsi/libfc.h> | |
97c8389d | 44 | #include <scsi/libfcoe.h> |
9b34ecff VD |
45 | |
46 | MODULE_AUTHOR("Open-FCoE.org"); | |
97c8389d | 47 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
9b34ecff | 48 | MODULE_LICENSE("GPL v2"); |
5e80f7f7 | 49 | |
97c8389d JE |
50 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
51 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
52 | ||
53 | static void fcoe_ctlr_timeout(unsigned long); | |
42913657 | 54 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d JE |
55 | static void fcoe_ctlr_recv_work(struct work_struct *); |
56 | ||
57 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; | |
58 | ||
650bd12b RL |
59 | unsigned int libfcoe_debug_logging; |
60 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
61 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
97c8389d | 62 | |
70b51aab | 63 | #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
650bd12b RL |
64 | #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
65 | ||
70b51aab RL |
66 | #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
67 | do { \ | |
68 | if (unlikely(libfcoe_debug_logging & LEVEL)) \ | |
69 | do { \ | |
70 | CMD; \ | |
71 | } while (0); \ | |
a69b06bc | 72 | } while (0) |
650bd12b RL |
73 | |
74 | #define LIBFCOE_DBG(fmt, args...) \ | |
75 | LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ | |
76 | printk(KERN_INFO "libfcoe: " fmt, ##args);) | |
97c8389d | 77 | |
0f51c2e5 | 78 | #define LIBFCOE_FIP_DBG(fip, fmt, args...) \ |
650bd12b | 79 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
0f51c2e5 JE |
80 | printk(KERN_INFO "host%d: fip: " fmt, \ |
81 | (fip)->lp->host->host_no, ##args);) | |
97c8389d | 82 | |
9b651da9 JE |
83 | static const char *fcoe_ctlr_states[] = { |
84 | [FIP_ST_DISABLED] = "DISABLED", | |
85 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
86 | [FIP_ST_AUTO] = "AUTO", | |
87 | [FIP_ST_NON_FIP] = "NON_FIP", | |
88 | [FIP_ST_ENABLED] = "ENABLED", | |
89 | }; | |
90 | ||
91 | static const char *fcoe_ctlr_state(enum fip_state state) | |
92 | { | |
93 | const char *cp = "unknown"; | |
94 | ||
95 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
96 | cp = fcoe_ctlr_states[state]; | |
97 | if (!cp) | |
98 | cp = "unknown"; | |
99 | return cp; | |
100 | } | |
101 | ||
102 | /** | |
103 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
104 | * @fip: The FCoE controller | |
105 | * @state: The new state | |
106 | */ | |
107 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
108 | { | |
109 | if (state == fip->state) | |
110 | return; | |
111 | if (fip->lp) | |
112 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
113 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
114 | fip->state = state; | |
115 | } | |
116 | ||
70b51aab RL |
117 | /** |
118 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
119 | * @fcf: The FCF to check | |
120 | * | |
97c8389d JE |
121 | * Return non-zero if FCF fcoe_size has been validated. |
122 | */ | |
123 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
124 | { | |
125 | return (fcf->flags & FIP_FL_SOL) != 0; | |
126 | } | |
127 | ||
70b51aab RL |
128 | /** |
129 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
130 | * @fcf: The FCF to check | |
131 | * | |
97c8389d JE |
132 | * Return non-zero if the FCF is usable. |
133 | */ | |
134 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
135 | { | |
136 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
137 | ||
138 | return (fcf->flags & flags) == flags; | |
139 | } | |
140 | ||
141 | /** | |
70b51aab RL |
142 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
143 | * @fip: The FCoE controller to initialize | |
97c8389d | 144 | */ |
3d902ac0 | 145 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 146 | { |
9b651da9 | 147 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 148 | fip->mode = mode; |
97c8389d | 149 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 150 | mutex_init(&fip->ctlr_mutex); |
97c8389d JE |
151 | fip->flogi_oxid = FC_XID_UNKNOWN; |
152 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 153 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
154 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
155 | skb_queue_head_init(&fip->fip_recv_list); | |
156 | } | |
157 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
158 | ||
159 | /** | |
70b51aab RL |
160 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
161 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
162 | * |
163 | * Called with &fcoe_ctlr lock held. | |
164 | */ | |
165 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
166 | { | |
167 | struct fcoe_fcf *fcf; | |
168 | struct fcoe_fcf *next; | |
169 | ||
170 | fip->sel_fcf = NULL; | |
171 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
172 | list_del(&fcf->list); | |
173 | kfree(fcf); | |
174 | } | |
175 | fip->fcf_count = 0; | |
176 | fip->sel_time = 0; | |
177 | } | |
178 | ||
179 | /** | |
70b51aab RL |
180 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
181 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
182 | * |
183 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
184 | * | |
185 | * The receive handler will have been deleted before this to guarantee | |
186 | * that no more recv_work will be scheduled. | |
187 | * | |
188 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
189 | * This guarantees that no further timeouts or work will be scheduled. | |
190 | */ | |
191 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
192 | { | |
a4b7cfae | 193 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 194 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 195 | |
fdb068c6 | 196 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 197 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 198 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 199 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 200 | del_timer_sync(&fip->timer); |
42913657 | 201 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
202 | } |
203 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
204 | ||
205 | /** | |
70b51aab RL |
206 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
207 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
208 | * |
209 | * Returns the maximum packet size including the FCoE header and trailer, | |
210 | * but not including any Ethernet or VLAN headers. | |
211 | */ | |
212 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
213 | { | |
214 | /* | |
215 | * Determine the max FCoE frame size allowed, including | |
216 | * FCoE header and trailer. | |
217 | * Note: lp->mfs is currently the payload size, not the frame size. | |
218 | */ | |
219 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
220 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
221 | } | |
222 | ||
223 | /** | |
70b51aab RL |
224 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
225 | * @fip: The FCoE controller to send the solicitation on | |
226 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
227 | */ |
228 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
229 | { | |
230 | struct sk_buff *skb; | |
231 | struct fip_sol { | |
232 | struct ethhdr eth; | |
233 | struct fip_header fip; | |
234 | struct { | |
235 | struct fip_mac_desc mac; | |
236 | struct fip_wwn_desc wwnn; | |
237 | struct fip_size_desc size; | |
238 | } __attribute__((packed)) desc; | |
239 | } __attribute__((packed)) *sol; | |
240 | u32 fcoe_size; | |
241 | ||
242 | skb = dev_alloc_skb(sizeof(*sol)); | |
243 | if (!skb) | |
244 | return; | |
245 | ||
246 | sol = (struct fip_sol *)skb->data; | |
247 | ||
248 | memset(sol, 0, sizeof(*sol)); | |
249 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
250 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
251 | sol->eth.h_proto = htons(ETH_P_FIP); | |
252 | ||
253 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
254 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
255 | sol->fip.fip_subcode = FIP_SC_SOL; | |
256 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
257 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
258 | if (fip->spma) |
259 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
260 | |
261 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
262 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
263 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
264 | ||
265 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
266 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
267 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
268 | ||
269 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
270 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
271 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
272 | sol->desc.size.fd_size = htons(fcoe_size); | |
273 | ||
274 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 275 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
276 | skb_reset_mac_header(skb); |
277 | skb_reset_network_header(skb); | |
278 | fip->send(fip, skb); | |
279 | ||
280 | if (!fcf) | |
281 | fip->sol_time = jiffies; | |
282 | } | |
283 | ||
284 | /** | |
70b51aab RL |
285 | * fcoe_ctlr_link_up() - Start FCoE controller |
286 | * @fip: The FCoE controller to start | |
97c8389d JE |
287 | * |
288 | * Called from the LLD when the network link is ready. | |
289 | */ | |
290 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
291 | { | |
fdb068c6 | 292 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 293 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 294 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
295 | fc_linkup(fip->lp); |
296 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 297 | fcoe_ctlr_set_state(fip, fip->mode); |
fdb068c6 | 298 | mutex_unlock(&fip->ctlr_mutex); |
22bcd225 | 299 | if (fip->state == FIP_ST_AUTO) |
0f51c2e5 | 300 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
97c8389d JE |
301 | fc_linkup(fip->lp); |
302 | fcoe_ctlr_solicit(fip, NULL); | |
303 | } else | |
fdb068c6 | 304 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
305 | } |
306 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
307 | ||
308 | /** | |
70b51aab RL |
309 | * fcoe_ctlr_reset() - Reset a FCoE controller |
310 | * @fip: The FCoE controller to reset | |
97c8389d | 311 | */ |
dd42dac4 | 312 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 313 | { |
97c8389d JE |
314 | fcoe_ctlr_reset_fcfs(fip); |
315 | del_timer(&fip->timer); | |
97c8389d JE |
316 | fip->ctlr_ka_time = 0; |
317 | fip->port_ka_time = 0; | |
318 | fip->sol_time = 0; | |
319 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
320 | fip->map_dest = 0; | |
97c8389d JE |
321 | } |
322 | ||
323 | /** | |
70b51aab RL |
324 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
325 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
326 | * |
327 | * Returns non-zero if the link was up and now isn't. | |
328 | * | |
329 | * Called from the LLD when the network link is not ready. | |
330 | * There may be multiple calls while the link is down. | |
331 | */ | |
332 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
333 | { | |
dd42dac4 JE |
334 | int link_dropped; |
335 | ||
336 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 337 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 338 | fcoe_ctlr_reset(fip); |
42913657 | 339 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 340 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 341 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
342 | |
343 | if (link_dropped) | |
344 | fc_linkdown(fip->lp); | |
345 | return link_dropped; | |
97c8389d JE |
346 | } |
347 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
348 | ||
349 | /** | |
70b51aab RL |
350 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
351 | * @fip: The FCoE controller to send the FKA on | |
352 | * @lport: libfc fc_lport to send from | |
353 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
354 | * @sa: The source MAC address | |
97c8389d JE |
355 | * |
356 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
357 | * The source MAC is the native MAC address. | |
358 | * | |
359 | * A port keep-alive is sent every 90 seconds while logged in. | |
360 | * The source MAC is the assigned mapped source address. | |
361 | * The destination is the FCF's F-port. | |
362 | */ | |
11b56188 CL |
363 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
364 | struct fc_lport *lport, | |
365 | int ports, u8 *sa) | |
97c8389d JE |
366 | { |
367 | struct sk_buff *skb; | |
368 | struct fip_kal { | |
369 | struct ethhdr eth; | |
370 | struct fip_header fip; | |
371 | struct fip_mac_desc mac; | |
372 | } __attribute__((packed)) *kal; | |
373 | struct fip_vn_desc *vn; | |
374 | u32 len; | |
375 | struct fc_lport *lp; | |
376 | struct fcoe_fcf *fcf; | |
377 | ||
378 | fcf = fip->sel_fcf; | |
379 | lp = fip->lp; | |
281ae642 | 380 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
381 | return; |
382 | ||
be276cbe | 383 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
384 | skb = dev_alloc_skb(len); |
385 | if (!skb) | |
386 | return; | |
387 | ||
388 | kal = (struct fip_kal *)skb->data; | |
389 | memset(kal, 0, len); | |
390 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
391 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
392 | kal->eth.h_proto = htons(ETH_P_FIP); | |
393 | ||
394 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
395 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
396 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
397 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 398 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 399 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
400 | if (fip->spma) |
401 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
402 | |
403 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
404 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
405 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
406 | if (ports) { |
407 | vn = (struct fip_vn_desc *)(kal + 1); | |
408 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
409 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 410 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
411 | hton24(vn->fd_fc_id, lport->port_id); |
412 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 413 | } |
97c8389d | 414 | skb_put(skb, len); |
0f491539 | 415 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
416 | skb_reset_mac_header(skb); |
417 | skb_reset_network_header(skb); | |
418 | fip->send(fip, skb); | |
419 | } | |
420 | ||
421 | /** | |
70b51aab RL |
422 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
423 | * @fip: The FCoE controller for the ELS frame | |
424 | * @dtype: The FIP descriptor type for the frame | |
425 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
97c8389d JE |
426 | * |
427 | * Returns non-zero error code on failure. | |
428 | * | |
429 | * The caller must check that the length is a multiple of 4. | |
430 | * | |
431 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
432 | * Headroom includes the FIP encapsulation description, FIP header, and | |
433 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
434 | */ | |
11b56188 | 435 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
97c8389d JE |
436 | u8 dtype, struct sk_buff *skb) |
437 | { | |
438 | struct fip_encaps_head { | |
439 | struct ethhdr eth; | |
440 | struct fip_header fip; | |
441 | struct fip_encaps encaps; | |
442 | } __attribute__((packed)) *cap; | |
443 | struct fip_mac_desc *mac; | |
444 | struct fcoe_fcf *fcf; | |
445 | size_t dlen; | |
5a84baea | 446 | u16 fip_flags; |
97c8389d JE |
447 | |
448 | fcf = fip->sel_fcf; | |
449 | if (!fcf) | |
450 | return -ENODEV; | |
5a84baea YZ |
451 | |
452 | /* set flags according to both FCF and lport's capability on SPMA */ | |
453 | fip_flags = fcf->flags; | |
454 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; | |
455 | if (!fip_flags) | |
456 | return -ENODEV; | |
457 | ||
97c8389d JE |
458 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
459 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
460 | ||
461 | memset(cap, 0, sizeof(*cap)); | |
462 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
463 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
464 | cap->eth.h_proto = htons(ETH_P_FIP); | |
465 | ||
466 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
467 | cap->fip.fip_op = htons(FIP_OP_LS); | |
468 | cap->fip.fip_subcode = FIP_SC_REQ; | |
469 | cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); | |
5a84baea | 470 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
471 | |
472 | cap->encaps.fd_desc.fip_dtype = dtype; | |
473 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
474 | ||
475 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
8b889e4f | 476 | memset(mac, 0, sizeof(*mac)); |
97c8389d JE |
477 | mac->fd_desc.fip_dtype = FIP_DT_MAC; |
478 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
593abc07 | 479 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { |
11b56188 | 480 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
593abc07 RL |
481 | } else if (fip_flags & FIP_FL_SPMA) { |
482 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
184dd345 | 483 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); |
593abc07 RL |
484 | } else { |
485 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
486 | /* FPMA only FLOGI must leave the MAC desc set to all 0s */ | |
487 | } | |
97c8389d | 488 | |
0f491539 | 489 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
490 | skb_reset_mac_header(skb); |
491 | skb_reset_network_header(skb); | |
492 | return 0; | |
493 | } | |
494 | ||
495 | /** | |
496 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
497 | * @fip: FCoE controller. | |
11b56188 | 498 | * @lport: libfc fc_lport to send from |
97c8389d JE |
499 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
500 | * | |
501 | * Returns a non-zero error code if the frame should not be sent. | |
502 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
503 | * | |
504 | * The caller must check that the length is a multiple of 4. | |
505 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
506 | */ | |
11b56188 CL |
507 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
508 | struct sk_buff *skb) | |
97c8389d JE |
509 | { |
510 | struct fc_frame_header *fh; | |
511 | u16 old_xid; | |
512 | u8 op; | |
11b56188 | 513 | u8 mac[ETH_ALEN]; |
97c8389d | 514 | |
97c8389d JE |
515 | fh = (struct fc_frame_header *)skb->data; |
516 | op = *(u8 *)(fh + 1); | |
517 | ||
5f48f70e | 518 | if (op == ELS_FLOGI) { |
97c8389d JE |
519 | old_xid = fip->flogi_oxid; |
520 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
521 | if (fip->state == FIP_ST_AUTO) { | |
522 | if (old_xid == FC_XID_UNKNOWN) | |
523 | fip->flogi_count = 0; | |
524 | fip->flogi_count++; | |
525 | if (fip->flogi_count < 3) | |
526 | goto drop; | |
527 | fip->map_dest = 1; | |
528 | return 0; | |
529 | } | |
5f48f70e JE |
530 | if (fip->state == FIP_ST_NON_FIP) |
531 | fip->map_dest = 1; | |
532 | } | |
533 | ||
534 | if (fip->state == FIP_ST_NON_FIP) | |
535 | return 0; | |
f31f2a1c JE |
536 | if (!fip->sel_fcf) |
537 | goto drop; | |
5f48f70e JE |
538 | |
539 | switch (op) { | |
540 | case ELS_FLOGI: | |
97c8389d JE |
541 | op = FIP_DT_FLOGI; |
542 | break; | |
543 | case ELS_FDISC: | |
544 | if (ntoh24(fh->fh_s_id)) | |
545 | return 0; | |
546 | op = FIP_DT_FDISC; | |
547 | break; | |
548 | case ELS_LOGO: | |
549 | if (fip->state != FIP_ST_ENABLED) | |
550 | return 0; | |
551 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
552 | return 0; | |
553 | op = FIP_DT_LOGO; | |
554 | break; | |
555 | case ELS_LS_ACC: | |
556 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
557 | return 0; | |
558 | if (!ntoh24(fh->fh_s_id)) | |
559 | return 0; | |
560 | if (fip->state == FIP_ST_AUTO) | |
561 | return 0; | |
562 | /* | |
563 | * Here we must've gotten an SID by accepting an FLOGI | |
564 | * from a point-to-point connection. Switch to using | |
565 | * the source mac based on the SID. The destination | |
566 | * MAC in this case would have been set by receving the | |
567 | * FLOGI. | |
568 | */ | |
569 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
11b56188 CL |
570 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
571 | fip->update_mac(lport, mac); | |
97c8389d JE |
572 | return 0; |
573 | default: | |
574 | if (fip->state != FIP_ST_ENABLED) | |
575 | goto drop; | |
576 | return 0; | |
577 | } | |
11b56188 | 578 | if (fcoe_ctlr_encaps(fip, lport, op, skb)) |
97c8389d JE |
579 | goto drop; |
580 | fip->send(fip, skb); | |
581 | return -EINPROGRESS; | |
582 | drop: | |
583 | kfree_skb(skb); | |
584 | return -EINVAL; | |
585 | } | |
586 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
587 | ||
70b51aab RL |
588 | /** |
589 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
590 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 591 | * |
f018b73a | 592 | * Called with lock held and preemption disabled. |
97c8389d | 593 | * |
8690cb83 JE |
594 | * An FCF is considered old if we have missed two advertisements. |
595 | * That is, there have been no valid advertisement from it for 2.5 | |
596 | * times its keep-alive period. | |
97c8389d JE |
597 | * |
598 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
599 | * |
600 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
601 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
602 | * |
603 | * Returns the time in jiffies for the next call. | |
97c8389d | 604 | */ |
8690cb83 | 605 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
606 | { |
607 | struct fcoe_fcf *fcf; | |
608 | struct fcoe_fcf *next; | |
8690cb83 JE |
609 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
610 | unsigned long deadline; | |
97c8389d | 611 | unsigned long sel_time = 0; |
f018b73a | 612 | struct fcoe_dev_stats *stats; |
97c8389d | 613 | |
fdb068c6 JE |
614 | stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); |
615 | ||
97c8389d | 616 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
617 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
618 | if (fip->sel_fcf == fcf) { | |
619 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
620 | stats->MissDiscAdvCount++; |
621 | printk(KERN_INFO "libfcoe: host%d: " | |
622 | "Missing Discovery Advertisement " | |
623 | "for fab %16.16llx count %lld\n", | |
624 | fip->lp->host->host_no, fcf->fabric_name, | |
625 | stats->MissDiscAdvCount); | |
626 | } else if (time_after(next_timer, deadline)) | |
627 | next_timer = deadline; | |
f3da80e7 | 628 | } |
8690cb83 JE |
629 | |
630 | deadline += fcf->fka_period; | |
d99ee45b | 631 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
632 | if (fip->sel_fcf == fcf) |
633 | fip->sel_fcf = NULL; | |
634 | list_del(&fcf->list); | |
635 | WARN_ON(!fip->fcf_count); | |
636 | fip->fcf_count--; | |
637 | kfree(fcf); | |
f018b73a | 638 | stats->VLinkFailureCount++; |
8690cb83 JE |
639 | } else { |
640 | if (time_after(next_timer, deadline)) | |
641 | next_timer = deadline; | |
642 | if (fcoe_ctlr_mtu_valid(fcf) && | |
643 | (!sel_time || time_before(sel_time, fcf->time))) | |
644 | sel_time = fcf->time; | |
97c8389d JE |
645 | } |
646 | } | |
fdb068c6 | 647 | put_cpu(); |
d99ee45b | 648 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
649 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
650 | fip->sel_time = sel_time; | |
97c8389d | 651 | } |
d99ee45b | 652 | |
8690cb83 | 653 | return next_timer; |
97c8389d JE |
654 | } |
655 | ||
656 | /** | |
70b51aab | 657 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 658 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
659 | * @skb: The received FIP advertisement frame |
660 | * @fcf: The resulting FCF entry | |
97c8389d JE |
661 | * |
662 | * Returns zero on a valid parsed advertisement, | |
663 | * otherwise returns non zero value. | |
664 | */ | |
0f51c2e5 JE |
665 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
666 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
667 | { |
668 | struct fip_header *fiph; | |
669 | struct fip_desc *desc = NULL; | |
670 | struct fip_wwn_desc *wwn; | |
671 | struct fip_fab_desc *fab; | |
672 | struct fip_fka_desc *fka; | |
673 | unsigned long t; | |
674 | size_t rlen; | |
675 | size_t dlen; | |
0a9c5d34 | 676 | u32 desc_mask; |
97c8389d JE |
677 | |
678 | memset(fcf, 0, sizeof(*fcf)); | |
679 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
680 | ||
681 | fiph = (struct fip_header *)skb->data; | |
682 | fcf->flags = ntohs(fiph->fip_flags); | |
683 | ||
0a9c5d34 BPG |
684 | /* |
685 | * mask of required descriptors. validating each one clears its bit. | |
686 | */ | |
687 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
688 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
689 | ||
97c8389d JE |
690 | rlen = ntohs(fiph->fip_dl_len) * 4; |
691 | if (rlen + sizeof(*fiph) > skb->len) | |
692 | return -EINVAL; | |
693 | ||
694 | desc = (struct fip_desc *)(fiph + 1); | |
695 | while (rlen > 0) { | |
696 | dlen = desc->fip_dlen * FIP_BPW; | |
697 | if (dlen < sizeof(*desc) || dlen > rlen) | |
698 | return -EINVAL; | |
0a9c5d34 BPG |
699 | /* Drop Adv if there are duplicate critical descriptors */ |
700 | if ((desc->fip_dtype < 32) && | |
701 | !(desc_mask & 1U << desc->fip_dtype)) { | |
702 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
703 | "Descriptors in FIP adv\n"); | |
704 | return -EINVAL; | |
705 | } | |
97c8389d JE |
706 | switch (desc->fip_dtype) { |
707 | case FIP_DT_PRI: | |
708 | if (dlen != sizeof(struct fip_pri_desc)) | |
709 | goto len_err; | |
710 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 711 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
712 | break; |
713 | case FIP_DT_MAC: | |
714 | if (dlen != sizeof(struct fip_mac_desc)) | |
715 | goto len_err; | |
716 | memcpy(fcf->fcf_mac, | |
717 | ((struct fip_mac_desc *)desc)->fd_mac, | |
718 | ETH_ALEN); | |
719 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
0f51c2e5 | 720 | LIBFCOE_FIP_DBG(fip, "Invalid MAC address " |
650bd12b | 721 | "in FIP adv\n"); |
97c8389d JE |
722 | return -EINVAL; |
723 | } | |
0a9c5d34 | 724 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
725 | break; |
726 | case FIP_DT_NAME: | |
727 | if (dlen != sizeof(struct fip_wwn_desc)) | |
728 | goto len_err; | |
729 | wwn = (struct fip_wwn_desc *)desc; | |
730 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 731 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
732 | break; |
733 | case FIP_DT_FAB: | |
734 | if (dlen != sizeof(struct fip_fab_desc)) | |
735 | goto len_err; | |
736 | fab = (struct fip_fab_desc *)desc; | |
737 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
738 | fcf->vfid = ntohs(fab->fd_vfid); | |
739 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 740 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
741 | break; |
742 | case FIP_DT_FKA: | |
743 | if (dlen != sizeof(struct fip_fka_desc)) | |
744 | goto len_err; | |
745 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
746 | if (fka->fd_flags & FIP_FKA_ADV_D) |
747 | fcf->fd_flags = 1; | |
97c8389d JE |
748 | t = ntohl(fka->fd_fka_period); |
749 | if (t >= FCOE_CTLR_MIN_FKA) | |
750 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 751 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
752 | break; |
753 | case FIP_DT_MAP_OUI: | |
754 | case FIP_DT_FCOE_SIZE: | |
755 | case FIP_DT_FLOGI: | |
756 | case FIP_DT_FDISC: | |
757 | case FIP_DT_LOGO: | |
758 | case FIP_DT_ELP: | |
759 | default: | |
0f51c2e5 | 760 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 761 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
762 | /* standard says ignore unknown descriptors >= 128 */ |
763 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
764 | return -EINVAL; | |
1508f3ec | 765 | break; |
97c8389d JE |
766 | } |
767 | desc = (struct fip_desc *)((char *)desc + dlen); | |
768 | rlen -= dlen; | |
769 | } | |
770 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
771 | return -EINVAL; | |
772 | if (!fcf->switch_name || !fcf->fabric_name) | |
773 | return -EINVAL; | |
0a9c5d34 BPG |
774 | if (desc_mask) { |
775 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
776 | desc_mask); | |
777 | return -EINVAL; | |
778 | } | |
97c8389d JE |
779 | return 0; |
780 | ||
781 | len_err: | |
0f51c2e5 | 782 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 783 | desc->fip_dtype, dlen); |
97c8389d JE |
784 | return -EINVAL; |
785 | } | |
786 | ||
787 | /** | |
70b51aab RL |
788 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
789 | * @fip: The FCoE controller receiving the advertisement | |
790 | * @skb: The received FIP packet | |
97c8389d JE |
791 | */ |
792 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
793 | { | |
794 | struct fcoe_fcf *fcf; | |
795 | struct fcoe_fcf new; | |
796 | struct fcoe_fcf *found; | |
797 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
798 | int first = 0; | |
799 | int mtu_valid; | |
800 | ||
0f51c2e5 | 801 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
802 | return; |
803 | ||
fdb068c6 | 804 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
805 | first = list_empty(&fip->fcfs); |
806 | found = NULL; | |
807 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
808 | if (fcf->switch_name == new.switch_name && | |
809 | fcf->fabric_name == new.fabric_name && | |
810 | fcf->fc_map == new.fc_map && | |
811 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
812 | found = fcf; | |
813 | break; | |
814 | } | |
815 | } | |
816 | if (!found) { | |
817 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
818 | goto out; | |
819 | ||
820 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
821 | if (!fcf) | |
822 | goto out; | |
823 | ||
824 | fip->fcf_count++; | |
825 | memcpy(fcf, &new, sizeof(new)); | |
826 | list_add(&fcf->list, &fip->fcfs); | |
827 | } else { | |
828 | /* | |
c600fea2 JE |
829 | * Update the FCF's keep-alive descriptor flags. |
830 | * Other flag changes from new advertisements are | |
831 | * ignored after a solicited advertisement is | |
832 | * received and the FCF is selectable (usable). | |
97c8389d | 833 | */ |
c600fea2 JE |
834 | fcf->fd_flags = new.fd_flags; |
835 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
836 | fcf->flags = new.flags; | |
837 | ||
d99ee45b | 838 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
839 | fip->ctlr_ka_time -= fcf->fka_period; |
840 | fip->ctlr_ka_time += new.fka_period; | |
841 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
842 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 843 | } |
97c8389d JE |
844 | fcf->fka_period = new.fka_period; |
845 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
846 | } | |
847 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
848 | fcf->time = jiffies; | |
650bd12b | 849 | if (!found) { |
9f8f3aa6 CL |
850 | LIBFCOE_FIP_DBG(fip, "New FCF for fab %16.16llx " |
851 | "map %x val %d\n", | |
650bd12b RL |
852 | fcf->fabric_name, fcf->fc_map, mtu_valid); |
853 | } | |
97c8389d JE |
854 | |
855 | /* | |
856 | * If this advertisement is not solicited and our max receive size | |
857 | * hasn't been verified, send a solicited advertisement. | |
858 | */ | |
859 | if (!mtu_valid) | |
860 | fcoe_ctlr_solicit(fip, fcf); | |
861 | ||
862 | /* | |
863 | * If its been a while since we did a solicit, and this is | |
864 | * the first advertisement we've received, do a multicast | |
865 | * solicitation to gather as many advertisements as we can | |
866 | * before selection occurs. | |
867 | */ | |
868 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
869 | fcoe_ctlr_solicit(fip, NULL); | |
870 | ||
871 | /* | |
872 | * If this is the first validated FCF, note the time and | |
873 | * set a timer to trigger selection. | |
874 | */ | |
d99ee45b | 875 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 876 | fip->sel_time = jiffies + |
70b51aab | 877 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
878 | if (!timer_pending(&fip->timer) || |
879 | time_before(fip->sel_time, fip->timer.expires)) | |
880 | mod_timer(&fip->timer, fip->sel_time); | |
881 | } | |
882 | out: | |
fdb068c6 | 883 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
884 | } |
885 | ||
886 | /** | |
70b51aab RL |
887 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
888 | * @fip: The FCoE controller which received the packet | |
889 | * @skb: The received FIP packet | |
97c8389d JE |
890 | */ |
891 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
892 | { | |
70b51aab | 893 | struct fc_lport *lport = fip->lp; |
97c8389d | 894 | struct fip_header *fiph; |
11b56188 | 895 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
896 | struct fc_frame_header *fh = NULL; |
897 | struct fip_desc *desc; | |
898 | struct fip_encaps *els; | |
899 | struct fcoe_dev_stats *stats; | |
900 | enum fip_desc_type els_dtype = 0; | |
901 | u8 els_op; | |
902 | u8 sub; | |
903 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
904 | size_t els_len = 0; | |
905 | size_t rlen; | |
906 | size_t dlen; | |
be61331d BPG |
907 | u32 desc_mask = 0; |
908 | u32 desc_cnt = 0; | |
97c8389d JE |
909 | |
910 | fiph = (struct fip_header *)skb->data; | |
911 | sub = fiph->fip_subcode; | |
912 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
913 | goto drop; | |
914 | ||
915 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
916 | if (rlen + sizeof(*fiph) > skb->len) | |
917 | goto drop; | |
918 | ||
919 | desc = (struct fip_desc *)(fiph + 1); | |
920 | while (rlen > 0) { | |
be61331d | 921 | desc_cnt++; |
97c8389d JE |
922 | dlen = desc->fip_dlen * FIP_BPW; |
923 | if (dlen < sizeof(*desc) || dlen > rlen) | |
924 | goto drop; | |
0a9c5d34 BPG |
925 | /* Drop ELS if there are duplicate critical descriptors */ |
926 | if (desc->fip_dtype < 32) { | |
be61331d | 927 | if (desc_mask & 1U << desc->fip_dtype) { |
0a9c5d34 BPG |
928 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
929 | "Descriptors in FIP ELS\n"); | |
930 | goto drop; | |
931 | } | |
be61331d | 932 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 933 | } |
97c8389d JE |
934 | switch (desc->fip_dtype) { |
935 | case FIP_DT_MAC: | |
be61331d BPG |
936 | if (desc_cnt == 1) { |
937 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
938 | "received out of order\n"); | |
939 | goto drop; | |
940 | } | |
941 | ||
97c8389d JE |
942 | if (dlen != sizeof(struct fip_mac_desc)) |
943 | goto len_err; | |
944 | memcpy(granted_mac, | |
945 | ((struct fip_mac_desc *)desc)->fd_mac, | |
946 | ETH_ALEN); | |
947 | if (!is_valid_ether_addr(granted_mac)) { | |
0f51c2e5 | 948 | LIBFCOE_FIP_DBG(fip, "Invalid MAC address " |
650bd12b | 949 | "in FIP ELS\n"); |
97c8389d JE |
950 | goto drop; |
951 | } | |
11b56188 | 952 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); |
97c8389d JE |
953 | break; |
954 | case FIP_DT_FLOGI: | |
955 | case FIP_DT_FDISC: | |
956 | case FIP_DT_LOGO: | |
957 | case FIP_DT_ELP: | |
be61331d BPG |
958 | if (desc_cnt != 1) { |
959 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
960 | "received out of order\n"); | |
961 | goto drop; | |
962 | } | |
97c8389d JE |
963 | if (fh) |
964 | goto drop; | |
965 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
966 | goto len_err; | |
967 | els_len = dlen - sizeof(*els); | |
968 | els = (struct fip_encaps *)desc; | |
969 | fh = (struct fc_frame_header *)(els + 1); | |
970 | els_dtype = desc->fip_dtype; | |
971 | break; | |
972 | default: | |
0f51c2e5 | 973 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 974 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
975 | /* standard says ignore unknown descriptors >= 128 */ |
976 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
977 | goto drop; | |
be61331d BPG |
978 | if (desc_cnt <= 2) { |
979 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
980 | "received out of order\n"); | |
981 | goto drop; | |
982 | } | |
1508f3ec | 983 | break; |
97c8389d JE |
984 | } |
985 | desc = (struct fip_desc *)((char *)desc + dlen); | |
986 | rlen -= dlen; | |
987 | } | |
988 | ||
989 | if (!fh) | |
990 | goto drop; | |
991 | els_op = *(u8 *)(fh + 1); | |
992 | ||
11b56188 CL |
993 | if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && |
994 | fip->flogi_oxid == ntohs(fh->fh_ox_id) && | |
995 | els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) | |
97c8389d | 996 | fip->flogi_oxid = FC_XID_UNKNOWN; |
97c8389d | 997 | |
be61331d BPG |
998 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
999 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1000 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1001 | "in FIP ELS\n"); | |
1002 | goto drop; | |
1003 | } | |
1004 | ||
97c8389d JE |
1005 | /* |
1006 | * Convert skb into an fc_frame containing only the ELS. | |
1007 | */ | |
1008 | skb_pull(skb, (u8 *)fh - skb->data); | |
1009 | skb_trim(skb, els_len); | |
1010 | fp = (struct fc_frame *)skb; | |
1011 | fc_frame_init(fp); | |
1012 | fr_sof(fp) = FC_SOF_I3; | |
1013 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1014 | fr_dev(fp) = lport; |
97c8389d | 1015 | |
f018b73a | 1016 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d JE |
1017 | stats->RxFrames++; |
1018 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1019 | put_cpu(); |
97c8389d | 1020 | |
70b51aab | 1021 | fc_exch_recv(lport, fp); |
97c8389d JE |
1022 | return; |
1023 | ||
1024 | len_err: | |
0f51c2e5 | 1025 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1026 | desc->fip_dtype, dlen); |
97c8389d JE |
1027 | drop: |
1028 | kfree_skb(skb); | |
1029 | } | |
1030 | ||
1031 | /** | |
70b51aab RL |
1032 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1033 | * @fip: The FCoE controller that received the frame | |
1034 | * @fh: The received FIP header | |
97c8389d JE |
1035 | * |
1036 | * There may be multiple VN_Port descriptors. | |
1037 | * The overall length has already been checked. | |
1038 | */ | |
1039 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1040 | struct fip_header *fh) |
97c8389d JE |
1041 | { |
1042 | struct fip_desc *desc; | |
1043 | struct fip_mac_desc *mp; | |
1044 | struct fip_wwn_desc *wp; | |
1045 | struct fip_vn_desc *vp; | |
1046 | size_t rlen; | |
1047 | size_t dlen; | |
1048 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1049 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1050 | struct fc_lport *vn_port = NULL; |
1051 | u32 desc_mask; | |
1052 | int is_vn_port = 0; | |
97c8389d | 1053 | |
0f51c2e5 | 1054 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1055 | |
7b2787ec | 1056 | if (!fcf || !lport->port_id) |
97c8389d JE |
1057 | return; |
1058 | ||
1059 | /* | |
1060 | * mask of required descriptors. Validating each one clears its bit. | |
1061 | */ | |
1062 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
1063 | ||
1064 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1065 | desc = (struct fip_desc *)(fh + 1); | |
1066 | while (rlen >= sizeof(*desc)) { | |
1067 | dlen = desc->fip_dlen * FIP_BPW; | |
1068 | if (dlen > rlen) | |
1069 | return; | |
0a9c5d34 BPG |
1070 | /* Drop CVL if there are duplicate critical descriptors */ |
1071 | if ((desc->fip_dtype < 32) && | |
1072 | !(desc_mask & 1U << desc->fip_dtype)) { | |
1073 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1074 | "Descriptors in FIP CVL\n"); | |
1075 | return; | |
1076 | } | |
97c8389d JE |
1077 | switch (desc->fip_dtype) { |
1078 | case FIP_DT_MAC: | |
1079 | mp = (struct fip_mac_desc *)desc; | |
1080 | if (dlen < sizeof(*mp)) | |
1081 | return; | |
1082 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
1083 | return; | |
1084 | desc_mask &= ~BIT(FIP_DT_MAC); | |
1085 | break; | |
1086 | case FIP_DT_NAME: | |
1087 | wp = (struct fip_wwn_desc *)desc; | |
1088 | if (dlen < sizeof(*wp)) | |
1089 | return; | |
1090 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
1091 | return; | |
1092 | desc_mask &= ~BIT(FIP_DT_NAME); | |
1093 | break; | |
1094 | case FIP_DT_VN_ID: | |
1095 | vp = (struct fip_vn_desc *)desc; | |
1096 | if (dlen < sizeof(*vp)) | |
1097 | return; | |
1098 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
1099 | fip->get_src_addr(lport)) == 0 && |
1100 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
5550fda7 | 1101 | ntoh24(vp->fd_fc_id) == lport->port_id) { |
97c8389d | 1102 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
5550fda7 BPG |
1103 | break; |
1104 | } | |
1105 | /* check if clr_vlink is for NPIV port */ | |
1106 | mutex_lock(&lport->lp_mutex); | |
1107 | list_for_each_entry(vn_port, &lport->vports, list) { | |
1108 | if (compare_ether_addr(vp->fd_mac, | |
1109 | fip->get_src_addr(vn_port)) == 0 && | |
1110 | (get_unaligned_be64(&vp->fd_wwpn) | |
1111 | == vn_port->wwpn) && | |
1112 | (ntoh24(vp->fd_fc_id) == | |
1113 | fc_host_port_id(vn_port->host))) { | |
1114 | desc_mask &= ~BIT(FIP_DT_VN_ID); | |
1115 | is_vn_port = 1; | |
1116 | break; | |
1117 | } | |
1118 | } | |
1119 | mutex_unlock(&lport->lp_mutex); | |
1120 | ||
97c8389d JE |
1121 | break; |
1122 | default: | |
1123 | /* standard says ignore unknown descriptors >= 128 */ | |
1124 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1125 | return; | |
1126 | break; | |
1127 | } | |
1128 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1129 | rlen -= dlen; | |
1130 | } | |
1131 | ||
1132 | /* | |
1133 | * reset only if all required descriptors were present and valid. | |
1134 | */ | |
1135 | if (desc_mask) { | |
0f51c2e5 JE |
1136 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1137 | desc_mask); | |
97c8389d | 1138 | } else { |
0f51c2e5 | 1139 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 | 1140 | |
5550fda7 BPG |
1141 | if (is_vn_port) |
1142 | fc_lport_reset(vn_port); | |
1143 | else { | |
fdb068c6 | 1144 | mutex_lock(&fip->ctlr_mutex); |
5550fda7 | 1145 | per_cpu_ptr(lport->dev_stats, |
fdb068c6 JE |
1146 | get_cpu())->VLinkFailureCount++; |
1147 | put_cpu(); | |
5550fda7 | 1148 | fcoe_ctlr_reset(fip); |
fdb068c6 | 1149 | mutex_unlock(&fip->ctlr_mutex); |
5550fda7 BPG |
1150 | |
1151 | fc_lport_reset(fip->lp); | |
1152 | fcoe_ctlr_solicit(fip, NULL); | |
1153 | } | |
97c8389d JE |
1154 | } |
1155 | } | |
1156 | ||
1157 | /** | |
70b51aab RL |
1158 | * fcoe_ctlr_recv() - Receive a FIP packet |
1159 | * @fip: The FCoE controller that received the packet | |
1160 | * @skb: The received FIP packet | |
97c8389d | 1161 | * |
1f4aed81 | 1162 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1163 | */ |
1164 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1165 | { | |
1f4aed81 | 1166 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1167 | schedule_work(&fip->recv_work); |
1168 | } | |
1169 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1170 | ||
1171 | /** | |
70b51aab RL |
1172 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1173 | * @fip: The FCoE controller that received the frame | |
1174 | * @skb: The received FIP frame | |
97c8389d JE |
1175 | * |
1176 | * Returns non-zero if the frame is dropped. | |
1177 | */ | |
1178 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1179 | { | |
1180 | struct fip_header *fiph; | |
1181 | struct ethhdr *eh; | |
1182 | enum fip_state state; | |
1183 | u16 op; | |
1184 | u8 sub; | |
1185 | ||
1186 | if (skb_linearize(skb)) | |
1187 | goto drop; | |
1188 | if (skb->len < sizeof(*fiph)) | |
1189 | goto drop; | |
1190 | eh = eth_hdr(skb); | |
1191 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1192 | compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS)) | |
1193 | goto drop; | |
1194 | fiph = (struct fip_header *)skb->data; | |
1195 | op = ntohs(fiph->fip_op); | |
1196 | sub = fiph->fip_subcode; | |
1197 | ||
97c8389d JE |
1198 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1199 | goto drop; | |
1200 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1201 | goto drop; | |
1202 | ||
fdb068c6 | 1203 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1204 | state = fip->state; |
1205 | if (state == FIP_ST_AUTO) { | |
1206 | fip->map_dest = 0; | |
9b651da9 | 1207 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1208 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1209 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1210 | } |
fdb068c6 | 1211 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1212 | if (state != FIP_ST_ENABLED) |
1213 | goto drop; | |
1214 | ||
1215 | if (op == FIP_OP_LS) { | |
1216 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1217 | return 0; | |
1218 | } | |
1219 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) | |
1220 | fcoe_ctlr_recv_adv(fip, skb); | |
1221 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1222 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1223 | kfree_skb(skb); | |
1224 | return 0; | |
1225 | drop: | |
1226 | kfree_skb(skb); | |
1227 | return -1; | |
1228 | } | |
1229 | ||
1230 | /** | |
70b51aab RL |
1231 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1232 | * @fip: The FCoE controller | |
97c8389d JE |
1233 | * |
1234 | * If there are conflicting advertisements, no FCF can be chosen. | |
1235 | * | |
1236 | * Called with lock held. | |
1237 | */ | |
1238 | static void fcoe_ctlr_select(struct fcoe_ctlr *fip) | |
1239 | { | |
1240 | struct fcoe_fcf *fcf; | |
1241 | struct fcoe_fcf *best = NULL; | |
1242 | ||
1243 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9f8f3aa6 CL |
1244 | LIBFCOE_FIP_DBG(fip, "consider FCF for fab %16.16llx " |
1245 | "VFID %d map %x val %d\n", | |
1246 | fcf->fabric_name, fcf->vfid, | |
650bd12b | 1247 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); |
97c8389d | 1248 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1249 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1250 | "map %x %svalid %savailable\n", | |
1251 | fcf->fabric_name, fcf->fc_map, | |
1252 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1253 | (fcf->flags & FIP_FL_AVAIL) ? | |
1254 | "" : "un"); | |
97c8389d JE |
1255 | continue; |
1256 | } | |
1257 | if (!best) { | |
1258 | best = fcf; | |
1259 | continue; | |
1260 | } | |
1261 | if (fcf->fabric_name != best->fabric_name || | |
1262 | fcf->vfid != best->vfid || | |
1263 | fcf->fc_map != best->fc_map) { | |
0f51c2e5 | 1264 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " |
650bd12b | 1265 | "or FC-MAP\n"); |
97c8389d JE |
1266 | return; |
1267 | } | |
1268 | if (fcf->pri < best->pri) | |
1269 | best = fcf; | |
1270 | } | |
1271 | fip->sel_fcf = best; | |
1272 | } | |
1273 | ||
1274 | /** | |
70b51aab RL |
1275 | * fcoe_ctlr_timeout() - FIP timeout handler |
1276 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1277 | */ |
1278 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1279 | { | |
1280 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1281 | |
1282 | schedule_work(&fip->timer_work); | |
1283 | } | |
1284 | ||
1285 | /** | |
1286 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1287 | * @work: Handle to a FCoE controller | |
1288 | * | |
1289 | * Ages FCFs. Triggers FCF selection if possible. | |
1290 | * Sends keep-alives and resets. | |
1291 | */ | |
1292 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1293 | { | |
1294 | struct fcoe_ctlr *fip; | |
1295 | struct fc_lport *vport; | |
1296 | u8 *mac; | |
1297 | u8 reset = 0; | |
1298 | u8 send_ctlr_ka = 0; | |
1299 | u8 send_port_ka = 0; | |
97c8389d JE |
1300 | struct fcoe_fcf *sel; |
1301 | struct fcoe_fcf *fcf; | |
8690cb83 | 1302 | unsigned long next_timer; |
97c8389d | 1303 | |
fdb068c6 JE |
1304 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
1305 | ||
1306 | mutex_lock(&fip->ctlr_mutex); | |
97c8389d | 1307 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1308 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1309 | return; |
1310 | } | |
1311 | ||
1312 | fcf = fip->sel_fcf; | |
8690cb83 | 1313 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1314 | |
1315 | sel = fip->sel_fcf; | |
8690cb83 JE |
1316 | if (!sel && fip->sel_time) { |
1317 | if (time_after_eq(jiffies, fip->sel_time)) { | |
1318 | fcoe_ctlr_select(fip); | |
1319 | sel = fip->sel_fcf; | |
1320 | fip->sel_time = 0; | |
1321 | } else if (time_after(next_timer, fip->sel_time)) | |
1322 | next_timer = fip->sel_time; | |
97c8389d JE |
1323 | } |
1324 | ||
1325 | if (sel != fcf) { | |
1326 | fcf = sel; /* the old FCF may have been freed */ | |
1327 | if (sel) { | |
650bd12b | 1328 | printk(KERN_INFO "libfcoe: host%d: FIP selected " |
66d6faec JB |
1329 | "Fibre-Channel Forwarder MAC %pM\n", |
1330 | fip->lp->host->host_no, sel->fcf_mac); | |
97c8389d JE |
1331 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); |
1332 | fip->port_ka_time = jiffies + | |
70b51aab | 1333 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
97c8389d | 1334 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
d99ee45b JE |
1335 | if (time_after(next_timer, fip->ctlr_ka_time)) |
1336 | next_timer = fip->ctlr_ka_time; | |
97c8389d | 1337 | } else { |
650bd12b | 1338 | printk(KERN_NOTICE "libfcoe: host%d: " |
70b51aab | 1339 | "FIP Fibre-Channel Forwarder timed out. " |
97c8389d JE |
1340 | "Starting FCF discovery.\n", |
1341 | fip->lp->host->host_no); | |
fdb068c6 | 1342 | reset = 1; |
42913657 | 1343 | schedule_work(&fip->timer_work); |
97c8389d | 1344 | } |
97c8389d JE |
1345 | } |
1346 | ||
8cdffdcc | 1347 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1348 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1349 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1350 | send_ctlr_ka = 1; |
97c8389d JE |
1351 | } |
1352 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1353 | next_timer = fip->ctlr_ka_time; | |
1354 | ||
1355 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1356 | fip->port_ka_time = jiffies + |
70b51aab | 1357 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1358 | send_port_ka = 1; |
97c8389d JE |
1359 | } |
1360 | if (time_after(next_timer, fip->port_ka_time)) | |
1361 | next_timer = fip->port_ka_time; | |
97c8389d | 1362 | } |
8690cb83 JE |
1363 | if (!list_empty(&fip->fcfs)) |
1364 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1365 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1366 | |
516a6486 | 1367 | if (reset) { |
dd42dac4 | 1368 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1369 | /* restart things with a solicitation */ |
1370 | fcoe_ctlr_solicit(fip, NULL); | |
1371 | } | |
11b56188 | 1372 | |
fdb068c6 | 1373 | if (send_ctlr_ka) |
11b56188 | 1374 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1375 | |
1376 | if (send_port_ka) { | |
11b56188 CL |
1377 | mutex_lock(&fip->lp->lp_mutex); |
1378 | mac = fip->get_src_addr(fip->lp); | |
1379 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1380 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1381 | mac = fip->get_src_addr(vport); | |
1382 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1383 | } | |
1384 | mutex_unlock(&fip->lp->lp_mutex); | |
1385 | } | |
97c8389d JE |
1386 | } |
1387 | ||
1388 | /** | |
70b51aab RL |
1389 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1390 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1391 | */ |
1392 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1393 | { | |
1394 | struct fcoe_ctlr *fip; | |
1395 | struct sk_buff *skb; | |
1396 | ||
1397 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1398 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1399 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1400 | } |
1401 | ||
1402 | /** | |
386309ce | 1403 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1404 | * @fip: The FCoE controller |
1405 | * @fp: The FC frame to snoop | |
97c8389d JE |
1406 | * |
1407 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1408 | * | |
1409 | * The caller has checked that we are waiting for login as indicated | |
1410 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1411 | * | |
1412 | * The caller is responsible for freeing the frame. | |
386309ce | 1413 | * Fill in the granted_mac address. |
97c8389d JE |
1414 | * |
1415 | * Return non-zero if the frame should not be delivered to libfc. | |
1416 | */ | |
11b56188 | 1417 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1418 | struct fc_frame *fp) |
97c8389d JE |
1419 | { |
1420 | struct fc_frame_header *fh; | |
1421 | u8 op; | |
386309ce | 1422 | u8 *sa; |
97c8389d | 1423 | |
386309ce | 1424 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1425 | fh = fc_frame_header_get(fp); |
1426 | if (fh->fh_type != FC_TYPE_ELS) | |
1427 | return 0; | |
1428 | ||
1429 | op = fc_frame_payload_op(fp); | |
1430 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1431 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1432 | ||
fdb068c6 | 1433 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1434 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1435 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1436 | return -EINVAL; |
1437 | } | |
9b651da9 | 1438 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1439 | LIBFCOE_FIP_DBG(fip, |
1440 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1441 | |
1442 | /* | |
1443 | * FLOGI accepted. | |
1444 | * If the src mac addr is FC_OUI-based, then we mark the | |
1445 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1446 | * Otherwise we use the FCoE gateway addr | |
1447 | */ | |
1448 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
1449 | fip->map_dest = 1; | |
1450 | } else { | |
1451 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1452 | fip->map_dest = 0; | |
1453 | } | |
1454 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1455 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1456 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1457 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1458 | /* | |
1459 | * Save source MAC for point-to-point responses. | |
1460 | */ | |
fdb068c6 | 1461 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1462 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1463 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1464 | fip->map_dest = 0; | |
e49bf614 JE |
1465 | if (fip->state == FIP_ST_AUTO) |
1466 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1467 | "Setting non-FIP mode\n"); | |
9b651da9 | 1468 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1469 | } |
fdb068c6 | 1470 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1471 | } |
1472 | return 0; | |
1473 | } | |
1474 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1475 | ||
5e80f7f7 | 1476 | /** |
70b51aab RL |
1477 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1478 | * @mac: The MAC address to convert | |
1479 | * @scheme: The scheme to use when converting | |
1480 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1481 | * |
1482 | * Returns: u64 fc world wide name | |
1483 | */ | |
1484 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1485 | unsigned int scheme, unsigned int port) | |
1486 | { | |
1487 | u64 wwn; | |
1488 | u64 host_mac; | |
1489 | ||
1490 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1491 | host_mac = ((u64) mac[0] << 40) | | |
1492 | ((u64) mac[1] << 32) | | |
1493 | ((u64) mac[2] << 24) | | |
1494 | ((u64) mac[3] << 16) | | |
1495 | ((u64) mac[4] << 8) | | |
1496 | (u64) mac[5]; | |
1497 | ||
1498 | WARN_ON(host_mac >= (1ULL << 48)); | |
1499 | wwn = host_mac | ((u64) scheme << 60); | |
1500 | switch (scheme) { | |
1501 | case 1: | |
1502 | WARN_ON(port != 0); | |
1503 | break; | |
1504 | case 2: | |
1505 | WARN_ON(port >= 0xfff); | |
1506 | wwn |= (u64) port << 48; | |
1507 | break; | |
1508 | default: | |
1509 | WARN_ON(1); | |
1510 | break; | |
1511 | } | |
1512 | ||
1513 | return wwn; | |
1514 | } | |
1515 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1516 | ||
1517 | /** | |
70b51aab RL |
1518 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
1519 | * @lp: The local port to configure libfc for | |
1520 | * @tt: The libfc function template | |
5e80f7f7 VD |
1521 | * |
1522 | * Returns : 0 for success | |
1523 | */ | |
70b51aab RL |
1524 | int fcoe_libfc_config(struct fc_lport *lport, |
1525 | struct libfc_function_template *tt) | |
5e80f7f7 VD |
1526 | { |
1527 | /* Set the function pointers set by the LLDD */ | |
70b51aab RL |
1528 | memcpy(&lport->tt, tt, sizeof(*tt)); |
1529 | if (fc_fcp_init(lport)) | |
5e80f7f7 | 1530 | return -ENOMEM; |
70b51aab RL |
1531 | fc_exch_init(lport); |
1532 | fc_elsct_init(lport); | |
1533 | fc_lport_init(lport); | |
1534 | fc_rport_init(lport); | |
1535 | fc_disc_init(lport); | |
5e80f7f7 VD |
1536 | |
1537 | return 0; | |
1538 | } | |
1539 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); | |
11b56188 | 1540 |