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