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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> | |
34 | #include <net/rtnetlink.h> | |
35 | ||
36 | #include <scsi/fc/fc_els.h> | |
37 | #include <scsi/fc/fc_fs.h> | |
38 | #include <scsi/fc/fc_fip.h> | |
39 | #include <scsi/fc/fc_encaps.h> | |
40 | #include <scsi/fc/fc_fcoe.h> | |
5e80f7f7 VD |
41 | |
42 | #include <scsi/libfc.h> | |
97c8389d | 43 | #include <scsi/libfcoe.h> |
9b34ecff VD |
44 | |
45 | MODULE_AUTHOR("Open-FCoE.org"); | |
97c8389d | 46 | MODULE_DESCRIPTION("FIP discovery protocol support for FCoE HBAs"); |
9b34ecff | 47 | MODULE_LICENSE("GPL v2"); |
5e80f7f7 | 48 | |
97c8389d JE |
49 | #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */ |
50 | #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */ | |
51 | ||
52 | static void fcoe_ctlr_timeout(unsigned long); | |
53 | static void fcoe_ctlr_link_work(struct work_struct *); | |
54 | static void fcoe_ctlr_recv_work(struct work_struct *); | |
55 | ||
56 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; | |
57 | ||
650bd12b RL |
58 | unsigned int libfcoe_debug_logging; |
59 | module_param_named(debug_logging, libfcoe_debug_logging, int, S_IRUGO|S_IWUSR); | |
60 | MODULE_PARM_DESC(debug_logging, "a bit mask of logging levels"); | |
97c8389d | 61 | |
70b51aab | 62 | #define LIBFCOE_LOGGING 0x01 /* General logging, not categorized */ |
650bd12b RL |
63 | #define LIBFCOE_FIP_LOGGING 0x02 /* FIP logging */ |
64 | ||
70b51aab RL |
65 | #define LIBFCOE_CHECK_LOGGING(LEVEL, CMD) \ |
66 | do { \ | |
67 | if (unlikely(libfcoe_debug_logging & LEVEL)) \ | |
68 | do { \ | |
69 | CMD; \ | |
70 | } while (0); \ | |
a69b06bc | 71 | } while (0) |
650bd12b RL |
72 | |
73 | #define LIBFCOE_DBG(fmt, args...) \ | |
74 | LIBFCOE_CHECK_LOGGING(LIBFCOE_LOGGING, \ | |
75 | printk(KERN_INFO "libfcoe: " fmt, ##args);) | |
97c8389d | 76 | |
650bd12b RL |
77 | #define LIBFCOE_FIP_DBG(fmt, args...) \ |
78 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ | |
79 | printk(KERN_INFO "fip: " fmt, ##args);) | |
97c8389d | 80 | |
70b51aab RL |
81 | /** |
82 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
83 | * @fcf: The FCF to check | |
84 | * | |
97c8389d JE |
85 | * Return non-zero if FCF fcoe_size has been validated. |
86 | */ | |
87 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
88 | { | |
89 | return (fcf->flags & FIP_FL_SOL) != 0; | |
90 | } | |
91 | ||
70b51aab RL |
92 | /** |
93 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
94 | * @fcf: The FCF to check | |
95 | * | |
97c8389d JE |
96 | * Return non-zero if the FCF is usable. |
97 | */ | |
98 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
99 | { | |
100 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
101 | ||
102 | return (fcf->flags & flags) == flags; | |
103 | } | |
104 | ||
105 | /** | |
70b51aab RL |
106 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
107 | * @fip: The FCoE controller to initialize | |
97c8389d JE |
108 | */ |
109 | void fcoe_ctlr_init(struct fcoe_ctlr *fip) | |
110 | { | |
111 | fip->state = FIP_ST_LINK_WAIT; | |
22bcd225 | 112 | fip->mode = FIP_ST_AUTO; |
97c8389d JE |
113 | INIT_LIST_HEAD(&fip->fcfs); |
114 | spin_lock_init(&fip->lock); | |
115 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
116 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
117 | INIT_WORK(&fip->link_work, fcoe_ctlr_link_work); | |
118 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); | |
119 | skb_queue_head_init(&fip->fip_recv_list); | |
120 | } | |
121 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
122 | ||
123 | /** | |
70b51aab RL |
124 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
125 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
126 | * |
127 | * Called with &fcoe_ctlr lock held. | |
128 | */ | |
129 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
130 | { | |
131 | struct fcoe_fcf *fcf; | |
132 | struct fcoe_fcf *next; | |
133 | ||
134 | fip->sel_fcf = NULL; | |
135 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
136 | list_del(&fcf->list); | |
137 | kfree(fcf); | |
138 | } | |
139 | fip->fcf_count = 0; | |
140 | fip->sel_time = 0; | |
141 | } | |
142 | ||
143 | /** | |
70b51aab RL |
144 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
145 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
146 | * |
147 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
148 | * | |
149 | * The receive handler will have been deleted before this to guarantee | |
150 | * that no more recv_work will be scheduled. | |
151 | * | |
152 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
153 | * This guarantees that no further timeouts or work will be scheduled. | |
154 | */ | |
155 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
156 | { | |
a4b7cfae CL |
157 | cancel_work_sync(&fip->recv_work); |
158 | spin_lock_bh(&fip->fip_recv_list.lock); | |
159 | __skb_queue_purge(&fip->fip_recv_list); | |
160 | spin_unlock_bh(&fip->fip_recv_list.lock); | |
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); | |
a4b7cfae | 167 | cancel_work_sync(&fip->link_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) { | |
260 | fip->last_link = 1; | |
261 | fip->link = 1; | |
262 | spin_unlock_bh(&fip->lock); | |
263 | fc_linkup(fip->lp); | |
264 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
22bcd225 | 265 | fip->state = fip->mode; |
97c8389d JE |
266 | fip->last_link = 1; |
267 | fip->link = 1; | |
268 | spin_unlock_bh(&fip->lock); | |
22bcd225 JE |
269 | if (fip->state == FIP_ST_AUTO) |
270 | LIBFCOE_FIP_DBG("%s", "setting AUTO mode.\n"); | |
97c8389d JE |
271 | fc_linkup(fip->lp); |
272 | fcoe_ctlr_solicit(fip, NULL); | |
273 | } else | |
274 | spin_unlock_bh(&fip->lock); | |
275 | } | |
276 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
277 | ||
278 | /** | |
70b51aab RL |
279 | * fcoe_ctlr_reset() - Reset a FCoE controller |
280 | * @fip: The FCoE controller to reset | |
281 | * @new_state: The FIP state to be entered | |
97c8389d JE |
282 | * |
283 | * Returns non-zero if the link was up and now isn't. | |
284 | */ | |
285 | static int fcoe_ctlr_reset(struct fcoe_ctlr *fip, enum fip_state new_state) | |
286 | { | |
70b51aab | 287 | struct fc_lport *lport = fip->lp; |
97c8389d JE |
288 | int link_dropped; |
289 | ||
290 | spin_lock_bh(&fip->lock); | |
291 | fcoe_ctlr_reset_fcfs(fip); | |
292 | del_timer(&fip->timer); | |
293 | fip->state = new_state; | |
294 | fip->ctlr_ka_time = 0; | |
295 | fip->port_ka_time = 0; | |
296 | fip->sol_time = 0; | |
297 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
298 | fip->map_dest = 0; | |
299 | fip->last_link = 0; | |
300 | link_dropped = fip->link; | |
301 | fip->link = 0; | |
302 | spin_unlock_bh(&fip->lock); | |
303 | ||
304 | if (link_dropped) | |
70b51aab | 305 | fc_linkdown(lport); |
97c8389d JE |
306 | |
307 | if (new_state == FIP_ST_ENABLED) { | |
308 | fcoe_ctlr_solicit(fip, NULL); | |
70b51aab | 309 | fc_linkup(lport); |
97c8389d JE |
310 | link_dropped = 0; |
311 | } | |
312 | return link_dropped; | |
313 | } | |
314 | ||
315 | /** | |
70b51aab RL |
316 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
317 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
318 | * |
319 | * Returns non-zero if the link was up and now isn't. | |
320 | * | |
321 | * Called from the LLD when the network link is not ready. | |
322 | * There may be multiple calls while the link is down. | |
323 | */ | |
324 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
325 | { | |
326 | return fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); | |
327 | } | |
328 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
329 | ||
330 | /** | |
70b51aab RL |
331 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
332 | * @fip: The FCoE controller to send the FKA on | |
333 | * @lport: libfc fc_lport to send from | |
334 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
335 | * @sa: The source MAC address | |
97c8389d JE |
336 | * |
337 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
338 | * The source MAC is the native MAC address. | |
339 | * | |
340 | * A port keep-alive is sent every 90 seconds while logged in. | |
341 | * The source MAC is the assigned mapped source address. | |
342 | * The destination is the FCF's F-port. | |
343 | */ | |
11b56188 CL |
344 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
345 | struct fc_lport *lport, | |
346 | int ports, u8 *sa) | |
97c8389d JE |
347 | { |
348 | struct sk_buff *skb; | |
349 | struct fip_kal { | |
350 | struct ethhdr eth; | |
351 | struct fip_header fip; | |
352 | struct fip_mac_desc mac; | |
353 | } __attribute__((packed)) *kal; | |
354 | struct fip_vn_desc *vn; | |
355 | u32 len; | |
356 | struct fc_lport *lp; | |
357 | struct fcoe_fcf *fcf; | |
358 | ||
359 | fcf = fip->sel_fcf; | |
360 | lp = fip->lp; | |
361 | if (!fcf || !fc_host_port_id(lp->host)) | |
362 | return; | |
363 | ||
364 | len = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr); | |
365 | BUG_ON(len < sizeof(*kal) + sizeof(*vn)); | |
366 | skb = dev_alloc_skb(len); | |
367 | if (!skb) | |
368 | return; | |
369 | ||
370 | kal = (struct fip_kal *)skb->data; | |
371 | memset(kal, 0, len); | |
372 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
373 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
374 | kal->eth.h_proto = htons(ETH_P_FIP); | |
375 | ||
376 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
377 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
378 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
379 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 380 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 381 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
382 | if (fip->spma) |
383 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
384 | |
385 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
386 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
387 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
388 | if (ports) { |
389 | vn = (struct fip_vn_desc *)(kal + 1); | |
390 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
391 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 392 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
97c8389d JE |
393 | hton24(vn->fd_fc_id, fc_host_port_id(lp->host)); |
394 | put_unaligned_be64(lp->wwpn, &vn->fd_wwpn); | |
395 | } | |
97c8389d | 396 | skb_put(skb, len); |
0f491539 | 397 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
398 | skb_reset_mac_header(skb); |
399 | skb_reset_network_header(skb); | |
400 | fip->send(fip, skb); | |
401 | } | |
402 | ||
403 | /** | |
70b51aab RL |
404 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
405 | * @fip: The FCoE controller for the ELS frame | |
406 | * @dtype: The FIP descriptor type for the frame | |
407 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
97c8389d JE |
408 | * |
409 | * Returns non-zero error code on failure. | |
410 | * | |
411 | * The caller must check that the length is a multiple of 4. | |
412 | * | |
413 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
414 | * Headroom includes the FIP encapsulation description, FIP header, and | |
415 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
416 | */ | |
11b56188 | 417 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
97c8389d JE |
418 | u8 dtype, struct sk_buff *skb) |
419 | { | |
420 | struct fip_encaps_head { | |
421 | struct ethhdr eth; | |
422 | struct fip_header fip; | |
423 | struct fip_encaps encaps; | |
424 | } __attribute__((packed)) *cap; | |
425 | struct fip_mac_desc *mac; | |
426 | struct fcoe_fcf *fcf; | |
427 | size_t dlen; | |
5a84baea | 428 | u16 fip_flags; |
97c8389d JE |
429 | |
430 | fcf = fip->sel_fcf; | |
431 | if (!fcf) | |
432 | return -ENODEV; | |
5a84baea YZ |
433 | |
434 | /* set flags according to both FCF and lport's capability on SPMA */ | |
435 | fip_flags = fcf->flags; | |
436 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; | |
437 | if (!fip_flags) | |
438 | return -ENODEV; | |
439 | ||
97c8389d JE |
440 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
441 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
442 | ||
443 | memset(cap, 0, sizeof(*cap)); | |
444 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
445 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
446 | cap->eth.h_proto = htons(ETH_P_FIP); | |
447 | ||
448 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
449 | cap->fip.fip_op = htons(FIP_OP_LS); | |
450 | cap->fip.fip_subcode = FIP_SC_REQ; | |
451 | cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); | |
5a84baea | 452 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
453 | |
454 | cap->encaps.fd_desc.fip_dtype = dtype; | |
455 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
456 | ||
457 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
458 | memset(mac, 0, sizeof(mac)); | |
459 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
460 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
db36c06c | 461 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) |
11b56188 | 462 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
184dd345 VD |
463 | else if (fip->spma) |
464 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d | 465 | |
0f491539 | 466 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
467 | skb_reset_mac_header(skb); |
468 | skb_reset_network_header(skb); | |
469 | return 0; | |
470 | } | |
471 | ||
472 | /** | |
473 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
474 | * @fip: FCoE controller. | |
11b56188 | 475 | * @lport: libfc fc_lport to send from |
97c8389d JE |
476 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
477 | * | |
478 | * Returns a non-zero error code if the frame should not be sent. | |
479 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
480 | * | |
481 | * The caller must check that the length is a multiple of 4. | |
482 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
483 | */ | |
11b56188 CL |
484 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
485 | struct sk_buff *skb) | |
97c8389d JE |
486 | { |
487 | struct fc_frame_header *fh; | |
488 | u16 old_xid; | |
489 | u8 op; | |
11b56188 | 490 | u8 mac[ETH_ALEN]; |
97c8389d | 491 | |
97c8389d JE |
492 | fh = (struct fc_frame_header *)skb->data; |
493 | op = *(u8 *)(fh + 1); | |
494 | ||
5f48f70e | 495 | if (op == ELS_FLOGI) { |
97c8389d JE |
496 | old_xid = fip->flogi_oxid; |
497 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
498 | if (fip->state == FIP_ST_AUTO) { | |
499 | if (old_xid == FC_XID_UNKNOWN) | |
500 | fip->flogi_count = 0; | |
501 | fip->flogi_count++; | |
502 | if (fip->flogi_count < 3) | |
503 | goto drop; | |
504 | fip->map_dest = 1; | |
505 | return 0; | |
506 | } | |
5f48f70e JE |
507 | if (fip->state == FIP_ST_NON_FIP) |
508 | fip->map_dest = 1; | |
509 | } | |
510 | ||
511 | if (fip->state == FIP_ST_NON_FIP) | |
512 | return 0; | |
513 | ||
514 | switch (op) { | |
515 | case ELS_FLOGI: | |
97c8389d JE |
516 | op = FIP_DT_FLOGI; |
517 | break; | |
518 | case ELS_FDISC: | |
519 | if (ntoh24(fh->fh_s_id)) | |
520 | return 0; | |
521 | op = FIP_DT_FDISC; | |
522 | break; | |
523 | case ELS_LOGO: | |
524 | if (fip->state != FIP_ST_ENABLED) | |
525 | return 0; | |
526 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
527 | return 0; | |
528 | op = FIP_DT_LOGO; | |
529 | break; | |
530 | case ELS_LS_ACC: | |
531 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
532 | return 0; | |
533 | if (!ntoh24(fh->fh_s_id)) | |
534 | return 0; | |
535 | if (fip->state == FIP_ST_AUTO) | |
536 | return 0; | |
537 | /* | |
538 | * Here we must've gotten an SID by accepting an FLOGI | |
539 | * from a point-to-point connection. Switch to using | |
540 | * the source mac based on the SID. The destination | |
541 | * MAC in this case would have been set by receving the | |
542 | * FLOGI. | |
543 | */ | |
544 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
11b56188 CL |
545 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
546 | fip->update_mac(lport, mac); | |
97c8389d JE |
547 | return 0; |
548 | default: | |
549 | if (fip->state != FIP_ST_ENABLED) | |
550 | goto drop; | |
551 | return 0; | |
552 | } | |
11b56188 | 553 | if (fcoe_ctlr_encaps(fip, lport, op, skb)) |
97c8389d JE |
554 | goto drop; |
555 | fip->send(fip, skb); | |
556 | return -EINPROGRESS; | |
557 | drop: | |
558 | kfree_skb(skb); | |
559 | return -EINVAL; | |
560 | } | |
561 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
562 | ||
70b51aab RL |
563 | /** |
564 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
565 | * @fip: The FCoE controller to free FCFs on | |
97c8389d JE |
566 | * |
567 | * Called with lock held. | |
568 | * | |
569 | * An FCF is considered old if we have missed three advertisements. | |
570 | * That is, there have been no valid advertisement from it for three | |
571 | * times its keep-alive period including fuzz. | |
572 | * | |
573 | * In addition, determine the time when an FCF selection can occur. | |
574 | */ | |
575 | static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) | |
576 | { | |
577 | struct fcoe_fcf *fcf; | |
578 | struct fcoe_fcf *next; | |
579 | unsigned long sel_time = 0; | |
580 | ||
581 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
582 | if (time_after(jiffies, fcf->time + fcf->fka_period * 3 + | |
583 | msecs_to_jiffies(FIP_FCF_FUZZ * 3))) { | |
584 | if (fip->sel_fcf == fcf) | |
585 | fip->sel_fcf = NULL; | |
586 | list_del(&fcf->list); | |
587 | WARN_ON(!fip->fcf_count); | |
588 | fip->fcf_count--; | |
589 | kfree(fcf); | |
590 | } else if (fcoe_ctlr_mtu_valid(fcf) && | |
591 | (!sel_time || time_before(sel_time, fcf->time))) { | |
592 | sel_time = fcf->time; | |
593 | } | |
594 | } | |
595 | if (sel_time) { | |
596 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
597 | fip->sel_time = sel_time; | |
598 | if (time_before(sel_time, fip->timer.expires)) | |
599 | mod_timer(&fip->timer, sel_time); | |
600 | } else { | |
601 | fip->sel_time = 0; | |
602 | } | |
603 | } | |
604 | ||
605 | /** | |
70b51aab RL |
606 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
607 | * @skb: The received FIP advertisement frame | |
608 | * @fcf: The resulting FCF entry | |
97c8389d JE |
609 | * |
610 | * Returns zero on a valid parsed advertisement, | |
611 | * otherwise returns non zero value. | |
612 | */ | |
613 | static int fcoe_ctlr_parse_adv(struct sk_buff *skb, struct fcoe_fcf *fcf) | |
614 | { | |
615 | struct fip_header *fiph; | |
616 | struct fip_desc *desc = NULL; | |
617 | struct fip_wwn_desc *wwn; | |
618 | struct fip_fab_desc *fab; | |
619 | struct fip_fka_desc *fka; | |
620 | unsigned long t; | |
621 | size_t rlen; | |
622 | size_t dlen; | |
623 | ||
624 | memset(fcf, 0, sizeof(*fcf)); | |
625 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
626 | ||
627 | fiph = (struct fip_header *)skb->data; | |
628 | fcf->flags = ntohs(fiph->fip_flags); | |
629 | ||
630 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
631 | if (rlen + sizeof(*fiph) > skb->len) | |
632 | return -EINVAL; | |
633 | ||
634 | desc = (struct fip_desc *)(fiph + 1); | |
635 | while (rlen > 0) { | |
636 | dlen = desc->fip_dlen * FIP_BPW; | |
637 | if (dlen < sizeof(*desc) || dlen > rlen) | |
638 | return -EINVAL; | |
639 | switch (desc->fip_dtype) { | |
640 | case FIP_DT_PRI: | |
641 | if (dlen != sizeof(struct fip_pri_desc)) | |
642 | goto len_err; | |
643 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
644 | break; | |
645 | case FIP_DT_MAC: | |
646 | if (dlen != sizeof(struct fip_mac_desc)) | |
647 | goto len_err; | |
648 | memcpy(fcf->fcf_mac, | |
649 | ((struct fip_mac_desc *)desc)->fd_mac, | |
650 | ETH_ALEN); | |
651 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
650bd12b RL |
652 | LIBFCOE_FIP_DBG("Invalid MAC address " |
653 | "in FIP adv\n"); | |
97c8389d JE |
654 | return -EINVAL; |
655 | } | |
656 | break; | |
657 | case FIP_DT_NAME: | |
658 | if (dlen != sizeof(struct fip_wwn_desc)) | |
659 | goto len_err; | |
660 | wwn = (struct fip_wwn_desc *)desc; | |
661 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
662 | break; | |
663 | case FIP_DT_FAB: | |
664 | if (dlen != sizeof(struct fip_fab_desc)) | |
665 | goto len_err; | |
666 | fab = (struct fip_fab_desc *)desc; | |
667 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
668 | fcf->vfid = ntohs(fab->fd_vfid); | |
669 | fcf->fc_map = ntoh24(fab->fd_map); | |
670 | break; | |
671 | case FIP_DT_FKA: | |
672 | if (dlen != sizeof(struct fip_fka_desc)) | |
673 | goto len_err; | |
674 | fka = (struct fip_fka_desc *)desc; | |
675 | t = ntohl(fka->fd_fka_period); | |
676 | if (t >= FCOE_CTLR_MIN_FKA) | |
677 | fcf->fka_period = msecs_to_jiffies(t); | |
678 | break; | |
679 | case FIP_DT_MAP_OUI: | |
680 | case FIP_DT_FCOE_SIZE: | |
681 | case FIP_DT_FLOGI: | |
682 | case FIP_DT_FDISC: | |
683 | case FIP_DT_LOGO: | |
684 | case FIP_DT_ELP: | |
685 | default: | |
650bd12b RL |
686 | LIBFCOE_FIP_DBG("unexpected descriptor type %x " |
687 | "in FIP adv\n", desc->fip_dtype); | |
97c8389d JE |
688 | /* standard says ignore unknown descriptors >= 128 */ |
689 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
690 | return -EINVAL; | |
691 | continue; | |
692 | } | |
693 | desc = (struct fip_desc *)((char *)desc + dlen); | |
694 | rlen -= dlen; | |
695 | } | |
696 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
697 | return -EINVAL; | |
698 | if (!fcf->switch_name || !fcf->fabric_name) | |
699 | return -EINVAL; | |
700 | return 0; | |
701 | ||
702 | len_err: | |
650bd12b RL |
703 | LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n", |
704 | desc->fip_dtype, dlen); | |
97c8389d JE |
705 | return -EINVAL; |
706 | } | |
707 | ||
708 | /** | |
70b51aab RL |
709 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
710 | * @fip: The FCoE controller receiving the advertisement | |
711 | * @skb: The received FIP packet | |
97c8389d JE |
712 | */ |
713 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
714 | { | |
715 | struct fcoe_fcf *fcf; | |
716 | struct fcoe_fcf new; | |
717 | struct fcoe_fcf *found; | |
718 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
719 | int first = 0; | |
720 | int mtu_valid; | |
721 | ||
722 | if (fcoe_ctlr_parse_adv(skb, &new)) | |
723 | return; | |
724 | ||
725 | spin_lock_bh(&fip->lock); | |
726 | first = list_empty(&fip->fcfs); | |
727 | found = NULL; | |
728 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
729 | if (fcf->switch_name == new.switch_name && | |
730 | fcf->fabric_name == new.fabric_name && | |
731 | fcf->fc_map == new.fc_map && | |
732 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
733 | found = fcf; | |
734 | break; | |
735 | } | |
736 | } | |
737 | if (!found) { | |
738 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
739 | goto out; | |
740 | ||
741 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
742 | if (!fcf) | |
743 | goto out; | |
744 | ||
745 | fip->fcf_count++; | |
746 | memcpy(fcf, &new, sizeof(new)); | |
747 | list_add(&fcf->list, &fip->fcfs); | |
748 | } else { | |
749 | /* | |
750 | * Flags in advertisements are ignored once the FCF is | |
751 | * selected. Flags in unsolicited advertisements are | |
752 | * ignored after a usable solicited advertisement | |
753 | * has been received. | |
754 | */ | |
755 | if (fcf == fip->sel_fcf) { | |
756 | fip->ctlr_ka_time -= fcf->fka_period; | |
757 | fip->ctlr_ka_time += new.fka_period; | |
758 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
759 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
760 | } else if (!fcoe_ctlr_fcf_usable(fcf)) | |
761 | fcf->flags = new.flags; | |
762 | fcf->fka_period = new.fka_period; | |
763 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
764 | } | |
765 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
766 | fcf->time = jiffies; | |
650bd12b RL |
767 | if (!found) { |
768 | LIBFCOE_FIP_DBG("New FCF for fab %llx map %x val %d\n", | |
769 | fcf->fabric_name, fcf->fc_map, mtu_valid); | |
770 | } | |
97c8389d JE |
771 | |
772 | /* | |
773 | * If this advertisement is not solicited and our max receive size | |
774 | * hasn't been verified, send a solicited advertisement. | |
775 | */ | |
776 | if (!mtu_valid) | |
777 | fcoe_ctlr_solicit(fip, fcf); | |
778 | ||
779 | /* | |
780 | * If its been a while since we did a solicit, and this is | |
781 | * the first advertisement we've received, do a multicast | |
782 | * solicitation to gather as many advertisements as we can | |
783 | * before selection occurs. | |
784 | */ | |
785 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
786 | fcoe_ctlr_solicit(fip, NULL); | |
787 | ||
788 | /* | |
789 | * If this is the first validated FCF, note the time and | |
790 | * set a timer to trigger selection. | |
791 | */ | |
792 | if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) { | |
793 | fip->sel_time = jiffies + | |
70b51aab | 794 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
795 | if (!timer_pending(&fip->timer) || |
796 | time_before(fip->sel_time, fip->timer.expires)) | |
797 | mod_timer(&fip->timer, fip->sel_time); | |
798 | } | |
799 | out: | |
800 | spin_unlock_bh(&fip->lock); | |
801 | } | |
802 | ||
803 | /** | |
70b51aab RL |
804 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
805 | * @fip: The FCoE controller which received the packet | |
806 | * @skb: The received FIP packet | |
97c8389d JE |
807 | */ |
808 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
809 | { | |
70b51aab | 810 | struct fc_lport *lport = fip->lp; |
97c8389d | 811 | struct fip_header *fiph; |
11b56188 | 812 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
813 | struct fc_frame_header *fh = NULL; |
814 | struct fip_desc *desc; | |
815 | struct fip_encaps *els; | |
816 | struct fcoe_dev_stats *stats; | |
817 | enum fip_desc_type els_dtype = 0; | |
818 | u8 els_op; | |
819 | u8 sub; | |
820 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
821 | size_t els_len = 0; | |
822 | size_t rlen; | |
823 | size_t dlen; | |
824 | ||
825 | fiph = (struct fip_header *)skb->data; | |
826 | sub = fiph->fip_subcode; | |
827 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
828 | goto drop; | |
829 | ||
830 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
831 | if (rlen + sizeof(*fiph) > skb->len) | |
832 | goto drop; | |
833 | ||
834 | desc = (struct fip_desc *)(fiph + 1); | |
835 | while (rlen > 0) { | |
836 | dlen = desc->fip_dlen * FIP_BPW; | |
837 | if (dlen < sizeof(*desc) || dlen > rlen) | |
838 | goto drop; | |
839 | switch (desc->fip_dtype) { | |
840 | case FIP_DT_MAC: | |
841 | if (dlen != sizeof(struct fip_mac_desc)) | |
842 | goto len_err; | |
843 | memcpy(granted_mac, | |
844 | ((struct fip_mac_desc *)desc)->fd_mac, | |
845 | ETH_ALEN); | |
846 | if (!is_valid_ether_addr(granted_mac)) { | |
650bd12b RL |
847 | LIBFCOE_FIP_DBG("Invalid MAC address " |
848 | "in FIP ELS\n"); | |
97c8389d JE |
849 | goto drop; |
850 | } | |
11b56188 | 851 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); |
97c8389d JE |
852 | break; |
853 | case FIP_DT_FLOGI: | |
854 | case FIP_DT_FDISC: | |
855 | case FIP_DT_LOGO: | |
856 | case FIP_DT_ELP: | |
857 | if (fh) | |
858 | goto drop; | |
859 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
860 | goto len_err; | |
861 | els_len = dlen - sizeof(*els); | |
862 | els = (struct fip_encaps *)desc; | |
863 | fh = (struct fc_frame_header *)(els + 1); | |
864 | els_dtype = desc->fip_dtype; | |
865 | break; | |
866 | default: | |
650bd12b RL |
867 | LIBFCOE_FIP_DBG("unexpected descriptor type %x " |
868 | "in FIP adv\n", desc->fip_dtype); | |
97c8389d JE |
869 | /* standard says ignore unknown descriptors >= 128 */ |
870 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
871 | goto drop; | |
872 | continue; | |
873 | } | |
874 | desc = (struct fip_desc *)((char *)desc + dlen); | |
875 | rlen -= dlen; | |
876 | } | |
877 | ||
878 | if (!fh) | |
879 | goto drop; | |
880 | els_op = *(u8 *)(fh + 1); | |
881 | ||
11b56188 CL |
882 | if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && |
883 | fip->flogi_oxid == ntohs(fh->fh_ox_id) && | |
884 | els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) | |
97c8389d | 885 | fip->flogi_oxid = FC_XID_UNKNOWN; |
97c8389d JE |
886 | |
887 | /* | |
888 | * Convert skb into an fc_frame containing only the ELS. | |
889 | */ | |
890 | skb_pull(skb, (u8 *)fh - skb->data); | |
891 | skb_trim(skb, els_len); | |
892 | fp = (struct fc_frame *)skb; | |
893 | fc_frame_init(fp); | |
894 | fr_sof(fp) = FC_SOF_I3; | |
895 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 896 | fr_dev(fp) = lport; |
97c8389d | 897 | |
70b51aab | 898 | stats = fc_lport_get_stats(lport); |
97c8389d JE |
899 | stats->RxFrames++; |
900 | stats->RxWords += skb->len / FIP_BPW; | |
901 | ||
70b51aab | 902 | fc_exch_recv(lport, fp); |
97c8389d JE |
903 | return; |
904 | ||
905 | len_err: | |
650bd12b RL |
906 | LIBFCOE_FIP_DBG("FIP length error in descriptor type %x len %zu\n", |
907 | desc->fip_dtype, dlen); | |
97c8389d JE |
908 | drop: |
909 | kfree_skb(skb); | |
910 | } | |
911 | ||
912 | /** | |
70b51aab RL |
913 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
914 | * @fip: The FCoE controller that received the frame | |
915 | * @fh: The received FIP header | |
97c8389d JE |
916 | * |
917 | * There may be multiple VN_Port descriptors. | |
918 | * The overall length has already been checked. | |
919 | */ | |
920 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 921 | struct fip_header *fh) |
97c8389d JE |
922 | { |
923 | struct fip_desc *desc; | |
924 | struct fip_mac_desc *mp; | |
925 | struct fip_wwn_desc *wp; | |
926 | struct fip_vn_desc *vp; | |
927 | size_t rlen; | |
928 | size_t dlen; | |
929 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 930 | struct fc_lport *lport = fip->lp; |
97c8389d JE |
931 | u32 desc_mask; |
932 | ||
650bd12b | 933 | LIBFCOE_FIP_DBG("Clear Virtual Link received\n"); |
97c8389d JE |
934 | if (!fcf) |
935 | return; | |
70b51aab | 936 | if (!fcf || !fc_host_port_id(lport->host)) |
97c8389d JE |
937 | return; |
938 | ||
939 | /* | |
940 | * mask of required descriptors. Validating each one clears its bit. | |
941 | */ | |
942 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
943 | ||
944 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
945 | desc = (struct fip_desc *)(fh + 1); | |
946 | while (rlen >= sizeof(*desc)) { | |
947 | dlen = desc->fip_dlen * FIP_BPW; | |
948 | if (dlen > rlen) | |
949 | return; | |
950 | switch (desc->fip_dtype) { | |
951 | case FIP_DT_MAC: | |
952 | mp = (struct fip_mac_desc *)desc; | |
953 | if (dlen < sizeof(*mp)) | |
954 | return; | |
955 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
956 | return; | |
957 | desc_mask &= ~BIT(FIP_DT_MAC); | |
958 | break; | |
959 | case FIP_DT_NAME: | |
960 | wp = (struct fip_wwn_desc *)desc; | |
961 | if (dlen < sizeof(*wp)) | |
962 | return; | |
963 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
964 | return; | |
965 | desc_mask &= ~BIT(FIP_DT_NAME); | |
966 | break; | |
967 | case FIP_DT_VN_ID: | |
968 | vp = (struct fip_vn_desc *)desc; | |
969 | if (dlen < sizeof(*vp)) | |
970 | return; | |
971 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
972 | fip->get_src_addr(lport)) == 0 && |
973 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
974 | ntoh24(vp->fd_fc_id) == | |
975 | fc_host_port_id(lport->host)) | |
97c8389d JE |
976 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
977 | break; | |
978 | default: | |
979 | /* standard says ignore unknown descriptors >= 128 */ | |
980 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
981 | return; | |
982 | break; | |
983 | } | |
984 | desc = (struct fip_desc *)((char *)desc + dlen); | |
985 | rlen -= dlen; | |
986 | } | |
987 | ||
988 | /* | |
989 | * reset only if all required descriptors were present and valid. | |
990 | */ | |
991 | if (desc_mask) { | |
650bd12b | 992 | LIBFCOE_FIP_DBG("missing descriptors mask %x\n", desc_mask); |
97c8389d | 993 | } else { |
650bd12b | 994 | LIBFCOE_FIP_DBG("performing Clear Virtual Link\n"); |
97c8389d JE |
995 | fcoe_ctlr_reset(fip, FIP_ST_ENABLED); |
996 | } | |
997 | } | |
998 | ||
999 | /** | |
70b51aab RL |
1000 | * fcoe_ctlr_recv() - Receive a FIP packet |
1001 | * @fip: The FCoE controller that received the packet | |
1002 | * @skb: The received FIP packet | |
97c8389d JE |
1003 | * |
1004 | * This is called from NET_RX_SOFTIRQ. | |
1005 | */ | |
1006 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1007 | { | |
1008 | spin_lock_bh(&fip->fip_recv_list.lock); | |
1009 | __skb_queue_tail(&fip->fip_recv_list, skb); | |
1010 | spin_unlock_bh(&fip->fip_recv_list.lock); | |
1011 | schedule_work(&fip->recv_work); | |
1012 | } | |
1013 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1014 | ||
1015 | /** | |
70b51aab RL |
1016 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1017 | * @fip: The FCoE controller that received the frame | |
1018 | * @skb: The received FIP frame | |
97c8389d JE |
1019 | * |
1020 | * Returns non-zero if the frame is dropped. | |
1021 | */ | |
1022 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1023 | { | |
1024 | struct fip_header *fiph; | |
1025 | struct ethhdr *eh; | |
1026 | enum fip_state state; | |
1027 | u16 op; | |
1028 | u8 sub; | |
1029 | ||
1030 | if (skb_linearize(skb)) | |
1031 | goto drop; | |
1032 | if (skb->len < sizeof(*fiph)) | |
1033 | goto drop; | |
1034 | eh = eth_hdr(skb); | |
1035 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1036 | compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS)) | |
1037 | goto drop; | |
1038 | fiph = (struct fip_header *)skb->data; | |
1039 | op = ntohs(fiph->fip_op); | |
1040 | sub = fiph->fip_subcode; | |
1041 | ||
97c8389d JE |
1042 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1043 | goto drop; | |
1044 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1045 | goto drop; | |
1046 | ||
1047 | spin_lock_bh(&fip->lock); | |
1048 | state = fip->state; | |
1049 | if (state == FIP_ST_AUTO) { | |
1050 | fip->map_dest = 0; | |
1051 | fip->state = FIP_ST_ENABLED; | |
1052 | state = FIP_ST_ENABLED; | |
650bd12b | 1053 | LIBFCOE_FIP_DBG("Using FIP mode\n"); |
97c8389d JE |
1054 | } |
1055 | spin_unlock_bh(&fip->lock); | |
1056 | if (state != FIP_ST_ENABLED) | |
1057 | goto drop; | |
1058 | ||
1059 | if (op == FIP_OP_LS) { | |
1060 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1061 | return 0; | |
1062 | } | |
1063 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) | |
1064 | fcoe_ctlr_recv_adv(fip, skb); | |
1065 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1066 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1067 | kfree_skb(skb); | |
1068 | return 0; | |
1069 | drop: | |
1070 | kfree_skb(skb); | |
1071 | return -1; | |
1072 | } | |
1073 | ||
1074 | /** | |
70b51aab RL |
1075 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1076 | * @fip: The FCoE controller | |
97c8389d JE |
1077 | * |
1078 | * If there are conflicting advertisements, no FCF can be chosen. | |
1079 | * | |
1080 | * Called with lock held. | |
1081 | */ | |
1082 | static void fcoe_ctlr_select(struct fcoe_ctlr *fip) | |
1083 | { | |
1084 | struct fcoe_fcf *fcf; | |
1085 | struct fcoe_fcf *best = NULL; | |
1086 | ||
1087 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
650bd12b RL |
1088 | LIBFCOE_FIP_DBG("consider FCF for fab %llx VFID %d map %x " |
1089 | "val %d\n", fcf->fabric_name, fcf->vfid, | |
1090 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); | |
97c8389d | 1091 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
650bd12b RL |
1092 | LIBFCOE_FIP_DBG("FCF for fab %llx map %x %svalid " |
1093 | "%savailable\n", fcf->fabric_name, | |
1094 | fcf->fc_map, (fcf->flags & FIP_FL_SOL) | |
1095 | ? "" : "in", (fcf->flags & FIP_FL_AVAIL) | |
1096 | ? "" : "un"); | |
97c8389d JE |
1097 | continue; |
1098 | } | |
1099 | if (!best) { | |
1100 | best = fcf; | |
1101 | continue; | |
1102 | } | |
1103 | if (fcf->fabric_name != best->fabric_name || | |
1104 | fcf->vfid != best->vfid || | |
1105 | fcf->fc_map != best->fc_map) { | |
650bd12b RL |
1106 | LIBFCOE_FIP_DBG("Conflicting fabric, VFID, " |
1107 | "or FC-MAP\n"); | |
97c8389d JE |
1108 | return; |
1109 | } | |
1110 | if (fcf->pri < best->pri) | |
1111 | best = fcf; | |
1112 | } | |
1113 | fip->sel_fcf = best; | |
1114 | } | |
1115 | ||
1116 | /** | |
70b51aab RL |
1117 | * fcoe_ctlr_timeout() - FIP timeout handler |
1118 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1119 | * |
1120 | * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives. | |
1121 | */ | |
1122 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1123 | { | |
1124 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
1125 | struct fcoe_fcf *sel; | |
1126 | struct fcoe_fcf *fcf; | |
1127 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
97c8389d JE |
1128 | |
1129 | spin_lock_bh(&fip->lock); | |
1130 | if (fip->state == FIP_ST_DISABLED) { | |
1131 | spin_unlock_bh(&fip->lock); | |
1132 | return; | |
1133 | } | |
1134 | ||
1135 | fcf = fip->sel_fcf; | |
1136 | fcoe_ctlr_age_fcfs(fip); | |
1137 | ||
1138 | sel = fip->sel_fcf; | |
1139 | if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) { | |
1140 | fcoe_ctlr_select(fip); | |
1141 | sel = fip->sel_fcf; | |
1142 | fip->sel_time = 0; | |
1143 | } | |
1144 | ||
1145 | if (sel != fcf) { | |
1146 | fcf = sel; /* the old FCF may have been freed */ | |
1147 | if (sel) { | |
650bd12b | 1148 | printk(KERN_INFO "libfcoe: host%d: FIP selected " |
66d6faec JB |
1149 | "Fibre-Channel Forwarder MAC %pM\n", |
1150 | fip->lp->host->host_no, sel->fcf_mac); | |
97c8389d JE |
1151 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); |
1152 | fip->port_ka_time = jiffies + | |
70b51aab | 1153 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
97c8389d JE |
1154 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
1155 | fip->link = 1; | |
1156 | } else { | |
650bd12b | 1157 | printk(KERN_NOTICE "libfcoe: host%d: " |
70b51aab | 1158 | "FIP Fibre-Channel Forwarder timed out. " |
97c8389d JE |
1159 | "Starting FCF discovery.\n", |
1160 | fip->lp->host->host_no); | |
1161 | fip->link = 0; | |
1162 | } | |
1163 | schedule_work(&fip->link_work); | |
1164 | } | |
1165 | ||
97c8389d JE |
1166 | if (sel) { |
1167 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { | |
1168 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
11b56188 | 1169 | fip->send_ctlr_ka = 1; |
97c8389d JE |
1170 | } |
1171 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1172 | next_timer = fip->ctlr_ka_time; | |
1173 | ||
1174 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
1175 | fip->port_ka_time += jiffies + | |
70b51aab | 1176 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
11b56188 | 1177 | fip->send_port_ka = 1; |
97c8389d JE |
1178 | } |
1179 | if (time_after(next_timer, fip->port_ka_time)) | |
1180 | next_timer = fip->port_ka_time; | |
1181 | mod_timer(&fip->timer, next_timer); | |
1182 | } else if (fip->sel_time) { | |
1183 | next_timer = fip->sel_time + | |
70b51aab | 1184 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1185 | mod_timer(&fip->timer, next_timer); |
1186 | } | |
11b56188 CL |
1187 | if (fip->send_ctlr_ka || fip->send_port_ka) |
1188 | schedule_work(&fip->link_work); | |
97c8389d | 1189 | spin_unlock_bh(&fip->lock); |
97c8389d JE |
1190 | } |
1191 | ||
1192 | /** | |
70b51aab RL |
1193 | * fcoe_ctlr_link_work() - Worker thread function for link changes |
1194 | * @work: Handle to a FCoE controller | |
97c8389d JE |
1195 | * |
1196 | * See if the link status has changed and if so, report it. | |
1197 | * | |
1198 | * This is here because fc_linkup() and fc_linkdown() must not | |
1199 | * be called from the timer directly, since they use a mutex. | |
1200 | */ | |
1201 | static void fcoe_ctlr_link_work(struct work_struct *work) | |
1202 | { | |
1203 | struct fcoe_ctlr *fip; | |
11b56188 CL |
1204 | struct fc_lport *vport; |
1205 | u8 *mac; | |
97c8389d JE |
1206 | int link; |
1207 | int last_link; | |
1208 | ||
1209 | fip = container_of(work, struct fcoe_ctlr, link_work); | |
1210 | spin_lock_bh(&fip->lock); | |
1211 | last_link = fip->last_link; | |
1212 | link = fip->link; | |
1213 | fip->last_link = link; | |
1214 | spin_unlock_bh(&fip->lock); | |
1215 | ||
1216 | if (last_link != link) { | |
1217 | if (link) | |
1218 | fc_linkup(fip->lp); | |
1219 | else | |
1220 | fcoe_ctlr_reset(fip, FIP_ST_LINK_WAIT); | |
1221 | } | |
11b56188 CL |
1222 | |
1223 | if (fip->send_ctlr_ka) { | |
1224 | fip->send_ctlr_ka = 0; | |
1225 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); | |
1226 | } | |
1227 | if (fip->send_port_ka) { | |
1228 | fip->send_port_ka = 0; | |
1229 | mutex_lock(&fip->lp->lp_mutex); | |
1230 | mac = fip->get_src_addr(fip->lp); | |
1231 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1232 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1233 | mac = fip->get_src_addr(vport); | |
1234 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1235 | } | |
1236 | mutex_unlock(&fip->lp->lp_mutex); | |
1237 | } | |
97c8389d JE |
1238 | } |
1239 | ||
1240 | /** | |
70b51aab RL |
1241 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1242 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1243 | */ |
1244 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1245 | { | |
1246 | struct fcoe_ctlr *fip; | |
1247 | struct sk_buff *skb; | |
1248 | ||
1249 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1250 | spin_lock_bh(&fip->fip_recv_list.lock); | |
1251 | while ((skb = __skb_dequeue(&fip->fip_recv_list))) { | |
1252 | spin_unlock_bh(&fip->fip_recv_list.lock); | |
1253 | fcoe_ctlr_recv_handler(fip, skb); | |
1254 | spin_lock_bh(&fip->fip_recv_list.lock); | |
1255 | } | |
1256 | spin_unlock_bh(&fip->fip_recv_list.lock); | |
1257 | } | |
1258 | ||
1259 | /** | |
70b51aab RL |
1260 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response or request |
1261 | * @fip: The FCoE controller | |
1262 | * @fp: The FC frame to snoop | |
1263 | * @sa: Ethernet source MAC address from received FCoE frame | |
97c8389d JE |
1264 | * |
1265 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1266 | * | |
1267 | * The caller has checked that we are waiting for login as indicated | |
1268 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1269 | * | |
1270 | * The caller is responsible for freeing the frame. | |
1271 | * | |
1272 | * Return non-zero if the frame should not be delivered to libfc. | |
1273 | */ | |
11b56188 CL |
1274 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
1275 | struct fc_frame *fp, u8 *sa) | |
97c8389d JE |
1276 | { |
1277 | struct fc_frame_header *fh; | |
1278 | u8 op; | |
1279 | u8 mac[ETH_ALEN]; | |
1280 | ||
1281 | fh = fc_frame_header_get(fp); | |
1282 | if (fh->fh_type != FC_TYPE_ELS) | |
1283 | return 0; | |
1284 | ||
1285 | op = fc_frame_payload_op(fp); | |
1286 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1287 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1288 | ||
1289 | spin_lock_bh(&fip->lock); | |
1290 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { | |
1291 | spin_unlock_bh(&fip->lock); | |
1292 | return -EINVAL; | |
1293 | } | |
1294 | fip->state = FIP_ST_NON_FIP; | |
650bd12b | 1295 | LIBFCOE_FIP_DBG("received FLOGI LS_ACC using non-FIP mode\n"); |
97c8389d JE |
1296 | |
1297 | /* | |
1298 | * FLOGI accepted. | |
1299 | * If the src mac addr is FC_OUI-based, then we mark the | |
1300 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1301 | * Otherwise we use the FCoE gateway addr | |
1302 | */ | |
1303 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
1304 | fip->map_dest = 1; | |
1305 | } else { | |
1306 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1307 | fip->map_dest = 0; | |
1308 | } | |
1309 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
11b56188 CL |
1310 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
1311 | fip->update_mac(lport, mac); | |
97c8389d | 1312 | spin_unlock_bh(&fip->lock); |
97c8389d JE |
1313 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1314 | /* | |
1315 | * Save source MAC for point-to-point responses. | |
1316 | */ | |
1317 | spin_lock_bh(&fip->lock); | |
1318 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { | |
1319 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1320 | fip->map_dest = 0; | |
1321 | if (fip->state == FIP_ST_NON_FIP) | |
650bd12b | 1322 | LIBFCOE_FIP_DBG("received FLOGI REQ, " |
97c8389d JE |
1323 | "using non-FIP mode\n"); |
1324 | fip->state = FIP_ST_NON_FIP; | |
1325 | } | |
1326 | spin_unlock_bh(&fip->lock); | |
1327 | } | |
1328 | return 0; | |
1329 | } | |
1330 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1331 | ||
5e80f7f7 | 1332 | /** |
70b51aab RL |
1333 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1334 | * @mac: The MAC address to convert | |
1335 | * @scheme: The scheme to use when converting | |
1336 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1337 | * |
1338 | * Returns: u64 fc world wide name | |
1339 | */ | |
1340 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1341 | unsigned int scheme, unsigned int port) | |
1342 | { | |
1343 | u64 wwn; | |
1344 | u64 host_mac; | |
1345 | ||
1346 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1347 | host_mac = ((u64) mac[0] << 40) | | |
1348 | ((u64) mac[1] << 32) | | |
1349 | ((u64) mac[2] << 24) | | |
1350 | ((u64) mac[3] << 16) | | |
1351 | ((u64) mac[4] << 8) | | |
1352 | (u64) mac[5]; | |
1353 | ||
1354 | WARN_ON(host_mac >= (1ULL << 48)); | |
1355 | wwn = host_mac | ((u64) scheme << 60); | |
1356 | switch (scheme) { | |
1357 | case 1: | |
1358 | WARN_ON(port != 0); | |
1359 | break; | |
1360 | case 2: | |
1361 | WARN_ON(port >= 0xfff); | |
1362 | wwn |= (u64) port << 48; | |
1363 | break; | |
1364 | default: | |
1365 | WARN_ON(1); | |
1366 | break; | |
1367 | } | |
1368 | ||
1369 | return wwn; | |
1370 | } | |
1371 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1372 | ||
1373 | /** | |
70b51aab RL |
1374 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
1375 | * @lp: The local port to configure libfc for | |
1376 | * @tt: The libfc function template | |
5e80f7f7 VD |
1377 | * |
1378 | * Returns : 0 for success | |
1379 | */ | |
70b51aab RL |
1380 | int fcoe_libfc_config(struct fc_lport *lport, |
1381 | struct libfc_function_template *tt) | |
5e80f7f7 VD |
1382 | { |
1383 | /* Set the function pointers set by the LLDD */ | |
70b51aab RL |
1384 | memcpy(&lport->tt, tt, sizeof(*tt)); |
1385 | if (fc_fcp_init(lport)) | |
5e80f7f7 | 1386 | return -ENOMEM; |
70b51aab RL |
1387 | fc_exch_init(lport); |
1388 | fc_elsct_init(lport); | |
1389 | fc_lport_init(lport); | |
1390 | fc_rport_init(lport); | |
1391 | fc_disc_init(lport); | |
5e80f7f7 VD |
1392 | |
1393 | return 0; | |
1394 | } | |
1395 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); | |
11b56188 | 1396 |