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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> | |
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 | |
0f51c2e5 | 77 | #define LIBFCOE_FIP_DBG(fip, fmt, args...) \ |
650bd12b | 78 | LIBFCOE_CHECK_LOGGING(LIBFCOE_FIP_LOGGING, \ |
0f51c2e5 JE |
79 | printk(KERN_INFO "host%d: fip: " fmt, \ |
80 | (fip)->lp->host->host_no, ##args);) | |
97c8389d | 81 | |
70b51aab RL |
82 | /** |
83 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
84 | * @fcf: The FCF to check | |
85 | * | |
97c8389d JE |
86 | * Return non-zero if FCF fcoe_size has been validated. |
87 | */ | |
88 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
89 | { | |
90 | return (fcf->flags & FIP_FL_SOL) != 0; | |
91 | } | |
92 | ||
70b51aab RL |
93 | /** |
94 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
95 | * @fcf: The FCF to check | |
96 | * | |
97c8389d JE |
97 | * Return non-zero if the FCF is usable. |
98 | */ | |
99 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
100 | { | |
101 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
102 | ||
103 | return (fcf->flags & flags) == flags; | |
104 | } | |
105 | ||
106 | /** | |
70b51aab RL |
107 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
108 | * @fip: The FCoE controller to initialize | |
97c8389d JE |
109 | */ |
110 | void fcoe_ctlr_init(struct fcoe_ctlr *fip) | |
111 | { | |
112 | fip->state = FIP_ST_LINK_WAIT; | |
22bcd225 | 113 | fip->mode = FIP_ST_AUTO; |
97c8389d JE |
114 | INIT_LIST_HEAD(&fip->fcfs); |
115 | spin_lock_init(&fip->lock); | |
116 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
117 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
118 | INIT_WORK(&fip->link_work, fcoe_ctlr_link_work); | |
119 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); | |
120 | skb_queue_head_init(&fip->fip_recv_list); | |
121 | } | |
122 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
123 | ||
124 | /** | |
70b51aab RL |
125 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
126 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
127 | * |
128 | * Called with &fcoe_ctlr lock held. | |
129 | */ | |
130 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
131 | { | |
132 | struct fcoe_fcf *fcf; | |
133 | struct fcoe_fcf *next; | |
134 | ||
135 | fip->sel_fcf = NULL; | |
136 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
137 | list_del(&fcf->list); | |
138 | kfree(fcf); | |
139 | } | |
140 | fip->fcf_count = 0; | |
141 | fip->sel_time = 0; | |
142 | } | |
143 | ||
144 | /** | |
70b51aab RL |
145 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
146 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
147 | * |
148 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
149 | * | |
150 | * The receive handler will have been deleted before this to guarantee | |
151 | * that no more recv_work will be scheduled. | |
152 | * | |
153 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
154 | * This guarantees that no further timeouts or work will be scheduled. | |
155 | */ | |
156 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
157 | { | |
a4b7cfae | 158 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 159 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 160 | |
97c8389d JE |
161 | spin_lock_bh(&fip->lock); |
162 | fip->state = FIP_ST_DISABLED; | |
163 | fcoe_ctlr_reset_fcfs(fip); | |
164 | spin_unlock_bh(&fip->lock); | |
165 | del_timer_sync(&fip->timer); | |
a4b7cfae | 166 | cancel_work_sync(&fip->link_work); |
97c8389d JE |
167 | } |
168 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
169 | ||
170 | /** | |
70b51aab RL |
171 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
172 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
173 | * |
174 | * Returns the maximum packet size including the FCoE header and trailer, | |
175 | * but not including any Ethernet or VLAN headers. | |
176 | */ | |
177 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
178 | { | |
179 | /* | |
180 | * Determine the max FCoE frame size allowed, including | |
181 | * FCoE header and trailer. | |
182 | * Note: lp->mfs is currently the payload size, not the frame size. | |
183 | */ | |
184 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
185 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
186 | } | |
187 | ||
188 | /** | |
70b51aab RL |
189 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
190 | * @fip: The FCoE controller to send the solicitation on | |
191 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
192 | */ |
193 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
194 | { | |
195 | struct sk_buff *skb; | |
196 | struct fip_sol { | |
197 | struct ethhdr eth; | |
198 | struct fip_header fip; | |
199 | struct { | |
200 | struct fip_mac_desc mac; | |
201 | struct fip_wwn_desc wwnn; | |
202 | struct fip_size_desc size; | |
203 | } __attribute__((packed)) desc; | |
204 | } __attribute__((packed)) *sol; | |
205 | u32 fcoe_size; | |
206 | ||
207 | skb = dev_alloc_skb(sizeof(*sol)); | |
208 | if (!skb) | |
209 | return; | |
210 | ||
211 | sol = (struct fip_sol *)skb->data; | |
212 | ||
213 | memset(sol, 0, sizeof(*sol)); | |
214 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
215 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
216 | sol->eth.h_proto = htons(ETH_P_FIP); | |
217 | ||
218 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
219 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
220 | sol->fip.fip_subcode = FIP_SC_SOL; | |
221 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
222 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
223 | if (fip->spma) |
224 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
225 | |
226 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
227 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
228 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
229 | ||
230 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
231 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
232 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
233 | ||
234 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
235 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
236 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
237 | sol->desc.size.fd_size = htons(fcoe_size); | |
238 | ||
239 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 240 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
241 | skb_reset_mac_header(skb); |
242 | skb_reset_network_header(skb); | |
243 | fip->send(fip, skb); | |
244 | ||
245 | if (!fcf) | |
246 | fip->sol_time = jiffies; | |
247 | } | |
248 | ||
249 | /** | |
70b51aab RL |
250 | * fcoe_ctlr_link_up() - Start FCoE controller |
251 | * @fip: The FCoE controller to start | |
97c8389d JE |
252 | * |
253 | * Called from the LLD when the network link is ready. | |
254 | */ | |
255 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
256 | { | |
257 | spin_lock_bh(&fip->lock); | |
258 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { | |
259 | fip->last_link = 1; | |
260 | fip->link = 1; | |
261 | spin_unlock_bh(&fip->lock); | |
262 | fc_linkup(fip->lp); | |
263 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
22bcd225 | 264 | fip->state = fip->mode; |
97c8389d JE |
265 | fip->last_link = 1; |
266 | fip->link = 1; | |
267 | spin_unlock_bh(&fip->lock); | |
22bcd225 | 268 | if (fip->state == FIP_ST_AUTO) |
0f51c2e5 | 269 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
97c8389d JE |
270 | fc_linkup(fip->lp); |
271 | fcoe_ctlr_solicit(fip, NULL); | |
272 | } else | |
273 | spin_unlock_bh(&fip->lock); | |
274 | } | |
275 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
276 | ||
277 | /** | |
70b51aab RL |
278 | * fcoe_ctlr_reset() - Reset a FCoE controller |
279 | * @fip: The FCoE controller to reset | |
97c8389d | 280 | */ |
dd42dac4 | 281 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 282 | { |
97c8389d JE |
283 | fcoe_ctlr_reset_fcfs(fip); |
284 | del_timer(&fip->timer); | |
97c8389d JE |
285 | fip->ctlr_ka_time = 0; |
286 | fip->port_ka_time = 0; | |
287 | fip->sol_time = 0; | |
288 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
289 | fip->map_dest = 0; | |
97c8389d JE |
290 | } |
291 | ||
292 | /** | |
70b51aab RL |
293 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
294 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
295 | * |
296 | * Returns non-zero if the link was up and now isn't. | |
297 | * | |
298 | * Called from the LLD when the network link is not ready. | |
299 | * There may be multiple calls while the link is down. | |
300 | */ | |
301 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
302 | { | |
dd42dac4 JE |
303 | int link_dropped; |
304 | ||
305 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
306 | spin_lock_bh(&fip->lock); | |
307 | fcoe_ctlr_reset(fip); | |
308 | link_dropped = fip->link; | |
309 | fip->link = 0; | |
310 | fip->last_link = 0; | |
311 | fip->state = FIP_ST_LINK_WAIT; | |
312 | spin_unlock_bh(&fip->lock); | |
313 | ||
314 | if (link_dropped) | |
315 | fc_linkdown(fip->lp); | |
316 | return link_dropped; | |
97c8389d JE |
317 | } |
318 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
319 | ||
320 | /** | |
70b51aab RL |
321 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
322 | * @fip: The FCoE controller to send the FKA on | |
323 | * @lport: libfc fc_lport to send from | |
324 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
325 | * @sa: The source MAC address | |
97c8389d JE |
326 | * |
327 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
328 | * The source MAC is the native MAC address. | |
329 | * | |
330 | * A port keep-alive is sent every 90 seconds while logged in. | |
331 | * The source MAC is the assigned mapped source address. | |
332 | * The destination is the FCF's F-port. | |
333 | */ | |
11b56188 CL |
334 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
335 | struct fc_lport *lport, | |
336 | int ports, u8 *sa) | |
97c8389d JE |
337 | { |
338 | struct sk_buff *skb; | |
339 | struct fip_kal { | |
340 | struct ethhdr eth; | |
341 | struct fip_header fip; | |
342 | struct fip_mac_desc mac; | |
343 | } __attribute__((packed)) *kal; | |
344 | struct fip_vn_desc *vn; | |
345 | u32 len; | |
346 | struct fc_lport *lp; | |
347 | struct fcoe_fcf *fcf; | |
348 | ||
349 | fcf = fip->sel_fcf; | |
350 | lp = fip->lp; | |
351 | if (!fcf || !fc_host_port_id(lp->host)) | |
352 | return; | |
353 | ||
354 | len = fcoe_ctlr_fcoe_size(fip) + sizeof(struct ethhdr); | |
355 | BUG_ON(len < sizeof(*kal) + sizeof(*vn)); | |
356 | skb = dev_alloc_skb(len); | |
357 | if (!skb) | |
358 | return; | |
359 | ||
360 | kal = (struct fip_kal *)skb->data; | |
361 | memset(kal, 0, len); | |
362 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
363 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
364 | kal->eth.h_proto = htons(ETH_P_FIP); | |
365 | ||
366 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
367 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
368 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
369 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 370 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 371 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
372 | if (fip->spma) |
373 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
374 | |
375 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
376 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
377 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
378 | if (ports) { |
379 | vn = (struct fip_vn_desc *)(kal + 1); | |
380 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
381 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 382 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
97c8389d JE |
383 | hton24(vn->fd_fc_id, fc_host_port_id(lp->host)); |
384 | put_unaligned_be64(lp->wwpn, &vn->fd_wwpn); | |
385 | } | |
97c8389d | 386 | skb_put(skb, len); |
0f491539 | 387 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
388 | skb_reset_mac_header(skb); |
389 | skb_reset_network_header(skb); | |
390 | fip->send(fip, skb); | |
391 | } | |
392 | ||
393 | /** | |
70b51aab RL |
394 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
395 | * @fip: The FCoE controller for the ELS frame | |
396 | * @dtype: The FIP descriptor type for the frame | |
397 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
97c8389d JE |
398 | * |
399 | * Returns non-zero error code on failure. | |
400 | * | |
401 | * The caller must check that the length is a multiple of 4. | |
402 | * | |
403 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
404 | * Headroom includes the FIP encapsulation description, FIP header, and | |
405 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
406 | */ | |
11b56188 | 407 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
97c8389d JE |
408 | u8 dtype, struct sk_buff *skb) |
409 | { | |
410 | struct fip_encaps_head { | |
411 | struct ethhdr eth; | |
412 | struct fip_header fip; | |
413 | struct fip_encaps encaps; | |
414 | } __attribute__((packed)) *cap; | |
415 | struct fip_mac_desc *mac; | |
416 | struct fcoe_fcf *fcf; | |
417 | size_t dlen; | |
5a84baea | 418 | u16 fip_flags; |
97c8389d JE |
419 | |
420 | fcf = fip->sel_fcf; | |
421 | if (!fcf) | |
422 | return -ENODEV; | |
5a84baea YZ |
423 | |
424 | /* set flags according to both FCF and lport's capability on SPMA */ | |
425 | fip_flags = fcf->flags; | |
426 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : FIP_FL_FPMA; | |
427 | if (!fip_flags) | |
428 | return -ENODEV; | |
429 | ||
97c8389d JE |
430 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
431 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
432 | ||
433 | memset(cap, 0, sizeof(*cap)); | |
434 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
435 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
436 | cap->eth.h_proto = htons(ETH_P_FIP); | |
437 | ||
438 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
439 | cap->fip.fip_op = htons(FIP_OP_LS); | |
440 | cap->fip.fip_subcode = FIP_SC_REQ; | |
441 | cap->fip.fip_dl_len = htons((dlen + sizeof(*mac)) / FIP_BPW); | |
5a84baea | 442 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
443 | |
444 | cap->encaps.fd_desc.fip_dtype = dtype; | |
445 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
446 | ||
447 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
448 | memset(mac, 0, sizeof(mac)); | |
449 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
450 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
db36c06c | 451 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) |
11b56188 | 452 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
184dd345 VD |
453 | else if (fip->spma) |
454 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d | 455 | |
0f491539 | 456 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
457 | skb_reset_mac_header(skb); |
458 | skb_reset_network_header(skb); | |
459 | return 0; | |
460 | } | |
461 | ||
462 | /** | |
463 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
464 | * @fip: FCoE controller. | |
11b56188 | 465 | * @lport: libfc fc_lport to send from |
97c8389d JE |
466 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
467 | * | |
468 | * Returns a non-zero error code if the frame should not be sent. | |
469 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
470 | * | |
471 | * The caller must check that the length is a multiple of 4. | |
472 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
473 | */ | |
11b56188 CL |
474 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
475 | struct sk_buff *skb) | |
97c8389d JE |
476 | { |
477 | struct fc_frame_header *fh; | |
478 | u16 old_xid; | |
479 | u8 op; | |
11b56188 | 480 | u8 mac[ETH_ALEN]; |
97c8389d | 481 | |
97c8389d JE |
482 | fh = (struct fc_frame_header *)skb->data; |
483 | op = *(u8 *)(fh + 1); | |
484 | ||
5f48f70e | 485 | if (op == ELS_FLOGI) { |
97c8389d JE |
486 | old_xid = fip->flogi_oxid; |
487 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
488 | if (fip->state == FIP_ST_AUTO) { | |
489 | if (old_xid == FC_XID_UNKNOWN) | |
490 | fip->flogi_count = 0; | |
491 | fip->flogi_count++; | |
492 | if (fip->flogi_count < 3) | |
493 | goto drop; | |
494 | fip->map_dest = 1; | |
495 | return 0; | |
496 | } | |
5f48f70e JE |
497 | if (fip->state == FIP_ST_NON_FIP) |
498 | fip->map_dest = 1; | |
499 | } | |
500 | ||
501 | if (fip->state == FIP_ST_NON_FIP) | |
502 | return 0; | |
f31f2a1c JE |
503 | if (!fip->sel_fcf) |
504 | goto drop; | |
5f48f70e JE |
505 | |
506 | switch (op) { | |
507 | case ELS_FLOGI: | |
97c8389d JE |
508 | op = FIP_DT_FLOGI; |
509 | break; | |
510 | case ELS_FDISC: | |
511 | if (ntoh24(fh->fh_s_id)) | |
512 | return 0; | |
513 | op = FIP_DT_FDISC; | |
514 | break; | |
515 | case ELS_LOGO: | |
516 | if (fip->state != FIP_ST_ENABLED) | |
517 | return 0; | |
518 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
519 | return 0; | |
520 | op = FIP_DT_LOGO; | |
521 | break; | |
522 | case ELS_LS_ACC: | |
523 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
524 | return 0; | |
525 | if (!ntoh24(fh->fh_s_id)) | |
526 | return 0; | |
527 | if (fip->state == FIP_ST_AUTO) | |
528 | return 0; | |
529 | /* | |
530 | * Here we must've gotten an SID by accepting an FLOGI | |
531 | * from a point-to-point connection. Switch to using | |
532 | * the source mac based on the SID. The destination | |
533 | * MAC in this case would have been set by receving the | |
534 | * FLOGI. | |
535 | */ | |
536 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
11b56188 CL |
537 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
538 | fip->update_mac(lport, mac); | |
97c8389d JE |
539 | return 0; |
540 | default: | |
541 | if (fip->state != FIP_ST_ENABLED) | |
542 | goto drop; | |
543 | return 0; | |
544 | } | |
11b56188 | 545 | if (fcoe_ctlr_encaps(fip, lport, op, skb)) |
97c8389d JE |
546 | goto drop; |
547 | fip->send(fip, skb); | |
548 | return -EINPROGRESS; | |
549 | drop: | |
550 | kfree_skb(skb); | |
551 | return -EINVAL; | |
552 | } | |
553 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
554 | ||
70b51aab RL |
555 | /** |
556 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
557 | * @fip: The FCoE controller to free FCFs on | |
97c8389d JE |
558 | * |
559 | * Called with lock held. | |
560 | * | |
561 | * An FCF is considered old if we have missed three advertisements. | |
562 | * That is, there have been no valid advertisement from it for three | |
563 | * times its keep-alive period including fuzz. | |
564 | * | |
565 | * In addition, determine the time when an FCF selection can occur. | |
566 | */ | |
567 | static void fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) | |
568 | { | |
569 | struct fcoe_fcf *fcf; | |
570 | struct fcoe_fcf *next; | |
571 | unsigned long sel_time = 0; | |
572 | ||
573 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
574 | if (time_after(jiffies, fcf->time + fcf->fka_period * 3 + | |
575 | msecs_to_jiffies(FIP_FCF_FUZZ * 3))) { | |
576 | if (fip->sel_fcf == fcf) | |
577 | fip->sel_fcf = NULL; | |
578 | list_del(&fcf->list); | |
579 | WARN_ON(!fip->fcf_count); | |
580 | fip->fcf_count--; | |
581 | kfree(fcf); | |
582 | } else if (fcoe_ctlr_mtu_valid(fcf) && | |
583 | (!sel_time || time_before(sel_time, fcf->time))) { | |
584 | sel_time = fcf->time; | |
585 | } | |
586 | } | |
587 | if (sel_time) { | |
588 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); | |
589 | fip->sel_time = sel_time; | |
590 | if (time_before(sel_time, fip->timer.expires)) | |
591 | mod_timer(&fip->timer, sel_time); | |
592 | } else { | |
593 | fip->sel_time = 0; | |
594 | } | |
595 | } | |
596 | ||
597 | /** | |
70b51aab | 598 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 599 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
600 | * @skb: The received FIP advertisement frame |
601 | * @fcf: The resulting FCF entry | |
97c8389d JE |
602 | * |
603 | * Returns zero on a valid parsed advertisement, | |
604 | * otherwise returns non zero value. | |
605 | */ | |
0f51c2e5 JE |
606 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
607 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
608 | { |
609 | struct fip_header *fiph; | |
610 | struct fip_desc *desc = NULL; | |
611 | struct fip_wwn_desc *wwn; | |
612 | struct fip_fab_desc *fab; | |
613 | struct fip_fka_desc *fka; | |
614 | unsigned long t; | |
615 | size_t rlen; | |
616 | size_t dlen; | |
617 | ||
618 | memset(fcf, 0, sizeof(*fcf)); | |
619 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
620 | ||
621 | fiph = (struct fip_header *)skb->data; | |
622 | fcf->flags = ntohs(fiph->fip_flags); | |
623 | ||
624 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
625 | if (rlen + sizeof(*fiph) > skb->len) | |
626 | return -EINVAL; | |
627 | ||
628 | desc = (struct fip_desc *)(fiph + 1); | |
629 | while (rlen > 0) { | |
630 | dlen = desc->fip_dlen * FIP_BPW; | |
631 | if (dlen < sizeof(*desc) || dlen > rlen) | |
632 | return -EINVAL; | |
633 | switch (desc->fip_dtype) { | |
634 | case FIP_DT_PRI: | |
635 | if (dlen != sizeof(struct fip_pri_desc)) | |
636 | goto len_err; | |
637 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
638 | break; | |
639 | case FIP_DT_MAC: | |
640 | if (dlen != sizeof(struct fip_mac_desc)) | |
641 | goto len_err; | |
642 | memcpy(fcf->fcf_mac, | |
643 | ((struct fip_mac_desc *)desc)->fd_mac, | |
644 | ETH_ALEN); | |
645 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
0f51c2e5 | 646 | LIBFCOE_FIP_DBG(fip, "Invalid MAC address " |
650bd12b | 647 | "in FIP adv\n"); |
97c8389d JE |
648 | return -EINVAL; |
649 | } | |
650 | break; | |
651 | case FIP_DT_NAME: | |
652 | if (dlen != sizeof(struct fip_wwn_desc)) | |
653 | goto len_err; | |
654 | wwn = (struct fip_wwn_desc *)desc; | |
655 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
656 | break; | |
657 | case FIP_DT_FAB: | |
658 | if (dlen != sizeof(struct fip_fab_desc)) | |
659 | goto len_err; | |
660 | fab = (struct fip_fab_desc *)desc; | |
661 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
662 | fcf->vfid = ntohs(fab->fd_vfid); | |
663 | fcf->fc_map = ntoh24(fab->fd_map); | |
664 | break; | |
665 | case FIP_DT_FKA: | |
666 | if (dlen != sizeof(struct fip_fka_desc)) | |
667 | goto len_err; | |
668 | fka = (struct fip_fka_desc *)desc; | |
669 | t = ntohl(fka->fd_fka_period); | |
670 | if (t >= FCOE_CTLR_MIN_FKA) | |
671 | fcf->fka_period = msecs_to_jiffies(t); | |
672 | break; | |
673 | case FIP_DT_MAP_OUI: | |
674 | case FIP_DT_FCOE_SIZE: | |
675 | case FIP_DT_FLOGI: | |
676 | case FIP_DT_FDISC: | |
677 | case FIP_DT_LOGO: | |
678 | case FIP_DT_ELP: | |
679 | default: | |
0f51c2e5 | 680 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 681 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
682 | /* standard says ignore unknown descriptors >= 128 */ |
683 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
684 | return -EINVAL; | |
685 | continue; | |
686 | } | |
687 | desc = (struct fip_desc *)((char *)desc + dlen); | |
688 | rlen -= dlen; | |
689 | } | |
690 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
691 | return -EINVAL; | |
692 | if (!fcf->switch_name || !fcf->fabric_name) | |
693 | return -EINVAL; | |
694 | return 0; | |
695 | ||
696 | len_err: | |
0f51c2e5 | 697 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 698 | desc->fip_dtype, dlen); |
97c8389d JE |
699 | return -EINVAL; |
700 | } | |
701 | ||
702 | /** | |
70b51aab RL |
703 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
704 | * @fip: The FCoE controller receiving the advertisement | |
705 | * @skb: The received FIP packet | |
97c8389d JE |
706 | */ |
707 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
708 | { | |
709 | struct fcoe_fcf *fcf; | |
710 | struct fcoe_fcf new; | |
711 | struct fcoe_fcf *found; | |
712 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
713 | int first = 0; | |
714 | int mtu_valid; | |
715 | ||
0f51c2e5 | 716 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
717 | return; |
718 | ||
719 | spin_lock_bh(&fip->lock); | |
720 | first = list_empty(&fip->fcfs); | |
721 | found = NULL; | |
722 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
723 | if (fcf->switch_name == new.switch_name && | |
724 | fcf->fabric_name == new.fabric_name && | |
725 | fcf->fc_map == new.fc_map && | |
726 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
727 | found = fcf; | |
728 | break; | |
729 | } | |
730 | } | |
731 | if (!found) { | |
732 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
733 | goto out; | |
734 | ||
735 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
736 | if (!fcf) | |
737 | goto out; | |
738 | ||
739 | fip->fcf_count++; | |
740 | memcpy(fcf, &new, sizeof(new)); | |
741 | list_add(&fcf->list, &fip->fcfs); | |
742 | } else { | |
743 | /* | |
744 | * Flags in advertisements are ignored once the FCF is | |
745 | * selected. Flags in unsolicited advertisements are | |
746 | * ignored after a usable solicited advertisement | |
747 | * has been received. | |
748 | */ | |
749 | if (fcf == fip->sel_fcf) { | |
750 | fip->ctlr_ka_time -= fcf->fka_period; | |
751 | fip->ctlr_ka_time += new.fka_period; | |
752 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
753 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
754 | } else if (!fcoe_ctlr_fcf_usable(fcf)) | |
755 | fcf->flags = new.flags; | |
756 | fcf->fka_period = new.fka_period; | |
757 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
758 | } | |
759 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
760 | fcf->time = jiffies; | |
650bd12b | 761 | if (!found) { |
0f51c2e5 | 762 | LIBFCOE_FIP_DBG(fip, "New FCF for fab %llx map %x val %d\n", |
650bd12b RL |
763 | fcf->fabric_name, fcf->fc_map, mtu_valid); |
764 | } | |
97c8389d JE |
765 | |
766 | /* | |
767 | * If this advertisement is not solicited and our max receive size | |
768 | * hasn't been verified, send a solicited advertisement. | |
769 | */ | |
770 | if (!mtu_valid) | |
771 | fcoe_ctlr_solicit(fip, fcf); | |
772 | ||
773 | /* | |
774 | * If its been a while since we did a solicit, and this is | |
775 | * the first advertisement we've received, do a multicast | |
776 | * solicitation to gather as many advertisements as we can | |
777 | * before selection occurs. | |
778 | */ | |
779 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
780 | fcoe_ctlr_solicit(fip, NULL); | |
781 | ||
782 | /* | |
783 | * If this is the first validated FCF, note the time and | |
784 | * set a timer to trigger selection. | |
785 | */ | |
786 | if (mtu_valid && !fip->sel_time && fcoe_ctlr_fcf_usable(fcf)) { | |
787 | fip->sel_time = jiffies + | |
70b51aab | 788 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
789 | if (!timer_pending(&fip->timer) || |
790 | time_before(fip->sel_time, fip->timer.expires)) | |
791 | mod_timer(&fip->timer, fip->sel_time); | |
792 | } | |
793 | out: | |
794 | spin_unlock_bh(&fip->lock); | |
795 | } | |
796 | ||
797 | /** | |
70b51aab RL |
798 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
799 | * @fip: The FCoE controller which received the packet | |
800 | * @skb: The received FIP packet | |
97c8389d JE |
801 | */ |
802 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
803 | { | |
70b51aab | 804 | struct fc_lport *lport = fip->lp; |
97c8389d | 805 | struct fip_header *fiph; |
11b56188 | 806 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
807 | struct fc_frame_header *fh = NULL; |
808 | struct fip_desc *desc; | |
809 | struct fip_encaps *els; | |
810 | struct fcoe_dev_stats *stats; | |
811 | enum fip_desc_type els_dtype = 0; | |
812 | u8 els_op; | |
813 | u8 sub; | |
814 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
815 | size_t els_len = 0; | |
816 | size_t rlen; | |
817 | size_t dlen; | |
818 | ||
819 | fiph = (struct fip_header *)skb->data; | |
820 | sub = fiph->fip_subcode; | |
821 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
822 | goto drop; | |
823 | ||
824 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
825 | if (rlen + sizeof(*fiph) > skb->len) | |
826 | goto drop; | |
827 | ||
828 | desc = (struct fip_desc *)(fiph + 1); | |
829 | while (rlen > 0) { | |
830 | dlen = desc->fip_dlen * FIP_BPW; | |
831 | if (dlen < sizeof(*desc) || dlen > rlen) | |
832 | goto drop; | |
833 | switch (desc->fip_dtype) { | |
834 | case FIP_DT_MAC: | |
835 | if (dlen != sizeof(struct fip_mac_desc)) | |
836 | goto len_err; | |
837 | memcpy(granted_mac, | |
838 | ((struct fip_mac_desc *)desc)->fd_mac, | |
839 | ETH_ALEN); | |
840 | if (!is_valid_ether_addr(granted_mac)) { | |
0f51c2e5 | 841 | LIBFCOE_FIP_DBG(fip, "Invalid MAC address " |
650bd12b | 842 | "in FIP ELS\n"); |
97c8389d JE |
843 | goto drop; |
844 | } | |
11b56188 | 845 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); |
97c8389d JE |
846 | break; |
847 | case FIP_DT_FLOGI: | |
848 | case FIP_DT_FDISC: | |
849 | case FIP_DT_LOGO: | |
850 | case FIP_DT_ELP: | |
851 | if (fh) | |
852 | goto drop; | |
853 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
854 | goto len_err; | |
855 | els_len = dlen - sizeof(*els); | |
856 | els = (struct fip_encaps *)desc; | |
857 | fh = (struct fc_frame_header *)(els + 1); | |
858 | els_dtype = desc->fip_dtype; | |
859 | break; | |
860 | default: | |
0f51c2e5 | 861 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 862 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
863 | /* standard says ignore unknown descriptors >= 128 */ |
864 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
865 | goto drop; | |
866 | continue; | |
867 | } | |
868 | desc = (struct fip_desc *)((char *)desc + dlen); | |
869 | rlen -= dlen; | |
870 | } | |
871 | ||
872 | if (!fh) | |
873 | goto drop; | |
874 | els_op = *(u8 *)(fh + 1); | |
875 | ||
11b56188 CL |
876 | if (els_dtype == FIP_DT_FLOGI && sub == FIP_SC_REP && |
877 | fip->flogi_oxid == ntohs(fh->fh_ox_id) && | |
878 | els_op == ELS_LS_ACC && is_valid_ether_addr(granted_mac)) | |
97c8389d | 879 | fip->flogi_oxid = FC_XID_UNKNOWN; |
97c8389d JE |
880 | |
881 | /* | |
882 | * Convert skb into an fc_frame containing only the ELS. | |
883 | */ | |
884 | skb_pull(skb, (u8 *)fh - skb->data); | |
885 | skb_trim(skb, els_len); | |
886 | fp = (struct fc_frame *)skb; | |
887 | fc_frame_init(fp); | |
888 | fr_sof(fp) = FC_SOF_I3; | |
889 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 890 | fr_dev(fp) = lport; |
97c8389d | 891 | |
70b51aab | 892 | stats = fc_lport_get_stats(lport); |
97c8389d JE |
893 | stats->RxFrames++; |
894 | stats->RxWords += skb->len / FIP_BPW; | |
895 | ||
70b51aab | 896 | fc_exch_recv(lport, fp); |
97c8389d JE |
897 | return; |
898 | ||
899 | len_err: | |
0f51c2e5 | 900 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 901 | desc->fip_dtype, dlen); |
97c8389d JE |
902 | drop: |
903 | kfree_skb(skb); | |
904 | } | |
905 | ||
906 | /** | |
70b51aab RL |
907 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
908 | * @fip: The FCoE controller that received the frame | |
909 | * @fh: The received FIP header | |
97c8389d JE |
910 | * |
911 | * There may be multiple VN_Port descriptors. | |
912 | * The overall length has already been checked. | |
913 | */ | |
914 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 915 | struct fip_header *fh) |
97c8389d JE |
916 | { |
917 | struct fip_desc *desc; | |
918 | struct fip_mac_desc *mp; | |
919 | struct fip_wwn_desc *wp; | |
920 | struct fip_vn_desc *vp; | |
921 | size_t rlen; | |
922 | size_t dlen; | |
923 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 924 | struct fc_lport *lport = fip->lp; |
97c8389d JE |
925 | u32 desc_mask; |
926 | ||
0f51c2e5 | 927 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
97c8389d JE |
928 | if (!fcf) |
929 | return; | |
70b51aab | 930 | if (!fcf || !fc_host_port_id(lport->host)) |
97c8389d JE |
931 | return; |
932 | ||
933 | /* | |
934 | * mask of required descriptors. Validating each one clears its bit. | |
935 | */ | |
936 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
937 | ||
938 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
939 | desc = (struct fip_desc *)(fh + 1); | |
940 | while (rlen >= sizeof(*desc)) { | |
941 | dlen = desc->fip_dlen * FIP_BPW; | |
942 | if (dlen > rlen) | |
943 | return; | |
944 | switch (desc->fip_dtype) { | |
945 | case FIP_DT_MAC: | |
946 | mp = (struct fip_mac_desc *)desc; | |
947 | if (dlen < sizeof(*mp)) | |
948 | return; | |
949 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
950 | return; | |
951 | desc_mask &= ~BIT(FIP_DT_MAC); | |
952 | break; | |
953 | case FIP_DT_NAME: | |
954 | wp = (struct fip_wwn_desc *)desc; | |
955 | if (dlen < sizeof(*wp)) | |
956 | return; | |
957 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
958 | return; | |
959 | desc_mask &= ~BIT(FIP_DT_NAME); | |
960 | break; | |
961 | case FIP_DT_VN_ID: | |
962 | vp = (struct fip_vn_desc *)desc; | |
963 | if (dlen < sizeof(*vp)) | |
964 | return; | |
965 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
966 | fip->get_src_addr(lport)) == 0 && |
967 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
968 | ntoh24(vp->fd_fc_id) == | |
969 | fc_host_port_id(lport->host)) | |
97c8389d JE |
970 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
971 | break; | |
972 | default: | |
973 | /* standard says ignore unknown descriptors >= 128 */ | |
974 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
975 | return; | |
976 | break; | |
977 | } | |
978 | desc = (struct fip_desc *)((char *)desc + dlen); | |
979 | rlen -= dlen; | |
980 | } | |
981 | ||
982 | /* | |
983 | * reset only if all required descriptors were present and valid. | |
984 | */ | |
985 | if (desc_mask) { | |
0f51c2e5 JE |
986 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
987 | desc_mask); | |
97c8389d | 988 | } else { |
0f51c2e5 | 989 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 JE |
990 | |
991 | spin_lock_bh(&fip->lock); | |
992 | fcoe_ctlr_reset(fip); | |
993 | spin_unlock_bh(&fip->lock); | |
994 | ||
995 | fc_lport_reset(fip->lp); | |
996 | fcoe_ctlr_solicit(fip, NULL); | |
97c8389d JE |
997 | } |
998 | } | |
999 | ||
1000 | /** | |
70b51aab RL |
1001 | * fcoe_ctlr_recv() - Receive a FIP packet |
1002 | * @fip: The FCoE controller that received the packet | |
1003 | * @skb: The received FIP packet | |
97c8389d | 1004 | * |
1f4aed81 | 1005 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1006 | */ |
1007 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1008 | { | |
1f4aed81 | 1009 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1010 | schedule_work(&fip->recv_work); |
1011 | } | |
1012 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1013 | ||
1014 | /** | |
70b51aab RL |
1015 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1016 | * @fip: The FCoE controller that received the frame | |
1017 | * @skb: The received FIP frame | |
97c8389d JE |
1018 | * |
1019 | * Returns non-zero if the frame is dropped. | |
1020 | */ | |
1021 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1022 | { | |
1023 | struct fip_header *fiph; | |
1024 | struct ethhdr *eh; | |
1025 | enum fip_state state; | |
1026 | u16 op; | |
1027 | u8 sub; | |
1028 | ||
1029 | if (skb_linearize(skb)) | |
1030 | goto drop; | |
1031 | if (skb->len < sizeof(*fiph)) | |
1032 | goto drop; | |
1033 | eh = eth_hdr(skb); | |
1034 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1035 | compare_ether_addr(eh->h_dest, FIP_ALL_ENODE_MACS)) | |
1036 | goto drop; | |
1037 | fiph = (struct fip_header *)skb->data; | |
1038 | op = ntohs(fiph->fip_op); | |
1039 | sub = fiph->fip_subcode; | |
1040 | ||
97c8389d JE |
1041 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1042 | goto drop; | |
1043 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1044 | goto drop; | |
1045 | ||
1046 | spin_lock_bh(&fip->lock); | |
1047 | state = fip->state; | |
1048 | if (state == FIP_ST_AUTO) { | |
1049 | fip->map_dest = 0; | |
1050 | fip->state = FIP_ST_ENABLED; | |
1051 | state = FIP_ST_ENABLED; | |
0f51c2e5 | 1052 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d JE |
1053 | } |
1054 | spin_unlock_bh(&fip->lock); | |
1055 | if (state != FIP_ST_ENABLED) | |
1056 | goto drop; | |
1057 | ||
1058 | if (op == FIP_OP_LS) { | |
1059 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1060 | return 0; | |
1061 | } | |
1062 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) | |
1063 | fcoe_ctlr_recv_adv(fip, skb); | |
1064 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1065 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1066 | kfree_skb(skb); | |
1067 | return 0; | |
1068 | drop: | |
1069 | kfree_skb(skb); | |
1070 | return -1; | |
1071 | } | |
1072 | ||
1073 | /** | |
70b51aab RL |
1074 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1075 | * @fip: The FCoE controller | |
97c8389d JE |
1076 | * |
1077 | * If there are conflicting advertisements, no FCF can be chosen. | |
1078 | * | |
1079 | * Called with lock held. | |
1080 | */ | |
1081 | static void fcoe_ctlr_select(struct fcoe_ctlr *fip) | |
1082 | { | |
1083 | struct fcoe_fcf *fcf; | |
1084 | struct fcoe_fcf *best = NULL; | |
1085 | ||
1086 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
0f51c2e5 | 1087 | LIBFCOE_FIP_DBG(fip, "consider FCF for fab %llx VFID %d map %x " |
650bd12b RL |
1088 | "val %d\n", fcf->fabric_name, fcf->vfid, |
1089 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf)); | |
97c8389d | 1090 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
0f51c2e5 | 1091 | LIBFCOE_FIP_DBG(fip, "FCF for fab %llx map %x %svalid " |
650bd12b RL |
1092 | "%savailable\n", fcf->fabric_name, |
1093 | fcf->fc_map, (fcf->flags & FIP_FL_SOL) | |
1094 | ? "" : "in", (fcf->flags & FIP_FL_AVAIL) | |
1095 | ? "" : "un"); | |
97c8389d JE |
1096 | continue; |
1097 | } | |
1098 | if (!best) { | |
1099 | best = fcf; | |
1100 | continue; | |
1101 | } | |
1102 | if (fcf->fabric_name != best->fabric_name || | |
1103 | fcf->vfid != best->vfid || | |
1104 | fcf->fc_map != best->fc_map) { | |
0f51c2e5 | 1105 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " |
650bd12b | 1106 | "or FC-MAP\n"); |
97c8389d JE |
1107 | return; |
1108 | } | |
1109 | if (fcf->pri < best->pri) | |
1110 | best = fcf; | |
1111 | } | |
1112 | fip->sel_fcf = best; | |
1113 | } | |
1114 | ||
1115 | /** | |
70b51aab RL |
1116 | * fcoe_ctlr_timeout() - FIP timeout handler |
1117 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1118 | * |
1119 | * Ages FCFs. Triggers FCF selection if possible. Sends keep-alives. | |
1120 | */ | |
1121 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1122 | { | |
1123 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
1124 | struct fcoe_fcf *sel; | |
1125 | struct fcoe_fcf *fcf; | |
1126 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
97c8389d JE |
1127 | |
1128 | spin_lock_bh(&fip->lock); | |
1129 | if (fip->state == FIP_ST_DISABLED) { | |
1130 | spin_unlock_bh(&fip->lock); | |
1131 | return; | |
1132 | } | |
1133 | ||
1134 | fcf = fip->sel_fcf; | |
1135 | fcoe_ctlr_age_fcfs(fip); | |
1136 | ||
1137 | sel = fip->sel_fcf; | |
1138 | if (!sel && fip->sel_time && time_after_eq(jiffies, fip->sel_time)) { | |
1139 | fcoe_ctlr_select(fip); | |
1140 | sel = fip->sel_fcf; | |
1141 | fip->sel_time = 0; | |
1142 | } | |
1143 | ||
1144 | if (sel != fcf) { | |
1145 | fcf = sel; /* the old FCF may have been freed */ | |
1146 | if (sel) { | |
650bd12b | 1147 | printk(KERN_INFO "libfcoe: host%d: FIP selected " |
66d6faec JB |
1148 | "Fibre-Channel Forwarder MAC %pM\n", |
1149 | fip->lp->host->host_no, sel->fcf_mac); | |
97c8389d JE |
1150 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); |
1151 | fip->port_ka_time = jiffies + | |
70b51aab | 1152 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
97c8389d | 1153 | fip->ctlr_ka_time = jiffies + sel->fka_period; |
97c8389d | 1154 | } else { |
650bd12b | 1155 | printk(KERN_NOTICE "libfcoe: host%d: " |
70b51aab | 1156 | "FIP Fibre-Channel Forwarder timed out. " |
97c8389d JE |
1157 | "Starting FCF discovery.\n", |
1158 | fip->lp->host->host_no); | |
dd42dac4 JE |
1159 | fip->reset_req = 1; |
1160 | schedule_work(&fip->link_work); | |
97c8389d | 1161 | } |
97c8389d JE |
1162 | } |
1163 | ||
97c8389d JE |
1164 | if (sel) { |
1165 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { | |
1166 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
11b56188 | 1167 | fip->send_ctlr_ka = 1; |
97c8389d JE |
1168 | } |
1169 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1170 | next_timer = fip->ctlr_ka_time; | |
1171 | ||
1172 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
1173 | fip->port_ka_time += jiffies + | |
70b51aab | 1174 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
11b56188 | 1175 | fip->send_port_ka = 1; |
97c8389d JE |
1176 | } |
1177 | if (time_after(next_timer, fip->port_ka_time)) | |
1178 | next_timer = fip->port_ka_time; | |
1179 | mod_timer(&fip->timer, next_timer); | |
1180 | } else if (fip->sel_time) { | |
1181 | next_timer = fip->sel_time + | |
70b51aab | 1182 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
1183 | mod_timer(&fip->timer, next_timer); |
1184 | } | |
11b56188 CL |
1185 | if (fip->send_ctlr_ka || fip->send_port_ka) |
1186 | schedule_work(&fip->link_work); | |
97c8389d | 1187 | spin_unlock_bh(&fip->lock); |
97c8389d JE |
1188 | } |
1189 | ||
1190 | /** | |
70b51aab RL |
1191 | * fcoe_ctlr_link_work() - Worker thread function for link changes |
1192 | * @work: Handle to a FCoE controller | |
97c8389d JE |
1193 | * |
1194 | * See if the link status has changed and if so, report it. | |
1195 | * | |
1196 | * This is here because fc_linkup() and fc_linkdown() must not | |
1197 | * be called from the timer directly, since they use a mutex. | |
1198 | */ | |
1199 | static void fcoe_ctlr_link_work(struct work_struct *work) | |
1200 | { | |
1201 | struct fcoe_ctlr *fip; | |
11b56188 CL |
1202 | struct fc_lport *vport; |
1203 | u8 *mac; | |
97c8389d JE |
1204 | int link; |
1205 | int last_link; | |
dd42dac4 | 1206 | int reset; |
97c8389d JE |
1207 | |
1208 | fip = container_of(work, struct fcoe_ctlr, link_work); | |
1209 | spin_lock_bh(&fip->lock); | |
1210 | last_link = fip->last_link; | |
1211 | link = fip->link; | |
1212 | fip->last_link = link; | |
dd42dac4 JE |
1213 | reset = fip->reset_req; |
1214 | fip->reset_req = 0; | |
97c8389d JE |
1215 | spin_unlock_bh(&fip->lock); |
1216 | ||
1217 | if (last_link != link) { | |
1218 | if (link) | |
1219 | fc_linkup(fip->lp); | |
1220 | else | |
dd42dac4 JE |
1221 | fc_linkdown(fip->lp); |
1222 | } else if (reset && link) | |
1223 | fc_lport_reset(fip->lp); | |
11b56188 CL |
1224 | |
1225 | if (fip->send_ctlr_ka) { | |
1226 | fip->send_ctlr_ka = 0; | |
1227 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); | |
1228 | } | |
1229 | if (fip->send_port_ka) { | |
1230 | fip->send_port_ka = 0; | |
1231 | mutex_lock(&fip->lp->lp_mutex); | |
1232 | mac = fip->get_src_addr(fip->lp); | |
1233 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1234 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1235 | mac = fip->get_src_addr(vport); | |
1236 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1237 | } | |
1238 | mutex_unlock(&fip->lp->lp_mutex); | |
1239 | } | |
97c8389d JE |
1240 | } |
1241 | ||
1242 | /** | |
70b51aab RL |
1243 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1244 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1245 | */ |
1246 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1247 | { | |
1248 | struct fcoe_ctlr *fip; | |
1249 | struct sk_buff *skb; | |
1250 | ||
1251 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1252 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1253 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1254 | } |
1255 | ||
1256 | /** | |
70b51aab RL |
1257 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response or request |
1258 | * @fip: The FCoE controller | |
1259 | * @fp: The FC frame to snoop | |
1260 | * @sa: Ethernet source MAC address from received FCoE frame | |
97c8389d JE |
1261 | * |
1262 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1263 | * | |
1264 | * The caller has checked that we are waiting for login as indicated | |
1265 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1266 | * | |
1267 | * The caller is responsible for freeing the frame. | |
1268 | * | |
1269 | * Return non-zero if the frame should not be delivered to libfc. | |
1270 | */ | |
11b56188 CL |
1271 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
1272 | struct fc_frame *fp, u8 *sa) | |
97c8389d JE |
1273 | { |
1274 | struct fc_frame_header *fh; | |
1275 | u8 op; | |
1276 | u8 mac[ETH_ALEN]; | |
1277 | ||
1278 | fh = fc_frame_header_get(fp); | |
1279 | if (fh->fh_type != FC_TYPE_ELS) | |
1280 | return 0; | |
1281 | ||
1282 | op = fc_frame_payload_op(fp); | |
1283 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1284 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1285 | ||
1286 | spin_lock_bh(&fip->lock); | |
1287 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { | |
1288 | spin_unlock_bh(&fip->lock); | |
1289 | return -EINVAL; | |
1290 | } | |
1291 | fip->state = FIP_ST_NON_FIP; | |
0f51c2e5 JE |
1292 | LIBFCOE_FIP_DBG(fip, |
1293 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1294 | |
1295 | /* | |
1296 | * FLOGI accepted. | |
1297 | * If the src mac addr is FC_OUI-based, then we mark the | |
1298 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1299 | * Otherwise we use the FCoE gateway addr | |
1300 | */ | |
1301 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
1302 | fip->map_dest = 1; | |
1303 | } else { | |
1304 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1305 | fip->map_dest = 0; | |
1306 | } | |
1307 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
11b56188 CL |
1308 | fc_fcoe_set_mac(mac, fh->fh_d_id); |
1309 | fip->update_mac(lport, mac); | |
97c8389d | 1310 | spin_unlock_bh(&fip->lock); |
97c8389d JE |
1311 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1312 | /* | |
1313 | * Save source MAC for point-to-point responses. | |
1314 | */ | |
1315 | spin_lock_bh(&fip->lock); | |
1316 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { | |
1317 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1318 | fip->map_dest = 0; | |
1319 | if (fip->state == FIP_ST_NON_FIP) | |
0f51c2e5 | 1320 | LIBFCOE_FIP_DBG(fip, "received FLOGI REQ, " |
97c8389d JE |
1321 | "using non-FIP mode\n"); |
1322 | fip->state = FIP_ST_NON_FIP; | |
1323 | } | |
1324 | spin_unlock_bh(&fip->lock); | |
1325 | } | |
1326 | return 0; | |
1327 | } | |
1328 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1329 | ||
5e80f7f7 | 1330 | /** |
70b51aab RL |
1331 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1332 | * @mac: The MAC address to convert | |
1333 | * @scheme: The scheme to use when converting | |
1334 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1335 | * |
1336 | * Returns: u64 fc world wide name | |
1337 | */ | |
1338 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1339 | unsigned int scheme, unsigned int port) | |
1340 | { | |
1341 | u64 wwn; | |
1342 | u64 host_mac; | |
1343 | ||
1344 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1345 | host_mac = ((u64) mac[0] << 40) | | |
1346 | ((u64) mac[1] << 32) | | |
1347 | ((u64) mac[2] << 24) | | |
1348 | ((u64) mac[3] << 16) | | |
1349 | ((u64) mac[4] << 8) | | |
1350 | (u64) mac[5]; | |
1351 | ||
1352 | WARN_ON(host_mac >= (1ULL << 48)); | |
1353 | wwn = host_mac | ((u64) scheme << 60); | |
1354 | switch (scheme) { | |
1355 | case 1: | |
1356 | WARN_ON(port != 0); | |
1357 | break; | |
1358 | case 2: | |
1359 | WARN_ON(port >= 0xfff); | |
1360 | wwn |= (u64) port << 48; | |
1361 | break; | |
1362 | default: | |
1363 | WARN_ON(1); | |
1364 | break; | |
1365 | } | |
1366 | ||
1367 | return wwn; | |
1368 | } | |
1369 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1370 | ||
1371 | /** | |
70b51aab RL |
1372 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
1373 | * @lp: The local port to configure libfc for | |
1374 | * @tt: The libfc function template | |
5e80f7f7 VD |
1375 | * |
1376 | * Returns : 0 for success | |
1377 | */ | |
70b51aab RL |
1378 | int fcoe_libfc_config(struct fc_lport *lport, |
1379 | struct libfc_function_template *tt) | |
5e80f7f7 VD |
1380 | { |
1381 | /* Set the function pointers set by the LLDD */ | |
70b51aab RL |
1382 | memcpy(&lport->tt, tt, sizeof(*tt)); |
1383 | if (fc_fcp_init(lport)) | |
5e80f7f7 | 1384 | return -ENOMEM; |
70b51aab RL |
1385 | fc_exch_init(lport); |
1386 | fc_elsct_init(lport); | |
1387 | fc_lport_init(lport); | |
1388 | fc_rport_init(lport); | |
1389 | fc_disc_init(lport); | |
5e80f7f7 VD |
1390 | |
1391 | return 0; | |
1392 | } | |
1393 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); | |
11b56188 | 1394 |