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