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Commit | Line | Data |
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9b34ecff | 1 | /* |
97c8389d JE |
2 | * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved. |
3 | * Copyright (c) 2009 Intel Corporation. All rights reserved. | |
9b34ecff VD |
4 | * |
5 | * This program is free software; you can redistribute it and/or modify it | |
6 | * under the terms and conditions of the GNU General Public License, | |
7 | * version 2, as published by the Free Software Foundation. | |
8 | * | |
9 | * This program is distributed in the hope it will be useful, but WITHOUT | |
10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
12 | * more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along with | |
15 | * this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA. | |
17 | * | |
18 | * Maintained at www.Open-FCoE.org | |
19 | */ | |
20 | ||
97c8389d | 21 | #include <linux/types.h> |
9b34ecff | 22 | #include <linux/module.h> |
97c8389d JE |
23 | #include <linux/kernel.h> |
24 | #include <linux/list.h> | |
25 | #include <linux/spinlock.h> | |
26 | #include <linux/timer.h> | |
5e80f7f7 | 27 | #include <linux/netdevice.h> |
97c8389d JE |
28 | #include <linux/etherdevice.h> |
29 | #include <linux/ethtool.h> | |
30 | #include <linux/if_ether.h> | |
31 | #include <linux/if_vlan.h> | |
97c8389d JE |
32 | #include <linux/errno.h> |
33 | #include <linux/bitops.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
97c8389d JE |
35 | #include <net/rtnetlink.h> |
36 | ||
37 | #include <scsi/fc/fc_els.h> | |
38 | #include <scsi/fc/fc_fs.h> | |
39 | #include <scsi/fc/fc_fip.h> | |
40 | #include <scsi/fc/fc_encaps.h> | |
41 | #include <scsi/fc/fc_fcoe.h> | |
e10f8c66 | 42 | #include <scsi/fc/fc_fcp.h> |
5e80f7f7 VD |
43 | |
44 | #include <scsi/libfc.h> | |
97c8389d | 45 | #include <scsi/libfcoe.h> |
9b34ecff | 46 | |
21b7b2f5 YZ |
47 | #include "libfcoe.h" |
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); | |
42913657 | 53 | static void fcoe_ctlr_timer_work(struct work_struct *); |
97c8389d | 54 | static void fcoe_ctlr_recv_work(struct work_struct *); |
794d98e7 | 55 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *); |
97c8389d | 56 | |
e10f8c66 JE |
57 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *); |
58 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *); | |
59 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *); | |
60 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *); | |
61 | ||
97c8389d | 62 | static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS; |
e10f8c66 JE |
63 | static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS; |
64 | static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS; | |
65 | static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS; | |
97c8389d | 66 | |
0095a921 | 67 | static const char * const fcoe_ctlr_states[] = { |
9b651da9 JE |
68 | [FIP_ST_DISABLED] = "DISABLED", |
69 | [FIP_ST_LINK_WAIT] = "LINK_WAIT", | |
70 | [FIP_ST_AUTO] = "AUTO", | |
71 | [FIP_ST_NON_FIP] = "NON_FIP", | |
72 | [FIP_ST_ENABLED] = "ENABLED", | |
e10f8c66 JE |
73 | [FIP_ST_VNMP_START] = "VNMP_START", |
74 | [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1", | |
75 | [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2", | |
76 | [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM", | |
77 | [FIP_ST_VNMP_UP] = "VNMP_UP", | |
9b651da9 JE |
78 | }; |
79 | ||
80 | static const char *fcoe_ctlr_state(enum fip_state state) | |
81 | { | |
82 | const char *cp = "unknown"; | |
83 | ||
84 | if (state < ARRAY_SIZE(fcoe_ctlr_states)) | |
85 | cp = fcoe_ctlr_states[state]; | |
86 | if (!cp) | |
87 | cp = "unknown"; | |
88 | return cp; | |
89 | } | |
90 | ||
91 | /** | |
92 | * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state. | |
93 | * @fip: The FCoE controller | |
94 | * @state: The new state | |
95 | */ | |
96 | static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state) | |
97 | { | |
98 | if (state == fip->state) | |
99 | return; | |
100 | if (fip->lp) | |
101 | LIBFCOE_FIP_DBG(fip, "state %s -> %s\n", | |
102 | fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state)); | |
103 | fip->state = state; | |
104 | } | |
105 | ||
70b51aab RL |
106 | /** |
107 | * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid | |
108 | * @fcf: The FCF to check | |
109 | * | |
97c8389d JE |
110 | * Return non-zero if FCF fcoe_size has been validated. |
111 | */ | |
112 | static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf) | |
113 | { | |
114 | return (fcf->flags & FIP_FL_SOL) != 0; | |
115 | } | |
116 | ||
70b51aab RL |
117 | /** |
118 | * fcoe_ctlr_fcf_usable() - Check if a FCF is usable | |
119 | * @fcf: The FCF to check | |
120 | * | |
97c8389d JE |
121 | * Return non-zero if the FCF is usable. |
122 | */ | |
123 | static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf) | |
124 | { | |
125 | u16 flags = FIP_FL_SOL | FIP_FL_AVAIL; | |
126 | ||
127 | return (fcf->flags & flags) == flags; | |
128 | } | |
129 | ||
cd229e42 JE |
130 | /** |
131 | * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses | |
132 | * @fip: The FCoE controller | |
133 | */ | |
134 | static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip) | |
135 | { | |
136 | if (fip->mode == FIP_MODE_VN2VN) | |
137 | hton24(fip->dest_addr, FIP_VN_FC_MAP); | |
138 | else | |
139 | hton24(fip->dest_addr, FIP_DEF_FC_MAP); | |
140 | hton24(fip->dest_addr + 3, 0); | |
141 | fip->map_dest = 1; | |
142 | } | |
143 | ||
97c8389d | 144 | /** |
70b51aab RL |
145 | * fcoe_ctlr_init() - Initialize the FCoE Controller instance |
146 | * @fip: The FCoE controller to initialize | |
97c8389d | 147 | */ |
3d902ac0 | 148 | void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode) |
97c8389d | 149 | { |
9b651da9 | 150 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
3d902ac0 | 151 | fip->mode = mode; |
97c8389d | 152 | INIT_LIST_HEAD(&fip->fcfs); |
fdb068c6 | 153 | mutex_init(&fip->ctlr_mutex); |
794d98e7 | 154 | spin_lock_init(&fip->ctlr_lock); |
97c8389d JE |
155 | fip->flogi_oxid = FC_XID_UNKNOWN; |
156 | setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip); | |
42913657 | 157 | INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work); |
97c8389d JE |
158 | INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work); |
159 | skb_queue_head_init(&fip->fip_recv_list); | |
160 | } | |
161 | EXPORT_SYMBOL(fcoe_ctlr_init); | |
162 | ||
163 | /** | |
70b51aab RL |
164 | * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller |
165 | * @fip: The FCoE controller whose FCFs are to be reset | |
97c8389d JE |
166 | * |
167 | * Called with &fcoe_ctlr lock held. | |
168 | */ | |
169 | static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip) | |
170 | { | |
171 | struct fcoe_fcf *fcf; | |
172 | struct fcoe_fcf *next; | |
173 | ||
174 | fip->sel_fcf = NULL; | |
175 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { | |
176 | list_del(&fcf->list); | |
177 | kfree(fcf); | |
178 | } | |
179 | fip->fcf_count = 0; | |
180 | fip->sel_time = 0; | |
181 | } | |
182 | ||
183 | /** | |
70b51aab RL |
184 | * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller |
185 | * @fip: The FCoE controller to tear down | |
97c8389d JE |
186 | * |
187 | * This is called by FCoE drivers before freeing the &fcoe_ctlr. | |
188 | * | |
189 | * The receive handler will have been deleted before this to guarantee | |
190 | * that no more recv_work will be scheduled. | |
191 | * | |
192 | * The timer routine will simply return once we set FIP_ST_DISABLED. | |
193 | * This guarantees that no further timeouts or work will be scheduled. | |
194 | */ | |
195 | void fcoe_ctlr_destroy(struct fcoe_ctlr *fip) | |
196 | { | |
a4b7cfae | 197 | cancel_work_sync(&fip->recv_work); |
1f4aed81 | 198 | skb_queue_purge(&fip->fip_recv_list); |
a4b7cfae | 199 | |
fdb068c6 | 200 | mutex_lock(&fip->ctlr_mutex); |
9b651da9 | 201 | fcoe_ctlr_set_state(fip, FIP_ST_DISABLED); |
97c8389d | 202 | fcoe_ctlr_reset_fcfs(fip); |
fdb068c6 | 203 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 204 | del_timer_sync(&fip->timer); |
42913657 | 205 | cancel_work_sync(&fip->timer_work); |
97c8389d JE |
206 | } |
207 | EXPORT_SYMBOL(fcoe_ctlr_destroy); | |
208 | ||
69316ee2 | 209 | /** |
794d98e7 | 210 | * fcoe_ctlr_announce() - announce new FCF selection |
69316ee2 JE |
211 | * @fip: The FCoE controller |
212 | * | |
213 | * Also sets the destination MAC for FCoE and control packets | |
794d98e7 JE |
214 | * |
215 | * Called with neither ctlr_mutex nor ctlr_lock held. | |
69316ee2 JE |
216 | */ |
217 | static void fcoe_ctlr_announce(struct fcoe_ctlr *fip) | |
218 | { | |
794d98e7 JE |
219 | struct fcoe_fcf *sel; |
220 | struct fcoe_fcf *fcf; | |
221 | ||
222 | mutex_lock(&fip->ctlr_mutex); | |
223 | spin_lock_bh(&fip->ctlr_lock); | |
224 | ||
225 | kfree_skb(fip->flogi_req); | |
226 | fip->flogi_req = NULL; | |
227 | list_for_each_entry(fcf, &fip->fcfs, list) | |
228 | fcf->flogi_sent = 0; | |
229 | ||
230 | spin_unlock_bh(&fip->ctlr_lock); | |
231 | sel = fip->sel_fcf; | |
69316ee2 JE |
232 | |
233 | if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr)) | |
794d98e7 | 234 | goto unlock; |
69316ee2 JE |
235 | if (!is_zero_ether_addr(fip->dest_addr)) { |
236 | printk(KERN_NOTICE "libfcoe: host%d: " | |
237 | "FIP Fibre-Channel Forwarder MAC %pM deselected\n", | |
238 | fip->lp->host->host_no, fip->dest_addr); | |
239 | memset(fip->dest_addr, 0, ETH_ALEN); | |
240 | } | |
241 | if (sel) { | |
242 | printk(KERN_INFO "libfcoe: host%d: FIP selected " | |
243 | "Fibre-Channel Forwarder MAC %pM\n", | |
244 | fip->lp->host->host_no, sel->fcf_mac); | |
245 | memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN); | |
246 | fip->map_dest = 0; | |
247 | } | |
794d98e7 JE |
248 | unlock: |
249 | mutex_unlock(&fip->ctlr_mutex); | |
69316ee2 JE |
250 | } |
251 | ||
97c8389d | 252 | /** |
70b51aab RL |
253 | * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port |
254 | * @fip: The FCoE controller to get the maximum FCoE size from | |
97c8389d JE |
255 | * |
256 | * Returns the maximum packet size including the FCoE header and trailer, | |
257 | * but not including any Ethernet or VLAN headers. | |
258 | */ | |
259 | static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip) | |
260 | { | |
261 | /* | |
262 | * Determine the max FCoE frame size allowed, including | |
263 | * FCoE header and trailer. | |
264 | * Note: lp->mfs is currently the payload size, not the frame size. | |
265 | */ | |
266 | return fip->lp->mfs + sizeof(struct fc_frame_header) + | |
267 | sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof); | |
268 | } | |
269 | ||
270 | /** | |
70b51aab RL |
271 | * fcoe_ctlr_solicit() - Send a FIP solicitation |
272 | * @fip: The FCoE controller to send the solicitation on | |
273 | * @fcf: The destination FCF (if NULL, a multicast solicitation is sent) | |
97c8389d JE |
274 | */ |
275 | static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf) | |
276 | { | |
277 | struct sk_buff *skb; | |
278 | struct fip_sol { | |
279 | struct ethhdr eth; | |
280 | struct fip_header fip; | |
281 | struct { | |
282 | struct fip_mac_desc mac; | |
283 | struct fip_wwn_desc wwnn; | |
284 | struct fip_size_desc size; | |
0095a921 YZ |
285 | } __packed desc; |
286 | } __packed * sol; | |
97c8389d JE |
287 | u32 fcoe_size; |
288 | ||
289 | skb = dev_alloc_skb(sizeof(*sol)); | |
290 | if (!skb) | |
291 | return; | |
292 | ||
293 | sol = (struct fip_sol *)skb->data; | |
294 | ||
295 | memset(sol, 0, sizeof(*sol)); | |
296 | memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN); | |
297 | memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
298 | sol->eth.h_proto = htons(ETH_P_FIP); | |
299 | ||
300 | sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
301 | sol->fip.fip_op = htons(FIP_OP_DISC); | |
302 | sol->fip.fip_subcode = FIP_SC_SOL; | |
303 | sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW); | |
304 | sol->fip.fip_flags = htons(FIP_FL_FPMA); | |
184dd345 VD |
305 | if (fip->spma) |
306 | sol->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
307 | |
308 | sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
309 | sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW; | |
310 | memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
311 | ||
312 | sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
313 | sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW; | |
314 | put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn); | |
315 | ||
316 | fcoe_size = fcoe_ctlr_fcoe_size(fip); | |
317 | sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
318 | sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW; | |
319 | sol->desc.size.fd_size = htons(fcoe_size); | |
320 | ||
321 | skb_put(skb, sizeof(*sol)); | |
0f491539 | 322 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
323 | skb_reset_mac_header(skb); |
324 | skb_reset_network_header(skb); | |
325 | fip->send(fip, skb); | |
326 | ||
327 | if (!fcf) | |
328 | fip->sol_time = jiffies; | |
329 | } | |
330 | ||
331 | /** | |
70b51aab RL |
332 | * fcoe_ctlr_link_up() - Start FCoE controller |
333 | * @fip: The FCoE controller to start | |
97c8389d JE |
334 | * |
335 | * Called from the LLD when the network link is ready. | |
336 | */ | |
337 | void fcoe_ctlr_link_up(struct fcoe_ctlr *fip) | |
338 | { | |
fdb068c6 | 339 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 340 | if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) { |
fdb068c6 | 341 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
342 | fc_linkup(fip->lp); |
343 | } else if (fip->state == FIP_ST_LINK_WAIT) { | |
9b651da9 | 344 | fcoe_ctlr_set_state(fip, fip->mode); |
e10f8c66 JE |
345 | switch (fip->mode) { |
346 | default: | |
347 | LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode); | |
348 | /* fall-through */ | |
349 | case FIP_MODE_AUTO: | |
0f51c2e5 | 350 | LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n"); |
e10f8c66 JE |
351 | /* fall-through */ |
352 | case FIP_MODE_FABRIC: | |
353 | case FIP_MODE_NON_FIP: | |
354 | mutex_unlock(&fip->ctlr_mutex); | |
355 | fc_linkup(fip->lp); | |
356 | fcoe_ctlr_solicit(fip, NULL); | |
357 | break; | |
358 | case FIP_MODE_VN2VN: | |
359 | fcoe_ctlr_vn_start(fip); | |
360 | mutex_unlock(&fip->ctlr_mutex); | |
361 | fc_linkup(fip->lp); | |
362 | break; | |
363 | } | |
97c8389d | 364 | } else |
fdb068c6 | 365 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
366 | } |
367 | EXPORT_SYMBOL(fcoe_ctlr_link_up); | |
368 | ||
369 | /** | |
70b51aab RL |
370 | * fcoe_ctlr_reset() - Reset a FCoE controller |
371 | * @fip: The FCoE controller to reset | |
97c8389d | 372 | */ |
dd42dac4 | 373 | static void fcoe_ctlr_reset(struct fcoe_ctlr *fip) |
97c8389d | 374 | { |
97c8389d JE |
375 | fcoe_ctlr_reset_fcfs(fip); |
376 | del_timer(&fip->timer); | |
97c8389d JE |
377 | fip->ctlr_ka_time = 0; |
378 | fip->port_ka_time = 0; | |
379 | fip->sol_time = 0; | |
380 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
cd229e42 | 381 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
382 | } |
383 | ||
384 | /** | |
70b51aab RL |
385 | * fcoe_ctlr_link_down() - Stop a FCoE controller |
386 | * @fip: The FCoE controller to be stopped | |
97c8389d JE |
387 | * |
388 | * Returns non-zero if the link was up and now isn't. | |
389 | * | |
390 | * Called from the LLD when the network link is not ready. | |
391 | * There may be multiple calls while the link is down. | |
392 | */ | |
393 | int fcoe_ctlr_link_down(struct fcoe_ctlr *fip) | |
394 | { | |
dd42dac4 JE |
395 | int link_dropped; |
396 | ||
397 | LIBFCOE_FIP_DBG(fip, "link down.\n"); | |
fdb068c6 | 398 | mutex_lock(&fip->ctlr_mutex); |
dd42dac4 | 399 | fcoe_ctlr_reset(fip); |
42913657 | 400 | link_dropped = fip->state != FIP_ST_LINK_WAIT; |
9b651da9 | 401 | fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT); |
fdb068c6 | 402 | mutex_unlock(&fip->ctlr_mutex); |
dd42dac4 JE |
403 | |
404 | if (link_dropped) | |
405 | fc_linkdown(fip->lp); | |
406 | return link_dropped; | |
97c8389d JE |
407 | } |
408 | EXPORT_SYMBOL(fcoe_ctlr_link_down); | |
409 | ||
410 | /** | |
70b51aab RL |
411 | * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF |
412 | * @fip: The FCoE controller to send the FKA on | |
413 | * @lport: libfc fc_lport to send from | |
414 | * @ports: 0 for controller keep-alive, 1 for port keep-alive | |
415 | * @sa: The source MAC address | |
97c8389d JE |
416 | * |
417 | * A controller keep-alive is sent every fka_period (typically 8 seconds). | |
418 | * The source MAC is the native MAC address. | |
419 | * | |
420 | * A port keep-alive is sent every 90 seconds while logged in. | |
421 | * The source MAC is the assigned mapped source address. | |
422 | * The destination is the FCF's F-port. | |
423 | */ | |
11b56188 CL |
424 | static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip, |
425 | struct fc_lport *lport, | |
426 | int ports, u8 *sa) | |
97c8389d JE |
427 | { |
428 | struct sk_buff *skb; | |
429 | struct fip_kal { | |
430 | struct ethhdr eth; | |
431 | struct fip_header fip; | |
432 | struct fip_mac_desc mac; | |
0095a921 | 433 | } __packed * kal; |
97c8389d JE |
434 | struct fip_vn_desc *vn; |
435 | u32 len; | |
436 | struct fc_lport *lp; | |
437 | struct fcoe_fcf *fcf; | |
438 | ||
439 | fcf = fip->sel_fcf; | |
440 | lp = fip->lp; | |
281ae642 | 441 | if (!fcf || (ports && !lp->port_id)) |
97c8389d JE |
442 | return; |
443 | ||
be276cbe | 444 | len = sizeof(*kal) + ports * sizeof(*vn); |
97c8389d JE |
445 | skb = dev_alloc_skb(len); |
446 | if (!skb) | |
447 | return; | |
448 | ||
449 | kal = (struct fip_kal *)skb->data; | |
450 | memset(kal, 0, len); | |
451 | memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
452 | memcpy(kal->eth.h_source, sa, ETH_ALEN); | |
453 | kal->eth.h_proto = htons(ETH_P_FIP); | |
454 | ||
455 | kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
456 | kal->fip.fip_op = htons(FIP_OP_CTRL); | |
457 | kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE; | |
458 | kal->fip.fip_dl_len = htons((sizeof(kal->mac) + | |
70b51aab | 459 | ports * sizeof(*vn)) / FIP_BPW); |
97c8389d | 460 | kal->fip.fip_flags = htons(FIP_FL_FPMA); |
184dd345 VD |
461 | if (fip->spma) |
462 | kal->fip.fip_flags |= htons(FIP_FL_SPMA); | |
97c8389d JE |
463 | |
464 | kal->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
465 | kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW; | |
466 | memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
97c8389d JE |
467 | if (ports) { |
468 | vn = (struct fip_vn_desc *)(kal + 1); | |
469 | vn->fd_desc.fip_dtype = FIP_DT_VN_ID; | |
470 | vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW; | |
11b56188 | 471 | memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN); |
fb83153d KM |
472 | hton24(vn->fd_fc_id, lport->port_id); |
473 | put_unaligned_be64(lport->wwpn, &vn->fd_wwpn); | |
97c8389d | 474 | } |
97c8389d | 475 | skb_put(skb, len); |
0f491539 | 476 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
477 | skb_reset_mac_header(skb); |
478 | skb_reset_network_header(skb); | |
479 | fip->send(fip, skb); | |
480 | } | |
481 | ||
482 | /** | |
70b51aab RL |
483 | * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it |
484 | * @fip: The FCoE controller for the ELS frame | |
485 | * @dtype: The FIP descriptor type for the frame | |
486 | * @skb: The FCoE ELS frame including FC header but no FCoE headers | |
e10f8c66 | 487 | * @d_id: The destination port ID. |
97c8389d JE |
488 | * |
489 | * Returns non-zero error code on failure. | |
490 | * | |
491 | * The caller must check that the length is a multiple of 4. | |
492 | * | |
493 | * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes). | |
494 | * Headroom includes the FIP encapsulation description, FIP header, and | |
495 | * Ethernet header. The tailroom is for the FIP MAC descriptor. | |
496 | */ | |
11b56188 | 497 | static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport, |
e10f8c66 | 498 | u8 dtype, struct sk_buff *skb, u32 d_id) |
97c8389d JE |
499 | { |
500 | struct fip_encaps_head { | |
501 | struct ethhdr eth; | |
502 | struct fip_header fip; | |
503 | struct fip_encaps encaps; | |
0095a921 | 504 | } __packed * cap; |
5554345b | 505 | struct fc_frame_header *fh; |
97c8389d JE |
506 | struct fip_mac_desc *mac; |
507 | struct fcoe_fcf *fcf; | |
508 | size_t dlen; | |
5a84baea | 509 | u16 fip_flags; |
5554345b | 510 | u8 op; |
97c8389d | 511 | |
5554345b JE |
512 | fh = (struct fc_frame_header *)skb->data; |
513 | op = *(u8 *)(fh + 1); | |
97c8389d JE |
514 | dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */ |
515 | cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap)); | |
97c8389d | 516 | memset(cap, 0, sizeof(*cap)); |
e10f8c66 JE |
517 | |
518 | if (lport->point_to_multipoint) { | |
519 | if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest)) | |
520 | return -ENODEV; | |
5554345b | 521 | fip_flags = 0; |
e10f8c66 JE |
522 | } else { |
523 | fcf = fip->sel_fcf; | |
524 | if (!fcf) | |
525 | return -ENODEV; | |
526 | fip_flags = fcf->flags; | |
527 | fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA : | |
528 | FIP_FL_FPMA; | |
529 | if (!fip_flags) | |
530 | return -ENODEV; | |
531 | memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN); | |
532 | } | |
97c8389d JE |
533 | memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN); |
534 | cap->eth.h_proto = htons(ETH_P_FIP); | |
535 | ||
536 | cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
537 | cap->fip.fip_op = htons(FIP_OP_LS); | |
5554345b JE |
538 | if (op == ELS_LS_ACC || op == ELS_LS_RJT) |
539 | cap->fip.fip_subcode = FIP_SC_REP; | |
540 | else | |
541 | cap->fip.fip_subcode = FIP_SC_REQ; | |
5a84baea | 542 | cap->fip.fip_flags = htons(fip_flags); |
97c8389d JE |
543 | |
544 | cap->encaps.fd_desc.fip_dtype = dtype; | |
545 | cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW; | |
546 | ||
5554345b JE |
547 | if (op != ELS_LS_RJT) { |
548 | dlen += sizeof(*mac); | |
549 | mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac)); | |
550 | memset(mac, 0, sizeof(*mac)); | |
551 | mac->fd_desc.fip_dtype = FIP_DT_MAC; | |
552 | mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW; | |
553 | if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) { | |
554 | memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN); | |
555 | } else if (fip->mode == FIP_MODE_VN2VN) { | |
556 | hton24(mac->fd_mac, FIP_VN_FC_MAP); | |
557 | hton24(mac->fd_mac + 3, fip->port_id); | |
558 | } else if (fip_flags & FIP_FL_SPMA) { | |
559 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n"); | |
560 | memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
561 | } else { | |
562 | LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n"); | |
563 | /* FPMA only FLOGI. Must leave the MAC desc zeroed. */ | |
564 | } | |
593abc07 | 565 | } |
5554345b | 566 | cap->fip.fip_dl_len = htons(dlen / FIP_BPW); |
97c8389d | 567 | |
0f491539 | 568 | skb->protocol = htons(ETH_P_FIP); |
97c8389d JE |
569 | skb_reset_mac_header(skb); |
570 | skb_reset_network_header(skb); | |
571 | return 0; | |
572 | } | |
573 | ||
574 | /** | |
575 | * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate. | |
576 | * @fip: FCoE controller. | |
11b56188 | 577 | * @lport: libfc fc_lport to send from |
97c8389d JE |
578 | * @skb: FCoE ELS frame including FC header but no FCoE headers. |
579 | * | |
580 | * Returns a non-zero error code if the frame should not be sent. | |
581 | * Returns zero if the caller should send the frame with FCoE encapsulation. | |
582 | * | |
583 | * The caller must check that the length is a multiple of 4. | |
584 | * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes). | |
e10f8c66 | 585 | * The the skb must also be an fc_frame. |
794d98e7 JE |
586 | * |
587 | * This is called from the lower-level driver with spinlocks held, | |
588 | * so we must not take a mutex here. | |
97c8389d | 589 | */ |
11b56188 CL |
590 | int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport, |
591 | struct sk_buff *skb) | |
97c8389d | 592 | { |
e10f8c66 | 593 | struct fc_frame *fp; |
97c8389d JE |
594 | struct fc_frame_header *fh; |
595 | u16 old_xid; | |
596 | u8 op; | |
11b56188 | 597 | u8 mac[ETH_ALEN]; |
97c8389d | 598 | |
e10f8c66 | 599 | fp = container_of(skb, struct fc_frame, skb); |
97c8389d JE |
600 | fh = (struct fc_frame_header *)skb->data; |
601 | op = *(u8 *)(fh + 1); | |
602 | ||
e10f8c66 | 603 | if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) { |
97c8389d JE |
604 | old_xid = fip->flogi_oxid; |
605 | fip->flogi_oxid = ntohs(fh->fh_ox_id); | |
606 | if (fip->state == FIP_ST_AUTO) { | |
607 | if (old_xid == FC_XID_UNKNOWN) | |
608 | fip->flogi_count = 0; | |
609 | fip->flogi_count++; | |
610 | if (fip->flogi_count < 3) | |
611 | goto drop; | |
cd229e42 | 612 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
613 | return 0; |
614 | } | |
5f48f70e | 615 | if (fip->state == FIP_ST_NON_FIP) |
cd229e42 | 616 | fcoe_ctlr_map_dest(fip); |
5f48f70e JE |
617 | } |
618 | ||
619 | if (fip->state == FIP_ST_NON_FIP) | |
620 | return 0; | |
e10f8c66 | 621 | if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN) |
f31f2a1c | 622 | goto drop; |
5f48f70e JE |
623 | switch (op) { |
624 | case ELS_FLOGI: | |
97c8389d | 625 | op = FIP_DT_FLOGI; |
794d98e7 JE |
626 | if (fip->mode == FIP_MODE_VN2VN) |
627 | break; | |
628 | spin_lock_bh(&fip->ctlr_lock); | |
629 | kfree_skb(fip->flogi_req); | |
630 | fip->flogi_req = skb; | |
631 | fip->flogi_req_send = 1; | |
632 | spin_unlock_bh(&fip->ctlr_lock); | |
633 | schedule_work(&fip->timer_work); | |
634 | return -EINPROGRESS; | |
97c8389d JE |
635 | case ELS_FDISC: |
636 | if (ntoh24(fh->fh_s_id)) | |
637 | return 0; | |
638 | op = FIP_DT_FDISC; | |
639 | break; | |
640 | case ELS_LOGO: | |
e10f8c66 JE |
641 | if (fip->mode == FIP_MODE_VN2VN) { |
642 | if (fip->state != FIP_ST_VNMP_UP) | |
643 | return -EINVAL; | |
644 | if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI) | |
645 | return -EINVAL; | |
646 | } else { | |
647 | if (fip->state != FIP_ST_ENABLED) | |
648 | return 0; | |
649 | if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI) | |
650 | return 0; | |
651 | } | |
97c8389d JE |
652 | op = FIP_DT_LOGO; |
653 | break; | |
654 | case ELS_LS_ACC: | |
97c8389d | 655 | /* |
e10f8c66 | 656 | * If non-FIP, we may have gotten an SID by accepting an FLOGI |
97c8389d JE |
657 | * from a point-to-point connection. Switch to using |
658 | * the source mac based on the SID. The destination | |
25985edc | 659 | * MAC in this case would have been set by receiving the |
97c8389d JE |
660 | * FLOGI. |
661 | */ | |
e10f8c66 JE |
662 | if (fip->state == FIP_ST_NON_FIP) { |
663 | if (fip->flogi_oxid == FC_XID_UNKNOWN) | |
664 | return 0; | |
665 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
666 | fc_fcoe_set_mac(mac, fh->fh_d_id); | |
667 | fip->update_mac(lport, mac); | |
668 | } | |
669 | /* fall through */ | |
670 | case ELS_LS_RJT: | |
671 | op = fr_encaps(fp); | |
672 | if (op) | |
673 | break; | |
97c8389d JE |
674 | return 0; |
675 | default: | |
e10f8c66 JE |
676 | if (fip->state != FIP_ST_ENABLED && |
677 | fip->state != FIP_ST_VNMP_UP) | |
97c8389d JE |
678 | goto drop; |
679 | return 0; | |
680 | } | |
e10f8c66 JE |
681 | LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n", |
682 | op, ntoh24(fh->fh_d_id)); | |
683 | if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id))) | |
97c8389d JE |
684 | goto drop; |
685 | fip->send(fip, skb); | |
686 | return -EINPROGRESS; | |
687 | drop: | |
688 | kfree_skb(skb); | |
689 | return -EINVAL; | |
690 | } | |
691 | EXPORT_SYMBOL(fcoe_ctlr_els_send); | |
692 | ||
70b51aab RL |
693 | /** |
694 | * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller | |
695 | * @fip: The FCoE controller to free FCFs on | |
97c8389d | 696 | * |
f018b73a | 697 | * Called with lock held and preemption disabled. |
97c8389d | 698 | * |
8690cb83 JE |
699 | * An FCF is considered old if we have missed two advertisements. |
700 | * That is, there have been no valid advertisement from it for 2.5 | |
701 | * times its keep-alive period. | |
97c8389d JE |
702 | * |
703 | * In addition, determine the time when an FCF selection can occur. | |
f3da80e7 YZ |
704 | * |
705 | * Also, increment the MissDiscAdvCount when no advertisement is received | |
706 | * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB). | |
8690cb83 JE |
707 | * |
708 | * Returns the time in jiffies for the next call. | |
97c8389d | 709 | */ |
8690cb83 | 710 | static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip) |
97c8389d JE |
711 | { |
712 | struct fcoe_fcf *fcf; | |
713 | struct fcoe_fcf *next; | |
8690cb83 JE |
714 | unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD); |
715 | unsigned long deadline; | |
97c8389d | 716 | unsigned long sel_time = 0; |
f018b73a | 717 | struct fcoe_dev_stats *stats; |
97c8389d | 718 | |
fdb068c6 JE |
719 | stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu()); |
720 | ||
97c8389d | 721 | list_for_each_entry_safe(fcf, next, &fip->fcfs, list) { |
8690cb83 JE |
722 | deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2; |
723 | if (fip->sel_fcf == fcf) { | |
724 | if (time_after(jiffies, deadline)) { | |
8690cb83 JE |
725 | stats->MissDiscAdvCount++; |
726 | printk(KERN_INFO "libfcoe: host%d: " | |
727 | "Missing Discovery Advertisement " | |
728 | "for fab %16.16llx count %lld\n", | |
729 | fip->lp->host->host_no, fcf->fabric_name, | |
730 | stats->MissDiscAdvCount); | |
731 | } else if (time_after(next_timer, deadline)) | |
732 | next_timer = deadline; | |
f3da80e7 | 733 | } |
8690cb83 JE |
734 | |
735 | deadline += fcf->fka_period; | |
d99ee45b | 736 | if (time_after_eq(jiffies, deadline)) { |
97c8389d JE |
737 | if (fip->sel_fcf == fcf) |
738 | fip->sel_fcf = NULL; | |
739 | list_del(&fcf->list); | |
740 | WARN_ON(!fip->fcf_count); | |
741 | fip->fcf_count--; | |
742 | kfree(fcf); | |
f018b73a | 743 | stats->VLinkFailureCount++; |
8690cb83 JE |
744 | } else { |
745 | if (time_after(next_timer, deadline)) | |
746 | next_timer = deadline; | |
747 | if (fcoe_ctlr_mtu_valid(fcf) && | |
748 | (!sel_time || time_before(sel_time, fcf->time))) | |
749 | sel_time = fcf->time; | |
97c8389d JE |
750 | } |
751 | } | |
fdb068c6 | 752 | put_cpu(); |
d99ee45b | 753 | if (sel_time && !fip->sel_fcf && !fip->sel_time) { |
97c8389d JE |
754 | sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
755 | fip->sel_time = sel_time; | |
97c8389d | 756 | } |
d99ee45b | 757 | |
8690cb83 | 758 | return next_timer; |
97c8389d JE |
759 | } |
760 | ||
761 | /** | |
70b51aab | 762 | * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry |
0f51c2e5 | 763 | * @fip: The FCoE controller receiving the advertisement |
70b51aab RL |
764 | * @skb: The received FIP advertisement frame |
765 | * @fcf: The resulting FCF entry | |
97c8389d JE |
766 | * |
767 | * Returns zero on a valid parsed advertisement, | |
768 | * otherwise returns non zero value. | |
769 | */ | |
0f51c2e5 JE |
770 | static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip, |
771 | struct sk_buff *skb, struct fcoe_fcf *fcf) | |
97c8389d JE |
772 | { |
773 | struct fip_header *fiph; | |
774 | struct fip_desc *desc = NULL; | |
775 | struct fip_wwn_desc *wwn; | |
776 | struct fip_fab_desc *fab; | |
777 | struct fip_fka_desc *fka; | |
778 | unsigned long t; | |
779 | size_t rlen; | |
780 | size_t dlen; | |
0a9c5d34 | 781 | u32 desc_mask; |
97c8389d JE |
782 | |
783 | memset(fcf, 0, sizeof(*fcf)); | |
784 | fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA); | |
785 | ||
786 | fiph = (struct fip_header *)skb->data; | |
787 | fcf->flags = ntohs(fiph->fip_flags); | |
788 | ||
0a9c5d34 BPG |
789 | /* |
790 | * mask of required descriptors. validating each one clears its bit. | |
791 | */ | |
792 | desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
793 | BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA); | |
794 | ||
97c8389d JE |
795 | rlen = ntohs(fiph->fip_dl_len) * 4; |
796 | if (rlen + sizeof(*fiph) > skb->len) | |
797 | return -EINVAL; | |
798 | ||
799 | desc = (struct fip_desc *)(fiph + 1); | |
800 | while (rlen > 0) { | |
801 | dlen = desc->fip_dlen * FIP_BPW; | |
802 | if (dlen < sizeof(*desc) || dlen > rlen) | |
803 | return -EINVAL; | |
0a9c5d34 BPG |
804 | /* Drop Adv if there are duplicate critical descriptors */ |
805 | if ((desc->fip_dtype < 32) && | |
806 | !(desc_mask & 1U << desc->fip_dtype)) { | |
807 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
808 | "Descriptors in FIP adv\n"); | |
809 | return -EINVAL; | |
810 | } | |
97c8389d JE |
811 | switch (desc->fip_dtype) { |
812 | case FIP_DT_PRI: | |
813 | if (dlen != sizeof(struct fip_pri_desc)) | |
814 | goto len_err; | |
815 | fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri; | |
0a9c5d34 | 816 | desc_mask &= ~BIT(FIP_DT_PRI); |
97c8389d JE |
817 | break; |
818 | case FIP_DT_MAC: | |
819 | if (dlen != sizeof(struct fip_mac_desc)) | |
820 | goto len_err; | |
821 | memcpy(fcf->fcf_mac, | |
822 | ((struct fip_mac_desc *)desc)->fd_mac, | |
823 | ETH_ALEN); | |
824 | if (!is_valid_ether_addr(fcf->fcf_mac)) { | |
e10f8c66 JE |
825 | LIBFCOE_FIP_DBG(fip, |
826 | "Invalid MAC addr %pM in FIP adv\n", | |
827 | fcf->fcf_mac); | |
97c8389d JE |
828 | return -EINVAL; |
829 | } | |
0a9c5d34 | 830 | desc_mask &= ~BIT(FIP_DT_MAC); |
97c8389d JE |
831 | break; |
832 | case FIP_DT_NAME: | |
833 | if (dlen != sizeof(struct fip_wwn_desc)) | |
834 | goto len_err; | |
835 | wwn = (struct fip_wwn_desc *)desc; | |
836 | fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn); | |
0a9c5d34 | 837 | desc_mask &= ~BIT(FIP_DT_NAME); |
97c8389d JE |
838 | break; |
839 | case FIP_DT_FAB: | |
840 | if (dlen != sizeof(struct fip_fab_desc)) | |
841 | goto len_err; | |
842 | fab = (struct fip_fab_desc *)desc; | |
843 | fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn); | |
844 | fcf->vfid = ntohs(fab->fd_vfid); | |
845 | fcf->fc_map = ntoh24(fab->fd_map); | |
0a9c5d34 | 846 | desc_mask &= ~BIT(FIP_DT_FAB); |
97c8389d JE |
847 | break; |
848 | case FIP_DT_FKA: | |
849 | if (dlen != sizeof(struct fip_fka_desc)) | |
850 | goto len_err; | |
851 | fka = (struct fip_fka_desc *)desc; | |
8cdffdcc YZ |
852 | if (fka->fd_flags & FIP_FKA_ADV_D) |
853 | fcf->fd_flags = 1; | |
97c8389d JE |
854 | t = ntohl(fka->fd_fka_period); |
855 | if (t >= FCOE_CTLR_MIN_FKA) | |
856 | fcf->fka_period = msecs_to_jiffies(t); | |
0a9c5d34 | 857 | desc_mask &= ~BIT(FIP_DT_FKA); |
97c8389d JE |
858 | break; |
859 | case FIP_DT_MAP_OUI: | |
860 | case FIP_DT_FCOE_SIZE: | |
861 | case FIP_DT_FLOGI: | |
862 | case FIP_DT_FDISC: | |
863 | case FIP_DT_LOGO: | |
864 | case FIP_DT_ELP: | |
865 | default: | |
0f51c2e5 | 866 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 867 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
868 | /* standard says ignore unknown descriptors >= 128 */ |
869 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
870 | return -EINVAL; | |
1508f3ec | 871 | break; |
97c8389d JE |
872 | } |
873 | desc = (struct fip_desc *)((char *)desc + dlen); | |
874 | rlen -= dlen; | |
875 | } | |
876 | if (!fcf->fc_map || (fcf->fc_map & 0x10000)) | |
877 | return -EINVAL; | |
240778e8 | 878 | if (!fcf->switch_name) |
97c8389d | 879 | return -EINVAL; |
0a9c5d34 BPG |
880 | if (desc_mask) { |
881 | LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n", | |
882 | desc_mask); | |
883 | return -EINVAL; | |
884 | } | |
97c8389d JE |
885 | return 0; |
886 | ||
887 | len_err: | |
0f51c2e5 | 888 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 889 | desc->fip_dtype, dlen); |
97c8389d JE |
890 | return -EINVAL; |
891 | } | |
892 | ||
893 | /** | |
70b51aab RL |
894 | * fcoe_ctlr_recv_adv() - Handle an incoming advertisement |
895 | * @fip: The FCoE controller receiving the advertisement | |
896 | * @skb: The received FIP packet | |
97c8389d JE |
897 | */ |
898 | static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
899 | { | |
900 | struct fcoe_fcf *fcf; | |
901 | struct fcoe_fcf new; | |
902 | struct fcoe_fcf *found; | |
903 | unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV); | |
904 | int first = 0; | |
905 | int mtu_valid; | |
906 | ||
0f51c2e5 | 907 | if (fcoe_ctlr_parse_adv(fip, skb, &new)) |
97c8389d JE |
908 | return; |
909 | ||
fdb068c6 | 910 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
911 | first = list_empty(&fip->fcfs); |
912 | found = NULL; | |
913 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
914 | if (fcf->switch_name == new.switch_name && | |
915 | fcf->fabric_name == new.fabric_name && | |
916 | fcf->fc_map == new.fc_map && | |
917 | compare_ether_addr(fcf->fcf_mac, new.fcf_mac) == 0) { | |
918 | found = fcf; | |
919 | break; | |
920 | } | |
921 | } | |
922 | if (!found) { | |
923 | if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT) | |
924 | goto out; | |
925 | ||
926 | fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC); | |
927 | if (!fcf) | |
928 | goto out; | |
929 | ||
930 | fip->fcf_count++; | |
931 | memcpy(fcf, &new, sizeof(new)); | |
932 | list_add(&fcf->list, &fip->fcfs); | |
933 | } else { | |
934 | /* | |
c600fea2 JE |
935 | * Update the FCF's keep-alive descriptor flags. |
936 | * Other flag changes from new advertisements are | |
937 | * ignored after a solicited advertisement is | |
938 | * received and the FCF is selectable (usable). | |
97c8389d | 939 | */ |
c600fea2 JE |
940 | fcf->fd_flags = new.fd_flags; |
941 | if (!fcoe_ctlr_fcf_usable(fcf)) | |
942 | fcf->flags = new.flags; | |
943 | ||
d99ee45b | 944 | if (fcf == fip->sel_fcf && !fcf->fd_flags) { |
97c8389d JE |
945 | fip->ctlr_ka_time -= fcf->fka_period; |
946 | fip->ctlr_ka_time += new.fka_period; | |
947 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
948 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
c600fea2 | 949 | } |
97c8389d JE |
950 | fcf->fka_period = new.fka_period; |
951 | memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN); | |
952 | } | |
953 | mtu_valid = fcoe_ctlr_mtu_valid(fcf); | |
954 | fcf->time = jiffies; | |
9069f5c4 JE |
955 | if (!found) |
956 | LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n", | |
957 | fcf->fabric_name, fcf->fcf_mac); | |
97c8389d JE |
958 | |
959 | /* | |
960 | * If this advertisement is not solicited and our max receive size | |
961 | * hasn't been verified, send a solicited advertisement. | |
962 | */ | |
963 | if (!mtu_valid) | |
964 | fcoe_ctlr_solicit(fip, fcf); | |
965 | ||
966 | /* | |
967 | * If its been a while since we did a solicit, and this is | |
968 | * the first advertisement we've received, do a multicast | |
969 | * solicitation to gather as many advertisements as we can | |
970 | * before selection occurs. | |
971 | */ | |
972 | if (first && time_after(jiffies, fip->sol_time + sol_tov)) | |
973 | fcoe_ctlr_solicit(fip, NULL); | |
974 | ||
981c1154 JE |
975 | /* |
976 | * Put this FCF at the head of the list for priority among equals. | |
977 | * This helps in the case of an NPV switch which insists we use | |
978 | * the FCF that answers multicast solicitations, not the others that | |
979 | * are sending periodic multicast advertisements. | |
980 | */ | |
981 | if (mtu_valid) { | |
982 | list_del(&fcf->list); | |
983 | list_add(&fcf->list, &fip->fcfs); | |
984 | } | |
985 | ||
97c8389d JE |
986 | /* |
987 | * If this is the first validated FCF, note the time and | |
988 | * set a timer to trigger selection. | |
989 | */ | |
d99ee45b | 990 | if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) { |
97c8389d | 991 | fip->sel_time = jiffies + |
70b51aab | 992 | msecs_to_jiffies(FCOE_CTLR_START_DELAY); |
97c8389d JE |
993 | if (!timer_pending(&fip->timer) || |
994 | time_before(fip->sel_time, fip->timer.expires)) | |
995 | mod_timer(&fip->timer, fip->sel_time); | |
996 | } | |
997 | out: | |
fdb068c6 | 998 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
999 | } |
1000 | ||
1001 | /** | |
70b51aab RL |
1002 | * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame |
1003 | * @fip: The FCoE controller which received the packet | |
1004 | * @skb: The received FIP packet | |
97c8389d JE |
1005 | */ |
1006 | static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1007 | { | |
70b51aab | 1008 | struct fc_lport *lport = fip->lp; |
97c8389d | 1009 | struct fip_header *fiph; |
11b56188 | 1010 | struct fc_frame *fp = (struct fc_frame *)skb; |
97c8389d JE |
1011 | struct fc_frame_header *fh = NULL; |
1012 | struct fip_desc *desc; | |
1013 | struct fip_encaps *els; | |
1014 | struct fcoe_dev_stats *stats; | |
1015 | enum fip_desc_type els_dtype = 0; | |
1016 | u8 els_op; | |
1017 | u8 sub; | |
1018 | u8 granted_mac[ETH_ALEN] = { 0 }; | |
1019 | size_t els_len = 0; | |
1020 | size_t rlen; | |
1021 | size_t dlen; | |
be61331d BPG |
1022 | u32 desc_mask = 0; |
1023 | u32 desc_cnt = 0; | |
97c8389d JE |
1024 | |
1025 | fiph = (struct fip_header *)skb->data; | |
1026 | sub = fiph->fip_subcode; | |
1027 | if (sub != FIP_SC_REQ && sub != FIP_SC_REP) | |
1028 | goto drop; | |
1029 | ||
1030 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
1031 | if (rlen + sizeof(*fiph) > skb->len) | |
1032 | goto drop; | |
1033 | ||
1034 | desc = (struct fip_desc *)(fiph + 1); | |
1035 | while (rlen > 0) { | |
be61331d | 1036 | desc_cnt++; |
97c8389d JE |
1037 | dlen = desc->fip_dlen * FIP_BPW; |
1038 | if (dlen < sizeof(*desc) || dlen > rlen) | |
1039 | goto drop; | |
0a9c5d34 BPG |
1040 | /* Drop ELS if there are duplicate critical descriptors */ |
1041 | if (desc->fip_dtype < 32) { | |
be61331d | 1042 | if (desc_mask & 1U << desc->fip_dtype) { |
0a9c5d34 BPG |
1043 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " |
1044 | "Descriptors in FIP ELS\n"); | |
1045 | goto drop; | |
1046 | } | |
be61331d | 1047 | desc_mask |= (1 << desc->fip_dtype); |
0a9c5d34 | 1048 | } |
97c8389d JE |
1049 | switch (desc->fip_dtype) { |
1050 | case FIP_DT_MAC: | |
be61331d BPG |
1051 | if (desc_cnt == 1) { |
1052 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1053 | "received out of order\n"); | |
1054 | goto drop; | |
1055 | } | |
1056 | ||
97c8389d JE |
1057 | if (dlen != sizeof(struct fip_mac_desc)) |
1058 | goto len_err; | |
1059 | memcpy(granted_mac, | |
1060 | ((struct fip_mac_desc *)desc)->fd_mac, | |
1061 | ETH_ALEN); | |
97c8389d JE |
1062 | break; |
1063 | case FIP_DT_FLOGI: | |
1064 | case FIP_DT_FDISC: | |
1065 | case FIP_DT_LOGO: | |
1066 | case FIP_DT_ELP: | |
be61331d BPG |
1067 | if (desc_cnt != 1) { |
1068 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1069 | "received out of order\n"); | |
1070 | goto drop; | |
1071 | } | |
97c8389d JE |
1072 | if (fh) |
1073 | goto drop; | |
1074 | if (dlen < sizeof(*els) + sizeof(*fh) + 1) | |
1075 | goto len_err; | |
1076 | els_len = dlen - sizeof(*els); | |
1077 | els = (struct fip_encaps *)desc; | |
1078 | fh = (struct fc_frame_header *)(els + 1); | |
1079 | els_dtype = desc->fip_dtype; | |
1080 | break; | |
1081 | default: | |
0f51c2e5 | 1082 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " |
650bd12b | 1083 | "in FIP adv\n", desc->fip_dtype); |
97c8389d JE |
1084 | /* standard says ignore unknown descriptors >= 128 */ |
1085 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1086 | goto drop; | |
be61331d BPG |
1087 | if (desc_cnt <= 2) { |
1088 | LIBFCOE_FIP_DBG(fip, "FIP descriptors " | |
1089 | "received out of order\n"); | |
1090 | goto drop; | |
1091 | } | |
1508f3ec | 1092 | break; |
97c8389d JE |
1093 | } |
1094 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1095 | rlen -= dlen; | |
1096 | } | |
1097 | ||
1098 | if (!fh) | |
1099 | goto drop; | |
1100 | els_op = *(u8 *)(fh + 1); | |
1101 | ||
e10f8c66 | 1102 | if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) && |
794d98e7 JE |
1103 | sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) { |
1104 | if (els_op == ELS_LS_ACC) { | |
1105 | if (!is_valid_ether_addr(granted_mac)) { | |
1106 | LIBFCOE_FIP_DBG(fip, | |
1107 | "Invalid MAC address %pM in FIP ELS\n", | |
1108 | granted_mac); | |
1109 | goto drop; | |
1110 | } | |
1111 | memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN); | |
e10f8c66 | 1112 | |
794d98e7 JE |
1113 | if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) { |
1114 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
1115 | if (els_dtype == FIP_DT_FLOGI) | |
1116 | fcoe_ctlr_announce(fip); | |
1117 | } | |
1118 | } else if (els_dtype == FIP_DT_FLOGI && | |
1119 | !fcoe_ctlr_flogi_retry(fip)) | |
1120 | goto drop; /* retrying FLOGI so drop reject */ | |
e10f8c66 | 1121 | } |
97c8389d | 1122 | |
be61331d BPG |
1123 | if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) && |
1124 | (!(1U << FIP_DT_MAC & desc_mask)))) { | |
1125 | LIBFCOE_FIP_DBG(fip, "Missing critical descriptors " | |
1126 | "in FIP ELS\n"); | |
1127 | goto drop; | |
1128 | } | |
1129 | ||
97c8389d JE |
1130 | /* |
1131 | * Convert skb into an fc_frame containing only the ELS. | |
1132 | */ | |
1133 | skb_pull(skb, (u8 *)fh - skb->data); | |
1134 | skb_trim(skb, els_len); | |
1135 | fp = (struct fc_frame *)skb; | |
1136 | fc_frame_init(fp); | |
1137 | fr_sof(fp) = FC_SOF_I3; | |
1138 | fr_eof(fp) = FC_EOF_T; | |
70b51aab | 1139 | fr_dev(fp) = lport; |
e10f8c66 | 1140 | fr_encaps(fp) = els_dtype; |
97c8389d | 1141 | |
f018b73a | 1142 | stats = per_cpu_ptr(lport->dev_stats, get_cpu()); |
97c8389d JE |
1143 | stats->RxFrames++; |
1144 | stats->RxWords += skb->len / FIP_BPW; | |
f018b73a | 1145 | put_cpu(); |
97c8389d | 1146 | |
70b51aab | 1147 | fc_exch_recv(lport, fp); |
97c8389d JE |
1148 | return; |
1149 | ||
1150 | len_err: | |
0f51c2e5 | 1151 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", |
650bd12b | 1152 | desc->fip_dtype, dlen); |
97c8389d JE |
1153 | drop: |
1154 | kfree_skb(skb); | |
1155 | } | |
1156 | ||
1157 | /** | |
70b51aab RL |
1158 | * fcoe_ctlr_recv_els() - Handle an incoming link reset frame |
1159 | * @fip: The FCoE controller that received the frame | |
1160 | * @fh: The received FIP header | |
97c8389d JE |
1161 | * |
1162 | * There may be multiple VN_Port descriptors. | |
1163 | * The overall length has already been checked. | |
1164 | */ | |
1165 | static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip, | |
70b51aab | 1166 | struct fip_header *fh) |
97c8389d JE |
1167 | { |
1168 | struct fip_desc *desc; | |
1169 | struct fip_mac_desc *mp; | |
1170 | struct fip_wwn_desc *wp; | |
1171 | struct fip_vn_desc *vp; | |
1172 | size_t rlen; | |
1173 | size_t dlen; | |
1174 | struct fcoe_fcf *fcf = fip->sel_fcf; | |
70b51aab | 1175 | struct fc_lport *lport = fip->lp; |
5550fda7 BPG |
1176 | struct fc_lport *vn_port = NULL; |
1177 | u32 desc_mask; | |
1178 | int is_vn_port = 0; | |
97c8389d | 1179 | |
0f51c2e5 | 1180 | LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n"); |
d29510a2 | 1181 | |
7b2787ec | 1182 | if (!fcf || !lport->port_id) |
97c8389d JE |
1183 | return; |
1184 | ||
1185 | /* | |
1186 | * mask of required descriptors. Validating each one clears its bit. | |
1187 | */ | |
1188 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID); | |
1189 | ||
1190 | rlen = ntohs(fh->fip_dl_len) * FIP_BPW; | |
1191 | desc = (struct fip_desc *)(fh + 1); | |
1192 | while (rlen >= sizeof(*desc)) { | |
1193 | dlen = desc->fip_dlen * FIP_BPW; | |
1194 | if (dlen > rlen) | |
1195 | return; | |
0a9c5d34 BPG |
1196 | /* Drop CVL if there are duplicate critical descriptors */ |
1197 | if ((desc->fip_dtype < 32) && | |
1198 | !(desc_mask & 1U << desc->fip_dtype)) { | |
1199 | LIBFCOE_FIP_DBG(fip, "Duplicate Critical " | |
1200 | "Descriptors in FIP CVL\n"); | |
1201 | return; | |
1202 | } | |
97c8389d JE |
1203 | switch (desc->fip_dtype) { |
1204 | case FIP_DT_MAC: | |
1205 | mp = (struct fip_mac_desc *)desc; | |
1206 | if (dlen < sizeof(*mp)) | |
1207 | return; | |
1208 | if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac)) | |
1209 | return; | |
1210 | desc_mask &= ~BIT(FIP_DT_MAC); | |
1211 | break; | |
1212 | case FIP_DT_NAME: | |
1213 | wp = (struct fip_wwn_desc *)desc; | |
1214 | if (dlen < sizeof(*wp)) | |
1215 | return; | |
1216 | if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name) | |
1217 | return; | |
1218 | desc_mask &= ~BIT(FIP_DT_NAME); | |
1219 | break; | |
1220 | case FIP_DT_VN_ID: | |
1221 | vp = (struct fip_vn_desc *)desc; | |
1222 | if (dlen < sizeof(*vp)) | |
1223 | return; | |
1224 | if (compare_ether_addr(vp->fd_mac, | |
70b51aab RL |
1225 | fip->get_src_addr(lport)) == 0 && |
1226 | get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn && | |
5550fda7 | 1227 | ntoh24(vp->fd_fc_id) == lport->port_id) { |
97c8389d | 1228 | desc_mask &= ~BIT(FIP_DT_VN_ID); |
5550fda7 BPG |
1229 | break; |
1230 | } | |
1231 | /* check if clr_vlink is for NPIV port */ | |
1232 | mutex_lock(&lport->lp_mutex); | |
1233 | list_for_each_entry(vn_port, &lport->vports, list) { | |
1234 | if (compare_ether_addr(vp->fd_mac, | |
1235 | fip->get_src_addr(vn_port)) == 0 && | |
1236 | (get_unaligned_be64(&vp->fd_wwpn) | |
1237 | == vn_port->wwpn) && | |
1238 | (ntoh24(vp->fd_fc_id) == | |
1239 | fc_host_port_id(vn_port->host))) { | |
1240 | desc_mask &= ~BIT(FIP_DT_VN_ID); | |
1241 | is_vn_port = 1; | |
1242 | break; | |
1243 | } | |
1244 | } | |
1245 | mutex_unlock(&lport->lp_mutex); | |
1246 | ||
97c8389d JE |
1247 | break; |
1248 | default: | |
1249 | /* standard says ignore unknown descriptors >= 128 */ | |
1250 | if (desc->fip_dtype < FIP_DT_VENDOR_BASE) | |
1251 | return; | |
1252 | break; | |
1253 | } | |
1254 | desc = (struct fip_desc *)((char *)desc + dlen); | |
1255 | rlen -= dlen; | |
1256 | } | |
1257 | ||
1258 | /* | |
1259 | * reset only if all required descriptors were present and valid. | |
1260 | */ | |
1261 | if (desc_mask) { | |
0f51c2e5 JE |
1262 | LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n", |
1263 | desc_mask); | |
97c8389d | 1264 | } else { |
0f51c2e5 | 1265 | LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n"); |
dd42dac4 | 1266 | |
5550fda7 BPG |
1267 | if (is_vn_port) |
1268 | fc_lport_reset(vn_port); | |
1269 | else { | |
fdb068c6 | 1270 | mutex_lock(&fip->ctlr_mutex); |
5550fda7 | 1271 | per_cpu_ptr(lport->dev_stats, |
fdb068c6 JE |
1272 | get_cpu())->VLinkFailureCount++; |
1273 | put_cpu(); | |
5550fda7 | 1274 | fcoe_ctlr_reset(fip); |
fdb068c6 | 1275 | mutex_unlock(&fip->ctlr_mutex); |
5550fda7 BPG |
1276 | |
1277 | fc_lport_reset(fip->lp); | |
1278 | fcoe_ctlr_solicit(fip, NULL); | |
1279 | } | |
97c8389d JE |
1280 | } |
1281 | } | |
1282 | ||
1283 | /** | |
70b51aab RL |
1284 | * fcoe_ctlr_recv() - Receive a FIP packet |
1285 | * @fip: The FCoE controller that received the packet | |
1286 | * @skb: The received FIP packet | |
97c8389d | 1287 | * |
1f4aed81 | 1288 | * This may be called from either NET_RX_SOFTIRQ or IRQ. |
97c8389d JE |
1289 | */ |
1290 | void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1291 | { | |
1f4aed81 | 1292 | skb_queue_tail(&fip->fip_recv_list, skb); |
97c8389d JE |
1293 | schedule_work(&fip->recv_work); |
1294 | } | |
1295 | EXPORT_SYMBOL(fcoe_ctlr_recv); | |
1296 | ||
1297 | /** | |
70b51aab RL |
1298 | * fcoe_ctlr_recv_handler() - Receive a FIP frame |
1299 | * @fip: The FCoE controller that received the frame | |
1300 | * @skb: The received FIP frame | |
97c8389d JE |
1301 | * |
1302 | * Returns non-zero if the frame is dropped. | |
1303 | */ | |
1304 | static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
1305 | { | |
1306 | struct fip_header *fiph; | |
1307 | struct ethhdr *eh; | |
1308 | enum fip_state state; | |
1309 | u16 op; | |
1310 | u8 sub; | |
1311 | ||
1312 | if (skb_linearize(skb)) | |
1313 | goto drop; | |
1314 | if (skb->len < sizeof(*fiph)) | |
1315 | goto drop; | |
1316 | eh = eth_hdr(skb); | |
e10f8c66 JE |
1317 | if (fip->mode == FIP_MODE_VN2VN) { |
1318 | if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1319 | compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) && | |
1320 | compare_ether_addr(eh->h_dest, fcoe_all_p2p)) | |
1321 | goto drop; | |
1322 | } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) && | |
1323 | compare_ether_addr(eh->h_dest, fcoe_all_enode)) | |
97c8389d JE |
1324 | goto drop; |
1325 | fiph = (struct fip_header *)skb->data; | |
1326 | op = ntohs(fiph->fip_op); | |
1327 | sub = fiph->fip_subcode; | |
1328 | ||
97c8389d JE |
1329 | if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER) |
1330 | goto drop; | |
1331 | if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len) | |
1332 | goto drop; | |
1333 | ||
fdb068c6 | 1334 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1335 | state = fip->state; |
1336 | if (state == FIP_ST_AUTO) { | |
1337 | fip->map_dest = 0; | |
9b651da9 | 1338 | fcoe_ctlr_set_state(fip, FIP_ST_ENABLED); |
97c8389d | 1339 | state = FIP_ST_ENABLED; |
0f51c2e5 | 1340 | LIBFCOE_FIP_DBG(fip, "Using FIP mode\n"); |
97c8389d | 1341 | } |
fdb068c6 | 1342 | mutex_unlock(&fip->ctlr_mutex); |
e10f8c66 JE |
1343 | |
1344 | if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN) | |
1345 | return fcoe_ctlr_vn_recv(fip, skb); | |
1346 | ||
1347 | if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP && | |
1348 | state != FIP_ST_VNMP_CLAIM) | |
97c8389d JE |
1349 | goto drop; |
1350 | ||
1351 | if (op == FIP_OP_LS) { | |
1352 | fcoe_ctlr_recv_els(fip, skb); /* consumes skb */ | |
1353 | return 0; | |
1354 | } | |
e10f8c66 JE |
1355 | |
1356 | if (state != FIP_ST_ENABLED) | |
1357 | goto drop; | |
1358 | ||
97c8389d JE |
1359 | if (op == FIP_OP_DISC && sub == FIP_SC_ADV) |
1360 | fcoe_ctlr_recv_adv(fip, skb); | |
1361 | else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK) | |
1362 | fcoe_ctlr_recv_clr_vlink(fip, fiph); | |
1363 | kfree_skb(skb); | |
1364 | return 0; | |
1365 | drop: | |
1366 | kfree_skb(skb); | |
1367 | return -1; | |
1368 | } | |
1369 | ||
1370 | /** | |
70b51aab RL |
1371 | * fcoe_ctlr_select() - Select the best FCF (if possible) |
1372 | * @fip: The FCoE controller | |
97c8389d | 1373 | * |
ba9cd5d0 JE |
1374 | * Returns the selected FCF, or NULL if none are usable. |
1375 | * | |
97c8389d JE |
1376 | * If there are conflicting advertisements, no FCF can be chosen. |
1377 | * | |
794d98e7 JE |
1378 | * If there is already a selected FCF, this will choose a better one or |
1379 | * an equivalent one that hasn't already been sent a FLOGI. | |
1380 | * | |
97c8389d JE |
1381 | * Called with lock held. |
1382 | */ | |
ba9cd5d0 | 1383 | static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip) |
97c8389d JE |
1384 | { |
1385 | struct fcoe_fcf *fcf; | |
794d98e7 | 1386 | struct fcoe_fcf *best = fip->sel_fcf; |
b69ae0ae JE |
1387 | struct fcoe_fcf *first; |
1388 | ||
1389 | first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list); | |
97c8389d JE |
1390 | |
1391 | list_for_each_entry(fcf, &fip->fcfs, list) { | |
9069f5c4 JE |
1392 | LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx " |
1393 | "VFID %d mac %pM map %x val %d " | |
1394 | "sent %u pri %u\n", | |
1395 | fcf->fabric_name, fcf->vfid, fcf->fcf_mac, | |
1396 | fcf->fc_map, fcoe_ctlr_mtu_valid(fcf), | |
1397 | fcf->flogi_sent, fcf->pri); | |
b69ae0ae JE |
1398 | if (fcf->fabric_name != first->fabric_name || |
1399 | fcf->vfid != first->vfid || | |
1400 | fcf->fc_map != first->fc_map) { | |
1401 | LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, " | |
1402 | "or FC-MAP\n"); | |
1403 | return NULL; | |
1404 | } | |
794d98e7 JE |
1405 | if (fcf->flogi_sent) |
1406 | continue; | |
97c8389d | 1407 | if (!fcoe_ctlr_fcf_usable(fcf)) { |
9f8f3aa6 CL |
1408 | LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx " |
1409 | "map %x %svalid %savailable\n", | |
1410 | fcf->fabric_name, fcf->fc_map, | |
1411 | (fcf->flags & FIP_FL_SOL) ? "" : "in", | |
1412 | (fcf->flags & FIP_FL_AVAIL) ? | |
1413 | "" : "un"); | |
97c8389d JE |
1414 | continue; |
1415 | } | |
794d98e7 | 1416 | if (!best || fcf->pri < best->pri || best->flogi_sent) |
97c8389d JE |
1417 | best = fcf; |
1418 | } | |
1419 | fip->sel_fcf = best; | |
c47036a7 | 1420 | if (best) { |
9069f5c4 | 1421 | LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac); |
c47036a7 JE |
1422 | fip->port_ka_time = jiffies + |
1423 | msecs_to_jiffies(FIP_VN_KA_PERIOD); | |
1424 | fip->ctlr_ka_time = jiffies + best->fka_period; | |
1425 | if (time_before(fip->ctlr_ka_time, fip->timer.expires)) | |
1426 | mod_timer(&fip->timer, fip->ctlr_ka_time); | |
1427 | } | |
ba9cd5d0 | 1428 | return best; |
97c8389d JE |
1429 | } |
1430 | ||
794d98e7 JE |
1431 | /** |
1432 | * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF | |
1433 | * @fip: The FCoE controller | |
1434 | * | |
1435 | * Returns non-zero error if it could not be sent. | |
1436 | * | |
1437 | * Called with ctlr_mutex and ctlr_lock held. | |
1438 | * Caller must verify that fip->sel_fcf is not NULL. | |
1439 | */ | |
1440 | static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip) | |
1441 | { | |
1442 | struct sk_buff *skb; | |
1443 | struct sk_buff *skb_orig; | |
1444 | struct fc_frame_header *fh; | |
1445 | int error; | |
1446 | ||
1447 | skb_orig = fip->flogi_req; | |
1448 | if (!skb_orig) | |
1449 | return -EINVAL; | |
1450 | ||
1451 | /* | |
1452 | * Clone and send the FLOGI request. If clone fails, use original. | |
1453 | */ | |
1454 | skb = skb_clone(skb_orig, GFP_ATOMIC); | |
1455 | if (!skb) { | |
1456 | skb = skb_orig; | |
1457 | fip->flogi_req = NULL; | |
1458 | } | |
1459 | fh = (struct fc_frame_header *)skb->data; | |
1460 | error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb, | |
1461 | ntoh24(fh->fh_d_id)); | |
1462 | if (error) { | |
1463 | kfree_skb(skb); | |
1464 | return error; | |
1465 | } | |
1466 | fip->send(fip, skb); | |
1467 | fip->sel_fcf->flogi_sent = 1; | |
1468 | return 0; | |
1469 | } | |
1470 | ||
1471 | /** | |
1472 | * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible | |
1473 | * @fip: The FCoE controller | |
1474 | * | |
1475 | * Returns non-zero error code if there's no FLOGI request to retry or | |
1476 | * no alternate FCF available. | |
1477 | */ | |
1478 | static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip) | |
1479 | { | |
1480 | struct fcoe_fcf *fcf; | |
1481 | int error; | |
1482 | ||
1483 | mutex_lock(&fip->ctlr_mutex); | |
1484 | spin_lock_bh(&fip->ctlr_lock); | |
1485 | LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1486 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1487 | if (!fcf || fcf->flogi_sent) { |
1488 | kfree_skb(fip->flogi_req); | |
1489 | fip->flogi_req = NULL; | |
1490 | error = -ENOENT; | |
1491 | } else { | |
1492 | fcoe_ctlr_solicit(fip, NULL); | |
1493 | error = fcoe_ctlr_flogi_send_locked(fip); | |
1494 | } | |
1495 | spin_unlock_bh(&fip->ctlr_lock); | |
1496 | mutex_unlock(&fip->ctlr_mutex); | |
1497 | return error; | |
1498 | } | |
1499 | ||
1500 | ||
1501 | /** | |
1502 | * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI. | |
1503 | * @fip: The FCoE controller that timed out | |
1504 | * | |
1505 | * Done here because fcoe_ctlr_els_send() can't get mutex. | |
1506 | * | |
1507 | * Called with ctlr_mutex held. The caller must not hold ctlr_lock. | |
1508 | */ | |
1509 | static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip) | |
1510 | { | |
1511 | struct fcoe_fcf *fcf; | |
1512 | ||
1513 | spin_lock_bh(&fip->ctlr_lock); | |
1514 | fcf = fip->sel_fcf; | |
1515 | if (!fcf || !fip->flogi_req_send) | |
1516 | goto unlock; | |
1517 | ||
1518 | LIBFCOE_FIP_DBG(fip, "sending FLOGI\n"); | |
1519 | ||
1520 | /* | |
1521 | * If this FLOGI is being sent due to a timeout retry | |
1522 | * to the same FCF as before, select a different FCF if possible. | |
1523 | */ | |
1524 | if (fcf->flogi_sent) { | |
1525 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n"); | |
ba9cd5d0 | 1526 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1527 | if (!fcf || fcf->flogi_sent) { |
1528 | LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n"); | |
1529 | list_for_each_entry(fcf, &fip->fcfs, list) | |
1530 | fcf->flogi_sent = 0; | |
ba9cd5d0 | 1531 | fcf = fcoe_ctlr_select(fip); |
794d98e7 JE |
1532 | } |
1533 | } | |
1534 | if (fcf) { | |
1535 | fcoe_ctlr_flogi_send_locked(fip); | |
1536 | fip->flogi_req_send = 0; | |
1537 | } else /* XXX */ | |
1538 | LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n"); | |
1539 | unlock: | |
1540 | spin_unlock_bh(&fip->ctlr_lock); | |
1541 | } | |
1542 | ||
97c8389d | 1543 | /** |
70b51aab RL |
1544 | * fcoe_ctlr_timeout() - FIP timeout handler |
1545 | * @arg: The FCoE controller that timed out | |
97c8389d JE |
1546 | */ |
1547 | static void fcoe_ctlr_timeout(unsigned long arg) | |
1548 | { | |
1549 | struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg; | |
fdb068c6 JE |
1550 | |
1551 | schedule_work(&fip->timer_work); | |
1552 | } | |
1553 | ||
1554 | /** | |
1555 | * fcoe_ctlr_timer_work() - Worker thread function for timer work | |
1556 | * @work: Handle to a FCoE controller | |
1557 | * | |
1558 | * Ages FCFs. Triggers FCF selection if possible. | |
1559 | * Sends keep-alives and resets. | |
1560 | */ | |
1561 | static void fcoe_ctlr_timer_work(struct work_struct *work) | |
1562 | { | |
1563 | struct fcoe_ctlr *fip; | |
1564 | struct fc_lport *vport; | |
1565 | u8 *mac; | |
1566 | u8 reset = 0; | |
1567 | u8 send_ctlr_ka = 0; | |
1568 | u8 send_port_ka = 0; | |
97c8389d JE |
1569 | struct fcoe_fcf *sel; |
1570 | struct fcoe_fcf *fcf; | |
8690cb83 | 1571 | unsigned long next_timer; |
97c8389d | 1572 | |
fdb068c6 | 1573 | fip = container_of(work, struct fcoe_ctlr, timer_work); |
e10f8c66 JE |
1574 | if (fip->mode == FIP_MODE_VN2VN) |
1575 | return fcoe_ctlr_vn_timeout(fip); | |
fdb068c6 | 1576 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1577 | if (fip->state == FIP_ST_DISABLED) { |
fdb068c6 | 1578 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1579 | return; |
1580 | } | |
1581 | ||
1582 | fcf = fip->sel_fcf; | |
8690cb83 | 1583 | next_timer = fcoe_ctlr_age_fcfs(fip); |
97c8389d JE |
1584 | |
1585 | sel = fip->sel_fcf; | |
8690cb83 JE |
1586 | if (!sel && fip->sel_time) { |
1587 | if (time_after_eq(jiffies, fip->sel_time)) { | |
ba9cd5d0 | 1588 | sel = fcoe_ctlr_select(fip); |
8690cb83 JE |
1589 | fip->sel_time = 0; |
1590 | } else if (time_after(next_timer, fip->sel_time)) | |
1591 | next_timer = fip->sel_time; | |
97c8389d JE |
1592 | } |
1593 | ||
794d98e7 JE |
1594 | if (sel && fip->flogi_req_send) |
1595 | fcoe_ctlr_flogi_send(fip); | |
1596 | else if (!sel && fcf) | |
1597 | reset = 1; | |
97c8389d | 1598 | |
8cdffdcc | 1599 | if (sel && !sel->fd_flags) { |
97c8389d JE |
1600 | if (time_after_eq(jiffies, fip->ctlr_ka_time)) { |
1601 | fip->ctlr_ka_time = jiffies + sel->fka_period; | |
fdb068c6 | 1602 | send_ctlr_ka = 1; |
97c8389d JE |
1603 | } |
1604 | if (time_after(next_timer, fip->ctlr_ka_time)) | |
1605 | next_timer = fip->ctlr_ka_time; | |
1606 | ||
1607 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
f47dd855 | 1608 | fip->port_ka_time = jiffies + |
70b51aab | 1609 | msecs_to_jiffies(FIP_VN_KA_PERIOD); |
fdb068c6 | 1610 | send_port_ka = 1; |
97c8389d JE |
1611 | } |
1612 | if (time_after(next_timer, fip->port_ka_time)) | |
1613 | next_timer = fip->port_ka_time; | |
97c8389d | 1614 | } |
8690cb83 JE |
1615 | if (!list_empty(&fip->fcfs)) |
1616 | mod_timer(&fip->timer, next_timer); | |
fdb068c6 | 1617 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d | 1618 | |
516a6486 | 1619 | if (reset) { |
dd42dac4 | 1620 | fc_lport_reset(fip->lp); |
516a6486 BPG |
1621 | /* restart things with a solicitation */ |
1622 | fcoe_ctlr_solicit(fip, NULL); | |
1623 | } | |
11b56188 | 1624 | |
fdb068c6 | 1625 | if (send_ctlr_ka) |
11b56188 | 1626 | fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr); |
fdb068c6 JE |
1627 | |
1628 | if (send_port_ka) { | |
11b56188 CL |
1629 | mutex_lock(&fip->lp->lp_mutex); |
1630 | mac = fip->get_src_addr(fip->lp); | |
1631 | fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac); | |
1632 | list_for_each_entry(vport, &fip->lp->vports, list) { | |
1633 | mac = fip->get_src_addr(vport); | |
1634 | fcoe_ctlr_send_keep_alive(fip, vport, 1, mac); | |
1635 | } | |
1636 | mutex_unlock(&fip->lp->lp_mutex); | |
1637 | } | |
97c8389d JE |
1638 | } |
1639 | ||
1640 | /** | |
70b51aab RL |
1641 | * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames |
1642 | * @recv_work: Handle to a FCoE controller | |
97c8389d JE |
1643 | */ |
1644 | static void fcoe_ctlr_recv_work(struct work_struct *recv_work) | |
1645 | { | |
1646 | struct fcoe_ctlr *fip; | |
1647 | struct sk_buff *skb; | |
1648 | ||
1649 | fip = container_of(recv_work, struct fcoe_ctlr, recv_work); | |
1f4aed81 | 1650 | while ((skb = skb_dequeue(&fip->fip_recv_list))) |
97c8389d | 1651 | fcoe_ctlr_recv_handler(fip, skb); |
97c8389d JE |
1652 | } |
1653 | ||
1654 | /** | |
386309ce | 1655 | * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response |
70b51aab RL |
1656 | * @fip: The FCoE controller |
1657 | * @fp: The FC frame to snoop | |
97c8389d JE |
1658 | * |
1659 | * Snoop potential response to FLOGI or even incoming FLOGI. | |
1660 | * | |
1661 | * The caller has checked that we are waiting for login as indicated | |
1662 | * by fip->flogi_oxid != FC_XID_UNKNOWN. | |
1663 | * | |
1664 | * The caller is responsible for freeing the frame. | |
386309ce | 1665 | * Fill in the granted_mac address. |
97c8389d JE |
1666 | * |
1667 | * Return non-zero if the frame should not be delivered to libfc. | |
1668 | */ | |
11b56188 | 1669 | int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport, |
386309ce | 1670 | struct fc_frame *fp) |
97c8389d JE |
1671 | { |
1672 | struct fc_frame_header *fh; | |
1673 | u8 op; | |
386309ce | 1674 | u8 *sa; |
97c8389d | 1675 | |
386309ce | 1676 | sa = eth_hdr(&fp->skb)->h_source; |
97c8389d JE |
1677 | fh = fc_frame_header_get(fp); |
1678 | if (fh->fh_type != FC_TYPE_ELS) | |
1679 | return 0; | |
1680 | ||
1681 | op = fc_frame_payload_op(fp); | |
1682 | if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP && | |
1683 | fip->flogi_oxid == ntohs(fh->fh_ox_id)) { | |
1684 | ||
fdb068c6 | 1685 | mutex_lock(&fip->ctlr_mutex); |
97c8389d | 1686 | if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) { |
fdb068c6 | 1687 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1688 | return -EINVAL; |
1689 | } | |
9b651da9 | 1690 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
0f51c2e5 JE |
1691 | LIBFCOE_FIP_DBG(fip, |
1692 | "received FLOGI LS_ACC using non-FIP mode\n"); | |
97c8389d JE |
1693 | |
1694 | /* | |
1695 | * FLOGI accepted. | |
1696 | * If the src mac addr is FC_OUI-based, then we mark the | |
1697 | * address_mode flag to use FC_OUI-based Ethernet DA. | |
1698 | * Otherwise we use the FCoE gateway addr | |
1699 | */ | |
1700 | if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) { | |
cd229e42 | 1701 | fcoe_ctlr_map_dest(fip); |
97c8389d JE |
1702 | } else { |
1703 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1704 | fip->map_dest = 0; | |
1705 | } | |
1706 | fip->flogi_oxid = FC_XID_UNKNOWN; | |
fdb068c6 | 1707 | mutex_unlock(&fip->ctlr_mutex); |
386309ce | 1708 | fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id); |
97c8389d JE |
1709 | } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) { |
1710 | /* | |
1711 | * Save source MAC for point-to-point responses. | |
1712 | */ | |
fdb068c6 | 1713 | mutex_lock(&fip->ctlr_mutex); |
97c8389d JE |
1714 | if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) { |
1715 | memcpy(fip->dest_addr, sa, ETH_ALEN); | |
1716 | fip->map_dest = 0; | |
e49bf614 JE |
1717 | if (fip->state == FIP_ST_AUTO) |
1718 | LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. " | |
1719 | "Setting non-FIP mode\n"); | |
9b651da9 | 1720 | fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP); |
97c8389d | 1721 | } |
fdb068c6 | 1722 | mutex_unlock(&fip->ctlr_mutex); |
97c8389d JE |
1723 | } |
1724 | return 0; | |
1725 | } | |
1726 | EXPORT_SYMBOL(fcoe_ctlr_recv_flogi); | |
1727 | ||
5e80f7f7 | 1728 | /** |
70b51aab RL |
1729 | * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN |
1730 | * @mac: The MAC address to convert | |
1731 | * @scheme: The scheme to use when converting | |
1732 | * @port: The port indicator for converting | |
5e80f7f7 VD |
1733 | * |
1734 | * Returns: u64 fc world wide name | |
1735 | */ | |
1736 | u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN], | |
1737 | unsigned int scheme, unsigned int port) | |
1738 | { | |
1739 | u64 wwn; | |
1740 | u64 host_mac; | |
1741 | ||
1742 | /* The MAC is in NO, so flip only the low 48 bits */ | |
1743 | host_mac = ((u64) mac[0] << 40) | | |
1744 | ((u64) mac[1] << 32) | | |
1745 | ((u64) mac[2] << 24) | | |
1746 | ((u64) mac[3] << 16) | | |
1747 | ((u64) mac[4] << 8) | | |
1748 | (u64) mac[5]; | |
1749 | ||
1750 | WARN_ON(host_mac >= (1ULL << 48)); | |
1751 | wwn = host_mac | ((u64) scheme << 60); | |
1752 | switch (scheme) { | |
1753 | case 1: | |
1754 | WARN_ON(port != 0); | |
1755 | break; | |
1756 | case 2: | |
1757 | WARN_ON(port >= 0xfff); | |
1758 | wwn |= (u64) port << 48; | |
1759 | break; | |
1760 | default: | |
1761 | WARN_ON(1); | |
1762 | break; | |
1763 | } | |
1764 | ||
1765 | return wwn; | |
1766 | } | |
1767 | EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac); | |
1768 | ||
e10f8c66 JE |
1769 | /** |
1770 | * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv | |
1771 | * @rdata: libfc remote port | |
1772 | */ | |
1773 | static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata) | |
1774 | { | |
1775 | return (struct fcoe_rport *)(rdata + 1); | |
1776 | } | |
1777 | ||
1778 | /** | |
1779 | * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply. | |
1780 | * @fip: The FCoE controller | |
1781 | * @sub: sub-opcode for probe request, reply, or advertisement. | |
1782 | * @dest: The destination Ethernet MAC address | |
1783 | * @min_len: minimum size of the Ethernet payload to be sent | |
1784 | */ | |
1785 | static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip, | |
1786 | enum fip_vn2vn_subcode sub, | |
1787 | const u8 *dest, size_t min_len) | |
1788 | { | |
1789 | struct sk_buff *skb; | |
1790 | struct fip_frame { | |
1791 | struct ethhdr eth; | |
1792 | struct fip_header fip; | |
1793 | struct fip_mac_desc mac; | |
1794 | struct fip_wwn_desc wwnn; | |
1795 | struct fip_vn_desc vn; | |
0095a921 | 1796 | } __packed * frame; |
e10f8c66 JE |
1797 | struct fip_fc4_feat *ff; |
1798 | struct fip_size_desc *size; | |
1799 | u32 fcp_feat; | |
1800 | size_t len; | |
1801 | size_t dlen; | |
1802 | ||
1803 | len = sizeof(*frame); | |
1804 | dlen = 0; | |
1805 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1806 | dlen = sizeof(struct fip_fc4_feat) + | |
1807 | sizeof(struct fip_size_desc); | |
1808 | len += dlen; | |
1809 | } | |
1810 | dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn); | |
1811 | len = max(len, min_len + sizeof(struct ethhdr)); | |
1812 | ||
1813 | skb = dev_alloc_skb(len); | |
1814 | if (!skb) | |
1815 | return; | |
1816 | ||
1817 | frame = (struct fip_frame *)skb->data; | |
1818 | memset(frame, 0, len); | |
1819 | memcpy(frame->eth.h_dest, dest, ETH_ALEN); | |
1820 | memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN); | |
1821 | frame->eth.h_proto = htons(ETH_P_FIP); | |
1822 | ||
1823 | frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER); | |
1824 | frame->fip.fip_op = htons(FIP_OP_VN2VN); | |
1825 | frame->fip.fip_subcode = sub; | |
1826 | frame->fip.fip_dl_len = htons(dlen / FIP_BPW); | |
1827 | ||
1828 | frame->mac.fd_desc.fip_dtype = FIP_DT_MAC; | |
1829 | frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW; | |
1830 | memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN); | |
1831 | ||
1832 | frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME; | |
1833 | frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW; | |
1834 | put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn); | |
1835 | ||
1836 | frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID; | |
1837 | frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW; | |
1838 | hton24(frame->vn.fd_mac, FIP_VN_FC_MAP); | |
1839 | hton24(frame->vn.fd_mac + 3, fip->port_id); | |
1840 | hton24(frame->vn.fd_fc_id, fip->port_id); | |
1841 | put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn); | |
1842 | ||
1843 | /* | |
1844 | * For claims, add FC-4 features. | |
1845 | * TBD: Add interface to get fc-4 types and features from libfc. | |
1846 | */ | |
1847 | if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) { | |
1848 | ff = (struct fip_fc4_feat *)(frame + 1); | |
1849 | ff->fd_desc.fip_dtype = FIP_DT_FC4F; | |
1850 | ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW; | |
1851 | ff->fd_fts = fip->lp->fcts; | |
1852 | ||
1853 | fcp_feat = 0; | |
1854 | if (fip->lp->service_params & FCP_SPPF_INIT_FCN) | |
1855 | fcp_feat |= FCP_FEAT_INIT; | |
1856 | if (fip->lp->service_params & FCP_SPPF_TARG_FCN) | |
1857 | fcp_feat |= FCP_FEAT_TARG; | |
1858 | fcp_feat <<= (FC_TYPE_FCP * 4) % 32; | |
1859 | ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat); | |
1860 | ||
1861 | size = (struct fip_size_desc *)(ff + 1); | |
1862 | size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE; | |
1863 | size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW; | |
1864 | size->fd_size = htons(fcoe_ctlr_fcoe_size(fip)); | |
1865 | } | |
1866 | ||
1867 | skb_put(skb, len); | |
1868 | skb->protocol = htons(ETH_P_FIP); | |
1869 | skb_reset_mac_header(skb); | |
1870 | skb_reset_network_header(skb); | |
1871 | ||
1872 | fip->send(fip, skb); | |
1873 | } | |
1874 | ||
1875 | /** | |
1876 | * fcoe_ctlr_vn_rport_callback - Event handler for rport events. | |
1877 | * @lport: The lport which is receiving the event | |
1878 | * @rdata: remote port private data | |
25985edc | 1879 | * @event: The event that occurred |
e10f8c66 JE |
1880 | * |
1881 | * Locking Note: The rport lock must not be held when calling this function. | |
1882 | */ | |
1883 | static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport, | |
1884 | struct fc_rport_priv *rdata, | |
1885 | enum fc_rport_event event) | |
1886 | { | |
1887 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1888 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
1889 | ||
1890 | LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n", | |
1891 | rdata->ids.port_id, event); | |
1892 | ||
1893 | mutex_lock(&fip->ctlr_mutex); | |
1894 | switch (event) { | |
1895 | case RPORT_EV_READY: | |
1896 | frport->login_count = 0; | |
1897 | break; | |
1898 | case RPORT_EV_LOGO: | |
1899 | case RPORT_EV_FAILED: | |
1900 | case RPORT_EV_STOP: | |
1901 | frport->login_count++; | |
1902 | if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) { | |
1903 | LIBFCOE_FIP_DBG(fip, | |
1904 | "rport FLOGI limited port_id %6.6x\n", | |
1905 | rdata->ids.port_id); | |
1906 | lport->tt.rport_logoff(rdata); | |
1907 | } | |
1908 | break; | |
1909 | default: | |
1910 | break; | |
1911 | } | |
1912 | mutex_unlock(&fip->ctlr_mutex); | |
1913 | } | |
1914 | ||
1915 | static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = { | |
1916 | .event_callback = fcoe_ctlr_vn_rport_callback, | |
1917 | }; | |
1918 | ||
1919 | /** | |
1920 | * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode | |
1921 | * @fip: The FCoE controller | |
1922 | * | |
1923 | * Called with ctlr_mutex held. | |
1924 | */ | |
1925 | static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport) | |
1926 | { | |
1927 | mutex_lock(&lport->disc.disc_mutex); | |
1928 | lport->disc.disc_callback = NULL; | |
1929 | mutex_unlock(&lport->disc.disc_mutex); | |
1930 | } | |
1931 | ||
1932 | /** | |
1933 | * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode | |
1934 | * @fip: The FCoE controller | |
1935 | * | |
1936 | * Called through the local port template for discovery. | |
1937 | * Called without the ctlr_mutex held. | |
1938 | */ | |
1939 | static void fcoe_ctlr_disc_stop(struct fc_lport *lport) | |
1940 | { | |
1941 | struct fcoe_ctlr *fip = lport->disc.priv; | |
1942 | ||
1943 | mutex_lock(&fip->ctlr_mutex); | |
1944 | fcoe_ctlr_disc_stop_locked(lport); | |
1945 | mutex_unlock(&fip->ctlr_mutex); | |
1946 | } | |
1947 | ||
1948 | /** | |
1949 | * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode | |
1950 | * @fip: The FCoE controller | |
1951 | * | |
1952 | * Called through the local port template for discovery. | |
1953 | * Called without the ctlr_mutex held. | |
1954 | */ | |
1955 | static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport) | |
1956 | { | |
1957 | fcoe_ctlr_disc_stop(lport); | |
1958 | lport->tt.rport_flush_queue(); | |
1959 | synchronize_rcu(); | |
1960 | } | |
1961 | ||
1962 | /** | |
1963 | * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id | |
1964 | * @fip: The FCoE controller | |
1965 | * | |
1966 | * Called with fcoe_ctlr lock held. | |
1967 | */ | |
1968 | static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip) | |
1969 | { | |
1970 | unsigned long wait; | |
1971 | u32 port_id; | |
1972 | ||
1973 | fcoe_ctlr_disc_stop_locked(fip->lp); | |
1974 | ||
1975 | /* | |
1976 | * Get proposed port ID. | |
1977 | * If this is the first try after link up, use any previous port_id. | |
1978 | * If there was none, use the low bits of the port_name. | |
1979 | * On subsequent tries, get the next random one. | |
1980 | * Don't use reserved IDs, use another non-zero value, just as random. | |
1981 | */ | |
1982 | port_id = fip->port_id; | |
1983 | if (fip->probe_tries) | |
1984 | port_id = prandom32(&fip->rnd_state) & 0xffff; | |
1985 | else if (!port_id) | |
1986 | port_id = fip->lp->wwpn & 0xffff; | |
1987 | if (!port_id || port_id == 0xffff) | |
1988 | port_id = 1; | |
1989 | fip->port_id = port_id; | |
1990 | ||
1991 | if (fip->probe_tries < FIP_VN_RLIM_COUNT) { | |
1992 | fip->probe_tries++; | |
1993 | wait = random32() % FIP_VN_PROBE_WAIT; | |
1994 | } else | |
1995 | wait = FIP_VN_RLIM_INT; | |
1996 | mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait)); | |
1997 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START); | |
1998 | } | |
1999 | ||
2000 | /** | |
2001 | * fcoe_ctlr_vn_start() - Start in VN2VN mode | |
2002 | * @fip: The FCoE controller | |
2003 | * | |
2004 | * Called with fcoe_ctlr lock held. | |
2005 | */ | |
2006 | static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip) | |
2007 | { | |
2008 | fip->probe_tries = 0; | |
2009 | prandom32_seed(&fip->rnd_state, fip->lp->wwpn); | |
2010 | fcoe_ctlr_vn_restart(fip); | |
2011 | } | |
2012 | ||
2013 | /** | |
2014 | * fcoe_ctlr_vn_parse - parse probe request or response | |
2015 | * @fip: The FCoE controller | |
2016 | * @skb: incoming packet | |
2017 | * @rdata: buffer for resulting parsed VN entry plus fcoe_rport | |
2018 | * | |
2019 | * Returns non-zero error number on error. | |
2020 | * Does not consume the packet. | |
2021 | */ | |
2022 | static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip, | |
2023 | struct sk_buff *skb, | |
2024 | struct fc_rport_priv *rdata) | |
2025 | { | |
2026 | struct fip_header *fiph; | |
2027 | struct fip_desc *desc = NULL; | |
2028 | struct fip_mac_desc *macd = NULL; | |
2029 | struct fip_wwn_desc *wwn = NULL; | |
2030 | struct fip_vn_desc *vn = NULL; | |
2031 | struct fip_size_desc *size = NULL; | |
2032 | struct fcoe_rport *frport; | |
2033 | size_t rlen; | |
2034 | size_t dlen; | |
2035 | u32 desc_mask = 0; | |
2036 | u32 dtype; | |
2037 | u8 sub; | |
2038 | ||
2039 | memset(rdata, 0, sizeof(*rdata) + sizeof(*frport)); | |
2040 | frport = fcoe_ctlr_rport(rdata); | |
2041 | ||
2042 | fiph = (struct fip_header *)skb->data; | |
2043 | frport->flags = ntohs(fiph->fip_flags); | |
2044 | ||
2045 | sub = fiph->fip_subcode; | |
2046 | switch (sub) { | |
2047 | case FIP_SC_VN_PROBE_REQ: | |
2048 | case FIP_SC_VN_PROBE_REP: | |
2049 | case FIP_SC_VN_BEACON: | |
2050 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2051 | BIT(FIP_DT_VN_ID); | |
2052 | break; | |
2053 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2054 | case FIP_SC_VN_CLAIM_REP: | |
2055 | desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | | |
2056 | BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) | | |
2057 | BIT(FIP_DT_FCOE_SIZE); | |
2058 | break; | |
2059 | default: | |
2060 | LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub); | |
2061 | return -EINVAL; | |
2062 | } | |
2063 | ||
2064 | rlen = ntohs(fiph->fip_dl_len) * 4; | |
2065 | if (rlen + sizeof(*fiph) > skb->len) | |
2066 | return -EINVAL; | |
2067 | ||
2068 | desc = (struct fip_desc *)(fiph + 1); | |
2069 | while (rlen > 0) { | |
2070 | dlen = desc->fip_dlen * FIP_BPW; | |
2071 | if (dlen < sizeof(*desc) || dlen > rlen) | |
2072 | return -EINVAL; | |
2073 | ||
2074 | dtype = desc->fip_dtype; | |
2075 | if (dtype < 32) { | |
2076 | if (!(desc_mask & BIT(dtype))) { | |
2077 | LIBFCOE_FIP_DBG(fip, | |
2078 | "unexpected or duplicated desc " | |
2079 | "desc type %u in " | |
2080 | "FIP VN2VN subtype %u\n", | |
2081 | dtype, sub); | |
2082 | return -EINVAL; | |
2083 | } | |
2084 | desc_mask &= ~BIT(dtype); | |
2085 | } | |
2086 | ||
2087 | switch (dtype) { | |
2088 | case FIP_DT_MAC: | |
2089 | if (dlen != sizeof(struct fip_mac_desc)) | |
2090 | goto len_err; | |
2091 | macd = (struct fip_mac_desc *)desc; | |
2092 | if (!is_valid_ether_addr(macd->fd_mac)) { | |
2093 | LIBFCOE_FIP_DBG(fip, | |
2094 | "Invalid MAC addr %pM in FIP VN2VN\n", | |
2095 | macd->fd_mac); | |
2096 | return -EINVAL; | |
2097 | } | |
2098 | memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN); | |
2099 | break; | |
2100 | case FIP_DT_NAME: | |
2101 | if (dlen != sizeof(struct fip_wwn_desc)) | |
2102 | goto len_err; | |
2103 | wwn = (struct fip_wwn_desc *)desc; | |
2104 | rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn); | |
2105 | break; | |
2106 | case FIP_DT_VN_ID: | |
2107 | if (dlen != sizeof(struct fip_vn_desc)) | |
2108 | goto len_err; | |
2109 | vn = (struct fip_vn_desc *)desc; | |
2110 | memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN); | |
2111 | rdata->ids.port_id = ntoh24(vn->fd_fc_id); | |
2112 | rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn); | |
2113 | break; | |
2114 | case FIP_DT_FC4F: | |
2115 | if (dlen != sizeof(struct fip_fc4_feat)) | |
2116 | goto len_err; | |
2117 | break; | |
2118 | case FIP_DT_FCOE_SIZE: | |
2119 | if (dlen != sizeof(struct fip_size_desc)) | |
2120 | goto len_err; | |
2121 | size = (struct fip_size_desc *)desc; | |
2122 | frport->fcoe_len = ntohs(size->fd_size); | |
2123 | break; | |
2124 | default: | |
2125 | LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x " | |
2126 | "in FIP probe\n", dtype); | |
2127 | /* standard says ignore unknown descriptors >= 128 */ | |
2128 | if (dtype < FIP_DT_VENDOR_BASE) | |
2129 | return -EINVAL; | |
2130 | break; | |
2131 | } | |
2132 | desc = (struct fip_desc *)((char *)desc + dlen); | |
2133 | rlen -= dlen; | |
2134 | } | |
2135 | return 0; | |
2136 | ||
2137 | len_err: | |
2138 | LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n", | |
2139 | dtype, dlen); | |
2140 | return -EINVAL; | |
2141 | } | |
2142 | ||
2143 | /** | |
2144 | * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification. | |
2145 | * @fip: The FCoE controller | |
2146 | * | |
2147 | * Called with ctlr_mutex held. | |
2148 | */ | |
2149 | static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip) | |
2150 | { | |
2151 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0); | |
2152 | fip->sol_time = jiffies; | |
2153 | } | |
2154 | ||
2155 | /** | |
2156 | * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request. | |
2157 | * @fip: The FCoE controller | |
2158 | * @rdata: parsed remote port with frport from the probe request | |
2159 | * | |
2160 | * Called with ctlr_mutex held. | |
2161 | */ | |
2162 | static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip, | |
2163 | struct fc_rport_priv *rdata) | |
2164 | { | |
2165 | struct fcoe_rport *frport = fcoe_ctlr_rport(rdata); | |
2166 | ||
2167 | if (rdata->ids.port_id != fip->port_id) | |
2168 | return; | |
2169 | ||
2170 | switch (fip->state) { | |
2171 | case FIP_ST_VNMP_CLAIM: | |
2172 | case FIP_ST_VNMP_UP: | |
2173 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2174 | frport->enode_mac, 0); | |
2175 | break; | |
2176 | case FIP_ST_VNMP_PROBE1: | |
2177 | case FIP_ST_VNMP_PROBE2: | |
2178 | /* | |
2179 | * Decide whether to reply to the Probe. | |
2180 | * Our selected address is never a "recorded" one, so | |
2181 | * only reply if our WWPN is greater and the | |
2182 | * Probe's REC bit is not set. | |
2183 | * If we don't reply, we will change our address. | |
2184 | */ | |
2185 | if (fip->lp->wwpn > rdata->ids.port_name && | |
2186 | !(frport->flags & FIP_FL_REC_OR_P2P)) { | |
2187 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP, | |
2188 | frport->enode_mac, 0); | |
2189 | break; | |
2190 | } | |
2191 | /* fall through */ | |
2192 | case FIP_ST_VNMP_START: | |
2193 | fcoe_ctlr_vn_restart(fip); | |
2194 | break; | |
2195 | default: | |
2196 | break; | |
2197 | } | |
2198 | } | |
2199 | ||
2200 | /** | |
2201 | * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply. | |
2202 | * @fip: The FCoE controller | |
2203 | * @rdata: parsed remote port with frport from the probe request | |
2204 | * | |
2205 | * Called with ctlr_mutex held. | |
2206 | */ | |
2207 | static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip, | |
2208 | struct fc_rport_priv *rdata) | |
2209 | { | |
2210 | if (rdata->ids.port_id != fip->port_id) | |
2211 | return; | |
2212 | switch (fip->state) { | |
2213 | case FIP_ST_VNMP_START: | |
2214 | case FIP_ST_VNMP_PROBE1: | |
2215 | case FIP_ST_VNMP_PROBE2: | |
2216 | case FIP_ST_VNMP_CLAIM: | |
2217 | fcoe_ctlr_vn_restart(fip); | |
2218 | break; | |
2219 | case FIP_ST_VNMP_UP: | |
2220 | fcoe_ctlr_vn_send_claim(fip); | |
2221 | break; | |
2222 | default: | |
2223 | break; | |
2224 | } | |
2225 | } | |
2226 | ||
2227 | /** | |
2228 | * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply. | |
2229 | * @fip: The FCoE controller | |
2230 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2231 | * | |
2232 | * Called with ctlr_mutex held. | |
2233 | */ | |
2234 | static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new) | |
2235 | { | |
2236 | struct fc_lport *lport = fip->lp; | |
2237 | struct fc_rport_priv *rdata; | |
2238 | struct fc_rport_identifiers *ids; | |
2239 | struct fcoe_rport *frport; | |
2240 | u32 port_id; | |
2241 | ||
2242 | port_id = new->ids.port_id; | |
2243 | if (port_id == fip->port_id) | |
2244 | return; | |
2245 | ||
2246 | mutex_lock(&lport->disc.disc_mutex); | |
2247 | rdata = lport->tt.rport_create(lport, port_id); | |
2248 | if (!rdata) { | |
2249 | mutex_unlock(&lport->disc.disc_mutex); | |
2250 | return; | |
2251 | } | |
2252 | ||
2253 | rdata->ops = &fcoe_ctlr_vn_rport_ops; | |
2254 | rdata->disc_id = lport->disc.disc_id; | |
2255 | ||
2256 | ids = &rdata->ids; | |
2257 | if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) || | |
2258 | (ids->node_name != -1 && ids->node_name != new->ids.node_name)) | |
2259 | lport->tt.rport_logoff(rdata); | |
2260 | ids->port_name = new->ids.port_name; | |
2261 | ids->node_name = new->ids.node_name; | |
2262 | mutex_unlock(&lport->disc.disc_mutex); | |
2263 | ||
2264 | frport = fcoe_ctlr_rport(rdata); | |
2265 | LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n", | |
2266 | port_id, frport->fcoe_len ? "old" : "new"); | |
2267 | *frport = *fcoe_ctlr_rport(new); | |
2268 | frport->time = 0; | |
2269 | } | |
2270 | ||
2271 | /** | |
2272 | * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address | |
2273 | * @fip: The FCoE controller | |
2274 | * @port_id: The port_id of the remote VN_node | |
2275 | * @mac: buffer which will hold the VN_NODE destination MAC address, if found. | |
2276 | * | |
2277 | * Returns non-zero error if no remote port found. | |
2278 | */ | |
2279 | static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac) | |
2280 | { | |
2281 | struct fc_lport *lport = fip->lp; | |
2282 | struct fc_rport_priv *rdata; | |
2283 | struct fcoe_rport *frport; | |
2284 | int ret = -1; | |
2285 | ||
2286 | rcu_read_lock(); | |
2287 | rdata = lport->tt.rport_lookup(lport, port_id); | |
2288 | if (rdata) { | |
2289 | frport = fcoe_ctlr_rport(rdata); | |
2290 | memcpy(mac, frport->enode_mac, ETH_ALEN); | |
2291 | ret = 0; | |
2292 | } | |
2293 | rcu_read_unlock(); | |
2294 | return ret; | |
2295 | } | |
2296 | ||
2297 | /** | |
2298 | * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification | |
2299 | * @fip: The FCoE controller | |
2300 | * @new: newly-parsed remote port with frport as a template for new rdata | |
2301 | * | |
2302 | * Called with ctlr_mutex held. | |
2303 | */ | |
2304 | static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip, | |
2305 | struct fc_rport_priv *new) | |
2306 | { | |
2307 | struct fcoe_rport *frport = fcoe_ctlr_rport(new); | |
2308 | ||
2309 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2310 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2311 | return; | |
2312 | } | |
2313 | switch (fip->state) { | |
2314 | case FIP_ST_VNMP_START: | |
2315 | case FIP_ST_VNMP_PROBE1: | |
2316 | case FIP_ST_VNMP_PROBE2: | |
2317 | if (new->ids.port_id == fip->port_id) | |
2318 | fcoe_ctlr_vn_restart(fip); | |
2319 | break; | |
2320 | case FIP_ST_VNMP_CLAIM: | |
2321 | case FIP_ST_VNMP_UP: | |
2322 | if (new->ids.port_id == fip->port_id) { | |
2323 | if (new->ids.port_name > fip->lp->wwpn) { | |
2324 | fcoe_ctlr_vn_restart(fip); | |
2325 | break; | |
2326 | } | |
2327 | fcoe_ctlr_vn_send_claim(fip); | |
2328 | break; | |
2329 | } | |
2330 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac, | |
2331 | min((u32)frport->fcoe_len, | |
2332 | fcoe_ctlr_fcoe_size(fip))); | |
2333 | fcoe_ctlr_vn_add(fip, new); | |
2334 | break; | |
2335 | default: | |
2336 | break; | |
2337 | } | |
2338 | } | |
2339 | ||
2340 | /** | |
2341 | * fcoe_ctlr_vn_claim_resp() - handle received Claim Response | |
2342 | * @fip: The FCoE controller that received the frame | |
2343 | * @new: newly-parsed remote port with frport from the Claim Response | |
2344 | * | |
2345 | * Called with ctlr_mutex held. | |
2346 | */ | |
2347 | static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip, | |
2348 | struct fc_rport_priv *new) | |
2349 | { | |
2350 | LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n", | |
2351 | new->ids.port_id, fcoe_ctlr_state(fip->state)); | |
2352 | if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM) | |
2353 | fcoe_ctlr_vn_add(fip, new); | |
2354 | } | |
2355 | ||
2356 | /** | |
2357 | * fcoe_ctlr_vn_beacon() - handle received beacon. | |
2358 | * @fip: The FCoE controller that received the frame | |
2359 | * @new: newly-parsed remote port with frport from the Beacon | |
2360 | * | |
2361 | * Called with ctlr_mutex held. | |
2362 | */ | |
2363 | static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip, | |
2364 | struct fc_rport_priv *new) | |
2365 | { | |
2366 | struct fc_lport *lport = fip->lp; | |
2367 | struct fc_rport_priv *rdata; | |
2368 | struct fcoe_rport *frport; | |
2369 | ||
2370 | frport = fcoe_ctlr_rport(new); | |
2371 | if (frport->flags & FIP_FL_REC_OR_P2P) { | |
2372 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2373 | return; | |
2374 | } | |
2375 | mutex_lock(&lport->disc.disc_mutex); | |
2376 | rdata = lport->tt.rport_lookup(lport, new->ids.port_id); | |
2377 | if (rdata) | |
2378 | kref_get(&rdata->kref); | |
2379 | mutex_unlock(&lport->disc.disc_mutex); | |
2380 | if (rdata) { | |
2381 | if (rdata->ids.node_name == new->ids.node_name && | |
2382 | rdata->ids.port_name == new->ids.port_name) { | |
2383 | frport = fcoe_ctlr_rport(rdata); | |
2384 | if (!frport->time && fip->state == FIP_ST_VNMP_UP) | |
2385 | lport->tt.rport_login(rdata); | |
2386 | frport->time = jiffies; | |
2387 | } | |
2388 | kref_put(&rdata->kref, lport->tt.rport_destroy); | |
2389 | return; | |
2390 | } | |
2391 | if (fip->state != FIP_ST_VNMP_UP) | |
2392 | return; | |
2393 | ||
2394 | /* | |
2395 | * Beacon from a new neighbor. | |
2396 | * Send a claim notify if one hasn't been sent recently. | |
2397 | * Don't add the neighbor yet. | |
2398 | */ | |
2399 | LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n", | |
2400 | new->ids.port_id); | |
2401 | if (time_after(jiffies, | |
2402 | fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT))) | |
2403 | fcoe_ctlr_vn_send_claim(fip); | |
2404 | } | |
2405 | ||
2406 | /** | |
2407 | * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons | |
2408 | * @fip: The FCoE controller | |
2409 | * | |
2410 | * Called with ctlr_mutex held. | |
2411 | * Called only in state FIP_ST_VNMP_UP. | |
2412 | * Returns the soonest time for next age-out or a time far in the future. | |
2413 | */ | |
2414 | static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip) | |
2415 | { | |
2416 | struct fc_lport *lport = fip->lp; | |
2417 | struct fc_rport_priv *rdata; | |
2418 | struct fcoe_rport *frport; | |
2419 | unsigned long next_time; | |
2420 | unsigned long deadline; | |
2421 | ||
2422 | next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10); | |
2423 | mutex_lock(&lport->disc.disc_mutex); | |
2424 | list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) { | |
2425 | frport = fcoe_ctlr_rport(rdata); | |
2426 | if (!frport->time) | |
2427 | continue; | |
2428 | deadline = frport->time + | |
2429 | msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10); | |
2430 | if (time_after_eq(jiffies, deadline)) { | |
2431 | frport->time = 0; | |
2432 | LIBFCOE_FIP_DBG(fip, | |
2433 | "port %16.16llx fc_id %6.6x beacon expired\n", | |
2434 | rdata->ids.port_name, rdata->ids.port_id); | |
2435 | lport->tt.rport_logoff(rdata); | |
2436 | } else if (time_before(deadline, next_time)) | |
2437 | next_time = deadline; | |
2438 | } | |
2439 | mutex_unlock(&lport->disc.disc_mutex); | |
2440 | return next_time; | |
2441 | } | |
2442 | ||
2443 | /** | |
2444 | * fcoe_ctlr_vn_recv() - Receive a FIP frame | |
2445 | * @fip: The FCoE controller that received the frame | |
2446 | * @skb: The received FIP frame | |
2447 | * | |
2448 | * Returns non-zero if the frame is dropped. | |
2449 | * Always consumes the frame. | |
2450 | */ | |
2451 | static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb) | |
2452 | { | |
2453 | struct fip_header *fiph; | |
2454 | enum fip_vn2vn_subcode sub; | |
2dc02ee5 | 2455 | struct { |
e10f8c66 JE |
2456 | struct fc_rport_priv rdata; |
2457 | struct fcoe_rport frport; | |
2458 | } buf; | |
2459 | int rc; | |
2460 | ||
2461 | fiph = (struct fip_header *)skb->data; | |
2462 | sub = fiph->fip_subcode; | |
2463 | ||
2464 | rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata); | |
2465 | if (rc) { | |
2466 | LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc); | |
2467 | goto drop; | |
2468 | } | |
2469 | ||
2470 | mutex_lock(&fip->ctlr_mutex); | |
2471 | switch (sub) { | |
2472 | case FIP_SC_VN_PROBE_REQ: | |
2473 | fcoe_ctlr_vn_probe_req(fip, &buf.rdata); | |
2474 | break; | |
2475 | case FIP_SC_VN_PROBE_REP: | |
2476 | fcoe_ctlr_vn_probe_reply(fip, &buf.rdata); | |
2477 | break; | |
2478 | case FIP_SC_VN_CLAIM_NOTIFY: | |
2479 | fcoe_ctlr_vn_claim_notify(fip, &buf.rdata); | |
2480 | break; | |
2481 | case FIP_SC_VN_CLAIM_REP: | |
2482 | fcoe_ctlr_vn_claim_resp(fip, &buf.rdata); | |
2483 | break; | |
2484 | case FIP_SC_VN_BEACON: | |
2485 | fcoe_ctlr_vn_beacon(fip, &buf.rdata); | |
2486 | break; | |
2487 | default: | |
2488 | LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub); | |
2489 | rc = -1; | |
2490 | break; | |
2491 | } | |
2492 | mutex_unlock(&fip->ctlr_mutex); | |
2493 | drop: | |
2494 | kfree_skb(skb); | |
2495 | return rc; | |
2496 | } | |
2497 | ||
2498 | /** | |
2499 | * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode. | |
92261156 JE |
2500 | * @lport: The local port |
2501 | * @fp: The received frame | |
e10f8c66 JE |
2502 | * |
2503 | * This should never be called since we don't see RSCNs or other | |
2504 | * fabric-generated ELSes. | |
2505 | */ | |
92261156 | 2506 | static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp) |
e10f8c66 JE |
2507 | { |
2508 | struct fc_seq_els_data rjt_data; | |
2509 | ||
e10f8c66 JE |
2510 | rjt_data.reason = ELS_RJT_UNSUP; |
2511 | rjt_data.explan = ELS_EXPL_NONE; | |
92261156 | 2512 | lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data); |
e10f8c66 JE |
2513 | fc_frame_free(fp); |
2514 | } | |
2515 | ||
2516 | /** | |
2517 | * fcoe_ctlr_disc_recv - start discovery for VN2VN mode. | |
2518 | * @fip: The FCoE controller | |
2519 | * | |
2520 | * This sets a flag indicating that remote ports should be created | |
2521 | * and started for the peers we discover. We use the disc_callback | |
2522 | * pointer as that flag. Peers already discovered are created here. | |
2523 | * | |
2524 | * The lport lock is held during this call. The callback must be done | |
2525 | * later, without holding either the lport or discovery locks. | |
2526 | * The fcoe_ctlr lock may also be held during this call. | |
2527 | */ | |
2528 | static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *, | |
2529 | enum fc_disc_event), | |
2530 | struct fc_lport *lport) | |
2531 | { | |
2532 | struct fc_disc *disc = &lport->disc; | |
2533 | struct fcoe_ctlr *fip = disc->priv; | |
2534 | ||
2535 | mutex_lock(&disc->disc_mutex); | |
2536 | disc->disc_callback = callback; | |
2537 | disc->disc_id = (disc->disc_id + 2) | 1; | |
2538 | disc->pending = 1; | |
2539 | schedule_work(&fip->timer_work); | |
2540 | mutex_unlock(&disc->disc_mutex); | |
2541 | } | |
2542 | ||
2543 | /** | |
2544 | * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state. | |
2545 | * @fip: The FCoE controller | |
2546 | * | |
2547 | * Starts the FLOGI and PLOGI login process to each discovered rport for which | |
2548 | * we've received at least one beacon. | |
2549 | * Performs the discovery complete callback. | |
2550 | */ | |
2551 | static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip) | |
2552 | { | |
2553 | struct fc_lport *lport = fip->lp; | |
2554 | struct fc_disc *disc = &lport->disc; | |
2555 | struct fc_rport_priv *rdata; | |
2556 | struct fcoe_rport *frport; | |
2557 | void (*callback)(struct fc_lport *, enum fc_disc_event); | |
2558 | ||
2559 | mutex_lock(&disc->disc_mutex); | |
2560 | callback = disc->pending ? disc->disc_callback : NULL; | |
2561 | disc->pending = 0; | |
2562 | list_for_each_entry_rcu(rdata, &disc->rports, peers) { | |
2563 | frport = fcoe_ctlr_rport(rdata); | |
2564 | if (frport->time) | |
2565 | lport->tt.rport_login(rdata); | |
2566 | } | |
2567 | mutex_unlock(&disc->disc_mutex); | |
2568 | if (callback) | |
2569 | callback(lport, DISC_EV_SUCCESS); | |
2570 | } | |
2571 | ||
2572 | /** | |
2573 | * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode. | |
2574 | * @fip: The FCoE controller | |
2575 | */ | |
2576 | static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip) | |
2577 | { | |
2578 | unsigned long next_time; | |
2579 | u8 mac[ETH_ALEN]; | |
2580 | u32 new_port_id = 0; | |
2581 | ||
2582 | mutex_lock(&fip->ctlr_mutex); | |
2583 | switch (fip->state) { | |
2584 | case FIP_ST_VNMP_START: | |
2585 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1); | |
2586 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2587 | next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT); | |
2588 | break; | |
2589 | case FIP_ST_VNMP_PROBE1: | |
2590 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2); | |
2591 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0); | |
2592 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2593 | break; | |
2594 | case FIP_ST_VNMP_PROBE2: | |
2595 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM); | |
2596 | new_port_id = fip->port_id; | |
2597 | hton24(mac, FIP_VN_FC_MAP); | |
2598 | hton24(mac + 3, new_port_id); | |
cd229e42 | 2599 | fcoe_ctlr_map_dest(fip); |
e10f8c66 JE |
2600 | fip->update_mac(fip->lp, mac); |
2601 | fcoe_ctlr_vn_send_claim(fip); | |
2602 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2603 | break; | |
2604 | case FIP_ST_VNMP_CLAIM: | |
2605 | /* | |
2606 | * This may be invoked either by starting discovery so don't | |
2607 | * go to the next state unless it's been long enough. | |
2608 | */ | |
2609 | next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2610 | if (time_after_eq(jiffies, next_time)) { | |
2611 | fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP); | |
2612 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2613 | fcoe_all_vn2vn, 0); | |
2614 | next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT); | |
2615 | fip->port_ka_time = next_time; | |
2616 | } | |
2617 | fcoe_ctlr_vn_disc(fip); | |
2618 | break; | |
2619 | case FIP_ST_VNMP_UP: | |
2620 | next_time = fcoe_ctlr_vn_age(fip); | |
2621 | if (time_after_eq(jiffies, fip->port_ka_time)) { | |
2622 | fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON, | |
2623 | fcoe_all_vn2vn, 0); | |
2624 | fip->port_ka_time = jiffies + | |
2625 | msecs_to_jiffies(FIP_VN_BEACON_INT + | |
2626 | (random32() % FIP_VN_BEACON_FUZZ)); | |
2627 | } | |
2628 | if (time_before(fip->port_ka_time, next_time)) | |
2629 | next_time = fip->port_ka_time; | |
2630 | break; | |
2631 | case FIP_ST_LINK_WAIT: | |
2632 | goto unlock; | |
2633 | default: | |
11aa9900 | 2634 | WARN(1, "unexpected state %d\n", fip->state); |
e10f8c66 JE |
2635 | goto unlock; |
2636 | } | |
2637 | mod_timer(&fip->timer, next_time); | |
2638 | unlock: | |
2639 | mutex_unlock(&fip->ctlr_mutex); | |
2640 | ||
2641 | /* If port ID is new, notify local port after dropping ctlr_mutex */ | |
2642 | if (new_port_id) | |
2643 | fc_lport_set_local_id(fip->lp, new_port_id); | |
2644 | } | |
2645 | ||
5e80f7f7 | 2646 | /** |
70b51aab RL |
2647 | * fcoe_libfc_config() - Sets up libfc related properties for local port |
2648 | * @lp: The local port to configure libfc for | |
e10f8c66 | 2649 | * @fip: The FCoE controller in use by the local port |
70b51aab | 2650 | * @tt: The libfc function template |
e10f8c66 | 2651 | * @init_fcp: If non-zero, the FCP portion of libfc should be initialized |
5e80f7f7 VD |
2652 | * |
2653 | * Returns : 0 for success | |
2654 | */ | |
e10f8c66 JE |
2655 | int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip, |
2656 | const struct libfc_function_template *tt, int init_fcp) | |
5e80f7f7 VD |
2657 | { |
2658 | /* Set the function pointers set by the LLDD */ | |
70b51aab | 2659 | memcpy(&lport->tt, tt, sizeof(*tt)); |
e10f8c66 | 2660 | if (init_fcp && fc_fcp_init(lport)) |
5e80f7f7 | 2661 | return -ENOMEM; |
70b51aab RL |
2662 | fc_exch_init(lport); |
2663 | fc_elsct_init(lport); | |
2664 | fc_lport_init(lport); | |
e10f8c66 JE |
2665 | if (fip->mode == FIP_MODE_VN2VN) |
2666 | lport->rport_priv_size = sizeof(struct fcoe_rport); | |
70b51aab | 2667 | fc_rport_init(lport); |
e10f8c66 JE |
2668 | if (fip->mode == FIP_MODE_VN2VN) { |
2669 | lport->point_to_multipoint = 1; | |
2670 | lport->tt.disc_recv_req = fcoe_ctlr_disc_recv; | |
2671 | lport->tt.disc_start = fcoe_ctlr_disc_start; | |
2672 | lport->tt.disc_stop = fcoe_ctlr_disc_stop; | |
2673 | lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final; | |
2674 | mutex_init(&lport->disc.disc_mutex); | |
2675 | INIT_LIST_HEAD(&lport->disc.rports); | |
2676 | lport->disc.priv = fip; | |
2677 | } else { | |
2678 | fc_disc_init(lport); | |
2679 | } | |
5e80f7f7 VD |
2680 | return 0; |
2681 | } | |
2682 | EXPORT_SYMBOL_GPL(fcoe_libfc_config); |