IPVS: fix netns if reading ip_vs_* procfs entries
[linux-2.6/linux-mips.git] / drivers / scsi / fcoe / fcoe_ctlr.c
blob9d38be2a41f975fcdbd7a572388b6b7c03f4a2d9
1 /*
2 * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2009 Intel Corporation. All rights reserved.
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.
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.
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.
18 * Maintained at www.Open-FCoE.org
21 #include <linux/types.h>
22 #include <linux/module.h>
23 #include <linux/kernel.h>
24 #include <linux/list.h>
25 #include <linux/spinlock.h>
26 #include <linux/timer.h>
27 #include <linux/netdevice.h>
28 #include <linux/etherdevice.h>
29 #include <linux/ethtool.h>
30 #include <linux/if_ether.h>
31 #include <linux/if_vlan.h>
32 #include <linux/errno.h>
33 #include <linux/bitops.h>
34 #include <linux/slab.h>
35 #include <net/rtnetlink.h>
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>
42 #include <scsi/fc/fc_fcp.h>
44 #include <scsi/libfc.h>
45 #include <scsi/libfcoe.h>
47 #include "libfcoe.h"
49 #define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
50 #define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
52 static void fcoe_ctlr_timeout(unsigned long);
53 static void fcoe_ctlr_timer_work(struct work_struct *);
54 static void fcoe_ctlr_recv_work(struct work_struct *);
55 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
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 *);
62 static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
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;
67 static const char * const fcoe_ctlr_states[] = {
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",
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",
80 static const char *fcoe_ctlr_state(enum fip_state state)
82 const char *cp = "unknown";
84 if (state < ARRAY_SIZE(fcoe_ctlr_states))
85 cp = fcoe_ctlr_states[state];
86 if (!cp)
87 cp = "unknown";
88 return cp;
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
96 static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
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;
107 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
108 * @fcf: The FCF to check
110 * Return non-zero if FCF fcoe_size has been validated.
112 static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
114 return (fcf->flags & FIP_FL_SOL) != 0;
118 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
119 * @fcf: The FCF to check
121 * Return non-zero if the FCF is usable.
123 static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
125 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
127 return (fcf->flags & flags) == flags;
131 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
132 * @fip: The FCoE controller
134 static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
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;
145 * fcoe_ctlr_init() - Initialize the FCoE Controller instance
146 * @fip: The FCoE controller to initialize
148 void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
150 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
151 fip->mode = mode;
152 INIT_LIST_HEAD(&fip->fcfs);
153 mutex_init(&fip->ctlr_mutex);
154 spin_lock_init(&fip->ctlr_lock);
155 fip->flogi_oxid = FC_XID_UNKNOWN;
156 setup_timer(&fip->timer, fcoe_ctlr_timeout, (unsigned long)fip);
157 INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
158 INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
159 skb_queue_head_init(&fip->fip_recv_list);
161 EXPORT_SYMBOL(fcoe_ctlr_init);
164 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
165 * @fip: The FCoE controller whose FCFs are to be reset
167 * Called with &fcoe_ctlr lock held.
169 static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
171 struct fcoe_fcf *fcf;
172 struct fcoe_fcf *next;
174 fip->sel_fcf = NULL;
175 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
176 list_del(&fcf->list);
177 kfree(fcf);
179 fip->fcf_count = 0;
180 fip->sel_time = 0;
184 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
185 * @fip: The FCoE controller to tear down
187 * This is called by FCoE drivers before freeing the &fcoe_ctlr.
189 * The receive handler will have been deleted before this to guarantee
190 * that no more recv_work will be scheduled.
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.
195 void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
197 cancel_work_sync(&fip->recv_work);
198 skb_queue_purge(&fip->fip_recv_list);
200 mutex_lock(&fip->ctlr_mutex);
201 fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
202 fcoe_ctlr_reset_fcfs(fip);
203 mutex_unlock(&fip->ctlr_mutex);
204 del_timer_sync(&fip->timer);
205 cancel_work_sync(&fip->timer_work);
207 EXPORT_SYMBOL(fcoe_ctlr_destroy);
210 * fcoe_ctlr_announce() - announce new FCF selection
211 * @fip: The FCoE controller
213 * Also sets the destination MAC for FCoE and control packets
215 * Called with neither ctlr_mutex nor ctlr_lock held.
217 static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
219 struct fcoe_fcf *sel;
220 struct fcoe_fcf *fcf;
222 mutex_lock(&fip->ctlr_mutex);
223 spin_lock_bh(&fip->ctlr_lock);
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;
230 spin_unlock_bh(&fip->ctlr_lock);
231 sel = fip->sel_fcf;
233 if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr))
234 goto unlock;
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);
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;
248 unlock:
249 mutex_unlock(&fip->ctlr_mutex);
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
256 * Returns the maximum packet size including the FCoE header and trailer,
257 * but not including any Ethernet or VLAN headers.
259 static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
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.
266 return fip->lp->mfs + sizeof(struct fc_frame_header) +
267 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
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)
275 static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
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;
285 } __packed desc;
286 } __packed * sol;
287 u32 fcoe_size;
289 skb = dev_alloc_skb(sizeof(*sol));
290 if (!skb)
291 return;
293 sol = (struct fip_sol *)skb->data;
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);
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);
305 if (fip->spma)
306 sol->fip.fip_flags |= htons(FIP_FL_SPMA);
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);
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);
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);
321 skb_put(skb, sizeof(*sol));
322 skb->protocol = htons(ETH_P_FIP);
323 skb_reset_mac_header(skb);
324 skb_reset_network_header(skb);
325 fip->send(fip, skb);
327 if (!fcf)
328 fip->sol_time = jiffies;
332 * fcoe_ctlr_link_up() - Start FCoE controller
333 * @fip: The FCoE controller to start
335 * Called from the LLD when the network link is ready.
337 void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
339 mutex_lock(&fip->ctlr_mutex);
340 if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
341 mutex_unlock(&fip->ctlr_mutex);
342 fc_linkup(fip->lp);
343 } else if (fip->state == FIP_ST_LINK_WAIT) {
344 fcoe_ctlr_set_state(fip, fip->mode);
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:
350 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
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;
364 } else
365 mutex_unlock(&fip->ctlr_mutex);
367 EXPORT_SYMBOL(fcoe_ctlr_link_up);
370 * fcoe_ctlr_reset() - Reset a FCoE controller
371 * @fip: The FCoE controller to reset
373 static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
375 fcoe_ctlr_reset_fcfs(fip);
376 del_timer(&fip->timer);
377 fip->ctlr_ka_time = 0;
378 fip->port_ka_time = 0;
379 fip->sol_time = 0;
380 fip->flogi_oxid = FC_XID_UNKNOWN;
381 fcoe_ctlr_map_dest(fip);
385 * fcoe_ctlr_link_down() - Stop a FCoE controller
386 * @fip: The FCoE controller to be stopped
388 * Returns non-zero if the link was up and now isn't.
390 * Called from the LLD when the network link is not ready.
391 * There may be multiple calls while the link is down.
393 int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
395 int link_dropped;
397 LIBFCOE_FIP_DBG(fip, "link down.\n");
398 mutex_lock(&fip->ctlr_mutex);
399 fcoe_ctlr_reset(fip);
400 link_dropped = fip->state != FIP_ST_LINK_WAIT;
401 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
402 mutex_unlock(&fip->ctlr_mutex);
404 if (link_dropped)
405 fc_linkdown(fip->lp);
406 return link_dropped;
408 EXPORT_SYMBOL(fcoe_ctlr_link_down);
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
417 * A controller keep-alive is sent every fka_period (typically 8 seconds).
418 * The source MAC is the native MAC address.
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.
424 static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
425 struct fc_lport *lport,
426 int ports, u8 *sa)
428 struct sk_buff *skb;
429 struct fip_kal {
430 struct ethhdr eth;
431 struct fip_header fip;
432 struct fip_mac_desc mac;
433 } __packed * kal;
434 struct fip_vn_desc *vn;
435 u32 len;
436 struct fc_lport *lp;
437 struct fcoe_fcf *fcf;
439 fcf = fip->sel_fcf;
440 lp = fip->lp;
441 if (!fcf || (ports && !lp->port_id))
442 return;
444 len = sizeof(*kal) + ports * sizeof(*vn);
445 skb = dev_alloc_skb(len);
446 if (!skb)
447 return;
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);
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) +
459 ports * sizeof(*vn)) / FIP_BPW);
460 kal->fip.fip_flags = htons(FIP_FL_FPMA);
461 if (fip->spma)
462 kal->fip.fip_flags |= htons(FIP_FL_SPMA);
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);
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;
471 memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
472 hton24(vn->fd_fc_id, lport->port_id);
473 put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
475 skb_put(skb, len);
476 skb->protocol = htons(ETH_P_FIP);
477 skb_reset_mac_header(skb);
478 skb_reset_network_header(skb);
479 fip->send(fip, skb);
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
487 * @d_id: The destination port ID.
489 * Returns non-zero error code on failure.
491 * The caller must check that the length is a multiple of 4.
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.
497 static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
498 u8 dtype, struct sk_buff *skb, u32 d_id)
500 struct fip_encaps_head {
501 struct ethhdr eth;
502 struct fip_header fip;
503 struct fip_encaps encaps;
504 } __packed * cap;
505 struct fc_frame_header *fh;
506 struct fip_mac_desc *mac;
507 struct fcoe_fcf *fcf;
508 size_t dlen;
509 u16 fip_flags;
510 u8 op;
512 fh = (struct fc_frame_header *)skb->data;
513 op = *(u8 *)(fh + 1);
514 dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
515 cap = (struct fip_encaps_head *)skb_push(skb, sizeof(*cap));
516 memset(cap, 0, sizeof(*cap));
518 if (lport->point_to_multipoint) {
519 if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest))
520 return -ENODEV;
521 fip_flags = 0;
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);
533 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
534 cap->eth.h_proto = htons(ETH_P_FIP);
536 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
537 cap->fip.fip_op = htons(FIP_OP_LS);
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;
542 cap->fip.fip_flags = htons(fip_flags);
544 cap->encaps.fd_desc.fip_dtype = dtype;
545 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
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. */
566 cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
568 skb->protocol = htons(ETH_P_FIP);
569 skb_reset_mac_header(skb);
570 skb_reset_network_header(skb);
571 return 0;
575 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
576 * @fip: FCoE controller.
577 * @lport: libfc fc_lport to send from
578 * @skb: FCoE ELS frame including FC header but no FCoE headers.
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.
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).
585 * The the skb must also be an fc_frame.
587 * This is called from the lower-level driver with spinlocks held,
588 * so we must not take a mutex here.
590 int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
591 struct sk_buff *skb)
593 struct fc_frame *fp;
594 struct fc_frame_header *fh;
595 u16 old_xid;
596 u8 op;
597 u8 mac[ETH_ALEN];
599 fp = container_of(skb, struct fc_frame, skb);
600 fh = (struct fc_frame_header *)skb->data;
601 op = *(u8 *)(fh + 1);
603 if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) {
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;
612 fcoe_ctlr_map_dest(fip);
613 return 0;
615 if (fip->state == FIP_ST_NON_FIP)
616 fcoe_ctlr_map_dest(fip);
619 if (fip->state == FIP_ST_NON_FIP)
620 return 0;
621 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
622 goto drop;
623 switch (op) {
624 case ELS_FLOGI:
625 op = FIP_DT_FLOGI;
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;
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:
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;
652 op = FIP_DT_LOGO;
653 break;
654 case ELS_LS_ACC:
656 * If non-FIP, we may have gotten an SID by accepting an FLOGI
657 * from a point-to-point connection. Switch to using
658 * the source mac based on the SID. The destination
659 * MAC in this case would have been set by receiving the
660 * FLOGI.
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);
669 /* fall through */
670 case ELS_LS_RJT:
671 op = fr_encaps(fp);
672 if (op)
673 break;
674 return 0;
675 default:
676 if (fip->state != FIP_ST_ENABLED &&
677 fip->state != FIP_ST_VNMP_UP)
678 goto drop;
679 return 0;
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)))
684 goto drop;
685 fip->send(fip, skb);
686 return -EINPROGRESS;
687 drop:
688 kfree_skb(skb);
689 return -EINVAL;
691 EXPORT_SYMBOL(fcoe_ctlr_els_send);
694 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
695 * @fip: The FCoE controller to free FCFs on
697 * Called with lock held and preemption disabled.
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.
703 * In addition, determine the time when an FCF selection can occur.
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).
708 * Returns the time in jiffies for the next call.
710 static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
712 struct fcoe_fcf *fcf;
713 struct fcoe_fcf *next;
714 unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
715 unsigned long deadline;
716 unsigned long sel_time = 0;
717 struct fcoe_dev_stats *stats;
719 stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu());
721 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
722 deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
723 if (fip->sel_fcf == fcf) {
724 if (time_after(jiffies, deadline)) {
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;
735 deadline += fcf->fka_period;
736 if (time_after_eq(jiffies, deadline)) {
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);
743 stats->VLinkFailureCount++;
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;
752 put_cpu();
753 if (sel_time && !fip->sel_fcf && !fip->sel_time) {
754 sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
755 fip->sel_time = sel_time;
758 return next_timer;
762 * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
763 * @fip: The FCoE controller receiving the advertisement
764 * @skb: The received FIP advertisement frame
765 * @fcf: The resulting FCF entry
767 * Returns zero on a valid parsed advertisement,
768 * otherwise returns non zero value.
770 static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
771 struct sk_buff *skb, struct fcoe_fcf *fcf)
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;
781 u32 desc_mask;
783 memset(fcf, 0, sizeof(*fcf));
784 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
786 fiph = (struct fip_header *)skb->data;
787 fcf->flags = ntohs(fiph->fip_flags);
790 * mask of required descriptors. validating each one clears its bit.
792 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
793 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
795 rlen = ntohs(fiph->fip_dl_len) * 4;
796 if (rlen + sizeof(*fiph) > skb->len)
797 return -EINVAL;
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;
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;
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;
816 desc_mask &= ~BIT(FIP_DT_PRI);
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)) {
825 LIBFCOE_FIP_DBG(fip,
826 "Invalid MAC addr %pM in FIP adv\n",
827 fcf->fcf_mac);
828 return -EINVAL;
830 desc_mask &= ~BIT(FIP_DT_MAC);
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);
837 desc_mask &= ~BIT(FIP_DT_NAME);
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);
846 desc_mask &= ~BIT(FIP_DT_FAB);
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;
852 if (fka->fd_flags & FIP_FKA_ADV_D)
853 fcf->fd_flags = 1;
854 t = ntohl(fka->fd_fka_period);
855 if (t >= FCOE_CTLR_MIN_FKA)
856 fcf->fka_period = msecs_to_jiffies(t);
857 desc_mask &= ~BIT(FIP_DT_FKA);
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:
866 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
867 "in FIP adv\n", desc->fip_dtype);
868 /* standard says ignore unknown descriptors >= 128 */
869 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
870 return -EINVAL;
871 break;
873 desc = (struct fip_desc *)((char *)desc + dlen);
874 rlen -= dlen;
876 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
877 return -EINVAL;
878 if (!fcf->switch_name)
879 return -EINVAL;
880 if (desc_mask) {
881 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
882 desc_mask);
883 return -EINVAL;
885 return 0;
887 len_err:
888 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
889 desc->fip_dtype, dlen);
890 return -EINVAL;
894 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
895 * @fip: The FCoE controller receiving the advertisement
896 * @skb: The received FIP packet
898 static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
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;
907 if (fcoe_ctlr_parse_adv(fip, skb, &new))
908 return;
910 mutex_lock(&fip->ctlr_mutex);
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;
922 if (!found) {
923 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
924 goto out;
926 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
927 if (!fcf)
928 goto out;
930 fip->fcf_count++;
931 memcpy(fcf, &new, sizeof(new));
932 list_add(&fcf->list, &fip->fcfs);
933 } else {
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).
940 fcf->fd_flags = new.fd_flags;
941 if (!fcoe_ctlr_fcf_usable(fcf))
942 fcf->flags = new.flags;
944 if (fcf == fip->sel_fcf && !fcf->fd_flags) {
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);
950 fcf->fka_period = new.fka_period;
951 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
953 mtu_valid = fcoe_ctlr_mtu_valid(fcf);
954 fcf->time = jiffies;
955 if (!found)
956 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
957 fcf->fabric_name, fcf->fcf_mac);
960 * If this advertisement is not solicited and our max receive size
961 * hasn't been verified, send a solicited advertisement.
963 if (!mtu_valid)
964 fcoe_ctlr_solicit(fip, fcf);
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.
972 if (first && time_after(jiffies, fip->sol_time + sol_tov))
973 fcoe_ctlr_solicit(fip, NULL);
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.
981 if (mtu_valid) {
982 list_del(&fcf->list);
983 list_add(&fcf->list, &fip->fcfs);
987 * If this is the first validated FCF, note the time and
988 * set a timer to trigger selection.
990 if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) {
991 fip->sel_time = jiffies +
992 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
993 if (!timer_pending(&fip->timer) ||
994 time_before(fip->sel_time, fip->timer.expires))
995 mod_timer(&fip->timer, fip->sel_time);
997 out:
998 mutex_unlock(&fip->ctlr_mutex);
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
1006 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1008 struct fc_lport *lport = fip->lp;
1009 struct fip_header *fiph;
1010 struct fc_frame *fp = (struct fc_frame *)skb;
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;
1022 u32 desc_mask = 0;
1023 u32 desc_cnt = 0;
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;
1030 rlen = ntohs(fiph->fip_dl_len) * 4;
1031 if (rlen + sizeof(*fiph) > skb->len)
1032 goto drop;
1034 desc = (struct fip_desc *)(fiph + 1);
1035 while (rlen > 0) {
1036 desc_cnt++;
1037 dlen = desc->fip_dlen * FIP_BPW;
1038 if (dlen < sizeof(*desc) || dlen > rlen)
1039 goto drop;
1040 /* Drop ELS if there are duplicate critical descriptors */
1041 if (desc->fip_dtype < 32) {
1042 if (desc_mask & 1U << desc->fip_dtype) {
1043 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1044 "Descriptors in FIP ELS\n");
1045 goto drop;
1047 desc_mask |= (1 << desc->fip_dtype);
1049 switch (desc->fip_dtype) {
1050 case FIP_DT_MAC:
1051 if (desc_cnt == 1) {
1052 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1053 "received out of order\n");
1054 goto drop;
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);
1062 break;
1063 case FIP_DT_FLOGI:
1064 case FIP_DT_FDISC:
1065 case FIP_DT_LOGO:
1066 case FIP_DT_ELP:
1067 if (desc_cnt != 1) {
1068 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1069 "received out of order\n");
1070 goto drop;
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:
1082 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1083 "in FIP adv\n", desc->fip_dtype);
1084 /* standard says ignore unknown descriptors >= 128 */
1085 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1086 goto drop;
1087 if (desc_cnt <= 2) {
1088 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1089 "received out of order\n");
1090 goto drop;
1092 break;
1094 desc = (struct fip_desc *)((char *)desc + dlen);
1095 rlen -= dlen;
1098 if (!fh)
1099 goto drop;
1100 els_op = *(u8 *)(fh + 1);
1102 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
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;
1111 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
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);
1118 } else if (els_dtype == FIP_DT_FLOGI &&
1119 !fcoe_ctlr_flogi_retry(fip))
1120 goto drop; /* retrying FLOGI so drop reject */
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;
1131 * Convert skb into an fc_frame containing only the ELS.
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;
1139 fr_dev(fp) = lport;
1140 fr_encaps(fp) = els_dtype;
1142 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1143 stats->RxFrames++;
1144 stats->RxWords += skb->len / FIP_BPW;
1145 put_cpu();
1147 fc_exch_recv(lport, fp);
1148 return;
1150 len_err:
1151 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1152 desc->fip_dtype, dlen);
1153 drop:
1154 kfree_skb(skb);
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
1162 * There may be multiple VN_Port descriptors.
1163 * The overall length has already been checked.
1165 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1166 struct fip_header *fh)
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;
1175 struct fc_lport *lport = fip->lp;
1176 struct fc_lport *vn_port = NULL;
1177 u32 desc_mask;
1178 int is_vn_port = 0;
1180 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1182 if (!fcf || !lport->port_id)
1183 return;
1186 * mask of required descriptors. Validating each one clears its bit.
1188 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID);
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;
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;
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,
1225 fip->get_src_addr(lport)) == 0 &&
1226 get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn &&
1227 ntoh24(vp->fd_fc_id) == lport->port_id) {
1228 desc_mask &= ~BIT(FIP_DT_VN_ID);
1229 break;
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;
1245 mutex_unlock(&lport->lp_mutex);
1247 break;
1248 default:
1249 /* standard says ignore unknown descriptors >= 128 */
1250 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1251 return;
1252 break;
1254 desc = (struct fip_desc *)((char *)desc + dlen);
1255 rlen -= dlen;
1259 * reset only if all required descriptors were present and valid.
1261 if (desc_mask) {
1262 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1263 desc_mask);
1264 } else {
1265 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1267 if (is_vn_port)
1268 fc_lport_reset(vn_port);
1269 else {
1270 mutex_lock(&fip->ctlr_mutex);
1271 per_cpu_ptr(lport->dev_stats,
1272 get_cpu())->VLinkFailureCount++;
1273 put_cpu();
1274 fcoe_ctlr_reset(fip);
1275 mutex_unlock(&fip->ctlr_mutex);
1277 fc_lport_reset(fip->lp);
1278 fcoe_ctlr_solicit(fip, NULL);
1284 * fcoe_ctlr_recv() - Receive a FIP packet
1285 * @fip: The FCoE controller that received the packet
1286 * @skb: The received FIP packet
1288 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1290 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1292 skb_queue_tail(&fip->fip_recv_list, skb);
1293 schedule_work(&fip->recv_work);
1295 EXPORT_SYMBOL(fcoe_ctlr_recv);
1298 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1299 * @fip: The FCoE controller that received the frame
1300 * @skb: The received FIP frame
1302 * Returns non-zero if the frame is dropped.
1304 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1306 struct fip_header *fiph;
1307 struct ethhdr *eh;
1308 enum fip_state state;
1309 u16 op;
1310 u8 sub;
1312 if (skb_linearize(skb))
1313 goto drop;
1314 if (skb->len < sizeof(*fiph))
1315 goto drop;
1316 eh = eth_hdr(skb);
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))
1324 goto drop;
1325 fiph = (struct fip_header *)skb->data;
1326 op = ntohs(fiph->fip_op);
1327 sub = fiph->fip_subcode;
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;
1334 mutex_lock(&fip->ctlr_mutex);
1335 state = fip->state;
1336 if (state == FIP_ST_AUTO) {
1337 fip->map_dest = 0;
1338 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1339 state = FIP_ST_ENABLED;
1340 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1342 mutex_unlock(&fip->ctlr_mutex);
1344 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1345 return fcoe_ctlr_vn_recv(fip, skb);
1347 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1348 state != FIP_ST_VNMP_CLAIM)
1349 goto drop;
1351 if (op == FIP_OP_LS) {
1352 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1353 return 0;
1356 if (state != FIP_ST_ENABLED)
1357 goto drop;
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;
1371 * fcoe_ctlr_select() - Select the best FCF (if possible)
1372 * @fip: The FCoE controller
1374 * Returns the selected FCF, or NULL if none are usable.
1376 * If there are conflicting advertisements, no FCF can be chosen.
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.
1381 * Called with lock held.
1383 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1385 struct fcoe_fcf *fcf;
1386 struct fcoe_fcf *best = fip->sel_fcf;
1387 struct fcoe_fcf *first;
1389 first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list);
1391 list_for_each_entry(fcf, &fip->fcfs, list) {
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);
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;
1405 if (fcf->flogi_sent)
1406 continue;
1407 if (!fcoe_ctlr_fcf_usable(fcf)) {
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");
1414 continue;
1416 if (!best || fcf->pri < best->pri || best->flogi_sent)
1417 best = fcf;
1419 fip->sel_fcf = best;
1420 if (best) {
1421 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
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);
1428 return best;
1432 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1433 * @fip: The FCoE controller
1435 * Returns non-zero error if it could not be sent.
1437 * Called with ctlr_mutex and ctlr_lock held.
1438 * Caller must verify that fip->sel_fcf is not NULL.
1440 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1442 struct sk_buff *skb;
1443 struct sk_buff *skb_orig;
1444 struct fc_frame_header *fh;
1445 int error;
1447 skb_orig = fip->flogi_req;
1448 if (!skb_orig)
1449 return -EINVAL;
1452 * Clone and send the FLOGI request. If clone fails, use original.
1454 skb = skb_clone(skb_orig, GFP_ATOMIC);
1455 if (!skb) {
1456 skb = skb_orig;
1457 fip->flogi_req = NULL;
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;
1466 fip->send(fip, skb);
1467 fip->sel_fcf->flogi_sent = 1;
1468 return 0;
1472 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1473 * @fip: The FCoE controller
1475 * Returns non-zero error code if there's no FLOGI request to retry or
1476 * no alternate FCF available.
1478 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1480 struct fcoe_fcf *fcf;
1481 int error;
1483 mutex_lock(&fip->ctlr_mutex);
1484 spin_lock_bh(&fip->ctlr_lock);
1485 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1486 fcf = fcoe_ctlr_select(fip);
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);
1495 spin_unlock_bh(&fip->ctlr_lock);
1496 mutex_unlock(&fip->ctlr_mutex);
1497 return error;
1502 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1503 * @fip: The FCoE controller that timed out
1505 * Done here because fcoe_ctlr_els_send() can't get mutex.
1507 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1509 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1511 struct fcoe_fcf *fcf;
1513 spin_lock_bh(&fip->ctlr_lock);
1514 fcf = fip->sel_fcf;
1515 if (!fcf || !fip->flogi_req_send)
1516 goto unlock;
1518 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
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.
1524 if (fcf->flogi_sent) {
1525 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1526 fcf = fcoe_ctlr_select(fip);
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;
1531 fcf = fcoe_ctlr_select(fip);
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);
1544 * fcoe_ctlr_timeout() - FIP timeout handler
1545 * @arg: The FCoE controller that timed out
1547 static void fcoe_ctlr_timeout(unsigned long arg)
1549 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1551 schedule_work(&fip->timer_work);
1555 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1556 * @work: Handle to a FCoE controller
1558 * Ages FCFs. Triggers FCF selection if possible.
1559 * Sends keep-alives and resets.
1561 static void fcoe_ctlr_timer_work(struct work_struct *work)
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;
1569 struct fcoe_fcf *sel;
1570 struct fcoe_fcf *fcf;
1571 unsigned long next_timer;
1573 fip = container_of(work, struct fcoe_ctlr, timer_work);
1574 if (fip->mode == FIP_MODE_VN2VN)
1575 return fcoe_ctlr_vn_timeout(fip);
1576 mutex_lock(&fip->ctlr_mutex);
1577 if (fip->state == FIP_ST_DISABLED) {
1578 mutex_unlock(&fip->ctlr_mutex);
1579 return;
1582 fcf = fip->sel_fcf;
1583 next_timer = fcoe_ctlr_age_fcfs(fip);
1585 sel = fip->sel_fcf;
1586 if (!sel && fip->sel_time) {
1587 if (time_after_eq(jiffies, fip->sel_time)) {
1588 sel = fcoe_ctlr_select(fip);
1589 fip->sel_time = 0;
1590 } else if (time_after(next_timer, fip->sel_time))
1591 next_timer = fip->sel_time;
1594 if (sel && fip->flogi_req_send)
1595 fcoe_ctlr_flogi_send(fip);
1596 else if (!sel && fcf)
1597 reset = 1;
1599 if (sel && !sel->fd_flags) {
1600 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1601 fip->ctlr_ka_time = jiffies + sel->fka_period;
1602 send_ctlr_ka = 1;
1604 if (time_after(next_timer, fip->ctlr_ka_time))
1605 next_timer = fip->ctlr_ka_time;
1607 if (time_after_eq(jiffies, fip->port_ka_time)) {
1608 fip->port_ka_time = jiffies +
1609 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1610 send_port_ka = 1;
1612 if (time_after(next_timer, fip->port_ka_time))
1613 next_timer = fip->port_ka_time;
1615 if (!list_empty(&fip->fcfs))
1616 mod_timer(&fip->timer, next_timer);
1617 mutex_unlock(&fip->ctlr_mutex);
1619 if (reset) {
1620 fc_lport_reset(fip->lp);
1621 /* restart things with a solicitation */
1622 fcoe_ctlr_solicit(fip, NULL);
1625 if (send_ctlr_ka)
1626 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1628 if (send_port_ka) {
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);
1636 mutex_unlock(&fip->lp->lp_mutex);
1641 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1642 * @recv_work: Handle to a FCoE controller
1644 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1646 struct fcoe_ctlr *fip;
1647 struct sk_buff *skb;
1649 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1650 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1651 fcoe_ctlr_recv_handler(fip, skb);
1655 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1656 * @fip: The FCoE controller
1657 * @fp: The FC frame to snoop
1659 * Snoop potential response to FLOGI or even incoming FLOGI.
1661 * The caller has checked that we are waiting for login as indicated
1662 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1664 * The caller is responsible for freeing the frame.
1665 * Fill in the granted_mac address.
1667 * Return non-zero if the frame should not be delivered to libfc.
1669 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1670 struct fc_frame *fp)
1672 struct fc_frame_header *fh;
1673 u8 op;
1674 u8 *sa;
1676 sa = eth_hdr(&fp->skb)->h_source;
1677 fh = fc_frame_header_get(fp);
1678 if (fh->fh_type != FC_TYPE_ELS)
1679 return 0;
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)) {
1685 mutex_lock(&fip->ctlr_mutex);
1686 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1687 mutex_unlock(&fip->ctlr_mutex);
1688 return -EINVAL;
1690 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1691 LIBFCOE_FIP_DBG(fip,
1692 "received FLOGI LS_ACC using non-FIP mode\n");
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
1700 if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1701 fcoe_ctlr_map_dest(fip);
1702 } else {
1703 memcpy(fip->dest_addr, sa, ETH_ALEN);
1704 fip->map_dest = 0;
1706 fip->flogi_oxid = FC_XID_UNKNOWN;
1707 mutex_unlock(&fip->ctlr_mutex);
1708 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1709 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1711 * Save source MAC for point-to-point responses.
1713 mutex_lock(&fip->ctlr_mutex);
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;
1717 if (fip->state == FIP_ST_AUTO)
1718 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1719 "Setting non-FIP mode\n");
1720 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1722 mutex_unlock(&fip->ctlr_mutex);
1724 return 0;
1726 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
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
1734 * Returns: u64 fc world wide name
1736 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1737 unsigned int scheme, unsigned int port)
1739 u64 wwn;
1740 u64 host_mac;
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];
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;
1765 return wwn;
1767 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1770 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1771 * @rdata: libfc remote port
1773 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1775 return (struct fcoe_rport *)(rdata + 1);
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
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)
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;
1796 } __packed * frame;
1797 struct fip_fc4_feat *ff;
1798 struct fip_size_desc *size;
1799 u32 fcp_feat;
1800 size_t len;
1801 size_t dlen;
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;
1810 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
1811 len = max(len, min_len + sizeof(struct ethhdr));
1813 skb = dev_alloc_skb(len);
1814 if (!skb)
1815 return;
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);
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);
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);
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);
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);
1844 * For claims, add FC-4 features.
1845 * TBD: Add interface to get fc-4 types and features from libfc.
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;
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);
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));
1867 skb_put(skb, len);
1868 skb->protocol = htons(ETH_P_FIP);
1869 skb_reset_mac_header(skb);
1870 skb_reset_network_header(skb);
1872 fip->send(fip, skb);
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
1879 * @event: The event that occurred
1881 * Locking Note: The rport lock must not be held when calling this function.
1883 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
1884 struct fc_rport_priv *rdata,
1885 enum fc_rport_event event)
1887 struct fcoe_ctlr *fip = lport->disc.priv;
1888 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
1890 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
1891 rdata->ids.port_id, event);
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);
1908 break;
1909 default:
1910 break;
1912 mutex_unlock(&fip->ctlr_mutex);
1915 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
1916 .event_callback = fcoe_ctlr_vn_rport_callback,
1920 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
1921 * @fip: The FCoE controller
1923 * Called with ctlr_mutex held.
1925 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
1927 mutex_lock(&lport->disc.disc_mutex);
1928 lport->disc.disc_callback = NULL;
1929 mutex_unlock(&lport->disc.disc_mutex);
1933 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
1934 * @fip: The FCoE controller
1936 * Called through the local port template for discovery.
1937 * Called without the ctlr_mutex held.
1939 static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
1941 struct fcoe_ctlr *fip = lport->disc.priv;
1943 mutex_lock(&fip->ctlr_mutex);
1944 fcoe_ctlr_disc_stop_locked(lport);
1945 mutex_unlock(&fip->ctlr_mutex);
1949 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
1950 * @fip: The FCoE controller
1952 * Called through the local port template for discovery.
1953 * Called without the ctlr_mutex held.
1955 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
1957 fcoe_ctlr_disc_stop(lport);
1958 lport->tt.rport_flush_queue();
1959 synchronize_rcu();
1963 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
1964 * @fip: The FCoE controller
1966 * Called with fcoe_ctlr lock held.
1968 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
1970 unsigned long wait;
1971 u32 port_id;
1973 fcoe_ctlr_disc_stop_locked(fip->lp);
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.
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;
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);
2001 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2002 * @fip: The FCoE controller
2004 * Called with fcoe_ctlr lock held.
2006 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2008 fip->probe_tries = 0;
2009 prandom32_seed(&fip->rnd_state, fip->lp->wwpn);
2010 fcoe_ctlr_vn_restart(fip);
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
2019 * Returns non-zero error number on error.
2020 * Does not consume the packet.
2022 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2023 struct sk_buff *skb,
2024 struct fc_rport_priv *rdata)
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;
2039 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2040 frport = fcoe_ctlr_rport(rdata);
2042 fiph = (struct fip_header *)skb->data;
2043 frport->flags = ntohs(fiph->fip_flags);
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;
2064 rlen = ntohs(fiph->fip_dl_len) * 4;
2065 if (rlen + sizeof(*fiph) > skb->len)
2066 return -EINVAL;
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;
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;
2084 desc_mask &= ~BIT(dtype);
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;
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;
2132 desc = (struct fip_desc *)((char *)desc + dlen);
2133 rlen -= dlen;
2135 return 0;
2137 len_err:
2138 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2139 dtype, dlen);
2140 return -EINVAL;
2144 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2145 * @fip: The FCoE controller
2147 * Called with ctlr_mutex held.
2149 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2151 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2152 fip->sol_time = jiffies;
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
2160 * Called with ctlr_mutex held.
2162 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2163 struct fc_rport_priv *rdata)
2165 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2167 if (rdata->ids.port_id != fip->port_id)
2168 return;
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:
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.
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;
2191 /* fall through */
2192 case FIP_ST_VNMP_START:
2193 fcoe_ctlr_vn_restart(fip);
2194 break;
2195 default:
2196 break;
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
2205 * Called with ctlr_mutex held.
2207 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2208 struct fc_rport_priv *rdata)
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;
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
2232 * Called with ctlr_mutex held.
2234 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
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;
2242 port_id = new->ids.port_id;
2243 if (port_id == fip->port_id)
2244 return;
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;
2253 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2254 rdata->disc_id = lport->disc.disc_id;
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);
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;
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.
2277 * Returns non-zero error if no remote port found.
2279 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2281 struct fc_lport *lport = fip->lp;
2282 struct fc_rport_priv *rdata;
2283 struct fcoe_rport *frport;
2284 int ret = -1;
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;
2293 rcu_read_unlock();
2294 return ret;
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
2302 * Called with ctlr_mutex held.
2304 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2305 struct fc_rport_priv *new)
2307 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
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;
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;
2327 fcoe_ctlr_vn_send_claim(fip);
2328 break;
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;
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
2345 * Called with ctlr_mutex held.
2347 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2348 struct fc_rport_priv *new)
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);
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
2361 * Called with ctlr_mutex held.
2363 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2364 struct fc_rport_priv *new)
2366 struct fc_lport *lport = fip->lp;
2367 struct fc_rport_priv *rdata;
2368 struct fcoe_rport *frport;
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;
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;
2388 kref_put(&rdata->kref, lport->tt.rport_destroy);
2389 return;
2391 if (fip->state != FIP_ST_VNMP_UP)
2392 return;
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.
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);
2407 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2408 * @fip: The FCoE controller
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.
2414 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
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;
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;
2439 mutex_unlock(&lport->disc.disc_mutex);
2440 return next_time;
2444 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2445 * @fip: The FCoE controller that received the frame
2446 * @skb: The received FIP frame
2448 * Returns non-zero if the frame is dropped.
2449 * Always consumes the frame.
2451 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2453 struct fip_header *fiph;
2454 enum fip_vn2vn_subcode sub;
2455 struct {
2456 struct fc_rport_priv rdata;
2457 struct fcoe_rport frport;
2458 } buf;
2459 int rc;
2461 fiph = (struct fip_header *)skb->data;
2462 sub = fiph->fip_subcode;
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;
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;
2492 mutex_unlock(&fip->ctlr_mutex);
2493 drop:
2494 kfree_skb(skb);
2495 return rc;
2499 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2500 * @lport: The local port
2501 * @fp: The received frame
2503 * This should never be called since we don't see RSCNs or other
2504 * fabric-generated ELSes.
2506 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2508 struct fc_seq_els_data rjt_data;
2510 rjt_data.reason = ELS_RJT_UNSUP;
2511 rjt_data.explan = ELS_EXPL_NONE;
2512 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2513 fc_frame_free(fp);
2517 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2518 * @fip: The FCoE controller
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.
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.
2528 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2529 enum fc_disc_event),
2530 struct fc_lport *lport)
2532 struct fc_disc *disc = &lport->disc;
2533 struct fcoe_ctlr *fip = disc->priv;
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);
2544 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2545 * @fip: The FCoE controller
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.
2551 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
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);
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);
2567 mutex_unlock(&disc->disc_mutex);
2568 if (callback)
2569 callback(lport, DISC_EV_SUCCESS);
2573 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
2574 * @fip: The FCoE controller
2576 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
2578 unsigned long next_time;
2579 u8 mac[ETH_ALEN];
2580 u32 new_port_id = 0;
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);
2599 fcoe_ctlr_map_dest(fip);
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:
2606 * This may be invoked either by starting discovery so don't
2607 * go to the next state unless it's been long enough.
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;
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));
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:
2634 WARN(1, "unexpected state %d\n", fip->state);
2635 goto unlock;
2637 mod_timer(&fip->timer, next_time);
2638 unlock:
2639 mutex_unlock(&fip->ctlr_mutex);
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);
2647 * fcoe_libfc_config() - Sets up libfc related properties for local port
2648 * @lp: The local port to configure libfc for
2649 * @fip: The FCoE controller in use by the local port
2650 * @tt: The libfc function template
2651 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
2653 * Returns : 0 for success
2655 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
2656 const struct libfc_function_template *tt, int init_fcp)
2658 /* Set the function pointers set by the LLDD */
2659 memcpy(&lport->tt, tt, sizeof(*tt));
2660 if (init_fcp && fc_fcp_init(lport))
2661 return -ENOMEM;
2662 fc_exch_init(lport);
2663 fc_elsct_init(lport);
2664 fc_lport_init(lport);
2665 if (fip->mode == FIP_MODE_VN2VN)
2666 lport->rport_priv_size = sizeof(struct fcoe_rport);
2667 fc_rport_init(lport);
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);
2680 return 0;
2682 EXPORT_SYMBOL_GPL(fcoe_libfc_config);