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
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>
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];
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)
101 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
102 fcoe_ctlr_state(fip->state), fcoe_ctlr_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);
139 hton24(fip->dest_addr, FIP_DEF_FC_MAP);
140 hton24(fip->dest_addr + 3, 0);
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);
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;
175 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
176 list_del(&fcf->list);
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)
230 spin_unlock_bh(&fip->ctlr_lock);
233 if (sel && !compare_ether_addr(sel->fcf_mac, fip->dest_addr))
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);
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);
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)
280 struct fip_header fip;
282 struct fip_mac_desc mac;
283 struct fip_wwn_desc wwnn;
284 struct fip_size_desc size;
289 skb = dev_alloc_skb(sizeof(*sol));
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);
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);
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);
343 } else if (fip->state == FIP_ST_LINK_WAIT) {
344 fcoe_ctlr_set_state(fip, fip->mode);
347 LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
350 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
352 case FIP_MODE_FABRIC:
353 case FIP_MODE_NON_FIP:
354 mutex_unlock(&fip->ctlr_mutex);
356 fcoe_ctlr_solicit(fip, NULL);
359 fcoe_ctlr_vn_start(fip);
360 mutex_unlock(&fip->ctlr_mutex);
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;
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)
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);
405 fc_linkdown(fip->lp);
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,
431 struct fip_header fip;
432 struct fip_mac_desc mac;
434 struct fip_vn_desc *vn;
437 struct fcoe_fcf *fcf;
441 if (!fcf || (ports && !lp->port_id))
444 len = sizeof(*kal) + ports * sizeof(*vn);
445 skb = dev_alloc_skb(len);
449 kal = (struct fip_kal *)skb->data;
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);
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);
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);
476 skb->protocol = htons(ETH_P_FIP);
477 skb_reset_mac_header(skb);
478 skb_reset_network_header(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 {
502 struct fip_header fip;
503 struct fip_encaps encaps;
505 struct fc_frame_header *fh;
506 struct fip_mac_desc *mac;
507 struct fcoe_fcf *fcf;
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))
526 fip_flags = fcf->flags;
527 fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA :
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;
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);
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);
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,
594 struct fc_frame_header *fh;
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;
610 if (fip->flogi_count < 3)
612 fcoe_ctlr_map_dest(fip);
615 if (fip->state == FIP_ST_NON_FIP)
616 fcoe_ctlr_map_dest(fip);
619 if (fip->state == FIP_ST_NON_FIP)
621 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
626 if (fip->mode == FIP_MODE_VN2VN)
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);
636 if (ntoh24(fh->fh_s_id))
641 if (fip->mode == FIP_MODE_VN2VN) {
642 if (fip->state != FIP_ST_VNMP_UP)
644 if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI)
647 if (fip->state != FIP_ST_ENABLED)
649 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
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
662 if (fip->state == FIP_ST_NON_FIP) {
663 if (fip->flogi_oxid == FC_XID_UNKNOWN)
665 fip->flogi_oxid = FC_XID_UNKNOWN;
666 fc_fcoe_set_mac(mac, fh->fh_d_id);
667 fip->update_mac(lport, mac);
676 if (fip->state != FIP_ST_ENABLED &&
677 fip->state != FIP_ST_VNMP_UP)
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)))
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)
739 list_del(&fcf->list);
740 WARN_ON(!fip->fcf_count);
743 stats->VLinkFailureCount++;
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;
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;
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;
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)
799 desc = (struct fip_desc *)(fiph + 1);
801 dlen = desc->fip_dlen * FIP_BPW;
802 if (dlen < sizeof(*desc) || dlen > rlen)
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");
811 switch (desc->fip_dtype) {
813 if (dlen != sizeof(struct fip_pri_desc))
815 fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
816 desc_mask &= ~BIT(FIP_DT_PRI);
819 if (dlen != sizeof(struct fip_mac_desc))
822 ((struct fip_mac_desc *)desc)->fd_mac,
824 if (!is_valid_ether_addr(fcf->fcf_mac)) {
826 "Invalid MAC addr %pM in FIP adv\n",
830 desc_mask &= ~BIT(FIP_DT_MAC);
833 if (dlen != sizeof(struct fip_wwn_desc))
835 wwn = (struct fip_wwn_desc *)desc;
836 fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
837 desc_mask &= ~BIT(FIP_DT_NAME);
840 if (dlen != sizeof(struct fip_fab_desc))
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);
849 if (dlen != sizeof(struct fip_fka_desc))
851 fka = (struct fip_fka_desc *)desc;
852 if (fka->fd_flags & FIP_FKA_ADV_D)
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);
860 case FIP_DT_FCOE_SIZE:
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)
873 desc = (struct fip_desc *)((char *)desc + dlen);
876 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
878 if (!fcf->switch_name)
881 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
888 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
889 desc->fip_dtype, dlen);
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;
902 struct fcoe_fcf *found;
903 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
907 if (fcoe_ctlr_parse_adv(fip, skb, &new))
910 mutex_lock(&fip->ctlr_mutex);
911 first = list_empty(&fip->fcfs);
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) {
923 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
926 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
931 memcpy(fcf, &new, sizeof(new));
932 list_add(&fcf->list, &fip->fcfs);
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);
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.
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.
982 list_move(&fcf->list, &fip->fcfs);
985 * If this is the first validated FCF, note the time and
986 * set a timer to trigger selection.
988 if (mtu_valid && !fip->sel_fcf && fcoe_ctlr_fcf_usable(fcf)) {
989 fip->sel_time = jiffies +
990 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
991 if (!timer_pending(&fip->timer) ||
992 time_before(fip->sel_time, fip->timer.expires))
993 mod_timer(&fip->timer, fip->sel_time);
996 mutex_unlock(&fip->ctlr_mutex);
1000 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
1001 * @fip: The FCoE controller which received the packet
1002 * @skb: The received FIP packet
1004 static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1006 struct fc_lport *lport = fip->lp;
1007 struct fip_header *fiph;
1008 struct fc_frame *fp = (struct fc_frame *)skb;
1009 struct fc_frame_header *fh = NULL;
1010 struct fip_desc *desc;
1011 struct fip_encaps *els;
1012 struct fcoe_dev_stats *stats;
1013 enum fip_desc_type els_dtype = 0;
1016 u8 granted_mac[ETH_ALEN] = { 0 };
1023 fiph = (struct fip_header *)skb->data;
1024 sub = fiph->fip_subcode;
1025 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1028 rlen = ntohs(fiph->fip_dl_len) * 4;
1029 if (rlen + sizeof(*fiph) > skb->len)
1032 desc = (struct fip_desc *)(fiph + 1);
1035 dlen = desc->fip_dlen * FIP_BPW;
1036 if (dlen < sizeof(*desc) || dlen > rlen)
1038 /* Drop ELS if there are duplicate critical descriptors */
1039 if (desc->fip_dtype < 32) {
1040 if (desc_mask & 1U << desc->fip_dtype) {
1041 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1042 "Descriptors in FIP ELS\n");
1045 desc_mask |= (1 << desc->fip_dtype);
1047 switch (desc->fip_dtype) {
1049 if (desc_cnt == 1) {
1050 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1051 "received out of order\n");
1055 if (dlen != sizeof(struct fip_mac_desc))
1058 ((struct fip_mac_desc *)desc)->fd_mac,
1065 if (desc_cnt != 1) {
1066 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1067 "received out of order\n");
1072 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1074 els_len = dlen - sizeof(*els);
1075 els = (struct fip_encaps *)desc;
1076 fh = (struct fc_frame_header *)(els + 1);
1077 els_dtype = desc->fip_dtype;
1080 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1081 "in FIP adv\n", desc->fip_dtype);
1082 /* standard says ignore unknown descriptors >= 128 */
1083 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1085 if (desc_cnt <= 2) {
1086 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1087 "received out of order\n");
1092 desc = (struct fip_desc *)((char *)desc + dlen);
1098 els_op = *(u8 *)(fh + 1);
1100 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
1101 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
1102 if (els_op == ELS_LS_ACC) {
1103 if (!is_valid_ether_addr(granted_mac)) {
1104 LIBFCOE_FIP_DBG(fip,
1105 "Invalid MAC address %pM in FIP ELS\n",
1109 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1111 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1112 fip->flogi_oxid = FC_XID_UNKNOWN;
1113 if (els_dtype == FIP_DT_FLOGI)
1114 fcoe_ctlr_announce(fip);
1116 } else if (els_dtype == FIP_DT_FLOGI &&
1117 !fcoe_ctlr_flogi_retry(fip))
1118 goto drop; /* retrying FLOGI so drop reject */
1121 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
1122 (!(1U << FIP_DT_MAC & desc_mask)))) {
1123 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
1129 * Convert skb into an fc_frame containing only the ELS.
1131 skb_pull(skb, (u8 *)fh - skb->data);
1132 skb_trim(skb, els_len);
1133 fp = (struct fc_frame *)skb;
1135 fr_sof(fp) = FC_SOF_I3;
1136 fr_eof(fp) = FC_EOF_T;
1138 fr_encaps(fp) = els_dtype;
1140 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1142 stats->RxWords += skb->len / FIP_BPW;
1145 fc_exch_recv(lport, fp);
1149 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1150 desc->fip_dtype, dlen);
1156 * fcoe_ctlr_recv_els() - Handle an incoming link reset frame
1157 * @fip: The FCoE controller that received the frame
1158 * @fh: The received FIP header
1160 * There may be multiple VN_Port descriptors.
1161 * The overall length has already been checked.
1163 static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1164 struct fip_header *fh)
1166 struct fip_desc *desc;
1167 struct fip_mac_desc *mp;
1168 struct fip_wwn_desc *wp;
1169 struct fip_vn_desc *vp;
1172 struct fcoe_fcf *fcf = fip->sel_fcf;
1173 struct fc_lport *lport = fip->lp;
1174 struct fc_lport *vn_port = NULL;
1178 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1180 if (!fcf || !lport->port_id)
1184 * mask of required descriptors. Validating each one clears its bit.
1186 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) | BIT(FIP_DT_VN_ID);
1188 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1189 desc = (struct fip_desc *)(fh + 1);
1190 while (rlen >= sizeof(*desc)) {
1191 dlen = desc->fip_dlen * FIP_BPW;
1194 /* Drop CVL if there are duplicate critical descriptors */
1195 if ((desc->fip_dtype < 32) &&
1196 !(desc_mask & 1U << desc->fip_dtype)) {
1197 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1198 "Descriptors in FIP CVL\n");
1201 switch (desc->fip_dtype) {
1203 mp = (struct fip_mac_desc *)desc;
1204 if (dlen < sizeof(*mp))
1206 if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
1208 desc_mask &= ~BIT(FIP_DT_MAC);
1211 wp = (struct fip_wwn_desc *)desc;
1212 if (dlen < sizeof(*wp))
1214 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1216 desc_mask &= ~BIT(FIP_DT_NAME);
1219 vp = (struct fip_vn_desc *)desc;
1220 if (dlen < sizeof(*vp))
1222 if (compare_ether_addr(vp->fd_mac,
1223 fip->get_src_addr(lport)) == 0 &&
1224 get_unaligned_be64(&vp->fd_wwpn) == lport->wwpn &&
1225 ntoh24(vp->fd_fc_id) == lport->port_id) {
1226 desc_mask &= ~BIT(FIP_DT_VN_ID);
1229 /* check if clr_vlink is for NPIV port */
1230 mutex_lock(&lport->lp_mutex);
1231 list_for_each_entry(vn_port, &lport->vports, list) {
1232 if (compare_ether_addr(vp->fd_mac,
1233 fip->get_src_addr(vn_port)) == 0 &&
1234 (get_unaligned_be64(&vp->fd_wwpn)
1235 == vn_port->wwpn) &&
1236 (ntoh24(vp->fd_fc_id) ==
1237 fc_host_port_id(vn_port->host))) {
1238 desc_mask &= ~BIT(FIP_DT_VN_ID);
1243 mutex_unlock(&lport->lp_mutex);
1247 /* standard says ignore unknown descriptors >= 128 */
1248 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1252 desc = (struct fip_desc *)((char *)desc + dlen);
1257 * reset only if all required descriptors were present and valid.
1260 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1263 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1266 fc_lport_reset(vn_port);
1268 mutex_lock(&fip->ctlr_mutex);
1269 per_cpu_ptr(lport->dev_stats,
1270 get_cpu())->VLinkFailureCount++;
1272 fcoe_ctlr_reset(fip);
1273 mutex_unlock(&fip->ctlr_mutex);
1275 fc_lport_reset(fip->lp);
1276 fcoe_ctlr_solicit(fip, NULL);
1282 * fcoe_ctlr_recv() - Receive a FIP packet
1283 * @fip: The FCoE controller that received the packet
1284 * @skb: The received FIP packet
1286 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1288 void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1290 skb_queue_tail(&fip->fip_recv_list, skb);
1291 schedule_work(&fip->recv_work);
1293 EXPORT_SYMBOL(fcoe_ctlr_recv);
1296 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1297 * @fip: The FCoE controller that received the frame
1298 * @skb: The received FIP frame
1300 * Returns non-zero if the frame is dropped.
1302 static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1304 struct fip_header *fiph;
1306 enum fip_state state;
1310 if (skb_linearize(skb))
1312 if (skb->len < sizeof(*fiph))
1315 if (fip->mode == FIP_MODE_VN2VN) {
1316 if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
1317 compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) &&
1318 compare_ether_addr(eh->h_dest, fcoe_all_p2p))
1320 } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
1321 compare_ether_addr(eh->h_dest, fcoe_all_enode))
1323 fiph = (struct fip_header *)skb->data;
1324 op = ntohs(fiph->fip_op);
1325 sub = fiph->fip_subcode;
1327 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1329 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1332 mutex_lock(&fip->ctlr_mutex);
1334 if (state == FIP_ST_AUTO) {
1336 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1337 state = FIP_ST_ENABLED;
1338 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1340 mutex_unlock(&fip->ctlr_mutex);
1342 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1343 return fcoe_ctlr_vn_recv(fip, skb);
1345 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1346 state != FIP_ST_VNMP_CLAIM)
1349 if (op == FIP_OP_LS) {
1350 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1354 if (state != FIP_ST_ENABLED)
1357 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1358 fcoe_ctlr_recv_adv(fip, skb);
1359 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1360 fcoe_ctlr_recv_clr_vlink(fip, fiph);
1369 * fcoe_ctlr_select() - Select the best FCF (if possible)
1370 * @fip: The FCoE controller
1372 * Returns the selected FCF, or NULL if none are usable.
1374 * If there are conflicting advertisements, no FCF can be chosen.
1376 * If there is already a selected FCF, this will choose a better one or
1377 * an equivalent one that hasn't already been sent a FLOGI.
1379 * Called with lock held.
1381 static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1383 struct fcoe_fcf *fcf;
1384 struct fcoe_fcf *best = fip->sel_fcf;
1385 struct fcoe_fcf *first;
1387 first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list);
1389 list_for_each_entry(fcf, &fip->fcfs, list) {
1390 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1391 "VFID %d mac %pM map %x val %d "
1393 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1394 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1395 fcf->flogi_sent, fcf->pri);
1396 if (fcf->fabric_name != first->fabric_name ||
1397 fcf->vfid != first->vfid ||
1398 fcf->fc_map != first->fc_map) {
1399 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1403 if (fcf->flogi_sent)
1405 if (!fcoe_ctlr_fcf_usable(fcf)) {
1406 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1407 "map %x %svalid %savailable\n",
1408 fcf->fabric_name, fcf->fc_map,
1409 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1410 (fcf->flags & FIP_FL_AVAIL) ?
1414 if (!best || fcf->pri < best->pri || best->flogi_sent)
1417 fip->sel_fcf = best;
1419 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1420 fip->port_ka_time = jiffies +
1421 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1422 fip->ctlr_ka_time = jiffies + best->fka_period;
1423 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1424 mod_timer(&fip->timer, fip->ctlr_ka_time);
1430 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1431 * @fip: The FCoE controller
1433 * Returns non-zero error if it could not be sent.
1435 * Called with ctlr_mutex and ctlr_lock held.
1436 * Caller must verify that fip->sel_fcf is not NULL.
1438 static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1440 struct sk_buff *skb;
1441 struct sk_buff *skb_orig;
1442 struct fc_frame_header *fh;
1445 skb_orig = fip->flogi_req;
1450 * Clone and send the FLOGI request. If clone fails, use original.
1452 skb = skb_clone(skb_orig, GFP_ATOMIC);
1455 fip->flogi_req = NULL;
1457 fh = (struct fc_frame_header *)skb->data;
1458 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1459 ntoh24(fh->fh_d_id));
1464 fip->send(fip, skb);
1465 fip->sel_fcf->flogi_sent = 1;
1470 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1471 * @fip: The FCoE controller
1473 * Returns non-zero error code if there's no FLOGI request to retry or
1474 * no alternate FCF available.
1476 static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1478 struct fcoe_fcf *fcf;
1481 mutex_lock(&fip->ctlr_mutex);
1482 spin_lock_bh(&fip->ctlr_lock);
1483 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1484 fcf = fcoe_ctlr_select(fip);
1485 if (!fcf || fcf->flogi_sent) {
1486 kfree_skb(fip->flogi_req);
1487 fip->flogi_req = NULL;
1490 fcoe_ctlr_solicit(fip, NULL);
1491 error = fcoe_ctlr_flogi_send_locked(fip);
1493 spin_unlock_bh(&fip->ctlr_lock);
1494 mutex_unlock(&fip->ctlr_mutex);
1500 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1501 * @fip: The FCoE controller that timed out
1503 * Done here because fcoe_ctlr_els_send() can't get mutex.
1505 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1507 static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1509 struct fcoe_fcf *fcf;
1511 spin_lock_bh(&fip->ctlr_lock);
1513 if (!fcf || !fip->flogi_req_send)
1516 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1519 * If this FLOGI is being sent due to a timeout retry
1520 * to the same FCF as before, select a different FCF if possible.
1522 if (fcf->flogi_sent) {
1523 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1524 fcf = fcoe_ctlr_select(fip);
1525 if (!fcf || fcf->flogi_sent) {
1526 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1527 list_for_each_entry(fcf, &fip->fcfs, list)
1528 fcf->flogi_sent = 0;
1529 fcf = fcoe_ctlr_select(fip);
1533 fcoe_ctlr_flogi_send_locked(fip);
1534 fip->flogi_req_send = 0;
1536 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1538 spin_unlock_bh(&fip->ctlr_lock);
1542 * fcoe_ctlr_timeout() - FIP timeout handler
1543 * @arg: The FCoE controller that timed out
1545 static void fcoe_ctlr_timeout(unsigned long arg)
1547 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1549 schedule_work(&fip->timer_work);
1553 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1554 * @work: Handle to a FCoE controller
1556 * Ages FCFs. Triggers FCF selection if possible.
1557 * Sends keep-alives and resets.
1559 static void fcoe_ctlr_timer_work(struct work_struct *work)
1561 struct fcoe_ctlr *fip;
1562 struct fc_lport *vport;
1565 u8 send_ctlr_ka = 0;
1566 u8 send_port_ka = 0;
1567 struct fcoe_fcf *sel;
1568 struct fcoe_fcf *fcf;
1569 unsigned long next_timer;
1571 fip = container_of(work, struct fcoe_ctlr, timer_work);
1572 if (fip->mode == FIP_MODE_VN2VN)
1573 return fcoe_ctlr_vn_timeout(fip);
1574 mutex_lock(&fip->ctlr_mutex);
1575 if (fip->state == FIP_ST_DISABLED) {
1576 mutex_unlock(&fip->ctlr_mutex);
1581 next_timer = fcoe_ctlr_age_fcfs(fip);
1584 if (!sel && fip->sel_time) {
1585 if (time_after_eq(jiffies, fip->sel_time)) {
1586 sel = fcoe_ctlr_select(fip);
1588 } else if (time_after(next_timer, fip->sel_time))
1589 next_timer = fip->sel_time;
1592 if (sel && fip->flogi_req_send)
1593 fcoe_ctlr_flogi_send(fip);
1594 else if (!sel && fcf)
1597 if (sel && !sel->fd_flags) {
1598 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1599 fip->ctlr_ka_time = jiffies + sel->fka_period;
1602 if (time_after(next_timer, fip->ctlr_ka_time))
1603 next_timer = fip->ctlr_ka_time;
1605 if (time_after_eq(jiffies, fip->port_ka_time)) {
1606 fip->port_ka_time = jiffies +
1607 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1610 if (time_after(next_timer, fip->port_ka_time))
1611 next_timer = fip->port_ka_time;
1613 if (!list_empty(&fip->fcfs))
1614 mod_timer(&fip->timer, next_timer);
1615 mutex_unlock(&fip->ctlr_mutex);
1618 fc_lport_reset(fip->lp);
1619 /* restart things with a solicitation */
1620 fcoe_ctlr_solicit(fip, NULL);
1624 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1627 mutex_lock(&fip->lp->lp_mutex);
1628 mac = fip->get_src_addr(fip->lp);
1629 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1630 list_for_each_entry(vport, &fip->lp->vports, list) {
1631 mac = fip->get_src_addr(vport);
1632 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1634 mutex_unlock(&fip->lp->lp_mutex);
1639 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1640 * @recv_work: Handle to a FCoE controller
1642 static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1644 struct fcoe_ctlr *fip;
1645 struct sk_buff *skb;
1647 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1648 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1649 fcoe_ctlr_recv_handler(fip, skb);
1653 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1654 * @fip: The FCoE controller
1655 * @fp: The FC frame to snoop
1657 * Snoop potential response to FLOGI or even incoming FLOGI.
1659 * The caller has checked that we are waiting for login as indicated
1660 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1662 * The caller is responsible for freeing the frame.
1663 * Fill in the granted_mac address.
1665 * Return non-zero if the frame should not be delivered to libfc.
1667 int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1668 struct fc_frame *fp)
1670 struct fc_frame_header *fh;
1674 sa = eth_hdr(&fp->skb)->h_source;
1675 fh = fc_frame_header_get(fp);
1676 if (fh->fh_type != FC_TYPE_ELS)
1679 op = fc_frame_payload_op(fp);
1680 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1681 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1683 mutex_lock(&fip->ctlr_mutex);
1684 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1685 mutex_unlock(&fip->ctlr_mutex);
1688 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1689 LIBFCOE_FIP_DBG(fip,
1690 "received FLOGI LS_ACC using non-FIP mode\n");
1694 * If the src mac addr is FC_OUI-based, then we mark the
1695 * address_mode flag to use FC_OUI-based Ethernet DA.
1696 * Otherwise we use the FCoE gateway addr
1698 if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1699 fcoe_ctlr_map_dest(fip);
1701 memcpy(fip->dest_addr, sa, ETH_ALEN);
1704 fip->flogi_oxid = FC_XID_UNKNOWN;
1705 mutex_unlock(&fip->ctlr_mutex);
1706 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1707 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1709 * Save source MAC for point-to-point responses.
1711 mutex_lock(&fip->ctlr_mutex);
1712 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1713 memcpy(fip->dest_addr, sa, ETH_ALEN);
1715 if (fip->state == FIP_ST_AUTO)
1716 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1717 "Setting non-FIP mode\n");
1718 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1720 mutex_unlock(&fip->ctlr_mutex);
1724 EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1727 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1728 * @mac: The MAC address to convert
1729 * @scheme: The scheme to use when converting
1730 * @port: The port indicator for converting
1732 * Returns: u64 fc world wide name
1734 u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1735 unsigned int scheme, unsigned int port)
1740 /* The MAC is in NO, so flip only the low 48 bits */
1741 host_mac = ((u64) mac[0] << 40) |
1742 ((u64) mac[1] << 32) |
1743 ((u64) mac[2] << 24) |
1744 ((u64) mac[3] << 16) |
1745 ((u64) mac[4] << 8) |
1748 WARN_ON(host_mac >= (1ULL << 48));
1749 wwn = host_mac | ((u64) scheme << 60);
1755 WARN_ON(port >= 0xfff);
1756 wwn |= (u64) port << 48;
1765 EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1768 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1769 * @rdata: libfc remote port
1771 static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1773 return (struct fcoe_rport *)(rdata + 1);
1777 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
1778 * @fip: The FCoE controller
1779 * @sub: sub-opcode for probe request, reply, or advertisement.
1780 * @dest: The destination Ethernet MAC address
1781 * @min_len: minimum size of the Ethernet payload to be sent
1783 static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
1784 enum fip_vn2vn_subcode sub,
1785 const u8 *dest, size_t min_len)
1787 struct sk_buff *skb;
1790 struct fip_header fip;
1791 struct fip_mac_desc mac;
1792 struct fip_wwn_desc wwnn;
1793 struct fip_vn_desc vn;
1795 struct fip_fc4_feat *ff;
1796 struct fip_size_desc *size;
1801 len = sizeof(*frame);
1803 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
1804 dlen = sizeof(struct fip_fc4_feat) +
1805 sizeof(struct fip_size_desc);
1808 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
1809 len = max(len, min_len + sizeof(struct ethhdr));
1811 skb = dev_alloc_skb(len);
1815 frame = (struct fip_frame *)skb->data;
1816 memset(frame, 0, len);
1817 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
1818 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
1819 frame->eth.h_proto = htons(ETH_P_FIP);
1821 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
1822 frame->fip.fip_op = htons(FIP_OP_VN2VN);
1823 frame->fip.fip_subcode = sub;
1824 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
1826 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
1827 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
1828 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
1830 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
1831 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
1832 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
1834 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
1835 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
1836 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
1837 hton24(frame->vn.fd_mac + 3, fip->port_id);
1838 hton24(frame->vn.fd_fc_id, fip->port_id);
1839 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
1842 * For claims, add FC-4 features.
1843 * TBD: Add interface to get fc-4 types and features from libfc.
1845 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
1846 ff = (struct fip_fc4_feat *)(frame + 1);
1847 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
1848 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
1849 ff->fd_fts = fip->lp->fcts;
1852 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
1853 fcp_feat |= FCP_FEAT_INIT;
1854 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
1855 fcp_feat |= FCP_FEAT_TARG;
1856 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
1857 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
1859 size = (struct fip_size_desc *)(ff + 1);
1860 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
1861 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
1862 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
1866 skb->protocol = htons(ETH_P_FIP);
1867 skb_reset_mac_header(skb);
1868 skb_reset_network_header(skb);
1870 fip->send(fip, skb);
1874 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
1875 * @lport: The lport which is receiving the event
1876 * @rdata: remote port private data
1877 * @event: The event that occurred
1879 * Locking Note: The rport lock must not be held when calling this function.
1881 static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
1882 struct fc_rport_priv *rdata,
1883 enum fc_rport_event event)
1885 struct fcoe_ctlr *fip = lport->disc.priv;
1886 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
1888 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
1889 rdata->ids.port_id, event);
1891 mutex_lock(&fip->ctlr_mutex);
1893 case RPORT_EV_READY:
1894 frport->login_count = 0;
1897 case RPORT_EV_FAILED:
1899 frport->login_count++;
1900 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
1901 LIBFCOE_FIP_DBG(fip,
1902 "rport FLOGI limited port_id %6.6x\n",
1903 rdata->ids.port_id);
1904 lport->tt.rport_logoff(rdata);
1910 mutex_unlock(&fip->ctlr_mutex);
1913 static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
1914 .event_callback = fcoe_ctlr_vn_rport_callback,
1918 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
1919 * @fip: The FCoE controller
1921 * Called with ctlr_mutex held.
1923 static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
1925 mutex_lock(&lport->disc.disc_mutex);
1926 lport->disc.disc_callback = NULL;
1927 mutex_unlock(&lport->disc.disc_mutex);
1931 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
1932 * @fip: The FCoE controller
1934 * Called through the local port template for discovery.
1935 * Called without the ctlr_mutex held.
1937 static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
1939 struct fcoe_ctlr *fip = lport->disc.priv;
1941 mutex_lock(&fip->ctlr_mutex);
1942 fcoe_ctlr_disc_stop_locked(lport);
1943 mutex_unlock(&fip->ctlr_mutex);
1947 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
1948 * @fip: The FCoE controller
1950 * Called through the local port template for discovery.
1951 * Called without the ctlr_mutex held.
1953 static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
1955 fcoe_ctlr_disc_stop(lport);
1956 lport->tt.rport_flush_queue();
1961 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
1962 * @fip: The FCoE controller
1964 * Called with fcoe_ctlr lock held.
1966 static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
1971 fcoe_ctlr_disc_stop_locked(fip->lp);
1974 * Get proposed port ID.
1975 * If this is the first try after link up, use any previous port_id.
1976 * If there was none, use the low bits of the port_name.
1977 * On subsequent tries, get the next random one.
1978 * Don't use reserved IDs, use another non-zero value, just as random.
1980 port_id = fip->port_id;
1981 if (fip->probe_tries)
1982 port_id = prandom32(&fip->rnd_state) & 0xffff;
1984 port_id = fip->lp->wwpn & 0xffff;
1985 if (!port_id || port_id == 0xffff)
1987 fip->port_id = port_id;
1989 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
1991 wait = random32() % FIP_VN_PROBE_WAIT;
1993 wait = FIP_VN_RLIM_INT;
1994 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
1995 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
1999 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2000 * @fip: The FCoE controller
2002 * Called with fcoe_ctlr lock held.
2004 static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2006 fip->probe_tries = 0;
2007 prandom32_seed(&fip->rnd_state, fip->lp->wwpn);
2008 fcoe_ctlr_vn_restart(fip);
2012 * fcoe_ctlr_vn_parse - parse probe request or response
2013 * @fip: The FCoE controller
2014 * @skb: incoming packet
2015 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
2017 * Returns non-zero error number on error.
2018 * Does not consume the packet.
2020 static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2021 struct sk_buff *skb,
2022 struct fc_rport_priv *rdata)
2024 struct fip_header *fiph;
2025 struct fip_desc *desc = NULL;
2026 struct fip_mac_desc *macd = NULL;
2027 struct fip_wwn_desc *wwn = NULL;
2028 struct fip_vn_desc *vn = NULL;
2029 struct fip_size_desc *size = NULL;
2030 struct fcoe_rport *frport;
2037 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2038 frport = fcoe_ctlr_rport(rdata);
2040 fiph = (struct fip_header *)skb->data;
2041 frport->flags = ntohs(fiph->fip_flags);
2043 sub = fiph->fip_subcode;
2045 case FIP_SC_VN_PROBE_REQ:
2046 case FIP_SC_VN_PROBE_REP:
2047 case FIP_SC_VN_BEACON:
2048 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2051 case FIP_SC_VN_CLAIM_NOTIFY:
2052 case FIP_SC_VN_CLAIM_REP:
2053 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2054 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2055 BIT(FIP_DT_FCOE_SIZE);
2058 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2062 rlen = ntohs(fiph->fip_dl_len) * 4;
2063 if (rlen + sizeof(*fiph) > skb->len)
2066 desc = (struct fip_desc *)(fiph + 1);
2068 dlen = desc->fip_dlen * FIP_BPW;
2069 if (dlen < sizeof(*desc) || dlen > rlen)
2072 dtype = desc->fip_dtype;
2074 if (!(desc_mask & BIT(dtype))) {
2075 LIBFCOE_FIP_DBG(fip,
2076 "unexpected or duplicated desc "
2078 "FIP VN2VN subtype %u\n",
2082 desc_mask &= ~BIT(dtype);
2087 if (dlen != sizeof(struct fip_mac_desc))
2089 macd = (struct fip_mac_desc *)desc;
2090 if (!is_valid_ether_addr(macd->fd_mac)) {
2091 LIBFCOE_FIP_DBG(fip,
2092 "Invalid MAC addr %pM in FIP VN2VN\n",
2096 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2099 if (dlen != sizeof(struct fip_wwn_desc))
2101 wwn = (struct fip_wwn_desc *)desc;
2102 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2105 if (dlen != sizeof(struct fip_vn_desc))
2107 vn = (struct fip_vn_desc *)desc;
2108 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2109 rdata->ids.port_id = ntoh24(vn->fd_fc_id);
2110 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
2113 if (dlen != sizeof(struct fip_fc4_feat))
2116 case FIP_DT_FCOE_SIZE:
2117 if (dlen != sizeof(struct fip_size_desc))
2119 size = (struct fip_size_desc *)desc;
2120 frport->fcoe_len = ntohs(size->fd_size);
2123 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2124 "in FIP probe\n", dtype);
2125 /* standard says ignore unknown descriptors >= 128 */
2126 if (dtype < FIP_DT_VENDOR_BASE)
2130 desc = (struct fip_desc *)((char *)desc + dlen);
2136 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2142 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2143 * @fip: The FCoE controller
2145 * Called with ctlr_mutex held.
2147 static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2149 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2150 fip->sol_time = jiffies;
2154 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2155 * @fip: The FCoE controller
2156 * @rdata: parsed remote port with frport from the probe request
2158 * Called with ctlr_mutex held.
2160 static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2161 struct fc_rport_priv *rdata)
2163 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2165 if (rdata->ids.port_id != fip->port_id)
2168 switch (fip->state) {
2169 case FIP_ST_VNMP_CLAIM:
2170 case FIP_ST_VNMP_UP:
2171 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2172 frport->enode_mac, 0);
2174 case FIP_ST_VNMP_PROBE1:
2175 case FIP_ST_VNMP_PROBE2:
2177 * Decide whether to reply to the Probe.
2178 * Our selected address is never a "recorded" one, so
2179 * only reply if our WWPN is greater and the
2180 * Probe's REC bit is not set.
2181 * If we don't reply, we will change our address.
2183 if (fip->lp->wwpn > rdata->ids.port_name &&
2184 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2185 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2186 frport->enode_mac, 0);
2190 case FIP_ST_VNMP_START:
2191 fcoe_ctlr_vn_restart(fip);
2199 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2200 * @fip: The FCoE controller
2201 * @rdata: parsed remote port with frport from the probe request
2203 * Called with ctlr_mutex held.
2205 static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2206 struct fc_rport_priv *rdata)
2208 if (rdata->ids.port_id != fip->port_id)
2210 switch (fip->state) {
2211 case FIP_ST_VNMP_START:
2212 case FIP_ST_VNMP_PROBE1:
2213 case FIP_ST_VNMP_PROBE2:
2214 case FIP_ST_VNMP_CLAIM:
2215 fcoe_ctlr_vn_restart(fip);
2217 case FIP_ST_VNMP_UP:
2218 fcoe_ctlr_vn_send_claim(fip);
2226 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2227 * @fip: The FCoE controller
2228 * @new: newly-parsed remote port with frport as a template for new rdata
2230 * Called with ctlr_mutex held.
2232 static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
2234 struct fc_lport *lport = fip->lp;
2235 struct fc_rport_priv *rdata;
2236 struct fc_rport_identifiers *ids;
2237 struct fcoe_rport *frport;
2240 port_id = new->ids.port_id;
2241 if (port_id == fip->port_id)
2244 mutex_lock(&lport->disc.disc_mutex);
2245 rdata = lport->tt.rport_create(lport, port_id);
2247 mutex_unlock(&lport->disc.disc_mutex);
2251 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2252 rdata->disc_id = lport->disc.disc_id;
2255 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
2256 (ids->node_name != -1 && ids->node_name != new->ids.node_name))
2257 lport->tt.rport_logoff(rdata);
2258 ids->port_name = new->ids.port_name;
2259 ids->node_name = new->ids.node_name;
2260 mutex_unlock(&lport->disc.disc_mutex);
2262 frport = fcoe_ctlr_rport(rdata);
2263 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
2264 port_id, frport->fcoe_len ? "old" : "new");
2265 *frport = *fcoe_ctlr_rport(new);
2270 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2271 * @fip: The FCoE controller
2272 * @port_id: The port_id of the remote VN_node
2273 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2275 * Returns non-zero error if no remote port found.
2277 static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2279 struct fc_lport *lport = fip->lp;
2280 struct fc_rport_priv *rdata;
2281 struct fcoe_rport *frport;
2285 rdata = lport->tt.rport_lookup(lport, port_id);
2287 frport = fcoe_ctlr_rport(rdata);
2288 memcpy(mac, frport->enode_mac, ETH_ALEN);
2296 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2297 * @fip: The FCoE controller
2298 * @new: newly-parsed remote port with frport as a template for new rdata
2300 * Called with ctlr_mutex held.
2302 static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2303 struct fc_rport_priv *new)
2305 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
2307 if (frport->flags & FIP_FL_REC_OR_P2P) {
2308 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2311 switch (fip->state) {
2312 case FIP_ST_VNMP_START:
2313 case FIP_ST_VNMP_PROBE1:
2314 case FIP_ST_VNMP_PROBE2:
2315 if (new->ids.port_id == fip->port_id)
2316 fcoe_ctlr_vn_restart(fip);
2318 case FIP_ST_VNMP_CLAIM:
2319 case FIP_ST_VNMP_UP:
2320 if (new->ids.port_id == fip->port_id) {
2321 if (new->ids.port_name > fip->lp->wwpn) {
2322 fcoe_ctlr_vn_restart(fip);
2325 fcoe_ctlr_vn_send_claim(fip);
2328 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
2329 min((u32)frport->fcoe_len,
2330 fcoe_ctlr_fcoe_size(fip)));
2331 fcoe_ctlr_vn_add(fip, new);
2339 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2340 * @fip: The FCoE controller that received the frame
2341 * @new: newly-parsed remote port with frport from the Claim Response
2343 * Called with ctlr_mutex held.
2345 static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2346 struct fc_rport_priv *new)
2348 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2349 new->ids.port_id, fcoe_ctlr_state(fip->state));
2350 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2351 fcoe_ctlr_vn_add(fip, new);
2355 * fcoe_ctlr_vn_beacon() - handle received beacon.
2356 * @fip: The FCoE controller that received the frame
2357 * @new: newly-parsed remote port with frport from the Beacon
2359 * Called with ctlr_mutex held.
2361 static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2362 struct fc_rport_priv *new)
2364 struct fc_lport *lport = fip->lp;
2365 struct fc_rport_priv *rdata;
2366 struct fcoe_rport *frport;
2368 frport = fcoe_ctlr_rport(new);
2369 if (frport->flags & FIP_FL_REC_OR_P2P) {
2370 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2373 mutex_lock(&lport->disc.disc_mutex);
2374 rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
2376 kref_get(&rdata->kref);
2377 mutex_unlock(&lport->disc.disc_mutex);
2379 if (rdata->ids.node_name == new->ids.node_name &&
2380 rdata->ids.port_name == new->ids.port_name) {
2381 frport = fcoe_ctlr_rport(rdata);
2382 if (!frport->time && fip->state == FIP_ST_VNMP_UP)
2383 lport->tt.rport_login(rdata);
2384 frport->time = jiffies;
2386 kref_put(&rdata->kref, lport->tt.rport_destroy);
2389 if (fip->state != FIP_ST_VNMP_UP)
2393 * Beacon from a new neighbor.
2394 * Send a claim notify if one hasn't been sent recently.
2395 * Don't add the neighbor yet.
2397 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2399 if (time_after(jiffies,
2400 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2401 fcoe_ctlr_vn_send_claim(fip);
2405 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2406 * @fip: The FCoE controller
2408 * Called with ctlr_mutex held.
2409 * Called only in state FIP_ST_VNMP_UP.
2410 * Returns the soonest time for next age-out or a time far in the future.
2412 static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2414 struct fc_lport *lport = fip->lp;
2415 struct fc_rport_priv *rdata;
2416 struct fcoe_rport *frport;
2417 unsigned long next_time;
2418 unsigned long deadline;
2420 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2421 mutex_lock(&lport->disc.disc_mutex);
2422 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2423 frport = fcoe_ctlr_rport(rdata);
2426 deadline = frport->time +
2427 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2428 if (time_after_eq(jiffies, deadline)) {
2430 LIBFCOE_FIP_DBG(fip,
2431 "port %16.16llx fc_id %6.6x beacon expired\n",
2432 rdata->ids.port_name, rdata->ids.port_id);
2433 lport->tt.rport_logoff(rdata);
2434 } else if (time_before(deadline, next_time))
2435 next_time = deadline;
2437 mutex_unlock(&lport->disc.disc_mutex);
2442 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2443 * @fip: The FCoE controller that received the frame
2444 * @skb: The received FIP frame
2446 * Returns non-zero if the frame is dropped.
2447 * Always consumes the frame.
2449 static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2451 struct fip_header *fiph;
2452 enum fip_vn2vn_subcode sub;
2454 struct fc_rport_priv rdata;
2455 struct fcoe_rport frport;
2459 fiph = (struct fip_header *)skb->data;
2460 sub = fiph->fip_subcode;
2462 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
2464 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2468 mutex_lock(&fip->ctlr_mutex);
2470 case FIP_SC_VN_PROBE_REQ:
2471 fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
2473 case FIP_SC_VN_PROBE_REP:
2474 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
2476 case FIP_SC_VN_CLAIM_NOTIFY:
2477 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
2479 case FIP_SC_VN_CLAIM_REP:
2480 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
2482 case FIP_SC_VN_BEACON:
2483 fcoe_ctlr_vn_beacon(fip, &buf.rdata);
2486 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2490 mutex_unlock(&fip->ctlr_mutex);
2497 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2498 * @lport: The local port
2499 * @fp: The received frame
2501 * This should never be called since we don't see RSCNs or other
2502 * fabric-generated ELSes.
2504 static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2506 struct fc_seq_els_data rjt_data;
2508 rjt_data.reason = ELS_RJT_UNSUP;
2509 rjt_data.explan = ELS_EXPL_NONE;
2510 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2515 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2516 * @fip: The FCoE controller
2518 * This sets a flag indicating that remote ports should be created
2519 * and started for the peers we discover. We use the disc_callback
2520 * pointer as that flag. Peers already discovered are created here.
2522 * The lport lock is held during this call. The callback must be done
2523 * later, without holding either the lport or discovery locks.
2524 * The fcoe_ctlr lock may also be held during this call.
2526 static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2527 enum fc_disc_event),
2528 struct fc_lport *lport)
2530 struct fc_disc *disc = &lport->disc;
2531 struct fcoe_ctlr *fip = disc->priv;
2533 mutex_lock(&disc->disc_mutex);
2534 disc->disc_callback = callback;
2535 disc->disc_id = (disc->disc_id + 2) | 1;
2537 schedule_work(&fip->timer_work);
2538 mutex_unlock(&disc->disc_mutex);
2542 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2543 * @fip: The FCoE controller
2545 * Starts the FLOGI and PLOGI login process to each discovered rport for which
2546 * we've received at least one beacon.
2547 * Performs the discovery complete callback.
2549 static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
2551 struct fc_lport *lport = fip->lp;
2552 struct fc_disc *disc = &lport->disc;
2553 struct fc_rport_priv *rdata;
2554 struct fcoe_rport *frport;
2555 void (*callback)(struct fc_lport *, enum fc_disc_event);
2557 mutex_lock(&disc->disc_mutex);
2558 callback = disc->pending ? disc->disc_callback : NULL;
2560 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
2561 frport = fcoe_ctlr_rport(rdata);
2563 lport->tt.rport_login(rdata);
2565 mutex_unlock(&disc->disc_mutex);
2567 callback(lport, DISC_EV_SUCCESS);
2571 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
2572 * @fip: The FCoE controller
2574 static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
2576 unsigned long next_time;
2578 u32 new_port_id = 0;
2580 mutex_lock(&fip->ctlr_mutex);
2581 switch (fip->state) {
2582 case FIP_ST_VNMP_START:
2583 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
2584 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2585 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
2587 case FIP_ST_VNMP_PROBE1:
2588 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
2589 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2590 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2592 case FIP_ST_VNMP_PROBE2:
2593 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
2594 new_port_id = fip->port_id;
2595 hton24(mac, FIP_VN_FC_MAP);
2596 hton24(mac + 3, new_port_id);
2597 fcoe_ctlr_map_dest(fip);
2598 fip->update_mac(fip->lp, mac);
2599 fcoe_ctlr_vn_send_claim(fip);
2600 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2602 case FIP_ST_VNMP_CLAIM:
2604 * This may be invoked either by starting discovery so don't
2605 * go to the next state unless it's been long enough.
2607 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2608 if (time_after_eq(jiffies, next_time)) {
2609 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
2610 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2612 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2613 fip->port_ka_time = next_time;
2615 fcoe_ctlr_vn_disc(fip);
2617 case FIP_ST_VNMP_UP:
2618 next_time = fcoe_ctlr_vn_age(fip);
2619 if (time_after_eq(jiffies, fip->port_ka_time)) {
2620 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2622 fip->port_ka_time = jiffies +
2623 msecs_to_jiffies(FIP_VN_BEACON_INT +
2624 (random32() % FIP_VN_BEACON_FUZZ));
2626 if (time_before(fip->port_ka_time, next_time))
2627 next_time = fip->port_ka_time;
2629 case FIP_ST_LINK_WAIT:
2632 WARN(1, "unexpected state %d\n", fip->state);
2635 mod_timer(&fip->timer, next_time);
2637 mutex_unlock(&fip->ctlr_mutex);
2639 /* If port ID is new, notify local port after dropping ctlr_mutex */
2641 fc_lport_set_local_id(fip->lp, new_port_id);
2645 * fcoe_libfc_config() - Sets up libfc related properties for local port
2646 * @lp: The local port to configure libfc for
2647 * @fip: The FCoE controller in use by the local port
2648 * @tt: The libfc function template
2649 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
2651 * Returns : 0 for success
2653 int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
2654 const struct libfc_function_template *tt, int init_fcp)
2656 /* Set the function pointers set by the LLDD */
2657 memcpy(&lport->tt, tt, sizeof(*tt));
2658 if (init_fcp && fc_fcp_init(lport))
2660 fc_exch_init(lport);
2661 fc_elsct_init(lport);
2662 fc_lport_init(lport);
2663 if (fip->mode == FIP_MODE_VN2VN)
2664 lport->rport_priv_size = sizeof(struct fcoe_rport);
2665 fc_rport_init(lport);
2666 if (fip->mode == FIP_MODE_VN2VN) {
2667 lport->point_to_multipoint = 1;
2668 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
2669 lport->tt.disc_start = fcoe_ctlr_disc_start;
2670 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
2671 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
2672 mutex_init(&lport->disc.disc_mutex);
2673 INIT_LIST_HEAD(&lport->disc.rports);
2674 lport->disc.priv = fip;
2676 fc_disc_init(lport);
2680 EXPORT_SYMBOL_GPL(fcoe_libfc_config);