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1/*
2 * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
3 * Copyright (c) 2009 Intel Corporation. All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms and conditions of the GNU General Public License,
7 * version 2, as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * Maintained at www.Open-FCoE.org
19 */
20
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>
36
37#include <scsi/fc/fc_els.h>
38#include <scsi/fc/fc_fs.h>
39#include <scsi/fc/fc_fip.h>
40#include <scsi/fc/fc_encaps.h>
41#include <scsi/fc/fc_fcoe.h>
42#include <scsi/fc/fc_fcp.h>
43
44#include <scsi/libfc.h>
45#include <scsi/libfcoe.h>
46
47#include "libfcoe.h"
48
49#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
50#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
51
52static void fcoe_ctlr_timeout(unsigned long);
53static void fcoe_ctlr_timer_work(struct work_struct *);
54static void fcoe_ctlr_recv_work(struct work_struct *);
55static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
56
57static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
58static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
59static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
60static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
61
62static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
63static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
64static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
65static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
66
67static 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",
78};
79
80static const char *fcoe_ctlr_state(enum fip_state state)
81{
82 const char *cp = "unknown";
83
84 if (state < ARRAY_SIZE(fcoe_ctlr_states))
85 cp = fcoe_ctlr_states[state];
86 if (!cp)
87 cp = "unknown";
88 return cp;
89}
90
91/**
92 * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
93 * @fip: The FCoE controller
94 * @state: The new state
95 */
96static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
97{
98 if (state == fip->state)
99 return;
100 if (fip->lp)
101 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
102 fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
103 fip->state = state;
104}
105
106/**
107 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
108 * @fcf: The FCF to check
109 *
110 * Return non-zero if FCF fcoe_size has been validated.
111 */
112static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
113{
114 return (fcf->flags & FIP_FL_SOL) != 0;
115}
116
117/**
118 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
119 * @fcf: The FCF to check
120 *
121 * Return non-zero if the FCF is usable.
122 */
123static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
124{
125 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
126
127 return (fcf->flags & flags) == flags;
128}
129
130/**
131 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
132 * @fip: The FCoE controller
133 */
134static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
135{
136 if (fip->mode == FIP_MODE_VN2VN)
137 hton24(fip->dest_addr, FIP_VN_FC_MAP);
138 else
139 hton24(fip->dest_addr, FIP_DEF_FC_MAP);
140 hton24(fip->dest_addr + 3, 0);
141 fip->map_dest = 1;
142}
143
144/**
145 * fcoe_ctlr_init() - Initialize the FCoE Controller instance
146 * @fip: The FCoE controller to initialize
147 */
148void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_state mode)
149{
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);
160}
161EXPORT_SYMBOL(fcoe_ctlr_init);
162
163/**
164 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
165 * @fip: The FCoE controller whose FCFs are to be reset
166 *
167 * Called with &fcoe_ctlr lock held.
168 */
169static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
170{
171 struct fcoe_fcf *fcf;
172 struct fcoe_fcf *next;
173
174 fip->sel_fcf = NULL;
175 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
176 list_del(&fcf->list);
177 kfree(fcf);
178 }
179 fip->fcf_count = 0;
180 fip->sel_time = 0;
181}
182
183/**
184 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
185 * @fip: The FCoE controller to tear down
186 *
187 * This is called by FCoE drivers before freeing the &fcoe_ctlr.
188 *
189 * The receive handler will have been deleted before this to guarantee
190 * that no more recv_work will be scheduled.
191 *
192 * The timer routine will simply return once we set FIP_ST_DISABLED.
193 * This guarantees that no further timeouts or work will be scheduled.
194 */
195void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
196{
197 cancel_work_sync(&fip->recv_work);
198 skb_queue_purge(&fip->fip_recv_list);
199
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);
206}
207EXPORT_SYMBOL(fcoe_ctlr_destroy);
208
209/**
210 * fcoe_ctlr_announce() - announce new FCF selection
211 * @fip: The FCoE controller
212 *
213 * Also sets the destination MAC for FCoE and control packets
214 *
215 * Called with neither ctlr_mutex nor ctlr_lock held.
216 */
217static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
218{
219 struct fcoe_fcf *sel;
220 struct fcoe_fcf *fcf;
221
222 mutex_lock(&fip->ctlr_mutex);
223 spin_lock_bh(&fip->ctlr_lock);
224
225 kfree_skb(fip->flogi_req);
226 fip->flogi_req = NULL;
227 list_for_each_entry(fcf, &fip->fcfs, list)
228 fcf->flogi_sent = 0;
229
230 spin_unlock_bh(&fip->ctlr_lock);
231 sel = fip->sel_fcf;
232
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);
240 }
241 if (sel) {
242 printk(KERN_INFO "libfcoe: host%d: FIP selected "
243 "Fibre-Channel Forwarder MAC %pM\n",
244 fip->lp->host->host_no, sel->fcf_mac);
245 memcpy(fip->dest_addr, sel->fcf_mac, ETH_ALEN);
246 fip->map_dest = 0;
247 }
248unlock:
249 mutex_unlock(&fip->ctlr_mutex);
250}
251
252/**
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
255 *
256 * Returns the maximum packet size including the FCoE header and trailer,
257 * but not including any Ethernet or VLAN headers.
258 */
259static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
260{
261 /*
262 * Determine the max FCoE frame size allowed, including
263 * FCoE header and trailer.
264 * Note: lp->mfs is currently the payload size, not the frame size.
265 */
266 return fip->lp->mfs + sizeof(struct fc_frame_header) +
267 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
268}
269
270/**
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)
274 */
275static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
276{
277 struct sk_buff *skb;
278 struct fip_sol {
279 struct ethhdr eth;
280 struct fip_header fip;
281 struct {
282 struct fip_mac_desc mac;
283 struct fip_wwn_desc wwnn;
284 struct fip_size_desc size;
285 } __packed desc;
286 } __packed * sol;
287 u32 fcoe_size;
288
289 skb = dev_alloc_skb(sizeof(*sol));
290 if (!skb)
291 return;
292
293 sol = (struct fip_sol *)skb->data;
294
295 memset(sol, 0, sizeof(*sol));
296 memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
297 memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
298 sol->eth.h_proto = htons(ETH_P_FIP);
299
300 sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
301 sol->fip.fip_op = htons(FIP_OP_DISC);
302 sol->fip.fip_subcode = FIP_SC_SOL;
303 sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
304 sol->fip.fip_flags = htons(FIP_FL_FPMA);
305 if (fip->spma)
306 sol->fip.fip_flags |= htons(FIP_FL_SPMA);
307
308 sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
309 sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
310 memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
311
312 sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
313 sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
314 put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
315
316 fcoe_size = fcoe_ctlr_fcoe_size(fip);
317 sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
318 sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
319 sol->desc.size.fd_size = htons(fcoe_size);
320
321 skb_put(skb, sizeof(*sol));
322 skb->protocol = htons(ETH_P_FIP);
323 skb_reset_mac_header(skb);
324 skb_reset_network_header(skb);
325 fip->send(fip, skb);
326
327 if (!fcf)
328 fip->sol_time = jiffies;
329}
330
331/**
332 * fcoe_ctlr_link_up() - Start FCoE controller
333 * @fip: The FCoE controller to start
334 *
335 * Called from the LLD when the network link is ready.
336 */
337void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
338{
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;
363 }
364 } else
365 mutex_unlock(&fip->ctlr_mutex);
366}
367EXPORT_SYMBOL(fcoe_ctlr_link_up);
368
369/**
370 * fcoe_ctlr_reset() - Reset a FCoE controller
371 * @fip: The FCoE controller to reset
372 */
373static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
374{
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);
382}
383
384/**
385 * fcoe_ctlr_link_down() - Stop a FCoE controller
386 * @fip: The FCoE controller to be stopped
387 *
388 * Returns non-zero if the link was up and now isn't.
389 *
390 * Called from the LLD when the network link is not ready.
391 * There may be multiple calls while the link is down.
392 */
393int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
394{
395 int link_dropped;
396
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);
403
404 if (link_dropped)
405 fc_linkdown(fip->lp);
406 return link_dropped;
407}
408EXPORT_SYMBOL(fcoe_ctlr_link_down);
409
410/**
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
416 *
417 * A controller keep-alive is sent every fka_period (typically 8 seconds).
418 * The source MAC is the native MAC address.
419 *
420 * A port keep-alive is sent every 90 seconds while logged in.
421 * The source MAC is the assigned mapped source address.
422 * The destination is the FCF's F-port.
423 */
424static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
425 struct fc_lport *lport,
426 int ports, u8 *sa)
427{
428 struct sk_buff *skb;
429 struct fip_kal {
430 struct ethhdr eth;
431 struct fip_header fip;
432 struct fip_mac_desc mac;
433 } __packed * kal;
434 struct fip_vn_desc *vn;
435 u32 len;
436 struct fc_lport *lp;
437 struct fcoe_fcf *fcf;
438
439 fcf = fip->sel_fcf;
440 lp = fip->lp;
441 if (!fcf || (ports && !lp->port_id))
442 return;
443
444 len = sizeof(*kal) + ports * sizeof(*vn);
445 skb = dev_alloc_skb(len);
446 if (!skb)
447 return;
448
449 kal = (struct fip_kal *)skb->data;
450 memset(kal, 0, len);
451 memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
452 memcpy(kal->eth.h_source, sa, ETH_ALEN);
453 kal->eth.h_proto = htons(ETH_P_FIP);
454
455 kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
456 kal->fip.fip_op = htons(FIP_OP_CTRL);
457 kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
458 kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
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);
463
464 kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
465 kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
466 memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
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);
474 }
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);
480}
481
482/**
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.
488 *
489 * Returns non-zero error code on failure.
490 *
491 * The caller must check that the length is a multiple of 4.
492 *
493 * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
494 * Headroom includes the FIP encapsulation description, FIP header, and
495 * Ethernet header. The tailroom is for the FIP MAC descriptor.
496 */
497static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
498 u8 dtype, struct sk_buff *skb, u32 d_id)
499{
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;
511
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));
517
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);
532 }
533 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
534 cap->eth.h_proto = htons(ETH_P_FIP);
535
536 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
537 cap->fip.fip_op = htons(FIP_OP_LS);
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);
543
544 cap->encaps.fd_desc.fip_dtype = dtype;
545 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
546
547 if (op != ELS_LS_RJT) {
548 dlen += sizeof(*mac);
549 mac = (struct fip_mac_desc *)skb_put(skb, sizeof(*mac));
550 memset(mac, 0, sizeof(*mac));
551 mac->fd_desc.fip_dtype = FIP_DT_MAC;
552 mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
553 if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
554 memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
555 } else if (fip->mode == FIP_MODE_VN2VN) {
556 hton24(mac->fd_mac, FIP_VN_FC_MAP);
557 hton24(mac->fd_mac + 3, fip->port_id);
558 } else if (fip_flags & FIP_FL_SPMA) {
559 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
560 memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
561 } else {
562 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
563 /* FPMA only FLOGI. Must leave the MAC desc zeroed. */
564 }
565 }
566 cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
567
568 skb->protocol = htons(ETH_P_FIP);
569 skb_reset_mac_header(skb);
570 skb_reset_network_header(skb);
571 return 0;
572}
573
574/**
575 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
576 * @fip: FCoE controller.
577 * @lport: libfc fc_lport to send from
578 * @skb: FCoE ELS frame including FC header but no FCoE headers.
579 *
580 * Returns a non-zero error code if the frame should not be sent.
581 * Returns zero if the caller should send the frame with FCoE encapsulation.
582 *
583 * The caller must check that the length is a multiple of 4.
584 * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
585 * The the skb must also be an fc_frame.
586 *
587 * This is called from the lower-level driver with spinlocks held,
588 * so we must not take a mutex here.
589 */
590int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
591 struct sk_buff *skb)
592{
593 struct fc_frame *fp;
594 struct fc_frame_header *fh;
595 u16 old_xid;
596 u8 op;
597 u8 mac[ETH_ALEN];
598
599 fp = container_of(skb, struct fc_frame, skb);
600 fh = (struct fc_frame_header *)skb->data;
601 op = *(u8 *)(fh + 1);
602
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;
614 }
615 if (fip->state == FIP_ST_NON_FIP)
616 fcoe_ctlr_map_dest(fip);
617 }
618
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;
651 }
652 op = FIP_DT_LOGO;
653 break;
654 case ELS_LS_ACC:
655 /*
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.
661 */
662 if (fip->state == FIP_ST_NON_FIP) {
663 if (fip->flogi_oxid == FC_XID_UNKNOWN)
664 return 0;
665 fip->flogi_oxid = FC_XID_UNKNOWN;
666 fc_fcoe_set_mac(mac, fh->fh_d_id);
667 fip->update_mac(lport, mac);
668 }
669 /* fall through */
670 case ELS_LS_RJT:
671 op = fr_encaps(fp);
672 if (op)
673 break;
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;
680 }
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;
687drop:
688 kfree_skb(skb);
689 return -EINVAL;
690}
691EXPORT_SYMBOL(fcoe_ctlr_els_send);
692
693/**
694 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
695 * @fip: The FCoE controller to free FCFs on
696 *
697 * Called with lock held and preemption disabled.
698 *
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.
702 *
703 * In addition, determine the time when an FCF selection can occur.
704 *
705 * Also, increment the MissDiscAdvCount when no advertisement is received
706 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
707 *
708 * Returns the time in jiffies for the next call.
709 */
710static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
711{
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;
718
719 stats = per_cpu_ptr(fip->lp->dev_stats, get_cpu());
720
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;
733 }
734
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;
750 }
751 }
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;
756 }
757
758 return next_timer;
759}
760
761/**
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
766 *
767 * Returns zero on a valid parsed advertisement,
768 * otherwise returns non zero value.
769 */
770static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
771 struct sk_buff *skb, struct fcoe_fcf *fcf)
772{
773 struct fip_header *fiph;
774 struct fip_desc *desc = NULL;
775 struct fip_wwn_desc *wwn;
776 struct fip_fab_desc *fab;
777 struct fip_fka_desc *fka;
778 unsigned long t;
779 size_t rlen;
780 size_t dlen;
781 u32 desc_mask;
782
783 memset(fcf, 0, sizeof(*fcf));
784 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
785
786 fiph = (struct fip_header *)skb->data;
787 fcf->flags = ntohs(fiph->fip_flags);
788
789 /*
790 * mask of required descriptors. validating each one clears its bit.
791 */
792 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
793 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
794
795 rlen = ntohs(fiph->fip_dl_len) * 4;
796 if (rlen + sizeof(*fiph) > skb->len)
797 return -EINVAL;
798
799 desc = (struct fip_desc *)(fiph + 1);
800 while (rlen > 0) {
801 dlen = desc->fip_dlen * FIP_BPW;
802 if (dlen < sizeof(*desc) || dlen > rlen)
803 return -EINVAL;
804 /* Drop Adv if there are duplicate critical descriptors */
805 if ((desc->fip_dtype < 32) &&
806 !(desc_mask & 1U << desc->fip_dtype)) {
807 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
808 "Descriptors in FIP adv\n");
809 return -EINVAL;
810 }
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;
829 }
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;
872 }
873 desc = (struct fip_desc *)((char *)desc + dlen);
874 rlen -= dlen;
875 }
876 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
877 return -EINVAL;
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;
884 }
885 return 0;
886
887len_err:
888 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
889 desc->fip_dtype, dlen);
890 return -EINVAL;
891}
892
893/**
894 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
895 * @fip: The FCoE controller receiving the advertisement
896 * @skb: The received FIP packet
897 */
898static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
899{
900 struct fcoe_fcf *fcf;
901 struct fcoe_fcf new;
902 struct fcoe_fcf *found;
903 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTRL_SOL_TOV);
904 int first = 0;
905 int mtu_valid;
906
907 if (fcoe_ctlr_parse_adv(fip, skb, &new))
908 return;
909
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;
920 }
921 }
922 if (!found) {
923 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
924 goto out;
925
926 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
927 if (!fcf)
928 goto out;
929
930 fip->fcf_count++;
931 memcpy(fcf, &new, sizeof(new));
932 list_add(&fcf->list, &fip->fcfs);
933 } else {
934 /*
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).
939 */
940 fcf->fd_flags = new.fd_flags;
941 if (!fcoe_ctlr_fcf_usable(fcf))
942 fcf->flags = new.flags;
943
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);
949 }
950 fcf->fka_period = new.fka_period;
951 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
952 }
953 mtu_valid = fcoe_ctlr_mtu_valid(fcf);
954 fcf->time = jiffies;
955 if (!found)
956 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
957 fcf->fabric_name, fcf->fcf_mac);
958
959 /*
960 * If this advertisement is not solicited and our max receive size
961 * hasn't been verified, send a solicited advertisement.
962 */
963 if (!mtu_valid)
964 fcoe_ctlr_solicit(fip, fcf);
965
966 /*
967 * If its been a while since we did a solicit, and this is
968 * the first advertisement we've received, do a multicast
969 * solicitation to gather as many advertisements as we can
970 * before selection occurs.
971 */
972 if (first && time_after(jiffies, fip->sol_time + sol_tov))
973 fcoe_ctlr_solicit(fip, NULL);
974
975 /*
976 * Put this FCF at the head of the list for priority among equals.
977 * This helps in the case of an NPV switch which insists we use
978 * the FCF that answers multicast solicitations, not the others that
979 * are sending periodic multicast advertisements.
980 */
981 if (mtu_valid)
982 list_move(&fcf->list, &fip->fcfs);
983
984 /*
985 * If this is the first validated FCF, note the time and
986 * set a timer to trigger selection.
987 */
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);
994 }
995out:
996 mutex_unlock(&fip->ctlr_mutex);
997}
998
999/**
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
1003 */
1004static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1005{
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;
1014 u8 els_op;
1015 u8 sub;
1016 u8 granted_mac[ETH_ALEN] = { 0 };
1017 size_t els_len = 0;
1018 size_t rlen;
1019 size_t dlen;
1020 u32 desc_mask = 0;
1021 u32 desc_cnt = 0;
1022
1023 fiph = (struct fip_header *)skb->data;
1024 sub = fiph->fip_subcode;
1025 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1026 goto drop;
1027
1028 rlen = ntohs(fiph->fip_dl_len) * 4;
1029 if (rlen + sizeof(*fiph) > skb->len)
1030 goto drop;
1031
1032 desc = (struct fip_desc *)(fiph + 1);
1033 while (rlen > 0) {
1034 desc_cnt++;
1035 dlen = desc->fip_dlen * FIP_BPW;
1036 if (dlen < sizeof(*desc) || dlen > rlen)
1037 goto drop;
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");
1043 goto drop;
1044 }
1045 desc_mask |= (1 << desc->fip_dtype);
1046 }
1047 switch (desc->fip_dtype) {
1048 case FIP_DT_MAC:
1049 if (desc_cnt == 1) {
1050 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1051 "received out of order\n");
1052 goto drop;
1053 }
1054
1055 if (dlen != sizeof(struct fip_mac_desc))
1056 goto len_err;
1057 memcpy(granted_mac,
1058 ((struct fip_mac_desc *)desc)->fd_mac,
1059 ETH_ALEN);
1060 break;
1061 case FIP_DT_FLOGI:
1062 case FIP_DT_FDISC:
1063 case FIP_DT_LOGO:
1064 case FIP_DT_ELP:
1065 if (desc_cnt != 1) {
1066 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1067 "received out of order\n");
1068 goto drop;
1069 }
1070 if (fh)
1071 goto drop;
1072 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1073 goto len_err;
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;
1078 break;
1079 default:
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)
1084 goto drop;
1085 if (desc_cnt <= 2) {
1086 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1087 "received out of order\n");
1088 goto drop;
1089 }
1090 break;
1091 }
1092 desc = (struct fip_desc *)((char *)desc + dlen);
1093 rlen -= dlen;
1094 }
1095
1096 if (!fh)
1097 goto drop;
1098 els_op = *(u8 *)(fh + 1);
1099
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",
1106 granted_mac);
1107 goto drop;
1108 }
1109 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1110
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);
1115 }
1116 } else if (els_dtype == FIP_DT_FLOGI &&
1117 !fcoe_ctlr_flogi_retry(fip))
1118 goto drop; /* retrying FLOGI so drop reject */
1119 }
1120
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 "
1124 "in FIP ELS\n");
1125 goto drop;
1126 }
1127
1128 /*
1129 * Convert skb into an fc_frame containing only the ELS.
1130 */
1131 skb_pull(skb, (u8 *)fh - skb->data);
1132 skb_trim(skb, els_len);
1133 fp = (struct fc_frame *)skb;
1134 fc_frame_init(fp);
1135 fr_sof(fp) = FC_SOF_I3;
1136 fr_eof(fp) = FC_EOF_T;
1137 fr_dev(fp) = lport;
1138 fr_encaps(fp) = els_dtype;
1139
1140 stats = per_cpu_ptr(lport->dev_stats, get_cpu());
1141 stats->RxFrames++;
1142 stats->RxWords += skb->len / FIP_BPW;
1143 put_cpu();
1144
1145 fc_exch_recv(lport, fp);
1146 return;
1147
1148len_err:
1149 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1150 desc->fip_dtype, dlen);
1151drop:
1152 kfree_skb(skb);
1153}
1154
1155/**
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
1159 *
1160 * There may be multiple VN_Port descriptors.
1161 * The overall length has already been checked.
1162 */
1163static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1164 struct fip_header *fh)
1165{
1166 struct fip_desc *desc;
1167 struct fip_mac_desc *mp;
1168 struct fip_wwn_desc *wp;
1169 struct fip_vn_desc *vp;
1170 size_t rlen;
1171 size_t dlen;
1172 struct fcoe_fcf *fcf = fip->sel_fcf;
1173 struct fc_lport *lport = fip->lp;
1174 struct fc_lport *vn_port = NULL;
1175 u32 desc_mask;
1176 int num_vlink_desc;
1177 int reset_phys_port = 0;
1178 struct fip_vn_desc **vlink_desc_arr = NULL;
1179
1180 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1181
1182 if (!fcf || !lport->port_id)
1183 return;
1184
1185 /*
1186 * mask of required descriptors. Validating each one clears its bit.
1187 */
1188 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
1189
1190 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1191 desc = (struct fip_desc *)(fh + 1);
1192
1193 /*
1194 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
1195 * before determining max Vx_Port descriptor but a buggy FCF could have
1196 * omited either or both MAC Address and Name Identifier descriptors
1197 */
1198 num_vlink_desc = rlen / sizeof(*vp);
1199 if (num_vlink_desc)
1200 vlink_desc_arr = kmalloc(sizeof(vp) * num_vlink_desc,
1201 GFP_ATOMIC);
1202 if (!vlink_desc_arr)
1203 return;
1204 num_vlink_desc = 0;
1205
1206 while (rlen >= sizeof(*desc)) {
1207 dlen = desc->fip_dlen * FIP_BPW;
1208 if (dlen > rlen)
1209 goto err;
1210 /* Drop CVL if there are duplicate critical descriptors */
1211 if ((desc->fip_dtype < 32) &&
1212 (desc->fip_dtype != FIP_DT_VN_ID) &&
1213 !(desc_mask & 1U << desc->fip_dtype)) {
1214 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1215 "Descriptors in FIP CVL\n");
1216 goto err;
1217 }
1218 switch (desc->fip_dtype) {
1219 case FIP_DT_MAC:
1220 mp = (struct fip_mac_desc *)desc;
1221 if (dlen < sizeof(*mp))
1222 goto err;
1223 if (compare_ether_addr(mp->fd_mac, fcf->fcf_mac))
1224 goto err;
1225 desc_mask &= ~BIT(FIP_DT_MAC);
1226 break;
1227 case FIP_DT_NAME:
1228 wp = (struct fip_wwn_desc *)desc;
1229 if (dlen < sizeof(*wp))
1230 goto err;
1231 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1232 goto err;
1233 desc_mask &= ~BIT(FIP_DT_NAME);
1234 break;
1235 case FIP_DT_VN_ID:
1236 vp = (struct fip_vn_desc *)desc;
1237 if (dlen < sizeof(*vp))
1238 goto err;
1239 vlink_desc_arr[num_vlink_desc++] = vp;
1240 vn_port = fc_vport_id_lookup(lport,
1241 ntoh24(vp->fd_fc_id));
1242 if (vn_port && (vn_port == lport)) {
1243 mutex_lock(&fip->ctlr_mutex);
1244 per_cpu_ptr(lport->dev_stats,
1245 get_cpu())->VLinkFailureCount++;
1246 put_cpu();
1247 fcoe_ctlr_reset(fip);
1248 mutex_unlock(&fip->ctlr_mutex);
1249 }
1250 break;
1251 default:
1252 /* standard says ignore unknown descriptors >= 128 */
1253 if (desc->fip_dtype < FIP_DT_VENDOR_BASE)
1254 goto err;
1255 break;
1256 }
1257 desc = (struct fip_desc *)((char *)desc + dlen);
1258 rlen -= dlen;
1259 }
1260
1261 /*
1262 * reset only if all required descriptors were present and valid.
1263 */
1264 if (desc_mask)
1265 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1266 desc_mask);
1267 else if (!num_vlink_desc) {
1268 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
1269 /*
1270 * No Vx_Port description. Clear all NPIV ports,
1271 * followed by physical port
1272 */
1273 mutex_lock(&lport->lp_mutex);
1274 list_for_each_entry(vn_port, &lport->vports, list)
1275 fc_lport_reset(vn_port);
1276 mutex_unlock(&lport->lp_mutex);
1277
1278 mutex_lock(&fip->ctlr_mutex);
1279 per_cpu_ptr(lport->dev_stats,
1280 get_cpu())->VLinkFailureCount++;
1281 put_cpu();
1282 fcoe_ctlr_reset(fip);
1283 mutex_unlock(&fip->ctlr_mutex);
1284
1285 fc_lport_reset(fip->lp);
1286 fcoe_ctlr_solicit(fip, NULL);
1287 } else {
1288 int i;
1289
1290 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1291 for (i = 0; i < num_vlink_desc; i++) {
1292 vp = vlink_desc_arr[i];
1293 vn_port = fc_vport_id_lookup(lport,
1294 ntoh24(vp->fd_fc_id));
1295 if (!vn_port)
1296 continue;
1297
1298 /*
1299 * 'port_id' is already validated, check MAC address and
1300 * wwpn
1301 */
1302 if (compare_ether_addr(fip->get_src_addr(vn_port),
1303 vp->fd_mac) != 0 ||
1304 get_unaligned_be64(&vp->fd_wwpn) !=
1305 vn_port->wwpn)
1306 continue;
1307
1308 if (vn_port == lport)
1309 /*
1310 * Physical port, defer processing till all
1311 * listed NPIV ports are cleared
1312 */
1313 reset_phys_port = 1;
1314 else /* NPIV port */
1315 fc_lport_reset(vn_port);
1316 }
1317
1318 if (reset_phys_port) {
1319 fc_lport_reset(fip->lp);
1320 fcoe_ctlr_solicit(fip, NULL);
1321 }
1322 }
1323
1324err:
1325 kfree(vlink_desc_arr);
1326}
1327
1328/**
1329 * fcoe_ctlr_recv() - Receive a FIP packet
1330 * @fip: The FCoE controller that received the packet
1331 * @skb: The received FIP packet
1332 *
1333 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1334 */
1335void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1336{
1337 skb_queue_tail(&fip->fip_recv_list, skb);
1338 schedule_work(&fip->recv_work);
1339}
1340EXPORT_SYMBOL(fcoe_ctlr_recv);
1341
1342/**
1343 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1344 * @fip: The FCoE controller that received the frame
1345 * @skb: The received FIP frame
1346 *
1347 * Returns non-zero if the frame is dropped.
1348 */
1349static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1350{
1351 struct fip_header *fiph;
1352 struct ethhdr *eh;
1353 enum fip_state state;
1354 u16 op;
1355 u8 sub;
1356
1357 if (skb_linearize(skb))
1358 goto drop;
1359 if (skb->len < sizeof(*fiph))
1360 goto drop;
1361 eh = eth_hdr(skb);
1362 if (fip->mode == FIP_MODE_VN2VN) {
1363 if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
1364 compare_ether_addr(eh->h_dest, fcoe_all_vn2vn) &&
1365 compare_ether_addr(eh->h_dest, fcoe_all_p2p))
1366 goto drop;
1367 } else if (compare_ether_addr(eh->h_dest, fip->ctl_src_addr) &&
1368 compare_ether_addr(eh->h_dest, fcoe_all_enode))
1369 goto drop;
1370 fiph = (struct fip_header *)skb->data;
1371 op = ntohs(fiph->fip_op);
1372 sub = fiph->fip_subcode;
1373
1374 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1375 goto drop;
1376 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1377 goto drop;
1378
1379 mutex_lock(&fip->ctlr_mutex);
1380 state = fip->state;
1381 if (state == FIP_ST_AUTO) {
1382 fip->map_dest = 0;
1383 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1384 state = FIP_ST_ENABLED;
1385 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1386 }
1387 mutex_unlock(&fip->ctlr_mutex);
1388
1389 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1390 return fcoe_ctlr_vn_recv(fip, skb);
1391
1392 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1393 state != FIP_ST_VNMP_CLAIM)
1394 goto drop;
1395
1396 if (op == FIP_OP_LS) {
1397 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1398 return 0;
1399 }
1400
1401 if (state != FIP_ST_ENABLED)
1402 goto drop;
1403
1404 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1405 fcoe_ctlr_recv_adv(fip, skb);
1406 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1407 fcoe_ctlr_recv_clr_vlink(fip, fiph);
1408 kfree_skb(skb);
1409 return 0;
1410drop:
1411 kfree_skb(skb);
1412 return -1;
1413}
1414
1415/**
1416 * fcoe_ctlr_select() - Select the best FCF (if possible)
1417 * @fip: The FCoE controller
1418 *
1419 * Returns the selected FCF, or NULL if none are usable.
1420 *
1421 * If there are conflicting advertisements, no FCF can be chosen.
1422 *
1423 * If there is already a selected FCF, this will choose a better one or
1424 * an equivalent one that hasn't already been sent a FLOGI.
1425 *
1426 * Called with lock held.
1427 */
1428static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1429{
1430 struct fcoe_fcf *fcf;
1431 struct fcoe_fcf *best = fip->sel_fcf;
1432 struct fcoe_fcf *first;
1433
1434 first = list_first_entry(&fip->fcfs, struct fcoe_fcf, list);
1435
1436 list_for_each_entry(fcf, &fip->fcfs, list) {
1437 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1438 "VFID %d mac %pM map %x val %d "
1439 "sent %u pri %u\n",
1440 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1441 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1442 fcf->flogi_sent, fcf->pri);
1443 if (fcf->fabric_name != first->fabric_name ||
1444 fcf->vfid != first->vfid ||
1445 fcf->fc_map != first->fc_map) {
1446 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1447 "or FC-MAP\n");
1448 return NULL;
1449 }
1450 if (fcf->flogi_sent)
1451 continue;
1452 if (!fcoe_ctlr_fcf_usable(fcf)) {
1453 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1454 "map %x %svalid %savailable\n",
1455 fcf->fabric_name, fcf->fc_map,
1456 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1457 (fcf->flags & FIP_FL_AVAIL) ?
1458 "" : "un");
1459 continue;
1460 }
1461 if (!best || fcf->pri < best->pri || best->flogi_sent)
1462 best = fcf;
1463 }
1464 fip->sel_fcf = best;
1465 if (best) {
1466 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1467 fip->port_ka_time = jiffies +
1468 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1469 fip->ctlr_ka_time = jiffies + best->fka_period;
1470 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1471 mod_timer(&fip->timer, fip->ctlr_ka_time);
1472 }
1473 return best;
1474}
1475
1476/**
1477 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1478 * @fip: The FCoE controller
1479 *
1480 * Returns non-zero error if it could not be sent.
1481 *
1482 * Called with ctlr_mutex and ctlr_lock held.
1483 * Caller must verify that fip->sel_fcf is not NULL.
1484 */
1485static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1486{
1487 struct sk_buff *skb;
1488 struct sk_buff *skb_orig;
1489 struct fc_frame_header *fh;
1490 int error;
1491
1492 skb_orig = fip->flogi_req;
1493 if (!skb_orig)
1494 return -EINVAL;
1495
1496 /*
1497 * Clone and send the FLOGI request. If clone fails, use original.
1498 */
1499 skb = skb_clone(skb_orig, GFP_ATOMIC);
1500 if (!skb) {
1501 skb = skb_orig;
1502 fip->flogi_req = NULL;
1503 }
1504 fh = (struct fc_frame_header *)skb->data;
1505 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1506 ntoh24(fh->fh_d_id));
1507 if (error) {
1508 kfree_skb(skb);
1509 return error;
1510 }
1511 fip->send(fip, skb);
1512 fip->sel_fcf->flogi_sent = 1;
1513 return 0;
1514}
1515
1516/**
1517 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1518 * @fip: The FCoE controller
1519 *
1520 * Returns non-zero error code if there's no FLOGI request to retry or
1521 * no alternate FCF available.
1522 */
1523static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1524{
1525 struct fcoe_fcf *fcf;
1526 int error;
1527
1528 mutex_lock(&fip->ctlr_mutex);
1529 spin_lock_bh(&fip->ctlr_lock);
1530 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1531 fcf = fcoe_ctlr_select(fip);
1532 if (!fcf || fcf->flogi_sent) {
1533 kfree_skb(fip->flogi_req);
1534 fip->flogi_req = NULL;
1535 error = -ENOENT;
1536 } else {
1537 fcoe_ctlr_solicit(fip, NULL);
1538 error = fcoe_ctlr_flogi_send_locked(fip);
1539 }
1540 spin_unlock_bh(&fip->ctlr_lock);
1541 mutex_unlock(&fip->ctlr_mutex);
1542 return error;
1543}
1544
1545
1546/**
1547 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1548 * @fip: The FCoE controller that timed out
1549 *
1550 * Done here because fcoe_ctlr_els_send() can't get mutex.
1551 *
1552 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1553 */
1554static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1555{
1556 struct fcoe_fcf *fcf;
1557
1558 spin_lock_bh(&fip->ctlr_lock);
1559 fcf = fip->sel_fcf;
1560 if (!fcf || !fip->flogi_req_send)
1561 goto unlock;
1562
1563 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1564
1565 /*
1566 * If this FLOGI is being sent due to a timeout retry
1567 * to the same FCF as before, select a different FCF if possible.
1568 */
1569 if (fcf->flogi_sent) {
1570 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1571 fcf = fcoe_ctlr_select(fip);
1572 if (!fcf || fcf->flogi_sent) {
1573 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1574 list_for_each_entry(fcf, &fip->fcfs, list)
1575 fcf->flogi_sent = 0;
1576 fcf = fcoe_ctlr_select(fip);
1577 }
1578 }
1579 if (fcf) {
1580 fcoe_ctlr_flogi_send_locked(fip);
1581 fip->flogi_req_send = 0;
1582 } else /* XXX */
1583 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1584unlock:
1585 spin_unlock_bh(&fip->ctlr_lock);
1586}
1587
1588/**
1589 * fcoe_ctlr_timeout() - FIP timeout handler
1590 * @arg: The FCoE controller that timed out
1591 */
1592static void fcoe_ctlr_timeout(unsigned long arg)
1593{
1594 struct fcoe_ctlr *fip = (struct fcoe_ctlr *)arg;
1595
1596 schedule_work(&fip->timer_work);
1597}
1598
1599/**
1600 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1601 * @work: Handle to a FCoE controller
1602 *
1603 * Ages FCFs. Triggers FCF selection if possible.
1604 * Sends keep-alives and resets.
1605 */
1606static void fcoe_ctlr_timer_work(struct work_struct *work)
1607{
1608 struct fcoe_ctlr *fip;
1609 struct fc_lport *vport;
1610 u8 *mac;
1611 u8 reset = 0;
1612 u8 send_ctlr_ka = 0;
1613 u8 send_port_ka = 0;
1614 struct fcoe_fcf *sel;
1615 struct fcoe_fcf *fcf;
1616 unsigned long next_timer;
1617
1618 fip = container_of(work, struct fcoe_ctlr, timer_work);
1619 if (fip->mode == FIP_MODE_VN2VN)
1620 return fcoe_ctlr_vn_timeout(fip);
1621 mutex_lock(&fip->ctlr_mutex);
1622 if (fip->state == FIP_ST_DISABLED) {
1623 mutex_unlock(&fip->ctlr_mutex);
1624 return;
1625 }
1626
1627 fcf = fip->sel_fcf;
1628 next_timer = fcoe_ctlr_age_fcfs(fip);
1629
1630 sel = fip->sel_fcf;
1631 if (!sel && fip->sel_time) {
1632 if (time_after_eq(jiffies, fip->sel_time)) {
1633 sel = fcoe_ctlr_select(fip);
1634 fip->sel_time = 0;
1635 } else if (time_after(next_timer, fip->sel_time))
1636 next_timer = fip->sel_time;
1637 }
1638
1639 if (sel && fip->flogi_req_send)
1640 fcoe_ctlr_flogi_send(fip);
1641 else if (!sel && fcf)
1642 reset = 1;
1643
1644 if (sel && !sel->fd_flags) {
1645 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1646 fip->ctlr_ka_time = jiffies + sel->fka_period;
1647 send_ctlr_ka = 1;
1648 }
1649 if (time_after(next_timer, fip->ctlr_ka_time))
1650 next_timer = fip->ctlr_ka_time;
1651
1652 if (time_after_eq(jiffies, fip->port_ka_time)) {
1653 fip->port_ka_time = jiffies +
1654 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1655 send_port_ka = 1;
1656 }
1657 if (time_after(next_timer, fip->port_ka_time))
1658 next_timer = fip->port_ka_time;
1659 }
1660 if (!list_empty(&fip->fcfs))
1661 mod_timer(&fip->timer, next_timer);
1662 mutex_unlock(&fip->ctlr_mutex);
1663
1664 if (reset) {
1665 fc_lport_reset(fip->lp);
1666 /* restart things with a solicitation */
1667 fcoe_ctlr_solicit(fip, NULL);
1668 }
1669
1670 if (send_ctlr_ka)
1671 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1672
1673 if (send_port_ka) {
1674 mutex_lock(&fip->lp->lp_mutex);
1675 mac = fip->get_src_addr(fip->lp);
1676 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1677 list_for_each_entry(vport, &fip->lp->vports, list) {
1678 mac = fip->get_src_addr(vport);
1679 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1680 }
1681 mutex_unlock(&fip->lp->lp_mutex);
1682 }
1683}
1684
1685/**
1686 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1687 * @recv_work: Handle to a FCoE controller
1688 */
1689static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1690{
1691 struct fcoe_ctlr *fip;
1692 struct sk_buff *skb;
1693
1694 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1695 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1696 fcoe_ctlr_recv_handler(fip, skb);
1697}
1698
1699/**
1700 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1701 * @fip: The FCoE controller
1702 * @fp: The FC frame to snoop
1703 *
1704 * Snoop potential response to FLOGI or even incoming FLOGI.
1705 *
1706 * The caller has checked that we are waiting for login as indicated
1707 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1708 *
1709 * The caller is responsible for freeing the frame.
1710 * Fill in the granted_mac address.
1711 *
1712 * Return non-zero if the frame should not be delivered to libfc.
1713 */
1714int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1715 struct fc_frame *fp)
1716{
1717 struct fc_frame_header *fh;
1718 u8 op;
1719 u8 *sa;
1720
1721 sa = eth_hdr(&fp->skb)->h_source;
1722 fh = fc_frame_header_get(fp);
1723 if (fh->fh_type != FC_TYPE_ELS)
1724 return 0;
1725
1726 op = fc_frame_payload_op(fp);
1727 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1728 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1729
1730 mutex_lock(&fip->ctlr_mutex);
1731 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1732 mutex_unlock(&fip->ctlr_mutex);
1733 return -EINVAL;
1734 }
1735 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1736 LIBFCOE_FIP_DBG(fip,
1737 "received FLOGI LS_ACC using non-FIP mode\n");
1738
1739 /*
1740 * FLOGI accepted.
1741 * If the src mac addr is FC_OUI-based, then we mark the
1742 * address_mode flag to use FC_OUI-based Ethernet DA.
1743 * Otherwise we use the FCoE gateway addr
1744 */
1745 if (!compare_ether_addr(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1746 fcoe_ctlr_map_dest(fip);
1747 } else {
1748 memcpy(fip->dest_addr, sa, ETH_ALEN);
1749 fip->map_dest = 0;
1750 }
1751 fip->flogi_oxid = FC_XID_UNKNOWN;
1752 mutex_unlock(&fip->ctlr_mutex);
1753 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1754 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1755 /*
1756 * Save source MAC for point-to-point responses.
1757 */
1758 mutex_lock(&fip->ctlr_mutex);
1759 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1760 memcpy(fip->dest_addr, sa, ETH_ALEN);
1761 fip->map_dest = 0;
1762 if (fip->state == FIP_ST_AUTO)
1763 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1764 "Setting non-FIP mode\n");
1765 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1766 }
1767 mutex_unlock(&fip->ctlr_mutex);
1768 }
1769 return 0;
1770}
1771EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1772
1773/**
1774 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1775 * @mac: The MAC address to convert
1776 * @scheme: The scheme to use when converting
1777 * @port: The port indicator for converting
1778 *
1779 * Returns: u64 fc world wide name
1780 */
1781u64 fcoe_wwn_from_mac(unsigned char mac[MAX_ADDR_LEN],
1782 unsigned int scheme, unsigned int port)
1783{
1784 u64 wwn;
1785 u64 host_mac;
1786
1787 /* The MAC is in NO, so flip only the low 48 bits */
1788 host_mac = ((u64) mac[0] << 40) |
1789 ((u64) mac[1] << 32) |
1790 ((u64) mac[2] << 24) |
1791 ((u64) mac[3] << 16) |
1792 ((u64) mac[4] << 8) |
1793 (u64) mac[5];
1794
1795 WARN_ON(host_mac >= (1ULL << 48));
1796 wwn = host_mac | ((u64) scheme << 60);
1797 switch (scheme) {
1798 case 1:
1799 WARN_ON(port != 0);
1800 break;
1801 case 2:
1802 WARN_ON(port >= 0xfff);
1803 wwn |= (u64) port << 48;
1804 break;
1805 default:
1806 WARN_ON(1);
1807 break;
1808 }
1809
1810 return wwn;
1811}
1812EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1813
1814/**
1815 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1816 * @rdata: libfc remote port
1817 */
1818static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
1819{
1820 return (struct fcoe_rport *)(rdata + 1);
1821}
1822
1823/**
1824 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
1825 * @fip: The FCoE controller
1826 * @sub: sub-opcode for probe request, reply, or advertisement.
1827 * @dest: The destination Ethernet MAC address
1828 * @min_len: minimum size of the Ethernet payload to be sent
1829 */
1830static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
1831 enum fip_vn2vn_subcode sub,
1832 const u8 *dest, size_t min_len)
1833{
1834 struct sk_buff *skb;
1835 struct fip_frame {
1836 struct ethhdr eth;
1837 struct fip_header fip;
1838 struct fip_mac_desc mac;
1839 struct fip_wwn_desc wwnn;
1840 struct fip_vn_desc vn;
1841 } __packed * frame;
1842 struct fip_fc4_feat *ff;
1843 struct fip_size_desc *size;
1844 u32 fcp_feat;
1845 size_t len;
1846 size_t dlen;
1847
1848 len = sizeof(*frame);
1849 dlen = 0;
1850 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
1851 dlen = sizeof(struct fip_fc4_feat) +
1852 sizeof(struct fip_size_desc);
1853 len += dlen;
1854 }
1855 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
1856 len = max(len, min_len + sizeof(struct ethhdr));
1857
1858 skb = dev_alloc_skb(len);
1859 if (!skb)
1860 return;
1861
1862 frame = (struct fip_frame *)skb->data;
1863 memset(frame, 0, len);
1864 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
1865 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
1866 frame->eth.h_proto = htons(ETH_P_FIP);
1867
1868 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
1869 frame->fip.fip_op = htons(FIP_OP_VN2VN);
1870 frame->fip.fip_subcode = sub;
1871 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
1872
1873 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
1874 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
1875 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
1876
1877 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
1878 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
1879 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
1880
1881 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
1882 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
1883 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
1884 hton24(frame->vn.fd_mac + 3, fip->port_id);
1885 hton24(frame->vn.fd_fc_id, fip->port_id);
1886 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
1887
1888 /*
1889 * For claims, add FC-4 features.
1890 * TBD: Add interface to get fc-4 types and features from libfc.
1891 */
1892 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
1893 ff = (struct fip_fc4_feat *)(frame + 1);
1894 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
1895 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
1896 ff->fd_fts = fip->lp->fcts;
1897
1898 fcp_feat = 0;
1899 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
1900 fcp_feat |= FCP_FEAT_INIT;
1901 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
1902 fcp_feat |= FCP_FEAT_TARG;
1903 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
1904 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
1905
1906 size = (struct fip_size_desc *)(ff + 1);
1907 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
1908 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
1909 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
1910 }
1911
1912 skb_put(skb, len);
1913 skb->protocol = htons(ETH_P_FIP);
1914 skb_reset_mac_header(skb);
1915 skb_reset_network_header(skb);
1916
1917 fip->send(fip, skb);
1918}
1919
1920/**
1921 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
1922 * @lport: The lport which is receiving the event
1923 * @rdata: remote port private data
1924 * @event: The event that occurred
1925 *
1926 * Locking Note: The rport lock must not be held when calling this function.
1927 */
1928static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
1929 struct fc_rport_priv *rdata,
1930 enum fc_rport_event event)
1931{
1932 struct fcoe_ctlr *fip = lport->disc.priv;
1933 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
1934
1935 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
1936 rdata->ids.port_id, event);
1937
1938 mutex_lock(&fip->ctlr_mutex);
1939 switch (event) {
1940 case RPORT_EV_READY:
1941 frport->login_count = 0;
1942 break;
1943 case RPORT_EV_LOGO:
1944 case RPORT_EV_FAILED:
1945 case RPORT_EV_STOP:
1946 frport->login_count++;
1947 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
1948 LIBFCOE_FIP_DBG(fip,
1949 "rport FLOGI limited port_id %6.6x\n",
1950 rdata->ids.port_id);
1951 lport->tt.rport_logoff(rdata);
1952 }
1953 break;
1954 default:
1955 break;
1956 }
1957 mutex_unlock(&fip->ctlr_mutex);
1958}
1959
1960static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
1961 .event_callback = fcoe_ctlr_vn_rport_callback,
1962};
1963
1964/**
1965 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
1966 * @fip: The FCoE controller
1967 *
1968 * Called with ctlr_mutex held.
1969 */
1970static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
1971{
1972 mutex_lock(&lport->disc.disc_mutex);
1973 lport->disc.disc_callback = NULL;
1974 mutex_unlock(&lport->disc.disc_mutex);
1975}
1976
1977/**
1978 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
1979 * @fip: The FCoE controller
1980 *
1981 * Called through the local port template for discovery.
1982 * Called without the ctlr_mutex held.
1983 */
1984static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
1985{
1986 struct fcoe_ctlr *fip = lport->disc.priv;
1987
1988 mutex_lock(&fip->ctlr_mutex);
1989 fcoe_ctlr_disc_stop_locked(lport);
1990 mutex_unlock(&fip->ctlr_mutex);
1991}
1992
1993/**
1994 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
1995 * @fip: The FCoE controller
1996 *
1997 * Called through the local port template for discovery.
1998 * Called without the ctlr_mutex held.
1999 */
2000static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
2001{
2002 fcoe_ctlr_disc_stop(lport);
2003 lport->tt.rport_flush_queue();
2004 synchronize_rcu();
2005}
2006
2007/**
2008 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
2009 * @fip: The FCoE controller
2010 *
2011 * Called with fcoe_ctlr lock held.
2012 */
2013static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
2014{
2015 unsigned long wait;
2016 u32 port_id;
2017
2018 fcoe_ctlr_disc_stop_locked(fip->lp);
2019
2020 /*
2021 * Get proposed port ID.
2022 * If this is the first try after link up, use any previous port_id.
2023 * If there was none, use the low bits of the port_name.
2024 * On subsequent tries, get the next random one.
2025 * Don't use reserved IDs, use another non-zero value, just as random.
2026 */
2027 port_id = fip->port_id;
2028 if (fip->probe_tries)
2029 port_id = prandom32(&fip->rnd_state) & 0xffff;
2030 else if (!port_id)
2031 port_id = fip->lp->wwpn & 0xffff;
2032 if (!port_id || port_id == 0xffff)
2033 port_id = 1;
2034 fip->port_id = port_id;
2035
2036 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
2037 fip->probe_tries++;
2038 wait = random32() % FIP_VN_PROBE_WAIT;
2039 } else
2040 wait = FIP_VN_RLIM_INT;
2041 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
2042 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
2043}
2044
2045/**
2046 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2047 * @fip: The FCoE controller
2048 *
2049 * Called with fcoe_ctlr lock held.
2050 */
2051static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2052{
2053 fip->probe_tries = 0;
2054 prandom32_seed(&fip->rnd_state, fip->lp->wwpn);
2055 fcoe_ctlr_vn_restart(fip);
2056}
2057
2058/**
2059 * fcoe_ctlr_vn_parse - parse probe request or response
2060 * @fip: The FCoE controller
2061 * @skb: incoming packet
2062 * @rdata: buffer for resulting parsed VN entry plus fcoe_rport
2063 *
2064 * Returns non-zero error number on error.
2065 * Does not consume the packet.
2066 */
2067static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2068 struct sk_buff *skb,
2069 struct fc_rport_priv *rdata)
2070{
2071 struct fip_header *fiph;
2072 struct fip_desc *desc = NULL;
2073 struct fip_mac_desc *macd = NULL;
2074 struct fip_wwn_desc *wwn = NULL;
2075 struct fip_vn_desc *vn = NULL;
2076 struct fip_size_desc *size = NULL;
2077 struct fcoe_rport *frport;
2078 size_t rlen;
2079 size_t dlen;
2080 u32 desc_mask = 0;
2081 u32 dtype;
2082 u8 sub;
2083
2084 memset(rdata, 0, sizeof(*rdata) + sizeof(*frport));
2085 frport = fcoe_ctlr_rport(rdata);
2086
2087 fiph = (struct fip_header *)skb->data;
2088 frport->flags = ntohs(fiph->fip_flags);
2089
2090 sub = fiph->fip_subcode;
2091 switch (sub) {
2092 case FIP_SC_VN_PROBE_REQ:
2093 case FIP_SC_VN_PROBE_REP:
2094 case FIP_SC_VN_BEACON:
2095 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2096 BIT(FIP_DT_VN_ID);
2097 break;
2098 case FIP_SC_VN_CLAIM_NOTIFY:
2099 case FIP_SC_VN_CLAIM_REP:
2100 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2101 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2102 BIT(FIP_DT_FCOE_SIZE);
2103 break;
2104 default:
2105 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2106 return -EINVAL;
2107 }
2108
2109 rlen = ntohs(fiph->fip_dl_len) * 4;
2110 if (rlen + sizeof(*fiph) > skb->len)
2111 return -EINVAL;
2112
2113 desc = (struct fip_desc *)(fiph + 1);
2114 while (rlen > 0) {
2115 dlen = desc->fip_dlen * FIP_BPW;
2116 if (dlen < sizeof(*desc) || dlen > rlen)
2117 return -EINVAL;
2118
2119 dtype = desc->fip_dtype;
2120 if (dtype < 32) {
2121 if (!(desc_mask & BIT(dtype))) {
2122 LIBFCOE_FIP_DBG(fip,
2123 "unexpected or duplicated desc "
2124 "desc type %u in "
2125 "FIP VN2VN subtype %u\n",
2126 dtype, sub);
2127 return -EINVAL;
2128 }
2129 desc_mask &= ~BIT(dtype);
2130 }
2131
2132 switch (dtype) {
2133 case FIP_DT_MAC:
2134 if (dlen != sizeof(struct fip_mac_desc))
2135 goto len_err;
2136 macd = (struct fip_mac_desc *)desc;
2137 if (!is_valid_ether_addr(macd->fd_mac)) {
2138 LIBFCOE_FIP_DBG(fip,
2139 "Invalid MAC addr %pM in FIP VN2VN\n",
2140 macd->fd_mac);
2141 return -EINVAL;
2142 }
2143 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2144 break;
2145 case FIP_DT_NAME:
2146 if (dlen != sizeof(struct fip_wwn_desc))
2147 goto len_err;
2148 wwn = (struct fip_wwn_desc *)desc;
2149 rdata->ids.node_name = get_unaligned_be64(&wwn->fd_wwn);
2150 break;
2151 case FIP_DT_VN_ID:
2152 if (dlen != sizeof(struct fip_vn_desc))
2153 goto len_err;
2154 vn = (struct fip_vn_desc *)desc;
2155 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2156 rdata->ids.port_id = ntoh24(vn->fd_fc_id);
2157 rdata->ids.port_name = get_unaligned_be64(&vn->fd_wwpn);
2158 break;
2159 case FIP_DT_FC4F:
2160 if (dlen != sizeof(struct fip_fc4_feat))
2161 goto len_err;
2162 break;
2163 case FIP_DT_FCOE_SIZE:
2164 if (dlen != sizeof(struct fip_size_desc))
2165 goto len_err;
2166 size = (struct fip_size_desc *)desc;
2167 frport->fcoe_len = ntohs(size->fd_size);
2168 break;
2169 default:
2170 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2171 "in FIP probe\n", dtype);
2172 /* standard says ignore unknown descriptors >= 128 */
2173 if (dtype < FIP_DT_VENDOR_BASE)
2174 return -EINVAL;
2175 break;
2176 }
2177 desc = (struct fip_desc *)((char *)desc + dlen);
2178 rlen -= dlen;
2179 }
2180 return 0;
2181
2182len_err:
2183 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2184 dtype, dlen);
2185 return -EINVAL;
2186}
2187
2188/**
2189 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2190 * @fip: The FCoE controller
2191 *
2192 * Called with ctlr_mutex held.
2193 */
2194static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2195{
2196 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2197 fip->sol_time = jiffies;
2198}
2199
2200/**
2201 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2202 * @fip: The FCoE controller
2203 * @rdata: parsed remote port with frport from the probe request
2204 *
2205 * Called with ctlr_mutex held.
2206 */
2207static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2208 struct fc_rport_priv *rdata)
2209{
2210 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2211
2212 if (rdata->ids.port_id != fip->port_id)
2213 return;
2214
2215 switch (fip->state) {
2216 case FIP_ST_VNMP_CLAIM:
2217 case FIP_ST_VNMP_UP:
2218 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2219 frport->enode_mac, 0);
2220 break;
2221 case FIP_ST_VNMP_PROBE1:
2222 case FIP_ST_VNMP_PROBE2:
2223 /*
2224 * Decide whether to reply to the Probe.
2225 * Our selected address is never a "recorded" one, so
2226 * only reply if our WWPN is greater and the
2227 * Probe's REC bit is not set.
2228 * If we don't reply, we will change our address.
2229 */
2230 if (fip->lp->wwpn > rdata->ids.port_name &&
2231 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2232 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2233 frport->enode_mac, 0);
2234 break;
2235 }
2236 /* fall through */
2237 case FIP_ST_VNMP_START:
2238 fcoe_ctlr_vn_restart(fip);
2239 break;
2240 default:
2241 break;
2242 }
2243}
2244
2245/**
2246 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2247 * @fip: The FCoE controller
2248 * @rdata: parsed remote port with frport from the probe request
2249 *
2250 * Called with ctlr_mutex held.
2251 */
2252static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2253 struct fc_rport_priv *rdata)
2254{
2255 if (rdata->ids.port_id != fip->port_id)
2256 return;
2257 switch (fip->state) {
2258 case FIP_ST_VNMP_START:
2259 case FIP_ST_VNMP_PROBE1:
2260 case FIP_ST_VNMP_PROBE2:
2261 case FIP_ST_VNMP_CLAIM:
2262 fcoe_ctlr_vn_restart(fip);
2263 break;
2264 case FIP_ST_VNMP_UP:
2265 fcoe_ctlr_vn_send_claim(fip);
2266 break;
2267 default:
2268 break;
2269 }
2270}
2271
2272/**
2273 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2274 * @fip: The FCoE controller
2275 * @new: newly-parsed remote port with frport as a template for new rdata
2276 *
2277 * Called with ctlr_mutex held.
2278 */
2279static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fc_rport_priv *new)
2280{
2281 struct fc_lport *lport = fip->lp;
2282 struct fc_rport_priv *rdata;
2283 struct fc_rport_identifiers *ids;
2284 struct fcoe_rport *frport;
2285 u32 port_id;
2286
2287 port_id = new->ids.port_id;
2288 if (port_id == fip->port_id)
2289 return;
2290
2291 mutex_lock(&lport->disc.disc_mutex);
2292 rdata = lport->tt.rport_create(lport, port_id);
2293 if (!rdata) {
2294 mutex_unlock(&lport->disc.disc_mutex);
2295 return;
2296 }
2297
2298 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2299 rdata->disc_id = lport->disc.disc_id;
2300
2301 ids = &rdata->ids;
2302 if ((ids->port_name != -1 && ids->port_name != new->ids.port_name) ||
2303 (ids->node_name != -1 && ids->node_name != new->ids.node_name))
2304 lport->tt.rport_logoff(rdata);
2305 ids->port_name = new->ids.port_name;
2306 ids->node_name = new->ids.node_name;
2307 mutex_unlock(&lport->disc.disc_mutex);
2308
2309 frport = fcoe_ctlr_rport(rdata);
2310 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s\n",
2311 port_id, frport->fcoe_len ? "old" : "new");
2312 *frport = *fcoe_ctlr_rport(new);
2313 frport->time = 0;
2314}
2315
2316/**
2317 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2318 * @fip: The FCoE controller
2319 * @port_id: The port_id of the remote VN_node
2320 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2321 *
2322 * Returns non-zero error if no remote port found.
2323 */
2324static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2325{
2326 struct fc_lport *lport = fip->lp;
2327 struct fc_rport_priv *rdata;
2328 struct fcoe_rport *frport;
2329 int ret = -1;
2330
2331 rcu_read_lock();
2332 rdata = lport->tt.rport_lookup(lport, port_id);
2333 if (rdata) {
2334 frport = fcoe_ctlr_rport(rdata);
2335 memcpy(mac, frport->enode_mac, ETH_ALEN);
2336 ret = 0;
2337 }
2338 rcu_read_unlock();
2339 return ret;
2340}
2341
2342/**
2343 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2344 * @fip: The FCoE controller
2345 * @new: newly-parsed remote port with frport as a template for new rdata
2346 *
2347 * Called with ctlr_mutex held.
2348 */
2349static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2350 struct fc_rport_priv *new)
2351{
2352 struct fcoe_rport *frport = fcoe_ctlr_rport(new);
2353
2354 if (frport->flags & FIP_FL_REC_OR_P2P) {
2355 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2356 return;
2357 }
2358 switch (fip->state) {
2359 case FIP_ST_VNMP_START:
2360 case FIP_ST_VNMP_PROBE1:
2361 case FIP_ST_VNMP_PROBE2:
2362 if (new->ids.port_id == fip->port_id)
2363 fcoe_ctlr_vn_restart(fip);
2364 break;
2365 case FIP_ST_VNMP_CLAIM:
2366 case FIP_ST_VNMP_UP:
2367 if (new->ids.port_id == fip->port_id) {
2368 if (new->ids.port_name > fip->lp->wwpn) {
2369 fcoe_ctlr_vn_restart(fip);
2370 break;
2371 }
2372 fcoe_ctlr_vn_send_claim(fip);
2373 break;
2374 }
2375 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, frport->enode_mac,
2376 min((u32)frport->fcoe_len,
2377 fcoe_ctlr_fcoe_size(fip)));
2378 fcoe_ctlr_vn_add(fip, new);
2379 break;
2380 default:
2381 break;
2382 }
2383}
2384
2385/**
2386 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2387 * @fip: The FCoE controller that received the frame
2388 * @new: newly-parsed remote port with frport from the Claim Response
2389 *
2390 * Called with ctlr_mutex held.
2391 */
2392static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2393 struct fc_rport_priv *new)
2394{
2395 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2396 new->ids.port_id, fcoe_ctlr_state(fip->state));
2397 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2398 fcoe_ctlr_vn_add(fip, new);
2399}
2400
2401/**
2402 * fcoe_ctlr_vn_beacon() - handle received beacon.
2403 * @fip: The FCoE controller that received the frame
2404 * @new: newly-parsed remote port with frport from the Beacon
2405 *
2406 * Called with ctlr_mutex held.
2407 */
2408static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2409 struct fc_rport_priv *new)
2410{
2411 struct fc_lport *lport = fip->lp;
2412 struct fc_rport_priv *rdata;
2413 struct fcoe_rport *frport;
2414
2415 frport = fcoe_ctlr_rport(new);
2416 if (frport->flags & FIP_FL_REC_OR_P2P) {
2417 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2418 return;
2419 }
2420 mutex_lock(&lport->disc.disc_mutex);
2421 rdata = lport->tt.rport_lookup(lport, new->ids.port_id);
2422 if (rdata)
2423 kref_get(&rdata->kref);
2424 mutex_unlock(&lport->disc.disc_mutex);
2425 if (rdata) {
2426 if (rdata->ids.node_name == new->ids.node_name &&
2427 rdata->ids.port_name == new->ids.port_name) {
2428 frport = fcoe_ctlr_rport(rdata);
2429 if (!frport->time && fip->state == FIP_ST_VNMP_UP)
2430 lport->tt.rport_login(rdata);
2431 frport->time = jiffies;
2432 }
2433 kref_put(&rdata->kref, lport->tt.rport_destroy);
2434 return;
2435 }
2436 if (fip->state != FIP_ST_VNMP_UP)
2437 return;
2438
2439 /*
2440 * Beacon from a new neighbor.
2441 * Send a claim notify if one hasn't been sent recently.
2442 * Don't add the neighbor yet.
2443 */
2444 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2445 new->ids.port_id);
2446 if (time_after(jiffies,
2447 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2448 fcoe_ctlr_vn_send_claim(fip);
2449}
2450
2451/**
2452 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2453 * @fip: The FCoE controller
2454 *
2455 * Called with ctlr_mutex held.
2456 * Called only in state FIP_ST_VNMP_UP.
2457 * Returns the soonest time for next age-out or a time far in the future.
2458 */
2459static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2460{
2461 struct fc_lport *lport = fip->lp;
2462 struct fc_rport_priv *rdata;
2463 struct fcoe_rport *frport;
2464 unsigned long next_time;
2465 unsigned long deadline;
2466
2467 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2468 mutex_lock(&lport->disc.disc_mutex);
2469 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2470 frport = fcoe_ctlr_rport(rdata);
2471 if (!frport->time)
2472 continue;
2473 deadline = frport->time +
2474 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2475 if (time_after_eq(jiffies, deadline)) {
2476 frport->time = 0;
2477 LIBFCOE_FIP_DBG(fip,
2478 "port %16.16llx fc_id %6.6x beacon expired\n",
2479 rdata->ids.port_name, rdata->ids.port_id);
2480 lport->tt.rport_logoff(rdata);
2481 } else if (time_before(deadline, next_time))
2482 next_time = deadline;
2483 }
2484 mutex_unlock(&lport->disc.disc_mutex);
2485 return next_time;
2486}
2487
2488/**
2489 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2490 * @fip: The FCoE controller that received the frame
2491 * @skb: The received FIP frame
2492 *
2493 * Returns non-zero if the frame is dropped.
2494 * Always consumes the frame.
2495 */
2496static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2497{
2498 struct fip_header *fiph;
2499 enum fip_vn2vn_subcode sub;
2500 struct {
2501 struct fc_rport_priv rdata;
2502 struct fcoe_rport frport;
2503 } buf;
2504 int rc;
2505
2506 fiph = (struct fip_header *)skb->data;
2507 sub = fiph->fip_subcode;
2508
2509 rc = fcoe_ctlr_vn_parse(fip, skb, &buf.rdata);
2510 if (rc) {
2511 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2512 goto drop;
2513 }
2514
2515 mutex_lock(&fip->ctlr_mutex);
2516 switch (sub) {
2517 case FIP_SC_VN_PROBE_REQ:
2518 fcoe_ctlr_vn_probe_req(fip, &buf.rdata);
2519 break;
2520 case FIP_SC_VN_PROBE_REP:
2521 fcoe_ctlr_vn_probe_reply(fip, &buf.rdata);
2522 break;
2523 case FIP_SC_VN_CLAIM_NOTIFY:
2524 fcoe_ctlr_vn_claim_notify(fip, &buf.rdata);
2525 break;
2526 case FIP_SC_VN_CLAIM_REP:
2527 fcoe_ctlr_vn_claim_resp(fip, &buf.rdata);
2528 break;
2529 case FIP_SC_VN_BEACON:
2530 fcoe_ctlr_vn_beacon(fip, &buf.rdata);
2531 break;
2532 default:
2533 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2534 rc = -1;
2535 break;
2536 }
2537 mutex_unlock(&fip->ctlr_mutex);
2538drop:
2539 kfree_skb(skb);
2540 return rc;
2541}
2542
2543/**
2544 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2545 * @lport: The local port
2546 * @fp: The received frame
2547 *
2548 * This should never be called since we don't see RSCNs or other
2549 * fabric-generated ELSes.
2550 */
2551static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
2552{
2553 struct fc_seq_els_data rjt_data;
2554
2555 rjt_data.reason = ELS_RJT_UNSUP;
2556 rjt_data.explan = ELS_EXPL_NONE;
2557 lport->tt.seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
2558 fc_frame_free(fp);
2559}
2560
2561/**
2562 * fcoe_ctlr_disc_recv - start discovery for VN2VN mode.
2563 * @fip: The FCoE controller
2564 *
2565 * This sets a flag indicating that remote ports should be created
2566 * and started for the peers we discover. We use the disc_callback
2567 * pointer as that flag. Peers already discovered are created here.
2568 *
2569 * The lport lock is held during this call. The callback must be done
2570 * later, without holding either the lport or discovery locks.
2571 * The fcoe_ctlr lock may also be held during this call.
2572 */
2573static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
2574 enum fc_disc_event),
2575 struct fc_lport *lport)
2576{
2577 struct fc_disc *disc = &lport->disc;
2578 struct fcoe_ctlr *fip = disc->priv;
2579
2580 mutex_lock(&disc->disc_mutex);
2581 disc->disc_callback = callback;
2582 disc->disc_id = (disc->disc_id + 2) | 1;
2583 disc->pending = 1;
2584 schedule_work(&fip->timer_work);
2585 mutex_unlock(&disc->disc_mutex);
2586}
2587
2588/**
2589 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
2590 * @fip: The FCoE controller
2591 *
2592 * Starts the FLOGI and PLOGI login process to each discovered rport for which
2593 * we've received at least one beacon.
2594 * Performs the discovery complete callback.
2595 */
2596static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
2597{
2598 struct fc_lport *lport = fip->lp;
2599 struct fc_disc *disc = &lport->disc;
2600 struct fc_rport_priv *rdata;
2601 struct fcoe_rport *frport;
2602 void (*callback)(struct fc_lport *, enum fc_disc_event);
2603
2604 mutex_lock(&disc->disc_mutex);
2605 callback = disc->pending ? disc->disc_callback : NULL;
2606 disc->pending = 0;
2607 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
2608 frport = fcoe_ctlr_rport(rdata);
2609 if (frport->time)
2610 lport->tt.rport_login(rdata);
2611 }
2612 mutex_unlock(&disc->disc_mutex);
2613 if (callback)
2614 callback(lport, DISC_EV_SUCCESS);
2615}
2616
2617/**
2618 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
2619 * @fip: The FCoE controller
2620 */
2621static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
2622{
2623 unsigned long next_time;
2624 u8 mac[ETH_ALEN];
2625 u32 new_port_id = 0;
2626
2627 mutex_lock(&fip->ctlr_mutex);
2628 switch (fip->state) {
2629 case FIP_ST_VNMP_START:
2630 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
2631 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2632 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
2633 break;
2634 case FIP_ST_VNMP_PROBE1:
2635 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
2636 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2637 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2638 break;
2639 case FIP_ST_VNMP_PROBE2:
2640 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
2641 new_port_id = fip->port_id;
2642 hton24(mac, FIP_VN_FC_MAP);
2643 hton24(mac + 3, new_port_id);
2644 fcoe_ctlr_map_dest(fip);
2645 fip->update_mac(fip->lp, mac);
2646 fcoe_ctlr_vn_send_claim(fip);
2647 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2648 break;
2649 case FIP_ST_VNMP_CLAIM:
2650 /*
2651 * This may be invoked either by starting discovery so don't
2652 * go to the next state unless it's been long enough.
2653 */
2654 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2655 if (time_after_eq(jiffies, next_time)) {
2656 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
2657 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2658 fcoe_all_vn2vn, 0);
2659 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
2660 fip->port_ka_time = next_time;
2661 }
2662 fcoe_ctlr_vn_disc(fip);
2663 break;
2664 case FIP_ST_VNMP_UP:
2665 next_time = fcoe_ctlr_vn_age(fip);
2666 if (time_after_eq(jiffies, fip->port_ka_time)) {
2667 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
2668 fcoe_all_vn2vn, 0);
2669 fip->port_ka_time = jiffies +
2670 msecs_to_jiffies(FIP_VN_BEACON_INT +
2671 (random32() % FIP_VN_BEACON_FUZZ));
2672 }
2673 if (time_before(fip->port_ka_time, next_time))
2674 next_time = fip->port_ka_time;
2675 break;
2676 case FIP_ST_LINK_WAIT:
2677 goto unlock;
2678 default:
2679 WARN(1, "unexpected state %d\n", fip->state);
2680 goto unlock;
2681 }
2682 mod_timer(&fip->timer, next_time);
2683unlock:
2684 mutex_unlock(&fip->ctlr_mutex);
2685
2686 /* If port ID is new, notify local port after dropping ctlr_mutex */
2687 if (new_port_id)
2688 fc_lport_set_local_id(fip->lp, new_port_id);
2689}
2690
2691/**
2692 * fcoe_libfc_config() - Sets up libfc related properties for local port
2693 * @lp: The local port to configure libfc for
2694 * @fip: The FCoE controller in use by the local port
2695 * @tt: The libfc function template
2696 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
2697 *
2698 * Returns : 0 for success
2699 */
2700int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
2701 const struct libfc_function_template *tt, int init_fcp)
2702{
2703 /* Set the function pointers set by the LLDD */
2704 memcpy(&lport->tt, tt, sizeof(*tt));
2705 if (init_fcp && fc_fcp_init(lport))
2706 return -ENOMEM;
2707 fc_exch_init(lport);
2708 fc_elsct_init(lport);
2709 fc_lport_init(lport);
2710 if (fip->mode == FIP_MODE_VN2VN)
2711 lport->rport_priv_size = sizeof(struct fcoe_rport);
2712 fc_rport_init(lport);
2713 if (fip->mode == FIP_MODE_VN2VN) {
2714 lport->point_to_multipoint = 1;
2715 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
2716 lport->tt.disc_start = fcoe_ctlr_disc_start;
2717 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
2718 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
2719 mutex_init(&lport->disc.disc_mutex);
2720 INIT_LIST_HEAD(&lport->disc.rports);
2721 lport->disc.priv = fip;
2722 } else {
2723 fc_disc_init(lport);
2724 }
2725 return 0;
2726}
2727EXPORT_SYMBOL_GPL(fcoe_libfc_config);
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (c) 2008-2009 Cisco Systems, Inc. All rights reserved.
4 * Copyright (c) 2009 Intel Corporation. All rights reserved.
5 *
6 * Maintained at www.Open-FCoE.org
7 */
8
9#include <linux/types.h>
10#include <linux/module.h>
11#include <linux/kernel.h>
12#include <linux/list.h>
13#include <linux/spinlock.h>
14#include <linux/timer.h>
15#include <linux/netdevice.h>
16#include <linux/etherdevice.h>
17#include <linux/ethtool.h>
18#include <linux/if_ether.h>
19#include <linux/if_vlan.h>
20#include <linux/errno.h>
21#include <linux/bitops.h>
22#include <linux/slab.h>
23#include <net/rtnetlink.h>
24
25#include <scsi/fc/fc_els.h>
26#include <scsi/fc/fc_fs.h>
27#include <scsi/fc/fc_fip.h>
28#include <scsi/fc/fc_encaps.h>
29#include <scsi/fc/fc_fcoe.h>
30#include <scsi/fc/fc_fcp.h>
31
32#include <scsi/libfc.h>
33#include <scsi/libfcoe.h>
34
35#include "libfcoe.h"
36
37#define FCOE_CTLR_MIN_FKA 500 /* min keep alive (mS) */
38#define FCOE_CTLR_DEF_FKA FIP_DEF_FKA /* default keep alive (mS) */
39
40static void fcoe_ctlr_timeout(struct timer_list *);
41static void fcoe_ctlr_timer_work(struct work_struct *);
42static void fcoe_ctlr_recv_work(struct work_struct *);
43static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *);
44
45static void fcoe_ctlr_vn_start(struct fcoe_ctlr *);
46static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *, struct sk_buff *);
47static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *);
48static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *, u32, u8 *);
49
50static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *, struct sk_buff *);
51
52static u8 fcoe_all_fcfs[ETH_ALEN] = FIP_ALL_FCF_MACS;
53static u8 fcoe_all_enode[ETH_ALEN] = FIP_ALL_ENODE_MACS;
54static u8 fcoe_all_vn2vn[ETH_ALEN] = FIP_ALL_VN2VN_MACS;
55static u8 fcoe_all_p2p[ETH_ALEN] = FIP_ALL_P2P_MACS;
56
57static const char * const fcoe_ctlr_states[] = {
58 [FIP_ST_DISABLED] = "DISABLED",
59 [FIP_ST_LINK_WAIT] = "LINK_WAIT",
60 [FIP_ST_AUTO] = "AUTO",
61 [FIP_ST_NON_FIP] = "NON_FIP",
62 [FIP_ST_ENABLED] = "ENABLED",
63 [FIP_ST_VNMP_START] = "VNMP_START",
64 [FIP_ST_VNMP_PROBE1] = "VNMP_PROBE1",
65 [FIP_ST_VNMP_PROBE2] = "VNMP_PROBE2",
66 [FIP_ST_VNMP_CLAIM] = "VNMP_CLAIM",
67 [FIP_ST_VNMP_UP] = "VNMP_UP",
68};
69
70static const char *fcoe_ctlr_state(enum fip_state state)
71{
72 const char *cp = "unknown";
73
74 if (state < ARRAY_SIZE(fcoe_ctlr_states))
75 cp = fcoe_ctlr_states[state];
76 if (!cp)
77 cp = "unknown";
78 return cp;
79}
80
81/**
82 * fcoe_ctlr_set_state() - Set and do debug printing for the new FIP state.
83 * @fip: The FCoE controller
84 * @state: The new state
85 */
86static void fcoe_ctlr_set_state(struct fcoe_ctlr *fip, enum fip_state state)
87{
88 if (state == fip->state)
89 return;
90 if (fip->lp)
91 LIBFCOE_FIP_DBG(fip, "state %s -> %s\n",
92 fcoe_ctlr_state(fip->state), fcoe_ctlr_state(state));
93 fip->state = state;
94}
95
96/**
97 * fcoe_ctlr_mtu_valid() - Check if a FCF's MTU is valid
98 * @fcf: The FCF to check
99 *
100 * Return non-zero if FCF fcoe_size has been validated.
101 */
102static inline int fcoe_ctlr_mtu_valid(const struct fcoe_fcf *fcf)
103{
104 return (fcf->flags & FIP_FL_SOL) != 0;
105}
106
107/**
108 * fcoe_ctlr_fcf_usable() - Check if a FCF is usable
109 * @fcf: The FCF to check
110 *
111 * Return non-zero if the FCF is usable.
112 */
113static inline int fcoe_ctlr_fcf_usable(struct fcoe_fcf *fcf)
114{
115 u16 flags = FIP_FL_SOL | FIP_FL_AVAIL;
116
117 return (fcf->flags & flags) == flags;
118}
119
120/**
121 * fcoe_ctlr_map_dest() - Set flag and OUI for mapping destination addresses
122 * @fip: The FCoE controller
123 */
124static void fcoe_ctlr_map_dest(struct fcoe_ctlr *fip)
125{
126 if (fip->mode == FIP_MODE_VN2VN)
127 hton24(fip->dest_addr, FIP_VN_FC_MAP);
128 else
129 hton24(fip->dest_addr, FIP_DEF_FC_MAP);
130 hton24(fip->dest_addr + 3, 0);
131 fip->map_dest = 1;
132}
133
134/**
135 * fcoe_ctlr_init() - Initialize the FCoE Controller instance
136 * @fip: The FCoE controller to initialize
137 * @mode: FIP mode to set
138 */
139void fcoe_ctlr_init(struct fcoe_ctlr *fip, enum fip_mode mode)
140{
141 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
142 fip->mode = mode;
143 fip->fip_resp = false;
144 INIT_LIST_HEAD(&fip->fcfs);
145 mutex_init(&fip->ctlr_mutex);
146 spin_lock_init(&fip->ctlr_lock);
147 fip->flogi_oxid = FC_XID_UNKNOWN;
148 timer_setup(&fip->timer, fcoe_ctlr_timeout, 0);
149 INIT_WORK(&fip->timer_work, fcoe_ctlr_timer_work);
150 INIT_WORK(&fip->recv_work, fcoe_ctlr_recv_work);
151 skb_queue_head_init(&fip->fip_recv_list);
152}
153EXPORT_SYMBOL(fcoe_ctlr_init);
154
155/**
156 * fcoe_sysfs_fcf_add() - Add a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
157 * @new: The newly discovered FCF
158 *
159 * Called with fip->ctlr_mutex held
160 */
161static int fcoe_sysfs_fcf_add(struct fcoe_fcf *new)
162{
163 struct fcoe_ctlr *fip = new->fip;
164 struct fcoe_ctlr_device *ctlr_dev;
165 struct fcoe_fcf_device *temp, *fcf_dev;
166 int rc = -ENOMEM;
167
168 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
169 new->fabric_name, new->fcf_mac);
170
171 temp = kzalloc(sizeof(*temp), GFP_KERNEL);
172 if (!temp)
173 goto out;
174
175 temp->fabric_name = new->fabric_name;
176 temp->switch_name = new->switch_name;
177 temp->fc_map = new->fc_map;
178 temp->vfid = new->vfid;
179 memcpy(temp->mac, new->fcf_mac, ETH_ALEN);
180 temp->priority = new->pri;
181 temp->fka_period = new->fka_period;
182 temp->selected = 0; /* default to unselected */
183
184 /*
185 * If ctlr_dev doesn't exist then it means we're a libfcoe user
186 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device.
187 * fnic would be an example of a driver with this behavior. In this
188 * case we want to add the fcoe_fcf to the fcoe_ctlr list, but we
189 * don't want to make sysfs changes.
190 */
191
192 ctlr_dev = fcoe_ctlr_to_ctlr_dev(fip);
193 if (ctlr_dev) {
194 mutex_lock(&ctlr_dev->lock);
195 fcf_dev = fcoe_fcf_device_add(ctlr_dev, temp);
196 if (unlikely(!fcf_dev)) {
197 rc = -ENOMEM;
198 mutex_unlock(&ctlr_dev->lock);
199 goto out;
200 }
201
202 /*
203 * The fcoe_sysfs layer can return a CONNECTED fcf that
204 * has a priv (fcf was never deleted) or a CONNECTED fcf
205 * that doesn't have a priv (fcf was deleted). However,
206 * libfcoe will always delete FCFs before trying to add
207 * them. This is ensured because both recv_adv and
208 * age_fcfs are protected by the the fcoe_ctlr's mutex.
209 * This means that we should never get a FCF with a
210 * non-NULL priv pointer.
211 */
212 BUG_ON(fcf_dev->priv);
213
214 fcf_dev->priv = new;
215 new->fcf_dev = fcf_dev;
216 mutex_unlock(&ctlr_dev->lock);
217 }
218
219 list_add(&new->list, &fip->fcfs);
220 fip->fcf_count++;
221 rc = 0;
222
223out:
224 kfree(temp);
225 return rc;
226}
227
228/**
229 * fcoe_sysfs_fcf_del() - Remove a fcoe_fcf{,_device} to a fcoe_ctlr{,_device}
230 * @new: The FCF to be removed
231 *
232 * Called with fip->ctlr_mutex held
233 */
234static void fcoe_sysfs_fcf_del(struct fcoe_fcf *new)
235{
236 struct fcoe_ctlr *fip = new->fip;
237 struct fcoe_ctlr_device *cdev;
238 struct fcoe_fcf_device *fcf_dev;
239
240 list_del(&new->list);
241 fip->fcf_count--;
242
243 /*
244 * If ctlr_dev doesn't exist then it means we're a libfcoe user
245 * who doesn't use fcoe_syfs and didn't allocate a fcoe_ctlr_device
246 * or a fcoe_fcf_device.
247 *
248 * fnic would be an example of a driver with this behavior. In this
249 * case we want to remove the fcoe_fcf from the fcoe_ctlr list (above),
250 * but we don't want to make sysfs changes.
251 */
252 cdev = fcoe_ctlr_to_ctlr_dev(fip);
253 if (cdev) {
254 mutex_lock(&cdev->lock);
255 fcf_dev = fcoe_fcf_to_fcf_dev(new);
256 WARN_ON(!fcf_dev);
257 new->fcf_dev = NULL;
258 fcoe_fcf_device_delete(fcf_dev);
259 mutex_unlock(&cdev->lock);
260 }
261 kfree(new);
262}
263
264/**
265 * fcoe_ctlr_reset_fcfs() - Reset and free all FCFs for a controller
266 * @fip: The FCoE controller whose FCFs are to be reset
267 *
268 * Called with &fcoe_ctlr lock held.
269 */
270static void fcoe_ctlr_reset_fcfs(struct fcoe_ctlr *fip)
271{
272 struct fcoe_fcf *fcf;
273 struct fcoe_fcf *next;
274
275 fip->sel_fcf = NULL;
276 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
277 fcoe_sysfs_fcf_del(fcf);
278 }
279 WARN_ON(fip->fcf_count);
280
281 fip->sel_time = 0;
282}
283
284/**
285 * fcoe_ctlr_destroy() - Disable and tear down a FCoE controller
286 * @fip: The FCoE controller to tear down
287 *
288 * This is called by FCoE drivers before freeing the &fcoe_ctlr.
289 *
290 * The receive handler will have been deleted before this to guarantee
291 * that no more recv_work will be scheduled.
292 *
293 * The timer routine will simply return once we set FIP_ST_DISABLED.
294 * This guarantees that no further timeouts or work will be scheduled.
295 */
296void fcoe_ctlr_destroy(struct fcoe_ctlr *fip)
297{
298 cancel_work_sync(&fip->recv_work);
299 skb_queue_purge(&fip->fip_recv_list);
300
301 mutex_lock(&fip->ctlr_mutex);
302 fcoe_ctlr_set_state(fip, FIP_ST_DISABLED);
303 fcoe_ctlr_reset_fcfs(fip);
304 mutex_unlock(&fip->ctlr_mutex);
305 del_timer_sync(&fip->timer);
306 cancel_work_sync(&fip->timer_work);
307}
308EXPORT_SYMBOL(fcoe_ctlr_destroy);
309
310/**
311 * fcoe_ctlr_announce() - announce new FCF selection
312 * @fip: The FCoE controller
313 *
314 * Also sets the destination MAC for FCoE and control packets
315 *
316 * Called with neither ctlr_mutex nor ctlr_lock held.
317 */
318static void fcoe_ctlr_announce(struct fcoe_ctlr *fip)
319{
320 struct fcoe_fcf *sel;
321 struct fcoe_fcf *fcf;
322
323 mutex_lock(&fip->ctlr_mutex);
324 spin_lock_bh(&fip->ctlr_lock);
325
326 kfree_skb(fip->flogi_req);
327 fip->flogi_req = NULL;
328 list_for_each_entry(fcf, &fip->fcfs, list)
329 fcf->flogi_sent = 0;
330
331 spin_unlock_bh(&fip->ctlr_lock);
332 sel = fip->sel_fcf;
333
334 if (sel && ether_addr_equal(sel->fcf_mac, fip->dest_addr))
335 goto unlock;
336 if (!is_zero_ether_addr(fip->dest_addr)) {
337 printk(KERN_NOTICE "libfcoe: host%d: "
338 "FIP Fibre-Channel Forwarder MAC %pM deselected\n",
339 fip->lp->host->host_no, fip->dest_addr);
340 eth_zero_addr(fip->dest_addr);
341 }
342 if (sel) {
343 printk(KERN_INFO "libfcoe: host%d: FIP selected "
344 "Fibre-Channel Forwarder MAC %pM\n",
345 fip->lp->host->host_no, sel->fcf_mac);
346 memcpy(fip->dest_addr, sel->fcoe_mac, ETH_ALEN);
347 fip->map_dest = 0;
348 }
349unlock:
350 mutex_unlock(&fip->ctlr_mutex);
351}
352
353/**
354 * fcoe_ctlr_fcoe_size() - Return the maximum FCoE size required for VN_Port
355 * @fip: The FCoE controller to get the maximum FCoE size from
356 *
357 * Returns the maximum packet size including the FCoE header and trailer,
358 * but not including any Ethernet or VLAN headers.
359 */
360static inline u32 fcoe_ctlr_fcoe_size(struct fcoe_ctlr *fip)
361{
362 /*
363 * Determine the max FCoE frame size allowed, including
364 * FCoE header and trailer.
365 * Note: lp->mfs is currently the payload size, not the frame size.
366 */
367 return fip->lp->mfs + sizeof(struct fc_frame_header) +
368 sizeof(struct fcoe_hdr) + sizeof(struct fcoe_crc_eof);
369}
370
371/**
372 * fcoe_ctlr_solicit() - Send a FIP solicitation
373 * @fip: The FCoE controller to send the solicitation on
374 * @fcf: The destination FCF (if NULL, a multicast solicitation is sent)
375 */
376static void fcoe_ctlr_solicit(struct fcoe_ctlr *fip, struct fcoe_fcf *fcf)
377{
378 struct sk_buff *skb;
379 struct fip_sol {
380 struct ethhdr eth;
381 struct fip_header fip;
382 struct {
383 struct fip_mac_desc mac;
384 struct fip_wwn_desc wwnn;
385 struct fip_size_desc size;
386 } __packed desc;
387 } __packed * sol;
388 u32 fcoe_size;
389
390 skb = dev_alloc_skb(sizeof(*sol));
391 if (!skb)
392 return;
393
394 sol = (struct fip_sol *)skb->data;
395
396 memset(sol, 0, sizeof(*sol));
397 memcpy(sol->eth.h_dest, fcf ? fcf->fcf_mac : fcoe_all_fcfs, ETH_ALEN);
398 memcpy(sol->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
399 sol->eth.h_proto = htons(ETH_P_FIP);
400
401 sol->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
402 sol->fip.fip_op = htons(FIP_OP_DISC);
403 sol->fip.fip_subcode = FIP_SC_SOL;
404 sol->fip.fip_dl_len = htons(sizeof(sol->desc) / FIP_BPW);
405 sol->fip.fip_flags = htons(FIP_FL_FPMA);
406 if (fip->spma)
407 sol->fip.fip_flags |= htons(FIP_FL_SPMA);
408
409 sol->desc.mac.fd_desc.fip_dtype = FIP_DT_MAC;
410 sol->desc.mac.fd_desc.fip_dlen = sizeof(sol->desc.mac) / FIP_BPW;
411 memcpy(sol->desc.mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
412
413 sol->desc.wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
414 sol->desc.wwnn.fd_desc.fip_dlen = sizeof(sol->desc.wwnn) / FIP_BPW;
415 put_unaligned_be64(fip->lp->wwnn, &sol->desc.wwnn.fd_wwn);
416
417 fcoe_size = fcoe_ctlr_fcoe_size(fip);
418 sol->desc.size.fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
419 sol->desc.size.fd_desc.fip_dlen = sizeof(sol->desc.size) / FIP_BPW;
420 sol->desc.size.fd_size = htons(fcoe_size);
421
422 skb_put(skb, sizeof(*sol));
423 skb->protocol = htons(ETH_P_FIP);
424 skb->priority = fip->priority;
425 skb_reset_mac_header(skb);
426 skb_reset_network_header(skb);
427 fip->send(fip, skb);
428
429 if (!fcf)
430 fip->sol_time = jiffies;
431}
432
433/**
434 * fcoe_ctlr_link_up() - Start FCoE controller
435 * @fip: The FCoE controller to start
436 *
437 * Called from the LLD when the network link is ready.
438 */
439void fcoe_ctlr_link_up(struct fcoe_ctlr *fip)
440{
441 mutex_lock(&fip->ctlr_mutex);
442 if (fip->state == FIP_ST_NON_FIP || fip->state == FIP_ST_AUTO) {
443 mutex_unlock(&fip->ctlr_mutex);
444 fc_linkup(fip->lp);
445 } else if (fip->state == FIP_ST_LINK_WAIT) {
446 if (fip->mode == FIP_MODE_NON_FIP)
447 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
448 else
449 fcoe_ctlr_set_state(fip, FIP_ST_AUTO);
450 switch (fip->mode) {
451 default:
452 LIBFCOE_FIP_DBG(fip, "invalid mode %d\n", fip->mode);
453 fallthrough;
454 case FIP_MODE_AUTO:
455 LIBFCOE_FIP_DBG(fip, "%s", "setting AUTO mode.\n");
456 fallthrough;
457 case FIP_MODE_FABRIC:
458 case FIP_MODE_NON_FIP:
459 mutex_unlock(&fip->ctlr_mutex);
460 fc_linkup(fip->lp);
461 fcoe_ctlr_solicit(fip, NULL);
462 break;
463 case FIP_MODE_VN2VN:
464 fcoe_ctlr_vn_start(fip);
465 mutex_unlock(&fip->ctlr_mutex);
466 fc_linkup(fip->lp);
467 break;
468 }
469 } else
470 mutex_unlock(&fip->ctlr_mutex);
471}
472EXPORT_SYMBOL(fcoe_ctlr_link_up);
473
474/**
475 * fcoe_ctlr_reset() - Reset a FCoE controller
476 * @fip: The FCoE controller to reset
477 */
478static void fcoe_ctlr_reset(struct fcoe_ctlr *fip)
479{
480 fcoe_ctlr_reset_fcfs(fip);
481 del_timer(&fip->timer);
482 fip->ctlr_ka_time = 0;
483 fip->port_ka_time = 0;
484 fip->sol_time = 0;
485 fip->flogi_oxid = FC_XID_UNKNOWN;
486 fcoe_ctlr_map_dest(fip);
487}
488
489/**
490 * fcoe_ctlr_link_down() - Stop a FCoE controller
491 * @fip: The FCoE controller to be stopped
492 *
493 * Returns non-zero if the link was up and now isn't.
494 *
495 * Called from the LLD when the network link is not ready.
496 * There may be multiple calls while the link is down.
497 */
498int fcoe_ctlr_link_down(struct fcoe_ctlr *fip)
499{
500 int link_dropped;
501
502 LIBFCOE_FIP_DBG(fip, "link down.\n");
503 mutex_lock(&fip->ctlr_mutex);
504 fcoe_ctlr_reset(fip);
505 link_dropped = fip->state != FIP_ST_LINK_WAIT;
506 fcoe_ctlr_set_state(fip, FIP_ST_LINK_WAIT);
507 mutex_unlock(&fip->ctlr_mutex);
508
509 if (link_dropped)
510 fc_linkdown(fip->lp);
511 return link_dropped;
512}
513EXPORT_SYMBOL(fcoe_ctlr_link_down);
514
515/**
516 * fcoe_ctlr_send_keep_alive() - Send a keep-alive to the selected FCF
517 * @fip: The FCoE controller to send the FKA on
518 * @lport: libfc fc_lport to send from
519 * @ports: 0 for controller keep-alive, 1 for port keep-alive
520 * @sa: The source MAC address
521 *
522 * A controller keep-alive is sent every fka_period (typically 8 seconds).
523 * The source MAC is the native MAC address.
524 *
525 * A port keep-alive is sent every 90 seconds while logged in.
526 * The source MAC is the assigned mapped source address.
527 * The destination is the FCF's F-port.
528 */
529static void fcoe_ctlr_send_keep_alive(struct fcoe_ctlr *fip,
530 struct fc_lport *lport,
531 int ports, u8 *sa)
532{
533 struct sk_buff *skb;
534 struct fip_kal {
535 struct ethhdr eth;
536 struct fip_header fip;
537 struct fip_mac_desc mac;
538 } __packed * kal;
539 struct fip_vn_desc *vn;
540 u32 len;
541 struct fc_lport *lp;
542 struct fcoe_fcf *fcf;
543
544 fcf = fip->sel_fcf;
545 lp = fip->lp;
546 if (!fcf || (ports && !lp->port_id))
547 return;
548
549 len = sizeof(*kal) + ports * sizeof(*vn);
550 skb = dev_alloc_skb(len);
551 if (!skb)
552 return;
553
554 kal = (struct fip_kal *)skb->data;
555 memset(kal, 0, len);
556 memcpy(kal->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
557 memcpy(kal->eth.h_source, sa, ETH_ALEN);
558 kal->eth.h_proto = htons(ETH_P_FIP);
559
560 kal->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
561 kal->fip.fip_op = htons(FIP_OP_CTRL);
562 kal->fip.fip_subcode = FIP_SC_KEEP_ALIVE;
563 kal->fip.fip_dl_len = htons((sizeof(kal->mac) +
564 ports * sizeof(*vn)) / FIP_BPW);
565 kal->fip.fip_flags = htons(FIP_FL_FPMA);
566 if (fip->spma)
567 kal->fip.fip_flags |= htons(FIP_FL_SPMA);
568
569 kal->mac.fd_desc.fip_dtype = FIP_DT_MAC;
570 kal->mac.fd_desc.fip_dlen = sizeof(kal->mac) / FIP_BPW;
571 memcpy(kal->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
572 if (ports) {
573 vn = (struct fip_vn_desc *)(kal + 1);
574 vn->fd_desc.fip_dtype = FIP_DT_VN_ID;
575 vn->fd_desc.fip_dlen = sizeof(*vn) / FIP_BPW;
576 memcpy(vn->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
577 hton24(vn->fd_fc_id, lport->port_id);
578 put_unaligned_be64(lport->wwpn, &vn->fd_wwpn);
579 }
580 skb_put(skb, len);
581 skb->protocol = htons(ETH_P_FIP);
582 skb->priority = fip->priority;
583 skb_reset_mac_header(skb);
584 skb_reset_network_header(skb);
585 fip->send(fip, skb);
586}
587
588/**
589 * fcoe_ctlr_encaps() - Encapsulate an ELS frame for FIP, without sending it
590 * @fip: The FCoE controller for the ELS frame
591 * @lport: The local port
592 * @dtype: The FIP descriptor type for the frame
593 * @skb: The FCoE ELS frame including FC header but no FCoE headers
594 * @d_id: The destination port ID.
595 *
596 * Returns non-zero error code on failure.
597 *
598 * The caller must check that the length is a multiple of 4.
599 *
600 * The @skb must have enough headroom (28 bytes) and tailroom (8 bytes).
601 * Headroom includes the FIP encapsulation description, FIP header, and
602 * Ethernet header. The tailroom is for the FIP MAC descriptor.
603 */
604static int fcoe_ctlr_encaps(struct fcoe_ctlr *fip, struct fc_lport *lport,
605 u8 dtype, struct sk_buff *skb, u32 d_id)
606{
607 struct fip_encaps_head {
608 struct ethhdr eth;
609 struct fip_header fip;
610 struct fip_encaps encaps;
611 } __packed * cap;
612 struct fc_frame_header *fh;
613 struct fip_mac_desc *mac;
614 struct fcoe_fcf *fcf;
615 size_t dlen;
616 u16 fip_flags;
617 u8 op;
618
619 fh = (struct fc_frame_header *)skb->data;
620 op = *(u8 *)(fh + 1);
621 dlen = sizeof(struct fip_encaps) + skb->len; /* len before push */
622 cap = skb_push(skb, sizeof(*cap));
623 memset(cap, 0, sizeof(*cap));
624
625 if (lport->point_to_multipoint) {
626 if (fcoe_ctlr_vn_lookup(fip, d_id, cap->eth.h_dest))
627 return -ENODEV;
628 fip_flags = 0;
629 } else {
630 fcf = fip->sel_fcf;
631 if (!fcf)
632 return -ENODEV;
633 fip_flags = fcf->flags;
634 fip_flags &= fip->spma ? FIP_FL_SPMA | FIP_FL_FPMA :
635 FIP_FL_FPMA;
636 if (!fip_flags)
637 return -ENODEV;
638 memcpy(cap->eth.h_dest, fcf->fcf_mac, ETH_ALEN);
639 }
640 memcpy(cap->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
641 cap->eth.h_proto = htons(ETH_P_FIP);
642
643 cap->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
644 cap->fip.fip_op = htons(FIP_OP_LS);
645 if (op == ELS_LS_ACC || op == ELS_LS_RJT)
646 cap->fip.fip_subcode = FIP_SC_REP;
647 else
648 cap->fip.fip_subcode = FIP_SC_REQ;
649 cap->fip.fip_flags = htons(fip_flags);
650
651 cap->encaps.fd_desc.fip_dtype = dtype;
652 cap->encaps.fd_desc.fip_dlen = dlen / FIP_BPW;
653
654 if (op != ELS_LS_RJT) {
655 dlen += sizeof(*mac);
656 mac = skb_put_zero(skb, sizeof(*mac));
657 mac->fd_desc.fip_dtype = FIP_DT_MAC;
658 mac->fd_desc.fip_dlen = sizeof(*mac) / FIP_BPW;
659 if (dtype != FIP_DT_FLOGI && dtype != FIP_DT_FDISC) {
660 memcpy(mac->fd_mac, fip->get_src_addr(lport), ETH_ALEN);
661 } else if (fip->mode == FIP_MODE_VN2VN) {
662 hton24(mac->fd_mac, FIP_VN_FC_MAP);
663 hton24(mac->fd_mac + 3, fip->port_id);
664 } else if (fip_flags & FIP_FL_SPMA) {
665 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with SPMA\n");
666 memcpy(mac->fd_mac, fip->ctl_src_addr, ETH_ALEN);
667 } else {
668 LIBFCOE_FIP_DBG(fip, "FLOGI/FDISC sent with FPMA\n");
669 /* FPMA only FLOGI. Must leave the MAC desc zeroed. */
670 }
671 }
672 cap->fip.fip_dl_len = htons(dlen / FIP_BPW);
673
674 skb->protocol = htons(ETH_P_FIP);
675 skb->priority = fip->priority;
676 skb_reset_mac_header(skb);
677 skb_reset_network_header(skb);
678 return 0;
679}
680
681/**
682 * fcoe_ctlr_els_send() - Send an ELS frame encapsulated by FIP if appropriate.
683 * @fip: FCoE controller.
684 * @lport: libfc fc_lport to send from
685 * @skb: FCoE ELS frame including FC header but no FCoE headers.
686 *
687 * Returns a non-zero error code if the frame should not be sent.
688 * Returns zero if the caller should send the frame with FCoE encapsulation.
689 *
690 * The caller must check that the length is a multiple of 4.
691 * The SKB must have enough headroom (28 bytes) and tailroom (8 bytes).
692 * The the skb must also be an fc_frame.
693 *
694 * This is called from the lower-level driver with spinlocks held,
695 * so we must not take a mutex here.
696 */
697int fcoe_ctlr_els_send(struct fcoe_ctlr *fip, struct fc_lport *lport,
698 struct sk_buff *skb)
699{
700 struct fc_frame *fp;
701 struct fc_frame_header *fh;
702 u16 old_xid;
703 u8 op;
704 u8 mac[ETH_ALEN];
705
706 fp = container_of(skb, struct fc_frame, skb);
707 fh = (struct fc_frame_header *)skb->data;
708 op = *(u8 *)(fh + 1);
709
710 if (op == ELS_FLOGI && fip->mode != FIP_MODE_VN2VN) {
711 old_xid = fip->flogi_oxid;
712 fip->flogi_oxid = ntohs(fh->fh_ox_id);
713 if (fip->state == FIP_ST_AUTO) {
714 if (old_xid == FC_XID_UNKNOWN)
715 fip->flogi_count = 0;
716 fip->flogi_count++;
717 if (fip->flogi_count < 3)
718 goto drop;
719 fcoe_ctlr_map_dest(fip);
720 return 0;
721 }
722 if (fip->state == FIP_ST_NON_FIP)
723 fcoe_ctlr_map_dest(fip);
724 }
725
726 if (fip->state == FIP_ST_NON_FIP)
727 return 0;
728 if (!fip->sel_fcf && fip->mode != FIP_MODE_VN2VN)
729 goto drop;
730 switch (op) {
731 case ELS_FLOGI:
732 op = FIP_DT_FLOGI;
733 if (fip->mode == FIP_MODE_VN2VN)
734 break;
735 spin_lock_bh(&fip->ctlr_lock);
736 kfree_skb(fip->flogi_req);
737 fip->flogi_req = skb;
738 fip->flogi_req_send = 1;
739 spin_unlock_bh(&fip->ctlr_lock);
740 schedule_work(&fip->timer_work);
741 return -EINPROGRESS;
742 case ELS_FDISC:
743 if (ntoh24(fh->fh_s_id))
744 return 0;
745 op = FIP_DT_FDISC;
746 break;
747 case ELS_LOGO:
748 if (fip->mode == FIP_MODE_VN2VN) {
749 if (fip->state != FIP_ST_VNMP_UP)
750 goto drop;
751 if (ntoh24(fh->fh_d_id) == FC_FID_FLOGI)
752 goto drop;
753 } else {
754 if (fip->state != FIP_ST_ENABLED)
755 return 0;
756 if (ntoh24(fh->fh_d_id) != FC_FID_FLOGI)
757 return 0;
758 }
759 op = FIP_DT_LOGO;
760 break;
761 case ELS_LS_ACC:
762 /*
763 * If non-FIP, we may have gotten an SID by accepting an FLOGI
764 * from a point-to-point connection. Switch to using
765 * the source mac based on the SID. The destination
766 * MAC in this case would have been set by receiving the
767 * FLOGI.
768 */
769 if (fip->state == FIP_ST_NON_FIP) {
770 if (fip->flogi_oxid == FC_XID_UNKNOWN)
771 return 0;
772 fip->flogi_oxid = FC_XID_UNKNOWN;
773 fc_fcoe_set_mac(mac, fh->fh_d_id);
774 fip->update_mac(lport, mac);
775 }
776 fallthrough;
777 case ELS_LS_RJT:
778 op = fr_encaps(fp);
779 if (op)
780 break;
781 return 0;
782 default:
783 if (fip->state != FIP_ST_ENABLED &&
784 fip->state != FIP_ST_VNMP_UP)
785 goto drop;
786 return 0;
787 }
788 LIBFCOE_FIP_DBG(fip, "els_send op %u d_id %x\n",
789 op, ntoh24(fh->fh_d_id));
790 if (fcoe_ctlr_encaps(fip, lport, op, skb, ntoh24(fh->fh_d_id)))
791 goto drop;
792 fip->send(fip, skb);
793 return -EINPROGRESS;
794drop:
795 LIBFCOE_FIP_DBG(fip, "drop els_send op %u d_id %x\n",
796 op, ntoh24(fh->fh_d_id));
797 kfree_skb(skb);
798 return -EINVAL;
799}
800EXPORT_SYMBOL(fcoe_ctlr_els_send);
801
802/**
803 * fcoe_ctlr_age_fcfs() - Reset and free all old FCFs for a controller
804 * @fip: The FCoE controller to free FCFs on
805 *
806 * Called with lock held and preemption disabled.
807 *
808 * An FCF is considered old if we have missed two advertisements.
809 * That is, there have been no valid advertisement from it for 2.5
810 * times its keep-alive period.
811 *
812 * In addition, determine the time when an FCF selection can occur.
813 *
814 * Also, increment the MissDiscAdvCount when no advertisement is received
815 * for the corresponding FCF for 1.5 * FKA_ADV_PERIOD (FC-BB-5 LESB).
816 *
817 * Returns the time in jiffies for the next call.
818 */
819static unsigned long fcoe_ctlr_age_fcfs(struct fcoe_ctlr *fip)
820{
821 struct fcoe_fcf *fcf;
822 struct fcoe_fcf *next;
823 unsigned long next_timer = jiffies + msecs_to_jiffies(FIP_VN_KA_PERIOD);
824 unsigned long deadline;
825 unsigned long sel_time = 0;
826 struct list_head del_list;
827
828 INIT_LIST_HEAD(&del_list);
829
830 list_for_each_entry_safe(fcf, next, &fip->fcfs, list) {
831 deadline = fcf->time + fcf->fka_period + fcf->fka_period / 2;
832 if (fip->sel_fcf == fcf) {
833 if (time_after(jiffies, deadline)) {
834 u64 miss_cnt;
835
836 miss_cnt = this_cpu_inc_return(fip->lp->stats->MissDiscAdvCount);
837 printk(KERN_INFO "libfcoe: host%d: "
838 "Missing Discovery Advertisement "
839 "for fab %16.16llx count %lld\n",
840 fip->lp->host->host_no, fcf->fabric_name,
841 miss_cnt);
842 } else if (time_after(next_timer, deadline))
843 next_timer = deadline;
844 }
845
846 deadline += fcf->fka_period;
847 if (time_after_eq(jiffies, deadline)) {
848 if (fip->sel_fcf == fcf)
849 fip->sel_fcf = NULL;
850 /*
851 * Move to delete list so we can call
852 * fcoe_sysfs_fcf_del (which can sleep)
853 * after the put_cpu().
854 */
855 list_del(&fcf->list);
856 list_add(&fcf->list, &del_list);
857 this_cpu_inc(fip->lp->stats->VLinkFailureCount);
858 } else {
859 if (time_after(next_timer, deadline))
860 next_timer = deadline;
861 if (fcoe_ctlr_mtu_valid(fcf) &&
862 (!sel_time || time_before(sel_time, fcf->time)))
863 sel_time = fcf->time;
864 }
865 }
866
867 list_for_each_entry_safe(fcf, next, &del_list, list) {
868 /* Removes fcf from current list */
869 fcoe_sysfs_fcf_del(fcf);
870 }
871
872 if (sel_time && !fip->sel_fcf && !fip->sel_time) {
873 sel_time += msecs_to_jiffies(FCOE_CTLR_START_DELAY);
874 fip->sel_time = sel_time;
875 }
876
877 return next_timer;
878}
879
880/**
881 * fcoe_ctlr_parse_adv() - Decode a FIP advertisement into a new FCF entry
882 * @fip: The FCoE controller receiving the advertisement
883 * @skb: The received FIP advertisement frame
884 * @fcf: The resulting FCF entry
885 *
886 * Returns zero on a valid parsed advertisement,
887 * otherwise returns non zero value.
888 */
889static int fcoe_ctlr_parse_adv(struct fcoe_ctlr *fip,
890 struct sk_buff *skb, struct fcoe_fcf *fcf)
891{
892 struct fip_header *fiph;
893 struct fip_desc *desc = NULL;
894 struct fip_wwn_desc *wwn;
895 struct fip_fab_desc *fab;
896 struct fip_fka_desc *fka;
897 unsigned long t;
898 size_t rlen;
899 size_t dlen;
900 u32 desc_mask;
901
902 memset(fcf, 0, sizeof(*fcf));
903 fcf->fka_period = msecs_to_jiffies(FCOE_CTLR_DEF_FKA);
904
905 fiph = (struct fip_header *)skb->data;
906 fcf->flags = ntohs(fiph->fip_flags);
907
908 /*
909 * mask of required descriptors. validating each one clears its bit.
910 */
911 desc_mask = BIT(FIP_DT_PRI) | BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
912 BIT(FIP_DT_FAB) | BIT(FIP_DT_FKA);
913
914 rlen = ntohs(fiph->fip_dl_len) * 4;
915 if (rlen + sizeof(*fiph) > skb->len)
916 return -EINVAL;
917
918 desc = (struct fip_desc *)(fiph + 1);
919 while (rlen > 0) {
920 dlen = desc->fip_dlen * FIP_BPW;
921 if (dlen < sizeof(*desc) || dlen > rlen)
922 return -EINVAL;
923 /* Drop Adv if there are duplicate critical descriptors */
924 if ((desc->fip_dtype < 32) &&
925 !(desc_mask & 1U << desc->fip_dtype)) {
926 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
927 "Descriptors in FIP adv\n");
928 return -EINVAL;
929 }
930 switch (desc->fip_dtype) {
931 case FIP_DT_PRI:
932 if (dlen != sizeof(struct fip_pri_desc))
933 goto len_err;
934 fcf->pri = ((struct fip_pri_desc *)desc)->fd_pri;
935 desc_mask &= ~BIT(FIP_DT_PRI);
936 break;
937 case FIP_DT_MAC:
938 if (dlen != sizeof(struct fip_mac_desc))
939 goto len_err;
940 memcpy(fcf->fcf_mac,
941 ((struct fip_mac_desc *)desc)->fd_mac,
942 ETH_ALEN);
943 memcpy(fcf->fcoe_mac, fcf->fcf_mac, ETH_ALEN);
944 if (!is_valid_ether_addr(fcf->fcf_mac)) {
945 LIBFCOE_FIP_DBG(fip,
946 "Invalid MAC addr %pM in FIP adv\n",
947 fcf->fcf_mac);
948 return -EINVAL;
949 }
950 desc_mask &= ~BIT(FIP_DT_MAC);
951 break;
952 case FIP_DT_NAME:
953 if (dlen != sizeof(struct fip_wwn_desc))
954 goto len_err;
955 wwn = (struct fip_wwn_desc *)desc;
956 fcf->switch_name = get_unaligned_be64(&wwn->fd_wwn);
957 desc_mask &= ~BIT(FIP_DT_NAME);
958 break;
959 case FIP_DT_FAB:
960 if (dlen != sizeof(struct fip_fab_desc))
961 goto len_err;
962 fab = (struct fip_fab_desc *)desc;
963 fcf->fabric_name = get_unaligned_be64(&fab->fd_wwn);
964 fcf->vfid = ntohs(fab->fd_vfid);
965 fcf->fc_map = ntoh24(fab->fd_map);
966 desc_mask &= ~BIT(FIP_DT_FAB);
967 break;
968 case FIP_DT_FKA:
969 if (dlen != sizeof(struct fip_fka_desc))
970 goto len_err;
971 fka = (struct fip_fka_desc *)desc;
972 if (fka->fd_flags & FIP_FKA_ADV_D)
973 fcf->fd_flags = 1;
974 t = ntohl(fka->fd_fka_period);
975 if (t >= FCOE_CTLR_MIN_FKA)
976 fcf->fka_period = msecs_to_jiffies(t);
977 desc_mask &= ~BIT(FIP_DT_FKA);
978 break;
979 case FIP_DT_MAP_OUI:
980 case FIP_DT_FCOE_SIZE:
981 case FIP_DT_FLOGI:
982 case FIP_DT_FDISC:
983 case FIP_DT_LOGO:
984 case FIP_DT_ELP:
985 default:
986 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
987 "in FIP adv\n", desc->fip_dtype);
988 /* standard says ignore unknown descriptors >= 128 */
989 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
990 return -EINVAL;
991 break;
992 }
993 desc = (struct fip_desc *)((char *)desc + dlen);
994 rlen -= dlen;
995 }
996 if (!fcf->fc_map || (fcf->fc_map & 0x10000))
997 return -EINVAL;
998 if (!fcf->switch_name)
999 return -EINVAL;
1000 if (desc_mask) {
1001 LIBFCOE_FIP_DBG(fip, "adv missing descriptors mask %x\n",
1002 desc_mask);
1003 return -EINVAL;
1004 }
1005 return 0;
1006
1007len_err:
1008 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1009 desc->fip_dtype, dlen);
1010 return -EINVAL;
1011}
1012
1013/**
1014 * fcoe_ctlr_recv_adv() - Handle an incoming advertisement
1015 * @fip: The FCoE controller receiving the advertisement
1016 * @skb: The received FIP packet
1017 */
1018static void fcoe_ctlr_recv_adv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1019{
1020 struct fcoe_fcf *fcf;
1021 struct fcoe_fcf new;
1022 unsigned long sol_tov = msecs_to_jiffies(FCOE_CTLR_SOL_TOV);
1023 int first = 0;
1024 int mtu_valid;
1025 int found = 0;
1026 int rc = 0;
1027
1028 if (fcoe_ctlr_parse_adv(fip, skb, &new))
1029 return;
1030
1031 mutex_lock(&fip->ctlr_mutex);
1032 first = list_empty(&fip->fcfs);
1033 list_for_each_entry(fcf, &fip->fcfs, list) {
1034 if (fcf->switch_name == new.switch_name &&
1035 fcf->fabric_name == new.fabric_name &&
1036 fcf->fc_map == new.fc_map &&
1037 ether_addr_equal(fcf->fcf_mac, new.fcf_mac)) {
1038 found = 1;
1039 break;
1040 }
1041 }
1042 if (!found) {
1043 if (fip->fcf_count >= FCOE_CTLR_FCF_LIMIT)
1044 goto out;
1045
1046 fcf = kmalloc(sizeof(*fcf), GFP_ATOMIC);
1047 if (!fcf)
1048 goto out;
1049
1050 memcpy(fcf, &new, sizeof(new));
1051 fcf->fip = fip;
1052 rc = fcoe_sysfs_fcf_add(fcf);
1053 if (rc) {
1054 printk(KERN_ERR "Failed to allocate sysfs instance "
1055 "for FCF, fab %16.16llx mac %pM\n",
1056 new.fabric_name, new.fcf_mac);
1057 kfree(fcf);
1058 goto out;
1059 }
1060 } else {
1061 /*
1062 * Update the FCF's keep-alive descriptor flags.
1063 * Other flag changes from new advertisements are
1064 * ignored after a solicited advertisement is
1065 * received and the FCF is selectable (usable).
1066 */
1067 fcf->fd_flags = new.fd_flags;
1068 if (!fcoe_ctlr_fcf_usable(fcf))
1069 fcf->flags = new.flags;
1070
1071 if (fcf == fip->sel_fcf && !fcf->fd_flags) {
1072 fip->ctlr_ka_time -= fcf->fka_period;
1073 fip->ctlr_ka_time += new.fka_period;
1074 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1075 mod_timer(&fip->timer, fip->ctlr_ka_time);
1076 }
1077 fcf->fka_period = new.fka_period;
1078 memcpy(fcf->fcf_mac, new.fcf_mac, ETH_ALEN);
1079 }
1080
1081 mtu_valid = fcoe_ctlr_mtu_valid(fcf);
1082 fcf->time = jiffies;
1083 if (!found)
1084 LIBFCOE_FIP_DBG(fip, "New FCF fab %16.16llx mac %pM\n",
1085 fcf->fabric_name, fcf->fcf_mac);
1086
1087 /*
1088 * If this advertisement is not solicited and our max receive size
1089 * hasn't been verified, send a solicited advertisement.
1090 */
1091 if (!mtu_valid)
1092 fcoe_ctlr_solicit(fip, fcf);
1093
1094 /*
1095 * If its been a while since we did a solicit, and this is
1096 * the first advertisement we've received, do a multicast
1097 * solicitation to gather as many advertisements as we can
1098 * before selection occurs.
1099 */
1100 if (first && time_after(jiffies, fip->sol_time + sol_tov))
1101 fcoe_ctlr_solicit(fip, NULL);
1102
1103 /*
1104 * Put this FCF at the head of the list for priority among equals.
1105 * This helps in the case of an NPV switch which insists we use
1106 * the FCF that answers multicast solicitations, not the others that
1107 * are sending periodic multicast advertisements.
1108 */
1109 if (mtu_valid)
1110 list_move(&fcf->list, &fip->fcfs);
1111
1112 /*
1113 * If this is the first validated FCF, note the time and
1114 * set a timer to trigger selection.
1115 */
1116 if (mtu_valid && !fip->sel_fcf && !fip->sel_time &&
1117 fcoe_ctlr_fcf_usable(fcf)) {
1118 fip->sel_time = jiffies +
1119 msecs_to_jiffies(FCOE_CTLR_START_DELAY);
1120 if (!timer_pending(&fip->timer) ||
1121 time_before(fip->sel_time, fip->timer.expires))
1122 mod_timer(&fip->timer, fip->sel_time);
1123 }
1124
1125out:
1126 mutex_unlock(&fip->ctlr_mutex);
1127}
1128
1129/**
1130 * fcoe_ctlr_recv_els() - Handle an incoming FIP encapsulated ELS frame
1131 * @fip: The FCoE controller which received the packet
1132 * @skb: The received FIP packet
1133 */
1134static void fcoe_ctlr_recv_els(struct fcoe_ctlr *fip, struct sk_buff *skb)
1135{
1136 struct fc_lport *lport = fip->lp;
1137 struct fip_header *fiph;
1138 struct fc_frame *fp = (struct fc_frame *)skb;
1139 struct fc_frame_header *fh = NULL;
1140 struct fip_desc *desc;
1141 struct fip_encaps *els;
1142 struct fcoe_fcf *sel;
1143 enum fip_desc_type els_dtype = 0;
1144 u8 els_op;
1145 u8 sub;
1146 u8 granted_mac[ETH_ALEN] = { 0 };
1147 size_t els_len = 0;
1148 size_t rlen;
1149 size_t dlen;
1150 u32 desc_mask = 0;
1151 u32 desc_cnt = 0;
1152
1153 fiph = (struct fip_header *)skb->data;
1154 sub = fiph->fip_subcode;
1155 if (sub != FIP_SC_REQ && sub != FIP_SC_REP)
1156 goto drop;
1157
1158 rlen = ntohs(fiph->fip_dl_len) * 4;
1159 if (rlen + sizeof(*fiph) > skb->len)
1160 goto drop;
1161
1162 desc = (struct fip_desc *)(fiph + 1);
1163 while (rlen > 0) {
1164 desc_cnt++;
1165 dlen = desc->fip_dlen * FIP_BPW;
1166 if (dlen < sizeof(*desc) || dlen > rlen)
1167 goto drop;
1168 /* Drop ELS if there are duplicate critical descriptors */
1169 if (desc->fip_dtype < 32) {
1170 if ((desc->fip_dtype != FIP_DT_MAC) &&
1171 (desc_mask & 1U << desc->fip_dtype)) {
1172 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1173 "Descriptors in FIP ELS\n");
1174 goto drop;
1175 }
1176 desc_mask |= (1 << desc->fip_dtype);
1177 }
1178 switch (desc->fip_dtype) {
1179 case FIP_DT_MAC:
1180 sel = fip->sel_fcf;
1181 if (desc_cnt == 1) {
1182 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1183 "received out of order\n");
1184 goto drop;
1185 }
1186 /*
1187 * Some switch implementations send two MAC descriptors,
1188 * with first MAC(granted_mac) being the FPMA, and the
1189 * second one(fcoe_mac) is used as destination address
1190 * for sending/receiving FCoE packets. FIP traffic is
1191 * sent using fip_mac. For regular switches, both
1192 * fip_mac and fcoe_mac would be the same.
1193 */
1194 if (desc_cnt == 2)
1195 memcpy(granted_mac,
1196 ((struct fip_mac_desc *)desc)->fd_mac,
1197 ETH_ALEN);
1198
1199 if (dlen != sizeof(struct fip_mac_desc))
1200 goto len_err;
1201
1202 if ((desc_cnt == 3) && (sel))
1203 memcpy(sel->fcoe_mac,
1204 ((struct fip_mac_desc *)desc)->fd_mac,
1205 ETH_ALEN);
1206 break;
1207 case FIP_DT_FLOGI:
1208 case FIP_DT_FDISC:
1209 case FIP_DT_LOGO:
1210 case FIP_DT_ELP:
1211 if (desc_cnt != 1) {
1212 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1213 "received out of order\n");
1214 goto drop;
1215 }
1216 if (fh)
1217 goto drop;
1218 if (dlen < sizeof(*els) + sizeof(*fh) + 1)
1219 goto len_err;
1220 els_len = dlen - sizeof(*els);
1221 els = (struct fip_encaps *)desc;
1222 fh = (struct fc_frame_header *)(els + 1);
1223 els_dtype = desc->fip_dtype;
1224 break;
1225 default:
1226 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
1227 "in FIP adv\n", desc->fip_dtype);
1228 /* standard says ignore unknown descriptors >= 128 */
1229 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
1230 goto drop;
1231 if (desc_cnt <= 2) {
1232 LIBFCOE_FIP_DBG(fip, "FIP descriptors "
1233 "received out of order\n");
1234 goto drop;
1235 }
1236 break;
1237 }
1238 desc = (struct fip_desc *)((char *)desc + dlen);
1239 rlen -= dlen;
1240 }
1241
1242 if (!fh)
1243 goto drop;
1244 els_op = *(u8 *)(fh + 1);
1245
1246 if ((els_dtype == FIP_DT_FLOGI || els_dtype == FIP_DT_FDISC) &&
1247 sub == FIP_SC_REP && fip->mode != FIP_MODE_VN2VN) {
1248 if (els_op == ELS_LS_ACC) {
1249 if (!is_valid_ether_addr(granted_mac)) {
1250 LIBFCOE_FIP_DBG(fip,
1251 "Invalid MAC address %pM in FIP ELS\n",
1252 granted_mac);
1253 goto drop;
1254 }
1255 memcpy(fr_cb(fp)->granted_mac, granted_mac, ETH_ALEN);
1256
1257 if (fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1258 fip->flogi_oxid = FC_XID_UNKNOWN;
1259 if (els_dtype == FIP_DT_FLOGI)
1260 fcoe_ctlr_announce(fip);
1261 }
1262 } else if (els_dtype == FIP_DT_FLOGI &&
1263 !fcoe_ctlr_flogi_retry(fip))
1264 goto drop; /* retrying FLOGI so drop reject */
1265 }
1266
1267 if ((desc_cnt == 0) || ((els_op != ELS_LS_RJT) &&
1268 (!(1U << FIP_DT_MAC & desc_mask)))) {
1269 LIBFCOE_FIP_DBG(fip, "Missing critical descriptors "
1270 "in FIP ELS\n");
1271 goto drop;
1272 }
1273
1274 /*
1275 * Convert skb into an fc_frame containing only the ELS.
1276 */
1277 skb_pull(skb, (u8 *)fh - skb->data);
1278 skb_trim(skb, els_len);
1279 fp = (struct fc_frame *)skb;
1280 fc_frame_init(fp);
1281 fr_sof(fp) = FC_SOF_I3;
1282 fr_eof(fp) = FC_EOF_T;
1283 fr_dev(fp) = lport;
1284 fr_encaps(fp) = els_dtype;
1285
1286 this_cpu_inc(lport->stats->RxFrames);
1287 this_cpu_add(lport->stats->RxWords, skb->len / FIP_BPW);
1288
1289 fc_exch_recv(lport, fp);
1290 return;
1291
1292len_err:
1293 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
1294 desc->fip_dtype, dlen);
1295drop:
1296 kfree_skb(skb);
1297}
1298
1299/**
1300 * fcoe_ctlr_recv_clr_vlink() - Handle an incoming link reset frame
1301 * @fip: The FCoE controller that received the frame
1302 * @skb: The received FIP packet
1303 *
1304 * There may be multiple VN_Port descriptors.
1305 * The overall length has already been checked.
1306 */
1307static void fcoe_ctlr_recv_clr_vlink(struct fcoe_ctlr *fip,
1308 struct sk_buff *skb)
1309{
1310 struct fip_desc *desc;
1311 struct fip_mac_desc *mp;
1312 struct fip_wwn_desc *wp;
1313 struct fip_vn_desc *vp;
1314 size_t rlen;
1315 size_t dlen;
1316 struct fcoe_fcf *fcf = fip->sel_fcf;
1317 struct fc_lport *lport = fip->lp;
1318 struct fc_lport *vn_port = NULL;
1319 u32 desc_mask;
1320 int num_vlink_desc;
1321 int reset_phys_port = 0;
1322 struct fip_vn_desc **vlink_desc_arr = NULL;
1323 struct fip_header *fh = (struct fip_header *)skb->data;
1324 struct ethhdr *eh = eth_hdr(skb);
1325
1326 LIBFCOE_FIP_DBG(fip, "Clear Virtual Link received\n");
1327
1328 if (!fcf) {
1329 /*
1330 * We are yet to select best FCF, but we got CVL in the
1331 * meantime. reset the ctlr and let it rediscover the FCF
1332 */
1333 LIBFCOE_FIP_DBG(fip, "Resetting fcoe_ctlr as FCF has not been "
1334 "selected yet\n");
1335 mutex_lock(&fip->ctlr_mutex);
1336 fcoe_ctlr_reset(fip);
1337 mutex_unlock(&fip->ctlr_mutex);
1338 return;
1339 }
1340
1341 /*
1342 * If we've selected an FCF check that the CVL is from there to avoid
1343 * processing CVLs from an unexpected source. If it is from an
1344 * unexpected source drop it on the floor.
1345 */
1346 if (!ether_addr_equal(eh->h_source, fcf->fcf_mac)) {
1347 LIBFCOE_FIP_DBG(fip, "Dropping CVL due to source address "
1348 "mismatch with FCF src=%pM\n", eh->h_source);
1349 return;
1350 }
1351
1352 /*
1353 * If we haven't logged into the fabric but receive a CVL we should
1354 * reset everything and go back to solicitation.
1355 */
1356 if (!lport->port_id) {
1357 LIBFCOE_FIP_DBG(fip, "lport not logged in, resoliciting\n");
1358 mutex_lock(&fip->ctlr_mutex);
1359 fcoe_ctlr_reset(fip);
1360 mutex_unlock(&fip->ctlr_mutex);
1361 fc_lport_reset(fip->lp);
1362 fcoe_ctlr_solicit(fip, NULL);
1363 return;
1364 }
1365
1366 /*
1367 * mask of required descriptors. Validating each one clears its bit.
1368 */
1369 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
1370
1371 rlen = ntohs(fh->fip_dl_len) * FIP_BPW;
1372 desc = (struct fip_desc *)(fh + 1);
1373
1374 /*
1375 * Actually need to subtract 'sizeof(*mp) - sizeof(*wp)' from 'rlen'
1376 * before determining max Vx_Port descriptor but a buggy FCF could have
1377 * omitted either or both MAC Address and Name Identifier descriptors
1378 */
1379 num_vlink_desc = rlen / sizeof(*vp);
1380 if (num_vlink_desc)
1381 vlink_desc_arr = kmalloc_array(num_vlink_desc, sizeof(vp),
1382 GFP_ATOMIC);
1383 if (!vlink_desc_arr)
1384 return;
1385 num_vlink_desc = 0;
1386
1387 while (rlen >= sizeof(*desc)) {
1388 dlen = desc->fip_dlen * FIP_BPW;
1389 if (dlen > rlen)
1390 goto err;
1391 /* Drop CVL if there are duplicate critical descriptors */
1392 if ((desc->fip_dtype < 32) &&
1393 (desc->fip_dtype != FIP_DT_VN_ID) &&
1394 !(desc_mask & 1U << desc->fip_dtype)) {
1395 LIBFCOE_FIP_DBG(fip, "Duplicate Critical "
1396 "Descriptors in FIP CVL\n");
1397 goto err;
1398 }
1399 switch (desc->fip_dtype) {
1400 case FIP_DT_MAC:
1401 mp = (struct fip_mac_desc *)desc;
1402 if (dlen < sizeof(*mp))
1403 goto err;
1404 if (!ether_addr_equal(mp->fd_mac, fcf->fcf_mac))
1405 goto err;
1406 desc_mask &= ~BIT(FIP_DT_MAC);
1407 break;
1408 case FIP_DT_NAME:
1409 wp = (struct fip_wwn_desc *)desc;
1410 if (dlen < sizeof(*wp))
1411 goto err;
1412 if (get_unaligned_be64(&wp->fd_wwn) != fcf->switch_name)
1413 goto err;
1414 desc_mask &= ~BIT(FIP_DT_NAME);
1415 break;
1416 case FIP_DT_VN_ID:
1417 vp = (struct fip_vn_desc *)desc;
1418 if (dlen < sizeof(*vp))
1419 goto err;
1420 vlink_desc_arr[num_vlink_desc++] = vp;
1421 vn_port = fc_vport_id_lookup(lport,
1422 ntoh24(vp->fd_fc_id));
1423 if (vn_port && (vn_port == lport)) {
1424 mutex_lock(&fip->ctlr_mutex);
1425 this_cpu_inc(lport->stats->VLinkFailureCount);
1426 fcoe_ctlr_reset(fip);
1427 mutex_unlock(&fip->ctlr_mutex);
1428 }
1429 break;
1430 default:
1431 /* standard says ignore unknown descriptors >= 128 */
1432 if (desc->fip_dtype < FIP_DT_NON_CRITICAL)
1433 goto err;
1434 break;
1435 }
1436 desc = (struct fip_desc *)((char *)desc + dlen);
1437 rlen -= dlen;
1438 }
1439
1440 /*
1441 * reset only if all required descriptors were present and valid.
1442 */
1443 if (desc_mask)
1444 LIBFCOE_FIP_DBG(fip, "missing descriptors mask %x\n",
1445 desc_mask);
1446 else if (!num_vlink_desc) {
1447 LIBFCOE_FIP_DBG(fip, "CVL: no Vx_Port descriptor found\n");
1448 /*
1449 * No Vx_Port description. Clear all NPIV ports,
1450 * followed by physical port
1451 */
1452 mutex_lock(&fip->ctlr_mutex);
1453 this_cpu_inc(lport->stats->VLinkFailureCount);
1454 fcoe_ctlr_reset(fip);
1455 mutex_unlock(&fip->ctlr_mutex);
1456
1457 mutex_lock(&lport->lp_mutex);
1458 list_for_each_entry(vn_port, &lport->vports, list)
1459 fc_lport_reset(vn_port);
1460 mutex_unlock(&lport->lp_mutex);
1461
1462 fc_lport_reset(fip->lp);
1463 fcoe_ctlr_solicit(fip, NULL);
1464 } else {
1465 int i;
1466
1467 LIBFCOE_FIP_DBG(fip, "performing Clear Virtual Link\n");
1468 for (i = 0; i < num_vlink_desc; i++) {
1469 vp = vlink_desc_arr[i];
1470 vn_port = fc_vport_id_lookup(lport,
1471 ntoh24(vp->fd_fc_id));
1472 if (!vn_port)
1473 continue;
1474
1475 /*
1476 * 'port_id' is already validated, check MAC address and
1477 * wwpn
1478 */
1479 if (!ether_addr_equal(fip->get_src_addr(vn_port),
1480 vp->fd_mac) ||
1481 get_unaligned_be64(&vp->fd_wwpn) !=
1482 vn_port->wwpn)
1483 continue;
1484
1485 if (vn_port == lport)
1486 /*
1487 * Physical port, defer processing till all
1488 * listed NPIV ports are cleared
1489 */
1490 reset_phys_port = 1;
1491 else /* NPIV port */
1492 fc_lport_reset(vn_port);
1493 }
1494
1495 if (reset_phys_port) {
1496 fc_lport_reset(fip->lp);
1497 fcoe_ctlr_solicit(fip, NULL);
1498 }
1499 }
1500
1501err:
1502 kfree(vlink_desc_arr);
1503}
1504
1505/**
1506 * fcoe_ctlr_recv() - Receive a FIP packet
1507 * @fip: The FCoE controller that received the packet
1508 * @skb: The received FIP packet
1509 *
1510 * This may be called from either NET_RX_SOFTIRQ or IRQ.
1511 */
1512void fcoe_ctlr_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
1513{
1514 skb = skb_share_check(skb, GFP_ATOMIC);
1515 if (!skb)
1516 return;
1517 skb_queue_tail(&fip->fip_recv_list, skb);
1518 schedule_work(&fip->recv_work);
1519}
1520EXPORT_SYMBOL(fcoe_ctlr_recv);
1521
1522/**
1523 * fcoe_ctlr_recv_handler() - Receive a FIP frame
1524 * @fip: The FCoE controller that received the frame
1525 * @skb: The received FIP frame
1526 *
1527 * Returns non-zero if the frame is dropped.
1528 */
1529static int fcoe_ctlr_recv_handler(struct fcoe_ctlr *fip, struct sk_buff *skb)
1530{
1531 struct fip_header *fiph;
1532 struct ethhdr *eh;
1533 enum fip_state state;
1534 bool fip_vlan_resp = false;
1535 u16 op;
1536 u8 sub;
1537
1538 if (skb_linearize(skb))
1539 goto drop;
1540 if (skb->len < sizeof(*fiph))
1541 goto drop;
1542 eh = eth_hdr(skb);
1543 if (fip->mode == FIP_MODE_VN2VN) {
1544 if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1545 !ether_addr_equal(eh->h_dest, fcoe_all_vn2vn) &&
1546 !ether_addr_equal(eh->h_dest, fcoe_all_p2p))
1547 goto drop;
1548 } else if (!ether_addr_equal(eh->h_dest, fip->ctl_src_addr) &&
1549 !ether_addr_equal(eh->h_dest, fcoe_all_enode))
1550 goto drop;
1551 fiph = (struct fip_header *)skb->data;
1552 op = ntohs(fiph->fip_op);
1553 sub = fiph->fip_subcode;
1554
1555 if (FIP_VER_DECAPS(fiph->fip_ver) != FIP_VER)
1556 goto drop;
1557 if (ntohs(fiph->fip_dl_len) * FIP_BPW + sizeof(*fiph) > skb->len)
1558 goto drop;
1559
1560 mutex_lock(&fip->ctlr_mutex);
1561 state = fip->state;
1562 if (state == FIP_ST_AUTO) {
1563 fip->map_dest = 0;
1564 fcoe_ctlr_set_state(fip, FIP_ST_ENABLED);
1565 state = FIP_ST_ENABLED;
1566 LIBFCOE_FIP_DBG(fip, "Using FIP mode\n");
1567 }
1568 fip_vlan_resp = fip->fip_resp;
1569 mutex_unlock(&fip->ctlr_mutex);
1570
1571 if (fip->mode == FIP_MODE_VN2VN && op == FIP_OP_VN2VN)
1572 return fcoe_ctlr_vn_recv(fip, skb);
1573
1574 if (fip_vlan_resp && op == FIP_OP_VLAN) {
1575 LIBFCOE_FIP_DBG(fip, "fip vlan discovery\n");
1576 return fcoe_ctlr_vlan_recv(fip, skb);
1577 }
1578
1579 if (state != FIP_ST_ENABLED && state != FIP_ST_VNMP_UP &&
1580 state != FIP_ST_VNMP_CLAIM)
1581 goto drop;
1582
1583 if (op == FIP_OP_LS) {
1584 fcoe_ctlr_recv_els(fip, skb); /* consumes skb */
1585 return 0;
1586 }
1587
1588 if (state != FIP_ST_ENABLED)
1589 goto drop;
1590
1591 if (op == FIP_OP_DISC && sub == FIP_SC_ADV)
1592 fcoe_ctlr_recv_adv(fip, skb);
1593 else if (op == FIP_OP_CTRL && sub == FIP_SC_CLR_VLINK)
1594 fcoe_ctlr_recv_clr_vlink(fip, skb);
1595 kfree_skb(skb);
1596 return 0;
1597drop:
1598 kfree_skb(skb);
1599 return -1;
1600}
1601
1602/**
1603 * fcoe_ctlr_select() - Select the best FCF (if possible)
1604 * @fip: The FCoE controller
1605 *
1606 * Returns the selected FCF, or NULL if none are usable.
1607 *
1608 * If there are conflicting advertisements, no FCF can be chosen.
1609 *
1610 * If there is already a selected FCF, this will choose a better one or
1611 * an equivalent one that hasn't already been sent a FLOGI.
1612 *
1613 * Called with lock held.
1614 */
1615static struct fcoe_fcf *fcoe_ctlr_select(struct fcoe_ctlr *fip)
1616{
1617 struct fcoe_fcf *fcf;
1618 struct fcoe_fcf *best = fip->sel_fcf;
1619
1620 list_for_each_entry(fcf, &fip->fcfs, list) {
1621 LIBFCOE_FIP_DBG(fip, "consider FCF fab %16.16llx "
1622 "VFID %d mac %pM map %x val %d "
1623 "sent %u pri %u\n",
1624 fcf->fabric_name, fcf->vfid, fcf->fcf_mac,
1625 fcf->fc_map, fcoe_ctlr_mtu_valid(fcf),
1626 fcf->flogi_sent, fcf->pri);
1627 if (!fcoe_ctlr_fcf_usable(fcf)) {
1628 LIBFCOE_FIP_DBG(fip, "FCF for fab %16.16llx "
1629 "map %x %svalid %savailable\n",
1630 fcf->fabric_name, fcf->fc_map,
1631 (fcf->flags & FIP_FL_SOL) ? "" : "in",
1632 (fcf->flags & FIP_FL_AVAIL) ?
1633 "" : "un");
1634 continue;
1635 }
1636 if (!best || fcf->pri < best->pri || best->flogi_sent)
1637 best = fcf;
1638 if (fcf->fabric_name != best->fabric_name ||
1639 fcf->vfid != best->vfid ||
1640 fcf->fc_map != best->fc_map) {
1641 LIBFCOE_FIP_DBG(fip, "Conflicting fabric, VFID, "
1642 "or FC-MAP\n");
1643 return NULL;
1644 }
1645 }
1646 fip->sel_fcf = best;
1647 if (best) {
1648 LIBFCOE_FIP_DBG(fip, "using FCF mac %pM\n", best->fcf_mac);
1649 fip->port_ka_time = jiffies +
1650 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1651 fip->ctlr_ka_time = jiffies + best->fka_period;
1652 if (time_before(fip->ctlr_ka_time, fip->timer.expires))
1653 mod_timer(&fip->timer, fip->ctlr_ka_time);
1654 }
1655 return best;
1656}
1657
1658/**
1659 * fcoe_ctlr_flogi_send_locked() - send FIP-encapsulated FLOGI to current FCF
1660 * @fip: The FCoE controller
1661 *
1662 * Returns non-zero error if it could not be sent.
1663 *
1664 * Called with ctlr_mutex and ctlr_lock held.
1665 * Caller must verify that fip->sel_fcf is not NULL.
1666 */
1667static int fcoe_ctlr_flogi_send_locked(struct fcoe_ctlr *fip)
1668{
1669 struct sk_buff *skb;
1670 struct sk_buff *skb_orig;
1671 struct fc_frame_header *fh;
1672 int error;
1673
1674 skb_orig = fip->flogi_req;
1675 if (!skb_orig)
1676 return -EINVAL;
1677
1678 /*
1679 * Clone and send the FLOGI request. If clone fails, use original.
1680 */
1681 skb = skb_clone(skb_orig, GFP_ATOMIC);
1682 if (!skb) {
1683 skb = skb_orig;
1684 fip->flogi_req = NULL;
1685 }
1686 fh = (struct fc_frame_header *)skb->data;
1687 error = fcoe_ctlr_encaps(fip, fip->lp, FIP_DT_FLOGI, skb,
1688 ntoh24(fh->fh_d_id));
1689 if (error) {
1690 kfree_skb(skb);
1691 return error;
1692 }
1693 fip->send(fip, skb);
1694 fip->sel_fcf->flogi_sent = 1;
1695 return 0;
1696}
1697
1698/**
1699 * fcoe_ctlr_flogi_retry() - resend FLOGI request to a new FCF if possible
1700 * @fip: The FCoE controller
1701 *
1702 * Returns non-zero error code if there's no FLOGI request to retry or
1703 * no alternate FCF available.
1704 */
1705static int fcoe_ctlr_flogi_retry(struct fcoe_ctlr *fip)
1706{
1707 struct fcoe_fcf *fcf;
1708 int error;
1709
1710 mutex_lock(&fip->ctlr_mutex);
1711 spin_lock_bh(&fip->ctlr_lock);
1712 LIBFCOE_FIP_DBG(fip, "re-sending FLOGI - reselect\n");
1713 fcf = fcoe_ctlr_select(fip);
1714 if (!fcf || fcf->flogi_sent) {
1715 kfree_skb(fip->flogi_req);
1716 fip->flogi_req = NULL;
1717 error = -ENOENT;
1718 } else {
1719 fcoe_ctlr_solicit(fip, NULL);
1720 error = fcoe_ctlr_flogi_send_locked(fip);
1721 }
1722 spin_unlock_bh(&fip->ctlr_lock);
1723 mutex_unlock(&fip->ctlr_mutex);
1724 return error;
1725}
1726
1727
1728/**
1729 * fcoe_ctlr_flogi_send() - Handle sending of FIP FLOGI.
1730 * @fip: The FCoE controller that timed out
1731 *
1732 * Done here because fcoe_ctlr_els_send() can't get mutex.
1733 *
1734 * Called with ctlr_mutex held. The caller must not hold ctlr_lock.
1735 */
1736static void fcoe_ctlr_flogi_send(struct fcoe_ctlr *fip)
1737{
1738 struct fcoe_fcf *fcf;
1739
1740 spin_lock_bh(&fip->ctlr_lock);
1741 fcf = fip->sel_fcf;
1742 if (!fcf || !fip->flogi_req_send)
1743 goto unlock;
1744
1745 LIBFCOE_FIP_DBG(fip, "sending FLOGI\n");
1746
1747 /*
1748 * If this FLOGI is being sent due to a timeout retry
1749 * to the same FCF as before, select a different FCF if possible.
1750 */
1751 if (fcf->flogi_sent) {
1752 LIBFCOE_FIP_DBG(fip, "sending FLOGI - reselect\n");
1753 fcf = fcoe_ctlr_select(fip);
1754 if (!fcf || fcf->flogi_sent) {
1755 LIBFCOE_FIP_DBG(fip, "sending FLOGI - clearing\n");
1756 list_for_each_entry(fcf, &fip->fcfs, list)
1757 fcf->flogi_sent = 0;
1758 fcf = fcoe_ctlr_select(fip);
1759 }
1760 }
1761 if (fcf) {
1762 fcoe_ctlr_flogi_send_locked(fip);
1763 fip->flogi_req_send = 0;
1764 } else /* XXX */
1765 LIBFCOE_FIP_DBG(fip, "No FCF selected - defer send\n");
1766unlock:
1767 spin_unlock_bh(&fip->ctlr_lock);
1768}
1769
1770/**
1771 * fcoe_ctlr_timeout() - FIP timeout handler
1772 * @t: Timer context use to obtain the controller reference
1773 */
1774static void fcoe_ctlr_timeout(struct timer_list *t)
1775{
1776 struct fcoe_ctlr *fip = from_timer(fip, t, timer);
1777
1778 schedule_work(&fip->timer_work);
1779}
1780
1781/**
1782 * fcoe_ctlr_timer_work() - Worker thread function for timer work
1783 * @work: Handle to a FCoE controller
1784 *
1785 * Ages FCFs. Triggers FCF selection if possible.
1786 * Sends keep-alives and resets.
1787 */
1788static void fcoe_ctlr_timer_work(struct work_struct *work)
1789{
1790 struct fcoe_ctlr *fip;
1791 struct fc_lport *vport;
1792 u8 *mac;
1793 u8 reset = 0;
1794 u8 send_ctlr_ka = 0;
1795 u8 send_port_ka = 0;
1796 struct fcoe_fcf *sel;
1797 struct fcoe_fcf *fcf;
1798 unsigned long next_timer;
1799
1800 fip = container_of(work, struct fcoe_ctlr, timer_work);
1801 if (fip->mode == FIP_MODE_VN2VN)
1802 return fcoe_ctlr_vn_timeout(fip);
1803 mutex_lock(&fip->ctlr_mutex);
1804 if (fip->state == FIP_ST_DISABLED) {
1805 mutex_unlock(&fip->ctlr_mutex);
1806 return;
1807 }
1808
1809 fcf = fip->sel_fcf;
1810 next_timer = fcoe_ctlr_age_fcfs(fip);
1811
1812 sel = fip->sel_fcf;
1813 if (!sel && fip->sel_time) {
1814 if (time_after_eq(jiffies, fip->sel_time)) {
1815 sel = fcoe_ctlr_select(fip);
1816 fip->sel_time = 0;
1817 } else if (time_after(next_timer, fip->sel_time))
1818 next_timer = fip->sel_time;
1819 }
1820
1821 if (sel && fip->flogi_req_send)
1822 fcoe_ctlr_flogi_send(fip);
1823 else if (!sel && fcf)
1824 reset = 1;
1825
1826 if (sel && !sel->fd_flags) {
1827 if (time_after_eq(jiffies, fip->ctlr_ka_time)) {
1828 fip->ctlr_ka_time = jiffies + sel->fka_period;
1829 send_ctlr_ka = 1;
1830 }
1831 if (time_after(next_timer, fip->ctlr_ka_time))
1832 next_timer = fip->ctlr_ka_time;
1833
1834 if (time_after_eq(jiffies, fip->port_ka_time)) {
1835 fip->port_ka_time = jiffies +
1836 msecs_to_jiffies(FIP_VN_KA_PERIOD);
1837 send_port_ka = 1;
1838 }
1839 if (time_after(next_timer, fip->port_ka_time))
1840 next_timer = fip->port_ka_time;
1841 }
1842 if (!list_empty(&fip->fcfs))
1843 mod_timer(&fip->timer, next_timer);
1844 mutex_unlock(&fip->ctlr_mutex);
1845
1846 if (reset) {
1847 fc_lport_reset(fip->lp);
1848 /* restart things with a solicitation */
1849 fcoe_ctlr_solicit(fip, NULL);
1850 }
1851
1852 if (send_ctlr_ka)
1853 fcoe_ctlr_send_keep_alive(fip, NULL, 0, fip->ctl_src_addr);
1854
1855 if (send_port_ka) {
1856 mutex_lock(&fip->lp->lp_mutex);
1857 mac = fip->get_src_addr(fip->lp);
1858 fcoe_ctlr_send_keep_alive(fip, fip->lp, 1, mac);
1859 list_for_each_entry(vport, &fip->lp->vports, list) {
1860 mac = fip->get_src_addr(vport);
1861 fcoe_ctlr_send_keep_alive(fip, vport, 1, mac);
1862 }
1863 mutex_unlock(&fip->lp->lp_mutex);
1864 }
1865}
1866
1867/**
1868 * fcoe_ctlr_recv_work() - Worker thread function for receiving FIP frames
1869 * @recv_work: Handle to a FCoE controller
1870 */
1871static void fcoe_ctlr_recv_work(struct work_struct *recv_work)
1872{
1873 struct fcoe_ctlr *fip;
1874 struct sk_buff *skb;
1875
1876 fip = container_of(recv_work, struct fcoe_ctlr, recv_work);
1877 while ((skb = skb_dequeue(&fip->fip_recv_list)))
1878 fcoe_ctlr_recv_handler(fip, skb);
1879}
1880
1881/**
1882 * fcoe_ctlr_recv_flogi() - Snoop pre-FIP receipt of FLOGI response
1883 * @fip: The FCoE controller
1884 * @lport: The local port
1885 * @fp: The FC frame to snoop
1886 *
1887 * Snoop potential response to FLOGI or even incoming FLOGI.
1888 *
1889 * The caller has checked that we are waiting for login as indicated
1890 * by fip->flogi_oxid != FC_XID_UNKNOWN.
1891 *
1892 * The caller is responsible for freeing the frame.
1893 * Fill in the granted_mac address.
1894 *
1895 * Return non-zero if the frame should not be delivered to libfc.
1896 */
1897int fcoe_ctlr_recv_flogi(struct fcoe_ctlr *fip, struct fc_lport *lport,
1898 struct fc_frame *fp)
1899{
1900 struct fc_frame_header *fh;
1901 u8 op;
1902 u8 *sa;
1903
1904 sa = eth_hdr(&fp->skb)->h_source;
1905 fh = fc_frame_header_get(fp);
1906 if (fh->fh_type != FC_TYPE_ELS)
1907 return 0;
1908
1909 op = fc_frame_payload_op(fp);
1910 if (op == ELS_LS_ACC && fh->fh_r_ctl == FC_RCTL_ELS_REP &&
1911 fip->flogi_oxid == ntohs(fh->fh_ox_id)) {
1912
1913 mutex_lock(&fip->ctlr_mutex);
1914 if (fip->state != FIP_ST_AUTO && fip->state != FIP_ST_NON_FIP) {
1915 mutex_unlock(&fip->ctlr_mutex);
1916 return -EINVAL;
1917 }
1918 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1919 LIBFCOE_FIP_DBG(fip,
1920 "received FLOGI LS_ACC using non-FIP mode\n");
1921
1922 /*
1923 * FLOGI accepted.
1924 * If the src mac addr is FC_OUI-based, then we mark the
1925 * address_mode flag to use FC_OUI-based Ethernet DA.
1926 * Otherwise we use the FCoE gateway addr
1927 */
1928 if (ether_addr_equal(sa, (u8[6])FC_FCOE_FLOGI_MAC)) {
1929 fcoe_ctlr_map_dest(fip);
1930 } else {
1931 memcpy(fip->dest_addr, sa, ETH_ALEN);
1932 fip->map_dest = 0;
1933 }
1934 fip->flogi_oxid = FC_XID_UNKNOWN;
1935 mutex_unlock(&fip->ctlr_mutex);
1936 fc_fcoe_set_mac(fr_cb(fp)->granted_mac, fh->fh_d_id);
1937 } else if (op == ELS_FLOGI && fh->fh_r_ctl == FC_RCTL_ELS_REQ && sa) {
1938 /*
1939 * Save source MAC for point-to-point responses.
1940 */
1941 mutex_lock(&fip->ctlr_mutex);
1942 if (fip->state == FIP_ST_AUTO || fip->state == FIP_ST_NON_FIP) {
1943 memcpy(fip->dest_addr, sa, ETH_ALEN);
1944 fip->map_dest = 0;
1945 if (fip->state == FIP_ST_AUTO)
1946 LIBFCOE_FIP_DBG(fip, "received non-FIP FLOGI. "
1947 "Setting non-FIP mode\n");
1948 fcoe_ctlr_set_state(fip, FIP_ST_NON_FIP);
1949 }
1950 mutex_unlock(&fip->ctlr_mutex);
1951 }
1952 return 0;
1953}
1954EXPORT_SYMBOL(fcoe_ctlr_recv_flogi);
1955
1956/**
1957 * fcoe_wwn_from_mac() - Converts a 48-bit IEEE MAC address to a 64-bit FC WWN
1958 * @mac: The MAC address to convert
1959 * @scheme: The scheme to use when converting
1960 * @port: The port indicator for converting
1961 *
1962 * Returns: u64 fc world wide name
1963 */
1964u64 fcoe_wwn_from_mac(unsigned char mac[ETH_ALEN],
1965 unsigned int scheme, unsigned int port)
1966{
1967 u64 wwn;
1968 u64 host_mac;
1969
1970 /* The MAC is in NO, so flip only the low 48 bits */
1971 host_mac = ((u64) mac[0] << 40) |
1972 ((u64) mac[1] << 32) |
1973 ((u64) mac[2] << 24) |
1974 ((u64) mac[3] << 16) |
1975 ((u64) mac[4] << 8) |
1976 (u64) mac[5];
1977
1978 WARN_ON(host_mac >= (1ULL << 48));
1979 wwn = host_mac | ((u64) scheme << 60);
1980 switch (scheme) {
1981 case 1:
1982 WARN_ON(port != 0);
1983 break;
1984 case 2:
1985 WARN_ON(port >= 0xfff);
1986 wwn |= (u64) port << 48;
1987 break;
1988 default:
1989 WARN_ON(1);
1990 break;
1991 }
1992
1993 return wwn;
1994}
1995EXPORT_SYMBOL_GPL(fcoe_wwn_from_mac);
1996
1997/**
1998 * fcoe_ctlr_rport() - return the fcoe_rport for a given fc_rport_priv
1999 * @rdata: libfc remote port
2000 */
2001static inline struct fcoe_rport *fcoe_ctlr_rport(struct fc_rport_priv *rdata)
2002{
2003 return container_of(rdata, struct fcoe_rport, rdata);
2004}
2005
2006/**
2007 * fcoe_ctlr_vn_send() - Send a FIP VN2VN Probe Request or Reply.
2008 * @fip: The FCoE controller
2009 * @sub: sub-opcode for probe request, reply, or advertisement.
2010 * @dest: The destination Ethernet MAC address
2011 * @min_len: minimum size of the Ethernet payload to be sent
2012 */
2013static void fcoe_ctlr_vn_send(struct fcoe_ctlr *fip,
2014 enum fip_vn2vn_subcode sub,
2015 const u8 *dest, size_t min_len)
2016{
2017 struct sk_buff *skb;
2018 struct fip_vn2vn_probe_frame {
2019 struct ethhdr eth;
2020 struct fip_header fip;
2021 struct fip_mac_desc mac;
2022 struct fip_wwn_desc wwnn;
2023 struct fip_vn_desc vn;
2024 } __packed * frame;
2025 struct fip_fc4_feat *ff;
2026 struct fip_size_desc *size;
2027 u32 fcp_feat;
2028 size_t len;
2029 size_t dlen;
2030
2031 len = sizeof(*frame);
2032 dlen = 0;
2033 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2034 dlen = sizeof(struct fip_fc4_feat) +
2035 sizeof(struct fip_size_desc);
2036 len += dlen;
2037 }
2038 dlen += sizeof(frame->mac) + sizeof(frame->wwnn) + sizeof(frame->vn);
2039 len = max(len, min_len + sizeof(struct ethhdr));
2040
2041 skb = dev_alloc_skb(len);
2042 if (!skb)
2043 return;
2044
2045 frame = (struct fip_vn2vn_probe_frame *)skb->data;
2046 memset(frame, 0, len);
2047 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2048
2049 if (sub == FIP_SC_VN_BEACON) {
2050 hton24(frame->eth.h_source, FIP_VN_FC_MAP);
2051 hton24(frame->eth.h_source + 3, fip->port_id);
2052 } else {
2053 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2054 }
2055 frame->eth.h_proto = htons(ETH_P_FIP);
2056
2057 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2058 frame->fip.fip_op = htons(FIP_OP_VN2VN);
2059 frame->fip.fip_subcode = sub;
2060 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2061
2062 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2063 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2064 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2065
2066 frame->wwnn.fd_desc.fip_dtype = FIP_DT_NAME;
2067 frame->wwnn.fd_desc.fip_dlen = sizeof(frame->wwnn) / FIP_BPW;
2068 put_unaligned_be64(fip->lp->wwnn, &frame->wwnn.fd_wwn);
2069
2070 frame->vn.fd_desc.fip_dtype = FIP_DT_VN_ID;
2071 frame->vn.fd_desc.fip_dlen = sizeof(frame->vn) / FIP_BPW;
2072 hton24(frame->vn.fd_mac, FIP_VN_FC_MAP);
2073 hton24(frame->vn.fd_mac + 3, fip->port_id);
2074 hton24(frame->vn.fd_fc_id, fip->port_id);
2075 put_unaligned_be64(fip->lp->wwpn, &frame->vn.fd_wwpn);
2076
2077 /*
2078 * For claims, add FC-4 features.
2079 * TBD: Add interface to get fc-4 types and features from libfc.
2080 */
2081 if (sub == FIP_SC_VN_CLAIM_NOTIFY || sub == FIP_SC_VN_CLAIM_REP) {
2082 ff = (struct fip_fc4_feat *)(frame + 1);
2083 ff->fd_desc.fip_dtype = FIP_DT_FC4F;
2084 ff->fd_desc.fip_dlen = sizeof(*ff) / FIP_BPW;
2085 ff->fd_fts = fip->lp->fcts;
2086
2087 fcp_feat = 0;
2088 if (fip->lp->service_params & FCP_SPPF_INIT_FCN)
2089 fcp_feat |= FCP_FEAT_INIT;
2090 if (fip->lp->service_params & FCP_SPPF_TARG_FCN)
2091 fcp_feat |= FCP_FEAT_TARG;
2092 fcp_feat <<= (FC_TYPE_FCP * 4) % 32;
2093 ff->fd_ff.fd_feat[FC_TYPE_FCP * 4 / 32] = htonl(fcp_feat);
2094
2095 size = (struct fip_size_desc *)(ff + 1);
2096 size->fd_desc.fip_dtype = FIP_DT_FCOE_SIZE;
2097 size->fd_desc.fip_dlen = sizeof(*size) / FIP_BPW;
2098 size->fd_size = htons(fcoe_ctlr_fcoe_size(fip));
2099 }
2100
2101 skb_put(skb, len);
2102 skb->protocol = htons(ETH_P_FIP);
2103 skb->priority = fip->priority;
2104 skb_reset_mac_header(skb);
2105 skb_reset_network_header(skb);
2106
2107 fip->send(fip, skb);
2108}
2109
2110/**
2111 * fcoe_ctlr_vn_rport_callback - Event handler for rport events.
2112 * @lport: The lport which is receiving the event
2113 * @rdata: remote port private data
2114 * @event: The event that occurred
2115 *
2116 * Locking Note: The rport lock must not be held when calling this function.
2117 */
2118static void fcoe_ctlr_vn_rport_callback(struct fc_lport *lport,
2119 struct fc_rport_priv *rdata,
2120 enum fc_rport_event event)
2121{
2122 struct fcoe_ctlr *fip = lport->disc.priv;
2123 struct fcoe_rport *frport = fcoe_ctlr_rport(rdata);
2124
2125 LIBFCOE_FIP_DBG(fip, "vn_rport_callback %x event %d\n",
2126 rdata->ids.port_id, event);
2127
2128 mutex_lock(&fip->ctlr_mutex);
2129 switch (event) {
2130 case RPORT_EV_READY:
2131 frport->login_count = 0;
2132 break;
2133 case RPORT_EV_LOGO:
2134 case RPORT_EV_FAILED:
2135 case RPORT_EV_STOP:
2136 frport->login_count++;
2137 if (frport->login_count > FCOE_CTLR_VN2VN_LOGIN_LIMIT) {
2138 LIBFCOE_FIP_DBG(fip,
2139 "rport FLOGI limited port_id %6.6x\n",
2140 rdata->ids.port_id);
2141 fc_rport_logoff(rdata);
2142 }
2143 break;
2144 default:
2145 break;
2146 }
2147 mutex_unlock(&fip->ctlr_mutex);
2148}
2149
2150static struct fc_rport_operations fcoe_ctlr_vn_rport_ops = {
2151 .event_callback = fcoe_ctlr_vn_rport_callback,
2152};
2153
2154/**
2155 * fcoe_ctlr_disc_stop_locked() - stop discovery in VN2VN mode
2156 * @lport: The local port
2157 *
2158 * Called with ctlr_mutex held.
2159 */
2160static void fcoe_ctlr_disc_stop_locked(struct fc_lport *lport)
2161{
2162 struct fc_rport_priv *rdata;
2163
2164 mutex_lock(&lport->disc.disc_mutex);
2165 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2166 if (kref_get_unless_zero(&rdata->kref)) {
2167 fc_rport_logoff(rdata);
2168 kref_put(&rdata->kref, fc_rport_destroy);
2169 }
2170 }
2171 lport->disc.disc_callback = NULL;
2172 mutex_unlock(&lport->disc.disc_mutex);
2173}
2174
2175/**
2176 * fcoe_ctlr_disc_stop() - stop discovery in VN2VN mode
2177 * @lport: The local port
2178 *
2179 * Called through the local port template for discovery.
2180 * Called without the ctlr_mutex held.
2181 */
2182static void fcoe_ctlr_disc_stop(struct fc_lport *lport)
2183{
2184 struct fcoe_ctlr *fip = lport->disc.priv;
2185
2186 mutex_lock(&fip->ctlr_mutex);
2187 fcoe_ctlr_disc_stop_locked(lport);
2188 mutex_unlock(&fip->ctlr_mutex);
2189}
2190
2191/**
2192 * fcoe_ctlr_disc_stop_final() - stop discovery for shutdown in VN2VN mode
2193 * @lport: The local port
2194 *
2195 * Called through the local port template for discovery.
2196 * Called without the ctlr_mutex held.
2197 */
2198static void fcoe_ctlr_disc_stop_final(struct fc_lport *lport)
2199{
2200 fcoe_ctlr_disc_stop(lport);
2201 fc_rport_flush_queue();
2202 synchronize_rcu();
2203}
2204
2205/**
2206 * fcoe_ctlr_vn_restart() - VN2VN probe restart with new port_id
2207 * @fip: The FCoE controller
2208 *
2209 * Called with fcoe_ctlr lock held.
2210 */
2211static void fcoe_ctlr_vn_restart(struct fcoe_ctlr *fip)
2212{
2213 unsigned long wait;
2214 u32 port_id;
2215
2216 fcoe_ctlr_disc_stop_locked(fip->lp);
2217
2218 /*
2219 * Get proposed port ID.
2220 * If this is the first try after link up, use any previous port_id.
2221 * If there was none, use the low bits of the port_name.
2222 * On subsequent tries, get the next random one.
2223 * Don't use reserved IDs, use another non-zero value, just as random.
2224 */
2225 port_id = fip->port_id;
2226 if (fip->probe_tries)
2227 port_id = prandom_u32_state(&fip->rnd_state) & 0xffff;
2228 else if (!port_id)
2229 port_id = fip->lp->wwpn & 0xffff;
2230 if (!port_id || port_id == 0xffff)
2231 port_id = 1;
2232 fip->port_id = port_id;
2233
2234 if (fip->probe_tries < FIP_VN_RLIM_COUNT) {
2235 fip->probe_tries++;
2236 wait = get_random_u32_below(FIP_VN_PROBE_WAIT);
2237 } else
2238 wait = FIP_VN_RLIM_INT;
2239 mod_timer(&fip->timer, jiffies + msecs_to_jiffies(wait));
2240 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_START);
2241}
2242
2243/**
2244 * fcoe_ctlr_vn_start() - Start in VN2VN mode
2245 * @fip: The FCoE controller
2246 *
2247 * Called with fcoe_ctlr lock held.
2248 */
2249static void fcoe_ctlr_vn_start(struct fcoe_ctlr *fip)
2250{
2251 fip->probe_tries = 0;
2252 prandom_seed_state(&fip->rnd_state, fip->lp->wwpn);
2253 fcoe_ctlr_vn_restart(fip);
2254}
2255
2256/**
2257 * fcoe_ctlr_vn_parse - parse probe request or response
2258 * @fip: The FCoE controller
2259 * @skb: incoming packet
2260 * @frport: parsed FCoE rport from the probe request
2261 *
2262 * Returns non-zero error number on error.
2263 * Does not consume the packet.
2264 */
2265static int fcoe_ctlr_vn_parse(struct fcoe_ctlr *fip,
2266 struct sk_buff *skb,
2267 struct fcoe_rport *frport)
2268{
2269 struct fip_header *fiph;
2270 struct fip_desc *desc = NULL;
2271 struct fip_mac_desc *macd = NULL;
2272 struct fip_wwn_desc *wwn = NULL;
2273 struct fip_vn_desc *vn = NULL;
2274 struct fip_size_desc *size = NULL;
2275 size_t rlen;
2276 size_t dlen;
2277 u32 desc_mask = 0;
2278 u32 dtype;
2279 u8 sub;
2280
2281 fiph = (struct fip_header *)skb->data;
2282 frport->flags = ntohs(fiph->fip_flags);
2283
2284 sub = fiph->fip_subcode;
2285 switch (sub) {
2286 case FIP_SC_VN_PROBE_REQ:
2287 case FIP_SC_VN_PROBE_REP:
2288 case FIP_SC_VN_BEACON:
2289 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2290 BIT(FIP_DT_VN_ID);
2291 break;
2292 case FIP_SC_VN_CLAIM_NOTIFY:
2293 case FIP_SC_VN_CLAIM_REP:
2294 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME) |
2295 BIT(FIP_DT_VN_ID) | BIT(FIP_DT_FC4F) |
2296 BIT(FIP_DT_FCOE_SIZE);
2297 break;
2298 default:
2299 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2300 return -EINVAL;
2301 }
2302
2303 rlen = ntohs(fiph->fip_dl_len) * 4;
2304 if (rlen + sizeof(*fiph) > skb->len)
2305 return -EINVAL;
2306
2307 desc = (struct fip_desc *)(fiph + 1);
2308 while (rlen > 0) {
2309 dlen = desc->fip_dlen * FIP_BPW;
2310 if (dlen < sizeof(*desc) || dlen > rlen)
2311 return -EINVAL;
2312
2313 dtype = desc->fip_dtype;
2314 if (dtype < 32) {
2315 if (!(desc_mask & BIT(dtype))) {
2316 LIBFCOE_FIP_DBG(fip,
2317 "unexpected or duplicated desc "
2318 "desc type %u in "
2319 "FIP VN2VN subtype %u\n",
2320 dtype, sub);
2321 return -EINVAL;
2322 }
2323 desc_mask &= ~BIT(dtype);
2324 }
2325
2326 switch (dtype) {
2327 case FIP_DT_MAC:
2328 if (dlen != sizeof(struct fip_mac_desc))
2329 goto len_err;
2330 macd = (struct fip_mac_desc *)desc;
2331 if (!is_valid_ether_addr(macd->fd_mac)) {
2332 LIBFCOE_FIP_DBG(fip,
2333 "Invalid MAC addr %pM in FIP VN2VN\n",
2334 macd->fd_mac);
2335 return -EINVAL;
2336 }
2337 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2338 break;
2339 case FIP_DT_NAME:
2340 if (dlen != sizeof(struct fip_wwn_desc))
2341 goto len_err;
2342 wwn = (struct fip_wwn_desc *)desc;
2343 frport->rdata.ids.node_name =
2344 get_unaligned_be64(&wwn->fd_wwn);
2345 break;
2346 case FIP_DT_VN_ID:
2347 if (dlen != sizeof(struct fip_vn_desc))
2348 goto len_err;
2349 vn = (struct fip_vn_desc *)desc;
2350 memcpy(frport->vn_mac, vn->fd_mac, ETH_ALEN);
2351 frport->rdata.ids.port_id = ntoh24(vn->fd_fc_id);
2352 frport->rdata.ids.port_name =
2353 get_unaligned_be64(&vn->fd_wwpn);
2354 break;
2355 case FIP_DT_FC4F:
2356 if (dlen != sizeof(struct fip_fc4_feat))
2357 goto len_err;
2358 break;
2359 case FIP_DT_FCOE_SIZE:
2360 if (dlen != sizeof(struct fip_size_desc))
2361 goto len_err;
2362 size = (struct fip_size_desc *)desc;
2363 frport->fcoe_len = ntohs(size->fd_size);
2364 break;
2365 default:
2366 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2367 "in FIP probe\n", dtype);
2368 /* standard says ignore unknown descriptors >= 128 */
2369 if (dtype < FIP_DT_NON_CRITICAL)
2370 return -EINVAL;
2371 break;
2372 }
2373 desc = (struct fip_desc *)((char *)desc + dlen);
2374 rlen -= dlen;
2375 }
2376 return 0;
2377
2378len_err:
2379 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2380 dtype, dlen);
2381 return -EINVAL;
2382}
2383
2384/**
2385 * fcoe_ctlr_vn_send_claim() - send multicast FIP VN2VN Claim Notification.
2386 * @fip: The FCoE controller
2387 *
2388 * Called with ctlr_mutex held.
2389 */
2390static void fcoe_ctlr_vn_send_claim(struct fcoe_ctlr *fip)
2391{
2392 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_NOTIFY, fcoe_all_vn2vn, 0);
2393 fip->sol_time = jiffies;
2394}
2395
2396/**
2397 * fcoe_ctlr_vn_probe_req() - handle incoming VN2VN probe request.
2398 * @fip: The FCoE controller
2399 * @frport: parsed FCoE rport from the probe request
2400 *
2401 * Called with ctlr_mutex held.
2402 */
2403static void fcoe_ctlr_vn_probe_req(struct fcoe_ctlr *fip,
2404 struct fcoe_rport *frport)
2405{
2406 if (frport->rdata.ids.port_id != fip->port_id)
2407 return;
2408
2409 switch (fip->state) {
2410 case FIP_ST_VNMP_CLAIM:
2411 case FIP_ST_VNMP_UP:
2412 LIBFCOE_FIP_DBG(fip, "vn_probe_req: send reply, state %x\n",
2413 fip->state);
2414 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2415 frport->enode_mac, 0);
2416 break;
2417 case FIP_ST_VNMP_PROBE1:
2418 case FIP_ST_VNMP_PROBE2:
2419 /*
2420 * Decide whether to reply to the Probe.
2421 * Our selected address is never a "recorded" one, so
2422 * only reply if our WWPN is greater and the
2423 * Probe's REC bit is not set.
2424 * If we don't reply, we will change our address.
2425 */
2426 if (fip->lp->wwpn > frport->rdata.ids.port_name &&
2427 !(frport->flags & FIP_FL_REC_OR_P2P)) {
2428 LIBFCOE_FIP_DBG(fip, "vn_probe_req: "
2429 "port_id collision\n");
2430 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REP,
2431 frport->enode_mac, 0);
2432 break;
2433 }
2434 fallthrough;
2435 case FIP_ST_VNMP_START:
2436 LIBFCOE_FIP_DBG(fip, "vn_probe_req: "
2437 "restart VN2VN negotiation\n");
2438 fcoe_ctlr_vn_restart(fip);
2439 break;
2440 default:
2441 LIBFCOE_FIP_DBG(fip, "vn_probe_req: ignore state %x\n",
2442 fip->state);
2443 break;
2444 }
2445}
2446
2447/**
2448 * fcoe_ctlr_vn_probe_reply() - handle incoming VN2VN probe reply.
2449 * @fip: The FCoE controller
2450 * @frport: parsed FCoE rport from the probe request
2451 *
2452 * Called with ctlr_mutex held.
2453 */
2454static void fcoe_ctlr_vn_probe_reply(struct fcoe_ctlr *fip,
2455 struct fcoe_rport *frport)
2456{
2457 if (frport->rdata.ids.port_id != fip->port_id)
2458 return;
2459 switch (fip->state) {
2460 case FIP_ST_VNMP_START:
2461 case FIP_ST_VNMP_PROBE1:
2462 case FIP_ST_VNMP_PROBE2:
2463 case FIP_ST_VNMP_CLAIM:
2464 LIBFCOE_FIP_DBG(fip, "vn_probe_reply: restart state %x\n",
2465 fip->state);
2466 fcoe_ctlr_vn_restart(fip);
2467 break;
2468 case FIP_ST_VNMP_UP:
2469 LIBFCOE_FIP_DBG(fip, "vn_probe_reply: send claim notify\n");
2470 fcoe_ctlr_vn_send_claim(fip);
2471 break;
2472 default:
2473 break;
2474 }
2475}
2476
2477/**
2478 * fcoe_ctlr_vn_add() - Add a VN2VN entry to the list, based on a claim reply.
2479 * @fip: The FCoE controller
2480 * @new: newly-parsed FCoE rport as a template for new rdata
2481 *
2482 * Called with ctlr_mutex held.
2483 */
2484static void fcoe_ctlr_vn_add(struct fcoe_ctlr *fip, struct fcoe_rport *new)
2485{
2486 struct fc_lport *lport = fip->lp;
2487 struct fc_rport_priv *rdata;
2488 struct fc_rport_identifiers *ids;
2489 struct fcoe_rport *frport;
2490 u32 port_id;
2491
2492 port_id = new->rdata.ids.port_id;
2493 if (port_id == fip->port_id)
2494 return;
2495
2496 mutex_lock(&lport->disc.disc_mutex);
2497 rdata = fc_rport_create(lport, port_id);
2498 if (!rdata) {
2499 mutex_unlock(&lport->disc.disc_mutex);
2500 return;
2501 }
2502 mutex_lock(&rdata->rp_mutex);
2503 mutex_unlock(&lport->disc.disc_mutex);
2504
2505 rdata->ops = &fcoe_ctlr_vn_rport_ops;
2506 rdata->disc_id = lport->disc.disc_id;
2507
2508 ids = &rdata->ids;
2509 if ((ids->port_name != -1 &&
2510 ids->port_name != new->rdata.ids.port_name) ||
2511 (ids->node_name != -1 &&
2512 ids->node_name != new->rdata.ids.node_name)) {
2513 mutex_unlock(&rdata->rp_mutex);
2514 LIBFCOE_FIP_DBG(fip, "vn_add rport logoff %6.6x\n", port_id);
2515 fc_rport_logoff(rdata);
2516 mutex_lock(&rdata->rp_mutex);
2517 }
2518 ids->port_name = new->rdata.ids.port_name;
2519 ids->node_name = new->rdata.ids.node_name;
2520 mutex_unlock(&rdata->rp_mutex);
2521
2522 frport = fcoe_ctlr_rport(rdata);
2523 LIBFCOE_FIP_DBG(fip, "vn_add rport %6.6x %s state %d\n",
2524 port_id, frport->fcoe_len ? "old" : "new",
2525 rdata->rp_state);
2526 frport->fcoe_len = new->fcoe_len;
2527 frport->flags = new->flags;
2528 frport->login_count = new->login_count;
2529 memcpy(frport->enode_mac, new->enode_mac, ETH_ALEN);
2530 memcpy(frport->vn_mac, new->vn_mac, ETH_ALEN);
2531 frport->time = 0;
2532}
2533
2534/**
2535 * fcoe_ctlr_vn_lookup() - Find VN remote port's MAC address
2536 * @fip: The FCoE controller
2537 * @port_id: The port_id of the remote VN_node
2538 * @mac: buffer which will hold the VN_NODE destination MAC address, if found.
2539 *
2540 * Returns non-zero error if no remote port found.
2541 */
2542static int fcoe_ctlr_vn_lookup(struct fcoe_ctlr *fip, u32 port_id, u8 *mac)
2543{
2544 struct fc_lport *lport = fip->lp;
2545 struct fc_rport_priv *rdata;
2546 struct fcoe_rport *frport;
2547 int ret = -1;
2548
2549 rdata = fc_rport_lookup(lport, port_id);
2550 if (rdata) {
2551 frport = fcoe_ctlr_rport(rdata);
2552 memcpy(mac, frport->enode_mac, ETH_ALEN);
2553 ret = 0;
2554 kref_put(&rdata->kref, fc_rport_destroy);
2555 }
2556 return ret;
2557}
2558
2559/**
2560 * fcoe_ctlr_vn_claim_notify() - handle received FIP VN2VN Claim Notification
2561 * @fip: The FCoE controller
2562 * @new: newly-parsed FCoE rport as a template for new rdata
2563 *
2564 * Called with ctlr_mutex held.
2565 */
2566static void fcoe_ctlr_vn_claim_notify(struct fcoe_ctlr *fip,
2567 struct fcoe_rport *new)
2568{
2569 if (new->flags & FIP_FL_REC_OR_P2P) {
2570 LIBFCOE_FIP_DBG(fip, "send probe req for P2P/REC\n");
2571 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2572 return;
2573 }
2574 switch (fip->state) {
2575 case FIP_ST_VNMP_START:
2576 case FIP_ST_VNMP_PROBE1:
2577 case FIP_ST_VNMP_PROBE2:
2578 if (new->rdata.ids.port_id == fip->port_id) {
2579 LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
2580 "restart, state %d\n",
2581 fip->state);
2582 fcoe_ctlr_vn_restart(fip);
2583 }
2584 break;
2585 case FIP_ST_VNMP_CLAIM:
2586 case FIP_ST_VNMP_UP:
2587 if (new->rdata.ids.port_id == fip->port_id) {
2588 if (new->rdata.ids.port_name > fip->lp->wwpn) {
2589 LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
2590 "restart, port_id collision\n");
2591 fcoe_ctlr_vn_restart(fip);
2592 break;
2593 }
2594 LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
2595 "send claim notify\n");
2596 fcoe_ctlr_vn_send_claim(fip);
2597 break;
2598 }
2599 LIBFCOE_FIP_DBG(fip, "vn_claim_notify: send reply to %x\n",
2600 new->rdata.ids.port_id);
2601 fcoe_ctlr_vn_send(fip, FIP_SC_VN_CLAIM_REP, new->enode_mac,
2602 min((u32)new->fcoe_len,
2603 fcoe_ctlr_fcoe_size(fip)));
2604 fcoe_ctlr_vn_add(fip, new);
2605 break;
2606 default:
2607 LIBFCOE_FIP_DBG(fip, "vn_claim_notify: "
2608 "ignoring claim from %x\n",
2609 new->rdata.ids.port_id);
2610 break;
2611 }
2612}
2613
2614/**
2615 * fcoe_ctlr_vn_claim_resp() - handle received Claim Response
2616 * @fip: The FCoE controller that received the frame
2617 * @new: newly-parsed FCoE rport from the Claim Response
2618 *
2619 * Called with ctlr_mutex held.
2620 */
2621static void fcoe_ctlr_vn_claim_resp(struct fcoe_ctlr *fip,
2622 struct fcoe_rport *new)
2623{
2624 LIBFCOE_FIP_DBG(fip, "claim resp from from rport %x - state %s\n",
2625 new->rdata.ids.port_id, fcoe_ctlr_state(fip->state));
2626 if (fip->state == FIP_ST_VNMP_UP || fip->state == FIP_ST_VNMP_CLAIM)
2627 fcoe_ctlr_vn_add(fip, new);
2628}
2629
2630/**
2631 * fcoe_ctlr_vn_beacon() - handle received beacon.
2632 * @fip: The FCoE controller that received the frame
2633 * @new: newly-parsed FCoE rport from the Beacon
2634 *
2635 * Called with ctlr_mutex held.
2636 */
2637static void fcoe_ctlr_vn_beacon(struct fcoe_ctlr *fip,
2638 struct fcoe_rport *new)
2639{
2640 struct fc_lport *lport = fip->lp;
2641 struct fc_rport_priv *rdata;
2642 struct fcoe_rport *frport;
2643
2644 if (new->flags & FIP_FL_REC_OR_P2P) {
2645 LIBFCOE_FIP_DBG(fip, "p2p beacon while in vn2vn mode\n");
2646 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
2647 return;
2648 }
2649 rdata = fc_rport_lookup(lport, new->rdata.ids.port_id);
2650 if (rdata) {
2651 if (rdata->ids.node_name == new->rdata.ids.node_name &&
2652 rdata->ids.port_name == new->rdata.ids.port_name) {
2653 frport = fcoe_ctlr_rport(rdata);
2654
2655 LIBFCOE_FIP_DBG(fip, "beacon from rport %x\n",
2656 rdata->ids.port_id);
2657 if (!frport->time && fip->state == FIP_ST_VNMP_UP) {
2658 LIBFCOE_FIP_DBG(fip, "beacon expired "
2659 "for rport %x\n",
2660 rdata->ids.port_id);
2661 fc_rport_login(rdata);
2662 }
2663 frport->time = jiffies;
2664 }
2665 kref_put(&rdata->kref, fc_rport_destroy);
2666 return;
2667 }
2668 if (fip->state != FIP_ST_VNMP_UP)
2669 return;
2670
2671 /*
2672 * Beacon from a new neighbor.
2673 * Send a claim notify if one hasn't been sent recently.
2674 * Don't add the neighbor yet.
2675 */
2676 LIBFCOE_FIP_DBG(fip, "beacon from new rport %x. sending claim notify\n",
2677 new->rdata.ids.port_id);
2678 if (time_after(jiffies,
2679 fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT)))
2680 fcoe_ctlr_vn_send_claim(fip);
2681}
2682
2683/**
2684 * fcoe_ctlr_vn_age() - Check for VN_ports without recent beacons
2685 * @fip: The FCoE controller
2686 *
2687 * Called with ctlr_mutex held.
2688 * Called only in state FIP_ST_VNMP_UP.
2689 * Returns the soonest time for next age-out or a time far in the future.
2690 */
2691static unsigned long fcoe_ctlr_vn_age(struct fcoe_ctlr *fip)
2692{
2693 struct fc_lport *lport = fip->lp;
2694 struct fc_rport_priv *rdata;
2695 struct fcoe_rport *frport;
2696 unsigned long next_time;
2697 unsigned long deadline;
2698
2699 next_time = jiffies + msecs_to_jiffies(FIP_VN_BEACON_INT * 10);
2700 mutex_lock(&lport->disc.disc_mutex);
2701 list_for_each_entry_rcu(rdata, &lport->disc.rports, peers) {
2702 if (!kref_get_unless_zero(&rdata->kref))
2703 continue;
2704 frport = fcoe_ctlr_rport(rdata);
2705 if (!frport->time) {
2706 kref_put(&rdata->kref, fc_rport_destroy);
2707 continue;
2708 }
2709 deadline = frport->time +
2710 msecs_to_jiffies(FIP_VN_BEACON_INT * 25 / 10);
2711 if (time_after_eq(jiffies, deadline)) {
2712 frport->time = 0;
2713 LIBFCOE_FIP_DBG(fip,
2714 "port %16.16llx fc_id %6.6x beacon expired\n",
2715 rdata->ids.port_name, rdata->ids.port_id);
2716 fc_rport_logoff(rdata);
2717 } else if (time_before(deadline, next_time))
2718 next_time = deadline;
2719 kref_put(&rdata->kref, fc_rport_destroy);
2720 }
2721 mutex_unlock(&lport->disc.disc_mutex);
2722 return next_time;
2723}
2724
2725/**
2726 * fcoe_ctlr_vn_recv() - Receive a FIP frame
2727 * @fip: The FCoE controller that received the frame
2728 * @skb: The received FIP frame
2729 *
2730 * Returns non-zero if the frame is dropped.
2731 * Always consumes the frame.
2732 */
2733static int fcoe_ctlr_vn_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2734{
2735 struct fip_header *fiph;
2736 enum fip_vn2vn_subcode sub;
2737 struct fcoe_rport frport = { };
2738 int rc, vlan_id = 0;
2739
2740 fiph = (struct fip_header *)skb->data;
2741 sub = fiph->fip_subcode;
2742
2743 if (fip->lp->vlan)
2744 vlan_id = skb_vlan_tag_get_id(skb);
2745
2746 if (vlan_id && vlan_id != fip->lp->vlan) {
2747 LIBFCOE_FIP_DBG(fip, "vn_recv drop frame sub %x vlan %d\n",
2748 sub, vlan_id);
2749 rc = -EAGAIN;
2750 goto drop;
2751 }
2752
2753 rc = fcoe_ctlr_vn_parse(fip, skb, &frport);
2754 if (rc) {
2755 LIBFCOE_FIP_DBG(fip, "vn_recv vn_parse error %d\n", rc);
2756 goto drop;
2757 }
2758
2759 mutex_lock(&fip->ctlr_mutex);
2760 switch (sub) {
2761 case FIP_SC_VN_PROBE_REQ:
2762 fcoe_ctlr_vn_probe_req(fip, &frport);
2763 break;
2764 case FIP_SC_VN_PROBE_REP:
2765 fcoe_ctlr_vn_probe_reply(fip, &frport);
2766 break;
2767 case FIP_SC_VN_CLAIM_NOTIFY:
2768 fcoe_ctlr_vn_claim_notify(fip, &frport);
2769 break;
2770 case FIP_SC_VN_CLAIM_REP:
2771 fcoe_ctlr_vn_claim_resp(fip, &frport);
2772 break;
2773 case FIP_SC_VN_BEACON:
2774 fcoe_ctlr_vn_beacon(fip, &frport);
2775 break;
2776 default:
2777 LIBFCOE_FIP_DBG(fip, "vn_recv unknown subcode %d\n", sub);
2778 rc = -1;
2779 break;
2780 }
2781 mutex_unlock(&fip->ctlr_mutex);
2782drop:
2783 kfree_skb(skb);
2784 return rc;
2785}
2786
2787/**
2788 * fcoe_ctlr_vlan_parse - parse vlan discovery request or response
2789 * @fip: The FCoE controller
2790 * @skb: incoming packet
2791 * @frport: parsed FCoE rport from the probe request
2792 *
2793 * Returns non-zero error number on error.
2794 * Does not consume the packet.
2795 */
2796static int fcoe_ctlr_vlan_parse(struct fcoe_ctlr *fip,
2797 struct sk_buff *skb,
2798 struct fcoe_rport *frport)
2799{
2800 struct fip_header *fiph;
2801 struct fip_desc *desc = NULL;
2802 struct fip_mac_desc *macd = NULL;
2803 struct fip_wwn_desc *wwn = NULL;
2804 size_t rlen;
2805 size_t dlen;
2806 u32 desc_mask = 0;
2807 u32 dtype;
2808 u8 sub;
2809
2810 fiph = (struct fip_header *)skb->data;
2811 frport->flags = ntohs(fiph->fip_flags);
2812
2813 sub = fiph->fip_subcode;
2814 switch (sub) {
2815 case FIP_SC_VL_REQ:
2816 desc_mask = BIT(FIP_DT_MAC) | BIT(FIP_DT_NAME);
2817 break;
2818 default:
2819 LIBFCOE_FIP_DBG(fip, "vn_parse unknown subcode %u\n", sub);
2820 return -EINVAL;
2821 }
2822
2823 rlen = ntohs(fiph->fip_dl_len) * 4;
2824 if (rlen + sizeof(*fiph) > skb->len)
2825 return -EINVAL;
2826
2827 desc = (struct fip_desc *)(fiph + 1);
2828 while (rlen > 0) {
2829 dlen = desc->fip_dlen * FIP_BPW;
2830 if (dlen < sizeof(*desc) || dlen > rlen)
2831 return -EINVAL;
2832
2833 dtype = desc->fip_dtype;
2834 if (dtype < 32) {
2835 if (!(desc_mask & BIT(dtype))) {
2836 LIBFCOE_FIP_DBG(fip,
2837 "unexpected or duplicated desc "
2838 "desc type %u in "
2839 "FIP VN2VN subtype %u\n",
2840 dtype, sub);
2841 return -EINVAL;
2842 }
2843 desc_mask &= ~BIT(dtype);
2844 }
2845
2846 switch (dtype) {
2847 case FIP_DT_MAC:
2848 if (dlen != sizeof(struct fip_mac_desc))
2849 goto len_err;
2850 macd = (struct fip_mac_desc *)desc;
2851 if (!is_valid_ether_addr(macd->fd_mac)) {
2852 LIBFCOE_FIP_DBG(fip,
2853 "Invalid MAC addr %pM in FIP VN2VN\n",
2854 macd->fd_mac);
2855 return -EINVAL;
2856 }
2857 memcpy(frport->enode_mac, macd->fd_mac, ETH_ALEN);
2858 break;
2859 case FIP_DT_NAME:
2860 if (dlen != sizeof(struct fip_wwn_desc))
2861 goto len_err;
2862 wwn = (struct fip_wwn_desc *)desc;
2863 frport->rdata.ids.node_name =
2864 get_unaligned_be64(&wwn->fd_wwn);
2865 break;
2866 default:
2867 LIBFCOE_FIP_DBG(fip, "unexpected descriptor type %x "
2868 "in FIP probe\n", dtype);
2869 /* standard says ignore unknown descriptors >= 128 */
2870 if (dtype < FIP_DT_NON_CRITICAL)
2871 return -EINVAL;
2872 break;
2873 }
2874 desc = (struct fip_desc *)((char *)desc + dlen);
2875 rlen -= dlen;
2876 }
2877 return 0;
2878
2879len_err:
2880 LIBFCOE_FIP_DBG(fip, "FIP length error in descriptor type %x len %zu\n",
2881 dtype, dlen);
2882 return -EINVAL;
2883}
2884
2885/**
2886 * fcoe_ctlr_vlan_send() - Send a FIP VLAN Notification
2887 * @fip: The FCoE controller
2888 * @sub: sub-opcode for vlan notification or vn2vn vlan notification
2889 * @dest: The destination Ethernet MAC address
2890 */
2891static void fcoe_ctlr_vlan_send(struct fcoe_ctlr *fip,
2892 enum fip_vlan_subcode sub,
2893 const u8 *dest)
2894{
2895 struct sk_buff *skb;
2896 struct fip_vlan_notify_frame {
2897 struct ethhdr eth;
2898 struct fip_header fip;
2899 struct fip_mac_desc mac;
2900 struct fip_vlan_desc vlan;
2901 } __packed * frame;
2902 size_t len;
2903 size_t dlen;
2904
2905 len = sizeof(*frame);
2906 dlen = sizeof(frame->mac) + sizeof(frame->vlan);
2907 len = max(len, sizeof(struct ethhdr));
2908
2909 skb = dev_alloc_skb(len);
2910 if (!skb)
2911 return;
2912
2913 LIBFCOE_FIP_DBG(fip, "fip %s vlan notification, vlan %d\n",
2914 fip->mode == FIP_MODE_VN2VN ? "vn2vn" : "fcf",
2915 fip->lp->vlan);
2916
2917 frame = (struct fip_vlan_notify_frame *)skb->data;
2918 memset(frame, 0, len);
2919 memcpy(frame->eth.h_dest, dest, ETH_ALEN);
2920
2921 memcpy(frame->eth.h_source, fip->ctl_src_addr, ETH_ALEN);
2922 frame->eth.h_proto = htons(ETH_P_FIP);
2923
2924 frame->fip.fip_ver = FIP_VER_ENCAPS(FIP_VER);
2925 frame->fip.fip_op = htons(FIP_OP_VLAN);
2926 frame->fip.fip_subcode = sub;
2927 frame->fip.fip_dl_len = htons(dlen / FIP_BPW);
2928
2929 frame->mac.fd_desc.fip_dtype = FIP_DT_MAC;
2930 frame->mac.fd_desc.fip_dlen = sizeof(frame->mac) / FIP_BPW;
2931 memcpy(frame->mac.fd_mac, fip->ctl_src_addr, ETH_ALEN);
2932
2933 frame->vlan.fd_desc.fip_dtype = FIP_DT_VLAN;
2934 frame->vlan.fd_desc.fip_dlen = sizeof(frame->vlan) / FIP_BPW;
2935 put_unaligned_be16(fip->lp->vlan, &frame->vlan.fd_vlan);
2936
2937 skb_put(skb, len);
2938 skb->protocol = htons(ETH_P_FIP);
2939 skb->priority = fip->priority;
2940 skb_reset_mac_header(skb);
2941 skb_reset_network_header(skb);
2942
2943 fip->send(fip, skb);
2944}
2945
2946/**
2947 * fcoe_ctlr_vlan_disc_reply() - send FIP VLAN Discovery Notification.
2948 * @fip: The FCoE controller
2949 * @frport: The newly-parsed FCoE rport from the Discovery Request
2950 *
2951 * Called with ctlr_mutex held.
2952 */
2953static void fcoe_ctlr_vlan_disc_reply(struct fcoe_ctlr *fip,
2954 struct fcoe_rport *frport)
2955{
2956 enum fip_vlan_subcode sub = FIP_SC_VL_NOTE;
2957
2958 if (fip->mode == FIP_MODE_VN2VN)
2959 sub = FIP_SC_VL_VN2VN_NOTE;
2960
2961 fcoe_ctlr_vlan_send(fip, sub, frport->enode_mac);
2962}
2963
2964/**
2965 * fcoe_ctlr_vlan_recv - vlan request receive handler for VN2VN mode.
2966 * @fip: The FCoE controller
2967 * @skb: The received FIP packet
2968 */
2969static int fcoe_ctlr_vlan_recv(struct fcoe_ctlr *fip, struct sk_buff *skb)
2970{
2971 struct fip_header *fiph;
2972 enum fip_vlan_subcode sub;
2973 struct fcoe_rport frport = { };
2974 int rc;
2975
2976 fiph = (struct fip_header *)skb->data;
2977 sub = fiph->fip_subcode;
2978 rc = fcoe_ctlr_vlan_parse(fip, skb, &frport);
2979 if (rc) {
2980 LIBFCOE_FIP_DBG(fip, "vlan_recv vlan_parse error %d\n", rc);
2981 goto drop;
2982 }
2983 mutex_lock(&fip->ctlr_mutex);
2984 if (sub == FIP_SC_VL_REQ)
2985 fcoe_ctlr_vlan_disc_reply(fip, &frport);
2986 mutex_unlock(&fip->ctlr_mutex);
2987
2988drop:
2989 kfree_skb(skb);
2990 return rc;
2991}
2992
2993/**
2994 * fcoe_ctlr_disc_recv - discovery receive handler for VN2VN mode.
2995 * @lport: The local port
2996 * @fp: The received frame
2997 *
2998 * This should never be called since we don't see RSCNs or other
2999 * fabric-generated ELSes.
3000 */
3001static void fcoe_ctlr_disc_recv(struct fc_lport *lport, struct fc_frame *fp)
3002{
3003 struct fc_seq_els_data rjt_data;
3004
3005 rjt_data.reason = ELS_RJT_UNSUP;
3006 rjt_data.explan = ELS_EXPL_NONE;
3007 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
3008 fc_frame_free(fp);
3009}
3010
3011/*
3012 * fcoe_ctlr_disc_start - start discovery for VN2VN mode.
3013 *
3014 * This sets a flag indicating that remote ports should be created
3015 * and started for the peers we discover. We use the disc_callback
3016 * pointer as that flag. Peers already discovered are created here.
3017 *
3018 * The lport lock is held during this call. The callback must be done
3019 * later, without holding either the lport or discovery locks.
3020 * The fcoe_ctlr lock may also be held during this call.
3021 */
3022static void fcoe_ctlr_disc_start(void (*callback)(struct fc_lport *,
3023 enum fc_disc_event),
3024 struct fc_lport *lport)
3025{
3026 struct fc_disc *disc = &lport->disc;
3027 struct fcoe_ctlr *fip = disc->priv;
3028
3029 mutex_lock(&disc->disc_mutex);
3030 disc->disc_callback = callback;
3031 disc->disc_id = (disc->disc_id + 2) | 1;
3032 disc->pending = 1;
3033 schedule_work(&fip->timer_work);
3034 mutex_unlock(&disc->disc_mutex);
3035}
3036
3037/**
3038 * fcoe_ctlr_vn_disc() - report FIP VN_port discovery results after claim state.
3039 * @fip: The FCoE controller
3040 *
3041 * Starts the FLOGI and PLOGI login process to each discovered rport for which
3042 * we've received at least one beacon.
3043 * Performs the discovery complete callback.
3044 */
3045static void fcoe_ctlr_vn_disc(struct fcoe_ctlr *fip)
3046{
3047 struct fc_lport *lport = fip->lp;
3048 struct fc_disc *disc = &lport->disc;
3049 struct fc_rport_priv *rdata;
3050 struct fcoe_rport *frport;
3051 void (*callback)(struct fc_lport *, enum fc_disc_event);
3052
3053 mutex_lock(&disc->disc_mutex);
3054 callback = disc->pending ? disc->disc_callback : NULL;
3055 disc->pending = 0;
3056 list_for_each_entry_rcu(rdata, &disc->rports, peers) {
3057 if (!kref_get_unless_zero(&rdata->kref))
3058 continue;
3059 frport = fcoe_ctlr_rport(rdata);
3060 if (frport->time)
3061 fc_rport_login(rdata);
3062 kref_put(&rdata->kref, fc_rport_destroy);
3063 }
3064 mutex_unlock(&disc->disc_mutex);
3065 if (callback)
3066 callback(lport, DISC_EV_SUCCESS);
3067}
3068
3069/**
3070 * fcoe_ctlr_vn_timeout - timer work function for VN2VN mode.
3071 * @fip: The FCoE controller
3072 */
3073static void fcoe_ctlr_vn_timeout(struct fcoe_ctlr *fip)
3074{
3075 unsigned long next_time;
3076 u8 mac[ETH_ALEN];
3077 u32 new_port_id = 0;
3078
3079 mutex_lock(&fip->ctlr_mutex);
3080 switch (fip->state) {
3081 case FIP_ST_VNMP_START:
3082 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE1);
3083 LIBFCOE_FIP_DBG(fip, "vn_timeout: send 1st probe request\n");
3084 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
3085 next_time = jiffies + msecs_to_jiffies(FIP_VN_PROBE_WAIT);
3086 break;
3087 case FIP_ST_VNMP_PROBE1:
3088 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_PROBE2);
3089 LIBFCOE_FIP_DBG(fip, "vn_timeout: send 2nd probe request\n");
3090 fcoe_ctlr_vn_send(fip, FIP_SC_VN_PROBE_REQ, fcoe_all_vn2vn, 0);
3091 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3092 break;
3093 case FIP_ST_VNMP_PROBE2:
3094 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_CLAIM);
3095 new_port_id = fip->port_id;
3096 hton24(mac, FIP_VN_FC_MAP);
3097 hton24(mac + 3, new_port_id);
3098 fcoe_ctlr_map_dest(fip);
3099 fip->update_mac(fip->lp, mac);
3100 LIBFCOE_FIP_DBG(fip, "vn_timeout: send claim notify\n");
3101 fcoe_ctlr_vn_send_claim(fip);
3102 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3103 break;
3104 case FIP_ST_VNMP_CLAIM:
3105 /*
3106 * This may be invoked either by starting discovery so don't
3107 * go to the next state unless it's been long enough.
3108 */
3109 next_time = fip->sol_time + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3110 if (time_after_eq(jiffies, next_time)) {
3111 fcoe_ctlr_set_state(fip, FIP_ST_VNMP_UP);
3112 LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n");
3113 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
3114 fcoe_all_vn2vn, 0);
3115 next_time = jiffies + msecs_to_jiffies(FIP_VN_ANN_WAIT);
3116 fip->port_ka_time = next_time;
3117 }
3118 fcoe_ctlr_vn_disc(fip);
3119 break;
3120 case FIP_ST_VNMP_UP:
3121 next_time = fcoe_ctlr_vn_age(fip);
3122 if (time_after_eq(jiffies, fip->port_ka_time)) {
3123 LIBFCOE_FIP_DBG(fip, "vn_timeout: send vn2vn beacon\n");
3124 fcoe_ctlr_vn_send(fip, FIP_SC_VN_BEACON,
3125 fcoe_all_vn2vn, 0);
3126 fip->port_ka_time = jiffies +
3127 msecs_to_jiffies(FIP_VN_BEACON_INT +
3128 get_random_u32_below(FIP_VN_BEACON_FUZZ));
3129 }
3130 if (time_before(fip->port_ka_time, next_time))
3131 next_time = fip->port_ka_time;
3132 break;
3133 case FIP_ST_LINK_WAIT:
3134 goto unlock;
3135 default:
3136 WARN(1, "unexpected state %d\n", fip->state);
3137 goto unlock;
3138 }
3139 mod_timer(&fip->timer, next_time);
3140unlock:
3141 mutex_unlock(&fip->ctlr_mutex);
3142
3143 /* If port ID is new, notify local port after dropping ctlr_mutex */
3144 if (new_port_id)
3145 fc_lport_set_local_id(fip->lp, new_port_id);
3146}
3147
3148/**
3149 * fcoe_ctlr_mode_set() - Set or reset the ctlr's mode
3150 * @lport: The local port to be (re)configured
3151 * @fip: The FCoE controller whose mode is changing
3152 * @fip_mode: The new fip mode
3153 *
3154 * Note that the we shouldn't be changing the libfc discovery settings
3155 * (fc_disc_config) while an lport is going through the libfc state
3156 * machine. The mode can only be changed when a fcoe_ctlr device is
3157 * disabled, so that should ensure that this routine is only called
3158 * when nothing is happening.
3159 */
3160static void fcoe_ctlr_mode_set(struct fc_lport *lport, struct fcoe_ctlr *fip,
3161 enum fip_mode fip_mode)
3162{
3163 void *priv;
3164
3165 WARN_ON(lport->state != LPORT_ST_RESET &&
3166 lport->state != LPORT_ST_DISABLED);
3167
3168 if (fip_mode == FIP_MODE_VN2VN) {
3169 lport->rport_priv_size = sizeof(struct fcoe_rport);
3170 lport->point_to_multipoint = 1;
3171 lport->tt.disc_recv_req = fcoe_ctlr_disc_recv;
3172 lport->tt.disc_start = fcoe_ctlr_disc_start;
3173 lport->tt.disc_stop = fcoe_ctlr_disc_stop;
3174 lport->tt.disc_stop_final = fcoe_ctlr_disc_stop_final;
3175 priv = fip;
3176 } else {
3177 lport->rport_priv_size = 0;
3178 lport->point_to_multipoint = 0;
3179 lport->tt.disc_recv_req = NULL;
3180 lport->tt.disc_start = NULL;
3181 lport->tt.disc_stop = NULL;
3182 lport->tt.disc_stop_final = NULL;
3183 priv = lport;
3184 }
3185
3186 fc_disc_config(lport, priv);
3187}
3188
3189/**
3190 * fcoe_libfc_config() - Sets up libfc related properties for local port
3191 * @lport: The local port to configure libfc for
3192 * @fip: The FCoE controller in use by the local port
3193 * @tt: The libfc function template
3194 * @init_fcp: If non-zero, the FCP portion of libfc should be initialized
3195 *
3196 * Returns : 0 for success
3197 */
3198int fcoe_libfc_config(struct fc_lport *lport, struct fcoe_ctlr *fip,
3199 const struct libfc_function_template *tt, int init_fcp)
3200{
3201 /* Set the function pointers set by the LLDD */
3202 memcpy(&lport->tt, tt, sizeof(*tt));
3203 if (init_fcp && fc_fcp_init(lport))
3204 return -ENOMEM;
3205 fc_exch_init(lport);
3206 fc_elsct_init(lport);
3207 fc_lport_init(lport);
3208 fc_disc_init(lport);
3209 fcoe_ctlr_mode_set(lport, fip, fip->mode);
3210 return 0;
3211}
3212EXPORT_SYMBOL_GPL(fcoe_libfc_config);
3213
3214void fcoe_fcf_get_selected(struct fcoe_fcf_device *fcf_dev)
3215{
3216 struct fcoe_ctlr_device *ctlr_dev = fcoe_fcf_dev_to_ctlr_dev(fcf_dev);
3217 struct fcoe_ctlr *fip = fcoe_ctlr_device_priv(ctlr_dev);
3218 struct fcoe_fcf *fcf;
3219
3220 mutex_lock(&fip->ctlr_mutex);
3221 mutex_lock(&ctlr_dev->lock);
3222
3223 fcf = fcoe_fcf_device_priv(fcf_dev);
3224 if (fcf)
3225 fcf_dev->selected = (fcf == fip->sel_fcf) ? 1 : 0;
3226 else
3227 fcf_dev->selected = 0;
3228
3229 mutex_unlock(&ctlr_dev->lock);
3230 mutex_unlock(&fip->ctlr_mutex);
3231}
3232EXPORT_SYMBOL(fcoe_fcf_get_selected);
3233
3234void fcoe_ctlr_set_fip_mode(struct fcoe_ctlr_device *ctlr_dev)
3235{
3236 struct fcoe_ctlr *ctlr = fcoe_ctlr_device_priv(ctlr_dev);
3237 struct fc_lport *lport = ctlr->lp;
3238
3239 mutex_lock(&ctlr->ctlr_mutex);
3240 switch (ctlr_dev->mode) {
3241 case FIP_CONN_TYPE_VN2VN:
3242 ctlr->mode = FIP_MODE_VN2VN;
3243 break;
3244 case FIP_CONN_TYPE_FABRIC:
3245 default:
3246 ctlr->mode = FIP_MODE_FABRIC;
3247 break;
3248 }
3249
3250 mutex_unlock(&ctlr->ctlr_mutex);
3251
3252 fcoe_ctlr_mode_set(lport, ctlr, ctlr->mode);
3253}
3254EXPORT_SYMBOL(fcoe_ctlr_set_fip_mode);