2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
28 * The lport, disc and rport blocks all have mutexes that are used to protect
29 * those objects. The main motivation for these locks is to prevent from
30 * having an lport reset just before we send a frame. In that scenario the
31 * lport's FID would get set to zero and then we'd send a frame with an
32 * invalid SID. We also need to ensure that states don't change unexpectedly
33 * while processing another state.
37 * The following hierarchy defines the locking rules. A greater lock
38 * may be held before acquiring a lesser lock, but a lesser lock should never
39 * be held while attempting to acquire a greater lock. Here is the hierarchy-
41 * lport > disc, lport > rport, disc > rport
45 * The callbacks cause complications with this scheme. There is a callback
46 * from the rport (to either lport or disc) and a callback from disc
49 * As rports exit the rport state machine a callback is made to the owner of
50 * the rport to notify success or failure. Since the callback is likely to
51 * cause the lport or disc to grab its lock we cannot hold the rport lock
52 * while making the callback. To ensure that the rport is not free'd while
53 * processing the callback the rport callbacks are serialized through a
54 * single-threaded workqueue. An rport would never be free'd while in a
55 * callback handler because no other rport work in this queue can be executed
58 * When discovery succeeds or fails a callback is made to the lport as
59 * notification. Currently, successful discovery causes the lport to take no
60 * action. A failure will cause the lport to reset. There is likely a circular
61 * locking problem with this implementation.
67 * The critical sections protected by the lport's mutex are quite broad and
68 * may be improved upon in the future. The lport code and its locking doesn't
69 * influence the I/O path, so excessive locking doesn't penalize I/O
72 * The strategy is to lock whenever processing a request or response. Note
73 * that every _enter_* function corresponds to a state change. They generally
74 * change the lports state and then send a request out on the wire. We lock
75 * before calling any of these functions to protect that state change. This
76 * means that the entry points into the lport block manage the locks while
77 * the state machine can transition between states (i.e. _enter_* functions)
78 * while always staying protected.
80 * When handling responses we also hold the lport mutex broadly. When the
81 * lport receives the response frame it locks the mutex and then calls the
82 * appropriate handler for the particuar response. Generally a response will
83 * trigger a state change and so the lock must already be held.
85 * Retries also have to consider the locking. The retries occur from a work
86 * context and the work function will lock the lport and then retry the state
87 * (i.e. _enter_* function).
90 #include <linux/timer.h>
91 #include <linux/delay.h>
92 #include <linux/module.h>
93 #include <linux/slab.h>
94 #include <asm/unaligned.h>
96 #include <scsi/fc/fc_gs.h>
98 #include <scsi/libfc.h>
99 #include <scsi/fc_encode.h>
100 #include <linux/scatterlist.h>
102 #include "fc_libfc.h"
104 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
105 #define FC_LOCAL_PTP_FID_LO 0x010101
106 #define FC_LOCAL_PTP_FID_HI 0x010102
108 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
110 static void fc_lport_error(struct fc_lport *, struct fc_frame *);
112 static void fc_lport_enter_reset(struct fc_lport *);
113 static void fc_lport_enter_flogi(struct fc_lport *);
114 static void fc_lport_enter_dns(struct fc_lport *);
115 static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
116 static void fc_lport_enter_scr(struct fc_lport *);
117 static void fc_lport_enter_ready(struct fc_lport *);
118 static void fc_lport_enter_logo(struct fc_lport *);
119 static void fc_lport_enter_fdmi(struct fc_lport *lport);
120 static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state);
122 static const char *fc_lport_state_names[] = {
123 [LPORT_ST_DISABLED] = "disabled",
124 [LPORT_ST_FLOGI] = "FLOGI",
125 [LPORT_ST_DNS] = "dNS",
126 [LPORT_ST_RNN_ID] = "RNN_ID",
127 [LPORT_ST_RSNN_NN] = "RSNN_NN",
128 [LPORT_ST_RSPN_ID] = "RSPN_ID",
129 [LPORT_ST_RFT_ID] = "RFT_ID",
130 [LPORT_ST_RFF_ID] = "RFF_ID",
131 [LPORT_ST_FDMI] = "FDMI",
132 [LPORT_ST_RHBA] = "RHBA",
133 [LPORT_ST_RPA] = "RPA",
134 [LPORT_ST_DHBA] = "DHBA",
135 [LPORT_ST_DPRT] = "DPRT",
136 [LPORT_ST_SCR] = "SCR",
137 [LPORT_ST_READY] = "Ready",
138 [LPORT_ST_LOGO] = "LOGO",
139 [LPORT_ST_RESET] = "reset",
143 * struct fc_bsg_info - FC Passthrough managemet structure
144 * @job: The passthrough job
145 * @lport: The local port to pass through a command
146 * @rsp_code: The expected response code
147 * @sg: job->reply_payload.sg_list
148 * @nents: job->reply_payload.sg_cnt
149 * @offset: The offset into the response data
153 struct fc_lport *lport;
155 struct scatterlist *sg;
161 * fc_frame_drop() - Dummy frame handler
162 * @lport: The local port the frame was received on
163 * @fp: The received frame
165 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
172 * fc_lport_rport_callback() - Event handler for rport events
173 * @lport: The lport which is receiving the event
174 * @rdata: private remote port data
175 * @event: The event that occurred
177 * Locking Note: The rport lock should not be held when calling
180 static void fc_lport_rport_callback(struct fc_lport *lport,
181 struct fc_rport_priv *rdata,
182 enum fc_rport_event event)
184 FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
187 mutex_lock(&lport->lp_mutex);
190 if (lport->state == LPORT_ST_DNS) {
191 lport->dns_rdata = rdata;
192 fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
193 } else if (lport->state == LPORT_ST_FDMI) {
194 lport->ms_rdata = rdata;
195 fc_lport_enter_ms(lport, LPORT_ST_DHBA);
197 FC_LPORT_DBG(lport, "Received an READY event "
198 "on port (%6.6x) for the directory "
199 "server, but the lport is not "
200 "in the DNS or FDMI state, it's in the "
201 "%d state", rdata->ids.port_id,
203 fc_rport_logoff(rdata);
207 case RPORT_EV_FAILED:
209 if (rdata->ids.port_id == FC_FID_DIR_SERV)
210 lport->dns_rdata = NULL;
211 else if (rdata->ids.port_id == FC_FID_MGMT_SERV)
212 lport->ms_rdata = NULL;
217 mutex_unlock(&lport->lp_mutex);
221 * fc_lport_state() - Return a string which represents the lport's state
222 * @lport: The lport whose state is to converted to a string
224 static const char *fc_lport_state(struct fc_lport *lport)
228 cp = fc_lport_state_names[lport->state];
235 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
236 * @lport: The lport to attach the ptp rport to
237 * @remote_fid: The FID of the ptp rport
238 * @remote_wwpn: The WWPN of the ptp rport
239 * @remote_wwnn: The WWNN of the ptp rport
241 static void fc_lport_ptp_setup(struct fc_lport *lport,
242 u32 remote_fid, u64 remote_wwpn,
245 lockdep_assert_held(&lport->lp_mutex);
247 if (lport->ptp_rdata) {
248 fc_rport_logoff(lport->ptp_rdata);
249 kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
251 mutex_lock(&lport->disc.disc_mutex);
252 lport->ptp_rdata = fc_rport_create(lport, remote_fid);
253 if (!lport->ptp_rdata) {
254 printk(KERN_WARNING "libfc: Failed to setup lport 0x%x\n",
256 mutex_unlock(&lport->disc.disc_mutex);
259 kref_get(&lport->ptp_rdata->kref);
260 lport->ptp_rdata->ids.port_name = remote_wwpn;
261 lport->ptp_rdata->ids.node_name = remote_wwnn;
262 mutex_unlock(&lport->disc.disc_mutex);
264 fc_rport_login(lport->ptp_rdata);
266 fc_lport_enter_ready(lport);
270 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
271 * @shost: The SCSI host whose port state is to be determined
273 void fc_get_host_port_state(struct Scsi_Host *shost)
275 struct fc_lport *lport = shost_priv(shost);
277 mutex_lock(&lport->lp_mutex);
279 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
281 switch (lport->state) {
283 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
286 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
288 mutex_unlock(&lport->lp_mutex);
290 EXPORT_SYMBOL(fc_get_host_port_state);
293 * fc_get_host_speed() - Return the speed of the given Scsi_Host
294 * @shost: The SCSI host whose port speed is to be determined
296 void fc_get_host_speed(struct Scsi_Host *shost)
298 struct fc_lport *lport = shost_priv(shost);
300 fc_host_speed(shost) = lport->link_speed;
302 EXPORT_SYMBOL(fc_get_host_speed);
305 * fc_get_host_stats() - Return the Scsi_Host's statistics
306 * @shost: The SCSI host whose statistics are to be returned
308 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
310 struct fc_host_statistics *fc_stats;
311 struct fc_lport *lport = shost_priv(shost);
313 u64 fcp_in_bytes = 0;
314 u64 fcp_out_bytes = 0;
316 fc_stats = &lport->host_stats;
317 memset(fc_stats, 0, sizeof(struct fc_host_statistics));
319 fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ;
321 for_each_possible_cpu(cpu) {
322 struct fc_stats *stats;
324 stats = per_cpu_ptr(lport->stats, cpu);
326 fc_stats->tx_frames += stats->TxFrames;
327 fc_stats->tx_words += stats->TxWords;
328 fc_stats->rx_frames += stats->RxFrames;
329 fc_stats->rx_words += stats->RxWords;
330 fc_stats->error_frames += stats->ErrorFrames;
331 fc_stats->invalid_crc_count += stats->InvalidCRCCount;
332 fc_stats->fcp_input_requests += stats->InputRequests;
333 fc_stats->fcp_output_requests += stats->OutputRequests;
334 fc_stats->fcp_control_requests += stats->ControlRequests;
335 fcp_in_bytes += stats->InputBytes;
336 fcp_out_bytes += stats->OutputBytes;
337 fc_stats->fcp_packet_alloc_failures += stats->FcpPktAllocFails;
338 fc_stats->fcp_packet_aborts += stats->FcpPktAborts;
339 fc_stats->fcp_frame_alloc_failures += stats->FcpFrameAllocFails;
340 fc_stats->link_failure_count += stats->LinkFailureCount;
342 fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
343 fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
344 fc_stats->lip_count = -1;
345 fc_stats->nos_count = -1;
346 fc_stats->loss_of_sync_count = -1;
347 fc_stats->loss_of_signal_count = -1;
348 fc_stats->prim_seq_protocol_err_count = -1;
349 fc_stats->dumped_frames = -1;
351 /* update exches stats */
352 fc_exch_update_stats(lport);
356 EXPORT_SYMBOL(fc_get_host_stats);
359 * fc_lport_flogi_fill() - Fill in FLOGI command for request
360 * @lport: The local port the FLOGI is for
361 * @flogi: The FLOGI command
364 static void fc_lport_flogi_fill(struct fc_lport *lport,
365 struct fc_els_flogi *flogi,
368 struct fc_els_csp *sp;
369 struct fc_els_cssp *cp;
371 memset(flogi, 0, sizeof(*flogi));
372 flogi->fl_cmd = (u8) op;
373 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
374 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
376 sp->sp_hi_ver = 0x20;
377 sp->sp_lo_ver = 0x20;
378 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
379 sp->sp_bb_data = htons((u16) lport->mfs);
380 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
381 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
382 if (op != ELS_FLOGI) {
383 sp->sp_features = htons(FC_SP_FT_CIRO);
384 sp->sp_tot_seq = htons(255); /* seq. we accept */
385 sp->sp_rel_off = htons(0x1f);
386 sp->sp_e_d_tov = htonl(lport->e_d_tov);
388 cp->cp_rdfs = htons((u16) lport->mfs);
389 cp->cp_con_seq = htons(255);
395 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
396 * @lport: The local port to add a new FC-4 type to
397 * @type: The new FC-4 type
399 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
403 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
404 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
408 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
409 * @lport: Fibre Channel local port receiving the RLIR
410 * @fp: The RLIR request frame
412 static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
414 lockdep_assert_held(&lport->lp_mutex);
416 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
417 fc_lport_state(lport));
419 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
424 * fc_lport_recv_echo_req() - Handle received ECHO request
425 * @lport: The local port receiving the ECHO
426 * @fp: ECHO request frame
428 static void fc_lport_recv_echo_req(struct fc_lport *lport,
429 struct fc_frame *in_fp)
436 lockdep_assert_held(&lport->lp_mutex);
438 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
439 fc_lport_state(lport));
441 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
442 pp = fc_frame_payload_get(in_fp, len);
444 if (len < sizeof(__be32))
445 len = sizeof(__be32);
447 fp = fc_frame_alloc(lport, len);
449 dp = fc_frame_payload_get(fp, len);
451 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
452 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
453 lport->tt.frame_send(lport, fp);
455 fc_frame_free(in_fp);
459 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
460 * @lport: The local port receiving the RNID
461 * @fp: The RNID request frame
463 static void fc_lport_recv_rnid_req(struct fc_lport *lport,
464 struct fc_frame *in_fp)
467 struct fc_els_rnid *req;
469 struct fc_els_rnid_resp rnid;
470 struct fc_els_rnid_cid cid;
471 struct fc_els_rnid_gen gen;
473 struct fc_seq_els_data rjt_data;
477 lockdep_assert_held(&lport->lp_mutex);
479 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
480 fc_lport_state(lport));
482 req = fc_frame_payload_get(in_fp, sizeof(*req));
484 rjt_data.reason = ELS_RJT_LOGIC;
485 rjt_data.explan = ELS_EXPL_NONE;
486 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
490 if (fmt != ELS_RNIDF_GEN ||
491 ntohl(lport->rnid_gen.rnid_atype) == 0) {
492 fmt = ELS_RNIDF_NONE; /* nothing to provide */
493 len -= sizeof(rp->gen);
495 fp = fc_frame_alloc(lport, len);
497 rp = fc_frame_payload_get(fp, len);
499 rp->rnid.rnid_cmd = ELS_LS_ACC;
500 rp->rnid.rnid_fmt = fmt;
501 rp->rnid.rnid_cid_len = sizeof(rp->cid);
502 rp->cid.rnid_wwpn = htonll(lport->wwpn);
503 rp->cid.rnid_wwnn = htonll(lport->wwnn);
504 if (fmt == ELS_RNIDF_GEN) {
505 rp->rnid.rnid_sid_len = sizeof(rp->gen);
506 memcpy(&rp->gen, &lport->rnid_gen,
509 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
510 lport->tt.frame_send(lport, fp);
513 fc_frame_free(in_fp);
517 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
518 * @lport: The local port receiving the LOGO
519 * @fp: The LOGO request frame
521 static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
523 lockdep_assert_held(&lport->lp_mutex);
525 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
526 fc_lport_enter_reset(lport);
531 * fc_fabric_login() - Start the lport state machine
532 * @lport: The local port that should log into the fabric
534 * Locking Note: This function should not be called
535 * with the lport lock held.
537 int fc_fabric_login(struct fc_lport *lport)
541 mutex_lock(&lport->lp_mutex);
542 if (lport->state == LPORT_ST_DISABLED ||
543 lport->state == LPORT_ST_LOGO) {
544 fc_lport_state_enter(lport, LPORT_ST_RESET);
545 fc_lport_enter_reset(lport);
548 mutex_unlock(&lport->lp_mutex);
552 EXPORT_SYMBOL(fc_fabric_login);
555 * __fc_linkup() - Handler for transport linkup events
556 * @lport: The lport whose link is up
558 void __fc_linkup(struct fc_lport *lport)
560 lockdep_assert_held(&lport->lp_mutex);
562 if (!lport->link_up) {
565 if (lport->state == LPORT_ST_RESET)
566 fc_lport_enter_flogi(lport);
571 * fc_linkup() - Handler for transport linkup events
572 * @lport: The local port whose link is up
574 void fc_linkup(struct fc_lport *lport)
576 printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
577 lport->host->host_no, lport->port_id);
579 mutex_lock(&lport->lp_mutex);
581 mutex_unlock(&lport->lp_mutex);
583 EXPORT_SYMBOL(fc_linkup);
586 * __fc_linkdown() - Handler for transport linkdown events
587 * @lport: The lport whose link is down
589 void __fc_linkdown(struct fc_lport *lport)
591 lockdep_assert_held(&lport->lp_mutex);
593 if (lport->link_up) {
595 fc_lport_enter_reset(lport);
596 lport->tt.fcp_cleanup(lport);
601 * fc_linkdown() - Handler for transport linkdown events
602 * @lport: The local port whose link is down
604 void fc_linkdown(struct fc_lport *lport)
606 printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
607 lport->host->host_no, lport->port_id);
609 mutex_lock(&lport->lp_mutex);
610 __fc_linkdown(lport);
611 mutex_unlock(&lport->lp_mutex);
613 EXPORT_SYMBOL(fc_linkdown);
616 * fc_fabric_logoff() - Logout of the fabric
617 * @lport: The local port to logoff the fabric
620 * 0 for success, -1 for failure
622 int fc_fabric_logoff(struct fc_lport *lport)
624 lport->tt.disc_stop_final(lport);
625 mutex_lock(&lport->lp_mutex);
626 if (lport->dns_rdata)
627 fc_rport_logoff(lport->dns_rdata);
628 mutex_unlock(&lport->lp_mutex);
629 fc_rport_flush_queue();
630 mutex_lock(&lport->lp_mutex);
631 fc_lport_enter_logo(lport);
632 mutex_unlock(&lport->lp_mutex);
633 cancel_delayed_work_sync(&lport->retry_work);
636 EXPORT_SYMBOL(fc_fabric_logoff);
639 * fc_lport_destroy() - Unregister a fc_lport
640 * @lport: The local port to unregister
643 * exit routine for fc_lport instance
644 * clean-up all the allocated memory
645 * and free up other system resources.
648 int fc_lport_destroy(struct fc_lport *lport)
650 mutex_lock(&lport->lp_mutex);
651 lport->state = LPORT_ST_DISABLED;
653 lport->tt.frame_send = fc_frame_drop;
654 mutex_unlock(&lport->lp_mutex);
656 lport->tt.fcp_abort_io(lport);
657 lport->tt.disc_stop_final(lport);
658 lport->tt.exch_mgr_reset(lport, 0, 0);
659 cancel_delayed_work_sync(&lport->retry_work);
660 fc_fc4_del_lport(lport);
663 EXPORT_SYMBOL(fc_lport_destroy);
666 * fc_set_mfs() - Set the maximum frame size for a local port
667 * @lport: The local port to set the MFS for
670 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
672 unsigned int old_mfs;
675 mutex_lock(&lport->lp_mutex);
677 old_mfs = lport->mfs;
679 if (mfs >= FC_MIN_MAX_FRAME) {
681 if (mfs > FC_MAX_FRAME)
683 mfs -= sizeof(struct fc_frame_header);
688 if (!rc && mfs < old_mfs)
689 fc_lport_enter_reset(lport);
691 mutex_unlock(&lport->lp_mutex);
695 EXPORT_SYMBOL(fc_set_mfs);
698 * fc_lport_disc_callback() - Callback for discovery events
699 * @lport: The local port receiving the event
700 * @event: The discovery event
702 static void fc_lport_disc_callback(struct fc_lport *lport,
703 enum fc_disc_event event)
706 case DISC_EV_SUCCESS:
707 FC_LPORT_DBG(lport, "Discovery succeeded\n");
710 printk(KERN_ERR "host%d: libfc: "
711 "Discovery failed for port (%6.6x)\n",
712 lport->host->host_no, lport->port_id);
713 mutex_lock(&lport->lp_mutex);
714 fc_lport_enter_reset(lport);
715 mutex_unlock(&lport->lp_mutex);
724 * fc_rport_enter_ready() - Enter the ready state and start discovery
725 * @lport: The local port that is ready
727 static void fc_lport_enter_ready(struct fc_lport *lport)
729 lockdep_assert_held(&lport->lp_mutex);
731 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
732 fc_lport_state(lport));
734 fc_lport_state_enter(lport, LPORT_ST_READY);
736 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
737 fc_vports_linkchange(lport);
739 if (!lport->ptp_rdata)
740 lport->tt.disc_start(fc_lport_disc_callback, lport);
744 * fc_lport_set_port_id() - set the local port Port ID
745 * @lport: The local port which will have its Port ID set.
746 * @port_id: The new port ID.
747 * @fp: The frame containing the incoming request, or NULL.
749 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
752 lockdep_assert_held(&lport->lp_mutex);
755 printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
756 lport->host->host_no, port_id);
758 lport->port_id = port_id;
760 /* Update the fc_host */
761 fc_host_port_id(lport->host) = port_id;
763 if (lport->tt.lport_set_port_id)
764 lport->tt.lport_set_port_id(lport, port_id, fp);
768 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
769 * @lport: The local port which will have its Port ID set.
770 * @port_id: The new port ID.
772 * Called by the lower-level driver when transport sets the local port_id.
773 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
774 * discovery to be skipped.
776 void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
778 mutex_lock(&lport->lp_mutex);
780 fc_lport_set_port_id(lport, port_id, NULL);
782 switch (lport->state) {
786 fc_lport_enter_ready(lport);
791 mutex_unlock(&lport->lp_mutex);
793 EXPORT_SYMBOL(fc_lport_set_local_id);
796 * fc_lport_recv_flogi_req() - Receive a FLOGI request
797 * @lport: The local port that received the request
798 * @rx_fp: The FLOGI frame
800 * A received FLOGI request indicates a point-to-point connection.
801 * Accept it with the common service parameters indicating our N port.
802 * Set up to do a PLOGI if we have the higher-number WWPN.
804 static void fc_lport_recv_flogi_req(struct fc_lport *lport,
805 struct fc_frame *rx_fp)
808 struct fc_frame_header *fh;
809 struct fc_els_flogi *flp;
810 struct fc_els_flogi *new_flp;
815 lockdep_assert_held(&lport->lp_mutex);
817 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
818 fc_lport_state(lport));
820 remote_fid = fc_frame_sid(rx_fp);
821 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
824 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
825 if (remote_wwpn == lport->wwpn) {
826 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
827 "with same WWPN %16.16llx\n",
828 lport->host->host_no, remote_wwpn);
831 FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
834 * XXX what is the right thing to do for FIDs?
835 * The originator might expect our S_ID to be 0xfffffe.
836 * But if so, both of us could end up with the same FID.
838 local_fid = FC_LOCAL_PTP_FID_LO;
839 if (remote_wwpn < lport->wwpn) {
840 local_fid = FC_LOCAL_PTP_FID_HI;
841 if (!remote_fid || remote_fid == local_fid)
842 remote_fid = FC_LOCAL_PTP_FID_LO;
843 } else if (!remote_fid) {
844 remote_fid = FC_LOCAL_PTP_FID_HI;
847 fc_lport_set_port_id(lport, local_fid, rx_fp);
849 fp = fc_frame_alloc(lport, sizeof(*flp));
851 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
852 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
853 new_flp->fl_cmd = (u8) ELS_LS_ACC;
856 * Send the response. If this fails, the originator should
857 * repeat the sequence.
859 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
860 fh = fc_frame_header_get(fp);
861 hton24(fh->fh_s_id, local_fid);
862 hton24(fh->fh_d_id, remote_fid);
863 lport->tt.frame_send(lport, fp);
866 fc_lport_error(lport, fp);
868 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
869 get_unaligned_be64(&flp->fl_wwnn));
871 fc_frame_free(rx_fp);
875 * fc_lport_recv_els_req() - The generic lport ELS request handler
876 * @lport: The local port that received the request
877 * @fp: The request frame
879 * This function will see if the lport handles the request or
880 * if an rport should handle the request.
882 * Locking Note: This function should not be called with the lport
883 * lock held because it will grab the lock.
885 static void fc_lport_recv_els_req(struct fc_lport *lport,
888 mutex_lock(&lport->lp_mutex);
891 * Handle special ELS cases like FLOGI, LOGO, and
892 * RSCN here. These don't require a session.
893 * Even if we had a session, it might not be ready.
901 switch (fc_frame_payload_op(fp)) {
903 if (!lport->point_to_multipoint)
904 fc_lport_recv_flogi_req(lport, fp);
906 fc_rport_recv_req(lport, fp);
909 if (fc_frame_sid(fp) == FC_FID_FLOGI)
910 fc_lport_recv_logo_req(lport, fp);
912 fc_rport_recv_req(lport, fp);
915 lport->tt.disc_recv_req(lport, fp);
918 fc_lport_recv_echo_req(lport, fp);
921 fc_lport_recv_rlir_req(lport, fp);
924 fc_lport_recv_rnid_req(lport, fp);
927 fc_rport_recv_req(lport, fp);
931 mutex_unlock(&lport->lp_mutex);
934 static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
935 const struct fc_els_spp *spp_in,
936 struct fc_els_spp *spp_out)
938 return FC_SPP_RESP_INVL;
941 struct fc4_prov fc_lport_els_prov = {
942 .prli = fc_lport_els_prli,
943 .recv = fc_lport_recv_els_req,
947 * fc_lport_recv() - The generic lport request handler
948 * @lport: The lport that received the request
949 * @fp: The frame the request is in
951 * Locking Note: This function should not be called with the lport
952 * lock held because it may grab the lock.
954 void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp)
956 struct fc_frame_header *fh = fc_frame_header_get(fp);
957 struct fc_seq *sp = fr_seq(fp);
958 struct fc4_prov *prov;
961 * Use RCU read lock and module_lock to be sure module doesn't
962 * deregister and get unloaded while we're calling it.
963 * try_module_get() is inlined and accepts a NULL parameter.
964 * Only ELSes and FCP target ops should come through here.
965 * The locking is unfortunate, and a better scheme is being sought.
969 if (fh->fh_type >= FC_FC4_PROV_SIZE)
971 prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
972 if (!prov || !try_module_get(prov->module))
975 prov->recv(lport, fp);
976 module_put(prov->module);
980 FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
985 EXPORT_SYMBOL(fc_lport_recv);
988 * fc_lport_reset() - Reset a local port
989 * @lport: The local port which should be reset
991 * Locking Note: This functions should not be called with the
994 int fc_lport_reset(struct fc_lport *lport)
996 cancel_delayed_work_sync(&lport->retry_work);
997 mutex_lock(&lport->lp_mutex);
998 fc_lport_enter_reset(lport);
999 mutex_unlock(&lport->lp_mutex);
1002 EXPORT_SYMBOL(fc_lport_reset);
1005 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
1006 * @lport: The local port to be reset
1008 static void fc_lport_reset_locked(struct fc_lport *lport)
1010 lockdep_assert_held(&lport->lp_mutex);
1012 if (lport->dns_rdata) {
1013 fc_rport_logoff(lport->dns_rdata);
1014 lport->dns_rdata = NULL;
1017 if (lport->ptp_rdata) {
1018 fc_rport_logoff(lport->ptp_rdata);
1019 kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
1020 lport->ptp_rdata = NULL;
1023 lport->tt.disc_stop(lport);
1025 lport->tt.exch_mgr_reset(lport, 0, 0);
1026 fc_host_fabric_name(lport->host) = 0;
1028 if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
1029 fc_lport_set_port_id(lport, 0, NULL);
1033 * fc_lport_enter_reset() - Reset the local port
1034 * @lport: The local port to be reset
1036 static void fc_lport_enter_reset(struct fc_lport *lport)
1038 lockdep_assert_held(&lport->lp_mutex);
1040 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
1041 fc_lport_state(lport));
1043 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
1048 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
1050 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
1052 fc_lport_state_enter(lport, LPORT_ST_RESET);
1053 fc_host_post_event(lport->host, fc_get_event_number(),
1054 FCH_EVT_LIPRESET, 0);
1055 fc_vports_linkchange(lport);
1056 fc_lport_reset_locked(lport);
1058 fc_lport_enter_flogi(lport);
1062 * fc_lport_enter_disabled() - Disable the local port
1063 * @lport: The local port to be reset
1065 static void fc_lport_enter_disabled(struct fc_lport *lport)
1067 lockdep_assert_held(&lport->lp_mutex);
1069 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1070 fc_lport_state(lport));
1072 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1073 fc_vports_linkchange(lport);
1074 fc_lport_reset_locked(lport);
1078 * fc_lport_error() - Handler for any errors
1079 * @lport: The local port that the error was on
1080 * @fp: The error code encoded in a frame pointer
1082 * If the error was caused by a resource allocation failure
1083 * then wait for half a second and retry, otherwise retry
1084 * after the e_d_tov time.
1086 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1088 unsigned long delay = 0;
1089 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1090 IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport),
1091 lport->retry_count);
1093 if (PTR_ERR(fp) == -FC_EX_CLOSED)
1097 * Memory allocation failure, or the exchange timed out
1098 * or we received LS_RJT.
1101 if (lport->retry_count < lport->max_retry_count) {
1102 lport->retry_count++;
1104 delay = msecs_to_jiffies(500);
1106 delay = msecs_to_jiffies(lport->e_d_tov);
1108 schedule_delayed_work(&lport->retry_work, delay);
1110 fc_lport_enter_reset(lport);
1114 * fc_lport_ns_resp() - Handle response to a name server
1115 * registration exchange
1116 * @sp: current sequence in exchange
1117 * @fp: response frame
1118 * @lp_arg: Fibre Channel host port instance
1120 * Locking Note: This function will be called without the lport lock
1121 * held, but it will lock, call an _enter_* function or fc_lport_error()
1122 * and then unlock the lport.
1124 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1127 struct fc_lport *lport = lp_arg;
1128 struct fc_frame_header *fh;
1129 struct fc_ct_hdr *ct;
1131 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1133 if (fp == ERR_PTR(-FC_EX_CLOSED))
1136 mutex_lock(&lport->lp_mutex);
1138 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1139 FC_LPORT_DBG(lport, "Received a name server response, "
1140 "but in state %s\n", fc_lport_state(lport));
1147 fc_lport_error(lport, fp);
1151 fh = fc_frame_header_get(fp);
1152 ct = fc_frame_payload_get(fp, sizeof(*ct));
1154 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1155 ct->ct_fs_type == FC_FST_DIR &&
1156 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1157 ntohs(ct->ct_cmd) == FC_FS_ACC)
1158 switch (lport->state) {
1159 case LPORT_ST_RNN_ID:
1160 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1162 case LPORT_ST_RSNN_NN:
1163 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1165 case LPORT_ST_RSPN_ID:
1166 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1168 case LPORT_ST_RFT_ID:
1169 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1171 case LPORT_ST_RFF_ID:
1172 if (lport->fdmi_enabled)
1173 fc_lport_enter_fdmi(lport);
1175 fc_lport_enter_scr(lport);
1178 /* should have already been caught by state checks */
1182 fc_lport_error(lport, fp);
1186 mutex_unlock(&lport->lp_mutex);
1190 * fc_lport_ms_resp() - Handle response to a management server
1192 * @sp: current sequence in exchange
1193 * @fp: response frame
1194 * @lp_arg: Fibre Channel host port instance
1196 * Locking Note: This function will be called without the lport lock
1197 * held, but it will lock, call an _enter_* function or fc_lport_error()
1198 * and then unlock the lport.
1200 static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp,
1203 struct fc_lport *lport = lp_arg;
1204 struct fc_frame_header *fh;
1205 struct fc_ct_hdr *ct;
1207 FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp));
1209 if (fp == ERR_PTR(-FC_EX_CLOSED))
1212 mutex_lock(&lport->lp_mutex);
1214 if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) {
1215 FC_LPORT_DBG(lport, "Received a management server response, "
1216 "but in state %s\n", fc_lport_state(lport));
1223 fc_lport_error(lport, fp);
1227 fh = fc_frame_header_get(fp);
1228 ct = fc_frame_payload_get(fp, sizeof(*ct));
1230 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1231 ct->ct_fs_type == FC_FST_MGMT &&
1232 ct->ct_fs_subtype == FC_FDMI_SUBTYPE) {
1233 FC_LPORT_DBG(lport, "Received a management server response, "
1234 "reason=%d explain=%d\n",
1238 switch (lport->state) {
1240 if (ntohs(ct->ct_cmd) == FC_FS_ACC)
1241 fc_lport_enter_ms(lport, LPORT_ST_RPA);
1242 else /* Error Skip RPA */
1243 fc_lport_enter_scr(lport);
1246 fc_lport_enter_scr(lport);
1249 fc_lport_enter_ms(lport, LPORT_ST_RHBA);
1252 fc_lport_enter_ms(lport, LPORT_ST_DPRT);
1255 /* should have already been caught by state checks */
1259 /* Invalid Frame? */
1260 fc_lport_error(lport, fp);
1265 mutex_unlock(&lport->lp_mutex);
1269 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1270 * @sp: current sequence in SCR exchange
1271 * @fp: response frame
1272 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1274 * Locking Note: This function will be called without the lport lock
1275 * held, but it will lock, call an _enter_* function or fc_lport_error
1276 * and then unlock the lport.
1278 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1281 struct fc_lport *lport = lp_arg;
1284 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1286 if (fp == ERR_PTR(-FC_EX_CLOSED))
1289 mutex_lock(&lport->lp_mutex);
1291 if (lport->state != LPORT_ST_SCR) {
1292 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1293 "%s\n", fc_lport_state(lport));
1300 fc_lport_error(lport, fp);
1304 op = fc_frame_payload_op(fp);
1305 if (op == ELS_LS_ACC)
1306 fc_lport_enter_ready(lport);
1308 fc_lport_error(lport, fp);
1313 mutex_unlock(&lport->lp_mutex);
1317 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1318 * @lport: The local port to register for state changes
1320 static void fc_lport_enter_scr(struct fc_lport *lport)
1322 struct fc_frame *fp;
1324 lockdep_assert_held(&lport->lp_mutex);
1326 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1327 fc_lport_state(lport));
1329 fc_lport_state_enter(lport, LPORT_ST_SCR);
1331 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1333 fc_lport_error(lport, fp);
1337 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1338 fc_lport_scr_resp, lport,
1339 2 * lport->r_a_tov))
1340 fc_lport_error(lport, NULL);
1344 * fc_lport_enter_ns() - register some object with the name server
1345 * @lport: Fibre Channel local port to register
1347 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1349 struct fc_frame *fp;
1351 int size = sizeof(struct fc_ct_hdr);
1354 lockdep_assert_held(&lport->lp_mutex);
1356 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1357 fc_lport_state_names[state],
1358 fc_lport_state(lport));
1360 fc_lport_state_enter(lport, state);
1363 case LPORT_ST_RNN_ID:
1365 size += sizeof(struct fc_ns_rn_id);
1367 case LPORT_ST_RSNN_NN:
1368 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1369 /* if there is no symbolic name, skip to RFT_ID */
1371 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1372 cmd = FC_NS_RSNN_NN;
1373 size += sizeof(struct fc_ns_rsnn) + len;
1375 case LPORT_ST_RSPN_ID:
1376 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1377 /* if there is no symbolic name, skip to RFT_ID */
1379 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1380 cmd = FC_NS_RSPN_ID;
1381 size += sizeof(struct fc_ns_rspn) + len;
1383 case LPORT_ST_RFT_ID:
1385 size += sizeof(struct fc_ns_rft);
1387 case LPORT_ST_RFF_ID:
1389 size += sizeof(struct fc_ns_rff_id);
1392 fc_lport_error(lport, NULL);
1396 fp = fc_frame_alloc(lport, size);
1398 fc_lport_error(lport, fp);
1402 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1404 lport, 3 * lport->r_a_tov))
1405 fc_lport_error(lport, fp);
1408 static struct fc_rport_operations fc_lport_rport_ops = {
1409 .event_callback = fc_lport_rport_callback,
1413 * fc_rport_enter_dns() - Create a fc_rport for the name server
1414 * @lport: The local port requesting a remote port for the name server
1416 static void fc_lport_enter_dns(struct fc_lport *lport)
1418 struct fc_rport_priv *rdata;
1420 lockdep_assert_held(&lport->lp_mutex);
1422 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1423 fc_lport_state(lport));
1425 fc_lport_state_enter(lport, LPORT_ST_DNS);
1427 mutex_lock(&lport->disc.disc_mutex);
1428 rdata = fc_rport_create(lport, FC_FID_DIR_SERV);
1429 mutex_unlock(&lport->disc.disc_mutex);
1433 rdata->ops = &fc_lport_rport_ops;
1434 fc_rport_login(rdata);
1438 fc_lport_error(lport, NULL);
1442 * fc_lport_enter_ms() - management server commands
1443 * @lport: Fibre Channel local port to register
1445 static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state)
1447 struct fc_frame *fp;
1448 enum fc_fdmi_req cmd;
1449 int size = sizeof(struct fc_ct_hdr);
1453 lockdep_assert_held(&lport->lp_mutex);
1455 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1456 fc_lport_state_names[state],
1457 fc_lport_state(lport));
1459 fc_lport_state_enter(lport, state);
1464 /* Number of HBA Attributes */
1466 len = sizeof(struct fc_fdmi_rhba);
1467 len -= sizeof(struct fc_fdmi_attr_entry);
1468 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1469 len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
1470 len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
1471 len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
1472 len += FC_FDMI_HBA_ATTR_MODEL_LEN;
1473 len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
1474 len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
1475 len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
1476 len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
1477 len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
1478 len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
1484 /* Number of Port Attributes */
1486 len = sizeof(struct fc_fdmi_rpa);
1487 len -= sizeof(struct fc_fdmi_attr_entry);
1488 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1489 len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
1490 len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
1491 len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
1492 len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
1493 len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
1494 len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
1500 len = sizeof(struct fc_fdmi_dprt);
1505 len = sizeof(struct fc_fdmi_dhba);
1509 fc_lport_error(lport, NULL);
1513 FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n",
1514 cmd, (int)len, size);
1515 fp = fc_frame_alloc(lport, size);
1517 fc_lport_error(lport, fp);
1521 if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd,
1523 lport, 3 * lport->r_a_tov))
1524 fc_lport_error(lport, fp);
1528 * fc_rport_enter_fdmi() - Create a fc_rport for the management server
1529 * @lport: The local port requesting a remote port for the management server
1531 static void fc_lport_enter_fdmi(struct fc_lport *lport)
1533 struct fc_rport_priv *rdata;
1535 lockdep_assert_held(&lport->lp_mutex);
1537 FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n",
1538 fc_lport_state(lport));
1540 fc_lport_state_enter(lport, LPORT_ST_FDMI);
1542 mutex_lock(&lport->disc.disc_mutex);
1543 rdata = fc_rport_create(lport, FC_FID_MGMT_SERV);
1544 mutex_unlock(&lport->disc.disc_mutex);
1548 rdata->ops = &fc_lport_rport_ops;
1549 fc_rport_login(rdata);
1553 fc_lport_error(lport, NULL);
1557 * fc_lport_timeout() - Handler for the retry_work timer
1558 * @work: The work struct of the local port
1560 static void fc_lport_timeout(struct work_struct *work)
1562 struct fc_lport *lport =
1563 container_of(work, struct fc_lport,
1566 mutex_lock(&lport->lp_mutex);
1568 switch (lport->state) {
1569 case LPORT_ST_DISABLED:
1571 case LPORT_ST_READY:
1573 case LPORT_ST_RESET:
1575 case LPORT_ST_FLOGI:
1576 fc_lport_enter_flogi(lport);
1579 fc_lport_enter_dns(lport);
1581 case LPORT_ST_RNN_ID:
1582 case LPORT_ST_RSNN_NN:
1583 case LPORT_ST_RSPN_ID:
1584 case LPORT_ST_RFT_ID:
1585 case LPORT_ST_RFF_ID:
1586 fc_lport_enter_ns(lport, lport->state);
1589 fc_lport_enter_fdmi(lport);
1595 FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n",
1596 fc_lport_state(lport));
1599 fc_lport_enter_scr(lport);
1602 fc_lport_enter_logo(lport);
1606 mutex_unlock(&lport->lp_mutex);
1610 * fc_lport_logo_resp() - Handle response to LOGO request
1611 * @sp: The sequence that the LOGO was on
1612 * @fp: The LOGO frame
1613 * @lp_arg: The lport port that received the LOGO request
1615 * Locking Note: This function will be called without the lport lock
1616 * held, but it will lock, call an _enter_* function or fc_lport_error()
1617 * and then unlock the lport.
1619 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1622 struct fc_lport *lport = lp_arg;
1625 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1627 if (fp == ERR_PTR(-FC_EX_CLOSED))
1630 mutex_lock(&lport->lp_mutex);
1632 if (lport->state != LPORT_ST_LOGO) {
1633 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1634 "%s\n", fc_lport_state(lport));
1641 fc_lport_error(lport, fp);
1645 op = fc_frame_payload_op(fp);
1646 if (op == ELS_LS_ACC)
1647 fc_lport_enter_disabled(lport);
1649 fc_lport_error(lport, fp);
1654 mutex_unlock(&lport->lp_mutex);
1656 EXPORT_SYMBOL(fc_lport_logo_resp);
1659 * fc_rport_enter_logo() - Logout of the fabric
1660 * @lport: The local port to be logged out
1662 static void fc_lport_enter_logo(struct fc_lport *lport)
1664 struct fc_frame *fp;
1665 struct fc_els_logo *logo;
1667 lockdep_assert_held(&lport->lp_mutex);
1669 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1670 fc_lport_state(lport));
1672 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1673 fc_vports_linkchange(lport);
1675 fp = fc_frame_alloc(lport, sizeof(*logo));
1677 fc_lport_error(lport, fp);
1681 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1682 fc_lport_logo_resp, lport,
1683 2 * lport->r_a_tov))
1684 fc_lport_error(lport, NULL);
1688 * fc_lport_flogi_resp() - Handle response to FLOGI request
1689 * @sp: The sequence that the FLOGI was on
1690 * @fp: The FLOGI response frame
1691 * @lp_arg: The lport port that received the FLOGI response
1693 * Locking Note: This function will be called without the lport lock
1694 * held, but it will lock, call an _enter_* function or fc_lport_error()
1695 * and then unlock the lport.
1697 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1700 struct fc_lport *lport = lp_arg;
1701 struct fc_frame_header *fh;
1702 struct fc_els_flogi *flp;
1705 unsigned int r_a_tov;
1706 unsigned int e_d_tov;
1709 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1711 if (fp == ERR_PTR(-FC_EX_CLOSED))
1714 mutex_lock(&lport->lp_mutex);
1716 if (lport->state != LPORT_ST_FLOGI) {
1717 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1718 "%s\n", fc_lport_state(lport));
1725 fc_lport_error(lport, fp);
1729 fh = fc_frame_header_get(fp);
1730 did = fc_frame_did(fp);
1731 if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 ||
1732 fc_frame_payload_op(fp) != ELS_LS_ACC) {
1733 FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n");
1734 fc_lport_error(lport, fp);
1738 flp = fc_frame_payload_get(fp, sizeof(*flp));
1740 FC_LPORT_DBG(lport, "FLOGI bad response\n");
1741 fc_lport_error(lport, fp);
1745 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1748 if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) {
1749 FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
1750 "lport->mfs:%u\n", mfs, lport->mfs);
1751 fc_lport_error(lport, fp);
1755 if (mfs <= lport->mfs) {
1757 fc_host_maxframe_size(lport->host) = mfs;
1760 csp_flags = ntohs(flp->fl_csp.sp_features);
1761 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1762 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1763 if (csp_flags & FC_SP_FT_EDTR)
1766 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1768 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1769 if (e_d_tov > lport->e_d_tov)
1770 lport->e_d_tov = e_d_tov;
1771 lport->r_a_tov = 2 * lport->e_d_tov;
1772 fc_lport_set_port_id(lport, did, fp);
1773 printk(KERN_INFO "host%d: libfc: "
1774 "Port (%6.6x) entered "
1775 "point-to-point mode\n",
1776 lport->host->host_no, did);
1777 fc_lport_ptp_setup(lport, fc_frame_sid(fp),
1783 if (e_d_tov > lport->e_d_tov)
1784 lport->e_d_tov = e_d_tov;
1785 if (r_a_tov > lport->r_a_tov)
1786 lport->r_a_tov = r_a_tov;
1787 fc_host_fabric_name(lport->host) =
1788 get_unaligned_be64(&flp->fl_wwnn);
1789 fc_lport_set_port_id(lport, did, fp);
1790 fc_lport_enter_dns(lport);
1796 mutex_unlock(&lport->lp_mutex);
1798 EXPORT_SYMBOL(fc_lport_flogi_resp);
1801 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1802 * @lport: Fibre Channel local port to be logged in to the fabric
1804 static void fc_lport_enter_flogi(struct fc_lport *lport)
1806 struct fc_frame *fp;
1808 lockdep_assert_held(&lport->lp_mutex);
1810 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1811 fc_lport_state(lport));
1813 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1815 if (lport->point_to_multipoint) {
1817 fc_lport_enter_ready(lport);
1821 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1823 return fc_lport_error(lport, fp);
1825 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1826 lport->vport ? ELS_FDISC : ELS_FLOGI,
1827 fc_lport_flogi_resp, lport,
1828 lport->vport ? 2 * lport->r_a_tov :
1830 fc_lport_error(lport, NULL);
1834 * fc_lport_config() - Configure a fc_lport
1835 * @lport: The local port to be configured
1837 int fc_lport_config(struct fc_lport *lport)
1839 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1840 mutex_init(&lport->lp_mutex);
1842 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1844 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1845 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1846 fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
1850 EXPORT_SYMBOL(fc_lport_config);
1853 * fc_lport_init() - Initialize the lport layer for a local port
1854 * @lport: The local port to initialize the exchange layer for
1856 int fc_lport_init(struct fc_lport *lport)
1858 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1859 fc_host_node_name(lport->host) = lport->wwnn;
1860 fc_host_port_name(lport->host) = lport->wwpn;
1861 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1862 memset(fc_host_supported_fc4s(lport->host), 0,
1863 sizeof(fc_host_supported_fc4s(lport->host)));
1864 fc_host_supported_fc4s(lport->host)[2] = 1;
1865 fc_host_supported_fc4s(lport->host)[7] = 1;
1867 /* This value is also unchanging */
1868 memset(fc_host_active_fc4s(lport->host), 0,
1869 sizeof(fc_host_active_fc4s(lport->host)));
1870 fc_host_active_fc4s(lport->host)[2] = 1;
1871 fc_host_active_fc4s(lport->host)[7] = 1;
1872 fc_host_maxframe_size(lport->host) = lport->mfs;
1873 fc_host_supported_speeds(lport->host) = 0;
1874 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1875 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1876 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1877 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1878 fc_fc4_add_lport(lport);
1882 EXPORT_SYMBOL(fc_lport_init);
1885 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1886 * @sp: The sequence for the FC Passthrough response
1887 * @fp: The response frame
1888 * @info_arg: The BSG info that the response is for
1890 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1893 struct fc_bsg_info *info = info_arg;
1894 struct bsg_job *job = info->job;
1895 struct fc_bsg_reply *bsg_reply = job->reply;
1896 struct fc_lport *lport = info->lport;
1897 struct fc_frame_header *fh;
1902 bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1903 -ECONNABORTED : -ETIMEDOUT;
1904 job->reply_len = sizeof(uint32_t);
1905 bsg_job_done(job, bsg_reply->result,
1906 bsg_reply->reply_payload_rcv_len);
1911 mutex_lock(&lport->lp_mutex);
1912 fh = fc_frame_header_get(fp);
1913 len = fr_len(fp) - sizeof(*fh);
1914 buf = fc_frame_payload_get(fp, 0);
1916 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1917 /* Get the response code from the first frame payload */
1918 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1919 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1920 (unsigned short)fc_frame_payload_op(fp);
1922 /* Save the reply status of the job */
1923 bsg_reply->reply_data.ctels_reply.status =
1924 (cmd == info->rsp_code) ?
1925 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1928 bsg_reply->reply_payload_rcv_len +=
1929 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1930 &info->offset, NULL);
1932 if (fr_eof(fp) == FC_EOF_T &&
1933 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1934 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1935 if (bsg_reply->reply_payload_rcv_len >
1936 job->reply_payload.payload_len)
1937 bsg_reply->reply_payload_rcv_len =
1938 job->reply_payload.payload_len;
1939 bsg_reply->result = 0;
1940 bsg_job_done(job, bsg_reply->result,
1941 bsg_reply->reply_payload_rcv_len);
1945 mutex_unlock(&lport->lp_mutex);
1949 * fc_lport_els_request() - Send ELS passthrough request
1950 * @job: The BSG Passthrough job
1951 * @lport: The local port sending the request
1952 * @did: The destination port id
1954 static int fc_lport_els_request(struct bsg_job *job,
1955 struct fc_lport *lport,
1958 struct fc_bsg_info *info;
1959 struct fc_frame *fp;
1960 struct fc_frame_header *fh;
1964 lockdep_assert_held(&lport->lp_mutex);
1966 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1970 len = job->request_payload.payload_len;
1971 pp = fc_frame_payload_get(fp, len);
1973 sg_copy_to_buffer(job->request_payload.sg_list,
1974 job->request_payload.sg_cnt,
1977 fh = fc_frame_header_get(fp);
1978 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1979 hton24(fh->fh_d_id, did);
1980 hton24(fh->fh_s_id, lport->port_id);
1981 fh->fh_type = FC_TYPE_ELS;
1982 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1985 fh->fh_parm_offset = 0;
1987 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1994 info->lport = lport;
1995 info->rsp_code = ELS_LS_ACC;
1996 info->nents = job->reply_payload.sg_cnt;
1997 info->sg = job->reply_payload.sg_list;
1999 if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
2008 * fc_lport_ct_request() - Send CT Passthrough request
2009 * @job: The BSG Passthrough job
2010 * @lport: The local port sending the request
2011 * @did: The destination FC-ID
2012 * @tov: The timeout period to wait for the response
2014 static int fc_lport_ct_request(struct bsg_job *job,
2015 struct fc_lport *lport, u32 did, u32 tov)
2017 struct fc_bsg_info *info;
2018 struct fc_frame *fp;
2019 struct fc_frame_header *fh;
2020 struct fc_ct_req *ct;
2023 lockdep_assert_held(&lport->lp_mutex);
2025 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
2026 job->request_payload.payload_len);
2030 len = job->request_payload.payload_len;
2031 ct = fc_frame_payload_get(fp, len);
2033 sg_copy_to_buffer(job->request_payload.sg_list,
2034 job->request_payload.sg_cnt,
2037 fh = fc_frame_header_get(fp);
2038 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
2039 hton24(fh->fh_d_id, did);
2040 hton24(fh->fh_s_id, lport->port_id);
2041 fh->fh_type = FC_TYPE_CT;
2042 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
2045 fh->fh_parm_offset = 0;
2047 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
2054 info->lport = lport;
2055 info->rsp_code = FC_FS_ACC;
2056 info->nents = job->reply_payload.sg_cnt;
2057 info->sg = job->reply_payload.sg_list;
2059 if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
2068 * fc_lport_bsg_request() - The common entry point for sending
2069 * FC Passthrough requests
2070 * @job: The BSG passthrough job
2072 int fc_lport_bsg_request(struct bsg_job *job)
2074 struct fc_bsg_request *bsg_request = job->request;
2075 struct fc_bsg_reply *bsg_reply = job->reply;
2076 struct Scsi_Host *shost = fc_bsg_to_shost(job);
2077 struct fc_lport *lport = shost_priv(shost);
2078 struct fc_rport *rport;
2079 struct fc_rport_priv *rdata;
2083 bsg_reply->reply_payload_rcv_len = 0;
2085 mutex_lock(&lport->lp_mutex);
2087 switch (bsg_request->msgcode) {
2088 case FC_BSG_RPT_ELS:
2089 rport = fc_bsg_to_rport(job);
2093 rdata = rport->dd_data;
2094 rc = fc_lport_els_request(job, lport, rport->port_id,
2099 rport = fc_bsg_to_rport(job);
2103 rdata = rport->dd_data;
2104 rc = fc_lport_ct_request(job, lport, rport->port_id,
2109 did = ntoh24(bsg_request->rqst_data.h_ct.port_id);
2110 if (did == FC_FID_DIR_SERV) {
2111 rdata = lport->dns_rdata;
2114 tov = rdata->e_d_tov;
2116 rdata = fc_rport_lookup(lport, did);
2119 tov = rdata->e_d_tov;
2120 kref_put(&rdata->kref, fc_rport_destroy);
2123 rc = fc_lport_ct_request(job, lport, did, tov);
2126 case FC_BSG_HST_ELS_NOLOGIN:
2127 did = ntoh24(bsg_request->rqst_data.h_els.port_id);
2128 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
2132 mutex_unlock(&lport->lp_mutex);
2135 EXPORT_SYMBOL(fc_lport_bsg_request);