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 heirarchy 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 heirarchy-
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 becuase 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/slab.h>
92 #include <asm/unaligned.h>
94 #include <scsi/fc/fc_gs.h>
96 #include <scsi/libfc.h>
97 #include <scsi/fc_encode.h>
98 #include <linux/scatterlist.h>
100 #include "fc_libfc.h"
102 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
103 #define FC_LOCAL_PTP_FID_LO 0x010101
104 #define FC_LOCAL_PTP_FID_HI 0x010102
106 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
108 static void fc_lport_error(struct fc_lport *, struct fc_frame *);
110 static void fc_lport_enter_reset(struct fc_lport *);
111 static void fc_lport_enter_flogi(struct fc_lport *);
112 static void fc_lport_enter_dns(struct fc_lport *);
113 static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
114 static void fc_lport_enter_scr(struct fc_lport *);
115 static void fc_lport_enter_ready(struct fc_lport *);
116 static void fc_lport_enter_logo(struct fc_lport *);
118 static const char *fc_lport_state_names[] = {
119 [LPORT_ST_DISABLED] = "disabled",
120 [LPORT_ST_FLOGI] = "FLOGI",
121 [LPORT_ST_DNS] = "dNS",
122 [LPORT_ST_RNN_ID] = "RNN_ID",
123 [LPORT_ST_RSNN_NN] = "RSNN_NN",
124 [LPORT_ST_RSPN_ID] = "RSPN_ID",
125 [LPORT_ST_RFT_ID] = "RFT_ID",
126 [LPORT_ST_RFF_ID] = "RFF_ID",
127 [LPORT_ST_SCR] = "SCR",
128 [LPORT_ST_READY] = "Ready",
129 [LPORT_ST_LOGO] = "LOGO",
130 [LPORT_ST_RESET] = "reset",
134 * struct fc_bsg_info - FC Passthrough managemet structure
135 * @job: The passthrough job
136 * @lport: The local port to pass through a command
137 * @rsp_code: The expected response code
138 * @sg: job->reply_payload.sg_list
139 * @nents: job->reply_payload.sg_cnt
140 * @offset: The offset into the response data
143 struct fc_bsg_job *job;
144 struct fc_lport *lport;
146 struct scatterlist *sg;
152 * fc_frame_drop() - Dummy frame handler
153 * @lport: The local port the frame was received on
154 * @fp: The received frame
156 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
163 * fc_lport_rport_callback() - Event handler for rport events
164 * @lport: The lport which is receiving the event
165 * @rdata: private remote port data
166 * @event: The event that occured
168 * Locking Note: The rport lock should not be held when calling
171 static void fc_lport_rport_callback(struct fc_lport *lport,
172 struct fc_rport_priv *rdata,
173 enum fc_rport_event event)
175 FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
178 mutex_lock(&lport->lp_mutex);
181 if (lport->state == LPORT_ST_DNS) {
182 lport->dns_rdata = rdata;
183 fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
185 FC_LPORT_DBG(lport, "Received an READY event "
186 "on port (%6.6x) for the directory "
187 "server, but the lport is not "
188 "in the DNS state, it's in the "
189 "%d state", rdata->ids.port_id,
191 lport->tt.rport_logoff(rdata);
195 case RPORT_EV_FAILED:
197 lport->dns_rdata = NULL;
202 mutex_unlock(&lport->lp_mutex);
206 * fc_lport_state() - Return a string which represents the lport's state
207 * @lport: The lport whose state is to converted to a string
209 static const char *fc_lport_state(struct fc_lport *lport)
213 cp = fc_lport_state_names[lport->state];
220 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
221 * @lport: The lport to attach the ptp rport to
222 * @remote_fid: The FID of the ptp rport
223 * @remote_wwpn: The WWPN of the ptp rport
224 * @remote_wwnn: The WWNN of the ptp rport
226 static void fc_lport_ptp_setup(struct fc_lport *lport,
227 u32 remote_fid, u64 remote_wwpn,
230 mutex_lock(&lport->disc.disc_mutex);
231 if (lport->ptp_rdata) {
232 lport->tt.rport_logoff(lport->ptp_rdata);
233 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
235 lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
236 kref_get(&lport->ptp_rdata->kref);
237 lport->ptp_rdata->ids.port_name = remote_wwpn;
238 lport->ptp_rdata->ids.node_name = remote_wwnn;
239 mutex_unlock(&lport->disc.disc_mutex);
241 lport->tt.rport_login(lport->ptp_rdata);
243 fc_lport_enter_ready(lport);
247 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
248 * @shost: The SCSI host whose port state is to be determined
250 void fc_get_host_port_state(struct Scsi_Host *shost)
252 struct fc_lport *lport = shost_priv(shost);
254 mutex_lock(&lport->lp_mutex);
256 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
258 switch (lport->state) {
260 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
263 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
265 mutex_unlock(&lport->lp_mutex);
267 EXPORT_SYMBOL(fc_get_host_port_state);
270 * fc_get_host_speed() - Return the speed of the given Scsi_Host
271 * @shost: The SCSI host whose port speed is to be determined
273 void fc_get_host_speed(struct Scsi_Host *shost)
275 struct fc_lport *lport = shost_priv(shost);
277 fc_host_speed(shost) = lport->link_speed;
279 EXPORT_SYMBOL(fc_get_host_speed);
282 * fc_get_host_stats() - Return the Scsi_Host's statistics
283 * @shost: The SCSI host whose statistics are to be returned
285 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
287 struct fc_host_statistics *fcoe_stats;
288 struct fc_lport *lport = shost_priv(shost);
289 struct timespec v0, v1;
292 fcoe_stats = &lport->host_stats;
293 memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
295 jiffies_to_timespec(jiffies, &v0);
296 jiffies_to_timespec(lport->boot_time, &v1);
297 fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
299 for_each_possible_cpu(cpu) {
300 struct fcoe_dev_stats *stats;
302 stats = per_cpu_ptr(lport->dev_stats, cpu);
304 fcoe_stats->tx_frames += stats->TxFrames;
305 fcoe_stats->tx_words += stats->TxWords;
306 fcoe_stats->rx_frames += stats->RxFrames;
307 fcoe_stats->rx_words += stats->RxWords;
308 fcoe_stats->error_frames += stats->ErrorFrames;
309 fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
310 fcoe_stats->fcp_input_requests += stats->InputRequests;
311 fcoe_stats->fcp_output_requests += stats->OutputRequests;
312 fcoe_stats->fcp_control_requests += stats->ControlRequests;
313 fcoe_stats->fcp_input_megabytes += stats->InputMegabytes;
314 fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes;
315 fcoe_stats->link_failure_count += stats->LinkFailureCount;
317 fcoe_stats->lip_count = -1;
318 fcoe_stats->nos_count = -1;
319 fcoe_stats->loss_of_sync_count = -1;
320 fcoe_stats->loss_of_signal_count = -1;
321 fcoe_stats->prim_seq_protocol_err_count = -1;
322 fcoe_stats->dumped_frames = -1;
325 EXPORT_SYMBOL(fc_get_host_stats);
328 * fc_lport_flogi_fill() - Fill in FLOGI command for request
329 * @lport: The local port the FLOGI is for
330 * @flogi: The FLOGI command
333 static void fc_lport_flogi_fill(struct fc_lport *lport,
334 struct fc_els_flogi *flogi,
337 struct fc_els_csp *sp;
338 struct fc_els_cssp *cp;
340 memset(flogi, 0, sizeof(*flogi));
341 flogi->fl_cmd = (u8) op;
342 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
343 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
345 sp->sp_hi_ver = 0x20;
346 sp->sp_lo_ver = 0x20;
347 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
348 sp->sp_bb_data = htons((u16) lport->mfs);
349 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
350 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
351 if (op != ELS_FLOGI) {
352 sp->sp_features = htons(FC_SP_FT_CIRO);
353 sp->sp_tot_seq = htons(255); /* seq. we accept */
354 sp->sp_rel_off = htons(0x1f);
355 sp->sp_e_d_tov = htonl(lport->e_d_tov);
357 cp->cp_rdfs = htons((u16) lport->mfs);
358 cp->cp_con_seq = htons(255);
364 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
365 * @lport: The local port to add a new FC-4 type to
366 * @type: The new FC-4 type
368 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
372 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
373 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
377 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
378 * @sp: The sequence in the RLIR exchange
379 * @fp: The RLIR request frame
380 * @lport: Fibre Channel local port recieving the RLIR
382 * Locking Note: The lport lock is expected to be held before calling
385 static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
386 struct fc_lport *lport)
388 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
389 fc_lport_state(lport));
391 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
396 * fc_lport_recv_echo_req() - Handle received ECHO request
397 * @sp: The sequence in the ECHO exchange
398 * @fp: ECHO request frame
399 * @lport: The local port recieving the ECHO
401 * Locking Note: The lport lock is expected to be held before calling
404 static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
405 struct fc_lport *lport)
408 struct fc_exch *ep = fc_seq_exch(sp);
414 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
415 fc_lport_state(lport));
417 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
418 pp = fc_frame_payload_get(in_fp, len);
420 if (len < sizeof(__be32))
421 len = sizeof(__be32);
423 fp = fc_frame_alloc(lport, len);
425 dp = fc_frame_payload_get(fp, len);
427 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
428 sp = lport->tt.seq_start_next(sp);
429 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
430 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
431 FC_TYPE_ELS, f_ctl, 0);
432 lport->tt.seq_send(lport, sp, fp);
434 fc_frame_free(in_fp);
438 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
439 * @sp: The sequence in the RNID exchange
440 * @fp: The RNID request frame
441 * @lport: The local port recieving the RNID
443 * Locking Note: The lport lock is expected to be held before calling
446 static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
447 struct fc_lport *lport)
450 struct fc_exch *ep = fc_seq_exch(sp);
451 struct fc_els_rnid *req;
453 struct fc_els_rnid_resp rnid;
454 struct fc_els_rnid_cid cid;
455 struct fc_els_rnid_gen gen;
457 struct fc_seq_els_data rjt_data;
462 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
463 fc_lport_state(lport));
465 req = fc_frame_payload_get(in_fp, sizeof(*req));
468 rjt_data.reason = ELS_RJT_LOGIC;
469 rjt_data.explan = ELS_EXPL_NONE;
470 lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
474 if (fmt != ELS_RNIDF_GEN ||
475 ntohl(lport->rnid_gen.rnid_atype) == 0) {
476 fmt = ELS_RNIDF_NONE; /* nothing to provide */
477 len -= sizeof(rp->gen);
479 fp = fc_frame_alloc(lport, len);
481 rp = fc_frame_payload_get(fp, len);
483 rp->rnid.rnid_cmd = ELS_LS_ACC;
484 rp->rnid.rnid_fmt = fmt;
485 rp->rnid.rnid_cid_len = sizeof(rp->cid);
486 rp->cid.rnid_wwpn = htonll(lport->wwpn);
487 rp->cid.rnid_wwnn = htonll(lport->wwnn);
488 if (fmt == ELS_RNIDF_GEN) {
489 rp->rnid.rnid_sid_len = sizeof(rp->gen);
490 memcpy(&rp->gen, &lport->rnid_gen,
493 sp = lport->tt.seq_start_next(sp);
494 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
495 f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
496 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
497 FC_TYPE_ELS, f_ctl, 0);
498 lport->tt.seq_send(lport, sp, fp);
501 fc_frame_free(in_fp);
505 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
506 * @sp: The sequence in the LOGO exchange
507 * @fp: The LOGO request frame
508 * @lport: The local port recieving the LOGO
510 * Locking Note: The lport lock is exected to be held before calling
513 static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
514 struct fc_lport *lport)
516 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
517 fc_lport_enter_reset(lport);
522 * fc_fabric_login() - Start the lport state machine
523 * @lport: The local port that should log into the fabric
525 * Locking Note: This function should not be called
526 * with the lport lock held.
528 int fc_fabric_login(struct fc_lport *lport)
532 mutex_lock(&lport->lp_mutex);
533 if (lport->state == LPORT_ST_DISABLED ||
534 lport->state == LPORT_ST_LOGO) {
535 fc_lport_state_enter(lport, LPORT_ST_RESET);
536 fc_lport_enter_reset(lport);
539 mutex_unlock(&lport->lp_mutex);
543 EXPORT_SYMBOL(fc_fabric_login);
546 * __fc_linkup() - Handler for transport linkup events
547 * @lport: The lport whose link is up
549 * Locking: must be called with the lp_mutex held
551 void __fc_linkup(struct fc_lport *lport)
553 if (!lport->link_up) {
556 if (lport->state == LPORT_ST_RESET)
557 fc_lport_enter_flogi(lport);
562 * fc_linkup() - Handler for transport linkup events
563 * @lport: The local port whose link is up
565 void fc_linkup(struct fc_lport *lport)
567 printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
568 lport->host->host_no, fc_host_port_id(lport->host));
570 mutex_lock(&lport->lp_mutex);
572 mutex_unlock(&lport->lp_mutex);
574 EXPORT_SYMBOL(fc_linkup);
577 * __fc_linkdown() - Handler for transport linkdown events
578 * @lport: The lport whose link is down
580 * Locking: must be called with the lp_mutex held
582 void __fc_linkdown(struct fc_lport *lport)
584 if (lport->link_up) {
586 fc_lport_enter_reset(lport);
587 lport->tt.fcp_cleanup(lport);
592 * fc_linkdown() - Handler for transport linkdown events
593 * @lport: The local port whose link is down
595 void fc_linkdown(struct fc_lport *lport)
597 printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
598 lport->host->host_no, fc_host_port_id(lport->host));
600 mutex_lock(&lport->lp_mutex);
601 __fc_linkdown(lport);
602 mutex_unlock(&lport->lp_mutex);
604 EXPORT_SYMBOL(fc_linkdown);
607 * fc_fabric_logoff() - Logout of the fabric
608 * @lport: The local port to logoff the fabric
611 * 0 for success, -1 for failure
613 int fc_fabric_logoff(struct fc_lport *lport)
615 lport->tt.disc_stop_final(lport);
616 mutex_lock(&lport->lp_mutex);
617 if (lport->dns_rdata)
618 lport->tt.rport_logoff(lport->dns_rdata);
619 mutex_unlock(&lport->lp_mutex);
620 lport->tt.rport_flush_queue();
621 mutex_lock(&lport->lp_mutex);
622 fc_lport_enter_logo(lport);
623 mutex_unlock(&lport->lp_mutex);
624 cancel_delayed_work_sync(&lport->retry_work);
627 EXPORT_SYMBOL(fc_fabric_logoff);
630 * fc_lport_destroy() - Unregister a fc_lport
631 * @lport: The local port to unregister
634 * exit routine for fc_lport instance
635 * clean-up all the allocated memory
636 * and free up other system resources.
639 int fc_lport_destroy(struct fc_lport *lport)
641 mutex_lock(&lport->lp_mutex);
642 lport->state = LPORT_ST_DISABLED;
644 lport->tt.frame_send = fc_frame_drop;
645 mutex_unlock(&lport->lp_mutex);
647 lport->tt.fcp_abort_io(lport);
648 lport->tt.disc_stop_final(lport);
649 lport->tt.exch_mgr_reset(lport, 0, 0);
652 EXPORT_SYMBOL(fc_lport_destroy);
655 * fc_set_mfs() - Set the maximum frame size for a local port
656 * @lport: The local port to set the MFS for
659 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
661 unsigned int old_mfs;
664 mutex_lock(&lport->lp_mutex);
666 old_mfs = lport->mfs;
668 if (mfs >= FC_MIN_MAX_FRAME) {
670 if (mfs > FC_MAX_FRAME)
672 mfs -= sizeof(struct fc_frame_header);
677 if (!rc && mfs < old_mfs)
678 fc_lport_enter_reset(lport);
680 mutex_unlock(&lport->lp_mutex);
684 EXPORT_SYMBOL(fc_set_mfs);
687 * fc_lport_disc_callback() - Callback for discovery events
688 * @lport: The local port receiving the event
689 * @event: The discovery event
691 void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
694 case DISC_EV_SUCCESS:
695 FC_LPORT_DBG(lport, "Discovery succeeded\n");
698 printk(KERN_ERR "host%d: libfc: "
699 "Discovery failed for port (%6.6x)\n",
700 lport->host->host_no, fc_host_port_id(lport->host));
701 mutex_lock(&lport->lp_mutex);
702 fc_lport_enter_reset(lport);
703 mutex_unlock(&lport->lp_mutex);
712 * fc_rport_enter_ready() - Enter the ready state and start discovery
713 * @lport: The local port that is ready
715 * Locking Note: The lport lock is expected to be held before calling
718 static void fc_lport_enter_ready(struct fc_lport *lport)
720 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
721 fc_lport_state(lport));
723 fc_lport_state_enter(lport, LPORT_ST_READY);
725 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
726 fc_vports_linkchange(lport);
728 if (!lport->ptp_rdata)
729 lport->tt.disc_start(fc_lport_disc_callback, lport);
733 * fc_lport_set_port_id() - set the local port Port ID
734 * @lport: The local port which will have its Port ID set.
735 * @port_id: The new port ID.
736 * @fp: The frame containing the incoming request, or NULL.
738 * Locking Note: The lport lock is expected to be held before calling
741 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
745 printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
746 lport->host->host_no, port_id);
748 fc_host_port_id(lport->host) = port_id;
749 if (lport->tt.lport_set_port_id)
750 lport->tt.lport_set_port_id(lport, port_id, fp);
754 * fc_lport_recv_flogi_req() - Receive a FLOGI request
755 * @sp_in: The sequence the FLOGI is on
756 * @rx_fp: The FLOGI frame
757 * @lport: The local port that recieved the request
759 * A received FLOGI request indicates a point-to-point connection.
760 * Accept it with the common service parameters indicating our N port.
761 * Set up to do a PLOGI if we have the higher-number WWPN.
763 * Locking Note: The lport lock is expected to be held before calling
766 static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
767 struct fc_frame *rx_fp,
768 struct fc_lport *lport)
771 struct fc_frame_header *fh;
774 struct fc_els_flogi *flp;
775 struct fc_els_flogi *new_flp;
781 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
782 fc_lport_state(lport));
784 fh = fc_frame_header_get(rx_fp);
785 remote_fid = ntoh24(fh->fh_s_id);
786 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
789 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
790 if (remote_wwpn == lport->wwpn) {
791 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
792 "with same WWPN %16.16llx\n",
793 lport->host->host_no, remote_wwpn);
796 FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
799 * XXX what is the right thing to do for FIDs?
800 * The originator might expect our S_ID to be 0xfffffe.
801 * But if so, both of us could end up with the same FID.
803 local_fid = FC_LOCAL_PTP_FID_LO;
804 if (remote_wwpn < lport->wwpn) {
805 local_fid = FC_LOCAL_PTP_FID_HI;
806 if (!remote_fid || remote_fid == local_fid)
807 remote_fid = FC_LOCAL_PTP_FID_LO;
808 } else if (!remote_fid) {
809 remote_fid = FC_LOCAL_PTP_FID_HI;
812 fc_lport_set_port_id(lport, local_fid, rx_fp);
814 fp = fc_frame_alloc(lport, sizeof(*flp));
816 sp = lport->tt.seq_start_next(fr_seq(rx_fp));
817 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
818 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
819 new_flp->fl_cmd = (u8) ELS_LS_ACC;
822 * Send the response. If this fails, the originator should
823 * repeat the sequence.
825 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
826 ep = fc_seq_exch(sp);
827 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid,
828 FC_TYPE_ELS, f_ctl, 0);
829 lport->tt.seq_send(lport, sp, fp);
832 fc_lport_error(lport, fp);
834 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
835 get_unaligned_be64(&flp->fl_wwnn));
839 fc_frame_free(rx_fp);
843 * fc_lport_recv_req() - The generic lport request handler
844 * @lport: The local port that received the request
845 * @sp: The sequence the request is on
846 * @fp: The request frame
848 * This function will see if the lport handles the request or
849 * if an rport should handle the request.
851 * Locking Note: This function should not be called with the lport
852 * lock held becuase it will grab the lock.
854 static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
857 struct fc_frame_header *fh = fc_frame_header_get(fp);
858 void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
860 mutex_lock(&lport->lp_mutex);
863 * Handle special ELS cases like FLOGI, LOGO, and
864 * RSCN here. These don't require a session.
865 * Even if we had a session, it might not be ready.
869 else if (fh->fh_type == FC_TYPE_ELS &&
870 fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
874 recv = lport->tt.rport_recv_req;
875 switch (fc_frame_payload_op(fp)) {
877 recv = fc_lport_recv_flogi_req;
880 fh = fc_frame_header_get(fp);
881 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
882 recv = fc_lport_recv_logo_req;
885 recv = lport->tt.disc_recv_req;
888 recv = fc_lport_recv_echo_req;
891 recv = fc_lport_recv_rlir_req;
894 recv = fc_lport_recv_rnid_req;
900 FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
904 mutex_unlock(&lport->lp_mutex);
907 * The common exch_done for all request may not be good
908 * if any request requires longer hold on exhange. XXX
910 lport->tt.exch_done(sp);
914 * fc_lport_reset() - Reset a local port
915 * @lport: The local port which should be reset
917 * Locking Note: This functions should not be called with the
920 int fc_lport_reset(struct fc_lport *lport)
922 cancel_delayed_work_sync(&lport->retry_work);
923 mutex_lock(&lport->lp_mutex);
924 fc_lport_enter_reset(lport);
925 mutex_unlock(&lport->lp_mutex);
928 EXPORT_SYMBOL(fc_lport_reset);
931 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
932 * @lport: The local port to be reset
934 * Locking Note: The lport lock is expected to be held before calling
937 static void fc_lport_reset_locked(struct fc_lport *lport)
939 if (lport->dns_rdata)
940 lport->tt.rport_logoff(lport->dns_rdata);
942 if (lport->ptp_rdata) {
943 lport->tt.rport_logoff(lport->ptp_rdata);
944 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
945 lport->ptp_rdata = NULL;
948 lport->tt.disc_stop(lport);
950 lport->tt.exch_mgr_reset(lport, 0, 0);
951 fc_host_fabric_name(lport->host) = 0;
953 if (fc_host_port_id(lport->host))
954 fc_lport_set_port_id(lport, 0, NULL);
958 * fc_lport_enter_reset() - Reset the local port
959 * @lport: The local port to be reset
961 * Locking Note: The lport lock is expected to be held before calling
964 static void fc_lport_enter_reset(struct fc_lport *lport)
966 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
967 fc_lport_state(lport));
969 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
974 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
976 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
978 fc_lport_state_enter(lport, LPORT_ST_RESET);
979 fc_vports_linkchange(lport);
980 fc_lport_reset_locked(lport);
982 fc_lport_enter_flogi(lport);
986 * fc_lport_enter_disabled() - Disable the local port
987 * @lport: The local port to be reset
989 * Locking Note: The lport lock is expected to be held before calling
992 static void fc_lport_enter_disabled(struct fc_lport *lport)
994 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
995 fc_lport_state(lport));
997 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
998 fc_vports_linkchange(lport);
999 fc_lport_reset_locked(lport);
1003 * fc_lport_error() - Handler for any errors
1004 * @lport: The local port that the error was on
1005 * @fp: The error code encoded in a frame pointer
1007 * If the error was caused by a resource allocation failure
1008 * then wait for half a second and retry, otherwise retry
1009 * after the e_d_tov time.
1011 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1013 unsigned long delay = 0;
1014 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1015 PTR_ERR(fp), fc_lport_state(lport),
1016 lport->retry_count);
1018 if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
1020 * Memory allocation failure, or the exchange timed out.
1023 if (lport->retry_count < lport->max_retry_count) {
1024 lport->retry_count++;
1026 delay = msecs_to_jiffies(500);
1028 delay = msecs_to_jiffies(lport->e_d_tov);
1030 schedule_delayed_work(&lport->retry_work, delay);
1032 switch (lport->state) {
1033 case LPORT_ST_DISABLED:
1034 case LPORT_ST_READY:
1035 case LPORT_ST_RESET:
1036 case LPORT_ST_RNN_ID:
1037 case LPORT_ST_RSNN_NN:
1038 case LPORT_ST_RSPN_ID:
1039 case LPORT_ST_RFT_ID:
1040 case LPORT_ST_RFF_ID:
1043 case LPORT_ST_FLOGI:
1045 fc_lport_enter_reset(lport);
1053 * fc_lport_ns_resp() - Handle response to a name server
1054 * registration exchange
1055 * @sp: current sequence in exchange
1056 * @fp: response frame
1057 * @lp_arg: Fibre Channel host port instance
1059 * Locking Note: This function will be called without the lport lock
1060 * held, but it will lock, call an _enter_* function or fc_lport_error()
1061 * and then unlock the lport.
1063 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1066 struct fc_lport *lport = lp_arg;
1067 struct fc_frame_header *fh;
1068 struct fc_ct_hdr *ct;
1070 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1072 if (fp == ERR_PTR(-FC_EX_CLOSED))
1075 mutex_lock(&lport->lp_mutex);
1077 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1078 FC_LPORT_DBG(lport, "Received a name server response, "
1079 "but in state %s\n", fc_lport_state(lport));
1086 fc_lport_error(lport, fp);
1090 fh = fc_frame_header_get(fp);
1091 ct = fc_frame_payload_get(fp, sizeof(*ct));
1093 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1094 ct->ct_fs_type == FC_FST_DIR &&
1095 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1096 ntohs(ct->ct_cmd) == FC_FS_ACC)
1097 switch (lport->state) {
1098 case LPORT_ST_RNN_ID:
1099 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1101 case LPORT_ST_RSNN_NN:
1102 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1104 case LPORT_ST_RSPN_ID:
1105 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1107 case LPORT_ST_RFT_ID:
1108 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1110 case LPORT_ST_RFF_ID:
1111 fc_lport_enter_scr(lport);
1114 /* should have already been caught by state checks */
1118 fc_lport_error(lport, fp);
1122 mutex_unlock(&lport->lp_mutex);
1126 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1127 * @sp: current sequence in SCR exchange
1128 * @fp: response frame
1129 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1131 * Locking Note: This function will be called without the lport lock
1132 * held, but it will lock, call an _enter_* function or fc_lport_error
1133 * and then unlock the lport.
1135 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1138 struct fc_lport *lport = lp_arg;
1141 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1143 if (fp == ERR_PTR(-FC_EX_CLOSED))
1146 mutex_lock(&lport->lp_mutex);
1148 if (lport->state != LPORT_ST_SCR) {
1149 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1150 "%s\n", fc_lport_state(lport));
1157 fc_lport_error(lport, fp);
1161 op = fc_frame_payload_op(fp);
1162 if (op == ELS_LS_ACC)
1163 fc_lport_enter_ready(lport);
1165 fc_lport_error(lport, fp);
1170 mutex_unlock(&lport->lp_mutex);
1174 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1175 * @lport: The local port to register for state changes
1177 * Locking Note: The lport lock is expected to be held before calling
1180 static void fc_lport_enter_scr(struct fc_lport *lport)
1182 struct fc_frame *fp;
1184 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1185 fc_lport_state(lport));
1187 fc_lport_state_enter(lport, LPORT_ST_SCR);
1189 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1191 fc_lport_error(lport, fp);
1195 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1196 fc_lport_scr_resp, lport,
1197 2 * lport->r_a_tov))
1198 fc_lport_error(lport, NULL);
1202 * fc_lport_enter_ns() - register some object with the name server
1203 * @lport: Fibre Channel local port to register
1205 * Locking Note: The lport lock is expected to be held before calling
1208 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1210 struct fc_frame *fp;
1212 int size = sizeof(struct fc_ct_hdr);
1215 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1216 fc_lport_state_names[state],
1217 fc_lport_state(lport));
1219 fc_lport_state_enter(lport, state);
1222 case LPORT_ST_RNN_ID:
1224 size += sizeof(struct fc_ns_rn_id);
1226 case LPORT_ST_RSNN_NN:
1227 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1228 /* if there is no symbolic name, skip to RFT_ID */
1230 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1231 cmd = FC_NS_RSNN_NN;
1232 size += sizeof(struct fc_ns_rsnn) + len;
1234 case LPORT_ST_RSPN_ID:
1235 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1236 /* if there is no symbolic name, skip to RFT_ID */
1238 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1239 cmd = FC_NS_RSPN_ID;
1240 size += sizeof(struct fc_ns_rspn) + len;
1242 case LPORT_ST_RFT_ID:
1244 size += sizeof(struct fc_ns_rft);
1246 case LPORT_ST_RFF_ID:
1248 size += sizeof(struct fc_ns_rff_id);
1251 fc_lport_error(lport, NULL);
1255 fp = fc_frame_alloc(lport, size);
1257 fc_lport_error(lport, fp);
1261 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1263 lport, 3 * lport->r_a_tov))
1264 fc_lport_error(lport, fp);
1267 static struct fc_rport_operations fc_lport_rport_ops = {
1268 .event_callback = fc_lport_rport_callback,
1272 * fc_rport_enter_dns() - Create a fc_rport for the name server
1273 * @lport: The local port requesting a remote port for the name server
1275 * Locking Note: The lport lock is expected to be held before calling
1278 static void fc_lport_enter_dns(struct fc_lport *lport)
1280 struct fc_rport_priv *rdata;
1282 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1283 fc_lport_state(lport));
1285 fc_lport_state_enter(lport, LPORT_ST_DNS);
1287 mutex_lock(&lport->disc.disc_mutex);
1288 rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1289 mutex_unlock(&lport->disc.disc_mutex);
1293 rdata->ops = &fc_lport_rport_ops;
1294 lport->tt.rport_login(rdata);
1298 fc_lport_error(lport, NULL);
1302 * fc_lport_timeout() - Handler for the retry_work timer
1303 * @work: The work struct of the local port
1305 static void fc_lport_timeout(struct work_struct *work)
1307 struct fc_lport *lport =
1308 container_of(work, struct fc_lport,
1311 mutex_lock(&lport->lp_mutex);
1313 switch (lport->state) {
1314 case LPORT_ST_DISABLED:
1317 case LPORT_ST_READY:
1320 case LPORT_ST_RESET:
1322 case LPORT_ST_FLOGI:
1323 fc_lport_enter_flogi(lport);
1326 fc_lport_enter_dns(lport);
1328 case LPORT_ST_RNN_ID:
1329 case LPORT_ST_RSNN_NN:
1330 case LPORT_ST_RSPN_ID:
1331 case LPORT_ST_RFT_ID:
1332 case LPORT_ST_RFF_ID:
1333 fc_lport_enter_ns(lport, lport->state);
1336 fc_lport_enter_scr(lport);
1339 fc_lport_enter_logo(lport);
1343 mutex_unlock(&lport->lp_mutex);
1347 * fc_lport_logo_resp() - Handle response to LOGO request
1348 * @sp: The sequence that the LOGO was on
1349 * @fp: The LOGO frame
1350 * @lp_arg: The lport port that received the LOGO request
1352 * Locking Note: This function will be called without the lport lock
1353 * held, but it will lock, call an _enter_* function or fc_lport_error()
1354 * and then unlock the lport.
1356 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1359 struct fc_lport *lport = lp_arg;
1362 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1364 if (fp == ERR_PTR(-FC_EX_CLOSED))
1367 mutex_lock(&lport->lp_mutex);
1369 if (lport->state != LPORT_ST_LOGO) {
1370 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1371 "%s\n", fc_lport_state(lport));
1378 fc_lport_error(lport, fp);
1382 op = fc_frame_payload_op(fp);
1383 if (op == ELS_LS_ACC)
1384 fc_lport_enter_disabled(lport);
1386 fc_lport_error(lport, fp);
1391 mutex_unlock(&lport->lp_mutex);
1393 EXPORT_SYMBOL(fc_lport_logo_resp);
1396 * fc_rport_enter_logo() - Logout of the fabric
1397 * @lport: The local port to be logged out
1399 * Locking Note: The lport lock is expected to be held before calling
1402 static void fc_lport_enter_logo(struct fc_lport *lport)
1404 struct fc_frame *fp;
1405 struct fc_els_logo *logo;
1407 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1408 fc_lport_state(lport));
1410 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1411 fc_vports_linkchange(lport);
1413 fp = fc_frame_alloc(lport, sizeof(*logo));
1415 fc_lport_error(lport, fp);
1419 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1420 fc_lport_logo_resp, lport,
1421 2 * lport->r_a_tov))
1422 fc_lport_error(lport, NULL);
1426 * fc_lport_flogi_resp() - Handle response to FLOGI request
1427 * @sp: The sequence that the FLOGI was on
1428 * @fp: The FLOGI response frame
1429 * @lp_arg: The lport port that received the FLOGI response
1431 * Locking Note: This function will be called without the lport lock
1432 * held, but it will lock, call an _enter_* function or fc_lport_error()
1433 * and then unlock the lport.
1435 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1438 struct fc_lport *lport = lp_arg;
1439 struct fc_frame_header *fh;
1440 struct fc_els_flogi *flp;
1443 unsigned int r_a_tov;
1444 unsigned int e_d_tov;
1447 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1449 if (fp == ERR_PTR(-FC_EX_CLOSED))
1452 mutex_lock(&lport->lp_mutex);
1454 if (lport->state != LPORT_ST_FLOGI) {
1455 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1456 "%s\n", fc_lport_state(lport));
1463 fc_lport_error(lport, fp);
1467 fh = fc_frame_header_get(fp);
1468 did = ntoh24(fh->fh_d_id);
1469 if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
1470 flp = fc_frame_payload_get(fp, sizeof(*flp));
1472 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1474 if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
1477 csp_flags = ntohs(flp->fl_csp.sp_features);
1478 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1479 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1480 if (csp_flags & FC_SP_FT_EDTR)
1483 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1485 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1486 if (e_d_tov > lport->e_d_tov)
1487 lport->e_d_tov = e_d_tov;
1488 lport->r_a_tov = 2 * e_d_tov;
1489 fc_lport_set_port_id(lport, did, fp);
1490 printk(KERN_INFO "host%d: libfc: "
1491 "Port (%6.6x) entered "
1492 "point-to-point mode\n",
1493 lport->host->host_no, did);
1494 fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id),
1500 lport->e_d_tov = e_d_tov;
1501 lport->r_a_tov = r_a_tov;
1502 fc_host_fabric_name(lport->host) =
1503 get_unaligned_be64(&flp->fl_wwnn);
1504 fc_lport_set_port_id(lport, did, fp);
1505 fc_lport_enter_dns(lport);
1509 FC_LPORT_DBG(lport, "Bad FLOGI response\n");
1515 mutex_unlock(&lport->lp_mutex);
1517 EXPORT_SYMBOL(fc_lport_flogi_resp);
1520 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1521 * @lport: Fibre Channel local port to be logged in to the fabric
1523 * Locking Note: The lport lock is expected to be held before calling
1526 void fc_lport_enter_flogi(struct fc_lport *lport)
1528 struct fc_frame *fp;
1530 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1531 fc_lport_state(lport));
1533 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1535 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1537 return fc_lport_error(lport, fp);
1539 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1540 lport->vport ? ELS_FDISC : ELS_FLOGI,
1541 fc_lport_flogi_resp, lport,
1542 lport->vport ? 2 * lport->r_a_tov :
1544 fc_lport_error(lport, NULL);
1548 * fc_lport_config() - Configure a fc_lport
1549 * @lport: The local port to be configured
1551 int fc_lport_config(struct fc_lport *lport)
1553 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1554 mutex_init(&lport->lp_mutex);
1556 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1558 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1559 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1563 EXPORT_SYMBOL(fc_lport_config);
1566 * fc_lport_init() - Initialize the lport layer for a local port
1567 * @lport: The local port to initialize the exchange layer for
1569 int fc_lport_init(struct fc_lport *lport)
1571 if (!lport->tt.lport_recv)
1572 lport->tt.lport_recv = fc_lport_recv_req;
1574 if (!lport->tt.lport_reset)
1575 lport->tt.lport_reset = fc_lport_reset;
1577 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1578 fc_host_node_name(lport->host) = lport->wwnn;
1579 fc_host_port_name(lport->host) = lport->wwpn;
1580 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1581 memset(fc_host_supported_fc4s(lport->host), 0,
1582 sizeof(fc_host_supported_fc4s(lport->host)));
1583 fc_host_supported_fc4s(lport->host)[2] = 1;
1584 fc_host_supported_fc4s(lport->host)[7] = 1;
1586 /* This value is also unchanging */
1587 memset(fc_host_active_fc4s(lport->host), 0,
1588 sizeof(fc_host_active_fc4s(lport->host)));
1589 fc_host_active_fc4s(lport->host)[2] = 1;
1590 fc_host_active_fc4s(lport->host)[7] = 1;
1591 fc_host_maxframe_size(lport->host) = lport->mfs;
1592 fc_host_supported_speeds(lport->host) = 0;
1593 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1594 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1595 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1596 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1600 EXPORT_SYMBOL(fc_lport_init);
1603 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1604 * @sp: The sequence for the FC Passthrough response
1605 * @fp: The response frame
1606 * @info_arg: The BSG info that the response is for
1608 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1611 struct fc_bsg_info *info = info_arg;
1612 struct fc_bsg_job *job = info->job;
1613 struct fc_lport *lport = info->lport;
1614 struct fc_frame_header *fh;
1619 job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1620 -ECONNABORTED : -ETIMEDOUT;
1621 job->reply_len = sizeof(uint32_t);
1622 job->state_flags |= FC_RQST_STATE_DONE;
1628 mutex_lock(&lport->lp_mutex);
1629 fh = fc_frame_header_get(fp);
1630 len = fr_len(fp) - sizeof(*fh);
1631 buf = fc_frame_payload_get(fp, 0);
1633 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1634 /* Get the response code from the first frame payload */
1635 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1636 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1637 (unsigned short)fc_frame_payload_op(fp);
1639 /* Save the reply status of the job */
1640 job->reply->reply_data.ctels_reply.status =
1641 (cmd == info->rsp_code) ?
1642 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1645 job->reply->reply_payload_rcv_len +=
1646 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1647 &info->offset, KM_BIO_SRC_IRQ, NULL);
1649 if (fr_eof(fp) == FC_EOF_T &&
1650 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1651 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1652 if (job->reply->reply_payload_rcv_len >
1653 job->reply_payload.payload_len)
1654 job->reply->reply_payload_rcv_len =
1655 job->reply_payload.payload_len;
1656 job->reply->result = 0;
1657 job->state_flags |= FC_RQST_STATE_DONE;
1662 mutex_unlock(&lport->lp_mutex);
1666 * fc_lport_els_request() - Send ELS passthrough request
1667 * @job: The BSG Passthrough job
1668 * @lport: The local port sending the request
1669 * @did: The destination port id
1671 * Locking Note: The lport lock is expected to be held before calling
1674 static int fc_lport_els_request(struct fc_bsg_job *job,
1675 struct fc_lport *lport,
1678 struct fc_bsg_info *info;
1679 struct fc_frame *fp;
1680 struct fc_frame_header *fh;
1684 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1688 len = job->request_payload.payload_len;
1689 pp = fc_frame_payload_get(fp, len);
1691 sg_copy_to_buffer(job->request_payload.sg_list,
1692 job->request_payload.sg_cnt,
1695 fh = fc_frame_header_get(fp);
1696 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1697 hton24(fh->fh_d_id, did);
1698 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1699 fh->fh_type = FC_TYPE_ELS;
1700 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1701 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1704 fh->fh_parm_offset = 0;
1706 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1713 info->lport = lport;
1714 info->rsp_code = ELS_LS_ACC;
1715 info->nents = job->reply_payload.sg_cnt;
1716 info->sg = job->reply_payload.sg_list;
1718 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1725 * fc_lport_ct_request() - Send CT Passthrough request
1726 * @job: The BSG Passthrough job
1727 * @lport: The local port sending the request
1728 * @did: The destination FC-ID
1729 * @tov: The timeout period to wait for the response
1731 * Locking Note: The lport lock is expected to be held before calling
1734 static int fc_lport_ct_request(struct fc_bsg_job *job,
1735 struct fc_lport *lport, u32 did, u32 tov)
1737 struct fc_bsg_info *info;
1738 struct fc_frame *fp;
1739 struct fc_frame_header *fh;
1740 struct fc_ct_req *ct;
1743 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
1744 job->request_payload.payload_len);
1748 len = job->request_payload.payload_len;
1749 ct = fc_frame_payload_get(fp, len);
1751 sg_copy_to_buffer(job->request_payload.sg_list,
1752 job->request_payload.sg_cnt,
1755 fh = fc_frame_header_get(fp);
1756 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
1757 hton24(fh->fh_d_id, did);
1758 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1759 fh->fh_type = FC_TYPE_CT;
1760 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1761 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1764 fh->fh_parm_offset = 0;
1766 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1773 info->lport = lport;
1774 info->rsp_code = FC_FS_ACC;
1775 info->nents = job->reply_payload.sg_cnt;
1776 info->sg = job->reply_payload.sg_list;
1778 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1785 * fc_lport_bsg_request() - The common entry point for sending
1786 * FC Passthrough requests
1787 * @job: The BSG passthrough job
1789 int fc_lport_bsg_request(struct fc_bsg_job *job)
1791 struct request *rsp = job->req->next_rq;
1792 struct Scsi_Host *shost = job->shost;
1793 struct fc_lport *lport = shost_priv(shost);
1794 struct fc_rport *rport;
1795 struct fc_rport_priv *rdata;
1799 job->reply->reply_payload_rcv_len = 0;
1801 rsp->resid_len = job->reply_payload.payload_len;
1803 mutex_lock(&lport->lp_mutex);
1805 switch (job->request->msgcode) {
1806 case FC_BSG_RPT_ELS:
1811 rdata = rport->dd_data;
1812 rc = fc_lport_els_request(job, lport, rport->port_id,
1821 rdata = rport->dd_data;
1822 rc = fc_lport_ct_request(job, lport, rport->port_id,
1827 did = ntoh24(job->request->rqst_data.h_ct.port_id);
1828 if (did == FC_FID_DIR_SERV)
1829 rdata = lport->dns_rdata;
1831 rdata = lport->tt.rport_lookup(lport, did);
1836 rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
1839 case FC_BSG_HST_ELS_NOLOGIN:
1840 did = ntoh24(job->request->rqst_data.h_els.port_id);
1841 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
1845 mutex_unlock(&lport->lp_mutex);
1848 EXPORT_SYMBOL(fc_lport_bsg_request);