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 (%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 (%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_type() - Return the port type of the given Scsi_Host
248 * @shost: The SCSI host whose port type is to be determined
250 void fc_get_host_port_type(struct Scsi_Host *shost)
252 /* TODO - currently just NPORT */
253 fc_host_port_type(shost) = FC_PORTTYPE_NPORT;
255 EXPORT_SYMBOL(fc_get_host_port_type);
258 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
259 * @shost: The SCSI host whose port state is to be determined
261 void fc_get_host_port_state(struct Scsi_Host *shost)
263 struct fc_lport *lport = shost_priv(shost);
265 mutex_lock(&lport->lp_mutex);
267 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
269 switch (lport->state) {
271 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
274 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
276 mutex_unlock(&lport->lp_mutex);
278 EXPORT_SYMBOL(fc_get_host_port_state);
281 * fc_get_host_speed() - Return the speed of the given Scsi_Host
282 * @shost: The SCSI host whose port speed is to be determined
284 void fc_get_host_speed(struct Scsi_Host *shost)
286 struct fc_lport *lport = shost_priv(shost);
288 fc_host_speed(shost) = lport->link_speed;
290 EXPORT_SYMBOL(fc_get_host_speed);
293 * fc_get_host_stats() - Return the Scsi_Host's statistics
294 * @shost: The SCSI host whose statistics are to be returned
296 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
298 struct fc_host_statistics *fcoe_stats;
299 struct fc_lport *lport = shost_priv(shost);
300 struct timespec v0, v1;
303 fcoe_stats = &lport->host_stats;
304 memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
306 jiffies_to_timespec(jiffies, &v0);
307 jiffies_to_timespec(lport->boot_time, &v1);
308 fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
310 for_each_possible_cpu(cpu) {
311 struct fcoe_dev_stats *stats;
313 stats = per_cpu_ptr(lport->dev_stats, cpu);
315 fcoe_stats->tx_frames += stats->TxFrames;
316 fcoe_stats->tx_words += stats->TxWords;
317 fcoe_stats->rx_frames += stats->RxFrames;
318 fcoe_stats->rx_words += stats->RxWords;
319 fcoe_stats->error_frames += stats->ErrorFrames;
320 fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
321 fcoe_stats->fcp_input_requests += stats->InputRequests;
322 fcoe_stats->fcp_output_requests += stats->OutputRequests;
323 fcoe_stats->fcp_control_requests += stats->ControlRequests;
324 fcoe_stats->fcp_input_megabytes += stats->InputMegabytes;
325 fcoe_stats->fcp_output_megabytes += stats->OutputMegabytes;
326 fcoe_stats->link_failure_count += stats->LinkFailureCount;
328 fcoe_stats->lip_count = -1;
329 fcoe_stats->nos_count = -1;
330 fcoe_stats->loss_of_sync_count = -1;
331 fcoe_stats->loss_of_signal_count = -1;
332 fcoe_stats->prim_seq_protocol_err_count = -1;
333 fcoe_stats->dumped_frames = -1;
336 EXPORT_SYMBOL(fc_get_host_stats);
339 * fc_lport_flogi_fill() - Fill in FLOGI command for request
340 * @lport: The local port the FLOGI is for
341 * @flogi: The FLOGI command
344 static void fc_lport_flogi_fill(struct fc_lport *lport,
345 struct fc_els_flogi *flogi,
348 struct fc_els_csp *sp;
349 struct fc_els_cssp *cp;
351 memset(flogi, 0, sizeof(*flogi));
352 flogi->fl_cmd = (u8) op;
353 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
354 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
356 sp->sp_hi_ver = 0x20;
357 sp->sp_lo_ver = 0x20;
358 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
359 sp->sp_bb_data = htons((u16) lport->mfs);
360 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
361 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
362 if (op != ELS_FLOGI) {
363 sp->sp_features = htons(FC_SP_FT_CIRO);
364 sp->sp_tot_seq = htons(255); /* seq. we accept */
365 sp->sp_rel_off = htons(0x1f);
366 sp->sp_e_d_tov = htonl(lport->e_d_tov);
368 cp->cp_rdfs = htons((u16) lport->mfs);
369 cp->cp_con_seq = htons(255);
375 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
376 * @lport: The local port to add a new FC-4 type to
377 * @type: The new FC-4 type
379 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
383 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
384 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
388 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
389 * @sp: The sequence in the RLIR exchange
390 * @fp: The RLIR request frame
391 * @lport: Fibre Channel local port recieving the RLIR
393 * Locking Note: The lport lock is expected to be held before calling
396 static void fc_lport_recv_rlir_req(struct fc_seq *sp, struct fc_frame *fp,
397 struct fc_lport *lport)
399 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
400 fc_lport_state(lport));
402 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
407 * fc_lport_recv_echo_req() - Handle received ECHO request
408 * @sp: The sequence in the ECHO exchange
409 * @fp: ECHO request frame
410 * @lport: The local port recieving the ECHO
412 * Locking Note: The lport lock is expected to be held before calling
415 static void fc_lport_recv_echo_req(struct fc_seq *sp, struct fc_frame *in_fp,
416 struct fc_lport *lport)
419 struct fc_exch *ep = fc_seq_exch(sp);
425 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
426 fc_lport_state(lport));
428 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
429 pp = fc_frame_payload_get(in_fp, len);
431 if (len < sizeof(__be32))
432 len = sizeof(__be32);
434 fp = fc_frame_alloc(lport, len);
436 dp = fc_frame_payload_get(fp, len);
438 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
439 sp = lport->tt.seq_start_next(sp);
440 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
441 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
442 FC_TYPE_ELS, f_ctl, 0);
443 lport->tt.seq_send(lport, sp, fp);
445 fc_frame_free(in_fp);
449 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
450 * @sp: The sequence in the RNID exchange
451 * @fp: The RNID request frame
452 * @lport: The local port recieving the RNID
454 * Locking Note: The lport lock is expected to be held before calling
457 static void fc_lport_recv_rnid_req(struct fc_seq *sp, struct fc_frame *in_fp,
458 struct fc_lport *lport)
461 struct fc_exch *ep = fc_seq_exch(sp);
462 struct fc_els_rnid *req;
464 struct fc_els_rnid_resp rnid;
465 struct fc_els_rnid_cid cid;
466 struct fc_els_rnid_gen gen;
468 struct fc_seq_els_data rjt_data;
473 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
474 fc_lport_state(lport));
476 req = fc_frame_payload_get(in_fp, sizeof(*req));
479 rjt_data.reason = ELS_RJT_LOGIC;
480 rjt_data.explan = ELS_EXPL_NONE;
481 lport->tt.seq_els_rsp_send(sp, ELS_LS_RJT, &rjt_data);
485 if (fmt != ELS_RNIDF_GEN ||
486 ntohl(lport->rnid_gen.rnid_atype) == 0) {
487 fmt = ELS_RNIDF_NONE; /* nothing to provide */
488 len -= sizeof(rp->gen);
490 fp = fc_frame_alloc(lport, len);
492 rp = fc_frame_payload_get(fp, len);
494 rp->rnid.rnid_cmd = ELS_LS_ACC;
495 rp->rnid.rnid_fmt = fmt;
496 rp->rnid.rnid_cid_len = sizeof(rp->cid);
497 rp->cid.rnid_wwpn = htonll(lport->wwpn);
498 rp->cid.rnid_wwnn = htonll(lport->wwnn);
499 if (fmt == ELS_RNIDF_GEN) {
500 rp->rnid.rnid_sid_len = sizeof(rp->gen);
501 memcpy(&rp->gen, &lport->rnid_gen,
504 sp = lport->tt.seq_start_next(sp);
505 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ;
506 f_ctl |= FC_FC_END_SEQ | FC_FC_SEQ_INIT;
507 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, ep->did, ep->sid,
508 FC_TYPE_ELS, f_ctl, 0);
509 lport->tt.seq_send(lport, sp, fp);
512 fc_frame_free(in_fp);
516 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
517 * @sp: The sequence in the LOGO exchange
518 * @fp: The LOGO request frame
519 * @lport: The local port recieving the LOGO
521 * Locking Note: The lport lock is exected to be held before calling
524 static void fc_lport_recv_logo_req(struct fc_seq *sp, struct fc_frame *fp,
525 struct fc_lport *lport)
527 lport->tt.seq_els_rsp_send(sp, ELS_LS_ACC, NULL);
528 fc_lport_enter_reset(lport);
533 * fc_fabric_login() - Start the lport state machine
534 * @lport: The local port that should log into the fabric
536 * Locking Note: This function should not be called
537 * with the lport lock held.
539 int fc_fabric_login(struct fc_lport *lport)
543 mutex_lock(&lport->lp_mutex);
544 if (lport->state == LPORT_ST_DISABLED ||
545 lport->state == LPORT_ST_LOGO) {
546 fc_lport_state_enter(lport, LPORT_ST_RESET);
547 fc_lport_enter_reset(lport);
550 mutex_unlock(&lport->lp_mutex);
554 EXPORT_SYMBOL(fc_fabric_login);
557 * __fc_linkup() - Handler for transport linkup events
558 * @lport: The lport whose link is up
560 * Locking: must be called with the lp_mutex held
562 void __fc_linkup(struct fc_lport *lport)
564 if (!lport->link_up) {
567 if (lport->state == LPORT_ST_RESET)
568 fc_lport_enter_flogi(lport);
573 * fc_linkup() - Handler for transport linkup events
574 * @lport: The local port whose link is up
576 void fc_linkup(struct fc_lport *lport)
578 printk(KERN_INFO "host%d: libfc: Link up on port (%6x)\n",
579 lport->host->host_no, fc_host_port_id(lport->host));
581 mutex_lock(&lport->lp_mutex);
583 mutex_unlock(&lport->lp_mutex);
585 EXPORT_SYMBOL(fc_linkup);
588 * __fc_linkdown() - Handler for transport linkdown events
589 * @lport: The lport whose link is down
591 * Locking: must be called with the lp_mutex held
593 void __fc_linkdown(struct fc_lport *lport)
595 if (lport->link_up) {
597 fc_lport_enter_reset(lport);
598 lport->tt.fcp_cleanup(lport);
603 * fc_linkdown() - Handler for transport linkdown events
604 * @lport: The local port whose link is down
606 void fc_linkdown(struct fc_lport *lport)
608 printk(KERN_INFO "host%d: libfc: Link down on port (%6x)\n",
609 lport->host->host_no, fc_host_port_id(lport->host));
611 mutex_lock(&lport->lp_mutex);
612 __fc_linkdown(lport);
613 mutex_unlock(&lport->lp_mutex);
615 EXPORT_SYMBOL(fc_linkdown);
618 * fc_fabric_logoff() - Logout of the fabric
619 * @lport: The local port to logoff the fabric
622 * 0 for success, -1 for failure
624 int fc_fabric_logoff(struct fc_lport *lport)
626 lport->tt.disc_stop_final(lport);
627 mutex_lock(&lport->lp_mutex);
628 if (lport->dns_rdata)
629 lport->tt.rport_logoff(lport->dns_rdata);
630 mutex_unlock(&lport->lp_mutex);
631 lport->tt.rport_flush_queue();
632 mutex_lock(&lport->lp_mutex);
633 fc_lport_enter_logo(lport);
634 mutex_unlock(&lport->lp_mutex);
635 cancel_delayed_work_sync(&lport->retry_work);
638 EXPORT_SYMBOL(fc_fabric_logoff);
641 * fc_lport_destroy() - Unregister a fc_lport
642 * @lport: The local port to unregister
645 * exit routine for fc_lport instance
646 * clean-up all the allocated memory
647 * and free up other system resources.
650 int fc_lport_destroy(struct fc_lport *lport)
652 mutex_lock(&lport->lp_mutex);
653 lport->state = LPORT_ST_DISABLED;
655 lport->tt.frame_send = fc_frame_drop;
656 mutex_unlock(&lport->lp_mutex);
658 lport->tt.fcp_abort_io(lport);
659 lport->tt.disc_stop_final(lport);
660 lport->tt.exch_mgr_reset(lport, 0, 0);
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 void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
705 case DISC_EV_SUCCESS:
706 FC_LPORT_DBG(lport, "Discovery succeeded\n");
709 printk(KERN_ERR "host%d: libfc: "
710 "Discovery failed for port (%6x)\n",
711 lport->host->host_no, fc_host_port_id(lport->host));
712 mutex_lock(&lport->lp_mutex);
713 fc_lport_enter_reset(lport);
714 mutex_unlock(&lport->lp_mutex);
723 * fc_rport_enter_ready() - Enter the ready state and start discovery
724 * @lport: The local port that is ready
726 * Locking Note: The lport lock is expected to be held before calling
729 static void fc_lport_enter_ready(struct fc_lport *lport)
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 * Locking Note: The lport lock is expected to be held before calling
752 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
756 printk(KERN_INFO "host%d: Assigned Port ID %6x\n",
757 lport->host->host_no, port_id);
759 fc_host_port_id(lport->host) = port_id;
760 if (lport->tt.lport_set_port_id)
761 lport->tt.lport_set_port_id(lport, port_id, fp);
765 * fc_lport_recv_flogi_req() - Receive a FLOGI request
766 * @sp_in: The sequence the FLOGI is on
767 * @rx_fp: The FLOGI frame
768 * @lport: The local port that recieved the request
770 * A received FLOGI request indicates a point-to-point connection.
771 * Accept it with the common service parameters indicating our N port.
772 * Set up to do a PLOGI if we have the higher-number WWPN.
774 * Locking Note: The lport lock is expected to be held before calling
777 static void fc_lport_recv_flogi_req(struct fc_seq *sp_in,
778 struct fc_frame *rx_fp,
779 struct fc_lport *lport)
782 struct fc_frame_header *fh;
785 struct fc_els_flogi *flp;
786 struct fc_els_flogi *new_flp;
792 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
793 fc_lport_state(lport));
795 fh = fc_frame_header_get(rx_fp);
796 remote_fid = ntoh24(fh->fh_s_id);
797 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
800 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
801 if (remote_wwpn == lport->wwpn) {
802 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
803 "with same WWPN %llx\n",
804 lport->host->host_no, remote_wwpn);
807 FC_LPORT_DBG(lport, "FLOGI from port WWPN %llx\n", remote_wwpn);
810 * XXX what is the right thing to do for FIDs?
811 * The originator might expect our S_ID to be 0xfffffe.
812 * But if so, both of us could end up with the same FID.
814 local_fid = FC_LOCAL_PTP_FID_LO;
815 if (remote_wwpn < lport->wwpn) {
816 local_fid = FC_LOCAL_PTP_FID_HI;
817 if (!remote_fid || remote_fid == local_fid)
818 remote_fid = FC_LOCAL_PTP_FID_LO;
819 } else if (!remote_fid) {
820 remote_fid = FC_LOCAL_PTP_FID_HI;
823 fc_lport_set_port_id(lport, local_fid, rx_fp);
825 fp = fc_frame_alloc(lport, sizeof(*flp));
827 sp = lport->tt.seq_start_next(fr_seq(rx_fp));
828 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
829 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
830 new_flp->fl_cmd = (u8) ELS_LS_ACC;
833 * Send the response. If this fails, the originator should
834 * repeat the sequence.
836 f_ctl = FC_FC_EX_CTX | FC_FC_LAST_SEQ | FC_FC_END_SEQ;
837 ep = fc_seq_exch(sp);
838 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REP, remote_fid, local_fid,
839 FC_TYPE_ELS, f_ctl, 0);
840 lport->tt.seq_send(lport, sp, fp);
843 fc_lport_error(lport, fp);
845 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
846 get_unaligned_be64(&flp->fl_wwnn));
850 fc_frame_free(rx_fp);
854 * fc_lport_recv_req() - The generic lport request handler
855 * @lport: The local port that received the request
856 * @sp: The sequence the request is on
857 * @fp: The request frame
859 * This function will see if the lport handles the request or
860 * if an rport should handle the request.
862 * Locking Note: This function should not be called with the lport
863 * lock held becuase it will grab the lock.
865 static void fc_lport_recv_req(struct fc_lport *lport, struct fc_seq *sp,
868 struct fc_frame_header *fh = fc_frame_header_get(fp);
869 void (*recv) (struct fc_seq *, struct fc_frame *, struct fc_lport *);
871 mutex_lock(&lport->lp_mutex);
874 * Handle special ELS cases like FLOGI, LOGO, and
875 * RSCN here. These don't require a session.
876 * Even if we had a session, it might not be ready.
880 else if (fh->fh_type == FC_TYPE_ELS &&
881 fh->fh_r_ctl == FC_RCTL_ELS_REQ) {
885 recv = lport->tt.rport_recv_req;
886 switch (fc_frame_payload_op(fp)) {
888 recv = fc_lport_recv_flogi_req;
891 fh = fc_frame_header_get(fp);
892 if (ntoh24(fh->fh_s_id) == FC_FID_FLOGI)
893 recv = fc_lport_recv_logo_req;
896 recv = lport->tt.disc_recv_req;
899 recv = fc_lport_recv_echo_req;
902 recv = fc_lport_recv_rlir_req;
905 recv = fc_lport_recv_rnid_req;
911 FC_LPORT_DBG(lport, "dropping invalid frame (eof %x)\n",
915 mutex_unlock(&lport->lp_mutex);
918 * The common exch_done for all request may not be good
919 * if any request requires longer hold on exhange. XXX
921 lport->tt.exch_done(sp);
925 * fc_lport_reset() - Reset a local port
926 * @lport: The local port which should be reset
928 * Locking Note: This functions should not be called with the
931 int fc_lport_reset(struct fc_lport *lport)
933 cancel_delayed_work_sync(&lport->retry_work);
934 mutex_lock(&lport->lp_mutex);
935 fc_lport_enter_reset(lport);
936 mutex_unlock(&lport->lp_mutex);
939 EXPORT_SYMBOL(fc_lport_reset);
942 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
943 * @lport: The local port to be reset
945 * Locking Note: The lport lock is expected to be held before calling
948 static void fc_lport_reset_locked(struct fc_lport *lport)
950 if (lport->dns_rdata)
951 lport->tt.rport_logoff(lport->dns_rdata);
953 if (lport->ptp_rdata) {
954 lport->tt.rport_logoff(lport->ptp_rdata);
955 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
956 lport->ptp_rdata = NULL;
959 lport->tt.disc_stop(lport);
961 lport->tt.exch_mgr_reset(lport, 0, 0);
962 fc_host_fabric_name(lport->host) = 0;
964 if (fc_host_port_id(lport->host))
965 fc_lport_set_port_id(lport, 0, NULL);
969 * fc_lport_enter_reset() - Reset the local port
970 * @lport: The local port to be reset
972 * Locking Note: The lport lock is expected to be held before calling
975 static void fc_lport_enter_reset(struct fc_lport *lport)
977 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
978 fc_lport_state(lport));
980 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
985 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
987 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
989 fc_lport_state_enter(lport, LPORT_ST_RESET);
990 fc_vports_linkchange(lport);
991 fc_lport_reset_locked(lport);
993 fc_lport_enter_flogi(lport);
997 * fc_lport_enter_disabled() - Disable the local port
998 * @lport: The local port to be reset
1000 * Locking Note: The lport lock is expected to be held before calling
1003 static void fc_lport_enter_disabled(struct fc_lport *lport)
1005 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1006 fc_lport_state(lport));
1008 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1009 fc_vports_linkchange(lport);
1010 fc_lport_reset_locked(lport);
1014 * fc_lport_error() - Handler for any errors
1015 * @lport: The local port that the error was on
1016 * @fp: The error code encoded in a frame pointer
1018 * If the error was caused by a resource allocation failure
1019 * then wait for half a second and retry, otherwise retry
1020 * after the e_d_tov time.
1022 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1024 unsigned long delay = 0;
1025 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1026 PTR_ERR(fp), fc_lport_state(lport),
1027 lport->retry_count);
1029 if (!fp || PTR_ERR(fp) == -FC_EX_TIMEOUT) {
1031 * Memory allocation failure, or the exchange timed out.
1034 if (lport->retry_count < lport->max_retry_count) {
1035 lport->retry_count++;
1037 delay = msecs_to_jiffies(500);
1039 delay = msecs_to_jiffies(lport->e_d_tov);
1041 schedule_delayed_work(&lport->retry_work, delay);
1043 switch (lport->state) {
1044 case LPORT_ST_DISABLED:
1045 case LPORT_ST_READY:
1046 case LPORT_ST_RESET:
1047 case LPORT_ST_RNN_ID:
1048 case LPORT_ST_RSNN_NN:
1049 case LPORT_ST_RSPN_ID:
1050 case LPORT_ST_RFT_ID:
1051 case LPORT_ST_RFF_ID:
1054 case LPORT_ST_FLOGI:
1056 fc_lport_enter_reset(lport);
1064 * fc_lport_ns_resp() - Handle response to a name server
1065 * registration exchange
1066 * @sp: current sequence in exchange
1067 * @fp: response frame
1068 * @lp_arg: Fibre Channel host port instance
1070 * Locking Note: This function will be called without the lport lock
1071 * held, but it will lock, call an _enter_* function or fc_lport_error()
1072 * and then unlock the lport.
1074 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1077 struct fc_lport *lport = lp_arg;
1078 struct fc_frame_header *fh;
1079 struct fc_ct_hdr *ct;
1081 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1083 if (fp == ERR_PTR(-FC_EX_CLOSED))
1086 mutex_lock(&lport->lp_mutex);
1088 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1089 FC_LPORT_DBG(lport, "Received a name server response, "
1090 "but in state %s\n", fc_lport_state(lport));
1097 fc_lport_error(lport, fp);
1101 fh = fc_frame_header_get(fp);
1102 ct = fc_frame_payload_get(fp, sizeof(*ct));
1104 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1105 ct->ct_fs_type == FC_FST_DIR &&
1106 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1107 ntohs(ct->ct_cmd) == FC_FS_ACC)
1108 switch (lport->state) {
1109 case LPORT_ST_RNN_ID:
1110 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1112 case LPORT_ST_RSNN_NN:
1113 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1115 case LPORT_ST_RSPN_ID:
1116 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1118 case LPORT_ST_RFT_ID:
1119 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1121 case LPORT_ST_RFF_ID:
1122 fc_lport_enter_scr(lport);
1125 /* should have already been caught by state checks */
1129 fc_lport_error(lport, fp);
1133 mutex_unlock(&lport->lp_mutex);
1137 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1138 * @sp: current sequence in SCR exchange
1139 * @fp: response frame
1140 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1142 * Locking Note: This function will be called without the lport lock
1143 * held, but it will lock, call an _enter_* function or fc_lport_error
1144 * and then unlock the lport.
1146 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1149 struct fc_lport *lport = lp_arg;
1152 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1154 if (fp == ERR_PTR(-FC_EX_CLOSED))
1157 mutex_lock(&lport->lp_mutex);
1159 if (lport->state != LPORT_ST_SCR) {
1160 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1161 "%s\n", fc_lport_state(lport));
1168 fc_lport_error(lport, fp);
1172 op = fc_frame_payload_op(fp);
1173 if (op == ELS_LS_ACC)
1174 fc_lport_enter_ready(lport);
1176 fc_lport_error(lport, fp);
1181 mutex_unlock(&lport->lp_mutex);
1185 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1186 * @lport: The local port to register for state changes
1188 * Locking Note: The lport lock is expected to be held before calling
1191 static void fc_lport_enter_scr(struct fc_lport *lport)
1193 struct fc_frame *fp;
1195 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1196 fc_lport_state(lport));
1198 fc_lport_state_enter(lport, LPORT_ST_SCR);
1200 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1202 fc_lport_error(lport, fp);
1206 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1207 fc_lport_scr_resp, lport,
1208 2 * lport->r_a_tov))
1209 fc_lport_error(lport, NULL);
1213 * fc_lport_enter_ns() - register some object with the name server
1214 * @lport: Fibre Channel local port to register
1216 * Locking Note: The lport lock is expected to be held before calling
1219 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1221 struct fc_frame *fp;
1223 int size = sizeof(struct fc_ct_hdr);
1226 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1227 fc_lport_state_names[state],
1228 fc_lport_state(lport));
1230 fc_lport_state_enter(lport, state);
1233 case LPORT_ST_RNN_ID:
1235 size += sizeof(struct fc_ns_rn_id);
1237 case LPORT_ST_RSNN_NN:
1238 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1239 /* if there is no symbolic name, skip to RFT_ID */
1241 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1242 cmd = FC_NS_RSNN_NN;
1243 size += sizeof(struct fc_ns_rsnn) + len;
1245 case LPORT_ST_RSPN_ID:
1246 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1247 /* if there is no symbolic name, skip to RFT_ID */
1249 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1250 cmd = FC_NS_RSPN_ID;
1251 size += sizeof(struct fc_ns_rspn) + len;
1253 case LPORT_ST_RFT_ID:
1255 size += sizeof(struct fc_ns_rft);
1257 case LPORT_ST_RFF_ID:
1259 size += sizeof(struct fc_ns_rff_id);
1262 fc_lport_error(lport, NULL);
1266 fp = fc_frame_alloc(lport, size);
1268 fc_lport_error(lport, fp);
1272 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1274 lport, 3 * lport->r_a_tov))
1275 fc_lport_error(lport, fp);
1278 static struct fc_rport_operations fc_lport_rport_ops = {
1279 .event_callback = fc_lport_rport_callback,
1283 * fc_rport_enter_dns() - Create a fc_rport for the name server
1284 * @lport: The local port requesting a remote port for the name server
1286 * Locking Note: The lport lock is expected to be held before calling
1289 static void fc_lport_enter_dns(struct fc_lport *lport)
1291 struct fc_rport_priv *rdata;
1293 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1294 fc_lport_state(lport));
1296 fc_lport_state_enter(lport, LPORT_ST_DNS);
1298 mutex_lock(&lport->disc.disc_mutex);
1299 rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1300 mutex_unlock(&lport->disc.disc_mutex);
1304 rdata->ops = &fc_lport_rport_ops;
1305 lport->tt.rport_login(rdata);
1309 fc_lport_error(lport, NULL);
1313 * fc_lport_timeout() - Handler for the retry_work timer
1314 * @work: The work struct of the local port
1316 static void fc_lport_timeout(struct work_struct *work)
1318 struct fc_lport *lport =
1319 container_of(work, struct fc_lport,
1322 mutex_lock(&lport->lp_mutex);
1324 switch (lport->state) {
1325 case LPORT_ST_DISABLED:
1328 case LPORT_ST_READY:
1331 case LPORT_ST_RESET:
1333 case LPORT_ST_FLOGI:
1334 fc_lport_enter_flogi(lport);
1337 fc_lport_enter_dns(lport);
1339 case LPORT_ST_RNN_ID:
1340 case LPORT_ST_RSNN_NN:
1341 case LPORT_ST_RSPN_ID:
1342 case LPORT_ST_RFT_ID:
1343 case LPORT_ST_RFF_ID:
1344 fc_lport_enter_ns(lport, lport->state);
1347 fc_lport_enter_scr(lport);
1350 fc_lport_enter_logo(lport);
1354 mutex_unlock(&lport->lp_mutex);
1358 * fc_lport_logo_resp() - Handle response to LOGO request
1359 * @sp: The sequence that the LOGO was on
1360 * @fp: The LOGO frame
1361 * @lp_arg: The lport port that received the LOGO request
1363 * Locking Note: This function will be called without the lport lock
1364 * held, but it will lock, call an _enter_* function or fc_lport_error()
1365 * and then unlock the lport.
1367 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1370 struct fc_lport *lport = lp_arg;
1373 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1375 if (fp == ERR_PTR(-FC_EX_CLOSED))
1378 mutex_lock(&lport->lp_mutex);
1380 if (lport->state != LPORT_ST_LOGO) {
1381 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1382 "%s\n", fc_lport_state(lport));
1389 fc_lport_error(lport, fp);
1393 op = fc_frame_payload_op(fp);
1394 if (op == ELS_LS_ACC)
1395 fc_lport_enter_disabled(lport);
1397 fc_lport_error(lport, fp);
1402 mutex_unlock(&lport->lp_mutex);
1404 EXPORT_SYMBOL(fc_lport_logo_resp);
1407 * fc_rport_enter_logo() - Logout of the fabric
1408 * @lport: The local port to be logged out
1410 * Locking Note: The lport lock is expected to be held before calling
1413 static void fc_lport_enter_logo(struct fc_lport *lport)
1415 struct fc_frame *fp;
1416 struct fc_els_logo *logo;
1418 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1419 fc_lport_state(lport));
1421 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1422 fc_vports_linkchange(lport);
1424 fp = fc_frame_alloc(lport, sizeof(*logo));
1426 fc_lport_error(lport, fp);
1430 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1431 fc_lport_logo_resp, lport,
1432 2 * lport->r_a_tov))
1433 fc_lport_error(lport, NULL);
1437 * fc_lport_flogi_resp() - Handle response to FLOGI request
1438 * @sp: The sequence that the FLOGI was on
1439 * @fp: The FLOGI response frame
1440 * @lp_arg: The lport port that received the FLOGI response
1442 * Locking Note: This function will be called without the lport lock
1443 * held, but it will lock, call an _enter_* function or fc_lport_error()
1444 * and then unlock the lport.
1446 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1449 struct fc_lport *lport = lp_arg;
1450 struct fc_frame_header *fh;
1451 struct fc_els_flogi *flp;
1454 unsigned int r_a_tov;
1455 unsigned int e_d_tov;
1458 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1460 if (fp == ERR_PTR(-FC_EX_CLOSED))
1463 mutex_lock(&lport->lp_mutex);
1465 if (lport->state != LPORT_ST_FLOGI) {
1466 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1467 "%s\n", fc_lport_state(lport));
1474 fc_lport_error(lport, fp);
1478 fh = fc_frame_header_get(fp);
1479 did = ntoh24(fh->fh_d_id);
1480 if (fc_frame_payload_op(fp) == ELS_LS_ACC && did != 0) {
1481 flp = fc_frame_payload_get(fp, sizeof(*flp));
1483 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1485 if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
1488 csp_flags = ntohs(flp->fl_csp.sp_features);
1489 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1490 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1491 if (csp_flags & FC_SP_FT_EDTR)
1494 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1496 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1497 if (e_d_tov > lport->e_d_tov)
1498 lport->e_d_tov = e_d_tov;
1499 lport->r_a_tov = 2 * e_d_tov;
1500 fc_lport_set_port_id(lport, did, fp);
1501 printk(KERN_INFO "host%d: libfc: "
1502 "Port (%6x) entered "
1503 "point-to-point mode\n",
1504 lport->host->host_no, did);
1505 fc_lport_ptp_setup(lport, ntoh24(fh->fh_s_id),
1511 lport->e_d_tov = e_d_tov;
1512 lport->r_a_tov = r_a_tov;
1513 fc_host_fabric_name(lport->host) =
1514 get_unaligned_be64(&flp->fl_wwnn);
1515 fc_lport_set_port_id(lport, did, fp);
1516 fc_lport_enter_dns(lport);
1520 FC_LPORT_DBG(lport, "Bad FLOGI response\n");
1526 mutex_unlock(&lport->lp_mutex);
1528 EXPORT_SYMBOL(fc_lport_flogi_resp);
1531 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1532 * @lport: Fibre Channel local port to be logged in to the fabric
1534 * Locking Note: The lport lock is expected to be held before calling
1537 void fc_lport_enter_flogi(struct fc_lport *lport)
1539 struct fc_frame *fp;
1541 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1542 fc_lport_state(lport));
1544 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1546 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1548 return fc_lport_error(lport, fp);
1550 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1551 lport->vport ? ELS_FDISC : ELS_FLOGI,
1552 fc_lport_flogi_resp, lport,
1553 lport->vport ? 2 * lport->r_a_tov :
1555 fc_lport_error(lport, NULL);
1559 * fc_lport_config() - Configure a fc_lport
1560 * @lport: The local port to be configured
1562 int fc_lport_config(struct fc_lport *lport)
1564 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1565 mutex_init(&lport->lp_mutex);
1567 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1569 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1570 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1574 EXPORT_SYMBOL(fc_lport_config);
1577 * fc_lport_init() - Initialize the lport layer for a local port
1578 * @lport: The local port to initialize the exchange layer for
1580 int fc_lport_init(struct fc_lport *lport)
1582 if (!lport->tt.lport_recv)
1583 lport->tt.lport_recv = fc_lport_recv_req;
1585 if (!lport->tt.lport_reset)
1586 lport->tt.lport_reset = fc_lport_reset;
1588 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1589 fc_host_node_name(lport->host) = lport->wwnn;
1590 fc_host_port_name(lport->host) = lport->wwpn;
1591 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1592 memset(fc_host_supported_fc4s(lport->host), 0,
1593 sizeof(fc_host_supported_fc4s(lport->host)));
1594 fc_host_supported_fc4s(lport->host)[2] = 1;
1595 fc_host_supported_fc4s(lport->host)[7] = 1;
1597 /* This value is also unchanging */
1598 memset(fc_host_active_fc4s(lport->host), 0,
1599 sizeof(fc_host_active_fc4s(lport->host)));
1600 fc_host_active_fc4s(lport->host)[2] = 1;
1601 fc_host_active_fc4s(lport->host)[7] = 1;
1602 fc_host_maxframe_size(lport->host) = lport->mfs;
1603 fc_host_supported_speeds(lport->host) = 0;
1604 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1605 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1606 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1607 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1611 EXPORT_SYMBOL(fc_lport_init);
1614 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1615 * @sp: The sequence for the FC Passthrough response
1616 * @fp: The response frame
1617 * @info_arg: The BSG info that the response is for
1619 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1622 struct fc_bsg_info *info = info_arg;
1623 struct fc_bsg_job *job = info->job;
1624 struct fc_lport *lport = info->lport;
1625 struct fc_frame_header *fh;
1630 job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1631 -ECONNABORTED : -ETIMEDOUT;
1632 job->reply_len = sizeof(uint32_t);
1633 job->state_flags |= FC_RQST_STATE_DONE;
1639 mutex_lock(&lport->lp_mutex);
1640 fh = fc_frame_header_get(fp);
1641 len = fr_len(fp) - sizeof(*fh);
1642 buf = fc_frame_payload_get(fp, 0);
1644 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1645 /* Get the response code from the first frame payload */
1646 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1647 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1648 (unsigned short)fc_frame_payload_op(fp);
1650 /* Save the reply status of the job */
1651 job->reply->reply_data.ctels_reply.status =
1652 (cmd == info->rsp_code) ?
1653 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1656 job->reply->reply_payload_rcv_len +=
1657 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1658 &info->offset, KM_BIO_SRC_IRQ, NULL);
1660 if (fr_eof(fp) == FC_EOF_T &&
1661 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1662 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1663 if (job->reply->reply_payload_rcv_len >
1664 job->reply_payload.payload_len)
1665 job->reply->reply_payload_rcv_len =
1666 job->reply_payload.payload_len;
1667 job->reply->result = 0;
1668 job->state_flags |= FC_RQST_STATE_DONE;
1673 mutex_unlock(&lport->lp_mutex);
1677 * fc_lport_els_request() - Send ELS passthrough request
1678 * @job: The BSG Passthrough job
1679 * @lport: The local port sending the request
1680 * @did: The destination port id
1682 * Locking Note: The lport lock is expected to be held before calling
1685 static int fc_lport_els_request(struct fc_bsg_job *job,
1686 struct fc_lport *lport,
1689 struct fc_bsg_info *info;
1690 struct fc_frame *fp;
1691 struct fc_frame_header *fh;
1695 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1699 len = job->request_payload.payload_len;
1700 pp = fc_frame_payload_get(fp, len);
1702 sg_copy_to_buffer(job->request_payload.sg_list,
1703 job->request_payload.sg_cnt,
1706 fh = fc_frame_header_get(fp);
1707 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1708 hton24(fh->fh_d_id, did);
1709 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1710 fh->fh_type = FC_TYPE_ELS;
1711 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1712 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1715 fh->fh_parm_offset = 0;
1717 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1724 info->lport = lport;
1725 info->rsp_code = ELS_LS_ACC;
1726 info->nents = job->reply_payload.sg_cnt;
1727 info->sg = job->reply_payload.sg_list;
1729 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1736 * fc_lport_ct_request() - Send CT Passthrough request
1737 * @job: The BSG Passthrough job
1738 * @lport: The local port sending the request
1739 * @did: The destination FC-ID
1740 * @tov: The timeout period to wait for the response
1742 * Locking Note: The lport lock is expected to be held before calling
1745 static int fc_lport_ct_request(struct fc_bsg_job *job,
1746 struct fc_lport *lport, u32 did, u32 tov)
1748 struct fc_bsg_info *info;
1749 struct fc_frame *fp;
1750 struct fc_frame_header *fh;
1751 struct fc_ct_req *ct;
1754 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
1755 job->request_payload.payload_len);
1759 len = job->request_payload.payload_len;
1760 ct = fc_frame_payload_get(fp, len);
1762 sg_copy_to_buffer(job->request_payload.sg_list,
1763 job->request_payload.sg_cnt,
1766 fh = fc_frame_header_get(fp);
1767 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
1768 hton24(fh->fh_d_id, did);
1769 hton24(fh->fh_s_id, fc_host_port_id(lport->host));
1770 fh->fh_type = FC_TYPE_CT;
1771 hton24(fh->fh_f_ctl, FC_FC_FIRST_SEQ |
1772 FC_FC_END_SEQ | FC_FC_SEQ_INIT);
1775 fh->fh_parm_offset = 0;
1777 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1784 info->lport = lport;
1785 info->rsp_code = FC_FS_ACC;
1786 info->nents = job->reply_payload.sg_cnt;
1787 info->sg = job->reply_payload.sg_list;
1789 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1796 * fc_lport_bsg_request() - The common entry point for sending
1797 * FC Passthrough requests
1798 * @job: The BSG passthrough job
1800 int fc_lport_bsg_request(struct fc_bsg_job *job)
1802 struct request *rsp = job->req->next_rq;
1803 struct Scsi_Host *shost = job->shost;
1804 struct fc_lport *lport = shost_priv(shost);
1805 struct fc_rport *rport;
1806 struct fc_rport_priv *rdata;
1810 job->reply->reply_payload_rcv_len = 0;
1812 rsp->resid_len = job->reply_payload.payload_len;
1814 mutex_lock(&lport->lp_mutex);
1816 switch (job->request->msgcode) {
1817 case FC_BSG_RPT_ELS:
1822 rdata = rport->dd_data;
1823 rc = fc_lport_els_request(job, lport, rport->port_id,
1832 rdata = rport->dd_data;
1833 rc = fc_lport_ct_request(job, lport, rport->port_id,
1838 did = ntoh24(job->request->rqst_data.h_ct.port_id);
1839 if (did == FC_FID_DIR_SERV)
1840 rdata = lport->dns_rdata;
1842 rdata = lport->tt.rport_lookup(lport, did);
1847 rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
1850 case FC_BSG_HST_ELS_NOLOGIN:
1851 did = ntoh24(job->request->rqst_data.h_els.port_id);
1852 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
1856 mutex_unlock(&lport->lp_mutex);
1859 EXPORT_SYMBOL(fc_lport_bsg_request);