2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
28 * The lport, disc and rport blocks all have mutexes that are used to protect
29 * those objects. The main motivation for these locks is to prevent from
30 * having an lport reset just before we send a frame. In that scenario the
31 * lport's FID would get set to zero and then we'd send a frame with an
32 * invalid SID. We also need to ensure that states don't change unexpectedly
33 * while processing another state.
37 * The following hierarchy defines the locking rules. A greater lock
38 * may be held before acquiring a lesser lock, but a lesser lock should never
39 * be held while attempting to acquire a greater lock. Here is the hierarchy-
41 * lport > disc, lport > rport, disc > rport
45 * The callbacks cause complications with this scheme. There is a callback
46 * from the rport (to either lport or disc) and a callback from disc
49 * As rports exit the rport state machine a callback is made to the owner of
50 * the rport to notify success or failure. Since the callback is likely to
51 * cause the lport or disc to grab its lock we cannot hold the rport lock
52 * while making the callback. To ensure that the rport is not free'd while
53 * processing the callback the rport callbacks are serialized through a
54 * single-threaded workqueue. An rport would never be free'd while in a
55 * callback handler because no other rport work in this queue can be executed
58 * When discovery succeeds or fails a callback is made to the lport as
59 * notification. Currently, successful discovery causes the lport to take no
60 * action. A failure will cause the lport to reset. There is likely a circular
61 * locking problem with this implementation.
67 * The critical sections protected by the lport's mutex are quite broad and
68 * may be improved upon in the future. The lport code and its locking doesn't
69 * influence the I/O path, so excessive locking doesn't penalize I/O
72 * The strategy is to lock whenever processing a request or response. Note
73 * that every _enter_* function corresponds to a state change. They generally
74 * change the lports state and then send a request out on the wire. We lock
75 * before calling any of these functions to protect that state change. This
76 * means that the entry points into the lport block manage the locks while
77 * the state machine can transition between states (i.e. _enter_* functions)
78 * while always staying protected.
80 * When handling responses we also hold the lport mutex broadly. When the
81 * lport receives the response frame it locks the mutex and then calls the
82 * appropriate handler for the particuar response. Generally a response will
83 * trigger a state change and so the lock must already be held.
85 * Retries also have to consider the locking. The retries occur from a work
86 * context and the work function will lock the lport and then retry the state
87 * (i.e. _enter_* function).
90 #include <linux/timer.h>
91 #include <linux/delay.h>
92 #include <linux/module.h>
93 #include <linux/slab.h>
94 #include <asm/unaligned.h>
96 #include <scsi/fc/fc_gs.h>
98 #include <scsi/libfc.h>
99 #include <scsi/fc_encode.h>
100 #include <linux/scatterlist.h>
102 #include "fc_libfc.h"
104 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
105 #define FC_LOCAL_PTP_FID_LO 0x010101
106 #define FC_LOCAL_PTP_FID_HI 0x010102
108 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
110 static void fc_lport_error(struct fc_lport *, struct fc_frame *);
112 static void fc_lport_enter_reset(struct fc_lport *);
113 static void fc_lport_enter_flogi(struct fc_lport *);
114 static void fc_lport_enter_dns(struct fc_lport *);
115 static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
116 static void fc_lport_enter_scr(struct fc_lport *);
117 static void fc_lport_enter_ready(struct fc_lport *);
118 static void fc_lport_enter_logo(struct fc_lport *);
119 static void fc_lport_enter_fdmi(struct fc_lport *lport);
120 static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state);
122 static const char *fc_lport_state_names[] = {
123 [LPORT_ST_DISABLED] = "disabled",
124 [LPORT_ST_FLOGI] = "FLOGI",
125 [LPORT_ST_DNS] = "dNS",
126 [LPORT_ST_RNN_ID] = "RNN_ID",
127 [LPORT_ST_RSNN_NN] = "RSNN_NN",
128 [LPORT_ST_RSPN_ID] = "RSPN_ID",
129 [LPORT_ST_RFT_ID] = "RFT_ID",
130 [LPORT_ST_RFF_ID] = "RFF_ID",
131 [LPORT_ST_FDMI] = "FDMI",
132 [LPORT_ST_RHBA] = "RHBA",
133 [LPORT_ST_RPA] = "RPA",
134 [LPORT_ST_DHBA] = "DHBA",
135 [LPORT_ST_DPRT] = "DPRT",
136 [LPORT_ST_SCR] = "SCR",
137 [LPORT_ST_READY] = "Ready",
138 [LPORT_ST_LOGO] = "LOGO",
139 [LPORT_ST_RESET] = "reset",
143 * struct fc_bsg_info - FC Passthrough managemet structure
144 * @job: The passthrough job
145 * @lport: The local port to pass through a command
146 * @rsp_code: The expected response code
147 * @sg: job->reply_payload.sg_list
148 * @nents: job->reply_payload.sg_cnt
149 * @offset: The offset into the response data
152 struct fc_bsg_job *job;
153 struct fc_lport *lport;
155 struct scatterlist *sg;
161 * fc_frame_drop() - Dummy frame handler
162 * @lport: The local port the frame was received on
163 * @fp: The received frame
165 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
172 * fc_lport_rport_callback() - Event handler for rport events
173 * @lport: The lport which is receiving the event
174 * @rdata: private remote port data
175 * @event: The event that occurred
177 * Locking Note: The rport lock should not be held when calling
180 static void fc_lport_rport_callback(struct fc_lport *lport,
181 struct fc_rport_priv *rdata,
182 enum fc_rport_event event)
184 FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
187 mutex_lock(&lport->lp_mutex);
190 if (lport->state == LPORT_ST_DNS) {
191 lport->dns_rdata = rdata;
192 fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
193 } else if (lport->state == LPORT_ST_FDMI) {
194 lport->ms_rdata = rdata;
195 fc_lport_enter_ms(lport, LPORT_ST_DHBA);
197 FC_LPORT_DBG(lport, "Received an READY event "
198 "on port (%6.6x) for the directory "
199 "server, but the lport is not "
200 "in the DNS or FDMI state, it's in the "
201 "%d state", rdata->ids.port_id,
203 lport->tt.rport_logoff(rdata);
207 case RPORT_EV_FAILED:
209 if (rdata->ids.port_id == FC_FID_DIR_SERV)
210 lport->dns_rdata = NULL;
211 else if (rdata->ids.port_id == FC_FID_MGMT_SERV)
212 lport->ms_rdata = NULL;
217 mutex_unlock(&lport->lp_mutex);
221 * fc_lport_state() - Return a string which represents the lport's state
222 * @lport: The lport whose state is to converted to a string
224 static const char *fc_lport_state(struct fc_lport *lport)
228 cp = fc_lport_state_names[lport->state];
235 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
236 * @lport: The lport to attach the ptp rport to
237 * @remote_fid: The FID of the ptp rport
238 * @remote_wwpn: The WWPN of the ptp rport
239 * @remote_wwnn: The WWNN of the ptp rport
241 static void fc_lport_ptp_setup(struct fc_lport *lport,
242 u32 remote_fid, u64 remote_wwpn,
245 mutex_lock(&lport->disc.disc_mutex);
246 if (lport->ptp_rdata) {
247 lport->tt.rport_logoff(lport->ptp_rdata);
248 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
250 lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
251 kref_get(&lport->ptp_rdata->kref);
252 lport->ptp_rdata->ids.port_name = remote_wwpn;
253 lport->ptp_rdata->ids.node_name = remote_wwnn;
254 mutex_unlock(&lport->disc.disc_mutex);
256 lport->tt.rport_login(lport->ptp_rdata);
258 fc_lport_enter_ready(lport);
262 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
263 * @shost: The SCSI host whose port state is to be determined
265 void fc_get_host_port_state(struct Scsi_Host *shost)
267 struct fc_lport *lport = shost_priv(shost);
269 mutex_lock(&lport->lp_mutex);
271 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
273 switch (lport->state) {
275 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
278 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
280 mutex_unlock(&lport->lp_mutex);
282 EXPORT_SYMBOL(fc_get_host_port_state);
285 * fc_get_host_speed() - Return the speed of the given Scsi_Host
286 * @shost: The SCSI host whose port speed is to be determined
288 void fc_get_host_speed(struct Scsi_Host *shost)
290 struct fc_lport *lport = shost_priv(shost);
292 fc_host_speed(shost) = lport->link_speed;
294 EXPORT_SYMBOL(fc_get_host_speed);
297 * fc_get_host_stats() - Return the Scsi_Host's statistics
298 * @shost: The SCSI host whose statistics are to be returned
300 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
302 struct fc_host_statistics *fcoe_stats;
303 struct fc_lport *lport = shost_priv(shost);
304 struct timespec v0, v1;
306 u64 fcp_in_bytes = 0;
307 u64 fcp_out_bytes = 0;
309 fcoe_stats = &lport->host_stats;
310 memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
312 jiffies_to_timespec(jiffies, &v0);
313 jiffies_to_timespec(lport->boot_time, &v1);
314 fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
316 for_each_possible_cpu(cpu) {
317 struct fcoe_dev_stats *stats;
319 stats = per_cpu_ptr(lport->dev_stats, cpu);
321 fcoe_stats->tx_frames += stats->TxFrames;
322 fcoe_stats->tx_words += stats->TxWords;
323 fcoe_stats->rx_frames += stats->RxFrames;
324 fcoe_stats->rx_words += stats->RxWords;
325 fcoe_stats->error_frames += stats->ErrorFrames;
326 fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
327 fcoe_stats->fcp_input_requests += stats->InputRequests;
328 fcoe_stats->fcp_output_requests += stats->OutputRequests;
329 fcoe_stats->fcp_control_requests += stats->ControlRequests;
330 fcp_in_bytes += stats->InputBytes;
331 fcp_out_bytes += stats->OutputBytes;
332 fcoe_stats->link_failure_count += stats->LinkFailureCount;
334 fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
335 fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
336 fcoe_stats->lip_count = -1;
337 fcoe_stats->nos_count = -1;
338 fcoe_stats->loss_of_sync_count = -1;
339 fcoe_stats->loss_of_signal_count = -1;
340 fcoe_stats->prim_seq_protocol_err_count = -1;
341 fcoe_stats->dumped_frames = -1;
344 EXPORT_SYMBOL(fc_get_host_stats);
347 * fc_lport_flogi_fill() - Fill in FLOGI command for request
348 * @lport: The local port the FLOGI is for
349 * @flogi: The FLOGI command
352 static void fc_lport_flogi_fill(struct fc_lport *lport,
353 struct fc_els_flogi *flogi,
356 struct fc_els_csp *sp;
357 struct fc_els_cssp *cp;
359 memset(flogi, 0, sizeof(*flogi));
360 flogi->fl_cmd = (u8) op;
361 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
362 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
364 sp->sp_hi_ver = 0x20;
365 sp->sp_lo_ver = 0x20;
366 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
367 sp->sp_bb_data = htons((u16) lport->mfs);
368 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
369 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
370 if (op != ELS_FLOGI) {
371 sp->sp_features = htons(FC_SP_FT_CIRO);
372 sp->sp_tot_seq = htons(255); /* seq. we accept */
373 sp->sp_rel_off = htons(0x1f);
374 sp->sp_e_d_tov = htonl(lport->e_d_tov);
376 cp->cp_rdfs = htons((u16) lport->mfs);
377 cp->cp_con_seq = htons(255);
383 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
384 * @lport: The local port to add a new FC-4 type to
385 * @type: The new FC-4 type
387 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
391 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
392 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
396 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
397 * @lport: Fibre Channel local port receiving the RLIR
398 * @fp: The RLIR request frame
400 * Locking Note: The lport lock is expected to be held before calling
403 static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
405 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
406 fc_lport_state(lport));
408 lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
413 * fc_lport_recv_echo_req() - Handle received ECHO request
414 * @lport: The local port receiving the ECHO
415 * @fp: ECHO request frame
417 * Locking Note: The lport lock is expected to be held before calling
420 static void fc_lport_recv_echo_req(struct fc_lport *lport,
421 struct fc_frame *in_fp)
428 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
429 fc_lport_state(lport));
431 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
432 pp = fc_frame_payload_get(in_fp, len);
434 if (len < sizeof(__be32))
435 len = sizeof(__be32);
437 fp = fc_frame_alloc(lport, len);
439 dp = fc_frame_payload_get(fp, len);
441 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
442 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
443 lport->tt.frame_send(lport, fp);
445 fc_frame_free(in_fp);
449 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
450 * @lport: The local port receiving the RNID
451 * @fp: The RNID request frame
453 * Locking Note: The lport lock is expected to be held before calling
456 static void fc_lport_recv_rnid_req(struct fc_lport *lport,
457 struct fc_frame *in_fp)
460 struct fc_els_rnid *req;
462 struct fc_els_rnid_resp rnid;
463 struct fc_els_rnid_cid cid;
464 struct fc_els_rnid_gen gen;
466 struct fc_seq_els_data rjt_data;
470 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
471 fc_lport_state(lport));
473 req = fc_frame_payload_get(in_fp, sizeof(*req));
475 rjt_data.reason = ELS_RJT_LOGIC;
476 rjt_data.explan = ELS_EXPL_NONE;
477 lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
481 if (fmt != ELS_RNIDF_GEN ||
482 ntohl(lport->rnid_gen.rnid_atype) == 0) {
483 fmt = ELS_RNIDF_NONE; /* nothing to provide */
484 len -= sizeof(rp->gen);
486 fp = fc_frame_alloc(lport, len);
488 rp = fc_frame_payload_get(fp, len);
490 rp->rnid.rnid_cmd = ELS_LS_ACC;
491 rp->rnid.rnid_fmt = fmt;
492 rp->rnid.rnid_cid_len = sizeof(rp->cid);
493 rp->cid.rnid_wwpn = htonll(lport->wwpn);
494 rp->cid.rnid_wwnn = htonll(lport->wwnn);
495 if (fmt == ELS_RNIDF_GEN) {
496 rp->rnid.rnid_sid_len = sizeof(rp->gen);
497 memcpy(&rp->gen, &lport->rnid_gen,
500 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
501 lport->tt.frame_send(lport, fp);
504 fc_frame_free(in_fp);
508 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
509 * @lport: The local port receiving the LOGO
510 * @fp: The LOGO request frame
512 * Locking Note: The lport lock is exected to be held before calling
515 static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
517 lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
518 fc_lport_enter_reset(lport);
523 * fc_fabric_login() - Start the lport state machine
524 * @lport: The local port that should log into the fabric
526 * Locking Note: This function should not be called
527 * with the lport lock held.
529 int fc_fabric_login(struct fc_lport *lport)
533 mutex_lock(&lport->lp_mutex);
534 if (lport->state == LPORT_ST_DISABLED ||
535 lport->state == LPORT_ST_LOGO) {
536 fc_lport_state_enter(lport, LPORT_ST_RESET);
537 fc_lport_enter_reset(lport);
540 mutex_unlock(&lport->lp_mutex);
544 EXPORT_SYMBOL(fc_fabric_login);
547 * __fc_linkup() - Handler for transport linkup events
548 * @lport: The lport whose link is up
550 * Locking: must be called with the lp_mutex held
552 void __fc_linkup(struct fc_lport *lport)
554 if (!lport->link_up) {
557 if (lport->state == LPORT_ST_RESET)
558 fc_lport_enter_flogi(lport);
563 * fc_linkup() - Handler for transport linkup events
564 * @lport: The local port whose link is up
566 void fc_linkup(struct fc_lport *lport)
568 printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
569 lport->host->host_no, lport->port_id);
571 mutex_lock(&lport->lp_mutex);
573 mutex_unlock(&lport->lp_mutex);
575 EXPORT_SYMBOL(fc_linkup);
578 * __fc_linkdown() - Handler for transport linkdown events
579 * @lport: The lport whose link is down
581 * Locking: must be called with the lp_mutex held
583 void __fc_linkdown(struct fc_lport *lport)
585 if (lport->link_up) {
587 fc_lport_enter_reset(lport);
588 lport->tt.fcp_cleanup(lport);
593 * fc_linkdown() - Handler for transport linkdown events
594 * @lport: The local port whose link is down
596 void fc_linkdown(struct fc_lport *lport)
598 printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
599 lport->host->host_no, lport->port_id);
601 mutex_lock(&lport->lp_mutex);
602 __fc_linkdown(lport);
603 mutex_unlock(&lport->lp_mutex);
605 EXPORT_SYMBOL(fc_linkdown);
608 * fc_fabric_logoff() - Logout of the fabric
609 * @lport: The local port to logoff the fabric
612 * 0 for success, -1 for failure
614 int fc_fabric_logoff(struct fc_lport *lport)
616 lport->tt.disc_stop_final(lport);
617 mutex_lock(&lport->lp_mutex);
618 if (lport->dns_rdata)
619 lport->tt.rport_logoff(lport->dns_rdata);
620 mutex_unlock(&lport->lp_mutex);
621 lport->tt.rport_flush_queue();
622 mutex_lock(&lport->lp_mutex);
623 fc_lport_enter_logo(lport);
624 mutex_unlock(&lport->lp_mutex);
625 cancel_delayed_work_sync(&lport->retry_work);
628 EXPORT_SYMBOL(fc_fabric_logoff);
631 * fc_lport_destroy() - Unregister a fc_lport
632 * @lport: The local port to unregister
635 * exit routine for fc_lport instance
636 * clean-up all the allocated memory
637 * and free up other system resources.
640 int fc_lport_destroy(struct fc_lport *lport)
642 mutex_lock(&lport->lp_mutex);
643 lport->state = LPORT_ST_DISABLED;
645 lport->tt.frame_send = fc_frame_drop;
646 mutex_unlock(&lport->lp_mutex);
648 lport->tt.fcp_abort_io(lport);
649 lport->tt.disc_stop_final(lport);
650 lport->tt.exch_mgr_reset(lport, 0, 0);
651 cancel_delayed_work_sync(&lport->retry_work);
652 fc_fc4_del_lport(lport);
655 EXPORT_SYMBOL(fc_lport_destroy);
658 * fc_set_mfs() - Set the maximum frame size for a local port
659 * @lport: The local port to set the MFS for
662 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
664 unsigned int old_mfs;
667 mutex_lock(&lport->lp_mutex);
669 old_mfs = lport->mfs;
671 if (mfs >= FC_MIN_MAX_FRAME) {
673 if (mfs > FC_MAX_FRAME)
675 mfs -= sizeof(struct fc_frame_header);
680 if (!rc && mfs < old_mfs)
681 fc_lport_enter_reset(lport);
683 mutex_unlock(&lport->lp_mutex);
687 EXPORT_SYMBOL(fc_set_mfs);
690 * fc_lport_disc_callback() - Callback for discovery events
691 * @lport: The local port receiving the event
692 * @event: The discovery event
694 static void fc_lport_disc_callback(struct fc_lport *lport,
695 enum fc_disc_event event)
698 case DISC_EV_SUCCESS:
699 FC_LPORT_DBG(lport, "Discovery succeeded\n");
702 printk(KERN_ERR "host%d: libfc: "
703 "Discovery failed for port (%6.6x)\n",
704 lport->host->host_no, lport->port_id);
705 mutex_lock(&lport->lp_mutex);
706 fc_lport_enter_reset(lport);
707 mutex_unlock(&lport->lp_mutex);
716 * fc_rport_enter_ready() - Enter the ready state and start discovery
717 * @lport: The local port that is ready
719 * Locking Note: The lport lock is expected to be held before calling
722 static void fc_lport_enter_ready(struct fc_lport *lport)
724 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
725 fc_lport_state(lport));
727 fc_lport_state_enter(lport, LPORT_ST_READY);
729 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
730 fc_vports_linkchange(lport);
732 if (!lport->ptp_rdata)
733 lport->tt.disc_start(fc_lport_disc_callback, lport);
737 * fc_lport_set_port_id() - set the local port Port ID
738 * @lport: The local port which will have its Port ID set.
739 * @port_id: The new port ID.
740 * @fp: The frame containing the incoming request, or NULL.
742 * Locking Note: The lport lock is expected to be held before calling
745 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
749 printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
750 lport->host->host_no, port_id);
752 lport->port_id = port_id;
754 /* Update the fc_host */
755 fc_host_port_id(lport->host) = port_id;
757 if (lport->tt.lport_set_port_id)
758 lport->tt.lport_set_port_id(lport, port_id, fp);
762 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
763 * @lport: The local port which will have its Port ID set.
764 * @port_id: The new port ID.
766 * Called by the lower-level driver when transport sets the local port_id.
767 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
768 * discovery to be skipped.
770 void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
772 mutex_lock(&lport->lp_mutex);
774 fc_lport_set_port_id(lport, port_id, NULL);
776 switch (lport->state) {
780 fc_lport_enter_ready(lport);
785 mutex_unlock(&lport->lp_mutex);
787 EXPORT_SYMBOL(fc_lport_set_local_id);
790 * fc_lport_recv_flogi_req() - Receive a FLOGI request
791 * @lport: The local port that received the request
792 * @rx_fp: The FLOGI frame
794 * A received FLOGI request indicates a point-to-point connection.
795 * Accept it with the common service parameters indicating our N port.
796 * Set up to do a PLOGI if we have the higher-number WWPN.
798 * Locking Note: The lport lock is expected to be held before calling
801 static void fc_lport_recv_flogi_req(struct fc_lport *lport,
802 struct fc_frame *rx_fp)
805 struct fc_frame_header *fh;
806 struct fc_els_flogi *flp;
807 struct fc_els_flogi *new_flp;
812 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
813 fc_lport_state(lport));
815 remote_fid = fc_frame_sid(rx_fp);
816 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
819 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
820 if (remote_wwpn == lport->wwpn) {
821 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
822 "with same WWPN %16.16llx\n",
823 lport->host->host_no, remote_wwpn);
826 FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
829 * XXX what is the right thing to do for FIDs?
830 * The originator might expect our S_ID to be 0xfffffe.
831 * But if so, both of us could end up with the same FID.
833 local_fid = FC_LOCAL_PTP_FID_LO;
834 if (remote_wwpn < lport->wwpn) {
835 local_fid = FC_LOCAL_PTP_FID_HI;
836 if (!remote_fid || remote_fid == local_fid)
837 remote_fid = FC_LOCAL_PTP_FID_LO;
838 } else if (!remote_fid) {
839 remote_fid = FC_LOCAL_PTP_FID_HI;
842 fc_lport_set_port_id(lport, local_fid, rx_fp);
844 fp = fc_frame_alloc(lport, sizeof(*flp));
846 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
847 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
848 new_flp->fl_cmd = (u8) ELS_LS_ACC;
851 * Send the response. If this fails, the originator should
852 * repeat the sequence.
854 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
855 fh = fc_frame_header_get(fp);
856 hton24(fh->fh_s_id, local_fid);
857 hton24(fh->fh_d_id, remote_fid);
858 lport->tt.frame_send(lport, fp);
861 fc_lport_error(lport, fp);
863 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
864 get_unaligned_be64(&flp->fl_wwnn));
866 fc_frame_free(rx_fp);
870 * fc_lport_recv_els_req() - The generic lport ELS request handler
871 * @lport: The local port that received the request
872 * @fp: The request frame
874 * This function will see if the lport handles the request or
875 * if an rport should handle the request.
877 * Locking Note: This function should not be called with the lport
878 * lock held because it will grab the lock.
880 static void fc_lport_recv_els_req(struct fc_lport *lport,
883 void (*recv)(struct fc_lport *, struct fc_frame *);
885 mutex_lock(&lport->lp_mutex);
888 * Handle special ELS cases like FLOGI, LOGO, and
889 * RSCN here. These don't require a session.
890 * Even if we had a session, it might not be ready.
898 recv = lport->tt.rport_recv_req;
899 switch (fc_frame_payload_op(fp)) {
901 if (!lport->point_to_multipoint)
902 recv = fc_lport_recv_flogi_req;
905 if (fc_frame_sid(fp) == FC_FID_FLOGI)
906 recv = fc_lport_recv_logo_req;
909 recv = lport->tt.disc_recv_req;
912 recv = fc_lport_recv_echo_req;
915 recv = fc_lport_recv_rlir_req;
918 recv = fc_lport_recv_rnid_req;
924 mutex_unlock(&lport->lp_mutex);
927 static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
928 const struct fc_els_spp *spp_in,
929 struct fc_els_spp *spp_out)
931 return FC_SPP_RESP_INVL;
934 struct fc4_prov fc_lport_els_prov = {
935 .prli = fc_lport_els_prli,
936 .recv = fc_lport_recv_els_req,
940 * fc_lport_recv_req() - The generic lport request handler
941 * @lport: The lport that received the request
942 * @fp: The frame the request is in
944 * Locking Note: This function should not be called with the lport
945 * lock held because it may grab the lock.
947 static void fc_lport_recv_req(struct fc_lport *lport,
950 struct fc_frame_header *fh = fc_frame_header_get(fp);
951 struct fc_seq *sp = fr_seq(fp);
952 struct fc4_prov *prov;
955 * Use RCU read lock and module_lock to be sure module doesn't
956 * deregister and get unloaded while we're calling it.
957 * try_module_get() is inlined and accepts a NULL parameter.
958 * Only ELSes and FCP target ops should come through here.
959 * The locking is unfortunate, and a better scheme is being sought.
963 if (fh->fh_type >= FC_FC4_PROV_SIZE)
965 prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
966 if (!prov || !try_module_get(prov->module))
969 prov->recv(lport, fp);
970 module_put(prov->module);
974 FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
976 lport->tt.exch_done(sp);
980 * fc_lport_reset() - Reset a local port
981 * @lport: The local port which should be reset
983 * Locking Note: This functions should not be called with the
986 int fc_lport_reset(struct fc_lport *lport)
988 cancel_delayed_work_sync(&lport->retry_work);
989 mutex_lock(&lport->lp_mutex);
990 fc_lport_enter_reset(lport);
991 mutex_unlock(&lport->lp_mutex);
994 EXPORT_SYMBOL(fc_lport_reset);
997 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
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_reset_locked(struct fc_lport *lport)
1005 if (lport->dns_rdata)
1006 lport->tt.rport_logoff(lport->dns_rdata);
1008 if (lport->ptp_rdata) {
1009 lport->tt.rport_logoff(lport->ptp_rdata);
1010 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
1011 lport->ptp_rdata = NULL;
1014 lport->tt.disc_stop(lport);
1016 lport->tt.exch_mgr_reset(lport, 0, 0);
1017 fc_host_fabric_name(lport->host) = 0;
1019 if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
1020 fc_lport_set_port_id(lport, 0, NULL);
1024 * fc_lport_enter_reset() - Reset the local port
1025 * @lport: The local port to be reset
1027 * Locking Note: The lport lock is expected to be held before calling
1030 static void fc_lport_enter_reset(struct fc_lport *lport)
1032 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
1033 fc_lport_state(lport));
1035 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
1040 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
1042 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
1044 fc_lport_state_enter(lport, LPORT_ST_RESET);
1045 fc_host_post_event(lport->host, fc_get_event_number(),
1046 FCH_EVT_LIPRESET, 0);
1047 fc_vports_linkchange(lport);
1048 fc_lport_reset_locked(lport);
1050 fc_lport_enter_flogi(lport);
1054 * fc_lport_enter_disabled() - Disable the local port
1055 * @lport: The local port to be reset
1057 * Locking Note: The lport lock is expected to be held before calling
1060 static void fc_lport_enter_disabled(struct fc_lport *lport)
1062 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1063 fc_lport_state(lport));
1065 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1066 fc_vports_linkchange(lport);
1067 fc_lport_reset_locked(lport);
1071 * fc_lport_error() - Handler for any errors
1072 * @lport: The local port that the error was on
1073 * @fp: The error code encoded in a frame pointer
1075 * If the error was caused by a resource allocation failure
1076 * then wait for half a second and retry, otherwise retry
1077 * after the e_d_tov time.
1079 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1081 unsigned long delay = 0;
1082 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1083 PTR_ERR(fp), fc_lport_state(lport),
1084 lport->retry_count);
1086 if (PTR_ERR(fp) == -FC_EX_CLOSED)
1090 * Memory allocation failure, or the exchange timed out
1091 * or we received LS_RJT.
1094 if (lport->retry_count < lport->max_retry_count) {
1095 lport->retry_count++;
1097 delay = msecs_to_jiffies(500);
1099 delay = msecs_to_jiffies(lport->e_d_tov);
1101 schedule_delayed_work(&lport->retry_work, delay);
1103 fc_lport_enter_reset(lport);
1107 * fc_lport_ns_resp() - Handle response to a name server
1108 * registration exchange
1109 * @sp: current sequence in exchange
1110 * @fp: response frame
1111 * @lp_arg: Fibre Channel host port instance
1113 * Locking Note: This function will be called without the lport lock
1114 * held, but it will lock, call an _enter_* function or fc_lport_error()
1115 * and then unlock the lport.
1117 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1120 struct fc_lport *lport = lp_arg;
1121 struct fc_frame_header *fh;
1122 struct fc_ct_hdr *ct;
1124 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1126 if (fp == ERR_PTR(-FC_EX_CLOSED))
1129 mutex_lock(&lport->lp_mutex);
1131 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1132 FC_LPORT_DBG(lport, "Received a name server response, "
1133 "but in state %s\n", fc_lport_state(lport));
1140 fc_lport_error(lport, fp);
1144 fh = fc_frame_header_get(fp);
1145 ct = fc_frame_payload_get(fp, sizeof(*ct));
1147 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1148 ct->ct_fs_type == FC_FST_DIR &&
1149 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1150 ntohs(ct->ct_cmd) == FC_FS_ACC)
1151 switch (lport->state) {
1152 case LPORT_ST_RNN_ID:
1153 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1155 case LPORT_ST_RSNN_NN:
1156 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1158 case LPORT_ST_RSPN_ID:
1159 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1161 case LPORT_ST_RFT_ID:
1162 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1164 case LPORT_ST_RFF_ID:
1165 if (lport->fdmi_enabled)
1166 fc_lport_enter_fdmi(lport);
1168 fc_lport_enter_scr(lport);
1171 /* should have already been caught by state checks */
1175 fc_lport_error(lport, fp);
1179 mutex_unlock(&lport->lp_mutex);
1183 * fc_lport_ms_resp() - Handle response to a management server
1185 * @sp: current sequence in exchange
1186 * @fp: response frame
1187 * @lp_arg: Fibre Channel host port instance
1189 * Locking Note: This function will be called without the lport lock
1190 * held, but it will lock, call an _enter_* function or fc_lport_error()
1191 * and then unlock the lport.
1193 static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp,
1196 struct fc_lport *lport = lp_arg;
1197 struct fc_frame_header *fh;
1198 struct fc_ct_hdr *ct;
1200 FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp));
1202 if (fp == ERR_PTR(-FC_EX_CLOSED))
1205 mutex_lock(&lport->lp_mutex);
1207 if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) {
1208 FC_LPORT_DBG(lport, "Received a management server response, "
1209 "but in state %s\n", fc_lport_state(lport));
1216 fc_lport_error(lport, fp);
1220 fh = fc_frame_header_get(fp);
1221 ct = fc_frame_payload_get(fp, sizeof(*ct));
1223 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1224 ct->ct_fs_type == FC_FST_MGMT &&
1225 ct->ct_fs_subtype == FC_FDMI_SUBTYPE) {
1226 FC_LPORT_DBG(lport, "Received a management server response, "
1227 "reason=%d explain=%d\n",
1231 switch (lport->state) {
1233 if (ntohs(ct->ct_cmd) == FC_FS_ACC)
1234 fc_lport_enter_ms(lport, LPORT_ST_RPA);
1235 else /* Error Skip RPA */
1236 fc_lport_enter_scr(lport);
1239 fc_lport_enter_scr(lport);
1242 fc_lport_enter_ms(lport, LPORT_ST_RHBA);
1245 fc_lport_enter_ms(lport, LPORT_ST_DPRT);
1248 /* should have already been caught by state checks */
1252 /* Invalid Frame? */
1253 fc_lport_error(lport, fp);
1258 mutex_unlock(&lport->lp_mutex);
1262 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1263 * @sp: current sequence in SCR exchange
1264 * @fp: response frame
1265 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1267 * Locking Note: This function will be called without the lport lock
1268 * held, but it will lock, call an _enter_* function or fc_lport_error
1269 * and then unlock the lport.
1271 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1274 struct fc_lport *lport = lp_arg;
1277 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1279 if (fp == ERR_PTR(-FC_EX_CLOSED))
1282 mutex_lock(&lport->lp_mutex);
1284 if (lport->state != LPORT_ST_SCR) {
1285 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1286 "%s\n", fc_lport_state(lport));
1293 fc_lport_error(lport, fp);
1297 op = fc_frame_payload_op(fp);
1298 if (op == ELS_LS_ACC)
1299 fc_lport_enter_ready(lport);
1301 fc_lport_error(lport, fp);
1306 mutex_unlock(&lport->lp_mutex);
1310 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1311 * @lport: The local port to register for state changes
1313 * Locking Note: The lport lock is expected to be held before calling
1316 static void fc_lport_enter_scr(struct fc_lport *lport)
1318 struct fc_frame *fp;
1320 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1321 fc_lport_state(lport));
1323 fc_lport_state_enter(lport, LPORT_ST_SCR);
1325 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1327 fc_lport_error(lport, fp);
1331 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1332 fc_lport_scr_resp, lport,
1333 2 * lport->r_a_tov))
1334 fc_lport_error(lport, NULL);
1338 * fc_lport_enter_ns() - register some object with the name server
1339 * @lport: Fibre Channel local port to register
1341 * Locking Note: The lport lock is expected to be held before calling
1344 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1346 struct fc_frame *fp;
1348 int size = sizeof(struct fc_ct_hdr);
1351 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1352 fc_lport_state_names[state],
1353 fc_lport_state(lport));
1355 fc_lport_state_enter(lport, state);
1358 case LPORT_ST_RNN_ID:
1360 size += sizeof(struct fc_ns_rn_id);
1362 case LPORT_ST_RSNN_NN:
1363 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1364 /* if there is no symbolic name, skip to RFT_ID */
1366 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1367 cmd = FC_NS_RSNN_NN;
1368 size += sizeof(struct fc_ns_rsnn) + len;
1370 case LPORT_ST_RSPN_ID:
1371 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1372 /* if there is no symbolic name, skip to RFT_ID */
1374 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1375 cmd = FC_NS_RSPN_ID;
1376 size += sizeof(struct fc_ns_rspn) + len;
1378 case LPORT_ST_RFT_ID:
1380 size += sizeof(struct fc_ns_rft);
1382 case LPORT_ST_RFF_ID:
1384 size += sizeof(struct fc_ns_rff_id);
1387 fc_lport_error(lport, NULL);
1391 fp = fc_frame_alloc(lport, size);
1393 fc_lport_error(lport, fp);
1397 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1399 lport, 3 * lport->r_a_tov))
1400 fc_lport_error(lport, fp);
1403 static struct fc_rport_operations fc_lport_rport_ops = {
1404 .event_callback = fc_lport_rport_callback,
1408 * fc_rport_enter_dns() - Create a fc_rport for the name server
1409 * @lport: The local port requesting a remote port for the name server
1411 * Locking Note: The lport lock is expected to be held before calling
1414 static void fc_lport_enter_dns(struct fc_lport *lport)
1416 struct fc_rport_priv *rdata;
1418 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1419 fc_lport_state(lport));
1421 fc_lport_state_enter(lport, LPORT_ST_DNS);
1423 mutex_lock(&lport->disc.disc_mutex);
1424 rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1425 mutex_unlock(&lport->disc.disc_mutex);
1429 rdata->ops = &fc_lport_rport_ops;
1430 lport->tt.rport_login(rdata);
1434 fc_lport_error(lport, NULL);
1438 * fc_lport_enter_ms() - management server commands
1439 * @lport: Fibre Channel local port to register
1441 * Locking Note: The lport lock is expected to be held before calling
1444 static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state)
1446 struct fc_frame *fp;
1447 enum fc_fdmi_req cmd;
1448 int size = sizeof(struct fc_ct_hdr);
1452 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1453 fc_lport_state_names[state],
1454 fc_lport_state(lport));
1456 fc_lport_state_enter(lport, state);
1461 /* Number of HBA Attributes */
1463 len = sizeof(struct fc_fdmi_rhba);
1464 len -= sizeof(struct fc_fdmi_attr_entry);
1465 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1466 len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
1467 len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
1468 len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
1469 len += FC_FDMI_HBA_ATTR_MODEL_LEN;
1470 len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
1471 len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
1472 len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
1473 len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
1474 len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
1475 len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
1481 /* Number of Port Attributes */
1483 len = sizeof(struct fc_fdmi_rpa);
1484 len -= sizeof(struct fc_fdmi_attr_entry);
1485 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1486 len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
1487 len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
1488 len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
1489 len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
1490 len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
1491 len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
1497 len = sizeof(struct fc_fdmi_dprt);
1502 len = sizeof(struct fc_fdmi_dhba);
1506 fc_lport_error(lport, NULL);
1510 FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n",
1511 cmd, (int)len, size);
1512 fp = fc_frame_alloc(lport, size);
1514 fc_lport_error(lport, fp);
1518 if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd,
1520 lport, 3 * lport->r_a_tov))
1521 fc_lport_error(lport, fp);
1525 * fc_rport_enter_fdmi() - Create a fc_rport for the management server
1526 * @lport: The local port requesting a remote port for the management server
1528 * Locking Note: The lport lock is expected to be held before calling
1531 static void fc_lport_enter_fdmi(struct fc_lport *lport)
1533 struct fc_rport_priv *rdata;
1535 FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n",
1536 fc_lport_state(lport));
1538 fc_lport_state_enter(lport, LPORT_ST_FDMI);
1540 mutex_lock(&lport->disc.disc_mutex);
1541 rdata = lport->tt.rport_create(lport, FC_FID_MGMT_SERV);
1542 mutex_unlock(&lport->disc.disc_mutex);
1546 rdata->ops = &fc_lport_rport_ops;
1547 lport->tt.rport_login(rdata);
1551 fc_lport_error(lport, NULL);
1555 * fc_lport_timeout() - Handler for the retry_work timer
1556 * @work: The work struct of the local port
1558 static void fc_lport_timeout(struct work_struct *work)
1560 struct fc_lport *lport =
1561 container_of(work, struct fc_lport,
1564 mutex_lock(&lport->lp_mutex);
1566 switch (lport->state) {
1567 case LPORT_ST_DISABLED:
1569 case LPORT_ST_READY:
1571 case LPORT_ST_RESET:
1573 case LPORT_ST_FLOGI:
1574 fc_lport_enter_flogi(lport);
1577 fc_lport_enter_dns(lport);
1579 case LPORT_ST_RNN_ID:
1580 case LPORT_ST_RSNN_NN:
1581 case LPORT_ST_RSPN_ID:
1582 case LPORT_ST_RFT_ID:
1583 case LPORT_ST_RFF_ID:
1584 fc_lport_enter_ns(lport, lport->state);
1587 fc_lport_enter_fdmi(lport);
1593 fc_lport_enter_ms(lport, lport->state);
1596 fc_lport_enter_scr(lport);
1599 fc_lport_enter_logo(lport);
1603 mutex_unlock(&lport->lp_mutex);
1607 * fc_lport_logo_resp() - Handle response to LOGO request
1608 * @sp: The sequence that the LOGO was on
1609 * @fp: The LOGO frame
1610 * @lp_arg: The lport port that received the LOGO request
1612 * Locking Note: This function will be called without the lport lock
1613 * held, but it will lock, call an _enter_* function or fc_lport_error()
1614 * and then unlock the lport.
1616 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1619 struct fc_lport *lport = lp_arg;
1622 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1624 if (fp == ERR_PTR(-FC_EX_CLOSED))
1627 mutex_lock(&lport->lp_mutex);
1629 if (lport->state != LPORT_ST_LOGO) {
1630 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1631 "%s\n", fc_lport_state(lport));
1638 fc_lport_error(lport, fp);
1642 op = fc_frame_payload_op(fp);
1643 if (op == ELS_LS_ACC)
1644 fc_lport_enter_disabled(lport);
1646 fc_lport_error(lport, fp);
1651 mutex_unlock(&lport->lp_mutex);
1653 EXPORT_SYMBOL(fc_lport_logo_resp);
1656 * fc_rport_enter_logo() - Logout of the fabric
1657 * @lport: The local port to be logged out
1659 * Locking Note: The lport lock is expected to be held before calling
1662 static void fc_lport_enter_logo(struct fc_lport *lport)
1664 struct fc_frame *fp;
1665 struct fc_els_logo *logo;
1667 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1668 fc_lport_state(lport));
1670 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1671 fc_vports_linkchange(lport);
1673 fp = fc_frame_alloc(lport, sizeof(*logo));
1675 fc_lport_error(lport, fp);
1679 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1680 fc_lport_logo_resp, lport,
1681 2 * lport->r_a_tov))
1682 fc_lport_error(lport, NULL);
1686 * fc_lport_flogi_resp() - Handle response to FLOGI request
1687 * @sp: The sequence that the FLOGI was on
1688 * @fp: The FLOGI response frame
1689 * @lp_arg: The lport port that received the FLOGI response
1691 * Locking Note: This function will be called without the lport lock
1692 * held, but it will lock, call an _enter_* function or fc_lport_error()
1693 * and then unlock the lport.
1695 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1698 struct fc_lport *lport = lp_arg;
1699 struct fc_frame_header *fh;
1700 struct fc_els_flogi *flp;
1703 unsigned int r_a_tov;
1704 unsigned int e_d_tov;
1707 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1709 if (fp == ERR_PTR(-FC_EX_CLOSED))
1712 mutex_lock(&lport->lp_mutex);
1714 if (lport->state != LPORT_ST_FLOGI) {
1715 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1716 "%s\n", fc_lport_state(lport));
1723 fc_lport_error(lport, fp);
1727 fh = fc_frame_header_get(fp);
1728 did = fc_frame_did(fp);
1729 if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 ||
1730 fc_frame_payload_op(fp) != ELS_LS_ACC) {
1731 FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n");
1732 fc_lport_error(lport, fp);
1736 flp = fc_frame_payload_get(fp, sizeof(*flp));
1738 FC_LPORT_DBG(lport, "FLOGI bad response\n");
1739 fc_lport_error(lport, fp);
1743 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1746 if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) {
1747 FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
1748 "lport->mfs:%hu\n", mfs, lport->mfs);
1749 fc_lport_error(lport, fp);
1753 if (mfs <= lport->mfs) {
1755 fc_host_maxframe_size(lport->host) = mfs;
1758 csp_flags = ntohs(flp->fl_csp.sp_features);
1759 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1760 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1761 if (csp_flags & FC_SP_FT_EDTR)
1764 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1766 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1767 if (e_d_tov > lport->e_d_tov)
1768 lport->e_d_tov = e_d_tov;
1769 lport->r_a_tov = 2 * e_d_tov;
1770 fc_lport_set_port_id(lport, did, fp);
1771 printk(KERN_INFO "host%d: libfc: "
1772 "Port (%6.6x) entered "
1773 "point-to-point mode\n",
1774 lport->host->host_no, did);
1775 fc_lport_ptp_setup(lport, fc_frame_sid(fp),
1781 lport->e_d_tov = e_d_tov;
1782 lport->r_a_tov = r_a_tov;
1783 fc_host_fabric_name(lport->host) =
1784 get_unaligned_be64(&flp->fl_wwnn);
1785 fc_lport_set_port_id(lport, did, fp);
1786 fc_lport_enter_dns(lport);
1792 mutex_unlock(&lport->lp_mutex);
1794 EXPORT_SYMBOL(fc_lport_flogi_resp);
1797 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1798 * @lport: Fibre Channel local port to be logged in to the fabric
1800 * Locking Note: The lport lock is expected to be held before calling
1803 static void fc_lport_enter_flogi(struct fc_lport *lport)
1805 struct fc_frame *fp;
1807 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1808 fc_lport_state(lport));
1810 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1812 if (lport->point_to_multipoint) {
1814 fc_lport_enter_ready(lport);
1818 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1820 return fc_lport_error(lport, fp);
1822 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1823 lport->vport ? ELS_FDISC : ELS_FLOGI,
1824 fc_lport_flogi_resp, lport,
1825 lport->vport ? 2 * lport->r_a_tov :
1827 fc_lport_error(lport, NULL);
1831 * fc_lport_config() - Configure a fc_lport
1832 * @lport: The local port to be configured
1834 int fc_lport_config(struct fc_lport *lport)
1836 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1837 mutex_init(&lport->lp_mutex);
1839 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1841 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1842 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1843 fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
1847 EXPORT_SYMBOL(fc_lport_config);
1850 * fc_lport_init() - Initialize the lport layer for a local port
1851 * @lport: The local port to initialize the exchange layer for
1853 int fc_lport_init(struct fc_lport *lport)
1855 if (!lport->tt.lport_recv)
1856 lport->tt.lport_recv = fc_lport_recv_req;
1858 if (!lport->tt.lport_reset)
1859 lport->tt.lport_reset = fc_lport_reset;
1861 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1862 fc_host_node_name(lport->host) = lport->wwnn;
1863 fc_host_port_name(lport->host) = lport->wwpn;
1864 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1865 memset(fc_host_supported_fc4s(lport->host), 0,
1866 sizeof(fc_host_supported_fc4s(lport->host)));
1867 fc_host_supported_fc4s(lport->host)[2] = 1;
1868 fc_host_supported_fc4s(lport->host)[7] = 1;
1870 /* This value is also unchanging */
1871 memset(fc_host_active_fc4s(lport->host), 0,
1872 sizeof(fc_host_active_fc4s(lport->host)));
1873 fc_host_active_fc4s(lport->host)[2] = 1;
1874 fc_host_active_fc4s(lport->host)[7] = 1;
1875 fc_host_maxframe_size(lport->host) = lport->mfs;
1876 fc_host_supported_speeds(lport->host) = 0;
1877 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1878 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1879 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1880 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1881 fc_fc4_add_lport(lport);
1885 EXPORT_SYMBOL(fc_lport_init);
1888 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1889 * @sp: The sequence for the FC Passthrough response
1890 * @fp: The response frame
1891 * @info_arg: The BSG info that the response is for
1893 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1896 struct fc_bsg_info *info = info_arg;
1897 struct fc_bsg_job *job = info->job;
1898 struct fc_lport *lport = info->lport;
1899 struct fc_frame_header *fh;
1904 job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1905 -ECONNABORTED : -ETIMEDOUT;
1906 job->reply_len = sizeof(uint32_t);
1907 job->state_flags |= FC_RQST_STATE_DONE;
1913 mutex_lock(&lport->lp_mutex);
1914 fh = fc_frame_header_get(fp);
1915 len = fr_len(fp) - sizeof(*fh);
1916 buf = fc_frame_payload_get(fp, 0);
1918 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1919 /* Get the response code from the first frame payload */
1920 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1921 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1922 (unsigned short)fc_frame_payload_op(fp);
1924 /* Save the reply status of the job */
1925 job->reply->reply_data.ctels_reply.status =
1926 (cmd == info->rsp_code) ?
1927 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1930 job->reply->reply_payload_rcv_len +=
1931 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1932 &info->offset, NULL);
1934 if (fr_eof(fp) == FC_EOF_T &&
1935 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1936 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1937 if (job->reply->reply_payload_rcv_len >
1938 job->reply_payload.payload_len)
1939 job->reply->reply_payload_rcv_len =
1940 job->reply_payload.payload_len;
1941 job->reply->result = 0;
1942 job->state_flags |= FC_RQST_STATE_DONE;
1947 mutex_unlock(&lport->lp_mutex);
1951 * fc_lport_els_request() - Send ELS passthrough request
1952 * @job: The BSG Passthrough job
1953 * @lport: The local port sending the request
1954 * @did: The destination port id
1956 * Locking Note: The lport lock is expected to be held before calling
1959 static int fc_lport_els_request(struct fc_bsg_job *job,
1960 struct fc_lport *lport,
1963 struct fc_bsg_info *info;
1964 struct fc_frame *fp;
1965 struct fc_frame_header *fh;
1969 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1973 len = job->request_payload.payload_len;
1974 pp = fc_frame_payload_get(fp, len);
1976 sg_copy_to_buffer(job->request_payload.sg_list,
1977 job->request_payload.sg_cnt,
1980 fh = fc_frame_header_get(fp);
1981 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1982 hton24(fh->fh_d_id, did);
1983 hton24(fh->fh_s_id, lport->port_id);
1984 fh->fh_type = FC_TYPE_ELS;
1985 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1988 fh->fh_parm_offset = 0;
1990 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1997 info->lport = lport;
1998 info->rsp_code = ELS_LS_ACC;
1999 info->nents = job->reply_payload.sg_cnt;
2000 info->sg = job->reply_payload.sg_list;
2002 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
2011 * fc_lport_ct_request() - Send CT Passthrough request
2012 * @job: The BSG Passthrough job
2013 * @lport: The local port sending the request
2014 * @did: The destination FC-ID
2015 * @tov: The timeout period to wait for the response
2017 * Locking Note: The lport lock is expected to be held before calling
2020 static int fc_lport_ct_request(struct fc_bsg_job *job,
2021 struct fc_lport *lport, u32 did, u32 tov)
2023 struct fc_bsg_info *info;
2024 struct fc_frame *fp;
2025 struct fc_frame_header *fh;
2026 struct fc_ct_req *ct;
2029 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
2030 job->request_payload.payload_len);
2034 len = job->request_payload.payload_len;
2035 ct = fc_frame_payload_get(fp, len);
2037 sg_copy_to_buffer(job->request_payload.sg_list,
2038 job->request_payload.sg_cnt,
2041 fh = fc_frame_header_get(fp);
2042 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
2043 hton24(fh->fh_d_id, did);
2044 hton24(fh->fh_s_id, lport->port_id);
2045 fh->fh_type = FC_TYPE_CT;
2046 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
2049 fh->fh_parm_offset = 0;
2051 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
2058 info->lport = lport;
2059 info->rsp_code = FC_FS_ACC;
2060 info->nents = job->reply_payload.sg_cnt;
2061 info->sg = job->reply_payload.sg_list;
2063 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
2072 * fc_lport_bsg_request() - The common entry point for sending
2073 * FC Passthrough requests
2074 * @job: The BSG passthrough job
2076 int fc_lport_bsg_request(struct fc_bsg_job *job)
2078 struct request *rsp = job->req->next_rq;
2079 struct Scsi_Host *shost = job->shost;
2080 struct fc_lport *lport = shost_priv(shost);
2081 struct fc_rport *rport;
2082 struct fc_rport_priv *rdata;
2086 job->reply->reply_payload_rcv_len = 0;
2088 rsp->resid_len = job->reply_payload.payload_len;
2090 mutex_lock(&lport->lp_mutex);
2092 switch (job->request->msgcode) {
2093 case FC_BSG_RPT_ELS:
2098 rdata = rport->dd_data;
2099 rc = fc_lport_els_request(job, lport, rport->port_id,
2108 rdata = rport->dd_data;
2109 rc = fc_lport_ct_request(job, lport, rport->port_id,
2114 did = ntoh24(job->request->rqst_data.h_ct.port_id);
2115 if (did == FC_FID_DIR_SERV)
2116 rdata = lport->dns_rdata;
2118 rdata = lport->tt.rport_lookup(lport, did);
2123 rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
2126 case FC_BSG_HST_ELS_NOLOGIN:
2127 did = ntoh24(job->request->rqst_data.h_els.port_id);
2128 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
2132 mutex_unlock(&lport->lp_mutex);
2135 EXPORT_SYMBOL(fc_lport_bsg_request);