1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2007 Intel Corporation. All rights reserved.
5 * Maintained at www.Open-FCoE.org
11 * These comments only apply to the 'port code' which consists of the lport,
12 * disc and rport blocks.
16 * The lport, disc and rport blocks all have mutexes that are used to protect
17 * those objects. The main motivation for these locks is to prevent from
18 * having an lport reset just before we send a frame. In that scenario the
19 * lport's FID would get set to zero and then we'd send a frame with an
20 * invalid SID. We also need to ensure that states don't change unexpectedly
21 * while processing another state.
25 * The following hierarchy defines the locking rules. A greater lock
26 * may be held before acquiring a lesser lock, but a lesser lock should never
27 * be held while attempting to acquire a greater lock. Here is the hierarchy-
29 * lport > disc, lport > rport, disc > rport
33 * The callbacks cause complications with this scheme. There is a callback
34 * from the rport (to either lport or disc) and a callback from disc
37 * As rports exit the rport state machine a callback is made to the owner of
38 * the rport to notify success or failure. Since the callback is likely to
39 * cause the lport or disc to grab its lock we cannot hold the rport lock
40 * while making the callback. To ensure that the rport is not free'd while
41 * processing the callback the rport callbacks are serialized through a
42 * single-threaded workqueue. An rport would never be free'd while in a
43 * callback handler because no other rport work in this queue can be executed
46 * When discovery succeeds or fails a callback is made to the lport as
47 * notification. Currently, successful discovery causes the lport to take no
48 * action. A failure will cause the lport to reset. There is likely a circular
49 * locking problem with this implementation.
55 * The critical sections protected by the lport's mutex are quite broad and
56 * may be improved upon in the future. The lport code and its locking doesn't
57 * influence the I/O path, so excessive locking doesn't penalize I/O
60 * The strategy is to lock whenever processing a request or response. Note
61 * that every _enter_* function corresponds to a state change. They generally
62 * change the lports state and then send a request out on the wire. We lock
63 * before calling any of these functions to protect that state change. This
64 * means that the entry points into the lport block manage the locks while
65 * the state machine can transition between states (i.e. _enter_* functions)
66 * while always staying protected.
68 * When handling responses we also hold the lport mutex broadly. When the
69 * lport receives the response frame it locks the mutex and then calls the
70 * appropriate handler for the particuar response. Generally a response will
71 * trigger a state change and so the lock must already be held.
73 * Retries also have to consider the locking. The retries occur from a work
74 * context and the work function will lock the lport and then retry the state
75 * (i.e. _enter_* function).
78 #include <linux/timer.h>
79 #include <linux/delay.h>
80 #include <linux/module.h>
81 #include <linux/slab.h>
82 #include <asm/unaligned.h>
84 #include <scsi/fc/fc_gs.h>
86 #include <scsi/libfc.h>
87 #include <linux/scatterlist.h>
89 #include "fc_encode.h"
92 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
93 #define FC_LOCAL_PTP_FID_LO 0x010101
94 #define FC_LOCAL_PTP_FID_HI 0x010102
96 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
97 #define MAX_CT_PAYLOAD 2048
98 #define DISCOVERED_PORTS 4
99 #define NUMBER_OF_PORTS 1
101 static void fc_lport_error(struct fc_lport *, struct fc_frame *);
103 static void fc_lport_enter_reset(struct fc_lport *);
104 static void fc_lport_enter_flogi(struct fc_lport *);
105 static void fc_lport_enter_dns(struct fc_lport *);
106 static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
107 static void fc_lport_enter_scr(struct fc_lport *);
108 static void fc_lport_enter_ready(struct fc_lport *);
109 static void fc_lport_enter_logo(struct fc_lport *);
110 static void fc_lport_enter_fdmi(struct fc_lport *lport);
111 static void fc_lport_enter_ms(struct fc_lport *, enum fc_lport_state);
113 static const char *fc_lport_state_names[] = {
114 [LPORT_ST_DISABLED] = "disabled",
115 [LPORT_ST_FLOGI] = "FLOGI",
116 [LPORT_ST_DNS] = "dNS",
117 [LPORT_ST_RNN_ID] = "RNN_ID",
118 [LPORT_ST_RSNN_NN] = "RSNN_NN",
119 [LPORT_ST_RSPN_ID] = "RSPN_ID",
120 [LPORT_ST_RFT_ID] = "RFT_ID",
121 [LPORT_ST_RFF_ID] = "RFF_ID",
122 [LPORT_ST_FDMI] = "FDMI",
123 [LPORT_ST_RHBA] = "RHBA",
124 [LPORT_ST_RPA] = "RPA",
125 [LPORT_ST_DHBA] = "DHBA",
126 [LPORT_ST_DPRT] = "DPRT",
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
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 occurred
168 * Locking Note: The rport lock should not be held when calling
171 static void fc_lport_rport_callback(struct fc_lport *lport,
172 struct fc_rport_priv *rdata,
173 enum fc_rport_event event)
175 FC_LPORT_DBG(lport, "Received a %d event for port (%6.6x)\n", event,
178 mutex_lock(&lport->lp_mutex);
181 if (lport->state == LPORT_ST_DNS) {
182 lport->dns_rdata = rdata;
183 fc_lport_enter_ns(lport, LPORT_ST_RNN_ID);
184 } else if (lport->state == LPORT_ST_FDMI) {
185 lport->ms_rdata = rdata;
186 fc_lport_enter_ms(lport, LPORT_ST_DHBA);
188 FC_LPORT_DBG(lport, "Received an READY event "
189 "on port (%6.6x) for the directory "
190 "server, but the lport is not "
191 "in the DNS or FDMI state, it's in the "
192 "%d state", rdata->ids.port_id,
194 fc_rport_logoff(rdata);
198 case RPORT_EV_FAILED:
200 if (rdata->ids.port_id == FC_FID_DIR_SERV)
201 lport->dns_rdata = NULL;
202 else if (rdata->ids.port_id == FC_FID_MGMT_SERV)
203 lport->ms_rdata = NULL;
208 mutex_unlock(&lport->lp_mutex);
212 * fc_lport_state() - Return a string which represents the lport's state
213 * @lport: The lport whose state is to converted to a string
215 static const char *fc_lport_state(struct fc_lport *lport)
219 cp = fc_lport_state_names[lport->state];
226 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
227 * @lport: The lport to attach the ptp rport to
228 * @remote_fid: The FID of the ptp rport
229 * @remote_wwpn: The WWPN of the ptp rport
230 * @remote_wwnn: The WWNN of the ptp rport
232 static void fc_lport_ptp_setup(struct fc_lport *lport,
233 u32 remote_fid, u64 remote_wwpn,
236 lockdep_assert_held(&lport->lp_mutex);
238 if (lport->ptp_rdata) {
239 fc_rport_logoff(lport->ptp_rdata);
240 kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
242 mutex_lock(&lport->disc.disc_mutex);
243 lport->ptp_rdata = fc_rport_create(lport, remote_fid);
244 kref_get(&lport->ptp_rdata->kref);
245 lport->ptp_rdata->ids.port_name = remote_wwpn;
246 lport->ptp_rdata->ids.node_name = remote_wwnn;
247 mutex_unlock(&lport->disc.disc_mutex);
249 fc_rport_login(lport->ptp_rdata);
251 fc_lport_enter_ready(lport);
255 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
256 * @shost: The SCSI host whose port state is to be determined
258 void fc_get_host_port_state(struct Scsi_Host *shost)
260 struct fc_lport *lport = shost_priv(shost);
262 mutex_lock(&lport->lp_mutex);
264 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
266 switch (lport->state) {
268 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
271 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
273 mutex_unlock(&lport->lp_mutex);
275 EXPORT_SYMBOL(fc_get_host_port_state);
278 * fc_get_host_speed() - Return the speed of the given Scsi_Host
279 * @shost: The SCSI host whose port speed is to be determined
281 void fc_get_host_speed(struct Scsi_Host *shost)
283 struct fc_lport *lport = shost_priv(shost);
285 fc_host_speed(shost) = lport->link_speed;
287 EXPORT_SYMBOL(fc_get_host_speed);
290 * fc_get_host_stats() - Return the Scsi_Host's statistics
291 * @shost: The SCSI host whose statistics are to be returned
293 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
295 struct fc_host_statistics *fc_stats;
296 struct fc_lport *lport = shost_priv(shost);
298 u64 fcp_in_bytes = 0;
299 u64 fcp_out_bytes = 0;
301 fc_stats = &lport->host_stats;
302 memset(fc_stats, 0, sizeof(struct fc_host_statistics));
304 fc_stats->seconds_since_last_reset = (jiffies - lport->boot_time) / HZ;
306 for_each_possible_cpu(cpu) {
307 struct fc_stats *stats;
309 stats = per_cpu_ptr(lport->stats, cpu);
311 fc_stats->tx_frames += READ_ONCE(stats->TxFrames);
312 fc_stats->tx_words += READ_ONCE(stats->TxWords);
313 fc_stats->rx_frames += READ_ONCE(stats->RxFrames);
314 fc_stats->rx_words += READ_ONCE(stats->RxWords);
315 fc_stats->error_frames += READ_ONCE(stats->ErrorFrames);
316 fc_stats->invalid_crc_count += READ_ONCE(stats->InvalidCRCCount);
317 fc_stats->fcp_input_requests += READ_ONCE(stats->InputRequests);
318 fc_stats->fcp_output_requests += READ_ONCE(stats->OutputRequests);
319 fc_stats->fcp_control_requests += READ_ONCE(stats->ControlRequests);
320 fcp_in_bytes += READ_ONCE(stats->InputBytes);
321 fcp_out_bytes += READ_ONCE(stats->OutputBytes);
322 fc_stats->fcp_packet_alloc_failures += READ_ONCE(stats->FcpPktAllocFails);
323 fc_stats->fcp_packet_aborts += READ_ONCE(stats->FcpPktAborts);
324 fc_stats->fcp_frame_alloc_failures += READ_ONCE(stats->FcpFrameAllocFails);
325 fc_stats->link_failure_count += READ_ONCE(stats->LinkFailureCount);
327 fc_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
328 fc_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
329 fc_stats->lip_count = -1;
330 fc_stats->nos_count = -1;
331 fc_stats->loss_of_sync_count = -1;
332 fc_stats->loss_of_signal_count = -1;
333 fc_stats->prim_seq_protocol_err_count = -1;
334 fc_stats->dumped_frames = -1;
336 /* update exches stats */
337 fc_exch_update_stats(lport);
341 EXPORT_SYMBOL(fc_get_host_stats);
344 * fc_lport_flogi_fill() - Fill in FLOGI command for request
345 * @lport: The local port the FLOGI is for
346 * @flogi: The FLOGI command
349 static void fc_lport_flogi_fill(struct fc_lport *lport,
350 struct fc_els_flogi *flogi,
353 struct fc_els_csp *sp;
354 struct fc_els_cssp *cp;
356 memset(flogi, 0, sizeof(*flogi));
357 flogi->fl_cmd = (u8) op;
358 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
359 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
361 sp->sp_hi_ver = 0x20;
362 sp->sp_lo_ver = 0x20;
363 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
364 sp->sp_bb_data = htons((u16) lport->mfs);
365 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
366 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
367 if (op != ELS_FLOGI) {
368 sp->sp_features = htons(FC_SP_FT_CIRO);
369 sp->sp_tot_seq = htons(255); /* seq. we accept */
370 sp->sp_rel_off = htons(0x1f);
371 sp->sp_e_d_tov = htonl(lport->e_d_tov);
373 cp->cp_rdfs = htons((u16) lport->mfs);
374 cp->cp_con_seq = htons(255);
380 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
381 * @lport: The local port to add a new FC-4 type to
382 * @type: The new FC-4 type
384 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
388 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
389 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
393 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
394 * @lport: Fibre Channel local port receiving the RLIR
395 * @fp: The RLIR request frame
397 static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
399 lockdep_assert_held(&lport->lp_mutex);
401 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
402 fc_lport_state(lport));
404 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
409 * fc_lport_recv_echo_req() - Handle received ECHO request
410 * @lport: The local port receiving the ECHO
411 * @in_fp: ECHO request frame
413 static void fc_lport_recv_echo_req(struct fc_lport *lport,
414 struct fc_frame *in_fp)
421 lockdep_assert_held(&lport->lp_mutex);
423 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
424 fc_lport_state(lport));
426 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
427 pp = fc_frame_payload_get(in_fp, len);
429 if (len < sizeof(__be32))
430 len = sizeof(__be32);
432 fp = fc_frame_alloc(lport, len);
434 dp = fc_frame_payload_get(fp, len);
436 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
437 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
438 lport->tt.frame_send(lport, fp);
440 fc_frame_free(in_fp);
444 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
445 * @lport: The local port receiving the RNID
446 * @in_fp: The RNID request frame
448 static void fc_lport_recv_rnid_req(struct fc_lport *lport,
449 struct fc_frame *in_fp)
452 struct fc_els_rnid *req;
454 struct fc_els_rnid_resp rnid;
455 struct fc_els_rnid_cid cid;
456 struct fc_els_rnid_gen gen;
458 struct fc_seq_els_data rjt_data;
462 lockdep_assert_held(&lport->lp_mutex);
464 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
465 fc_lport_state(lport));
467 req = fc_frame_payload_get(in_fp, sizeof(*req));
469 rjt_data.reason = ELS_RJT_LOGIC;
470 rjt_data.explan = ELS_EXPL_NONE;
471 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
475 if (fmt != ELS_RNIDF_GEN ||
476 ntohl(lport->rnid_gen.rnid_atype) == 0) {
477 fmt = ELS_RNIDF_NONE; /* nothing to provide */
478 len -= sizeof(rp->gen);
480 fp = fc_frame_alloc(lport, len);
482 rp = fc_frame_payload_get(fp, len);
484 rp->rnid.rnid_cmd = ELS_LS_ACC;
485 rp->rnid.rnid_fmt = fmt;
486 rp->rnid.rnid_cid_len = sizeof(rp->cid);
487 rp->cid.rnid_wwpn = htonll(lport->wwpn);
488 rp->cid.rnid_wwnn = htonll(lport->wwnn);
489 if (fmt == ELS_RNIDF_GEN) {
490 rp->rnid.rnid_sid_len = sizeof(rp->gen);
491 memcpy(&rp->gen, &lport->rnid_gen,
494 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
495 lport->tt.frame_send(lport, fp);
498 fc_frame_free(in_fp);
502 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
503 * @lport: The local port receiving the LOGO
504 * @fp: The LOGO request frame
506 static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
508 lockdep_assert_held(&lport->lp_mutex);
510 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
511 fc_lport_enter_reset(lport);
516 * fc_fabric_login() - Start the lport state machine
517 * @lport: The local port that should log into the fabric
519 * Locking Note: This function should not be called
520 * with the lport lock held.
522 int fc_fabric_login(struct fc_lport *lport)
526 mutex_lock(&lport->lp_mutex);
527 if (lport->state == LPORT_ST_DISABLED ||
528 lport->state == LPORT_ST_LOGO) {
529 fc_lport_state_enter(lport, LPORT_ST_RESET);
530 fc_lport_enter_reset(lport);
533 mutex_unlock(&lport->lp_mutex);
537 EXPORT_SYMBOL(fc_fabric_login);
540 * __fc_linkup() - Handler for transport linkup events
541 * @lport: The lport whose link is up
543 void __fc_linkup(struct fc_lport *lport)
545 lockdep_assert_held(&lport->lp_mutex);
547 if (!lport->link_up) {
550 if (lport->state == LPORT_ST_RESET)
551 fc_lport_enter_flogi(lport);
556 * fc_linkup() - Handler for transport linkup events
557 * @lport: The local port whose link is up
559 void fc_linkup(struct fc_lport *lport)
561 printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
562 lport->host->host_no, lport->port_id);
564 mutex_lock(&lport->lp_mutex);
566 mutex_unlock(&lport->lp_mutex);
568 EXPORT_SYMBOL(fc_linkup);
571 * __fc_linkdown() - Handler for transport linkdown events
572 * @lport: The lport whose link is down
574 void __fc_linkdown(struct fc_lport *lport)
576 lockdep_assert_held(&lport->lp_mutex);
578 if (lport->link_up) {
580 fc_lport_enter_reset(lport);
581 lport->tt.fcp_cleanup(lport);
586 * fc_linkdown() - Handler for transport linkdown events
587 * @lport: The local port whose link is down
589 void fc_linkdown(struct fc_lport *lport)
591 printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
592 lport->host->host_no, lport->port_id);
594 mutex_lock(&lport->lp_mutex);
595 __fc_linkdown(lport);
596 mutex_unlock(&lport->lp_mutex);
598 EXPORT_SYMBOL(fc_linkdown);
601 * fc_fabric_logoff() - Logout of the fabric
602 * @lport: The local port to logoff the fabric
605 * 0 for success, -1 for failure
607 int fc_fabric_logoff(struct fc_lport *lport)
609 lport->tt.disc_stop_final(lport);
610 mutex_lock(&lport->lp_mutex);
611 if (lport->dns_rdata)
612 fc_rport_logoff(lport->dns_rdata);
613 mutex_unlock(&lport->lp_mutex);
614 fc_rport_flush_queue();
615 mutex_lock(&lport->lp_mutex);
616 fc_lport_enter_logo(lport);
617 mutex_unlock(&lport->lp_mutex);
618 cancel_delayed_work_sync(&lport->retry_work);
621 EXPORT_SYMBOL(fc_fabric_logoff);
624 * fc_lport_destroy() - Unregister a fc_lport
625 * @lport: The local port to unregister
628 * exit routine for fc_lport instance
629 * clean-up all the allocated memory
630 * and free up other system resources.
633 int fc_lport_destroy(struct fc_lport *lport)
635 mutex_lock(&lport->lp_mutex);
636 lport->state = LPORT_ST_DISABLED;
638 lport->tt.frame_send = fc_frame_drop;
639 mutex_unlock(&lport->lp_mutex);
641 lport->tt.fcp_abort_io(lport);
642 lport->tt.disc_stop_final(lport);
643 lport->tt.exch_mgr_reset(lport, 0, 0);
644 cancel_delayed_work_sync(&lport->retry_work);
645 fc_fc4_del_lport(lport);
648 EXPORT_SYMBOL(fc_lport_destroy);
651 * fc_set_mfs() - Set the maximum frame size for a local port
652 * @lport: The local port to set the MFS for
655 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
657 unsigned int old_mfs;
660 mutex_lock(&lport->lp_mutex);
662 old_mfs = lport->mfs;
664 if (mfs >= FC_MIN_MAX_FRAME) {
666 if (mfs > FC_MAX_FRAME)
668 mfs -= sizeof(struct fc_frame_header);
673 if (!rc && mfs < old_mfs)
674 fc_lport_enter_reset(lport);
676 mutex_unlock(&lport->lp_mutex);
680 EXPORT_SYMBOL(fc_set_mfs);
683 * fc_lport_disc_callback() - Callback for discovery events
684 * @lport: The local port receiving the event
685 * @event: The discovery event
687 static void fc_lport_disc_callback(struct fc_lport *lport,
688 enum fc_disc_event event)
691 case DISC_EV_SUCCESS:
692 FC_LPORT_DBG(lport, "Discovery succeeded\n");
695 printk(KERN_ERR "host%d: libfc: "
696 "Discovery failed for port (%6.6x)\n",
697 lport->host->host_no, lport->port_id);
698 mutex_lock(&lport->lp_mutex);
699 fc_lport_enter_reset(lport);
700 mutex_unlock(&lport->lp_mutex);
709 * fc_lport_enter_ready() - Enter the ready state and start discovery
710 * @lport: The local port that is ready
712 static void fc_lport_enter_ready(struct fc_lport *lport)
714 lockdep_assert_held(&lport->lp_mutex);
716 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
717 fc_lport_state(lport));
719 fc_lport_state_enter(lport, LPORT_ST_READY);
721 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
722 fc_vports_linkchange(lport);
724 if (!lport->ptp_rdata)
725 lport->tt.disc_start(fc_lport_disc_callback, lport);
729 * fc_lport_set_port_id() - set the local port Port ID
730 * @lport: The local port which will have its Port ID set.
731 * @port_id: The new port ID.
732 * @fp: The frame containing the incoming request, or NULL.
734 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
737 lockdep_assert_held(&lport->lp_mutex);
740 printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
741 lport->host->host_no, port_id);
743 lport->port_id = port_id;
745 /* Update the fc_host */
746 fc_host_port_id(lport->host) = port_id;
748 if (lport->tt.lport_set_port_id)
749 lport->tt.lport_set_port_id(lport, port_id, fp);
753 * fc_lport_set_local_id() - set the local port Port ID for point-to-multipoint
754 * @lport: The local port which will have its Port ID set.
755 * @port_id: The new port ID.
757 * Called by the lower-level driver when transport sets the local port_id.
758 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
759 * discovery to be skipped.
761 void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
763 mutex_lock(&lport->lp_mutex);
765 fc_lport_set_port_id(lport, port_id, NULL);
767 switch (lport->state) {
771 fc_lport_enter_ready(lport);
776 mutex_unlock(&lport->lp_mutex);
778 EXPORT_SYMBOL(fc_lport_set_local_id);
781 * fc_lport_recv_flogi_req() - Receive a FLOGI request
782 * @lport: The local port that received the request
783 * @rx_fp: The FLOGI frame
785 * A received FLOGI request indicates a point-to-point connection.
786 * Accept it with the common service parameters indicating our N port.
787 * Set up to do a PLOGI if we have the higher-number WWPN.
789 static void fc_lport_recv_flogi_req(struct fc_lport *lport,
790 struct fc_frame *rx_fp)
793 struct fc_frame_header *fh;
794 struct fc_els_flogi *flp;
795 struct fc_els_flogi *new_flp;
800 lockdep_assert_held(&lport->lp_mutex);
802 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
803 fc_lport_state(lport));
805 remote_fid = fc_frame_sid(rx_fp);
806 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
809 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
810 if (remote_wwpn == lport->wwpn) {
811 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
812 "with same WWPN %16.16llx\n",
813 lport->host->host_no, remote_wwpn);
816 FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
819 * XXX what is the right thing to do for FIDs?
820 * The originator might expect our S_ID to be 0xfffffe.
821 * But if so, both of us could end up with the same FID.
823 local_fid = FC_LOCAL_PTP_FID_LO;
824 if (remote_wwpn < lport->wwpn) {
825 local_fid = FC_LOCAL_PTP_FID_HI;
826 if (!remote_fid || remote_fid == local_fid)
827 remote_fid = FC_LOCAL_PTP_FID_LO;
828 } else if (!remote_fid) {
829 remote_fid = FC_LOCAL_PTP_FID_HI;
832 fc_lport_set_port_id(lport, local_fid, rx_fp);
834 fp = fc_frame_alloc(lport, sizeof(*flp));
836 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
837 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
838 new_flp->fl_cmd = (u8) ELS_LS_ACC;
841 * Send the response. If this fails, the originator should
842 * repeat the sequence.
844 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
845 fh = fc_frame_header_get(fp);
846 hton24(fh->fh_s_id, local_fid);
847 hton24(fh->fh_d_id, remote_fid);
848 lport->tt.frame_send(lport, fp);
851 fc_lport_error(lport, fp);
853 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
854 get_unaligned_be64(&flp->fl_wwnn));
856 fc_frame_free(rx_fp);
860 * fc_lport_recv_els_req() - The generic lport ELS request handler
861 * @lport: The local port that received the request
862 * @fp: The request frame
864 * This function will see if the lport handles the request or
865 * if an rport should handle the request.
867 * Locking Note: This function should not be called with the lport
868 * lock held because it will grab the lock.
870 static void fc_lport_recv_els_req(struct fc_lport *lport,
873 mutex_lock(&lport->lp_mutex);
876 * Handle special ELS cases like FLOGI, LOGO, and
877 * RSCN here. These don't require a session.
878 * Even if we had a session, it might not be ready.
886 switch (fc_frame_payload_op(fp)) {
888 if (!lport->point_to_multipoint)
889 fc_lport_recv_flogi_req(lport, fp);
891 fc_rport_recv_req(lport, fp);
894 if (fc_frame_sid(fp) == FC_FID_FLOGI)
895 fc_lport_recv_logo_req(lport, fp);
897 fc_rport_recv_req(lport, fp);
900 lport->tt.disc_recv_req(lport, fp);
903 fc_lport_recv_echo_req(lport, fp);
906 fc_lport_recv_rlir_req(lport, fp);
909 fc_lport_recv_rnid_req(lport, fp);
912 fc_rport_recv_req(lport, fp);
916 mutex_unlock(&lport->lp_mutex);
919 static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
920 const struct fc_els_spp *spp_in,
921 struct fc_els_spp *spp_out)
923 return FC_SPP_RESP_INVL;
926 struct fc4_prov fc_lport_els_prov = {
927 .prli = fc_lport_els_prli,
928 .recv = fc_lport_recv_els_req,
932 * fc_lport_recv() - The generic lport request handler
933 * @lport: The lport that received the request
934 * @fp: The frame the request is in
936 * Locking Note: This function should not be called with the lport
937 * lock held because it may grab the lock.
939 void fc_lport_recv(struct fc_lport *lport, struct fc_frame *fp)
941 struct fc_frame_header *fh = fc_frame_header_get(fp);
942 struct fc_seq *sp = fr_seq(fp);
943 struct fc4_prov *prov;
946 * Use RCU read lock and module_lock to be sure module doesn't
947 * deregister and get unloaded while we're calling it.
948 * try_module_get() is inlined and accepts a NULL parameter.
949 * Only ELSes and FCP target ops should come through here.
950 * The locking is unfortunate, and a better scheme is being sought.
954 if (fh->fh_type >= FC_FC4_PROV_SIZE)
956 prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
957 if (!prov || !try_module_get(prov->module))
960 prov->recv(lport, fp);
961 module_put(prov->module);
965 FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
970 EXPORT_SYMBOL(fc_lport_recv);
973 * fc_lport_reset() - Reset a local port
974 * @lport: The local port which should be reset
976 * Locking Note: This functions should not be called with the
979 int fc_lport_reset(struct fc_lport *lport)
981 cancel_delayed_work_sync(&lport->retry_work);
982 mutex_lock(&lport->lp_mutex);
983 fc_lport_enter_reset(lport);
984 mutex_unlock(&lport->lp_mutex);
987 EXPORT_SYMBOL(fc_lport_reset);
990 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
991 * @lport: The local port to be reset
993 static void fc_lport_reset_locked(struct fc_lport *lport)
995 lockdep_assert_held(&lport->lp_mutex);
997 if (lport->dns_rdata) {
998 fc_rport_logoff(lport->dns_rdata);
999 lport->dns_rdata = NULL;
1002 if (lport->ptp_rdata) {
1003 fc_rport_logoff(lport->ptp_rdata);
1004 kref_put(&lport->ptp_rdata->kref, fc_rport_destroy);
1005 lport->ptp_rdata = NULL;
1008 lport->tt.disc_stop(lport);
1010 lport->tt.exch_mgr_reset(lport, 0, 0);
1011 fc_host_fabric_name(lport->host) = 0;
1013 if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
1014 fc_lport_set_port_id(lport, 0, NULL);
1018 * fc_lport_enter_reset() - Reset the local port
1019 * @lport: The local port to be reset
1021 static void fc_lport_enter_reset(struct fc_lport *lport)
1023 lockdep_assert_held(&lport->lp_mutex);
1025 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
1026 fc_lport_state(lport));
1028 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
1033 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
1035 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
1037 fc_lport_state_enter(lport, LPORT_ST_RESET);
1038 fc_host_post_event(lport->host, fc_get_event_number(),
1039 FCH_EVT_LIPRESET, 0);
1040 fc_vports_linkchange(lport);
1041 fc_lport_reset_locked(lport);
1043 fc_lport_enter_flogi(lport);
1047 * fc_lport_enter_disabled() - Disable the local port
1048 * @lport: The local port to be reset
1050 static void fc_lport_enter_disabled(struct fc_lport *lport)
1052 lockdep_assert_held(&lport->lp_mutex);
1054 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1055 fc_lport_state(lport));
1057 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1058 fc_vports_linkchange(lport);
1059 fc_lport_reset_locked(lport);
1063 * fc_lport_error() - Handler for any errors
1064 * @lport: The local port that the error was on
1065 * @fp: The error code encoded in a frame pointer
1067 * If the error was caused by a resource allocation failure
1068 * then wait for half a second and retry, otherwise retry
1069 * after the e_d_tov time.
1071 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1073 unsigned long delay = 0;
1074 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1075 IS_ERR(fp) ? -PTR_ERR(fp) : 0, fc_lport_state(lport),
1076 lport->retry_count);
1078 if (PTR_ERR(fp) == -FC_EX_CLOSED)
1082 * Memory allocation failure, or the exchange timed out
1083 * or we received LS_RJT.
1086 if (lport->retry_count < lport->max_retry_count) {
1087 lport->retry_count++;
1089 delay = msecs_to_jiffies(500);
1091 delay = msecs_to_jiffies(lport->e_d_tov);
1093 schedule_delayed_work(&lport->retry_work, delay);
1095 fc_lport_enter_reset(lport);
1099 * fc_lport_ns_resp() - Handle response to a name server
1100 * registration exchange
1101 * @sp: current sequence in exchange
1102 * @fp: response frame
1103 * @lp_arg: Fibre Channel host port instance
1105 * Locking Note: This function will be called without the lport lock
1106 * held, but it will lock, call an _enter_* function or fc_lport_error()
1107 * and then unlock the lport.
1109 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1112 struct fc_lport *lport = lp_arg;
1113 struct fc_frame_header *fh;
1114 struct fc_ct_hdr *ct;
1116 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1118 if (fp == ERR_PTR(-FC_EX_CLOSED))
1121 mutex_lock(&lport->lp_mutex);
1123 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1124 FC_LPORT_DBG(lport, "Received a name server response, "
1125 "but in state %s\n", fc_lport_state(lport));
1132 fc_lport_error(lport, fp);
1136 fh = fc_frame_header_get(fp);
1137 ct = fc_frame_payload_get(fp, sizeof(*ct));
1139 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1140 ct->ct_fs_type == FC_FST_DIR &&
1141 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1142 ntohs(ct->ct_cmd) == FC_FS_ACC)
1143 switch (lport->state) {
1144 case LPORT_ST_RNN_ID:
1145 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1147 case LPORT_ST_RSNN_NN:
1148 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1150 case LPORT_ST_RSPN_ID:
1151 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1153 case LPORT_ST_RFT_ID:
1154 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1156 case LPORT_ST_RFF_ID:
1157 if (lport->fdmi_enabled)
1158 fc_lport_enter_fdmi(lport);
1160 fc_lport_enter_scr(lport);
1163 /* should have already been caught by state checks */
1167 fc_lport_error(lport, fp);
1171 mutex_unlock(&lport->lp_mutex);
1175 * fc_lport_ms_resp() - Handle response to a management server
1177 * @sp: current sequence in exchange
1178 * @fp: response frame
1179 * @lp_arg: Fibre Channel host port instance
1181 * Locking Note: This function will be called without the lport lock
1182 * held, but it will lock, call an _enter_* function or fc_lport_error()
1183 * and then unlock the lport.
1185 static void fc_lport_ms_resp(struct fc_seq *sp, struct fc_frame *fp,
1188 struct fc_lport *lport = lp_arg;
1189 struct fc_frame_header *fh;
1190 struct fc_ct_hdr *ct;
1191 struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1192 FC_LPORT_DBG(lport, "Received a ms %s\n", fc_els_resp_type(fp));
1194 if (fp == ERR_PTR(-FC_EX_CLOSED))
1197 mutex_lock(&lport->lp_mutex);
1199 if (lport->state < LPORT_ST_RHBA || lport->state > LPORT_ST_DPRT) {
1200 FC_LPORT_DBG(lport, "Received a management server response, "
1201 "but in state %s\n", fc_lport_state(lport));
1208 fc_lport_error(lport, fp);
1212 fh = fc_frame_header_get(fp);
1213 ct = fc_frame_payload_get(fp, sizeof(*ct));
1215 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1216 ct->ct_fs_type == FC_FST_MGMT &&
1217 ct->ct_fs_subtype == FC_FDMI_SUBTYPE) {
1218 FC_LPORT_DBG(lport, "Received a management server response, "
1219 "reason=%d explain=%d\n",
1223 switch (lport->state) {
1225 if ((ntohs(ct->ct_cmd) == FC_FS_RJT) && fc_host->fdmi_version == FDMI_V2) {
1226 FC_LPORT_DBG(lport, "Error for FDMI-V2, fall back to FDMI-V1\n");
1227 fc_host->fdmi_version = FDMI_V1;
1229 fc_lport_enter_ms(lport, LPORT_ST_RHBA);
1231 } else if (ntohs(ct->ct_cmd) == FC_FS_ACC)
1232 fc_lport_enter_ms(lport, LPORT_ST_RPA);
1233 else /* Error Skip RPA */
1234 fc_lport_enter_scr(lport);
1237 fc_lport_enter_scr(lport);
1240 fc_lport_enter_ms(lport, LPORT_ST_RHBA);
1243 fc_lport_enter_ms(lport, LPORT_ST_DPRT);
1246 /* should have already been caught by state checks */
1250 /* Invalid Frame? */
1251 fc_lport_error(lport, fp);
1256 mutex_unlock(&lport->lp_mutex);
1260 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1261 * @sp: current sequence in SCR exchange
1262 * @fp: response frame
1263 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1265 * Locking Note: This function will be called without the lport lock
1266 * held, but it will lock, call an _enter_* function or fc_lport_error
1267 * and then unlock the lport.
1269 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1272 struct fc_lport *lport = lp_arg;
1275 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1277 if (fp == ERR_PTR(-FC_EX_CLOSED))
1280 mutex_lock(&lport->lp_mutex);
1282 if (lport->state != LPORT_ST_SCR) {
1283 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1284 "%s\n", fc_lport_state(lport));
1291 fc_lport_error(lport, fp);
1295 op = fc_frame_payload_op(fp);
1296 if (op == ELS_LS_ACC)
1297 fc_lport_enter_ready(lport);
1299 fc_lport_error(lport, fp);
1304 mutex_unlock(&lport->lp_mutex);
1308 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1309 * @lport: The local port to register for state changes
1311 static void fc_lport_enter_scr(struct fc_lport *lport)
1313 struct fc_frame *fp;
1315 lockdep_assert_held(&lport->lp_mutex);
1317 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1318 fc_lport_state(lport));
1320 fc_lport_state_enter(lport, LPORT_ST_SCR);
1322 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1324 fc_lport_error(lport, fp);
1328 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1329 fc_lport_scr_resp, lport,
1330 2 * lport->r_a_tov))
1331 fc_lport_error(lport, NULL);
1335 * fc_lport_enter_ns() - register some object with the name server
1336 * @lport: Fibre Channel local port to register
1337 * @state: Local port state
1339 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1341 struct fc_frame *fp;
1343 int size = sizeof(struct fc_ct_hdr);
1346 lockdep_assert_held(&lport->lp_mutex);
1348 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1349 fc_lport_state_names[state],
1350 fc_lport_state(lport));
1352 fc_lport_state_enter(lport, state);
1355 case LPORT_ST_RNN_ID:
1357 size += sizeof(struct fc_ns_rn_id);
1359 case LPORT_ST_RSNN_NN:
1360 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1361 /* if there is no symbolic name, skip to RFT_ID */
1363 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1364 cmd = FC_NS_RSNN_NN;
1365 size += sizeof(struct fc_ns_rsnn) + len;
1367 case LPORT_ST_RSPN_ID:
1368 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1369 /* if there is no symbolic name, skip to RFT_ID */
1371 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1372 cmd = FC_NS_RSPN_ID;
1373 size += sizeof(struct fc_ns_rspn) + len;
1375 case LPORT_ST_RFT_ID:
1377 size += sizeof(struct fc_ns_rft);
1379 case LPORT_ST_RFF_ID:
1381 size += sizeof(struct fc_ns_rff_id);
1384 fc_lport_error(lport, NULL);
1388 fp = fc_frame_alloc(lport, size);
1390 fc_lport_error(lport, fp);
1394 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1396 lport, 3 * lport->r_a_tov))
1397 fc_lport_error(lport, fp);
1400 static struct fc_rport_operations fc_lport_rport_ops = {
1401 .event_callback = fc_lport_rport_callback,
1405 * fc_lport_enter_dns() - Create a fc_rport for the name server
1406 * @lport: The local port requesting a remote port for the name server
1408 static void fc_lport_enter_dns(struct fc_lport *lport)
1410 struct fc_rport_priv *rdata;
1412 lockdep_assert_held(&lport->lp_mutex);
1414 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1415 fc_lport_state(lport));
1417 fc_lport_state_enter(lport, LPORT_ST_DNS);
1419 mutex_lock(&lport->disc.disc_mutex);
1420 rdata = fc_rport_create(lport, FC_FID_DIR_SERV);
1421 mutex_unlock(&lport->disc.disc_mutex);
1425 rdata->ops = &fc_lport_rport_ops;
1426 fc_rport_login(rdata);
1430 fc_lport_error(lport, NULL);
1434 * fc_lport_enter_ms() - management server commands
1435 * @lport: Fibre Channel local port to register
1436 * @state: Local port state
1438 static void fc_lport_enter_ms(struct fc_lport *lport, enum fc_lport_state state)
1440 struct fc_frame *fp;
1441 enum fc_fdmi_req cmd;
1442 int size = sizeof(struct fc_ct_hdr);
1445 struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1446 lockdep_assert_held(&lport->lp_mutex);
1448 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1449 fc_lport_state_names[state],
1450 fc_lport_state(lport));
1452 fc_lport_state_enter(lport, state);
1457 /* Number of HBA Attributes */
1459 len = sizeof(struct fc_fdmi_rhba);
1460 len -= sizeof(struct fc_fdmi_attr_entry);
1462 len += FC_FDMI_HBA_ATTR_NODENAME_LEN;
1463 len += FC_FDMI_HBA_ATTR_MANUFACTURER_LEN;
1464 len += FC_FDMI_HBA_ATTR_SERIALNUMBER_LEN;
1465 len += FC_FDMI_HBA_ATTR_MODEL_LEN;
1466 len += FC_FDMI_HBA_ATTR_MODELDESCR_LEN;
1467 len += FC_FDMI_HBA_ATTR_HARDWAREVERSION_LEN;
1468 len += FC_FDMI_HBA_ATTR_DRIVERVERSION_LEN;
1469 len += FC_FDMI_HBA_ATTR_OPTIONROMVERSION_LEN;
1470 len += FC_FDMI_HBA_ATTR_FIRMWAREVERSION_LEN;
1471 len += FC_FDMI_HBA_ATTR_OSNAMEVERSION_LEN;
1472 len += FC_FDMI_HBA_ATTR_MAXCTPAYLOAD_LEN;
1475 if (fc_host->fdmi_version == FDMI_V2) {
1477 len += FC_FDMI_HBA_ATTR_NODESYMBLNAME_LEN;
1478 len += FC_FDMI_HBA_ATTR_VENDORSPECIFICINFO_LEN;
1479 len += FC_FDMI_HBA_ATTR_NUMBEROFPORTS_LEN;
1480 len += FC_FDMI_HBA_ATTR_FABRICNAME_LEN;
1481 len += FC_FDMI_HBA_ATTR_BIOSVERSION_LEN;
1482 len += FC_FDMI_HBA_ATTR_BIOSSTATE_LEN;
1483 len += FC_FDMI_HBA_ATTR_VENDORIDENTIFIER_LEN;
1486 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1492 /* Number of Port Attributes */
1494 len = sizeof(struct fc_fdmi_rpa);
1495 len -= sizeof(struct fc_fdmi_attr_entry);
1496 len += FC_FDMI_PORT_ATTR_FC4TYPES_LEN;
1497 len += FC_FDMI_PORT_ATTR_SUPPORTEDSPEED_LEN;
1498 len += FC_FDMI_PORT_ATTR_CURRENTPORTSPEED_LEN;
1499 len += FC_FDMI_PORT_ATTR_MAXFRAMESIZE_LEN;
1500 len += FC_FDMI_PORT_ATTR_OSDEVICENAME_LEN;
1501 len += FC_FDMI_PORT_ATTR_HOSTNAME_LEN;
1503 if (fc_host->fdmi_version == FDMI_V2) {
1505 len += FC_FDMI_PORT_ATTR_NODENAME_LEN;
1506 len += FC_FDMI_PORT_ATTR_PORTNAME_LEN;
1507 len += FC_FDMI_PORT_ATTR_SYMBOLICNAME_LEN;
1508 len += FC_FDMI_PORT_ATTR_PORTTYPE_LEN;
1509 len += FC_FDMI_PORT_ATTR_SUPPORTEDCLASSSRVC_LEN;
1510 len += FC_FDMI_PORT_ATTR_FABRICNAME_LEN;
1511 len += FC_FDMI_PORT_ATTR_CURRENTFC4TYPE_LEN;
1512 len += FC_FDMI_PORT_ATTR_PORTSTATE_LEN;
1513 len += FC_FDMI_PORT_ATTR_DISCOVEREDPORTS_LEN;
1514 len += FC_FDMI_PORT_ATTR_PORTID_LEN;
1517 len += (numattrs * FC_FDMI_ATTR_ENTRY_HEADER_LEN);
1523 len = sizeof(struct fc_fdmi_dprt);
1528 len = sizeof(struct fc_fdmi_dhba);
1532 fc_lport_error(lport, NULL);
1536 FC_LPORT_DBG(lport, "Cmd=0x%x Len %d size %d\n",
1537 cmd, (int)len, size);
1538 fp = fc_frame_alloc(lport, size);
1540 fc_lport_error(lport, fp);
1544 if (!lport->tt.elsct_send(lport, FC_FID_MGMT_SERV, fp, cmd,
1546 lport, 3 * lport->r_a_tov))
1547 fc_lport_error(lport, fp);
1551 * fc_lport_enter_fdmi() - Create a fc_rport for the management server
1552 * @lport: The local port requesting a remote port for the management server
1554 static void fc_lport_enter_fdmi(struct fc_lport *lport)
1556 struct fc_rport_priv *rdata;
1558 lockdep_assert_held(&lport->lp_mutex);
1560 FC_LPORT_DBG(lport, "Entered FDMI state from %s state\n",
1561 fc_lport_state(lport));
1563 fc_lport_state_enter(lport, LPORT_ST_FDMI);
1565 mutex_lock(&lport->disc.disc_mutex);
1566 rdata = fc_rport_create(lport, FC_FID_MGMT_SERV);
1567 mutex_unlock(&lport->disc.disc_mutex);
1571 rdata->ops = &fc_lport_rport_ops;
1572 fc_rport_login(rdata);
1576 fc_lport_error(lport, NULL);
1580 * fc_lport_timeout() - Handler for the retry_work timer
1581 * @work: The work struct of the local port
1583 static void fc_lport_timeout(struct work_struct *work)
1585 struct fc_lport *lport =
1586 container_of(work, struct fc_lport,
1588 struct fc_host_attrs *fc_host = shost_to_fc_host(lport->host);
1590 mutex_lock(&lport->lp_mutex);
1592 switch (lport->state) {
1593 case LPORT_ST_DISABLED:
1595 case LPORT_ST_READY:
1597 case LPORT_ST_RESET:
1599 case LPORT_ST_FLOGI:
1600 fc_lport_enter_flogi(lport);
1603 fc_lport_enter_dns(lport);
1605 case LPORT_ST_RNN_ID:
1606 case LPORT_ST_RSNN_NN:
1607 case LPORT_ST_RSPN_ID:
1608 case LPORT_ST_RFT_ID:
1609 case LPORT_ST_RFF_ID:
1610 fc_lport_enter_ns(lport, lport->state);
1613 fc_lport_enter_fdmi(lport);
1616 if (fc_host->fdmi_version == FDMI_V2) {
1617 FC_LPORT_DBG(lport, "timeout for FDMI-V2 RHBA,fall back to FDMI-V1\n");
1618 fc_host->fdmi_version = FDMI_V1;
1619 fc_lport_enter_ms(lport, LPORT_ST_RHBA);
1626 FC_LPORT_DBG(lport, "Skipping lport state %s to SCR\n",
1627 fc_lport_state(lport));
1630 fc_lport_enter_scr(lport);
1633 fc_lport_enter_logo(lport);
1637 mutex_unlock(&lport->lp_mutex);
1641 * fc_lport_logo_resp() - Handle response to LOGO request
1642 * @sp: The sequence that the LOGO was on
1643 * @fp: The LOGO frame
1644 * @lp_arg: The lport port that received the LOGO request
1646 * Locking Note: This function will be called without the lport lock
1647 * held, but it will lock, call an _enter_* function or fc_lport_error()
1648 * and then unlock the lport.
1650 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1653 struct fc_lport *lport = lp_arg;
1656 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1658 if (fp == ERR_PTR(-FC_EX_CLOSED))
1661 mutex_lock(&lport->lp_mutex);
1663 if (lport->state != LPORT_ST_LOGO) {
1664 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1665 "%s\n", fc_lport_state(lport));
1672 fc_lport_error(lport, fp);
1676 op = fc_frame_payload_op(fp);
1677 if (op == ELS_LS_ACC)
1678 fc_lport_enter_disabled(lport);
1680 fc_lport_error(lport, fp);
1685 mutex_unlock(&lport->lp_mutex);
1687 EXPORT_SYMBOL(fc_lport_logo_resp);
1690 * fc_lport_enter_logo() - Logout of the fabric
1691 * @lport: The local port to be logged out
1693 static void fc_lport_enter_logo(struct fc_lport *lport)
1695 struct fc_frame *fp;
1696 struct fc_els_logo *logo;
1698 lockdep_assert_held(&lport->lp_mutex);
1700 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1701 fc_lport_state(lport));
1703 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1704 fc_vports_linkchange(lport);
1706 fp = fc_frame_alloc(lport, sizeof(*logo));
1708 fc_lport_error(lport, fp);
1712 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1713 fc_lport_logo_resp, lport,
1714 2 * lport->r_a_tov))
1715 fc_lport_error(lport, NULL);
1719 * fc_lport_flogi_resp() - Handle response to FLOGI request
1720 * @sp: The sequence that the FLOGI was on
1721 * @fp: The FLOGI response frame
1722 * @lp_arg: The lport port that received the FLOGI response
1724 * Locking Note: This function will be called without the lport lock
1725 * held, but it will lock, call an _enter_* function or fc_lport_error()
1726 * and then unlock the lport.
1728 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1731 struct fc_lport *lport = lp_arg;
1732 struct fc_frame_header *fh;
1733 struct fc_els_flogi *flp;
1736 unsigned int r_a_tov;
1737 unsigned int e_d_tov;
1740 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1742 if (fp == ERR_PTR(-FC_EX_CLOSED))
1745 mutex_lock(&lport->lp_mutex);
1747 if (lport->state != LPORT_ST_FLOGI) {
1748 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1749 "%s\n", fc_lport_state(lport));
1756 fc_lport_error(lport, fp);
1760 fh = fc_frame_header_get(fp);
1761 did = fc_frame_did(fp);
1762 if (fh->fh_r_ctl != FC_RCTL_ELS_REP || did == 0 ||
1763 fc_frame_payload_op(fp) != ELS_LS_ACC) {
1764 FC_LPORT_DBG(lport, "FLOGI not accepted or bad response\n");
1765 fc_lport_error(lport, fp);
1769 flp = fc_frame_payload_get(fp, sizeof(*flp));
1771 FC_LPORT_DBG(lport, "FLOGI bad response\n");
1772 fc_lport_error(lport, fp);
1776 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1779 if (mfs < FC_SP_MIN_MAX_PAYLOAD || mfs > FC_SP_MAX_MAX_PAYLOAD) {
1780 FC_LPORT_DBG(lport, "FLOGI bad mfs:%hu response, "
1781 "lport->mfs:%u\n", mfs, lport->mfs);
1782 fc_lport_error(lport, fp);
1786 if (mfs <= lport->mfs) {
1788 fc_host_maxframe_size(lport->host) = mfs;
1791 csp_flags = ntohs(flp->fl_csp.sp_features);
1792 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1793 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1794 if (csp_flags & FC_SP_FT_EDTR)
1797 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1799 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1800 if (e_d_tov > lport->e_d_tov)
1801 lport->e_d_tov = e_d_tov;
1802 lport->r_a_tov = 2 * lport->e_d_tov;
1803 fc_lport_set_port_id(lport, did, fp);
1804 printk(KERN_INFO "host%d: libfc: "
1805 "Port (%6.6x) entered "
1806 "point-to-point mode\n",
1807 lport->host->host_no, did);
1808 fc_lport_ptp_setup(lport, fc_frame_sid(fp),
1814 if (e_d_tov > lport->e_d_tov)
1815 lport->e_d_tov = e_d_tov;
1816 if (r_a_tov > lport->r_a_tov)
1817 lport->r_a_tov = r_a_tov;
1818 fc_host_fabric_name(lport->host) =
1819 get_unaligned_be64(&flp->fl_wwnn);
1820 fc_lport_set_port_id(lport, did, fp);
1821 fc_lport_enter_dns(lport);
1827 mutex_unlock(&lport->lp_mutex);
1829 EXPORT_SYMBOL(fc_lport_flogi_resp);
1832 * fc_lport_enter_flogi() - Send a FLOGI request to the fabric manager
1833 * @lport: Fibre Channel local port to be logged in to the fabric
1835 static void fc_lport_enter_flogi(struct fc_lport *lport)
1837 struct fc_frame *fp;
1839 lockdep_assert_held(&lport->lp_mutex);
1841 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1842 fc_lport_state(lport));
1844 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1846 if (lport->point_to_multipoint) {
1848 fc_lport_enter_ready(lport);
1852 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1854 return fc_lport_error(lport, fp);
1856 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1857 lport->vport ? ELS_FDISC : ELS_FLOGI,
1858 fc_lport_flogi_resp, lport,
1859 lport->vport ? 2 * lport->r_a_tov :
1861 fc_lport_error(lport, NULL);
1865 * fc_lport_config() - Configure a fc_lport
1866 * @lport: The local port to be configured
1868 int fc_lport_config(struct fc_lport *lport)
1870 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1871 mutex_init(&lport->lp_mutex);
1873 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1875 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1876 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1877 fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
1881 EXPORT_SYMBOL(fc_lport_config);
1884 * fc_lport_init() - Initialize the lport layer for a local port
1885 * @lport: The local port to initialize the exchange layer for
1887 int fc_lport_init(struct fc_lport *lport)
1889 struct fc_host_attrs *fc_host;
1891 fc_host = shost_to_fc_host(lport->host);
1893 /* Set FDMI version to FDMI-2 specification*/
1894 fc_host->fdmi_version = FDMI_V2;
1896 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1897 fc_host_node_name(lport->host) = lport->wwnn;
1898 fc_host_port_name(lport->host) = lport->wwpn;
1899 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1900 memset(fc_host_supported_fc4s(lport->host), 0,
1901 sizeof(fc_host_supported_fc4s(lport->host)));
1902 fc_host_supported_fc4s(lport->host)[2] = 1;
1903 fc_host_supported_fc4s(lport->host)[7] = 1;
1904 fc_host_num_discovered_ports(lport->host) = 4;
1906 /* This value is also unchanging */
1907 memset(fc_host_active_fc4s(lport->host), 0,
1908 sizeof(fc_host_active_fc4s(lport->host)));
1909 fc_host_active_fc4s(lport->host)[2] = 1;
1910 fc_host_active_fc4s(lport->host)[7] = 1;
1911 fc_host_maxframe_size(lport->host) = lport->mfs;
1912 fc_host_supported_speeds(lport->host) = 0;
1913 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1914 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1915 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1916 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1917 if (lport->link_supported_speeds & FC_PORTSPEED_40GBIT)
1918 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_40GBIT;
1919 if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT)
1920 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT;
1921 if (lport->link_supported_speeds & FC_PORTSPEED_25GBIT)
1922 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_25GBIT;
1923 if (lport->link_supported_speeds & FC_PORTSPEED_50GBIT)
1924 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_50GBIT;
1925 if (lport->link_supported_speeds & FC_PORTSPEED_100GBIT)
1926 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_100GBIT;
1928 fc_fc4_add_lport(lport);
1930 fc_host_num_discovered_ports(lport->host) = DISCOVERED_PORTS;
1931 fc_host_port_state(lport->host) = FC_PORTSTATE_ONLINE;
1932 fc_host_max_ct_payload(lport->host) = MAX_CT_PAYLOAD;
1933 fc_host_num_ports(lport->host) = NUMBER_OF_PORTS;
1934 fc_host_bootbios_state(lport->host) = 0X00000000;
1935 snprintf(fc_host_bootbios_version(lport->host),
1936 FC_SYMBOLIC_NAME_SIZE, "%s", "Unknown");
1940 EXPORT_SYMBOL(fc_lport_init);
1943 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1944 * @sp: The sequence for the FC Passthrough response
1945 * @fp: The response frame
1946 * @info_arg: The BSG info that the response is for
1948 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1951 struct fc_bsg_info *info = info_arg;
1952 struct bsg_job *job = info->job;
1953 struct fc_bsg_reply *bsg_reply = job->reply;
1954 struct fc_lport *lport = info->lport;
1955 struct fc_frame_header *fh;
1960 bsg_reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1961 -ECONNABORTED : -ETIMEDOUT;
1962 job->reply_len = sizeof(uint32_t);
1963 bsg_job_done(job, bsg_reply->result,
1964 bsg_reply->reply_payload_rcv_len);
1969 mutex_lock(&lport->lp_mutex);
1970 fh = fc_frame_header_get(fp);
1971 len = fr_len(fp) - sizeof(*fh);
1972 buf = fc_frame_payload_get(fp, 0);
1974 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1975 /* Get the response code from the first frame payload */
1976 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1977 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1978 (unsigned short)fc_frame_payload_op(fp);
1980 /* Save the reply status of the job */
1981 bsg_reply->reply_data.ctels_reply.status =
1982 (cmd == info->rsp_code) ?
1983 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1986 bsg_reply->reply_payload_rcv_len +=
1987 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1988 &info->offset, NULL);
1990 if (fr_eof(fp) == FC_EOF_T &&
1991 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1992 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1993 if (bsg_reply->reply_payload_rcv_len >
1994 job->reply_payload.payload_len)
1995 bsg_reply->reply_payload_rcv_len =
1996 job->reply_payload.payload_len;
1997 bsg_reply->result = 0;
1998 bsg_job_done(job, bsg_reply->result,
1999 bsg_reply->reply_payload_rcv_len);
2003 mutex_unlock(&lport->lp_mutex);
2007 * fc_lport_els_request() - Send ELS passthrough request
2008 * @job: The BSG Passthrough job
2009 * @lport: The local port sending the request
2010 * @did: The destination port id
2011 * @tov: The timeout period (in ms)
2013 static int fc_lport_els_request(struct bsg_job *job,
2014 struct fc_lport *lport,
2017 struct fc_bsg_info *info;
2018 struct fc_frame *fp;
2019 struct fc_frame_header *fh;
2023 lockdep_assert_held(&lport->lp_mutex);
2025 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
2029 len = job->request_payload.payload_len;
2030 pp = fc_frame_payload_get(fp, len);
2032 sg_copy_to_buffer(job->request_payload.sg_list,
2033 job->request_payload.sg_cnt,
2036 fh = fc_frame_header_get(fp);
2037 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
2038 hton24(fh->fh_d_id, did);
2039 hton24(fh->fh_s_id, lport->port_id);
2040 fh->fh_type = FC_TYPE_ELS;
2041 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
2044 fh->fh_parm_offset = 0;
2046 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
2053 info->lport = lport;
2054 info->rsp_code = ELS_LS_ACC;
2055 info->nents = job->reply_payload.sg_cnt;
2056 info->sg = job->reply_payload.sg_list;
2058 if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
2067 * fc_lport_ct_request() - Send CT Passthrough request
2068 * @job: The BSG Passthrough job
2069 * @lport: The local port sending the request
2070 * @did: The destination FC-ID
2071 * @tov: The timeout period to wait for the response
2073 static int fc_lport_ct_request(struct bsg_job *job,
2074 struct fc_lport *lport, u32 did, u32 tov)
2076 struct fc_bsg_info *info;
2077 struct fc_frame *fp;
2078 struct fc_frame_header *fh;
2079 struct fc_ct_req *ct;
2082 lockdep_assert_held(&lport->lp_mutex);
2084 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
2085 job->request_payload.payload_len);
2089 len = job->request_payload.payload_len;
2090 ct = fc_frame_payload_get(fp, len);
2092 sg_copy_to_buffer(job->request_payload.sg_list,
2093 job->request_payload.sg_cnt,
2096 fh = fc_frame_header_get(fp);
2097 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
2098 hton24(fh->fh_d_id, did);
2099 hton24(fh->fh_s_id, lport->port_id);
2100 fh->fh_type = FC_TYPE_CT;
2101 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
2104 fh->fh_parm_offset = 0;
2106 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
2113 info->lport = lport;
2114 info->rsp_code = FC_FS_ACC;
2115 info->nents = job->reply_payload.sg_cnt;
2116 info->sg = job->reply_payload.sg_list;
2118 if (!fc_exch_seq_send(lport, fp, fc_lport_bsg_resp,
2127 * fc_lport_bsg_request() - The common entry point for sending
2128 * FC Passthrough requests
2129 * @job: The BSG passthrough job
2131 int fc_lport_bsg_request(struct bsg_job *job)
2133 struct fc_bsg_request *bsg_request = job->request;
2134 struct fc_bsg_reply *bsg_reply = job->reply;
2135 struct Scsi_Host *shost = fc_bsg_to_shost(job);
2136 struct fc_lport *lport = shost_priv(shost);
2137 struct fc_rport *rport;
2138 struct fc_rport_priv *rdata;
2142 bsg_reply->reply_payload_rcv_len = 0;
2144 mutex_lock(&lport->lp_mutex);
2146 switch (bsg_request->msgcode) {
2147 case FC_BSG_RPT_ELS:
2148 rport = fc_bsg_to_rport(job);
2152 rdata = rport->dd_data;
2153 rc = fc_lport_els_request(job, lport, rport->port_id,
2158 rport = fc_bsg_to_rport(job);
2162 rdata = rport->dd_data;
2163 rc = fc_lport_ct_request(job, lport, rport->port_id,
2168 did = ntoh24(bsg_request->rqst_data.h_ct.port_id);
2169 if (did == FC_FID_DIR_SERV) {
2170 rdata = lport->dns_rdata;
2173 tov = rdata->e_d_tov;
2175 rdata = fc_rport_lookup(lport, did);
2178 tov = rdata->e_d_tov;
2179 kref_put(&rdata->kref, fc_rport_destroy);
2182 rc = fc_lport_ct_request(job, lport, did, tov);
2185 case FC_BSG_HST_ELS_NOLOGIN:
2186 did = ntoh24(bsg_request->rqst_data.h_els.port_id);
2187 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
2191 mutex_unlock(&lport->lp_mutex);
2194 EXPORT_SYMBOL(fc_lport_bsg_request);