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/slab.h>
92 #include <asm/unaligned.h>
94 #include <scsi/fc/fc_gs.h>
96 #include <scsi/libfc.h>
97 #include <scsi/fc_encode.h>
98 #include <linux/scatterlist.h>
100 #include "fc_libfc.h"
102 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
103 #define FC_LOCAL_PTP_FID_LO 0x010101
104 #define FC_LOCAL_PTP_FID_HI 0x010102
106 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
108 static void fc_lport_error(struct fc_lport *, struct fc_frame *);
110 static void fc_lport_enter_reset(struct fc_lport *);
111 static void fc_lport_enter_flogi(struct fc_lport *);
112 static void fc_lport_enter_dns(struct fc_lport *);
113 static void fc_lport_enter_ns(struct fc_lport *, enum fc_lport_state);
114 static void fc_lport_enter_scr(struct fc_lport *);
115 static void fc_lport_enter_ready(struct fc_lport *);
116 static void fc_lport_enter_logo(struct fc_lport *);
118 static const char *fc_lport_state_names[] = {
119 [LPORT_ST_DISABLED] = "disabled",
120 [LPORT_ST_FLOGI] = "FLOGI",
121 [LPORT_ST_DNS] = "dNS",
122 [LPORT_ST_RNN_ID] = "RNN_ID",
123 [LPORT_ST_RSNN_NN] = "RSNN_NN",
124 [LPORT_ST_RSPN_ID] = "RSPN_ID",
125 [LPORT_ST_RFT_ID] = "RFT_ID",
126 [LPORT_ST_RFF_ID] = "RFF_ID",
127 [LPORT_ST_SCR] = "SCR",
128 [LPORT_ST_READY] = "Ready",
129 [LPORT_ST_LOGO] = "LOGO",
130 [LPORT_ST_RESET] = "reset",
134 * struct fc_bsg_info - FC Passthrough managemet structure
135 * @job: The passthrough job
136 * @lport: The local port to pass through a command
137 * @rsp_code: The expected response code
138 * @sg: job->reply_payload.sg_list
139 * @nents: job->reply_payload.sg_cnt
140 * @offset: The offset into the response data
143 struct fc_bsg_job *job;
144 struct fc_lport *lport;
146 struct scatterlist *sg;
152 * fc_frame_drop() - Dummy frame handler
153 * @lport: The local port the frame was received on
154 * @fp: The received frame
156 static int fc_frame_drop(struct fc_lport *lport, struct fc_frame *fp)
163 * fc_lport_rport_callback() - Event handler for rport events
164 * @lport: The lport which is receiving the event
165 * @rdata: private remote port data
166 * @event: The event that 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);
185 FC_LPORT_DBG(lport, "Received an READY event "
186 "on port (%6.6x) for the directory "
187 "server, but the lport is not "
188 "in the DNS state, it's in the "
189 "%d state", rdata->ids.port_id,
191 lport->tt.rport_logoff(rdata);
195 case RPORT_EV_FAILED:
197 lport->dns_rdata = NULL;
202 mutex_unlock(&lport->lp_mutex);
206 * fc_lport_state() - Return a string which represents the lport's state
207 * @lport: The lport whose state is to converted to a string
209 static const char *fc_lport_state(struct fc_lport *lport)
213 cp = fc_lport_state_names[lport->state];
220 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
221 * @lport: The lport to attach the ptp rport to
222 * @remote_fid: The FID of the ptp rport
223 * @remote_wwpn: The WWPN of the ptp rport
224 * @remote_wwnn: The WWNN of the ptp rport
226 static void fc_lport_ptp_setup(struct fc_lport *lport,
227 u32 remote_fid, u64 remote_wwpn,
230 mutex_lock(&lport->disc.disc_mutex);
231 if (lport->ptp_rdata) {
232 lport->tt.rport_logoff(lport->ptp_rdata);
233 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
235 lport->ptp_rdata = lport->tt.rport_create(lport, remote_fid);
236 kref_get(&lport->ptp_rdata->kref);
237 lport->ptp_rdata->ids.port_name = remote_wwpn;
238 lport->ptp_rdata->ids.node_name = remote_wwnn;
239 mutex_unlock(&lport->disc.disc_mutex);
241 lport->tt.rport_login(lport->ptp_rdata);
243 fc_lport_enter_ready(lport);
247 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
248 * @shost: The SCSI host whose port state is to be determined
250 void fc_get_host_port_state(struct Scsi_Host *shost)
252 struct fc_lport *lport = shost_priv(shost);
254 mutex_lock(&lport->lp_mutex);
256 fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
258 switch (lport->state) {
260 fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
263 fc_host_port_state(shost) = FC_PORTSTATE_OFFLINE;
265 mutex_unlock(&lport->lp_mutex);
267 EXPORT_SYMBOL(fc_get_host_port_state);
270 * fc_get_host_speed() - Return the speed of the given Scsi_Host
271 * @shost: The SCSI host whose port speed is to be determined
273 void fc_get_host_speed(struct Scsi_Host *shost)
275 struct fc_lport *lport = shost_priv(shost);
277 fc_host_speed(shost) = lport->link_speed;
279 EXPORT_SYMBOL(fc_get_host_speed);
282 * fc_get_host_stats() - Return the Scsi_Host's statistics
283 * @shost: The SCSI host whose statistics are to be returned
285 struct fc_host_statistics *fc_get_host_stats(struct Scsi_Host *shost)
287 struct fc_host_statistics *fcoe_stats;
288 struct fc_lport *lport = shost_priv(shost);
289 struct timespec v0, v1;
291 u64 fcp_in_bytes = 0;
292 u64 fcp_out_bytes = 0;
294 fcoe_stats = &lport->host_stats;
295 memset(fcoe_stats, 0, sizeof(struct fc_host_statistics));
297 jiffies_to_timespec(jiffies, &v0);
298 jiffies_to_timespec(lport->boot_time, &v1);
299 fcoe_stats->seconds_since_last_reset = (v0.tv_sec - v1.tv_sec);
301 for_each_possible_cpu(cpu) {
302 struct fcoe_dev_stats *stats;
304 stats = per_cpu_ptr(lport->dev_stats, cpu);
306 fcoe_stats->tx_frames += stats->TxFrames;
307 fcoe_stats->tx_words += stats->TxWords;
308 fcoe_stats->rx_frames += stats->RxFrames;
309 fcoe_stats->rx_words += stats->RxWords;
310 fcoe_stats->error_frames += stats->ErrorFrames;
311 fcoe_stats->invalid_crc_count += stats->InvalidCRCCount;
312 fcoe_stats->fcp_input_requests += stats->InputRequests;
313 fcoe_stats->fcp_output_requests += stats->OutputRequests;
314 fcoe_stats->fcp_control_requests += stats->ControlRequests;
315 fcp_in_bytes += stats->InputBytes;
316 fcp_out_bytes += stats->OutputBytes;
317 fcoe_stats->link_failure_count += stats->LinkFailureCount;
319 fcoe_stats->fcp_input_megabytes = div_u64(fcp_in_bytes, 1000000);
320 fcoe_stats->fcp_output_megabytes = div_u64(fcp_out_bytes, 1000000);
321 fcoe_stats->lip_count = -1;
322 fcoe_stats->nos_count = -1;
323 fcoe_stats->loss_of_sync_count = -1;
324 fcoe_stats->loss_of_signal_count = -1;
325 fcoe_stats->prim_seq_protocol_err_count = -1;
326 fcoe_stats->dumped_frames = -1;
329 EXPORT_SYMBOL(fc_get_host_stats);
332 * fc_lport_flogi_fill() - Fill in FLOGI command for request
333 * @lport: The local port the FLOGI is for
334 * @flogi: The FLOGI command
337 static void fc_lport_flogi_fill(struct fc_lport *lport,
338 struct fc_els_flogi *flogi,
341 struct fc_els_csp *sp;
342 struct fc_els_cssp *cp;
344 memset(flogi, 0, sizeof(*flogi));
345 flogi->fl_cmd = (u8) op;
346 put_unaligned_be64(lport->wwpn, &flogi->fl_wwpn);
347 put_unaligned_be64(lport->wwnn, &flogi->fl_wwnn);
349 sp->sp_hi_ver = 0x20;
350 sp->sp_lo_ver = 0x20;
351 sp->sp_bb_cred = htons(10); /* this gets set by gateway */
352 sp->sp_bb_data = htons((u16) lport->mfs);
353 cp = &flogi->fl_cssp[3 - 1]; /* class 3 parameters */
354 cp->cp_class = htons(FC_CPC_VALID | FC_CPC_SEQ);
355 if (op != ELS_FLOGI) {
356 sp->sp_features = htons(FC_SP_FT_CIRO);
357 sp->sp_tot_seq = htons(255); /* seq. we accept */
358 sp->sp_rel_off = htons(0x1f);
359 sp->sp_e_d_tov = htonl(lport->e_d_tov);
361 cp->cp_rdfs = htons((u16) lport->mfs);
362 cp->cp_con_seq = htons(255);
368 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
369 * @lport: The local port to add a new FC-4 type to
370 * @type: The new FC-4 type
372 static void fc_lport_add_fc4_type(struct fc_lport *lport, enum fc_fh_type type)
376 mp = &lport->fcts.ff_type_map[type / FC_NS_BPW];
377 *mp = htonl(ntohl(*mp) | 1UL << (type % FC_NS_BPW));
381 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
382 * @lport: Fibre Channel local port receiving the RLIR
383 * @fp: The RLIR request frame
385 * Locking Note: The lport lock is expected to be held before calling
388 static void fc_lport_recv_rlir_req(struct fc_lport *lport, struct fc_frame *fp)
390 FC_LPORT_DBG(lport, "Received RLIR request while in state %s\n",
391 fc_lport_state(lport));
393 lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
398 * fc_lport_recv_echo_req() - Handle received ECHO request
399 * @lport: The local port receiving the ECHO
400 * @fp: ECHO request frame
402 * Locking Note: The lport lock is expected to be held before calling
405 static void fc_lport_recv_echo_req(struct fc_lport *lport,
406 struct fc_frame *in_fp)
413 FC_LPORT_DBG(lport, "Received ECHO request while in state %s\n",
414 fc_lport_state(lport));
416 len = fr_len(in_fp) - sizeof(struct fc_frame_header);
417 pp = fc_frame_payload_get(in_fp, len);
419 if (len < sizeof(__be32))
420 len = sizeof(__be32);
422 fp = fc_frame_alloc(lport, len);
424 dp = fc_frame_payload_get(fp, len);
426 *((__be32 *)dp) = htonl(ELS_LS_ACC << 24);
427 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
428 lport->tt.frame_send(lport, fp);
430 fc_frame_free(in_fp);
434 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
435 * @lport: The local port receiving the RNID
436 * @fp: The RNID request frame
438 * Locking Note: The lport lock is expected to be held before calling
441 static void fc_lport_recv_rnid_req(struct fc_lport *lport,
442 struct fc_frame *in_fp)
445 struct fc_els_rnid *req;
447 struct fc_els_rnid_resp rnid;
448 struct fc_els_rnid_cid cid;
449 struct fc_els_rnid_gen gen;
451 struct fc_seq_els_data rjt_data;
455 FC_LPORT_DBG(lport, "Received RNID request while in state %s\n",
456 fc_lport_state(lport));
458 req = fc_frame_payload_get(in_fp, sizeof(*req));
460 rjt_data.reason = ELS_RJT_LOGIC;
461 rjt_data.explan = ELS_EXPL_NONE;
462 lport->tt.seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
466 if (fmt != ELS_RNIDF_GEN ||
467 ntohl(lport->rnid_gen.rnid_atype) == 0) {
468 fmt = ELS_RNIDF_NONE; /* nothing to provide */
469 len -= sizeof(rp->gen);
471 fp = fc_frame_alloc(lport, len);
473 rp = fc_frame_payload_get(fp, len);
475 rp->rnid.rnid_cmd = ELS_LS_ACC;
476 rp->rnid.rnid_fmt = fmt;
477 rp->rnid.rnid_cid_len = sizeof(rp->cid);
478 rp->cid.rnid_wwpn = htonll(lport->wwpn);
479 rp->cid.rnid_wwnn = htonll(lport->wwnn);
480 if (fmt == ELS_RNIDF_GEN) {
481 rp->rnid.rnid_sid_len = sizeof(rp->gen);
482 memcpy(&rp->gen, &lport->rnid_gen,
485 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
486 lport->tt.frame_send(lport, fp);
489 fc_frame_free(in_fp);
493 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
494 * @lport: The local port receiving the LOGO
495 * @fp: The LOGO request frame
497 * Locking Note: The lport lock is exected to be held before calling
500 static void fc_lport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
502 lport->tt.seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
503 fc_lport_enter_reset(lport);
508 * fc_fabric_login() - Start the lport state machine
509 * @lport: The local port that should log into the fabric
511 * Locking Note: This function should not be called
512 * with the lport lock held.
514 int fc_fabric_login(struct fc_lport *lport)
518 mutex_lock(&lport->lp_mutex);
519 if (lport->state == LPORT_ST_DISABLED ||
520 lport->state == LPORT_ST_LOGO) {
521 fc_lport_state_enter(lport, LPORT_ST_RESET);
522 fc_lport_enter_reset(lport);
525 mutex_unlock(&lport->lp_mutex);
529 EXPORT_SYMBOL(fc_fabric_login);
532 * __fc_linkup() - Handler for transport linkup events
533 * @lport: The lport whose link is up
535 * Locking: must be called with the lp_mutex held
537 void __fc_linkup(struct fc_lport *lport)
539 if (!lport->link_up) {
542 if (lport->state == LPORT_ST_RESET)
543 fc_lport_enter_flogi(lport);
548 * fc_linkup() - Handler for transport linkup events
549 * @lport: The local port whose link is up
551 void fc_linkup(struct fc_lport *lport)
553 printk(KERN_INFO "host%d: libfc: Link up on port (%6.6x)\n",
554 lport->host->host_no, lport->port_id);
556 mutex_lock(&lport->lp_mutex);
558 mutex_unlock(&lport->lp_mutex);
560 EXPORT_SYMBOL(fc_linkup);
563 * __fc_linkdown() - Handler for transport linkdown events
564 * @lport: The lport whose link is down
566 * Locking: must be called with the lp_mutex held
568 void __fc_linkdown(struct fc_lport *lport)
570 if (lport->link_up) {
572 fc_lport_enter_reset(lport);
573 lport->tt.fcp_cleanup(lport);
578 * fc_linkdown() - Handler for transport linkdown events
579 * @lport: The local port whose link is down
581 void fc_linkdown(struct fc_lport *lport)
583 printk(KERN_INFO "host%d: libfc: Link down on port (%6.6x)\n",
584 lport->host->host_no, lport->port_id);
586 mutex_lock(&lport->lp_mutex);
587 __fc_linkdown(lport);
588 mutex_unlock(&lport->lp_mutex);
590 EXPORT_SYMBOL(fc_linkdown);
593 * fc_fabric_logoff() - Logout of the fabric
594 * @lport: The local port to logoff the fabric
597 * 0 for success, -1 for failure
599 int fc_fabric_logoff(struct fc_lport *lport)
601 lport->tt.disc_stop_final(lport);
602 mutex_lock(&lport->lp_mutex);
603 if (lport->dns_rdata)
604 lport->tt.rport_logoff(lport->dns_rdata);
605 mutex_unlock(&lport->lp_mutex);
606 lport->tt.rport_flush_queue();
607 mutex_lock(&lport->lp_mutex);
608 fc_lport_enter_logo(lport);
609 mutex_unlock(&lport->lp_mutex);
610 cancel_delayed_work_sync(&lport->retry_work);
613 EXPORT_SYMBOL(fc_fabric_logoff);
616 * fc_lport_destroy() - Unregister a fc_lport
617 * @lport: The local port to unregister
620 * exit routine for fc_lport instance
621 * clean-up all the allocated memory
622 * and free up other system resources.
625 int fc_lport_destroy(struct fc_lport *lport)
627 mutex_lock(&lport->lp_mutex);
628 lport->state = LPORT_ST_DISABLED;
630 lport->tt.frame_send = fc_frame_drop;
631 mutex_unlock(&lport->lp_mutex);
633 lport->tt.fcp_abort_io(lport);
634 lport->tt.disc_stop_final(lport);
635 lport->tt.exch_mgr_reset(lport, 0, 0);
636 fc_fc4_del_lport(lport);
639 EXPORT_SYMBOL(fc_lport_destroy);
642 * fc_set_mfs() - Set the maximum frame size for a local port
643 * @lport: The local port to set the MFS for
646 int fc_set_mfs(struct fc_lport *lport, u32 mfs)
648 unsigned int old_mfs;
651 mutex_lock(&lport->lp_mutex);
653 old_mfs = lport->mfs;
655 if (mfs >= FC_MIN_MAX_FRAME) {
657 if (mfs > FC_MAX_FRAME)
659 mfs -= sizeof(struct fc_frame_header);
664 if (!rc && mfs < old_mfs)
665 fc_lport_enter_reset(lport);
667 mutex_unlock(&lport->lp_mutex);
671 EXPORT_SYMBOL(fc_set_mfs);
674 * fc_lport_disc_callback() - Callback for discovery events
675 * @lport: The local port receiving the event
676 * @event: The discovery event
678 void fc_lport_disc_callback(struct fc_lport *lport, enum fc_disc_event event)
681 case DISC_EV_SUCCESS:
682 FC_LPORT_DBG(lport, "Discovery succeeded\n");
685 printk(KERN_ERR "host%d: libfc: "
686 "Discovery failed for port (%6.6x)\n",
687 lport->host->host_no, lport->port_id);
688 mutex_lock(&lport->lp_mutex);
689 fc_lport_enter_reset(lport);
690 mutex_unlock(&lport->lp_mutex);
699 * fc_rport_enter_ready() - Enter the ready state and start discovery
700 * @lport: The local port that is ready
702 * Locking Note: The lport lock is expected to be held before calling
705 static void fc_lport_enter_ready(struct fc_lport *lport)
707 FC_LPORT_DBG(lport, "Entered READY from state %s\n",
708 fc_lport_state(lport));
710 fc_lport_state_enter(lport, LPORT_ST_READY);
712 fc_vport_set_state(lport->vport, FC_VPORT_ACTIVE);
713 fc_vports_linkchange(lport);
715 if (!lport->ptp_rdata)
716 lport->tt.disc_start(fc_lport_disc_callback, lport);
720 * fc_lport_set_port_id() - set the local port Port ID
721 * @lport: The local port which will have its Port ID set.
722 * @port_id: The new port ID.
723 * @fp: The frame containing the incoming request, or NULL.
725 * Locking Note: The lport lock is expected to be held before calling
728 static void fc_lport_set_port_id(struct fc_lport *lport, u32 port_id,
732 printk(KERN_INFO "host%d: Assigned Port ID %6.6x\n",
733 lport->host->host_no, port_id);
735 lport->port_id = port_id;
737 /* Update the fc_host */
738 fc_host_port_id(lport->host) = port_id;
740 if (lport->tt.lport_set_port_id)
741 lport->tt.lport_set_port_id(lport, port_id, fp);
745 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
746 * @lport: The local port which will have its Port ID set.
747 * @port_id: The new port ID.
749 * Called by the lower-level driver when transport sets the local port_id.
750 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
751 * discovery to be skipped.
753 void fc_lport_set_local_id(struct fc_lport *lport, u32 port_id)
755 mutex_lock(&lport->lp_mutex);
757 fc_lport_set_port_id(lport, port_id, NULL);
759 switch (lport->state) {
763 fc_lport_enter_ready(lport);
768 mutex_unlock(&lport->lp_mutex);
770 EXPORT_SYMBOL(fc_lport_set_local_id);
773 * fc_lport_recv_flogi_req() - Receive a FLOGI request
774 * @lport: The local port that received the request
775 * @rx_fp: The FLOGI frame
777 * A received FLOGI request indicates a point-to-point connection.
778 * Accept it with the common service parameters indicating our N port.
779 * Set up to do a PLOGI if we have the higher-number WWPN.
781 * Locking Note: The lport lock is expected to be held before calling
784 static void fc_lport_recv_flogi_req(struct fc_lport *lport,
785 struct fc_frame *rx_fp)
788 struct fc_frame_header *fh;
789 struct fc_els_flogi *flp;
790 struct fc_els_flogi *new_flp;
795 FC_LPORT_DBG(lport, "Received FLOGI request while in state %s\n",
796 fc_lport_state(lport));
798 remote_fid = fc_frame_sid(rx_fp);
799 flp = fc_frame_payload_get(rx_fp, sizeof(*flp));
802 remote_wwpn = get_unaligned_be64(&flp->fl_wwpn);
803 if (remote_wwpn == lport->wwpn) {
804 printk(KERN_WARNING "host%d: libfc: Received FLOGI from port "
805 "with same WWPN %16.16llx\n",
806 lport->host->host_no, remote_wwpn);
809 FC_LPORT_DBG(lport, "FLOGI from port WWPN %16.16llx\n", remote_wwpn);
812 * XXX what is the right thing to do for FIDs?
813 * The originator might expect our S_ID to be 0xfffffe.
814 * But if so, both of us could end up with the same FID.
816 local_fid = FC_LOCAL_PTP_FID_LO;
817 if (remote_wwpn < lport->wwpn) {
818 local_fid = FC_LOCAL_PTP_FID_HI;
819 if (!remote_fid || remote_fid == local_fid)
820 remote_fid = FC_LOCAL_PTP_FID_LO;
821 } else if (!remote_fid) {
822 remote_fid = FC_LOCAL_PTP_FID_HI;
825 fc_lport_set_port_id(lport, local_fid, rx_fp);
827 fp = fc_frame_alloc(lport, sizeof(*flp));
829 new_flp = fc_frame_payload_get(fp, sizeof(*flp));
830 fc_lport_flogi_fill(lport, new_flp, ELS_FLOGI);
831 new_flp->fl_cmd = (u8) ELS_LS_ACC;
834 * Send the response. If this fails, the originator should
835 * repeat the sequence.
837 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
838 fh = fc_frame_header_get(fp);
839 hton24(fh->fh_s_id, local_fid);
840 hton24(fh->fh_d_id, remote_fid);
841 lport->tt.frame_send(lport, fp);
844 fc_lport_error(lport, fp);
846 fc_lport_ptp_setup(lport, remote_fid, remote_wwpn,
847 get_unaligned_be64(&flp->fl_wwnn));
849 fc_frame_free(rx_fp);
853 * fc_lport_recv_els_req() - The generic lport ELS request handler
854 * @lport: The local port that received the request
855 * @fp: The request frame
857 * This function will see if the lport handles the request or
858 * if an rport should handle the request.
860 * Locking Note: This function should not be called with the lport
861 * lock held because it will grab the lock.
863 static void fc_lport_recv_els_req(struct fc_lport *lport,
866 void (*recv)(struct fc_lport *, struct fc_frame *);
868 mutex_lock(&lport->lp_mutex);
871 * Handle special ELS cases like FLOGI, LOGO, and
872 * RSCN here. These don't require a session.
873 * Even if we had a session, it might not be ready.
881 recv = lport->tt.rport_recv_req;
882 switch (fc_frame_payload_op(fp)) {
884 if (!lport->point_to_multipoint)
885 recv = fc_lport_recv_flogi_req;
888 if (fc_frame_sid(fp) == FC_FID_FLOGI)
889 recv = fc_lport_recv_logo_req;
892 recv = lport->tt.disc_recv_req;
895 recv = fc_lport_recv_echo_req;
898 recv = fc_lport_recv_rlir_req;
901 recv = fc_lport_recv_rnid_req;
907 mutex_unlock(&lport->lp_mutex);
910 static int fc_lport_els_prli(struct fc_rport_priv *rdata, u32 spp_len,
911 const struct fc_els_spp *spp_in,
912 struct fc_els_spp *spp_out)
914 return FC_SPP_RESP_INVL;
917 struct fc4_prov fc_lport_els_prov = {
918 .prli = fc_lport_els_prli,
919 .recv = fc_lport_recv_els_req,
923 * fc_lport_recv_req() - The generic lport request handler
924 * @lport: The lport that received the request
925 * @fp: The frame the request is in
927 * Locking Note: This function should not be called with the lport
928 * lock held because it may grab the lock.
930 static void fc_lport_recv_req(struct fc_lport *lport,
933 struct fc_frame_header *fh = fc_frame_header_get(fp);
934 struct fc_seq *sp = fr_seq(fp);
935 struct fc4_prov *prov;
938 * Use RCU read lock and module_lock to be sure module doesn't
939 * deregister and get unloaded while we're calling it.
940 * try_module_get() is inlined and accepts a NULL parameter.
941 * Only ELSes and FCP target ops should come through here.
942 * The locking is unfortunate, and a better scheme is being sought.
946 if (fh->fh_type >= FC_FC4_PROV_SIZE)
948 prov = rcu_dereference(fc_passive_prov[fh->fh_type]);
949 if (!prov || !try_module_get(prov->module))
952 prov->recv(lport, fp);
953 module_put(prov->module);
957 FC_LPORT_DBG(lport, "dropping unexpected frame type %x\n", fh->fh_type);
959 lport->tt.exch_done(sp);
963 * fc_lport_reset() - Reset a local port
964 * @lport: The local port which should be reset
966 * Locking Note: This functions should not be called with the
969 int fc_lport_reset(struct fc_lport *lport)
971 cancel_delayed_work_sync(&lport->retry_work);
972 mutex_lock(&lport->lp_mutex);
973 fc_lport_enter_reset(lport);
974 mutex_unlock(&lport->lp_mutex);
977 EXPORT_SYMBOL(fc_lport_reset);
980 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
981 * @lport: The local port to be reset
983 * Locking Note: The lport lock is expected to be held before calling
986 static void fc_lport_reset_locked(struct fc_lport *lport)
988 if (lport->dns_rdata)
989 lport->tt.rport_logoff(lport->dns_rdata);
991 if (lport->ptp_rdata) {
992 lport->tt.rport_logoff(lport->ptp_rdata);
993 kref_put(&lport->ptp_rdata->kref, lport->tt.rport_destroy);
994 lport->ptp_rdata = NULL;
997 lport->tt.disc_stop(lport);
999 lport->tt.exch_mgr_reset(lport, 0, 0);
1000 fc_host_fabric_name(lport->host) = 0;
1002 if (lport->port_id && (!lport->point_to_multipoint || !lport->link_up))
1003 fc_lport_set_port_id(lport, 0, NULL);
1007 * fc_lport_enter_reset() - Reset the local port
1008 * @lport: The local port to be reset
1010 * Locking Note: The lport lock is expected to be held before calling
1013 static void fc_lport_enter_reset(struct fc_lport *lport)
1015 FC_LPORT_DBG(lport, "Entered RESET state from %s state\n",
1016 fc_lport_state(lport));
1018 if (lport->state == LPORT_ST_DISABLED || lport->state == LPORT_ST_LOGO)
1023 fc_vport_set_state(lport->vport, FC_VPORT_INITIALIZING);
1025 fc_vport_set_state(lport->vport, FC_VPORT_LINKDOWN);
1027 fc_lport_state_enter(lport, LPORT_ST_RESET);
1028 fc_vports_linkchange(lport);
1029 fc_lport_reset_locked(lport);
1031 fc_lport_enter_flogi(lport);
1035 * fc_lport_enter_disabled() - Disable the local port
1036 * @lport: The local port to be reset
1038 * Locking Note: The lport lock is expected to be held before calling
1041 static void fc_lport_enter_disabled(struct fc_lport *lport)
1043 FC_LPORT_DBG(lport, "Entered disabled state from %s state\n",
1044 fc_lport_state(lport));
1046 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1047 fc_vports_linkchange(lport);
1048 fc_lport_reset_locked(lport);
1052 * fc_lport_error() - Handler for any errors
1053 * @lport: The local port that the error was on
1054 * @fp: The error code encoded in a frame pointer
1056 * If the error was caused by a resource allocation failure
1057 * then wait for half a second and retry, otherwise retry
1058 * after the e_d_tov time.
1060 static void fc_lport_error(struct fc_lport *lport, struct fc_frame *fp)
1062 unsigned long delay = 0;
1063 FC_LPORT_DBG(lport, "Error %ld in state %s, retries %d\n",
1064 PTR_ERR(fp), fc_lport_state(lport),
1065 lport->retry_count);
1067 if (PTR_ERR(fp) == -FC_EX_CLOSED)
1071 * Memory allocation failure, or the exchange timed out
1072 * or we received LS_RJT.
1075 if (lport->retry_count < lport->max_retry_count) {
1076 lport->retry_count++;
1078 delay = msecs_to_jiffies(500);
1080 delay = msecs_to_jiffies(lport->e_d_tov);
1082 schedule_delayed_work(&lport->retry_work, delay);
1084 fc_lport_enter_reset(lport);
1088 * fc_lport_ns_resp() - Handle response to a name server
1089 * registration exchange
1090 * @sp: current sequence in exchange
1091 * @fp: response frame
1092 * @lp_arg: Fibre Channel host port instance
1094 * Locking Note: This function will be called without the lport lock
1095 * held, but it will lock, call an _enter_* function or fc_lport_error()
1096 * and then unlock the lport.
1098 static void fc_lport_ns_resp(struct fc_seq *sp, struct fc_frame *fp,
1101 struct fc_lport *lport = lp_arg;
1102 struct fc_frame_header *fh;
1103 struct fc_ct_hdr *ct;
1105 FC_LPORT_DBG(lport, "Received a ns %s\n", fc_els_resp_type(fp));
1107 if (fp == ERR_PTR(-FC_EX_CLOSED))
1110 mutex_lock(&lport->lp_mutex);
1112 if (lport->state < LPORT_ST_RNN_ID || lport->state > LPORT_ST_RFF_ID) {
1113 FC_LPORT_DBG(lport, "Received a name server response, "
1114 "but in state %s\n", fc_lport_state(lport));
1121 fc_lport_error(lport, fp);
1125 fh = fc_frame_header_get(fp);
1126 ct = fc_frame_payload_get(fp, sizeof(*ct));
1128 if (fh && ct && fh->fh_type == FC_TYPE_CT &&
1129 ct->ct_fs_type == FC_FST_DIR &&
1130 ct->ct_fs_subtype == FC_NS_SUBTYPE &&
1131 ntohs(ct->ct_cmd) == FC_FS_ACC)
1132 switch (lport->state) {
1133 case LPORT_ST_RNN_ID:
1134 fc_lport_enter_ns(lport, LPORT_ST_RSNN_NN);
1136 case LPORT_ST_RSNN_NN:
1137 fc_lport_enter_ns(lport, LPORT_ST_RSPN_ID);
1139 case LPORT_ST_RSPN_ID:
1140 fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1142 case LPORT_ST_RFT_ID:
1143 fc_lport_enter_ns(lport, LPORT_ST_RFF_ID);
1145 case LPORT_ST_RFF_ID:
1146 fc_lport_enter_scr(lport);
1149 /* should have already been caught by state checks */
1153 fc_lport_error(lport, fp);
1157 mutex_unlock(&lport->lp_mutex);
1161 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1162 * @sp: current sequence in SCR exchange
1163 * @fp: response frame
1164 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1166 * Locking Note: This function will be called without the lport lock
1167 * held, but it will lock, call an _enter_* function or fc_lport_error
1168 * and then unlock the lport.
1170 static void fc_lport_scr_resp(struct fc_seq *sp, struct fc_frame *fp,
1173 struct fc_lport *lport = lp_arg;
1176 FC_LPORT_DBG(lport, "Received a SCR %s\n", fc_els_resp_type(fp));
1178 if (fp == ERR_PTR(-FC_EX_CLOSED))
1181 mutex_lock(&lport->lp_mutex);
1183 if (lport->state != LPORT_ST_SCR) {
1184 FC_LPORT_DBG(lport, "Received a SCR response, but in state "
1185 "%s\n", fc_lport_state(lport));
1192 fc_lport_error(lport, fp);
1196 op = fc_frame_payload_op(fp);
1197 if (op == ELS_LS_ACC)
1198 fc_lport_enter_ready(lport);
1200 fc_lport_error(lport, fp);
1205 mutex_unlock(&lport->lp_mutex);
1209 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1210 * @lport: The local port to register for state changes
1212 * Locking Note: The lport lock is expected to be held before calling
1215 static void fc_lport_enter_scr(struct fc_lport *lport)
1217 struct fc_frame *fp;
1219 FC_LPORT_DBG(lport, "Entered SCR state from %s state\n",
1220 fc_lport_state(lport));
1222 fc_lport_state_enter(lport, LPORT_ST_SCR);
1224 fp = fc_frame_alloc(lport, sizeof(struct fc_els_scr));
1226 fc_lport_error(lport, fp);
1230 if (!lport->tt.elsct_send(lport, FC_FID_FCTRL, fp, ELS_SCR,
1231 fc_lport_scr_resp, lport,
1232 2 * lport->r_a_tov))
1233 fc_lport_error(lport, NULL);
1237 * fc_lport_enter_ns() - register some object with the name server
1238 * @lport: Fibre Channel local port to register
1240 * Locking Note: The lport lock is expected to be held before calling
1243 static void fc_lport_enter_ns(struct fc_lport *lport, enum fc_lport_state state)
1245 struct fc_frame *fp;
1247 int size = sizeof(struct fc_ct_hdr);
1250 FC_LPORT_DBG(lport, "Entered %s state from %s state\n",
1251 fc_lport_state_names[state],
1252 fc_lport_state(lport));
1254 fc_lport_state_enter(lport, state);
1257 case LPORT_ST_RNN_ID:
1259 size += sizeof(struct fc_ns_rn_id);
1261 case LPORT_ST_RSNN_NN:
1262 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1263 /* if there is no symbolic name, skip to RFT_ID */
1265 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1266 cmd = FC_NS_RSNN_NN;
1267 size += sizeof(struct fc_ns_rsnn) + len;
1269 case LPORT_ST_RSPN_ID:
1270 len = strnlen(fc_host_symbolic_name(lport->host), 255);
1271 /* if there is no symbolic name, skip to RFT_ID */
1273 return fc_lport_enter_ns(lport, LPORT_ST_RFT_ID);
1274 cmd = FC_NS_RSPN_ID;
1275 size += sizeof(struct fc_ns_rspn) + len;
1277 case LPORT_ST_RFT_ID:
1279 size += sizeof(struct fc_ns_rft);
1281 case LPORT_ST_RFF_ID:
1283 size += sizeof(struct fc_ns_rff_id);
1286 fc_lport_error(lport, NULL);
1290 fp = fc_frame_alloc(lport, size);
1292 fc_lport_error(lport, fp);
1296 if (!lport->tt.elsct_send(lport, FC_FID_DIR_SERV, fp, cmd,
1298 lport, 3 * lport->r_a_tov))
1299 fc_lport_error(lport, fp);
1302 static struct fc_rport_operations fc_lport_rport_ops = {
1303 .event_callback = fc_lport_rport_callback,
1307 * fc_rport_enter_dns() - Create a fc_rport for the name server
1308 * @lport: The local port requesting a remote port for the name server
1310 * Locking Note: The lport lock is expected to be held before calling
1313 static void fc_lport_enter_dns(struct fc_lport *lport)
1315 struct fc_rport_priv *rdata;
1317 FC_LPORT_DBG(lport, "Entered DNS state from %s state\n",
1318 fc_lport_state(lport));
1320 fc_lport_state_enter(lport, LPORT_ST_DNS);
1322 mutex_lock(&lport->disc.disc_mutex);
1323 rdata = lport->tt.rport_create(lport, FC_FID_DIR_SERV);
1324 mutex_unlock(&lport->disc.disc_mutex);
1328 rdata->ops = &fc_lport_rport_ops;
1329 lport->tt.rport_login(rdata);
1333 fc_lport_error(lport, NULL);
1337 * fc_lport_timeout() - Handler for the retry_work timer
1338 * @work: The work struct of the local port
1340 static void fc_lport_timeout(struct work_struct *work)
1342 struct fc_lport *lport =
1343 container_of(work, struct fc_lport,
1346 mutex_lock(&lport->lp_mutex);
1348 switch (lport->state) {
1349 case LPORT_ST_DISABLED:
1352 case LPORT_ST_READY:
1355 case LPORT_ST_RESET:
1357 case LPORT_ST_FLOGI:
1358 fc_lport_enter_flogi(lport);
1361 fc_lport_enter_dns(lport);
1363 case LPORT_ST_RNN_ID:
1364 case LPORT_ST_RSNN_NN:
1365 case LPORT_ST_RSPN_ID:
1366 case LPORT_ST_RFT_ID:
1367 case LPORT_ST_RFF_ID:
1368 fc_lport_enter_ns(lport, lport->state);
1371 fc_lport_enter_scr(lport);
1374 fc_lport_enter_logo(lport);
1378 mutex_unlock(&lport->lp_mutex);
1382 * fc_lport_logo_resp() - Handle response to LOGO request
1383 * @sp: The sequence that the LOGO was on
1384 * @fp: The LOGO frame
1385 * @lp_arg: The lport port that received the LOGO request
1387 * Locking Note: This function will be called without the lport lock
1388 * held, but it will lock, call an _enter_* function or fc_lport_error()
1389 * and then unlock the lport.
1391 void fc_lport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1394 struct fc_lport *lport = lp_arg;
1397 FC_LPORT_DBG(lport, "Received a LOGO %s\n", fc_els_resp_type(fp));
1399 if (fp == ERR_PTR(-FC_EX_CLOSED))
1402 mutex_lock(&lport->lp_mutex);
1404 if (lport->state != LPORT_ST_LOGO) {
1405 FC_LPORT_DBG(lport, "Received a LOGO response, but in state "
1406 "%s\n", fc_lport_state(lport));
1413 fc_lport_error(lport, fp);
1417 op = fc_frame_payload_op(fp);
1418 if (op == ELS_LS_ACC)
1419 fc_lport_enter_disabled(lport);
1421 fc_lport_error(lport, fp);
1426 mutex_unlock(&lport->lp_mutex);
1428 EXPORT_SYMBOL(fc_lport_logo_resp);
1431 * fc_rport_enter_logo() - Logout of the fabric
1432 * @lport: The local port to be logged out
1434 * Locking Note: The lport lock is expected to be held before calling
1437 static void fc_lport_enter_logo(struct fc_lport *lport)
1439 struct fc_frame *fp;
1440 struct fc_els_logo *logo;
1442 FC_LPORT_DBG(lport, "Entered LOGO state from %s state\n",
1443 fc_lport_state(lport));
1445 fc_lport_state_enter(lport, LPORT_ST_LOGO);
1446 fc_vports_linkchange(lport);
1448 fp = fc_frame_alloc(lport, sizeof(*logo));
1450 fc_lport_error(lport, fp);
1454 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp, ELS_LOGO,
1455 fc_lport_logo_resp, lport,
1456 2 * lport->r_a_tov))
1457 fc_lport_error(lport, NULL);
1461 * fc_lport_flogi_resp() - Handle response to FLOGI request
1462 * @sp: The sequence that the FLOGI was on
1463 * @fp: The FLOGI response frame
1464 * @lp_arg: The lport port that received the FLOGI response
1466 * Locking Note: This function will be called without the lport lock
1467 * held, but it will lock, call an _enter_* function or fc_lport_error()
1468 * and then unlock the lport.
1470 void fc_lport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
1473 struct fc_lport *lport = lp_arg;
1474 struct fc_els_flogi *flp;
1477 unsigned int r_a_tov;
1478 unsigned int e_d_tov;
1481 FC_LPORT_DBG(lport, "Received a FLOGI %s\n", fc_els_resp_type(fp));
1483 if (fp == ERR_PTR(-FC_EX_CLOSED))
1486 mutex_lock(&lport->lp_mutex);
1488 if (lport->state != LPORT_ST_FLOGI) {
1489 FC_LPORT_DBG(lport, "Received a FLOGI response, but in state "
1490 "%s\n", fc_lport_state(lport));
1497 fc_lport_error(lport, fp);
1501 did = fc_frame_did(fp);
1502 if (fc_frame_payload_op(fp) == ELS_LS_ACC && did) {
1503 flp = fc_frame_payload_get(fp, sizeof(*flp));
1505 mfs = ntohs(flp->fl_csp.sp_bb_data) &
1507 if (mfs >= FC_SP_MIN_MAX_PAYLOAD &&
1510 csp_flags = ntohs(flp->fl_csp.sp_features);
1511 r_a_tov = ntohl(flp->fl_csp.sp_r_a_tov);
1512 e_d_tov = ntohl(flp->fl_csp.sp_e_d_tov);
1513 if (csp_flags & FC_SP_FT_EDTR)
1516 lport->npiv_enabled = !!(csp_flags & FC_SP_FT_NPIV_ACC);
1518 if ((csp_flags & FC_SP_FT_FPORT) == 0) {
1519 if (e_d_tov > lport->e_d_tov)
1520 lport->e_d_tov = e_d_tov;
1521 lport->r_a_tov = 2 * e_d_tov;
1522 fc_lport_set_port_id(lport, did, fp);
1523 printk(KERN_INFO "host%d: libfc: "
1524 "Port (%6.6x) entered "
1525 "point-to-point mode\n",
1526 lport->host->host_no, did);
1527 fc_lport_ptp_setup(lport, fc_frame_sid(fp),
1533 lport->e_d_tov = e_d_tov;
1534 lport->r_a_tov = r_a_tov;
1535 fc_host_fabric_name(lport->host) =
1536 get_unaligned_be64(&flp->fl_wwnn);
1537 fc_lport_set_port_id(lport, did, fp);
1538 fc_lport_enter_dns(lport);
1542 FC_LPORT_DBG(lport, "FLOGI RJT or bad response\n");
1543 fc_lport_error(lport, fp);
1549 mutex_unlock(&lport->lp_mutex);
1551 EXPORT_SYMBOL(fc_lport_flogi_resp);
1554 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1555 * @lport: Fibre Channel local port to be logged in to the fabric
1557 * Locking Note: The lport lock is expected to be held before calling
1560 void fc_lport_enter_flogi(struct fc_lport *lport)
1562 struct fc_frame *fp;
1564 FC_LPORT_DBG(lport, "Entered FLOGI state from %s state\n",
1565 fc_lport_state(lport));
1567 fc_lport_state_enter(lport, LPORT_ST_FLOGI);
1569 if (lport->point_to_multipoint) {
1571 fc_lport_enter_ready(lport);
1575 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1577 return fc_lport_error(lport, fp);
1579 if (!lport->tt.elsct_send(lport, FC_FID_FLOGI, fp,
1580 lport->vport ? ELS_FDISC : ELS_FLOGI,
1581 fc_lport_flogi_resp, lport,
1582 lport->vport ? 2 * lport->r_a_tov :
1584 fc_lport_error(lport, NULL);
1588 * fc_lport_config() - Configure a fc_lport
1589 * @lport: The local port to be configured
1591 int fc_lport_config(struct fc_lport *lport)
1593 INIT_LIST_HEAD(&lport->ema_list);
1594 INIT_DELAYED_WORK(&lport->retry_work, fc_lport_timeout);
1595 mutex_init(&lport->lp_mutex);
1597 fc_lport_state_enter(lport, LPORT_ST_DISABLED);
1599 fc_lport_add_fc4_type(lport, FC_TYPE_FCP);
1600 fc_lport_add_fc4_type(lport, FC_TYPE_CT);
1601 fc_fc4_conf_lport_params(lport, FC_TYPE_FCP);
1605 EXPORT_SYMBOL(fc_lport_config);
1608 * fc_lport_init() - Initialize the lport layer for a local port
1609 * @lport: The local port to initialize the exchange layer for
1611 int fc_lport_init(struct fc_lport *lport)
1613 if (!lport->tt.lport_recv)
1614 lport->tt.lport_recv = fc_lport_recv_req;
1616 if (!lport->tt.lport_reset)
1617 lport->tt.lport_reset = fc_lport_reset;
1619 fc_host_port_type(lport->host) = FC_PORTTYPE_NPORT;
1620 fc_host_node_name(lport->host) = lport->wwnn;
1621 fc_host_port_name(lport->host) = lport->wwpn;
1622 fc_host_supported_classes(lport->host) = FC_COS_CLASS3;
1623 memset(fc_host_supported_fc4s(lport->host), 0,
1624 sizeof(fc_host_supported_fc4s(lport->host)));
1625 fc_host_supported_fc4s(lport->host)[2] = 1;
1626 fc_host_supported_fc4s(lport->host)[7] = 1;
1628 /* This value is also unchanging */
1629 memset(fc_host_active_fc4s(lport->host), 0,
1630 sizeof(fc_host_active_fc4s(lport->host)));
1631 fc_host_active_fc4s(lport->host)[2] = 1;
1632 fc_host_active_fc4s(lport->host)[7] = 1;
1633 fc_host_maxframe_size(lport->host) = lport->mfs;
1634 fc_host_supported_speeds(lport->host) = 0;
1635 if (lport->link_supported_speeds & FC_PORTSPEED_1GBIT)
1636 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_1GBIT;
1637 if (lport->link_supported_speeds & FC_PORTSPEED_10GBIT)
1638 fc_host_supported_speeds(lport->host) |= FC_PORTSPEED_10GBIT;
1639 fc_fc4_add_lport(lport);
1643 EXPORT_SYMBOL(fc_lport_init);
1646 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1647 * @sp: The sequence for the FC Passthrough response
1648 * @fp: The response frame
1649 * @info_arg: The BSG info that the response is for
1651 static void fc_lport_bsg_resp(struct fc_seq *sp, struct fc_frame *fp,
1654 struct fc_bsg_info *info = info_arg;
1655 struct fc_bsg_job *job = info->job;
1656 struct fc_lport *lport = info->lport;
1657 struct fc_frame_header *fh;
1662 job->reply->result = (PTR_ERR(fp) == -FC_EX_CLOSED) ?
1663 -ECONNABORTED : -ETIMEDOUT;
1664 job->reply_len = sizeof(uint32_t);
1665 job->state_flags |= FC_RQST_STATE_DONE;
1671 mutex_lock(&lport->lp_mutex);
1672 fh = fc_frame_header_get(fp);
1673 len = fr_len(fp) - sizeof(*fh);
1674 buf = fc_frame_payload_get(fp, 0);
1676 if (fr_sof(fp) == FC_SOF_I3 && !ntohs(fh->fh_seq_cnt)) {
1677 /* Get the response code from the first frame payload */
1678 unsigned short cmd = (info->rsp_code == FC_FS_ACC) ?
1679 ntohs(((struct fc_ct_hdr *)buf)->ct_cmd) :
1680 (unsigned short)fc_frame_payload_op(fp);
1682 /* Save the reply status of the job */
1683 job->reply->reply_data.ctels_reply.status =
1684 (cmd == info->rsp_code) ?
1685 FC_CTELS_STATUS_OK : FC_CTELS_STATUS_REJECT;
1688 job->reply->reply_payload_rcv_len +=
1689 fc_copy_buffer_to_sglist(buf, len, info->sg, &info->nents,
1690 &info->offset, KM_BIO_SRC_IRQ, NULL);
1692 if (fr_eof(fp) == FC_EOF_T &&
1693 (ntoh24(fh->fh_f_ctl) & (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) ==
1694 (FC_FC_LAST_SEQ | FC_FC_END_SEQ)) {
1695 if (job->reply->reply_payload_rcv_len >
1696 job->reply_payload.payload_len)
1697 job->reply->reply_payload_rcv_len =
1698 job->reply_payload.payload_len;
1699 job->reply->result = 0;
1700 job->state_flags |= FC_RQST_STATE_DONE;
1705 mutex_unlock(&lport->lp_mutex);
1709 * fc_lport_els_request() - Send ELS passthrough request
1710 * @job: The BSG Passthrough job
1711 * @lport: The local port sending the request
1712 * @did: The destination port id
1714 * Locking Note: The lport lock is expected to be held before calling
1717 static int fc_lport_els_request(struct fc_bsg_job *job,
1718 struct fc_lport *lport,
1721 struct fc_bsg_info *info;
1722 struct fc_frame *fp;
1723 struct fc_frame_header *fh;
1727 fp = fc_frame_alloc(lport, job->request_payload.payload_len);
1731 len = job->request_payload.payload_len;
1732 pp = fc_frame_payload_get(fp, len);
1734 sg_copy_to_buffer(job->request_payload.sg_list,
1735 job->request_payload.sg_cnt,
1738 fh = fc_frame_header_get(fp);
1739 fh->fh_r_ctl = FC_RCTL_ELS_REQ;
1740 hton24(fh->fh_d_id, did);
1741 hton24(fh->fh_s_id, lport->port_id);
1742 fh->fh_type = FC_TYPE_ELS;
1743 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1746 fh->fh_parm_offset = 0;
1748 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1755 info->lport = lport;
1756 info->rsp_code = ELS_LS_ACC;
1757 info->nents = job->reply_payload.sg_cnt;
1758 info->sg = job->reply_payload.sg_list;
1760 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1769 * fc_lport_ct_request() - Send CT Passthrough request
1770 * @job: The BSG Passthrough job
1771 * @lport: The local port sending the request
1772 * @did: The destination FC-ID
1773 * @tov: The timeout period to wait for the response
1775 * Locking Note: The lport lock is expected to be held before calling
1778 static int fc_lport_ct_request(struct fc_bsg_job *job,
1779 struct fc_lport *lport, u32 did, u32 tov)
1781 struct fc_bsg_info *info;
1782 struct fc_frame *fp;
1783 struct fc_frame_header *fh;
1784 struct fc_ct_req *ct;
1787 fp = fc_frame_alloc(lport, sizeof(struct fc_ct_hdr) +
1788 job->request_payload.payload_len);
1792 len = job->request_payload.payload_len;
1793 ct = fc_frame_payload_get(fp, len);
1795 sg_copy_to_buffer(job->request_payload.sg_list,
1796 job->request_payload.sg_cnt,
1799 fh = fc_frame_header_get(fp);
1800 fh->fh_r_ctl = FC_RCTL_DD_UNSOL_CTL;
1801 hton24(fh->fh_d_id, did);
1802 hton24(fh->fh_s_id, lport->port_id);
1803 fh->fh_type = FC_TYPE_CT;
1804 hton24(fh->fh_f_ctl, FC_FCTL_REQ);
1807 fh->fh_parm_offset = 0;
1809 info = kzalloc(sizeof(struct fc_bsg_info), GFP_KERNEL);
1816 info->lport = lport;
1817 info->rsp_code = FC_FS_ACC;
1818 info->nents = job->reply_payload.sg_cnt;
1819 info->sg = job->reply_payload.sg_list;
1821 if (!lport->tt.exch_seq_send(lport, fp, fc_lport_bsg_resp,
1830 * fc_lport_bsg_request() - The common entry point for sending
1831 * FC Passthrough requests
1832 * @job: The BSG passthrough job
1834 int fc_lport_bsg_request(struct fc_bsg_job *job)
1836 struct request *rsp = job->req->next_rq;
1837 struct Scsi_Host *shost = job->shost;
1838 struct fc_lport *lport = shost_priv(shost);
1839 struct fc_rport *rport;
1840 struct fc_rport_priv *rdata;
1844 job->reply->reply_payload_rcv_len = 0;
1846 rsp->resid_len = job->reply_payload.payload_len;
1848 mutex_lock(&lport->lp_mutex);
1850 switch (job->request->msgcode) {
1851 case FC_BSG_RPT_ELS:
1856 rdata = rport->dd_data;
1857 rc = fc_lport_els_request(job, lport, rport->port_id,
1866 rdata = rport->dd_data;
1867 rc = fc_lport_ct_request(job, lport, rport->port_id,
1872 did = ntoh24(job->request->rqst_data.h_ct.port_id);
1873 if (did == FC_FID_DIR_SERV)
1874 rdata = lport->dns_rdata;
1876 rdata = lport->tt.rport_lookup(lport, did);
1881 rc = fc_lport_ct_request(job, lport, did, rdata->e_d_tov);
1884 case FC_BSG_HST_ELS_NOLOGIN:
1885 did = ntoh24(job->request->rqst_data.h_els.port_id);
1886 rc = fc_lport_els_request(job, lport, did, lport->e_d_tov);
1890 mutex_unlock(&lport->lp_mutex);
1893 EXPORT_SYMBOL(fc_lport_bsg_request);