2 * Copyright(c) 2007 - 2008 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 * This file contains all processing regarding fc_rports. It contains the
24 * rport state machine and does all rport interaction with the transport class.
25 * There should be no other places in libfc that interact directly with the
26 * transport class in regards to adding and deleting rports.
28 * fc_rport's represent N_Port's within the fabric.
34 * The rport should never hold the rport mutex and then attempt to acquire
35 * either the lport or disc mutexes. The rport's mutex is considered lesser
36 * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for
37 * more comments on the hierarchy.
39 * The locking strategy is similar to the lport's strategy. The lock protects
40 * the rport's states and is held and released by the entry points to the rport
41 * block. All _enter_* functions correspond to rport states and expect the rport
42 * mutex to be locked before calling them. This means that rports only handle
43 * one request or response at a time, since they're not critical for the I/O
44 * path this potential over-use of the mutex is acceptable.
48 * RPORT REFERENCE COUNTING
50 * A rport reference should be taken when:
51 * - an rport is allocated
52 * - a workqueue item is scheduled
53 * - an ELS request is send
54 * The reference should be dropped when:
55 * - the workqueue function has finished
56 * - the ELS response is handled
57 * - an rport is removed
60 #include <linux/kernel.h>
61 #include <linux/spinlock.h>
62 #include <linux/interrupt.h>
63 #include <linux/slab.h>
64 #include <linux/rcupdate.h>
65 #include <linux/timer.h>
66 #include <linux/workqueue.h>
67 #include <linux/export.h>
68 #include <linux/rculist.h>
70 #include <asm/unaligned.h>
72 #include <scsi/libfc.h>
73 #include <scsi/fc_encode.h>
77 static struct workqueue_struct *rport_event_queue;
79 static void fc_rport_enter_flogi(struct fc_rport_priv *);
80 static void fc_rport_enter_plogi(struct fc_rport_priv *);
81 static void fc_rport_enter_prli(struct fc_rport_priv *);
82 static void fc_rport_enter_rtv(struct fc_rport_priv *);
83 static void fc_rport_enter_ready(struct fc_rport_priv *);
84 static void fc_rport_enter_logo(struct fc_rport_priv *);
85 static void fc_rport_enter_adisc(struct fc_rport_priv *);
87 static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *);
88 static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *);
89 static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *);
90 static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *);
91 static void fc_rport_timeout(struct work_struct *);
92 static void fc_rport_error(struct fc_rport_priv *, int);
93 static void fc_rport_error_retry(struct fc_rport_priv *, int);
94 static void fc_rport_work(struct work_struct *);
96 static const char *fc_rport_state_names[] = {
97 [RPORT_ST_INIT] = "Init",
98 [RPORT_ST_FLOGI] = "FLOGI",
99 [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT",
100 [RPORT_ST_PLOGI] = "PLOGI",
101 [RPORT_ST_PRLI] = "PRLI",
102 [RPORT_ST_RTV] = "RTV",
103 [RPORT_ST_READY] = "Ready",
104 [RPORT_ST_ADISC] = "ADISC",
105 [RPORT_ST_DELETE] = "Delete",
109 * fc_rport_lookup() - Lookup a remote port by port_id
110 * @lport: The local port to lookup the remote port on
111 * @port_id: The remote port ID to look up
113 * The reference count of the fc_rport_priv structure is
116 struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
119 struct fc_rport_priv *rdata = NULL, *tmp_rdata;
122 list_for_each_entry_rcu(tmp_rdata, &lport->disc.rports, peers)
123 if (tmp_rdata->ids.port_id == port_id &&
124 kref_get_unless_zero(&tmp_rdata->kref)) {
131 EXPORT_SYMBOL(fc_rport_lookup);
134 * fc_rport_create() - Create a new remote port
135 * @lport: The local port this remote port will be associated with
136 * @ids: The identifiers for the new remote port
138 * The remote port will start in the INIT state.
140 * Locking note: must be called with the disc_mutex held.
142 struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, u32 port_id)
144 struct fc_rport_priv *rdata;
146 rdata = fc_rport_lookup(lport, port_id);
150 rdata = kzalloc(sizeof(*rdata) + lport->rport_priv_size, GFP_KERNEL);
154 rdata->ids.node_name = -1;
155 rdata->ids.port_name = -1;
156 rdata->ids.port_id = port_id;
157 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
159 kref_init(&rdata->kref);
160 mutex_init(&rdata->rp_mutex);
161 rdata->local_port = lport;
162 rdata->rp_state = RPORT_ST_INIT;
163 rdata->event = RPORT_EV_NONE;
164 rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
165 rdata->e_d_tov = lport->e_d_tov;
166 rdata->r_a_tov = lport->r_a_tov;
167 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
168 INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
169 INIT_WORK(&rdata->event_work, fc_rport_work);
170 if (port_id != FC_FID_DIR_SERV) {
171 rdata->lld_event_callback = lport->tt.rport_event_callback;
172 list_add_rcu(&rdata->peers, &lport->disc.rports);
176 EXPORT_SYMBOL(fc_rport_create);
179 * fc_rport_destroy() - Free a remote port after last reference is released
180 * @kref: The remote port's kref
182 void fc_rport_destroy(struct kref *kref)
184 struct fc_rport_priv *rdata;
186 rdata = container_of(kref, struct fc_rport_priv, kref);
187 kfree_rcu(rdata, rcu);
189 EXPORT_SYMBOL(fc_rport_destroy);
192 * fc_rport_state() - Return a string identifying the remote port's state
193 * @rdata: The remote port
195 static const char *fc_rport_state(struct fc_rport_priv *rdata)
199 cp = fc_rport_state_names[rdata->rp_state];
206 * fc_set_rport_loss_tmo() - Set the remote port loss timeout
207 * @rport: The remote port that gets a new timeout value
208 * @timeout: The new timeout value (in seconds)
210 void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
213 rport->dev_loss_tmo = timeout;
215 rport->dev_loss_tmo = 1;
217 EXPORT_SYMBOL(fc_set_rport_loss_tmo);
220 * fc_plogi_get_maxframe() - Get the maximum payload from the common service
221 * parameters in a FLOGI frame
222 * @flp: The FLOGI or PLOGI payload
223 * @maxval: The maximum frame size upper limit; this may be less than what
224 * is in the service parameters
226 static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
232 * Get max payload from the common service parameters and the
233 * class 3 receive data field size.
235 mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK;
236 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
238 mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs);
239 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
245 * fc_rport_state_enter() - Change the state of a remote port
246 * @rdata: The remote port whose state should change
247 * @new: The new state
249 * Locking Note: Called with the rport lock held
251 static void fc_rport_state_enter(struct fc_rport_priv *rdata,
252 enum fc_rport_state new)
254 if (rdata->rp_state != new)
256 rdata->rp_state = new;
260 * fc_rport_work() - Handler for remote port events in the rport_event_queue
261 * @work: Handle to the remote port being dequeued
263 * Reference counting: drops kref on return
265 static void fc_rport_work(struct work_struct *work)
268 struct fc_rport_priv *rdata =
269 container_of(work, struct fc_rport_priv, event_work);
270 struct fc_rport_libfc_priv *rpriv;
271 enum fc_rport_event event;
272 struct fc_lport *lport = rdata->local_port;
273 struct fc_rport_operations *rport_ops;
274 struct fc_rport_identifiers ids;
275 struct fc_rport *rport;
276 struct fc4_prov *prov;
279 mutex_lock(&rdata->rp_mutex);
280 event = rdata->event;
281 rport_ops = rdata->ops;
282 rport = rdata->rport;
284 FC_RPORT_DBG(rdata, "work event %u\n", event);
289 rdata->event = RPORT_EV_NONE;
290 rdata->major_retries = 0;
291 kref_get(&rdata->kref);
292 mutex_unlock(&rdata->rp_mutex);
295 FC_RPORT_DBG(rdata, "No rport!\n");
296 rport = fc_remote_port_add(lport->host, 0, &ids);
299 FC_RPORT_DBG(rdata, "Failed to add the rport\n");
300 fc_rport_logoff(rdata);
301 kref_put(&rdata->kref, fc_rport_destroy);
304 mutex_lock(&rdata->rp_mutex);
306 FC_RPORT_DBG(rdata, "rport already allocated\n");
307 rdata->rport = rport;
308 rport->maxframe_size = rdata->maxframe_size;
309 rport->supported_classes = rdata->supported_classes;
311 rpriv = rport->dd_data;
312 rpriv->local_port = lport;
313 rpriv->rp_state = rdata->rp_state;
314 rpriv->flags = rdata->flags;
315 rpriv->e_d_tov = rdata->e_d_tov;
316 rpriv->r_a_tov = rdata->r_a_tov;
317 mutex_unlock(&rdata->rp_mutex);
319 if (rport_ops && rport_ops->event_callback) {
320 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
321 rport_ops->event_callback(lport, rdata, event);
323 if (rdata->lld_event_callback) {
324 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
325 rdata->lld_event_callback(lport, rdata, event);
327 kref_put(&rdata->kref, fc_rport_destroy);
330 case RPORT_EV_FAILED:
333 if (rdata->prli_count) {
334 mutex_lock(&fc_prov_mutex);
335 for (type = 1; type < FC_FC4_PROV_SIZE; type++) {
336 prov = fc_passive_prov[type];
337 if (prov && prov->prlo)
340 mutex_unlock(&fc_prov_mutex);
342 port_id = rdata->ids.port_id;
343 mutex_unlock(&rdata->rp_mutex);
345 if (rport_ops && rport_ops->event_callback) {
346 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
347 rport_ops->event_callback(lport, rdata, event);
349 if (rdata->lld_event_callback) {
350 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
351 rdata->lld_event_callback(lport, rdata, event);
353 if (cancel_delayed_work_sync(&rdata->retry_work))
354 kref_put(&rdata->kref, fc_rport_destroy);
357 * Reset any outstanding exchanges before freeing rport.
359 lport->tt.exch_mgr_reset(lport, 0, port_id);
360 lport->tt.exch_mgr_reset(lport, port_id, 0);
363 rpriv = rport->dd_data;
364 rpriv->rp_state = RPORT_ST_DELETE;
365 mutex_lock(&rdata->rp_mutex);
367 mutex_unlock(&rdata->rp_mutex);
368 fc_remote_port_delete(rport);
371 mutex_lock(&rdata->rp_mutex);
372 if (rdata->rp_state == RPORT_ST_DELETE) {
373 if (port_id == FC_FID_DIR_SERV) {
374 rdata->event = RPORT_EV_NONE;
375 mutex_unlock(&rdata->rp_mutex);
376 kref_put(&rdata->kref, fc_rport_destroy);
377 } else if ((rdata->flags & FC_RP_STARTED) &&
378 rdata->major_retries <
379 lport->max_rport_retry_count) {
380 rdata->major_retries++;
381 rdata->event = RPORT_EV_NONE;
382 FC_RPORT_DBG(rdata, "work restart\n");
383 fc_rport_enter_flogi(rdata);
384 mutex_unlock(&rdata->rp_mutex);
386 mutex_unlock(&rdata->rp_mutex);
387 FC_RPORT_DBG(rdata, "work delete\n");
388 mutex_lock(&lport->disc.disc_mutex);
389 list_del_rcu(&rdata->peers);
390 mutex_unlock(&lport->disc.disc_mutex);
391 kref_put(&rdata->kref, fc_rport_destroy);
395 * Re-open for events. Reissue READY event if ready.
397 rdata->event = RPORT_EV_NONE;
398 if (rdata->rp_state == RPORT_ST_READY) {
399 FC_RPORT_DBG(rdata, "work reopen\n");
400 fc_rport_enter_ready(rdata);
402 mutex_unlock(&rdata->rp_mutex);
407 mutex_unlock(&rdata->rp_mutex);
410 kref_put(&rdata->kref, fc_rport_destroy);
414 * fc_rport_login() - Start the remote port login state machine
415 * @rdata: The remote port to be logged in to
417 * Initiates the RP state machine. It is called from the LP module.
418 * This function will issue the following commands to the N_Port
419 * identified by the FC ID provided.
425 * Locking Note: Called without the rport lock held. This
426 * function will hold the rport lock, call an _enter_*
427 * function and then unlock the rport.
429 * This indicates the intent to be logged into the remote port.
430 * If it appears we are already logged in, ADISC is used to verify
433 int fc_rport_login(struct fc_rport_priv *rdata)
435 mutex_lock(&rdata->rp_mutex);
437 if (rdata->flags & FC_RP_STARTED) {
438 FC_RPORT_DBG(rdata, "port already started\n");
439 mutex_unlock(&rdata->rp_mutex);
443 rdata->flags |= FC_RP_STARTED;
444 switch (rdata->rp_state) {
446 FC_RPORT_DBG(rdata, "ADISC port\n");
447 fc_rport_enter_adisc(rdata);
449 case RPORT_ST_DELETE:
450 FC_RPORT_DBG(rdata, "Restart deleted port\n");
453 FC_RPORT_DBG(rdata, "Login to port\n");
454 fc_rport_enter_flogi(rdata);
457 FC_RPORT_DBG(rdata, "Login in progress, state %s\n",
458 fc_rport_state(rdata));
461 mutex_unlock(&rdata->rp_mutex);
465 EXPORT_SYMBOL(fc_rport_login);
468 * fc_rport_enter_delete() - Schedule a remote port to be deleted
469 * @rdata: The remote port to be deleted
470 * @event: The event to report as the reason for deletion
472 * Locking Note: Called with the rport lock held.
474 * Allow state change into DELETE only once.
476 * Call queue_work only if there's no event already pending.
477 * Set the new event so that the old pending event will not occur.
478 * Since we have the mutex, even if fc_rport_work() is already started,
479 * it'll see the new event.
481 * Reference counting: does not modify kref
483 static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
484 enum fc_rport_event event)
486 if (rdata->rp_state == RPORT_ST_DELETE)
489 FC_RPORT_DBG(rdata, "Delete port\n");
491 fc_rport_state_enter(rdata, RPORT_ST_DELETE);
493 kref_get(&rdata->kref);
494 if (rdata->event == RPORT_EV_NONE &&
495 !queue_work(rport_event_queue, &rdata->event_work))
496 kref_put(&rdata->kref, fc_rport_destroy);
498 rdata->event = event;
502 * fc_rport_logoff() - Logoff and remove a remote port
503 * @rdata: The remote port to be logged off of
505 * Locking Note: Called without the rport lock held. This
506 * function will hold the rport lock, call an _enter_*
507 * function and then unlock the rport.
509 int fc_rport_logoff(struct fc_rport_priv *rdata)
511 struct fc_lport *lport = rdata->local_port;
512 u32 port_id = rdata->ids.port_id;
514 mutex_lock(&rdata->rp_mutex);
516 FC_RPORT_DBG(rdata, "Remove port\n");
518 rdata->flags &= ~FC_RP_STARTED;
519 if (rdata->rp_state == RPORT_ST_DELETE) {
520 FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n");
525 * To explicitly Logout, the initiating Nx_Port shall terminate
526 * other open Sequences that it initiated with the destination
527 * Nx_Port prior to performing Logout.
529 lport->tt.exch_mgr_reset(lport, 0, port_id);
530 lport->tt.exch_mgr_reset(lport, port_id, 0);
532 fc_rport_enter_logo(rdata);
535 * Change the state to Delete so that we discard
538 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
540 mutex_unlock(&rdata->rp_mutex);
543 EXPORT_SYMBOL(fc_rport_logoff);
546 * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state
547 * @rdata: The remote port that is ready
549 * Locking Note: The rport lock is expected to be held before calling
552 * Reference counting: schedules workqueue, does not modify kref
554 static void fc_rport_enter_ready(struct fc_rport_priv *rdata)
556 fc_rport_state_enter(rdata, RPORT_ST_READY);
558 FC_RPORT_DBG(rdata, "Port is Ready\n");
560 kref_get(&rdata->kref);
561 if (rdata->event == RPORT_EV_NONE &&
562 !queue_work(rport_event_queue, &rdata->event_work))
563 kref_put(&rdata->kref, fc_rport_destroy);
565 rdata->event = RPORT_EV_READY;
569 * fc_rport_timeout() - Handler for the retry_work timer
570 * @work: Handle to the remote port that has timed out
572 * Locking Note: Called without the rport lock held. This
573 * function will hold the rport lock, call an _enter_*
574 * function and then unlock the rport.
576 * Reference counting: Drops kref on return.
578 static void fc_rport_timeout(struct work_struct *work)
580 struct fc_rport_priv *rdata =
581 container_of(work, struct fc_rport_priv, retry_work.work);
583 mutex_lock(&rdata->rp_mutex);
584 FC_RPORT_DBG(rdata, "Port timeout, state %s\n", fc_rport_state(rdata));
586 switch (rdata->rp_state) {
588 fc_rport_enter_flogi(rdata);
591 fc_rport_enter_plogi(rdata);
594 fc_rport_enter_prli(rdata);
597 fc_rport_enter_rtv(rdata);
600 fc_rport_enter_adisc(rdata);
602 case RPORT_ST_PLOGI_WAIT:
605 case RPORT_ST_DELETE:
609 mutex_unlock(&rdata->rp_mutex);
610 kref_put(&rdata->kref, fc_rport_destroy);
614 * fc_rport_error() - Error handler, called once retries have been exhausted
615 * @rdata: The remote port the error is happened on
616 * @err: The error code
618 * Locking Note: The rport lock is expected to be held before
619 * calling this routine
621 * Reference counting: does not modify kref
623 static void fc_rport_error(struct fc_rport_priv *rdata, int err)
625 struct fc_lport *lport = rdata->local_port;
627 FC_RPORT_DBG(rdata, "Error %d in state %s, retries %d\n",
628 -err, fc_rport_state(rdata), rdata->retries);
630 switch (rdata->rp_state) {
632 rdata->flags &= ~FC_RP_STARTED;
633 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
636 if (lport->point_to_multipoint) {
637 rdata->flags &= ~FC_RP_STARTED;
638 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
640 fc_rport_enter_logo(rdata);
643 fc_rport_enter_ready(rdata);
647 fc_rport_enter_logo(rdata);
649 case RPORT_ST_PLOGI_WAIT:
650 case RPORT_ST_DELETE:
658 * fc_rport_error_retry() - Handler for remote port state retries
659 * @rdata: The remote port whose state is to be retried
660 * @err: The error code
662 * If the error was an exchange timeout retry immediately,
663 * otherwise wait for E_D_TOV.
665 * Locking Note: The rport lock is expected to be held before
666 * calling this routine
668 * Reference counting: increments kref when scheduling retry_work
670 static void fc_rport_error_retry(struct fc_rport_priv *rdata, int err)
672 unsigned long delay = msecs_to_jiffies(rdata->e_d_tov);
674 /* make sure this isn't an FC_EX_CLOSED error, never retry those */
675 if (err == -FC_EX_CLOSED)
678 if (rdata->retries < rdata->local_port->max_rport_retry_count) {
679 FC_RPORT_DBG(rdata, "Error %d in state %s, retrying\n",
680 err, fc_rport_state(rdata));
682 /* no additional delay on exchange timeouts */
683 if (err == -FC_EX_TIMEOUT)
685 kref_get(&rdata->kref);
686 if (!schedule_delayed_work(&rdata->retry_work, delay))
687 kref_put(&rdata->kref, fc_rport_destroy);
692 fc_rport_error(rdata, err);
696 * fc_rport_login_complete() - Handle parameters and completion of p-mp login.
697 * @rdata: The remote port which we logged into or which logged into us.
698 * @fp: The FLOGI or PLOGI request or response frame
700 * Returns non-zero error if a problem is detected with the frame.
701 * Does not free the frame.
703 * This is only used in point-to-multipoint mode for FIP currently.
705 static int fc_rport_login_complete(struct fc_rport_priv *rdata,
708 struct fc_lport *lport = rdata->local_port;
709 struct fc_els_flogi *flogi;
710 unsigned int e_d_tov;
713 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
717 csp_flags = ntohs(flogi->fl_csp.sp_features);
719 if (fc_frame_payload_op(fp) == ELS_FLOGI) {
720 if (csp_flags & FC_SP_FT_FPORT) {
721 FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n");
727 * E_D_TOV is not valid on an incoming FLOGI request.
729 e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov);
730 if (csp_flags & FC_SP_FT_EDTR)
732 if (e_d_tov > rdata->e_d_tov)
733 rdata->e_d_tov = e_d_tov;
735 rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs);
740 * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode
741 * @sp: The sequence that the FLOGI was on
742 * @fp: The FLOGI response frame
743 * @rp_arg: The remote port that received the FLOGI response
745 static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
748 struct fc_rport_priv *rdata = rp_arg;
749 struct fc_lport *lport = rdata->local_port;
750 struct fc_els_flogi *flogi;
751 unsigned int r_a_tov;
755 FC_RPORT_DBG(rdata, "Received a FLOGI %s\n",
756 IS_ERR(fp) ? "error" : fc_els_resp_type(fp));
758 if (fp == ERR_PTR(-FC_EX_CLOSED))
761 mutex_lock(&rdata->rp_mutex);
763 if (rdata->rp_state != RPORT_ST_FLOGI) {
764 FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state "
765 "%s\n", fc_rport_state(rdata));
772 fc_rport_error(rdata, PTR_ERR(fp));
775 opcode = fc_frame_payload_op(fp);
776 if (opcode == ELS_LS_RJT) {
777 struct fc_els_ls_rjt *rjt;
779 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
780 FC_RPORT_DBG(rdata, "FLOGI ELS rejected, reason %x expl %x\n",
781 rjt->er_reason, rjt->er_explan);
782 err = -FC_EX_ELS_RJT;
784 } else if (opcode != ELS_LS_ACC) {
785 FC_RPORT_DBG(rdata, "FLOGI ELS invalid opcode %x\n", opcode);
786 err = -FC_EX_ELS_RJT;
789 if (fc_rport_login_complete(rdata, fp)) {
790 FC_RPORT_DBG(rdata, "FLOGI failed, no login\n");
791 err = -FC_EX_INV_LOGIN;
795 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
797 err = -FC_EX_ALLOC_ERR;
800 r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov);
801 if (r_a_tov > rdata->r_a_tov)
802 rdata->r_a_tov = r_a_tov;
804 if (rdata->ids.port_name < lport->wwpn)
805 fc_rport_enter_plogi(rdata);
807 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
811 mutex_unlock(&rdata->rp_mutex);
813 kref_put(&rdata->kref, fc_rport_destroy);
816 FC_RPORT_DBG(rdata, "Bad FLOGI response\n");
817 fc_rport_error_retry(rdata, err);
822 * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp
823 * @rdata: The remote port to send a FLOGI to
825 * Locking Note: The rport lock is expected to be held before calling
828 * Reference counting: increments kref when sending ELS
830 static void fc_rport_enter_flogi(struct fc_rport_priv *rdata)
832 struct fc_lport *lport = rdata->local_port;
835 if (!lport->point_to_multipoint)
836 return fc_rport_enter_plogi(rdata);
838 FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n",
839 fc_rport_state(rdata));
841 fc_rport_state_enter(rdata, RPORT_ST_FLOGI);
843 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
845 return fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
847 kref_get(&rdata->kref);
848 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI,
849 fc_rport_flogi_resp, rdata,
850 2 * lport->r_a_tov)) {
851 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
852 kref_put(&rdata->kref, fc_rport_destroy);
857 * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode
858 * @lport: The local port that received the PLOGI request
859 * @rx_fp: The PLOGI request frame
861 * Reference counting: drops kref on return
863 static void fc_rport_recv_flogi_req(struct fc_lport *lport,
864 struct fc_frame *rx_fp)
866 struct fc_disc *disc;
867 struct fc_els_flogi *flp;
868 struct fc_rport_priv *rdata;
869 struct fc_frame *fp = rx_fp;
870 struct fc_seq_els_data rjt_data;
873 sid = fc_frame_sid(fp);
875 FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n");
878 if (!lport->point_to_multipoint) {
879 rjt_data.reason = ELS_RJT_UNSUP;
880 rjt_data.explan = ELS_EXPL_NONE;
884 flp = fc_frame_payload_get(fp, sizeof(*flp));
886 rjt_data.reason = ELS_RJT_LOGIC;
887 rjt_data.explan = ELS_EXPL_INV_LEN;
891 rdata = fc_rport_lookup(lport, sid);
893 rjt_data.reason = ELS_RJT_FIP;
894 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
897 mutex_lock(&rdata->rp_mutex);
899 FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n",
900 fc_rport_state(rdata));
902 switch (rdata->rp_state) {
905 * If received the FLOGI request on RPORT which is INIT state
906 * (means not transition to FLOGI either fc_rport timeout
907 * function didn;t trigger or this end hasn;t received
908 * beacon yet from other end. In that case only, allow RPORT
909 * state machine to continue, otherwise fall through which
910 * causes the code to send reject response.
911 * NOTE; Not checking for FIP->state such as VNMP_UP or
912 * VNMP_CLAIM because if FIP state is not one of those,
913 * RPORT wouldn;t have created and 'rport_lookup' would have
914 * failed anyway in that case.
917 case RPORT_ST_DELETE:
918 mutex_unlock(&rdata->rp_mutex);
919 rjt_data.reason = ELS_RJT_FIP;
920 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
923 case RPORT_ST_PLOGI_WAIT:
931 * Set the remote port to be deleted and to then restart.
932 * This queues work to be sure exchanges are reset.
934 fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
935 mutex_unlock(&rdata->rp_mutex);
936 rjt_data.reason = ELS_RJT_BUSY;
937 rjt_data.explan = ELS_EXPL_NONE;
940 if (fc_rport_login_complete(rdata, fp)) {
941 mutex_unlock(&rdata->rp_mutex);
942 rjt_data.reason = ELS_RJT_LOGIC;
943 rjt_data.explan = ELS_EXPL_NONE;
947 fp = fc_frame_alloc(lport, sizeof(*flp));
951 fc_flogi_fill(lport, fp);
952 flp = fc_frame_payload_get(fp, sizeof(*flp));
953 flp->fl_cmd = ELS_LS_ACC;
955 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
956 lport->tt.frame_send(lport, fp);
959 * Do not proceed with the state machine if our
960 * FLOGI has crossed with an FLOGI from the
961 * remote port; wait for the FLOGI response instead.
963 if (rdata->rp_state != RPORT_ST_FLOGI) {
964 if (rdata->ids.port_name < lport->wwpn)
965 fc_rport_enter_plogi(rdata);
967 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
970 mutex_unlock(&rdata->rp_mutex);
971 kref_put(&rdata->kref, fc_rport_destroy);
972 fc_frame_free(rx_fp);
976 kref_put(&rdata->kref, fc_rport_destroy);
978 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
979 fc_frame_free(rx_fp);
983 * fc_rport_plogi_resp() - Handler for ELS PLOGI responses
984 * @sp: The sequence the PLOGI is on
985 * @fp: The PLOGI response frame
986 * @rdata_arg: The remote port that sent the PLOGI response
988 * Locking Note: This function will be called without the rport lock
989 * held, but it will lock, call an _enter_* function or fc_rport_error
990 * and then unlock the rport.
992 static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
995 struct fc_rport_priv *rdata = rdata_arg;
996 struct fc_lport *lport = rdata->local_port;
997 struct fc_els_flogi *plp = NULL;
1002 FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp));
1004 if (fp == ERR_PTR(-FC_EX_CLOSED))
1007 mutex_lock(&rdata->rp_mutex);
1009 if (rdata->rp_state != RPORT_ST_PLOGI) {
1010 FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state "
1011 "%s\n", fc_rport_state(rdata));
1018 fc_rport_error_retry(rdata, PTR_ERR(fp));
1022 op = fc_frame_payload_op(fp);
1023 if (op == ELS_LS_ACC &&
1024 (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) {
1025 rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn);
1026 rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn);
1028 /* save plogi response sp_features for further reference */
1029 rdata->sp_features = ntohs(plp->fl_csp.sp_features);
1031 if (lport->point_to_multipoint)
1032 fc_rport_login_complete(rdata, fp);
1033 csp_seq = ntohs(plp->fl_csp.sp_tot_seq);
1034 cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq);
1035 if (cssp_seq < csp_seq)
1037 rdata->max_seq = csp_seq;
1038 rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs);
1039 fc_rport_enter_prli(rdata);
1041 struct fc_els_ls_rjt *rjt;
1043 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1044 FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n",
1045 rjt->er_reason, rjt->er_explan);
1046 fc_rport_error_retry(rdata, -FC_EX_ELS_RJT);
1051 mutex_unlock(&rdata->rp_mutex);
1053 kref_put(&rdata->kref, fc_rport_destroy);
1057 fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata)
1059 if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN)
1061 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) &&
1062 (lport->service_params & FCP_SPPF_INIT_FCN))
1064 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) &&
1065 (lport->service_params & FCP_SPPF_TARG_FCN))
1071 * fc_rport_enter_plogi() - Send Port Login (PLOGI) request
1072 * @rdata: The remote port to send a PLOGI to
1074 * Locking Note: The rport lock is expected to be held before calling
1077 * Reference counting: increments kref when sending ELS
1079 static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
1081 struct fc_lport *lport = rdata->local_port;
1082 struct fc_frame *fp;
1084 if (!fc_rport_compatible_roles(lport, rdata)) {
1085 FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n");
1086 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
1090 FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
1091 fc_rport_state(rdata));
1093 fc_rport_state_enter(rdata, RPORT_ST_PLOGI);
1095 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
1096 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1098 FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__);
1099 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1102 rdata->e_d_tov = lport->e_d_tov;
1104 kref_get(&rdata->kref);
1105 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI,
1106 fc_rport_plogi_resp, rdata,
1107 2 * lport->r_a_tov)) {
1108 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1109 kref_put(&rdata->kref, fc_rport_destroy);
1114 * fc_rport_prli_resp() - Process Login (PRLI) response handler
1115 * @sp: The sequence the PRLI response was on
1116 * @fp: The PRLI response frame
1117 * @rdata_arg: The remote port that sent the PRLI response
1119 * Locking Note: This function will be called without the rport lock
1120 * held, but it will lock, call an _enter_* function or fc_rport_error
1121 * and then unlock the rport.
1123 static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
1126 struct fc_rport_priv *rdata = rdata_arg;
1128 struct fc_els_prli prli;
1129 struct fc_els_spp spp;
1131 struct fc_els_spp temp_spp;
1132 struct fc_els_ls_rjt *rjt;
1133 struct fc4_prov *prov;
1134 u32 roles = FC_RPORT_ROLE_UNKNOWN;
1137 enum fc_els_spp_resp resp_code;
1139 FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp));
1141 if (fp == ERR_PTR(-FC_EX_CLOSED))
1144 mutex_lock(&rdata->rp_mutex);
1146 if (rdata->rp_state != RPORT_ST_PRLI) {
1147 FC_RPORT_DBG(rdata, "Received a PRLI response, but in state "
1148 "%s\n", fc_rport_state(rdata));
1155 fc_rport_error_retry(rdata, PTR_ERR(fp));
1159 /* reinitialize remote port roles */
1160 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
1162 op = fc_frame_payload_op(fp);
1163 if (op == ELS_LS_ACC) {
1164 pp = fc_frame_payload_get(fp, sizeof(*pp));
1168 resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
1169 FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n",
1170 pp->spp.spp_flags, pp->spp.spp_type);
1171 rdata->spp_type = pp->spp.spp_type;
1172 if (resp_code != FC_SPP_RESP_ACK) {
1173 if (resp_code == FC_SPP_RESP_CONF)
1174 fc_rport_error(rdata, -FC_EX_SEQ_ERR);
1176 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1179 if (pp->prli.prli_spp_len < sizeof(pp->spp))
1182 fcp_parm = ntohl(pp->spp.spp_params);
1183 if (fcp_parm & FCP_SPPF_RETRY)
1184 rdata->flags |= FC_RP_FLAGS_RETRY;
1185 if (fcp_parm & FCP_SPPF_CONF_COMPL)
1186 rdata->flags |= FC_RP_FLAGS_CONF_REQ;
1189 * Call prli provider if we should act as a target
1191 prov = fc_passive_prov[rdata->spp_type];
1193 memset(&temp_spp, 0, sizeof(temp_spp));
1194 prov->prli(rdata, pp->prli.prli_spp_len,
1195 &pp->spp, &temp_spp);
1198 * Check if the image pair could be established
1200 if (rdata->spp_type != FC_TYPE_FCP ||
1201 !(pp->spp.spp_flags & FC_SPP_EST_IMG_PAIR)) {
1203 * Nope; we can't use this port as a target.
1205 fcp_parm &= ~FCP_SPPF_TARG_FCN;
1207 rdata->supported_classes = FC_COS_CLASS3;
1208 if (fcp_parm & FCP_SPPF_INIT_FCN)
1209 roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1210 if (fcp_parm & FCP_SPPF_TARG_FCN)
1211 roles |= FC_RPORT_ROLE_FCP_TARGET;
1213 rdata->ids.roles = roles;
1214 fc_rport_enter_rtv(rdata);
1217 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1218 FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
1219 rjt->er_reason, rjt->er_explan);
1220 fc_rport_error_retry(rdata, FC_EX_ELS_RJT);
1226 mutex_unlock(&rdata->rp_mutex);
1228 kref_put(&rdata->kref, fc_rport_destroy);
1232 * fc_rport_enter_prli() - Send Process Login (PRLI) request
1233 * @rdata: The remote port to send the PRLI request to
1235 * Locking Note: The rport lock is expected to be held before calling
1238 * Reference counting: increments kref when sending ELS
1240 static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
1242 struct fc_lport *lport = rdata->local_port;
1244 struct fc_els_prli prli;
1245 struct fc_els_spp spp;
1247 struct fc_frame *fp;
1248 struct fc4_prov *prov;
1251 * If the rport is one of the well known addresses
1252 * we skip PRLI and RTV and go straight to READY.
1254 if (rdata->ids.port_id >= FC_FID_DOM_MGR) {
1255 fc_rport_enter_ready(rdata);
1260 * And if the local port does not support the initiator function
1261 * there's no need to send a PRLI, either.
1263 if (!(lport->service_params & FCP_SPPF_INIT_FCN)) {
1264 fc_rport_enter_ready(rdata);
1268 FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n",
1269 fc_rport_state(rdata));
1271 fc_rport_state_enter(rdata, RPORT_ST_PRLI);
1273 fp = fc_frame_alloc(lport, sizeof(*pp));
1275 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1279 fc_prli_fill(lport, fp);
1281 prov = fc_passive_prov[FC_TYPE_FCP];
1283 pp = fc_frame_payload_get(fp, sizeof(*pp));
1284 prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp);
1287 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id,
1288 fc_host_port_id(lport->host), FC_TYPE_ELS,
1289 FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
1291 kref_get(&rdata->kref);
1292 if (!fc_exch_seq_send(lport, fp, fc_rport_prli_resp,
1293 NULL, rdata, 2 * lport->r_a_tov)) {
1294 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1295 kref_put(&rdata->kref, fc_rport_destroy);
1300 * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses
1301 * @sp: The sequence the RTV was on
1302 * @fp: The RTV response frame
1303 * @rdata_arg: The remote port that sent the RTV response
1305 * Many targets don't seem to support this.
1307 * Locking Note: This function will be called without the rport lock
1308 * held, but it will lock, call an _enter_* function or fc_rport_error
1309 * and then unlock the rport.
1311 static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
1314 struct fc_rport_priv *rdata = rdata_arg;
1317 FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp));
1319 if (fp == ERR_PTR(-FC_EX_CLOSED))
1322 mutex_lock(&rdata->rp_mutex);
1324 if (rdata->rp_state != RPORT_ST_RTV) {
1325 FC_RPORT_DBG(rdata, "Received a RTV response, but in state "
1326 "%s\n", fc_rport_state(rdata));
1333 fc_rport_error(rdata, PTR_ERR(fp));
1337 op = fc_frame_payload_op(fp);
1338 if (op == ELS_LS_ACC) {
1339 struct fc_els_rtv_acc *rtv;
1343 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1345 toq = ntohl(rtv->rtv_toq);
1346 tov = ntohl(rtv->rtv_r_a_tov);
1349 if (tov > rdata->r_a_tov)
1350 rdata->r_a_tov = tov;
1351 tov = ntohl(rtv->rtv_e_d_tov);
1352 if (toq & FC_ELS_RTV_EDRES)
1356 if (tov > rdata->e_d_tov)
1357 rdata->e_d_tov = tov;
1361 fc_rport_enter_ready(rdata);
1366 mutex_unlock(&rdata->rp_mutex);
1368 kref_put(&rdata->kref, fc_rport_destroy);
1372 * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request
1373 * @rdata: The remote port to send the RTV request to
1375 * Locking Note: The rport lock is expected to be held before calling
1378 * Reference counting: increments kref when sending ELS
1380 static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
1382 struct fc_frame *fp;
1383 struct fc_lport *lport = rdata->local_port;
1385 FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n",
1386 fc_rport_state(rdata));
1388 fc_rport_state_enter(rdata, RPORT_ST_RTV);
1390 fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
1392 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1396 kref_get(&rdata->kref);
1397 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
1398 fc_rport_rtv_resp, rdata,
1399 2 * lport->r_a_tov)) {
1400 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1401 kref_put(&rdata->kref, fc_rport_destroy);
1406 * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests
1407 * @rdata: The remote port that sent the RTV request
1408 * @in_fp: The RTV request frame
1410 * Locking Note: Called with the lport and rport locks held.
1412 static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata,
1413 struct fc_frame *in_fp)
1415 struct fc_lport *lport = rdata->local_port;
1416 struct fc_frame *fp;
1417 struct fc_els_rtv_acc *rtv;
1418 struct fc_seq_els_data rjt_data;
1420 FC_RPORT_DBG(rdata, "Received RTV request\n");
1422 fp = fc_frame_alloc(lport, sizeof(*rtv));
1424 rjt_data.reason = ELS_RJT_UNAB;
1425 rjt_data.explan = ELS_EXPL_INSUF_RES;
1426 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1429 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1430 rtv->rtv_cmd = ELS_LS_ACC;
1431 rtv->rtv_r_a_tov = htonl(lport->r_a_tov);
1432 rtv->rtv_e_d_tov = htonl(lport->e_d_tov);
1434 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1435 lport->tt.frame_send(lport, fp);
1437 fc_frame_free(in_fp);
1441 * fc_rport_logo_resp() - Handler for logout (LOGO) responses
1442 * @sp: The sequence the LOGO was on
1443 * @fp: The LOGO response frame
1444 * @lport_arg: The local port
1446 static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1449 struct fc_rport_priv *rdata = rdata_arg;
1450 struct fc_lport *lport = rdata->local_port;
1452 FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did,
1453 "Received a LOGO %s\n", fc_els_resp_type(fp));
1456 kref_put(&rdata->kref, fc_rport_destroy);
1460 * fc_rport_enter_logo() - Send a logout (LOGO) request
1461 * @rdata: The remote port to send the LOGO request to
1463 * Locking Note: The rport lock is expected to be held before calling
1466 * Reference counting: increments kref when sending ELS
1468 static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
1470 struct fc_lport *lport = rdata->local_port;
1471 struct fc_frame *fp;
1473 FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n",
1474 fc_rport_state(rdata));
1476 fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
1479 kref_get(&rdata->kref);
1480 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
1481 fc_rport_logo_resp, rdata, 0))
1482 kref_put(&rdata->kref, fc_rport_destroy);
1486 * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses
1487 * @sp: The sequence the ADISC response was on
1488 * @fp: The ADISC response frame
1489 * @rdata_arg: The remote port that sent the ADISC response
1491 * Locking Note: This function will be called without the rport lock
1492 * held, but it will lock, call an _enter_* function or fc_rport_error
1493 * and then unlock the rport.
1495 static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
1498 struct fc_rport_priv *rdata = rdata_arg;
1499 struct fc_els_adisc *adisc;
1502 FC_RPORT_DBG(rdata, "Received a ADISC response\n");
1504 if (fp == ERR_PTR(-FC_EX_CLOSED))
1507 mutex_lock(&rdata->rp_mutex);
1509 if (rdata->rp_state != RPORT_ST_ADISC) {
1510 FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n",
1511 fc_rport_state(rdata));
1518 fc_rport_error(rdata, PTR_ERR(fp));
1523 * If address verification failed. Consider us logged out of the rport.
1524 * Since the rport is still in discovery, we want to be
1525 * logged in, so go to PLOGI state. Otherwise, go back to READY.
1527 op = fc_frame_payload_op(fp);
1528 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1529 if (op != ELS_LS_ACC || !adisc ||
1530 ntoh24(adisc->adisc_port_id) != rdata->ids.port_id ||
1531 get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
1532 get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
1533 FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
1534 fc_rport_enter_flogi(rdata);
1536 FC_RPORT_DBG(rdata, "ADISC OK\n");
1537 fc_rport_enter_ready(rdata);
1542 mutex_unlock(&rdata->rp_mutex);
1544 kref_put(&rdata->kref, fc_rport_destroy);
1548 * fc_rport_enter_adisc() - Send Address Discover (ADISC) request
1549 * @rdata: The remote port to send the ADISC request to
1551 * Locking Note: The rport lock is expected to be held before calling
1554 * Reference counting: increments kref when sending ELS
1556 static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
1558 struct fc_lport *lport = rdata->local_port;
1559 struct fc_frame *fp;
1561 FC_RPORT_DBG(rdata, "sending ADISC from %s state\n",
1562 fc_rport_state(rdata));
1564 fc_rport_state_enter(rdata, RPORT_ST_ADISC);
1566 fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc));
1568 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1571 kref_get(&rdata->kref);
1572 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC,
1573 fc_rport_adisc_resp, rdata,
1574 2 * lport->r_a_tov)) {
1575 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1576 kref_put(&rdata->kref, fc_rport_destroy);
1581 * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
1582 * @rdata: The remote port that sent the ADISC request
1583 * @in_fp: The ADISC request frame
1585 * Locking Note: Called with the lport and rport locks held.
1587 static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
1588 struct fc_frame *in_fp)
1590 struct fc_lport *lport = rdata->local_port;
1591 struct fc_frame *fp;
1592 struct fc_els_adisc *adisc;
1593 struct fc_seq_els_data rjt_data;
1595 FC_RPORT_DBG(rdata, "Received ADISC request\n");
1597 adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
1599 rjt_data.reason = ELS_RJT_PROT;
1600 rjt_data.explan = ELS_EXPL_INV_LEN;
1601 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1605 fp = fc_frame_alloc(lport, sizeof(*adisc));
1608 fc_adisc_fill(lport, fp);
1609 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1610 adisc->adisc_cmd = ELS_LS_ACC;
1611 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1612 lport->tt.frame_send(lport, fp);
1614 fc_frame_free(in_fp);
1618 * fc_rport_recv_rls_req() - Handle received Read Link Status request
1619 * @rdata: The remote port that sent the RLS request
1620 * @rx_fp: The PRLI request frame
1622 * Locking Note: The rport lock is expected to be held before calling
1625 static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
1626 struct fc_frame *rx_fp)
1629 struct fc_lport *lport = rdata->local_port;
1630 struct fc_frame *fp;
1631 struct fc_els_rls *rls;
1632 struct fc_els_rls_resp *rsp;
1633 struct fc_els_lesb *lesb;
1634 struct fc_seq_els_data rjt_data;
1635 struct fc_host_statistics *hst;
1637 FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
1638 fc_rport_state(rdata));
1640 rls = fc_frame_payload_get(rx_fp, sizeof(*rls));
1642 rjt_data.reason = ELS_RJT_PROT;
1643 rjt_data.explan = ELS_EXPL_INV_LEN;
1647 fp = fc_frame_alloc(lport, sizeof(*rsp));
1649 rjt_data.reason = ELS_RJT_UNAB;
1650 rjt_data.explan = ELS_EXPL_INSUF_RES;
1654 rsp = fc_frame_payload_get(fp, sizeof(*rsp));
1655 memset(rsp, 0, sizeof(*rsp));
1656 rsp->rls_cmd = ELS_LS_ACC;
1657 lesb = &rsp->rls_lesb;
1658 if (lport->tt.get_lesb) {
1659 /* get LESB from LLD if it supports it */
1660 lport->tt.get_lesb(lport, lesb);
1662 fc_get_host_stats(lport->host);
1663 hst = &lport->host_stats;
1664 lesb->lesb_link_fail = htonl(hst->link_failure_count);
1665 lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count);
1666 lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count);
1667 lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count);
1668 lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count);
1669 lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
1672 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1673 lport->tt.frame_send(lport, fp);
1677 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
1679 fc_frame_free(rx_fp);
1683 * fc_rport_recv_els_req() - Handler for validated ELS requests
1684 * @lport: The local port that received the ELS request
1685 * @fp: The ELS request frame
1687 * Handle incoming ELS requests that require port login.
1688 * The ELS opcode has already been validated by the caller.
1690 * Locking Note: Called with the lport lock held.
1692 * Reference counting: does not modify kref
1694 static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
1696 struct fc_rport_priv *rdata;
1697 struct fc_seq_els_data els_data;
1699 rdata = fc_rport_lookup(lport, fc_frame_sid(fp));
1701 FC_RPORT_ID_DBG(lport, fc_frame_sid(fp),
1702 "Received ELS 0x%02x from non-logged-in port\n",
1703 fc_frame_payload_op(fp));
1707 mutex_lock(&rdata->rp_mutex);
1709 switch (rdata->rp_state) {
1712 case RPORT_ST_READY:
1713 case RPORT_ST_ADISC:
1715 case RPORT_ST_PLOGI:
1716 if (fc_frame_payload_op(fp) == ELS_PRLI) {
1717 FC_RPORT_DBG(rdata, "Reject ELS PRLI "
1718 "while in state %s\n",
1719 fc_rport_state(rdata));
1720 mutex_unlock(&rdata->rp_mutex);
1721 kref_put(&rdata->kref, fc_rport_destroy);
1726 "Reject ELS 0x%02x while in state %s\n",
1727 fc_frame_payload_op(fp), fc_rport_state(rdata));
1728 mutex_unlock(&rdata->rp_mutex);
1729 kref_put(&rdata->kref, fc_rport_destroy);
1733 switch (fc_frame_payload_op(fp)) {
1735 fc_rport_recv_prli_req(rdata, fp);
1738 fc_rport_recv_prlo_req(rdata, fp);
1741 fc_rport_recv_adisc_req(rdata, fp);
1744 fc_seq_els_rsp_send(fp, ELS_RRQ, NULL);
1748 fc_seq_els_rsp_send(fp, ELS_REC, NULL);
1752 fc_rport_recv_rls_req(rdata, fp);
1755 fc_rport_recv_rtv_req(rdata, fp);
1758 fc_frame_free(fp); /* can't happen */
1762 mutex_unlock(&rdata->rp_mutex);
1763 kref_put(&rdata->kref, fc_rport_destroy);
1767 els_data.reason = ELS_RJT_UNAB;
1768 els_data.explan = ELS_EXPL_PLOGI_REQD;
1769 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1774 els_data.reason = ELS_RJT_BUSY;
1775 els_data.explan = ELS_EXPL_NONE;
1776 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1782 * fc_rport_recv_req() - Handler for requests
1783 * @lport: The local port that received the request
1784 * @fp: The request frame
1786 * Locking Note: Called with the lport lock held.
1788 * Reference counting: does not modify kref
1790 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
1792 struct fc_seq_els_data els_data;
1795 * Handle FLOGI, PLOGI and LOGO requests separately, since they
1796 * don't require prior login.
1797 * Check for unsupported opcodes first and reject them.
1798 * For some ops, it would be incorrect to reject with "PLOGI required".
1800 switch (fc_frame_payload_op(fp)) {
1802 fc_rport_recv_flogi_req(lport, fp);
1805 fc_rport_recv_plogi_req(lport, fp);
1808 fc_rport_recv_logo_req(lport, fp);
1817 fc_rport_recv_els_req(lport, fp);
1820 els_data.reason = ELS_RJT_UNSUP;
1821 els_data.explan = ELS_EXPL_NONE;
1822 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1827 EXPORT_SYMBOL(fc_rport_recv_req);
1830 * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
1831 * @lport: The local port that received the PLOGI request
1832 * @rx_fp: The PLOGI request frame
1834 * Locking Note: The rport lock is held before calling this function.
1836 * Reference counting: increments kref on return
1838 static void fc_rport_recv_plogi_req(struct fc_lport *lport,
1839 struct fc_frame *rx_fp)
1841 struct fc_disc *disc;
1842 struct fc_rport_priv *rdata;
1843 struct fc_frame *fp = rx_fp;
1844 struct fc_els_flogi *pl;
1845 struct fc_seq_els_data rjt_data;
1848 sid = fc_frame_sid(fp);
1850 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
1852 pl = fc_frame_payload_get(fp, sizeof(*pl));
1854 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n");
1855 rjt_data.reason = ELS_RJT_PROT;
1856 rjt_data.explan = ELS_EXPL_INV_LEN;
1860 disc = &lport->disc;
1861 mutex_lock(&disc->disc_mutex);
1862 rdata = fc_rport_create(lport, sid);
1864 mutex_unlock(&disc->disc_mutex);
1865 rjt_data.reason = ELS_RJT_UNAB;
1866 rjt_data.explan = ELS_EXPL_INSUF_RES;
1870 mutex_lock(&rdata->rp_mutex);
1871 mutex_unlock(&disc->disc_mutex);
1873 rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn);
1874 rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn);
1877 * If the rport was just created, possibly due to the incoming PLOGI,
1878 * set the state appropriately and accept the PLOGI.
1880 * If we had also sent a PLOGI, and if the received PLOGI is from a
1881 * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason
1882 * "command already in progress".
1884 * XXX TBD: If the session was ready before, the PLOGI should result in
1885 * all outstanding exchanges being reset.
1887 switch (rdata->rp_state) {
1889 FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
1891 case RPORT_ST_PLOGI_WAIT:
1892 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n");
1894 case RPORT_ST_PLOGI:
1895 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
1896 if (rdata->ids.port_name < lport->wwpn) {
1897 mutex_unlock(&rdata->rp_mutex);
1898 rjt_data.reason = ELS_RJT_INPROG;
1899 rjt_data.explan = ELS_EXPL_NONE;
1905 case RPORT_ST_READY:
1906 case RPORT_ST_ADISC:
1907 FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d "
1908 "- ignored for now\n", rdata->rp_state);
1909 /* XXX TBD - should reset */
1911 case RPORT_ST_FLOGI:
1912 case RPORT_ST_DELETE:
1913 FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n",
1914 fc_rport_state(rdata));
1915 mutex_unlock(&rdata->rp_mutex);
1916 rjt_data.reason = ELS_RJT_BUSY;
1917 rjt_data.explan = ELS_EXPL_NONE;
1920 if (!fc_rport_compatible_roles(lport, rdata)) {
1921 FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n");
1922 mutex_unlock(&rdata->rp_mutex);
1923 rjt_data.reason = ELS_RJT_LOGIC;
1924 rjt_data.explan = ELS_EXPL_NONE;
1929 * Get session payload size from incoming PLOGI.
1931 rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
1934 * Send LS_ACC. If this fails, the originator should retry.
1936 fp = fc_frame_alloc(lport, sizeof(*pl));
1940 fc_plogi_fill(lport, fp, ELS_LS_ACC);
1941 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1942 lport->tt.frame_send(lport, fp);
1943 fc_rport_enter_prli(rdata);
1945 mutex_unlock(&rdata->rp_mutex);
1946 fc_frame_free(rx_fp);
1950 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
1955 * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
1956 * @rdata: The remote port that sent the PRLI request
1957 * @rx_fp: The PRLI request frame
1959 * Locking Note: The rport lock is expected to be held before calling
1962 static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
1963 struct fc_frame *rx_fp)
1965 struct fc_lport *lport = rdata->local_port;
1966 struct fc_frame *fp;
1968 struct fc_els_prli prli;
1969 struct fc_els_spp spp;
1971 struct fc_els_spp *rspp; /* request service param page */
1972 struct fc_els_spp *spp; /* response spp */
1975 enum fc_els_spp_resp resp;
1976 struct fc_seq_els_data rjt_data;
1977 struct fc4_prov *prov;
1979 FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
1980 fc_rport_state(rdata));
1982 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
1983 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
1986 plen = ntohs(pp->prli.prli_len);
1987 if ((plen % 4) != 0 || plen > len || plen < 16)
1991 plen = pp->prli.prli_spp_len;
1992 if ((plen % 4) != 0 || plen < sizeof(*spp) ||
1993 plen > len || len < sizeof(*pp) || plen < 12)
1997 fp = fc_frame_alloc(lport, len);
1999 rjt_data.reason = ELS_RJT_UNAB;
2000 rjt_data.explan = ELS_EXPL_INSUF_RES;
2003 pp = fc_frame_payload_get(fp, len);
2006 pp->prli.prli_cmd = ELS_LS_ACC;
2007 pp->prli.prli_spp_len = plen;
2008 pp->prli.prli_len = htons(len);
2009 len -= sizeof(struct fc_els_prli);
2012 * Go through all the service parameter pages and build
2013 * response. If plen indicates longer SPP than standard,
2014 * use that. The entire response has been pre-cleared above.
2017 mutex_lock(&fc_prov_mutex);
2018 while (len >= plen) {
2019 rdata->spp_type = rspp->spp_type;
2020 spp->spp_type = rspp->spp_type;
2021 spp->spp_type_ext = rspp->spp_type_ext;
2024 if (rspp->spp_type < FC_FC4_PROV_SIZE) {
2025 enum fc_els_spp_resp active = 0, passive = 0;
2027 prov = fc_active_prov[rspp->spp_type];
2029 active = prov->prli(rdata, plen, rspp, spp);
2030 prov = fc_passive_prov[rspp->spp_type];
2032 passive = prov->prli(rdata, plen, rspp, spp);
2033 if (!active || passive == FC_SPP_RESP_ACK)
2037 FC_RPORT_DBG(rdata, "PRLI rspp type %x "
2038 "active %x passive %x\n",
2039 rspp->spp_type, active, passive);
2042 if (spp->spp_flags & FC_SPP_EST_IMG_PAIR)
2043 resp |= FC_SPP_RESP_CONF;
2045 resp |= FC_SPP_RESP_INVL;
2047 spp->spp_flags |= resp;
2049 rspp = (struct fc_els_spp *)((char *)rspp + plen);
2050 spp = (struct fc_els_spp *)((char *)spp + plen);
2052 mutex_unlock(&fc_prov_mutex);
2055 * Send LS_ACC. If this fails, the originator should retry.
2057 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2058 lport->tt.frame_send(lport, fp);
2063 rjt_data.reason = ELS_RJT_PROT;
2064 rjt_data.explan = ELS_EXPL_INV_LEN;
2066 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2068 fc_frame_free(rx_fp);
2072 * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
2073 * @rdata: The remote port that sent the PRLO request
2074 * @rx_fp: The PRLO request frame
2076 * Locking Note: The rport lock is expected to be held before calling
2079 static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
2080 struct fc_frame *rx_fp)
2082 struct fc_lport *lport = rdata->local_port;
2083 struct fc_frame *fp;
2085 struct fc_els_prlo prlo;
2086 struct fc_els_spp spp;
2088 struct fc_els_spp *rspp; /* request service param page */
2089 struct fc_els_spp *spp; /* response spp */
2092 struct fc_seq_els_data rjt_data;
2094 FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
2095 fc_rport_state(rdata));
2097 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
2098 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
2101 plen = ntohs(pp->prlo.prlo_len);
2109 fp = fc_frame_alloc(lport, len);
2111 rjt_data.reason = ELS_RJT_UNAB;
2112 rjt_data.explan = ELS_EXPL_INSUF_RES;
2116 pp = fc_frame_payload_get(fp, len);
2119 pp->prlo.prlo_cmd = ELS_LS_ACC;
2120 pp->prlo.prlo_obs = 0x10;
2121 pp->prlo.prlo_len = htons(len);
2123 spp->spp_type = rspp->spp_type;
2124 spp->spp_type_ext = rspp->spp_type_ext;
2125 spp->spp_flags = FC_SPP_RESP_ACK;
2127 fc_rport_enter_prli(rdata);
2129 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2130 lport->tt.frame_send(lport, fp);
2134 rjt_data.reason = ELS_RJT_PROT;
2135 rjt_data.explan = ELS_EXPL_INV_LEN;
2137 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2139 fc_frame_free(rx_fp);
2143 * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
2144 * @lport: The local port that received the LOGO request
2145 * @fp: The LOGO request frame
2147 * Locking Note: The rport lock is expected to be held before calling
2150 * Reference counting: drops kref on return
2152 static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
2154 struct fc_rport_priv *rdata;
2157 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
2159 sid = fc_frame_sid(fp);
2161 rdata = fc_rport_lookup(lport, sid);
2163 mutex_lock(&rdata->rp_mutex);
2164 FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
2165 fc_rport_state(rdata));
2167 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
2168 mutex_unlock(&rdata->rp_mutex);
2169 kref_put(&rdata->kref, fc_rport_destroy);
2171 FC_RPORT_ID_DBG(lport, sid,
2172 "Received LOGO from non-logged-in port\n");
2177 * fc_rport_flush_queue() - Flush the rport_event_queue
2179 void fc_rport_flush_queue(void)
2181 flush_workqueue(rport_event_queue);
2183 EXPORT_SYMBOL(fc_rport_flush_queue);
2186 * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator.
2187 * @rdata: remote port private
2188 * @spp_len: service parameter page length
2189 * @rspp: received service parameter page
2190 * @spp: response service parameter page
2192 * Returns the value for the response code to be placed in spp_flags;
2193 * Returns 0 if not an initiator.
2195 static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len,
2196 const struct fc_els_spp *rspp,
2197 struct fc_els_spp *spp)
2199 struct fc_lport *lport = rdata->local_port;
2202 fcp_parm = ntohl(rspp->spp_params);
2203 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
2204 if (fcp_parm & FCP_SPPF_INIT_FCN)
2205 rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
2206 if (fcp_parm & FCP_SPPF_TARG_FCN)
2207 rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
2208 if (fcp_parm & FCP_SPPF_RETRY)
2209 rdata->flags |= FC_RP_FLAGS_RETRY;
2210 rdata->supported_classes = FC_COS_CLASS3;
2212 if (!(lport->service_params & FCP_SPPF_INIT_FCN))
2215 spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
2218 * OR in our service parameters with other providers (target), if any.
2220 fcp_parm = ntohl(spp->spp_params);
2221 spp->spp_params = htonl(fcp_parm | lport->service_params);
2222 return FC_SPP_RESP_ACK;
2226 * FC-4 provider ops for FCP initiator.
2228 struct fc4_prov fc_rport_fcp_init = {
2229 .prli = fc_rport_fcp_prli,
2233 * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0
2234 * @rdata: remote port private
2235 * @spp_len: service parameter page length
2236 * @rspp: received service parameter page
2237 * @spp: response service parameter page
2239 static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len,
2240 const struct fc_els_spp *rspp,
2241 struct fc_els_spp *spp)
2243 if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR)
2244 return FC_SPP_RESP_INVL;
2245 return FC_SPP_RESP_ACK;
2249 * FC-4 provider ops for type 0 service parameters.
2251 * This handles the special case of type 0 which is always successful
2252 * but doesn't do anything otherwise.
2254 struct fc4_prov fc_rport_t0_prov = {
2255 .prli = fc_rport_t0_prli,
2259 * fc_setup_rport() - Initialize the rport_event_queue
2261 int fc_setup_rport(void)
2263 rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
2264 if (!rport_event_queue)
2270 * fc_destroy_rport() - Destroy the rport_event_queue
2272 void fc_destroy_rport(void)
2274 destroy_workqueue(rport_event_queue);
2278 * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port
2279 * @rport: The remote port whose I/O should be terminated
2281 void fc_rport_terminate_io(struct fc_rport *rport)
2283 struct fc_rport_libfc_priv *rpriv = rport->dd_data;
2284 struct fc_lport *lport = rpriv->local_port;
2286 lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
2287 lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
2289 EXPORT_SYMBOL(fc_rport_terminate_io);