1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright(c) 2007 - 2008 Intel Corporation. All rights reserved.
5 * Maintained at www.Open-FCoE.org
11 * This file contains all processing regarding fc_rports. It contains the
12 * rport state machine and does all rport interaction with the transport class.
13 * There should be no other places in libfc that interact directly with the
14 * transport class in regards to adding and deleting rports.
16 * fc_rport's represent N_Port's within the fabric.
22 * The rport should never hold the rport mutex and then attempt to acquire
23 * either the lport or disc mutexes. The rport's mutex is considered lesser
24 * than both the lport's mutex and the disc mutex. Refer to fc_lport.c for
25 * more comments on the hierarchy.
27 * The locking strategy is similar to the lport's strategy. The lock protects
28 * the rport's states and is held and released by the entry points to the rport
29 * block. All _enter_* functions correspond to rport states and expect the rport
30 * mutex to be locked before calling them. This means that rports only handle
31 * one request or response at a time, since they're not critical for the I/O
32 * path this potential over-use of the mutex is acceptable.
36 * RPORT REFERENCE COUNTING
38 * A rport reference should be taken when:
39 * - an rport is allocated
40 * - a workqueue item is scheduled
41 * - an ELS request is send
42 * The reference should be dropped when:
43 * - the workqueue function has finished
44 * - the ELS response is handled
45 * - an rport is removed
48 #include <linux/kernel.h>
49 #include <linux/spinlock.h>
50 #include <linux/interrupt.h>
51 #include <linux/slab.h>
52 #include <linux/rcupdate.h>
53 #include <linux/timer.h>
54 #include <linux/workqueue.h>
55 #include <linux/export.h>
56 #include <linux/rculist.h>
58 #include <asm/unaligned.h>
60 #include <scsi/libfc.h>
61 #include <scsi/fc_encode.h>
65 static struct workqueue_struct *rport_event_queue;
67 static void fc_rport_enter_flogi(struct fc_rport_priv *);
68 static void fc_rport_enter_plogi(struct fc_rport_priv *);
69 static void fc_rport_enter_prli(struct fc_rport_priv *);
70 static void fc_rport_enter_rtv(struct fc_rport_priv *);
71 static void fc_rport_enter_ready(struct fc_rport_priv *);
72 static void fc_rport_enter_logo(struct fc_rport_priv *);
73 static void fc_rport_enter_adisc(struct fc_rport_priv *);
75 static void fc_rport_recv_plogi_req(struct fc_lport *, struct fc_frame *);
76 static void fc_rport_recv_prli_req(struct fc_rport_priv *, struct fc_frame *);
77 static void fc_rport_recv_prlo_req(struct fc_rport_priv *, struct fc_frame *);
78 static void fc_rport_recv_logo_req(struct fc_lport *, struct fc_frame *);
79 static void fc_rport_timeout(struct work_struct *);
80 static void fc_rport_error(struct fc_rport_priv *, int);
81 static void fc_rport_error_retry(struct fc_rport_priv *, int);
82 static void fc_rport_work(struct work_struct *);
84 static const char *fc_rport_state_names[] = {
85 [RPORT_ST_INIT] = "Init",
86 [RPORT_ST_FLOGI] = "FLOGI",
87 [RPORT_ST_PLOGI_WAIT] = "PLOGI_WAIT",
88 [RPORT_ST_PLOGI] = "PLOGI",
89 [RPORT_ST_PRLI] = "PRLI",
90 [RPORT_ST_RTV] = "RTV",
91 [RPORT_ST_READY] = "Ready",
92 [RPORT_ST_ADISC] = "ADISC",
93 [RPORT_ST_DELETE] = "Delete",
97 * fc_rport_lookup() - Lookup a remote port by port_id
98 * @lport: The local port to lookup the remote port on
99 * @port_id: The remote port ID to look up
101 * The reference count of the fc_rport_priv structure is
104 struct fc_rport_priv *fc_rport_lookup(const struct fc_lport *lport,
107 struct fc_rport_priv *rdata = NULL, *tmp_rdata;
110 list_for_each_entry_rcu(tmp_rdata, &lport->disc.rports, peers)
111 if (tmp_rdata->ids.port_id == port_id &&
112 kref_get_unless_zero(&tmp_rdata->kref)) {
119 EXPORT_SYMBOL(fc_rport_lookup);
122 * fc_rport_create() - Create a new remote port
123 * @lport: The local port this remote port will be associated with
124 * @ids: The identifiers for the new remote port
126 * The remote port will start in the INIT state.
128 struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, u32 port_id)
130 struct fc_rport_priv *rdata;
131 size_t rport_priv_size = sizeof(*rdata);
133 lockdep_assert_held(&lport->disc.disc_mutex);
135 rdata = fc_rport_lookup(lport, port_id);
139 if (lport->rport_priv_size > 0)
140 rport_priv_size = lport->rport_priv_size;
141 rdata = kzalloc(rport_priv_size, GFP_KERNEL);
145 rdata->ids.node_name = -1;
146 rdata->ids.port_name = -1;
147 rdata->ids.port_id = port_id;
148 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
150 kref_init(&rdata->kref);
151 mutex_init(&rdata->rp_mutex);
152 rdata->local_port = lport;
153 rdata->rp_state = RPORT_ST_INIT;
154 rdata->event = RPORT_EV_NONE;
155 rdata->flags = FC_RP_FLAGS_REC_SUPPORTED;
156 rdata->e_d_tov = lport->e_d_tov;
157 rdata->r_a_tov = lport->r_a_tov;
158 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
159 INIT_DELAYED_WORK(&rdata->retry_work, fc_rport_timeout);
160 INIT_WORK(&rdata->event_work, fc_rport_work);
161 if (port_id != FC_FID_DIR_SERV) {
162 rdata->lld_event_callback = lport->tt.rport_event_callback;
163 list_add_rcu(&rdata->peers, &lport->disc.rports);
167 EXPORT_SYMBOL(fc_rport_create);
170 * fc_rport_destroy() - Free a remote port after last reference is released
171 * @kref: The remote port's kref
173 void fc_rport_destroy(struct kref *kref)
175 struct fc_rport_priv *rdata;
177 rdata = container_of(kref, struct fc_rport_priv, kref);
178 kfree_rcu(rdata, rcu);
180 EXPORT_SYMBOL(fc_rport_destroy);
183 * fc_rport_state() - Return a string identifying the remote port's state
184 * @rdata: The remote port
186 static const char *fc_rport_state(struct fc_rport_priv *rdata)
190 cp = fc_rport_state_names[rdata->rp_state];
197 * fc_set_rport_loss_tmo() - Set the remote port loss timeout
198 * @rport: The remote port that gets a new timeout value
199 * @timeout: The new timeout value (in seconds)
201 void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
204 rport->dev_loss_tmo = timeout;
206 rport->dev_loss_tmo = 1;
208 EXPORT_SYMBOL(fc_set_rport_loss_tmo);
211 * fc_plogi_get_maxframe() - Get the maximum payload from the common service
212 * parameters in a FLOGI frame
213 * @flp: The FLOGI or PLOGI payload
214 * @maxval: The maximum frame size upper limit; this may be less than what
215 * is in the service parameters
217 static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
223 * Get max payload from the common service parameters and the
224 * class 3 receive data field size.
226 mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK;
227 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
229 mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs);
230 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
236 * fc_rport_state_enter() - Change the state of a remote port
237 * @rdata: The remote port whose state should change
238 * @new: The new state
240 static void fc_rport_state_enter(struct fc_rport_priv *rdata,
241 enum fc_rport_state new)
243 lockdep_assert_held(&rdata->rp_mutex);
245 if (rdata->rp_state != new)
247 rdata->rp_state = new;
251 * fc_rport_work() - Handler for remote port events in the rport_event_queue
252 * @work: Handle to the remote port being dequeued
254 * Reference counting: drops kref on return
256 static void fc_rport_work(struct work_struct *work)
259 struct fc_rport_priv *rdata =
260 container_of(work, struct fc_rport_priv, event_work);
261 struct fc_rport_libfc_priv *rpriv;
262 enum fc_rport_event event;
263 struct fc_lport *lport = rdata->local_port;
264 struct fc_rport_operations *rport_ops;
265 struct fc_rport_identifiers ids;
266 struct fc_rport *rport;
267 struct fc4_prov *prov;
270 mutex_lock(&rdata->rp_mutex);
271 event = rdata->event;
272 rport_ops = rdata->ops;
273 rport = rdata->rport;
275 FC_RPORT_DBG(rdata, "work event %u\n", event);
280 rdata->event = RPORT_EV_NONE;
281 rdata->major_retries = 0;
282 kref_get(&rdata->kref);
283 mutex_unlock(&rdata->rp_mutex);
286 FC_RPORT_DBG(rdata, "No rport!\n");
287 rport = fc_remote_port_add(lport->host, 0, &ids);
290 FC_RPORT_DBG(rdata, "Failed to add the rport\n");
291 fc_rport_logoff(rdata);
292 kref_put(&rdata->kref, fc_rport_destroy);
295 mutex_lock(&rdata->rp_mutex);
297 FC_RPORT_DBG(rdata, "rport already allocated\n");
298 rdata->rport = rport;
299 rport->maxframe_size = rdata->maxframe_size;
300 rport->supported_classes = rdata->supported_classes;
302 rpriv = rport->dd_data;
303 rpriv->local_port = lport;
304 rpriv->rp_state = rdata->rp_state;
305 rpriv->flags = rdata->flags;
306 rpriv->e_d_tov = rdata->e_d_tov;
307 rpriv->r_a_tov = rdata->r_a_tov;
308 mutex_unlock(&rdata->rp_mutex);
310 if (rport_ops && rport_ops->event_callback) {
311 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
312 rport_ops->event_callback(lport, rdata, event);
314 if (rdata->lld_event_callback) {
315 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
316 rdata->lld_event_callback(lport, rdata, event);
318 kref_put(&rdata->kref, fc_rport_destroy);
321 case RPORT_EV_FAILED:
324 if (rdata->prli_count) {
325 mutex_lock(&fc_prov_mutex);
326 for (type = 1; type < FC_FC4_PROV_SIZE; type++) {
327 prov = fc_passive_prov[type];
328 if (prov && prov->prlo)
331 mutex_unlock(&fc_prov_mutex);
333 port_id = rdata->ids.port_id;
334 mutex_unlock(&rdata->rp_mutex);
336 if (rport_ops && rport_ops->event_callback) {
337 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
338 rport_ops->event_callback(lport, rdata, event);
340 if (rdata->lld_event_callback) {
341 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
342 rdata->lld_event_callback(lport, rdata, event);
344 if (cancel_delayed_work_sync(&rdata->retry_work))
345 kref_put(&rdata->kref, fc_rport_destroy);
348 * Reset any outstanding exchanges before freeing rport.
350 lport->tt.exch_mgr_reset(lport, 0, port_id);
351 lport->tt.exch_mgr_reset(lport, port_id, 0);
354 rpriv = rport->dd_data;
355 rpriv->rp_state = RPORT_ST_DELETE;
356 mutex_lock(&rdata->rp_mutex);
358 mutex_unlock(&rdata->rp_mutex);
359 fc_remote_port_delete(rport);
362 mutex_lock(&rdata->rp_mutex);
363 if (rdata->rp_state == RPORT_ST_DELETE) {
364 if (port_id == FC_FID_DIR_SERV) {
365 rdata->event = RPORT_EV_NONE;
366 mutex_unlock(&rdata->rp_mutex);
367 kref_put(&rdata->kref, fc_rport_destroy);
368 } else if ((rdata->flags & FC_RP_STARTED) &&
369 rdata->major_retries <
370 lport->max_rport_retry_count) {
371 rdata->major_retries++;
372 rdata->event = RPORT_EV_NONE;
373 FC_RPORT_DBG(rdata, "work restart\n");
374 fc_rport_enter_flogi(rdata);
375 mutex_unlock(&rdata->rp_mutex);
377 mutex_unlock(&rdata->rp_mutex);
378 FC_RPORT_DBG(rdata, "work delete\n");
379 mutex_lock(&lport->disc.disc_mutex);
380 list_del_rcu(&rdata->peers);
381 mutex_unlock(&lport->disc.disc_mutex);
382 kref_put(&rdata->kref, fc_rport_destroy);
386 * Re-open for events. Reissue READY event if ready.
388 rdata->event = RPORT_EV_NONE;
389 if (rdata->rp_state == RPORT_ST_READY) {
390 FC_RPORT_DBG(rdata, "work reopen\n");
391 fc_rport_enter_ready(rdata);
393 mutex_unlock(&rdata->rp_mutex);
398 mutex_unlock(&rdata->rp_mutex);
401 kref_put(&rdata->kref, fc_rport_destroy);
405 * fc_rport_login() - Start the remote port login state machine
406 * @rdata: The remote port to be logged in to
408 * Initiates the RP state machine. It is called from the LP module.
409 * This function will issue the following commands to the N_Port
410 * identified by the FC ID provided.
416 * Locking Note: Called without the rport lock held. This
417 * function will hold the rport lock, call an _enter_*
418 * function and then unlock the rport.
420 * This indicates the intent to be logged into the remote port.
421 * If it appears we are already logged in, ADISC is used to verify
424 int fc_rport_login(struct fc_rport_priv *rdata)
426 mutex_lock(&rdata->rp_mutex);
428 if (rdata->flags & FC_RP_STARTED) {
429 FC_RPORT_DBG(rdata, "port already started\n");
430 mutex_unlock(&rdata->rp_mutex);
434 rdata->flags |= FC_RP_STARTED;
435 switch (rdata->rp_state) {
437 FC_RPORT_DBG(rdata, "ADISC port\n");
438 fc_rport_enter_adisc(rdata);
440 case RPORT_ST_DELETE:
441 FC_RPORT_DBG(rdata, "Restart deleted port\n");
444 FC_RPORT_DBG(rdata, "Login to port\n");
445 fc_rport_enter_flogi(rdata);
448 FC_RPORT_DBG(rdata, "Login in progress, state %s\n",
449 fc_rport_state(rdata));
452 mutex_unlock(&rdata->rp_mutex);
456 EXPORT_SYMBOL(fc_rport_login);
459 * fc_rport_enter_delete() - Schedule a remote port to be deleted
460 * @rdata: The remote port to be deleted
461 * @event: The event to report as the reason for deletion
463 * Allow state change into DELETE only once.
465 * Call queue_work only if there's no event already pending.
466 * Set the new event so that the old pending event will not occur.
467 * Since we have the mutex, even if fc_rport_work() is already started,
468 * it'll see the new event.
470 * Reference counting: does not modify kref
472 static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
473 enum fc_rport_event event)
475 lockdep_assert_held(&rdata->rp_mutex);
477 if (rdata->rp_state == RPORT_ST_DELETE)
480 FC_RPORT_DBG(rdata, "Delete port\n");
482 fc_rport_state_enter(rdata, RPORT_ST_DELETE);
484 kref_get(&rdata->kref);
485 if (rdata->event == RPORT_EV_NONE &&
486 !queue_work(rport_event_queue, &rdata->event_work))
487 kref_put(&rdata->kref, fc_rport_destroy);
489 rdata->event = event;
493 * fc_rport_logoff() - Logoff and remove a remote port
494 * @rdata: The remote port to be logged off of
496 * Locking Note: Called without the rport lock held. This
497 * function will hold the rport lock, call an _enter_*
498 * function and then unlock the rport.
500 int fc_rport_logoff(struct fc_rport_priv *rdata)
502 struct fc_lport *lport = rdata->local_port;
503 u32 port_id = rdata->ids.port_id;
505 mutex_lock(&rdata->rp_mutex);
507 FC_RPORT_DBG(rdata, "Remove port\n");
509 rdata->flags &= ~FC_RP_STARTED;
510 if (rdata->rp_state == RPORT_ST_DELETE) {
511 FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n");
516 * To explicitly Logout, the initiating Nx_Port shall terminate
517 * other open Sequences that it initiated with the destination
518 * Nx_Port prior to performing Logout.
520 lport->tt.exch_mgr_reset(lport, 0, port_id);
521 lport->tt.exch_mgr_reset(lport, port_id, 0);
523 fc_rport_enter_logo(rdata);
526 * Change the state to Delete so that we discard
529 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
531 mutex_unlock(&rdata->rp_mutex);
534 EXPORT_SYMBOL(fc_rport_logoff);
537 * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state
538 * @rdata: The remote port that is ready
540 * Reference counting: schedules workqueue, does not modify kref
542 static void fc_rport_enter_ready(struct fc_rport_priv *rdata)
544 lockdep_assert_held(&rdata->rp_mutex);
546 fc_rport_state_enter(rdata, RPORT_ST_READY);
548 FC_RPORT_DBG(rdata, "Port is Ready\n");
550 kref_get(&rdata->kref);
551 if (rdata->event == RPORT_EV_NONE &&
552 !queue_work(rport_event_queue, &rdata->event_work))
553 kref_put(&rdata->kref, fc_rport_destroy);
555 rdata->event = RPORT_EV_READY;
559 * fc_rport_timeout() - Handler for the retry_work timer
560 * @work: Handle to the remote port that has timed out
562 * Locking Note: Called without the rport lock held. This
563 * function will hold the rport lock, call an _enter_*
564 * function and then unlock the rport.
566 * Reference counting: Drops kref on return.
568 static void fc_rport_timeout(struct work_struct *work)
570 struct fc_rport_priv *rdata =
571 container_of(work, struct fc_rport_priv, retry_work.work);
573 mutex_lock(&rdata->rp_mutex);
574 FC_RPORT_DBG(rdata, "Port timeout, state %s\n", fc_rport_state(rdata));
576 switch (rdata->rp_state) {
578 fc_rport_enter_flogi(rdata);
581 fc_rport_enter_plogi(rdata);
584 fc_rport_enter_prli(rdata);
587 fc_rport_enter_rtv(rdata);
590 fc_rport_enter_adisc(rdata);
592 case RPORT_ST_PLOGI_WAIT:
595 case RPORT_ST_DELETE:
599 mutex_unlock(&rdata->rp_mutex);
600 kref_put(&rdata->kref, fc_rport_destroy);
604 * fc_rport_error() - Error handler, called once retries have been exhausted
605 * @rdata: The remote port the error is happened on
606 * @err: The error code
608 * Reference counting: does not modify kref
610 static void fc_rport_error(struct fc_rport_priv *rdata, int err)
612 struct fc_lport *lport = rdata->local_port;
614 lockdep_assert_held(&rdata->rp_mutex);
616 FC_RPORT_DBG(rdata, "Error %d in state %s, retries %d\n",
617 -err, fc_rport_state(rdata), rdata->retries);
619 switch (rdata->rp_state) {
621 rdata->flags &= ~FC_RP_STARTED;
622 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
625 if (lport->point_to_multipoint) {
626 rdata->flags &= ~FC_RP_STARTED;
627 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
629 fc_rport_enter_logo(rdata);
632 fc_rport_enter_ready(rdata);
636 fc_rport_enter_logo(rdata);
638 case RPORT_ST_PLOGI_WAIT:
639 case RPORT_ST_DELETE:
647 * fc_rport_error_retry() - Handler for remote port state retries
648 * @rdata: The remote port whose state is to be retried
649 * @err: The error code
651 * If the error was an exchange timeout retry immediately,
652 * otherwise wait for E_D_TOV.
654 * Reference counting: increments kref when scheduling retry_work
656 static void fc_rport_error_retry(struct fc_rport_priv *rdata, int err)
658 unsigned long delay = msecs_to_jiffies(rdata->e_d_tov);
660 lockdep_assert_held(&rdata->rp_mutex);
662 /* make sure this isn't an FC_EX_CLOSED error, never retry those */
663 if (err == -FC_EX_CLOSED)
666 if (rdata->retries < rdata->local_port->max_rport_retry_count) {
667 FC_RPORT_DBG(rdata, "Error %d in state %s, retrying\n",
668 err, fc_rport_state(rdata));
670 /* no additional delay on exchange timeouts */
671 if (err == -FC_EX_TIMEOUT)
673 kref_get(&rdata->kref);
674 if (!schedule_delayed_work(&rdata->retry_work, delay))
675 kref_put(&rdata->kref, fc_rport_destroy);
680 fc_rport_error(rdata, err);
684 * fc_rport_login_complete() - Handle parameters and completion of p-mp login.
685 * @rdata: The remote port which we logged into or which logged into us.
686 * @fp: The FLOGI or PLOGI request or response frame
688 * Returns non-zero error if a problem is detected with the frame.
689 * Does not free the frame.
691 * This is only used in point-to-multipoint mode for FIP currently.
693 static int fc_rport_login_complete(struct fc_rport_priv *rdata,
696 struct fc_lport *lport = rdata->local_port;
697 struct fc_els_flogi *flogi;
698 unsigned int e_d_tov;
701 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
705 csp_flags = ntohs(flogi->fl_csp.sp_features);
707 if (fc_frame_payload_op(fp) == ELS_FLOGI) {
708 if (csp_flags & FC_SP_FT_FPORT) {
709 FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n");
715 * E_D_TOV is not valid on an incoming FLOGI request.
717 e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov);
718 if (csp_flags & FC_SP_FT_EDTR)
720 if (e_d_tov > rdata->e_d_tov)
721 rdata->e_d_tov = e_d_tov;
723 rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs);
728 * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode
729 * @sp: The sequence that the FLOGI was on
730 * @fp: The FLOGI response frame
731 * @rp_arg: The remote port that received the FLOGI response
733 static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
736 struct fc_rport_priv *rdata = rp_arg;
737 struct fc_lport *lport = rdata->local_port;
738 struct fc_els_flogi *flogi;
739 unsigned int r_a_tov;
743 FC_RPORT_DBG(rdata, "Received a FLOGI %s\n",
744 IS_ERR(fp) ? "error" : fc_els_resp_type(fp));
746 if (fp == ERR_PTR(-FC_EX_CLOSED))
749 mutex_lock(&rdata->rp_mutex);
751 if (rdata->rp_state != RPORT_ST_FLOGI) {
752 FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state "
753 "%s\n", fc_rport_state(rdata));
760 fc_rport_error(rdata, PTR_ERR(fp));
763 opcode = fc_frame_payload_op(fp);
764 if (opcode == ELS_LS_RJT) {
765 struct fc_els_ls_rjt *rjt;
767 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
768 FC_RPORT_DBG(rdata, "FLOGI ELS rejected, reason %x expl %x\n",
769 rjt->er_reason, rjt->er_explan);
770 err = -FC_EX_ELS_RJT;
772 } else if (opcode != ELS_LS_ACC) {
773 FC_RPORT_DBG(rdata, "FLOGI ELS invalid opcode %x\n", opcode);
774 err = -FC_EX_ELS_RJT;
777 if (fc_rport_login_complete(rdata, fp)) {
778 FC_RPORT_DBG(rdata, "FLOGI failed, no login\n");
779 err = -FC_EX_INV_LOGIN;
783 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
785 err = -FC_EX_ALLOC_ERR;
788 r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov);
789 if (r_a_tov > rdata->r_a_tov)
790 rdata->r_a_tov = r_a_tov;
792 if (rdata->ids.port_name < lport->wwpn)
793 fc_rport_enter_plogi(rdata);
795 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
799 mutex_unlock(&rdata->rp_mutex);
801 kref_put(&rdata->kref, fc_rport_destroy);
804 FC_RPORT_DBG(rdata, "Bad FLOGI response\n");
805 fc_rport_error_retry(rdata, err);
810 * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp
811 * @rdata: The remote port to send a FLOGI to
813 * Reference counting: increments kref when sending ELS
815 static void fc_rport_enter_flogi(struct fc_rport_priv *rdata)
817 struct fc_lport *lport = rdata->local_port;
820 lockdep_assert_held(&rdata->rp_mutex);
822 if (!lport->point_to_multipoint)
823 return fc_rport_enter_plogi(rdata);
825 FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n",
826 fc_rport_state(rdata));
828 fc_rport_state_enter(rdata, RPORT_ST_FLOGI);
830 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
832 return fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
834 kref_get(&rdata->kref);
835 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI,
836 fc_rport_flogi_resp, rdata,
837 2 * lport->r_a_tov)) {
838 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
839 kref_put(&rdata->kref, fc_rport_destroy);
844 * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode
845 * @lport: The local port that received the PLOGI request
846 * @rx_fp: The PLOGI request frame
848 * Reference counting: drops kref on return
850 static void fc_rport_recv_flogi_req(struct fc_lport *lport,
851 struct fc_frame *rx_fp)
853 struct fc_els_flogi *flp;
854 struct fc_rport_priv *rdata;
855 struct fc_frame *fp = rx_fp;
856 struct fc_seq_els_data rjt_data;
859 sid = fc_frame_sid(fp);
861 FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n");
863 if (!lport->point_to_multipoint) {
864 rjt_data.reason = ELS_RJT_UNSUP;
865 rjt_data.explan = ELS_EXPL_NONE;
869 flp = fc_frame_payload_get(fp, sizeof(*flp));
871 rjt_data.reason = ELS_RJT_LOGIC;
872 rjt_data.explan = ELS_EXPL_INV_LEN;
876 rdata = fc_rport_lookup(lport, sid);
878 rjt_data.reason = ELS_RJT_FIP;
879 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
882 mutex_lock(&rdata->rp_mutex);
884 FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n",
885 fc_rport_state(rdata));
887 switch (rdata->rp_state) {
890 * If received the FLOGI request on RPORT which is INIT state
891 * (means not transition to FLOGI either fc_rport timeout
892 * function didn;t trigger or this end hasn;t received
893 * beacon yet from other end. In that case only, allow RPORT
894 * state machine to continue, otherwise fall through which
895 * causes the code to send reject response.
896 * NOTE; Not checking for FIP->state such as VNMP_UP or
897 * VNMP_CLAIM because if FIP state is not one of those,
898 * RPORT wouldn;t have created and 'rport_lookup' would have
899 * failed anyway in that case.
902 case RPORT_ST_DELETE:
903 mutex_unlock(&rdata->rp_mutex);
904 rjt_data.reason = ELS_RJT_FIP;
905 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
908 case RPORT_ST_PLOGI_WAIT:
916 * Set the remote port to be deleted and to then restart.
917 * This queues work to be sure exchanges are reset.
919 fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
920 mutex_unlock(&rdata->rp_mutex);
921 rjt_data.reason = ELS_RJT_BUSY;
922 rjt_data.explan = ELS_EXPL_NONE;
925 if (fc_rport_login_complete(rdata, fp)) {
926 mutex_unlock(&rdata->rp_mutex);
927 rjt_data.reason = ELS_RJT_LOGIC;
928 rjt_data.explan = ELS_EXPL_NONE;
932 fp = fc_frame_alloc(lport, sizeof(*flp));
936 fc_flogi_fill(lport, fp);
937 flp = fc_frame_payload_get(fp, sizeof(*flp));
938 flp->fl_cmd = ELS_LS_ACC;
940 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
941 lport->tt.frame_send(lport, fp);
944 * Do not proceed with the state machine if our
945 * FLOGI has crossed with an FLOGI from the
946 * remote port; wait for the FLOGI response instead.
948 if (rdata->rp_state != RPORT_ST_FLOGI) {
949 if (rdata->ids.port_name < lport->wwpn)
950 fc_rport_enter_plogi(rdata);
952 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
955 mutex_unlock(&rdata->rp_mutex);
956 kref_put(&rdata->kref, fc_rport_destroy);
957 fc_frame_free(rx_fp);
961 kref_put(&rdata->kref, fc_rport_destroy);
963 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
964 fc_frame_free(rx_fp);
968 * fc_rport_plogi_resp() - Handler for ELS PLOGI responses
969 * @sp: The sequence the PLOGI is on
970 * @fp: The PLOGI response frame
971 * @rdata_arg: The remote port that sent the PLOGI response
973 * Locking Note: This function will be called without the rport lock
974 * held, but it will lock, call an _enter_* function or fc_rport_error
975 * and then unlock the rport.
977 static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
980 struct fc_rport_priv *rdata = rdata_arg;
981 struct fc_lport *lport = rdata->local_port;
982 struct fc_els_flogi *plp = NULL;
987 FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp));
989 if (fp == ERR_PTR(-FC_EX_CLOSED))
992 mutex_lock(&rdata->rp_mutex);
994 if (rdata->rp_state != RPORT_ST_PLOGI) {
995 FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state "
996 "%s\n", fc_rport_state(rdata));
1003 fc_rport_error_retry(rdata, PTR_ERR(fp));
1007 op = fc_frame_payload_op(fp);
1008 if (op == ELS_LS_ACC &&
1009 (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) {
1010 rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn);
1011 rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn);
1013 /* save plogi response sp_features for further reference */
1014 rdata->sp_features = ntohs(plp->fl_csp.sp_features);
1016 if (lport->point_to_multipoint)
1017 fc_rport_login_complete(rdata, fp);
1018 csp_seq = ntohs(plp->fl_csp.sp_tot_seq);
1019 cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq);
1020 if (cssp_seq < csp_seq)
1022 rdata->max_seq = csp_seq;
1023 rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs);
1024 fc_rport_enter_prli(rdata);
1026 struct fc_els_ls_rjt *rjt;
1028 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1030 FC_RPORT_DBG(rdata, "PLOGI bad response\n");
1032 FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n",
1033 rjt->er_reason, rjt->er_explan);
1034 fc_rport_error_retry(rdata, -FC_EX_ELS_RJT);
1039 mutex_unlock(&rdata->rp_mutex);
1041 kref_put(&rdata->kref, fc_rport_destroy);
1045 fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata)
1047 if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN)
1049 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) &&
1050 (lport->service_params & FCP_SPPF_INIT_FCN))
1052 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) &&
1053 (lport->service_params & FCP_SPPF_TARG_FCN))
1059 * fc_rport_enter_plogi() - Send Port Login (PLOGI) request
1060 * @rdata: The remote port to send a PLOGI to
1062 * Reference counting: increments kref when sending ELS
1064 static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
1066 struct fc_lport *lport = rdata->local_port;
1067 struct fc_frame *fp;
1069 lockdep_assert_held(&rdata->rp_mutex);
1071 if (!fc_rport_compatible_roles(lport, rdata)) {
1072 FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n");
1073 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
1077 FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
1078 fc_rport_state(rdata));
1080 fc_rport_state_enter(rdata, RPORT_ST_PLOGI);
1082 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
1083 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1085 FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__);
1086 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1089 rdata->e_d_tov = lport->e_d_tov;
1091 kref_get(&rdata->kref);
1092 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI,
1093 fc_rport_plogi_resp, rdata,
1094 2 * lport->r_a_tov)) {
1095 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1096 kref_put(&rdata->kref, fc_rport_destroy);
1101 * fc_rport_prli_resp() - Process Login (PRLI) response handler
1102 * @sp: The sequence the PRLI response was on
1103 * @fp: The PRLI response frame
1104 * @rdata_arg: The remote port that sent the PRLI response
1106 * Locking Note: This function will be called without the rport lock
1107 * held, but it will lock, call an _enter_* function or fc_rport_error
1108 * and then unlock the rport.
1110 static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
1113 struct fc_rport_priv *rdata = rdata_arg;
1115 struct fc_els_prli prli;
1116 struct fc_els_spp spp;
1118 struct fc_els_spp temp_spp;
1119 struct fc_els_ls_rjt *rjt;
1120 struct fc4_prov *prov;
1121 u32 roles = FC_RPORT_ROLE_UNKNOWN;
1124 enum fc_els_spp_resp resp_code;
1126 FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp));
1128 if (fp == ERR_PTR(-FC_EX_CLOSED))
1131 mutex_lock(&rdata->rp_mutex);
1133 if (rdata->rp_state != RPORT_ST_PRLI) {
1134 FC_RPORT_DBG(rdata, "Received a PRLI response, but in state "
1135 "%s\n", fc_rport_state(rdata));
1142 fc_rport_error_retry(rdata, PTR_ERR(fp));
1146 /* reinitialize remote port roles */
1147 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
1149 op = fc_frame_payload_op(fp);
1150 if (op == ELS_LS_ACC) {
1151 pp = fc_frame_payload_get(fp, sizeof(*pp));
1153 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1157 resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
1158 FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n",
1159 pp->spp.spp_flags, pp->spp.spp_type);
1160 rdata->spp_type = pp->spp.spp_type;
1161 if (resp_code != FC_SPP_RESP_ACK) {
1162 if (resp_code == FC_SPP_RESP_CONF)
1163 fc_rport_error(rdata, -FC_EX_SEQ_ERR);
1165 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1168 if (pp->prli.prli_spp_len < sizeof(pp->spp)) {
1169 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1173 fcp_parm = ntohl(pp->spp.spp_params);
1174 if (fcp_parm & FCP_SPPF_RETRY)
1175 rdata->flags |= FC_RP_FLAGS_RETRY;
1176 if (fcp_parm & FCP_SPPF_CONF_COMPL)
1177 rdata->flags |= FC_RP_FLAGS_CONF_REQ;
1180 * Call prli provider if we should act as a target
1182 prov = fc_passive_prov[rdata->spp_type];
1184 memset(&temp_spp, 0, sizeof(temp_spp));
1185 prov->prli(rdata, pp->prli.prli_spp_len,
1186 &pp->spp, &temp_spp);
1189 * Check if the image pair could be established
1191 if (rdata->spp_type != FC_TYPE_FCP ||
1192 !(pp->spp.spp_flags & FC_SPP_EST_IMG_PAIR)) {
1194 * Nope; we can't use this port as a target.
1196 fcp_parm &= ~FCP_SPPF_TARG_FCN;
1198 rdata->supported_classes = FC_COS_CLASS3;
1199 if (fcp_parm & FCP_SPPF_INIT_FCN)
1200 roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1201 if (fcp_parm & FCP_SPPF_TARG_FCN)
1202 roles |= FC_RPORT_ROLE_FCP_TARGET;
1204 rdata->ids.roles = roles;
1205 fc_rport_enter_rtv(rdata);
1208 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1210 FC_RPORT_DBG(rdata, "PRLI bad response\n");
1212 FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
1213 rjt->er_reason, rjt->er_explan);
1214 fc_rport_error_retry(rdata, FC_EX_ELS_RJT);
1220 mutex_unlock(&rdata->rp_mutex);
1222 kref_put(&rdata->kref, fc_rport_destroy);
1226 * fc_rport_enter_prli() - Send Process Login (PRLI) request
1227 * @rdata: The remote port to send the PRLI request to
1229 * Reference counting: increments kref when sending ELS
1231 static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
1233 struct fc_lport *lport = rdata->local_port;
1235 struct fc_els_prli prli;
1236 struct fc_els_spp spp;
1238 struct fc_frame *fp;
1239 struct fc4_prov *prov;
1241 lockdep_assert_held(&rdata->rp_mutex);
1244 * If the rport is one of the well known addresses
1245 * we skip PRLI and RTV and go straight to READY.
1247 if (rdata->ids.port_id >= FC_FID_DOM_MGR) {
1248 fc_rport_enter_ready(rdata);
1253 * And if the local port does not support the initiator function
1254 * there's no need to send a PRLI, either.
1256 if (!(lport->service_params & FCP_SPPF_INIT_FCN)) {
1257 fc_rport_enter_ready(rdata);
1261 FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n",
1262 fc_rport_state(rdata));
1264 fc_rport_state_enter(rdata, RPORT_ST_PRLI);
1266 fp = fc_frame_alloc(lport, sizeof(*pp));
1268 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1272 fc_prli_fill(lport, fp);
1274 prov = fc_passive_prov[FC_TYPE_FCP];
1276 pp = fc_frame_payload_get(fp, sizeof(*pp));
1277 prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp);
1280 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id,
1281 fc_host_port_id(lport->host), FC_TYPE_ELS,
1282 FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
1284 kref_get(&rdata->kref);
1285 if (!fc_exch_seq_send(lport, fp, fc_rport_prli_resp,
1286 NULL, rdata, 2 * lport->r_a_tov)) {
1287 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1288 kref_put(&rdata->kref, fc_rport_destroy);
1293 * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses
1294 * @sp: The sequence the RTV was on
1295 * @fp: The RTV response frame
1296 * @rdata_arg: The remote port that sent the RTV response
1298 * Many targets don't seem to support this.
1300 * Locking Note: This function will be called without the rport lock
1301 * held, but it will lock, call an _enter_* function or fc_rport_error
1302 * and then unlock the rport.
1304 static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
1307 struct fc_rport_priv *rdata = rdata_arg;
1310 FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp));
1312 if (fp == ERR_PTR(-FC_EX_CLOSED))
1315 mutex_lock(&rdata->rp_mutex);
1317 if (rdata->rp_state != RPORT_ST_RTV) {
1318 FC_RPORT_DBG(rdata, "Received a RTV response, but in state "
1319 "%s\n", fc_rport_state(rdata));
1326 fc_rport_error(rdata, PTR_ERR(fp));
1330 op = fc_frame_payload_op(fp);
1331 if (op == ELS_LS_ACC) {
1332 struct fc_els_rtv_acc *rtv;
1336 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1338 toq = ntohl(rtv->rtv_toq);
1339 tov = ntohl(rtv->rtv_r_a_tov);
1342 if (tov > rdata->r_a_tov)
1343 rdata->r_a_tov = tov;
1344 tov = ntohl(rtv->rtv_e_d_tov);
1345 if (toq & FC_ELS_RTV_EDRES)
1349 if (tov > rdata->e_d_tov)
1350 rdata->e_d_tov = tov;
1354 fc_rport_enter_ready(rdata);
1359 mutex_unlock(&rdata->rp_mutex);
1361 kref_put(&rdata->kref, fc_rport_destroy);
1365 * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request
1366 * @rdata: The remote port to send the RTV request to
1368 * Reference counting: increments kref when sending ELS
1370 static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
1372 struct fc_frame *fp;
1373 struct fc_lport *lport = rdata->local_port;
1375 lockdep_assert_held(&rdata->rp_mutex);
1377 FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n",
1378 fc_rport_state(rdata));
1380 fc_rport_state_enter(rdata, RPORT_ST_RTV);
1382 fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
1384 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1388 kref_get(&rdata->kref);
1389 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
1390 fc_rport_rtv_resp, rdata,
1391 2 * lport->r_a_tov)) {
1392 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1393 kref_put(&rdata->kref, fc_rport_destroy);
1398 * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests
1399 * @rdata: The remote port that sent the RTV request
1400 * @in_fp: The RTV request frame
1402 static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata,
1403 struct fc_frame *in_fp)
1405 struct fc_lport *lport = rdata->local_port;
1406 struct fc_frame *fp;
1407 struct fc_els_rtv_acc *rtv;
1408 struct fc_seq_els_data rjt_data;
1410 lockdep_assert_held(&rdata->rp_mutex);
1411 lockdep_assert_held(&lport->lp_mutex);
1413 FC_RPORT_DBG(rdata, "Received RTV request\n");
1415 fp = fc_frame_alloc(lport, sizeof(*rtv));
1417 rjt_data.reason = ELS_RJT_UNAB;
1418 rjt_data.explan = ELS_EXPL_INSUF_RES;
1419 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1422 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1423 rtv->rtv_cmd = ELS_LS_ACC;
1424 rtv->rtv_r_a_tov = htonl(lport->r_a_tov);
1425 rtv->rtv_e_d_tov = htonl(lport->e_d_tov);
1427 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1428 lport->tt.frame_send(lport, fp);
1430 fc_frame_free(in_fp);
1434 * fc_rport_logo_resp() - Handler for logout (LOGO) responses
1435 * @sp: The sequence the LOGO was on
1436 * @fp: The LOGO response frame
1437 * @lport_arg: The local port
1439 static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1442 struct fc_rport_priv *rdata = rdata_arg;
1443 struct fc_lport *lport = rdata->local_port;
1445 FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did,
1446 "Received a LOGO %s\n", fc_els_resp_type(fp));
1449 kref_put(&rdata->kref, fc_rport_destroy);
1453 * fc_rport_enter_logo() - Send a logout (LOGO) request
1454 * @rdata: The remote port to send the LOGO request to
1456 * Reference counting: increments kref when sending ELS
1458 static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
1460 struct fc_lport *lport = rdata->local_port;
1461 struct fc_frame *fp;
1463 lockdep_assert_held(&rdata->rp_mutex);
1465 FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n",
1466 fc_rport_state(rdata));
1468 fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
1471 kref_get(&rdata->kref);
1472 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
1473 fc_rport_logo_resp, rdata, 0))
1474 kref_put(&rdata->kref, fc_rport_destroy);
1478 * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses
1479 * @sp: The sequence the ADISC response was on
1480 * @fp: The ADISC response frame
1481 * @rdata_arg: The remote port that sent the ADISC response
1483 * Locking Note: This function will be called without the rport lock
1484 * held, but it will lock, call an _enter_* function or fc_rport_error
1485 * and then unlock the rport.
1487 static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
1490 struct fc_rport_priv *rdata = rdata_arg;
1491 struct fc_els_adisc *adisc;
1494 FC_RPORT_DBG(rdata, "Received a ADISC response\n");
1496 if (fp == ERR_PTR(-FC_EX_CLOSED))
1499 mutex_lock(&rdata->rp_mutex);
1501 if (rdata->rp_state != RPORT_ST_ADISC) {
1502 FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n",
1503 fc_rport_state(rdata));
1510 fc_rport_error(rdata, PTR_ERR(fp));
1515 * If address verification failed. Consider us logged out of the rport.
1516 * Since the rport is still in discovery, we want to be
1517 * logged in, so go to PLOGI state. Otherwise, go back to READY.
1519 op = fc_frame_payload_op(fp);
1520 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1521 if (op != ELS_LS_ACC || !adisc ||
1522 ntoh24(adisc->adisc_port_id) != rdata->ids.port_id ||
1523 get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
1524 get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
1525 FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
1526 fc_rport_enter_flogi(rdata);
1528 FC_RPORT_DBG(rdata, "ADISC OK\n");
1529 fc_rport_enter_ready(rdata);
1534 mutex_unlock(&rdata->rp_mutex);
1536 kref_put(&rdata->kref, fc_rport_destroy);
1540 * fc_rport_enter_adisc() - Send Address Discover (ADISC) request
1541 * @rdata: The remote port to send the ADISC request to
1543 * Reference counting: increments kref when sending ELS
1545 static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
1547 struct fc_lport *lport = rdata->local_port;
1548 struct fc_frame *fp;
1550 lockdep_assert_held(&rdata->rp_mutex);
1552 FC_RPORT_DBG(rdata, "sending ADISC from %s state\n",
1553 fc_rport_state(rdata));
1555 fc_rport_state_enter(rdata, RPORT_ST_ADISC);
1557 fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc));
1559 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1562 kref_get(&rdata->kref);
1563 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC,
1564 fc_rport_adisc_resp, rdata,
1565 2 * lport->r_a_tov)) {
1566 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1567 kref_put(&rdata->kref, fc_rport_destroy);
1572 * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
1573 * @rdata: The remote port that sent the ADISC request
1574 * @in_fp: The ADISC request frame
1576 static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
1577 struct fc_frame *in_fp)
1579 struct fc_lport *lport = rdata->local_port;
1580 struct fc_frame *fp;
1581 struct fc_els_adisc *adisc;
1582 struct fc_seq_els_data rjt_data;
1584 lockdep_assert_held(&rdata->rp_mutex);
1585 lockdep_assert_held(&lport->lp_mutex);
1587 FC_RPORT_DBG(rdata, "Received ADISC request\n");
1589 adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
1591 rjt_data.reason = ELS_RJT_PROT;
1592 rjt_data.explan = ELS_EXPL_INV_LEN;
1593 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1597 fp = fc_frame_alloc(lport, sizeof(*adisc));
1600 fc_adisc_fill(lport, fp);
1601 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1602 adisc->adisc_cmd = ELS_LS_ACC;
1603 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1604 lport->tt.frame_send(lport, fp);
1606 fc_frame_free(in_fp);
1610 * fc_rport_recv_rls_req() - Handle received Read Link Status request
1611 * @rdata: The remote port that sent the RLS request
1612 * @rx_fp: The PRLI request frame
1614 static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
1615 struct fc_frame *rx_fp)
1618 struct fc_lport *lport = rdata->local_port;
1619 struct fc_frame *fp;
1620 struct fc_els_rls *rls;
1621 struct fc_els_rls_resp *rsp;
1622 struct fc_els_lesb *lesb;
1623 struct fc_seq_els_data rjt_data;
1624 struct fc_host_statistics *hst;
1626 lockdep_assert_held(&rdata->rp_mutex);
1628 FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
1629 fc_rport_state(rdata));
1631 rls = fc_frame_payload_get(rx_fp, sizeof(*rls));
1633 rjt_data.reason = ELS_RJT_PROT;
1634 rjt_data.explan = ELS_EXPL_INV_LEN;
1638 fp = fc_frame_alloc(lport, sizeof(*rsp));
1640 rjt_data.reason = ELS_RJT_UNAB;
1641 rjt_data.explan = ELS_EXPL_INSUF_RES;
1645 rsp = fc_frame_payload_get(fp, sizeof(*rsp));
1646 memset(rsp, 0, sizeof(*rsp));
1647 rsp->rls_cmd = ELS_LS_ACC;
1648 lesb = &rsp->rls_lesb;
1649 if (lport->tt.get_lesb) {
1650 /* get LESB from LLD if it supports it */
1651 lport->tt.get_lesb(lport, lesb);
1653 fc_get_host_stats(lport->host);
1654 hst = &lport->host_stats;
1655 lesb->lesb_link_fail = htonl(hst->link_failure_count);
1656 lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count);
1657 lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count);
1658 lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count);
1659 lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count);
1660 lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
1663 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1664 lport->tt.frame_send(lport, fp);
1668 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
1670 fc_frame_free(rx_fp);
1674 * fc_rport_recv_els_req() - Handler for validated ELS requests
1675 * @lport: The local port that received the ELS request
1676 * @fp: The ELS request frame
1678 * Handle incoming ELS requests that require port login.
1679 * The ELS opcode has already been validated by the caller.
1681 * Reference counting: does not modify kref
1683 static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
1685 struct fc_rport_priv *rdata;
1686 struct fc_seq_els_data els_data;
1688 lockdep_assert_held(&lport->lp_mutex);
1690 rdata = fc_rport_lookup(lport, fc_frame_sid(fp));
1692 FC_RPORT_ID_DBG(lport, fc_frame_sid(fp),
1693 "Received ELS 0x%02x from non-logged-in port\n",
1694 fc_frame_payload_op(fp));
1698 mutex_lock(&rdata->rp_mutex);
1700 switch (rdata->rp_state) {
1703 case RPORT_ST_READY:
1704 case RPORT_ST_ADISC:
1706 case RPORT_ST_PLOGI:
1707 if (fc_frame_payload_op(fp) == ELS_PRLI) {
1708 FC_RPORT_DBG(rdata, "Reject ELS PRLI "
1709 "while in state %s\n",
1710 fc_rport_state(rdata));
1711 mutex_unlock(&rdata->rp_mutex);
1712 kref_put(&rdata->kref, fc_rport_destroy);
1718 "Reject ELS 0x%02x while in state %s\n",
1719 fc_frame_payload_op(fp), fc_rport_state(rdata));
1720 mutex_unlock(&rdata->rp_mutex);
1721 kref_put(&rdata->kref, fc_rport_destroy);
1725 switch (fc_frame_payload_op(fp)) {
1727 fc_rport_recv_prli_req(rdata, fp);
1730 fc_rport_recv_prlo_req(rdata, fp);
1733 fc_rport_recv_adisc_req(rdata, fp);
1736 fc_seq_els_rsp_send(fp, ELS_RRQ, NULL);
1740 fc_seq_els_rsp_send(fp, ELS_REC, NULL);
1744 fc_rport_recv_rls_req(rdata, fp);
1747 fc_rport_recv_rtv_req(rdata, fp);
1750 fc_frame_free(fp); /* can't happen */
1754 mutex_unlock(&rdata->rp_mutex);
1755 kref_put(&rdata->kref, fc_rport_destroy);
1759 els_data.reason = ELS_RJT_UNAB;
1760 els_data.explan = ELS_EXPL_PLOGI_REQD;
1761 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1766 els_data.reason = ELS_RJT_BUSY;
1767 els_data.explan = ELS_EXPL_NONE;
1768 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1774 * fc_rport_recv_req() - Handler for requests
1775 * @lport: The local port that received the request
1776 * @fp: The request frame
1778 * Reference counting: does not modify kref
1780 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
1782 struct fc_seq_els_data els_data;
1784 lockdep_assert_held(&lport->lp_mutex);
1787 * Handle FLOGI, PLOGI and LOGO requests separately, since they
1788 * don't require prior login.
1789 * Check for unsupported opcodes first and reject them.
1790 * For some ops, it would be incorrect to reject with "PLOGI required".
1792 switch (fc_frame_payload_op(fp)) {
1794 fc_rport_recv_flogi_req(lport, fp);
1797 fc_rport_recv_plogi_req(lport, fp);
1800 fc_rport_recv_logo_req(lport, fp);
1809 fc_rport_recv_els_req(lport, fp);
1812 els_data.reason = ELS_RJT_UNSUP;
1813 els_data.explan = ELS_EXPL_NONE;
1814 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1819 EXPORT_SYMBOL(fc_rport_recv_req);
1822 * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
1823 * @lport: The local port that received the PLOGI request
1824 * @rx_fp: The PLOGI request frame
1826 * Reference counting: increments kref on return
1828 static void fc_rport_recv_plogi_req(struct fc_lport *lport,
1829 struct fc_frame *rx_fp)
1831 struct fc_disc *disc;
1832 struct fc_rport_priv *rdata;
1833 struct fc_frame *fp = rx_fp;
1834 struct fc_els_flogi *pl;
1835 struct fc_seq_els_data rjt_data;
1838 lockdep_assert_held(&lport->lp_mutex);
1840 sid = fc_frame_sid(fp);
1842 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
1844 pl = fc_frame_payload_get(fp, sizeof(*pl));
1846 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n");
1847 rjt_data.reason = ELS_RJT_PROT;
1848 rjt_data.explan = ELS_EXPL_INV_LEN;
1852 disc = &lport->disc;
1853 mutex_lock(&disc->disc_mutex);
1854 rdata = fc_rport_create(lport, sid);
1856 mutex_unlock(&disc->disc_mutex);
1857 rjt_data.reason = ELS_RJT_UNAB;
1858 rjt_data.explan = ELS_EXPL_INSUF_RES;
1862 mutex_lock(&rdata->rp_mutex);
1863 mutex_unlock(&disc->disc_mutex);
1865 rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn);
1866 rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn);
1869 * If the rport was just created, possibly due to the incoming PLOGI,
1870 * set the state appropriately and accept the PLOGI.
1872 * If we had also sent a PLOGI, and if the received PLOGI is from a
1873 * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason
1874 * "command already in progress".
1876 * XXX TBD: If the session was ready before, the PLOGI should result in
1877 * all outstanding exchanges being reset.
1879 switch (rdata->rp_state) {
1881 FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
1883 case RPORT_ST_PLOGI_WAIT:
1884 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n");
1886 case RPORT_ST_PLOGI:
1887 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
1888 if (rdata->ids.port_name < lport->wwpn) {
1889 mutex_unlock(&rdata->rp_mutex);
1890 rjt_data.reason = ELS_RJT_INPROG;
1891 rjt_data.explan = ELS_EXPL_NONE;
1897 case RPORT_ST_READY:
1898 case RPORT_ST_ADISC:
1899 FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d "
1900 "- ignored for now\n", rdata->rp_state);
1901 /* XXX TBD - should reset */
1903 case RPORT_ST_FLOGI:
1904 case RPORT_ST_DELETE:
1905 FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n",
1906 fc_rport_state(rdata));
1907 mutex_unlock(&rdata->rp_mutex);
1908 rjt_data.reason = ELS_RJT_BUSY;
1909 rjt_data.explan = ELS_EXPL_NONE;
1912 if (!fc_rport_compatible_roles(lport, rdata)) {
1913 FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n");
1914 mutex_unlock(&rdata->rp_mutex);
1915 rjt_data.reason = ELS_RJT_LOGIC;
1916 rjt_data.explan = ELS_EXPL_NONE;
1921 * Get session payload size from incoming PLOGI.
1923 rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
1926 * Send LS_ACC. If this fails, the originator should retry.
1928 fp = fc_frame_alloc(lport, sizeof(*pl));
1932 fc_plogi_fill(lport, fp, ELS_LS_ACC);
1933 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1934 lport->tt.frame_send(lport, fp);
1935 fc_rport_enter_prli(rdata);
1937 mutex_unlock(&rdata->rp_mutex);
1938 fc_frame_free(rx_fp);
1942 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
1947 * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
1948 * @rdata: The remote port that sent the PRLI request
1949 * @rx_fp: The PRLI request frame
1951 static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
1952 struct fc_frame *rx_fp)
1954 struct fc_lport *lport = rdata->local_port;
1955 struct fc_frame *fp;
1957 struct fc_els_prli prli;
1958 struct fc_els_spp spp;
1960 struct fc_els_spp *rspp; /* request service param page */
1961 struct fc_els_spp *spp; /* response spp */
1964 enum fc_els_spp_resp resp;
1965 struct fc_seq_els_data rjt_data;
1966 struct fc4_prov *prov;
1968 lockdep_assert_held(&rdata->rp_mutex);
1970 FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
1971 fc_rport_state(rdata));
1973 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
1974 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
1977 plen = ntohs(pp->prli.prli_len);
1978 if ((plen % 4) != 0 || plen > len || plen < 16)
1982 plen = pp->prli.prli_spp_len;
1983 if ((plen % 4) != 0 || plen < sizeof(*spp) ||
1984 plen > len || len < sizeof(*pp) || plen < 12)
1988 fp = fc_frame_alloc(lport, len);
1990 rjt_data.reason = ELS_RJT_UNAB;
1991 rjt_data.explan = ELS_EXPL_INSUF_RES;
1994 pp = fc_frame_payload_get(fp, len);
1997 pp->prli.prli_cmd = ELS_LS_ACC;
1998 pp->prli.prli_spp_len = plen;
1999 pp->prli.prli_len = htons(len);
2000 len -= sizeof(struct fc_els_prli);
2003 * Go through all the service parameter pages and build
2004 * response. If plen indicates longer SPP than standard,
2005 * use that. The entire response has been pre-cleared above.
2008 mutex_lock(&fc_prov_mutex);
2009 while (len >= plen) {
2010 rdata->spp_type = rspp->spp_type;
2011 spp->spp_type = rspp->spp_type;
2012 spp->spp_type_ext = rspp->spp_type_ext;
2015 if (rspp->spp_type < FC_FC4_PROV_SIZE) {
2016 enum fc_els_spp_resp active = 0, passive = 0;
2018 prov = fc_active_prov[rspp->spp_type];
2020 active = prov->prli(rdata, plen, rspp, spp);
2021 prov = fc_passive_prov[rspp->spp_type];
2023 passive = prov->prli(rdata, plen, rspp, spp);
2024 if (!active || passive == FC_SPP_RESP_ACK)
2028 FC_RPORT_DBG(rdata, "PRLI rspp type %x "
2029 "active %x passive %x\n",
2030 rspp->spp_type, active, passive);
2033 if (spp->spp_flags & FC_SPP_EST_IMG_PAIR)
2034 resp |= FC_SPP_RESP_CONF;
2036 resp |= FC_SPP_RESP_INVL;
2038 spp->spp_flags |= resp;
2040 rspp = (struct fc_els_spp *)((char *)rspp + plen);
2041 spp = (struct fc_els_spp *)((char *)spp + plen);
2043 mutex_unlock(&fc_prov_mutex);
2046 * Send LS_ACC. If this fails, the originator should retry.
2048 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2049 lport->tt.frame_send(lport, fp);
2054 rjt_data.reason = ELS_RJT_PROT;
2055 rjt_data.explan = ELS_EXPL_INV_LEN;
2057 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2059 fc_frame_free(rx_fp);
2063 * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
2064 * @rdata: The remote port that sent the PRLO request
2065 * @rx_fp: The PRLO request frame
2067 static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
2068 struct fc_frame *rx_fp)
2070 struct fc_lport *lport = rdata->local_port;
2071 struct fc_frame *fp;
2073 struct fc_els_prlo prlo;
2074 struct fc_els_spp spp;
2076 struct fc_els_spp *rspp; /* request service param page */
2077 struct fc_els_spp *spp; /* response spp */
2080 struct fc_seq_els_data rjt_data;
2082 lockdep_assert_held(&rdata->rp_mutex);
2084 FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
2085 fc_rport_state(rdata));
2087 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
2088 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
2091 plen = ntohs(pp->prlo.prlo_len);
2099 fp = fc_frame_alloc(lport, len);
2101 rjt_data.reason = ELS_RJT_UNAB;
2102 rjt_data.explan = ELS_EXPL_INSUF_RES;
2106 pp = fc_frame_payload_get(fp, len);
2109 pp->prlo.prlo_cmd = ELS_LS_ACC;
2110 pp->prlo.prlo_obs = 0x10;
2111 pp->prlo.prlo_len = htons(len);
2113 spp->spp_type = rspp->spp_type;
2114 spp->spp_type_ext = rspp->spp_type_ext;
2115 spp->spp_flags = FC_SPP_RESP_ACK;
2117 fc_rport_enter_prli(rdata);
2119 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2120 lport->tt.frame_send(lport, fp);
2124 rjt_data.reason = ELS_RJT_PROT;
2125 rjt_data.explan = ELS_EXPL_INV_LEN;
2127 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2129 fc_frame_free(rx_fp);
2133 * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
2134 * @lport: The local port that received the LOGO request
2135 * @fp: The LOGO request frame
2137 * Reference counting: drops kref on return
2139 static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
2141 struct fc_rport_priv *rdata;
2144 lockdep_assert_held(&lport->lp_mutex);
2146 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
2148 sid = fc_frame_sid(fp);
2150 rdata = fc_rport_lookup(lport, sid);
2152 mutex_lock(&rdata->rp_mutex);
2153 FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
2154 fc_rport_state(rdata));
2156 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
2157 mutex_unlock(&rdata->rp_mutex);
2158 kref_put(&rdata->kref, fc_rport_destroy);
2160 FC_RPORT_ID_DBG(lport, sid,
2161 "Received LOGO from non-logged-in port\n");
2166 * fc_rport_flush_queue() - Flush the rport_event_queue
2168 void fc_rport_flush_queue(void)
2170 flush_workqueue(rport_event_queue);
2172 EXPORT_SYMBOL(fc_rport_flush_queue);
2175 * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator.
2176 * @rdata: remote port private
2177 * @spp_len: service parameter page length
2178 * @rspp: received service parameter page
2179 * @spp: response service parameter page
2181 * Returns the value for the response code to be placed in spp_flags;
2182 * Returns 0 if not an initiator.
2184 static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len,
2185 const struct fc_els_spp *rspp,
2186 struct fc_els_spp *spp)
2188 struct fc_lport *lport = rdata->local_port;
2191 fcp_parm = ntohl(rspp->spp_params);
2192 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
2193 if (fcp_parm & FCP_SPPF_INIT_FCN)
2194 rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
2195 if (fcp_parm & FCP_SPPF_TARG_FCN)
2196 rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
2197 if (fcp_parm & FCP_SPPF_RETRY)
2198 rdata->flags |= FC_RP_FLAGS_RETRY;
2199 rdata->supported_classes = FC_COS_CLASS3;
2201 if (!(lport->service_params & FCP_SPPF_INIT_FCN))
2204 spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
2207 * OR in our service parameters with other providers (target), if any.
2209 fcp_parm = ntohl(spp->spp_params);
2210 spp->spp_params = htonl(fcp_parm | lport->service_params);
2211 return FC_SPP_RESP_ACK;
2215 * FC-4 provider ops for FCP initiator.
2217 struct fc4_prov fc_rport_fcp_init = {
2218 .prli = fc_rport_fcp_prli,
2222 * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0
2223 * @rdata: remote port private
2224 * @spp_len: service parameter page length
2225 * @rspp: received service parameter page
2226 * @spp: response service parameter page
2228 static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len,
2229 const struct fc_els_spp *rspp,
2230 struct fc_els_spp *spp)
2232 if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR)
2233 return FC_SPP_RESP_INVL;
2234 return FC_SPP_RESP_ACK;
2238 * FC-4 provider ops for type 0 service parameters.
2240 * This handles the special case of type 0 which is always successful
2241 * but doesn't do anything otherwise.
2243 struct fc4_prov fc_rport_t0_prov = {
2244 .prli = fc_rport_t0_prli,
2248 * fc_setup_rport() - Initialize the rport_event_queue
2250 int fc_setup_rport(void)
2252 rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
2253 if (!rport_event_queue)
2259 * fc_destroy_rport() - Destroy the rport_event_queue
2261 void fc_destroy_rport(void)
2263 destroy_workqueue(rport_event_queue);
2267 * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port
2268 * @rport: The remote port whose I/O should be terminated
2270 void fc_rport_terminate_io(struct fc_rport *rport)
2272 struct fc_rport_libfc_priv *rpriv = rport->dd_data;
2273 struct fc_lport *lport = rpriv->local_port;
2275 lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
2276 lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
2278 EXPORT_SYMBOL(fc_rport_terminate_io);