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 struct fc_rport_priv *fc_rport_create(struct fc_lport *lport, u32 port_id)
142 struct fc_rport_priv *rdata;
144 lockdep_assert_held(&lport->disc.disc_mutex);
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 WARN_ON(!list_empty(&rdata->peers));
188 kfree_rcu(rdata, rcu);
190 EXPORT_SYMBOL(fc_rport_destroy);
193 * fc_rport_state() - Return a string identifying the remote port's state
194 * @rdata: The remote port
196 static const char *fc_rport_state(struct fc_rport_priv *rdata)
200 cp = fc_rport_state_names[rdata->rp_state];
207 * fc_set_rport_loss_tmo() - Set the remote port loss timeout
208 * @rport: The remote port that gets a new timeout value
209 * @timeout: The new timeout value (in seconds)
211 void fc_set_rport_loss_tmo(struct fc_rport *rport, u32 timeout)
214 rport->dev_loss_tmo = timeout;
216 rport->dev_loss_tmo = 1;
218 EXPORT_SYMBOL(fc_set_rport_loss_tmo);
221 * fc_plogi_get_maxframe() - Get the maximum payload from the common service
222 * parameters in a FLOGI frame
223 * @flp: The FLOGI or PLOGI payload
224 * @maxval: The maximum frame size upper limit; this may be less than what
225 * is in the service parameters
227 static unsigned int fc_plogi_get_maxframe(struct fc_els_flogi *flp,
233 * Get max payload from the common service parameters and the
234 * class 3 receive data field size.
236 mfs = ntohs(flp->fl_csp.sp_bb_data) & FC_SP_BB_DATA_MASK;
237 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
239 mfs = ntohs(flp->fl_cssp[3 - 1].cp_rdfs);
240 if (mfs >= FC_SP_MIN_MAX_PAYLOAD && mfs < maxval)
246 * fc_rport_state_enter() - Change the state of a remote port
247 * @rdata: The remote port whose state should change
248 * @new: The new state
250 static void fc_rport_state_enter(struct fc_rport_priv *rdata,
251 enum fc_rport_state new)
253 lockdep_assert_held(&rdata->rp_mutex);
255 if (rdata->rp_state != new)
257 rdata->rp_state = new;
261 * fc_rport_work() - Handler for remote port events in the rport_event_queue
262 * @work: Handle to the remote port being dequeued
264 * Reference counting: drops kref on return
266 static void fc_rport_work(struct work_struct *work)
269 struct fc_rport_priv *rdata =
270 container_of(work, struct fc_rport_priv, event_work);
271 struct fc_rport_libfc_priv *rpriv;
272 enum fc_rport_event event;
273 struct fc_lport *lport = rdata->local_port;
274 struct fc_rport_operations *rport_ops;
275 struct fc_rport_identifiers ids;
276 struct fc_rport *rport;
277 struct fc4_prov *prov;
280 mutex_lock(&rdata->rp_mutex);
281 event = rdata->event;
282 rport_ops = rdata->ops;
283 rport = rdata->rport;
285 FC_RPORT_DBG(rdata, "work event %u\n", event);
290 rdata->event = RPORT_EV_NONE;
291 rdata->major_retries = 0;
292 kref_get(&rdata->kref);
293 mutex_unlock(&rdata->rp_mutex);
296 FC_RPORT_DBG(rdata, "No rport!\n");
297 rport = fc_remote_port_add(lport->host, 0, &ids);
300 FC_RPORT_DBG(rdata, "Failed to add the rport\n");
301 fc_rport_logoff(rdata);
302 kref_put(&rdata->kref, fc_rport_destroy);
305 mutex_lock(&rdata->rp_mutex);
307 FC_RPORT_DBG(rdata, "rport already allocated\n");
308 rdata->rport = rport;
309 rport->maxframe_size = rdata->maxframe_size;
310 rport->supported_classes = rdata->supported_classes;
312 rpriv = rport->dd_data;
313 rpriv->local_port = lport;
314 rpriv->rp_state = rdata->rp_state;
315 rpriv->flags = rdata->flags;
316 rpriv->e_d_tov = rdata->e_d_tov;
317 rpriv->r_a_tov = rdata->r_a_tov;
318 mutex_unlock(&rdata->rp_mutex);
320 if (rport_ops && rport_ops->event_callback) {
321 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
322 rport_ops->event_callback(lport, rdata, event);
324 if (rdata->lld_event_callback) {
325 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
326 rdata->lld_event_callback(lport, rdata, event);
328 kref_put(&rdata->kref, fc_rport_destroy);
331 case RPORT_EV_FAILED:
334 if (rdata->prli_count) {
335 mutex_lock(&fc_prov_mutex);
336 for (type = 1; type < FC_FC4_PROV_SIZE; type++) {
337 prov = fc_passive_prov[type];
338 if (prov && prov->prlo)
341 mutex_unlock(&fc_prov_mutex);
343 port_id = rdata->ids.port_id;
344 mutex_unlock(&rdata->rp_mutex);
346 if (rport_ops && rport_ops->event_callback) {
347 FC_RPORT_DBG(rdata, "callback ev %d\n", event);
348 rport_ops->event_callback(lport, rdata, event);
350 if (rdata->lld_event_callback) {
351 FC_RPORT_DBG(rdata, "lld callback ev %d\n", event);
352 rdata->lld_event_callback(lport, rdata, event);
354 if (cancel_delayed_work_sync(&rdata->retry_work))
355 kref_put(&rdata->kref, fc_rport_destroy);
358 * Reset any outstanding exchanges before freeing rport.
360 lport->tt.exch_mgr_reset(lport, 0, port_id);
361 lport->tt.exch_mgr_reset(lport, port_id, 0);
364 rpriv = rport->dd_data;
365 rpriv->rp_state = RPORT_ST_DELETE;
366 mutex_lock(&rdata->rp_mutex);
368 mutex_unlock(&rdata->rp_mutex);
369 fc_remote_port_delete(rport);
372 mutex_lock(&rdata->rp_mutex);
373 if (rdata->rp_state == RPORT_ST_DELETE) {
374 if (port_id == FC_FID_DIR_SERV) {
375 rdata->event = RPORT_EV_NONE;
376 mutex_unlock(&rdata->rp_mutex);
377 kref_put(&rdata->kref, fc_rport_destroy);
378 } else if ((rdata->flags & FC_RP_STARTED) &&
379 rdata->major_retries <
380 lport->max_rport_retry_count) {
381 rdata->major_retries++;
382 rdata->event = RPORT_EV_NONE;
383 FC_RPORT_DBG(rdata, "work restart\n");
384 fc_rport_enter_flogi(rdata);
385 mutex_unlock(&rdata->rp_mutex);
387 mutex_unlock(&rdata->rp_mutex);
388 FC_RPORT_DBG(rdata, "work delete\n");
389 mutex_lock(&lport->disc.disc_mutex);
390 list_del_rcu(&rdata->peers);
391 mutex_unlock(&lport->disc.disc_mutex);
392 kref_put(&rdata->kref, fc_rport_destroy);
396 * Re-open for events. Reissue READY event if ready.
398 rdata->event = RPORT_EV_NONE;
399 if (rdata->rp_state == RPORT_ST_READY) {
400 FC_RPORT_DBG(rdata, "work reopen\n");
401 fc_rport_enter_ready(rdata);
403 mutex_unlock(&rdata->rp_mutex);
408 mutex_unlock(&rdata->rp_mutex);
411 kref_put(&rdata->kref, fc_rport_destroy);
415 * fc_rport_login() - Start the remote port login state machine
416 * @rdata: The remote port to be logged in to
418 * Initiates the RP state machine. It is called from the LP module.
419 * This function will issue the following commands to the N_Port
420 * identified by the FC ID provided.
426 * Locking Note: Called without the rport lock held. This
427 * function will hold the rport lock, call an _enter_*
428 * function and then unlock the rport.
430 * This indicates the intent to be logged into the remote port.
431 * If it appears we are already logged in, ADISC is used to verify
434 int fc_rport_login(struct fc_rport_priv *rdata)
436 mutex_lock(&rdata->rp_mutex);
438 if (rdata->flags & FC_RP_STARTED) {
439 FC_RPORT_DBG(rdata, "port already started\n");
440 mutex_unlock(&rdata->rp_mutex);
444 rdata->flags |= FC_RP_STARTED;
445 switch (rdata->rp_state) {
447 FC_RPORT_DBG(rdata, "ADISC port\n");
448 fc_rport_enter_adisc(rdata);
450 case RPORT_ST_DELETE:
451 FC_RPORT_DBG(rdata, "Restart deleted port\n");
454 FC_RPORT_DBG(rdata, "Login to port\n");
455 fc_rport_enter_flogi(rdata);
458 FC_RPORT_DBG(rdata, "Login in progress, state %s\n",
459 fc_rport_state(rdata));
462 mutex_unlock(&rdata->rp_mutex);
466 EXPORT_SYMBOL(fc_rport_login);
469 * fc_rport_enter_delete() - Schedule a remote port to be deleted
470 * @rdata: The remote port to be deleted
471 * @event: The event to report as the reason for deletion
473 * Allow state change into DELETE only once.
475 * Call queue_work only if there's no event already pending.
476 * Set the new event so that the old pending event will not occur.
477 * Since we have the mutex, even if fc_rport_work() is already started,
478 * it'll see the new event.
480 * Reference counting: does not modify kref
482 static void fc_rport_enter_delete(struct fc_rport_priv *rdata,
483 enum fc_rport_event event)
485 lockdep_assert_held(&rdata->rp_mutex);
487 if (rdata->rp_state == RPORT_ST_DELETE)
490 FC_RPORT_DBG(rdata, "Delete port\n");
492 fc_rport_state_enter(rdata, RPORT_ST_DELETE);
494 kref_get(&rdata->kref);
495 if (rdata->event == RPORT_EV_NONE &&
496 !queue_work(rport_event_queue, &rdata->event_work))
497 kref_put(&rdata->kref, fc_rport_destroy);
499 rdata->event = event;
503 * fc_rport_logoff() - Logoff and remove a remote port
504 * @rdata: The remote port to be logged off of
506 * Locking Note: Called without the rport lock held. This
507 * function will hold the rport lock, call an _enter_*
508 * function and then unlock the rport.
510 int fc_rport_logoff(struct fc_rport_priv *rdata)
512 struct fc_lport *lport = rdata->local_port;
513 u32 port_id = rdata->ids.port_id;
515 mutex_lock(&rdata->rp_mutex);
517 FC_RPORT_DBG(rdata, "Remove port\n");
519 rdata->flags &= ~FC_RP_STARTED;
520 if (rdata->rp_state == RPORT_ST_DELETE) {
521 FC_RPORT_DBG(rdata, "Port in Delete state, not removing\n");
526 * To explicitly Logout, the initiating Nx_Port shall terminate
527 * other open Sequences that it initiated with the destination
528 * Nx_Port prior to performing Logout.
530 lport->tt.exch_mgr_reset(lport, 0, port_id);
531 lport->tt.exch_mgr_reset(lport, port_id, 0);
533 fc_rport_enter_logo(rdata);
536 * Change the state to Delete so that we discard
539 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
541 mutex_unlock(&rdata->rp_mutex);
544 EXPORT_SYMBOL(fc_rport_logoff);
547 * fc_rport_enter_ready() - Transition to the RPORT_ST_READY state
548 * @rdata: The remote port that is ready
550 * Reference counting: schedules workqueue, does not modify kref
552 static void fc_rport_enter_ready(struct fc_rport_priv *rdata)
554 lockdep_assert_held(&rdata->rp_mutex);
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 * Reference counting: does not modify kref
620 static void fc_rport_error(struct fc_rport_priv *rdata, int err)
622 struct fc_lport *lport = rdata->local_port;
624 lockdep_assert_held(&rdata->rp_mutex);
626 FC_RPORT_DBG(rdata, "Error %d in state %s, retries %d\n",
627 -err, fc_rport_state(rdata), rdata->retries);
629 switch (rdata->rp_state) {
631 rdata->flags &= ~FC_RP_STARTED;
632 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
635 if (lport->point_to_multipoint) {
636 rdata->flags &= ~FC_RP_STARTED;
637 fc_rport_enter_delete(rdata, RPORT_EV_FAILED);
639 fc_rport_enter_logo(rdata);
642 fc_rport_enter_ready(rdata);
646 fc_rport_enter_logo(rdata);
648 case RPORT_ST_PLOGI_WAIT:
649 case RPORT_ST_DELETE:
657 * fc_rport_error_retry() - Handler for remote port state retries
658 * @rdata: The remote port whose state is to be retried
659 * @err: The error code
661 * If the error was an exchange timeout retry immediately,
662 * otherwise wait for E_D_TOV.
664 * Reference counting: increments kref when scheduling retry_work
666 static void fc_rport_error_retry(struct fc_rport_priv *rdata, int err)
668 unsigned long delay = msecs_to_jiffies(rdata->e_d_tov);
670 lockdep_assert_held(&rdata->rp_mutex);
672 /* make sure this isn't an FC_EX_CLOSED error, never retry those */
673 if (err == -FC_EX_CLOSED)
676 if (rdata->retries < rdata->local_port->max_rport_retry_count) {
677 FC_RPORT_DBG(rdata, "Error %d in state %s, retrying\n",
678 err, fc_rport_state(rdata));
680 /* no additional delay on exchange timeouts */
681 if (err == -FC_EX_TIMEOUT)
683 kref_get(&rdata->kref);
684 if (!schedule_delayed_work(&rdata->retry_work, delay))
685 kref_put(&rdata->kref, fc_rport_destroy);
690 fc_rport_error(rdata, err);
694 * fc_rport_login_complete() - Handle parameters and completion of p-mp login.
695 * @rdata: The remote port which we logged into or which logged into us.
696 * @fp: The FLOGI or PLOGI request or response frame
698 * Returns non-zero error if a problem is detected with the frame.
699 * Does not free the frame.
701 * This is only used in point-to-multipoint mode for FIP currently.
703 static int fc_rport_login_complete(struct fc_rport_priv *rdata,
706 struct fc_lport *lport = rdata->local_port;
707 struct fc_els_flogi *flogi;
708 unsigned int e_d_tov;
711 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
715 csp_flags = ntohs(flogi->fl_csp.sp_features);
717 if (fc_frame_payload_op(fp) == ELS_FLOGI) {
718 if (csp_flags & FC_SP_FT_FPORT) {
719 FC_RPORT_DBG(rdata, "Fabric bit set in FLOGI\n");
725 * E_D_TOV is not valid on an incoming FLOGI request.
727 e_d_tov = ntohl(flogi->fl_csp.sp_e_d_tov);
728 if (csp_flags & FC_SP_FT_EDTR)
730 if (e_d_tov > rdata->e_d_tov)
731 rdata->e_d_tov = e_d_tov;
733 rdata->maxframe_size = fc_plogi_get_maxframe(flogi, lport->mfs);
738 * fc_rport_flogi_resp() - Handle response to FLOGI request for p-mp mode
739 * @sp: The sequence that the FLOGI was on
740 * @fp: The FLOGI response frame
741 * @rp_arg: The remote port that received the FLOGI response
743 static void fc_rport_flogi_resp(struct fc_seq *sp, struct fc_frame *fp,
746 struct fc_rport_priv *rdata = rp_arg;
747 struct fc_lport *lport = rdata->local_port;
748 struct fc_els_flogi *flogi;
749 unsigned int r_a_tov;
753 FC_RPORT_DBG(rdata, "Received a FLOGI %s\n",
754 IS_ERR(fp) ? "error" : fc_els_resp_type(fp));
756 if (fp == ERR_PTR(-FC_EX_CLOSED))
759 mutex_lock(&rdata->rp_mutex);
761 if (rdata->rp_state != RPORT_ST_FLOGI) {
762 FC_RPORT_DBG(rdata, "Received a FLOGI response, but in state "
763 "%s\n", fc_rport_state(rdata));
770 fc_rport_error(rdata, PTR_ERR(fp));
773 opcode = fc_frame_payload_op(fp);
774 if (opcode == ELS_LS_RJT) {
775 struct fc_els_ls_rjt *rjt;
777 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
778 FC_RPORT_DBG(rdata, "FLOGI ELS rejected, reason %x expl %x\n",
779 rjt->er_reason, rjt->er_explan);
780 err = -FC_EX_ELS_RJT;
782 } else if (opcode != ELS_LS_ACC) {
783 FC_RPORT_DBG(rdata, "FLOGI ELS invalid opcode %x\n", opcode);
784 err = -FC_EX_ELS_RJT;
787 if (fc_rport_login_complete(rdata, fp)) {
788 FC_RPORT_DBG(rdata, "FLOGI failed, no login\n");
789 err = -FC_EX_INV_LOGIN;
793 flogi = fc_frame_payload_get(fp, sizeof(*flogi));
795 err = -FC_EX_ALLOC_ERR;
798 r_a_tov = ntohl(flogi->fl_csp.sp_r_a_tov);
799 if (r_a_tov > rdata->r_a_tov)
800 rdata->r_a_tov = r_a_tov;
802 if (rdata->ids.port_name < lport->wwpn)
803 fc_rport_enter_plogi(rdata);
805 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
809 mutex_unlock(&rdata->rp_mutex);
811 kref_put(&rdata->kref, fc_rport_destroy);
814 FC_RPORT_DBG(rdata, "Bad FLOGI response\n");
815 fc_rport_error_retry(rdata, err);
820 * fc_rport_enter_flogi() - Send a FLOGI request to the remote port for p-mp
821 * @rdata: The remote port to send a FLOGI to
823 * Reference counting: increments kref when sending ELS
825 static void fc_rport_enter_flogi(struct fc_rport_priv *rdata)
827 struct fc_lport *lport = rdata->local_port;
830 lockdep_assert_held(&rdata->rp_mutex);
832 if (!lport->point_to_multipoint)
833 return fc_rport_enter_plogi(rdata);
835 FC_RPORT_DBG(rdata, "Entered FLOGI state from %s state\n",
836 fc_rport_state(rdata));
838 fc_rport_state_enter(rdata, RPORT_ST_FLOGI);
840 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
842 return fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
844 kref_get(&rdata->kref);
845 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_FLOGI,
846 fc_rport_flogi_resp, rdata,
847 2 * lport->r_a_tov)) {
848 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
849 kref_put(&rdata->kref, fc_rport_destroy);
854 * fc_rport_recv_flogi_req() - Handle Fabric Login (FLOGI) request in p-mp mode
855 * @lport: The local port that received the PLOGI request
856 * @rx_fp: The PLOGI request frame
858 * Reference counting: drops kref on return
860 static void fc_rport_recv_flogi_req(struct fc_lport *lport,
861 struct fc_frame *rx_fp)
863 struct fc_disc *disc;
864 struct fc_els_flogi *flp;
865 struct fc_rport_priv *rdata;
866 struct fc_frame *fp = rx_fp;
867 struct fc_seq_els_data rjt_data;
870 sid = fc_frame_sid(fp);
872 FC_RPORT_ID_DBG(lport, sid, "Received FLOGI request\n");
875 if (!lport->point_to_multipoint) {
876 rjt_data.reason = ELS_RJT_UNSUP;
877 rjt_data.explan = ELS_EXPL_NONE;
881 flp = fc_frame_payload_get(fp, sizeof(*flp));
883 rjt_data.reason = ELS_RJT_LOGIC;
884 rjt_data.explan = ELS_EXPL_INV_LEN;
888 rdata = fc_rport_lookup(lport, sid);
890 rjt_data.reason = ELS_RJT_FIP;
891 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
894 mutex_lock(&rdata->rp_mutex);
896 FC_RPORT_DBG(rdata, "Received FLOGI in %s state\n",
897 fc_rport_state(rdata));
899 switch (rdata->rp_state) {
902 * If received the FLOGI request on RPORT which is INIT state
903 * (means not transition to FLOGI either fc_rport timeout
904 * function didn;t trigger or this end hasn;t received
905 * beacon yet from other end. In that case only, allow RPORT
906 * state machine to continue, otherwise fall through which
907 * causes the code to send reject response.
908 * NOTE; Not checking for FIP->state such as VNMP_UP or
909 * VNMP_CLAIM because if FIP state is not one of those,
910 * RPORT wouldn;t have created and 'rport_lookup' would have
911 * failed anyway in that case.
914 case RPORT_ST_DELETE:
915 mutex_unlock(&rdata->rp_mutex);
916 rjt_data.reason = ELS_RJT_FIP;
917 rjt_data.explan = ELS_EXPL_NOT_NEIGHBOR;
920 case RPORT_ST_PLOGI_WAIT:
928 * Set the remote port to be deleted and to then restart.
929 * This queues work to be sure exchanges are reset.
931 fc_rport_enter_delete(rdata, RPORT_EV_LOGO);
932 mutex_unlock(&rdata->rp_mutex);
933 rjt_data.reason = ELS_RJT_BUSY;
934 rjt_data.explan = ELS_EXPL_NONE;
937 if (fc_rport_login_complete(rdata, fp)) {
938 mutex_unlock(&rdata->rp_mutex);
939 rjt_data.reason = ELS_RJT_LOGIC;
940 rjt_data.explan = ELS_EXPL_NONE;
944 fp = fc_frame_alloc(lport, sizeof(*flp));
948 fc_flogi_fill(lport, fp);
949 flp = fc_frame_payload_get(fp, sizeof(*flp));
950 flp->fl_cmd = ELS_LS_ACC;
952 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
953 lport->tt.frame_send(lport, fp);
956 * Do not proceed with the state machine if our
957 * FLOGI has crossed with an FLOGI from the
958 * remote port; wait for the FLOGI response instead.
960 if (rdata->rp_state != RPORT_ST_FLOGI) {
961 if (rdata->ids.port_name < lport->wwpn)
962 fc_rport_enter_plogi(rdata);
964 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
967 mutex_unlock(&rdata->rp_mutex);
968 kref_put(&rdata->kref, fc_rport_destroy);
969 fc_frame_free(rx_fp);
973 kref_put(&rdata->kref, fc_rport_destroy);
975 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
976 fc_frame_free(rx_fp);
980 * fc_rport_plogi_resp() - Handler for ELS PLOGI responses
981 * @sp: The sequence the PLOGI is on
982 * @fp: The PLOGI response frame
983 * @rdata_arg: The remote port that sent the PLOGI response
985 * Locking Note: This function will be called without the rport lock
986 * held, but it will lock, call an _enter_* function or fc_rport_error
987 * and then unlock the rport.
989 static void fc_rport_plogi_resp(struct fc_seq *sp, struct fc_frame *fp,
992 struct fc_rport_priv *rdata = rdata_arg;
993 struct fc_lport *lport = rdata->local_port;
994 struct fc_els_flogi *plp = NULL;
999 FC_RPORT_DBG(rdata, "Received a PLOGI %s\n", fc_els_resp_type(fp));
1001 if (fp == ERR_PTR(-FC_EX_CLOSED))
1004 mutex_lock(&rdata->rp_mutex);
1006 if (rdata->rp_state != RPORT_ST_PLOGI) {
1007 FC_RPORT_DBG(rdata, "Received a PLOGI response, but in state "
1008 "%s\n", fc_rport_state(rdata));
1015 fc_rport_error_retry(rdata, PTR_ERR(fp));
1019 op = fc_frame_payload_op(fp);
1020 if (op == ELS_LS_ACC &&
1021 (plp = fc_frame_payload_get(fp, sizeof(*plp))) != NULL) {
1022 rdata->ids.port_name = get_unaligned_be64(&plp->fl_wwpn);
1023 rdata->ids.node_name = get_unaligned_be64(&plp->fl_wwnn);
1025 /* save plogi response sp_features for further reference */
1026 rdata->sp_features = ntohs(plp->fl_csp.sp_features);
1028 if (lport->point_to_multipoint)
1029 fc_rport_login_complete(rdata, fp);
1030 csp_seq = ntohs(plp->fl_csp.sp_tot_seq);
1031 cssp_seq = ntohs(plp->fl_cssp[3 - 1].cp_con_seq);
1032 if (cssp_seq < csp_seq)
1034 rdata->max_seq = csp_seq;
1035 rdata->maxframe_size = fc_plogi_get_maxframe(plp, lport->mfs);
1036 fc_rport_enter_prli(rdata);
1038 struct fc_els_ls_rjt *rjt;
1040 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1041 FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n",
1042 rjt->er_reason, rjt->er_explan);
1043 fc_rport_error_retry(rdata, -FC_EX_ELS_RJT);
1048 mutex_unlock(&rdata->rp_mutex);
1050 kref_put(&rdata->kref, fc_rport_destroy);
1054 fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata)
1056 if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN)
1058 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) &&
1059 (lport->service_params & FCP_SPPF_INIT_FCN))
1061 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) &&
1062 (lport->service_params & FCP_SPPF_TARG_FCN))
1068 * fc_rport_enter_plogi() - Send Port Login (PLOGI) request
1069 * @rdata: The remote port to send a PLOGI to
1071 * Reference counting: increments kref when sending ELS
1073 static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
1075 struct fc_lport *lport = rdata->local_port;
1076 struct fc_frame *fp;
1078 lockdep_assert_held(&rdata->rp_mutex);
1080 if (!fc_rport_compatible_roles(lport, rdata)) {
1081 FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n");
1082 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
1086 FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
1087 fc_rport_state(rdata));
1089 fc_rport_state_enter(rdata, RPORT_ST_PLOGI);
1091 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
1092 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1094 FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__);
1095 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1098 rdata->e_d_tov = lport->e_d_tov;
1100 kref_get(&rdata->kref);
1101 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI,
1102 fc_rport_plogi_resp, rdata,
1103 2 * lport->r_a_tov)) {
1104 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1105 kref_put(&rdata->kref, fc_rport_destroy);
1110 * fc_rport_prli_resp() - Process Login (PRLI) response handler
1111 * @sp: The sequence the PRLI response was on
1112 * @fp: The PRLI response frame
1113 * @rdata_arg: The remote port that sent the PRLI response
1115 * Locking Note: This function will be called without the rport lock
1116 * held, but it will lock, call an _enter_* function or fc_rport_error
1117 * and then unlock the rport.
1119 static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
1122 struct fc_rport_priv *rdata = rdata_arg;
1124 struct fc_els_prli prli;
1125 struct fc_els_spp spp;
1127 struct fc_els_spp temp_spp;
1128 struct fc_els_ls_rjt *rjt;
1129 struct fc4_prov *prov;
1130 u32 roles = FC_RPORT_ROLE_UNKNOWN;
1133 enum fc_els_spp_resp resp_code;
1135 FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp));
1137 if (fp == ERR_PTR(-FC_EX_CLOSED))
1140 mutex_lock(&rdata->rp_mutex);
1142 if (rdata->rp_state != RPORT_ST_PRLI) {
1143 FC_RPORT_DBG(rdata, "Received a PRLI response, but in state "
1144 "%s\n", fc_rport_state(rdata));
1151 fc_rport_error_retry(rdata, PTR_ERR(fp));
1155 /* reinitialize remote port roles */
1156 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
1158 op = fc_frame_payload_op(fp);
1159 if (op == ELS_LS_ACC) {
1160 pp = fc_frame_payload_get(fp, sizeof(*pp));
1164 resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
1165 FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n",
1166 pp->spp.spp_flags, pp->spp.spp_type);
1167 rdata->spp_type = pp->spp.spp_type;
1168 if (resp_code != FC_SPP_RESP_ACK) {
1169 if (resp_code == FC_SPP_RESP_CONF)
1170 fc_rport_error(rdata, -FC_EX_SEQ_ERR);
1172 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1175 if (pp->prli.prli_spp_len < sizeof(pp->spp))
1178 fcp_parm = ntohl(pp->spp.spp_params);
1179 if (fcp_parm & FCP_SPPF_RETRY)
1180 rdata->flags |= FC_RP_FLAGS_RETRY;
1181 if (fcp_parm & FCP_SPPF_CONF_COMPL)
1182 rdata->flags |= FC_RP_FLAGS_CONF_REQ;
1185 * Call prli provider if we should act as a target
1187 prov = fc_passive_prov[rdata->spp_type];
1189 memset(&temp_spp, 0, sizeof(temp_spp));
1190 prov->prli(rdata, pp->prli.prli_spp_len,
1191 &pp->spp, &temp_spp);
1194 * Check if the image pair could be established
1196 if (rdata->spp_type != FC_TYPE_FCP ||
1197 !(pp->spp.spp_flags & FC_SPP_EST_IMG_PAIR)) {
1199 * Nope; we can't use this port as a target.
1201 fcp_parm &= ~FCP_SPPF_TARG_FCN;
1203 rdata->supported_classes = FC_COS_CLASS3;
1204 if (fcp_parm & FCP_SPPF_INIT_FCN)
1205 roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1206 if (fcp_parm & FCP_SPPF_TARG_FCN)
1207 roles |= FC_RPORT_ROLE_FCP_TARGET;
1209 rdata->ids.roles = roles;
1210 fc_rport_enter_rtv(rdata);
1213 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1214 FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
1215 rjt->er_reason, rjt->er_explan);
1216 fc_rport_error_retry(rdata, FC_EX_ELS_RJT);
1222 mutex_unlock(&rdata->rp_mutex);
1224 kref_put(&rdata->kref, fc_rport_destroy);
1228 * fc_rport_enter_prli() - Send Process Login (PRLI) request
1229 * @rdata: The remote port to send the PRLI request to
1231 * Reference counting: increments kref when sending ELS
1233 static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
1235 struct fc_lport *lport = rdata->local_port;
1237 struct fc_els_prli prli;
1238 struct fc_els_spp spp;
1240 struct fc_frame *fp;
1241 struct fc4_prov *prov;
1243 lockdep_assert_held(&rdata->rp_mutex);
1246 * If the rport is one of the well known addresses
1247 * we skip PRLI and RTV and go straight to READY.
1249 if (rdata->ids.port_id >= FC_FID_DOM_MGR) {
1250 fc_rport_enter_ready(rdata);
1255 * And if the local port does not support the initiator function
1256 * there's no need to send a PRLI, either.
1258 if (!(lport->service_params & FCP_SPPF_INIT_FCN)) {
1259 fc_rport_enter_ready(rdata);
1263 FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n",
1264 fc_rport_state(rdata));
1266 fc_rport_state_enter(rdata, RPORT_ST_PRLI);
1268 fp = fc_frame_alloc(lport, sizeof(*pp));
1270 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1274 fc_prli_fill(lport, fp);
1276 prov = fc_passive_prov[FC_TYPE_FCP];
1278 pp = fc_frame_payload_get(fp, sizeof(*pp));
1279 prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp);
1282 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id,
1283 fc_host_port_id(lport->host), FC_TYPE_ELS,
1284 FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
1286 kref_get(&rdata->kref);
1287 if (!fc_exch_seq_send(lport, fp, fc_rport_prli_resp,
1288 NULL, rdata, 2 * lport->r_a_tov)) {
1289 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1290 kref_put(&rdata->kref, fc_rport_destroy);
1295 * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses
1296 * @sp: The sequence the RTV was on
1297 * @fp: The RTV response frame
1298 * @rdata_arg: The remote port that sent the RTV response
1300 * Many targets don't seem to support this.
1302 * Locking Note: This function will be called without the rport lock
1303 * held, but it will lock, call an _enter_* function or fc_rport_error
1304 * and then unlock the rport.
1306 static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
1309 struct fc_rport_priv *rdata = rdata_arg;
1312 FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp));
1314 if (fp == ERR_PTR(-FC_EX_CLOSED))
1317 mutex_lock(&rdata->rp_mutex);
1319 if (rdata->rp_state != RPORT_ST_RTV) {
1320 FC_RPORT_DBG(rdata, "Received a RTV response, but in state "
1321 "%s\n", fc_rport_state(rdata));
1328 fc_rport_error(rdata, PTR_ERR(fp));
1332 op = fc_frame_payload_op(fp);
1333 if (op == ELS_LS_ACC) {
1334 struct fc_els_rtv_acc *rtv;
1338 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1340 toq = ntohl(rtv->rtv_toq);
1341 tov = ntohl(rtv->rtv_r_a_tov);
1344 if (tov > rdata->r_a_tov)
1345 rdata->r_a_tov = tov;
1346 tov = ntohl(rtv->rtv_e_d_tov);
1347 if (toq & FC_ELS_RTV_EDRES)
1351 if (tov > rdata->e_d_tov)
1352 rdata->e_d_tov = tov;
1356 fc_rport_enter_ready(rdata);
1361 mutex_unlock(&rdata->rp_mutex);
1363 kref_put(&rdata->kref, fc_rport_destroy);
1367 * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request
1368 * @rdata: The remote port to send the RTV request to
1370 * Reference counting: increments kref when sending ELS
1372 static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
1374 struct fc_frame *fp;
1375 struct fc_lport *lport = rdata->local_port;
1377 lockdep_assert_held(&rdata->rp_mutex);
1379 FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n",
1380 fc_rport_state(rdata));
1382 fc_rport_state_enter(rdata, RPORT_ST_RTV);
1384 fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
1386 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1390 kref_get(&rdata->kref);
1391 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
1392 fc_rport_rtv_resp, rdata,
1393 2 * lport->r_a_tov)) {
1394 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1395 kref_put(&rdata->kref, fc_rport_destroy);
1400 * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests
1401 * @rdata: The remote port that sent the RTV request
1402 * @in_fp: The RTV request frame
1404 static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata,
1405 struct fc_frame *in_fp)
1407 struct fc_lport *lport = rdata->local_port;
1408 struct fc_frame *fp;
1409 struct fc_els_rtv_acc *rtv;
1410 struct fc_seq_els_data rjt_data;
1412 lockdep_assert_held(&rdata->rp_mutex);
1413 lockdep_assert_held(&lport->lp_mutex);
1415 FC_RPORT_DBG(rdata, "Received RTV request\n");
1417 fp = fc_frame_alloc(lport, sizeof(*rtv));
1419 rjt_data.reason = ELS_RJT_UNAB;
1420 rjt_data.explan = ELS_EXPL_INSUF_RES;
1421 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1424 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1425 rtv->rtv_cmd = ELS_LS_ACC;
1426 rtv->rtv_r_a_tov = htonl(lport->r_a_tov);
1427 rtv->rtv_e_d_tov = htonl(lport->e_d_tov);
1429 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1430 lport->tt.frame_send(lport, fp);
1432 fc_frame_free(in_fp);
1436 * fc_rport_logo_resp() - Handler for logout (LOGO) responses
1437 * @sp: The sequence the LOGO was on
1438 * @fp: The LOGO response frame
1439 * @lport_arg: The local port
1441 static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1444 struct fc_rport_priv *rdata = rdata_arg;
1445 struct fc_lport *lport = rdata->local_port;
1447 FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did,
1448 "Received a LOGO %s\n", fc_els_resp_type(fp));
1451 kref_put(&rdata->kref, fc_rport_destroy);
1455 * fc_rport_enter_logo() - Send a logout (LOGO) request
1456 * @rdata: The remote port to send the LOGO request to
1458 * Reference counting: increments kref when sending ELS
1460 static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
1462 struct fc_lport *lport = rdata->local_port;
1463 struct fc_frame *fp;
1465 lockdep_assert_held(&rdata->rp_mutex);
1467 FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n",
1468 fc_rport_state(rdata));
1470 fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
1473 kref_get(&rdata->kref);
1474 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
1475 fc_rport_logo_resp, rdata, 0))
1476 kref_put(&rdata->kref, fc_rport_destroy);
1480 * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses
1481 * @sp: The sequence the ADISC response was on
1482 * @fp: The ADISC response frame
1483 * @rdata_arg: The remote port that sent the ADISC response
1485 * Locking Note: This function will be called without the rport lock
1486 * held, but it will lock, call an _enter_* function or fc_rport_error
1487 * and then unlock the rport.
1489 static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
1492 struct fc_rport_priv *rdata = rdata_arg;
1493 struct fc_els_adisc *adisc;
1496 FC_RPORT_DBG(rdata, "Received a ADISC response\n");
1498 if (fp == ERR_PTR(-FC_EX_CLOSED))
1501 mutex_lock(&rdata->rp_mutex);
1503 if (rdata->rp_state != RPORT_ST_ADISC) {
1504 FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n",
1505 fc_rport_state(rdata));
1512 fc_rport_error(rdata, PTR_ERR(fp));
1517 * If address verification failed. Consider us logged out of the rport.
1518 * Since the rport is still in discovery, we want to be
1519 * logged in, so go to PLOGI state. Otherwise, go back to READY.
1521 op = fc_frame_payload_op(fp);
1522 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1523 if (op != ELS_LS_ACC || !adisc ||
1524 ntoh24(adisc->adisc_port_id) != rdata->ids.port_id ||
1525 get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
1526 get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
1527 FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
1528 fc_rport_enter_flogi(rdata);
1530 FC_RPORT_DBG(rdata, "ADISC OK\n");
1531 fc_rport_enter_ready(rdata);
1536 mutex_unlock(&rdata->rp_mutex);
1538 kref_put(&rdata->kref, fc_rport_destroy);
1542 * fc_rport_enter_adisc() - Send Address Discover (ADISC) request
1543 * @rdata: The remote port to send the ADISC request to
1545 * Reference counting: increments kref when sending ELS
1547 static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
1549 struct fc_lport *lport = rdata->local_port;
1550 struct fc_frame *fp;
1552 lockdep_assert_held(&rdata->rp_mutex);
1554 FC_RPORT_DBG(rdata, "sending ADISC from %s state\n",
1555 fc_rport_state(rdata));
1557 fc_rport_state_enter(rdata, RPORT_ST_ADISC);
1559 fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc));
1561 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1564 kref_get(&rdata->kref);
1565 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC,
1566 fc_rport_adisc_resp, rdata,
1567 2 * lport->r_a_tov)) {
1568 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1569 kref_put(&rdata->kref, fc_rport_destroy);
1574 * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
1575 * @rdata: The remote port that sent the ADISC request
1576 * @in_fp: The ADISC request frame
1578 static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
1579 struct fc_frame *in_fp)
1581 struct fc_lport *lport = rdata->local_port;
1582 struct fc_frame *fp;
1583 struct fc_els_adisc *adisc;
1584 struct fc_seq_els_data rjt_data;
1586 lockdep_assert_held(&rdata->rp_mutex);
1587 lockdep_assert_held(&lport->lp_mutex);
1589 FC_RPORT_DBG(rdata, "Received ADISC request\n");
1591 adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
1593 rjt_data.reason = ELS_RJT_PROT;
1594 rjt_data.explan = ELS_EXPL_INV_LEN;
1595 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1599 fp = fc_frame_alloc(lport, sizeof(*adisc));
1602 fc_adisc_fill(lport, fp);
1603 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1604 adisc->adisc_cmd = ELS_LS_ACC;
1605 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1606 lport->tt.frame_send(lport, fp);
1608 fc_frame_free(in_fp);
1612 * fc_rport_recv_rls_req() - Handle received Read Link Status request
1613 * @rdata: The remote port that sent the RLS request
1614 * @rx_fp: The PRLI request frame
1616 static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
1617 struct fc_frame *rx_fp)
1620 struct fc_lport *lport = rdata->local_port;
1621 struct fc_frame *fp;
1622 struct fc_els_rls *rls;
1623 struct fc_els_rls_resp *rsp;
1624 struct fc_els_lesb *lesb;
1625 struct fc_seq_els_data rjt_data;
1626 struct fc_host_statistics *hst;
1628 lockdep_assert_held(&rdata->rp_mutex);
1630 FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
1631 fc_rport_state(rdata));
1633 rls = fc_frame_payload_get(rx_fp, sizeof(*rls));
1635 rjt_data.reason = ELS_RJT_PROT;
1636 rjt_data.explan = ELS_EXPL_INV_LEN;
1640 fp = fc_frame_alloc(lport, sizeof(*rsp));
1642 rjt_data.reason = ELS_RJT_UNAB;
1643 rjt_data.explan = ELS_EXPL_INSUF_RES;
1647 rsp = fc_frame_payload_get(fp, sizeof(*rsp));
1648 memset(rsp, 0, sizeof(*rsp));
1649 rsp->rls_cmd = ELS_LS_ACC;
1650 lesb = &rsp->rls_lesb;
1651 if (lport->tt.get_lesb) {
1652 /* get LESB from LLD if it supports it */
1653 lport->tt.get_lesb(lport, lesb);
1655 fc_get_host_stats(lport->host);
1656 hst = &lport->host_stats;
1657 lesb->lesb_link_fail = htonl(hst->link_failure_count);
1658 lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count);
1659 lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count);
1660 lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count);
1661 lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count);
1662 lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
1665 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1666 lport->tt.frame_send(lport, fp);
1670 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
1672 fc_frame_free(rx_fp);
1676 * fc_rport_recv_els_req() - Handler for validated ELS requests
1677 * @lport: The local port that received the ELS request
1678 * @fp: The ELS request frame
1680 * Handle incoming ELS requests that require port login.
1681 * The ELS opcode has already been validated by the caller.
1683 * Reference counting: does not modify kref
1685 static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
1687 struct fc_rport_priv *rdata;
1688 struct fc_seq_els_data els_data;
1690 lockdep_assert_held(&lport->lp_mutex);
1692 rdata = fc_rport_lookup(lport, fc_frame_sid(fp));
1694 FC_RPORT_ID_DBG(lport, fc_frame_sid(fp),
1695 "Received ELS 0x%02x from non-logged-in port\n",
1696 fc_frame_payload_op(fp));
1700 mutex_lock(&rdata->rp_mutex);
1702 switch (rdata->rp_state) {
1705 case RPORT_ST_READY:
1706 case RPORT_ST_ADISC:
1708 case RPORT_ST_PLOGI:
1709 if (fc_frame_payload_op(fp) == ELS_PRLI) {
1710 FC_RPORT_DBG(rdata, "Reject ELS PRLI "
1711 "while in state %s\n",
1712 fc_rport_state(rdata));
1713 mutex_unlock(&rdata->rp_mutex);
1714 kref_put(&rdata->kref, fc_rport_destroy);
1719 "Reject ELS 0x%02x while in state %s\n",
1720 fc_frame_payload_op(fp), fc_rport_state(rdata));
1721 mutex_unlock(&rdata->rp_mutex);
1722 kref_put(&rdata->kref, fc_rport_destroy);
1726 switch (fc_frame_payload_op(fp)) {
1728 fc_rport_recv_prli_req(rdata, fp);
1731 fc_rport_recv_prlo_req(rdata, fp);
1734 fc_rport_recv_adisc_req(rdata, fp);
1737 fc_seq_els_rsp_send(fp, ELS_RRQ, NULL);
1741 fc_seq_els_rsp_send(fp, ELS_REC, NULL);
1745 fc_rport_recv_rls_req(rdata, fp);
1748 fc_rport_recv_rtv_req(rdata, fp);
1751 fc_frame_free(fp); /* can't happen */
1755 mutex_unlock(&rdata->rp_mutex);
1756 kref_put(&rdata->kref, fc_rport_destroy);
1760 els_data.reason = ELS_RJT_UNAB;
1761 els_data.explan = ELS_EXPL_PLOGI_REQD;
1762 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1767 els_data.reason = ELS_RJT_BUSY;
1768 els_data.explan = ELS_EXPL_NONE;
1769 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1775 * fc_rport_recv_req() - Handler for requests
1776 * @lport: The local port that received the request
1777 * @fp: The request frame
1779 * Reference counting: does not modify kref
1781 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
1783 struct fc_seq_els_data els_data;
1785 lockdep_assert_held(&lport->lp_mutex);
1788 * Handle FLOGI, PLOGI and LOGO requests separately, since they
1789 * don't require prior login.
1790 * Check for unsupported opcodes first and reject them.
1791 * For some ops, it would be incorrect to reject with "PLOGI required".
1793 switch (fc_frame_payload_op(fp)) {
1795 fc_rport_recv_flogi_req(lport, fp);
1798 fc_rport_recv_plogi_req(lport, fp);
1801 fc_rport_recv_logo_req(lport, fp);
1810 fc_rport_recv_els_req(lport, fp);
1813 els_data.reason = ELS_RJT_UNSUP;
1814 els_data.explan = ELS_EXPL_NONE;
1815 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1820 EXPORT_SYMBOL(fc_rport_recv_req);
1823 * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
1824 * @lport: The local port that received the PLOGI request
1825 * @rx_fp: The PLOGI request frame
1827 * Reference counting: increments kref on return
1829 static void fc_rport_recv_plogi_req(struct fc_lport *lport,
1830 struct fc_frame *rx_fp)
1832 struct fc_disc *disc;
1833 struct fc_rport_priv *rdata;
1834 struct fc_frame *fp = rx_fp;
1835 struct fc_els_flogi *pl;
1836 struct fc_seq_els_data rjt_data;
1839 lockdep_assert_held(&lport->lp_mutex);
1841 sid = fc_frame_sid(fp);
1843 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
1845 pl = fc_frame_payload_get(fp, sizeof(*pl));
1847 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n");
1848 rjt_data.reason = ELS_RJT_PROT;
1849 rjt_data.explan = ELS_EXPL_INV_LEN;
1853 disc = &lport->disc;
1854 mutex_lock(&disc->disc_mutex);
1855 rdata = fc_rport_create(lport, sid);
1857 mutex_unlock(&disc->disc_mutex);
1858 rjt_data.reason = ELS_RJT_UNAB;
1859 rjt_data.explan = ELS_EXPL_INSUF_RES;
1863 mutex_lock(&rdata->rp_mutex);
1864 mutex_unlock(&disc->disc_mutex);
1866 rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn);
1867 rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn);
1870 * If the rport was just created, possibly due to the incoming PLOGI,
1871 * set the state appropriately and accept the PLOGI.
1873 * If we had also sent a PLOGI, and if the received PLOGI is from a
1874 * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason
1875 * "command already in progress".
1877 * XXX TBD: If the session was ready before, the PLOGI should result in
1878 * all outstanding exchanges being reset.
1880 switch (rdata->rp_state) {
1882 FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
1884 case RPORT_ST_PLOGI_WAIT:
1885 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n");
1887 case RPORT_ST_PLOGI:
1888 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
1889 if (rdata->ids.port_name < lport->wwpn) {
1890 mutex_unlock(&rdata->rp_mutex);
1891 rjt_data.reason = ELS_RJT_INPROG;
1892 rjt_data.explan = ELS_EXPL_NONE;
1898 case RPORT_ST_READY:
1899 case RPORT_ST_ADISC:
1900 FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d "
1901 "- ignored for now\n", rdata->rp_state);
1902 /* XXX TBD - should reset */
1904 case RPORT_ST_FLOGI:
1905 case RPORT_ST_DELETE:
1906 FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n",
1907 fc_rport_state(rdata));
1908 mutex_unlock(&rdata->rp_mutex);
1909 rjt_data.reason = ELS_RJT_BUSY;
1910 rjt_data.explan = ELS_EXPL_NONE;
1913 if (!fc_rport_compatible_roles(lport, rdata)) {
1914 FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n");
1915 mutex_unlock(&rdata->rp_mutex);
1916 rjt_data.reason = ELS_RJT_LOGIC;
1917 rjt_data.explan = ELS_EXPL_NONE;
1922 * Get session payload size from incoming PLOGI.
1924 rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
1927 * Send LS_ACC. If this fails, the originator should retry.
1929 fp = fc_frame_alloc(lport, sizeof(*pl));
1933 fc_plogi_fill(lport, fp, ELS_LS_ACC);
1934 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1935 lport->tt.frame_send(lport, fp);
1936 fc_rport_enter_prli(rdata);
1938 mutex_unlock(&rdata->rp_mutex);
1939 fc_frame_free(rx_fp);
1943 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
1948 * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
1949 * @rdata: The remote port that sent the PRLI request
1950 * @rx_fp: The PRLI request frame
1952 static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
1953 struct fc_frame *rx_fp)
1955 struct fc_lport *lport = rdata->local_port;
1956 struct fc_frame *fp;
1958 struct fc_els_prli prli;
1959 struct fc_els_spp spp;
1961 struct fc_els_spp *rspp; /* request service param page */
1962 struct fc_els_spp *spp; /* response spp */
1965 enum fc_els_spp_resp resp;
1966 struct fc_seq_els_data rjt_data;
1967 struct fc4_prov *prov;
1969 lockdep_assert_held(&rdata->rp_mutex);
1971 FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
1972 fc_rport_state(rdata));
1974 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
1975 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
1978 plen = ntohs(pp->prli.prli_len);
1979 if ((plen % 4) != 0 || plen > len || plen < 16)
1983 plen = pp->prli.prli_spp_len;
1984 if ((plen % 4) != 0 || plen < sizeof(*spp) ||
1985 plen > len || len < sizeof(*pp) || plen < 12)
1989 fp = fc_frame_alloc(lport, len);
1991 rjt_data.reason = ELS_RJT_UNAB;
1992 rjt_data.explan = ELS_EXPL_INSUF_RES;
1995 pp = fc_frame_payload_get(fp, len);
1998 pp->prli.prli_cmd = ELS_LS_ACC;
1999 pp->prli.prli_spp_len = plen;
2000 pp->prli.prli_len = htons(len);
2001 len -= sizeof(struct fc_els_prli);
2004 * Go through all the service parameter pages and build
2005 * response. If plen indicates longer SPP than standard,
2006 * use that. The entire response has been pre-cleared above.
2009 mutex_lock(&fc_prov_mutex);
2010 while (len >= plen) {
2011 rdata->spp_type = rspp->spp_type;
2012 spp->spp_type = rspp->spp_type;
2013 spp->spp_type_ext = rspp->spp_type_ext;
2016 if (rspp->spp_type < FC_FC4_PROV_SIZE) {
2017 enum fc_els_spp_resp active = 0, passive = 0;
2019 prov = fc_active_prov[rspp->spp_type];
2021 active = prov->prli(rdata, plen, rspp, spp);
2022 prov = fc_passive_prov[rspp->spp_type];
2024 passive = prov->prli(rdata, plen, rspp, spp);
2025 if (!active || passive == FC_SPP_RESP_ACK)
2029 FC_RPORT_DBG(rdata, "PRLI rspp type %x "
2030 "active %x passive %x\n",
2031 rspp->spp_type, active, passive);
2034 if (spp->spp_flags & FC_SPP_EST_IMG_PAIR)
2035 resp |= FC_SPP_RESP_CONF;
2037 resp |= FC_SPP_RESP_INVL;
2039 spp->spp_flags |= resp;
2041 rspp = (struct fc_els_spp *)((char *)rspp + plen);
2042 spp = (struct fc_els_spp *)((char *)spp + plen);
2044 mutex_unlock(&fc_prov_mutex);
2047 * Send LS_ACC. If this fails, the originator should retry.
2049 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2050 lport->tt.frame_send(lport, fp);
2055 rjt_data.reason = ELS_RJT_PROT;
2056 rjt_data.explan = ELS_EXPL_INV_LEN;
2058 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2060 fc_frame_free(rx_fp);
2064 * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
2065 * @rdata: The remote port that sent the PRLO request
2066 * @rx_fp: The PRLO request frame
2068 static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
2069 struct fc_frame *rx_fp)
2071 struct fc_lport *lport = rdata->local_port;
2072 struct fc_frame *fp;
2074 struct fc_els_prlo prlo;
2075 struct fc_els_spp spp;
2077 struct fc_els_spp *rspp; /* request service param page */
2078 struct fc_els_spp *spp; /* response spp */
2081 struct fc_seq_els_data rjt_data;
2083 lockdep_assert_held(&rdata->rp_mutex);
2085 FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
2086 fc_rport_state(rdata));
2088 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
2089 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
2092 plen = ntohs(pp->prlo.prlo_len);
2100 fp = fc_frame_alloc(lport, len);
2102 rjt_data.reason = ELS_RJT_UNAB;
2103 rjt_data.explan = ELS_EXPL_INSUF_RES;
2107 pp = fc_frame_payload_get(fp, len);
2110 pp->prlo.prlo_cmd = ELS_LS_ACC;
2111 pp->prlo.prlo_obs = 0x10;
2112 pp->prlo.prlo_len = htons(len);
2114 spp->spp_type = rspp->spp_type;
2115 spp->spp_type_ext = rspp->spp_type_ext;
2116 spp->spp_flags = FC_SPP_RESP_ACK;
2118 fc_rport_enter_prli(rdata);
2120 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2121 lport->tt.frame_send(lport, fp);
2125 rjt_data.reason = ELS_RJT_PROT;
2126 rjt_data.explan = ELS_EXPL_INV_LEN;
2128 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2130 fc_frame_free(rx_fp);
2134 * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
2135 * @lport: The local port that received the LOGO request
2136 * @fp: The LOGO request frame
2138 * Reference counting: drops kref on return
2140 static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
2142 struct fc_rport_priv *rdata;
2145 lockdep_assert_held(&lport->lp_mutex);
2147 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
2149 sid = fc_frame_sid(fp);
2151 rdata = fc_rport_lookup(lport, sid);
2153 mutex_lock(&rdata->rp_mutex);
2154 FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
2155 fc_rport_state(rdata));
2157 rdata->flags &= ~FC_RP_STARTED;
2158 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
2159 mutex_unlock(&rdata->rp_mutex);
2160 kref_put(&rdata->kref, fc_rport_destroy);
2162 FC_RPORT_ID_DBG(lport, sid,
2163 "Received LOGO from non-logged-in port\n");
2168 * fc_rport_flush_queue() - Flush the rport_event_queue
2170 void fc_rport_flush_queue(void)
2172 flush_workqueue(rport_event_queue);
2174 EXPORT_SYMBOL(fc_rport_flush_queue);
2177 * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator.
2178 * @rdata: remote port private
2179 * @spp_len: service parameter page length
2180 * @rspp: received service parameter page
2181 * @spp: response service parameter page
2183 * Returns the value for the response code to be placed in spp_flags;
2184 * Returns 0 if not an initiator.
2186 static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len,
2187 const struct fc_els_spp *rspp,
2188 struct fc_els_spp *spp)
2190 struct fc_lport *lport = rdata->local_port;
2193 fcp_parm = ntohl(rspp->spp_params);
2194 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
2195 if (fcp_parm & FCP_SPPF_INIT_FCN)
2196 rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
2197 if (fcp_parm & FCP_SPPF_TARG_FCN)
2198 rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
2199 if (fcp_parm & FCP_SPPF_RETRY)
2200 rdata->flags |= FC_RP_FLAGS_RETRY;
2201 rdata->supported_classes = FC_COS_CLASS3;
2203 if (!(lport->service_params & FCP_SPPF_INIT_FCN))
2206 spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
2209 * OR in our service parameters with other providers (target), if any.
2211 fcp_parm = ntohl(spp->spp_params);
2212 spp->spp_params = htonl(fcp_parm | lport->service_params);
2213 return FC_SPP_RESP_ACK;
2217 * FC-4 provider ops for FCP initiator.
2219 struct fc4_prov fc_rport_fcp_init = {
2220 .prli = fc_rport_fcp_prli,
2224 * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0
2225 * @rdata: remote port private
2226 * @spp_len: service parameter page length
2227 * @rspp: received service parameter page
2228 * @spp: response service parameter page
2230 static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len,
2231 const struct fc_els_spp *rspp,
2232 struct fc_els_spp *spp)
2234 if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR)
2235 return FC_SPP_RESP_INVL;
2236 return FC_SPP_RESP_ACK;
2240 * FC-4 provider ops for type 0 service parameters.
2242 * This handles the special case of type 0 which is always successful
2243 * but doesn't do anything otherwise.
2245 struct fc4_prov fc_rport_t0_prov = {
2246 .prli = fc_rport_t0_prli,
2250 * fc_setup_rport() - Initialize the rport_event_queue
2252 int fc_setup_rport(void)
2254 rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
2255 if (!rport_event_queue)
2261 * fc_destroy_rport() - Destroy the rport_event_queue
2263 void fc_destroy_rport(void)
2265 destroy_workqueue(rport_event_queue);
2269 * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port
2270 * @rport: The remote port whose I/O should be terminated
2272 void fc_rport_terminate_io(struct fc_rport *rport)
2274 struct fc_rport_libfc_priv *rpriv = rport->dd_data;
2275 struct fc_lport *lport = rpriv->local_port;
2277 lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
2278 lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
2280 EXPORT_SYMBOL(fc_rport_terminate_io);