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));
1042 FC_RPORT_DBG(rdata, "PLOGI bad response\n");
1044 FC_RPORT_DBG(rdata, "PLOGI ELS rejected, reason %x expl %x\n",
1045 rjt->er_reason, rjt->er_explan);
1046 fc_rport_error_retry(rdata, -FC_EX_ELS_RJT);
1051 mutex_unlock(&rdata->rp_mutex);
1053 kref_put(&rdata->kref, fc_rport_destroy);
1057 fc_rport_compatible_roles(struct fc_lport *lport, struct fc_rport_priv *rdata)
1059 if (rdata->ids.roles == FC_PORT_ROLE_UNKNOWN)
1061 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_TARGET) &&
1062 (lport->service_params & FCP_SPPF_INIT_FCN))
1064 if ((rdata->ids.roles & FC_PORT_ROLE_FCP_INITIATOR) &&
1065 (lport->service_params & FCP_SPPF_TARG_FCN))
1071 * fc_rport_enter_plogi() - Send Port Login (PLOGI) request
1072 * @rdata: The remote port to send a PLOGI to
1074 * Reference counting: increments kref when sending ELS
1076 static void fc_rport_enter_plogi(struct fc_rport_priv *rdata)
1078 struct fc_lport *lport = rdata->local_port;
1079 struct fc_frame *fp;
1081 lockdep_assert_held(&rdata->rp_mutex);
1083 if (!fc_rport_compatible_roles(lport, rdata)) {
1084 FC_RPORT_DBG(rdata, "PLOGI suppressed for incompatible role\n");
1085 fc_rport_state_enter(rdata, RPORT_ST_PLOGI_WAIT);
1089 FC_RPORT_DBG(rdata, "Port entered PLOGI state from %s state\n",
1090 fc_rport_state(rdata));
1092 fc_rport_state_enter(rdata, RPORT_ST_PLOGI);
1094 rdata->maxframe_size = FC_MIN_MAX_PAYLOAD;
1095 fp = fc_frame_alloc(lport, sizeof(struct fc_els_flogi));
1097 FC_RPORT_DBG(rdata, "%s frame alloc failed\n", __func__);
1098 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1101 rdata->e_d_tov = lport->e_d_tov;
1103 kref_get(&rdata->kref);
1104 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_PLOGI,
1105 fc_rport_plogi_resp, rdata,
1106 2 * lport->r_a_tov)) {
1107 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1108 kref_put(&rdata->kref, fc_rport_destroy);
1113 * fc_rport_prli_resp() - Process Login (PRLI) response handler
1114 * @sp: The sequence the PRLI response was on
1115 * @fp: The PRLI response frame
1116 * @rdata_arg: The remote port that sent the PRLI response
1118 * Locking Note: This function will be called without the rport lock
1119 * held, but it will lock, call an _enter_* function or fc_rport_error
1120 * and then unlock the rport.
1122 static void fc_rport_prli_resp(struct fc_seq *sp, struct fc_frame *fp,
1125 struct fc_rport_priv *rdata = rdata_arg;
1127 struct fc_els_prli prli;
1128 struct fc_els_spp spp;
1130 struct fc_els_spp temp_spp;
1131 struct fc_els_ls_rjt *rjt;
1132 struct fc4_prov *prov;
1133 u32 roles = FC_RPORT_ROLE_UNKNOWN;
1136 enum fc_els_spp_resp resp_code;
1138 FC_RPORT_DBG(rdata, "Received a PRLI %s\n", fc_els_resp_type(fp));
1140 if (fp == ERR_PTR(-FC_EX_CLOSED))
1143 mutex_lock(&rdata->rp_mutex);
1145 if (rdata->rp_state != RPORT_ST_PRLI) {
1146 FC_RPORT_DBG(rdata, "Received a PRLI response, but in state "
1147 "%s\n", fc_rport_state(rdata));
1154 fc_rport_error_retry(rdata, PTR_ERR(fp));
1158 /* reinitialize remote port roles */
1159 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
1161 op = fc_frame_payload_op(fp);
1162 if (op == ELS_LS_ACC) {
1163 pp = fc_frame_payload_get(fp, sizeof(*pp));
1165 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1169 resp_code = (pp->spp.spp_flags & FC_SPP_RESP_MASK);
1170 FC_RPORT_DBG(rdata, "PRLI spp_flags = 0x%x spp_type 0x%x\n",
1171 pp->spp.spp_flags, pp->spp.spp_type);
1172 rdata->spp_type = pp->spp.spp_type;
1173 if (resp_code != FC_SPP_RESP_ACK) {
1174 if (resp_code == FC_SPP_RESP_CONF)
1175 fc_rport_error(rdata, -FC_EX_SEQ_ERR);
1177 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1180 if (pp->prli.prli_spp_len < sizeof(pp->spp)) {
1181 fc_rport_error_retry(rdata, -FC_EX_SEQ_ERR);
1185 fcp_parm = ntohl(pp->spp.spp_params);
1186 if (fcp_parm & FCP_SPPF_RETRY)
1187 rdata->flags |= FC_RP_FLAGS_RETRY;
1188 if (fcp_parm & FCP_SPPF_CONF_COMPL)
1189 rdata->flags |= FC_RP_FLAGS_CONF_REQ;
1192 * Call prli provider if we should act as a target
1194 prov = fc_passive_prov[rdata->spp_type];
1196 memset(&temp_spp, 0, sizeof(temp_spp));
1197 prov->prli(rdata, pp->prli.prli_spp_len,
1198 &pp->spp, &temp_spp);
1201 * Check if the image pair could be established
1203 if (rdata->spp_type != FC_TYPE_FCP ||
1204 !(pp->spp.spp_flags & FC_SPP_EST_IMG_PAIR)) {
1206 * Nope; we can't use this port as a target.
1208 fcp_parm &= ~FCP_SPPF_TARG_FCN;
1210 rdata->supported_classes = FC_COS_CLASS3;
1211 if (fcp_parm & FCP_SPPF_INIT_FCN)
1212 roles |= FC_RPORT_ROLE_FCP_INITIATOR;
1213 if (fcp_parm & FCP_SPPF_TARG_FCN)
1214 roles |= FC_RPORT_ROLE_FCP_TARGET;
1216 rdata->ids.roles = roles;
1217 fc_rport_enter_rtv(rdata);
1220 rjt = fc_frame_payload_get(fp, sizeof(*rjt));
1222 FC_RPORT_DBG(rdata, "PRLI bad response\n");
1224 FC_RPORT_DBG(rdata, "PRLI ELS rejected, reason %x expl %x\n",
1225 rjt->er_reason, rjt->er_explan);
1226 fc_rport_error_retry(rdata, FC_EX_ELS_RJT);
1232 mutex_unlock(&rdata->rp_mutex);
1234 kref_put(&rdata->kref, fc_rport_destroy);
1238 * fc_rport_enter_prli() - Send Process Login (PRLI) request
1239 * @rdata: The remote port to send the PRLI request to
1241 * Reference counting: increments kref when sending ELS
1243 static void fc_rport_enter_prli(struct fc_rport_priv *rdata)
1245 struct fc_lport *lport = rdata->local_port;
1247 struct fc_els_prli prli;
1248 struct fc_els_spp spp;
1250 struct fc_frame *fp;
1251 struct fc4_prov *prov;
1253 lockdep_assert_held(&rdata->rp_mutex);
1256 * If the rport is one of the well known addresses
1257 * we skip PRLI and RTV and go straight to READY.
1259 if (rdata->ids.port_id >= FC_FID_DOM_MGR) {
1260 fc_rport_enter_ready(rdata);
1265 * And if the local port does not support the initiator function
1266 * there's no need to send a PRLI, either.
1268 if (!(lport->service_params & FCP_SPPF_INIT_FCN)) {
1269 fc_rport_enter_ready(rdata);
1273 FC_RPORT_DBG(rdata, "Port entered PRLI state from %s state\n",
1274 fc_rport_state(rdata));
1276 fc_rport_state_enter(rdata, RPORT_ST_PRLI);
1278 fp = fc_frame_alloc(lport, sizeof(*pp));
1280 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1284 fc_prli_fill(lport, fp);
1286 prov = fc_passive_prov[FC_TYPE_FCP];
1288 pp = fc_frame_payload_get(fp, sizeof(*pp));
1289 prov->prli(rdata, sizeof(pp->spp), NULL, &pp->spp);
1292 fc_fill_fc_hdr(fp, FC_RCTL_ELS_REQ, rdata->ids.port_id,
1293 fc_host_port_id(lport->host), FC_TYPE_ELS,
1294 FC_FC_FIRST_SEQ | FC_FC_END_SEQ | FC_FC_SEQ_INIT, 0);
1296 kref_get(&rdata->kref);
1297 if (!fc_exch_seq_send(lport, fp, fc_rport_prli_resp,
1298 NULL, rdata, 2 * lport->r_a_tov)) {
1299 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1300 kref_put(&rdata->kref, fc_rport_destroy);
1305 * fc_rport_rtv_resp() - Handler for Request Timeout Value (RTV) responses
1306 * @sp: The sequence the RTV was on
1307 * @fp: The RTV response frame
1308 * @rdata_arg: The remote port that sent the RTV response
1310 * Many targets don't seem to support this.
1312 * Locking Note: This function will be called without the rport lock
1313 * held, but it will lock, call an _enter_* function or fc_rport_error
1314 * and then unlock the rport.
1316 static void fc_rport_rtv_resp(struct fc_seq *sp, struct fc_frame *fp,
1319 struct fc_rport_priv *rdata = rdata_arg;
1322 FC_RPORT_DBG(rdata, "Received a RTV %s\n", fc_els_resp_type(fp));
1324 if (fp == ERR_PTR(-FC_EX_CLOSED))
1327 mutex_lock(&rdata->rp_mutex);
1329 if (rdata->rp_state != RPORT_ST_RTV) {
1330 FC_RPORT_DBG(rdata, "Received a RTV response, but in state "
1331 "%s\n", fc_rport_state(rdata));
1338 fc_rport_error(rdata, PTR_ERR(fp));
1342 op = fc_frame_payload_op(fp);
1343 if (op == ELS_LS_ACC) {
1344 struct fc_els_rtv_acc *rtv;
1348 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1350 toq = ntohl(rtv->rtv_toq);
1351 tov = ntohl(rtv->rtv_r_a_tov);
1354 if (tov > rdata->r_a_tov)
1355 rdata->r_a_tov = tov;
1356 tov = ntohl(rtv->rtv_e_d_tov);
1357 if (toq & FC_ELS_RTV_EDRES)
1361 if (tov > rdata->e_d_tov)
1362 rdata->e_d_tov = tov;
1366 fc_rport_enter_ready(rdata);
1371 mutex_unlock(&rdata->rp_mutex);
1373 kref_put(&rdata->kref, fc_rport_destroy);
1377 * fc_rport_enter_rtv() - Send Request Timeout Value (RTV) request
1378 * @rdata: The remote port to send the RTV request to
1380 * Reference counting: increments kref when sending ELS
1382 static void fc_rport_enter_rtv(struct fc_rport_priv *rdata)
1384 struct fc_frame *fp;
1385 struct fc_lport *lport = rdata->local_port;
1387 lockdep_assert_held(&rdata->rp_mutex);
1389 FC_RPORT_DBG(rdata, "Port entered RTV state from %s state\n",
1390 fc_rport_state(rdata));
1392 fc_rport_state_enter(rdata, RPORT_ST_RTV);
1394 fp = fc_frame_alloc(lport, sizeof(struct fc_els_rtv));
1396 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1400 kref_get(&rdata->kref);
1401 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_RTV,
1402 fc_rport_rtv_resp, rdata,
1403 2 * lport->r_a_tov)) {
1404 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1405 kref_put(&rdata->kref, fc_rport_destroy);
1410 * fc_rport_recv_rtv_req() - Handler for Read Timeout Value (RTV) requests
1411 * @rdata: The remote port that sent the RTV request
1412 * @in_fp: The RTV request frame
1414 static void fc_rport_recv_rtv_req(struct fc_rport_priv *rdata,
1415 struct fc_frame *in_fp)
1417 struct fc_lport *lport = rdata->local_port;
1418 struct fc_frame *fp;
1419 struct fc_els_rtv_acc *rtv;
1420 struct fc_seq_els_data rjt_data;
1422 lockdep_assert_held(&rdata->rp_mutex);
1423 lockdep_assert_held(&lport->lp_mutex);
1425 FC_RPORT_DBG(rdata, "Received RTV request\n");
1427 fp = fc_frame_alloc(lport, sizeof(*rtv));
1429 rjt_data.reason = ELS_RJT_UNAB;
1430 rjt_data.explan = ELS_EXPL_INSUF_RES;
1431 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1434 rtv = fc_frame_payload_get(fp, sizeof(*rtv));
1435 rtv->rtv_cmd = ELS_LS_ACC;
1436 rtv->rtv_r_a_tov = htonl(lport->r_a_tov);
1437 rtv->rtv_e_d_tov = htonl(lport->e_d_tov);
1439 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1440 lport->tt.frame_send(lport, fp);
1442 fc_frame_free(in_fp);
1446 * fc_rport_logo_resp() - Handler for logout (LOGO) responses
1447 * @sp: The sequence the LOGO was on
1448 * @fp: The LOGO response frame
1449 * @lport_arg: The local port
1451 static void fc_rport_logo_resp(struct fc_seq *sp, struct fc_frame *fp,
1454 struct fc_rport_priv *rdata = rdata_arg;
1455 struct fc_lport *lport = rdata->local_port;
1457 FC_RPORT_ID_DBG(lport, fc_seq_exch(sp)->did,
1458 "Received a LOGO %s\n", fc_els_resp_type(fp));
1461 kref_put(&rdata->kref, fc_rport_destroy);
1465 * fc_rport_enter_logo() - Send a logout (LOGO) request
1466 * @rdata: The remote port to send the LOGO request to
1468 * Reference counting: increments kref when sending ELS
1470 static void fc_rport_enter_logo(struct fc_rport_priv *rdata)
1472 struct fc_lport *lport = rdata->local_port;
1473 struct fc_frame *fp;
1475 lockdep_assert_held(&rdata->rp_mutex);
1477 FC_RPORT_DBG(rdata, "Port sending LOGO from %s state\n",
1478 fc_rport_state(rdata));
1480 fp = fc_frame_alloc(lport, sizeof(struct fc_els_logo));
1483 kref_get(&rdata->kref);
1484 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_LOGO,
1485 fc_rport_logo_resp, rdata, 0))
1486 kref_put(&rdata->kref, fc_rport_destroy);
1490 * fc_rport_els_adisc_resp() - Handler for Address Discovery (ADISC) responses
1491 * @sp: The sequence the ADISC response was on
1492 * @fp: The ADISC response frame
1493 * @rdata_arg: The remote port that sent the ADISC response
1495 * Locking Note: This function will be called without the rport lock
1496 * held, but it will lock, call an _enter_* function or fc_rport_error
1497 * and then unlock the rport.
1499 static void fc_rport_adisc_resp(struct fc_seq *sp, struct fc_frame *fp,
1502 struct fc_rport_priv *rdata = rdata_arg;
1503 struct fc_els_adisc *adisc;
1506 FC_RPORT_DBG(rdata, "Received a ADISC response\n");
1508 if (fp == ERR_PTR(-FC_EX_CLOSED))
1511 mutex_lock(&rdata->rp_mutex);
1513 if (rdata->rp_state != RPORT_ST_ADISC) {
1514 FC_RPORT_DBG(rdata, "Received a ADISC resp but in state %s\n",
1515 fc_rport_state(rdata));
1522 fc_rport_error(rdata, PTR_ERR(fp));
1527 * If address verification failed. Consider us logged out of the rport.
1528 * Since the rport is still in discovery, we want to be
1529 * logged in, so go to PLOGI state. Otherwise, go back to READY.
1531 op = fc_frame_payload_op(fp);
1532 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1533 if (op != ELS_LS_ACC || !adisc ||
1534 ntoh24(adisc->adisc_port_id) != rdata->ids.port_id ||
1535 get_unaligned_be64(&adisc->adisc_wwpn) != rdata->ids.port_name ||
1536 get_unaligned_be64(&adisc->adisc_wwnn) != rdata->ids.node_name) {
1537 FC_RPORT_DBG(rdata, "ADISC error or mismatch\n");
1538 fc_rport_enter_flogi(rdata);
1540 FC_RPORT_DBG(rdata, "ADISC OK\n");
1541 fc_rport_enter_ready(rdata);
1546 mutex_unlock(&rdata->rp_mutex);
1548 kref_put(&rdata->kref, fc_rport_destroy);
1552 * fc_rport_enter_adisc() - Send Address Discover (ADISC) request
1553 * @rdata: The remote port to send the ADISC request to
1555 * Reference counting: increments kref when sending ELS
1557 static void fc_rport_enter_adisc(struct fc_rport_priv *rdata)
1559 struct fc_lport *lport = rdata->local_port;
1560 struct fc_frame *fp;
1562 lockdep_assert_held(&rdata->rp_mutex);
1564 FC_RPORT_DBG(rdata, "sending ADISC from %s state\n",
1565 fc_rport_state(rdata));
1567 fc_rport_state_enter(rdata, RPORT_ST_ADISC);
1569 fp = fc_frame_alloc(lport, sizeof(struct fc_els_adisc));
1571 fc_rport_error_retry(rdata, -FC_EX_ALLOC_ERR);
1574 kref_get(&rdata->kref);
1575 if (!lport->tt.elsct_send(lport, rdata->ids.port_id, fp, ELS_ADISC,
1576 fc_rport_adisc_resp, rdata,
1577 2 * lport->r_a_tov)) {
1578 fc_rport_error_retry(rdata, -FC_EX_XMIT_ERR);
1579 kref_put(&rdata->kref, fc_rport_destroy);
1584 * fc_rport_recv_adisc_req() - Handler for Address Discovery (ADISC) requests
1585 * @rdata: The remote port that sent the ADISC request
1586 * @in_fp: The ADISC request frame
1588 static void fc_rport_recv_adisc_req(struct fc_rport_priv *rdata,
1589 struct fc_frame *in_fp)
1591 struct fc_lport *lport = rdata->local_port;
1592 struct fc_frame *fp;
1593 struct fc_els_adisc *adisc;
1594 struct fc_seq_els_data rjt_data;
1596 lockdep_assert_held(&rdata->rp_mutex);
1597 lockdep_assert_held(&lport->lp_mutex);
1599 FC_RPORT_DBG(rdata, "Received ADISC request\n");
1601 adisc = fc_frame_payload_get(in_fp, sizeof(*adisc));
1603 rjt_data.reason = ELS_RJT_PROT;
1604 rjt_data.explan = ELS_EXPL_INV_LEN;
1605 fc_seq_els_rsp_send(in_fp, ELS_LS_RJT, &rjt_data);
1609 fp = fc_frame_alloc(lport, sizeof(*adisc));
1612 fc_adisc_fill(lport, fp);
1613 adisc = fc_frame_payload_get(fp, sizeof(*adisc));
1614 adisc->adisc_cmd = ELS_LS_ACC;
1615 fc_fill_reply_hdr(fp, in_fp, FC_RCTL_ELS_REP, 0);
1616 lport->tt.frame_send(lport, fp);
1618 fc_frame_free(in_fp);
1622 * fc_rport_recv_rls_req() - Handle received Read Link Status request
1623 * @rdata: The remote port that sent the RLS request
1624 * @rx_fp: The PRLI request frame
1626 static void fc_rport_recv_rls_req(struct fc_rport_priv *rdata,
1627 struct fc_frame *rx_fp)
1630 struct fc_lport *lport = rdata->local_port;
1631 struct fc_frame *fp;
1632 struct fc_els_rls *rls;
1633 struct fc_els_rls_resp *rsp;
1634 struct fc_els_lesb *lesb;
1635 struct fc_seq_els_data rjt_data;
1636 struct fc_host_statistics *hst;
1638 lockdep_assert_held(&rdata->rp_mutex);
1640 FC_RPORT_DBG(rdata, "Received RLS request while in state %s\n",
1641 fc_rport_state(rdata));
1643 rls = fc_frame_payload_get(rx_fp, sizeof(*rls));
1645 rjt_data.reason = ELS_RJT_PROT;
1646 rjt_data.explan = ELS_EXPL_INV_LEN;
1650 fp = fc_frame_alloc(lport, sizeof(*rsp));
1652 rjt_data.reason = ELS_RJT_UNAB;
1653 rjt_data.explan = ELS_EXPL_INSUF_RES;
1657 rsp = fc_frame_payload_get(fp, sizeof(*rsp));
1658 memset(rsp, 0, sizeof(*rsp));
1659 rsp->rls_cmd = ELS_LS_ACC;
1660 lesb = &rsp->rls_lesb;
1661 if (lport->tt.get_lesb) {
1662 /* get LESB from LLD if it supports it */
1663 lport->tt.get_lesb(lport, lesb);
1665 fc_get_host_stats(lport->host);
1666 hst = &lport->host_stats;
1667 lesb->lesb_link_fail = htonl(hst->link_failure_count);
1668 lesb->lesb_sync_loss = htonl(hst->loss_of_sync_count);
1669 lesb->lesb_sig_loss = htonl(hst->loss_of_signal_count);
1670 lesb->lesb_prim_err = htonl(hst->prim_seq_protocol_err_count);
1671 lesb->lesb_inv_word = htonl(hst->invalid_tx_word_count);
1672 lesb->lesb_inv_crc = htonl(hst->invalid_crc_count);
1675 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1676 lport->tt.frame_send(lport, fp);
1680 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
1682 fc_frame_free(rx_fp);
1686 * fc_rport_recv_els_req() - Handler for validated ELS requests
1687 * @lport: The local port that received the ELS request
1688 * @fp: The ELS request frame
1690 * Handle incoming ELS requests that require port login.
1691 * The ELS opcode has already been validated by the caller.
1693 * Reference counting: does not modify kref
1695 static void fc_rport_recv_els_req(struct fc_lport *lport, struct fc_frame *fp)
1697 struct fc_rport_priv *rdata;
1698 struct fc_seq_els_data els_data;
1700 lockdep_assert_held(&lport->lp_mutex);
1702 rdata = fc_rport_lookup(lport, fc_frame_sid(fp));
1704 FC_RPORT_ID_DBG(lport, fc_frame_sid(fp),
1705 "Received ELS 0x%02x from non-logged-in port\n",
1706 fc_frame_payload_op(fp));
1710 mutex_lock(&rdata->rp_mutex);
1712 switch (rdata->rp_state) {
1715 case RPORT_ST_READY:
1716 case RPORT_ST_ADISC:
1718 case RPORT_ST_PLOGI:
1719 if (fc_frame_payload_op(fp) == ELS_PRLI) {
1720 FC_RPORT_DBG(rdata, "Reject ELS PRLI "
1721 "while in state %s\n",
1722 fc_rport_state(rdata));
1723 mutex_unlock(&rdata->rp_mutex);
1724 kref_put(&rdata->kref, fc_rport_destroy);
1729 "Reject ELS 0x%02x while in state %s\n",
1730 fc_frame_payload_op(fp), fc_rport_state(rdata));
1731 mutex_unlock(&rdata->rp_mutex);
1732 kref_put(&rdata->kref, fc_rport_destroy);
1736 switch (fc_frame_payload_op(fp)) {
1738 fc_rport_recv_prli_req(rdata, fp);
1741 fc_rport_recv_prlo_req(rdata, fp);
1744 fc_rport_recv_adisc_req(rdata, fp);
1747 fc_seq_els_rsp_send(fp, ELS_RRQ, NULL);
1751 fc_seq_els_rsp_send(fp, ELS_REC, NULL);
1755 fc_rport_recv_rls_req(rdata, fp);
1758 fc_rport_recv_rtv_req(rdata, fp);
1761 fc_frame_free(fp); /* can't happen */
1765 mutex_unlock(&rdata->rp_mutex);
1766 kref_put(&rdata->kref, fc_rport_destroy);
1770 els_data.reason = ELS_RJT_UNAB;
1771 els_data.explan = ELS_EXPL_PLOGI_REQD;
1772 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1777 els_data.reason = ELS_RJT_BUSY;
1778 els_data.explan = ELS_EXPL_NONE;
1779 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1785 * fc_rport_recv_req() - Handler for requests
1786 * @lport: The local port that received the request
1787 * @fp: The request frame
1789 * Reference counting: does not modify kref
1791 void fc_rport_recv_req(struct fc_lport *lport, struct fc_frame *fp)
1793 struct fc_seq_els_data els_data;
1795 lockdep_assert_held(&lport->lp_mutex);
1798 * Handle FLOGI, PLOGI and LOGO requests separately, since they
1799 * don't require prior login.
1800 * Check for unsupported opcodes first and reject them.
1801 * For some ops, it would be incorrect to reject with "PLOGI required".
1803 switch (fc_frame_payload_op(fp)) {
1805 fc_rport_recv_flogi_req(lport, fp);
1808 fc_rport_recv_plogi_req(lport, fp);
1811 fc_rport_recv_logo_req(lport, fp);
1820 fc_rport_recv_els_req(lport, fp);
1823 els_data.reason = ELS_RJT_UNSUP;
1824 els_data.explan = ELS_EXPL_NONE;
1825 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &els_data);
1830 EXPORT_SYMBOL(fc_rport_recv_req);
1833 * fc_rport_recv_plogi_req() - Handler for Port Login (PLOGI) requests
1834 * @lport: The local port that received the PLOGI request
1835 * @rx_fp: The PLOGI request frame
1837 * Reference counting: increments kref on return
1839 static void fc_rport_recv_plogi_req(struct fc_lport *lport,
1840 struct fc_frame *rx_fp)
1842 struct fc_disc *disc;
1843 struct fc_rport_priv *rdata;
1844 struct fc_frame *fp = rx_fp;
1845 struct fc_els_flogi *pl;
1846 struct fc_seq_els_data rjt_data;
1849 lockdep_assert_held(&lport->lp_mutex);
1851 sid = fc_frame_sid(fp);
1853 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI request\n");
1855 pl = fc_frame_payload_get(fp, sizeof(*pl));
1857 FC_RPORT_ID_DBG(lport, sid, "Received PLOGI too short\n");
1858 rjt_data.reason = ELS_RJT_PROT;
1859 rjt_data.explan = ELS_EXPL_INV_LEN;
1863 disc = &lport->disc;
1864 mutex_lock(&disc->disc_mutex);
1865 rdata = fc_rport_create(lport, sid);
1867 mutex_unlock(&disc->disc_mutex);
1868 rjt_data.reason = ELS_RJT_UNAB;
1869 rjt_data.explan = ELS_EXPL_INSUF_RES;
1873 mutex_lock(&rdata->rp_mutex);
1874 mutex_unlock(&disc->disc_mutex);
1876 rdata->ids.port_name = get_unaligned_be64(&pl->fl_wwpn);
1877 rdata->ids.node_name = get_unaligned_be64(&pl->fl_wwnn);
1880 * If the rport was just created, possibly due to the incoming PLOGI,
1881 * set the state appropriately and accept the PLOGI.
1883 * If we had also sent a PLOGI, and if the received PLOGI is from a
1884 * higher WWPN, we accept it, otherwise an LS_RJT is sent with reason
1885 * "command already in progress".
1887 * XXX TBD: If the session was ready before, the PLOGI should result in
1888 * all outstanding exchanges being reset.
1890 switch (rdata->rp_state) {
1892 FC_RPORT_DBG(rdata, "Received PLOGI in INIT state\n");
1894 case RPORT_ST_PLOGI_WAIT:
1895 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI_WAIT state\n");
1897 case RPORT_ST_PLOGI:
1898 FC_RPORT_DBG(rdata, "Received PLOGI in PLOGI state\n");
1899 if (rdata->ids.port_name < lport->wwpn) {
1900 mutex_unlock(&rdata->rp_mutex);
1901 rjt_data.reason = ELS_RJT_INPROG;
1902 rjt_data.explan = ELS_EXPL_NONE;
1908 case RPORT_ST_READY:
1909 case RPORT_ST_ADISC:
1910 FC_RPORT_DBG(rdata, "Received PLOGI in logged-in state %d "
1911 "- ignored for now\n", rdata->rp_state);
1912 /* XXX TBD - should reset */
1914 case RPORT_ST_FLOGI:
1915 case RPORT_ST_DELETE:
1916 FC_RPORT_DBG(rdata, "Received PLOGI in state %s - send busy\n",
1917 fc_rport_state(rdata));
1918 mutex_unlock(&rdata->rp_mutex);
1919 rjt_data.reason = ELS_RJT_BUSY;
1920 rjt_data.explan = ELS_EXPL_NONE;
1923 if (!fc_rport_compatible_roles(lport, rdata)) {
1924 FC_RPORT_DBG(rdata, "Received PLOGI for incompatible role\n");
1925 mutex_unlock(&rdata->rp_mutex);
1926 rjt_data.reason = ELS_RJT_LOGIC;
1927 rjt_data.explan = ELS_EXPL_NONE;
1932 * Get session payload size from incoming PLOGI.
1934 rdata->maxframe_size = fc_plogi_get_maxframe(pl, lport->mfs);
1937 * Send LS_ACC. If this fails, the originator should retry.
1939 fp = fc_frame_alloc(lport, sizeof(*pl));
1943 fc_plogi_fill(lport, fp, ELS_LS_ACC);
1944 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
1945 lport->tt.frame_send(lport, fp);
1946 fc_rport_enter_prli(rdata);
1948 mutex_unlock(&rdata->rp_mutex);
1949 fc_frame_free(rx_fp);
1953 fc_seq_els_rsp_send(fp, ELS_LS_RJT, &rjt_data);
1958 * fc_rport_recv_prli_req() - Handler for process login (PRLI) requests
1959 * @rdata: The remote port that sent the PRLI request
1960 * @rx_fp: The PRLI request frame
1962 static void fc_rport_recv_prli_req(struct fc_rport_priv *rdata,
1963 struct fc_frame *rx_fp)
1965 struct fc_lport *lport = rdata->local_port;
1966 struct fc_frame *fp;
1968 struct fc_els_prli prli;
1969 struct fc_els_spp spp;
1971 struct fc_els_spp *rspp; /* request service param page */
1972 struct fc_els_spp *spp; /* response spp */
1975 enum fc_els_spp_resp resp;
1976 struct fc_seq_els_data rjt_data;
1977 struct fc4_prov *prov;
1979 lockdep_assert_held(&rdata->rp_mutex);
1981 FC_RPORT_DBG(rdata, "Received PRLI request while in state %s\n",
1982 fc_rport_state(rdata));
1984 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
1985 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
1988 plen = ntohs(pp->prli.prli_len);
1989 if ((plen % 4) != 0 || plen > len || plen < 16)
1993 plen = pp->prli.prli_spp_len;
1994 if ((plen % 4) != 0 || plen < sizeof(*spp) ||
1995 plen > len || len < sizeof(*pp) || plen < 12)
1999 fp = fc_frame_alloc(lport, len);
2001 rjt_data.reason = ELS_RJT_UNAB;
2002 rjt_data.explan = ELS_EXPL_INSUF_RES;
2005 pp = fc_frame_payload_get(fp, len);
2008 pp->prli.prli_cmd = ELS_LS_ACC;
2009 pp->prli.prli_spp_len = plen;
2010 pp->prli.prli_len = htons(len);
2011 len -= sizeof(struct fc_els_prli);
2014 * Go through all the service parameter pages and build
2015 * response. If plen indicates longer SPP than standard,
2016 * use that. The entire response has been pre-cleared above.
2019 mutex_lock(&fc_prov_mutex);
2020 while (len >= plen) {
2021 rdata->spp_type = rspp->spp_type;
2022 spp->spp_type = rspp->spp_type;
2023 spp->spp_type_ext = rspp->spp_type_ext;
2026 if (rspp->spp_type < FC_FC4_PROV_SIZE) {
2027 enum fc_els_spp_resp active = 0, passive = 0;
2029 prov = fc_active_prov[rspp->spp_type];
2031 active = prov->prli(rdata, plen, rspp, spp);
2032 prov = fc_passive_prov[rspp->spp_type];
2034 passive = prov->prli(rdata, plen, rspp, spp);
2035 if (!active || passive == FC_SPP_RESP_ACK)
2039 FC_RPORT_DBG(rdata, "PRLI rspp type %x "
2040 "active %x passive %x\n",
2041 rspp->spp_type, active, passive);
2044 if (spp->spp_flags & FC_SPP_EST_IMG_PAIR)
2045 resp |= FC_SPP_RESP_CONF;
2047 resp |= FC_SPP_RESP_INVL;
2049 spp->spp_flags |= resp;
2051 rspp = (struct fc_els_spp *)((char *)rspp + plen);
2052 spp = (struct fc_els_spp *)((char *)spp + plen);
2054 mutex_unlock(&fc_prov_mutex);
2057 * Send LS_ACC. If this fails, the originator should retry.
2059 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2060 lport->tt.frame_send(lport, fp);
2065 rjt_data.reason = ELS_RJT_PROT;
2066 rjt_data.explan = ELS_EXPL_INV_LEN;
2068 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2070 fc_frame_free(rx_fp);
2074 * fc_rport_recv_prlo_req() - Handler for process logout (PRLO) requests
2075 * @rdata: The remote port that sent the PRLO request
2076 * @rx_fp: The PRLO request frame
2078 static void fc_rport_recv_prlo_req(struct fc_rport_priv *rdata,
2079 struct fc_frame *rx_fp)
2081 struct fc_lport *lport = rdata->local_port;
2082 struct fc_frame *fp;
2084 struct fc_els_prlo prlo;
2085 struct fc_els_spp spp;
2087 struct fc_els_spp *rspp; /* request service param page */
2088 struct fc_els_spp *spp; /* response spp */
2091 struct fc_seq_els_data rjt_data;
2093 lockdep_assert_held(&rdata->rp_mutex);
2095 FC_RPORT_DBG(rdata, "Received PRLO request while in state %s\n",
2096 fc_rport_state(rdata));
2098 len = fr_len(rx_fp) - sizeof(struct fc_frame_header);
2099 pp = fc_frame_payload_get(rx_fp, sizeof(*pp));
2102 plen = ntohs(pp->prlo.prlo_len);
2110 fp = fc_frame_alloc(lport, len);
2112 rjt_data.reason = ELS_RJT_UNAB;
2113 rjt_data.explan = ELS_EXPL_INSUF_RES;
2117 pp = fc_frame_payload_get(fp, len);
2120 pp->prlo.prlo_cmd = ELS_LS_ACC;
2121 pp->prlo.prlo_obs = 0x10;
2122 pp->prlo.prlo_len = htons(len);
2124 spp->spp_type = rspp->spp_type;
2125 spp->spp_type_ext = rspp->spp_type_ext;
2126 spp->spp_flags = FC_SPP_RESP_ACK;
2128 fc_rport_enter_prli(rdata);
2130 fc_fill_reply_hdr(fp, rx_fp, FC_RCTL_ELS_REP, 0);
2131 lport->tt.frame_send(lport, fp);
2135 rjt_data.reason = ELS_RJT_PROT;
2136 rjt_data.explan = ELS_EXPL_INV_LEN;
2138 fc_seq_els_rsp_send(rx_fp, ELS_LS_RJT, &rjt_data);
2140 fc_frame_free(rx_fp);
2144 * fc_rport_recv_logo_req() - Handler for logout (LOGO) requests
2145 * @lport: The local port that received the LOGO request
2146 * @fp: The LOGO request frame
2148 * Reference counting: drops kref on return
2150 static void fc_rport_recv_logo_req(struct fc_lport *lport, struct fc_frame *fp)
2152 struct fc_rport_priv *rdata;
2155 lockdep_assert_held(&lport->lp_mutex);
2157 fc_seq_els_rsp_send(fp, ELS_LS_ACC, NULL);
2159 sid = fc_frame_sid(fp);
2161 rdata = fc_rport_lookup(lport, sid);
2163 mutex_lock(&rdata->rp_mutex);
2164 FC_RPORT_DBG(rdata, "Received LOGO request while in state %s\n",
2165 fc_rport_state(rdata));
2167 rdata->flags &= ~FC_RP_STARTED;
2168 fc_rport_enter_delete(rdata, RPORT_EV_STOP);
2169 mutex_unlock(&rdata->rp_mutex);
2170 kref_put(&rdata->kref, fc_rport_destroy);
2172 FC_RPORT_ID_DBG(lport, sid,
2173 "Received LOGO from non-logged-in port\n");
2178 * fc_rport_flush_queue() - Flush the rport_event_queue
2180 void fc_rport_flush_queue(void)
2182 flush_workqueue(rport_event_queue);
2184 EXPORT_SYMBOL(fc_rport_flush_queue);
2187 * fc_rport_fcp_prli() - Handle incoming PRLI for the FCP initiator.
2188 * @rdata: remote port private
2189 * @spp_len: service parameter page length
2190 * @rspp: received service parameter page
2191 * @spp: response service parameter page
2193 * Returns the value for the response code to be placed in spp_flags;
2194 * Returns 0 if not an initiator.
2196 static int fc_rport_fcp_prli(struct fc_rport_priv *rdata, u32 spp_len,
2197 const struct fc_els_spp *rspp,
2198 struct fc_els_spp *spp)
2200 struct fc_lport *lport = rdata->local_port;
2203 fcp_parm = ntohl(rspp->spp_params);
2204 rdata->ids.roles = FC_RPORT_ROLE_UNKNOWN;
2205 if (fcp_parm & FCP_SPPF_INIT_FCN)
2206 rdata->ids.roles |= FC_RPORT_ROLE_FCP_INITIATOR;
2207 if (fcp_parm & FCP_SPPF_TARG_FCN)
2208 rdata->ids.roles |= FC_RPORT_ROLE_FCP_TARGET;
2209 if (fcp_parm & FCP_SPPF_RETRY)
2210 rdata->flags |= FC_RP_FLAGS_RETRY;
2211 rdata->supported_classes = FC_COS_CLASS3;
2213 if (!(lport->service_params & FCP_SPPF_INIT_FCN))
2216 spp->spp_flags |= rspp->spp_flags & FC_SPP_EST_IMG_PAIR;
2219 * OR in our service parameters with other providers (target), if any.
2221 fcp_parm = ntohl(spp->spp_params);
2222 spp->spp_params = htonl(fcp_parm | lport->service_params);
2223 return FC_SPP_RESP_ACK;
2227 * FC-4 provider ops for FCP initiator.
2229 struct fc4_prov fc_rport_fcp_init = {
2230 .prli = fc_rport_fcp_prli,
2234 * fc_rport_t0_prli() - Handle incoming PRLI parameters for type 0
2235 * @rdata: remote port private
2236 * @spp_len: service parameter page length
2237 * @rspp: received service parameter page
2238 * @spp: response service parameter page
2240 static int fc_rport_t0_prli(struct fc_rport_priv *rdata, u32 spp_len,
2241 const struct fc_els_spp *rspp,
2242 struct fc_els_spp *spp)
2244 if (rspp->spp_flags & FC_SPP_EST_IMG_PAIR)
2245 return FC_SPP_RESP_INVL;
2246 return FC_SPP_RESP_ACK;
2250 * FC-4 provider ops for type 0 service parameters.
2252 * This handles the special case of type 0 which is always successful
2253 * but doesn't do anything otherwise.
2255 struct fc4_prov fc_rport_t0_prov = {
2256 .prli = fc_rport_t0_prli,
2260 * fc_setup_rport() - Initialize the rport_event_queue
2262 int fc_setup_rport(void)
2264 rport_event_queue = create_singlethread_workqueue("fc_rport_eq");
2265 if (!rport_event_queue)
2271 * fc_destroy_rport() - Destroy the rport_event_queue
2273 void fc_destroy_rport(void)
2275 destroy_workqueue(rport_event_queue);
2279 * fc_rport_terminate_io() - Stop all outstanding I/O on a remote port
2280 * @rport: The remote port whose I/O should be terminated
2282 void fc_rport_terminate_io(struct fc_rport *rport)
2284 struct fc_rport_libfc_priv *rpriv = rport->dd_data;
2285 struct fc_lport *lport = rpriv->local_port;
2287 lport->tt.exch_mgr_reset(lport, 0, rport->port_id);
2288 lport->tt.exch_mgr_reset(lport, rport->port_id, 0);
2290 EXPORT_SYMBOL(fc_rport_terminate_io);