2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
28 * The lport, disc and rport blocks all have mutexes that are used to protect
29 * those objects. The main motivation for these locks is to prevent from
30 * having an lport reset just before we send a frame. In that scenario the
31 * lport's FID would get set to zero and then we'd send a frame with an
32 * invalid SID. We also need to ensure that states don't change unexpectedly
33 * while processing another state.
37 * The following hierarchy defines the locking rules. A greater lock
38 * may be held before acquiring a lesser lock, but a lesser lock should never
39 * be held while attempting to acquire a greater lock. Here is the hierarchy-
41 * lport > disc, lport > rport, disc > rport
45 * The callbacks cause complications with this scheme. There is a callback
46 * from the rport (to either lport or disc) and a callback from disc
49 * As rports exit the rport state machine a callback is made to the owner of
50 * the rport to notify success or failure. Since the callback is likely to
51 * cause the lport or disc to grab its lock we cannot hold the rport lock
52 * while making the callback. To ensure that the rport is not free'd while
53 * processing the callback the rport callbacks are serialized through a
54 * single-threaded workqueue. An rport would never be free'd while in a
55 * callback handler becuase no other rport work in this queue can be executed
58 * When discovery succeeds or fails a callback is made to the lport as
59 * notification. Currently, successful discovery causes the lport to take no
60 * action. A failure will cause the lport to reset. There is likely a circular
61 * locking problem with this implementation.
67 * The critical sections protected by the lport's mutex are quite broad and
68 * may be improved upon in the future. The lport code and its locking doesn't
69 * influence the I/O path, so excessive locking doesn't penalize I/O
72 * The strategy is to lock whenever processing a request or response. Note
73 * that every _enter_* function corresponds to a state change. They generally
74 * change the lports state and then send a request out on the wire. We lock
75 * before calling any of these functions to protect that state change. This
76 * means that the entry points into the lport block manage the locks while
77 * the state machine can transition between states (i.e. _enter_* functions)
78 * while always staying protected.
80 * When handling responses we also hold the lport mutex broadly. When the
81 * lport receives the response frame it locks the mutex and then calls the
82 * appropriate handler for the particuar response. Generally a response will
83 * trigger a state change and so the lock must already be held.
85 * Retries also have to consider the locking. The retries occur from a work
86 * context and the work function will lock the lport and then retry the state
87 * (i.e. _enter_* function).
90 #include <linux/timer.h>
91 #include <linux/slab.h>
92 #include <asm/unaligned.h>
94 #include <scsi/fc/fc_gs.h>
96 #include <scsi/libfc.h>
97 #include <scsi/fc_encode.h>
98 #include <linux/scatterlist.h>
100 #include "fc_libfc.h"
102 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
103 #define FC_LOCAL_PTP_FID_LO 0x010101
104 #define FC_LOCAL_PTP_FID_HI 0x010102
106 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
108 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
110 static void fc_lport_enter_reset(struct fc_lport
*);
111 static void fc_lport_enter_flogi(struct fc_lport
*);
112 static void fc_lport_enter_dns(struct fc_lport
*);
113 static void fc_lport_enter_ns(struct fc_lport
*, enum fc_lport_state
);
114 static void fc_lport_enter_scr(struct fc_lport
*);
115 static void fc_lport_enter_ready(struct fc_lport
*);
116 static void fc_lport_enter_logo(struct fc_lport
*);
118 static const char *fc_lport_state_names
[] = {
119 [LPORT_ST_DISABLED
] = "disabled",
120 [LPORT_ST_FLOGI
] = "FLOGI",
121 [LPORT_ST_DNS
] = "dNS",
122 [LPORT_ST_RNN_ID
] = "RNN_ID",
123 [LPORT_ST_RSNN_NN
] = "RSNN_NN",
124 [LPORT_ST_RSPN_ID
] = "RSPN_ID",
125 [LPORT_ST_RFT_ID
] = "RFT_ID",
126 [LPORT_ST_RFF_ID
] = "RFF_ID",
127 [LPORT_ST_SCR
] = "SCR",
128 [LPORT_ST_READY
] = "Ready",
129 [LPORT_ST_LOGO
] = "LOGO",
130 [LPORT_ST_RESET
] = "reset",
134 * struct fc_bsg_info - FC Passthrough managemet structure
135 * @job: The passthrough job
136 * @lport: The local port to pass through a command
137 * @rsp_code: The expected response code
138 * @sg: job->reply_payload.sg_list
139 * @nents: job->reply_payload.sg_cnt
140 * @offset: The offset into the response data
143 struct fc_bsg_job
*job
;
144 struct fc_lport
*lport
;
146 struct scatterlist
*sg
;
152 * fc_frame_drop() - Dummy frame handler
153 * @lport: The local port the frame was received on
154 * @fp: The received frame
156 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
163 * fc_lport_rport_callback() - Event handler for rport events
164 * @lport: The lport which is receiving the event
165 * @rdata: private remote port data
166 * @event: The event that occured
168 * Locking Note: The rport lock should not be held when calling
171 static void fc_lport_rport_callback(struct fc_lport
*lport
,
172 struct fc_rport_priv
*rdata
,
173 enum fc_rport_event event
)
175 FC_LPORT_DBG(lport
, "Received a %d event for port (%6.6x)\n", event
,
178 mutex_lock(&lport
->lp_mutex
);
181 if (lport
->state
== LPORT_ST_DNS
) {
182 lport
->dns_rdata
= rdata
;
183 fc_lport_enter_ns(lport
, LPORT_ST_RNN_ID
);
185 FC_LPORT_DBG(lport
, "Received an READY event "
186 "on port (%6.6x) for the directory "
187 "server, but the lport is not "
188 "in the DNS state, it's in the "
189 "%d state", rdata
->ids
.port_id
,
191 lport
->tt
.rport_logoff(rdata
);
195 case RPORT_EV_FAILED
:
197 lport
->dns_rdata
= NULL
;
202 mutex_unlock(&lport
->lp_mutex
);
206 * fc_lport_state() - Return a string which represents the lport's state
207 * @lport: The lport whose state is to converted to a string
209 static const char *fc_lport_state(struct fc_lport
*lport
)
213 cp
= fc_lport_state_names
[lport
->state
];
220 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
221 * @lport: The lport to attach the ptp rport to
222 * @remote_fid: The FID of the ptp rport
223 * @remote_wwpn: The WWPN of the ptp rport
224 * @remote_wwnn: The WWNN of the ptp rport
226 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
227 u32 remote_fid
, u64 remote_wwpn
,
230 mutex_lock(&lport
->disc
.disc_mutex
);
231 if (lport
->ptp_rdata
) {
232 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
233 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
235 lport
->ptp_rdata
= lport
->tt
.rport_create(lport
, remote_fid
);
236 kref_get(&lport
->ptp_rdata
->kref
);
237 lport
->ptp_rdata
->ids
.port_name
= remote_wwpn
;
238 lport
->ptp_rdata
->ids
.node_name
= remote_wwnn
;
239 mutex_unlock(&lport
->disc
.disc_mutex
);
241 lport
->tt
.rport_login(lport
->ptp_rdata
);
243 fc_lport_enter_ready(lport
);
247 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
248 * @shost: The SCSI host whose port state is to be determined
250 void fc_get_host_port_state(struct Scsi_Host
*shost
)
252 struct fc_lport
*lport
= shost_priv(shost
);
254 mutex_lock(&lport
->lp_mutex
);
256 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
258 switch (lport
->state
) {
260 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
263 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
265 mutex_unlock(&lport
->lp_mutex
);
267 EXPORT_SYMBOL(fc_get_host_port_state
);
270 * fc_get_host_speed() - Return the speed of the given Scsi_Host
271 * @shost: The SCSI host whose port speed is to be determined
273 void fc_get_host_speed(struct Scsi_Host
*shost
)
275 struct fc_lport
*lport
= shost_priv(shost
);
277 fc_host_speed(shost
) = lport
->link_speed
;
279 EXPORT_SYMBOL(fc_get_host_speed
);
282 * fc_get_host_stats() - Return the Scsi_Host's statistics
283 * @shost: The SCSI host whose statistics are to be returned
285 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
287 struct fc_host_statistics
*fcoe_stats
;
288 struct fc_lport
*lport
= shost_priv(shost
);
289 struct timespec v0
, v1
;
292 fcoe_stats
= &lport
->host_stats
;
293 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
295 jiffies_to_timespec(jiffies
, &v0
);
296 jiffies_to_timespec(lport
->boot_time
, &v1
);
297 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
299 for_each_possible_cpu(cpu
) {
300 struct fcoe_dev_stats
*stats
;
302 stats
= per_cpu_ptr(lport
->dev_stats
, cpu
);
304 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
305 fcoe_stats
->tx_words
+= stats
->TxWords
;
306 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
307 fcoe_stats
->rx_words
+= stats
->RxWords
;
308 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
309 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
310 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
311 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
312 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
313 fcoe_stats
->fcp_input_megabytes
+= stats
->InputMegabytes
;
314 fcoe_stats
->fcp_output_megabytes
+= stats
->OutputMegabytes
;
315 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
317 fcoe_stats
->lip_count
= -1;
318 fcoe_stats
->nos_count
= -1;
319 fcoe_stats
->loss_of_sync_count
= -1;
320 fcoe_stats
->loss_of_signal_count
= -1;
321 fcoe_stats
->prim_seq_protocol_err_count
= -1;
322 fcoe_stats
->dumped_frames
= -1;
325 EXPORT_SYMBOL(fc_get_host_stats
);
328 * fc_lport_flogi_fill() - Fill in FLOGI command for request
329 * @lport: The local port the FLOGI is for
330 * @flogi: The FLOGI command
333 static void fc_lport_flogi_fill(struct fc_lport
*lport
,
334 struct fc_els_flogi
*flogi
,
337 struct fc_els_csp
*sp
;
338 struct fc_els_cssp
*cp
;
340 memset(flogi
, 0, sizeof(*flogi
));
341 flogi
->fl_cmd
= (u8
) op
;
342 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
343 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
345 sp
->sp_hi_ver
= 0x20;
346 sp
->sp_lo_ver
= 0x20;
347 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
348 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
349 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
350 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
351 if (op
!= ELS_FLOGI
) {
352 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
353 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
354 sp
->sp_rel_off
= htons(0x1f);
355 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
357 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
358 cp
->cp_con_seq
= htons(255);
364 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
365 * @lport: The local port to add a new FC-4 type to
366 * @type: The new FC-4 type
368 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
372 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
373 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
377 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
378 * @lport: Fibre Channel local port recieving the RLIR
379 * @fp: The RLIR request frame
381 * Locking Note: The lport lock is expected to be held before calling
384 static void fc_lport_recv_rlir_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
386 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
387 fc_lport_state(lport
));
389 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
394 * fc_lport_recv_echo_req() - Handle received ECHO request
395 * @lport: The local port recieving the ECHO
396 * @fp: ECHO request frame
398 * Locking Note: The lport lock is expected to be held before calling
401 static void fc_lport_recv_echo_req(struct fc_lport
*lport
,
402 struct fc_frame
*in_fp
)
409 FC_LPORT_DBG(lport
, "Received ECHO request while in state %s\n",
410 fc_lport_state(lport
));
412 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
413 pp
= fc_frame_payload_get(in_fp
, len
);
415 if (len
< sizeof(__be32
))
416 len
= sizeof(__be32
);
418 fp
= fc_frame_alloc(lport
, len
);
420 dp
= fc_frame_payload_get(fp
, len
);
422 *((__be32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
423 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
424 lport
->tt
.frame_send(lport
, fp
);
426 fc_frame_free(in_fp
);
430 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
431 * @lport: The local port recieving the RNID
432 * @fp: The RNID request frame
434 * Locking Note: The lport lock is expected to be held before calling
437 static void fc_lport_recv_rnid_req(struct fc_lport
*lport
,
438 struct fc_frame
*in_fp
)
441 struct fc_els_rnid
*req
;
443 struct fc_els_rnid_resp rnid
;
444 struct fc_els_rnid_cid cid
;
445 struct fc_els_rnid_gen gen
;
447 struct fc_seq_els_data rjt_data
;
451 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
452 fc_lport_state(lport
));
454 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
456 rjt_data
.reason
= ELS_RJT_LOGIC
;
457 rjt_data
.explan
= ELS_EXPL_NONE
;
458 lport
->tt
.seq_els_rsp_send(in_fp
, ELS_LS_RJT
, &rjt_data
);
462 if (fmt
!= ELS_RNIDF_GEN
||
463 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
464 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
465 len
-= sizeof(rp
->gen
);
467 fp
= fc_frame_alloc(lport
, len
);
469 rp
= fc_frame_payload_get(fp
, len
);
471 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
472 rp
->rnid
.rnid_fmt
= fmt
;
473 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
474 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
475 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
476 if (fmt
== ELS_RNIDF_GEN
) {
477 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
478 memcpy(&rp
->gen
, &lport
->rnid_gen
,
481 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
482 lport
->tt
.frame_send(lport
, fp
);
485 fc_frame_free(in_fp
);
489 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
490 * @lport: The local port recieving the LOGO
491 * @fp: The LOGO request frame
493 * Locking Note: The lport lock is exected to be held before calling
496 static void fc_lport_recv_logo_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
498 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
499 fc_lport_enter_reset(lport
);
504 * fc_fabric_login() - Start the lport state machine
505 * @lport: The local port that should log into the fabric
507 * Locking Note: This function should not be called
508 * with the lport lock held.
510 int fc_fabric_login(struct fc_lport
*lport
)
514 mutex_lock(&lport
->lp_mutex
);
515 if (lport
->state
== LPORT_ST_DISABLED
||
516 lport
->state
== LPORT_ST_LOGO
) {
517 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
518 fc_lport_enter_reset(lport
);
521 mutex_unlock(&lport
->lp_mutex
);
525 EXPORT_SYMBOL(fc_fabric_login
);
528 * __fc_linkup() - Handler for transport linkup events
529 * @lport: The lport whose link is up
531 * Locking: must be called with the lp_mutex held
533 void __fc_linkup(struct fc_lport
*lport
)
535 if (!lport
->link_up
) {
538 if (lport
->state
== LPORT_ST_RESET
)
539 fc_lport_enter_flogi(lport
);
544 * fc_linkup() - Handler for transport linkup events
545 * @lport: The local port whose link is up
547 void fc_linkup(struct fc_lport
*lport
)
549 printk(KERN_INFO
"host%d: libfc: Link up on port (%6.6x)\n",
550 lport
->host
->host_no
, lport
->port_id
);
552 mutex_lock(&lport
->lp_mutex
);
554 mutex_unlock(&lport
->lp_mutex
);
556 EXPORT_SYMBOL(fc_linkup
);
559 * __fc_linkdown() - Handler for transport linkdown events
560 * @lport: The lport whose link is down
562 * Locking: must be called with the lp_mutex held
564 void __fc_linkdown(struct fc_lport
*lport
)
566 if (lport
->link_up
) {
568 fc_lport_enter_reset(lport
);
569 lport
->tt
.fcp_cleanup(lport
);
574 * fc_linkdown() - Handler for transport linkdown events
575 * @lport: The local port whose link is down
577 void fc_linkdown(struct fc_lport
*lport
)
579 printk(KERN_INFO
"host%d: libfc: Link down on port (%6.6x)\n",
580 lport
->host
->host_no
, lport
->port_id
);
582 mutex_lock(&lport
->lp_mutex
);
583 __fc_linkdown(lport
);
584 mutex_unlock(&lport
->lp_mutex
);
586 EXPORT_SYMBOL(fc_linkdown
);
589 * fc_fabric_logoff() - Logout of the fabric
590 * @lport: The local port to logoff the fabric
593 * 0 for success, -1 for failure
595 int fc_fabric_logoff(struct fc_lport
*lport
)
597 lport
->tt
.disc_stop_final(lport
);
598 mutex_lock(&lport
->lp_mutex
);
599 if (lport
->dns_rdata
)
600 lport
->tt
.rport_logoff(lport
->dns_rdata
);
601 mutex_unlock(&lport
->lp_mutex
);
602 lport
->tt
.rport_flush_queue();
603 mutex_lock(&lport
->lp_mutex
);
604 fc_lport_enter_logo(lport
);
605 mutex_unlock(&lport
->lp_mutex
);
606 cancel_delayed_work_sync(&lport
->retry_work
);
609 EXPORT_SYMBOL(fc_fabric_logoff
);
612 * fc_lport_destroy() - Unregister a fc_lport
613 * @lport: The local port to unregister
616 * exit routine for fc_lport instance
617 * clean-up all the allocated memory
618 * and free up other system resources.
621 int fc_lport_destroy(struct fc_lport
*lport
)
623 mutex_lock(&lport
->lp_mutex
);
624 lport
->state
= LPORT_ST_DISABLED
;
626 lport
->tt
.frame_send
= fc_frame_drop
;
627 mutex_unlock(&lport
->lp_mutex
);
629 lport
->tt
.fcp_abort_io(lport
);
630 lport
->tt
.disc_stop_final(lport
);
631 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
634 EXPORT_SYMBOL(fc_lport_destroy
);
637 * fc_set_mfs() - Set the maximum frame size for a local port
638 * @lport: The local port to set the MFS for
641 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
643 unsigned int old_mfs
;
646 mutex_lock(&lport
->lp_mutex
);
648 old_mfs
= lport
->mfs
;
650 if (mfs
>= FC_MIN_MAX_FRAME
) {
652 if (mfs
> FC_MAX_FRAME
)
654 mfs
-= sizeof(struct fc_frame_header
);
659 if (!rc
&& mfs
< old_mfs
)
660 fc_lport_enter_reset(lport
);
662 mutex_unlock(&lport
->lp_mutex
);
666 EXPORT_SYMBOL(fc_set_mfs
);
669 * fc_lport_disc_callback() - Callback for discovery events
670 * @lport: The local port receiving the event
671 * @event: The discovery event
673 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
676 case DISC_EV_SUCCESS
:
677 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
680 printk(KERN_ERR
"host%d: libfc: "
681 "Discovery failed for port (%6.6x)\n",
682 lport
->host
->host_no
, lport
->port_id
);
683 mutex_lock(&lport
->lp_mutex
);
684 fc_lport_enter_reset(lport
);
685 mutex_unlock(&lport
->lp_mutex
);
694 * fc_rport_enter_ready() - Enter the ready state and start discovery
695 * @lport: The local port that is ready
697 * Locking Note: The lport lock is expected to be held before calling
700 static void fc_lport_enter_ready(struct fc_lport
*lport
)
702 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
703 fc_lport_state(lport
));
705 fc_lport_state_enter(lport
, LPORT_ST_READY
);
707 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
708 fc_vports_linkchange(lport
);
710 if (!lport
->ptp_rdata
)
711 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
715 * fc_lport_set_port_id() - set the local port Port ID
716 * @lport: The local port which will have its Port ID set.
717 * @port_id: The new port ID.
718 * @fp: The frame containing the incoming request, or NULL.
720 * Locking Note: The lport lock is expected to be held before calling
723 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
727 printk(KERN_INFO
"host%d: Assigned Port ID %6.6x\n",
728 lport
->host
->host_no
, port_id
);
730 lport
->port_id
= port_id
;
732 /* Update the fc_host */
733 fc_host_port_id(lport
->host
) = port_id
;
735 if (lport
->tt
.lport_set_port_id
)
736 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
740 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
741 * @lport: The local port which will have its Port ID set.
742 * @port_id: The new port ID.
744 * Called by the lower-level driver when transport sets the local port_id.
745 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
746 * discovery to be skipped.
748 void fc_lport_set_local_id(struct fc_lport
*lport
, u32 port_id
)
750 mutex_lock(&lport
->lp_mutex
);
752 fc_lport_set_port_id(lport
, port_id
, NULL
);
754 switch (lport
->state
) {
758 fc_lport_enter_ready(lport
);
763 mutex_unlock(&lport
->lp_mutex
);
765 EXPORT_SYMBOL(fc_lport_set_local_id
);
768 * fc_lport_recv_flogi_req() - Receive a FLOGI request
769 * @lport: The local port that recieved the request
770 * @rx_fp: The FLOGI frame
772 * A received FLOGI request indicates a point-to-point connection.
773 * Accept it with the common service parameters indicating our N port.
774 * Set up to do a PLOGI if we have the higher-number WWPN.
776 * Locking Note: The lport lock is expected to be held before calling
779 static void fc_lport_recv_flogi_req(struct fc_lport
*lport
,
780 struct fc_frame
*rx_fp
)
783 struct fc_frame_header
*fh
;
784 struct fc_els_flogi
*flp
;
785 struct fc_els_flogi
*new_flp
;
790 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
791 fc_lport_state(lport
));
793 remote_fid
= fc_frame_sid(rx_fp
);
794 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
797 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
798 if (remote_wwpn
== lport
->wwpn
) {
799 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
800 "with same WWPN %16.16llx\n",
801 lport
->host
->host_no
, remote_wwpn
);
804 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
807 * XXX what is the right thing to do for FIDs?
808 * The originator might expect our S_ID to be 0xfffffe.
809 * But if so, both of us could end up with the same FID.
811 local_fid
= FC_LOCAL_PTP_FID_LO
;
812 if (remote_wwpn
< lport
->wwpn
) {
813 local_fid
= FC_LOCAL_PTP_FID_HI
;
814 if (!remote_fid
|| remote_fid
== local_fid
)
815 remote_fid
= FC_LOCAL_PTP_FID_LO
;
816 } else if (!remote_fid
) {
817 remote_fid
= FC_LOCAL_PTP_FID_HI
;
820 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
822 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
824 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
825 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
826 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
829 * Send the response. If this fails, the originator should
830 * repeat the sequence.
832 fc_fill_reply_hdr(fp
, rx_fp
, FC_RCTL_ELS_REP
, 0);
833 fh
= fc_frame_header_get(fp
);
834 hton24(fh
->fh_s_id
, local_fid
);
835 hton24(fh
->fh_d_id
, remote_fid
);
836 lport
->tt
.frame_send(lport
, fp
);
839 fc_lport_error(lport
, fp
);
841 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
842 get_unaligned_be64(&flp
->fl_wwnn
));
844 fc_frame_free(rx_fp
);
848 * fc_lport_recv_req() - The generic lport request handler
849 * @lport: The local port that received the request
850 * @fp: The request frame
852 * This function will see if the lport handles the request or
853 * if an rport should handle the request.
855 * Locking Note: This function should not be called with the lport
856 * lock held becuase it will grab the lock.
858 static void fc_lport_recv_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
860 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
861 void (*recv
)(struct fc_lport
*, struct fc_frame
*);
863 mutex_lock(&lport
->lp_mutex
);
866 * Handle special ELS cases like FLOGI, LOGO, and
867 * RSCN here. These don't require a session.
868 * Even if we had a session, it might not be ready.
872 else if (fh
->fh_type
== FC_TYPE_ELS
&&
873 fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
877 recv
= lport
->tt
.rport_recv_req
;
878 switch (fc_frame_payload_op(fp
)) {
880 if (!lport
->point_to_multipoint
)
881 recv
= fc_lport_recv_flogi_req
;
884 if (fc_frame_sid(fp
) == FC_FID_FLOGI
)
885 recv
= fc_lport_recv_logo_req
;
888 recv
= lport
->tt
.disc_recv_req
;
891 recv
= fc_lport_recv_echo_req
;
894 recv
= fc_lport_recv_rlir_req
;
897 recv
= fc_lport_recv_rnid_req
;
903 FC_LPORT_DBG(lport
, "dropping invalid frame (eof %x)\n",
907 mutex_unlock(&lport
->lp_mutex
);
911 * fc_lport_reset() - Reset a local port
912 * @lport: The local port which should be reset
914 * Locking Note: This functions should not be called with the
917 int fc_lport_reset(struct fc_lport
*lport
)
919 cancel_delayed_work_sync(&lport
->retry_work
);
920 mutex_lock(&lport
->lp_mutex
);
921 fc_lport_enter_reset(lport
);
922 mutex_unlock(&lport
->lp_mutex
);
925 EXPORT_SYMBOL(fc_lport_reset
);
928 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
929 * @lport: The local port to be reset
931 * Locking Note: The lport lock is expected to be held before calling
934 static void fc_lport_reset_locked(struct fc_lport
*lport
)
936 if (lport
->dns_rdata
)
937 lport
->tt
.rport_logoff(lport
->dns_rdata
);
939 if (lport
->ptp_rdata
) {
940 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
941 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
942 lport
->ptp_rdata
= NULL
;
945 lport
->tt
.disc_stop(lport
);
947 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
948 fc_host_fabric_name(lport
->host
) = 0;
950 if (lport
->port_id
&& (!lport
->point_to_multipoint
|| !lport
->link_up
))
951 fc_lport_set_port_id(lport
, 0, NULL
);
955 * fc_lport_enter_reset() - Reset the local port
956 * @lport: The local port to be reset
958 * Locking Note: The lport lock is expected to be held before calling
961 static void fc_lport_enter_reset(struct fc_lport
*lport
)
963 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
964 fc_lport_state(lport
));
966 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
971 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
973 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
975 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
976 fc_vports_linkchange(lport
);
977 fc_lport_reset_locked(lport
);
979 fc_lport_enter_flogi(lport
);
983 * fc_lport_enter_disabled() - Disable the local port
984 * @lport: The local port to be reset
986 * Locking Note: The lport lock is expected to be held before calling
989 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
991 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
992 fc_lport_state(lport
));
994 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
995 fc_vports_linkchange(lport
);
996 fc_lport_reset_locked(lport
);
1000 * fc_lport_error() - Handler for any errors
1001 * @lport: The local port that the error was on
1002 * @fp: The error code encoded in a frame pointer
1004 * If the error was caused by a resource allocation failure
1005 * then wait for half a second and retry, otherwise retry
1006 * after the e_d_tov time.
1008 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1010 unsigned long delay
= 0;
1011 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1012 PTR_ERR(fp
), fc_lport_state(lport
),
1013 lport
->retry_count
);
1015 if (PTR_ERR(fp
) == -FC_EX_CLOSED
)
1019 * Memory allocation failure, or the exchange timed out
1020 * or we received LS_RJT.
1023 if (lport
->retry_count
< lport
->max_retry_count
) {
1024 lport
->retry_count
++;
1026 delay
= msecs_to_jiffies(500);
1028 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1030 schedule_delayed_work(&lport
->retry_work
, delay
);
1032 fc_lport_enter_reset(lport
);
1036 * fc_lport_ns_resp() - Handle response to a name server
1037 * registration exchange
1038 * @sp: current sequence in exchange
1039 * @fp: response frame
1040 * @lp_arg: Fibre Channel host port instance
1042 * Locking Note: This function will be called without the lport lock
1043 * held, but it will lock, call an _enter_* function or fc_lport_error()
1044 * and then unlock the lport.
1046 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1049 struct fc_lport
*lport
= lp_arg
;
1050 struct fc_frame_header
*fh
;
1051 struct fc_ct_hdr
*ct
;
1053 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1055 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1058 mutex_lock(&lport
->lp_mutex
);
1060 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1061 FC_LPORT_DBG(lport
, "Received a name server response, "
1062 "but in state %s\n", fc_lport_state(lport
));
1069 fc_lport_error(lport
, fp
);
1073 fh
= fc_frame_header_get(fp
);
1074 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1076 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1077 ct
->ct_fs_type
== FC_FST_DIR
&&
1078 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1079 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1080 switch (lport
->state
) {
1081 case LPORT_ST_RNN_ID
:
1082 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1084 case LPORT_ST_RSNN_NN
:
1085 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1087 case LPORT_ST_RSPN_ID
:
1088 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1090 case LPORT_ST_RFT_ID
:
1091 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1093 case LPORT_ST_RFF_ID
:
1094 fc_lport_enter_scr(lport
);
1097 /* should have already been caught by state checks */
1101 fc_lport_error(lport
, fp
);
1105 mutex_unlock(&lport
->lp_mutex
);
1109 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1110 * @sp: current sequence in SCR exchange
1111 * @fp: response frame
1112 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1114 * Locking Note: This function will be called without the lport lock
1115 * held, but it will lock, call an _enter_* function or fc_lport_error
1116 * and then unlock the lport.
1118 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1121 struct fc_lport
*lport
= lp_arg
;
1124 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1126 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1129 mutex_lock(&lport
->lp_mutex
);
1131 if (lport
->state
!= LPORT_ST_SCR
) {
1132 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1133 "%s\n", fc_lport_state(lport
));
1140 fc_lport_error(lport
, fp
);
1144 op
= fc_frame_payload_op(fp
);
1145 if (op
== ELS_LS_ACC
)
1146 fc_lport_enter_ready(lport
);
1148 fc_lport_error(lport
, fp
);
1153 mutex_unlock(&lport
->lp_mutex
);
1157 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1158 * @lport: The local port to register for state changes
1160 * Locking Note: The lport lock is expected to be held before calling
1163 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1165 struct fc_frame
*fp
;
1167 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1168 fc_lport_state(lport
));
1170 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1172 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1174 fc_lport_error(lport
, fp
);
1178 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1179 fc_lport_scr_resp
, lport
,
1180 2 * lport
->r_a_tov
))
1181 fc_lport_error(lport
, NULL
);
1185 * fc_lport_enter_ns() - register some object with the name server
1186 * @lport: Fibre Channel local port to register
1188 * Locking Note: The lport lock is expected to be held before calling
1191 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1193 struct fc_frame
*fp
;
1195 int size
= sizeof(struct fc_ct_hdr
);
1198 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1199 fc_lport_state_names
[state
],
1200 fc_lport_state(lport
));
1202 fc_lport_state_enter(lport
, state
);
1205 case LPORT_ST_RNN_ID
:
1207 size
+= sizeof(struct fc_ns_rn_id
);
1209 case LPORT_ST_RSNN_NN
:
1210 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1211 /* if there is no symbolic name, skip to RFT_ID */
1213 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1214 cmd
= FC_NS_RSNN_NN
;
1215 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1217 case LPORT_ST_RSPN_ID
:
1218 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1219 /* if there is no symbolic name, skip to RFT_ID */
1221 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1222 cmd
= FC_NS_RSPN_ID
;
1223 size
+= sizeof(struct fc_ns_rspn
) + len
;
1225 case LPORT_ST_RFT_ID
:
1227 size
+= sizeof(struct fc_ns_rft
);
1229 case LPORT_ST_RFF_ID
:
1231 size
+= sizeof(struct fc_ns_rff_id
);
1234 fc_lport_error(lport
, NULL
);
1238 fp
= fc_frame_alloc(lport
, size
);
1240 fc_lport_error(lport
, fp
);
1244 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1246 lport
, 3 * lport
->r_a_tov
))
1247 fc_lport_error(lport
, fp
);
1250 static struct fc_rport_operations fc_lport_rport_ops
= {
1251 .event_callback
= fc_lport_rport_callback
,
1255 * fc_rport_enter_dns() - Create a fc_rport for the name server
1256 * @lport: The local port requesting a remote port for the name server
1258 * Locking Note: The lport lock is expected to be held before calling
1261 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1263 struct fc_rport_priv
*rdata
;
1265 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1266 fc_lport_state(lport
));
1268 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1270 mutex_lock(&lport
->disc
.disc_mutex
);
1271 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1272 mutex_unlock(&lport
->disc
.disc_mutex
);
1276 rdata
->ops
= &fc_lport_rport_ops
;
1277 lport
->tt
.rport_login(rdata
);
1281 fc_lport_error(lport
, NULL
);
1285 * fc_lport_timeout() - Handler for the retry_work timer
1286 * @work: The work struct of the local port
1288 static void fc_lport_timeout(struct work_struct
*work
)
1290 struct fc_lport
*lport
=
1291 container_of(work
, struct fc_lport
,
1294 mutex_lock(&lport
->lp_mutex
);
1296 switch (lport
->state
) {
1297 case LPORT_ST_DISABLED
:
1300 case LPORT_ST_READY
:
1303 case LPORT_ST_RESET
:
1305 case LPORT_ST_FLOGI
:
1306 fc_lport_enter_flogi(lport
);
1309 fc_lport_enter_dns(lport
);
1311 case LPORT_ST_RNN_ID
:
1312 case LPORT_ST_RSNN_NN
:
1313 case LPORT_ST_RSPN_ID
:
1314 case LPORT_ST_RFT_ID
:
1315 case LPORT_ST_RFF_ID
:
1316 fc_lport_enter_ns(lport
, lport
->state
);
1319 fc_lport_enter_scr(lport
);
1322 fc_lport_enter_logo(lport
);
1326 mutex_unlock(&lport
->lp_mutex
);
1330 * fc_lport_logo_resp() - Handle response to LOGO request
1331 * @sp: The sequence that the LOGO was on
1332 * @fp: The LOGO frame
1333 * @lp_arg: The lport port that received the LOGO request
1335 * Locking Note: This function will be called without the lport lock
1336 * held, but it will lock, call an _enter_* function or fc_lport_error()
1337 * and then unlock the lport.
1339 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1342 struct fc_lport
*lport
= lp_arg
;
1345 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1347 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1350 mutex_lock(&lport
->lp_mutex
);
1352 if (lport
->state
!= LPORT_ST_LOGO
) {
1353 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1354 "%s\n", fc_lport_state(lport
));
1361 fc_lport_error(lport
, fp
);
1365 op
= fc_frame_payload_op(fp
);
1366 if (op
== ELS_LS_ACC
)
1367 fc_lport_enter_disabled(lport
);
1369 fc_lport_error(lport
, fp
);
1374 mutex_unlock(&lport
->lp_mutex
);
1376 EXPORT_SYMBOL(fc_lport_logo_resp
);
1379 * fc_rport_enter_logo() - Logout of the fabric
1380 * @lport: The local port to be logged out
1382 * Locking Note: The lport lock is expected to be held before calling
1385 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1387 struct fc_frame
*fp
;
1388 struct fc_els_logo
*logo
;
1390 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1391 fc_lport_state(lport
));
1393 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1394 fc_vports_linkchange(lport
);
1396 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1398 fc_lport_error(lport
, fp
);
1402 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1403 fc_lport_logo_resp
, lport
,
1404 2 * lport
->r_a_tov
))
1405 fc_lport_error(lport
, NULL
);
1409 * fc_lport_flogi_resp() - Handle response to FLOGI request
1410 * @sp: The sequence that the FLOGI was on
1411 * @fp: The FLOGI response frame
1412 * @lp_arg: The lport port that received the FLOGI response
1414 * Locking Note: This function will be called without the lport lock
1415 * held, but it will lock, call an _enter_* function or fc_lport_error()
1416 * and then unlock the lport.
1418 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1421 struct fc_lport
*lport
= lp_arg
;
1422 struct fc_els_flogi
*flp
;
1425 unsigned int r_a_tov
;
1426 unsigned int e_d_tov
;
1429 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1431 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1434 mutex_lock(&lport
->lp_mutex
);
1436 if (lport
->state
!= LPORT_ST_FLOGI
) {
1437 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1438 "%s\n", fc_lport_state(lport
));
1445 fc_lport_error(lport
, fp
);
1449 did
= fc_frame_did(fp
);
1452 FC_LPORT_DBG(lport
, "Bad FLOGI response\n");
1456 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
) {
1457 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1459 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1461 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1464 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1465 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1466 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1467 if (csp_flags
& FC_SP_FT_EDTR
)
1470 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1472 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1473 if (e_d_tov
> lport
->e_d_tov
)
1474 lport
->e_d_tov
= e_d_tov
;
1475 lport
->r_a_tov
= 2 * e_d_tov
;
1476 fc_lport_set_port_id(lport
, did
, fp
);
1477 printk(KERN_INFO
"host%d: libfc: "
1478 "Port (%6.6x) entered "
1479 "point-to-point mode\n",
1480 lport
->host
->host_no
, did
);
1481 fc_lport_ptp_setup(lport
, fc_frame_sid(fp
),
1487 lport
->e_d_tov
= e_d_tov
;
1488 lport
->r_a_tov
= r_a_tov
;
1489 fc_host_fabric_name(lport
->host
) =
1490 get_unaligned_be64(&flp
->fl_wwnn
);
1491 fc_lport_set_port_id(lport
, did
, fp
);
1492 fc_lport_enter_dns(lport
);
1496 fc_lport_error(lport
, fp
);
1501 mutex_unlock(&lport
->lp_mutex
);
1503 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1506 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1507 * @lport: Fibre Channel local port to be logged in to the fabric
1509 * Locking Note: The lport lock is expected to be held before calling
1512 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1514 struct fc_frame
*fp
;
1516 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1517 fc_lport_state(lport
));
1519 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1521 if (lport
->point_to_multipoint
) {
1523 fc_lport_enter_ready(lport
);
1527 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1529 return fc_lport_error(lport
, fp
);
1531 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1532 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1533 fc_lport_flogi_resp
, lport
,
1534 lport
->vport
? 2 * lport
->r_a_tov
:
1536 fc_lport_error(lport
, NULL
);
1540 * fc_lport_config() - Configure a fc_lport
1541 * @lport: The local port to be configured
1543 int fc_lport_config(struct fc_lport
*lport
)
1545 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1546 mutex_init(&lport
->lp_mutex
);
1548 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1550 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1551 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1555 EXPORT_SYMBOL(fc_lport_config
);
1558 * fc_lport_init() - Initialize the lport layer for a local port
1559 * @lport: The local port to initialize the exchange layer for
1561 int fc_lport_init(struct fc_lport
*lport
)
1563 if (!lport
->tt
.lport_recv
)
1564 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1566 if (!lport
->tt
.lport_reset
)
1567 lport
->tt
.lport_reset
= fc_lport_reset
;
1569 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1570 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1571 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1572 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1573 memset(fc_host_supported_fc4s(lport
->host
), 0,
1574 sizeof(fc_host_supported_fc4s(lport
->host
)));
1575 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1576 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1578 /* This value is also unchanging */
1579 memset(fc_host_active_fc4s(lport
->host
), 0,
1580 sizeof(fc_host_active_fc4s(lport
->host
)));
1581 fc_host_active_fc4s(lport
->host
)[2] = 1;
1582 fc_host_active_fc4s(lport
->host
)[7] = 1;
1583 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1584 fc_host_supported_speeds(lport
->host
) = 0;
1585 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1586 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1587 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1588 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1592 EXPORT_SYMBOL(fc_lport_init
);
1595 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1596 * @sp: The sequence for the FC Passthrough response
1597 * @fp: The response frame
1598 * @info_arg: The BSG info that the response is for
1600 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1603 struct fc_bsg_info
*info
= info_arg
;
1604 struct fc_bsg_job
*job
= info
->job
;
1605 struct fc_lport
*lport
= info
->lport
;
1606 struct fc_frame_header
*fh
;
1611 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1612 -ECONNABORTED
: -ETIMEDOUT
;
1613 job
->reply_len
= sizeof(uint32_t);
1614 job
->state_flags
|= FC_RQST_STATE_DONE
;
1620 mutex_lock(&lport
->lp_mutex
);
1621 fh
= fc_frame_header_get(fp
);
1622 len
= fr_len(fp
) - sizeof(*fh
);
1623 buf
= fc_frame_payload_get(fp
, 0);
1625 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1626 /* Get the response code from the first frame payload */
1627 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1628 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1629 (unsigned short)fc_frame_payload_op(fp
);
1631 /* Save the reply status of the job */
1632 job
->reply
->reply_data
.ctels_reply
.status
=
1633 (cmd
== info
->rsp_code
) ?
1634 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1637 job
->reply
->reply_payload_rcv_len
+=
1638 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1639 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1641 if (fr_eof(fp
) == FC_EOF_T
&&
1642 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1643 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1644 if (job
->reply
->reply_payload_rcv_len
>
1645 job
->reply_payload
.payload_len
)
1646 job
->reply
->reply_payload_rcv_len
=
1647 job
->reply_payload
.payload_len
;
1648 job
->reply
->result
= 0;
1649 job
->state_flags
|= FC_RQST_STATE_DONE
;
1654 mutex_unlock(&lport
->lp_mutex
);
1658 * fc_lport_els_request() - Send ELS passthrough request
1659 * @job: The BSG Passthrough job
1660 * @lport: The local port sending the request
1661 * @did: The destination port id
1663 * Locking Note: The lport lock is expected to be held before calling
1666 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1667 struct fc_lport
*lport
,
1670 struct fc_bsg_info
*info
;
1671 struct fc_frame
*fp
;
1672 struct fc_frame_header
*fh
;
1676 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1680 len
= job
->request_payload
.payload_len
;
1681 pp
= fc_frame_payload_get(fp
, len
);
1683 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1684 job
->request_payload
.sg_cnt
,
1687 fh
= fc_frame_header_get(fp
);
1688 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1689 hton24(fh
->fh_d_id
, did
);
1690 hton24(fh
->fh_s_id
, lport
->port_id
);
1691 fh
->fh_type
= FC_TYPE_ELS
;
1692 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1695 fh
->fh_parm_offset
= 0;
1697 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1704 info
->lport
= lport
;
1705 info
->rsp_code
= ELS_LS_ACC
;
1706 info
->nents
= job
->reply_payload
.sg_cnt
;
1707 info
->sg
= job
->reply_payload
.sg_list
;
1709 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1716 * fc_lport_ct_request() - Send CT Passthrough request
1717 * @job: The BSG Passthrough job
1718 * @lport: The local port sending the request
1719 * @did: The destination FC-ID
1720 * @tov: The timeout period to wait for the response
1722 * Locking Note: The lport lock is expected to be held before calling
1725 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1726 struct fc_lport
*lport
, u32 did
, u32 tov
)
1728 struct fc_bsg_info
*info
;
1729 struct fc_frame
*fp
;
1730 struct fc_frame_header
*fh
;
1731 struct fc_ct_req
*ct
;
1734 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1735 job
->request_payload
.payload_len
);
1739 len
= job
->request_payload
.payload_len
;
1740 ct
= fc_frame_payload_get(fp
, len
);
1742 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1743 job
->request_payload
.sg_cnt
,
1746 fh
= fc_frame_header_get(fp
);
1747 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1748 hton24(fh
->fh_d_id
, did
);
1749 hton24(fh
->fh_s_id
, lport
->port_id
);
1750 fh
->fh_type
= FC_TYPE_CT
;
1751 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1754 fh
->fh_parm_offset
= 0;
1756 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1763 info
->lport
= lport
;
1764 info
->rsp_code
= FC_FS_ACC
;
1765 info
->nents
= job
->reply_payload
.sg_cnt
;
1766 info
->sg
= job
->reply_payload
.sg_list
;
1768 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1775 * fc_lport_bsg_request() - The common entry point for sending
1776 * FC Passthrough requests
1777 * @job: The BSG passthrough job
1779 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1781 struct request
*rsp
= job
->req
->next_rq
;
1782 struct Scsi_Host
*shost
= job
->shost
;
1783 struct fc_lport
*lport
= shost_priv(shost
);
1784 struct fc_rport
*rport
;
1785 struct fc_rport_priv
*rdata
;
1789 job
->reply
->reply_payload_rcv_len
= 0;
1791 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1793 mutex_lock(&lport
->lp_mutex
);
1795 switch (job
->request
->msgcode
) {
1796 case FC_BSG_RPT_ELS
:
1801 rdata
= rport
->dd_data
;
1802 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1811 rdata
= rport
->dd_data
;
1812 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1817 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1818 if (did
== FC_FID_DIR_SERV
)
1819 rdata
= lport
->dns_rdata
;
1821 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1826 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1829 case FC_BSG_HST_ELS_NOLOGIN
:
1830 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1831 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1835 mutex_unlock(&lport
->lp_mutex
);
1838 EXPORT_SYMBOL(fc_lport_bsg_request
);