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 heirarchy 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 heirarchy-
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 * @sp: The sequence in the RLIR exchange
379 * @fp: The RLIR request frame
380 * @lport: Fibre Channel local port recieving the RLIR
382 * Locking Note: The lport lock is expected to be held before calling
385 static void fc_lport_recv_rlir_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
386 struct fc_lport
*lport
)
388 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
389 fc_lport_state(lport
));
391 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
396 * fc_lport_recv_echo_req() - Handle received ECHO request
397 * @sp: The sequence in the ECHO exchange
398 * @fp: ECHO request frame
399 * @lport: The local port recieving the ECHO
401 * Locking Note: The lport lock is expected to be held before calling
404 static void fc_lport_recv_echo_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
405 struct fc_lport
*lport
)
408 struct fc_exch
*ep
= fc_seq_exch(sp
);
414 FC_LPORT_DBG(lport
, "Received ECHO request while in state %s\n",
415 fc_lport_state(lport
));
417 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
418 pp
= fc_frame_payload_get(in_fp
, len
);
420 if (len
< sizeof(__be32
))
421 len
= sizeof(__be32
);
423 fp
= fc_frame_alloc(lport
, len
);
425 dp
= fc_frame_payload_get(fp
, len
);
427 *((__be32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
428 sp
= lport
->tt
.seq_start_next(sp
);
429 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
430 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
431 FC_TYPE_ELS
, f_ctl
, 0);
432 lport
->tt
.seq_send(lport
, sp
, fp
);
434 fc_frame_free(in_fp
);
438 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
439 * @sp: The sequence in the RNID exchange
440 * @fp: The RNID request frame
441 * @lport: The local port recieving the RNID
443 * Locking Note: The lport lock is expected to be held before calling
446 static void fc_lport_recv_rnid_req(struct fc_seq
*sp
, struct fc_frame
*in_fp
,
447 struct fc_lport
*lport
)
450 struct fc_exch
*ep
= fc_seq_exch(sp
);
451 struct fc_els_rnid
*req
;
453 struct fc_els_rnid_resp rnid
;
454 struct fc_els_rnid_cid cid
;
455 struct fc_els_rnid_gen gen
;
457 struct fc_seq_els_data rjt_data
;
462 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
463 fc_lport_state(lport
));
465 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
468 rjt_data
.reason
= ELS_RJT_LOGIC
;
469 rjt_data
.explan
= ELS_EXPL_NONE
;
470 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_RJT
, &rjt_data
);
474 if (fmt
!= ELS_RNIDF_GEN
||
475 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
476 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
477 len
-= sizeof(rp
->gen
);
479 fp
= fc_frame_alloc(lport
, len
);
481 rp
= fc_frame_payload_get(fp
, len
);
483 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
484 rp
->rnid
.rnid_fmt
= fmt
;
485 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
486 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
487 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
488 if (fmt
== ELS_RNIDF_GEN
) {
489 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
490 memcpy(&rp
->gen
, &lport
->rnid_gen
,
493 sp
= lport
->tt
.seq_start_next(sp
);
494 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
;
495 f_ctl
|= FC_FC_END_SEQ
| FC_FC_SEQ_INIT
;
496 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, ep
->did
, ep
->sid
,
497 FC_TYPE_ELS
, f_ctl
, 0);
498 lport
->tt
.seq_send(lport
, sp
, fp
);
501 fc_frame_free(in_fp
);
505 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
506 * @sp: The sequence in the LOGO exchange
507 * @fp: The LOGO request frame
508 * @lport: The local port recieving the LOGO
510 * Locking Note: The lport lock is exected to be held before calling
513 static void fc_lport_recv_logo_req(struct fc_seq
*sp
, struct fc_frame
*fp
,
514 struct fc_lport
*lport
)
516 lport
->tt
.seq_els_rsp_send(sp
, ELS_LS_ACC
, NULL
);
517 fc_lport_enter_reset(lport
);
522 * fc_fabric_login() - Start the lport state machine
523 * @lport: The local port that should log into the fabric
525 * Locking Note: This function should not be called
526 * with the lport lock held.
528 int fc_fabric_login(struct fc_lport
*lport
)
532 mutex_lock(&lport
->lp_mutex
);
533 if (lport
->state
== LPORT_ST_DISABLED
||
534 lport
->state
== LPORT_ST_LOGO
) {
535 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
536 fc_lport_enter_reset(lport
);
539 mutex_unlock(&lport
->lp_mutex
);
543 EXPORT_SYMBOL(fc_fabric_login
);
546 * __fc_linkup() - Handler for transport linkup events
547 * @lport: The lport whose link is up
549 * Locking: must be called with the lp_mutex held
551 void __fc_linkup(struct fc_lport
*lport
)
553 if (!lport
->link_up
) {
556 if (lport
->state
== LPORT_ST_RESET
)
557 fc_lport_enter_flogi(lport
);
562 * fc_linkup() - Handler for transport linkup events
563 * @lport: The local port whose link is up
565 void fc_linkup(struct fc_lport
*lport
)
567 printk(KERN_INFO
"host%d: libfc: Link up on port (%6.6x)\n",
568 lport
->host
->host_no
, lport
->port_id
);
570 mutex_lock(&lport
->lp_mutex
);
572 mutex_unlock(&lport
->lp_mutex
);
574 EXPORT_SYMBOL(fc_linkup
);
577 * __fc_linkdown() - Handler for transport linkdown events
578 * @lport: The lport whose link is down
580 * Locking: must be called with the lp_mutex held
582 void __fc_linkdown(struct fc_lport
*lport
)
584 if (lport
->link_up
) {
586 fc_lport_enter_reset(lport
);
587 lport
->tt
.fcp_cleanup(lport
);
592 * fc_linkdown() - Handler for transport linkdown events
593 * @lport: The local port whose link is down
595 void fc_linkdown(struct fc_lport
*lport
)
597 printk(KERN_INFO
"host%d: libfc: Link down on port (%6.6x)\n",
598 lport
->host
->host_no
, lport
->port_id
);
600 mutex_lock(&lport
->lp_mutex
);
601 __fc_linkdown(lport
);
602 mutex_unlock(&lport
->lp_mutex
);
604 EXPORT_SYMBOL(fc_linkdown
);
607 * fc_fabric_logoff() - Logout of the fabric
608 * @lport: The local port to logoff the fabric
611 * 0 for success, -1 for failure
613 int fc_fabric_logoff(struct fc_lport
*lport
)
615 lport
->tt
.disc_stop_final(lport
);
616 mutex_lock(&lport
->lp_mutex
);
617 if (lport
->dns_rdata
)
618 lport
->tt
.rport_logoff(lport
->dns_rdata
);
619 mutex_unlock(&lport
->lp_mutex
);
620 lport
->tt
.rport_flush_queue();
621 mutex_lock(&lport
->lp_mutex
);
622 fc_lport_enter_logo(lport
);
623 mutex_unlock(&lport
->lp_mutex
);
624 cancel_delayed_work_sync(&lport
->retry_work
);
627 EXPORT_SYMBOL(fc_fabric_logoff
);
630 * fc_lport_destroy() - Unregister a fc_lport
631 * @lport: The local port to unregister
634 * exit routine for fc_lport instance
635 * clean-up all the allocated memory
636 * and free up other system resources.
639 int fc_lport_destroy(struct fc_lport
*lport
)
641 mutex_lock(&lport
->lp_mutex
);
642 lport
->state
= LPORT_ST_DISABLED
;
644 lport
->tt
.frame_send
= fc_frame_drop
;
645 mutex_unlock(&lport
->lp_mutex
);
647 lport
->tt
.fcp_abort_io(lport
);
648 lport
->tt
.disc_stop_final(lport
);
649 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
652 EXPORT_SYMBOL(fc_lport_destroy
);
655 * fc_set_mfs() - Set the maximum frame size for a local port
656 * @lport: The local port to set the MFS for
659 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
661 unsigned int old_mfs
;
664 mutex_lock(&lport
->lp_mutex
);
666 old_mfs
= lport
->mfs
;
668 if (mfs
>= FC_MIN_MAX_FRAME
) {
670 if (mfs
> FC_MAX_FRAME
)
672 mfs
-= sizeof(struct fc_frame_header
);
677 if (!rc
&& mfs
< old_mfs
)
678 fc_lport_enter_reset(lport
);
680 mutex_unlock(&lport
->lp_mutex
);
684 EXPORT_SYMBOL(fc_set_mfs
);
687 * fc_lport_disc_callback() - Callback for discovery events
688 * @lport: The local port receiving the event
689 * @event: The discovery event
691 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
694 case DISC_EV_SUCCESS
:
695 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
698 printk(KERN_ERR
"host%d: libfc: "
699 "Discovery failed for port (%6.6x)\n",
700 lport
->host
->host_no
, lport
->port_id
);
701 mutex_lock(&lport
->lp_mutex
);
702 fc_lport_enter_reset(lport
);
703 mutex_unlock(&lport
->lp_mutex
);
712 * fc_rport_enter_ready() - Enter the ready state and start discovery
713 * @lport: The local port that is ready
715 * Locking Note: The lport lock is expected to be held before calling
718 static void fc_lport_enter_ready(struct fc_lport
*lport
)
720 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
721 fc_lport_state(lport
));
723 fc_lport_state_enter(lport
, LPORT_ST_READY
);
725 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
726 fc_vports_linkchange(lport
);
728 if (!lport
->ptp_rdata
)
729 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
733 * fc_lport_set_port_id() - set the local port Port ID
734 * @lport: The local port which will have its Port ID set.
735 * @port_id: The new port ID.
736 * @fp: The frame containing the incoming request, or NULL.
738 * Locking Note: The lport lock is expected to be held before calling
741 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
745 printk(KERN_INFO
"host%d: Assigned Port ID %6.6x\n",
746 lport
->host
->host_no
, port_id
);
748 lport
->port_id
= port_id
;
750 /* Update the fc_host */
751 fc_host_port_id(lport
->host
) = port_id
;
753 if (lport
->tt
.lport_set_port_id
)
754 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
758 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
759 * @lport: The local port which will have its Port ID set.
760 * @port_id: The new port ID.
762 * Called by the lower-level driver when transport sets the local port_id.
763 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
764 * discovery to be skipped.
766 void fc_lport_set_local_id(struct fc_lport
*lport
, u32 port_id
)
768 mutex_lock(&lport
->lp_mutex
);
770 fc_lport_set_port_id(lport
, port_id
, NULL
);
772 switch (lport
->state
) {
776 fc_lport_enter_ready(lport
);
781 mutex_unlock(&lport
->lp_mutex
);
783 EXPORT_SYMBOL(fc_lport_set_local_id
);
786 * fc_lport_recv_flogi_req() - Receive a FLOGI request
787 * @sp_in: The sequence the FLOGI is on
788 * @rx_fp: The FLOGI frame
789 * @lport: The local port that recieved the request
791 * A received FLOGI request indicates a point-to-point connection.
792 * Accept it with the common service parameters indicating our N port.
793 * Set up to do a PLOGI if we have the higher-number WWPN.
795 * Locking Note: The lport lock is expected to be held before calling
798 static void fc_lport_recv_flogi_req(struct fc_seq
*sp_in
,
799 struct fc_frame
*rx_fp
,
800 struct fc_lport
*lport
)
803 struct fc_frame_header
*fh
;
806 struct fc_els_flogi
*flp
;
807 struct fc_els_flogi
*new_flp
;
813 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
814 fc_lport_state(lport
));
816 fh
= fc_frame_header_get(rx_fp
);
817 remote_fid
= ntoh24(fh
->fh_s_id
);
818 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
821 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
822 if (remote_wwpn
== lport
->wwpn
) {
823 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
824 "with same WWPN %16.16llx\n",
825 lport
->host
->host_no
, remote_wwpn
);
828 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
831 * XXX what is the right thing to do for FIDs?
832 * The originator might expect our S_ID to be 0xfffffe.
833 * But if so, both of us could end up with the same FID.
835 local_fid
= FC_LOCAL_PTP_FID_LO
;
836 if (remote_wwpn
< lport
->wwpn
) {
837 local_fid
= FC_LOCAL_PTP_FID_HI
;
838 if (!remote_fid
|| remote_fid
== local_fid
)
839 remote_fid
= FC_LOCAL_PTP_FID_LO
;
840 } else if (!remote_fid
) {
841 remote_fid
= FC_LOCAL_PTP_FID_HI
;
844 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
846 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
848 sp
= lport
->tt
.seq_start_next(fr_seq(rx_fp
));
849 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
850 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
851 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
854 * Send the response. If this fails, the originator should
855 * repeat the sequence.
857 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
858 ep
= fc_seq_exch(sp
);
859 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, remote_fid
, local_fid
,
860 FC_TYPE_ELS
, f_ctl
, 0);
861 lport
->tt
.seq_send(lport
, sp
, fp
);
864 fc_lport_error(lport
, fp
);
866 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
867 get_unaligned_be64(&flp
->fl_wwnn
));
871 fc_frame_free(rx_fp
);
875 * fc_lport_recv_req() - The generic lport request handler
876 * @lport: The local port that received the request
877 * @sp: The sequence the request is on
878 * @fp: The request frame
880 * This function will see if the lport handles the request or
881 * if an rport should handle the request.
883 * Locking Note: This function should not be called with the lport
884 * lock held becuase it will grab the lock.
886 static void fc_lport_recv_req(struct fc_lport
*lport
, struct fc_seq
*sp
,
889 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
890 void (*recv
) (struct fc_seq
*, struct fc_frame
*, struct fc_lport
*);
892 mutex_lock(&lport
->lp_mutex
);
895 * Handle special ELS cases like FLOGI, LOGO, and
896 * RSCN here. These don't require a session.
897 * Even if we had a session, it might not be ready.
901 else if (fh
->fh_type
== FC_TYPE_ELS
&&
902 fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
906 recv
= lport
->tt
.rport_recv_req
;
907 switch (fc_frame_payload_op(fp
)) {
909 if (!lport
->point_to_multipoint
)
910 recv
= fc_lport_recv_flogi_req
;
913 if (ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
)
914 recv
= fc_lport_recv_logo_req
;
917 recv
= lport
->tt
.disc_recv_req
;
920 recv
= fc_lport_recv_echo_req
;
923 recv
= fc_lport_recv_rlir_req
;
926 recv
= fc_lport_recv_rnid_req
;
932 FC_LPORT_DBG(lport
, "dropping invalid frame (eof %x)\n",
936 mutex_unlock(&lport
->lp_mutex
);
939 * The common exch_done for all request may not be good
940 * if any request requires longer hold on exhange. XXX
942 lport
->tt
.exch_done(sp
);
946 * fc_lport_reset() - Reset a local port
947 * @lport: The local port which should be reset
949 * Locking Note: This functions should not be called with the
952 int fc_lport_reset(struct fc_lport
*lport
)
954 cancel_delayed_work_sync(&lport
->retry_work
);
955 mutex_lock(&lport
->lp_mutex
);
956 fc_lport_enter_reset(lport
);
957 mutex_unlock(&lport
->lp_mutex
);
960 EXPORT_SYMBOL(fc_lport_reset
);
963 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
964 * @lport: The local port to be reset
966 * Locking Note: The lport lock is expected to be held before calling
969 static void fc_lport_reset_locked(struct fc_lport
*lport
)
971 if (lport
->dns_rdata
)
972 lport
->tt
.rport_logoff(lport
->dns_rdata
);
974 if (lport
->ptp_rdata
) {
975 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
976 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
977 lport
->ptp_rdata
= NULL
;
980 lport
->tt
.disc_stop(lport
);
982 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
983 fc_host_fabric_name(lport
->host
) = 0;
985 if (lport
->port_id
&& (!lport
->point_to_multipoint
|| !lport
->link_up
))
986 fc_lport_set_port_id(lport
, 0, NULL
);
990 * fc_lport_enter_reset() - Reset the local port
991 * @lport: The local port to be reset
993 * Locking Note: The lport lock is expected to be held before calling
996 static void fc_lport_enter_reset(struct fc_lport
*lport
)
998 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
999 fc_lport_state(lport
));
1001 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
1006 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
1008 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
1010 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
1011 fc_vports_linkchange(lport
);
1012 fc_lport_reset_locked(lport
);
1014 fc_lport_enter_flogi(lport
);
1018 * fc_lport_enter_disabled() - Disable the local port
1019 * @lport: The local port to be reset
1021 * Locking Note: The lport lock is expected to be held before calling
1024 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
1026 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
1027 fc_lport_state(lport
));
1029 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1030 fc_vports_linkchange(lport
);
1031 fc_lport_reset_locked(lport
);
1035 * fc_lport_error() - Handler for any errors
1036 * @lport: The local port that the error was on
1037 * @fp: The error code encoded in a frame pointer
1039 * If the error was caused by a resource allocation failure
1040 * then wait for half a second and retry, otherwise retry
1041 * after the e_d_tov time.
1043 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1045 unsigned long delay
= 0;
1046 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1047 PTR_ERR(fp
), fc_lport_state(lport
),
1048 lport
->retry_count
);
1050 if (!fp
|| PTR_ERR(fp
) == -FC_EX_TIMEOUT
) {
1052 * Memory allocation failure, or the exchange timed out.
1055 if (lport
->retry_count
< lport
->max_retry_count
) {
1056 lport
->retry_count
++;
1058 delay
= msecs_to_jiffies(500);
1060 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1062 schedule_delayed_work(&lport
->retry_work
, delay
);
1064 switch (lport
->state
) {
1065 case LPORT_ST_DISABLED
:
1066 case LPORT_ST_READY
:
1067 case LPORT_ST_RESET
:
1068 case LPORT_ST_RNN_ID
:
1069 case LPORT_ST_RSNN_NN
:
1070 case LPORT_ST_RSPN_ID
:
1071 case LPORT_ST_RFT_ID
:
1072 case LPORT_ST_RFF_ID
:
1075 case LPORT_ST_FLOGI
:
1077 fc_lport_enter_reset(lport
);
1085 * fc_lport_ns_resp() - Handle response to a name server
1086 * registration exchange
1087 * @sp: current sequence in exchange
1088 * @fp: response frame
1089 * @lp_arg: Fibre Channel host port instance
1091 * Locking Note: This function will be called without the lport lock
1092 * held, but it will lock, call an _enter_* function or fc_lport_error()
1093 * and then unlock the lport.
1095 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1098 struct fc_lport
*lport
= lp_arg
;
1099 struct fc_frame_header
*fh
;
1100 struct fc_ct_hdr
*ct
;
1102 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1104 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1107 mutex_lock(&lport
->lp_mutex
);
1109 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1110 FC_LPORT_DBG(lport
, "Received a name server response, "
1111 "but in state %s\n", fc_lport_state(lport
));
1118 fc_lport_error(lport
, fp
);
1122 fh
= fc_frame_header_get(fp
);
1123 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1125 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1126 ct
->ct_fs_type
== FC_FST_DIR
&&
1127 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1128 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1129 switch (lport
->state
) {
1130 case LPORT_ST_RNN_ID
:
1131 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1133 case LPORT_ST_RSNN_NN
:
1134 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1136 case LPORT_ST_RSPN_ID
:
1137 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1139 case LPORT_ST_RFT_ID
:
1140 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1142 case LPORT_ST_RFF_ID
:
1143 fc_lport_enter_scr(lport
);
1146 /* should have already been caught by state checks */
1150 fc_lport_error(lport
, fp
);
1154 mutex_unlock(&lport
->lp_mutex
);
1158 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1159 * @sp: current sequence in SCR exchange
1160 * @fp: response frame
1161 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1163 * Locking Note: This function will be called without the lport lock
1164 * held, but it will lock, call an _enter_* function or fc_lport_error
1165 * and then unlock the lport.
1167 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1170 struct fc_lport
*lport
= lp_arg
;
1173 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1175 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1178 mutex_lock(&lport
->lp_mutex
);
1180 if (lport
->state
!= LPORT_ST_SCR
) {
1181 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1182 "%s\n", fc_lport_state(lport
));
1189 fc_lport_error(lport
, fp
);
1193 op
= fc_frame_payload_op(fp
);
1194 if (op
== ELS_LS_ACC
)
1195 fc_lport_enter_ready(lport
);
1197 fc_lport_error(lport
, fp
);
1202 mutex_unlock(&lport
->lp_mutex
);
1206 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1207 * @lport: The local port to register for state changes
1209 * Locking Note: The lport lock is expected to be held before calling
1212 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1214 struct fc_frame
*fp
;
1216 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1217 fc_lport_state(lport
));
1219 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1221 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1223 fc_lport_error(lport
, fp
);
1227 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1228 fc_lport_scr_resp
, lport
,
1229 2 * lport
->r_a_tov
))
1230 fc_lport_error(lport
, NULL
);
1234 * fc_lport_enter_ns() - register some object with the name server
1235 * @lport: Fibre Channel local port to register
1237 * Locking Note: The lport lock is expected to be held before calling
1240 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1242 struct fc_frame
*fp
;
1244 int size
= sizeof(struct fc_ct_hdr
);
1247 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1248 fc_lport_state_names
[state
],
1249 fc_lport_state(lport
));
1251 fc_lport_state_enter(lport
, state
);
1254 case LPORT_ST_RNN_ID
:
1256 size
+= sizeof(struct fc_ns_rn_id
);
1258 case LPORT_ST_RSNN_NN
:
1259 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1260 /* if there is no symbolic name, skip to RFT_ID */
1262 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1263 cmd
= FC_NS_RSNN_NN
;
1264 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1266 case LPORT_ST_RSPN_ID
:
1267 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1268 /* if there is no symbolic name, skip to RFT_ID */
1270 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1271 cmd
= FC_NS_RSPN_ID
;
1272 size
+= sizeof(struct fc_ns_rspn
) + len
;
1274 case LPORT_ST_RFT_ID
:
1276 size
+= sizeof(struct fc_ns_rft
);
1278 case LPORT_ST_RFF_ID
:
1280 size
+= sizeof(struct fc_ns_rff_id
);
1283 fc_lport_error(lport
, NULL
);
1287 fp
= fc_frame_alloc(lport
, size
);
1289 fc_lport_error(lport
, fp
);
1293 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1295 lport
, 3 * lport
->r_a_tov
))
1296 fc_lport_error(lport
, fp
);
1299 static struct fc_rport_operations fc_lport_rport_ops
= {
1300 .event_callback
= fc_lport_rport_callback
,
1304 * fc_rport_enter_dns() - Create a fc_rport for the name server
1305 * @lport: The local port requesting a remote port for the name server
1307 * Locking Note: The lport lock is expected to be held before calling
1310 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1312 struct fc_rport_priv
*rdata
;
1314 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1315 fc_lport_state(lport
));
1317 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1319 mutex_lock(&lport
->disc
.disc_mutex
);
1320 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1321 mutex_unlock(&lport
->disc
.disc_mutex
);
1325 rdata
->ops
= &fc_lport_rport_ops
;
1326 lport
->tt
.rport_login(rdata
);
1330 fc_lport_error(lport
, NULL
);
1334 * fc_lport_timeout() - Handler for the retry_work timer
1335 * @work: The work struct of the local port
1337 static void fc_lport_timeout(struct work_struct
*work
)
1339 struct fc_lport
*lport
=
1340 container_of(work
, struct fc_lport
,
1343 mutex_lock(&lport
->lp_mutex
);
1345 switch (lport
->state
) {
1346 case LPORT_ST_DISABLED
:
1349 case LPORT_ST_READY
:
1352 case LPORT_ST_RESET
:
1354 case LPORT_ST_FLOGI
:
1355 fc_lport_enter_flogi(lport
);
1358 fc_lport_enter_dns(lport
);
1360 case LPORT_ST_RNN_ID
:
1361 case LPORT_ST_RSNN_NN
:
1362 case LPORT_ST_RSPN_ID
:
1363 case LPORT_ST_RFT_ID
:
1364 case LPORT_ST_RFF_ID
:
1365 fc_lport_enter_ns(lport
, lport
->state
);
1368 fc_lport_enter_scr(lport
);
1371 fc_lport_enter_logo(lport
);
1375 mutex_unlock(&lport
->lp_mutex
);
1379 * fc_lport_logo_resp() - Handle response to LOGO request
1380 * @sp: The sequence that the LOGO was on
1381 * @fp: The LOGO frame
1382 * @lp_arg: The lport port that received the LOGO request
1384 * Locking Note: This function will be called without the lport lock
1385 * held, but it will lock, call an _enter_* function or fc_lport_error()
1386 * and then unlock the lport.
1388 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1391 struct fc_lport
*lport
= lp_arg
;
1394 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1396 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1399 mutex_lock(&lport
->lp_mutex
);
1401 if (lport
->state
!= LPORT_ST_LOGO
) {
1402 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1403 "%s\n", fc_lport_state(lport
));
1410 fc_lport_error(lport
, fp
);
1414 op
= fc_frame_payload_op(fp
);
1415 if (op
== ELS_LS_ACC
)
1416 fc_lport_enter_disabled(lport
);
1418 fc_lport_error(lport
, fp
);
1423 mutex_unlock(&lport
->lp_mutex
);
1425 EXPORT_SYMBOL(fc_lport_logo_resp
);
1428 * fc_rport_enter_logo() - Logout of the fabric
1429 * @lport: The local port to be logged out
1431 * Locking Note: The lport lock is expected to be held before calling
1434 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1436 struct fc_frame
*fp
;
1437 struct fc_els_logo
*logo
;
1439 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1440 fc_lport_state(lport
));
1442 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1443 fc_vports_linkchange(lport
);
1445 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1447 fc_lport_error(lport
, fp
);
1451 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1452 fc_lport_logo_resp
, lport
,
1453 2 * lport
->r_a_tov
))
1454 fc_lport_error(lport
, NULL
);
1458 * fc_lport_flogi_resp() - Handle response to FLOGI request
1459 * @sp: The sequence that the FLOGI was on
1460 * @fp: The FLOGI response frame
1461 * @lp_arg: The lport port that received the FLOGI response
1463 * Locking Note: This function will be called without the lport lock
1464 * held, but it will lock, call an _enter_* function or fc_lport_error()
1465 * and then unlock the lport.
1467 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1470 struct fc_lport
*lport
= lp_arg
;
1471 struct fc_frame_header
*fh
;
1472 struct fc_els_flogi
*flp
;
1475 unsigned int r_a_tov
;
1476 unsigned int e_d_tov
;
1479 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1481 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1484 mutex_lock(&lport
->lp_mutex
);
1486 if (lport
->state
!= LPORT_ST_FLOGI
) {
1487 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1488 "%s\n", fc_lport_state(lport
));
1495 fc_lport_error(lport
, fp
);
1499 fh
= fc_frame_header_get(fp
);
1500 did
= ntoh24(fh
->fh_d_id
);
1501 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
!= 0) {
1502 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1504 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1506 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1509 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1510 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1511 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1512 if (csp_flags
& FC_SP_FT_EDTR
)
1515 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1517 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1518 if (e_d_tov
> lport
->e_d_tov
)
1519 lport
->e_d_tov
= e_d_tov
;
1520 lport
->r_a_tov
= 2 * e_d_tov
;
1521 fc_lport_set_port_id(lport
, did
, fp
);
1522 printk(KERN_INFO
"host%d: libfc: "
1523 "Port (%6.6x) entered "
1524 "point-to-point mode\n",
1525 lport
->host
->host_no
, did
);
1526 fc_lport_ptp_setup(lport
, ntoh24(fh
->fh_s_id
),
1532 lport
->e_d_tov
= e_d_tov
;
1533 lport
->r_a_tov
= r_a_tov
;
1534 fc_host_fabric_name(lport
->host
) =
1535 get_unaligned_be64(&flp
->fl_wwnn
);
1536 fc_lport_set_port_id(lport
, did
, fp
);
1537 fc_lport_enter_dns(lport
);
1541 FC_LPORT_DBG(lport
, "Bad FLOGI response\n");
1547 mutex_unlock(&lport
->lp_mutex
);
1549 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1552 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1553 * @lport: Fibre Channel local port to be logged in to the fabric
1555 * Locking Note: The lport lock is expected to be held before calling
1558 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1560 struct fc_frame
*fp
;
1562 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1563 fc_lport_state(lport
));
1565 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1567 if (lport
->point_to_multipoint
) {
1569 fc_lport_enter_ready(lport
);
1573 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1575 return fc_lport_error(lport
, fp
);
1577 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1578 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1579 fc_lport_flogi_resp
, lport
,
1580 lport
->vport
? 2 * lport
->r_a_tov
:
1582 fc_lport_error(lport
, NULL
);
1586 * fc_lport_config() - Configure a fc_lport
1587 * @lport: The local port to be configured
1589 int fc_lport_config(struct fc_lport
*lport
)
1591 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1592 mutex_init(&lport
->lp_mutex
);
1594 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1596 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1597 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1601 EXPORT_SYMBOL(fc_lport_config
);
1604 * fc_lport_init() - Initialize the lport layer for a local port
1605 * @lport: The local port to initialize the exchange layer for
1607 int fc_lport_init(struct fc_lport
*lport
)
1609 if (!lport
->tt
.lport_recv
)
1610 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1612 if (!lport
->tt
.lport_reset
)
1613 lport
->tt
.lport_reset
= fc_lport_reset
;
1615 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1616 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1617 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1618 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1619 memset(fc_host_supported_fc4s(lport
->host
), 0,
1620 sizeof(fc_host_supported_fc4s(lport
->host
)));
1621 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1622 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1624 /* This value is also unchanging */
1625 memset(fc_host_active_fc4s(lport
->host
), 0,
1626 sizeof(fc_host_active_fc4s(lport
->host
)));
1627 fc_host_active_fc4s(lport
->host
)[2] = 1;
1628 fc_host_active_fc4s(lport
->host
)[7] = 1;
1629 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1630 fc_host_supported_speeds(lport
->host
) = 0;
1631 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1632 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1633 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1634 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1638 EXPORT_SYMBOL(fc_lport_init
);
1641 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1642 * @sp: The sequence for the FC Passthrough response
1643 * @fp: The response frame
1644 * @info_arg: The BSG info that the response is for
1646 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1649 struct fc_bsg_info
*info
= info_arg
;
1650 struct fc_bsg_job
*job
= info
->job
;
1651 struct fc_lport
*lport
= info
->lport
;
1652 struct fc_frame_header
*fh
;
1657 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1658 -ECONNABORTED
: -ETIMEDOUT
;
1659 job
->reply_len
= sizeof(uint32_t);
1660 job
->state_flags
|= FC_RQST_STATE_DONE
;
1666 mutex_lock(&lport
->lp_mutex
);
1667 fh
= fc_frame_header_get(fp
);
1668 len
= fr_len(fp
) - sizeof(*fh
);
1669 buf
= fc_frame_payload_get(fp
, 0);
1671 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1672 /* Get the response code from the first frame payload */
1673 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1674 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1675 (unsigned short)fc_frame_payload_op(fp
);
1677 /* Save the reply status of the job */
1678 job
->reply
->reply_data
.ctels_reply
.status
=
1679 (cmd
== info
->rsp_code
) ?
1680 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1683 job
->reply
->reply_payload_rcv_len
+=
1684 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1685 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1687 if (fr_eof(fp
) == FC_EOF_T
&&
1688 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1689 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1690 if (job
->reply
->reply_payload_rcv_len
>
1691 job
->reply_payload
.payload_len
)
1692 job
->reply
->reply_payload_rcv_len
=
1693 job
->reply_payload
.payload_len
;
1694 job
->reply
->result
= 0;
1695 job
->state_flags
|= FC_RQST_STATE_DONE
;
1700 mutex_unlock(&lport
->lp_mutex
);
1704 * fc_lport_els_request() - Send ELS passthrough request
1705 * @job: The BSG Passthrough job
1706 * @lport: The local port sending the request
1707 * @did: The destination port id
1709 * Locking Note: The lport lock is expected to be held before calling
1712 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1713 struct fc_lport
*lport
,
1716 struct fc_bsg_info
*info
;
1717 struct fc_frame
*fp
;
1718 struct fc_frame_header
*fh
;
1722 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1726 len
= job
->request_payload
.payload_len
;
1727 pp
= fc_frame_payload_get(fp
, len
);
1729 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1730 job
->request_payload
.sg_cnt
,
1733 fh
= fc_frame_header_get(fp
);
1734 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1735 hton24(fh
->fh_d_id
, did
);
1736 hton24(fh
->fh_s_id
, lport
->port_id
);
1737 fh
->fh_type
= FC_TYPE_ELS
;
1738 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1739 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1742 fh
->fh_parm_offset
= 0;
1744 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1751 info
->lport
= lport
;
1752 info
->rsp_code
= ELS_LS_ACC
;
1753 info
->nents
= job
->reply_payload
.sg_cnt
;
1754 info
->sg
= job
->reply_payload
.sg_list
;
1756 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1763 * fc_lport_ct_request() - Send CT Passthrough request
1764 * @job: The BSG Passthrough job
1765 * @lport: The local port sending the request
1766 * @did: The destination FC-ID
1767 * @tov: The timeout period to wait for the response
1769 * Locking Note: The lport lock is expected to be held before calling
1772 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1773 struct fc_lport
*lport
, u32 did
, u32 tov
)
1775 struct fc_bsg_info
*info
;
1776 struct fc_frame
*fp
;
1777 struct fc_frame_header
*fh
;
1778 struct fc_ct_req
*ct
;
1781 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1782 job
->request_payload
.payload_len
);
1786 len
= job
->request_payload
.payload_len
;
1787 ct
= fc_frame_payload_get(fp
, len
);
1789 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1790 job
->request_payload
.sg_cnt
,
1793 fh
= fc_frame_header_get(fp
);
1794 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1795 hton24(fh
->fh_d_id
, did
);
1796 hton24(fh
->fh_s_id
, lport
->port_id
);
1797 fh
->fh_type
= FC_TYPE_CT
;
1798 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1799 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1802 fh
->fh_parm_offset
= 0;
1804 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1811 info
->lport
= lport
;
1812 info
->rsp_code
= FC_FS_ACC
;
1813 info
->nents
= job
->reply_payload
.sg_cnt
;
1814 info
->sg
= job
->reply_payload
.sg_list
;
1816 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1823 * fc_lport_bsg_request() - The common entry point for sending
1824 * FC Passthrough requests
1825 * @job: The BSG passthrough job
1827 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1829 struct request
*rsp
= job
->req
->next_rq
;
1830 struct Scsi_Host
*shost
= job
->shost
;
1831 struct fc_lport
*lport
= shost_priv(shost
);
1832 struct fc_rport
*rport
;
1833 struct fc_rport_priv
*rdata
;
1837 job
->reply
->reply_payload_rcv_len
= 0;
1839 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1841 mutex_lock(&lport
->lp_mutex
);
1843 switch (job
->request
->msgcode
) {
1844 case FC_BSG_RPT_ELS
:
1849 rdata
= rport
->dd_data
;
1850 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1859 rdata
= rport
->dd_data
;
1860 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1865 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1866 if (did
== FC_FID_DIR_SERV
)
1867 rdata
= lport
->dns_rdata
;
1869 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1874 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1877 case FC_BSG_HST_ELS_NOLOGIN
:
1878 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1879 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1883 mutex_unlock(&lport
->lp_mutex
);
1886 EXPORT_SYMBOL(fc_lport_bsg_request
);