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_recv_flogi_req() - Receive a FLOGI request
759 * @sp_in: The sequence the FLOGI is on
760 * @rx_fp: The FLOGI frame
761 * @lport: The local port that recieved the request
763 * A received FLOGI request indicates a point-to-point connection.
764 * Accept it with the common service parameters indicating our N port.
765 * Set up to do a PLOGI if we have the higher-number WWPN.
767 * Locking Note: The lport lock is expected to be held before calling
770 static void fc_lport_recv_flogi_req(struct fc_seq
*sp_in
,
771 struct fc_frame
*rx_fp
,
772 struct fc_lport
*lport
)
775 struct fc_frame_header
*fh
;
778 struct fc_els_flogi
*flp
;
779 struct fc_els_flogi
*new_flp
;
785 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
786 fc_lport_state(lport
));
788 fh
= fc_frame_header_get(rx_fp
);
789 remote_fid
= ntoh24(fh
->fh_s_id
);
790 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
793 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
794 if (remote_wwpn
== lport
->wwpn
) {
795 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
796 "with same WWPN %16.16llx\n",
797 lport
->host
->host_no
, remote_wwpn
);
800 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
803 * XXX what is the right thing to do for FIDs?
804 * The originator might expect our S_ID to be 0xfffffe.
805 * But if so, both of us could end up with the same FID.
807 local_fid
= FC_LOCAL_PTP_FID_LO
;
808 if (remote_wwpn
< lport
->wwpn
) {
809 local_fid
= FC_LOCAL_PTP_FID_HI
;
810 if (!remote_fid
|| remote_fid
== local_fid
)
811 remote_fid
= FC_LOCAL_PTP_FID_LO
;
812 } else if (!remote_fid
) {
813 remote_fid
= FC_LOCAL_PTP_FID_HI
;
816 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
818 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
820 sp
= lport
->tt
.seq_start_next(fr_seq(rx_fp
));
821 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
822 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
823 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
826 * Send the response. If this fails, the originator should
827 * repeat the sequence.
829 f_ctl
= FC_FC_EX_CTX
| FC_FC_LAST_SEQ
| FC_FC_END_SEQ
;
830 ep
= fc_seq_exch(sp
);
831 fc_fill_fc_hdr(fp
, FC_RCTL_ELS_REP
, remote_fid
, local_fid
,
832 FC_TYPE_ELS
, f_ctl
, 0);
833 lport
->tt
.seq_send(lport
, sp
, fp
);
836 fc_lport_error(lport
, fp
);
838 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
839 get_unaligned_be64(&flp
->fl_wwnn
));
843 fc_frame_free(rx_fp
);
847 * fc_lport_recv_req() - The generic lport request handler
848 * @lport: The local port that received the request
849 * @sp: The sequence the request is on
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_seq
*sp
,
861 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
862 void (*recv
) (struct fc_seq
*, struct fc_frame
*, struct fc_lport
*);
864 mutex_lock(&lport
->lp_mutex
);
867 * Handle special ELS cases like FLOGI, LOGO, and
868 * RSCN here. These don't require a session.
869 * Even if we had a session, it might not be ready.
873 else if (fh
->fh_type
== FC_TYPE_ELS
&&
874 fh
->fh_r_ctl
== FC_RCTL_ELS_REQ
) {
878 recv
= lport
->tt
.rport_recv_req
;
879 switch (fc_frame_payload_op(fp
)) {
881 recv
= fc_lport_recv_flogi_req
;
884 fh
= fc_frame_header_get(fp
);
885 if (ntoh24(fh
->fh_s_id
) == FC_FID_FLOGI
)
886 recv
= fc_lport_recv_logo_req
;
889 recv
= lport
->tt
.disc_recv_req
;
892 recv
= fc_lport_recv_echo_req
;
895 recv
= fc_lport_recv_rlir_req
;
898 recv
= fc_lport_recv_rnid_req
;
904 FC_LPORT_DBG(lport
, "dropping invalid frame (eof %x)\n",
908 mutex_unlock(&lport
->lp_mutex
);
911 * The common exch_done for all request may not be good
912 * if any request requires longer hold on exhange. XXX
914 lport
->tt
.exch_done(sp
);
918 * fc_lport_reset() - Reset a local port
919 * @lport: The local port which should be reset
921 * Locking Note: This functions should not be called with the
924 int fc_lport_reset(struct fc_lport
*lport
)
926 cancel_delayed_work_sync(&lport
->retry_work
);
927 mutex_lock(&lport
->lp_mutex
);
928 fc_lport_enter_reset(lport
);
929 mutex_unlock(&lport
->lp_mutex
);
932 EXPORT_SYMBOL(fc_lport_reset
);
935 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
936 * @lport: The local port to be reset
938 * Locking Note: The lport lock is expected to be held before calling
941 static void fc_lport_reset_locked(struct fc_lport
*lport
)
943 if (lport
->dns_rdata
)
944 lport
->tt
.rport_logoff(lport
->dns_rdata
);
946 if (lport
->ptp_rdata
) {
947 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
948 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
949 lport
->ptp_rdata
= NULL
;
952 lport
->tt
.disc_stop(lport
);
954 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
955 fc_host_fabric_name(lport
->host
) = 0;
958 fc_lport_set_port_id(lport
, 0, NULL
);
962 * fc_lport_enter_reset() - Reset the local port
963 * @lport: The local port to be reset
965 * Locking Note: The lport lock is expected to be held before calling
968 static void fc_lport_enter_reset(struct fc_lport
*lport
)
970 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
971 fc_lport_state(lport
));
973 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
978 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
980 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
982 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
983 fc_vports_linkchange(lport
);
984 fc_lport_reset_locked(lport
);
986 fc_lport_enter_flogi(lport
);
990 * fc_lport_enter_disabled() - Disable 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_disabled(struct fc_lport
*lport
)
998 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
999 fc_lport_state(lport
));
1001 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1002 fc_vports_linkchange(lport
);
1003 fc_lport_reset_locked(lport
);
1007 * fc_lport_error() - Handler for any errors
1008 * @lport: The local port that the error was on
1009 * @fp: The error code encoded in a frame pointer
1011 * If the error was caused by a resource allocation failure
1012 * then wait for half a second and retry, otherwise retry
1013 * after the e_d_tov time.
1015 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1017 unsigned long delay
= 0;
1018 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1019 PTR_ERR(fp
), fc_lport_state(lport
),
1020 lport
->retry_count
);
1022 if (!fp
|| PTR_ERR(fp
) == -FC_EX_TIMEOUT
) {
1024 * Memory allocation failure, or the exchange timed out.
1027 if (lport
->retry_count
< lport
->max_retry_count
) {
1028 lport
->retry_count
++;
1030 delay
= msecs_to_jiffies(500);
1032 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1034 schedule_delayed_work(&lport
->retry_work
, delay
);
1036 switch (lport
->state
) {
1037 case LPORT_ST_DISABLED
:
1038 case LPORT_ST_READY
:
1039 case LPORT_ST_RESET
:
1040 case LPORT_ST_RNN_ID
:
1041 case LPORT_ST_RSNN_NN
:
1042 case LPORT_ST_RSPN_ID
:
1043 case LPORT_ST_RFT_ID
:
1044 case LPORT_ST_RFF_ID
:
1047 case LPORT_ST_FLOGI
:
1049 fc_lport_enter_reset(lport
);
1057 * fc_lport_ns_resp() - Handle response to a name server
1058 * registration exchange
1059 * @sp: current sequence in exchange
1060 * @fp: response frame
1061 * @lp_arg: Fibre Channel host port instance
1063 * Locking Note: This function will be called without the lport lock
1064 * held, but it will lock, call an _enter_* function or fc_lport_error()
1065 * and then unlock the lport.
1067 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1070 struct fc_lport
*lport
= lp_arg
;
1071 struct fc_frame_header
*fh
;
1072 struct fc_ct_hdr
*ct
;
1074 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1076 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1079 mutex_lock(&lport
->lp_mutex
);
1081 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1082 FC_LPORT_DBG(lport
, "Received a name server response, "
1083 "but in state %s\n", fc_lport_state(lport
));
1090 fc_lport_error(lport
, fp
);
1094 fh
= fc_frame_header_get(fp
);
1095 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1097 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1098 ct
->ct_fs_type
== FC_FST_DIR
&&
1099 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1100 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1101 switch (lport
->state
) {
1102 case LPORT_ST_RNN_ID
:
1103 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1105 case LPORT_ST_RSNN_NN
:
1106 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1108 case LPORT_ST_RSPN_ID
:
1109 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1111 case LPORT_ST_RFT_ID
:
1112 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1114 case LPORT_ST_RFF_ID
:
1115 fc_lport_enter_scr(lport
);
1118 /* should have already been caught by state checks */
1122 fc_lport_error(lport
, fp
);
1126 mutex_unlock(&lport
->lp_mutex
);
1130 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1131 * @sp: current sequence in SCR exchange
1132 * @fp: response frame
1133 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1135 * Locking Note: This function will be called without the lport lock
1136 * held, but it will lock, call an _enter_* function or fc_lport_error
1137 * and then unlock the lport.
1139 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1142 struct fc_lport
*lport
= lp_arg
;
1145 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1147 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1150 mutex_lock(&lport
->lp_mutex
);
1152 if (lport
->state
!= LPORT_ST_SCR
) {
1153 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1154 "%s\n", fc_lport_state(lport
));
1161 fc_lport_error(lport
, fp
);
1165 op
= fc_frame_payload_op(fp
);
1166 if (op
== ELS_LS_ACC
)
1167 fc_lport_enter_ready(lport
);
1169 fc_lport_error(lport
, fp
);
1174 mutex_unlock(&lport
->lp_mutex
);
1178 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1179 * @lport: The local port to register for state changes
1181 * Locking Note: The lport lock is expected to be held before calling
1184 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1186 struct fc_frame
*fp
;
1188 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1189 fc_lport_state(lport
));
1191 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1193 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1195 fc_lport_error(lport
, fp
);
1199 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1200 fc_lport_scr_resp
, lport
,
1201 2 * lport
->r_a_tov
))
1202 fc_lport_error(lport
, NULL
);
1206 * fc_lport_enter_ns() - register some object with the name server
1207 * @lport: Fibre Channel local port to register
1209 * Locking Note: The lport lock is expected to be held before calling
1212 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1214 struct fc_frame
*fp
;
1216 int size
= sizeof(struct fc_ct_hdr
);
1219 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1220 fc_lport_state_names
[state
],
1221 fc_lport_state(lport
));
1223 fc_lport_state_enter(lport
, state
);
1226 case LPORT_ST_RNN_ID
:
1228 size
+= sizeof(struct fc_ns_rn_id
);
1230 case LPORT_ST_RSNN_NN
:
1231 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1232 /* if there is no symbolic name, skip to RFT_ID */
1234 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1235 cmd
= FC_NS_RSNN_NN
;
1236 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1238 case LPORT_ST_RSPN_ID
:
1239 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1240 /* if there is no symbolic name, skip to RFT_ID */
1242 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1243 cmd
= FC_NS_RSPN_ID
;
1244 size
+= sizeof(struct fc_ns_rspn
) + len
;
1246 case LPORT_ST_RFT_ID
:
1248 size
+= sizeof(struct fc_ns_rft
);
1250 case LPORT_ST_RFF_ID
:
1252 size
+= sizeof(struct fc_ns_rff_id
);
1255 fc_lport_error(lport
, NULL
);
1259 fp
= fc_frame_alloc(lport
, size
);
1261 fc_lport_error(lport
, fp
);
1265 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1267 lport
, 3 * lport
->r_a_tov
))
1268 fc_lport_error(lport
, fp
);
1271 static struct fc_rport_operations fc_lport_rport_ops
= {
1272 .event_callback
= fc_lport_rport_callback
,
1276 * fc_rport_enter_dns() - Create a fc_rport for the name server
1277 * @lport: The local port requesting a remote port for the name server
1279 * Locking Note: The lport lock is expected to be held before calling
1282 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1284 struct fc_rport_priv
*rdata
;
1286 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1287 fc_lport_state(lport
));
1289 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1291 mutex_lock(&lport
->disc
.disc_mutex
);
1292 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1293 mutex_unlock(&lport
->disc
.disc_mutex
);
1297 rdata
->ops
= &fc_lport_rport_ops
;
1298 lport
->tt
.rport_login(rdata
);
1302 fc_lport_error(lport
, NULL
);
1306 * fc_lport_timeout() - Handler for the retry_work timer
1307 * @work: The work struct of the local port
1309 static void fc_lport_timeout(struct work_struct
*work
)
1311 struct fc_lport
*lport
=
1312 container_of(work
, struct fc_lport
,
1315 mutex_lock(&lport
->lp_mutex
);
1317 switch (lport
->state
) {
1318 case LPORT_ST_DISABLED
:
1321 case LPORT_ST_READY
:
1324 case LPORT_ST_RESET
:
1326 case LPORT_ST_FLOGI
:
1327 fc_lport_enter_flogi(lport
);
1330 fc_lport_enter_dns(lport
);
1332 case LPORT_ST_RNN_ID
:
1333 case LPORT_ST_RSNN_NN
:
1334 case LPORT_ST_RSPN_ID
:
1335 case LPORT_ST_RFT_ID
:
1336 case LPORT_ST_RFF_ID
:
1337 fc_lport_enter_ns(lport
, lport
->state
);
1340 fc_lport_enter_scr(lport
);
1343 fc_lport_enter_logo(lport
);
1347 mutex_unlock(&lport
->lp_mutex
);
1351 * fc_lport_logo_resp() - Handle response to LOGO request
1352 * @sp: The sequence that the LOGO was on
1353 * @fp: The LOGO frame
1354 * @lp_arg: The lport port that received the LOGO request
1356 * Locking Note: This function will be called without the lport lock
1357 * held, but it will lock, call an _enter_* function or fc_lport_error()
1358 * and then unlock the lport.
1360 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1363 struct fc_lport
*lport
= lp_arg
;
1366 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1368 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1371 mutex_lock(&lport
->lp_mutex
);
1373 if (lport
->state
!= LPORT_ST_LOGO
) {
1374 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1375 "%s\n", fc_lport_state(lport
));
1382 fc_lport_error(lport
, fp
);
1386 op
= fc_frame_payload_op(fp
);
1387 if (op
== ELS_LS_ACC
)
1388 fc_lport_enter_disabled(lport
);
1390 fc_lport_error(lport
, fp
);
1395 mutex_unlock(&lport
->lp_mutex
);
1397 EXPORT_SYMBOL(fc_lport_logo_resp
);
1400 * fc_rport_enter_logo() - Logout of the fabric
1401 * @lport: The local port to be logged out
1403 * Locking Note: The lport lock is expected to be held before calling
1406 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1408 struct fc_frame
*fp
;
1409 struct fc_els_logo
*logo
;
1411 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1412 fc_lport_state(lport
));
1414 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1415 fc_vports_linkchange(lport
);
1417 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1419 fc_lport_error(lport
, fp
);
1423 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1424 fc_lport_logo_resp
, lport
,
1425 2 * lport
->r_a_tov
))
1426 fc_lport_error(lport
, NULL
);
1430 * fc_lport_flogi_resp() - Handle response to FLOGI request
1431 * @sp: The sequence that the FLOGI was on
1432 * @fp: The FLOGI response frame
1433 * @lp_arg: The lport port that received the FLOGI response
1435 * Locking Note: This function will be called without the lport lock
1436 * held, but it will lock, call an _enter_* function or fc_lport_error()
1437 * and then unlock the lport.
1439 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1442 struct fc_lport
*lport
= lp_arg
;
1443 struct fc_frame_header
*fh
;
1444 struct fc_els_flogi
*flp
;
1447 unsigned int r_a_tov
;
1448 unsigned int e_d_tov
;
1451 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1453 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1456 mutex_lock(&lport
->lp_mutex
);
1458 if (lport
->state
!= LPORT_ST_FLOGI
) {
1459 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1460 "%s\n", fc_lport_state(lport
));
1467 fc_lport_error(lport
, fp
);
1471 fh
= fc_frame_header_get(fp
);
1472 did
= ntoh24(fh
->fh_d_id
);
1473 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
!= 0) {
1474 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1476 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1478 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1481 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1482 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1483 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1484 if (csp_flags
& FC_SP_FT_EDTR
)
1487 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1489 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1490 if (e_d_tov
> lport
->e_d_tov
)
1491 lport
->e_d_tov
= e_d_tov
;
1492 lport
->r_a_tov
= 2 * e_d_tov
;
1493 fc_lport_set_port_id(lport
, did
, fp
);
1494 printk(KERN_INFO
"host%d: libfc: "
1495 "Port (%6.6x) entered "
1496 "point-to-point mode\n",
1497 lport
->host
->host_no
, did
);
1498 fc_lport_ptp_setup(lport
, ntoh24(fh
->fh_s_id
),
1504 lport
->e_d_tov
= e_d_tov
;
1505 lport
->r_a_tov
= r_a_tov
;
1506 fc_host_fabric_name(lport
->host
) =
1507 get_unaligned_be64(&flp
->fl_wwnn
);
1508 fc_lport_set_port_id(lport
, did
, fp
);
1509 fc_lport_enter_dns(lport
);
1513 FC_LPORT_DBG(lport
, "Bad FLOGI response\n");
1519 mutex_unlock(&lport
->lp_mutex
);
1521 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1524 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1525 * @lport: Fibre Channel local port to be logged in to the fabric
1527 * Locking Note: The lport lock is expected to be held before calling
1530 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1532 struct fc_frame
*fp
;
1534 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1535 fc_lport_state(lport
));
1537 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1539 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1541 return fc_lport_error(lport
, fp
);
1543 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1544 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1545 fc_lport_flogi_resp
, lport
,
1546 lport
->vport
? 2 * lport
->r_a_tov
:
1548 fc_lport_error(lport
, NULL
);
1552 * fc_lport_config() - Configure a fc_lport
1553 * @lport: The local port to be configured
1555 int fc_lport_config(struct fc_lport
*lport
)
1557 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1558 mutex_init(&lport
->lp_mutex
);
1560 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1562 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1563 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1567 EXPORT_SYMBOL(fc_lport_config
);
1570 * fc_lport_init() - Initialize the lport layer for a local port
1571 * @lport: The local port to initialize the exchange layer for
1573 int fc_lport_init(struct fc_lport
*lport
)
1575 if (!lport
->tt
.lport_recv
)
1576 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1578 if (!lport
->tt
.lport_reset
)
1579 lport
->tt
.lport_reset
= fc_lport_reset
;
1581 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1582 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1583 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1584 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1585 memset(fc_host_supported_fc4s(lport
->host
), 0,
1586 sizeof(fc_host_supported_fc4s(lport
->host
)));
1587 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1588 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1590 /* This value is also unchanging */
1591 memset(fc_host_active_fc4s(lport
->host
), 0,
1592 sizeof(fc_host_active_fc4s(lport
->host
)));
1593 fc_host_active_fc4s(lport
->host
)[2] = 1;
1594 fc_host_active_fc4s(lport
->host
)[7] = 1;
1595 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1596 fc_host_supported_speeds(lport
->host
) = 0;
1597 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1598 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1599 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1600 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1604 EXPORT_SYMBOL(fc_lport_init
);
1607 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1608 * @sp: The sequence for the FC Passthrough response
1609 * @fp: The response frame
1610 * @info_arg: The BSG info that the response is for
1612 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1615 struct fc_bsg_info
*info
= info_arg
;
1616 struct fc_bsg_job
*job
= info
->job
;
1617 struct fc_lport
*lport
= info
->lport
;
1618 struct fc_frame_header
*fh
;
1623 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1624 -ECONNABORTED
: -ETIMEDOUT
;
1625 job
->reply_len
= sizeof(uint32_t);
1626 job
->state_flags
|= FC_RQST_STATE_DONE
;
1632 mutex_lock(&lport
->lp_mutex
);
1633 fh
= fc_frame_header_get(fp
);
1634 len
= fr_len(fp
) - sizeof(*fh
);
1635 buf
= fc_frame_payload_get(fp
, 0);
1637 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1638 /* Get the response code from the first frame payload */
1639 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1640 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1641 (unsigned short)fc_frame_payload_op(fp
);
1643 /* Save the reply status of the job */
1644 job
->reply
->reply_data
.ctels_reply
.status
=
1645 (cmd
== info
->rsp_code
) ?
1646 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1649 job
->reply
->reply_payload_rcv_len
+=
1650 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1651 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1653 if (fr_eof(fp
) == FC_EOF_T
&&
1654 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1655 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1656 if (job
->reply
->reply_payload_rcv_len
>
1657 job
->reply_payload
.payload_len
)
1658 job
->reply
->reply_payload_rcv_len
=
1659 job
->reply_payload
.payload_len
;
1660 job
->reply
->result
= 0;
1661 job
->state_flags
|= FC_RQST_STATE_DONE
;
1666 mutex_unlock(&lport
->lp_mutex
);
1670 * fc_lport_els_request() - Send ELS passthrough request
1671 * @job: The BSG Passthrough job
1672 * @lport: The local port sending the request
1673 * @did: The destination port id
1675 * Locking Note: The lport lock is expected to be held before calling
1678 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1679 struct fc_lport
*lport
,
1682 struct fc_bsg_info
*info
;
1683 struct fc_frame
*fp
;
1684 struct fc_frame_header
*fh
;
1688 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1692 len
= job
->request_payload
.payload_len
;
1693 pp
= fc_frame_payload_get(fp
, len
);
1695 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1696 job
->request_payload
.sg_cnt
,
1699 fh
= fc_frame_header_get(fp
);
1700 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1701 hton24(fh
->fh_d_id
, did
);
1702 hton24(fh
->fh_s_id
, lport
->port_id
);
1703 fh
->fh_type
= FC_TYPE_ELS
;
1704 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1705 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1708 fh
->fh_parm_offset
= 0;
1710 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1717 info
->lport
= lport
;
1718 info
->rsp_code
= ELS_LS_ACC
;
1719 info
->nents
= job
->reply_payload
.sg_cnt
;
1720 info
->sg
= job
->reply_payload
.sg_list
;
1722 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1729 * fc_lport_ct_request() - Send CT Passthrough request
1730 * @job: The BSG Passthrough job
1731 * @lport: The local port sending the request
1732 * @did: The destination FC-ID
1733 * @tov: The timeout period to wait for the response
1735 * Locking Note: The lport lock is expected to be held before calling
1738 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1739 struct fc_lport
*lport
, u32 did
, u32 tov
)
1741 struct fc_bsg_info
*info
;
1742 struct fc_frame
*fp
;
1743 struct fc_frame_header
*fh
;
1744 struct fc_ct_req
*ct
;
1747 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1748 job
->request_payload
.payload_len
);
1752 len
= job
->request_payload
.payload_len
;
1753 ct
= fc_frame_payload_get(fp
, len
);
1755 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1756 job
->request_payload
.sg_cnt
,
1759 fh
= fc_frame_header_get(fp
);
1760 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1761 hton24(fh
->fh_d_id
, did
);
1762 hton24(fh
->fh_s_id
, lport
->port_id
);
1763 fh
->fh_type
= FC_TYPE_CT
;
1764 hton24(fh
->fh_f_ctl
, FC_FC_FIRST_SEQ
|
1765 FC_FC_END_SEQ
| FC_FC_SEQ_INIT
);
1768 fh
->fh_parm_offset
= 0;
1770 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1777 info
->lport
= lport
;
1778 info
->rsp_code
= FC_FS_ACC
;
1779 info
->nents
= job
->reply_payload
.sg_cnt
;
1780 info
->sg
= job
->reply_payload
.sg_list
;
1782 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1789 * fc_lport_bsg_request() - The common entry point for sending
1790 * FC Passthrough requests
1791 * @job: The BSG passthrough job
1793 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1795 struct request
*rsp
= job
->req
->next_rq
;
1796 struct Scsi_Host
*shost
= job
->shost
;
1797 struct fc_lport
*lport
= shost_priv(shost
);
1798 struct fc_rport
*rport
;
1799 struct fc_rport_priv
*rdata
;
1803 job
->reply
->reply_payload_rcv_len
= 0;
1805 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1807 mutex_lock(&lport
->lp_mutex
);
1809 switch (job
->request
->msgcode
) {
1810 case FC_BSG_RPT_ELS
:
1815 rdata
= rport
->dd_data
;
1816 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1825 rdata
= rport
->dd_data
;
1826 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1831 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1832 if (did
== FC_FID_DIR_SERV
)
1833 rdata
= lport
->dns_rdata
;
1835 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1840 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1843 case FC_BSG_HST_ELS_NOLOGIN
:
1844 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1845 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1849 mutex_unlock(&lport
->lp_mutex
);
1852 EXPORT_SYMBOL(fc_lport_bsg_request
);