2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
28 * The lport, disc and rport blocks all have mutexes that are used to protect
29 * those objects. The main motivation for these locks is to prevent from
30 * having an lport reset just before we send a frame. In that scenario the
31 * lport's FID would get set to zero and then we'd send a frame with an
32 * invalid SID. We also need to ensure that states don't change unexpectedly
33 * while processing another state.
37 * The following hierarchy defines the locking rules. A greater lock
38 * may be held before acquiring a lesser lock, but a lesser lock should never
39 * be held while attempting to acquire a greater lock. Here is the hierarchy-
41 * lport > disc, lport > rport, disc > rport
45 * The callbacks cause complications with this scheme. There is a callback
46 * from the rport (to either lport or disc) and a callback from disc
49 * As rports exit the rport state machine a callback is made to the owner of
50 * the rport to notify success or failure. Since the callback is likely to
51 * cause the lport or disc to grab its lock we cannot hold the rport lock
52 * while making the callback. To ensure that the rport is not free'd while
53 * processing the callback the rport callbacks are serialized through a
54 * single-threaded workqueue. An rport would never be free'd while in a
55 * callback handler because 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/delay.h>
92 #include <linux/module.h>
93 #include <linux/slab.h>
94 #include <asm/unaligned.h>
96 #include <scsi/fc/fc_gs.h>
98 #include <scsi/libfc.h>
99 #include <scsi/fc_encode.h>
100 #include <linux/scatterlist.h>
102 #include "fc_libfc.h"
104 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
105 #define FC_LOCAL_PTP_FID_LO 0x010101
106 #define FC_LOCAL_PTP_FID_HI 0x010102
108 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
110 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
112 static void fc_lport_enter_reset(struct fc_lport
*);
113 static void fc_lport_enter_flogi(struct fc_lport
*);
114 static void fc_lport_enter_dns(struct fc_lport
*);
115 static void fc_lport_enter_ns(struct fc_lport
*, enum fc_lport_state
);
116 static void fc_lport_enter_scr(struct fc_lport
*);
117 static void fc_lport_enter_ready(struct fc_lport
*);
118 static void fc_lport_enter_logo(struct fc_lport
*);
120 static const char *fc_lport_state_names
[] = {
121 [LPORT_ST_DISABLED
] = "disabled",
122 [LPORT_ST_FLOGI
] = "FLOGI",
123 [LPORT_ST_DNS
] = "dNS",
124 [LPORT_ST_RNN_ID
] = "RNN_ID",
125 [LPORT_ST_RSNN_NN
] = "RSNN_NN",
126 [LPORT_ST_RSPN_ID
] = "RSPN_ID",
127 [LPORT_ST_RFT_ID
] = "RFT_ID",
128 [LPORT_ST_RFF_ID
] = "RFF_ID",
129 [LPORT_ST_SCR
] = "SCR",
130 [LPORT_ST_READY
] = "Ready",
131 [LPORT_ST_LOGO
] = "LOGO",
132 [LPORT_ST_RESET
] = "reset",
136 * struct fc_bsg_info - FC Passthrough managemet structure
137 * @job: The passthrough job
138 * @lport: The local port to pass through a command
139 * @rsp_code: The expected response code
140 * @sg: job->reply_payload.sg_list
141 * @nents: job->reply_payload.sg_cnt
142 * @offset: The offset into the response data
145 struct fc_bsg_job
*job
;
146 struct fc_lport
*lport
;
148 struct scatterlist
*sg
;
154 * fc_frame_drop() - Dummy frame handler
155 * @lport: The local port the frame was received on
156 * @fp: The received frame
158 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
165 * fc_lport_rport_callback() - Event handler for rport events
166 * @lport: The lport which is receiving the event
167 * @rdata: private remote port data
168 * @event: The event that occurred
170 * Locking Note: The rport lock should not be held when calling
173 static void fc_lport_rport_callback(struct fc_lport
*lport
,
174 struct fc_rport_priv
*rdata
,
175 enum fc_rport_event event
)
177 FC_LPORT_DBG(lport
, "Received a %d event for port (%6.6x)\n", event
,
180 mutex_lock(&lport
->lp_mutex
);
183 if (lport
->state
== LPORT_ST_DNS
) {
184 lport
->dns_rdata
= rdata
;
185 fc_lport_enter_ns(lport
, LPORT_ST_RNN_ID
);
187 FC_LPORT_DBG(lport
, "Received an READY event "
188 "on port (%6.6x) for the directory "
189 "server, but the lport is not "
190 "in the DNS state, it's in the "
191 "%d state", rdata
->ids
.port_id
,
193 lport
->tt
.rport_logoff(rdata
);
197 case RPORT_EV_FAILED
:
199 lport
->dns_rdata
= NULL
;
204 mutex_unlock(&lport
->lp_mutex
);
208 * fc_lport_state() - Return a string which represents the lport's state
209 * @lport: The lport whose state is to converted to a string
211 static const char *fc_lport_state(struct fc_lport
*lport
)
215 cp
= fc_lport_state_names
[lport
->state
];
222 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
223 * @lport: The lport to attach the ptp rport to
224 * @remote_fid: The FID of the ptp rport
225 * @remote_wwpn: The WWPN of the ptp rport
226 * @remote_wwnn: The WWNN of the ptp rport
228 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
229 u32 remote_fid
, u64 remote_wwpn
,
232 mutex_lock(&lport
->disc
.disc_mutex
);
233 if (lport
->ptp_rdata
) {
234 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
235 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
237 lport
->ptp_rdata
= lport
->tt
.rport_create(lport
, remote_fid
);
238 kref_get(&lport
->ptp_rdata
->kref
);
239 lport
->ptp_rdata
->ids
.port_name
= remote_wwpn
;
240 lport
->ptp_rdata
->ids
.node_name
= remote_wwnn
;
241 mutex_unlock(&lport
->disc
.disc_mutex
);
243 lport
->tt
.rport_login(lport
->ptp_rdata
);
245 fc_lport_enter_ready(lport
);
249 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
250 * @shost: The SCSI host whose port state is to be determined
252 void fc_get_host_port_state(struct Scsi_Host
*shost
)
254 struct fc_lport
*lport
= shost_priv(shost
);
256 mutex_lock(&lport
->lp_mutex
);
258 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
260 switch (lport
->state
) {
262 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
265 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
267 mutex_unlock(&lport
->lp_mutex
);
269 EXPORT_SYMBOL(fc_get_host_port_state
);
272 * fc_get_host_speed() - Return the speed of the given Scsi_Host
273 * @shost: The SCSI host whose port speed is to be determined
275 void fc_get_host_speed(struct Scsi_Host
*shost
)
277 struct fc_lport
*lport
= shost_priv(shost
);
279 fc_host_speed(shost
) = lport
->link_speed
;
281 EXPORT_SYMBOL(fc_get_host_speed
);
284 * fc_get_host_stats() - Return the Scsi_Host's statistics
285 * @shost: The SCSI host whose statistics are to be returned
287 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
289 struct fc_host_statistics
*fcoe_stats
;
290 struct fc_lport
*lport
= shost_priv(shost
);
291 struct timespec v0
, v1
;
293 u64 fcp_in_bytes
= 0;
294 u64 fcp_out_bytes
= 0;
296 fcoe_stats
= &lport
->host_stats
;
297 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
299 jiffies_to_timespec(jiffies
, &v0
);
300 jiffies_to_timespec(lport
->boot_time
, &v1
);
301 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
303 for_each_possible_cpu(cpu
) {
304 struct fcoe_dev_stats
*stats
;
306 stats
= per_cpu_ptr(lport
->dev_stats
, cpu
);
308 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
309 fcoe_stats
->tx_words
+= stats
->TxWords
;
310 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
311 fcoe_stats
->rx_words
+= stats
->RxWords
;
312 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
313 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
314 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
315 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
316 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
317 fcp_in_bytes
+= stats
->InputBytes
;
318 fcp_out_bytes
+= stats
->OutputBytes
;
319 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
321 fcoe_stats
->fcp_input_megabytes
= div_u64(fcp_in_bytes
, 1000000);
322 fcoe_stats
->fcp_output_megabytes
= div_u64(fcp_out_bytes
, 1000000);
323 fcoe_stats
->lip_count
= -1;
324 fcoe_stats
->nos_count
= -1;
325 fcoe_stats
->loss_of_sync_count
= -1;
326 fcoe_stats
->loss_of_signal_count
= -1;
327 fcoe_stats
->prim_seq_protocol_err_count
= -1;
328 fcoe_stats
->dumped_frames
= -1;
331 EXPORT_SYMBOL(fc_get_host_stats
);
334 * fc_lport_flogi_fill() - Fill in FLOGI command for request
335 * @lport: The local port the FLOGI is for
336 * @flogi: The FLOGI command
339 static void fc_lport_flogi_fill(struct fc_lport
*lport
,
340 struct fc_els_flogi
*flogi
,
343 struct fc_els_csp
*sp
;
344 struct fc_els_cssp
*cp
;
346 memset(flogi
, 0, sizeof(*flogi
));
347 flogi
->fl_cmd
= (u8
) op
;
348 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
349 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
351 sp
->sp_hi_ver
= 0x20;
352 sp
->sp_lo_ver
= 0x20;
353 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
354 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
355 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
356 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
357 if (op
!= ELS_FLOGI
) {
358 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
359 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
360 sp
->sp_rel_off
= htons(0x1f);
361 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
363 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
364 cp
->cp_con_seq
= htons(255);
370 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
371 * @lport: The local port to add a new FC-4 type to
372 * @type: The new FC-4 type
374 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
378 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
379 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
383 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
384 * @lport: Fibre Channel local port receiving the RLIR
385 * @fp: The RLIR request frame
387 * Locking Note: The lport lock is expected to be held before calling
390 static void fc_lport_recv_rlir_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
392 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
393 fc_lport_state(lport
));
395 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
400 * fc_lport_recv_echo_req() - Handle received ECHO request
401 * @lport: The local port receiving the ECHO
402 * @fp: ECHO request frame
404 * Locking Note: The lport lock is expected to be held before calling
407 static void fc_lport_recv_echo_req(struct fc_lport
*lport
,
408 struct fc_frame
*in_fp
)
415 FC_LPORT_DBG(lport
, "Received ECHO request while in state %s\n",
416 fc_lport_state(lport
));
418 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
419 pp
= fc_frame_payload_get(in_fp
, len
);
421 if (len
< sizeof(__be32
))
422 len
= sizeof(__be32
);
424 fp
= fc_frame_alloc(lport
, len
);
426 dp
= fc_frame_payload_get(fp
, len
);
428 *((__be32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
429 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
430 lport
->tt
.frame_send(lport
, fp
);
432 fc_frame_free(in_fp
);
436 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
437 * @lport: The local port receiving the RNID
438 * @fp: The RNID request frame
440 * Locking Note: The lport lock is expected to be held before calling
443 static void fc_lport_recv_rnid_req(struct fc_lport
*lport
,
444 struct fc_frame
*in_fp
)
447 struct fc_els_rnid
*req
;
449 struct fc_els_rnid_resp rnid
;
450 struct fc_els_rnid_cid cid
;
451 struct fc_els_rnid_gen gen
;
453 struct fc_seq_els_data rjt_data
;
457 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
458 fc_lport_state(lport
));
460 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
462 rjt_data
.reason
= ELS_RJT_LOGIC
;
463 rjt_data
.explan
= ELS_EXPL_NONE
;
464 lport
->tt
.seq_els_rsp_send(in_fp
, ELS_LS_RJT
, &rjt_data
);
468 if (fmt
!= ELS_RNIDF_GEN
||
469 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
470 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
471 len
-= sizeof(rp
->gen
);
473 fp
= fc_frame_alloc(lport
, len
);
475 rp
= fc_frame_payload_get(fp
, len
);
477 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
478 rp
->rnid
.rnid_fmt
= fmt
;
479 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
480 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
481 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
482 if (fmt
== ELS_RNIDF_GEN
) {
483 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
484 memcpy(&rp
->gen
, &lport
->rnid_gen
,
487 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
488 lport
->tt
.frame_send(lport
, fp
);
491 fc_frame_free(in_fp
);
495 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
496 * @lport: The local port receiving the LOGO
497 * @fp: The LOGO request frame
499 * Locking Note: The lport lock is exected to be held before calling
502 static void fc_lport_recv_logo_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
504 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
505 fc_lport_enter_reset(lport
);
510 * fc_fabric_login() - Start the lport state machine
511 * @lport: The local port that should log into the fabric
513 * Locking Note: This function should not be called
514 * with the lport lock held.
516 int fc_fabric_login(struct fc_lport
*lport
)
520 mutex_lock(&lport
->lp_mutex
);
521 if (lport
->state
== LPORT_ST_DISABLED
||
522 lport
->state
== LPORT_ST_LOGO
) {
523 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
524 fc_lport_enter_reset(lport
);
527 mutex_unlock(&lport
->lp_mutex
);
531 EXPORT_SYMBOL(fc_fabric_login
);
534 * __fc_linkup() - Handler for transport linkup events
535 * @lport: The lport whose link is up
537 * Locking: must be called with the lp_mutex held
539 void __fc_linkup(struct fc_lport
*lport
)
541 if (!lport
->link_up
) {
544 if (lport
->state
== LPORT_ST_RESET
)
545 fc_lport_enter_flogi(lport
);
550 * fc_linkup() - Handler for transport linkup events
551 * @lport: The local port whose link is up
553 void fc_linkup(struct fc_lport
*lport
)
555 printk(KERN_INFO
"host%d: libfc: Link up on port (%6.6x)\n",
556 lport
->host
->host_no
, lport
->port_id
);
558 mutex_lock(&lport
->lp_mutex
);
560 mutex_unlock(&lport
->lp_mutex
);
562 EXPORT_SYMBOL(fc_linkup
);
565 * __fc_linkdown() - Handler for transport linkdown events
566 * @lport: The lport whose link is down
568 * Locking: must be called with the lp_mutex held
570 void __fc_linkdown(struct fc_lport
*lport
)
572 if (lport
->link_up
) {
574 fc_lport_enter_reset(lport
);
575 lport
->tt
.fcp_cleanup(lport
);
580 * fc_linkdown() - Handler for transport linkdown events
581 * @lport: The local port whose link is down
583 void fc_linkdown(struct fc_lport
*lport
)
585 printk(KERN_INFO
"host%d: libfc: Link down on port (%6.6x)\n",
586 lport
->host
->host_no
, lport
->port_id
);
588 mutex_lock(&lport
->lp_mutex
);
589 __fc_linkdown(lport
);
590 mutex_unlock(&lport
->lp_mutex
);
592 EXPORT_SYMBOL(fc_linkdown
);
595 * fc_fabric_logoff() - Logout of the fabric
596 * @lport: The local port to logoff the fabric
599 * 0 for success, -1 for failure
601 int fc_fabric_logoff(struct fc_lport
*lport
)
603 lport
->tt
.disc_stop_final(lport
);
604 mutex_lock(&lport
->lp_mutex
);
605 if (lport
->dns_rdata
)
606 lport
->tt
.rport_logoff(lport
->dns_rdata
);
607 mutex_unlock(&lport
->lp_mutex
);
608 lport
->tt
.rport_flush_queue();
609 mutex_lock(&lport
->lp_mutex
);
610 fc_lport_enter_logo(lport
);
611 mutex_unlock(&lport
->lp_mutex
);
612 cancel_delayed_work_sync(&lport
->retry_work
);
615 EXPORT_SYMBOL(fc_fabric_logoff
);
618 * fc_lport_destroy() - Unregister a fc_lport
619 * @lport: The local port to unregister
622 * exit routine for fc_lport instance
623 * clean-up all the allocated memory
624 * and free up other system resources.
627 int fc_lport_destroy(struct fc_lport
*lport
)
629 mutex_lock(&lport
->lp_mutex
);
630 lport
->state
= LPORT_ST_DISABLED
;
632 lport
->tt
.frame_send
= fc_frame_drop
;
633 mutex_unlock(&lport
->lp_mutex
);
635 lport
->tt
.fcp_abort_io(lport
);
636 lport
->tt
.disc_stop_final(lport
);
637 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
638 fc_fc4_del_lport(lport
);
641 EXPORT_SYMBOL(fc_lport_destroy
);
644 * fc_set_mfs() - Set the maximum frame size for a local port
645 * @lport: The local port to set the MFS for
648 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
650 unsigned int old_mfs
;
653 mutex_lock(&lport
->lp_mutex
);
655 old_mfs
= lport
->mfs
;
657 if (mfs
>= FC_MIN_MAX_FRAME
) {
659 if (mfs
> FC_MAX_FRAME
)
661 mfs
-= sizeof(struct fc_frame_header
);
666 if (!rc
&& mfs
< old_mfs
)
667 fc_lport_enter_reset(lport
);
669 mutex_unlock(&lport
->lp_mutex
);
673 EXPORT_SYMBOL(fc_set_mfs
);
676 * fc_lport_disc_callback() - Callback for discovery events
677 * @lport: The local port receiving the event
678 * @event: The discovery event
680 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
683 case DISC_EV_SUCCESS
:
684 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
687 printk(KERN_ERR
"host%d: libfc: "
688 "Discovery failed for port (%6.6x)\n",
689 lport
->host
->host_no
, lport
->port_id
);
690 mutex_lock(&lport
->lp_mutex
);
691 fc_lport_enter_reset(lport
);
692 mutex_unlock(&lport
->lp_mutex
);
701 * fc_rport_enter_ready() - Enter the ready state and start discovery
702 * @lport: The local port that is ready
704 * Locking Note: The lport lock is expected to be held before calling
707 static void fc_lport_enter_ready(struct fc_lport
*lport
)
709 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
710 fc_lport_state(lport
));
712 fc_lport_state_enter(lport
, LPORT_ST_READY
);
714 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
715 fc_vports_linkchange(lport
);
717 if (!lport
->ptp_rdata
)
718 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
722 * fc_lport_set_port_id() - set the local port Port ID
723 * @lport: The local port which will have its Port ID set.
724 * @port_id: The new port ID.
725 * @fp: The frame containing the incoming request, or NULL.
727 * Locking Note: The lport lock is expected to be held before calling
730 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
734 printk(KERN_INFO
"host%d: Assigned Port ID %6.6x\n",
735 lport
->host
->host_no
, port_id
);
737 lport
->port_id
= port_id
;
739 /* Update the fc_host */
740 fc_host_port_id(lport
->host
) = port_id
;
742 if (lport
->tt
.lport_set_port_id
)
743 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
747 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
748 * @lport: The local port which will have its Port ID set.
749 * @port_id: The new port ID.
751 * Called by the lower-level driver when transport sets the local port_id.
752 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
753 * discovery to be skipped.
755 void fc_lport_set_local_id(struct fc_lport
*lport
, u32 port_id
)
757 mutex_lock(&lport
->lp_mutex
);
759 fc_lport_set_port_id(lport
, port_id
, NULL
);
761 switch (lport
->state
) {
765 fc_lport_enter_ready(lport
);
770 mutex_unlock(&lport
->lp_mutex
);
772 EXPORT_SYMBOL(fc_lport_set_local_id
);
775 * fc_lport_recv_flogi_req() - Receive a FLOGI request
776 * @lport: The local port that received the request
777 * @rx_fp: The FLOGI frame
779 * A received FLOGI request indicates a point-to-point connection.
780 * Accept it with the common service parameters indicating our N port.
781 * Set up to do a PLOGI if we have the higher-number WWPN.
783 * Locking Note: The lport lock is expected to be held before calling
786 static void fc_lport_recv_flogi_req(struct fc_lport
*lport
,
787 struct fc_frame
*rx_fp
)
790 struct fc_frame_header
*fh
;
791 struct fc_els_flogi
*flp
;
792 struct fc_els_flogi
*new_flp
;
797 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
798 fc_lport_state(lport
));
800 remote_fid
= fc_frame_sid(rx_fp
);
801 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
804 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
805 if (remote_wwpn
== lport
->wwpn
) {
806 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
807 "with same WWPN %16.16llx\n",
808 lport
->host
->host_no
, remote_wwpn
);
811 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
814 * XXX what is the right thing to do for FIDs?
815 * The originator might expect our S_ID to be 0xfffffe.
816 * But if so, both of us could end up with the same FID.
818 local_fid
= FC_LOCAL_PTP_FID_LO
;
819 if (remote_wwpn
< lport
->wwpn
) {
820 local_fid
= FC_LOCAL_PTP_FID_HI
;
821 if (!remote_fid
|| remote_fid
== local_fid
)
822 remote_fid
= FC_LOCAL_PTP_FID_LO
;
823 } else if (!remote_fid
) {
824 remote_fid
= FC_LOCAL_PTP_FID_HI
;
827 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
829 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
831 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
832 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
833 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
836 * Send the response. If this fails, the originator should
837 * repeat the sequence.
839 fc_fill_reply_hdr(fp
, rx_fp
, FC_RCTL_ELS_REP
, 0);
840 fh
= fc_frame_header_get(fp
);
841 hton24(fh
->fh_s_id
, local_fid
);
842 hton24(fh
->fh_d_id
, remote_fid
);
843 lport
->tt
.frame_send(lport
, fp
);
846 fc_lport_error(lport
, fp
);
848 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
849 get_unaligned_be64(&flp
->fl_wwnn
));
851 fc_frame_free(rx_fp
);
855 * fc_lport_recv_els_req() - The generic lport ELS request handler
856 * @lport: The local port that received the request
857 * @fp: The request frame
859 * This function will see if the lport handles the request or
860 * if an rport should handle the request.
862 * Locking Note: This function should not be called with the lport
863 * lock held because it will grab the lock.
865 static void fc_lport_recv_els_req(struct fc_lport
*lport
,
868 void (*recv
)(struct fc_lport
*, struct fc_frame
*);
870 mutex_lock(&lport
->lp_mutex
);
873 * Handle special ELS cases like FLOGI, LOGO, and
874 * RSCN here. These don't require a session.
875 * Even if we had a session, it might not be ready.
883 recv
= lport
->tt
.rport_recv_req
;
884 switch (fc_frame_payload_op(fp
)) {
886 if (!lport
->point_to_multipoint
)
887 recv
= fc_lport_recv_flogi_req
;
890 if (fc_frame_sid(fp
) == FC_FID_FLOGI
)
891 recv
= fc_lport_recv_logo_req
;
894 recv
= lport
->tt
.disc_recv_req
;
897 recv
= fc_lport_recv_echo_req
;
900 recv
= fc_lport_recv_rlir_req
;
903 recv
= fc_lport_recv_rnid_req
;
909 mutex_unlock(&lport
->lp_mutex
);
912 static int fc_lport_els_prli(struct fc_rport_priv
*rdata
, u32 spp_len
,
913 const struct fc_els_spp
*spp_in
,
914 struct fc_els_spp
*spp_out
)
916 return FC_SPP_RESP_INVL
;
919 struct fc4_prov fc_lport_els_prov
= {
920 .prli
= fc_lport_els_prli
,
921 .recv
= fc_lport_recv_els_req
,
925 * fc_lport_recv_req() - The generic lport request handler
926 * @lport: The lport that received the request
927 * @fp: The frame the request is in
929 * Locking Note: This function should not be called with the lport
930 * lock held because it may grab the lock.
932 static void fc_lport_recv_req(struct fc_lport
*lport
,
935 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
936 struct fc_seq
*sp
= fr_seq(fp
);
937 struct fc4_prov
*prov
;
940 * Use RCU read lock and module_lock to be sure module doesn't
941 * deregister and get unloaded while we're calling it.
942 * try_module_get() is inlined and accepts a NULL parameter.
943 * Only ELSes and FCP target ops should come through here.
944 * The locking is unfortunate, and a better scheme is being sought.
948 if (fh
->fh_type
>= FC_FC4_PROV_SIZE
)
950 prov
= rcu_dereference(fc_passive_prov
[fh
->fh_type
]);
951 if (!prov
|| !try_module_get(prov
->module
))
954 prov
->recv(lport
, fp
);
955 module_put(prov
->module
);
959 FC_LPORT_DBG(lport
, "dropping unexpected frame type %x\n", fh
->fh_type
);
961 lport
->tt
.exch_done(sp
);
965 * fc_lport_reset() - Reset a local port
966 * @lport: The local port which should be reset
968 * Locking Note: This functions should not be called with the
971 int fc_lport_reset(struct fc_lport
*lport
)
973 cancel_delayed_work_sync(&lport
->retry_work
);
974 mutex_lock(&lport
->lp_mutex
);
975 fc_lport_enter_reset(lport
);
976 mutex_unlock(&lport
->lp_mutex
);
979 EXPORT_SYMBOL(fc_lport_reset
);
982 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
983 * @lport: The local port to be reset
985 * Locking Note: The lport lock is expected to be held before calling
988 static void fc_lport_reset_locked(struct fc_lport
*lport
)
990 if (lport
->dns_rdata
)
991 lport
->tt
.rport_logoff(lport
->dns_rdata
);
993 if (lport
->ptp_rdata
) {
994 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
995 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
996 lport
->ptp_rdata
= NULL
;
999 lport
->tt
.disc_stop(lport
);
1001 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
1002 fc_host_fabric_name(lport
->host
) = 0;
1004 if (lport
->port_id
&& (!lport
->point_to_multipoint
|| !lport
->link_up
))
1005 fc_lport_set_port_id(lport
, 0, NULL
);
1009 * fc_lport_enter_reset() - Reset the local port
1010 * @lport: The local port to be reset
1012 * Locking Note: The lport lock is expected to be held before calling
1015 static void fc_lport_enter_reset(struct fc_lport
*lport
)
1017 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
1018 fc_lport_state(lport
));
1020 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
1025 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
1027 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
1029 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
1030 fc_host_post_event(lport
->host
, fc_get_event_number(),
1031 FCH_EVT_LIPRESET
, 0);
1032 fc_vports_linkchange(lport
);
1033 fc_lport_reset_locked(lport
);
1034 if (lport
->link_up
) {
1036 * Wait upto resource allocation time out before
1037 * doing re-login since incomplete FIP exchanged
1038 * from last session may collide with exchanges
1041 msleep(lport
->r_a_tov
);
1042 fc_lport_enter_flogi(lport
);
1047 * fc_lport_enter_disabled() - Disable the local port
1048 * @lport: The local port to be reset
1050 * Locking Note: The lport lock is expected to be held before calling
1053 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
1055 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
1056 fc_lport_state(lport
));
1058 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1059 fc_vports_linkchange(lport
);
1060 fc_lport_reset_locked(lport
);
1064 * fc_lport_error() - Handler for any errors
1065 * @lport: The local port that the error was on
1066 * @fp: The error code encoded in a frame pointer
1068 * If the error was caused by a resource allocation failure
1069 * then wait for half a second and retry, otherwise retry
1070 * after the e_d_tov time.
1072 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1074 unsigned long delay
= 0;
1075 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1076 PTR_ERR(fp
), fc_lport_state(lport
),
1077 lport
->retry_count
);
1079 if (PTR_ERR(fp
) == -FC_EX_CLOSED
)
1083 * Memory allocation failure, or the exchange timed out
1084 * or we received LS_RJT.
1087 if (lport
->retry_count
< lport
->max_retry_count
) {
1088 lport
->retry_count
++;
1090 delay
= msecs_to_jiffies(500);
1092 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1094 schedule_delayed_work(&lport
->retry_work
, delay
);
1096 fc_lport_enter_reset(lport
);
1100 * fc_lport_ns_resp() - Handle response to a name server
1101 * registration exchange
1102 * @sp: current sequence in exchange
1103 * @fp: response frame
1104 * @lp_arg: Fibre Channel host port instance
1106 * Locking Note: This function will be called without the lport lock
1107 * held, but it will lock, call an _enter_* function or fc_lport_error()
1108 * and then unlock the lport.
1110 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1113 struct fc_lport
*lport
= lp_arg
;
1114 struct fc_frame_header
*fh
;
1115 struct fc_ct_hdr
*ct
;
1117 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1119 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1122 mutex_lock(&lport
->lp_mutex
);
1124 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1125 FC_LPORT_DBG(lport
, "Received a name server response, "
1126 "but in state %s\n", fc_lport_state(lport
));
1133 fc_lport_error(lport
, fp
);
1137 fh
= fc_frame_header_get(fp
);
1138 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1140 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1141 ct
->ct_fs_type
== FC_FST_DIR
&&
1142 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1143 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1144 switch (lport
->state
) {
1145 case LPORT_ST_RNN_ID
:
1146 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1148 case LPORT_ST_RSNN_NN
:
1149 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1151 case LPORT_ST_RSPN_ID
:
1152 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1154 case LPORT_ST_RFT_ID
:
1155 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1157 case LPORT_ST_RFF_ID
:
1158 fc_lport_enter_scr(lport
);
1161 /* should have already been caught by state checks */
1165 fc_lport_error(lport
, fp
);
1169 mutex_unlock(&lport
->lp_mutex
);
1173 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1174 * @sp: current sequence in SCR exchange
1175 * @fp: response frame
1176 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1178 * Locking Note: This function will be called without the lport lock
1179 * held, but it will lock, call an _enter_* function or fc_lport_error
1180 * and then unlock the lport.
1182 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1185 struct fc_lport
*lport
= lp_arg
;
1188 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1190 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1193 mutex_lock(&lport
->lp_mutex
);
1195 if (lport
->state
!= LPORT_ST_SCR
) {
1196 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1197 "%s\n", fc_lport_state(lport
));
1204 fc_lport_error(lport
, fp
);
1208 op
= fc_frame_payload_op(fp
);
1209 if (op
== ELS_LS_ACC
)
1210 fc_lport_enter_ready(lport
);
1212 fc_lport_error(lport
, fp
);
1217 mutex_unlock(&lport
->lp_mutex
);
1221 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1222 * @lport: The local port to register for state changes
1224 * Locking Note: The lport lock is expected to be held before calling
1227 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1229 struct fc_frame
*fp
;
1231 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1232 fc_lport_state(lport
));
1234 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1236 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1238 fc_lport_error(lport
, fp
);
1242 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1243 fc_lport_scr_resp
, lport
,
1244 2 * lport
->r_a_tov
))
1245 fc_lport_error(lport
, NULL
);
1249 * fc_lport_enter_ns() - register some object with the name server
1250 * @lport: Fibre Channel local port to register
1252 * Locking Note: The lport lock is expected to be held before calling
1255 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1257 struct fc_frame
*fp
;
1259 int size
= sizeof(struct fc_ct_hdr
);
1262 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1263 fc_lport_state_names
[state
],
1264 fc_lport_state(lport
));
1266 fc_lport_state_enter(lport
, state
);
1269 case LPORT_ST_RNN_ID
:
1271 size
+= sizeof(struct fc_ns_rn_id
);
1273 case LPORT_ST_RSNN_NN
:
1274 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1275 /* if there is no symbolic name, skip to RFT_ID */
1277 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1278 cmd
= FC_NS_RSNN_NN
;
1279 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1281 case LPORT_ST_RSPN_ID
:
1282 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1283 /* if there is no symbolic name, skip to RFT_ID */
1285 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1286 cmd
= FC_NS_RSPN_ID
;
1287 size
+= sizeof(struct fc_ns_rspn
) + len
;
1289 case LPORT_ST_RFT_ID
:
1291 size
+= sizeof(struct fc_ns_rft
);
1293 case LPORT_ST_RFF_ID
:
1295 size
+= sizeof(struct fc_ns_rff_id
);
1298 fc_lport_error(lport
, NULL
);
1302 fp
= fc_frame_alloc(lport
, size
);
1304 fc_lport_error(lport
, fp
);
1308 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1310 lport
, 3 * lport
->r_a_tov
))
1311 fc_lport_error(lport
, fp
);
1314 static struct fc_rport_operations fc_lport_rport_ops
= {
1315 .event_callback
= fc_lport_rport_callback
,
1319 * fc_rport_enter_dns() - Create a fc_rport for the name server
1320 * @lport: The local port requesting a remote port for the name server
1322 * Locking Note: The lport lock is expected to be held before calling
1325 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1327 struct fc_rport_priv
*rdata
;
1329 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1330 fc_lport_state(lport
));
1332 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1334 mutex_lock(&lport
->disc
.disc_mutex
);
1335 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1336 mutex_unlock(&lport
->disc
.disc_mutex
);
1340 rdata
->ops
= &fc_lport_rport_ops
;
1341 lport
->tt
.rport_login(rdata
);
1345 fc_lport_error(lport
, NULL
);
1349 * fc_lport_timeout() - Handler for the retry_work timer
1350 * @work: The work struct of the local port
1352 static void fc_lport_timeout(struct work_struct
*work
)
1354 struct fc_lport
*lport
=
1355 container_of(work
, struct fc_lport
,
1358 mutex_lock(&lport
->lp_mutex
);
1360 switch (lport
->state
) {
1361 case LPORT_ST_DISABLED
:
1364 case LPORT_ST_READY
:
1366 case LPORT_ST_RESET
:
1368 case LPORT_ST_FLOGI
:
1369 fc_lport_enter_flogi(lport
);
1372 fc_lport_enter_dns(lport
);
1374 case LPORT_ST_RNN_ID
:
1375 case LPORT_ST_RSNN_NN
:
1376 case LPORT_ST_RSPN_ID
:
1377 case LPORT_ST_RFT_ID
:
1378 case LPORT_ST_RFF_ID
:
1379 fc_lport_enter_ns(lport
, lport
->state
);
1382 fc_lport_enter_scr(lport
);
1385 fc_lport_enter_logo(lport
);
1389 mutex_unlock(&lport
->lp_mutex
);
1393 * fc_lport_logo_resp() - Handle response to LOGO request
1394 * @sp: The sequence that the LOGO was on
1395 * @fp: The LOGO frame
1396 * @lp_arg: The lport port that received the LOGO request
1398 * Locking Note: This function will be called without the lport lock
1399 * held, but it will lock, call an _enter_* function or fc_lport_error()
1400 * and then unlock the lport.
1402 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1405 struct fc_lport
*lport
= lp_arg
;
1408 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1410 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1413 mutex_lock(&lport
->lp_mutex
);
1415 if (lport
->state
!= LPORT_ST_LOGO
) {
1416 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1417 "%s\n", fc_lport_state(lport
));
1424 fc_lport_error(lport
, fp
);
1428 op
= fc_frame_payload_op(fp
);
1429 if (op
== ELS_LS_ACC
)
1430 fc_lport_enter_disabled(lport
);
1432 fc_lport_error(lport
, fp
);
1437 mutex_unlock(&lport
->lp_mutex
);
1439 EXPORT_SYMBOL(fc_lport_logo_resp
);
1442 * fc_rport_enter_logo() - Logout of the fabric
1443 * @lport: The local port to be logged out
1445 * Locking Note: The lport lock is expected to be held before calling
1448 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1450 struct fc_frame
*fp
;
1451 struct fc_els_logo
*logo
;
1453 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1454 fc_lport_state(lport
));
1456 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1457 fc_vports_linkchange(lport
);
1459 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1461 fc_lport_error(lport
, fp
);
1465 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1466 fc_lport_logo_resp
, lport
,
1467 2 * lport
->r_a_tov
))
1468 fc_lport_error(lport
, NULL
);
1472 * fc_lport_flogi_resp() - Handle response to FLOGI request
1473 * @sp: The sequence that the FLOGI was on
1474 * @fp: The FLOGI response frame
1475 * @lp_arg: The lport port that received the FLOGI response
1477 * Locking Note: This function will be called without the lport lock
1478 * held, but it will lock, call an _enter_* function or fc_lport_error()
1479 * and then unlock the lport.
1481 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1484 struct fc_lport
*lport
= lp_arg
;
1485 struct fc_els_flogi
*flp
;
1488 unsigned int r_a_tov
;
1489 unsigned int e_d_tov
;
1492 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1494 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1497 mutex_lock(&lport
->lp_mutex
);
1499 if (lport
->state
!= LPORT_ST_FLOGI
) {
1500 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1501 "%s\n", fc_lport_state(lport
));
1508 fc_lport_error(lport
, fp
);
1512 did
= fc_frame_did(fp
);
1513 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
) {
1514 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1516 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1518 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1521 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1522 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1523 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1524 if (csp_flags
& FC_SP_FT_EDTR
)
1527 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1529 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1530 if (e_d_tov
> lport
->e_d_tov
)
1531 lport
->e_d_tov
= e_d_tov
;
1532 lport
->r_a_tov
= 2 * e_d_tov
;
1533 fc_lport_set_port_id(lport
, did
, fp
);
1534 printk(KERN_INFO
"host%d: libfc: "
1535 "Port (%6.6x) entered "
1536 "point-to-point mode\n",
1537 lport
->host
->host_no
, did
);
1538 fc_lport_ptp_setup(lport
, fc_frame_sid(fp
),
1544 lport
->e_d_tov
= e_d_tov
;
1545 lport
->r_a_tov
= r_a_tov
;
1546 fc_host_fabric_name(lport
->host
) =
1547 get_unaligned_be64(&flp
->fl_wwnn
);
1548 fc_lport_set_port_id(lport
, did
, fp
);
1549 fc_lport_enter_dns(lport
);
1553 FC_LPORT_DBG(lport
, "FLOGI RJT or bad response\n");
1554 fc_lport_error(lport
, fp
);
1560 mutex_unlock(&lport
->lp_mutex
);
1562 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1565 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1566 * @lport: Fibre Channel local port to be logged in to the fabric
1568 * Locking Note: The lport lock is expected to be held before calling
1571 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1573 struct fc_frame
*fp
;
1575 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1576 fc_lport_state(lport
));
1578 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1580 if (lport
->point_to_multipoint
) {
1582 fc_lport_enter_ready(lport
);
1586 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1588 return fc_lport_error(lport
, fp
);
1590 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1591 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1592 fc_lport_flogi_resp
, lport
,
1593 lport
->vport
? 2 * lport
->r_a_tov
:
1595 fc_lport_error(lport
, NULL
);
1599 * fc_lport_config() - Configure a fc_lport
1600 * @lport: The local port to be configured
1602 int fc_lport_config(struct fc_lport
*lport
)
1604 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1605 mutex_init(&lport
->lp_mutex
);
1607 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1609 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1610 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1611 fc_fc4_conf_lport_params(lport
, FC_TYPE_FCP
);
1615 EXPORT_SYMBOL(fc_lport_config
);
1618 * fc_lport_init() - Initialize the lport layer for a local port
1619 * @lport: The local port to initialize the exchange layer for
1621 int fc_lport_init(struct fc_lport
*lport
)
1623 if (!lport
->tt
.lport_recv
)
1624 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1626 if (!lport
->tt
.lport_reset
)
1627 lport
->tt
.lport_reset
= fc_lport_reset
;
1629 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1630 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1631 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1632 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1633 memset(fc_host_supported_fc4s(lport
->host
), 0,
1634 sizeof(fc_host_supported_fc4s(lport
->host
)));
1635 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1636 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1638 /* This value is also unchanging */
1639 memset(fc_host_active_fc4s(lport
->host
), 0,
1640 sizeof(fc_host_active_fc4s(lport
->host
)));
1641 fc_host_active_fc4s(lport
->host
)[2] = 1;
1642 fc_host_active_fc4s(lport
->host
)[7] = 1;
1643 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1644 fc_host_supported_speeds(lport
->host
) = 0;
1645 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1646 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1647 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1648 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1649 fc_fc4_add_lport(lport
);
1653 EXPORT_SYMBOL(fc_lport_init
);
1656 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1657 * @sp: The sequence for the FC Passthrough response
1658 * @fp: The response frame
1659 * @info_arg: The BSG info that the response is for
1661 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1664 struct fc_bsg_info
*info
= info_arg
;
1665 struct fc_bsg_job
*job
= info
->job
;
1666 struct fc_lport
*lport
= info
->lport
;
1667 struct fc_frame_header
*fh
;
1672 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1673 -ECONNABORTED
: -ETIMEDOUT
;
1674 job
->reply_len
= sizeof(uint32_t);
1675 job
->state_flags
|= FC_RQST_STATE_DONE
;
1681 mutex_lock(&lport
->lp_mutex
);
1682 fh
= fc_frame_header_get(fp
);
1683 len
= fr_len(fp
) - sizeof(*fh
);
1684 buf
= fc_frame_payload_get(fp
, 0);
1686 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1687 /* Get the response code from the first frame payload */
1688 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1689 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1690 (unsigned short)fc_frame_payload_op(fp
);
1692 /* Save the reply status of the job */
1693 job
->reply
->reply_data
.ctels_reply
.status
=
1694 (cmd
== info
->rsp_code
) ?
1695 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1698 job
->reply
->reply_payload_rcv_len
+=
1699 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1700 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1702 if (fr_eof(fp
) == FC_EOF_T
&&
1703 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1704 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1705 if (job
->reply
->reply_payload_rcv_len
>
1706 job
->reply_payload
.payload_len
)
1707 job
->reply
->reply_payload_rcv_len
=
1708 job
->reply_payload
.payload_len
;
1709 job
->reply
->result
= 0;
1710 job
->state_flags
|= FC_RQST_STATE_DONE
;
1715 mutex_unlock(&lport
->lp_mutex
);
1719 * fc_lport_els_request() - Send ELS passthrough request
1720 * @job: The BSG Passthrough job
1721 * @lport: The local port sending the request
1722 * @did: The destination port id
1724 * Locking Note: The lport lock is expected to be held before calling
1727 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1728 struct fc_lport
*lport
,
1731 struct fc_bsg_info
*info
;
1732 struct fc_frame
*fp
;
1733 struct fc_frame_header
*fh
;
1737 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1741 len
= job
->request_payload
.payload_len
;
1742 pp
= fc_frame_payload_get(fp
, len
);
1744 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1745 job
->request_payload
.sg_cnt
,
1748 fh
= fc_frame_header_get(fp
);
1749 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1750 hton24(fh
->fh_d_id
, did
);
1751 hton24(fh
->fh_s_id
, lport
->port_id
);
1752 fh
->fh_type
= FC_TYPE_ELS
;
1753 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1756 fh
->fh_parm_offset
= 0;
1758 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1765 info
->lport
= lport
;
1766 info
->rsp_code
= ELS_LS_ACC
;
1767 info
->nents
= job
->reply_payload
.sg_cnt
;
1768 info
->sg
= job
->reply_payload
.sg_list
;
1770 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1779 * fc_lport_ct_request() - Send CT Passthrough request
1780 * @job: The BSG Passthrough job
1781 * @lport: The local port sending the request
1782 * @did: The destination FC-ID
1783 * @tov: The timeout period to wait for the response
1785 * Locking Note: The lport lock is expected to be held before calling
1788 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1789 struct fc_lport
*lport
, u32 did
, u32 tov
)
1791 struct fc_bsg_info
*info
;
1792 struct fc_frame
*fp
;
1793 struct fc_frame_header
*fh
;
1794 struct fc_ct_req
*ct
;
1797 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1798 job
->request_payload
.payload_len
);
1802 len
= job
->request_payload
.payload_len
;
1803 ct
= fc_frame_payload_get(fp
, len
);
1805 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1806 job
->request_payload
.sg_cnt
,
1809 fh
= fc_frame_header_get(fp
);
1810 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1811 hton24(fh
->fh_d_id
, did
);
1812 hton24(fh
->fh_s_id
, lport
->port_id
);
1813 fh
->fh_type
= FC_TYPE_CT
;
1814 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1817 fh
->fh_parm_offset
= 0;
1819 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1826 info
->lport
= lport
;
1827 info
->rsp_code
= FC_FS_ACC
;
1828 info
->nents
= job
->reply_payload
.sg_cnt
;
1829 info
->sg
= job
->reply_payload
.sg_list
;
1831 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1840 * fc_lport_bsg_request() - The common entry point for sending
1841 * FC Passthrough requests
1842 * @job: The BSG passthrough job
1844 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1846 struct request
*rsp
= job
->req
->next_rq
;
1847 struct Scsi_Host
*shost
= job
->shost
;
1848 struct fc_lport
*lport
= shost_priv(shost
);
1849 struct fc_rport
*rport
;
1850 struct fc_rport_priv
*rdata
;
1854 job
->reply
->reply_payload_rcv_len
= 0;
1856 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1858 mutex_lock(&lport
->lp_mutex
);
1860 switch (job
->request
->msgcode
) {
1861 case FC_BSG_RPT_ELS
:
1866 rdata
= rport
->dd_data
;
1867 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1876 rdata
= rport
->dd_data
;
1877 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1882 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1883 if (did
== FC_FID_DIR_SERV
)
1884 rdata
= lport
->dns_rdata
;
1886 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1891 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1894 case FC_BSG_HST_ELS_NOLOGIN
:
1895 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1896 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1900 mutex_unlock(&lport
->lp_mutex
);
1903 EXPORT_SYMBOL(fc_lport_bsg_request
);