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/module.h>
92 #include <linux/slab.h>
93 #include <asm/unaligned.h>
95 #include <scsi/fc/fc_gs.h>
97 #include <scsi/libfc.h>
98 #include <scsi/fc_encode.h>
99 #include <linux/scatterlist.h>
101 #include "fc_libfc.h"
103 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
104 #define FC_LOCAL_PTP_FID_LO 0x010101
105 #define FC_LOCAL_PTP_FID_HI 0x010102
107 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
109 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
111 static void fc_lport_enter_reset(struct fc_lport
*);
112 static void fc_lport_enter_flogi(struct fc_lport
*);
113 static void fc_lport_enter_dns(struct fc_lport
*);
114 static void fc_lport_enter_ns(struct fc_lport
*, enum fc_lport_state
);
115 static void fc_lport_enter_scr(struct fc_lport
*);
116 static void fc_lport_enter_ready(struct fc_lport
*);
117 static void fc_lport_enter_logo(struct fc_lport
*);
119 static const char *fc_lport_state_names
[] = {
120 [LPORT_ST_DISABLED
] = "disabled",
121 [LPORT_ST_FLOGI
] = "FLOGI",
122 [LPORT_ST_DNS
] = "dNS",
123 [LPORT_ST_RNN_ID
] = "RNN_ID",
124 [LPORT_ST_RSNN_NN
] = "RSNN_NN",
125 [LPORT_ST_RSPN_ID
] = "RSPN_ID",
126 [LPORT_ST_RFT_ID
] = "RFT_ID",
127 [LPORT_ST_RFF_ID
] = "RFF_ID",
128 [LPORT_ST_SCR
] = "SCR",
129 [LPORT_ST_READY
] = "Ready",
130 [LPORT_ST_LOGO
] = "LOGO",
131 [LPORT_ST_RESET
] = "reset",
135 * struct fc_bsg_info - FC Passthrough managemet structure
136 * @job: The passthrough job
137 * @lport: The local port to pass through a command
138 * @rsp_code: The expected response code
139 * @sg: job->reply_payload.sg_list
140 * @nents: job->reply_payload.sg_cnt
141 * @offset: The offset into the response data
144 struct fc_bsg_job
*job
;
145 struct fc_lport
*lport
;
147 struct scatterlist
*sg
;
153 * fc_frame_drop() - Dummy frame handler
154 * @lport: The local port the frame was received on
155 * @fp: The received frame
157 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
164 * fc_lport_rport_callback() - Event handler for rport events
165 * @lport: The lport which is receiving the event
166 * @rdata: private remote port data
167 * @event: The event that occurred
169 * Locking Note: The rport lock should not be held when calling
172 static void fc_lport_rport_callback(struct fc_lport
*lport
,
173 struct fc_rport_priv
*rdata
,
174 enum fc_rport_event event
)
176 FC_LPORT_DBG(lport
, "Received a %d event for port (%6.6x)\n", event
,
179 mutex_lock(&lport
->lp_mutex
);
182 if (lport
->state
== LPORT_ST_DNS
) {
183 lport
->dns_rdata
= rdata
;
184 fc_lport_enter_ns(lport
, LPORT_ST_RNN_ID
);
186 FC_LPORT_DBG(lport
, "Received an READY event "
187 "on port (%6.6x) for the directory "
188 "server, but the lport is not "
189 "in the DNS state, it's in the "
190 "%d state", rdata
->ids
.port_id
,
192 lport
->tt
.rport_logoff(rdata
);
196 case RPORT_EV_FAILED
:
198 lport
->dns_rdata
= NULL
;
203 mutex_unlock(&lport
->lp_mutex
);
207 * fc_lport_state() - Return a string which represents the lport's state
208 * @lport: The lport whose state is to converted to a string
210 static const char *fc_lport_state(struct fc_lport
*lport
)
214 cp
= fc_lport_state_names
[lport
->state
];
221 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
222 * @lport: The lport to attach the ptp rport to
223 * @remote_fid: The FID of the ptp rport
224 * @remote_wwpn: The WWPN of the ptp rport
225 * @remote_wwnn: The WWNN of the ptp rport
227 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
228 u32 remote_fid
, u64 remote_wwpn
,
231 mutex_lock(&lport
->disc
.disc_mutex
);
232 if (lport
->ptp_rdata
) {
233 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
234 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
236 lport
->ptp_rdata
= lport
->tt
.rport_create(lport
, remote_fid
);
237 kref_get(&lport
->ptp_rdata
->kref
);
238 lport
->ptp_rdata
->ids
.port_name
= remote_wwpn
;
239 lport
->ptp_rdata
->ids
.node_name
= remote_wwnn
;
240 mutex_unlock(&lport
->disc
.disc_mutex
);
242 lport
->tt
.rport_login(lport
->ptp_rdata
);
244 fc_lport_enter_ready(lport
);
248 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
249 * @shost: The SCSI host whose port state is to be determined
251 void fc_get_host_port_state(struct Scsi_Host
*shost
)
253 struct fc_lport
*lport
= shost_priv(shost
);
255 mutex_lock(&lport
->lp_mutex
);
257 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
259 switch (lport
->state
) {
261 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
264 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
266 mutex_unlock(&lport
->lp_mutex
);
268 EXPORT_SYMBOL(fc_get_host_port_state
);
271 * fc_get_host_speed() - Return the speed of the given Scsi_Host
272 * @shost: The SCSI host whose port speed is to be determined
274 void fc_get_host_speed(struct Scsi_Host
*shost
)
276 struct fc_lport
*lport
= shost_priv(shost
);
278 fc_host_speed(shost
) = lport
->link_speed
;
280 EXPORT_SYMBOL(fc_get_host_speed
);
283 * fc_get_host_stats() - Return the Scsi_Host's statistics
284 * @shost: The SCSI host whose statistics are to be returned
286 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
288 struct fc_host_statistics
*fcoe_stats
;
289 struct fc_lport
*lport
= shost_priv(shost
);
290 struct timespec v0
, v1
;
292 u64 fcp_in_bytes
= 0;
293 u64 fcp_out_bytes
= 0;
295 fcoe_stats
= &lport
->host_stats
;
296 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
298 jiffies_to_timespec(jiffies
, &v0
);
299 jiffies_to_timespec(lport
->boot_time
, &v1
);
300 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
302 for_each_possible_cpu(cpu
) {
303 struct fcoe_dev_stats
*stats
;
305 stats
= per_cpu_ptr(lport
->dev_stats
, cpu
);
307 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
308 fcoe_stats
->tx_words
+= stats
->TxWords
;
309 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
310 fcoe_stats
->rx_words
+= stats
->RxWords
;
311 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
312 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
313 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
314 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
315 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
316 fcp_in_bytes
+= stats
->InputBytes
;
317 fcp_out_bytes
+= stats
->OutputBytes
;
318 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
320 fcoe_stats
->fcp_input_megabytes
= div_u64(fcp_in_bytes
, 1000000);
321 fcoe_stats
->fcp_output_megabytes
= div_u64(fcp_out_bytes
, 1000000);
322 fcoe_stats
->lip_count
= -1;
323 fcoe_stats
->nos_count
= -1;
324 fcoe_stats
->loss_of_sync_count
= -1;
325 fcoe_stats
->loss_of_signal_count
= -1;
326 fcoe_stats
->prim_seq_protocol_err_count
= -1;
327 fcoe_stats
->dumped_frames
= -1;
330 EXPORT_SYMBOL(fc_get_host_stats
);
333 * fc_lport_flogi_fill() - Fill in FLOGI command for request
334 * @lport: The local port the FLOGI is for
335 * @flogi: The FLOGI command
338 static void fc_lport_flogi_fill(struct fc_lport
*lport
,
339 struct fc_els_flogi
*flogi
,
342 struct fc_els_csp
*sp
;
343 struct fc_els_cssp
*cp
;
345 memset(flogi
, 0, sizeof(*flogi
));
346 flogi
->fl_cmd
= (u8
) op
;
347 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
348 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
350 sp
->sp_hi_ver
= 0x20;
351 sp
->sp_lo_ver
= 0x20;
352 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
353 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
354 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
355 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
356 if (op
!= ELS_FLOGI
) {
357 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
358 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
359 sp
->sp_rel_off
= htons(0x1f);
360 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
362 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
363 cp
->cp_con_seq
= htons(255);
369 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
370 * @lport: The local port to add a new FC-4 type to
371 * @type: The new FC-4 type
373 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
377 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
378 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
382 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
383 * @lport: Fibre Channel local port receiving the RLIR
384 * @fp: The RLIR request frame
386 * Locking Note: The lport lock is expected to be held before calling
389 static void fc_lport_recv_rlir_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
391 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
392 fc_lport_state(lport
));
394 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
399 * fc_lport_recv_echo_req() - Handle received ECHO request
400 * @lport: The local port receiving the ECHO
401 * @fp: ECHO request frame
403 * Locking Note: The lport lock is expected to be held before calling
406 static void fc_lport_recv_echo_req(struct fc_lport
*lport
,
407 struct fc_frame
*in_fp
)
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 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
429 lport
->tt
.frame_send(lport
, fp
);
431 fc_frame_free(in_fp
);
435 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
436 * @lport: The local port receiving the RNID
437 * @fp: The RNID request frame
439 * Locking Note: The lport lock is expected to be held before calling
442 static void fc_lport_recv_rnid_req(struct fc_lport
*lport
,
443 struct fc_frame
*in_fp
)
446 struct fc_els_rnid
*req
;
448 struct fc_els_rnid_resp rnid
;
449 struct fc_els_rnid_cid cid
;
450 struct fc_els_rnid_gen gen
;
452 struct fc_seq_els_data rjt_data
;
456 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
457 fc_lport_state(lport
));
459 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
461 rjt_data
.reason
= ELS_RJT_LOGIC
;
462 rjt_data
.explan
= ELS_EXPL_NONE
;
463 lport
->tt
.seq_els_rsp_send(in_fp
, ELS_LS_RJT
, &rjt_data
);
467 if (fmt
!= ELS_RNIDF_GEN
||
468 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
469 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
470 len
-= sizeof(rp
->gen
);
472 fp
= fc_frame_alloc(lport
, len
);
474 rp
= fc_frame_payload_get(fp
, len
);
476 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
477 rp
->rnid
.rnid_fmt
= fmt
;
478 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
479 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
480 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
481 if (fmt
== ELS_RNIDF_GEN
) {
482 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
483 memcpy(&rp
->gen
, &lport
->rnid_gen
,
486 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
487 lport
->tt
.frame_send(lport
, fp
);
490 fc_frame_free(in_fp
);
494 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
495 * @lport: The local port receiving the LOGO
496 * @fp: The LOGO request frame
498 * Locking Note: The lport lock is exected to be held before calling
501 static void fc_lport_recv_logo_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
503 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
504 fc_lport_enter_reset(lport
);
509 * fc_fabric_login() - Start the lport state machine
510 * @lport: The local port that should log into the fabric
512 * Locking Note: This function should not be called
513 * with the lport lock held.
515 int fc_fabric_login(struct fc_lport
*lport
)
519 mutex_lock(&lport
->lp_mutex
);
520 if (lport
->state
== LPORT_ST_DISABLED
||
521 lport
->state
== LPORT_ST_LOGO
) {
522 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
523 fc_lport_enter_reset(lport
);
526 mutex_unlock(&lport
->lp_mutex
);
530 EXPORT_SYMBOL(fc_fabric_login
);
533 * __fc_linkup() - Handler for transport linkup events
534 * @lport: The lport whose link is up
536 * Locking: must be called with the lp_mutex held
538 void __fc_linkup(struct fc_lport
*lport
)
540 if (!lport
->link_up
) {
543 if (lport
->state
== LPORT_ST_RESET
)
544 fc_lport_enter_flogi(lport
);
549 * fc_linkup() - Handler for transport linkup events
550 * @lport: The local port whose link is up
552 void fc_linkup(struct fc_lport
*lport
)
554 printk(KERN_INFO
"host%d: libfc: Link up on port (%6.6x)\n",
555 lport
->host
->host_no
, lport
->port_id
);
557 mutex_lock(&lport
->lp_mutex
);
559 mutex_unlock(&lport
->lp_mutex
);
561 EXPORT_SYMBOL(fc_linkup
);
564 * __fc_linkdown() - Handler for transport linkdown events
565 * @lport: The lport whose link is down
567 * Locking: must be called with the lp_mutex held
569 void __fc_linkdown(struct fc_lport
*lport
)
571 if (lport
->link_up
) {
573 fc_lport_enter_reset(lport
);
574 lport
->tt
.fcp_cleanup(lport
);
579 * fc_linkdown() - Handler for transport linkdown events
580 * @lport: The local port whose link is down
582 void fc_linkdown(struct fc_lport
*lport
)
584 printk(KERN_INFO
"host%d: libfc: Link down on port (%6.6x)\n",
585 lport
->host
->host_no
, lport
->port_id
);
587 mutex_lock(&lport
->lp_mutex
);
588 __fc_linkdown(lport
);
589 mutex_unlock(&lport
->lp_mutex
);
591 EXPORT_SYMBOL(fc_linkdown
);
594 * fc_fabric_logoff() - Logout of the fabric
595 * @lport: The local port to logoff the fabric
598 * 0 for success, -1 for failure
600 int fc_fabric_logoff(struct fc_lport
*lport
)
602 lport
->tt
.disc_stop_final(lport
);
603 mutex_lock(&lport
->lp_mutex
);
604 if (lport
->dns_rdata
)
605 lport
->tt
.rport_logoff(lport
->dns_rdata
);
606 mutex_unlock(&lport
->lp_mutex
);
607 lport
->tt
.rport_flush_queue();
608 mutex_lock(&lport
->lp_mutex
);
609 fc_lport_enter_logo(lport
);
610 mutex_unlock(&lport
->lp_mutex
);
611 cancel_delayed_work_sync(&lport
->retry_work
);
614 EXPORT_SYMBOL(fc_fabric_logoff
);
617 * fc_lport_destroy() - Unregister a fc_lport
618 * @lport: The local port to unregister
621 * exit routine for fc_lport instance
622 * clean-up all the allocated memory
623 * and free up other system resources.
626 int fc_lport_destroy(struct fc_lport
*lport
)
628 mutex_lock(&lport
->lp_mutex
);
629 lport
->state
= LPORT_ST_DISABLED
;
631 lport
->tt
.frame_send
= fc_frame_drop
;
632 mutex_unlock(&lport
->lp_mutex
);
634 lport
->tt
.fcp_abort_io(lport
);
635 lport
->tt
.disc_stop_final(lport
);
636 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
637 fc_fc4_del_lport(lport
);
640 EXPORT_SYMBOL(fc_lport_destroy
);
643 * fc_set_mfs() - Set the maximum frame size for a local port
644 * @lport: The local port to set the MFS for
647 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
649 unsigned int old_mfs
;
652 mutex_lock(&lport
->lp_mutex
);
654 old_mfs
= lport
->mfs
;
656 if (mfs
>= FC_MIN_MAX_FRAME
) {
658 if (mfs
> FC_MAX_FRAME
)
660 mfs
-= sizeof(struct fc_frame_header
);
665 if (!rc
&& mfs
< old_mfs
)
666 fc_lport_enter_reset(lport
);
668 mutex_unlock(&lport
->lp_mutex
);
672 EXPORT_SYMBOL(fc_set_mfs
);
675 * fc_lport_disc_callback() - Callback for discovery events
676 * @lport: The local port receiving the event
677 * @event: The discovery event
679 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
682 case DISC_EV_SUCCESS
:
683 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
686 printk(KERN_ERR
"host%d: libfc: "
687 "Discovery failed for port (%6.6x)\n",
688 lport
->host
->host_no
, lport
->port_id
);
689 mutex_lock(&lport
->lp_mutex
);
690 fc_lport_enter_reset(lport
);
691 mutex_unlock(&lport
->lp_mutex
);
700 * fc_rport_enter_ready() - Enter the ready state and start discovery
701 * @lport: The local port that is ready
703 * Locking Note: The lport lock is expected to be held before calling
706 static void fc_lport_enter_ready(struct fc_lport
*lport
)
708 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
709 fc_lport_state(lport
));
711 fc_lport_state_enter(lport
, LPORT_ST_READY
);
713 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
714 fc_vports_linkchange(lport
);
716 if (!lport
->ptp_rdata
)
717 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
721 * fc_lport_set_port_id() - set the local port Port ID
722 * @lport: The local port which will have its Port ID set.
723 * @port_id: The new port ID.
724 * @fp: The frame containing the incoming request, or NULL.
726 * Locking Note: The lport lock is expected to be held before calling
729 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
733 printk(KERN_INFO
"host%d: Assigned Port ID %6.6x\n",
734 lport
->host
->host_no
, port_id
);
736 lport
->port_id
= port_id
;
738 /* Update the fc_host */
739 fc_host_port_id(lport
->host
) = port_id
;
741 if (lport
->tt
.lport_set_port_id
)
742 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
746 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
747 * @lport: The local port which will have its Port ID set.
748 * @port_id: The new port ID.
750 * Called by the lower-level driver when transport sets the local port_id.
751 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
752 * discovery to be skipped.
754 void fc_lport_set_local_id(struct fc_lport
*lport
, u32 port_id
)
756 mutex_lock(&lport
->lp_mutex
);
758 fc_lport_set_port_id(lport
, port_id
, NULL
);
760 switch (lport
->state
) {
764 fc_lport_enter_ready(lport
);
769 mutex_unlock(&lport
->lp_mutex
);
771 EXPORT_SYMBOL(fc_lport_set_local_id
);
774 * fc_lport_recv_flogi_req() - Receive a FLOGI request
775 * @lport: The local port that received the request
776 * @rx_fp: The FLOGI frame
778 * A received FLOGI request indicates a point-to-point connection.
779 * Accept it with the common service parameters indicating our N port.
780 * Set up to do a PLOGI if we have the higher-number WWPN.
782 * Locking Note: The lport lock is expected to be held before calling
785 static void fc_lport_recv_flogi_req(struct fc_lport
*lport
,
786 struct fc_frame
*rx_fp
)
789 struct fc_frame_header
*fh
;
790 struct fc_els_flogi
*flp
;
791 struct fc_els_flogi
*new_flp
;
796 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
797 fc_lport_state(lport
));
799 remote_fid
= fc_frame_sid(rx_fp
);
800 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
803 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
804 if (remote_wwpn
== lport
->wwpn
) {
805 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
806 "with same WWPN %16.16llx\n",
807 lport
->host
->host_no
, remote_wwpn
);
810 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
813 * XXX what is the right thing to do for FIDs?
814 * The originator might expect our S_ID to be 0xfffffe.
815 * But if so, both of us could end up with the same FID.
817 local_fid
= FC_LOCAL_PTP_FID_LO
;
818 if (remote_wwpn
< lport
->wwpn
) {
819 local_fid
= FC_LOCAL_PTP_FID_HI
;
820 if (!remote_fid
|| remote_fid
== local_fid
)
821 remote_fid
= FC_LOCAL_PTP_FID_LO
;
822 } else if (!remote_fid
) {
823 remote_fid
= FC_LOCAL_PTP_FID_HI
;
826 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
828 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
830 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
831 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
832 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
835 * Send the response. If this fails, the originator should
836 * repeat the sequence.
838 fc_fill_reply_hdr(fp
, rx_fp
, FC_RCTL_ELS_REP
, 0);
839 fh
= fc_frame_header_get(fp
);
840 hton24(fh
->fh_s_id
, local_fid
);
841 hton24(fh
->fh_d_id
, remote_fid
);
842 lport
->tt
.frame_send(lport
, fp
);
845 fc_lport_error(lport
, fp
);
847 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
848 get_unaligned_be64(&flp
->fl_wwnn
));
850 fc_frame_free(rx_fp
);
854 * fc_lport_recv_els_req() - The generic lport ELS request handler
855 * @lport: The local port that received the request
856 * @fp: The request frame
858 * This function will see if the lport handles the request or
859 * if an rport should handle the request.
861 * Locking Note: This function should not be called with the lport
862 * lock held because it will grab the lock.
864 static void fc_lport_recv_els_req(struct fc_lport
*lport
,
867 void (*recv
)(struct fc_lport
*, struct fc_frame
*);
869 mutex_lock(&lport
->lp_mutex
);
872 * Handle special ELS cases like FLOGI, LOGO, and
873 * RSCN here. These don't require a session.
874 * Even if we had a session, it might not be ready.
882 recv
= lport
->tt
.rport_recv_req
;
883 switch (fc_frame_payload_op(fp
)) {
885 if (!lport
->point_to_multipoint
)
886 recv
= fc_lport_recv_flogi_req
;
889 if (fc_frame_sid(fp
) == FC_FID_FLOGI
)
890 recv
= fc_lport_recv_logo_req
;
893 recv
= lport
->tt
.disc_recv_req
;
896 recv
= fc_lport_recv_echo_req
;
899 recv
= fc_lport_recv_rlir_req
;
902 recv
= fc_lport_recv_rnid_req
;
908 mutex_unlock(&lport
->lp_mutex
);
911 static int fc_lport_els_prli(struct fc_rport_priv
*rdata
, u32 spp_len
,
912 const struct fc_els_spp
*spp_in
,
913 struct fc_els_spp
*spp_out
)
915 return FC_SPP_RESP_INVL
;
918 struct fc4_prov fc_lport_els_prov
= {
919 .prli
= fc_lport_els_prli
,
920 .recv
= fc_lport_recv_els_req
,
924 * fc_lport_recv_req() - The generic lport request handler
925 * @lport: The lport that received the request
926 * @fp: The frame the request is in
928 * Locking Note: This function should not be called with the lport
929 * lock held because it may grab the lock.
931 static void fc_lport_recv_req(struct fc_lport
*lport
,
934 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
935 struct fc_seq
*sp
= fr_seq(fp
);
936 struct fc4_prov
*prov
;
939 * Use RCU read lock and module_lock to be sure module doesn't
940 * deregister and get unloaded while we're calling it.
941 * try_module_get() is inlined and accepts a NULL parameter.
942 * Only ELSes and FCP target ops should come through here.
943 * The locking is unfortunate, and a better scheme is being sought.
947 if (fh
->fh_type
>= FC_FC4_PROV_SIZE
)
949 prov
= rcu_dereference(fc_passive_prov
[fh
->fh_type
]);
950 if (!prov
|| !try_module_get(prov
->module
))
953 prov
->recv(lport
, fp
);
954 module_put(prov
->module
);
958 FC_LPORT_DBG(lport
, "dropping unexpected frame type %x\n", fh
->fh_type
);
960 lport
->tt
.exch_done(sp
);
964 * fc_lport_reset() - Reset a local port
965 * @lport: The local port which should be reset
967 * Locking Note: This functions should not be called with the
970 int fc_lport_reset(struct fc_lport
*lport
)
972 cancel_delayed_work_sync(&lport
->retry_work
);
973 mutex_lock(&lport
->lp_mutex
);
974 fc_lport_enter_reset(lport
);
975 mutex_unlock(&lport
->lp_mutex
);
978 EXPORT_SYMBOL(fc_lport_reset
);
981 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
982 * @lport: The local port to be reset
984 * Locking Note: The lport lock is expected to be held before calling
987 static void fc_lport_reset_locked(struct fc_lport
*lport
)
989 if (lport
->dns_rdata
)
990 lport
->tt
.rport_logoff(lport
->dns_rdata
);
992 if (lport
->ptp_rdata
) {
993 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
994 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
995 lport
->ptp_rdata
= NULL
;
998 lport
->tt
.disc_stop(lport
);
1000 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
1001 fc_host_fabric_name(lport
->host
) = 0;
1003 if (lport
->port_id
&& (!lport
->point_to_multipoint
|| !lport
->link_up
))
1004 fc_lport_set_port_id(lport
, 0, NULL
);
1008 * fc_lport_enter_reset() - Reset the local port
1009 * @lport: The local port to be reset
1011 * Locking Note: The lport lock is expected to be held before calling
1014 static void fc_lport_enter_reset(struct fc_lport
*lport
)
1016 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
1017 fc_lport_state(lport
));
1019 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
1024 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
1026 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
1028 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
1029 fc_host_post_event(lport
->host
, fc_get_event_number(),
1030 FCH_EVT_LIPRESET
, 0);
1031 fc_vports_linkchange(lport
);
1032 fc_lport_reset_locked(lport
);
1034 fc_lport_enter_flogi(lport
);
1038 * fc_lport_enter_disabled() - Disable the local port
1039 * @lport: The local port to be reset
1041 * Locking Note: The lport lock is expected to be held before calling
1044 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
1046 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
1047 fc_lport_state(lport
));
1049 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1050 fc_vports_linkchange(lport
);
1051 fc_lport_reset_locked(lport
);
1055 * fc_lport_error() - Handler for any errors
1056 * @lport: The local port that the error was on
1057 * @fp: The error code encoded in a frame pointer
1059 * If the error was caused by a resource allocation failure
1060 * then wait for half a second and retry, otherwise retry
1061 * after the e_d_tov time.
1063 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1065 unsigned long delay
= 0;
1066 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1067 PTR_ERR(fp
), fc_lport_state(lport
),
1068 lport
->retry_count
);
1070 if (PTR_ERR(fp
) == -FC_EX_CLOSED
)
1074 * Memory allocation failure, or the exchange timed out
1075 * or we received LS_RJT.
1078 if (lport
->retry_count
< lport
->max_retry_count
) {
1079 lport
->retry_count
++;
1081 delay
= msecs_to_jiffies(500);
1083 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1085 schedule_delayed_work(&lport
->retry_work
, delay
);
1087 fc_lport_enter_reset(lport
);
1091 * fc_lport_ns_resp() - Handle response to a name server
1092 * registration exchange
1093 * @sp: current sequence in exchange
1094 * @fp: response frame
1095 * @lp_arg: Fibre Channel host port instance
1097 * Locking Note: This function will be called without the lport lock
1098 * held, but it will lock, call an _enter_* function or fc_lport_error()
1099 * and then unlock the lport.
1101 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1104 struct fc_lport
*lport
= lp_arg
;
1105 struct fc_frame_header
*fh
;
1106 struct fc_ct_hdr
*ct
;
1108 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1110 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1113 mutex_lock(&lport
->lp_mutex
);
1115 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1116 FC_LPORT_DBG(lport
, "Received a name server response, "
1117 "but in state %s\n", fc_lport_state(lport
));
1124 fc_lport_error(lport
, fp
);
1128 fh
= fc_frame_header_get(fp
);
1129 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1131 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1132 ct
->ct_fs_type
== FC_FST_DIR
&&
1133 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1134 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1135 switch (lport
->state
) {
1136 case LPORT_ST_RNN_ID
:
1137 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1139 case LPORT_ST_RSNN_NN
:
1140 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1142 case LPORT_ST_RSPN_ID
:
1143 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1145 case LPORT_ST_RFT_ID
:
1146 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1148 case LPORT_ST_RFF_ID
:
1149 fc_lport_enter_scr(lport
);
1152 /* should have already been caught by state checks */
1156 fc_lport_error(lport
, fp
);
1160 mutex_unlock(&lport
->lp_mutex
);
1164 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1165 * @sp: current sequence in SCR exchange
1166 * @fp: response frame
1167 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1169 * Locking Note: This function will be called without the lport lock
1170 * held, but it will lock, call an _enter_* function or fc_lport_error
1171 * and then unlock the lport.
1173 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1176 struct fc_lport
*lport
= lp_arg
;
1179 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1181 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1184 mutex_lock(&lport
->lp_mutex
);
1186 if (lport
->state
!= LPORT_ST_SCR
) {
1187 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1188 "%s\n", fc_lport_state(lport
));
1195 fc_lport_error(lport
, fp
);
1199 op
= fc_frame_payload_op(fp
);
1200 if (op
== ELS_LS_ACC
)
1201 fc_lport_enter_ready(lport
);
1203 fc_lport_error(lport
, fp
);
1208 mutex_unlock(&lport
->lp_mutex
);
1212 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1213 * @lport: The local port to register for state changes
1215 * Locking Note: The lport lock is expected to be held before calling
1218 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1220 struct fc_frame
*fp
;
1222 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1223 fc_lport_state(lport
));
1225 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1227 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1229 fc_lport_error(lport
, fp
);
1233 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1234 fc_lport_scr_resp
, lport
,
1235 2 * lport
->r_a_tov
))
1236 fc_lport_error(lport
, NULL
);
1240 * fc_lport_enter_ns() - register some object with the name server
1241 * @lport: Fibre Channel local port to register
1243 * Locking Note: The lport lock is expected to be held before calling
1246 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1248 struct fc_frame
*fp
;
1250 int size
= sizeof(struct fc_ct_hdr
);
1253 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1254 fc_lport_state_names
[state
],
1255 fc_lport_state(lport
));
1257 fc_lport_state_enter(lport
, state
);
1260 case LPORT_ST_RNN_ID
:
1262 size
+= sizeof(struct fc_ns_rn_id
);
1264 case LPORT_ST_RSNN_NN
:
1265 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1266 /* if there is no symbolic name, skip to RFT_ID */
1268 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1269 cmd
= FC_NS_RSNN_NN
;
1270 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1272 case LPORT_ST_RSPN_ID
:
1273 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1274 /* if there is no symbolic name, skip to RFT_ID */
1276 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1277 cmd
= FC_NS_RSPN_ID
;
1278 size
+= sizeof(struct fc_ns_rspn
) + len
;
1280 case LPORT_ST_RFT_ID
:
1282 size
+= sizeof(struct fc_ns_rft
);
1284 case LPORT_ST_RFF_ID
:
1286 size
+= sizeof(struct fc_ns_rff_id
);
1289 fc_lport_error(lport
, NULL
);
1293 fp
= fc_frame_alloc(lport
, size
);
1295 fc_lport_error(lport
, fp
);
1299 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1301 lport
, 3 * lport
->r_a_tov
))
1302 fc_lport_error(lport
, fp
);
1305 static struct fc_rport_operations fc_lport_rport_ops
= {
1306 .event_callback
= fc_lport_rport_callback
,
1310 * fc_rport_enter_dns() - Create a fc_rport for the name server
1311 * @lport: The local port requesting a remote port for the name server
1313 * Locking Note: The lport lock is expected to be held before calling
1316 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1318 struct fc_rport_priv
*rdata
;
1320 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1321 fc_lport_state(lport
));
1323 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1325 mutex_lock(&lport
->disc
.disc_mutex
);
1326 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1327 mutex_unlock(&lport
->disc
.disc_mutex
);
1331 rdata
->ops
= &fc_lport_rport_ops
;
1332 lport
->tt
.rport_login(rdata
);
1336 fc_lport_error(lport
, NULL
);
1340 * fc_lport_timeout() - Handler for the retry_work timer
1341 * @work: The work struct of the local port
1343 static void fc_lport_timeout(struct work_struct
*work
)
1345 struct fc_lport
*lport
=
1346 container_of(work
, struct fc_lport
,
1349 mutex_lock(&lport
->lp_mutex
);
1351 switch (lport
->state
) {
1352 case LPORT_ST_DISABLED
:
1355 case LPORT_ST_READY
:
1357 case LPORT_ST_RESET
:
1359 case LPORT_ST_FLOGI
:
1360 fc_lport_enter_flogi(lport
);
1363 fc_lport_enter_dns(lport
);
1365 case LPORT_ST_RNN_ID
:
1366 case LPORT_ST_RSNN_NN
:
1367 case LPORT_ST_RSPN_ID
:
1368 case LPORT_ST_RFT_ID
:
1369 case LPORT_ST_RFF_ID
:
1370 fc_lport_enter_ns(lport
, lport
->state
);
1373 fc_lport_enter_scr(lport
);
1376 fc_lport_enter_logo(lport
);
1380 mutex_unlock(&lport
->lp_mutex
);
1384 * fc_lport_logo_resp() - Handle response to LOGO request
1385 * @sp: The sequence that the LOGO was on
1386 * @fp: The LOGO frame
1387 * @lp_arg: The lport port that received the LOGO request
1389 * Locking Note: This function will be called without the lport lock
1390 * held, but it will lock, call an _enter_* function or fc_lport_error()
1391 * and then unlock the lport.
1393 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1396 struct fc_lport
*lport
= lp_arg
;
1399 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1401 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1404 mutex_lock(&lport
->lp_mutex
);
1406 if (lport
->state
!= LPORT_ST_LOGO
) {
1407 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1408 "%s\n", fc_lport_state(lport
));
1415 fc_lport_error(lport
, fp
);
1419 op
= fc_frame_payload_op(fp
);
1420 if (op
== ELS_LS_ACC
)
1421 fc_lport_enter_disabled(lport
);
1423 fc_lport_error(lport
, fp
);
1428 mutex_unlock(&lport
->lp_mutex
);
1430 EXPORT_SYMBOL(fc_lport_logo_resp
);
1433 * fc_rport_enter_logo() - Logout of the fabric
1434 * @lport: The local port to be logged out
1436 * Locking Note: The lport lock is expected to be held before calling
1439 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1441 struct fc_frame
*fp
;
1442 struct fc_els_logo
*logo
;
1444 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1445 fc_lport_state(lport
));
1447 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1448 fc_vports_linkchange(lport
);
1450 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1452 fc_lport_error(lport
, fp
);
1456 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1457 fc_lport_logo_resp
, lport
,
1458 2 * lport
->r_a_tov
))
1459 fc_lport_error(lport
, NULL
);
1463 * fc_lport_flogi_resp() - Handle response to FLOGI request
1464 * @sp: The sequence that the FLOGI was on
1465 * @fp: The FLOGI response frame
1466 * @lp_arg: The lport port that received the FLOGI response
1468 * Locking Note: This function will be called without the lport lock
1469 * held, but it will lock, call an _enter_* function or fc_lport_error()
1470 * and then unlock the lport.
1472 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1475 struct fc_lport
*lport
= lp_arg
;
1476 struct fc_els_flogi
*flp
;
1479 unsigned int r_a_tov
;
1480 unsigned int e_d_tov
;
1483 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1485 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1488 mutex_lock(&lport
->lp_mutex
);
1490 if (lport
->state
!= LPORT_ST_FLOGI
) {
1491 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1492 "%s\n", fc_lport_state(lport
));
1499 fc_lport_error(lport
, fp
);
1503 did
= fc_frame_did(fp
);
1504 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
) {
1505 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1507 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1509 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1512 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1513 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1514 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1515 if (csp_flags
& FC_SP_FT_EDTR
)
1518 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1520 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1521 if (e_d_tov
> lport
->e_d_tov
)
1522 lport
->e_d_tov
= e_d_tov
;
1523 lport
->r_a_tov
= 2 * e_d_tov
;
1524 fc_lport_set_port_id(lport
, did
, fp
);
1525 printk(KERN_INFO
"host%d: libfc: "
1526 "Port (%6.6x) entered "
1527 "point-to-point mode\n",
1528 lport
->host
->host_no
, did
);
1529 fc_lport_ptp_setup(lport
, fc_frame_sid(fp
),
1535 lport
->e_d_tov
= e_d_tov
;
1536 lport
->r_a_tov
= r_a_tov
;
1537 fc_host_fabric_name(lport
->host
) =
1538 get_unaligned_be64(&flp
->fl_wwnn
);
1539 fc_lport_set_port_id(lport
, did
, fp
);
1540 fc_lport_enter_dns(lport
);
1544 FC_LPORT_DBG(lport
, "FLOGI RJT or bad response\n");
1545 fc_lport_error(lport
, fp
);
1551 mutex_unlock(&lport
->lp_mutex
);
1553 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1556 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1557 * @lport: Fibre Channel local port to be logged in to the fabric
1559 * Locking Note: The lport lock is expected to be held before calling
1562 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1564 struct fc_frame
*fp
;
1566 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1567 fc_lport_state(lport
));
1569 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1571 if (lport
->point_to_multipoint
) {
1573 fc_lport_enter_ready(lport
);
1577 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1579 return fc_lport_error(lport
, fp
);
1581 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1582 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1583 fc_lport_flogi_resp
, lport
,
1584 lport
->vport
? 2 * lport
->r_a_tov
:
1586 fc_lport_error(lport
, NULL
);
1590 * fc_lport_config() - Configure a fc_lport
1591 * @lport: The local port to be configured
1593 int fc_lport_config(struct fc_lport
*lport
)
1595 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1596 mutex_init(&lport
->lp_mutex
);
1598 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1600 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1601 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1602 fc_fc4_conf_lport_params(lport
, FC_TYPE_FCP
);
1606 EXPORT_SYMBOL(fc_lport_config
);
1609 * fc_lport_init() - Initialize the lport layer for a local port
1610 * @lport: The local port to initialize the exchange layer for
1612 int fc_lport_init(struct fc_lport
*lport
)
1614 if (!lport
->tt
.lport_recv
)
1615 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1617 if (!lport
->tt
.lport_reset
)
1618 lport
->tt
.lport_reset
= fc_lport_reset
;
1620 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1621 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1622 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1623 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1624 memset(fc_host_supported_fc4s(lport
->host
), 0,
1625 sizeof(fc_host_supported_fc4s(lport
->host
)));
1626 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1627 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1629 /* This value is also unchanging */
1630 memset(fc_host_active_fc4s(lport
->host
), 0,
1631 sizeof(fc_host_active_fc4s(lport
->host
)));
1632 fc_host_active_fc4s(lport
->host
)[2] = 1;
1633 fc_host_active_fc4s(lport
->host
)[7] = 1;
1634 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1635 fc_host_supported_speeds(lport
->host
) = 0;
1636 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1637 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1638 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1639 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1640 fc_fc4_add_lport(lport
);
1644 EXPORT_SYMBOL(fc_lport_init
);
1647 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1648 * @sp: The sequence for the FC Passthrough response
1649 * @fp: The response frame
1650 * @info_arg: The BSG info that the response is for
1652 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1655 struct fc_bsg_info
*info
= info_arg
;
1656 struct fc_bsg_job
*job
= info
->job
;
1657 struct fc_lport
*lport
= info
->lport
;
1658 struct fc_frame_header
*fh
;
1663 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1664 -ECONNABORTED
: -ETIMEDOUT
;
1665 job
->reply_len
= sizeof(uint32_t);
1666 job
->state_flags
|= FC_RQST_STATE_DONE
;
1672 mutex_lock(&lport
->lp_mutex
);
1673 fh
= fc_frame_header_get(fp
);
1674 len
= fr_len(fp
) - sizeof(*fh
);
1675 buf
= fc_frame_payload_get(fp
, 0);
1677 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1678 /* Get the response code from the first frame payload */
1679 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1680 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1681 (unsigned short)fc_frame_payload_op(fp
);
1683 /* Save the reply status of the job */
1684 job
->reply
->reply_data
.ctels_reply
.status
=
1685 (cmd
== info
->rsp_code
) ?
1686 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1689 job
->reply
->reply_payload_rcv_len
+=
1690 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1691 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1693 if (fr_eof(fp
) == FC_EOF_T
&&
1694 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1695 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1696 if (job
->reply
->reply_payload_rcv_len
>
1697 job
->reply_payload
.payload_len
)
1698 job
->reply
->reply_payload_rcv_len
=
1699 job
->reply_payload
.payload_len
;
1700 job
->reply
->result
= 0;
1701 job
->state_flags
|= FC_RQST_STATE_DONE
;
1706 mutex_unlock(&lport
->lp_mutex
);
1710 * fc_lport_els_request() - Send ELS passthrough request
1711 * @job: The BSG Passthrough job
1712 * @lport: The local port sending the request
1713 * @did: The destination port id
1715 * Locking Note: The lport lock is expected to be held before calling
1718 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1719 struct fc_lport
*lport
,
1722 struct fc_bsg_info
*info
;
1723 struct fc_frame
*fp
;
1724 struct fc_frame_header
*fh
;
1728 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1732 len
= job
->request_payload
.payload_len
;
1733 pp
= fc_frame_payload_get(fp
, len
);
1735 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1736 job
->request_payload
.sg_cnt
,
1739 fh
= fc_frame_header_get(fp
);
1740 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1741 hton24(fh
->fh_d_id
, did
);
1742 hton24(fh
->fh_s_id
, lport
->port_id
);
1743 fh
->fh_type
= FC_TYPE_ELS
;
1744 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1747 fh
->fh_parm_offset
= 0;
1749 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1756 info
->lport
= lport
;
1757 info
->rsp_code
= ELS_LS_ACC
;
1758 info
->nents
= job
->reply_payload
.sg_cnt
;
1759 info
->sg
= job
->reply_payload
.sg_list
;
1761 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1770 * fc_lport_ct_request() - Send CT Passthrough request
1771 * @job: The BSG Passthrough job
1772 * @lport: The local port sending the request
1773 * @did: The destination FC-ID
1774 * @tov: The timeout period to wait for the response
1776 * Locking Note: The lport lock is expected to be held before calling
1779 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1780 struct fc_lport
*lport
, u32 did
, u32 tov
)
1782 struct fc_bsg_info
*info
;
1783 struct fc_frame
*fp
;
1784 struct fc_frame_header
*fh
;
1785 struct fc_ct_req
*ct
;
1788 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1789 job
->request_payload
.payload_len
);
1793 len
= job
->request_payload
.payload_len
;
1794 ct
= fc_frame_payload_get(fp
, len
);
1796 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1797 job
->request_payload
.sg_cnt
,
1800 fh
= fc_frame_header_get(fp
);
1801 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1802 hton24(fh
->fh_d_id
, did
);
1803 hton24(fh
->fh_s_id
, lport
->port_id
);
1804 fh
->fh_type
= FC_TYPE_CT
;
1805 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1808 fh
->fh_parm_offset
= 0;
1810 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1817 info
->lport
= lport
;
1818 info
->rsp_code
= FC_FS_ACC
;
1819 info
->nents
= job
->reply_payload
.sg_cnt
;
1820 info
->sg
= job
->reply_payload
.sg_list
;
1822 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1831 * fc_lport_bsg_request() - The common entry point for sending
1832 * FC Passthrough requests
1833 * @job: The BSG passthrough job
1835 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1837 struct request
*rsp
= job
->req
->next_rq
;
1838 struct Scsi_Host
*shost
= job
->shost
;
1839 struct fc_lport
*lport
= shost_priv(shost
);
1840 struct fc_rport
*rport
;
1841 struct fc_rport_priv
*rdata
;
1845 job
->reply
->reply_payload_rcv_len
= 0;
1847 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1849 mutex_lock(&lport
->lp_mutex
);
1851 switch (job
->request
->msgcode
) {
1852 case FC_BSG_RPT_ELS
:
1857 rdata
= rport
->dd_data
;
1858 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1867 rdata
= rport
->dd_data
;
1868 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1873 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1874 if (did
== FC_FID_DIR_SERV
)
1875 rdata
= lport
->dns_rdata
;
1877 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1882 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1885 case FC_BSG_HST_ELS_NOLOGIN
:
1886 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1887 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1891 mutex_unlock(&lport
->lp_mutex
);
1894 EXPORT_SYMBOL(fc_lport_bsg_request
);