2 * Copyright(c) 2007 Intel Corporation. All rights reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms and conditions of the GNU General Public License,
6 * version 2, as published by the Free Software Foundation.
8 * This program is distributed in the hope it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
17 * Maintained at www.Open-FCoE.org
23 * These comments only apply to the 'port code' which consists of the lport,
24 * disc and rport blocks.
28 * The lport, disc and rport blocks all have mutexes that are used to protect
29 * those objects. The main motivation for these locks is to prevent from
30 * having an lport reset just before we send a frame. In that scenario the
31 * lport's FID would get set to zero and then we'd send a frame with an
32 * invalid SID. We also need to ensure that states don't change unexpectedly
33 * while processing another state.
37 * The following hierarchy defines the locking rules. A greater lock
38 * may be held before acquiring a lesser lock, but a lesser lock should never
39 * be held while attempting to acquire a greater lock. Here is the hierarchy-
41 * lport > disc, lport > rport, disc > rport
45 * The callbacks cause complications with this scheme. There is a callback
46 * from the rport (to either lport or disc) and a callback from disc
49 * As rports exit the rport state machine a callback is made to the owner of
50 * the rport to notify success or failure. Since the callback is likely to
51 * cause the lport or disc to grab its lock we cannot hold the rport lock
52 * while making the callback. To ensure that the rport is not free'd while
53 * processing the callback the rport callbacks are serialized through a
54 * single-threaded workqueue. An rport would never be free'd while in a
55 * callback handler becuase no other rport work in this queue can be executed
58 * When discovery succeeds or fails a callback is made to the lport as
59 * notification. Currently, successful discovery causes the lport to take no
60 * action. A failure will cause the lport to reset. There is likely a circular
61 * locking problem with this implementation.
67 * The critical sections protected by the lport's mutex are quite broad and
68 * may be improved upon in the future. The lport code and its locking doesn't
69 * influence the I/O path, so excessive locking doesn't penalize I/O
72 * The strategy is to lock whenever processing a request or response. Note
73 * that every _enter_* function corresponds to a state change. They generally
74 * change the lports state and then send a request out on the wire. We lock
75 * before calling any of these functions to protect that state change. This
76 * means that the entry points into the lport block manage the locks while
77 * the state machine can transition between states (i.e. _enter_* functions)
78 * while always staying protected.
80 * When handling responses we also hold the lport mutex broadly. When the
81 * lport receives the response frame it locks the mutex and then calls the
82 * appropriate handler for the particuar response. Generally a response will
83 * trigger a state change and so the lock must already be held.
85 * Retries also have to consider the locking. The retries occur from a work
86 * context and the work function will lock the lport and then retry the state
87 * (i.e. _enter_* function).
90 #include <linux/timer.h>
91 #include <linux/slab.h>
92 #include <asm/unaligned.h>
94 #include <scsi/fc/fc_gs.h>
96 #include <scsi/libfc.h>
97 #include <scsi/fc_encode.h>
98 #include <linux/scatterlist.h>
100 #include "fc_libfc.h"
102 /* Fabric IDs to use for point-to-point mode, chosen on whims. */
103 #define FC_LOCAL_PTP_FID_LO 0x010101
104 #define FC_LOCAL_PTP_FID_HI 0x010102
106 #define DNS_DELAY 3 /* Discovery delay after RSCN (in seconds)*/
108 static void fc_lport_error(struct fc_lport
*, struct fc_frame
*);
110 static void fc_lport_enter_reset(struct fc_lport
*);
111 static void fc_lport_enter_flogi(struct fc_lport
*);
112 static void fc_lport_enter_dns(struct fc_lport
*);
113 static void fc_lport_enter_ns(struct fc_lport
*, enum fc_lport_state
);
114 static void fc_lport_enter_scr(struct fc_lport
*);
115 static void fc_lport_enter_ready(struct fc_lport
*);
116 static void fc_lport_enter_logo(struct fc_lport
*);
118 static const char *fc_lport_state_names
[] = {
119 [LPORT_ST_DISABLED
] = "disabled",
120 [LPORT_ST_FLOGI
] = "FLOGI",
121 [LPORT_ST_DNS
] = "dNS",
122 [LPORT_ST_RNN_ID
] = "RNN_ID",
123 [LPORT_ST_RSNN_NN
] = "RSNN_NN",
124 [LPORT_ST_RSPN_ID
] = "RSPN_ID",
125 [LPORT_ST_RFT_ID
] = "RFT_ID",
126 [LPORT_ST_RFF_ID
] = "RFF_ID",
127 [LPORT_ST_SCR
] = "SCR",
128 [LPORT_ST_READY
] = "Ready",
129 [LPORT_ST_LOGO
] = "LOGO",
130 [LPORT_ST_RESET
] = "reset",
134 * struct fc_bsg_info - FC Passthrough managemet structure
135 * @job: The passthrough job
136 * @lport: The local port to pass through a command
137 * @rsp_code: The expected response code
138 * @sg: job->reply_payload.sg_list
139 * @nents: job->reply_payload.sg_cnt
140 * @offset: The offset into the response data
143 struct fc_bsg_job
*job
;
144 struct fc_lport
*lport
;
146 struct scatterlist
*sg
;
152 * fc_frame_drop() - Dummy frame handler
153 * @lport: The local port the frame was received on
154 * @fp: The received frame
156 static int fc_frame_drop(struct fc_lport
*lport
, struct fc_frame
*fp
)
163 * fc_lport_rport_callback() - Event handler for rport events
164 * @lport: The lport which is receiving the event
165 * @rdata: private remote port data
166 * @event: The event that occured
168 * Locking Note: The rport lock should not be held when calling
171 static void fc_lport_rport_callback(struct fc_lport
*lport
,
172 struct fc_rport_priv
*rdata
,
173 enum fc_rport_event event
)
175 FC_LPORT_DBG(lport
, "Received a %d event for port (%6.6x)\n", event
,
178 mutex_lock(&lport
->lp_mutex
);
181 if (lport
->state
== LPORT_ST_DNS
) {
182 lport
->dns_rdata
= rdata
;
183 fc_lport_enter_ns(lport
, LPORT_ST_RNN_ID
);
185 FC_LPORT_DBG(lport
, "Received an READY event "
186 "on port (%6.6x) for the directory "
187 "server, but the lport is not "
188 "in the DNS state, it's in the "
189 "%d state", rdata
->ids
.port_id
,
191 lport
->tt
.rport_logoff(rdata
);
195 case RPORT_EV_FAILED
:
197 lport
->dns_rdata
= NULL
;
202 mutex_unlock(&lport
->lp_mutex
);
206 * fc_lport_state() - Return a string which represents the lport's state
207 * @lport: The lport whose state is to converted to a string
209 static const char *fc_lport_state(struct fc_lport
*lport
)
213 cp
= fc_lport_state_names
[lport
->state
];
220 * fc_lport_ptp_setup() - Create an rport for point-to-point mode
221 * @lport: The lport to attach the ptp rport to
222 * @remote_fid: The FID of the ptp rport
223 * @remote_wwpn: The WWPN of the ptp rport
224 * @remote_wwnn: The WWNN of the ptp rport
226 static void fc_lport_ptp_setup(struct fc_lport
*lport
,
227 u32 remote_fid
, u64 remote_wwpn
,
230 mutex_lock(&lport
->disc
.disc_mutex
);
231 if (lport
->ptp_rdata
) {
232 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
233 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
235 lport
->ptp_rdata
= lport
->tt
.rport_create(lport
, remote_fid
);
236 kref_get(&lport
->ptp_rdata
->kref
);
237 lport
->ptp_rdata
->ids
.port_name
= remote_wwpn
;
238 lport
->ptp_rdata
->ids
.node_name
= remote_wwnn
;
239 mutex_unlock(&lport
->disc
.disc_mutex
);
241 lport
->tt
.rport_login(lport
->ptp_rdata
);
243 fc_lport_enter_ready(lport
);
247 * fc_get_host_port_state() - Return the port state of the given Scsi_Host
248 * @shost: The SCSI host whose port state is to be determined
250 void fc_get_host_port_state(struct Scsi_Host
*shost
)
252 struct fc_lport
*lport
= shost_priv(shost
);
254 mutex_lock(&lport
->lp_mutex
);
256 fc_host_port_state(shost
) = FC_PORTSTATE_LINKDOWN
;
258 switch (lport
->state
) {
260 fc_host_port_state(shost
) = FC_PORTSTATE_ONLINE
;
263 fc_host_port_state(shost
) = FC_PORTSTATE_OFFLINE
;
265 mutex_unlock(&lport
->lp_mutex
);
267 EXPORT_SYMBOL(fc_get_host_port_state
);
270 * fc_get_host_speed() - Return the speed of the given Scsi_Host
271 * @shost: The SCSI host whose port speed is to be determined
273 void fc_get_host_speed(struct Scsi_Host
*shost
)
275 struct fc_lport
*lport
= shost_priv(shost
);
277 fc_host_speed(shost
) = lport
->link_speed
;
279 EXPORT_SYMBOL(fc_get_host_speed
);
282 * fc_get_host_stats() - Return the Scsi_Host's statistics
283 * @shost: The SCSI host whose statistics are to be returned
285 struct fc_host_statistics
*fc_get_host_stats(struct Scsi_Host
*shost
)
287 struct fc_host_statistics
*fcoe_stats
;
288 struct fc_lport
*lport
= shost_priv(shost
);
289 struct timespec v0
, v1
;
291 u64 fcp_in_bytes
= 0;
292 u64 fcp_out_bytes
= 0;
294 fcoe_stats
= &lport
->host_stats
;
295 memset(fcoe_stats
, 0, sizeof(struct fc_host_statistics
));
297 jiffies_to_timespec(jiffies
, &v0
);
298 jiffies_to_timespec(lport
->boot_time
, &v1
);
299 fcoe_stats
->seconds_since_last_reset
= (v0
.tv_sec
- v1
.tv_sec
);
301 for_each_possible_cpu(cpu
) {
302 struct fcoe_dev_stats
*stats
;
304 stats
= per_cpu_ptr(lport
->dev_stats
, cpu
);
306 fcoe_stats
->tx_frames
+= stats
->TxFrames
;
307 fcoe_stats
->tx_words
+= stats
->TxWords
;
308 fcoe_stats
->rx_frames
+= stats
->RxFrames
;
309 fcoe_stats
->rx_words
+= stats
->RxWords
;
310 fcoe_stats
->error_frames
+= stats
->ErrorFrames
;
311 fcoe_stats
->invalid_crc_count
+= stats
->InvalidCRCCount
;
312 fcoe_stats
->fcp_input_requests
+= stats
->InputRequests
;
313 fcoe_stats
->fcp_output_requests
+= stats
->OutputRequests
;
314 fcoe_stats
->fcp_control_requests
+= stats
->ControlRequests
;
315 fcp_in_bytes
+= stats
->InputBytes
;
316 fcp_out_bytes
+= stats
->OutputBytes
;
317 fcoe_stats
->link_failure_count
+= stats
->LinkFailureCount
;
319 fcoe_stats
->fcp_input_megabytes
= div_u64(fcp_in_bytes
, 1000000);
320 fcoe_stats
->fcp_output_megabytes
= div_u64(fcp_out_bytes
, 1000000);
321 fcoe_stats
->lip_count
= -1;
322 fcoe_stats
->nos_count
= -1;
323 fcoe_stats
->loss_of_sync_count
= -1;
324 fcoe_stats
->loss_of_signal_count
= -1;
325 fcoe_stats
->prim_seq_protocol_err_count
= -1;
326 fcoe_stats
->dumped_frames
= -1;
329 EXPORT_SYMBOL(fc_get_host_stats
);
332 * fc_lport_flogi_fill() - Fill in FLOGI command for request
333 * @lport: The local port the FLOGI is for
334 * @flogi: The FLOGI command
337 static void fc_lport_flogi_fill(struct fc_lport
*lport
,
338 struct fc_els_flogi
*flogi
,
341 struct fc_els_csp
*sp
;
342 struct fc_els_cssp
*cp
;
344 memset(flogi
, 0, sizeof(*flogi
));
345 flogi
->fl_cmd
= (u8
) op
;
346 put_unaligned_be64(lport
->wwpn
, &flogi
->fl_wwpn
);
347 put_unaligned_be64(lport
->wwnn
, &flogi
->fl_wwnn
);
349 sp
->sp_hi_ver
= 0x20;
350 sp
->sp_lo_ver
= 0x20;
351 sp
->sp_bb_cred
= htons(10); /* this gets set by gateway */
352 sp
->sp_bb_data
= htons((u16
) lport
->mfs
);
353 cp
= &flogi
->fl_cssp
[3 - 1]; /* class 3 parameters */
354 cp
->cp_class
= htons(FC_CPC_VALID
| FC_CPC_SEQ
);
355 if (op
!= ELS_FLOGI
) {
356 sp
->sp_features
= htons(FC_SP_FT_CIRO
);
357 sp
->sp_tot_seq
= htons(255); /* seq. we accept */
358 sp
->sp_rel_off
= htons(0x1f);
359 sp
->sp_e_d_tov
= htonl(lport
->e_d_tov
);
361 cp
->cp_rdfs
= htons((u16
) lport
->mfs
);
362 cp
->cp_con_seq
= htons(255);
368 * fc_lport_add_fc4_type() - Add a supported FC-4 type to a local port
369 * @lport: The local port to add a new FC-4 type to
370 * @type: The new FC-4 type
372 static void fc_lport_add_fc4_type(struct fc_lport
*lport
, enum fc_fh_type type
)
376 mp
= &lport
->fcts
.ff_type_map
[type
/ FC_NS_BPW
];
377 *mp
= htonl(ntohl(*mp
) | 1UL << (type
% FC_NS_BPW
));
381 * fc_lport_recv_rlir_req() - Handle received Registered Link Incident Report.
382 * @lport: Fibre Channel local port recieving the RLIR
383 * @fp: The RLIR request frame
385 * Locking Note: The lport lock is expected to be held before calling
388 static void fc_lport_recv_rlir_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
390 FC_LPORT_DBG(lport
, "Received RLIR request while in state %s\n",
391 fc_lport_state(lport
));
393 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
398 * fc_lport_recv_echo_req() - Handle received ECHO request
399 * @lport: The local port recieving the ECHO
400 * @fp: ECHO request frame
402 * Locking Note: The lport lock is expected to be held before calling
405 static void fc_lport_recv_echo_req(struct fc_lport
*lport
,
406 struct fc_frame
*in_fp
)
413 FC_LPORT_DBG(lport
, "Received ECHO request while in state %s\n",
414 fc_lport_state(lport
));
416 len
= fr_len(in_fp
) - sizeof(struct fc_frame_header
);
417 pp
= fc_frame_payload_get(in_fp
, len
);
419 if (len
< sizeof(__be32
))
420 len
= sizeof(__be32
);
422 fp
= fc_frame_alloc(lport
, len
);
424 dp
= fc_frame_payload_get(fp
, len
);
426 *((__be32
*)dp
) = htonl(ELS_LS_ACC
<< 24);
427 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
428 lport
->tt
.frame_send(lport
, fp
);
430 fc_frame_free(in_fp
);
434 * fc_lport_recv_rnid_req() - Handle received Request Node ID data request
435 * @lport: The local port recieving the RNID
436 * @fp: The RNID request frame
438 * Locking Note: The lport lock is expected to be held before calling
441 static void fc_lport_recv_rnid_req(struct fc_lport
*lport
,
442 struct fc_frame
*in_fp
)
445 struct fc_els_rnid
*req
;
447 struct fc_els_rnid_resp rnid
;
448 struct fc_els_rnid_cid cid
;
449 struct fc_els_rnid_gen gen
;
451 struct fc_seq_els_data rjt_data
;
455 FC_LPORT_DBG(lport
, "Received RNID request while in state %s\n",
456 fc_lport_state(lport
));
458 req
= fc_frame_payload_get(in_fp
, sizeof(*req
));
460 rjt_data
.reason
= ELS_RJT_LOGIC
;
461 rjt_data
.explan
= ELS_EXPL_NONE
;
462 lport
->tt
.seq_els_rsp_send(in_fp
, ELS_LS_RJT
, &rjt_data
);
466 if (fmt
!= ELS_RNIDF_GEN
||
467 ntohl(lport
->rnid_gen
.rnid_atype
) == 0) {
468 fmt
= ELS_RNIDF_NONE
; /* nothing to provide */
469 len
-= sizeof(rp
->gen
);
471 fp
= fc_frame_alloc(lport
, len
);
473 rp
= fc_frame_payload_get(fp
, len
);
475 rp
->rnid
.rnid_cmd
= ELS_LS_ACC
;
476 rp
->rnid
.rnid_fmt
= fmt
;
477 rp
->rnid
.rnid_cid_len
= sizeof(rp
->cid
);
478 rp
->cid
.rnid_wwpn
= htonll(lport
->wwpn
);
479 rp
->cid
.rnid_wwnn
= htonll(lport
->wwnn
);
480 if (fmt
== ELS_RNIDF_GEN
) {
481 rp
->rnid
.rnid_sid_len
= sizeof(rp
->gen
);
482 memcpy(&rp
->gen
, &lport
->rnid_gen
,
485 fc_fill_reply_hdr(fp
, in_fp
, FC_RCTL_ELS_REP
, 0);
486 lport
->tt
.frame_send(lport
, fp
);
489 fc_frame_free(in_fp
);
493 * fc_lport_recv_logo_req() - Handle received fabric LOGO request
494 * @lport: The local port recieving the LOGO
495 * @fp: The LOGO request frame
497 * Locking Note: The lport lock is exected to be held before calling
500 static void fc_lport_recv_logo_req(struct fc_lport
*lport
, struct fc_frame
*fp
)
502 lport
->tt
.seq_els_rsp_send(fp
, ELS_LS_ACC
, NULL
);
503 fc_lport_enter_reset(lport
);
508 * fc_fabric_login() - Start the lport state machine
509 * @lport: The local port that should log into the fabric
511 * Locking Note: This function should not be called
512 * with the lport lock held.
514 int fc_fabric_login(struct fc_lport
*lport
)
518 mutex_lock(&lport
->lp_mutex
);
519 if (lport
->state
== LPORT_ST_DISABLED
||
520 lport
->state
== LPORT_ST_LOGO
) {
521 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
522 fc_lport_enter_reset(lport
);
525 mutex_unlock(&lport
->lp_mutex
);
529 EXPORT_SYMBOL(fc_fabric_login
);
532 * __fc_linkup() - Handler for transport linkup events
533 * @lport: The lport whose link is up
535 * Locking: must be called with the lp_mutex held
537 void __fc_linkup(struct fc_lport
*lport
)
539 if (!lport
->link_up
) {
542 if (lport
->state
== LPORT_ST_RESET
)
543 fc_lport_enter_flogi(lport
);
548 * fc_linkup() - Handler for transport linkup events
549 * @lport: The local port whose link is up
551 void fc_linkup(struct fc_lport
*lport
)
553 printk(KERN_INFO
"host%d: libfc: Link up on port (%6.6x)\n",
554 lport
->host
->host_no
, lport
->port_id
);
556 mutex_lock(&lport
->lp_mutex
);
558 mutex_unlock(&lport
->lp_mutex
);
560 EXPORT_SYMBOL(fc_linkup
);
563 * __fc_linkdown() - Handler for transport linkdown events
564 * @lport: The lport whose link is down
566 * Locking: must be called with the lp_mutex held
568 void __fc_linkdown(struct fc_lport
*lport
)
570 if (lport
->link_up
) {
572 fc_lport_enter_reset(lport
);
573 lport
->tt
.fcp_cleanup(lport
);
578 * fc_linkdown() - Handler for transport linkdown events
579 * @lport: The local port whose link is down
581 void fc_linkdown(struct fc_lport
*lport
)
583 printk(KERN_INFO
"host%d: libfc: Link down on port (%6.6x)\n",
584 lport
->host
->host_no
, lport
->port_id
);
586 mutex_lock(&lport
->lp_mutex
);
587 __fc_linkdown(lport
);
588 mutex_unlock(&lport
->lp_mutex
);
590 EXPORT_SYMBOL(fc_linkdown
);
593 * fc_fabric_logoff() - Logout of the fabric
594 * @lport: The local port to logoff the fabric
597 * 0 for success, -1 for failure
599 int fc_fabric_logoff(struct fc_lport
*lport
)
601 lport
->tt
.disc_stop_final(lport
);
602 mutex_lock(&lport
->lp_mutex
);
603 if (lport
->dns_rdata
)
604 lport
->tt
.rport_logoff(lport
->dns_rdata
);
605 mutex_unlock(&lport
->lp_mutex
);
606 lport
->tt
.rport_flush_queue();
607 mutex_lock(&lport
->lp_mutex
);
608 fc_lport_enter_logo(lport
);
609 mutex_unlock(&lport
->lp_mutex
);
610 cancel_delayed_work_sync(&lport
->retry_work
);
613 EXPORT_SYMBOL(fc_fabric_logoff
);
616 * fc_lport_destroy() - Unregister a fc_lport
617 * @lport: The local port to unregister
620 * exit routine for fc_lport instance
621 * clean-up all the allocated memory
622 * and free up other system resources.
625 int fc_lport_destroy(struct fc_lport
*lport
)
627 mutex_lock(&lport
->lp_mutex
);
628 lport
->state
= LPORT_ST_DISABLED
;
630 lport
->tt
.frame_send
= fc_frame_drop
;
631 mutex_unlock(&lport
->lp_mutex
);
633 lport
->tt
.fcp_abort_io(lport
);
634 lport
->tt
.disc_stop_final(lport
);
635 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
638 EXPORT_SYMBOL(fc_lport_destroy
);
641 * fc_set_mfs() - Set the maximum frame size for a local port
642 * @lport: The local port to set the MFS for
645 int fc_set_mfs(struct fc_lport
*lport
, u32 mfs
)
647 unsigned int old_mfs
;
650 mutex_lock(&lport
->lp_mutex
);
652 old_mfs
= lport
->mfs
;
654 if (mfs
>= FC_MIN_MAX_FRAME
) {
656 if (mfs
> FC_MAX_FRAME
)
658 mfs
-= sizeof(struct fc_frame_header
);
663 if (!rc
&& mfs
< old_mfs
)
664 fc_lport_enter_reset(lport
);
666 mutex_unlock(&lport
->lp_mutex
);
670 EXPORT_SYMBOL(fc_set_mfs
);
673 * fc_lport_disc_callback() - Callback for discovery events
674 * @lport: The local port receiving the event
675 * @event: The discovery event
677 void fc_lport_disc_callback(struct fc_lport
*lport
, enum fc_disc_event event
)
680 case DISC_EV_SUCCESS
:
681 FC_LPORT_DBG(lport
, "Discovery succeeded\n");
684 printk(KERN_ERR
"host%d: libfc: "
685 "Discovery failed for port (%6.6x)\n",
686 lport
->host
->host_no
, lport
->port_id
);
687 mutex_lock(&lport
->lp_mutex
);
688 fc_lport_enter_reset(lport
);
689 mutex_unlock(&lport
->lp_mutex
);
698 * fc_rport_enter_ready() - Enter the ready state and start discovery
699 * @lport: The local port that is ready
701 * Locking Note: The lport lock is expected to be held before calling
704 static void fc_lport_enter_ready(struct fc_lport
*lport
)
706 FC_LPORT_DBG(lport
, "Entered READY from state %s\n",
707 fc_lport_state(lport
));
709 fc_lport_state_enter(lport
, LPORT_ST_READY
);
711 fc_vport_set_state(lport
->vport
, FC_VPORT_ACTIVE
);
712 fc_vports_linkchange(lport
);
714 if (!lport
->ptp_rdata
)
715 lport
->tt
.disc_start(fc_lport_disc_callback
, lport
);
719 * fc_lport_set_port_id() - set the local port Port ID
720 * @lport: The local port which will have its Port ID set.
721 * @port_id: The new port ID.
722 * @fp: The frame containing the incoming request, or NULL.
724 * Locking Note: The lport lock is expected to be held before calling
727 static void fc_lport_set_port_id(struct fc_lport
*lport
, u32 port_id
,
731 printk(KERN_INFO
"host%d: Assigned Port ID %6.6x\n",
732 lport
->host
->host_no
, port_id
);
734 lport
->port_id
= port_id
;
736 /* Update the fc_host */
737 fc_host_port_id(lport
->host
) = port_id
;
739 if (lport
->tt
.lport_set_port_id
)
740 lport
->tt
.lport_set_port_id(lport
, port_id
, fp
);
744 * fc_lport_set_port_id() - set the local port Port ID for point-to-multipoint
745 * @lport: The local port which will have its Port ID set.
746 * @port_id: The new port ID.
748 * Called by the lower-level driver when transport sets the local port_id.
749 * This is used in VN_port to VN_port mode for FCoE, and causes FLOGI and
750 * discovery to be skipped.
752 void fc_lport_set_local_id(struct fc_lport
*lport
, u32 port_id
)
754 mutex_lock(&lport
->lp_mutex
);
756 fc_lport_set_port_id(lport
, port_id
, NULL
);
758 switch (lport
->state
) {
762 fc_lport_enter_ready(lport
);
767 mutex_unlock(&lport
->lp_mutex
);
769 EXPORT_SYMBOL(fc_lport_set_local_id
);
772 * fc_lport_recv_flogi_req() - Receive a FLOGI request
773 * @lport: The local port that recieved the request
774 * @rx_fp: The FLOGI frame
776 * A received FLOGI request indicates a point-to-point connection.
777 * Accept it with the common service parameters indicating our N port.
778 * Set up to do a PLOGI if we have the higher-number WWPN.
780 * Locking Note: The lport lock is expected to be held before calling
783 static void fc_lport_recv_flogi_req(struct fc_lport
*lport
,
784 struct fc_frame
*rx_fp
)
787 struct fc_frame_header
*fh
;
788 struct fc_els_flogi
*flp
;
789 struct fc_els_flogi
*new_flp
;
794 FC_LPORT_DBG(lport
, "Received FLOGI request while in state %s\n",
795 fc_lport_state(lport
));
797 remote_fid
= fc_frame_sid(rx_fp
);
798 flp
= fc_frame_payload_get(rx_fp
, sizeof(*flp
));
801 remote_wwpn
= get_unaligned_be64(&flp
->fl_wwpn
);
802 if (remote_wwpn
== lport
->wwpn
) {
803 printk(KERN_WARNING
"host%d: libfc: Received FLOGI from port "
804 "with same WWPN %16.16llx\n",
805 lport
->host
->host_no
, remote_wwpn
);
808 FC_LPORT_DBG(lport
, "FLOGI from port WWPN %16.16llx\n", remote_wwpn
);
811 * XXX what is the right thing to do for FIDs?
812 * The originator might expect our S_ID to be 0xfffffe.
813 * But if so, both of us could end up with the same FID.
815 local_fid
= FC_LOCAL_PTP_FID_LO
;
816 if (remote_wwpn
< lport
->wwpn
) {
817 local_fid
= FC_LOCAL_PTP_FID_HI
;
818 if (!remote_fid
|| remote_fid
== local_fid
)
819 remote_fid
= FC_LOCAL_PTP_FID_LO
;
820 } else if (!remote_fid
) {
821 remote_fid
= FC_LOCAL_PTP_FID_HI
;
824 fc_lport_set_port_id(lport
, local_fid
, rx_fp
);
826 fp
= fc_frame_alloc(lport
, sizeof(*flp
));
828 new_flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
829 fc_lport_flogi_fill(lport
, new_flp
, ELS_FLOGI
);
830 new_flp
->fl_cmd
= (u8
) ELS_LS_ACC
;
833 * Send the response. If this fails, the originator should
834 * repeat the sequence.
836 fc_fill_reply_hdr(fp
, rx_fp
, FC_RCTL_ELS_REP
, 0);
837 fh
= fc_frame_header_get(fp
);
838 hton24(fh
->fh_s_id
, local_fid
);
839 hton24(fh
->fh_d_id
, remote_fid
);
840 lport
->tt
.frame_send(lport
, fp
);
843 fc_lport_error(lport
, fp
);
845 fc_lport_ptp_setup(lport
, remote_fid
, remote_wwpn
,
846 get_unaligned_be64(&flp
->fl_wwnn
));
848 fc_frame_free(rx_fp
);
852 * fc_lport_recv_els_req() - The generic lport ELS request handler
853 * @lport: The local port that received the request
854 * @fp: The request frame
856 * This function will see if the lport handles the request or
857 * if an rport should handle the request.
859 * Locking Note: This function should not be called with the lport
860 * lock held becuase it will grab the lock.
862 static void fc_lport_recv_els_req(struct fc_lport
*lport
,
865 void (*recv
)(struct fc_lport
*, struct fc_frame
*);
867 mutex_lock(&lport
->lp_mutex
);
870 * Handle special ELS cases like FLOGI, LOGO, and
871 * RSCN here. These don't require a session.
872 * Even if we had a session, it might not be ready.
880 recv
= lport
->tt
.rport_recv_req
;
881 switch (fc_frame_payload_op(fp
)) {
883 if (!lport
->point_to_multipoint
)
884 recv
= fc_lport_recv_flogi_req
;
887 if (fc_frame_sid(fp
) == FC_FID_FLOGI
)
888 recv
= fc_lport_recv_logo_req
;
891 recv
= lport
->tt
.disc_recv_req
;
894 recv
= fc_lport_recv_echo_req
;
897 recv
= fc_lport_recv_rlir_req
;
900 recv
= fc_lport_recv_rnid_req
;
906 mutex_unlock(&lport
->lp_mutex
);
909 static int fc_lport_els_prli(struct fc_rport_priv
*rdata
, u32 spp_len
,
910 const struct fc_els_spp
*spp_in
,
911 struct fc_els_spp
*spp_out
)
913 return FC_SPP_RESP_INVL
;
916 struct fc4_prov fc_lport_els_prov
= {
917 .prli
= fc_lport_els_prli
,
918 .recv
= fc_lport_recv_els_req
,
922 * fc_lport_recv_req() - The generic lport request handler
923 * @lport: The lport that received the request
924 * @fp: The frame the request is in
926 * Locking Note: This function should not be called with the lport
927 * lock held becuase it may grab the lock.
929 static void fc_lport_recv_req(struct fc_lport
*lport
,
932 struct fc_frame_header
*fh
= fc_frame_header_get(fp
);
933 struct fc_seq
*sp
= fr_seq(fp
);
934 struct fc4_prov
*prov
;
937 * Use RCU read lock and module_lock to be sure module doesn't
938 * deregister and get unloaded while we're calling it.
939 * try_module_get() is inlined and accepts a NULL parameter.
940 * Only ELSes and FCP target ops should come through here.
941 * The locking is unfortunate, and a better scheme is being sought.
945 if (fh
->fh_type
>= FC_FC4_PROV_SIZE
)
947 prov
= rcu_dereference(fc_passive_prov
[fh
->fh_type
]);
948 if (!prov
|| !try_module_get(prov
->module
))
951 prov
->recv(lport
, fp
);
952 module_put(prov
->module
);
956 FC_LPORT_DBG(lport
, "dropping unexpected frame type %x\n", fh
->fh_type
);
958 lport
->tt
.exch_done(sp
);
962 * fc_lport_reset() - Reset a local port
963 * @lport: The local port which should be reset
965 * Locking Note: This functions should not be called with the
968 int fc_lport_reset(struct fc_lport
*lport
)
970 cancel_delayed_work_sync(&lport
->retry_work
);
971 mutex_lock(&lport
->lp_mutex
);
972 fc_lport_enter_reset(lport
);
973 mutex_unlock(&lport
->lp_mutex
);
976 EXPORT_SYMBOL(fc_lport_reset
);
979 * fc_lport_reset_locked() - Reset the local port w/ the lport lock held
980 * @lport: The local port to be reset
982 * Locking Note: The lport lock is expected to be held before calling
985 static void fc_lport_reset_locked(struct fc_lport
*lport
)
987 if (lport
->dns_rdata
)
988 lport
->tt
.rport_logoff(lport
->dns_rdata
);
990 if (lport
->ptp_rdata
) {
991 lport
->tt
.rport_logoff(lport
->ptp_rdata
);
992 kref_put(&lport
->ptp_rdata
->kref
, lport
->tt
.rport_destroy
);
993 lport
->ptp_rdata
= NULL
;
996 lport
->tt
.disc_stop(lport
);
998 lport
->tt
.exch_mgr_reset(lport
, 0, 0);
999 fc_host_fabric_name(lport
->host
) = 0;
1001 if (lport
->port_id
&& (!lport
->point_to_multipoint
|| !lport
->link_up
))
1002 fc_lport_set_port_id(lport
, 0, NULL
);
1006 * fc_lport_enter_reset() - Reset the local port
1007 * @lport: The local port to be reset
1009 * Locking Note: The lport lock is expected to be held before calling
1012 static void fc_lport_enter_reset(struct fc_lport
*lport
)
1014 FC_LPORT_DBG(lport
, "Entered RESET state from %s state\n",
1015 fc_lport_state(lport
));
1017 if (lport
->state
== LPORT_ST_DISABLED
|| lport
->state
== LPORT_ST_LOGO
)
1022 fc_vport_set_state(lport
->vport
, FC_VPORT_INITIALIZING
);
1024 fc_vport_set_state(lport
->vport
, FC_VPORT_LINKDOWN
);
1026 fc_lport_state_enter(lport
, LPORT_ST_RESET
);
1027 fc_vports_linkchange(lport
);
1028 fc_lport_reset_locked(lport
);
1030 fc_lport_enter_flogi(lport
);
1034 * fc_lport_enter_disabled() - Disable the local port
1035 * @lport: The local port to be reset
1037 * Locking Note: The lport lock is expected to be held before calling
1040 static void fc_lport_enter_disabled(struct fc_lport
*lport
)
1042 FC_LPORT_DBG(lport
, "Entered disabled state from %s state\n",
1043 fc_lport_state(lport
));
1045 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1046 fc_vports_linkchange(lport
);
1047 fc_lport_reset_locked(lport
);
1051 * fc_lport_error() - Handler for any errors
1052 * @lport: The local port that the error was on
1053 * @fp: The error code encoded in a frame pointer
1055 * If the error was caused by a resource allocation failure
1056 * then wait for half a second and retry, otherwise retry
1057 * after the e_d_tov time.
1059 static void fc_lport_error(struct fc_lport
*lport
, struct fc_frame
*fp
)
1061 unsigned long delay
= 0;
1062 FC_LPORT_DBG(lport
, "Error %ld in state %s, retries %d\n",
1063 PTR_ERR(fp
), fc_lport_state(lport
),
1064 lport
->retry_count
);
1066 if (PTR_ERR(fp
) == -FC_EX_CLOSED
)
1070 * Memory allocation failure, or the exchange timed out
1071 * or we received LS_RJT.
1074 if (lport
->retry_count
< lport
->max_retry_count
) {
1075 lport
->retry_count
++;
1077 delay
= msecs_to_jiffies(500);
1079 delay
= msecs_to_jiffies(lport
->e_d_tov
);
1081 schedule_delayed_work(&lport
->retry_work
, delay
);
1083 fc_lport_enter_reset(lport
);
1087 * fc_lport_ns_resp() - Handle response to a name server
1088 * registration exchange
1089 * @sp: current sequence in exchange
1090 * @fp: response frame
1091 * @lp_arg: Fibre Channel host port instance
1093 * Locking Note: This function will be called without the lport lock
1094 * held, but it will lock, call an _enter_* function or fc_lport_error()
1095 * and then unlock the lport.
1097 static void fc_lport_ns_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1100 struct fc_lport
*lport
= lp_arg
;
1101 struct fc_frame_header
*fh
;
1102 struct fc_ct_hdr
*ct
;
1104 FC_LPORT_DBG(lport
, "Received a ns %s\n", fc_els_resp_type(fp
));
1106 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1109 mutex_lock(&lport
->lp_mutex
);
1111 if (lport
->state
< LPORT_ST_RNN_ID
|| lport
->state
> LPORT_ST_RFF_ID
) {
1112 FC_LPORT_DBG(lport
, "Received a name server response, "
1113 "but in state %s\n", fc_lport_state(lport
));
1120 fc_lport_error(lport
, fp
);
1124 fh
= fc_frame_header_get(fp
);
1125 ct
= fc_frame_payload_get(fp
, sizeof(*ct
));
1127 if (fh
&& ct
&& fh
->fh_type
== FC_TYPE_CT
&&
1128 ct
->ct_fs_type
== FC_FST_DIR
&&
1129 ct
->ct_fs_subtype
== FC_NS_SUBTYPE
&&
1130 ntohs(ct
->ct_cmd
) == FC_FS_ACC
)
1131 switch (lport
->state
) {
1132 case LPORT_ST_RNN_ID
:
1133 fc_lport_enter_ns(lport
, LPORT_ST_RSNN_NN
);
1135 case LPORT_ST_RSNN_NN
:
1136 fc_lport_enter_ns(lport
, LPORT_ST_RSPN_ID
);
1138 case LPORT_ST_RSPN_ID
:
1139 fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1141 case LPORT_ST_RFT_ID
:
1142 fc_lport_enter_ns(lport
, LPORT_ST_RFF_ID
);
1144 case LPORT_ST_RFF_ID
:
1145 fc_lport_enter_scr(lport
);
1148 /* should have already been caught by state checks */
1152 fc_lport_error(lport
, fp
);
1156 mutex_unlock(&lport
->lp_mutex
);
1160 * fc_lport_scr_resp() - Handle response to State Change Register (SCR) request
1161 * @sp: current sequence in SCR exchange
1162 * @fp: response frame
1163 * @lp_arg: Fibre Channel lport port instance that sent the registration request
1165 * Locking Note: This function will be called without the lport lock
1166 * held, but it will lock, call an _enter_* function or fc_lport_error
1167 * and then unlock the lport.
1169 static void fc_lport_scr_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1172 struct fc_lport
*lport
= lp_arg
;
1175 FC_LPORT_DBG(lport
, "Received a SCR %s\n", fc_els_resp_type(fp
));
1177 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1180 mutex_lock(&lport
->lp_mutex
);
1182 if (lport
->state
!= LPORT_ST_SCR
) {
1183 FC_LPORT_DBG(lport
, "Received a SCR response, but in state "
1184 "%s\n", fc_lport_state(lport
));
1191 fc_lport_error(lport
, fp
);
1195 op
= fc_frame_payload_op(fp
);
1196 if (op
== ELS_LS_ACC
)
1197 fc_lport_enter_ready(lport
);
1199 fc_lport_error(lport
, fp
);
1204 mutex_unlock(&lport
->lp_mutex
);
1208 * fc_lport_enter_scr() - Send a SCR (State Change Register) request
1209 * @lport: The local port to register for state changes
1211 * Locking Note: The lport lock is expected to be held before calling
1214 static void fc_lport_enter_scr(struct fc_lport
*lport
)
1216 struct fc_frame
*fp
;
1218 FC_LPORT_DBG(lport
, "Entered SCR state from %s state\n",
1219 fc_lport_state(lport
));
1221 fc_lport_state_enter(lport
, LPORT_ST_SCR
);
1223 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_scr
));
1225 fc_lport_error(lport
, fp
);
1229 if (!lport
->tt
.elsct_send(lport
, FC_FID_FCTRL
, fp
, ELS_SCR
,
1230 fc_lport_scr_resp
, lport
,
1231 2 * lport
->r_a_tov
))
1232 fc_lport_error(lport
, NULL
);
1236 * fc_lport_enter_ns() - register some object with the name server
1237 * @lport: Fibre Channel local port to register
1239 * Locking Note: The lport lock is expected to be held before calling
1242 static void fc_lport_enter_ns(struct fc_lport
*lport
, enum fc_lport_state state
)
1244 struct fc_frame
*fp
;
1246 int size
= sizeof(struct fc_ct_hdr
);
1249 FC_LPORT_DBG(lport
, "Entered %s state from %s state\n",
1250 fc_lport_state_names
[state
],
1251 fc_lport_state(lport
));
1253 fc_lport_state_enter(lport
, state
);
1256 case LPORT_ST_RNN_ID
:
1258 size
+= sizeof(struct fc_ns_rn_id
);
1260 case LPORT_ST_RSNN_NN
:
1261 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1262 /* if there is no symbolic name, skip to RFT_ID */
1264 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1265 cmd
= FC_NS_RSNN_NN
;
1266 size
+= sizeof(struct fc_ns_rsnn
) + len
;
1268 case LPORT_ST_RSPN_ID
:
1269 len
= strnlen(fc_host_symbolic_name(lport
->host
), 255);
1270 /* if there is no symbolic name, skip to RFT_ID */
1272 return fc_lport_enter_ns(lport
, LPORT_ST_RFT_ID
);
1273 cmd
= FC_NS_RSPN_ID
;
1274 size
+= sizeof(struct fc_ns_rspn
) + len
;
1276 case LPORT_ST_RFT_ID
:
1278 size
+= sizeof(struct fc_ns_rft
);
1280 case LPORT_ST_RFF_ID
:
1282 size
+= sizeof(struct fc_ns_rff_id
);
1285 fc_lport_error(lport
, NULL
);
1289 fp
= fc_frame_alloc(lport
, size
);
1291 fc_lport_error(lport
, fp
);
1295 if (!lport
->tt
.elsct_send(lport
, FC_FID_DIR_SERV
, fp
, cmd
,
1297 lport
, 3 * lport
->r_a_tov
))
1298 fc_lport_error(lport
, fp
);
1301 static struct fc_rport_operations fc_lport_rport_ops
= {
1302 .event_callback
= fc_lport_rport_callback
,
1306 * fc_rport_enter_dns() - Create a fc_rport for the name server
1307 * @lport: The local port requesting a remote port for the name server
1309 * Locking Note: The lport lock is expected to be held before calling
1312 static void fc_lport_enter_dns(struct fc_lport
*lport
)
1314 struct fc_rport_priv
*rdata
;
1316 FC_LPORT_DBG(lport
, "Entered DNS state from %s state\n",
1317 fc_lport_state(lport
));
1319 fc_lport_state_enter(lport
, LPORT_ST_DNS
);
1321 mutex_lock(&lport
->disc
.disc_mutex
);
1322 rdata
= lport
->tt
.rport_create(lport
, FC_FID_DIR_SERV
);
1323 mutex_unlock(&lport
->disc
.disc_mutex
);
1327 rdata
->ops
= &fc_lport_rport_ops
;
1328 lport
->tt
.rport_login(rdata
);
1332 fc_lport_error(lport
, NULL
);
1336 * fc_lport_timeout() - Handler for the retry_work timer
1337 * @work: The work struct of the local port
1339 static void fc_lport_timeout(struct work_struct
*work
)
1341 struct fc_lport
*lport
=
1342 container_of(work
, struct fc_lport
,
1345 mutex_lock(&lport
->lp_mutex
);
1347 switch (lport
->state
) {
1348 case LPORT_ST_DISABLED
:
1351 case LPORT_ST_READY
:
1354 case LPORT_ST_RESET
:
1356 case LPORT_ST_FLOGI
:
1357 fc_lport_enter_flogi(lport
);
1360 fc_lport_enter_dns(lport
);
1362 case LPORT_ST_RNN_ID
:
1363 case LPORT_ST_RSNN_NN
:
1364 case LPORT_ST_RSPN_ID
:
1365 case LPORT_ST_RFT_ID
:
1366 case LPORT_ST_RFF_ID
:
1367 fc_lport_enter_ns(lport
, lport
->state
);
1370 fc_lport_enter_scr(lport
);
1373 fc_lport_enter_logo(lport
);
1377 mutex_unlock(&lport
->lp_mutex
);
1381 * fc_lport_logo_resp() - Handle response to LOGO request
1382 * @sp: The sequence that the LOGO was on
1383 * @fp: The LOGO frame
1384 * @lp_arg: The lport port that received the LOGO request
1386 * Locking Note: This function will be called without the lport lock
1387 * held, but it will lock, call an _enter_* function or fc_lport_error()
1388 * and then unlock the lport.
1390 void fc_lport_logo_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1393 struct fc_lport
*lport
= lp_arg
;
1396 FC_LPORT_DBG(lport
, "Received a LOGO %s\n", fc_els_resp_type(fp
));
1398 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1401 mutex_lock(&lport
->lp_mutex
);
1403 if (lport
->state
!= LPORT_ST_LOGO
) {
1404 FC_LPORT_DBG(lport
, "Received a LOGO response, but in state "
1405 "%s\n", fc_lport_state(lport
));
1412 fc_lport_error(lport
, fp
);
1416 op
= fc_frame_payload_op(fp
);
1417 if (op
== ELS_LS_ACC
)
1418 fc_lport_enter_disabled(lport
);
1420 fc_lport_error(lport
, fp
);
1425 mutex_unlock(&lport
->lp_mutex
);
1427 EXPORT_SYMBOL(fc_lport_logo_resp
);
1430 * fc_rport_enter_logo() - Logout of the fabric
1431 * @lport: The local port to be logged out
1433 * Locking Note: The lport lock is expected to be held before calling
1436 static void fc_lport_enter_logo(struct fc_lport
*lport
)
1438 struct fc_frame
*fp
;
1439 struct fc_els_logo
*logo
;
1441 FC_LPORT_DBG(lport
, "Entered LOGO state from %s state\n",
1442 fc_lport_state(lport
));
1444 fc_lport_state_enter(lport
, LPORT_ST_LOGO
);
1445 fc_vports_linkchange(lport
);
1447 fp
= fc_frame_alloc(lport
, sizeof(*logo
));
1449 fc_lport_error(lport
, fp
);
1453 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
, ELS_LOGO
,
1454 fc_lport_logo_resp
, lport
,
1455 2 * lport
->r_a_tov
))
1456 fc_lport_error(lport
, NULL
);
1460 * fc_lport_flogi_resp() - Handle response to FLOGI request
1461 * @sp: The sequence that the FLOGI was on
1462 * @fp: The FLOGI response frame
1463 * @lp_arg: The lport port that received the FLOGI response
1465 * Locking Note: This function will be called without the lport lock
1466 * held, but it will lock, call an _enter_* function or fc_lport_error()
1467 * and then unlock the lport.
1469 void fc_lport_flogi_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1472 struct fc_lport
*lport
= lp_arg
;
1473 struct fc_els_flogi
*flp
;
1476 unsigned int r_a_tov
;
1477 unsigned int e_d_tov
;
1480 FC_LPORT_DBG(lport
, "Received a FLOGI %s\n", fc_els_resp_type(fp
));
1482 if (fp
== ERR_PTR(-FC_EX_CLOSED
))
1485 mutex_lock(&lport
->lp_mutex
);
1487 if (lport
->state
!= LPORT_ST_FLOGI
) {
1488 FC_LPORT_DBG(lport
, "Received a FLOGI response, but in state "
1489 "%s\n", fc_lport_state(lport
));
1496 fc_lport_error(lport
, fp
);
1500 did
= fc_frame_did(fp
);
1501 if (fc_frame_payload_op(fp
) == ELS_LS_ACC
&& did
) {
1502 flp
= fc_frame_payload_get(fp
, sizeof(*flp
));
1504 mfs
= ntohs(flp
->fl_csp
.sp_bb_data
) &
1506 if (mfs
>= FC_SP_MIN_MAX_PAYLOAD
&&
1509 csp_flags
= ntohs(flp
->fl_csp
.sp_features
);
1510 r_a_tov
= ntohl(flp
->fl_csp
.sp_r_a_tov
);
1511 e_d_tov
= ntohl(flp
->fl_csp
.sp_e_d_tov
);
1512 if (csp_flags
& FC_SP_FT_EDTR
)
1515 lport
->npiv_enabled
= !!(csp_flags
& FC_SP_FT_NPIV_ACC
);
1517 if ((csp_flags
& FC_SP_FT_FPORT
) == 0) {
1518 if (e_d_tov
> lport
->e_d_tov
)
1519 lport
->e_d_tov
= e_d_tov
;
1520 lport
->r_a_tov
= 2 * e_d_tov
;
1521 fc_lport_set_port_id(lport
, did
, fp
);
1522 printk(KERN_INFO
"host%d: libfc: "
1523 "Port (%6.6x) entered "
1524 "point-to-point mode\n",
1525 lport
->host
->host_no
, did
);
1526 fc_lport_ptp_setup(lport
, fc_frame_sid(fp
),
1532 lport
->e_d_tov
= e_d_tov
;
1533 lport
->r_a_tov
= r_a_tov
;
1534 fc_host_fabric_name(lport
->host
) =
1535 get_unaligned_be64(&flp
->fl_wwnn
);
1536 fc_lport_set_port_id(lport
, did
, fp
);
1537 fc_lport_enter_dns(lport
);
1541 FC_LPORT_DBG(lport
, "FLOGI RJT or bad response\n");
1542 fc_lport_error(lport
, fp
);
1548 mutex_unlock(&lport
->lp_mutex
);
1550 EXPORT_SYMBOL(fc_lport_flogi_resp
);
1553 * fc_rport_enter_flogi() - Send a FLOGI request to the fabric manager
1554 * @lport: Fibre Channel local port to be logged in to the fabric
1556 * Locking Note: The lport lock is expected to be held before calling
1559 void fc_lport_enter_flogi(struct fc_lport
*lport
)
1561 struct fc_frame
*fp
;
1563 FC_LPORT_DBG(lport
, "Entered FLOGI state from %s state\n",
1564 fc_lport_state(lport
));
1566 fc_lport_state_enter(lport
, LPORT_ST_FLOGI
);
1568 if (lport
->point_to_multipoint
) {
1570 fc_lport_enter_ready(lport
);
1574 fp
= fc_frame_alloc(lport
, sizeof(struct fc_els_flogi
));
1576 return fc_lport_error(lport
, fp
);
1578 if (!lport
->tt
.elsct_send(lport
, FC_FID_FLOGI
, fp
,
1579 lport
->vport
? ELS_FDISC
: ELS_FLOGI
,
1580 fc_lport_flogi_resp
, lport
,
1581 lport
->vport
? 2 * lport
->r_a_tov
:
1583 fc_lport_error(lport
, NULL
);
1587 * fc_lport_config() - Configure a fc_lport
1588 * @lport: The local port to be configured
1590 int fc_lport_config(struct fc_lport
*lport
)
1592 INIT_DELAYED_WORK(&lport
->retry_work
, fc_lport_timeout
);
1593 mutex_init(&lport
->lp_mutex
);
1595 fc_lport_state_enter(lport
, LPORT_ST_DISABLED
);
1597 fc_lport_add_fc4_type(lport
, FC_TYPE_FCP
);
1598 fc_lport_add_fc4_type(lport
, FC_TYPE_CT
);
1602 EXPORT_SYMBOL(fc_lport_config
);
1605 * fc_lport_init() - Initialize the lport layer for a local port
1606 * @lport: The local port to initialize the exchange layer for
1608 int fc_lport_init(struct fc_lport
*lport
)
1610 if (!lport
->tt
.lport_recv
)
1611 lport
->tt
.lport_recv
= fc_lport_recv_req
;
1613 if (!lport
->tt
.lport_reset
)
1614 lport
->tt
.lport_reset
= fc_lport_reset
;
1616 fc_host_port_type(lport
->host
) = FC_PORTTYPE_NPORT
;
1617 fc_host_node_name(lport
->host
) = lport
->wwnn
;
1618 fc_host_port_name(lport
->host
) = lport
->wwpn
;
1619 fc_host_supported_classes(lport
->host
) = FC_COS_CLASS3
;
1620 memset(fc_host_supported_fc4s(lport
->host
), 0,
1621 sizeof(fc_host_supported_fc4s(lport
->host
)));
1622 fc_host_supported_fc4s(lport
->host
)[2] = 1;
1623 fc_host_supported_fc4s(lport
->host
)[7] = 1;
1625 /* This value is also unchanging */
1626 memset(fc_host_active_fc4s(lport
->host
), 0,
1627 sizeof(fc_host_active_fc4s(lport
->host
)));
1628 fc_host_active_fc4s(lport
->host
)[2] = 1;
1629 fc_host_active_fc4s(lport
->host
)[7] = 1;
1630 fc_host_maxframe_size(lport
->host
) = lport
->mfs
;
1631 fc_host_supported_speeds(lport
->host
) = 0;
1632 if (lport
->link_supported_speeds
& FC_PORTSPEED_1GBIT
)
1633 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_1GBIT
;
1634 if (lport
->link_supported_speeds
& FC_PORTSPEED_10GBIT
)
1635 fc_host_supported_speeds(lport
->host
) |= FC_PORTSPEED_10GBIT
;
1639 EXPORT_SYMBOL(fc_lport_init
);
1642 * fc_lport_bsg_resp() - The common response handler for FC Passthrough requests
1643 * @sp: The sequence for the FC Passthrough response
1644 * @fp: The response frame
1645 * @info_arg: The BSG info that the response is for
1647 static void fc_lport_bsg_resp(struct fc_seq
*sp
, struct fc_frame
*fp
,
1650 struct fc_bsg_info
*info
= info_arg
;
1651 struct fc_bsg_job
*job
= info
->job
;
1652 struct fc_lport
*lport
= info
->lport
;
1653 struct fc_frame_header
*fh
;
1658 job
->reply
->result
= (PTR_ERR(fp
) == -FC_EX_CLOSED
) ?
1659 -ECONNABORTED
: -ETIMEDOUT
;
1660 job
->reply_len
= sizeof(uint32_t);
1661 job
->state_flags
|= FC_RQST_STATE_DONE
;
1667 mutex_lock(&lport
->lp_mutex
);
1668 fh
= fc_frame_header_get(fp
);
1669 len
= fr_len(fp
) - sizeof(*fh
);
1670 buf
= fc_frame_payload_get(fp
, 0);
1672 if (fr_sof(fp
) == FC_SOF_I3
&& !ntohs(fh
->fh_seq_cnt
)) {
1673 /* Get the response code from the first frame payload */
1674 unsigned short cmd
= (info
->rsp_code
== FC_FS_ACC
) ?
1675 ntohs(((struct fc_ct_hdr
*)buf
)->ct_cmd
) :
1676 (unsigned short)fc_frame_payload_op(fp
);
1678 /* Save the reply status of the job */
1679 job
->reply
->reply_data
.ctels_reply
.status
=
1680 (cmd
== info
->rsp_code
) ?
1681 FC_CTELS_STATUS_OK
: FC_CTELS_STATUS_REJECT
;
1684 job
->reply
->reply_payload_rcv_len
+=
1685 fc_copy_buffer_to_sglist(buf
, len
, info
->sg
, &info
->nents
,
1686 &info
->offset
, KM_BIO_SRC_IRQ
, NULL
);
1688 if (fr_eof(fp
) == FC_EOF_T
&&
1689 (ntoh24(fh
->fh_f_ctl
) & (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) ==
1690 (FC_FC_LAST_SEQ
| FC_FC_END_SEQ
)) {
1691 if (job
->reply
->reply_payload_rcv_len
>
1692 job
->reply_payload
.payload_len
)
1693 job
->reply
->reply_payload_rcv_len
=
1694 job
->reply_payload
.payload_len
;
1695 job
->reply
->result
= 0;
1696 job
->state_flags
|= FC_RQST_STATE_DONE
;
1701 mutex_unlock(&lport
->lp_mutex
);
1705 * fc_lport_els_request() - Send ELS passthrough request
1706 * @job: The BSG Passthrough job
1707 * @lport: The local port sending the request
1708 * @did: The destination port id
1710 * Locking Note: The lport lock is expected to be held before calling
1713 static int fc_lport_els_request(struct fc_bsg_job
*job
,
1714 struct fc_lport
*lport
,
1717 struct fc_bsg_info
*info
;
1718 struct fc_frame
*fp
;
1719 struct fc_frame_header
*fh
;
1723 fp
= fc_frame_alloc(lport
, job
->request_payload
.payload_len
);
1727 len
= job
->request_payload
.payload_len
;
1728 pp
= fc_frame_payload_get(fp
, len
);
1730 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1731 job
->request_payload
.sg_cnt
,
1734 fh
= fc_frame_header_get(fp
);
1735 fh
->fh_r_ctl
= FC_RCTL_ELS_REQ
;
1736 hton24(fh
->fh_d_id
, did
);
1737 hton24(fh
->fh_s_id
, lport
->port_id
);
1738 fh
->fh_type
= FC_TYPE_ELS
;
1739 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1742 fh
->fh_parm_offset
= 0;
1744 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1751 info
->lport
= lport
;
1752 info
->rsp_code
= ELS_LS_ACC
;
1753 info
->nents
= job
->reply_payload
.sg_cnt
;
1754 info
->sg
= job
->reply_payload
.sg_list
;
1756 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1765 * fc_lport_ct_request() - Send CT Passthrough request
1766 * @job: The BSG Passthrough job
1767 * @lport: The local port sending the request
1768 * @did: The destination FC-ID
1769 * @tov: The timeout period to wait for the response
1771 * Locking Note: The lport lock is expected to be held before calling
1774 static int fc_lport_ct_request(struct fc_bsg_job
*job
,
1775 struct fc_lport
*lport
, u32 did
, u32 tov
)
1777 struct fc_bsg_info
*info
;
1778 struct fc_frame
*fp
;
1779 struct fc_frame_header
*fh
;
1780 struct fc_ct_req
*ct
;
1783 fp
= fc_frame_alloc(lport
, sizeof(struct fc_ct_hdr
) +
1784 job
->request_payload
.payload_len
);
1788 len
= job
->request_payload
.payload_len
;
1789 ct
= fc_frame_payload_get(fp
, len
);
1791 sg_copy_to_buffer(job
->request_payload
.sg_list
,
1792 job
->request_payload
.sg_cnt
,
1795 fh
= fc_frame_header_get(fp
);
1796 fh
->fh_r_ctl
= FC_RCTL_DD_UNSOL_CTL
;
1797 hton24(fh
->fh_d_id
, did
);
1798 hton24(fh
->fh_s_id
, lport
->port_id
);
1799 fh
->fh_type
= FC_TYPE_CT
;
1800 hton24(fh
->fh_f_ctl
, FC_FCTL_REQ
);
1803 fh
->fh_parm_offset
= 0;
1805 info
= kzalloc(sizeof(struct fc_bsg_info
), GFP_KERNEL
);
1812 info
->lport
= lport
;
1813 info
->rsp_code
= FC_FS_ACC
;
1814 info
->nents
= job
->reply_payload
.sg_cnt
;
1815 info
->sg
= job
->reply_payload
.sg_list
;
1817 if (!lport
->tt
.exch_seq_send(lport
, fp
, fc_lport_bsg_resp
,
1826 * fc_lport_bsg_request() - The common entry point for sending
1827 * FC Passthrough requests
1828 * @job: The BSG passthrough job
1830 int fc_lport_bsg_request(struct fc_bsg_job
*job
)
1832 struct request
*rsp
= job
->req
->next_rq
;
1833 struct Scsi_Host
*shost
= job
->shost
;
1834 struct fc_lport
*lport
= shost_priv(shost
);
1835 struct fc_rport
*rport
;
1836 struct fc_rport_priv
*rdata
;
1840 job
->reply
->reply_payload_rcv_len
= 0;
1842 rsp
->resid_len
= job
->reply_payload
.payload_len
;
1844 mutex_lock(&lport
->lp_mutex
);
1846 switch (job
->request
->msgcode
) {
1847 case FC_BSG_RPT_ELS
:
1852 rdata
= rport
->dd_data
;
1853 rc
= fc_lport_els_request(job
, lport
, rport
->port_id
,
1862 rdata
= rport
->dd_data
;
1863 rc
= fc_lport_ct_request(job
, lport
, rport
->port_id
,
1868 did
= ntoh24(job
->request
->rqst_data
.h_ct
.port_id
);
1869 if (did
== FC_FID_DIR_SERV
)
1870 rdata
= lport
->dns_rdata
;
1872 rdata
= lport
->tt
.rport_lookup(lport
, did
);
1877 rc
= fc_lport_ct_request(job
, lport
, did
, rdata
->e_d_tov
);
1880 case FC_BSG_HST_ELS_NOLOGIN
:
1881 did
= ntoh24(job
->request
->rqst_data
.h_els
.port_id
);
1882 rc
= fc_lport_els_request(job
, lport
, did
, lport
->e_d_tov
);
1886 mutex_unlock(&lport
->lp_mutex
);
1889 EXPORT_SYMBOL(fc_lport_bsg_request
);