4 * Fibre Channel related functions for the zfcp device driver.
6 * Copyright IBM Corp. 2008, 2017
9 #define KMSG_COMPONENT "zfcp"
10 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12 #include <linux/types.h>
13 #include <linux/slab.h>
14 #include <linux/utsname.h>
15 #include <linux/random.h>
16 #include <linux/bsg-lib.h>
17 #include <scsi/fc/fc_els.h>
18 #include <scsi/libfc.h>
22 struct kmem_cache
*zfcp_fc_req_cache
;
24 static u32 zfcp_fc_rscn_range_mask
[] = {
25 [ELS_ADDR_FMT_PORT
] = 0xFFFFFF,
26 [ELS_ADDR_FMT_AREA
] = 0xFFFF00,
27 [ELS_ADDR_FMT_DOM
] = 0xFF0000,
28 [ELS_ADDR_FMT_FAB
] = 0x000000,
31 static bool no_auto_port_rescan
;
32 module_param(no_auto_port_rescan
, bool, 0600);
33 MODULE_PARM_DESC(no_auto_port_rescan
,
34 "no automatic port_rescan (default off)");
36 static unsigned int port_scan_backoff
= 500;
37 module_param(port_scan_backoff
, uint
, 0600);
38 MODULE_PARM_DESC(port_scan_backoff
,
39 "upper limit of port scan random backoff in msecs (default 500)");
41 static unsigned int port_scan_ratelimit
= 60000;
42 module_param(port_scan_ratelimit
, uint
, 0600);
43 MODULE_PARM_DESC(port_scan_ratelimit
,
44 "minimum interval between port scans in msecs (default 60000)");
46 unsigned int zfcp_fc_port_scan_backoff(void)
48 if (!port_scan_backoff
)
50 return get_random_int() % port_scan_backoff
;
53 static void zfcp_fc_port_scan_time(struct zfcp_adapter
*adapter
)
55 unsigned long interval
= msecs_to_jiffies(port_scan_ratelimit
);
56 unsigned long backoff
= msecs_to_jiffies(zfcp_fc_port_scan_backoff());
58 adapter
->next_port_scan
= jiffies
+ interval
+ backoff
;
61 static void zfcp_fc_port_scan(struct zfcp_adapter
*adapter
)
63 unsigned long now
= jiffies
;
64 unsigned long next
= adapter
->next_port_scan
;
65 unsigned long delay
= 0, max
;
67 /* delay only needed within waiting period */
68 if (time_before(now
, next
)) {
70 /* paranoia: never ever delay scans longer than specified */
71 max
= msecs_to_jiffies(port_scan_ratelimit
+ port_scan_backoff
);
72 delay
= min(delay
, max
);
75 queue_delayed_work(adapter
->work_queue
, &adapter
->scan_work
, delay
);
78 void zfcp_fc_conditional_port_scan(struct zfcp_adapter
*adapter
)
80 if (no_auto_port_rescan
)
83 zfcp_fc_port_scan(adapter
);
86 void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter
*adapter
)
88 if (!no_auto_port_rescan
)
91 zfcp_fc_port_scan(adapter
);
95 * zfcp_fc_post_event - post event to userspace via fc_transport
96 * @work: work struct with enqueued events
98 void zfcp_fc_post_event(struct work_struct
*work
)
100 struct zfcp_fc_event
*event
= NULL
, *tmp
= NULL
;
102 struct zfcp_fc_events
*events
= container_of(work
,
103 struct zfcp_fc_events
, work
);
104 struct zfcp_adapter
*adapter
= container_of(events
, struct zfcp_adapter
,
107 spin_lock_bh(&events
->list_lock
);
108 list_splice_init(&events
->list
, &tmp_lh
);
109 spin_unlock_bh(&events
->list_lock
);
111 list_for_each_entry_safe(event
, tmp
, &tmp_lh
, list
) {
112 fc_host_post_event(adapter
->scsi_host
, fc_get_event_number(),
113 event
->code
, event
->data
);
114 list_del(&event
->list
);
121 * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
122 * @adapter: The adapter where to enqueue the event
123 * @event_code: The event code (as defined in fc_host_event_code in
124 * scsi_transport_fc.h)
125 * @event_data: The event data (e.g. n_port page in case of els)
127 void zfcp_fc_enqueue_event(struct zfcp_adapter
*adapter
,
128 enum fc_host_event_code event_code
, u32 event_data
)
130 struct zfcp_fc_event
*event
;
132 event
= kmalloc(sizeof(struct zfcp_fc_event
), GFP_ATOMIC
);
136 event
->code
= event_code
;
137 event
->data
= event_data
;
139 spin_lock(&adapter
->events
.list_lock
);
140 list_add_tail(&event
->list
, &adapter
->events
.list
);
141 spin_unlock(&adapter
->events
.list_lock
);
143 queue_work(adapter
->work_queue
, &adapter
->events
.work
);
146 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port
*wka_port
)
148 if (mutex_lock_interruptible(&wka_port
->mutex
))
151 if (wka_port
->status
== ZFCP_FC_WKA_PORT_OFFLINE
||
152 wka_port
->status
== ZFCP_FC_WKA_PORT_CLOSING
) {
153 wka_port
->status
= ZFCP_FC_WKA_PORT_OPENING
;
154 if (zfcp_fsf_open_wka_port(wka_port
))
155 wka_port
->status
= ZFCP_FC_WKA_PORT_OFFLINE
;
158 mutex_unlock(&wka_port
->mutex
);
160 wait_event(wka_port
->completion_wq
,
161 wka_port
->status
== ZFCP_FC_WKA_PORT_ONLINE
||
162 wka_port
->status
== ZFCP_FC_WKA_PORT_OFFLINE
);
164 if (wka_port
->status
== ZFCP_FC_WKA_PORT_ONLINE
) {
165 atomic_inc(&wka_port
->refcount
);
171 static void zfcp_fc_wka_port_offline(struct work_struct
*work
)
173 struct delayed_work
*dw
= to_delayed_work(work
);
174 struct zfcp_fc_wka_port
*wka_port
=
175 container_of(dw
, struct zfcp_fc_wka_port
, work
);
177 mutex_lock(&wka_port
->mutex
);
178 if ((atomic_read(&wka_port
->refcount
) != 0) ||
179 (wka_port
->status
!= ZFCP_FC_WKA_PORT_ONLINE
))
182 wka_port
->status
= ZFCP_FC_WKA_PORT_CLOSING
;
183 if (zfcp_fsf_close_wka_port(wka_port
)) {
184 wka_port
->status
= ZFCP_FC_WKA_PORT_OFFLINE
;
185 wake_up(&wka_port
->completion_wq
);
188 mutex_unlock(&wka_port
->mutex
);
191 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port
*wka_port
)
193 if (atomic_dec_return(&wka_port
->refcount
) != 0)
195 /* wait 10 milliseconds, other reqs might pop in */
196 schedule_delayed_work(&wka_port
->work
, HZ
/ 100);
199 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port
*wka_port
, u32 d_id
,
200 struct zfcp_adapter
*adapter
)
202 init_waitqueue_head(&wka_port
->completion_wq
);
204 wka_port
->adapter
= adapter
;
205 wka_port
->d_id
= d_id
;
207 wka_port
->status
= ZFCP_FC_WKA_PORT_OFFLINE
;
208 atomic_set(&wka_port
->refcount
, 0);
209 mutex_init(&wka_port
->mutex
);
210 INIT_DELAYED_WORK(&wka_port
->work
, zfcp_fc_wka_port_offline
);
213 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port
*wka
)
215 cancel_delayed_work_sync(&wka
->work
);
216 mutex_lock(&wka
->mutex
);
217 wka
->status
= ZFCP_FC_WKA_PORT_OFFLINE
;
218 mutex_unlock(&wka
->mutex
);
221 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports
*gs
)
225 zfcp_fc_wka_port_force_offline(&gs
->ms
);
226 zfcp_fc_wka_port_force_offline(&gs
->ts
);
227 zfcp_fc_wka_port_force_offline(&gs
->ds
);
228 zfcp_fc_wka_port_force_offline(&gs
->as
);
231 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req
*fsf_req
, u32 range
,
232 struct fc_els_rscn_page
*page
)
235 struct zfcp_adapter
*adapter
= fsf_req
->adapter
;
236 struct zfcp_port
*port
;
238 read_lock_irqsave(&adapter
->port_list_lock
, flags
);
239 list_for_each_entry(port
, &adapter
->port_list
, list
) {
240 if ((port
->d_id
& range
) == (ntoh24(page
->rscn_fid
) & range
))
241 zfcp_fc_test_link(port
);
243 zfcp_erp_port_reopen(port
,
244 ZFCP_STATUS_COMMON_ERP_FAILED
,
247 read_unlock_irqrestore(&adapter
->port_list_lock
, flags
);
250 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req
*fsf_req
)
252 struct fsf_status_read_buffer
*status_buffer
= (void *)fsf_req
->data
;
253 struct fc_els_rscn
*head
;
254 struct fc_els_rscn_page
*page
;
259 head
= (struct fc_els_rscn
*) status_buffer
->payload
.data
;
260 page
= (struct fc_els_rscn_page
*) head
;
263 no_entries
= be16_to_cpu(head
->rscn_plen
) /
264 sizeof(struct fc_els_rscn_page
);
266 for (i
= 1; i
< no_entries
; i
++) {
267 /* skip head and start with 1st element */
269 afmt
= page
->rscn_page_flags
& ELS_RSCN_ADDR_FMT_MASK
;
270 _zfcp_fc_incoming_rscn(fsf_req
, zfcp_fc_rscn_range_mask
[afmt
],
272 zfcp_fc_enqueue_event(fsf_req
->adapter
, FCH_EVT_RSCN
,
275 zfcp_fc_conditional_port_scan(fsf_req
->adapter
);
278 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req
*req
, u64 wwpn
)
281 struct zfcp_adapter
*adapter
= req
->adapter
;
282 struct zfcp_port
*port
;
284 read_lock_irqsave(&adapter
->port_list_lock
, flags
);
285 list_for_each_entry(port
, &adapter
->port_list
, list
)
286 if (port
->wwpn
== wwpn
) {
287 zfcp_erp_port_forced_reopen(port
, 0, "fciwwp1");
290 read_unlock_irqrestore(&adapter
->port_list_lock
, flags
);
293 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req
*req
)
295 struct fsf_status_read_buffer
*status_buffer
;
296 struct fc_els_flogi
*plogi
;
298 status_buffer
= (struct fsf_status_read_buffer
*) req
->data
;
299 plogi
= (struct fc_els_flogi
*) status_buffer
->payload
.data
;
300 zfcp_fc_incoming_wwpn(req
, be64_to_cpu(plogi
->fl_wwpn
));
303 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req
*req
)
305 struct fsf_status_read_buffer
*status_buffer
=
306 (struct fsf_status_read_buffer
*)req
->data
;
307 struct fc_els_logo
*logo
=
308 (struct fc_els_logo
*) status_buffer
->payload
.data
;
310 zfcp_fc_incoming_wwpn(req
, be64_to_cpu(logo
->fl_n_port_wwn
));
314 * zfcp_fc_incoming_els - handle incoming ELS
315 * @fsf_req - request which contains incoming ELS
317 void zfcp_fc_incoming_els(struct zfcp_fsf_req
*fsf_req
)
319 struct fsf_status_read_buffer
*status_buffer
=
320 (struct fsf_status_read_buffer
*) fsf_req
->data
;
321 unsigned int els_type
= status_buffer
->payload
.data
[0];
323 zfcp_dbf_san_in_els("fciels1", fsf_req
);
324 if (els_type
== ELS_PLOGI
)
325 zfcp_fc_incoming_plogi(fsf_req
);
326 else if (els_type
== ELS_LOGO
)
327 zfcp_fc_incoming_logo(fsf_req
);
328 else if (els_type
== ELS_RSCN
)
329 zfcp_fc_incoming_rscn(fsf_req
);
332 static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req
*fc_req
)
334 struct zfcp_fsf_ct_els
*ct_els
= &fc_req
->ct_els
;
335 struct zfcp_fc_gid_pn_rsp
*gid_pn_rsp
= &fc_req
->u
.gid_pn
.rsp
;
339 if (gid_pn_rsp
->ct_hdr
.ct_cmd
!= cpu_to_be16(FC_FS_ACC
))
342 /* looks like a valid d_id */
343 ct_els
->port
->d_id
= ntoh24(gid_pn_rsp
->gid_pn
.fp_fid
);
346 static void zfcp_fc_complete(void *data
)
351 static void zfcp_fc_ct_ns_init(struct fc_ct_hdr
*ct_hdr
, u16 cmd
, u16 mr_size
)
353 ct_hdr
->ct_rev
= FC_CT_REV
;
354 ct_hdr
->ct_fs_type
= FC_FST_DIR
;
355 ct_hdr
->ct_fs_subtype
= FC_NS_SUBTYPE
;
356 ct_hdr
->ct_cmd
= cpu_to_be16(cmd
);
357 ct_hdr
->ct_mr_size
= cpu_to_be16(mr_size
/ 4);
360 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port
*port
,
361 struct zfcp_fc_req
*fc_req
)
363 struct zfcp_adapter
*adapter
= port
->adapter
;
364 DECLARE_COMPLETION_ONSTACK(completion
);
365 struct zfcp_fc_gid_pn_req
*gid_pn_req
= &fc_req
->u
.gid_pn
.req
;
366 struct zfcp_fc_gid_pn_rsp
*gid_pn_rsp
= &fc_req
->u
.gid_pn
.rsp
;
369 /* setup parameters for send generic command */
370 fc_req
->ct_els
.port
= port
;
371 fc_req
->ct_els
.handler
= zfcp_fc_complete
;
372 fc_req
->ct_els
.handler_data
= &completion
;
373 fc_req
->ct_els
.req
= &fc_req
->sg_req
;
374 fc_req
->ct_els
.resp
= &fc_req
->sg_rsp
;
375 sg_init_one(&fc_req
->sg_req
, gid_pn_req
, sizeof(*gid_pn_req
));
376 sg_init_one(&fc_req
->sg_rsp
, gid_pn_rsp
, sizeof(*gid_pn_rsp
));
378 zfcp_fc_ct_ns_init(&gid_pn_req
->ct_hdr
,
379 FC_NS_GID_PN
, ZFCP_FC_CT_SIZE_PAGE
);
380 gid_pn_req
->gid_pn
.fn_wwpn
= cpu_to_be64(port
->wwpn
);
382 ret
= zfcp_fsf_send_ct(&adapter
->gs
->ds
, &fc_req
->ct_els
,
383 adapter
->pool
.gid_pn_req
,
386 wait_for_completion(&completion
);
387 zfcp_fc_ns_gid_pn_eval(fc_req
);
393 * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
394 * @port: port where GID_PN request is needed
395 * return: -ENOMEM on error, 0 otherwise
397 static int zfcp_fc_ns_gid_pn(struct zfcp_port
*port
)
400 struct zfcp_fc_req
*fc_req
;
401 struct zfcp_adapter
*adapter
= port
->adapter
;
403 fc_req
= mempool_alloc(adapter
->pool
.gid_pn
, GFP_ATOMIC
);
407 memset(fc_req
, 0, sizeof(*fc_req
));
409 ret
= zfcp_fc_wka_port_get(&adapter
->gs
->ds
);
413 ret
= zfcp_fc_ns_gid_pn_request(port
, fc_req
);
415 zfcp_fc_wka_port_put(&adapter
->gs
->ds
);
417 mempool_free(fc_req
, adapter
->pool
.gid_pn
);
421 void zfcp_fc_port_did_lookup(struct work_struct
*work
)
424 struct zfcp_port
*port
= container_of(work
, struct zfcp_port
,
427 ret
= zfcp_fc_ns_gid_pn(port
);
429 /* could not issue gid_pn for some reason */
430 zfcp_erp_adapter_reopen(port
->adapter
, 0, "fcgpn_1");
435 zfcp_erp_set_port_status(port
, ZFCP_STATUS_COMMON_ERP_FAILED
);
439 zfcp_erp_port_reopen(port
, 0, "fcgpn_3");
441 put_device(&port
->dev
);
445 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
446 * @port: The zfcp_port to lookup the d_id for.
448 void zfcp_fc_trigger_did_lookup(struct zfcp_port
*port
)
450 get_device(&port
->dev
);
451 if (!queue_work(port
->adapter
->work_queue
, &port
->gid_pn_work
))
452 put_device(&port
->dev
);
456 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
457 * @port: zfcp_port structure
458 * @plogi: plogi payload
460 * Evaluate PLOGI playload and copy important fields into zfcp_port structure
462 void zfcp_fc_plogi_evaluate(struct zfcp_port
*port
, struct fc_els_flogi
*plogi
)
464 if (be64_to_cpu(plogi
->fl_wwpn
) != port
->wwpn
) {
466 dev_warn(&port
->adapter
->ccw_device
->dev
,
467 "A port opened with WWPN 0x%016Lx returned data that "
468 "identifies it as WWPN 0x%016Lx\n",
469 (unsigned long long) port
->wwpn
,
470 (unsigned long long) be64_to_cpu(plogi
->fl_wwpn
));
474 port
->wwnn
= be64_to_cpu(plogi
->fl_wwnn
);
475 port
->maxframe_size
= be16_to_cpu(plogi
->fl_csp
.sp_bb_data
);
477 if (plogi
->fl_cssp
[0].cp_class
& cpu_to_be16(FC_CPC_VALID
))
478 port
->supported_classes
|= FC_COS_CLASS1
;
479 if (plogi
->fl_cssp
[1].cp_class
& cpu_to_be16(FC_CPC_VALID
))
480 port
->supported_classes
|= FC_COS_CLASS2
;
481 if (plogi
->fl_cssp
[2].cp_class
& cpu_to_be16(FC_CPC_VALID
))
482 port
->supported_classes
|= FC_COS_CLASS3
;
483 if (plogi
->fl_cssp
[3].cp_class
& cpu_to_be16(FC_CPC_VALID
))
484 port
->supported_classes
|= FC_COS_CLASS4
;
487 static void zfcp_fc_adisc_handler(void *data
)
489 struct zfcp_fc_req
*fc_req
= data
;
490 struct zfcp_port
*port
= fc_req
->ct_els
.port
;
491 struct fc_els_adisc
*adisc_resp
= &fc_req
->u
.adisc
.rsp
;
493 if (fc_req
->ct_els
.status
) {
494 /* request rejected or timed out */
495 zfcp_erp_port_forced_reopen(port
, ZFCP_STATUS_COMMON_ERP_FAILED
,
501 port
->wwnn
= be64_to_cpu(adisc_resp
->adisc_wwnn
);
503 if ((port
->wwpn
!= be64_to_cpu(adisc_resp
->adisc_wwpn
)) ||
504 !(atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_OPEN
)) {
505 zfcp_erp_port_reopen(port
, ZFCP_STATUS_COMMON_ERP_FAILED
,
510 /* port is good, unblock rport without going through erp */
511 zfcp_scsi_schedule_rport_register(port
);
513 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST
, &port
->status
);
514 put_device(&port
->dev
);
515 kmem_cache_free(zfcp_fc_req_cache
, fc_req
);
518 static int zfcp_fc_adisc(struct zfcp_port
*port
)
520 struct zfcp_fc_req
*fc_req
;
521 struct zfcp_adapter
*adapter
= port
->adapter
;
522 struct Scsi_Host
*shost
= adapter
->scsi_host
;
525 fc_req
= kmem_cache_zalloc(zfcp_fc_req_cache
, GFP_ATOMIC
);
529 fc_req
->ct_els
.port
= port
;
530 fc_req
->ct_els
.req
= &fc_req
->sg_req
;
531 fc_req
->ct_els
.resp
= &fc_req
->sg_rsp
;
532 sg_init_one(&fc_req
->sg_req
, &fc_req
->u
.adisc
.req
,
533 sizeof(struct fc_els_adisc
));
534 sg_init_one(&fc_req
->sg_rsp
, &fc_req
->u
.adisc
.rsp
,
535 sizeof(struct fc_els_adisc
));
537 fc_req
->ct_els
.handler
= zfcp_fc_adisc_handler
;
538 fc_req
->ct_els
.handler_data
= fc_req
;
540 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
541 without FC-AL-2 capability, so we don't set it */
542 fc_req
->u
.adisc
.req
.adisc_wwpn
= cpu_to_be64(fc_host_port_name(shost
));
543 fc_req
->u
.adisc
.req
.adisc_wwnn
= cpu_to_be64(fc_host_node_name(shost
));
544 fc_req
->u
.adisc
.req
.adisc_cmd
= ELS_ADISC
;
545 hton24(fc_req
->u
.adisc
.req
.adisc_port_id
, fc_host_port_id(shost
));
547 ret
= zfcp_fsf_send_els(adapter
, port
->d_id
, &fc_req
->ct_els
,
550 kmem_cache_free(zfcp_fc_req_cache
, fc_req
);
555 void zfcp_fc_link_test_work(struct work_struct
*work
)
557 struct zfcp_port
*port
=
558 container_of(work
, struct zfcp_port
, test_link_work
);
561 get_device(&port
->dev
);
562 port
->rport_task
= RPORT_DEL
;
563 zfcp_scsi_rport_work(&port
->rport_work
);
565 /* only issue one test command at one time per port */
566 if (atomic_read(&port
->status
) & ZFCP_STATUS_PORT_LINK_TEST
)
569 atomic_or(ZFCP_STATUS_PORT_LINK_TEST
, &port
->status
);
571 retval
= zfcp_fc_adisc(port
);
575 /* send of ADISC was not possible */
576 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST
, &port
->status
);
577 zfcp_erp_port_forced_reopen(port
, 0, "fcltwk1");
580 put_device(&port
->dev
);
584 * zfcp_fc_test_link - lightweight link test procedure
585 * @port: port to be tested
587 * Test status of a link to a remote port using the ELS command ADISC.
588 * If there is a problem with the remote port, error recovery steps
591 void zfcp_fc_test_link(struct zfcp_port
*port
)
593 get_device(&port
->dev
);
594 if (!queue_work(port
->adapter
->work_queue
, &port
->test_link_work
))
595 put_device(&port
->dev
);
598 static struct zfcp_fc_req
*zfcp_alloc_sg_env(int buf_num
)
600 struct zfcp_fc_req
*fc_req
;
602 fc_req
= kmem_cache_zalloc(zfcp_fc_req_cache
, GFP_KERNEL
);
606 if (zfcp_sg_setup_table(&fc_req
->sg_rsp
, buf_num
)) {
607 kmem_cache_free(zfcp_fc_req_cache
, fc_req
);
611 sg_init_one(&fc_req
->sg_req
, &fc_req
->u
.gpn_ft
.req
,
612 sizeof(struct zfcp_fc_gpn_ft_req
));
617 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req
*fc_req
,
618 struct zfcp_adapter
*adapter
, int max_bytes
)
620 struct zfcp_fsf_ct_els
*ct_els
= &fc_req
->ct_els
;
621 struct zfcp_fc_gpn_ft_req
*req
= &fc_req
->u
.gpn_ft
.req
;
622 DECLARE_COMPLETION_ONSTACK(completion
);
625 zfcp_fc_ct_ns_init(&req
->ct_hdr
, FC_NS_GPN_FT
, max_bytes
);
626 req
->gpn_ft
.fn_fc4_type
= FC_TYPE_FCP
;
628 ct_els
->handler
= zfcp_fc_complete
;
629 ct_els
->handler_data
= &completion
;
630 ct_els
->req
= &fc_req
->sg_req
;
631 ct_els
->resp
= &fc_req
->sg_rsp
;
633 ret
= zfcp_fsf_send_ct(&adapter
->gs
->ds
, ct_els
, NULL
,
636 wait_for_completion(&completion
);
640 static void zfcp_fc_validate_port(struct zfcp_port
*port
, struct list_head
*lh
)
642 if (!(atomic_read(&port
->status
) & ZFCP_STATUS_COMMON_NOESC
))
645 atomic_andnot(ZFCP_STATUS_COMMON_NOESC
, &port
->status
);
647 if ((port
->supported_classes
!= 0) ||
648 !list_empty(&port
->unit_list
))
651 list_move_tail(&port
->list
, lh
);
654 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req
*fc_req
,
655 struct zfcp_adapter
*adapter
, int max_entries
)
657 struct zfcp_fsf_ct_els
*ct_els
= &fc_req
->ct_els
;
658 struct scatterlist
*sg
= &fc_req
->sg_rsp
;
659 struct fc_ct_hdr
*hdr
= sg_virt(sg
);
660 struct fc_gpn_ft_resp
*acc
= sg_virt(sg
);
661 struct zfcp_port
*port
, *tmp
;
663 LIST_HEAD(remove_lh
);
665 int ret
= 0, x
, last
= 0;
670 if (hdr
->ct_cmd
!= cpu_to_be16(FC_FS_ACC
)) {
671 if (hdr
->ct_reason
== FC_FS_RJT_UNABL
)
672 return -EAGAIN
; /* might be a temporary condition */
676 if (hdr
->ct_mr_size
) {
677 dev_warn(&adapter
->ccw_device
->dev
,
678 "The name server reported %d words residual data\n",
683 /* first entry is the header */
684 for (x
= 1; x
< max_entries
&& !last
; x
++) {
685 if (x
% (ZFCP_FC_GPN_FT_ENT_PAGE
+ 1))
690 last
= acc
->fp_flags
& FC_NS_FID_LAST
;
691 d_id
= ntoh24(acc
->fp_fid
);
693 /* don't attach ports with a well known address */
694 if (d_id
>= FC_FID_WELL_KNOWN_BASE
)
696 /* skip the adapter's port and known remote ports */
697 if (be64_to_cpu(acc
->fp_wwpn
) ==
698 fc_host_port_name(adapter
->scsi_host
))
701 port
= zfcp_port_enqueue(adapter
, be64_to_cpu(acc
->fp_wwpn
),
702 ZFCP_STATUS_COMMON_NOESC
, d_id
);
704 zfcp_erp_port_reopen(port
, 0, "fcegpf1");
705 else if (PTR_ERR(port
) != -EEXIST
)
709 zfcp_erp_wait(adapter
);
710 write_lock_irqsave(&adapter
->port_list_lock
, flags
);
711 list_for_each_entry_safe(port
, tmp
, &adapter
->port_list
, list
)
712 zfcp_fc_validate_port(port
, &remove_lh
);
713 write_unlock_irqrestore(&adapter
->port_list_lock
, flags
);
715 list_for_each_entry_safe(port
, tmp
, &remove_lh
, list
) {
716 zfcp_erp_port_shutdown(port
, 0, "fcegpf2");
717 device_unregister(&port
->dev
);
724 * zfcp_fc_scan_ports - scan remote ports and attach new ports
725 * @work: reference to scheduled work
727 void zfcp_fc_scan_ports(struct work_struct
*work
)
729 struct delayed_work
*dw
= to_delayed_work(work
);
730 struct zfcp_adapter
*adapter
= container_of(dw
, struct zfcp_adapter
,
733 struct zfcp_fc_req
*fc_req
;
734 int chain
, max_entries
, buf_num
, max_bytes
;
736 zfcp_fc_port_scan_time(adapter
);
738 chain
= adapter
->adapter_features
& FSF_FEATURE_ELS_CT_CHAINED_SBALS
;
739 buf_num
= chain
? ZFCP_FC_GPN_FT_NUM_BUFS
: 1;
740 max_entries
= chain
? ZFCP_FC_GPN_FT_MAX_ENT
: ZFCP_FC_GPN_FT_ENT_PAGE
;
741 max_bytes
= chain
? ZFCP_FC_GPN_FT_MAX_SIZE
: ZFCP_FC_CT_SIZE_PAGE
;
743 if (fc_host_port_type(adapter
->scsi_host
) != FC_PORTTYPE_NPORT
&&
744 fc_host_port_type(adapter
->scsi_host
) != FC_PORTTYPE_NPIV
)
747 if (zfcp_fc_wka_port_get(&adapter
->gs
->ds
))
750 fc_req
= zfcp_alloc_sg_env(buf_num
);
754 for (i
= 0; i
< 3; i
++) {
755 ret
= zfcp_fc_send_gpn_ft(fc_req
, adapter
, max_bytes
);
757 ret
= zfcp_fc_eval_gpn_ft(fc_req
, adapter
, max_entries
);
764 zfcp_sg_free_table(&fc_req
->sg_rsp
, buf_num
);
765 kmem_cache_free(zfcp_fc_req_cache
, fc_req
);
767 zfcp_fc_wka_port_put(&adapter
->gs
->ds
);
770 static int zfcp_fc_gspn(struct zfcp_adapter
*adapter
,
771 struct zfcp_fc_req
*fc_req
)
773 DECLARE_COMPLETION_ONSTACK(completion
);
774 char devno
[] = "DEVNO:";
775 struct zfcp_fsf_ct_els
*ct_els
= &fc_req
->ct_els
;
776 struct zfcp_fc_gspn_req
*gspn_req
= &fc_req
->u
.gspn
.req
;
777 struct zfcp_fc_gspn_rsp
*gspn_rsp
= &fc_req
->u
.gspn
.rsp
;
780 zfcp_fc_ct_ns_init(&gspn_req
->ct_hdr
, FC_NS_GSPN_ID
,
781 FC_SYMBOLIC_NAME_SIZE
);
782 hton24(gspn_req
->gspn
.fp_fid
, fc_host_port_id(adapter
->scsi_host
));
784 sg_init_one(&fc_req
->sg_req
, gspn_req
, sizeof(*gspn_req
));
785 sg_init_one(&fc_req
->sg_rsp
, gspn_rsp
, sizeof(*gspn_rsp
));
787 ct_els
->handler
= zfcp_fc_complete
;
788 ct_els
->handler_data
= &completion
;
789 ct_els
->req
= &fc_req
->sg_req
;
790 ct_els
->resp
= &fc_req
->sg_rsp
;
792 ret
= zfcp_fsf_send_ct(&adapter
->gs
->ds
, ct_els
, NULL
,
797 wait_for_completion(&completion
);
799 return ct_els
->status
;
801 if (fc_host_port_type(adapter
->scsi_host
) == FC_PORTTYPE_NPIV
&&
802 !(strstr(gspn_rsp
->gspn
.fp_name
, devno
)))
803 snprintf(fc_host_symbolic_name(adapter
->scsi_host
),
804 FC_SYMBOLIC_NAME_SIZE
, "%s%s %s NAME: %s",
805 gspn_rsp
->gspn
.fp_name
, devno
,
806 dev_name(&adapter
->ccw_device
->dev
),
807 init_utsname()->nodename
);
809 strlcpy(fc_host_symbolic_name(adapter
->scsi_host
),
810 gspn_rsp
->gspn
.fp_name
, FC_SYMBOLIC_NAME_SIZE
);
815 static void zfcp_fc_rspn(struct zfcp_adapter
*adapter
,
816 struct zfcp_fc_req
*fc_req
)
818 DECLARE_COMPLETION_ONSTACK(completion
);
819 struct Scsi_Host
*shost
= adapter
->scsi_host
;
820 struct zfcp_fsf_ct_els
*ct_els
= &fc_req
->ct_els
;
821 struct zfcp_fc_rspn_req
*rspn_req
= &fc_req
->u
.rspn
.req
;
822 struct fc_ct_hdr
*rspn_rsp
= &fc_req
->u
.rspn
.rsp
;
825 zfcp_fc_ct_ns_init(&rspn_req
->ct_hdr
, FC_NS_RSPN_ID
,
826 FC_SYMBOLIC_NAME_SIZE
);
827 hton24(rspn_req
->rspn
.fr_fid
.fp_fid
, fc_host_port_id(shost
));
828 len
= strlcpy(rspn_req
->rspn
.fr_name
, fc_host_symbolic_name(shost
),
829 FC_SYMBOLIC_NAME_SIZE
);
830 rspn_req
->rspn
.fr_name_len
= len
;
832 sg_init_one(&fc_req
->sg_req
, rspn_req
, sizeof(*rspn_req
));
833 sg_init_one(&fc_req
->sg_rsp
, rspn_rsp
, sizeof(*rspn_rsp
));
835 ct_els
->handler
= zfcp_fc_complete
;
836 ct_els
->handler_data
= &completion
;
837 ct_els
->req
= &fc_req
->sg_req
;
838 ct_els
->resp
= &fc_req
->sg_rsp
;
840 ret
= zfcp_fsf_send_ct(&adapter
->gs
->ds
, ct_els
, NULL
,
843 wait_for_completion(&completion
);
847 * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
848 * @work: ns_up_work of the adapter where to update the symbolic port name
850 * Retrieve the current symbolic port name that may have been set by
851 * the hardware using the GSPN request and update the fc_host
852 * symbolic_name sysfs attribute. When running in NPIV mode (and hence
853 * the port name is unique for this system), update the symbolic port
854 * name to add Linux specific information and update the FC nameserver
855 * using the RSPN request.
857 void zfcp_fc_sym_name_update(struct work_struct
*work
)
859 struct zfcp_adapter
*adapter
= container_of(work
, struct zfcp_adapter
,
862 struct zfcp_fc_req
*fc_req
;
864 if (fc_host_port_type(adapter
->scsi_host
) != FC_PORTTYPE_NPORT
&&
865 fc_host_port_type(adapter
->scsi_host
) != FC_PORTTYPE_NPIV
)
868 fc_req
= kmem_cache_zalloc(zfcp_fc_req_cache
, GFP_KERNEL
);
872 ret
= zfcp_fc_wka_port_get(&adapter
->gs
->ds
);
876 ret
= zfcp_fc_gspn(adapter
, fc_req
);
877 if (ret
|| fc_host_port_type(adapter
->scsi_host
) != FC_PORTTYPE_NPIV
)
880 memset(fc_req
, 0, sizeof(*fc_req
));
881 zfcp_fc_rspn(adapter
, fc_req
);
884 zfcp_fc_wka_port_put(&adapter
->gs
->ds
);
886 kmem_cache_free(zfcp_fc_req_cache
, fc_req
);
889 static void zfcp_fc_ct_els_job_handler(void *data
)
891 struct bsg_job
*job
= data
;
892 struct zfcp_fsf_ct_els
*zfcp_ct_els
= job
->dd_data
;
893 struct fc_bsg_reply
*jr
= job
->reply
;
895 jr
->reply_payload_rcv_len
= job
->reply_payload
.payload_len
;
896 jr
->reply_data
.ctels_reply
.status
= FC_CTELS_STATUS_OK
;
897 jr
->result
= zfcp_ct_els
->status
? -EIO
: 0;
898 bsg_job_done(job
, jr
->result
, jr
->reply_payload_rcv_len
);
901 static struct zfcp_fc_wka_port
*zfcp_fc_job_wka_port(struct bsg_job
*job
)
905 struct zfcp_adapter
*adapter
;
906 struct fc_bsg_request
*bsg_request
= job
->request
;
907 struct fc_rport
*rport
= fc_bsg_to_rport(job
);
908 struct Scsi_Host
*shost
;
910 preamble_word1
= bsg_request
->rqst_data
.r_ct
.preamble_word1
;
911 gs_type
= (preamble_word1
& 0xff000000) >> 24;
913 shost
= rport
? rport_to_shost(rport
) : fc_bsg_to_shost(job
);
914 adapter
= (struct zfcp_adapter
*) shost
->hostdata
[0];
918 return &adapter
->gs
->as
;
920 return &adapter
->gs
->ms
;
922 return &adapter
->gs
->ts
;
925 return &adapter
->gs
->ds
;
932 static void zfcp_fc_ct_job_handler(void *data
)
934 struct bsg_job
*job
= data
;
935 struct zfcp_fc_wka_port
*wka_port
;
937 wka_port
= zfcp_fc_job_wka_port(job
);
938 zfcp_fc_wka_port_put(wka_port
);
940 zfcp_fc_ct_els_job_handler(data
);
943 static int zfcp_fc_exec_els_job(struct bsg_job
*job
,
944 struct zfcp_adapter
*adapter
)
946 struct zfcp_fsf_ct_els
*els
= job
->dd_data
;
947 struct fc_rport
*rport
= fc_bsg_to_rport(job
);
948 struct fc_bsg_request
*bsg_request
= job
->request
;
949 struct zfcp_port
*port
;
953 port
= zfcp_get_port_by_wwpn(adapter
, rport
->port_name
);
958 put_device(&port
->dev
);
960 d_id
= ntoh24(bsg_request
->rqst_data
.h_els
.port_id
);
962 els
->handler
= zfcp_fc_ct_els_job_handler
;
963 return zfcp_fsf_send_els(adapter
, d_id
, els
, job
->req
->timeout
/ HZ
);
966 static int zfcp_fc_exec_ct_job(struct bsg_job
*job
,
967 struct zfcp_adapter
*adapter
)
970 struct zfcp_fsf_ct_els
*ct
= job
->dd_data
;
971 struct zfcp_fc_wka_port
*wka_port
;
973 wka_port
= zfcp_fc_job_wka_port(job
);
977 ret
= zfcp_fc_wka_port_get(wka_port
);
981 ct
->handler
= zfcp_fc_ct_job_handler
;
982 ret
= zfcp_fsf_send_ct(wka_port
, ct
, NULL
, job
->req
->timeout
/ HZ
);
984 zfcp_fc_wka_port_put(wka_port
);
989 int zfcp_fc_exec_bsg_job(struct bsg_job
*job
)
991 struct Scsi_Host
*shost
;
992 struct zfcp_adapter
*adapter
;
993 struct zfcp_fsf_ct_els
*ct_els
= job
->dd_data
;
994 struct fc_bsg_request
*bsg_request
= job
->request
;
995 struct fc_rport
*rport
= fc_bsg_to_rport(job
);
997 shost
= rport
? rport_to_shost(rport
) : fc_bsg_to_shost(job
);
998 adapter
= (struct zfcp_adapter
*)shost
->hostdata
[0];
1000 if (!(atomic_read(&adapter
->status
) & ZFCP_STATUS_COMMON_OPEN
))
1003 ct_els
->req
= job
->request_payload
.sg_list
;
1004 ct_els
->resp
= job
->reply_payload
.sg_list
;
1005 ct_els
->handler_data
= job
;
1007 switch (bsg_request
->msgcode
) {
1008 case FC_BSG_RPT_ELS
:
1009 case FC_BSG_HST_ELS_NOLOGIN
:
1010 return zfcp_fc_exec_els_job(job
, adapter
);
1013 return zfcp_fc_exec_ct_job(job
, adapter
);
1019 int zfcp_fc_timeout_bsg_job(struct bsg_job
*job
)
1021 /* hardware tracks timeout, reset bsg timeout to not interfere */
1025 int zfcp_fc_gs_setup(struct zfcp_adapter
*adapter
)
1027 struct zfcp_fc_wka_ports
*wka_ports
;
1029 wka_ports
= kzalloc(sizeof(struct zfcp_fc_wka_ports
), GFP_KERNEL
);
1033 adapter
->gs
= wka_ports
;
1034 zfcp_fc_wka_port_init(&wka_ports
->ms
, FC_FID_MGMT_SERV
, adapter
);
1035 zfcp_fc_wka_port_init(&wka_ports
->ts
, FC_FID_TIME_SERV
, adapter
);
1036 zfcp_fc_wka_port_init(&wka_ports
->ds
, FC_FID_DIR_SERV
, adapter
);
1037 zfcp_fc_wka_port_init(&wka_ports
->as
, FC_FID_ALIASES
, adapter
);
1042 void zfcp_fc_gs_destroy(struct zfcp_adapter
*adapter
)