1 // SPDX-License-Identifier: GPL-2.0
5 * Fibre Channel related functions for the zfcp device driver.
7 * Copyright IBM Corp. 2008, 2017
10 #define KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
13 #include <linux/types.h>
14 #include <linux/slab.h>
15 #include <linux/utsname.h>
16 #include <linux/random.h>
17 #include <linux/bsg-lib.h>
18 #include <scsi/fc/fc_els.h>
19 #include <scsi/libfc.h>
23 struct kmem_cache *zfcp_fc_req_cache;
25 static u32 zfcp_fc_rscn_range_mask[] = {
26 [ELS_ADDR_FMT_PORT] = 0xFFFFFF,
27 [ELS_ADDR_FMT_AREA] = 0xFFFF00,
28 [ELS_ADDR_FMT_DOM] = 0xFF0000,
29 [ELS_ADDR_FMT_FAB] = 0x000000,
32 static bool no_auto_port_rescan;
33 module_param(no_auto_port_rescan, bool, 0600);
34 MODULE_PARM_DESC(no_auto_port_rescan,
35 "no automatic port_rescan (default off)");
37 static unsigned int port_scan_backoff = 500;
38 module_param(port_scan_backoff, uint, 0600);
39 MODULE_PARM_DESC(port_scan_backoff,
40 "upper limit of port scan random backoff in msecs (default 500)");
42 static unsigned int port_scan_ratelimit = 60000;
43 module_param(port_scan_ratelimit, uint, 0600);
44 MODULE_PARM_DESC(port_scan_ratelimit,
45 "minimum interval between port scans in msecs (default 60000)");
47 unsigned int zfcp_fc_port_scan_backoff(void)
49 if (!port_scan_backoff)
51 return get_random_int() % port_scan_backoff;
54 static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)
56 unsigned long interval = msecs_to_jiffies(port_scan_ratelimit);
57 unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff());
59 adapter->next_port_scan = jiffies + interval + backoff;
62 static void zfcp_fc_port_scan(struct zfcp_adapter *adapter)
64 unsigned long now = jiffies;
65 unsigned long next = adapter->next_port_scan;
66 unsigned long delay = 0, max;
68 /* delay only needed within waiting period */
69 if (time_before(now, next)) {
71 /* paranoia: never ever delay scans longer than specified */
72 max = msecs_to_jiffies(port_scan_ratelimit + port_scan_backoff);
73 delay = min(delay, max);
76 queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay);
79 void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter)
81 if (no_auto_port_rescan)
84 zfcp_fc_port_scan(adapter);
87 void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter)
89 if (!no_auto_port_rescan)
92 zfcp_fc_port_scan(adapter);
96 * zfcp_fc_post_event - post event to userspace via fc_transport
97 * @work: work struct with enqueued events
99 void zfcp_fc_post_event(struct work_struct *work)
101 struct zfcp_fc_event *event = NULL, *tmp = NULL;
103 struct zfcp_fc_events *events = container_of(work,
104 struct zfcp_fc_events, work);
105 struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter,
108 spin_lock_bh(&events->list_lock);
109 list_splice_init(&events->list, &tmp_lh);
110 spin_unlock_bh(&events->list_lock);
112 list_for_each_entry_safe(event, tmp, &tmp_lh, list) {
113 fc_host_post_event(adapter->scsi_host, fc_get_event_number(),
114 event->code, event->data);
115 list_del(&event->list);
122 * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
123 * @adapter: The adapter where to enqueue the event
124 * @event_code: The event code (as defined in fc_host_event_code in
125 * scsi_transport_fc.h)
126 * @event_data: The event data (e.g. n_port page in case of els)
128 void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
129 enum fc_host_event_code event_code, u32 event_data)
131 struct zfcp_fc_event *event;
133 event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC);
137 event->code = event_code;
138 event->data = event_data;
140 spin_lock(&adapter->events.list_lock);
141 list_add_tail(&event->list, &adapter->events.list);
142 spin_unlock(&adapter->events.list_lock);
144 queue_work(adapter->work_queue, &adapter->events.work);
147 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
149 if (mutex_lock_interruptible(&wka_port->mutex))
152 if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE ||
153 wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) {
154 wka_port->status = ZFCP_FC_WKA_PORT_OPENING;
155 if (zfcp_fsf_open_wka_port(wka_port))
156 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
159 mutex_unlock(&wka_port->mutex);
161 wait_event(wka_port->completion_wq,
162 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
163 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
165 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
166 atomic_inc(&wka_port->refcount);
172 static void zfcp_fc_wka_port_offline(struct work_struct *work)
174 struct delayed_work *dw = to_delayed_work(work);
175 struct zfcp_fc_wka_port *wka_port =
176 container_of(dw, struct zfcp_fc_wka_port, work);
178 mutex_lock(&wka_port->mutex);
179 if ((atomic_read(&wka_port->refcount) != 0) ||
180 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
183 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
184 if (zfcp_fsf_close_wka_port(wka_port)) {
185 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
186 wake_up(&wka_port->completion_wq);
189 mutex_unlock(&wka_port->mutex);
192 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
194 if (atomic_dec_return(&wka_port->refcount) != 0)
196 /* wait 10 milliseconds, other reqs might pop in */
197 schedule_delayed_work(&wka_port->work, HZ / 100);
200 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
201 struct zfcp_adapter *adapter)
203 init_waitqueue_head(&wka_port->completion_wq);
205 wka_port->adapter = adapter;
206 wka_port->d_id = d_id;
208 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
209 atomic_set(&wka_port->refcount, 0);
210 mutex_init(&wka_port->mutex);
211 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
214 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
216 cancel_delayed_work_sync(&wka->work);
217 mutex_lock(&wka->mutex);
218 wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
219 mutex_unlock(&wka->mutex);
222 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
226 zfcp_fc_wka_port_force_offline(&gs->ms);
227 zfcp_fc_wka_port_force_offline(&gs->ts);
228 zfcp_fc_wka_port_force_offline(&gs->ds);
229 zfcp_fc_wka_port_force_offline(&gs->as);
232 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
233 struct fc_els_rscn_page *page)
236 struct zfcp_adapter *adapter = fsf_req->adapter;
237 struct zfcp_port *port;
239 read_lock_irqsave(&adapter->port_list_lock, flags);
240 list_for_each_entry(port, &adapter->port_list, list) {
241 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
242 zfcp_fc_test_link(port);
244 read_unlock_irqrestore(&adapter->port_list_lock, flags);
247 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
249 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
250 struct zfcp_adapter *adapter = fsf_req->adapter;
251 struct fc_els_rscn *head;
252 struct fc_els_rscn_page *page;
257 head = (struct fc_els_rscn *) status_buffer->payload.data;
258 page = (struct fc_els_rscn_page *) head;
261 no_entries = be16_to_cpu(head->rscn_plen) /
262 sizeof(struct fc_els_rscn_page);
264 if (no_entries > 1) {
265 /* handle failed ports */
267 struct zfcp_port *port;
269 read_lock_irqsave(&adapter->port_list_lock, flags);
270 list_for_each_entry(port, &adapter->port_list, list) {
273 zfcp_erp_port_reopen(port,
274 ZFCP_STATUS_COMMON_ERP_FAILED,
277 read_unlock_irqrestore(&adapter->port_list_lock, flags);
280 for (i = 1; i < no_entries; i++) {
281 /* skip head and start with 1st element */
283 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
284 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
286 zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
289 zfcp_fc_conditional_port_scan(fsf_req->adapter);
292 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
295 struct zfcp_adapter *adapter = req->adapter;
296 struct zfcp_port *port;
298 read_lock_irqsave(&adapter->port_list_lock, flags);
299 list_for_each_entry(port, &adapter->port_list, list)
300 if (port->wwpn == wwpn) {
301 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
304 read_unlock_irqrestore(&adapter->port_list_lock, flags);
307 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
309 struct fsf_status_read_buffer *status_buffer;
310 struct fc_els_flogi *plogi;
312 status_buffer = (struct fsf_status_read_buffer *) req->data;
313 plogi = (struct fc_els_flogi *) status_buffer->payload.data;
314 zfcp_fc_incoming_wwpn(req, be64_to_cpu(plogi->fl_wwpn));
317 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
319 struct fsf_status_read_buffer *status_buffer =
320 (struct fsf_status_read_buffer *)req->data;
321 struct fc_els_logo *logo =
322 (struct fc_els_logo *) status_buffer->payload.data;
324 zfcp_fc_incoming_wwpn(req, be64_to_cpu(logo->fl_n_port_wwn));
328 * zfcp_fc_incoming_els - handle incoming ELS
329 * @fsf_req - request which contains incoming ELS
331 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
333 struct fsf_status_read_buffer *status_buffer =
334 (struct fsf_status_read_buffer *) fsf_req->data;
335 unsigned int els_type = status_buffer->payload.data[0];
337 zfcp_dbf_san_in_els("fciels1", fsf_req);
338 if (els_type == ELS_PLOGI)
339 zfcp_fc_incoming_plogi(fsf_req);
340 else if (els_type == ELS_LOGO)
341 zfcp_fc_incoming_logo(fsf_req);
342 else if (els_type == ELS_RSCN)
343 zfcp_fc_incoming_rscn(fsf_req);
346 static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
348 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
349 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
353 if (gid_pn_rsp->ct_hdr.ct_cmd != cpu_to_be16(FC_FS_ACC))
356 /* looks like a valid d_id */
357 ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
360 static void zfcp_fc_complete(void *data)
365 static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
367 ct_hdr->ct_rev = FC_CT_REV;
368 ct_hdr->ct_fs_type = FC_FST_DIR;
369 ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
370 ct_hdr->ct_cmd = cpu_to_be16(cmd);
371 ct_hdr->ct_mr_size = cpu_to_be16(mr_size / 4);
374 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
375 struct zfcp_fc_req *fc_req)
377 struct zfcp_adapter *adapter = port->adapter;
378 DECLARE_COMPLETION_ONSTACK(completion);
379 struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
380 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
383 /* setup parameters for send generic command */
384 fc_req->ct_els.port = port;
385 fc_req->ct_els.handler = zfcp_fc_complete;
386 fc_req->ct_els.handler_data = &completion;
387 fc_req->ct_els.req = &fc_req->sg_req;
388 fc_req->ct_els.resp = &fc_req->sg_rsp;
389 sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
390 sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
392 zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
393 FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
394 gid_pn_req->gid_pn.fn_wwpn = cpu_to_be64(port->wwpn);
396 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
397 adapter->pool.gid_pn_req,
400 wait_for_completion(&completion);
401 zfcp_fc_ns_gid_pn_eval(fc_req);
407 * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
408 * @port: port where GID_PN request is needed
409 * return: -ENOMEM on error, 0 otherwise
411 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
414 struct zfcp_fc_req *fc_req;
415 struct zfcp_adapter *adapter = port->adapter;
417 fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
421 memset(fc_req, 0, sizeof(*fc_req));
423 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
427 ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
429 zfcp_fc_wka_port_put(&adapter->gs->ds);
431 mempool_free(fc_req, adapter->pool.gid_pn);
435 void zfcp_fc_port_did_lookup(struct work_struct *work)
438 struct zfcp_port *port = container_of(work, struct zfcp_port,
441 ret = zfcp_fc_ns_gid_pn(port);
443 /* could not issue gid_pn for some reason */
444 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
449 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
453 zfcp_erp_port_reopen(port, 0, "fcgpn_3");
455 put_device(&port->dev);
459 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
460 * @port: The zfcp_port to lookup the d_id for.
462 void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
464 get_device(&port->dev);
465 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
466 put_device(&port->dev);
470 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
471 * @port: zfcp_port structure
472 * @plogi: plogi payload
474 * Evaluate PLOGI playload and copy important fields into zfcp_port structure
476 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
478 if (be64_to_cpu(plogi->fl_wwpn) != port->wwpn) {
480 dev_warn(&port->adapter->ccw_device->dev,
481 "A port opened with WWPN 0x%016Lx returned data that "
482 "identifies it as WWPN 0x%016Lx\n",
483 (unsigned long long) port->wwpn,
484 (unsigned long long) be64_to_cpu(plogi->fl_wwpn));
488 port->wwnn = be64_to_cpu(plogi->fl_wwnn);
489 port->maxframe_size = be16_to_cpu(plogi->fl_csp.sp_bb_data);
491 if (plogi->fl_cssp[0].cp_class & cpu_to_be16(FC_CPC_VALID))
492 port->supported_classes |= FC_COS_CLASS1;
493 if (plogi->fl_cssp[1].cp_class & cpu_to_be16(FC_CPC_VALID))
494 port->supported_classes |= FC_COS_CLASS2;
495 if (plogi->fl_cssp[2].cp_class & cpu_to_be16(FC_CPC_VALID))
496 port->supported_classes |= FC_COS_CLASS3;
497 if (plogi->fl_cssp[3].cp_class & cpu_to_be16(FC_CPC_VALID))
498 port->supported_classes |= FC_COS_CLASS4;
501 static void zfcp_fc_adisc_handler(void *data)
503 struct zfcp_fc_req *fc_req = data;
504 struct zfcp_port *port = fc_req->ct_els.port;
505 struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp;
507 if (fc_req->ct_els.status) {
508 /* request rejected or timed out */
509 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
515 port->wwnn = be64_to_cpu(adisc_resp->adisc_wwnn);
517 if ((port->wwpn != be64_to_cpu(adisc_resp->adisc_wwpn)) ||
518 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
519 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
524 /* port is good, unblock rport without going through erp */
525 zfcp_scsi_schedule_rport_register(port);
527 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
528 put_device(&port->dev);
529 kmem_cache_free(zfcp_fc_req_cache, fc_req);
532 static int zfcp_fc_adisc(struct zfcp_port *port)
534 struct zfcp_fc_req *fc_req;
535 struct zfcp_adapter *adapter = port->adapter;
536 struct Scsi_Host *shost = adapter->scsi_host;
539 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC);
543 fc_req->ct_els.port = port;
544 fc_req->ct_els.req = &fc_req->sg_req;
545 fc_req->ct_els.resp = &fc_req->sg_rsp;
546 sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req,
547 sizeof(struct fc_els_adisc));
548 sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp,
549 sizeof(struct fc_els_adisc));
551 fc_req->ct_els.handler = zfcp_fc_adisc_handler;
552 fc_req->ct_els.handler_data = fc_req;
554 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
555 without FC-AL-2 capability, so we don't set it */
556 fc_req->u.adisc.req.adisc_wwpn = cpu_to_be64(fc_host_port_name(shost));
557 fc_req->u.adisc.req.adisc_wwnn = cpu_to_be64(fc_host_node_name(shost));
558 fc_req->u.adisc.req.adisc_cmd = ELS_ADISC;
559 hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost));
561 ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els,
564 kmem_cache_free(zfcp_fc_req_cache, fc_req);
569 void zfcp_fc_link_test_work(struct work_struct *work)
571 struct zfcp_port *port =
572 container_of(work, struct zfcp_port, test_link_work);
575 get_device(&port->dev);
576 port->rport_task = RPORT_DEL;
577 zfcp_scsi_rport_work(&port->rport_work);
579 /* only issue one test command at one time per port */
580 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
583 atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
585 retval = zfcp_fc_adisc(port);
589 /* send of ADISC was not possible */
590 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
591 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1");
594 put_device(&port->dev);
598 * zfcp_fc_test_link - lightweight link test procedure
599 * @port: port to be tested
601 * Test status of a link to a remote port using the ELS command ADISC.
602 * If there is a problem with the remote port, error recovery steps
605 void zfcp_fc_test_link(struct zfcp_port *port)
607 get_device(&port->dev);
608 if (!queue_work(port->adapter->work_queue, &port->test_link_work))
609 put_device(&port->dev);
612 static struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num)
614 struct zfcp_fc_req *fc_req;
616 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
620 if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) {
621 kmem_cache_free(zfcp_fc_req_cache, fc_req);
625 sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req,
626 sizeof(struct zfcp_fc_gpn_ft_req));
631 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req,
632 struct zfcp_adapter *adapter, int max_bytes)
634 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
635 struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req;
636 DECLARE_COMPLETION_ONSTACK(completion);
639 zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes);
640 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
642 ct_els->handler = zfcp_fc_complete;
643 ct_els->handler_data = &completion;
644 ct_els->req = &fc_req->sg_req;
645 ct_els->resp = &fc_req->sg_rsp;
647 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
650 wait_for_completion(&completion);
654 static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
656 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
659 atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status);
661 if ((port->supported_classes != 0) ||
662 !list_empty(&port->unit_list))
665 list_move_tail(&port->list, lh);
668 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req,
669 struct zfcp_adapter *adapter, int max_entries)
671 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
672 struct scatterlist *sg = &fc_req->sg_rsp;
673 struct fc_ct_hdr *hdr = sg_virt(sg);
674 struct fc_gpn_ft_resp *acc = sg_virt(sg);
675 struct zfcp_port *port, *tmp;
677 LIST_HEAD(remove_lh);
679 int ret = 0, x, last = 0;
684 if (hdr->ct_cmd != cpu_to_be16(FC_FS_ACC)) {
685 if (hdr->ct_reason == FC_FS_RJT_UNABL)
686 return -EAGAIN; /* might be a temporary condition */
690 if (hdr->ct_mr_size) {
691 dev_warn(&adapter->ccw_device->dev,
692 "The name server reported %d words residual data\n",
697 /* first entry is the header */
698 for (x = 1; x < max_entries && !last; x++) {
699 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
704 last = acc->fp_flags & FC_NS_FID_LAST;
705 d_id = ntoh24(acc->fp_fid);
707 /* don't attach ports with a well known address */
708 if (d_id >= FC_FID_WELL_KNOWN_BASE)
710 /* skip the adapter's port and known remote ports */
711 if (be64_to_cpu(acc->fp_wwpn) ==
712 fc_host_port_name(adapter->scsi_host))
715 port = zfcp_port_enqueue(adapter, be64_to_cpu(acc->fp_wwpn),
716 ZFCP_STATUS_COMMON_NOESC, d_id);
718 zfcp_erp_port_reopen(port, 0, "fcegpf1");
719 else if (PTR_ERR(port) != -EEXIST)
723 zfcp_erp_wait(adapter);
724 write_lock_irqsave(&adapter->port_list_lock, flags);
725 list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
726 zfcp_fc_validate_port(port, &remove_lh);
727 write_unlock_irqrestore(&adapter->port_list_lock, flags);
729 list_for_each_entry_safe(port, tmp, &remove_lh, list) {
730 zfcp_erp_port_shutdown(port, 0, "fcegpf2");
731 device_unregister(&port->dev);
738 * zfcp_fc_scan_ports - scan remote ports and attach new ports
739 * @work: reference to scheduled work
741 void zfcp_fc_scan_ports(struct work_struct *work)
743 struct delayed_work *dw = to_delayed_work(work);
744 struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter,
747 struct zfcp_fc_req *fc_req;
748 int chain, max_entries, buf_num, max_bytes;
750 zfcp_fc_port_scan_time(adapter);
752 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
753 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1;
754 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE;
755 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE;
757 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
758 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
761 if (zfcp_fc_wka_port_get(&adapter->gs->ds))
764 fc_req = zfcp_alloc_sg_env(buf_num);
768 for (i = 0; i < 3; i++) {
769 ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes);
771 ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries);
778 zfcp_sg_free_table(&fc_req->sg_rsp, buf_num);
779 kmem_cache_free(zfcp_fc_req_cache, fc_req);
781 zfcp_fc_wka_port_put(&adapter->gs->ds);
784 static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
785 struct zfcp_fc_req *fc_req)
787 DECLARE_COMPLETION_ONSTACK(completion);
788 char devno[] = "DEVNO:";
789 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
790 struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
791 struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
794 zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
795 FC_SYMBOLIC_NAME_SIZE);
796 hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
798 sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
799 sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
801 ct_els->handler = zfcp_fc_complete;
802 ct_els->handler_data = &completion;
803 ct_els->req = &fc_req->sg_req;
804 ct_els->resp = &fc_req->sg_rsp;
806 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
811 wait_for_completion(&completion);
813 return ct_els->status;
815 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
816 !(strstr(gspn_rsp->gspn.fp_name, devno)))
817 snprintf(fc_host_symbolic_name(adapter->scsi_host),
818 FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
819 gspn_rsp->gspn.fp_name, devno,
820 dev_name(&adapter->ccw_device->dev),
821 init_utsname()->nodename);
823 strlcpy(fc_host_symbolic_name(adapter->scsi_host),
824 gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
829 static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
830 struct zfcp_fc_req *fc_req)
832 DECLARE_COMPLETION_ONSTACK(completion);
833 struct Scsi_Host *shost = adapter->scsi_host;
834 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
835 struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
836 struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
839 zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
840 FC_SYMBOLIC_NAME_SIZE);
841 hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
842 len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost),
843 FC_SYMBOLIC_NAME_SIZE);
844 rspn_req->rspn.fr_name_len = len;
846 sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
847 sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
849 ct_els->handler = zfcp_fc_complete;
850 ct_els->handler_data = &completion;
851 ct_els->req = &fc_req->sg_req;
852 ct_els->resp = &fc_req->sg_rsp;
854 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
857 wait_for_completion(&completion);
861 * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
862 * @work: ns_up_work of the adapter where to update the symbolic port name
864 * Retrieve the current symbolic port name that may have been set by
865 * the hardware using the GSPN request and update the fc_host
866 * symbolic_name sysfs attribute. When running in NPIV mode (and hence
867 * the port name is unique for this system), update the symbolic port
868 * name to add Linux specific information and update the FC nameserver
869 * using the RSPN request.
871 void zfcp_fc_sym_name_update(struct work_struct *work)
873 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
876 struct zfcp_fc_req *fc_req;
878 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
879 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
882 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
886 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
890 ret = zfcp_fc_gspn(adapter, fc_req);
891 if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
894 memset(fc_req, 0, sizeof(*fc_req));
895 zfcp_fc_rspn(adapter, fc_req);
898 zfcp_fc_wka_port_put(&adapter->gs->ds);
900 kmem_cache_free(zfcp_fc_req_cache, fc_req);
903 static void zfcp_fc_ct_els_job_handler(void *data)
905 struct bsg_job *job = data;
906 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
907 struct fc_bsg_reply *jr = job->reply;
909 jr->reply_payload_rcv_len = job->reply_payload.payload_len;
910 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
911 jr->result = zfcp_ct_els->status ? -EIO : 0;
912 bsg_job_done(job, jr->result, jr->reply_payload_rcv_len);
915 static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct bsg_job *job)
919 struct zfcp_adapter *adapter;
920 struct fc_bsg_request *bsg_request = job->request;
921 struct fc_rport *rport = fc_bsg_to_rport(job);
922 struct Scsi_Host *shost;
924 preamble_word1 = bsg_request->rqst_data.r_ct.preamble_word1;
925 gs_type = (preamble_word1 & 0xff000000) >> 24;
927 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
928 adapter = (struct zfcp_adapter *) shost->hostdata[0];
932 return &adapter->gs->as;
934 return &adapter->gs->ms;
936 return &adapter->gs->ts;
939 return &adapter->gs->ds;
946 static void zfcp_fc_ct_job_handler(void *data)
948 struct bsg_job *job = data;
949 struct zfcp_fc_wka_port *wka_port;
951 wka_port = zfcp_fc_job_wka_port(job);
952 zfcp_fc_wka_port_put(wka_port);
954 zfcp_fc_ct_els_job_handler(data);
957 static int zfcp_fc_exec_els_job(struct bsg_job *job,
958 struct zfcp_adapter *adapter)
960 struct zfcp_fsf_ct_els *els = job->dd_data;
961 struct fc_rport *rport = fc_bsg_to_rport(job);
962 struct fc_bsg_request *bsg_request = job->request;
963 struct zfcp_port *port;
967 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
972 put_device(&port->dev);
974 d_id = ntoh24(bsg_request->rqst_data.h_els.port_id);
976 els->handler = zfcp_fc_ct_els_job_handler;
977 return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ);
980 static int zfcp_fc_exec_ct_job(struct bsg_job *job,
981 struct zfcp_adapter *adapter)
984 struct zfcp_fsf_ct_els *ct = job->dd_data;
985 struct zfcp_fc_wka_port *wka_port;
987 wka_port = zfcp_fc_job_wka_port(job);
991 ret = zfcp_fc_wka_port_get(wka_port);
995 ct->handler = zfcp_fc_ct_job_handler;
996 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ);
998 zfcp_fc_wka_port_put(wka_port);
1003 int zfcp_fc_exec_bsg_job(struct bsg_job *job)
1005 struct Scsi_Host *shost;
1006 struct zfcp_adapter *adapter;
1007 struct zfcp_fsf_ct_els *ct_els = job->dd_data;
1008 struct fc_bsg_request *bsg_request = job->request;
1009 struct fc_rport *rport = fc_bsg_to_rport(job);
1011 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
1012 adapter = (struct zfcp_adapter *)shost->hostdata[0];
1014 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
1017 ct_els->req = job->request_payload.sg_list;
1018 ct_els->resp = job->reply_payload.sg_list;
1019 ct_els->handler_data = job;
1021 switch (bsg_request->msgcode) {
1022 case FC_BSG_RPT_ELS:
1023 case FC_BSG_HST_ELS_NOLOGIN:
1024 return zfcp_fc_exec_els_job(job, adapter);
1027 return zfcp_fc_exec_ct_job(job, adapter);
1033 int zfcp_fc_timeout_bsg_job(struct bsg_job *job)
1035 /* hardware tracks timeout, reset bsg timeout to not interfere */
1039 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
1041 struct zfcp_fc_wka_ports *wka_ports;
1043 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL);
1047 adapter->gs = wka_ports;
1048 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
1049 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
1050 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
1051 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
1056 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)