1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * zfcp device driver
4 *
5 * Fibre Channel related functions for the zfcp device driver.
6 *
7 * Copyright IBM Corp. 2008, 2017
8 */
9
10 #define KMSG_COMPONENT "zfcp"
11 #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
12
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>
20 #include "zfcp_ext.h"
21 #include "zfcp_fc.h"
22
23 struct kmem_cache *zfcp_fc_req_cache;
24
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,
30 };
31
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)");
36
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)");
41
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)");
46
zfcp_fc_port_scan_backoff(void)47 unsigned int zfcp_fc_port_scan_backoff(void)
48 {
49 if (!port_scan_backoff)
50 return 0;
51 return get_random_u32_below(port_scan_backoff);
52 }
53
zfcp_fc_port_scan_time(struct zfcp_adapter * adapter)54 static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)
55 {
56 unsigned long interval = msecs_to_jiffies(port_scan_ratelimit);
57 unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff());
58
59 adapter->next_port_scan = jiffies + interval + backoff;
60 }
61
zfcp_fc_port_scan(struct zfcp_adapter * adapter)62 static void zfcp_fc_port_scan(struct zfcp_adapter *adapter)
63 {
64 unsigned long now = jiffies;
65 unsigned long next = adapter->next_port_scan;
66 unsigned long delay = 0, max;
67
68 /* delay only needed within waiting period */
69 if (time_before(now, next)) {
70 delay = next - now;
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);
74 }
75
76 queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay);
77 }
78
zfcp_fc_conditional_port_scan(struct zfcp_adapter * adapter)79 void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter)
80 {
81 if (no_auto_port_rescan)
82 return;
83
84 zfcp_fc_port_scan(adapter);
85 }
86
zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter * adapter)87 void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter)
88 {
89 if (!no_auto_port_rescan)
90 return;
91
92 zfcp_fc_port_scan(adapter);
93 }
94
95 /**
96 * zfcp_fc_post_event - post event to userspace via fc_transport
97 * @work: work struct with enqueued events
98 */
zfcp_fc_post_event(struct work_struct * work)99 void zfcp_fc_post_event(struct work_struct *work)
100 {
101 struct zfcp_fc_event *event = NULL, *tmp = NULL;
102 LIST_HEAD(tmp_lh);
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,
106 events);
107
108 spin_lock_bh(&events->list_lock);
109 list_splice_init(&events->list, &tmp_lh);
110 spin_unlock_bh(&events->list_lock);
111
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);
116 kfree(event);
117 }
118 }
119
120 /**
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)
126 */
zfcp_fc_enqueue_event(struct zfcp_adapter * adapter,enum fc_host_event_code event_code,u32 event_data)127 void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
128 enum fc_host_event_code event_code, u32 event_data)
129 {
130 struct zfcp_fc_event *event;
131
132 event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC);
133 if (!event)
134 return;
135
136 event->code = event_code;
137 event->data = event_data;
138
139 spin_lock(&adapter->events.list_lock);
140 list_add_tail(&event->list, &adapter->events.list);
141 spin_unlock(&adapter->events.list_lock);
142
143 queue_work(adapter->work_queue, &adapter->events.work);
144 }
145
zfcp_fc_wka_port_get(struct zfcp_fc_wka_port * wka_port)146 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
147 {
148 int ret = -EIO;
149
150 if (mutex_lock_interruptible(&wka_port->mutex))
151 return -ERESTARTSYS;
152
153 if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE ||
154 wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) {
155 wka_port->status = ZFCP_FC_WKA_PORT_OPENING;
156 if (zfcp_fsf_open_wka_port(wka_port)) {
157 /* could not even send request, nothing to wait for */
158 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
159 goto out;
160 }
161 }
162
163 wait_event(wka_port->opened,
164 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
165 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
166
167 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
168 atomic_inc(&wka_port->refcount);
169 ret = 0;
170 goto out;
171 }
172 out:
173 mutex_unlock(&wka_port->mutex);
174 return ret;
175 }
176
zfcp_fc_wka_port_offline(struct work_struct * work)177 static void zfcp_fc_wka_port_offline(struct work_struct *work)
178 {
179 struct delayed_work *dw = to_delayed_work(work);
180 struct zfcp_fc_wka_port *wka_port =
181 container_of(dw, struct zfcp_fc_wka_port, work);
182
183 mutex_lock(&wka_port->mutex);
184 if ((atomic_read(&wka_port->refcount) != 0) ||
185 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
186 goto out;
187
188 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
189 if (zfcp_fsf_close_wka_port(wka_port)) {
190 /* could not even send request, nothing to wait for */
191 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
192 goto out;
193 }
194 wait_event(wka_port->closed,
195 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
196 out:
197 mutex_unlock(&wka_port->mutex);
198 }
199
zfcp_fc_wka_port_put(struct zfcp_fc_wka_port * wka_port)200 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
201 {
202 if (atomic_dec_return(&wka_port->refcount) != 0)
203 return;
204 /* wait 10 milliseconds, other reqs might pop in */
205 queue_delayed_work(wka_port->adapter->work_queue, &wka_port->work,
206 msecs_to_jiffies(10));
207 }
208
zfcp_fc_wka_port_init(struct zfcp_fc_wka_port * wka_port,u32 d_id,struct zfcp_adapter * adapter)209 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
210 struct zfcp_adapter *adapter)
211 {
212 init_waitqueue_head(&wka_port->opened);
213 init_waitqueue_head(&wka_port->closed);
214
215 wka_port->adapter = adapter;
216 wka_port->d_id = d_id;
217
218 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
219 atomic_set(&wka_port->refcount, 0);
220 mutex_init(&wka_port->mutex);
221 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
222 }
223
zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port * wka)224 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
225 {
226 cancel_delayed_work_sync(&wka->work);
227 mutex_lock(&wka->mutex);
228 wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
229 mutex_unlock(&wka->mutex);
230 }
231
zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports * gs)232 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
233 {
234 if (!gs)
235 return;
236 zfcp_fc_wka_port_force_offline(&gs->ms);
237 zfcp_fc_wka_port_force_offline(&gs->ts);
238 zfcp_fc_wka_port_force_offline(&gs->ds);
239 zfcp_fc_wka_port_force_offline(&gs->as);
240 }
241
_zfcp_fc_incoming_rscn(struct zfcp_fsf_req * fsf_req,u32 range,struct fc_els_rscn_page * page)242 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
243 struct fc_els_rscn_page *page)
244 {
245 unsigned long flags;
246 struct zfcp_adapter *adapter = fsf_req->adapter;
247 struct zfcp_port *port;
248
249 read_lock_irqsave(&adapter->port_list_lock, flags);
250 list_for_each_entry(port, &adapter->port_list, list) {
251 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
252 zfcp_fc_test_link(port);
253 }
254 read_unlock_irqrestore(&adapter->port_list_lock, flags);
255 }
256
zfcp_fc_incoming_rscn(struct zfcp_fsf_req * fsf_req)257 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
258 {
259 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
260 struct zfcp_adapter *adapter = fsf_req->adapter;
261 struct fc_els_rscn *head;
262 struct fc_els_rscn_page *page;
263 u16 i;
264 u16 no_entries;
265 unsigned int afmt;
266
267 head = (struct fc_els_rscn *) status_buffer->payload.data;
268 page = (struct fc_els_rscn_page *) head;
269
270 /* see FC-FS */
271 no_entries = be16_to_cpu(head->rscn_plen) /
272 sizeof(struct fc_els_rscn_page);
273
274 if (no_entries > 1) {
275 /* handle failed ports */
276 unsigned long flags;
277 struct zfcp_port *port;
278
279 read_lock_irqsave(&adapter->port_list_lock, flags);
280 list_for_each_entry(port, &adapter->port_list, list) {
281 if (port->d_id)
282 continue;
283 zfcp_erp_port_reopen(port,
284 ZFCP_STATUS_COMMON_ERP_FAILED,
285 "fcrscn1");
286 }
287 read_unlock_irqrestore(&adapter->port_list_lock, flags);
288 }
289
290 for (i = 1; i < no_entries; i++) {
291 /* skip head and start with 1st element */
292 page++;
293 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
294 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
295 page);
296 zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
297 *(u32 *)page);
298 }
299 zfcp_fc_conditional_port_scan(fsf_req->adapter);
300 }
301
zfcp_fc_incoming_wwpn(struct zfcp_fsf_req * req,u64 wwpn)302 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
303 {
304 unsigned long flags;
305 struct zfcp_adapter *adapter = req->adapter;
306 struct zfcp_port *port;
307
308 read_lock_irqsave(&adapter->port_list_lock, flags);
309 list_for_each_entry(port, &adapter->port_list, list)
310 if (port->wwpn == wwpn) {
311 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
312 break;
313 }
314 read_unlock_irqrestore(&adapter->port_list_lock, flags);
315 }
316
zfcp_fc_incoming_plogi(struct zfcp_fsf_req * req)317 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
318 {
319 struct fsf_status_read_buffer *status_buffer;
320 struct fc_els_flogi *plogi;
321
322 status_buffer = (struct fsf_status_read_buffer *) req->data;
323 plogi = (struct fc_els_flogi *) status_buffer->payload.data;
324 zfcp_fc_incoming_wwpn(req, be64_to_cpu(plogi->fl_wwpn));
325 }
326
zfcp_fc_incoming_logo(struct zfcp_fsf_req * req)327 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
328 {
329 struct fsf_status_read_buffer *status_buffer =
330 (struct fsf_status_read_buffer *)req->data;
331 struct fc_els_logo *logo =
332 (struct fc_els_logo *) status_buffer->payload.data;
333
334 zfcp_fc_incoming_wwpn(req, be64_to_cpu(logo->fl_n_port_wwn));
335 }
336
337 /**
338 * zfcp_fc_incoming_els - handle incoming ELS
339 * @fsf_req: request which contains incoming ELS
340 */
zfcp_fc_incoming_els(struct zfcp_fsf_req * fsf_req)341 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
342 {
343 struct fsf_status_read_buffer *status_buffer =
344 (struct fsf_status_read_buffer *) fsf_req->data;
345 unsigned int els_type = status_buffer->payload.data[0];
346
347 zfcp_dbf_san_in_els("fciels1", fsf_req);
348 if (els_type == ELS_PLOGI)
349 zfcp_fc_incoming_plogi(fsf_req);
350 else if (els_type == ELS_LOGO)
351 zfcp_fc_incoming_logo(fsf_req);
352 else if (els_type == ELS_RSCN)
353 zfcp_fc_incoming_rscn(fsf_req);
354 }
355
zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req * fc_req)356 static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
357 {
358 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
359 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
360
361 if (ct_els->status)
362 return;
363 if (gid_pn_rsp->ct_hdr.ct_cmd != cpu_to_be16(FC_FS_ACC))
364 return;
365
366 /* looks like a valid d_id */
367 ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
368 }
369
zfcp_fc_complete(void * data)370 static void zfcp_fc_complete(void *data)
371 {
372 complete(data);
373 }
374
zfcp_fc_ct_ns_init(struct fc_ct_hdr * ct_hdr,u16 cmd,u16 mr_size)375 static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
376 {
377 ct_hdr->ct_rev = FC_CT_REV;
378 ct_hdr->ct_fs_type = FC_FST_DIR;
379 ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
380 ct_hdr->ct_cmd = cpu_to_be16(cmd);
381 ct_hdr->ct_mr_size = cpu_to_be16(mr_size / 4);
382 }
383
zfcp_fc_ns_gid_pn_request(struct zfcp_port * port,struct zfcp_fc_req * fc_req)384 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
385 struct zfcp_fc_req *fc_req)
386 {
387 struct zfcp_adapter *adapter = port->adapter;
388 DECLARE_COMPLETION_ONSTACK(completion);
389 struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
390 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
391 int ret;
392
393 /* setup parameters for send generic command */
394 fc_req->ct_els.port = port;
395 fc_req->ct_els.handler = zfcp_fc_complete;
396 fc_req->ct_els.handler_data = &completion;
397 fc_req->ct_els.req = &fc_req->sg_req;
398 fc_req->ct_els.resp = &fc_req->sg_rsp;
399 sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
400 sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
401
402 zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
403 FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
404 gid_pn_req->gid_pn.fn_wwpn = cpu_to_be64(port->wwpn);
405
406 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
407 adapter->pool.gid_pn_req,
408 ZFCP_FC_CTELS_TMO);
409 if (!ret) {
410 wait_for_completion(&completion);
411 zfcp_fc_ns_gid_pn_eval(fc_req);
412 }
413 return ret;
414 }
415
416 /**
417 * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
418 * @port: port where GID_PN request is needed
419 * return: -ENOMEM on error, 0 otherwise
420 */
zfcp_fc_ns_gid_pn(struct zfcp_port * port)421 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
422 {
423 int ret;
424 struct zfcp_fc_req *fc_req;
425 struct zfcp_adapter *adapter = port->adapter;
426
427 fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
428 if (!fc_req)
429 return -ENOMEM;
430
431 memset(fc_req, 0, sizeof(*fc_req));
432
433 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
434 if (ret)
435 goto out;
436
437 ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
438
439 zfcp_fc_wka_port_put(&adapter->gs->ds);
440 out:
441 mempool_free(fc_req, adapter->pool.gid_pn);
442 return ret;
443 }
444
zfcp_fc_port_did_lookup(struct work_struct * work)445 void zfcp_fc_port_did_lookup(struct work_struct *work)
446 {
447 int ret;
448 struct zfcp_port *port = container_of(work, struct zfcp_port,
449 gid_pn_work);
450
451 set_worker_desc("zgidpn%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */
452 ret = zfcp_fc_ns_gid_pn(port);
453 if (ret) {
454 /* could not issue gid_pn for some reason */
455 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
456 goto out;
457 }
458
459 if (!port->d_id) {
460 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
461 goto out;
462 }
463
464 zfcp_erp_port_reopen(port, 0, "fcgpn_3");
465 out:
466 put_device(&port->dev);
467 }
468
469 /**
470 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
471 * @port: The zfcp_port to lookup the d_id for.
472 */
zfcp_fc_trigger_did_lookup(struct zfcp_port * port)473 void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
474 {
475 get_device(&port->dev);
476 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
477 put_device(&port->dev);
478 }
479
480 /**
481 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
482 * @port: zfcp_port structure
483 * @plogi: plogi payload
484 *
485 * Evaluate PLOGI playload and copy important fields into zfcp_port structure
486 */
zfcp_fc_plogi_evaluate(struct zfcp_port * port,struct fc_els_flogi * plogi)487 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
488 {
489 if (be64_to_cpu(plogi->fl_wwpn) != port->wwpn) {
490 port->d_id = 0;
491 dev_warn(&port->adapter->ccw_device->dev,
492 "A port opened with WWPN 0x%016Lx returned data that "
493 "identifies it as WWPN 0x%016Lx\n",
494 (unsigned long long) port->wwpn,
495 (unsigned long long) be64_to_cpu(plogi->fl_wwpn));
496 return;
497 }
498
499 port->wwnn = be64_to_cpu(plogi->fl_wwnn);
500 port->maxframe_size = be16_to_cpu(plogi->fl_csp.sp_bb_data);
501
502 if (plogi->fl_cssp[0].cp_class & cpu_to_be16(FC_CPC_VALID))
503 port->supported_classes |= FC_COS_CLASS1;
504 if (plogi->fl_cssp[1].cp_class & cpu_to_be16(FC_CPC_VALID))
505 port->supported_classes |= FC_COS_CLASS2;
506 if (plogi->fl_cssp[2].cp_class & cpu_to_be16(FC_CPC_VALID))
507 port->supported_classes |= FC_COS_CLASS3;
508 if (plogi->fl_cssp[3].cp_class & cpu_to_be16(FC_CPC_VALID))
509 port->supported_classes |= FC_COS_CLASS4;
510 }
511
zfcp_fc_adisc_handler(void * data)512 static void zfcp_fc_adisc_handler(void *data)
513 {
514 struct zfcp_fc_req *fc_req = data;
515 struct zfcp_port *port = fc_req->ct_els.port;
516 struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp;
517
518 if (fc_req->ct_els.status) {
519 /* request rejected or timed out */
520 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
521 "fcadh_1");
522 goto out;
523 }
524
525 if (!port->wwnn)
526 port->wwnn = be64_to_cpu(adisc_resp->adisc_wwnn);
527
528 if ((port->wwpn != be64_to_cpu(adisc_resp->adisc_wwpn)) ||
529 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
530 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
531 "fcadh_2");
532 goto out;
533 }
534
535 /* re-init to undo drop from zfcp_fc_adisc() */
536 port->d_id = ntoh24(adisc_resp->adisc_port_id);
537 /* port is still good, nothing to do */
538 out:
539 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
540 put_device(&port->dev);
541 kmem_cache_free(zfcp_fc_req_cache, fc_req);
542 }
543
zfcp_fc_adisc(struct zfcp_port * port)544 static int zfcp_fc_adisc(struct zfcp_port *port)
545 {
546 struct zfcp_fc_req *fc_req;
547 struct zfcp_adapter *adapter = port->adapter;
548 struct Scsi_Host *shost = adapter->scsi_host;
549 u32 d_id;
550 int ret;
551
552 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC);
553 if (!fc_req)
554 return -ENOMEM;
555
556 fc_req->ct_els.port = port;
557 fc_req->ct_els.req = &fc_req->sg_req;
558 fc_req->ct_els.resp = &fc_req->sg_rsp;
559 sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req,
560 sizeof(struct fc_els_adisc));
561 sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp,
562 sizeof(struct fc_els_adisc));
563
564 fc_req->ct_els.handler = zfcp_fc_adisc_handler;
565 fc_req->ct_els.handler_data = fc_req;
566
567 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
568 without FC-AL-2 capability, so we don't set it */
569 fc_req->u.adisc.req.adisc_wwpn = cpu_to_be64(fc_host_port_name(shost));
570 fc_req->u.adisc.req.adisc_wwnn = cpu_to_be64(fc_host_node_name(shost));
571 fc_req->u.adisc.req.adisc_cmd = ELS_ADISC;
572 hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost));
573
574 d_id = port->d_id; /* remember as destination for send els below */
575 /*
576 * Force fresh GID_PN lookup on next port recovery.
577 * Must happen after request setup and before sending request,
578 * to prevent race with port->d_id re-init in zfcp_fc_adisc_handler().
579 */
580 port->d_id = 0;
581
582 ret = zfcp_fsf_send_els(adapter, d_id, &fc_req->ct_els,
583 ZFCP_FC_CTELS_TMO);
584 if (ret)
585 kmem_cache_free(zfcp_fc_req_cache, fc_req);
586
587 return ret;
588 }
589
zfcp_fc_link_test_work(struct work_struct * work)590 void zfcp_fc_link_test_work(struct work_struct *work)
591 {
592 struct zfcp_port *port =
593 container_of(work, struct zfcp_port, test_link_work);
594 int retval;
595
596 set_worker_desc("zadisc%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */
597
598 /* only issue one test command at one time per port */
599 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
600 goto out;
601
602 atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
603
604 retval = zfcp_fc_adisc(port);
605 if (retval == 0)
606 return;
607
608 /* send of ADISC was not possible */
609 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
610 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1");
611
612 out:
613 put_device(&port->dev);
614 }
615
616 /**
617 * zfcp_fc_test_link - lightweight link test procedure
618 * @port: port to be tested
619 *
620 * Test status of a link to a remote port using the ELS command ADISC.
621 * If there is a problem with the remote port, error recovery steps
622 * will be triggered.
623 */
zfcp_fc_test_link(struct zfcp_port * port)624 void zfcp_fc_test_link(struct zfcp_port *port)
625 {
626 get_device(&port->dev);
627 if (!queue_work(port->adapter->work_queue, &port->test_link_work))
628 put_device(&port->dev);
629 }
630
631 /**
632 * zfcp_fc_sg_free_table - free memory used by scatterlists
633 * @sg: pointer to scatterlist
634 * @count: number of scatterlist which are to be free'ed
635 * the scatterlist are expected to reference pages always
636 */
zfcp_fc_sg_free_table(struct scatterlist * sg,int count)637 static void zfcp_fc_sg_free_table(struct scatterlist *sg, int count)
638 {
639 int i;
640
641 for (i = 0; i < count; i++, sg = sg_next(sg))
642 if (sg)
643 free_page((unsigned long) sg_virt(sg));
644 else
645 break;
646 }
647
648 /**
649 * zfcp_fc_sg_setup_table - init scatterlist and allocate, assign buffers
650 * @sg: pointer to struct scatterlist
651 * @count: number of scatterlists which should be assigned with buffers
652 * of size page
653 *
654 * Returns: 0 on success, -ENOMEM otherwise
655 */
zfcp_fc_sg_setup_table(struct scatterlist * sg,int count)656 static int zfcp_fc_sg_setup_table(struct scatterlist *sg, int count)
657 {
658 void *addr;
659 int i;
660
661 sg_init_table(sg, count);
662 for (i = 0; i < count; i++, sg = sg_next(sg)) {
663 addr = (void *) get_zeroed_page(GFP_KERNEL);
664 if (!addr) {
665 zfcp_fc_sg_free_table(sg, i);
666 return -ENOMEM;
667 }
668 sg_set_buf(sg, addr, PAGE_SIZE);
669 }
670 return 0;
671 }
672
zfcp_fc_alloc_sg_env(int buf_num)673 static struct zfcp_fc_req *zfcp_fc_alloc_sg_env(int buf_num)
674 {
675 struct zfcp_fc_req *fc_req;
676
677 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
678 if (!fc_req)
679 return NULL;
680
681 if (zfcp_fc_sg_setup_table(&fc_req->sg_rsp, buf_num)) {
682 kmem_cache_free(zfcp_fc_req_cache, fc_req);
683 return NULL;
684 }
685
686 sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req,
687 sizeof(struct zfcp_fc_gpn_ft_req));
688
689 return fc_req;
690 }
691
zfcp_fc_send_gpn_ft(struct zfcp_fc_req * fc_req,struct zfcp_adapter * adapter,int max_bytes)692 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req,
693 struct zfcp_adapter *adapter, int max_bytes)
694 {
695 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
696 struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req;
697 DECLARE_COMPLETION_ONSTACK(completion);
698 int ret;
699
700 zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes);
701 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
702
703 ct_els->handler = zfcp_fc_complete;
704 ct_els->handler_data = &completion;
705 ct_els->req = &fc_req->sg_req;
706 ct_els->resp = &fc_req->sg_rsp;
707
708 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
709 ZFCP_FC_CTELS_TMO);
710 if (!ret)
711 wait_for_completion(&completion);
712 return ret;
713 }
714
zfcp_fc_validate_port(struct zfcp_port * port,struct list_head * lh)715 static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
716 {
717 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
718 return;
719
720 atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status);
721
722 if ((port->supported_classes != 0) ||
723 !list_empty(&port->unit_list))
724 return;
725
726 list_move_tail(&port->list, lh);
727 }
728
zfcp_fc_eval_gpn_ft(struct zfcp_fc_req * fc_req,struct zfcp_adapter * adapter,int max_entries)729 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req,
730 struct zfcp_adapter *adapter, int max_entries)
731 {
732 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
733 struct scatterlist *sg = &fc_req->sg_rsp;
734 struct fc_ct_hdr *hdr = sg_virt(sg);
735 struct fc_gpn_ft_resp *acc = sg_virt(sg);
736 struct zfcp_port *port, *tmp;
737 unsigned long flags;
738 LIST_HEAD(remove_lh);
739 u32 d_id;
740 int ret = 0, x, last = 0;
741
742 if (ct_els->status)
743 return -EIO;
744
745 if (hdr->ct_cmd != cpu_to_be16(FC_FS_ACC)) {
746 if (hdr->ct_reason == FC_FS_RJT_UNABL)
747 return -EAGAIN; /* might be a temporary condition */
748 return -EIO;
749 }
750
751 if (hdr->ct_mr_size) {
752 dev_warn(&adapter->ccw_device->dev,
753 "The name server reported %d words residual data\n",
754 hdr->ct_mr_size);
755 return -E2BIG;
756 }
757
758 /* first entry is the header */
759 for (x = 1; x < max_entries && !last; x++) {
760 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
761 acc++;
762 else
763 acc = sg_virt(++sg);
764
765 last = acc->fp_flags & FC_NS_FID_LAST;
766 d_id = ntoh24(acc->fp_fid);
767
768 /* don't attach ports with a well known address */
769 if (d_id >= FC_FID_WELL_KNOWN_BASE)
770 continue;
771 /* skip the adapter's port and known remote ports */
772 if (be64_to_cpu(acc->fp_wwpn) ==
773 fc_host_port_name(adapter->scsi_host))
774 continue;
775
776 port = zfcp_port_enqueue(adapter, be64_to_cpu(acc->fp_wwpn),
777 ZFCP_STATUS_COMMON_NOESC, d_id);
778 if (!IS_ERR(port))
779 zfcp_erp_port_reopen(port, 0, "fcegpf1");
780 else if (PTR_ERR(port) != -EEXIST)
781 ret = PTR_ERR(port);
782 }
783
784 zfcp_erp_wait(adapter);
785 write_lock_irqsave(&adapter->port_list_lock, flags);
786 list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
787 zfcp_fc_validate_port(port, &remove_lh);
788 write_unlock_irqrestore(&adapter->port_list_lock, flags);
789
790 list_for_each_entry_safe(port, tmp, &remove_lh, list) {
791 zfcp_erp_port_shutdown(port, 0, "fcegpf2");
792 device_unregister(&port->dev);
793 }
794
795 return ret;
796 }
797
798 /**
799 * zfcp_fc_scan_ports - scan remote ports and attach new ports
800 * @work: reference to scheduled work
801 */
zfcp_fc_scan_ports(struct work_struct * work)802 void zfcp_fc_scan_ports(struct work_struct *work)
803 {
804 struct delayed_work *dw = to_delayed_work(work);
805 struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter,
806 scan_work);
807 int ret, i;
808 struct zfcp_fc_req *fc_req;
809 int chain, max_entries, buf_num, max_bytes;
810
811 zfcp_fc_port_scan_time(adapter);
812
813 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
814 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1;
815 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE;
816 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE;
817
818 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
819 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
820 return;
821
822 if (zfcp_fc_wka_port_get(&adapter->gs->ds))
823 return;
824
825 fc_req = zfcp_fc_alloc_sg_env(buf_num);
826 if (!fc_req)
827 goto out;
828
829 for (i = 0; i < 3; i++) {
830 ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes);
831 if (!ret) {
832 ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries);
833 if (ret == -EAGAIN)
834 ssleep(1);
835 else
836 break;
837 }
838 }
839 zfcp_fc_sg_free_table(&fc_req->sg_rsp, buf_num);
840 kmem_cache_free(zfcp_fc_req_cache, fc_req);
841 out:
842 zfcp_fc_wka_port_put(&adapter->gs->ds);
843 }
844
zfcp_fc_gspn(struct zfcp_adapter * adapter,struct zfcp_fc_req * fc_req)845 static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
846 struct zfcp_fc_req *fc_req)
847 {
848 DECLARE_COMPLETION_ONSTACK(completion);
849 char devno[] = "DEVNO:";
850 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
851 struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
852 struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
853 int ret;
854
855 zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
856 FC_SYMBOLIC_NAME_SIZE);
857 hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
858
859 sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
860 sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
861
862 ct_els->handler = zfcp_fc_complete;
863 ct_els->handler_data = &completion;
864 ct_els->req = &fc_req->sg_req;
865 ct_els->resp = &fc_req->sg_rsp;
866
867 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
868 ZFCP_FC_CTELS_TMO);
869 if (ret)
870 return ret;
871
872 wait_for_completion(&completion);
873 if (ct_els->status)
874 return ct_els->status;
875
876 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
877 !(strstr(gspn_rsp->gspn.fp_name, devno)))
878 snprintf(fc_host_symbolic_name(adapter->scsi_host),
879 FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
880 gspn_rsp->gspn.fp_name, devno,
881 dev_name(&adapter->ccw_device->dev),
882 init_utsname()->nodename);
883 else
884 strscpy(fc_host_symbolic_name(adapter->scsi_host),
885 gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
886
887 return 0;
888 }
889
zfcp_fc_rspn(struct zfcp_adapter * adapter,struct zfcp_fc_req * fc_req)890 static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
891 struct zfcp_fc_req *fc_req)
892 {
893 DECLARE_COMPLETION_ONSTACK(completion);
894 struct Scsi_Host *shost = adapter->scsi_host;
895 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
896 struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
897 struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
898 int ret, len;
899
900 zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
901 FC_SYMBOLIC_NAME_SIZE);
902 hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
903
904 BUILD_BUG_ON(sizeof(rspn_req->name) !=
905 sizeof(fc_host_symbolic_name(shost)));
906 BUILD_BUG_ON(sizeof(rspn_req->name) !=
907 type_max(typeof(rspn_req->rspn.fr_name_len)) + 1);
908 len = strscpy(rspn_req->name, fc_host_symbolic_name(shost),
909 sizeof(rspn_req->name));
910 /*
911 * It should be impossible for this to truncate (see BUILD_BUG_ON()
912 * above), but be robust anyway.
913 */
914 if (WARN_ON(len < 0))
915 len = sizeof(rspn_req->name) - 1;
916 rspn_req->rspn.fr_name_len = len;
917
918 sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
919 sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
920
921 ct_els->handler = zfcp_fc_complete;
922 ct_els->handler_data = &completion;
923 ct_els->req = &fc_req->sg_req;
924 ct_els->resp = &fc_req->sg_rsp;
925
926 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
927 ZFCP_FC_CTELS_TMO);
928 if (!ret)
929 wait_for_completion(&completion);
930 }
931
932 /**
933 * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
934 * @work: ns_up_work of the adapter where to update the symbolic port name
935 *
936 * Retrieve the current symbolic port name that may have been set by
937 * the hardware using the GSPN request and update the fc_host
938 * symbolic_name sysfs attribute. When running in NPIV mode (and hence
939 * the port name is unique for this system), update the symbolic port
940 * name to add Linux specific information and update the FC nameserver
941 * using the RSPN request.
942 */
zfcp_fc_sym_name_update(struct work_struct * work)943 void zfcp_fc_sym_name_update(struct work_struct *work)
944 {
945 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
946 ns_up_work);
947 int ret;
948 struct zfcp_fc_req *fc_req;
949
950 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
951 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
952 return;
953
954 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
955 if (!fc_req)
956 return;
957
958 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
959 if (ret)
960 goto out_free;
961
962 ret = zfcp_fc_gspn(adapter, fc_req);
963 if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
964 goto out_ds_put;
965
966 memset(fc_req, 0, sizeof(*fc_req));
967 zfcp_fc_rspn(adapter, fc_req);
968
969 out_ds_put:
970 zfcp_fc_wka_port_put(&adapter->gs->ds);
971 out_free:
972 kmem_cache_free(zfcp_fc_req_cache, fc_req);
973 }
974
zfcp_fc_ct_els_job_handler(void * data)975 static void zfcp_fc_ct_els_job_handler(void *data)
976 {
977 struct bsg_job *job = data;
978 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
979 struct fc_bsg_reply *jr = job->reply;
980
981 jr->reply_payload_rcv_len = job->reply_payload.payload_len;
982 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
983 jr->result = zfcp_ct_els->status ? -EIO : 0;
984 bsg_job_done(job, jr->result, jr->reply_payload_rcv_len);
985 }
986
zfcp_fc_job_wka_port(struct bsg_job * job)987 static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct bsg_job *job)
988 {
989 u32 preamble_word1;
990 u8 gs_type;
991 struct zfcp_adapter *adapter;
992 struct fc_bsg_request *bsg_request = job->request;
993 struct fc_rport *rport = fc_bsg_to_rport(job);
994 struct Scsi_Host *shost;
995
996 preamble_word1 = bsg_request->rqst_data.r_ct.preamble_word1;
997 gs_type = (preamble_word1 & 0xff000000) >> 24;
998
999 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
1000 adapter = (struct zfcp_adapter *) shost->hostdata[0];
1001
1002 switch (gs_type) {
1003 case FC_FST_ALIAS:
1004 return &adapter->gs->as;
1005 case FC_FST_MGMT:
1006 return &adapter->gs->ms;
1007 case FC_FST_TIME:
1008 return &adapter->gs->ts;
1009 break;
1010 case FC_FST_DIR:
1011 return &adapter->gs->ds;
1012 break;
1013 default:
1014 return NULL;
1015 }
1016 }
1017
zfcp_fc_ct_job_handler(void * data)1018 static void zfcp_fc_ct_job_handler(void *data)
1019 {
1020 struct bsg_job *job = data;
1021 struct zfcp_fc_wka_port *wka_port;
1022
1023 wka_port = zfcp_fc_job_wka_port(job);
1024 zfcp_fc_wka_port_put(wka_port);
1025
1026 zfcp_fc_ct_els_job_handler(data);
1027 }
1028
zfcp_fc_exec_els_job(struct bsg_job * job,struct zfcp_adapter * adapter)1029 static int zfcp_fc_exec_els_job(struct bsg_job *job,
1030 struct zfcp_adapter *adapter)
1031 {
1032 struct zfcp_fsf_ct_els *els = job->dd_data;
1033 struct fc_rport *rport = fc_bsg_to_rport(job);
1034 struct fc_bsg_request *bsg_request = job->request;
1035 struct zfcp_port *port;
1036 u32 d_id;
1037
1038 if (rport) {
1039 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
1040 if (!port)
1041 return -EINVAL;
1042
1043 d_id = port->d_id;
1044 put_device(&port->dev);
1045 } else
1046 d_id = ntoh24(bsg_request->rqst_data.h_els.port_id);
1047
1048 els->handler = zfcp_fc_ct_els_job_handler;
1049 return zfcp_fsf_send_els(adapter, d_id, els, job->timeout / HZ);
1050 }
1051
zfcp_fc_exec_ct_job(struct bsg_job * job,struct zfcp_adapter * adapter)1052 static int zfcp_fc_exec_ct_job(struct bsg_job *job,
1053 struct zfcp_adapter *adapter)
1054 {
1055 int ret;
1056 struct zfcp_fsf_ct_els *ct = job->dd_data;
1057 struct zfcp_fc_wka_port *wka_port;
1058
1059 wka_port = zfcp_fc_job_wka_port(job);
1060 if (!wka_port)
1061 return -EINVAL;
1062
1063 ret = zfcp_fc_wka_port_get(wka_port);
1064 if (ret)
1065 return ret;
1066
1067 ct->handler = zfcp_fc_ct_job_handler;
1068 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->timeout / HZ);
1069 if (ret)
1070 zfcp_fc_wka_port_put(wka_port);
1071
1072 return ret;
1073 }
1074
zfcp_fc_exec_bsg_job(struct bsg_job * job)1075 int zfcp_fc_exec_bsg_job(struct bsg_job *job)
1076 {
1077 struct Scsi_Host *shost;
1078 struct zfcp_adapter *adapter;
1079 struct zfcp_fsf_ct_els *ct_els = job->dd_data;
1080 struct fc_bsg_request *bsg_request = job->request;
1081 struct fc_rport *rport = fc_bsg_to_rport(job);
1082
1083 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
1084 adapter = (struct zfcp_adapter *)shost->hostdata[0];
1085
1086 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
1087 return -EINVAL;
1088
1089 ct_els->req = job->request_payload.sg_list;
1090 ct_els->resp = job->reply_payload.sg_list;
1091 ct_els->handler_data = job;
1092
1093 switch (bsg_request->msgcode) {
1094 case FC_BSG_RPT_ELS:
1095 case FC_BSG_HST_ELS_NOLOGIN:
1096 return zfcp_fc_exec_els_job(job, adapter);
1097 case FC_BSG_RPT_CT:
1098 case FC_BSG_HST_CT:
1099 return zfcp_fc_exec_ct_job(job, adapter);
1100 default:
1101 return -EINVAL;
1102 }
1103 }
1104
zfcp_fc_timeout_bsg_job(struct bsg_job * job)1105 int zfcp_fc_timeout_bsg_job(struct bsg_job *job)
1106 {
1107 /* hardware tracks timeout, reset bsg timeout to not interfere */
1108 return -EAGAIN;
1109 }
1110
zfcp_fc_gs_setup(struct zfcp_adapter * adapter)1111 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
1112 {
1113 struct zfcp_fc_wka_ports *wka_ports;
1114
1115 wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL);
1116 if (!wka_ports)
1117 return -ENOMEM;
1118
1119 adapter->gs = wka_ports;
1120 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
1121 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
1122 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
1123 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
1124
1125 return 0;
1126 }
1127
zfcp_fc_gs_destroy(struct zfcp_adapter * adapter)1128 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)
1129 {
1130 kfree(adapter->gs);
1131 adapter->gs = NULL;
1132 }
1133
1134