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 pr_fmt(fmt) "zfcp: " fmt
11
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>
19 #include "zfcp_ext.h"
20 #include "zfcp_fc.h"
21
22 struct kmem_cache *zfcp_fc_req_cache;
23
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,
29 };
30
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)");
35
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)");
40
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)");
45
zfcp_fc_port_scan_backoff(void)46 unsigned int zfcp_fc_port_scan_backoff(void)
47 {
48 if (!port_scan_backoff)
49 return 0;
50 return get_random_u32_below(port_scan_backoff);
51 }
52
zfcp_fc_port_scan_time(struct zfcp_adapter * adapter)53 static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter)
54 {
55 unsigned long interval = msecs_to_jiffies(port_scan_ratelimit);
56 unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff());
57
58 adapter->next_port_scan = jiffies + interval + backoff;
59 }
60
zfcp_fc_port_scan(struct zfcp_adapter * adapter)61 static void zfcp_fc_port_scan(struct zfcp_adapter *adapter)
62 {
63 unsigned long now = jiffies;
64 unsigned long next = adapter->next_port_scan;
65 unsigned long delay = 0, max;
66
67 /* delay only needed within waiting period */
68 if (time_before(now, next)) {
69 delay = next - now;
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);
73 }
74
75 queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay);
76 }
77
zfcp_fc_conditional_port_scan(struct zfcp_adapter * adapter)78 void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter)
79 {
80 if (no_auto_port_rescan)
81 return;
82
83 zfcp_fc_port_scan(adapter);
84 }
85
zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter * adapter)86 void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter)
87 {
88 if (!no_auto_port_rescan)
89 return;
90
91 zfcp_fc_port_scan(adapter);
92 }
93
94 /**
95 * zfcp_fc_post_event - post event to userspace via fc_transport
96 * @work: work struct with enqueued events
97 */
zfcp_fc_post_event(struct work_struct * work)98 void zfcp_fc_post_event(struct work_struct *work)
99 {
100 struct zfcp_fc_event *event = NULL, *tmp = NULL;
101 LIST_HEAD(tmp_lh);
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,
105 events);
106
107 spin_lock_bh(&events->list_lock);
108 list_splice_init(&events->list, &tmp_lh);
109 spin_unlock_bh(&events->list_lock);
110
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);
115 kfree(event);
116 }
117 }
118
119 /**
120 * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context
121 * @adapter: The adapter where to enqueue the event
122 * @event_code: The event code (as defined in fc_host_event_code in
123 * scsi_transport_fc.h)
124 * @event_data: The event data (e.g. n_port page in case of els)
125 */
zfcp_fc_enqueue_event(struct zfcp_adapter * adapter,enum fc_host_event_code event_code,u32 event_data)126 void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter,
127 enum fc_host_event_code event_code, u32 event_data)
128 {
129 struct zfcp_fc_event *event;
130
131 event = kmalloc_obj(struct zfcp_fc_event, GFP_ATOMIC);
132 if (!event)
133 return;
134
135 event->code = event_code;
136 event->data = event_data;
137
138 spin_lock(&adapter->events.list_lock);
139 list_add_tail(&event->list, &adapter->events.list);
140 spin_unlock(&adapter->events.list_lock);
141
142 queue_work(adapter->work_queue, &adapter->events.work);
143 }
144
zfcp_fc_wka_port_get(struct zfcp_fc_wka_port * wka_port)145 static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port)
146 {
147 int ret = -EIO;
148
149 if (mutex_lock_interruptible(&wka_port->mutex))
150 return -ERESTARTSYS;
151
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 /* could not even send request, nothing to wait for */
157 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
158 goto out;
159 }
160 }
161
162 wait_event(wka_port->opened,
163 wka_port->status == ZFCP_FC_WKA_PORT_ONLINE ||
164 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
165
166 if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) {
167 atomic_inc(&wka_port->refcount);
168 ret = 0;
169 goto out;
170 }
171 out:
172 mutex_unlock(&wka_port->mutex);
173 return ret;
174 }
175
zfcp_fc_wka_port_offline(struct work_struct * work)176 static void zfcp_fc_wka_port_offline(struct work_struct *work)
177 {
178 struct delayed_work *dw = to_delayed_work(work);
179 struct zfcp_fc_wka_port *wka_port =
180 container_of(dw, struct zfcp_fc_wka_port, work);
181
182 mutex_lock(&wka_port->mutex);
183 if ((atomic_read(&wka_port->refcount) != 0) ||
184 (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE))
185 goto out;
186
187 wka_port->status = ZFCP_FC_WKA_PORT_CLOSING;
188 if (zfcp_fsf_close_wka_port(wka_port)) {
189 /* could not even send request, nothing to wait for */
190 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
191 goto out;
192 }
193 wait_event(wka_port->closed,
194 wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE);
195 out:
196 mutex_unlock(&wka_port->mutex);
197 }
198
zfcp_fc_wka_port_put(struct zfcp_fc_wka_port * wka_port)199 static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port)
200 {
201 if (atomic_dec_return(&wka_port->refcount) != 0)
202 return;
203 /* wait 10 milliseconds, other reqs might pop in */
204 queue_delayed_work(wka_port->adapter->work_queue, &wka_port->work,
205 msecs_to_jiffies(10));
206 }
207
zfcp_fc_wka_port_init(struct zfcp_fc_wka_port * wka_port,u32 d_id,struct zfcp_adapter * adapter)208 static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id,
209 struct zfcp_adapter *adapter)
210 {
211 init_waitqueue_head(&wka_port->opened);
212 init_waitqueue_head(&wka_port->closed);
213
214 wka_port->adapter = adapter;
215 wka_port->d_id = d_id;
216
217 wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE;
218 atomic_set(&wka_port->refcount, 0);
219 mutex_init(&wka_port->mutex);
220 INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline);
221 }
222
zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port * wka)223 static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka)
224 {
225 cancel_delayed_work_sync(&wka->work);
226 mutex_lock(&wka->mutex);
227 wka->status = ZFCP_FC_WKA_PORT_OFFLINE;
228 mutex_unlock(&wka->mutex);
229 }
230
zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports * gs)231 void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs)
232 {
233 if (!gs)
234 return;
235 zfcp_fc_wka_port_force_offline(&gs->ms);
236 zfcp_fc_wka_port_force_offline(&gs->ts);
237 zfcp_fc_wka_port_force_offline(&gs->ds);
238 zfcp_fc_wka_port_force_offline(&gs->as);
239 }
240
_zfcp_fc_incoming_rscn(struct zfcp_fsf_req * fsf_req,u32 range,struct fc_els_rscn_page * page)241 static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range,
242 struct fc_els_rscn_page *page)
243 {
244 unsigned long flags;
245 struct zfcp_adapter *adapter = fsf_req->adapter;
246 struct zfcp_port *port;
247
248 read_lock_irqsave(&adapter->port_list_lock, flags);
249 list_for_each_entry(port, &adapter->port_list, list) {
250 if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range))
251 zfcp_fc_test_link(port);
252 }
253 read_unlock_irqrestore(&adapter->port_list_lock, flags);
254 }
255
zfcp_fc_incoming_rscn(struct zfcp_fsf_req * fsf_req)256 static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req)
257 {
258 struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data;
259 struct zfcp_adapter *adapter = fsf_req->adapter;
260 struct fc_els_rscn *head;
261 struct fc_els_rscn_page *page;
262 u16 i;
263 u16 no_entries;
264 unsigned int afmt;
265
266 head = (struct fc_els_rscn *) status_buffer->payload.data;
267 page = (struct fc_els_rscn_page *) head;
268
269 /* see FC-FS */
270 no_entries = be16_to_cpu(head->rscn_plen) /
271 sizeof(struct fc_els_rscn_page);
272
273 if (no_entries > 1) {
274 /* handle failed ports */
275 unsigned long flags;
276 struct zfcp_port *port;
277
278 read_lock_irqsave(&adapter->port_list_lock, flags);
279 list_for_each_entry(port, &adapter->port_list, list) {
280 if (port->d_id)
281 continue;
282 zfcp_erp_port_reopen(port,
283 ZFCP_STATUS_COMMON_ERP_FAILED,
284 "fcrscn1");
285 }
286 read_unlock_irqrestore(&adapter->port_list_lock, flags);
287 }
288
289 for (i = 1; i < no_entries; i++) {
290 /* skip head and start with 1st element */
291 page++;
292 afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK;
293 _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt],
294 page);
295 zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN,
296 *(u32 *)page);
297 }
298 zfcp_fc_conditional_port_scan(fsf_req->adapter);
299 }
300
zfcp_fc_incoming_wwpn(struct zfcp_fsf_req * req,u64 wwpn)301 static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn)
302 {
303 unsigned long flags;
304 struct zfcp_adapter *adapter = req->adapter;
305 struct zfcp_port *port;
306
307 read_lock_irqsave(&adapter->port_list_lock, flags);
308 list_for_each_entry(port, &adapter->port_list, list)
309 if (port->wwpn == wwpn) {
310 zfcp_erp_port_forced_reopen(port, 0, "fciwwp1");
311 break;
312 }
313 read_unlock_irqrestore(&adapter->port_list_lock, flags);
314 }
315
zfcp_fc_incoming_plogi(struct zfcp_fsf_req * req)316 static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req)
317 {
318 struct fsf_status_read_buffer *status_buffer;
319 struct fc_els_flogi *plogi;
320
321 status_buffer = (struct fsf_status_read_buffer *) req->data;
322 plogi = (struct fc_els_flogi *) status_buffer->payload.data;
323 zfcp_fc_incoming_wwpn(req, be64_to_cpu(plogi->fl_wwpn));
324 }
325
zfcp_fc_incoming_logo(struct zfcp_fsf_req * req)326 static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req)
327 {
328 struct fsf_status_read_buffer *status_buffer =
329 (struct fsf_status_read_buffer *)req->data;
330 struct fc_els_logo *logo =
331 (struct fc_els_logo *) status_buffer->payload.data;
332
333 zfcp_fc_incoming_wwpn(req, be64_to_cpu(logo->fl_n_port_wwn));
334 }
335
336 /**
337 * zfcp_fc_incoming_els - handle incoming ELS
338 * @fsf_req: request which contains incoming ELS
339 */
zfcp_fc_incoming_els(struct zfcp_fsf_req * fsf_req)340 void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req)
341 {
342 struct fsf_status_read_buffer *status_buffer =
343 (struct fsf_status_read_buffer *) fsf_req->data;
344 unsigned int els_type = status_buffer->payload.data[0];
345
346 zfcp_dbf_san_in_els("fciels1", fsf_req);
347 if (els_type == ELS_PLOGI)
348 zfcp_fc_incoming_plogi(fsf_req);
349 else if (els_type == ELS_LOGO)
350 zfcp_fc_incoming_logo(fsf_req);
351 else if (els_type == ELS_RSCN)
352 zfcp_fc_incoming_rscn(fsf_req);
353 }
354
zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req * fc_req)355 static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req)
356 {
357 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
358 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
359
360 if (ct_els->status)
361 return;
362 if (gid_pn_rsp->ct_hdr.ct_cmd != cpu_to_be16(FC_FS_ACC))
363 return;
364
365 /* looks like a valid d_id */
366 ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid);
367 }
368
zfcp_fc_complete(void * data)369 static void zfcp_fc_complete(void *data)
370 {
371 complete(data);
372 }
373
zfcp_fc_ct_ns_init(struct fc_ct_hdr * ct_hdr,u16 cmd,u16 mr_size)374 static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size)
375 {
376 ct_hdr->ct_rev = FC_CT_REV;
377 ct_hdr->ct_fs_type = FC_FST_DIR;
378 ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE;
379 ct_hdr->ct_cmd = cpu_to_be16(cmd);
380 ct_hdr->ct_mr_size = cpu_to_be16(mr_size / 4);
381 }
382
zfcp_fc_ns_gid_pn_request(struct zfcp_port * port,struct zfcp_fc_req * fc_req)383 static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port,
384 struct zfcp_fc_req *fc_req)
385 {
386 struct zfcp_adapter *adapter = port->adapter;
387 DECLARE_COMPLETION_ONSTACK(completion);
388 struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req;
389 struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp;
390 int ret;
391
392 /* setup parameters for send generic command */
393 fc_req->ct_els.port = port;
394 fc_req->ct_els.handler = zfcp_fc_complete;
395 fc_req->ct_els.handler_data = &completion;
396 fc_req->ct_els.req = &fc_req->sg_req;
397 fc_req->ct_els.resp = &fc_req->sg_rsp;
398 sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req));
399 sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp));
400
401 zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr,
402 FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE);
403 gid_pn_req->gid_pn.fn_wwpn = cpu_to_be64(port->wwpn);
404
405 ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els,
406 adapter->pool.gid_pn_req,
407 ZFCP_FC_CTELS_TMO);
408 if (!ret) {
409 wait_for_completion(&completion);
410 zfcp_fc_ns_gid_pn_eval(fc_req);
411 }
412 return ret;
413 }
414
415 /**
416 * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request
417 * @port: port where GID_PN request is needed
418 * return: -ENOMEM on error, 0 otherwise
419 */
zfcp_fc_ns_gid_pn(struct zfcp_port * port)420 static int zfcp_fc_ns_gid_pn(struct zfcp_port *port)
421 {
422 int ret;
423 struct zfcp_fc_req *fc_req;
424 struct zfcp_adapter *adapter = port->adapter;
425
426 fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC);
427 if (!fc_req)
428 return -ENOMEM;
429
430 memset(fc_req, 0, sizeof(*fc_req));
431
432 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
433 if (ret)
434 goto out;
435
436 ret = zfcp_fc_ns_gid_pn_request(port, fc_req);
437
438 zfcp_fc_wka_port_put(&adapter->gs->ds);
439 out:
440 mempool_free(fc_req, adapter->pool.gid_pn);
441 return ret;
442 }
443
zfcp_fc_port_did_lookup(struct work_struct * work)444 void zfcp_fc_port_did_lookup(struct work_struct *work)
445 {
446 int ret;
447 struct zfcp_port *port = container_of(work, struct zfcp_port,
448 gid_pn_work);
449
450 set_worker_desc("zgidpn%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */
451 ret = zfcp_fc_ns_gid_pn(port);
452 if (ret) {
453 /* could not issue gid_pn for some reason */
454 zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1");
455 goto out;
456 }
457
458 if (!port->d_id) {
459 zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED);
460 goto out;
461 }
462
463 zfcp_erp_port_reopen(port, 0, "fcgpn_3");
464 out:
465 put_device(&port->dev);
466 }
467
468 /**
469 * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request
470 * @port: The zfcp_port to lookup the d_id for.
471 */
zfcp_fc_trigger_did_lookup(struct zfcp_port * port)472 void zfcp_fc_trigger_did_lookup(struct zfcp_port *port)
473 {
474 get_device(&port->dev);
475 if (!queue_work(port->adapter->work_queue, &port->gid_pn_work))
476 put_device(&port->dev);
477 }
478
479 /**
480 * zfcp_fc_plogi_evaluate - evaluate PLOGI playload
481 * @port: zfcp_port structure
482 * @plogi: plogi payload
483 *
484 * Evaluate PLOGI playload and copy important fields into zfcp_port structure
485 */
zfcp_fc_plogi_evaluate(struct zfcp_port * port,struct fc_els_flogi * plogi)486 void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi)
487 {
488 if (be64_to_cpu(plogi->fl_wwpn) != port->wwpn) {
489 port->d_id = 0;
490 dev_warn(&port->adapter->ccw_device->dev,
491 "A port opened with WWPN 0x%016Lx returned data that "
492 "identifies it as WWPN 0x%016Lx\n",
493 (unsigned long long) port->wwpn,
494 (unsigned long long) be64_to_cpu(plogi->fl_wwpn));
495 return;
496 }
497
498 port->wwnn = be64_to_cpu(plogi->fl_wwnn);
499 port->maxframe_size = be16_to_cpu(plogi->fl_csp.sp_bb_data);
500
501 if (plogi->fl_cssp[0].cp_class & cpu_to_be16(FC_CPC_VALID))
502 port->supported_classes |= FC_COS_CLASS1;
503 if (plogi->fl_cssp[1].cp_class & cpu_to_be16(FC_CPC_VALID))
504 port->supported_classes |= FC_COS_CLASS2;
505 if (plogi->fl_cssp[2].cp_class & cpu_to_be16(FC_CPC_VALID))
506 port->supported_classes |= FC_COS_CLASS3;
507 if (plogi->fl_cssp[3].cp_class & cpu_to_be16(FC_CPC_VALID))
508 port->supported_classes |= FC_COS_CLASS4;
509 }
510
zfcp_fc_adisc_handler(void * data)511 static void zfcp_fc_adisc_handler(void *data)
512 {
513 struct zfcp_fc_req *fc_req = data;
514 struct zfcp_port *port = fc_req->ct_els.port;
515 struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp;
516
517 if (fc_req->ct_els.status) {
518 /* request rejected or timed out */
519 zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
520 "fcadh_1");
521 goto out;
522 }
523
524 if (!port->wwnn)
525 port->wwnn = be64_to_cpu(adisc_resp->adisc_wwnn);
526
527 if ((port->wwpn != be64_to_cpu(adisc_resp->adisc_wwpn)) ||
528 !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) {
529 zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED,
530 "fcadh_2");
531 goto out;
532 }
533
534 /* re-init to undo drop from zfcp_fc_adisc() */
535 port->d_id = ntoh24(adisc_resp->adisc_port_id);
536 /* port is still good, nothing to do */
537 out:
538 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
539 /*
540 * port ref comes from get_device() in zfcp_fc_test_link() and
541 * work item zfcp_fc_link_test_work() passes ref via
542 * zfcp_fc_adisc() to here, if zfcp_fc_adisc() could send ADISC
543 */
544 put_device(&port->dev);
545 kmem_cache_free(zfcp_fc_req_cache, fc_req);
546 }
547
zfcp_fc_adisc(struct zfcp_port * port)548 static int zfcp_fc_adisc(struct zfcp_port *port)
549 {
550 struct zfcp_fc_req *fc_req;
551 struct zfcp_adapter *adapter = port->adapter;
552 struct Scsi_Host *shost = adapter->scsi_host;
553 u32 d_id;
554 int ret;
555
556 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC);
557 if (!fc_req)
558 return -ENOMEM;
559
560 fc_req->ct_els.port = port;
561 fc_req->ct_els.req = &fc_req->sg_req;
562 fc_req->ct_els.resp = &fc_req->sg_rsp;
563 sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req,
564 sizeof(struct fc_els_adisc));
565 sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp,
566 sizeof(struct fc_els_adisc));
567
568 fc_req->ct_els.handler = zfcp_fc_adisc_handler;
569 fc_req->ct_els.handler_data = fc_req;
570
571 /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports
572 without FC-AL-2 capability, so we don't set it */
573 fc_req->u.adisc.req.adisc_wwpn = cpu_to_be64(fc_host_port_name(shost));
574 fc_req->u.adisc.req.adisc_wwnn = cpu_to_be64(fc_host_node_name(shost));
575 fc_req->u.adisc.req.adisc_cmd = ELS_ADISC;
576 hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost));
577
578 d_id = port->d_id; /* remember as destination for send els below */
579 /*
580 * Force fresh GID_PN lookup on next port recovery.
581 * Must happen after request setup and before sending request,
582 * to prevent race with port->d_id re-init in zfcp_fc_adisc_handler().
583 */
584 port->d_id = 0;
585
586 ret = zfcp_fsf_send_els(adapter, d_id, &fc_req->ct_els,
587 ZFCP_FC_CTELS_TMO);
588 if (ret)
589 kmem_cache_free(zfcp_fc_req_cache, fc_req);
590
591 return ret;
592 }
593
zfcp_fc_link_test_work(struct work_struct * work)594 void zfcp_fc_link_test_work(struct work_struct *work)
595 {
596 struct zfcp_port *port =
597 container_of(work, struct zfcp_port, test_link_work);
598 int retval;
599
600 set_worker_desc("zadisc%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */
601
602 /* only issue one test command at one time per port */
603 if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST)
604 goto out;
605
606 atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
607
608 retval = zfcp_fc_adisc(port);
609 if (retval == 0)
610 return; /* port ref passed to zfcp_fc_adisc(), no put here */
611
612 /* send of ADISC was not possible */
613 atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status);
614 zfcp_erp_port_forced_reopen(port, 0, "fcltwk1");
615
616 out:
617 put_device(&port->dev);
618 }
619
620 /**
621 * zfcp_fc_test_link - lightweight link test procedure
622 * @port: port to be tested
623 *
624 * Test status of a link to a remote port using the ELS command ADISC.
625 * If there is a problem with the remote port, error recovery steps
626 * will be triggered.
627 */
zfcp_fc_test_link(struct zfcp_port * port)628 void zfcp_fc_test_link(struct zfcp_port *port)
629 {
630 get_device(&port->dev);
631 if (!queue_work(port->adapter->work_queue, &port->test_link_work))
632 put_device(&port->dev);
633 }
634
635 /**
636 * zfcp_fc_sg_free_table - free memory used by scatterlists
637 * @sg: pointer to scatterlist
638 * @count: number of scatterlist which are to be free'ed
639 * the scatterlist are expected to reference pages always
640 */
zfcp_fc_sg_free_table(struct scatterlist * sg,int count)641 static void zfcp_fc_sg_free_table(struct scatterlist *sg, int count)
642 {
643 int i;
644
645 for (i = 0; i < count; i++, sg = sg_next(sg))
646 if (sg)
647 free_page((unsigned long) sg_virt(sg));
648 else
649 break;
650 }
651
652 /**
653 * zfcp_fc_sg_setup_table - init scatterlist and allocate, assign buffers
654 * @sg: pointer to struct scatterlist
655 * @count: number of scatterlists which should be assigned with buffers
656 * of size page
657 *
658 * Returns: 0 on success, -ENOMEM otherwise
659 */
zfcp_fc_sg_setup_table(struct scatterlist * sg,int count)660 static int zfcp_fc_sg_setup_table(struct scatterlist *sg, int count)
661 {
662 void *addr;
663 int i;
664
665 sg_init_table(sg, count);
666 for (i = 0; i < count; i++, sg = sg_next(sg)) {
667 addr = (void *) get_zeroed_page(GFP_KERNEL);
668 if (!addr) {
669 zfcp_fc_sg_free_table(sg, i);
670 return -ENOMEM;
671 }
672 sg_set_buf(sg, addr, PAGE_SIZE);
673 }
674 return 0;
675 }
676
zfcp_fc_alloc_sg_env(int buf_num)677 static struct zfcp_fc_req *zfcp_fc_alloc_sg_env(int buf_num)
678 {
679 struct zfcp_fc_req *fc_req;
680
681 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
682 if (!fc_req)
683 return NULL;
684
685 if (zfcp_fc_sg_setup_table(&fc_req->sg_rsp, buf_num)) {
686 kmem_cache_free(zfcp_fc_req_cache, fc_req);
687 return NULL;
688 }
689
690 sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req,
691 sizeof(struct zfcp_fc_gpn_ft_req));
692
693 return fc_req;
694 }
695
zfcp_fc_send_gpn_ft(struct zfcp_fc_req * fc_req,struct zfcp_adapter * adapter,int max_bytes)696 static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req,
697 struct zfcp_adapter *adapter, int max_bytes)
698 {
699 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
700 struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req;
701 DECLARE_COMPLETION_ONSTACK(completion);
702 int ret;
703
704 zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes);
705 req->gpn_ft.fn_fc4_type = FC_TYPE_FCP;
706
707 ct_els->handler = zfcp_fc_complete;
708 ct_els->handler_data = &completion;
709 ct_els->req = &fc_req->sg_req;
710 ct_els->resp = &fc_req->sg_rsp;
711
712 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
713 ZFCP_FC_CTELS_TMO);
714 if (!ret)
715 wait_for_completion(&completion);
716 return ret;
717 }
718
zfcp_fc_validate_port(struct zfcp_port * port,struct list_head * lh)719 static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh)
720 {
721 if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC))
722 return;
723
724 atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status);
725
726 if ((port->supported_classes != 0) ||
727 !list_empty(&port->unit_list))
728 return;
729
730 list_move_tail(&port->list, lh);
731 }
732
zfcp_fc_eval_gpn_ft(struct zfcp_fc_req * fc_req,struct zfcp_adapter * adapter,int max_entries)733 static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req,
734 struct zfcp_adapter *adapter, int max_entries)
735 {
736 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
737 struct scatterlist *sg = &fc_req->sg_rsp;
738 struct fc_ct_hdr *hdr = sg_virt(sg);
739 struct fc_gpn_ft_resp *acc = sg_virt(sg);
740 struct zfcp_port *port, *tmp;
741 unsigned long flags;
742 LIST_HEAD(remove_lh);
743 u32 d_id;
744 int ret = 0, x, last = 0;
745
746 if (ct_els->status)
747 return -EIO;
748
749 if (hdr->ct_cmd != cpu_to_be16(FC_FS_ACC)) {
750 if (hdr->ct_reason == FC_FS_RJT_UNABL)
751 return -EAGAIN; /* might be a temporary condition */
752 return -EIO;
753 }
754
755 if (hdr->ct_mr_size) {
756 dev_warn(&adapter->ccw_device->dev,
757 "The name server reported %d words residual data\n",
758 hdr->ct_mr_size);
759 return -E2BIG;
760 }
761
762 /* first entry is the header */
763 for (x = 1; x < max_entries && !last; x++) {
764 if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1))
765 acc++;
766 else
767 acc = sg_virt(++sg);
768
769 last = acc->fp_flags & FC_NS_FID_LAST;
770 d_id = ntoh24(acc->fp_fid);
771
772 /* don't attach ports with a well known address */
773 if (d_id >= FC_FID_WELL_KNOWN_BASE)
774 continue;
775 /* skip the adapter's port and known remote ports */
776 if (be64_to_cpu(acc->fp_wwpn) ==
777 fc_host_port_name(adapter->scsi_host))
778 continue;
779
780 port = zfcp_port_enqueue(adapter, be64_to_cpu(acc->fp_wwpn),
781 ZFCP_STATUS_COMMON_NOESC, d_id);
782 if (!IS_ERR(port))
783 zfcp_erp_port_reopen(port, 0, "fcegpf1");
784 else if (PTR_ERR(port) != -EEXIST)
785 ret = PTR_ERR(port);
786 }
787
788 zfcp_erp_wait(adapter);
789 write_lock_irqsave(&adapter->port_list_lock, flags);
790 list_for_each_entry_safe(port, tmp, &adapter->port_list, list)
791 zfcp_fc_validate_port(port, &remove_lh);
792 write_unlock_irqrestore(&adapter->port_list_lock, flags);
793
794 list_for_each_entry_safe(port, tmp, &remove_lh, list) {
795 zfcp_erp_port_shutdown(port, 0, "fcegpf2");
796 device_unregister(&port->dev);
797 }
798
799 return ret;
800 }
801
802 /**
803 * zfcp_fc_scan_ports - scan remote ports and attach new ports
804 * @work: reference to scheduled work
805 */
zfcp_fc_scan_ports(struct work_struct * work)806 void zfcp_fc_scan_ports(struct work_struct *work)
807 {
808 struct delayed_work *dw = to_delayed_work(work);
809 struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter,
810 scan_work);
811 int ret, i;
812 struct zfcp_fc_req *fc_req;
813 int chain, max_entries, buf_num, max_bytes;
814
815 zfcp_fc_port_scan_time(adapter);
816
817 chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS;
818 buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1;
819 max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE;
820 max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE;
821
822 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
823 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
824 return;
825
826 if (zfcp_fc_wka_port_get(&adapter->gs->ds))
827 return;
828
829 fc_req = zfcp_fc_alloc_sg_env(buf_num);
830 if (!fc_req)
831 goto out;
832
833 for (i = 0; i < 3; i++) {
834 ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes);
835 if (!ret) {
836 ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries);
837 if (ret == -EAGAIN)
838 ssleep(1);
839 else
840 break;
841 }
842 }
843 zfcp_fc_sg_free_table(&fc_req->sg_rsp, buf_num);
844 kmem_cache_free(zfcp_fc_req_cache, fc_req);
845 out:
846 zfcp_fc_wka_port_put(&adapter->gs->ds);
847 }
848
zfcp_fc_gspn(struct zfcp_adapter * adapter,struct zfcp_fc_req * fc_req)849 static int zfcp_fc_gspn(struct zfcp_adapter *adapter,
850 struct zfcp_fc_req *fc_req)
851 {
852 DECLARE_COMPLETION_ONSTACK(completion);
853 char devno[] = "DEVNO:";
854 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
855 struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req;
856 struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp;
857 int ret;
858
859 zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID,
860 FC_SYMBOLIC_NAME_SIZE);
861 hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host));
862
863 sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req));
864 sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp));
865
866 ct_els->handler = zfcp_fc_complete;
867 ct_els->handler_data = &completion;
868 ct_els->req = &fc_req->sg_req;
869 ct_els->resp = &fc_req->sg_rsp;
870
871 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
872 ZFCP_FC_CTELS_TMO);
873 if (ret)
874 return ret;
875
876 wait_for_completion(&completion);
877 if (ct_els->status)
878 return ct_els->status;
879
880 if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV &&
881 !(strstr(gspn_rsp->gspn.fp_name, devno)))
882 snprintf(fc_host_symbolic_name(adapter->scsi_host),
883 FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s",
884 gspn_rsp->gspn.fp_name, devno,
885 dev_name(&adapter->ccw_device->dev),
886 init_utsname()->nodename);
887 else
888 strscpy(fc_host_symbolic_name(adapter->scsi_host),
889 gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE);
890
891 return 0;
892 }
893
zfcp_fc_rspn(struct zfcp_adapter * adapter,struct zfcp_fc_req * fc_req)894 static void zfcp_fc_rspn(struct zfcp_adapter *adapter,
895 struct zfcp_fc_req *fc_req)
896 {
897 DECLARE_COMPLETION_ONSTACK(completion);
898 struct Scsi_Host *shost = adapter->scsi_host;
899 struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els;
900 struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req;
901 struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp;
902 int ret, len;
903
904 zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID,
905 FC_SYMBOLIC_NAME_SIZE);
906 hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost));
907
908 BUILD_BUG_ON(sizeof(rspn_req->name) !=
909 sizeof(fc_host_symbolic_name(shost)));
910 BUILD_BUG_ON(sizeof(rspn_req->name) !=
911 type_max(typeof(rspn_req->rspn.fr_name_len)) + 1);
912 len = strscpy(rspn_req->name, fc_host_symbolic_name(shost),
913 sizeof(rspn_req->name));
914 /*
915 * It should be impossible for this to truncate (see BUILD_BUG_ON()
916 * above), but be robust anyway.
917 */
918 if (WARN_ON(len < 0))
919 len = sizeof(rspn_req->name) - 1;
920 rspn_req->rspn.fr_name_len = len;
921
922 sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req));
923 sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp));
924
925 ct_els->handler = zfcp_fc_complete;
926 ct_els->handler_data = &completion;
927 ct_els->req = &fc_req->sg_req;
928 ct_els->resp = &fc_req->sg_rsp;
929
930 ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL,
931 ZFCP_FC_CTELS_TMO);
932 if (!ret)
933 wait_for_completion(&completion);
934 }
935
936 /**
937 * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name
938 * @work: ns_up_work of the adapter where to update the symbolic port name
939 *
940 * Retrieve the current symbolic port name that may have been set by
941 * the hardware using the GSPN request and update the fc_host
942 * symbolic_name sysfs attribute. When running in NPIV mode (and hence
943 * the port name is unique for this system), update the symbolic port
944 * name to add Linux specific information and update the FC nameserver
945 * using the RSPN request.
946 */
zfcp_fc_sym_name_update(struct work_struct * work)947 void zfcp_fc_sym_name_update(struct work_struct *work)
948 {
949 struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter,
950 ns_up_work);
951 int ret;
952 struct zfcp_fc_req *fc_req;
953
954 if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT &&
955 fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
956 return;
957
958 fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL);
959 if (!fc_req)
960 return;
961
962 ret = zfcp_fc_wka_port_get(&adapter->gs->ds);
963 if (ret)
964 goto out_free;
965
966 ret = zfcp_fc_gspn(adapter, fc_req);
967 if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV)
968 goto out_ds_put;
969
970 memset(fc_req, 0, sizeof(*fc_req));
971 zfcp_fc_rspn(adapter, fc_req);
972
973 out_ds_put:
974 zfcp_fc_wka_port_put(&adapter->gs->ds);
975 out_free:
976 kmem_cache_free(zfcp_fc_req_cache, fc_req);
977 }
978
zfcp_fc_ct_els_job_handler(void * data)979 static void zfcp_fc_ct_els_job_handler(void *data)
980 {
981 struct bsg_job *job = data;
982 struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data;
983 struct fc_bsg_reply *jr = job->reply;
984
985 jr->reply_payload_rcv_len = job->reply_payload.payload_len;
986 jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK;
987 jr->result = zfcp_ct_els->status ? -EIO : 0;
988 bsg_job_done(job, jr->result, jr->reply_payload_rcv_len);
989 }
990
zfcp_fc_job_wka_port(struct bsg_job * job)991 static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct bsg_job *job)
992 {
993 u32 preamble_word1;
994 u8 gs_type;
995 struct zfcp_adapter *adapter;
996 struct fc_bsg_request *bsg_request = job->request;
997 struct fc_rport *rport = fc_bsg_to_rport(job);
998 struct Scsi_Host *shost;
999
1000 preamble_word1 = bsg_request->rqst_data.r_ct.preamble_word1;
1001 gs_type = (preamble_word1 & 0xff000000) >> 24;
1002
1003 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
1004 adapter = (struct zfcp_adapter *) shost->hostdata[0];
1005
1006 switch (gs_type) {
1007 case FC_FST_ALIAS:
1008 return &adapter->gs->as;
1009 case FC_FST_MGMT:
1010 return &adapter->gs->ms;
1011 case FC_FST_TIME:
1012 return &adapter->gs->ts;
1013 break;
1014 case FC_FST_DIR:
1015 return &adapter->gs->ds;
1016 break;
1017 default:
1018 return NULL;
1019 }
1020 }
1021
zfcp_fc_ct_job_handler(void * data)1022 static void zfcp_fc_ct_job_handler(void *data)
1023 {
1024 struct bsg_job *job = data;
1025 struct zfcp_fc_wka_port *wka_port;
1026
1027 wka_port = zfcp_fc_job_wka_port(job);
1028 zfcp_fc_wka_port_put(wka_port);
1029
1030 zfcp_fc_ct_els_job_handler(data);
1031 }
1032
zfcp_fc_exec_els_job(struct bsg_job * job,struct zfcp_adapter * adapter)1033 static int zfcp_fc_exec_els_job(struct bsg_job *job,
1034 struct zfcp_adapter *adapter)
1035 {
1036 struct zfcp_fsf_ct_els *els = job->dd_data;
1037 struct fc_rport *rport = fc_bsg_to_rport(job);
1038 struct fc_bsg_request *bsg_request = job->request;
1039 struct zfcp_port *port;
1040 u32 d_id;
1041
1042 if (rport) {
1043 port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
1044 if (!port)
1045 return -EINVAL;
1046
1047 d_id = port->d_id;
1048 put_device(&port->dev);
1049 } else
1050 d_id = ntoh24(bsg_request->rqst_data.h_els.port_id);
1051
1052 els->handler = zfcp_fc_ct_els_job_handler;
1053 return zfcp_fsf_send_els(adapter, d_id, els, job->timeout / HZ);
1054 }
1055
zfcp_fc_exec_ct_job(struct bsg_job * job,struct zfcp_adapter * adapter)1056 static int zfcp_fc_exec_ct_job(struct bsg_job *job,
1057 struct zfcp_adapter *adapter)
1058 {
1059 int ret;
1060 struct zfcp_fsf_ct_els *ct = job->dd_data;
1061 struct zfcp_fc_wka_port *wka_port;
1062
1063 wka_port = zfcp_fc_job_wka_port(job);
1064 if (!wka_port)
1065 return -EINVAL;
1066
1067 ret = zfcp_fc_wka_port_get(wka_port);
1068 if (ret)
1069 return ret;
1070
1071 ct->handler = zfcp_fc_ct_job_handler;
1072 ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->timeout / HZ);
1073 if (ret)
1074 zfcp_fc_wka_port_put(wka_port);
1075
1076 return ret;
1077 }
1078
zfcp_fc_exec_bsg_job(struct bsg_job * job)1079 int zfcp_fc_exec_bsg_job(struct bsg_job *job)
1080 {
1081 struct Scsi_Host *shost;
1082 struct zfcp_adapter *adapter;
1083 struct zfcp_fsf_ct_els *ct_els = job->dd_data;
1084 struct fc_bsg_request *bsg_request = job->request;
1085 struct fc_rport *rport = fc_bsg_to_rport(job);
1086
1087 shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job);
1088 adapter = (struct zfcp_adapter *)shost->hostdata[0];
1089
1090 if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN))
1091 return -EINVAL;
1092
1093 ct_els->req = job->request_payload.sg_list;
1094 ct_els->resp = job->reply_payload.sg_list;
1095 ct_els->handler_data = job;
1096
1097 switch (bsg_request->msgcode) {
1098 case FC_BSG_RPT_ELS:
1099 case FC_BSG_HST_ELS_NOLOGIN:
1100 return zfcp_fc_exec_els_job(job, adapter);
1101 case FC_BSG_RPT_CT:
1102 case FC_BSG_HST_CT:
1103 return zfcp_fc_exec_ct_job(job, adapter);
1104 default:
1105 return -EINVAL;
1106 }
1107 }
1108
zfcp_fc_timeout_bsg_job(struct bsg_job * job)1109 int zfcp_fc_timeout_bsg_job(struct bsg_job *job)
1110 {
1111 /* hardware tracks timeout, reset bsg timeout to not interfere */
1112 return -EAGAIN;
1113 }
1114
zfcp_fc_gs_setup(struct zfcp_adapter * adapter)1115 int zfcp_fc_gs_setup(struct zfcp_adapter *adapter)
1116 {
1117 struct zfcp_fc_wka_ports *wka_ports;
1118
1119 wka_ports = kzalloc_obj(struct zfcp_fc_wka_ports);
1120 if (!wka_ports)
1121 return -ENOMEM;
1122
1123 adapter->gs = wka_ports;
1124 zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter);
1125 zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter);
1126 zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter);
1127 zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter);
1128
1129 return 0;
1130 }
1131
zfcp_fc_gs_destroy(struct zfcp_adapter * adapter)1132 void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter)
1133 {
1134 kfree(adapter->gs);
1135 adapter->gs = NULL;
1136 }
1137
1138