Commit | Line | Data |
---|---|---|
24073b47 CS |
1 | /* |
2 | * zfcp device driver | |
3 | * | |
4 | * Fibre Channel related functions for the zfcp device driver. | |
5 | * | |
a53c8fab | 6 | * Copyright IBM Corp. 2008, 2010 |
24073b47 CS |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
9d05ce2c | 12 | #include <linux/types.h> |
5a0e3ad6 | 13 | #include <linux/slab.h> |
038d9446 | 14 | #include <linux/utsname.h> |
18f87a67 | 15 | #include <linux/random.h> |
9d05ce2c CS |
16 | #include <scsi/fc/fc_els.h> |
17 | #include <scsi/libfc.h> | |
24073b47 | 18 | #include "zfcp_ext.h" |
9d05ce2c | 19 | #include "zfcp_fc.h" |
24073b47 | 20 | |
087897e3 CS |
21 | struct kmem_cache *zfcp_fc_req_cache; |
22 | ||
9d05ce2c CS |
23 | static u32 zfcp_fc_rscn_range_mask[] = { |
24 | [ELS_ADDR_FMT_PORT] = 0xFFFFFF, | |
25 | [ELS_ADDR_FMT_AREA] = 0xFFFF00, | |
26 | [ELS_ADDR_FMT_DOM] = 0xFF0000, | |
27 | [ELS_ADDR_FMT_FAB] = 0x000000, | |
e0d7fcb5 CS |
28 | }; |
29 | ||
43f60cbd SM |
30 | static bool no_auto_port_rescan; |
31 | module_param_named(no_auto_port_rescan, no_auto_port_rescan, bool, 0600); | |
32 | MODULE_PARM_DESC(no_auto_port_rescan, | |
33 | "no automatic port_rescan (default off)"); | |
34 | ||
18f87a67 MP |
35 | static unsigned int port_scan_backoff = 500; |
36 | module_param(port_scan_backoff, uint, 0600); | |
37 | MODULE_PARM_DESC(port_scan_backoff, | |
38 | "upper limit of port scan random backoff in msecs (default 500)"); | |
39 | ||
40 | static unsigned int port_scan_ratelimit = 60000; | |
41 | module_param(port_scan_ratelimit, uint, 0600); | |
42 | MODULE_PARM_DESC(port_scan_ratelimit, | |
43 | "minimum interval between port scans in msecs (default 60000)"); | |
44 | ||
45 | unsigned int zfcp_fc_port_scan_backoff(void) | |
46 | { | |
47 | if (!port_scan_backoff) | |
48 | return 0; | |
49 | return get_random_int() % port_scan_backoff; | |
50 | } | |
51 | ||
52 | static void zfcp_fc_port_scan_time(struct zfcp_adapter *adapter) | |
53 | { | |
54 | unsigned long interval = msecs_to_jiffies(port_scan_ratelimit); | |
55 | unsigned long backoff = msecs_to_jiffies(zfcp_fc_port_scan_backoff()); | |
56 | ||
57 | adapter->next_port_scan = jiffies + interval + backoff; | |
58 | } | |
59 | ||
60 | static void zfcp_fc_port_scan(struct zfcp_adapter *adapter) | |
61 | { | |
62 | unsigned long now = jiffies; | |
63 | unsigned long next = adapter->next_port_scan; | |
64 | unsigned long delay = 0, max; | |
65 | ||
66 | /* delay only needed within waiting period */ | |
67 | if (time_before(now, next)) { | |
68 | delay = next - now; | |
69 | /* paranoia: never ever delay scans longer than specified */ | |
70 | max = msecs_to_jiffies(port_scan_ratelimit + port_scan_backoff); | |
71 | delay = min(delay, max); | |
72 | } | |
73 | ||
74 | queue_delayed_work(adapter->work_queue, &adapter->scan_work, delay); | |
75 | } | |
76 | ||
43f60cbd SM |
77 | void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter) |
78 | { | |
79 | if (no_auto_port_rescan) | |
80 | return; | |
81 | ||
18f87a67 | 82 | zfcp_fc_port_scan(adapter); |
43f60cbd SM |
83 | } |
84 | ||
85 | void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter) | |
86 | { | |
87 | if (!no_auto_port_rescan) | |
88 | return; | |
89 | ||
18f87a67 | 90 | zfcp_fc_port_scan(adapter); |
43f60cbd SM |
91 | } |
92 | ||
2d1e547f SS |
93 | /** |
94 | * zfcp_fc_post_event - post event to userspace via fc_transport | |
95 | * @work: work struct with enqueued events | |
96 | */ | |
97 | void zfcp_fc_post_event(struct work_struct *work) | |
98 | { | |
99 | struct zfcp_fc_event *event = NULL, *tmp = NULL; | |
100 | LIST_HEAD(tmp_lh); | |
101 | struct zfcp_fc_events *events = container_of(work, | |
102 | struct zfcp_fc_events, work); | |
103 | struct zfcp_adapter *adapter = container_of(events, struct zfcp_adapter, | |
104 | events); | |
105 | ||
106 | spin_lock_bh(&events->list_lock); | |
107 | list_splice_init(&events->list, &tmp_lh); | |
108 | spin_unlock_bh(&events->list_lock); | |
109 | ||
110 | list_for_each_entry_safe(event, tmp, &tmp_lh, list) { | |
111 | fc_host_post_event(adapter->scsi_host, fc_get_event_number(), | |
112 | event->code, event->data); | |
113 | list_del(&event->list); | |
114 | kfree(event); | |
115 | } | |
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 | */ | |
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(sizeof(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 | ||
bd0072ec | 145 | static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
146 | { |
147 | if (mutex_lock_interruptible(&wka_port->mutex)) | |
148 | return -ERESTARTSYS; | |
149 | ||
bd0072ec CS |
150 | if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || |
151 | wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { | |
152 | wka_port->status = ZFCP_FC_WKA_PORT_OPENING; | |
5ab944f9 | 153 | if (zfcp_fsf_open_wka_port(wka_port)) |
bd0072ec | 154 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
155 | } |
156 | ||
157 | mutex_unlock(&wka_port->mutex); | |
158 | ||
27f492cc | 159 | wait_event(wka_port->completion_wq, |
bd0072ec CS |
160 | wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || |
161 | wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); | |
5ab944f9 | 162 | |
bd0072ec | 163 | if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { |
5ab944f9 SS |
164 | atomic_inc(&wka_port->refcount); |
165 | return 0; | |
166 | } | |
167 | return -EIO; | |
168 | } | |
169 | ||
6f53a2d2 | 170 | static void zfcp_fc_wka_port_offline(struct work_struct *work) |
5ab944f9 | 171 | { |
bf6aede7 | 172 | struct delayed_work *dw = to_delayed_work(work); |
bd0072ec CS |
173 | struct zfcp_fc_wka_port *wka_port = |
174 | container_of(dw, struct zfcp_fc_wka_port, work); | |
5ab944f9 | 175 | |
5ab944f9 SS |
176 | mutex_lock(&wka_port->mutex); |
177 | if ((atomic_read(&wka_port->refcount) != 0) || | |
bd0072ec | 178 | (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) |
5ab944f9 SS |
179 | goto out; |
180 | ||
bd0072ec | 181 | wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; |
5ab944f9 | 182 | if (zfcp_fsf_close_wka_port(wka_port)) { |
bd0072ec | 183 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
184 | wake_up(&wka_port->completion_wq); |
185 | } | |
186 | out: | |
187 | mutex_unlock(&wka_port->mutex); | |
188 | } | |
189 | ||
bd0072ec | 190 | static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
191 | { |
192 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
193 | return; | |
19af5cdb | 194 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
195 | schedule_delayed_work(&wka_port->work, HZ / 100); |
196 | } | |
197 | ||
bd0072ec | 198 | static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, |
9d544f2b | 199 | struct zfcp_adapter *adapter) |
5ab944f9 | 200 | { |
5ab944f9 SS |
201 | init_waitqueue_head(&wka_port->completion_wq); |
202 | ||
203 | wka_port->adapter = adapter; | |
9d544f2b | 204 | wka_port->d_id = d_id; |
5ab944f9 | 205 | |
bd0072ec | 206 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
207 | atomic_set(&wka_port->refcount, 0); |
208 | mutex_init(&wka_port->mutex); | |
6f53a2d2 | 209 | INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); |
5ab944f9 SS |
210 | } |
211 | ||
bd0072ec | 212 | static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) |
828bc121 SS |
213 | { |
214 | cancel_delayed_work_sync(&wka->work); | |
215 | mutex_lock(&wka->mutex); | |
bd0072ec | 216 | wka->status = ZFCP_FC_WKA_PORT_OFFLINE; |
828bc121 SS |
217 | mutex_unlock(&wka->mutex); |
218 | } | |
219 | ||
bd0072ec | 220 | void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) |
55c770fa | 221 | { |
f3450c7b SS |
222 | if (!gs) |
223 | return; | |
55c770fa CS |
224 | zfcp_fc_wka_port_force_offline(&gs->ms); |
225 | zfcp_fc_wka_port_force_offline(&gs->ts); | |
226 | zfcp_fc_wka_port_force_offline(&gs->ds); | |
227 | zfcp_fc_wka_port_force_offline(&gs->as); | |
55c770fa CS |
228 | } |
229 | ||
24073b47 | 230 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
9d05ce2c | 231 | struct fc_els_rscn_page *page) |
24073b47 CS |
232 | { |
233 | unsigned long flags; | |
ecf0c772 | 234 | struct zfcp_adapter *adapter = fsf_req->adapter; |
24073b47 CS |
235 | struct zfcp_port *port; |
236 | ||
ecf0c772 SS |
237 | read_lock_irqsave(&adapter->port_list_lock, flags); |
238 | list_for_each_entry(port, &adapter->port_list, list) { | |
9d05ce2c | 239 | if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) |
6f53a2d2 | 240 | zfcp_fc_test_link(port); |
ea460a81 SS |
241 | if (!port->d_id) |
242 | zfcp_erp_port_reopen(port, | |
243 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 244 | "fcrscn1"); |
ea460a81 | 245 | } |
ecf0c772 | 246 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
24073b47 CS |
247 | } |
248 | ||
249 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
250 | { | |
251 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
9d05ce2c CS |
252 | struct fc_els_rscn *head; |
253 | struct fc_els_rscn_page *page; | |
24073b47 CS |
254 | u16 i; |
255 | u16 no_entries; | |
9d05ce2c | 256 | unsigned int afmt; |
24073b47 | 257 | |
9d05ce2c CS |
258 | head = (struct fc_els_rscn *) status_buffer->payload.data; |
259 | page = (struct fc_els_rscn_page *) head; | |
24073b47 CS |
260 | |
261 | /* see FC-FS */ | |
9d05ce2c | 262 | no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); |
24073b47 CS |
263 | |
264 | for (i = 1; i < no_entries; i++) { | |
265 | /* skip head and start with 1st element */ | |
9d05ce2c CS |
266 | page++; |
267 | afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; | |
268 | _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], | |
269 | page); | |
2d1e547f SS |
270 | zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN, |
271 | *(u32 *)page); | |
24073b47 | 272 | } |
43f60cbd | 273 | zfcp_fc_conditional_port_scan(fsf_req->adapter); |
24073b47 CS |
274 | } |
275 | ||
7ba58c9c | 276 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 | 277 | { |
ecf0c772 | 278 | unsigned long flags; |
24073b47 CS |
279 | struct zfcp_adapter *adapter = req->adapter; |
280 | struct zfcp_port *port; | |
24073b47 | 281 | |
ecf0c772 SS |
282 | read_lock_irqsave(&adapter->port_list_lock, flags); |
283 | list_for_each_entry(port, &adapter->port_list, list) | |
284 | if (port->wwpn == wwpn) { | |
ea4a3a6a | 285 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1"); |
24073b47 | 286 | break; |
ecf0c772 SS |
287 | } |
288 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
24073b47 CS |
289 | } |
290 | ||
291 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
292 | { | |
9d05ce2c CS |
293 | struct fsf_status_read_buffer *status_buffer; |
294 | struct fc_els_flogi *plogi; | |
24073b47 | 295 | |
9d05ce2c CS |
296 | status_buffer = (struct fsf_status_read_buffer *) req->data; |
297 | plogi = (struct fc_els_flogi *) status_buffer->payload.data; | |
298 | zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); | |
24073b47 CS |
299 | } |
300 | ||
301 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
302 | { | |
303 | struct fsf_status_read_buffer *status_buffer = | |
304 | (struct fsf_status_read_buffer *)req->data; | |
9d05ce2c CS |
305 | struct fc_els_logo *logo = |
306 | (struct fc_els_logo *) status_buffer->payload.data; | |
24073b47 | 307 | |
9d05ce2c | 308 | zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); |
24073b47 CS |
309 | } |
310 | ||
311 | /** | |
312 | * zfcp_fc_incoming_els - handle incoming ELS | |
313 | * @fsf_req - request which contains incoming ELS | |
314 | */ | |
315 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
316 | { | |
317 | struct fsf_status_read_buffer *status_buffer = | |
318 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 319 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 | 320 | |
2c55b750 | 321 | zfcp_dbf_san_in_els("fciels1", fsf_req); |
9d05ce2c | 322 | if (els_type == ELS_PLOGI) |
24073b47 | 323 | zfcp_fc_incoming_plogi(fsf_req); |
9d05ce2c | 324 | else if (els_type == ELS_LOGO) |
24073b47 | 325 | zfcp_fc_incoming_logo(fsf_req); |
9d05ce2c | 326 | else if (els_type == ELS_RSCN) |
24073b47 CS |
327 | zfcp_fc_incoming_rscn(fsf_req); |
328 | } | |
329 | ||
fcf7e614 | 330 | static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req) |
24073b47 | 331 | { |
fcf7e614 CS |
332 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
333 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
24073b47 | 334 | |
fcf7e614 | 335 | if (ct_els->status) |
5ab944f9 | 336 | return; |
fcf7e614 | 337 | if (gid_pn_rsp->ct_hdr.ct_cmd != FC_FS_ACC) |
5ab944f9 | 338 | return; |
a5b11dda | 339 | |
24073b47 | 340 | /* looks like a valid d_id */ |
fcf7e614 | 341 | ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid); |
24073b47 CS |
342 | } |
343 | ||
7c7dc196 CS |
344 | static void zfcp_fc_complete(void *data) |
345 | { | |
346 | complete(data); | |
347 | } | |
348 | ||
fcf7e614 CS |
349 | static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size) |
350 | { | |
351 | ct_hdr->ct_rev = FC_CT_REV; | |
352 | ct_hdr->ct_fs_type = FC_FST_DIR; | |
353 | ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE; | |
354 | ct_hdr->ct_cmd = cmd; | |
355 | ct_hdr->ct_mr_size = mr_size / 4; | |
356 | } | |
357 | ||
799b76d0 | 358 | static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, |
fcf7e614 | 359 | struct zfcp_fc_req *fc_req) |
24073b47 | 360 | { |
799b76d0 | 361 | struct zfcp_adapter *adapter = port->adapter; |
7c7dc196 | 362 | DECLARE_COMPLETION_ONSTACK(completion); |
fcf7e614 CS |
363 | struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req; |
364 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
5ab944f9 | 365 | int ret; |
24073b47 CS |
366 | |
367 | /* setup parameters for send generic command */ | |
fcf7e614 CS |
368 | fc_req->ct_els.port = port; |
369 | fc_req->ct_els.handler = zfcp_fc_complete; | |
370 | fc_req->ct_els.handler_data = &completion; | |
371 | fc_req->ct_els.req = &fc_req->sg_req; | |
372 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
373 | sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req)); | |
374 | sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp)); | |
375 | ||
376 | zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr, | |
377 | FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE); | |
378 | gid_pn_req->gid_pn.fn_wwpn = port->wwpn; | |
379 | ||
380 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els, | |
51375ee8 SS |
381 | adapter->pool.gid_pn_req, |
382 | ZFCP_FC_CTELS_TMO); | |
7c7dc196 CS |
383 | if (!ret) { |
384 | wait_for_completion(&completion); | |
fcf7e614 | 385 | zfcp_fc_ns_gid_pn_eval(fc_req); |
7c7dc196 | 386 | } |
5ab944f9 SS |
387 | return ret; |
388 | } | |
389 | ||
390 | /** | |
fcf7e614 | 391 | * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request |
799b76d0 | 392 | * @port: port where GID_PN request is needed |
5ab944f9 SS |
393 | * return: -ENOMEM on error, 0 otherwise |
394 | */ | |
799b76d0 | 395 | static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) |
5ab944f9 SS |
396 | { |
397 | int ret; | |
fcf7e614 | 398 | struct zfcp_fc_req *fc_req; |
799b76d0 | 399 | struct zfcp_adapter *adapter = port->adapter; |
5ab944f9 | 400 | |
fcf7e614 CS |
401 | fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); |
402 | if (!fc_req) | |
5ab944f9 SS |
403 | return -ENOMEM; |
404 | ||
fcf7e614 | 405 | memset(fc_req, 0, sizeof(*fc_req)); |
5ab944f9 | 406 | |
6f53a2d2 | 407 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); |
24073b47 | 408 | if (ret) |
5ab944f9 SS |
409 | goto out; |
410 | ||
fcf7e614 | 411 | ret = zfcp_fc_ns_gid_pn_request(port, fc_req); |
5ab944f9 | 412 | |
6f53a2d2 | 413 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
5ab944f9 | 414 | out: |
fcf7e614 | 415 | mempool_free(fc_req, adapter->pool.gid_pn); |
24073b47 CS |
416 | return ret; |
417 | } | |
418 | ||
799b76d0 CS |
419 | void zfcp_fc_port_did_lookup(struct work_struct *work) |
420 | { | |
421 | int ret; | |
422 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
423 | gid_pn_work); | |
424 | ||
425 | ret = zfcp_fc_ns_gid_pn(port); | |
426 | if (ret) { | |
427 | /* could not issue gid_pn for some reason */ | |
ea4a3a6a | 428 | zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1"); |
799b76d0 CS |
429 | goto out; |
430 | } | |
431 | ||
432 | if (!port->d_id) { | |
edaed859 | 433 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
799b76d0 CS |
434 | goto out; |
435 | } | |
436 | ||
ea4a3a6a | 437 | zfcp_erp_port_reopen(port, 0, "fcgpn_3"); |
799b76d0 | 438 | out: |
615f59e0 | 439 | put_device(&port->dev); |
799b76d0 CS |
440 | } |
441 | ||
934aeb58 CS |
442 | /** |
443 | * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request | |
444 | * @port: The zfcp_port to lookup the d_id for. | |
445 | */ | |
446 | void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) | |
447 | { | |
615f59e0 | 448 | get_device(&port->dev); |
934aeb58 | 449 | if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) |
615f59e0 | 450 | put_device(&port->dev); |
934aeb58 CS |
451 | } |
452 | ||
24073b47 CS |
453 | /** |
454 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
455 | * @port: zfcp_port structure | |
456 | * @plogi: plogi payload | |
457 | * | |
458 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
459 | */ | |
9d05ce2c | 460 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) |
24073b47 | 461 | { |
9d05ce2c CS |
462 | if (plogi->fl_wwpn != port->wwpn) { |
463 | port->d_id = 0; | |
464 | dev_warn(&port->adapter->ccw_device->dev, | |
465 | "A port opened with WWPN 0x%016Lx returned data that " | |
466 | "identifies it as WWPN 0x%016Lx\n", | |
467 | (unsigned long long) port->wwpn, | |
468 | (unsigned long long) plogi->fl_wwpn); | |
469 | return; | |
470 | } | |
471 | ||
472 | port->wwnn = plogi->fl_wwnn; | |
473 | port->maxframe_size = plogi->fl_csp.sp_bb_data; | |
474 | ||
475 | if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) | |
24073b47 | 476 | port->supported_classes |= FC_COS_CLASS1; |
9d05ce2c | 477 | if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) |
24073b47 | 478 | port->supported_classes |= FC_COS_CLASS2; |
9d05ce2c | 479 | if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) |
24073b47 | 480 | port->supported_classes |= FC_COS_CLASS3; |
9d05ce2c | 481 | if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) |
24073b47 CS |
482 | port->supported_classes |= FC_COS_CLASS4; |
483 | } | |
484 | ||
7c7dc196 | 485 | static void zfcp_fc_adisc_handler(void *data) |
24073b47 | 486 | { |
087897e3 CS |
487 | struct zfcp_fc_req *fc_req = data; |
488 | struct zfcp_port *port = fc_req->ct_els.port; | |
489 | struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp; | |
24073b47 | 490 | |
087897e3 | 491 | if (fc_req->ct_els.status) { |
24073b47 | 492 | /* request rejected or timed out */ |
5b43e719 | 493 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 494 | "fcadh_1"); |
24073b47 CS |
495 | goto out; |
496 | } | |
497 | ||
498 | if (!port->wwnn) | |
9d05ce2c | 499 | port->wwnn = adisc_resp->adisc_wwnn; |
24073b47 | 500 | |
9d05ce2c | 501 | if ((port->wwpn != adisc_resp->adisc_wwpn) || |
a2fa0aed | 502 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 | 503 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 504 | "fcadh_2"); |
a2fa0aed CS |
505 | goto out; |
506 | } | |
24073b47 | 507 | |
a2fa0aed CS |
508 | /* port is good, unblock rport without going through erp */ |
509 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 | 510 | out: |
805de8f4 | 511 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
615f59e0 | 512 | put_device(&port->dev); |
087897e3 | 513 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
24073b47 CS |
514 | } |
515 | ||
516 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
517 | { | |
087897e3 | 518 | struct zfcp_fc_req *fc_req; |
24073b47 | 519 | struct zfcp_adapter *adapter = port->adapter; |
087897e3 | 520 | struct Scsi_Host *shost = adapter->scsi_host; |
ee744622 | 521 | int ret; |
24073b47 | 522 | |
087897e3 CS |
523 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC); |
524 | if (!fc_req) | |
24073b47 CS |
525 | return -ENOMEM; |
526 | ||
087897e3 CS |
527 | fc_req->ct_els.port = port; |
528 | fc_req->ct_els.req = &fc_req->sg_req; | |
529 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
530 | sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req, | |
9d05ce2c | 531 | sizeof(struct fc_els_adisc)); |
087897e3 | 532 | sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp, |
9d05ce2c | 533 | sizeof(struct fc_els_adisc)); |
24073b47 | 534 | |
087897e3 CS |
535 | fc_req->ct_els.handler = zfcp_fc_adisc_handler; |
536 | fc_req->ct_els.handler_data = fc_req; | |
24073b47 CS |
537 | |
538 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
539 | without FC-AL-2 capability, so we don't set it */ | |
087897e3 CS |
540 | fc_req->u.adisc.req.adisc_wwpn = fc_host_port_name(shost); |
541 | fc_req->u.adisc.req.adisc_wwnn = fc_host_node_name(shost); | |
542 | fc_req->u.adisc.req.adisc_cmd = ELS_ADISC; | |
543 | hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost)); | |
24073b47 | 544 | |
087897e3 | 545 | ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els, |
51375ee8 | 546 | ZFCP_FC_CTELS_TMO); |
ee744622 | 547 | if (ret) |
087897e3 | 548 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
ee744622 CS |
549 | |
550 | return ret; | |
24073b47 CS |
551 | } |
552 | ||
8fdf30d5 | 553 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 554 | { |
8fdf30d5 CS |
555 | struct zfcp_port *port = |
556 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
557 | int retval; |
558 | ||
615f59e0 | 559 | get_device(&port->dev); |
a2fa0aed CS |
560 | port->rport_task = RPORT_DEL; |
561 | zfcp_scsi_rport_work(&port->rport_work); | |
562 | ||
14e242ea CS |
563 | /* only issue one test command at one time per port */ |
564 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) | |
565 | goto out; | |
566 | ||
805de8f4 | 567 | atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
14e242ea | 568 | |
24073b47 | 569 | retval = zfcp_fc_adisc(port); |
9528539c | 570 | if (retval == 0) |
24073b47 CS |
571 | return; |
572 | ||
573 | /* send of ADISC was not possible */ | |
805de8f4 | 574 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
ea4a3a6a | 575 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1"); |
a2fa0aed | 576 | |
14e242ea | 577 | out: |
615f59e0 | 578 | put_device(&port->dev); |
24073b47 | 579 | } |
cc8c2829 | 580 | |
8fdf30d5 | 581 | /** |
6f53a2d2 | 582 | * zfcp_fc_test_link - lightweight link test procedure |
8fdf30d5 CS |
583 | * @port: port to be tested |
584 | * | |
585 | * Test status of a link to a remote port using the ELS command ADISC. | |
586 | * If there is a problem with the remote port, error recovery steps | |
587 | * will be triggered. | |
588 | */ | |
6f53a2d2 | 589 | void zfcp_fc_test_link(struct zfcp_port *port) |
8fdf30d5 | 590 | { |
615f59e0 | 591 | get_device(&port->dev); |
4544683a | 592 | if (!queue_work(port->adapter->work_queue, &port->test_link_work)) |
615f59e0 | 593 | put_device(&port->dev); |
8fdf30d5 CS |
594 | } |
595 | ||
f9773229 | 596 | static struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num) |
cc8c2829 | 597 | { |
f9773229 | 598 | struct zfcp_fc_req *fc_req; |
cc8c2829 | 599 | |
f9773229 CS |
600 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); |
601 | if (!fc_req) | |
cc8c2829 SS |
602 | return NULL; |
603 | ||
f9773229 CS |
604 | if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) { |
605 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
606 | return NULL; | |
cc8c2829 | 607 | } |
cc8c2829 | 608 | |
f9773229 CS |
609 | sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req, |
610 | sizeof(struct zfcp_fc_gpn_ft_req)); | |
cc8c2829 | 611 | |
f9773229 CS |
612 | return fc_req; |
613 | } | |
cc8c2829 | 614 | |
f9773229 | 615 | static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req, |
6f53a2d2 | 616 | struct zfcp_adapter *adapter, int max_bytes) |
cc8c2829 | 617 | { |
f9773229 CS |
618 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
619 | struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req; | |
7c7dc196 | 620 | DECLARE_COMPLETION_ONSTACK(completion); |
cc8c2829 SS |
621 | int ret; |
622 | ||
f9773229 | 623 | zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes); |
dbf5dfe9 | 624 | req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; |
cc8c2829 | 625 | |
f9773229 CS |
626 | ct_els->handler = zfcp_fc_complete; |
627 | ct_els->handler_data = &completion; | |
628 | ct_els->req = &fc_req->sg_req; | |
629 | ct_els->resp = &fc_req->sg_rsp; | |
cc8c2829 | 630 | |
f9773229 | 631 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, |
51375ee8 | 632 | ZFCP_FC_CTELS_TMO); |
cc8c2829 | 633 | if (!ret) |
7c7dc196 | 634 | wait_for_completion(&completion); |
cc8c2829 SS |
635 | return ret; |
636 | } | |
637 | ||
f3450c7b | 638 | static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) |
cc8c2829 | 639 | { |
6ab35c07 MP |
640 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
641 | return; | |
642 | ||
805de8f4 | 643 | atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status); |
cc8c2829 | 644 | |
0406289e | 645 | if ((port->supported_classes != 0) || |
f3450c7b | 646 | !list_empty(&port->unit_list)) |
cc8c2829 | 647 | return; |
f3450c7b | 648 | |
f3450c7b | 649 | list_move_tail(&port->list, lh); |
cc8c2829 SS |
650 | } |
651 | ||
f9773229 | 652 | static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req, |
7c7dc196 | 653 | struct zfcp_adapter *adapter, int max_entries) |
cc8c2829 | 654 | { |
f9773229 CS |
655 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
656 | struct scatterlist *sg = &fc_req->sg_rsp; | |
dbf5dfe9 CS |
657 | struct fc_ct_hdr *hdr = sg_virt(sg); |
658 | struct fc_gpn_ft_resp *acc = sg_virt(sg); | |
cc8c2829 | 659 | struct zfcp_port *port, *tmp; |
ecf0c772 | 660 | unsigned long flags; |
f3450c7b | 661 | LIST_HEAD(remove_lh); |
cc8c2829 | 662 | u32 d_id; |
47f7bba5 | 663 | int ret = 0, x, last = 0; |
cc8c2829 | 664 | |
f9773229 | 665 | if (ct_els->status) |
cc8c2829 SS |
666 | return -EIO; |
667 | ||
dbf5dfe9 CS |
668 | if (hdr->ct_cmd != FC_FS_ACC) { |
669 | if (hdr->ct_reason == FC_BA_RJT_UNABLE) | |
cc8c2829 SS |
670 | return -EAGAIN; /* might be a temporary condition */ |
671 | return -EIO; | |
672 | } | |
673 | ||
dbf5dfe9 | 674 | if (hdr->ct_mr_size) { |
39eb7e9a CS |
675 | dev_warn(&adapter->ccw_device->dev, |
676 | "The name server reported %d words residual data\n", | |
dbf5dfe9 | 677 | hdr->ct_mr_size); |
cc8c2829 | 678 | return -E2BIG; |
39eb7e9a | 679 | } |
cc8c2829 | 680 | |
cc8c2829 | 681 | /* first entry is the header */ |
39eb7e9a | 682 | for (x = 1; x < max_entries && !last; x++) { |
dbf5dfe9 | 683 | if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
cc8c2829 SS |
684 | acc++; |
685 | else | |
686 | acc = sg_virt(++sg); | |
687 | ||
dbf5dfe9 CS |
688 | last = acc->fp_flags & FC_NS_FID_LAST; |
689 | d_id = ntoh24(acc->fp_fid); | |
cc8c2829 | 690 | |
5ab944f9 | 691 | /* don't attach ports with a well known address */ |
dbf5dfe9 | 692 | if (d_id >= FC_FID_WELL_KNOWN_BASE) |
5ab944f9 | 693 | continue; |
cc8c2829 | 694 | /* skip the adapter's port and known remote ports */ |
dbf5dfe9 | 695 | if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) |
cc8c2829 SS |
696 | continue; |
697 | ||
dbf5dfe9 | 698 | port = zfcp_port_enqueue(adapter, acc->fp_wwpn, |
cc8c2829 | 699 | ZFCP_STATUS_COMMON_NOESC, d_id); |
ecf0c772 | 700 | if (!IS_ERR(port)) |
ea4a3a6a | 701 | zfcp_erp_port_reopen(port, 0, "fcegpf1"); |
ecf0c772 SS |
702 | else if (PTR_ERR(port) != -EEXIST) |
703 | ret = PTR_ERR(port); | |
cc8c2829 SS |
704 | } |
705 | ||
706 | zfcp_erp_wait(adapter); | |
ecf0c772 SS |
707 | write_lock_irqsave(&adapter->port_list_lock, flags); |
708 | list_for_each_entry_safe(port, tmp, &adapter->port_list, list) | |
f3450c7b | 709 | zfcp_fc_validate_port(port, &remove_lh); |
ecf0c772 | 710 | write_unlock_irqrestore(&adapter->port_list_lock, flags); |
f3450c7b SS |
711 | |
712 | list_for_each_entry_safe(port, tmp, &remove_lh, list) { | |
ea4a3a6a | 713 | zfcp_erp_port_shutdown(port, 0, "fcegpf2"); |
83d4e1c3 | 714 | device_unregister(&port->dev); |
f3450c7b SS |
715 | } |
716 | ||
cc8c2829 SS |
717 | return ret; |
718 | } | |
719 | ||
720 | /** | |
6f53a2d2 | 721 | * zfcp_fc_scan_ports - scan remote ports and attach new ports |
9eae07ef | 722 | * @work: reference to scheduled work |
cc8c2829 | 723 | */ |
9eae07ef | 724 | void zfcp_fc_scan_ports(struct work_struct *work) |
cc8c2829 | 725 | { |
18f87a67 MP |
726 | struct delayed_work *dw = to_delayed_work(work); |
727 | struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter, | |
9eae07ef | 728 | scan_work); |
cc8c2829 | 729 | int ret, i; |
f9773229 | 730 | struct zfcp_fc_req *fc_req; |
39eb7e9a CS |
731 | int chain, max_entries, buf_num, max_bytes; |
732 | ||
18f87a67 MP |
733 | zfcp_fc_port_scan_time(adapter); |
734 | ||
39eb7e9a | 735 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; |
dbf5dfe9 CS |
736 | buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; |
737 | max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; | |
738 | max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; | |
cc8c2829 | 739 | |
306b6edc SS |
740 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
741 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
9eae07ef | 742 | return; |
cc8c2829 | 743 | |
9eae07ef SS |
744 | if (zfcp_fc_wka_port_get(&adapter->gs->ds)) |
745 | return; | |
cc8c2829 | 746 | |
f9773229 CS |
747 | fc_req = zfcp_alloc_sg_env(buf_num); |
748 | if (!fc_req) | |
5ab944f9 | 749 | goto out; |
cc8c2829 SS |
750 | |
751 | for (i = 0; i < 3; i++) { | |
f9773229 | 752 | ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes); |
cc8c2829 | 753 | if (!ret) { |
f9773229 | 754 | ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries); |
cc8c2829 SS |
755 | if (ret == -EAGAIN) |
756 | ssleep(1); | |
757 | else | |
758 | break; | |
759 | } | |
760 | } | |
f9773229 CS |
761 | zfcp_sg_free_table(&fc_req->sg_rsp, buf_num); |
762 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
5ab944f9 | 763 | out: |
6f53a2d2 | 764 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
cc8c2829 SS |
765 | } |
766 | ||
038d9446 CS |
767 | static int zfcp_fc_gspn(struct zfcp_adapter *adapter, |
768 | struct zfcp_fc_req *fc_req) | |
769 | { | |
770 | DECLARE_COMPLETION_ONSTACK(completion); | |
771 | char devno[] = "DEVNO:"; | |
772 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
773 | struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req; | |
774 | struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp; | |
775 | int ret; | |
776 | ||
777 | zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID, | |
778 | FC_SYMBOLIC_NAME_SIZE); | |
779 | hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host)); | |
780 | ||
781 | sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req)); | |
782 | sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp)); | |
783 | ||
784 | ct_els->handler = zfcp_fc_complete; | |
785 | ct_els->handler_data = &completion; | |
786 | ct_els->req = &fc_req->sg_req; | |
787 | ct_els->resp = &fc_req->sg_rsp; | |
788 | ||
789 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
790 | ZFCP_FC_CTELS_TMO); | |
791 | if (ret) | |
792 | return ret; | |
793 | ||
794 | wait_for_completion(&completion); | |
795 | if (ct_els->status) | |
796 | return ct_els->status; | |
797 | ||
798 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV && | |
799 | !(strstr(gspn_rsp->gspn.fp_name, devno))) | |
800 | snprintf(fc_host_symbolic_name(adapter->scsi_host), | |
801 | FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s", | |
802 | gspn_rsp->gspn.fp_name, devno, | |
803 | dev_name(&adapter->ccw_device->dev), | |
804 | init_utsname()->nodename); | |
805 | else | |
806 | strlcpy(fc_host_symbolic_name(adapter->scsi_host), | |
807 | gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE); | |
808 | ||
809 | return 0; | |
810 | } | |
811 | ||
812 | static void zfcp_fc_rspn(struct zfcp_adapter *adapter, | |
813 | struct zfcp_fc_req *fc_req) | |
814 | { | |
815 | DECLARE_COMPLETION_ONSTACK(completion); | |
816 | struct Scsi_Host *shost = adapter->scsi_host; | |
817 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
818 | struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req; | |
819 | struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp; | |
820 | int ret, len; | |
821 | ||
822 | zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID, | |
823 | FC_SYMBOLIC_NAME_SIZE); | |
824 | hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost)); | |
825 | len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost), | |
826 | FC_SYMBOLIC_NAME_SIZE); | |
827 | rspn_req->rspn.fr_name_len = len; | |
828 | ||
829 | sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req)); | |
830 | sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp)); | |
831 | ||
832 | ct_els->handler = zfcp_fc_complete; | |
833 | ct_els->handler_data = &completion; | |
834 | ct_els->req = &fc_req->sg_req; | |
835 | ct_els->resp = &fc_req->sg_rsp; | |
836 | ||
837 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
838 | ZFCP_FC_CTELS_TMO); | |
839 | if (!ret) | |
840 | wait_for_completion(&completion); | |
841 | } | |
842 | ||
843 | /** | |
844 | * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name | |
845 | * @work: ns_up_work of the adapter where to update the symbolic port name | |
846 | * | |
847 | * Retrieve the current symbolic port name that may have been set by | |
848 | * the hardware using the GSPN request and update the fc_host | |
849 | * symbolic_name sysfs attribute. When running in NPIV mode (and hence | |
850 | * the port name is unique for this system), update the symbolic port | |
851 | * name to add Linux specific information and update the FC nameserver | |
852 | * using the RSPN request. | |
853 | */ | |
854 | void zfcp_fc_sym_name_update(struct work_struct *work) | |
855 | { | |
856 | struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, | |
857 | ns_up_work); | |
858 | int ret; | |
859 | struct zfcp_fc_req *fc_req; | |
860 | ||
861 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && | |
862 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
863 | return; | |
864 | ||
865 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); | |
866 | if (!fc_req) | |
867 | return; | |
868 | ||
869 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); | |
870 | if (ret) | |
871 | goto out_free; | |
872 | ||
873 | ret = zfcp_fc_gspn(adapter, fc_req); | |
874 | if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
875 | goto out_ds_put; | |
876 | ||
877 | memset(fc_req, 0, sizeof(*fc_req)); | |
878 | zfcp_fc_rspn(adapter, fc_req); | |
879 | ||
880 | out_ds_put: | |
881 | zfcp_fc_wka_port_put(&adapter->gs->ds); | |
882 | out_free: | |
883 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
884 | } | |
885 | ||
7c7dc196 | 886 | static void zfcp_fc_ct_els_job_handler(void *data) |
9d544f2b | 887 | { |
7c7dc196 CS |
888 | struct fc_bsg_job *job = data; |
889 | struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; | |
7dec9cf1 | 890 | struct fc_bsg_reply *jr = job->reply; |
9d544f2b | 891 | |
7dec9cf1 SS |
892 | jr->reply_payload_rcv_len = job->reply_payload.payload_len; |
893 | jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; | |
894 | jr->result = zfcp_ct_els->status ? -EIO : 0; | |
9d544f2b | 895 | job->job_done(job); |
9d544f2b SS |
896 | } |
897 | ||
f09d5454 CS |
898 | static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct fc_bsg_job *job) |
899 | { | |
900 | u32 preamble_word1; | |
901 | u8 gs_type; | |
902 | struct zfcp_adapter *adapter; | |
903 | ||
904 | preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; | |
905 | gs_type = (preamble_word1 & 0xff000000) >> 24; | |
906 | ||
907 | adapter = (struct zfcp_adapter *) job->shost->hostdata[0]; | |
908 | ||
909 | switch (gs_type) { | |
910 | case FC_FST_ALIAS: | |
911 | return &adapter->gs->as; | |
912 | case FC_FST_MGMT: | |
913 | return &adapter->gs->ms; | |
914 | case FC_FST_TIME: | |
915 | return &adapter->gs->ts; | |
916 | break; | |
917 | case FC_FST_DIR: | |
918 | return &adapter->gs->ds; | |
919 | break; | |
920 | default: | |
921 | return NULL; | |
922 | } | |
923 | } | |
924 | ||
925 | static void zfcp_fc_ct_job_handler(void *data) | |
926 | { | |
927 | struct fc_bsg_job *job = data; | |
928 | struct zfcp_fc_wka_port *wka_port; | |
929 | ||
930 | wka_port = zfcp_fc_job_wka_port(job); | |
931 | zfcp_fc_wka_port_put(wka_port); | |
932 | ||
933 | zfcp_fc_ct_els_job_handler(data); | |
934 | } | |
935 | ||
7c7dc196 CS |
936 | static int zfcp_fc_exec_els_job(struct fc_bsg_job *job, |
937 | struct zfcp_adapter *adapter) | |
9d544f2b | 938 | { |
7c7dc196 | 939 | struct zfcp_fsf_ct_els *els = job->dd_data; |
9d544f2b | 940 | struct fc_rport *rport = job->rport; |
9d544f2b | 941 | struct zfcp_port *port; |
7c7dc196 | 942 | u32 d_id; |
9d544f2b | 943 | |
9d544f2b | 944 | if (rport) { |
ea945ff8 | 945 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
7c7dc196 | 946 | if (!port) |
9d544f2b | 947 | return -EINVAL; |
ecf0c772 | 948 | |
7c7dc196 | 949 | d_id = port->d_id; |
615f59e0 | 950 | put_device(&port->dev); |
7c7dc196 CS |
951 | } else |
952 | d_id = ntoh24(job->request->rqst_data.h_els.port_id); | |
9d544f2b | 953 | |
f09d5454 | 954 | els->handler = zfcp_fc_ct_els_job_handler; |
51375ee8 | 955 | return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ); |
9d544f2b SS |
956 | } |
957 | ||
7c7dc196 CS |
958 | static int zfcp_fc_exec_ct_job(struct fc_bsg_job *job, |
959 | struct zfcp_adapter *adapter) | |
9d544f2b SS |
960 | { |
961 | int ret; | |
7c7dc196 CS |
962 | struct zfcp_fsf_ct_els *ct = job->dd_data; |
963 | struct zfcp_fc_wka_port *wka_port; | |
9d544f2b | 964 | |
f09d5454 CS |
965 | wka_port = zfcp_fc_job_wka_port(job); |
966 | if (!wka_port) | |
967 | return -EINVAL; | |
9d544f2b | 968 | |
7c7dc196 CS |
969 | ret = zfcp_fc_wka_port_get(wka_port); |
970 | if (ret) | |
9d544f2b | 971 | return ret; |
9d544f2b | 972 | |
f09d5454 | 973 | ct->handler = zfcp_fc_ct_job_handler; |
51375ee8 | 974 | ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ); |
7c7dc196 CS |
975 | if (ret) |
976 | zfcp_fc_wka_port_put(wka_port); | |
9d544f2b | 977 | |
9d544f2b SS |
978 | return ret; |
979 | } | |
d5a282a1 | 980 | |
7c7dc196 CS |
981 | int zfcp_fc_exec_bsg_job(struct fc_bsg_job *job) |
982 | { | |
983 | struct Scsi_Host *shost; | |
984 | struct zfcp_adapter *adapter; | |
985 | struct zfcp_fsf_ct_els *ct_els = job->dd_data; | |
986 | ||
987 | shost = job->rport ? rport_to_shost(job->rport) : job->shost; | |
988 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; | |
989 | ||
990 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
991 | return -EINVAL; | |
992 | ||
993 | ct_els->req = job->request_payload.sg_list; | |
994 | ct_els->resp = job->reply_payload.sg_list; | |
7c7dc196 CS |
995 | ct_els->handler_data = job; |
996 | ||
997 | switch (job->request->msgcode) { | |
998 | case FC_BSG_RPT_ELS: | |
999 | case FC_BSG_HST_ELS_NOLOGIN: | |
1000 | return zfcp_fc_exec_els_job(job, adapter); | |
1001 | case FC_BSG_RPT_CT: | |
1002 | case FC_BSG_HST_CT: | |
1003 | return zfcp_fc_exec_ct_job(job, adapter); | |
1004 | default: | |
1005 | return -EINVAL; | |
1006 | } | |
1007 | } | |
1008 | ||
491ca442 SS |
1009 | int zfcp_fc_timeout_bsg_job(struct fc_bsg_job *job) |
1010 | { | |
1011 | /* hardware tracks timeout, reset bsg timeout to not interfere */ | |
1012 | return -EAGAIN; | |
1013 | } | |
1014 | ||
d5a282a1 SS |
1015 | int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) |
1016 | { | |
bd0072ec | 1017 | struct zfcp_fc_wka_ports *wka_ports; |
d5a282a1 | 1018 | |
bd0072ec | 1019 | wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); |
d5a282a1 SS |
1020 | if (!wka_ports) |
1021 | return -ENOMEM; | |
1022 | ||
1023 | adapter->gs = wka_ports; | |
1024 | zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); | |
1025 | zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); | |
1026 | zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); | |
1027 | zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); | |
d5a282a1 SS |
1028 | |
1029 | return 0; | |
1030 | } | |
1031 | ||
1032 | void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) | |
1033 | { | |
1034 | kfree(adapter->gs); | |
1035 | adapter->gs = NULL; | |
1036 | } | |
1037 |