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Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
24073b47 CS |
2 | /* |
3 | * zfcp device driver | |
4 | * | |
5 | * Fibre Channel related functions for the zfcp device driver. | |
6 | * | |
ab8ab4be | 7 | * Copyright IBM Corp. 2008, 2017 |
24073b47 CS |
8 | */ |
9 | ||
ecf39d42 CS |
10 | #define KMSG_COMPONENT "zfcp" |
11 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
12 | ||
9d05ce2c | 13 | #include <linux/types.h> |
5a0e3ad6 | 14 | #include <linux/slab.h> |
038d9446 | 15 | #include <linux/utsname.h> |
18f87a67 | 16 | #include <linux/random.h> |
75cc8cfc | 17 | #include <linux/bsg-lib.h> |
9d05ce2c CS |
18 | #include <scsi/fc/fc_els.h> |
19 | #include <scsi/libfc.h> | |
24073b47 | 20 | #include "zfcp_ext.h" |
9d05ce2c | 21 | #include "zfcp_fc.h" |
24073b47 | 22 | |
087897e3 CS |
23 | struct kmem_cache *zfcp_fc_req_cache; |
24 | ||
9d05ce2c CS |
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, | |
e0d7fcb5 CS |
30 | }; |
31 | ||
43f60cbd | 32 | static bool no_auto_port_rescan; |
b096ef86 | 33 | module_param(no_auto_port_rescan, bool, 0600); |
43f60cbd SM |
34 | MODULE_PARM_DESC(no_auto_port_rescan, |
35 | "no automatic port_rescan (default off)"); | |
36 | ||
18f87a67 MP |
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 | ||
47 | unsigned int zfcp_fc_port_scan_backoff(void) | |
48 | { | |
49 | if (!port_scan_backoff) | |
50 | return 0; | |
51 | return get_random_int() % port_scan_backoff; | |
52 | } | |
53 | ||
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 | ||
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 | ||
43f60cbd SM |
79 | void zfcp_fc_conditional_port_scan(struct zfcp_adapter *adapter) |
80 | { | |
81 | if (no_auto_port_rescan) | |
82 | return; | |
83 | ||
18f87a67 | 84 | zfcp_fc_port_scan(adapter); |
43f60cbd SM |
85 | } |
86 | ||
87 | void zfcp_fc_inverse_conditional_port_scan(struct zfcp_adapter *adapter) | |
88 | { | |
89 | if (!no_auto_port_rescan) | |
90 | return; | |
91 | ||
18f87a67 | 92 | zfcp_fc_port_scan(adapter); |
43f60cbd SM |
93 | } |
94 | ||
2d1e547f SS |
95 | /** |
96 | * zfcp_fc_post_event - post event to userspace via fc_transport | |
97 | * @work: work struct with enqueued events | |
98 | */ | |
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 | /** | |
122 | * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context | |
123 | * @adapter: The adapter where to enqueue the event | |
124 | * @event_code: The event code (as defined in fc_host_event_code in | |
125 | * scsi_transport_fc.h) | |
126 | * @event_data: The event data (e.g. n_port page in case of els) | |
127 | */ | |
128 | void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter, | |
129 | enum fc_host_event_code event_code, u32 event_data) | |
130 | { | |
131 | struct zfcp_fc_event *event; | |
132 | ||
133 | event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC); | |
134 | if (!event) | |
135 | return; | |
136 | ||
137 | event->code = event_code; | |
138 | event->data = event_data; | |
139 | ||
140 | spin_lock(&adapter->events.list_lock); | |
141 | list_add_tail(&event->list, &adapter->events.list); | |
142 | spin_unlock(&adapter->events.list_lock); | |
143 | ||
144 | queue_work(adapter->work_queue, &adapter->events.work); | |
145 | } | |
146 | ||
bd0072ec | 147 | static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
148 | { |
149 | if (mutex_lock_interruptible(&wka_port->mutex)) | |
150 | return -ERESTARTSYS; | |
151 | ||
bd0072ec CS |
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; | |
5ab944f9 | 155 | if (zfcp_fsf_open_wka_port(wka_port)) |
bd0072ec | 156 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
157 | } |
158 | ||
159 | mutex_unlock(&wka_port->mutex); | |
160 | ||
27f492cc | 161 | wait_event(wka_port->completion_wq, |
bd0072ec CS |
162 | wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || |
163 | wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); | |
5ab944f9 | 164 | |
bd0072ec | 165 | if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { |
5ab944f9 SS |
166 | atomic_inc(&wka_port->refcount); |
167 | return 0; | |
168 | } | |
169 | return -EIO; | |
170 | } | |
171 | ||
6f53a2d2 | 172 | static void zfcp_fc_wka_port_offline(struct work_struct *work) |
5ab944f9 | 173 | { |
bf6aede7 | 174 | struct delayed_work *dw = to_delayed_work(work); |
bd0072ec CS |
175 | struct zfcp_fc_wka_port *wka_port = |
176 | container_of(dw, struct zfcp_fc_wka_port, work); | |
5ab944f9 | 177 | |
5ab944f9 SS |
178 | mutex_lock(&wka_port->mutex); |
179 | if ((atomic_read(&wka_port->refcount) != 0) || | |
bd0072ec | 180 | (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) |
5ab944f9 SS |
181 | goto out; |
182 | ||
bd0072ec | 183 | wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; |
5ab944f9 | 184 | if (zfcp_fsf_close_wka_port(wka_port)) { |
bd0072ec | 185 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
186 | wake_up(&wka_port->completion_wq); |
187 | } | |
188 | out: | |
189 | mutex_unlock(&wka_port->mutex); | |
190 | } | |
191 | ||
bd0072ec | 192 | static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
193 | { |
194 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
195 | return; | |
19af5cdb | 196 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
197 | schedule_delayed_work(&wka_port->work, HZ / 100); |
198 | } | |
199 | ||
bd0072ec | 200 | static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, |
9d544f2b | 201 | struct zfcp_adapter *adapter) |
5ab944f9 | 202 | { |
5ab944f9 SS |
203 | init_waitqueue_head(&wka_port->completion_wq); |
204 | ||
205 | wka_port->adapter = adapter; | |
9d544f2b | 206 | wka_port->d_id = d_id; |
5ab944f9 | 207 | |
bd0072ec | 208 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
209 | atomic_set(&wka_port->refcount, 0); |
210 | mutex_init(&wka_port->mutex); | |
6f53a2d2 | 211 | INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); |
5ab944f9 SS |
212 | } |
213 | ||
bd0072ec | 214 | static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) |
828bc121 SS |
215 | { |
216 | cancel_delayed_work_sync(&wka->work); | |
217 | mutex_lock(&wka->mutex); | |
bd0072ec | 218 | wka->status = ZFCP_FC_WKA_PORT_OFFLINE; |
828bc121 SS |
219 | mutex_unlock(&wka->mutex); |
220 | } | |
221 | ||
bd0072ec | 222 | void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) |
55c770fa | 223 | { |
f3450c7b SS |
224 | if (!gs) |
225 | return; | |
55c770fa CS |
226 | zfcp_fc_wka_port_force_offline(&gs->ms); |
227 | zfcp_fc_wka_port_force_offline(&gs->ts); | |
228 | zfcp_fc_wka_port_force_offline(&gs->ds); | |
229 | zfcp_fc_wka_port_force_offline(&gs->as); | |
55c770fa CS |
230 | } |
231 | ||
24073b47 | 232 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
9d05ce2c | 233 | struct fc_els_rscn_page *page) |
24073b47 CS |
234 | { |
235 | unsigned long flags; | |
ecf0c772 | 236 | struct zfcp_adapter *adapter = fsf_req->adapter; |
24073b47 CS |
237 | struct zfcp_port *port; |
238 | ||
ecf0c772 SS |
239 | read_lock_irqsave(&adapter->port_list_lock, flags); |
240 | list_for_each_entry(port, &adapter->port_list, list) { | |
9d05ce2c | 241 | if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) |
6f53a2d2 | 242 | zfcp_fc_test_link(port); |
ea460a81 SS |
243 | if (!port->d_id) |
244 | zfcp_erp_port_reopen(port, | |
245 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
ea4a3a6a | 246 | "fcrscn1"); |
ea460a81 | 247 | } |
ecf0c772 | 248 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
24073b47 CS |
249 | } |
250 | ||
251 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
252 | { | |
253 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
9d05ce2c CS |
254 | struct fc_els_rscn *head; |
255 | struct fc_els_rscn_page *page; | |
24073b47 CS |
256 | u16 i; |
257 | u16 no_entries; | |
9d05ce2c | 258 | unsigned int afmt; |
24073b47 | 259 | |
9d05ce2c CS |
260 | head = (struct fc_els_rscn *) status_buffer->payload.data; |
261 | page = (struct fc_els_rscn_page *) head; | |
24073b47 CS |
262 | |
263 | /* see FC-FS */ | |
9d464fc1 SM |
264 | no_entries = be16_to_cpu(head->rscn_plen) / |
265 | sizeof(struct fc_els_rscn_page); | |
24073b47 CS |
266 | |
267 | for (i = 1; i < no_entries; i++) { | |
268 | /* skip head and start with 1st element */ | |
9d05ce2c CS |
269 | page++; |
270 | afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; | |
271 | _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], | |
272 | page); | |
2d1e547f SS |
273 | zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN, |
274 | *(u32 *)page); | |
24073b47 | 275 | } |
43f60cbd | 276 | zfcp_fc_conditional_port_scan(fsf_req->adapter); |
24073b47 CS |
277 | } |
278 | ||
7ba58c9c | 279 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 | 280 | { |
ecf0c772 | 281 | unsigned long flags; |
24073b47 CS |
282 | struct zfcp_adapter *adapter = req->adapter; |
283 | struct zfcp_port *port; | |
24073b47 | 284 | |
ecf0c772 SS |
285 | read_lock_irqsave(&adapter->port_list_lock, flags); |
286 | list_for_each_entry(port, &adapter->port_list, list) | |
287 | if (port->wwpn == wwpn) { | |
ea4a3a6a | 288 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1"); |
24073b47 | 289 | break; |
ecf0c772 SS |
290 | } |
291 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
24073b47 CS |
292 | } |
293 | ||
294 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
295 | { | |
9d05ce2c CS |
296 | struct fsf_status_read_buffer *status_buffer; |
297 | struct fc_els_flogi *plogi; | |
24073b47 | 298 | |
9d05ce2c CS |
299 | status_buffer = (struct fsf_status_read_buffer *) req->data; |
300 | plogi = (struct fc_els_flogi *) status_buffer->payload.data; | |
9d464fc1 | 301 | zfcp_fc_incoming_wwpn(req, be64_to_cpu(plogi->fl_wwpn)); |
24073b47 CS |
302 | } |
303 | ||
304 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
305 | { | |
306 | struct fsf_status_read_buffer *status_buffer = | |
307 | (struct fsf_status_read_buffer *)req->data; | |
9d05ce2c CS |
308 | struct fc_els_logo *logo = |
309 | (struct fc_els_logo *) status_buffer->payload.data; | |
24073b47 | 310 | |
9d464fc1 | 311 | zfcp_fc_incoming_wwpn(req, be64_to_cpu(logo->fl_n_port_wwn)); |
24073b47 CS |
312 | } |
313 | ||
314 | /** | |
315 | * zfcp_fc_incoming_els - handle incoming ELS | |
316 | * @fsf_req - request which contains incoming ELS | |
317 | */ | |
318 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
319 | { | |
320 | struct fsf_status_read_buffer *status_buffer = | |
321 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 322 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 | 323 | |
2c55b750 | 324 | zfcp_dbf_san_in_els("fciels1", fsf_req); |
9d05ce2c | 325 | if (els_type == ELS_PLOGI) |
24073b47 | 326 | zfcp_fc_incoming_plogi(fsf_req); |
9d05ce2c | 327 | else if (els_type == ELS_LOGO) |
24073b47 | 328 | zfcp_fc_incoming_logo(fsf_req); |
9d05ce2c | 329 | else if (els_type == ELS_RSCN) |
24073b47 CS |
330 | zfcp_fc_incoming_rscn(fsf_req); |
331 | } | |
332 | ||
fcf7e614 | 333 | static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req) |
24073b47 | 334 | { |
fcf7e614 CS |
335 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
336 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
24073b47 | 337 | |
fcf7e614 | 338 | if (ct_els->status) |
5ab944f9 | 339 | return; |
9d464fc1 | 340 | if (gid_pn_rsp->ct_hdr.ct_cmd != cpu_to_be16(FC_FS_ACC)) |
5ab944f9 | 341 | return; |
a5b11dda | 342 | |
24073b47 | 343 | /* looks like a valid d_id */ |
fcf7e614 | 344 | ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid); |
24073b47 CS |
345 | } |
346 | ||
7c7dc196 CS |
347 | static void zfcp_fc_complete(void *data) |
348 | { | |
349 | complete(data); | |
350 | } | |
351 | ||
fcf7e614 CS |
352 | static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size) |
353 | { | |
354 | ct_hdr->ct_rev = FC_CT_REV; | |
355 | ct_hdr->ct_fs_type = FC_FST_DIR; | |
356 | ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE; | |
9d464fc1 SM |
357 | ct_hdr->ct_cmd = cpu_to_be16(cmd); |
358 | ct_hdr->ct_mr_size = cpu_to_be16(mr_size / 4); | |
fcf7e614 CS |
359 | } |
360 | ||
799b76d0 | 361 | static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, |
fcf7e614 | 362 | struct zfcp_fc_req *fc_req) |
24073b47 | 363 | { |
799b76d0 | 364 | struct zfcp_adapter *adapter = port->adapter; |
7c7dc196 | 365 | DECLARE_COMPLETION_ONSTACK(completion); |
fcf7e614 CS |
366 | struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req; |
367 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
5ab944f9 | 368 | int ret; |
24073b47 CS |
369 | |
370 | /* setup parameters for send generic command */ | |
fcf7e614 CS |
371 | fc_req->ct_els.port = port; |
372 | fc_req->ct_els.handler = zfcp_fc_complete; | |
373 | fc_req->ct_els.handler_data = &completion; | |
374 | fc_req->ct_els.req = &fc_req->sg_req; | |
375 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
376 | sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req)); | |
377 | sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp)); | |
378 | ||
379 | zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr, | |
380 | FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE); | |
9d464fc1 | 381 | gid_pn_req->gid_pn.fn_wwpn = cpu_to_be64(port->wwpn); |
fcf7e614 CS |
382 | |
383 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els, | |
51375ee8 SS |
384 | adapter->pool.gid_pn_req, |
385 | ZFCP_FC_CTELS_TMO); | |
7c7dc196 CS |
386 | if (!ret) { |
387 | wait_for_completion(&completion); | |
fcf7e614 | 388 | zfcp_fc_ns_gid_pn_eval(fc_req); |
7c7dc196 | 389 | } |
5ab944f9 SS |
390 | return ret; |
391 | } | |
392 | ||
393 | /** | |
fcf7e614 | 394 | * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request |
799b76d0 | 395 | * @port: port where GID_PN request is needed |
5ab944f9 SS |
396 | * return: -ENOMEM on error, 0 otherwise |
397 | */ | |
799b76d0 | 398 | static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) |
5ab944f9 SS |
399 | { |
400 | int ret; | |
fcf7e614 | 401 | struct zfcp_fc_req *fc_req; |
799b76d0 | 402 | struct zfcp_adapter *adapter = port->adapter; |
5ab944f9 | 403 | |
fcf7e614 CS |
404 | fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); |
405 | if (!fc_req) | |
5ab944f9 SS |
406 | return -ENOMEM; |
407 | ||
fcf7e614 | 408 | memset(fc_req, 0, sizeof(*fc_req)); |
5ab944f9 | 409 | |
6f53a2d2 | 410 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); |
24073b47 | 411 | if (ret) |
5ab944f9 SS |
412 | goto out; |
413 | ||
fcf7e614 | 414 | ret = zfcp_fc_ns_gid_pn_request(port, fc_req); |
5ab944f9 | 415 | |
6f53a2d2 | 416 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
5ab944f9 | 417 | out: |
fcf7e614 | 418 | mempool_free(fc_req, adapter->pool.gid_pn); |
24073b47 CS |
419 | return ret; |
420 | } | |
421 | ||
799b76d0 CS |
422 | void zfcp_fc_port_did_lookup(struct work_struct *work) |
423 | { | |
424 | int ret; | |
425 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
426 | gid_pn_work); | |
427 | ||
428 | ret = zfcp_fc_ns_gid_pn(port); | |
429 | if (ret) { | |
430 | /* could not issue gid_pn for some reason */ | |
ea4a3a6a | 431 | zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1"); |
799b76d0 CS |
432 | goto out; |
433 | } | |
434 | ||
435 | if (!port->d_id) { | |
edaed859 | 436 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
799b76d0 CS |
437 | goto out; |
438 | } | |
439 | ||
ea4a3a6a | 440 | zfcp_erp_port_reopen(port, 0, "fcgpn_3"); |
799b76d0 | 441 | out: |
615f59e0 | 442 | put_device(&port->dev); |
799b76d0 CS |
443 | } |
444 | ||
934aeb58 CS |
445 | /** |
446 | * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request | |
447 | * @port: The zfcp_port to lookup the d_id for. | |
448 | */ | |
449 | void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) | |
450 | { | |
615f59e0 | 451 | get_device(&port->dev); |
934aeb58 | 452 | if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) |
615f59e0 | 453 | put_device(&port->dev); |
934aeb58 CS |
454 | } |
455 | ||
24073b47 CS |
456 | /** |
457 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
458 | * @port: zfcp_port structure | |
459 | * @plogi: plogi payload | |
460 | * | |
461 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
462 | */ | |
9d05ce2c | 463 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) |
24073b47 | 464 | { |
9d464fc1 | 465 | if (be64_to_cpu(plogi->fl_wwpn) != port->wwpn) { |
9d05ce2c CS |
466 | port->d_id = 0; |
467 | dev_warn(&port->adapter->ccw_device->dev, | |
468 | "A port opened with WWPN 0x%016Lx returned data that " | |
469 | "identifies it as WWPN 0x%016Lx\n", | |
470 | (unsigned long long) port->wwpn, | |
9d464fc1 | 471 | (unsigned long long) be64_to_cpu(plogi->fl_wwpn)); |
9d05ce2c CS |
472 | return; |
473 | } | |
474 | ||
9d464fc1 SM |
475 | port->wwnn = be64_to_cpu(plogi->fl_wwnn); |
476 | port->maxframe_size = be16_to_cpu(plogi->fl_csp.sp_bb_data); | |
9d05ce2c | 477 | |
9d464fc1 | 478 | if (plogi->fl_cssp[0].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 479 | port->supported_classes |= FC_COS_CLASS1; |
9d464fc1 | 480 | if (plogi->fl_cssp[1].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 481 | port->supported_classes |= FC_COS_CLASS2; |
9d464fc1 | 482 | if (plogi->fl_cssp[2].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 483 | port->supported_classes |= FC_COS_CLASS3; |
9d464fc1 | 484 | if (plogi->fl_cssp[3].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 CS |
485 | port->supported_classes |= FC_COS_CLASS4; |
486 | } | |
487 | ||
7c7dc196 | 488 | static void zfcp_fc_adisc_handler(void *data) |
24073b47 | 489 | { |
087897e3 CS |
490 | struct zfcp_fc_req *fc_req = data; |
491 | struct zfcp_port *port = fc_req->ct_els.port; | |
492 | struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp; | |
24073b47 | 493 | |
087897e3 | 494 | if (fc_req->ct_els.status) { |
24073b47 | 495 | /* request rejected or timed out */ |
5b43e719 | 496 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 497 | "fcadh_1"); |
24073b47 CS |
498 | goto out; |
499 | } | |
500 | ||
501 | if (!port->wwnn) | |
9d464fc1 | 502 | port->wwnn = be64_to_cpu(adisc_resp->adisc_wwnn); |
24073b47 | 503 | |
9d464fc1 | 504 | if ((port->wwpn != be64_to_cpu(adisc_resp->adisc_wwpn)) || |
a2fa0aed | 505 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 | 506 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 507 | "fcadh_2"); |
a2fa0aed CS |
508 | goto out; |
509 | } | |
24073b47 | 510 | |
a2fa0aed CS |
511 | /* port is good, unblock rport without going through erp */ |
512 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 | 513 | out: |
805de8f4 | 514 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
615f59e0 | 515 | put_device(&port->dev); |
087897e3 | 516 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
24073b47 CS |
517 | } |
518 | ||
519 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
520 | { | |
087897e3 | 521 | struct zfcp_fc_req *fc_req; |
24073b47 | 522 | struct zfcp_adapter *adapter = port->adapter; |
087897e3 | 523 | struct Scsi_Host *shost = adapter->scsi_host; |
ee744622 | 524 | int ret; |
24073b47 | 525 | |
087897e3 CS |
526 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC); |
527 | if (!fc_req) | |
24073b47 CS |
528 | return -ENOMEM; |
529 | ||
087897e3 CS |
530 | fc_req->ct_els.port = port; |
531 | fc_req->ct_els.req = &fc_req->sg_req; | |
532 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
533 | sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req, | |
9d05ce2c | 534 | sizeof(struct fc_els_adisc)); |
087897e3 | 535 | sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp, |
9d05ce2c | 536 | sizeof(struct fc_els_adisc)); |
24073b47 | 537 | |
087897e3 CS |
538 | fc_req->ct_els.handler = zfcp_fc_adisc_handler; |
539 | fc_req->ct_els.handler_data = fc_req; | |
24073b47 CS |
540 | |
541 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
542 | without FC-AL-2 capability, so we don't set it */ | |
9d464fc1 SM |
543 | fc_req->u.adisc.req.adisc_wwpn = cpu_to_be64(fc_host_port_name(shost)); |
544 | fc_req->u.adisc.req.adisc_wwnn = cpu_to_be64(fc_host_node_name(shost)); | |
087897e3 CS |
545 | fc_req->u.adisc.req.adisc_cmd = ELS_ADISC; |
546 | hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost)); | |
24073b47 | 547 | |
087897e3 | 548 | ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els, |
51375ee8 | 549 | ZFCP_FC_CTELS_TMO); |
ee744622 | 550 | if (ret) |
087897e3 | 551 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
ee744622 CS |
552 | |
553 | return ret; | |
24073b47 CS |
554 | } |
555 | ||
8fdf30d5 | 556 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 557 | { |
8fdf30d5 CS |
558 | struct zfcp_port *port = |
559 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
560 | int retval; |
561 | ||
615f59e0 | 562 | get_device(&port->dev); |
a2fa0aed CS |
563 | port->rport_task = RPORT_DEL; |
564 | zfcp_scsi_rport_work(&port->rport_work); | |
565 | ||
14e242ea CS |
566 | /* only issue one test command at one time per port */ |
567 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) | |
568 | goto out; | |
569 | ||
805de8f4 | 570 | atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
14e242ea | 571 | |
24073b47 | 572 | retval = zfcp_fc_adisc(port); |
9528539c | 573 | if (retval == 0) |
24073b47 CS |
574 | return; |
575 | ||
576 | /* send of ADISC was not possible */ | |
805de8f4 | 577 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
ea4a3a6a | 578 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1"); |
a2fa0aed | 579 | |
14e242ea | 580 | out: |
615f59e0 | 581 | put_device(&port->dev); |
24073b47 | 582 | } |
cc8c2829 | 583 | |
8fdf30d5 | 584 | /** |
6f53a2d2 | 585 | * zfcp_fc_test_link - lightweight link test procedure |
8fdf30d5 CS |
586 | * @port: port to be tested |
587 | * | |
588 | * Test status of a link to a remote port using the ELS command ADISC. | |
589 | * If there is a problem with the remote port, error recovery steps | |
590 | * will be triggered. | |
591 | */ | |
6f53a2d2 | 592 | void zfcp_fc_test_link(struct zfcp_port *port) |
8fdf30d5 | 593 | { |
615f59e0 | 594 | get_device(&port->dev); |
4544683a | 595 | if (!queue_work(port->adapter->work_queue, &port->test_link_work)) |
615f59e0 | 596 | put_device(&port->dev); |
8fdf30d5 CS |
597 | } |
598 | ||
f9773229 | 599 | static struct zfcp_fc_req *zfcp_alloc_sg_env(int buf_num) |
cc8c2829 | 600 | { |
f9773229 | 601 | struct zfcp_fc_req *fc_req; |
cc8c2829 | 602 | |
f9773229 CS |
603 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); |
604 | if (!fc_req) | |
cc8c2829 SS |
605 | return NULL; |
606 | ||
f9773229 CS |
607 | if (zfcp_sg_setup_table(&fc_req->sg_rsp, buf_num)) { |
608 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
609 | return NULL; | |
cc8c2829 | 610 | } |
cc8c2829 | 611 | |
f9773229 CS |
612 | sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req, |
613 | sizeof(struct zfcp_fc_gpn_ft_req)); | |
cc8c2829 | 614 | |
f9773229 CS |
615 | return fc_req; |
616 | } | |
cc8c2829 | 617 | |
f9773229 | 618 | static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req, |
6f53a2d2 | 619 | struct zfcp_adapter *adapter, int max_bytes) |
cc8c2829 | 620 | { |
f9773229 CS |
621 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
622 | struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req; | |
7c7dc196 | 623 | DECLARE_COMPLETION_ONSTACK(completion); |
cc8c2829 SS |
624 | int ret; |
625 | ||
f9773229 | 626 | zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes); |
dbf5dfe9 | 627 | req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; |
cc8c2829 | 628 | |
f9773229 CS |
629 | ct_els->handler = zfcp_fc_complete; |
630 | ct_els->handler_data = &completion; | |
631 | ct_els->req = &fc_req->sg_req; | |
632 | ct_els->resp = &fc_req->sg_rsp; | |
cc8c2829 | 633 | |
f9773229 | 634 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, |
51375ee8 | 635 | ZFCP_FC_CTELS_TMO); |
cc8c2829 | 636 | if (!ret) |
7c7dc196 | 637 | wait_for_completion(&completion); |
cc8c2829 SS |
638 | return ret; |
639 | } | |
640 | ||
f3450c7b | 641 | static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) |
cc8c2829 | 642 | { |
6ab35c07 MP |
643 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
644 | return; | |
645 | ||
805de8f4 | 646 | atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status); |
cc8c2829 | 647 | |
0406289e | 648 | if ((port->supported_classes != 0) || |
f3450c7b | 649 | !list_empty(&port->unit_list)) |
cc8c2829 | 650 | return; |
f3450c7b | 651 | |
f3450c7b | 652 | list_move_tail(&port->list, lh); |
cc8c2829 SS |
653 | } |
654 | ||
f9773229 | 655 | static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req, |
7c7dc196 | 656 | struct zfcp_adapter *adapter, int max_entries) |
cc8c2829 | 657 | { |
f9773229 CS |
658 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
659 | struct scatterlist *sg = &fc_req->sg_rsp; | |
dbf5dfe9 CS |
660 | struct fc_ct_hdr *hdr = sg_virt(sg); |
661 | struct fc_gpn_ft_resp *acc = sg_virt(sg); | |
cc8c2829 | 662 | struct zfcp_port *port, *tmp; |
ecf0c772 | 663 | unsigned long flags; |
f3450c7b | 664 | LIST_HEAD(remove_lh); |
cc8c2829 | 665 | u32 d_id; |
47f7bba5 | 666 | int ret = 0, x, last = 0; |
cc8c2829 | 667 | |
f9773229 | 668 | if (ct_els->status) |
cc8c2829 SS |
669 | return -EIO; |
670 | ||
9d464fc1 | 671 | if (hdr->ct_cmd != cpu_to_be16(FC_FS_ACC)) { |
ab8ab4be | 672 | if (hdr->ct_reason == FC_FS_RJT_UNABL) |
cc8c2829 SS |
673 | return -EAGAIN; /* might be a temporary condition */ |
674 | return -EIO; | |
675 | } | |
676 | ||
dbf5dfe9 | 677 | if (hdr->ct_mr_size) { |
39eb7e9a CS |
678 | dev_warn(&adapter->ccw_device->dev, |
679 | "The name server reported %d words residual data\n", | |
dbf5dfe9 | 680 | hdr->ct_mr_size); |
cc8c2829 | 681 | return -E2BIG; |
39eb7e9a | 682 | } |
cc8c2829 | 683 | |
cc8c2829 | 684 | /* first entry is the header */ |
39eb7e9a | 685 | for (x = 1; x < max_entries && !last; x++) { |
dbf5dfe9 | 686 | if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
cc8c2829 SS |
687 | acc++; |
688 | else | |
689 | acc = sg_virt(++sg); | |
690 | ||
dbf5dfe9 CS |
691 | last = acc->fp_flags & FC_NS_FID_LAST; |
692 | d_id = ntoh24(acc->fp_fid); | |
cc8c2829 | 693 | |
5ab944f9 | 694 | /* don't attach ports with a well known address */ |
dbf5dfe9 | 695 | if (d_id >= FC_FID_WELL_KNOWN_BASE) |
5ab944f9 | 696 | continue; |
cc8c2829 | 697 | /* skip the adapter's port and known remote ports */ |
9d464fc1 SM |
698 | if (be64_to_cpu(acc->fp_wwpn) == |
699 | fc_host_port_name(adapter->scsi_host)) | |
cc8c2829 SS |
700 | continue; |
701 | ||
9d464fc1 | 702 | port = zfcp_port_enqueue(adapter, be64_to_cpu(acc->fp_wwpn), |
cc8c2829 | 703 | ZFCP_STATUS_COMMON_NOESC, d_id); |
ecf0c772 | 704 | if (!IS_ERR(port)) |
ea4a3a6a | 705 | zfcp_erp_port_reopen(port, 0, "fcegpf1"); |
ecf0c772 SS |
706 | else if (PTR_ERR(port) != -EEXIST) |
707 | ret = PTR_ERR(port); | |
cc8c2829 SS |
708 | } |
709 | ||
710 | zfcp_erp_wait(adapter); | |
ecf0c772 SS |
711 | write_lock_irqsave(&adapter->port_list_lock, flags); |
712 | list_for_each_entry_safe(port, tmp, &adapter->port_list, list) | |
f3450c7b | 713 | zfcp_fc_validate_port(port, &remove_lh); |
ecf0c772 | 714 | write_unlock_irqrestore(&adapter->port_list_lock, flags); |
f3450c7b SS |
715 | |
716 | list_for_each_entry_safe(port, tmp, &remove_lh, list) { | |
ea4a3a6a | 717 | zfcp_erp_port_shutdown(port, 0, "fcegpf2"); |
83d4e1c3 | 718 | device_unregister(&port->dev); |
f3450c7b SS |
719 | } |
720 | ||
cc8c2829 SS |
721 | return ret; |
722 | } | |
723 | ||
724 | /** | |
6f53a2d2 | 725 | * zfcp_fc_scan_ports - scan remote ports and attach new ports |
9eae07ef | 726 | * @work: reference to scheduled work |
cc8c2829 | 727 | */ |
9eae07ef | 728 | void zfcp_fc_scan_ports(struct work_struct *work) |
cc8c2829 | 729 | { |
18f87a67 MP |
730 | struct delayed_work *dw = to_delayed_work(work); |
731 | struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter, | |
9eae07ef | 732 | scan_work); |
cc8c2829 | 733 | int ret, i; |
f9773229 | 734 | struct zfcp_fc_req *fc_req; |
39eb7e9a CS |
735 | int chain, max_entries, buf_num, max_bytes; |
736 | ||
18f87a67 MP |
737 | zfcp_fc_port_scan_time(adapter); |
738 | ||
39eb7e9a | 739 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; |
dbf5dfe9 CS |
740 | buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; |
741 | max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; | |
742 | max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; | |
cc8c2829 | 743 | |
306b6edc SS |
744 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
745 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
9eae07ef | 746 | return; |
cc8c2829 | 747 | |
9eae07ef SS |
748 | if (zfcp_fc_wka_port_get(&adapter->gs->ds)) |
749 | return; | |
cc8c2829 | 750 | |
f9773229 CS |
751 | fc_req = zfcp_alloc_sg_env(buf_num); |
752 | if (!fc_req) | |
5ab944f9 | 753 | goto out; |
cc8c2829 SS |
754 | |
755 | for (i = 0; i < 3; i++) { | |
f9773229 | 756 | ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes); |
cc8c2829 | 757 | if (!ret) { |
f9773229 | 758 | ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries); |
cc8c2829 SS |
759 | if (ret == -EAGAIN) |
760 | ssleep(1); | |
761 | else | |
762 | break; | |
763 | } | |
764 | } | |
f9773229 CS |
765 | zfcp_sg_free_table(&fc_req->sg_rsp, buf_num); |
766 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
5ab944f9 | 767 | out: |
6f53a2d2 | 768 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
cc8c2829 SS |
769 | } |
770 | ||
038d9446 CS |
771 | static int zfcp_fc_gspn(struct zfcp_adapter *adapter, |
772 | struct zfcp_fc_req *fc_req) | |
773 | { | |
774 | DECLARE_COMPLETION_ONSTACK(completion); | |
775 | char devno[] = "DEVNO:"; | |
776 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
777 | struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req; | |
778 | struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp; | |
779 | int ret; | |
780 | ||
781 | zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID, | |
782 | FC_SYMBOLIC_NAME_SIZE); | |
783 | hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host)); | |
784 | ||
785 | sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req)); | |
786 | sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp)); | |
787 | ||
788 | ct_els->handler = zfcp_fc_complete; | |
789 | ct_els->handler_data = &completion; | |
790 | ct_els->req = &fc_req->sg_req; | |
791 | ct_els->resp = &fc_req->sg_rsp; | |
792 | ||
793 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
794 | ZFCP_FC_CTELS_TMO); | |
795 | if (ret) | |
796 | return ret; | |
797 | ||
798 | wait_for_completion(&completion); | |
799 | if (ct_els->status) | |
800 | return ct_els->status; | |
801 | ||
802 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV && | |
803 | !(strstr(gspn_rsp->gspn.fp_name, devno))) | |
804 | snprintf(fc_host_symbolic_name(adapter->scsi_host), | |
805 | FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s", | |
806 | gspn_rsp->gspn.fp_name, devno, | |
807 | dev_name(&adapter->ccw_device->dev), | |
808 | init_utsname()->nodename); | |
809 | else | |
810 | strlcpy(fc_host_symbolic_name(adapter->scsi_host), | |
811 | gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE); | |
812 | ||
813 | return 0; | |
814 | } | |
815 | ||
816 | static void zfcp_fc_rspn(struct zfcp_adapter *adapter, | |
817 | struct zfcp_fc_req *fc_req) | |
818 | { | |
819 | DECLARE_COMPLETION_ONSTACK(completion); | |
820 | struct Scsi_Host *shost = adapter->scsi_host; | |
821 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
822 | struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req; | |
823 | struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp; | |
824 | int ret, len; | |
825 | ||
826 | zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID, | |
827 | FC_SYMBOLIC_NAME_SIZE); | |
828 | hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost)); | |
829 | len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost), | |
830 | FC_SYMBOLIC_NAME_SIZE); | |
831 | rspn_req->rspn.fr_name_len = len; | |
832 | ||
833 | sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req)); | |
834 | sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp)); | |
835 | ||
836 | ct_els->handler = zfcp_fc_complete; | |
837 | ct_els->handler_data = &completion; | |
838 | ct_els->req = &fc_req->sg_req; | |
839 | ct_els->resp = &fc_req->sg_rsp; | |
840 | ||
841 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
842 | ZFCP_FC_CTELS_TMO); | |
843 | if (!ret) | |
844 | wait_for_completion(&completion); | |
845 | } | |
846 | ||
847 | /** | |
848 | * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name | |
849 | * @work: ns_up_work of the adapter where to update the symbolic port name | |
850 | * | |
851 | * Retrieve the current symbolic port name that may have been set by | |
852 | * the hardware using the GSPN request and update the fc_host | |
853 | * symbolic_name sysfs attribute. When running in NPIV mode (and hence | |
854 | * the port name is unique for this system), update the symbolic port | |
855 | * name to add Linux specific information and update the FC nameserver | |
856 | * using the RSPN request. | |
857 | */ | |
858 | void zfcp_fc_sym_name_update(struct work_struct *work) | |
859 | { | |
860 | struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, | |
861 | ns_up_work); | |
862 | int ret; | |
863 | struct zfcp_fc_req *fc_req; | |
864 | ||
865 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && | |
866 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
867 | return; | |
868 | ||
869 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); | |
870 | if (!fc_req) | |
871 | return; | |
872 | ||
873 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); | |
874 | if (ret) | |
875 | goto out_free; | |
876 | ||
877 | ret = zfcp_fc_gspn(adapter, fc_req); | |
878 | if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
879 | goto out_ds_put; | |
880 | ||
881 | memset(fc_req, 0, sizeof(*fc_req)); | |
882 | zfcp_fc_rspn(adapter, fc_req); | |
883 | ||
884 | out_ds_put: | |
885 | zfcp_fc_wka_port_put(&adapter->gs->ds); | |
886 | out_free: | |
887 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
888 | } | |
889 | ||
7c7dc196 | 890 | static void zfcp_fc_ct_els_job_handler(void *data) |
9d544f2b | 891 | { |
75cc8cfc | 892 | struct bsg_job *job = data; |
7c7dc196 | 893 | struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; |
7dec9cf1 | 894 | struct fc_bsg_reply *jr = job->reply; |
9d544f2b | 895 | |
7dec9cf1 SS |
896 | jr->reply_payload_rcv_len = job->reply_payload.payload_len; |
897 | jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; | |
898 | jr->result = zfcp_ct_els->status ? -EIO : 0; | |
06548160 | 899 | bsg_job_done(job, jr->result, jr->reply_payload_rcv_len); |
9d544f2b SS |
900 | } |
901 | ||
75cc8cfc | 902 | static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct bsg_job *job) |
f09d5454 CS |
903 | { |
904 | u32 preamble_word1; | |
905 | u8 gs_type; | |
906 | struct zfcp_adapter *adapter; | |
01e0e15c | 907 | struct fc_bsg_request *bsg_request = job->request; |
1d69b122 | 908 | struct fc_rport *rport = fc_bsg_to_rport(job); |
cd21c605 | 909 | struct Scsi_Host *shost; |
f09d5454 | 910 | |
01e0e15c | 911 | preamble_word1 = bsg_request->rqst_data.r_ct.preamble_word1; |
f09d5454 CS |
912 | gs_type = (preamble_word1 & 0xff000000) >> 24; |
913 | ||
1d69b122 | 914 | shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job); |
cd21c605 | 915 | adapter = (struct zfcp_adapter *) shost->hostdata[0]; |
f09d5454 CS |
916 | |
917 | switch (gs_type) { | |
918 | case FC_FST_ALIAS: | |
919 | return &adapter->gs->as; | |
920 | case FC_FST_MGMT: | |
921 | return &adapter->gs->ms; | |
922 | case FC_FST_TIME: | |
923 | return &adapter->gs->ts; | |
924 | break; | |
925 | case FC_FST_DIR: | |
926 | return &adapter->gs->ds; | |
927 | break; | |
928 | default: | |
929 | return NULL; | |
930 | } | |
931 | } | |
932 | ||
933 | static void zfcp_fc_ct_job_handler(void *data) | |
934 | { | |
75cc8cfc | 935 | struct bsg_job *job = data; |
f09d5454 CS |
936 | struct zfcp_fc_wka_port *wka_port; |
937 | ||
938 | wka_port = zfcp_fc_job_wka_port(job); | |
939 | zfcp_fc_wka_port_put(wka_port); | |
940 | ||
941 | zfcp_fc_ct_els_job_handler(data); | |
942 | } | |
943 | ||
75cc8cfc | 944 | static int zfcp_fc_exec_els_job(struct bsg_job *job, |
7c7dc196 | 945 | struct zfcp_adapter *adapter) |
9d544f2b | 946 | { |
7c7dc196 | 947 | struct zfcp_fsf_ct_els *els = job->dd_data; |
1d69b122 | 948 | struct fc_rport *rport = fc_bsg_to_rport(job); |
01e0e15c | 949 | struct fc_bsg_request *bsg_request = job->request; |
9d544f2b | 950 | struct zfcp_port *port; |
7c7dc196 | 951 | u32 d_id; |
9d544f2b | 952 | |
9d544f2b | 953 | if (rport) { |
ea945ff8 | 954 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
7c7dc196 | 955 | if (!port) |
9d544f2b | 956 | return -EINVAL; |
ecf0c772 | 957 | |
7c7dc196 | 958 | d_id = port->d_id; |
615f59e0 | 959 | put_device(&port->dev); |
7c7dc196 | 960 | } else |
01e0e15c | 961 | d_id = ntoh24(bsg_request->rqst_data.h_els.port_id); |
9d544f2b | 962 | |
f09d5454 | 963 | els->handler = zfcp_fc_ct_els_job_handler; |
51375ee8 | 964 | return zfcp_fsf_send_els(adapter, d_id, els, job->req->timeout / HZ); |
9d544f2b SS |
965 | } |
966 | ||
75cc8cfc | 967 | static int zfcp_fc_exec_ct_job(struct bsg_job *job, |
7c7dc196 | 968 | struct zfcp_adapter *adapter) |
9d544f2b SS |
969 | { |
970 | int ret; | |
7c7dc196 CS |
971 | struct zfcp_fsf_ct_els *ct = job->dd_data; |
972 | struct zfcp_fc_wka_port *wka_port; | |
9d544f2b | 973 | |
f09d5454 CS |
974 | wka_port = zfcp_fc_job_wka_port(job); |
975 | if (!wka_port) | |
976 | return -EINVAL; | |
9d544f2b | 977 | |
7c7dc196 CS |
978 | ret = zfcp_fc_wka_port_get(wka_port); |
979 | if (ret) | |
9d544f2b | 980 | return ret; |
9d544f2b | 981 | |
f09d5454 | 982 | ct->handler = zfcp_fc_ct_job_handler; |
51375ee8 | 983 | ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->req->timeout / HZ); |
7c7dc196 CS |
984 | if (ret) |
985 | zfcp_fc_wka_port_put(wka_port); | |
9d544f2b | 986 | |
9d544f2b SS |
987 | return ret; |
988 | } | |
d5a282a1 | 989 | |
75cc8cfc | 990 | int zfcp_fc_exec_bsg_job(struct bsg_job *job) |
7c7dc196 CS |
991 | { |
992 | struct Scsi_Host *shost; | |
993 | struct zfcp_adapter *adapter; | |
994 | struct zfcp_fsf_ct_els *ct_els = job->dd_data; | |
01e0e15c | 995 | struct fc_bsg_request *bsg_request = job->request; |
1d69b122 | 996 | struct fc_rport *rport = fc_bsg_to_rport(job); |
7c7dc196 | 997 | |
1d69b122 | 998 | shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job); |
7c7dc196 CS |
999 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
1000 | ||
1001 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
1002 | return -EINVAL; | |
1003 | ||
1004 | ct_els->req = job->request_payload.sg_list; | |
1005 | ct_els->resp = job->reply_payload.sg_list; | |
7c7dc196 CS |
1006 | ct_els->handler_data = job; |
1007 | ||
01e0e15c | 1008 | switch (bsg_request->msgcode) { |
7c7dc196 CS |
1009 | case FC_BSG_RPT_ELS: |
1010 | case FC_BSG_HST_ELS_NOLOGIN: | |
1011 | return zfcp_fc_exec_els_job(job, adapter); | |
1012 | case FC_BSG_RPT_CT: | |
1013 | case FC_BSG_HST_CT: | |
1014 | return zfcp_fc_exec_ct_job(job, adapter); | |
1015 | default: | |
1016 | return -EINVAL; | |
1017 | } | |
1018 | } | |
1019 | ||
75cc8cfc | 1020 | int zfcp_fc_timeout_bsg_job(struct bsg_job *job) |
491ca442 SS |
1021 | { |
1022 | /* hardware tracks timeout, reset bsg timeout to not interfere */ | |
1023 | return -EAGAIN; | |
1024 | } | |
1025 | ||
d5a282a1 SS |
1026 | int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) |
1027 | { | |
bd0072ec | 1028 | struct zfcp_fc_wka_ports *wka_ports; |
d5a282a1 | 1029 | |
bd0072ec | 1030 | wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); |
d5a282a1 SS |
1031 | if (!wka_ports) |
1032 | return -ENOMEM; | |
1033 | ||
1034 | adapter->gs = wka_ports; | |
1035 | zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); | |
1036 | zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); | |
1037 | zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); | |
1038 | zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); | |
d5a282a1 SS |
1039 | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) | |
1044 | { | |
1045 | kfree(adapter->gs); | |
1046 | adapter->gs = NULL; | |
1047 | } | |
1048 |