Commit | Line | Data |
---|---|---|
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(), | |
6919298c | 114 | event->code, event->data); |
2d1e547f SS |
115 | list_del(&event->list); |
116 | kfree(event); | |
117 | } | |
2d1e547f SS |
118 | } |
119 | ||
120 | /** | |
121 | * zfcp_fc_enqueue_event - safely enqueue FC HBA API event from irq context | |
122 | * @adapter: The adapter where to enqueue the event | |
123 | * @event_code: The event code (as defined in fc_host_event_code in | |
124 | * scsi_transport_fc.h) | |
125 | * @event_data: The event data (e.g. n_port page in case of els) | |
126 | */ | |
127 | void zfcp_fc_enqueue_event(struct zfcp_adapter *adapter, | |
6919298c | 128 | enum fc_host_event_code event_code, u32 event_data) |
2d1e547f SS |
129 | { |
130 | struct zfcp_fc_event *event; | |
131 | ||
132 | event = kmalloc(sizeof(struct zfcp_fc_event), GFP_ATOMIC); | |
133 | if (!event) | |
134 | return; | |
135 | ||
136 | event->code = event_code; | |
137 | event->data = event_data; | |
138 | ||
139 | spin_lock(&adapter->events.list_lock); | |
140 | list_add_tail(&event->list, &adapter->events.list); | |
141 | spin_unlock(&adapter->events.list_lock); | |
142 | ||
143 | queue_work(adapter->work_queue, &adapter->events.work); | |
144 | } | |
145 | ||
bd0072ec | 146 | static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
147 | { |
148 | if (mutex_lock_interruptible(&wka_port->mutex)) | |
149 | return -ERESTARTSYS; | |
150 | ||
bd0072ec CS |
151 | if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || |
152 | wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { | |
153 | wka_port->status = ZFCP_FC_WKA_PORT_OPENING; | |
5ab944f9 | 154 | if (zfcp_fsf_open_wka_port(wka_port)) |
bd0072ec | 155 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
156 | } |
157 | ||
158 | mutex_unlock(&wka_port->mutex); | |
159 | ||
27f492cc | 160 | wait_event(wka_port->completion_wq, |
bd0072ec CS |
161 | wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || |
162 | wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); | |
5ab944f9 | 163 | |
bd0072ec | 164 | if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { |
5ab944f9 SS |
165 | atomic_inc(&wka_port->refcount); |
166 | return 0; | |
167 | } | |
168 | return -EIO; | |
169 | } | |
170 | ||
6f53a2d2 | 171 | static void zfcp_fc_wka_port_offline(struct work_struct *work) |
5ab944f9 | 172 | { |
bf6aede7 | 173 | struct delayed_work *dw = to_delayed_work(work); |
bd0072ec CS |
174 | struct zfcp_fc_wka_port *wka_port = |
175 | container_of(dw, struct zfcp_fc_wka_port, work); | |
5ab944f9 | 176 | |
5ab944f9 SS |
177 | mutex_lock(&wka_port->mutex); |
178 | if ((atomic_read(&wka_port->refcount) != 0) || | |
bd0072ec | 179 | (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) |
5ab944f9 SS |
180 | goto out; |
181 | ||
bd0072ec | 182 | wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; |
5ab944f9 | 183 | if (zfcp_fsf_close_wka_port(wka_port)) { |
bd0072ec | 184 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
185 | wake_up(&wka_port->completion_wq); |
186 | } | |
187 | out: | |
188 | mutex_unlock(&wka_port->mutex); | |
189 | } | |
190 | ||
bd0072ec | 191 | static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
192 | { |
193 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
194 | return; | |
19af5cdb | 195 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
196 | schedule_delayed_work(&wka_port->work, HZ / 100); |
197 | } | |
198 | ||
bd0072ec | 199 | static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, |
9d544f2b | 200 | struct zfcp_adapter *adapter) |
5ab944f9 | 201 | { |
5ab944f9 SS |
202 | init_waitqueue_head(&wka_port->completion_wq); |
203 | ||
204 | wka_port->adapter = adapter; | |
9d544f2b | 205 | wka_port->d_id = d_id; |
5ab944f9 | 206 | |
bd0072ec | 207 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
208 | atomic_set(&wka_port->refcount, 0); |
209 | mutex_init(&wka_port->mutex); | |
6f53a2d2 | 210 | INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); |
5ab944f9 SS |
211 | } |
212 | ||
bd0072ec | 213 | static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) |
828bc121 SS |
214 | { |
215 | cancel_delayed_work_sync(&wka->work); | |
216 | mutex_lock(&wka->mutex); | |
bd0072ec | 217 | wka->status = ZFCP_FC_WKA_PORT_OFFLINE; |
828bc121 SS |
218 | mutex_unlock(&wka->mutex); |
219 | } | |
220 | ||
bd0072ec | 221 | void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) |
55c770fa | 222 | { |
f3450c7b SS |
223 | if (!gs) |
224 | return; | |
55c770fa CS |
225 | zfcp_fc_wka_port_force_offline(&gs->ms); |
226 | zfcp_fc_wka_port_force_offline(&gs->ts); | |
227 | zfcp_fc_wka_port_force_offline(&gs->ds); | |
228 | zfcp_fc_wka_port_force_offline(&gs->as); | |
55c770fa CS |
229 | } |
230 | ||
24073b47 | 231 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
9d05ce2c | 232 | struct fc_els_rscn_page *page) |
24073b47 CS |
233 | { |
234 | unsigned long flags; | |
ecf0c772 | 235 | struct zfcp_adapter *adapter = fsf_req->adapter; |
24073b47 CS |
236 | struct zfcp_port *port; |
237 | ||
ecf0c772 SS |
238 | read_lock_irqsave(&adapter->port_list_lock, flags); |
239 | list_for_each_entry(port, &adapter->port_list, list) { | |
9d05ce2c | 240 | if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) |
6f53a2d2 | 241 | zfcp_fc_test_link(port); |
ea460a81 | 242 | } |
ecf0c772 | 243 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
24073b47 CS |
244 | } |
245 | ||
246 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
247 | { | |
248 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
c8206579 | 249 | struct zfcp_adapter *adapter = fsf_req->adapter; |
9d05ce2c CS |
250 | struct fc_els_rscn *head; |
251 | struct fc_els_rscn_page *page; | |
24073b47 CS |
252 | u16 i; |
253 | u16 no_entries; | |
9d05ce2c | 254 | unsigned int afmt; |
24073b47 | 255 | |
9d05ce2c CS |
256 | head = (struct fc_els_rscn *) status_buffer->payload.data; |
257 | page = (struct fc_els_rscn_page *) head; | |
24073b47 CS |
258 | |
259 | /* see FC-FS */ | |
9d464fc1 SM |
260 | no_entries = be16_to_cpu(head->rscn_plen) / |
261 | sizeof(struct fc_els_rscn_page); | |
24073b47 | 262 | |
c8206579 SM |
263 | if (no_entries > 1) { |
264 | /* handle failed ports */ | |
265 | unsigned long flags; | |
266 | struct zfcp_port *port; | |
267 | ||
268 | read_lock_irqsave(&adapter->port_list_lock, flags); | |
269 | list_for_each_entry(port, &adapter->port_list, list) { | |
270 | if (port->d_id) | |
271 | continue; | |
272 | zfcp_erp_port_reopen(port, | |
273 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
274 | "fcrscn1"); | |
275 | } | |
276 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
277 | } | |
278 | ||
24073b47 CS |
279 | for (i = 1; i < no_entries; i++) { |
280 | /* skip head and start with 1st element */ | |
9d05ce2c CS |
281 | page++; |
282 | afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; | |
283 | _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], | |
284 | page); | |
2d1e547f SS |
285 | zfcp_fc_enqueue_event(fsf_req->adapter, FCH_EVT_RSCN, |
286 | *(u32 *)page); | |
24073b47 | 287 | } |
43f60cbd | 288 | zfcp_fc_conditional_port_scan(fsf_req->adapter); |
24073b47 CS |
289 | } |
290 | ||
7ba58c9c | 291 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 | 292 | { |
ecf0c772 | 293 | unsigned long flags; |
24073b47 CS |
294 | struct zfcp_adapter *adapter = req->adapter; |
295 | struct zfcp_port *port; | |
24073b47 | 296 | |
ecf0c772 SS |
297 | read_lock_irqsave(&adapter->port_list_lock, flags); |
298 | list_for_each_entry(port, &adapter->port_list, list) | |
299 | if (port->wwpn == wwpn) { | |
ea4a3a6a | 300 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1"); |
24073b47 | 301 | break; |
ecf0c772 SS |
302 | } |
303 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
24073b47 CS |
304 | } |
305 | ||
306 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
307 | { | |
9d05ce2c CS |
308 | struct fsf_status_read_buffer *status_buffer; |
309 | struct fc_els_flogi *plogi; | |
24073b47 | 310 | |
9d05ce2c CS |
311 | status_buffer = (struct fsf_status_read_buffer *) req->data; |
312 | plogi = (struct fc_els_flogi *) status_buffer->payload.data; | |
9d464fc1 | 313 | zfcp_fc_incoming_wwpn(req, be64_to_cpu(plogi->fl_wwpn)); |
24073b47 CS |
314 | } |
315 | ||
316 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
317 | { | |
318 | struct fsf_status_read_buffer *status_buffer = | |
319 | (struct fsf_status_read_buffer *)req->data; | |
9d05ce2c CS |
320 | struct fc_els_logo *logo = |
321 | (struct fc_els_logo *) status_buffer->payload.data; | |
24073b47 | 322 | |
9d464fc1 | 323 | zfcp_fc_incoming_wwpn(req, be64_to_cpu(logo->fl_n_port_wwn)); |
24073b47 CS |
324 | } |
325 | ||
326 | /** | |
327 | * zfcp_fc_incoming_els - handle incoming ELS | |
8684d614 | 328 | * @fsf_req: request which contains incoming ELS |
24073b47 CS |
329 | */ |
330 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
331 | { | |
332 | struct fsf_status_read_buffer *status_buffer = | |
333 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 334 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 | 335 | |
2c55b750 | 336 | zfcp_dbf_san_in_els("fciels1", fsf_req); |
9d05ce2c | 337 | if (els_type == ELS_PLOGI) |
24073b47 | 338 | zfcp_fc_incoming_plogi(fsf_req); |
9d05ce2c | 339 | else if (els_type == ELS_LOGO) |
24073b47 | 340 | zfcp_fc_incoming_logo(fsf_req); |
9d05ce2c | 341 | else if (els_type == ELS_RSCN) |
24073b47 CS |
342 | zfcp_fc_incoming_rscn(fsf_req); |
343 | } | |
344 | ||
fcf7e614 | 345 | static void zfcp_fc_ns_gid_pn_eval(struct zfcp_fc_req *fc_req) |
24073b47 | 346 | { |
fcf7e614 CS |
347 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
348 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
24073b47 | 349 | |
fcf7e614 | 350 | if (ct_els->status) |
5ab944f9 | 351 | return; |
9d464fc1 | 352 | if (gid_pn_rsp->ct_hdr.ct_cmd != cpu_to_be16(FC_FS_ACC)) |
5ab944f9 | 353 | return; |
a5b11dda | 354 | |
24073b47 | 355 | /* looks like a valid d_id */ |
fcf7e614 | 356 | ct_els->port->d_id = ntoh24(gid_pn_rsp->gid_pn.fp_fid); |
24073b47 CS |
357 | } |
358 | ||
7c7dc196 CS |
359 | static void zfcp_fc_complete(void *data) |
360 | { | |
361 | complete(data); | |
362 | } | |
363 | ||
fcf7e614 CS |
364 | static void zfcp_fc_ct_ns_init(struct fc_ct_hdr *ct_hdr, u16 cmd, u16 mr_size) |
365 | { | |
366 | ct_hdr->ct_rev = FC_CT_REV; | |
367 | ct_hdr->ct_fs_type = FC_FST_DIR; | |
368 | ct_hdr->ct_fs_subtype = FC_NS_SUBTYPE; | |
9d464fc1 SM |
369 | ct_hdr->ct_cmd = cpu_to_be16(cmd); |
370 | ct_hdr->ct_mr_size = cpu_to_be16(mr_size / 4); | |
fcf7e614 CS |
371 | } |
372 | ||
799b76d0 | 373 | static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, |
fcf7e614 | 374 | struct zfcp_fc_req *fc_req) |
24073b47 | 375 | { |
799b76d0 | 376 | struct zfcp_adapter *adapter = port->adapter; |
7c7dc196 | 377 | DECLARE_COMPLETION_ONSTACK(completion); |
fcf7e614 CS |
378 | struct zfcp_fc_gid_pn_req *gid_pn_req = &fc_req->u.gid_pn.req; |
379 | struct zfcp_fc_gid_pn_rsp *gid_pn_rsp = &fc_req->u.gid_pn.rsp; | |
5ab944f9 | 380 | int ret; |
24073b47 CS |
381 | |
382 | /* setup parameters for send generic command */ | |
fcf7e614 CS |
383 | fc_req->ct_els.port = port; |
384 | fc_req->ct_els.handler = zfcp_fc_complete; | |
385 | fc_req->ct_els.handler_data = &completion; | |
386 | fc_req->ct_els.req = &fc_req->sg_req; | |
387 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
388 | sg_init_one(&fc_req->sg_req, gid_pn_req, sizeof(*gid_pn_req)); | |
389 | sg_init_one(&fc_req->sg_rsp, gid_pn_rsp, sizeof(*gid_pn_rsp)); | |
390 | ||
391 | zfcp_fc_ct_ns_init(&gid_pn_req->ct_hdr, | |
392 | FC_NS_GID_PN, ZFCP_FC_CT_SIZE_PAGE); | |
9d464fc1 | 393 | gid_pn_req->gid_pn.fn_wwpn = cpu_to_be64(port->wwpn); |
fcf7e614 CS |
394 | |
395 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, &fc_req->ct_els, | |
51375ee8 SS |
396 | adapter->pool.gid_pn_req, |
397 | ZFCP_FC_CTELS_TMO); | |
7c7dc196 CS |
398 | if (!ret) { |
399 | wait_for_completion(&completion); | |
fcf7e614 | 400 | zfcp_fc_ns_gid_pn_eval(fc_req); |
7c7dc196 | 401 | } |
5ab944f9 SS |
402 | return ret; |
403 | } | |
404 | ||
405 | /** | |
fcf7e614 | 406 | * zfcp_fc_ns_gid_pn - initiate GID_PN nameserver request |
799b76d0 | 407 | * @port: port where GID_PN request is needed |
5ab944f9 SS |
408 | * return: -ENOMEM on error, 0 otherwise |
409 | */ | |
799b76d0 | 410 | static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) |
5ab944f9 SS |
411 | { |
412 | int ret; | |
fcf7e614 | 413 | struct zfcp_fc_req *fc_req; |
799b76d0 | 414 | struct zfcp_adapter *adapter = port->adapter; |
5ab944f9 | 415 | |
fcf7e614 CS |
416 | fc_req = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); |
417 | if (!fc_req) | |
5ab944f9 SS |
418 | return -ENOMEM; |
419 | ||
fcf7e614 | 420 | memset(fc_req, 0, sizeof(*fc_req)); |
5ab944f9 | 421 | |
6f53a2d2 | 422 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); |
24073b47 | 423 | if (ret) |
5ab944f9 SS |
424 | goto out; |
425 | ||
fcf7e614 | 426 | ret = zfcp_fc_ns_gid_pn_request(port, fc_req); |
5ab944f9 | 427 | |
6f53a2d2 | 428 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
5ab944f9 | 429 | out: |
fcf7e614 | 430 | mempool_free(fc_req, adapter->pool.gid_pn); |
24073b47 CS |
431 | return ret; |
432 | } | |
433 | ||
799b76d0 CS |
434 | void zfcp_fc_port_did_lookup(struct work_struct *work) |
435 | { | |
436 | int ret; | |
437 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
438 | gid_pn_work); | |
439 | ||
5c750d58 | 440 | set_worker_desc("zgidpn%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */ |
799b76d0 CS |
441 | ret = zfcp_fc_ns_gid_pn(port); |
442 | if (ret) { | |
443 | /* could not issue gid_pn for some reason */ | |
ea4a3a6a | 444 | zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1"); |
799b76d0 CS |
445 | goto out; |
446 | } | |
447 | ||
448 | if (!port->d_id) { | |
edaed859 | 449 | zfcp_erp_set_port_status(port, ZFCP_STATUS_COMMON_ERP_FAILED); |
799b76d0 CS |
450 | goto out; |
451 | } | |
452 | ||
ea4a3a6a | 453 | zfcp_erp_port_reopen(port, 0, "fcgpn_3"); |
799b76d0 | 454 | out: |
615f59e0 | 455 | put_device(&port->dev); |
799b76d0 CS |
456 | } |
457 | ||
934aeb58 CS |
458 | /** |
459 | * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request | |
460 | * @port: The zfcp_port to lookup the d_id for. | |
461 | */ | |
462 | void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) | |
463 | { | |
615f59e0 | 464 | get_device(&port->dev); |
934aeb58 | 465 | if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) |
615f59e0 | 466 | put_device(&port->dev); |
934aeb58 CS |
467 | } |
468 | ||
24073b47 CS |
469 | /** |
470 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
471 | * @port: zfcp_port structure | |
472 | * @plogi: plogi payload | |
473 | * | |
474 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
475 | */ | |
9d05ce2c | 476 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) |
24073b47 | 477 | { |
9d464fc1 | 478 | if (be64_to_cpu(plogi->fl_wwpn) != port->wwpn) { |
9d05ce2c CS |
479 | port->d_id = 0; |
480 | dev_warn(&port->adapter->ccw_device->dev, | |
481 | "A port opened with WWPN 0x%016Lx returned data that " | |
482 | "identifies it as WWPN 0x%016Lx\n", | |
483 | (unsigned long long) port->wwpn, | |
9d464fc1 | 484 | (unsigned long long) be64_to_cpu(plogi->fl_wwpn)); |
9d05ce2c CS |
485 | return; |
486 | } | |
487 | ||
9d464fc1 SM |
488 | port->wwnn = be64_to_cpu(plogi->fl_wwnn); |
489 | port->maxframe_size = be16_to_cpu(plogi->fl_csp.sp_bb_data); | |
9d05ce2c | 490 | |
9d464fc1 | 491 | if (plogi->fl_cssp[0].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 492 | port->supported_classes |= FC_COS_CLASS1; |
9d464fc1 | 493 | if (plogi->fl_cssp[1].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 494 | port->supported_classes |= FC_COS_CLASS2; |
9d464fc1 | 495 | if (plogi->fl_cssp[2].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 | 496 | port->supported_classes |= FC_COS_CLASS3; |
9d464fc1 | 497 | if (plogi->fl_cssp[3].cp_class & cpu_to_be16(FC_CPC_VALID)) |
24073b47 CS |
498 | port->supported_classes |= FC_COS_CLASS4; |
499 | } | |
500 | ||
7c7dc196 | 501 | static void zfcp_fc_adisc_handler(void *data) |
24073b47 | 502 | { |
087897e3 CS |
503 | struct zfcp_fc_req *fc_req = data; |
504 | struct zfcp_port *port = fc_req->ct_els.port; | |
505 | struct fc_els_adisc *adisc_resp = &fc_req->u.adisc.rsp; | |
24073b47 | 506 | |
087897e3 | 507 | if (fc_req->ct_els.status) { |
24073b47 | 508 | /* request rejected or timed out */ |
5b43e719 | 509 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 510 | "fcadh_1"); |
24073b47 CS |
511 | goto out; |
512 | } | |
513 | ||
514 | if (!port->wwnn) | |
9d464fc1 | 515 | port->wwnn = be64_to_cpu(adisc_resp->adisc_wwnn); |
24073b47 | 516 | |
9d464fc1 | 517 | if ((port->wwpn != be64_to_cpu(adisc_resp->adisc_wwpn)) || |
a2fa0aed | 518 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 | 519 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
ea4a3a6a | 520 | "fcadh_2"); |
a2fa0aed CS |
521 | goto out; |
522 | } | |
24073b47 | 523 | |
a2fa0aed CS |
524 | /* port is good, unblock rport without going through erp */ |
525 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 | 526 | out: |
805de8f4 | 527 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
615f59e0 | 528 | put_device(&port->dev); |
087897e3 | 529 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
24073b47 CS |
530 | } |
531 | ||
532 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
533 | { | |
087897e3 | 534 | struct zfcp_fc_req *fc_req; |
24073b47 | 535 | struct zfcp_adapter *adapter = port->adapter; |
087897e3 | 536 | struct Scsi_Host *shost = adapter->scsi_host; |
ee744622 | 537 | int ret; |
24073b47 | 538 | |
087897e3 CS |
539 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_ATOMIC); |
540 | if (!fc_req) | |
24073b47 CS |
541 | return -ENOMEM; |
542 | ||
087897e3 CS |
543 | fc_req->ct_els.port = port; |
544 | fc_req->ct_els.req = &fc_req->sg_req; | |
545 | fc_req->ct_els.resp = &fc_req->sg_rsp; | |
546 | sg_init_one(&fc_req->sg_req, &fc_req->u.adisc.req, | |
9d05ce2c | 547 | sizeof(struct fc_els_adisc)); |
087897e3 | 548 | sg_init_one(&fc_req->sg_rsp, &fc_req->u.adisc.rsp, |
9d05ce2c | 549 | sizeof(struct fc_els_adisc)); |
24073b47 | 550 | |
087897e3 CS |
551 | fc_req->ct_els.handler = zfcp_fc_adisc_handler; |
552 | fc_req->ct_els.handler_data = fc_req; | |
24073b47 CS |
553 | |
554 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
555 | without FC-AL-2 capability, so we don't set it */ | |
9d464fc1 SM |
556 | fc_req->u.adisc.req.adisc_wwpn = cpu_to_be64(fc_host_port_name(shost)); |
557 | fc_req->u.adisc.req.adisc_wwnn = cpu_to_be64(fc_host_node_name(shost)); | |
087897e3 CS |
558 | fc_req->u.adisc.req.adisc_cmd = ELS_ADISC; |
559 | hton24(fc_req->u.adisc.req.adisc_port_id, fc_host_port_id(shost)); | |
24073b47 | 560 | |
087897e3 | 561 | ret = zfcp_fsf_send_els(adapter, port->d_id, &fc_req->ct_els, |
51375ee8 | 562 | ZFCP_FC_CTELS_TMO); |
ee744622 | 563 | if (ret) |
087897e3 | 564 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
ee744622 CS |
565 | |
566 | return ret; | |
24073b47 CS |
567 | } |
568 | ||
8fdf30d5 | 569 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 570 | { |
8fdf30d5 CS |
571 | struct zfcp_port *port = |
572 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
573 | int retval; |
574 | ||
5c750d58 | 575 | set_worker_desc("zadisc%16llx", port->wwpn); /* < WORKER_DESC_LEN=24 */ |
615f59e0 | 576 | get_device(&port->dev); |
a2fa0aed CS |
577 | port->rport_task = RPORT_DEL; |
578 | zfcp_scsi_rport_work(&port->rport_work); | |
579 | ||
14e242ea CS |
580 | /* only issue one test command at one time per port */ |
581 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) | |
582 | goto out; | |
583 | ||
805de8f4 | 584 | atomic_or(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
14e242ea | 585 | |
24073b47 | 586 | retval = zfcp_fc_adisc(port); |
9528539c | 587 | if (retval == 0) |
24073b47 CS |
588 | return; |
589 | ||
590 | /* send of ADISC was not possible */ | |
805de8f4 | 591 | atomic_andnot(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
ea4a3a6a | 592 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1"); |
a2fa0aed | 593 | |
14e242ea | 594 | out: |
615f59e0 | 595 | put_device(&port->dev); |
24073b47 | 596 | } |
cc8c2829 | 597 | |
8fdf30d5 | 598 | /** |
6f53a2d2 | 599 | * zfcp_fc_test_link - lightweight link test procedure |
8fdf30d5 CS |
600 | * @port: port to be tested |
601 | * | |
602 | * Test status of a link to a remote port using the ELS command ADISC. | |
603 | * If there is a problem with the remote port, error recovery steps | |
604 | * will be triggered. | |
605 | */ | |
6f53a2d2 | 606 | void zfcp_fc_test_link(struct zfcp_port *port) |
8fdf30d5 | 607 | { |
615f59e0 | 608 | get_device(&port->dev); |
4544683a | 609 | if (!queue_work(port->adapter->work_queue, &port->test_link_work)) |
615f59e0 | 610 | put_device(&port->dev); |
8fdf30d5 CS |
611 | } |
612 | ||
58f3ead5 SM |
613 | /** |
614 | * zfcp_fc_sg_free_table - free memory used by scatterlists | |
615 | * @sg: pointer to scatterlist | |
616 | * @count: number of scatterlist which are to be free'ed | |
617 | * the scatterlist are expected to reference pages always | |
618 | */ | |
619 | static void zfcp_fc_sg_free_table(struct scatterlist *sg, int count) | |
620 | { | |
621 | int i; | |
622 | ||
623 | for (i = 0; i < count; i++, sg++) | |
624 | if (sg) | |
625 | free_page((unsigned long) sg_virt(sg)); | |
626 | else | |
627 | break; | |
628 | } | |
629 | ||
630 | /** | |
631 | * zfcp_fc_sg_setup_table - init scatterlist and allocate, assign buffers | |
632 | * @sg: pointer to struct scatterlist | |
633 | * @count: number of scatterlists which should be assigned with buffers | |
634 | * of size page | |
635 | * | |
636 | * Returns: 0 on success, -ENOMEM otherwise | |
637 | */ | |
638 | static int zfcp_fc_sg_setup_table(struct scatterlist *sg, int count) | |
639 | { | |
640 | void *addr; | |
641 | int i; | |
642 | ||
643 | sg_init_table(sg, count); | |
644 | for (i = 0; i < count; i++, sg++) { | |
645 | addr = (void *) get_zeroed_page(GFP_KERNEL); | |
646 | if (!addr) { | |
647 | zfcp_fc_sg_free_table(sg, i); | |
648 | return -ENOMEM; | |
649 | } | |
650 | sg_set_buf(sg, addr, PAGE_SIZE); | |
651 | } | |
652 | return 0; | |
653 | } | |
654 | ||
d39eda54 | 655 | static struct zfcp_fc_req *zfcp_fc_alloc_sg_env(int buf_num) |
cc8c2829 | 656 | { |
f9773229 | 657 | struct zfcp_fc_req *fc_req; |
cc8c2829 | 658 | |
f9773229 CS |
659 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); |
660 | if (!fc_req) | |
cc8c2829 SS |
661 | return NULL; |
662 | ||
58f3ead5 | 663 | if (zfcp_fc_sg_setup_table(&fc_req->sg_rsp, buf_num)) { |
f9773229 CS |
664 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
665 | return NULL; | |
cc8c2829 | 666 | } |
cc8c2829 | 667 | |
f9773229 CS |
668 | sg_init_one(&fc_req->sg_req, &fc_req->u.gpn_ft.req, |
669 | sizeof(struct zfcp_fc_gpn_ft_req)); | |
cc8c2829 | 670 | |
f9773229 CS |
671 | return fc_req; |
672 | } | |
cc8c2829 | 673 | |
f9773229 | 674 | static int zfcp_fc_send_gpn_ft(struct zfcp_fc_req *fc_req, |
6f53a2d2 | 675 | struct zfcp_adapter *adapter, int max_bytes) |
cc8c2829 | 676 | { |
f9773229 CS |
677 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
678 | struct zfcp_fc_gpn_ft_req *req = &fc_req->u.gpn_ft.req; | |
7c7dc196 | 679 | DECLARE_COMPLETION_ONSTACK(completion); |
cc8c2829 SS |
680 | int ret; |
681 | ||
f9773229 | 682 | zfcp_fc_ct_ns_init(&req->ct_hdr, FC_NS_GPN_FT, max_bytes); |
dbf5dfe9 | 683 | req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; |
cc8c2829 | 684 | |
f9773229 CS |
685 | ct_els->handler = zfcp_fc_complete; |
686 | ct_els->handler_data = &completion; | |
687 | ct_els->req = &fc_req->sg_req; | |
688 | ct_els->resp = &fc_req->sg_rsp; | |
cc8c2829 | 689 | |
f9773229 | 690 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, |
51375ee8 | 691 | ZFCP_FC_CTELS_TMO); |
cc8c2829 | 692 | if (!ret) |
7c7dc196 | 693 | wait_for_completion(&completion); |
cc8c2829 SS |
694 | return ret; |
695 | } | |
696 | ||
f3450c7b | 697 | static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) |
cc8c2829 | 698 | { |
6ab35c07 MP |
699 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
700 | return; | |
701 | ||
805de8f4 | 702 | atomic_andnot(ZFCP_STATUS_COMMON_NOESC, &port->status); |
cc8c2829 | 703 | |
0406289e | 704 | if ((port->supported_classes != 0) || |
f3450c7b | 705 | !list_empty(&port->unit_list)) |
cc8c2829 | 706 | return; |
f3450c7b | 707 | |
f3450c7b | 708 | list_move_tail(&port->list, lh); |
cc8c2829 SS |
709 | } |
710 | ||
f9773229 | 711 | static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_req *fc_req, |
7c7dc196 | 712 | struct zfcp_adapter *adapter, int max_entries) |
cc8c2829 | 713 | { |
f9773229 CS |
714 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; |
715 | struct scatterlist *sg = &fc_req->sg_rsp; | |
dbf5dfe9 CS |
716 | struct fc_ct_hdr *hdr = sg_virt(sg); |
717 | struct fc_gpn_ft_resp *acc = sg_virt(sg); | |
cc8c2829 | 718 | struct zfcp_port *port, *tmp; |
ecf0c772 | 719 | unsigned long flags; |
f3450c7b | 720 | LIST_HEAD(remove_lh); |
cc8c2829 | 721 | u32 d_id; |
47f7bba5 | 722 | int ret = 0, x, last = 0; |
cc8c2829 | 723 | |
f9773229 | 724 | if (ct_els->status) |
cc8c2829 SS |
725 | return -EIO; |
726 | ||
9d464fc1 | 727 | if (hdr->ct_cmd != cpu_to_be16(FC_FS_ACC)) { |
ab8ab4be | 728 | if (hdr->ct_reason == FC_FS_RJT_UNABL) |
cc8c2829 SS |
729 | return -EAGAIN; /* might be a temporary condition */ |
730 | return -EIO; | |
731 | } | |
732 | ||
dbf5dfe9 | 733 | if (hdr->ct_mr_size) { |
39eb7e9a CS |
734 | dev_warn(&adapter->ccw_device->dev, |
735 | "The name server reported %d words residual data\n", | |
dbf5dfe9 | 736 | hdr->ct_mr_size); |
cc8c2829 | 737 | return -E2BIG; |
39eb7e9a | 738 | } |
cc8c2829 | 739 | |
cc8c2829 | 740 | /* first entry is the header */ |
39eb7e9a | 741 | for (x = 1; x < max_entries && !last; x++) { |
dbf5dfe9 | 742 | if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
cc8c2829 SS |
743 | acc++; |
744 | else | |
745 | acc = sg_virt(++sg); | |
746 | ||
dbf5dfe9 CS |
747 | last = acc->fp_flags & FC_NS_FID_LAST; |
748 | d_id = ntoh24(acc->fp_fid); | |
cc8c2829 | 749 | |
5ab944f9 | 750 | /* don't attach ports with a well known address */ |
dbf5dfe9 | 751 | if (d_id >= FC_FID_WELL_KNOWN_BASE) |
5ab944f9 | 752 | continue; |
cc8c2829 | 753 | /* skip the adapter's port and known remote ports */ |
9d464fc1 SM |
754 | if (be64_to_cpu(acc->fp_wwpn) == |
755 | fc_host_port_name(adapter->scsi_host)) | |
cc8c2829 SS |
756 | continue; |
757 | ||
9d464fc1 | 758 | port = zfcp_port_enqueue(adapter, be64_to_cpu(acc->fp_wwpn), |
cc8c2829 | 759 | ZFCP_STATUS_COMMON_NOESC, d_id); |
ecf0c772 | 760 | if (!IS_ERR(port)) |
ea4a3a6a | 761 | zfcp_erp_port_reopen(port, 0, "fcegpf1"); |
ecf0c772 SS |
762 | else if (PTR_ERR(port) != -EEXIST) |
763 | ret = PTR_ERR(port); | |
cc8c2829 SS |
764 | } |
765 | ||
766 | zfcp_erp_wait(adapter); | |
ecf0c772 SS |
767 | write_lock_irqsave(&adapter->port_list_lock, flags); |
768 | list_for_each_entry_safe(port, tmp, &adapter->port_list, list) | |
f3450c7b | 769 | zfcp_fc_validate_port(port, &remove_lh); |
ecf0c772 | 770 | write_unlock_irqrestore(&adapter->port_list_lock, flags); |
f3450c7b SS |
771 | |
772 | list_for_each_entry_safe(port, tmp, &remove_lh, list) { | |
ea4a3a6a | 773 | zfcp_erp_port_shutdown(port, 0, "fcegpf2"); |
83d4e1c3 | 774 | device_unregister(&port->dev); |
f3450c7b SS |
775 | } |
776 | ||
cc8c2829 SS |
777 | return ret; |
778 | } | |
779 | ||
780 | /** | |
6f53a2d2 | 781 | * zfcp_fc_scan_ports - scan remote ports and attach new ports |
9eae07ef | 782 | * @work: reference to scheduled work |
cc8c2829 | 783 | */ |
9eae07ef | 784 | void zfcp_fc_scan_ports(struct work_struct *work) |
cc8c2829 | 785 | { |
18f87a67 MP |
786 | struct delayed_work *dw = to_delayed_work(work); |
787 | struct zfcp_adapter *adapter = container_of(dw, struct zfcp_adapter, | |
9eae07ef | 788 | scan_work); |
cc8c2829 | 789 | int ret, i; |
f9773229 | 790 | struct zfcp_fc_req *fc_req; |
39eb7e9a CS |
791 | int chain, max_entries, buf_num, max_bytes; |
792 | ||
18f87a67 MP |
793 | zfcp_fc_port_scan_time(adapter); |
794 | ||
39eb7e9a | 795 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; |
dbf5dfe9 CS |
796 | buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; |
797 | max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; | |
798 | max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; | |
cc8c2829 | 799 | |
306b6edc SS |
800 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
801 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
9eae07ef | 802 | return; |
cc8c2829 | 803 | |
9eae07ef SS |
804 | if (zfcp_fc_wka_port_get(&adapter->gs->ds)) |
805 | return; | |
cc8c2829 | 806 | |
d39eda54 | 807 | fc_req = zfcp_fc_alloc_sg_env(buf_num); |
f9773229 | 808 | if (!fc_req) |
5ab944f9 | 809 | goto out; |
cc8c2829 SS |
810 | |
811 | for (i = 0; i < 3; i++) { | |
f9773229 | 812 | ret = zfcp_fc_send_gpn_ft(fc_req, adapter, max_bytes); |
cc8c2829 | 813 | if (!ret) { |
f9773229 | 814 | ret = zfcp_fc_eval_gpn_ft(fc_req, adapter, max_entries); |
cc8c2829 SS |
815 | if (ret == -EAGAIN) |
816 | ssleep(1); | |
817 | else | |
818 | break; | |
819 | } | |
820 | } | |
58f3ead5 | 821 | zfcp_fc_sg_free_table(&fc_req->sg_rsp, buf_num); |
f9773229 | 822 | kmem_cache_free(zfcp_fc_req_cache, fc_req); |
5ab944f9 | 823 | out: |
6f53a2d2 | 824 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
cc8c2829 SS |
825 | } |
826 | ||
038d9446 CS |
827 | static int zfcp_fc_gspn(struct zfcp_adapter *adapter, |
828 | struct zfcp_fc_req *fc_req) | |
829 | { | |
830 | DECLARE_COMPLETION_ONSTACK(completion); | |
831 | char devno[] = "DEVNO:"; | |
832 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
833 | struct zfcp_fc_gspn_req *gspn_req = &fc_req->u.gspn.req; | |
834 | struct zfcp_fc_gspn_rsp *gspn_rsp = &fc_req->u.gspn.rsp; | |
835 | int ret; | |
836 | ||
837 | zfcp_fc_ct_ns_init(&gspn_req->ct_hdr, FC_NS_GSPN_ID, | |
838 | FC_SYMBOLIC_NAME_SIZE); | |
839 | hton24(gspn_req->gspn.fp_fid, fc_host_port_id(adapter->scsi_host)); | |
840 | ||
841 | sg_init_one(&fc_req->sg_req, gspn_req, sizeof(*gspn_req)); | |
842 | sg_init_one(&fc_req->sg_rsp, gspn_rsp, sizeof(*gspn_rsp)); | |
843 | ||
844 | ct_els->handler = zfcp_fc_complete; | |
845 | ct_els->handler_data = &completion; | |
846 | ct_els->req = &fc_req->sg_req; | |
847 | ct_els->resp = &fc_req->sg_rsp; | |
848 | ||
849 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
850 | ZFCP_FC_CTELS_TMO); | |
851 | if (ret) | |
852 | return ret; | |
853 | ||
854 | wait_for_completion(&completion); | |
855 | if (ct_els->status) | |
856 | return ct_els->status; | |
857 | ||
858 | if (fc_host_port_type(adapter->scsi_host) == FC_PORTTYPE_NPIV && | |
859 | !(strstr(gspn_rsp->gspn.fp_name, devno))) | |
860 | snprintf(fc_host_symbolic_name(adapter->scsi_host), | |
861 | FC_SYMBOLIC_NAME_SIZE, "%s%s %s NAME: %s", | |
862 | gspn_rsp->gspn.fp_name, devno, | |
863 | dev_name(&adapter->ccw_device->dev), | |
864 | init_utsname()->nodename); | |
865 | else | |
866 | strlcpy(fc_host_symbolic_name(adapter->scsi_host), | |
867 | gspn_rsp->gspn.fp_name, FC_SYMBOLIC_NAME_SIZE); | |
868 | ||
869 | return 0; | |
870 | } | |
871 | ||
872 | static void zfcp_fc_rspn(struct zfcp_adapter *adapter, | |
873 | struct zfcp_fc_req *fc_req) | |
874 | { | |
875 | DECLARE_COMPLETION_ONSTACK(completion); | |
876 | struct Scsi_Host *shost = adapter->scsi_host; | |
877 | struct zfcp_fsf_ct_els *ct_els = &fc_req->ct_els; | |
878 | struct zfcp_fc_rspn_req *rspn_req = &fc_req->u.rspn.req; | |
879 | struct fc_ct_hdr *rspn_rsp = &fc_req->u.rspn.rsp; | |
880 | int ret, len; | |
881 | ||
882 | zfcp_fc_ct_ns_init(&rspn_req->ct_hdr, FC_NS_RSPN_ID, | |
883 | FC_SYMBOLIC_NAME_SIZE); | |
884 | hton24(rspn_req->rspn.fr_fid.fp_fid, fc_host_port_id(shost)); | |
885 | len = strlcpy(rspn_req->rspn.fr_name, fc_host_symbolic_name(shost), | |
886 | FC_SYMBOLIC_NAME_SIZE); | |
887 | rspn_req->rspn.fr_name_len = len; | |
888 | ||
889 | sg_init_one(&fc_req->sg_req, rspn_req, sizeof(*rspn_req)); | |
890 | sg_init_one(&fc_req->sg_rsp, rspn_rsp, sizeof(*rspn_rsp)); | |
891 | ||
892 | ct_els->handler = zfcp_fc_complete; | |
893 | ct_els->handler_data = &completion; | |
894 | ct_els->req = &fc_req->sg_req; | |
895 | ct_els->resp = &fc_req->sg_rsp; | |
896 | ||
897 | ret = zfcp_fsf_send_ct(&adapter->gs->ds, ct_els, NULL, | |
898 | ZFCP_FC_CTELS_TMO); | |
899 | if (!ret) | |
900 | wait_for_completion(&completion); | |
901 | } | |
902 | ||
903 | /** | |
904 | * zfcp_fc_sym_name_update - Retrieve and update the symbolic port name | |
905 | * @work: ns_up_work of the adapter where to update the symbolic port name | |
906 | * | |
907 | * Retrieve the current symbolic port name that may have been set by | |
908 | * the hardware using the GSPN request and update the fc_host | |
909 | * symbolic_name sysfs attribute. When running in NPIV mode (and hence | |
910 | * the port name is unique for this system), update the symbolic port | |
911 | * name to add Linux specific information and update the FC nameserver | |
912 | * using the RSPN request. | |
913 | */ | |
914 | void zfcp_fc_sym_name_update(struct work_struct *work) | |
915 | { | |
916 | struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, | |
917 | ns_up_work); | |
918 | int ret; | |
919 | struct zfcp_fc_req *fc_req; | |
920 | ||
921 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && | |
922 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
923 | return; | |
924 | ||
925 | fc_req = kmem_cache_zalloc(zfcp_fc_req_cache, GFP_KERNEL); | |
926 | if (!fc_req) | |
927 | return; | |
928 | ||
929 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); | |
930 | if (ret) | |
931 | goto out_free; | |
932 | ||
933 | ret = zfcp_fc_gspn(adapter, fc_req); | |
934 | if (ret || fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
935 | goto out_ds_put; | |
936 | ||
937 | memset(fc_req, 0, sizeof(*fc_req)); | |
938 | zfcp_fc_rspn(adapter, fc_req); | |
939 | ||
940 | out_ds_put: | |
941 | zfcp_fc_wka_port_put(&adapter->gs->ds); | |
942 | out_free: | |
943 | kmem_cache_free(zfcp_fc_req_cache, fc_req); | |
944 | } | |
945 | ||
7c7dc196 | 946 | static void zfcp_fc_ct_els_job_handler(void *data) |
9d544f2b | 947 | { |
75cc8cfc | 948 | struct bsg_job *job = data; |
7c7dc196 | 949 | struct zfcp_fsf_ct_els *zfcp_ct_els = job->dd_data; |
7dec9cf1 | 950 | struct fc_bsg_reply *jr = job->reply; |
9d544f2b | 951 | |
7dec9cf1 SS |
952 | jr->reply_payload_rcv_len = job->reply_payload.payload_len; |
953 | jr->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; | |
954 | jr->result = zfcp_ct_els->status ? -EIO : 0; | |
06548160 | 955 | bsg_job_done(job, jr->result, jr->reply_payload_rcv_len); |
9d544f2b SS |
956 | } |
957 | ||
75cc8cfc | 958 | static struct zfcp_fc_wka_port *zfcp_fc_job_wka_port(struct bsg_job *job) |
f09d5454 CS |
959 | { |
960 | u32 preamble_word1; | |
961 | u8 gs_type; | |
962 | struct zfcp_adapter *adapter; | |
01e0e15c | 963 | struct fc_bsg_request *bsg_request = job->request; |
1d69b122 | 964 | struct fc_rport *rport = fc_bsg_to_rport(job); |
cd21c605 | 965 | struct Scsi_Host *shost; |
f09d5454 | 966 | |
01e0e15c | 967 | preamble_word1 = bsg_request->rqst_data.r_ct.preamble_word1; |
f09d5454 CS |
968 | gs_type = (preamble_word1 & 0xff000000) >> 24; |
969 | ||
1d69b122 | 970 | shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job); |
cd21c605 | 971 | adapter = (struct zfcp_adapter *) shost->hostdata[0]; |
f09d5454 CS |
972 | |
973 | switch (gs_type) { | |
974 | case FC_FST_ALIAS: | |
975 | return &adapter->gs->as; | |
976 | case FC_FST_MGMT: | |
977 | return &adapter->gs->ms; | |
978 | case FC_FST_TIME: | |
979 | return &adapter->gs->ts; | |
980 | break; | |
981 | case FC_FST_DIR: | |
982 | return &adapter->gs->ds; | |
983 | break; | |
984 | default: | |
985 | return NULL; | |
986 | } | |
987 | } | |
988 | ||
989 | static void zfcp_fc_ct_job_handler(void *data) | |
990 | { | |
75cc8cfc | 991 | struct bsg_job *job = data; |
f09d5454 CS |
992 | struct zfcp_fc_wka_port *wka_port; |
993 | ||
994 | wka_port = zfcp_fc_job_wka_port(job); | |
995 | zfcp_fc_wka_port_put(wka_port); | |
996 | ||
997 | zfcp_fc_ct_els_job_handler(data); | |
998 | } | |
999 | ||
75cc8cfc | 1000 | static int zfcp_fc_exec_els_job(struct bsg_job *job, |
7c7dc196 | 1001 | struct zfcp_adapter *adapter) |
9d544f2b | 1002 | { |
7c7dc196 | 1003 | struct zfcp_fsf_ct_els *els = job->dd_data; |
1d69b122 | 1004 | struct fc_rport *rport = fc_bsg_to_rport(job); |
01e0e15c | 1005 | struct fc_bsg_request *bsg_request = job->request; |
9d544f2b | 1006 | struct zfcp_port *port; |
7c7dc196 | 1007 | u32 d_id; |
9d544f2b | 1008 | |
9d544f2b | 1009 | if (rport) { |
ea945ff8 | 1010 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
7c7dc196 | 1011 | if (!port) |
9d544f2b | 1012 | return -EINVAL; |
ecf0c772 | 1013 | |
7c7dc196 | 1014 | d_id = port->d_id; |
615f59e0 | 1015 | put_device(&port->dev); |
7c7dc196 | 1016 | } else |
01e0e15c | 1017 | d_id = ntoh24(bsg_request->rqst_data.h_els.port_id); |
9d544f2b | 1018 | |
f09d5454 | 1019 | els->handler = zfcp_fc_ct_els_job_handler; |
31156ec3 | 1020 | return zfcp_fsf_send_els(adapter, d_id, els, job->timeout / HZ); |
9d544f2b SS |
1021 | } |
1022 | ||
75cc8cfc | 1023 | static int zfcp_fc_exec_ct_job(struct bsg_job *job, |
7c7dc196 | 1024 | struct zfcp_adapter *adapter) |
9d544f2b SS |
1025 | { |
1026 | int ret; | |
7c7dc196 CS |
1027 | struct zfcp_fsf_ct_els *ct = job->dd_data; |
1028 | struct zfcp_fc_wka_port *wka_port; | |
9d544f2b | 1029 | |
f09d5454 CS |
1030 | wka_port = zfcp_fc_job_wka_port(job); |
1031 | if (!wka_port) | |
1032 | return -EINVAL; | |
9d544f2b | 1033 | |
7c7dc196 CS |
1034 | ret = zfcp_fc_wka_port_get(wka_port); |
1035 | if (ret) | |
9d544f2b | 1036 | return ret; |
9d544f2b | 1037 | |
f09d5454 | 1038 | ct->handler = zfcp_fc_ct_job_handler; |
31156ec3 | 1039 | ret = zfcp_fsf_send_ct(wka_port, ct, NULL, job->timeout / HZ); |
7c7dc196 CS |
1040 | if (ret) |
1041 | zfcp_fc_wka_port_put(wka_port); | |
9d544f2b | 1042 | |
9d544f2b SS |
1043 | return ret; |
1044 | } | |
d5a282a1 | 1045 | |
75cc8cfc | 1046 | int zfcp_fc_exec_bsg_job(struct bsg_job *job) |
7c7dc196 CS |
1047 | { |
1048 | struct Scsi_Host *shost; | |
1049 | struct zfcp_adapter *adapter; | |
1050 | struct zfcp_fsf_ct_els *ct_els = job->dd_data; | |
01e0e15c | 1051 | struct fc_bsg_request *bsg_request = job->request; |
1d69b122 | 1052 | struct fc_rport *rport = fc_bsg_to_rport(job); |
7c7dc196 | 1053 | |
1d69b122 | 1054 | shost = rport ? rport_to_shost(rport) : fc_bsg_to_shost(job); |
7c7dc196 CS |
1055 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; |
1056 | ||
1057 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
1058 | return -EINVAL; | |
1059 | ||
1060 | ct_els->req = job->request_payload.sg_list; | |
1061 | ct_els->resp = job->reply_payload.sg_list; | |
7c7dc196 CS |
1062 | ct_els->handler_data = job; |
1063 | ||
01e0e15c | 1064 | switch (bsg_request->msgcode) { |
7c7dc196 CS |
1065 | case FC_BSG_RPT_ELS: |
1066 | case FC_BSG_HST_ELS_NOLOGIN: | |
1067 | return zfcp_fc_exec_els_job(job, adapter); | |
1068 | case FC_BSG_RPT_CT: | |
1069 | case FC_BSG_HST_CT: | |
1070 | return zfcp_fc_exec_ct_job(job, adapter); | |
1071 | default: | |
1072 | return -EINVAL; | |
1073 | } | |
1074 | } | |
1075 | ||
75cc8cfc | 1076 | int zfcp_fc_timeout_bsg_job(struct bsg_job *job) |
491ca442 SS |
1077 | { |
1078 | /* hardware tracks timeout, reset bsg timeout to not interfere */ | |
1079 | return -EAGAIN; | |
1080 | } | |
1081 | ||
d5a282a1 SS |
1082 | int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) |
1083 | { | |
bd0072ec | 1084 | struct zfcp_fc_wka_ports *wka_ports; |
d5a282a1 | 1085 | |
bd0072ec | 1086 | wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); |
d5a282a1 SS |
1087 | if (!wka_ports) |
1088 | return -ENOMEM; | |
1089 | ||
1090 | adapter->gs = wka_ports; | |
1091 | zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); | |
1092 | zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); | |
1093 | zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); | |
1094 | zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); | |
d5a282a1 SS |
1095 | |
1096 | return 0; | |
1097 | } | |
1098 | ||
1099 | void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) | |
1100 | { | |
1101 | kfree(adapter->gs); | |
1102 | adapter->gs = NULL; | |
1103 | } | |
1104 |