Commit | Line | Data |
---|---|---|
24073b47 CS |
1 | /* |
2 | * zfcp device driver | |
3 | * | |
4 | * Fibre Channel related functions for the zfcp device driver. | |
5 | * | |
a2fa0aed | 6 | * Copyright IBM Corporation 2008, 2009 |
24073b47 CS |
7 | */ |
8 | ||
ecf39d42 CS |
9 | #define KMSG_COMPONENT "zfcp" |
10 | #define pr_fmt(fmt) KMSG_COMPONENT ": " fmt | |
11 | ||
9d05ce2c CS |
12 | #include <linux/types.h> |
13 | #include <scsi/fc/fc_els.h> | |
14 | #include <scsi/libfc.h> | |
24073b47 | 15 | #include "zfcp_ext.h" |
9d05ce2c | 16 | #include "zfcp_fc.h" |
24073b47 | 17 | |
9d05ce2c CS |
18 | static u32 zfcp_fc_rscn_range_mask[] = { |
19 | [ELS_ADDR_FMT_PORT] = 0xFFFFFF, | |
20 | [ELS_ADDR_FMT_AREA] = 0xFFFF00, | |
21 | [ELS_ADDR_FMT_DOM] = 0xFF0000, | |
22 | [ELS_ADDR_FMT_FAB] = 0x000000, | |
e0d7fcb5 CS |
23 | }; |
24 | ||
5ab944f9 SS |
25 | struct zfcp_fc_ns_handler_data { |
26 | struct completion done; | |
27 | void (*handler)(unsigned long); | |
28 | unsigned long handler_data; | |
29 | }; | |
30 | ||
bd0072ec | 31 | static int zfcp_fc_wka_port_get(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
32 | { |
33 | if (mutex_lock_interruptible(&wka_port->mutex)) | |
34 | return -ERESTARTSYS; | |
35 | ||
bd0072ec CS |
36 | if (wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE || |
37 | wka_port->status == ZFCP_FC_WKA_PORT_CLOSING) { | |
38 | wka_port->status = ZFCP_FC_WKA_PORT_OPENING; | |
5ab944f9 | 39 | if (zfcp_fsf_open_wka_port(wka_port)) |
bd0072ec | 40 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
41 | } |
42 | ||
43 | mutex_unlock(&wka_port->mutex); | |
44 | ||
27f492cc | 45 | wait_event(wka_port->completion_wq, |
bd0072ec CS |
46 | wka_port->status == ZFCP_FC_WKA_PORT_ONLINE || |
47 | wka_port->status == ZFCP_FC_WKA_PORT_OFFLINE); | |
5ab944f9 | 48 | |
bd0072ec | 49 | if (wka_port->status == ZFCP_FC_WKA_PORT_ONLINE) { |
5ab944f9 SS |
50 | atomic_inc(&wka_port->refcount); |
51 | return 0; | |
52 | } | |
53 | return -EIO; | |
54 | } | |
55 | ||
6f53a2d2 | 56 | static void zfcp_fc_wka_port_offline(struct work_struct *work) |
5ab944f9 | 57 | { |
bf6aede7 | 58 | struct delayed_work *dw = to_delayed_work(work); |
bd0072ec CS |
59 | struct zfcp_fc_wka_port *wka_port = |
60 | container_of(dw, struct zfcp_fc_wka_port, work); | |
5ab944f9 | 61 | |
5ab944f9 SS |
62 | mutex_lock(&wka_port->mutex); |
63 | if ((atomic_read(&wka_port->refcount) != 0) || | |
bd0072ec | 64 | (wka_port->status != ZFCP_FC_WKA_PORT_ONLINE)) |
5ab944f9 SS |
65 | goto out; |
66 | ||
bd0072ec | 67 | wka_port->status = ZFCP_FC_WKA_PORT_CLOSING; |
5ab944f9 | 68 | if (zfcp_fsf_close_wka_port(wka_port)) { |
bd0072ec | 69 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
70 | wake_up(&wka_port->completion_wq); |
71 | } | |
72 | out: | |
73 | mutex_unlock(&wka_port->mutex); | |
74 | } | |
75 | ||
bd0072ec | 76 | static void zfcp_fc_wka_port_put(struct zfcp_fc_wka_port *wka_port) |
5ab944f9 SS |
77 | { |
78 | if (atomic_dec_return(&wka_port->refcount) != 0) | |
79 | return; | |
19af5cdb | 80 | /* wait 10 milliseconds, other reqs might pop in */ |
5ab944f9 SS |
81 | schedule_delayed_work(&wka_port->work, HZ / 100); |
82 | } | |
83 | ||
bd0072ec | 84 | static void zfcp_fc_wka_port_init(struct zfcp_fc_wka_port *wka_port, u32 d_id, |
9d544f2b | 85 | struct zfcp_adapter *adapter) |
5ab944f9 | 86 | { |
5ab944f9 SS |
87 | init_waitqueue_head(&wka_port->completion_wq); |
88 | ||
89 | wka_port->adapter = adapter; | |
9d544f2b | 90 | wka_port->d_id = d_id; |
5ab944f9 | 91 | |
bd0072ec | 92 | wka_port->status = ZFCP_FC_WKA_PORT_OFFLINE; |
5ab944f9 SS |
93 | atomic_set(&wka_port->refcount, 0); |
94 | mutex_init(&wka_port->mutex); | |
6f53a2d2 | 95 | INIT_DELAYED_WORK(&wka_port->work, zfcp_fc_wka_port_offline); |
5ab944f9 SS |
96 | } |
97 | ||
bd0072ec | 98 | static void zfcp_fc_wka_port_force_offline(struct zfcp_fc_wka_port *wka) |
828bc121 SS |
99 | { |
100 | cancel_delayed_work_sync(&wka->work); | |
101 | mutex_lock(&wka->mutex); | |
bd0072ec | 102 | wka->status = ZFCP_FC_WKA_PORT_OFFLINE; |
828bc121 SS |
103 | mutex_unlock(&wka->mutex); |
104 | } | |
105 | ||
bd0072ec | 106 | void zfcp_fc_wka_ports_force_offline(struct zfcp_fc_wka_ports *gs) |
55c770fa | 107 | { |
f3450c7b SS |
108 | if (!gs) |
109 | return; | |
55c770fa CS |
110 | zfcp_fc_wka_port_force_offline(&gs->ms); |
111 | zfcp_fc_wka_port_force_offline(&gs->ts); | |
112 | zfcp_fc_wka_port_force_offline(&gs->ds); | |
113 | zfcp_fc_wka_port_force_offline(&gs->as); | |
55c770fa CS |
114 | } |
115 | ||
24073b47 | 116 | static void _zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req, u32 range, |
9d05ce2c | 117 | struct fc_els_rscn_page *page) |
24073b47 CS |
118 | { |
119 | unsigned long flags; | |
ecf0c772 | 120 | struct zfcp_adapter *adapter = fsf_req->adapter; |
24073b47 CS |
121 | struct zfcp_port *port; |
122 | ||
ecf0c772 SS |
123 | read_lock_irqsave(&adapter->port_list_lock, flags); |
124 | list_for_each_entry(port, &adapter->port_list, list) { | |
9d05ce2c | 125 | if ((port->d_id & range) == (ntoh24(page->rscn_fid) & range)) |
6f53a2d2 | 126 | zfcp_fc_test_link(port); |
ea460a81 SS |
127 | if (!port->d_id) |
128 | zfcp_erp_port_reopen(port, | |
129 | ZFCP_STATUS_COMMON_ERP_FAILED, | |
130 | "fcrscn1", NULL); | |
131 | } | |
ecf0c772 | 132 | read_unlock_irqrestore(&adapter->port_list_lock, flags); |
24073b47 CS |
133 | } |
134 | ||
135 | static void zfcp_fc_incoming_rscn(struct zfcp_fsf_req *fsf_req) | |
136 | { | |
137 | struct fsf_status_read_buffer *status_buffer = (void *)fsf_req->data; | |
9d05ce2c CS |
138 | struct fc_els_rscn *head; |
139 | struct fc_els_rscn_page *page; | |
24073b47 CS |
140 | u16 i; |
141 | u16 no_entries; | |
9d05ce2c | 142 | unsigned int afmt; |
24073b47 | 143 | |
9d05ce2c CS |
144 | head = (struct fc_els_rscn *) status_buffer->payload.data; |
145 | page = (struct fc_els_rscn_page *) head; | |
24073b47 CS |
146 | |
147 | /* see FC-FS */ | |
9d05ce2c | 148 | no_entries = head->rscn_plen / sizeof(struct fc_els_rscn_page); |
24073b47 CS |
149 | |
150 | for (i = 1; i < no_entries; i++) { | |
151 | /* skip head and start with 1st element */ | |
9d05ce2c CS |
152 | page++; |
153 | afmt = page->rscn_page_flags & ELS_RSCN_ADDR_FMT_MASK; | |
154 | _zfcp_fc_incoming_rscn(fsf_req, zfcp_fc_rscn_range_mask[afmt], | |
155 | page); | |
24073b47 | 156 | } |
9eae07ef | 157 | queue_work(fsf_req->adapter->work_queue, &fsf_req->adapter->scan_work); |
24073b47 CS |
158 | } |
159 | ||
7ba58c9c | 160 | static void zfcp_fc_incoming_wwpn(struct zfcp_fsf_req *req, u64 wwpn) |
24073b47 | 161 | { |
ecf0c772 | 162 | unsigned long flags; |
24073b47 CS |
163 | struct zfcp_adapter *adapter = req->adapter; |
164 | struct zfcp_port *port; | |
24073b47 | 165 | |
ecf0c772 SS |
166 | read_lock_irqsave(&adapter->port_list_lock, flags); |
167 | list_for_each_entry(port, &adapter->port_list, list) | |
168 | if (port->wwpn == wwpn) { | |
169 | zfcp_erp_port_forced_reopen(port, 0, "fciwwp1", req); | |
24073b47 | 170 | break; |
ecf0c772 SS |
171 | } |
172 | read_unlock_irqrestore(&adapter->port_list_lock, flags); | |
24073b47 CS |
173 | } |
174 | ||
175 | static void zfcp_fc_incoming_plogi(struct zfcp_fsf_req *req) | |
176 | { | |
9d05ce2c CS |
177 | struct fsf_status_read_buffer *status_buffer; |
178 | struct fc_els_flogi *plogi; | |
24073b47 | 179 | |
9d05ce2c CS |
180 | status_buffer = (struct fsf_status_read_buffer *) req->data; |
181 | plogi = (struct fc_els_flogi *) status_buffer->payload.data; | |
182 | zfcp_fc_incoming_wwpn(req, plogi->fl_wwpn); | |
24073b47 CS |
183 | } |
184 | ||
185 | static void zfcp_fc_incoming_logo(struct zfcp_fsf_req *req) | |
186 | { | |
187 | struct fsf_status_read_buffer *status_buffer = | |
188 | (struct fsf_status_read_buffer *)req->data; | |
9d05ce2c CS |
189 | struct fc_els_logo *logo = |
190 | (struct fc_els_logo *) status_buffer->payload.data; | |
24073b47 | 191 | |
9d05ce2c | 192 | zfcp_fc_incoming_wwpn(req, logo->fl_n_port_wwn); |
24073b47 CS |
193 | } |
194 | ||
195 | /** | |
196 | * zfcp_fc_incoming_els - handle incoming ELS | |
197 | * @fsf_req - request which contains incoming ELS | |
198 | */ | |
199 | void zfcp_fc_incoming_els(struct zfcp_fsf_req *fsf_req) | |
200 | { | |
201 | struct fsf_status_read_buffer *status_buffer = | |
202 | (struct fsf_status_read_buffer *) fsf_req->data; | |
c41f8cbd | 203 | unsigned int els_type = status_buffer->payload.data[0]; |
24073b47 | 204 | |
5771710b | 205 | zfcp_dbf_san_incoming_els(fsf_req); |
9d05ce2c | 206 | if (els_type == ELS_PLOGI) |
24073b47 | 207 | zfcp_fc_incoming_plogi(fsf_req); |
9d05ce2c | 208 | else if (els_type == ELS_LOGO) |
24073b47 | 209 | zfcp_fc_incoming_logo(fsf_req); |
9d05ce2c | 210 | else if (els_type == ELS_RSCN) |
24073b47 CS |
211 | zfcp_fc_incoming_rscn(fsf_req); |
212 | } | |
213 | ||
5ab944f9 SS |
214 | static void zfcp_fc_ns_handler(unsigned long data) |
215 | { | |
216 | struct zfcp_fc_ns_handler_data *compl_rec = | |
217 | (struct zfcp_fc_ns_handler_data *) data; | |
218 | ||
219 | if (compl_rec->handler) | |
220 | compl_rec->handler(compl_rec->handler_data); | |
221 | ||
222 | complete(&compl_rec->done); | |
223 | } | |
224 | ||
225 | static void zfcp_fc_ns_gid_pn_eval(unsigned long data) | |
24073b47 | 226 | { |
dbf5dfe9 | 227 | struct zfcp_fc_gid_pn *gid_pn = (struct zfcp_fc_gid_pn *) data; |
24073b47 | 228 | struct zfcp_send_ct *ct = &gid_pn->ct; |
dbf5dfe9 CS |
229 | struct zfcp_fc_gid_pn_req *gid_pn_req = sg_virt(ct->req); |
230 | struct zfcp_fc_gid_pn_resp *gid_pn_resp = sg_virt(ct->resp); | |
24073b47 CS |
231 | struct zfcp_port *port = gid_pn->port; |
232 | ||
233 | if (ct->status) | |
5ab944f9 | 234 | return; |
dbf5dfe9 | 235 | if (gid_pn_resp->ct_hdr.ct_cmd != FC_FS_ACC) |
5ab944f9 | 236 | return; |
a5b11dda | 237 | |
24073b47 | 238 | /* paranoia */ |
dbf5dfe9 | 239 | if (gid_pn_req->gid_pn.fn_wwpn != port->wwpn) |
5ab944f9 | 240 | return; |
24073b47 | 241 | /* looks like a valid d_id */ |
dbf5dfe9 | 242 | port->d_id = ntoh24(gid_pn_resp->gid_pn.fp_fid); |
24073b47 CS |
243 | } |
244 | ||
799b76d0 | 245 | static int zfcp_fc_ns_gid_pn_request(struct zfcp_port *port, |
dbf5dfe9 | 246 | struct zfcp_fc_gid_pn *gid_pn) |
24073b47 | 247 | { |
799b76d0 | 248 | struct zfcp_adapter *adapter = port->adapter; |
5ab944f9 SS |
249 | struct zfcp_fc_ns_handler_data compl_rec; |
250 | int ret; | |
24073b47 CS |
251 | |
252 | /* setup parameters for send generic command */ | |
799b76d0 | 253 | gid_pn->port = port; |
9d544f2b | 254 | gid_pn->ct.wka_port = &adapter->gs->ds; |
5ab944f9 SS |
255 | gid_pn->ct.handler = zfcp_fc_ns_handler; |
256 | gid_pn->ct.handler_data = (unsigned long) &compl_rec; | |
dbf5dfe9 CS |
257 | gid_pn->ct.req = &gid_pn->sg_req; |
258 | gid_pn->ct.resp = &gid_pn->sg_resp; | |
259 | sg_init_one(&gid_pn->sg_req, &gid_pn->gid_pn_req, | |
260 | sizeof(struct zfcp_fc_gid_pn_req)); | |
261 | sg_init_one(&gid_pn->sg_resp, &gid_pn->gid_pn_resp, | |
262 | sizeof(struct zfcp_fc_gid_pn_resp)); | |
24073b47 CS |
263 | |
264 | /* setup nameserver request */ | |
dbf5dfe9 CS |
265 | gid_pn->gid_pn_req.ct_hdr.ct_rev = FC_CT_REV; |
266 | gid_pn->gid_pn_req.ct_hdr.ct_fs_type = FC_FST_DIR; | |
267 | gid_pn->gid_pn_req.ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; | |
268 | gid_pn->gid_pn_req.ct_hdr.ct_options = 0; | |
269 | gid_pn->gid_pn_req.ct_hdr.ct_cmd = FC_NS_GID_PN; | |
270 | gid_pn->gid_pn_req.ct_hdr.ct_mr_size = ZFCP_FC_CT_SIZE_PAGE / 4; | |
271 | gid_pn->gid_pn_req.gid_pn.fn_wwpn = port->wwpn; | |
24073b47 | 272 | |
5ab944f9 SS |
273 | init_completion(&compl_rec.done); |
274 | compl_rec.handler = zfcp_fc_ns_gid_pn_eval; | |
275 | compl_rec.handler_data = (unsigned long) gid_pn; | |
799b76d0 | 276 | ret = zfcp_fsf_send_ct(&gid_pn->ct, adapter->pool.gid_pn_req); |
5ab944f9 SS |
277 | if (!ret) |
278 | wait_for_completion(&compl_rec.done); | |
279 | return ret; | |
280 | } | |
281 | ||
282 | /** | |
283 | * zfcp_fc_ns_gid_pn_request - initiate GID_PN nameserver request | |
799b76d0 | 284 | * @port: port where GID_PN request is needed |
5ab944f9 SS |
285 | * return: -ENOMEM on error, 0 otherwise |
286 | */ | |
799b76d0 | 287 | static int zfcp_fc_ns_gid_pn(struct zfcp_port *port) |
5ab944f9 SS |
288 | { |
289 | int ret; | |
dbf5dfe9 | 290 | struct zfcp_fc_gid_pn *gid_pn; |
799b76d0 | 291 | struct zfcp_adapter *adapter = port->adapter; |
5ab944f9 | 292 | |
dbf5dfe9 | 293 | gid_pn = mempool_alloc(adapter->pool.gid_pn, GFP_ATOMIC); |
5ab944f9 SS |
294 | if (!gid_pn) |
295 | return -ENOMEM; | |
296 | ||
297 | memset(gid_pn, 0, sizeof(*gid_pn)); | |
298 | ||
6f53a2d2 | 299 | ret = zfcp_fc_wka_port_get(&adapter->gs->ds); |
24073b47 | 300 | if (ret) |
5ab944f9 SS |
301 | goto out; |
302 | ||
799b76d0 | 303 | ret = zfcp_fc_ns_gid_pn_request(port, gid_pn); |
5ab944f9 | 304 | |
6f53a2d2 | 305 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
5ab944f9 | 306 | out: |
dbf5dfe9 | 307 | mempool_free(gid_pn, adapter->pool.gid_pn); |
24073b47 CS |
308 | return ret; |
309 | } | |
310 | ||
799b76d0 CS |
311 | void zfcp_fc_port_did_lookup(struct work_struct *work) |
312 | { | |
313 | int ret; | |
314 | struct zfcp_port *port = container_of(work, struct zfcp_port, | |
315 | gid_pn_work); | |
316 | ||
317 | ret = zfcp_fc_ns_gid_pn(port); | |
318 | if (ret) { | |
319 | /* could not issue gid_pn for some reason */ | |
320 | zfcp_erp_adapter_reopen(port->adapter, 0, "fcgpn_1", NULL); | |
321 | goto out; | |
322 | } | |
323 | ||
324 | if (!port->d_id) { | |
325 | zfcp_erp_port_failed(port, "fcgpn_2", NULL); | |
326 | goto out; | |
327 | } | |
328 | ||
329 | zfcp_erp_port_reopen(port, 0, "fcgpn_3", NULL); | |
330 | out: | |
f3450c7b | 331 | put_device(&port->sysfs_device); |
799b76d0 CS |
332 | } |
333 | ||
934aeb58 CS |
334 | /** |
335 | * zfcp_fc_trigger_did_lookup - trigger the d_id lookup using a GID_PN request | |
336 | * @port: The zfcp_port to lookup the d_id for. | |
337 | */ | |
338 | void zfcp_fc_trigger_did_lookup(struct zfcp_port *port) | |
339 | { | |
f3450c7b | 340 | get_device(&port->sysfs_device); |
934aeb58 | 341 | if (!queue_work(port->adapter->work_queue, &port->gid_pn_work)) |
f3450c7b | 342 | put_device(&port->sysfs_device); |
934aeb58 CS |
343 | } |
344 | ||
24073b47 CS |
345 | /** |
346 | * zfcp_fc_plogi_evaluate - evaluate PLOGI playload | |
347 | * @port: zfcp_port structure | |
348 | * @plogi: plogi payload | |
349 | * | |
350 | * Evaluate PLOGI playload and copy important fields into zfcp_port structure | |
351 | */ | |
9d05ce2c | 352 | void zfcp_fc_plogi_evaluate(struct zfcp_port *port, struct fc_els_flogi *plogi) |
24073b47 | 353 | { |
9d05ce2c CS |
354 | if (plogi->fl_wwpn != port->wwpn) { |
355 | port->d_id = 0; | |
356 | dev_warn(&port->adapter->ccw_device->dev, | |
357 | "A port opened with WWPN 0x%016Lx returned data that " | |
358 | "identifies it as WWPN 0x%016Lx\n", | |
359 | (unsigned long long) port->wwpn, | |
360 | (unsigned long long) plogi->fl_wwpn); | |
361 | return; | |
362 | } | |
363 | ||
364 | port->wwnn = plogi->fl_wwnn; | |
365 | port->maxframe_size = plogi->fl_csp.sp_bb_data; | |
366 | ||
367 | if (plogi->fl_cssp[0].cp_class & FC_CPC_VALID) | |
24073b47 | 368 | port->supported_classes |= FC_COS_CLASS1; |
9d05ce2c | 369 | if (plogi->fl_cssp[1].cp_class & FC_CPC_VALID) |
24073b47 | 370 | port->supported_classes |= FC_COS_CLASS2; |
9d05ce2c | 371 | if (plogi->fl_cssp[2].cp_class & FC_CPC_VALID) |
24073b47 | 372 | port->supported_classes |= FC_COS_CLASS3; |
9d05ce2c | 373 | if (plogi->fl_cssp[3].cp_class & FC_CPC_VALID) |
24073b47 CS |
374 | port->supported_classes |= FC_COS_CLASS4; |
375 | } | |
376 | ||
24073b47 CS |
377 | static void zfcp_fc_adisc_handler(unsigned long data) |
378 | { | |
9d05ce2c | 379 | struct zfcp_fc_els_adisc *adisc = (struct zfcp_fc_els_adisc *) data; |
24073b47 | 380 | struct zfcp_port *port = adisc->els.port; |
9d05ce2c | 381 | struct fc_els_adisc *adisc_resp = &adisc->adisc_resp; |
24073b47 | 382 | |
3968ce80 | 383 | if (adisc->els.status) { |
24073b47 | 384 | /* request rejected or timed out */ |
5b43e719 SS |
385 | zfcp_erp_port_forced_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
386 | "fcadh_1", NULL); | |
24073b47 CS |
387 | goto out; |
388 | } | |
389 | ||
390 | if (!port->wwnn) | |
9d05ce2c | 391 | port->wwnn = adisc_resp->adisc_wwnn; |
24073b47 | 392 | |
9d05ce2c | 393 | if ((port->wwpn != adisc_resp->adisc_wwpn) || |
a2fa0aed | 394 | !(atomic_read(&port->status) & ZFCP_STATUS_COMMON_OPEN)) { |
24095490 SS |
395 | zfcp_erp_port_reopen(port, ZFCP_STATUS_COMMON_ERP_FAILED, |
396 | "fcadh_2", NULL); | |
a2fa0aed CS |
397 | goto out; |
398 | } | |
24073b47 | 399 | |
a2fa0aed CS |
400 | /* port is good, unblock rport without going through erp */ |
401 | zfcp_scsi_schedule_rport_register(port); | |
24073b47 | 402 | out: |
14e242ea | 403 | atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
f3450c7b | 404 | put_device(&port->sysfs_device); |
24073b47 CS |
405 | kfree(adisc); |
406 | } | |
407 | ||
408 | static int zfcp_fc_adisc(struct zfcp_port *port) | |
409 | { | |
9d05ce2c | 410 | struct zfcp_fc_els_adisc *adisc; |
24073b47 CS |
411 | struct zfcp_adapter *adapter = port->adapter; |
412 | ||
9d05ce2c | 413 | adisc = kzalloc(sizeof(struct zfcp_fc_els_adisc), GFP_ATOMIC); |
24073b47 CS |
414 | if (!adisc) |
415 | return -ENOMEM; | |
416 | ||
417 | adisc->els.req = &adisc->req; | |
418 | adisc->els.resp = &adisc->resp; | |
9d05ce2c CS |
419 | sg_init_one(adisc->els.req, &adisc->adisc_req, |
420 | sizeof(struct fc_els_adisc)); | |
421 | sg_init_one(adisc->els.resp, &adisc->adisc_resp, | |
422 | sizeof(struct fc_els_adisc)); | |
24073b47 | 423 | |
24073b47 CS |
424 | adisc->els.adapter = adapter; |
425 | adisc->els.port = port; | |
426 | adisc->els.d_id = port->d_id; | |
427 | adisc->els.handler = zfcp_fc_adisc_handler; | |
428 | adisc->els.handler_data = (unsigned long) adisc; | |
9d05ce2c | 429 | adisc->els.ls_code = adisc->adisc_req.adisc_cmd = ELS_ADISC; |
24073b47 CS |
430 | |
431 | /* acc. to FC-FS, hard_nport_id in ADISC should not be set for ports | |
432 | without FC-AL-2 capability, so we don't set it */ | |
9d05ce2c CS |
433 | adisc->adisc_req.adisc_wwpn = fc_host_port_name(adapter->scsi_host); |
434 | adisc->adisc_req.adisc_wwnn = fc_host_node_name(adapter->scsi_host); | |
435 | hton24(adisc->adisc_req.adisc_port_id, | |
436 | fc_host_port_id(adapter->scsi_host)); | |
24073b47 CS |
437 | |
438 | return zfcp_fsf_send_els(&adisc->els); | |
439 | } | |
440 | ||
8fdf30d5 | 441 | void zfcp_fc_link_test_work(struct work_struct *work) |
24073b47 | 442 | { |
8fdf30d5 CS |
443 | struct zfcp_port *port = |
444 | container_of(work, struct zfcp_port, test_link_work); | |
24073b47 CS |
445 | int retval; |
446 | ||
f3450c7b | 447 | get_device(&port->sysfs_device); |
a2fa0aed CS |
448 | port->rport_task = RPORT_DEL; |
449 | zfcp_scsi_rport_work(&port->rport_work); | |
450 | ||
14e242ea CS |
451 | /* only issue one test command at one time per port */ |
452 | if (atomic_read(&port->status) & ZFCP_STATUS_PORT_LINK_TEST) | |
453 | goto out; | |
454 | ||
455 | atomic_set_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); | |
456 | ||
24073b47 | 457 | retval = zfcp_fc_adisc(port); |
9528539c | 458 | if (retval == 0) |
24073b47 CS |
459 | return; |
460 | ||
461 | /* send of ADISC was not possible */ | |
14e242ea | 462 | atomic_clear_mask(ZFCP_STATUS_PORT_LINK_TEST, &port->status); |
a2fa0aed CS |
463 | zfcp_erp_port_forced_reopen(port, 0, "fcltwk1", NULL); |
464 | ||
14e242ea | 465 | out: |
f3450c7b | 466 | put_device(&port->sysfs_device); |
24073b47 | 467 | } |
cc8c2829 | 468 | |
8fdf30d5 | 469 | /** |
6f53a2d2 | 470 | * zfcp_fc_test_link - lightweight link test procedure |
8fdf30d5 CS |
471 | * @port: port to be tested |
472 | * | |
473 | * Test status of a link to a remote port using the ELS command ADISC. | |
474 | * If there is a problem with the remote port, error recovery steps | |
475 | * will be triggered. | |
476 | */ | |
6f53a2d2 | 477 | void zfcp_fc_test_link(struct zfcp_port *port) |
8fdf30d5 | 478 | { |
f3450c7b | 479 | get_device(&port->sysfs_device); |
4544683a | 480 | if (!queue_work(port->adapter->work_queue, &port->test_link_work)) |
f3450c7b | 481 | put_device(&port->sysfs_device); |
8fdf30d5 CS |
482 | } |
483 | ||
dbf5dfe9 | 484 | static void zfcp_free_sg_env(struct zfcp_fc_gpn_ft *gpn_ft, int buf_num) |
cc8c2829 SS |
485 | { |
486 | struct scatterlist *sg = &gpn_ft->sg_req; | |
487 | ||
a4623c46 | 488 | kmem_cache_free(zfcp_data.gpn_ft_cache, sg_virt(sg)); |
39eb7e9a | 489 | zfcp_sg_free_table(gpn_ft->sg_resp, buf_num); |
cc8c2829 SS |
490 | |
491 | kfree(gpn_ft); | |
492 | } | |
493 | ||
dbf5dfe9 | 494 | static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) |
cc8c2829 | 495 | { |
dbf5dfe9 CS |
496 | struct zfcp_fc_gpn_ft *gpn_ft; |
497 | struct zfcp_fc_gpn_ft_req *req; | |
cc8c2829 SS |
498 | |
499 | gpn_ft = kzalloc(sizeof(*gpn_ft), GFP_KERNEL); | |
500 | if (!gpn_ft) | |
501 | return NULL; | |
502 | ||
a4623c46 | 503 | req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); |
cc8c2829 SS |
504 | if (!req) { |
505 | kfree(gpn_ft); | |
506 | gpn_ft = NULL; | |
507 | goto out; | |
508 | } | |
509 | sg_init_one(&gpn_ft->sg_req, req, sizeof(*req)); | |
510 | ||
39eb7e9a CS |
511 | if (zfcp_sg_setup_table(gpn_ft->sg_resp, buf_num)) { |
512 | zfcp_free_sg_env(gpn_ft, buf_num); | |
cc8c2829 SS |
513 | gpn_ft = NULL; |
514 | } | |
515 | out: | |
516 | return gpn_ft; | |
517 | } | |
518 | ||
519 | ||
dbf5dfe9 | 520 | static int zfcp_fc_send_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, |
6f53a2d2 | 521 | struct zfcp_adapter *adapter, int max_bytes) |
cc8c2829 SS |
522 | { |
523 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
dbf5dfe9 | 524 | struct zfcp_fc_gpn_ft_req *req = sg_virt(&gpn_ft->sg_req); |
5ab944f9 | 525 | struct zfcp_fc_ns_handler_data compl_rec; |
cc8c2829 SS |
526 | int ret; |
527 | ||
528 | /* prepare CT IU for GPN_FT */ | |
dbf5dfe9 CS |
529 | req->ct_hdr.ct_rev = FC_CT_REV; |
530 | req->ct_hdr.ct_fs_type = FC_FST_DIR; | |
531 | req->ct_hdr.ct_fs_subtype = FC_NS_SUBTYPE; | |
532 | req->ct_hdr.ct_options = 0; | |
533 | req->ct_hdr.ct_cmd = FC_NS_GPN_FT; | |
534 | req->ct_hdr.ct_mr_size = max_bytes / 4; | |
535 | req->gpn_ft.fn_domain_id_scope = 0; | |
536 | req->gpn_ft.fn_area_id_scope = 0; | |
537 | req->gpn_ft.fn_fc4_type = FC_TYPE_FCP; | |
cc8c2829 SS |
538 | |
539 | /* prepare zfcp_send_ct */ | |
9d544f2b | 540 | ct->wka_port = &adapter->gs->ds; |
5ab944f9 SS |
541 | ct->handler = zfcp_fc_ns_handler; |
542 | ct->handler_data = (unsigned long)&compl_rec; | |
cc8c2829 SS |
543 | ct->req = &gpn_ft->sg_req; |
544 | ct->resp = gpn_ft->sg_resp; | |
cc8c2829 | 545 | |
5ab944f9 SS |
546 | init_completion(&compl_rec.done); |
547 | compl_rec.handler = NULL; | |
799b76d0 | 548 | ret = zfcp_fsf_send_ct(ct, NULL); |
cc8c2829 | 549 | if (!ret) |
5ab944f9 | 550 | wait_for_completion(&compl_rec.done); |
cc8c2829 SS |
551 | return ret; |
552 | } | |
553 | ||
f3450c7b | 554 | static void zfcp_fc_validate_port(struct zfcp_port *port, struct list_head *lh) |
cc8c2829 | 555 | { |
6ab35c07 MP |
556 | if (!(atomic_read(&port->status) & ZFCP_STATUS_COMMON_NOESC)) |
557 | return; | |
558 | ||
cc8c2829 SS |
559 | atomic_clear_mask(ZFCP_STATUS_COMMON_NOESC, &port->status); |
560 | ||
0406289e | 561 | if ((port->supported_classes != 0) || |
f3450c7b | 562 | !list_empty(&port->unit_list)) |
cc8c2829 | 563 | return; |
f3450c7b | 564 | |
f3450c7b | 565 | list_move_tail(&port->list, lh); |
cc8c2829 SS |
566 | } |
567 | ||
dbf5dfe9 | 568 | static int zfcp_fc_eval_gpn_ft(struct zfcp_fc_gpn_ft *gpn_ft, int max_entries) |
cc8c2829 SS |
569 | { |
570 | struct zfcp_send_ct *ct = &gpn_ft->ct; | |
571 | struct scatterlist *sg = gpn_ft->sg_resp; | |
dbf5dfe9 CS |
572 | struct fc_ct_hdr *hdr = sg_virt(sg); |
573 | struct fc_gpn_ft_resp *acc = sg_virt(sg); | |
5ab944f9 | 574 | struct zfcp_adapter *adapter = ct->wka_port->adapter; |
cc8c2829 | 575 | struct zfcp_port *port, *tmp; |
ecf0c772 | 576 | unsigned long flags; |
f3450c7b | 577 | LIST_HEAD(remove_lh); |
cc8c2829 | 578 | u32 d_id; |
47f7bba5 | 579 | int ret = 0, x, last = 0; |
cc8c2829 SS |
580 | |
581 | if (ct->status) | |
582 | return -EIO; | |
583 | ||
dbf5dfe9 CS |
584 | if (hdr->ct_cmd != FC_FS_ACC) { |
585 | if (hdr->ct_reason == FC_BA_RJT_UNABLE) | |
cc8c2829 SS |
586 | return -EAGAIN; /* might be a temporary condition */ |
587 | return -EIO; | |
588 | } | |
589 | ||
dbf5dfe9 | 590 | if (hdr->ct_mr_size) { |
39eb7e9a CS |
591 | dev_warn(&adapter->ccw_device->dev, |
592 | "The name server reported %d words residual data\n", | |
dbf5dfe9 | 593 | hdr->ct_mr_size); |
cc8c2829 | 594 | return -E2BIG; |
39eb7e9a | 595 | } |
cc8c2829 | 596 | |
cc8c2829 | 597 | /* first entry is the header */ |
39eb7e9a | 598 | for (x = 1; x < max_entries && !last; x++) { |
dbf5dfe9 | 599 | if (x % (ZFCP_FC_GPN_FT_ENT_PAGE + 1)) |
cc8c2829 SS |
600 | acc++; |
601 | else | |
602 | acc = sg_virt(++sg); | |
603 | ||
dbf5dfe9 CS |
604 | last = acc->fp_flags & FC_NS_FID_LAST; |
605 | d_id = ntoh24(acc->fp_fid); | |
cc8c2829 | 606 | |
5ab944f9 | 607 | /* don't attach ports with a well known address */ |
dbf5dfe9 | 608 | if (d_id >= FC_FID_WELL_KNOWN_BASE) |
5ab944f9 | 609 | continue; |
cc8c2829 | 610 | /* skip the adapter's port and known remote ports */ |
dbf5dfe9 | 611 | if (acc->fp_wwpn == fc_host_port_name(adapter->scsi_host)) |
cc8c2829 SS |
612 | continue; |
613 | ||
dbf5dfe9 | 614 | port = zfcp_port_enqueue(adapter, acc->fp_wwpn, |
cc8c2829 | 615 | ZFCP_STATUS_COMMON_NOESC, d_id); |
ecf0c772 | 616 | if (!IS_ERR(port)) |
5ffd51a5 | 617 | zfcp_erp_port_reopen(port, 0, "fcegpf1", NULL); |
ecf0c772 SS |
618 | else if (PTR_ERR(port) != -EEXIST) |
619 | ret = PTR_ERR(port); | |
cc8c2829 SS |
620 | } |
621 | ||
622 | zfcp_erp_wait(adapter); | |
ecf0c772 SS |
623 | write_lock_irqsave(&adapter->port_list_lock, flags); |
624 | list_for_each_entry_safe(port, tmp, &adapter->port_list, list) | |
f3450c7b | 625 | zfcp_fc_validate_port(port, &remove_lh); |
ecf0c772 | 626 | write_unlock_irqrestore(&adapter->port_list_lock, flags); |
f3450c7b SS |
627 | |
628 | list_for_each_entry_safe(port, tmp, &remove_lh, list) { | |
629 | zfcp_erp_port_shutdown(port, 0, "fcegpf2", NULL); | |
630 | zfcp_device_unregister(&port->sysfs_device, | |
631 | &zfcp_sysfs_port_attrs); | |
632 | } | |
633 | ||
cc8c2829 SS |
634 | return ret; |
635 | } | |
636 | ||
637 | /** | |
6f53a2d2 | 638 | * zfcp_fc_scan_ports - scan remote ports and attach new ports |
9eae07ef | 639 | * @work: reference to scheduled work |
cc8c2829 | 640 | */ |
9eae07ef | 641 | void zfcp_fc_scan_ports(struct work_struct *work) |
cc8c2829 | 642 | { |
9eae07ef SS |
643 | struct zfcp_adapter *adapter = container_of(work, struct zfcp_adapter, |
644 | scan_work); | |
cc8c2829 | 645 | int ret, i; |
dbf5dfe9 | 646 | struct zfcp_fc_gpn_ft *gpn_ft; |
39eb7e9a CS |
647 | int chain, max_entries, buf_num, max_bytes; |
648 | ||
649 | chain = adapter->adapter_features & FSF_FEATURE_ELS_CT_CHAINED_SBALS; | |
dbf5dfe9 CS |
650 | buf_num = chain ? ZFCP_FC_GPN_FT_NUM_BUFS : 1; |
651 | max_entries = chain ? ZFCP_FC_GPN_FT_MAX_ENT : ZFCP_FC_GPN_FT_ENT_PAGE; | |
652 | max_bytes = chain ? ZFCP_FC_GPN_FT_MAX_SIZE : ZFCP_FC_CT_SIZE_PAGE; | |
cc8c2829 | 653 | |
306b6edc SS |
654 | if (fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPORT && |
655 | fc_host_port_type(adapter->scsi_host) != FC_PORTTYPE_NPIV) | |
9eae07ef | 656 | return; |
cc8c2829 | 657 | |
9eae07ef SS |
658 | if (zfcp_fc_wka_port_get(&adapter->gs->ds)) |
659 | return; | |
cc8c2829 | 660 | |
39eb7e9a | 661 | gpn_ft = zfcp_alloc_sg_env(buf_num); |
9eae07ef | 662 | if (!gpn_ft) |
5ab944f9 | 663 | goto out; |
cc8c2829 SS |
664 | |
665 | for (i = 0; i < 3; i++) { | |
6f53a2d2 | 666 | ret = zfcp_fc_send_gpn_ft(gpn_ft, adapter, max_bytes); |
cc8c2829 | 667 | if (!ret) { |
6f53a2d2 | 668 | ret = zfcp_fc_eval_gpn_ft(gpn_ft, max_entries); |
cc8c2829 SS |
669 | if (ret == -EAGAIN) |
670 | ssleep(1); | |
671 | else | |
672 | break; | |
673 | } | |
674 | } | |
39eb7e9a | 675 | zfcp_free_sg_env(gpn_ft, buf_num); |
5ab944f9 | 676 | out: |
6f53a2d2 | 677 | zfcp_fc_wka_port_put(&adapter->gs->ds); |
cc8c2829 SS |
678 | } |
679 | ||
680 | ||
9d544f2b SS |
681 | struct zfcp_els_fc_job { |
682 | struct zfcp_send_els els; | |
683 | struct fc_bsg_job *job; | |
684 | }; | |
685 | ||
686 | static void zfcp_fc_generic_els_handler(unsigned long data) | |
687 | { | |
688 | struct zfcp_els_fc_job *els_fc_job = (struct zfcp_els_fc_job *) data; | |
689 | struct fc_bsg_job *job = els_fc_job->job; | |
690 | struct fc_bsg_reply *reply = job->reply; | |
691 | ||
692 | if (els_fc_job->els.status) { | |
693 | /* request rejected or timed out */ | |
694 | reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_REJECT; | |
695 | goto out; | |
696 | } | |
697 | ||
698 | reply->reply_data.ctels_reply.status = FC_CTELS_STATUS_OK; | |
dc577d55 | 699 | reply->reply_payload_rcv_len = job->reply_payload.payload_len; |
9d544f2b SS |
700 | |
701 | out: | |
702 | job->state_flags = FC_RQST_STATE_DONE; | |
703 | job->job_done(job); | |
704 | kfree(els_fc_job); | |
705 | } | |
706 | ||
707 | int zfcp_fc_execute_els_fc_job(struct fc_bsg_job *job) | |
708 | { | |
709 | struct zfcp_els_fc_job *els_fc_job; | |
710 | struct fc_rport *rport = job->rport; | |
711 | struct Scsi_Host *shost; | |
712 | struct zfcp_adapter *adapter; | |
713 | struct zfcp_port *port; | |
714 | u8 *port_did; | |
715 | ||
716 | shost = rport ? rport_to_shost(rport) : job->shost; | |
717 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; | |
718 | ||
719 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
720 | return -EINVAL; | |
721 | ||
722 | els_fc_job = kzalloc(sizeof(struct zfcp_els_fc_job), GFP_KERNEL); | |
723 | if (!els_fc_job) | |
724 | return -ENOMEM; | |
725 | ||
726 | els_fc_job->els.adapter = adapter; | |
727 | if (rport) { | |
ea945ff8 | 728 | port = zfcp_get_port_by_wwpn(adapter, rport->port_name); |
9d544f2b SS |
729 | if (!port) { |
730 | kfree(els_fc_job); | |
731 | return -EINVAL; | |
732 | } | |
ecf0c772 SS |
733 | |
734 | els_fc_job->els.d_id = port->d_id; | |
f3450c7b | 735 | put_device(&port->sysfs_device); |
9d544f2b SS |
736 | } else { |
737 | port_did = job->request->rqst_data.h_els.port_id; | |
738 | els_fc_job->els.d_id = (port_did[0] << 16) + | |
739 | (port_did[1] << 8) + port_did[2]; | |
740 | } | |
741 | ||
742 | els_fc_job->els.req = job->request_payload.sg_list; | |
743 | els_fc_job->els.resp = job->reply_payload.sg_list; | |
744 | els_fc_job->els.handler = zfcp_fc_generic_els_handler; | |
745 | els_fc_job->els.handler_data = (unsigned long) els_fc_job; | |
746 | els_fc_job->job = job; | |
747 | ||
748 | return zfcp_fsf_send_els(&els_fc_job->els); | |
749 | } | |
750 | ||
751 | struct zfcp_ct_fc_job { | |
752 | struct zfcp_send_ct ct; | |
753 | struct fc_bsg_job *job; | |
754 | }; | |
755 | ||
756 | static void zfcp_fc_generic_ct_handler(unsigned long data) | |
757 | { | |
758 | struct zfcp_ct_fc_job *ct_fc_job = (struct zfcp_ct_fc_job *) data; | |
759 | struct fc_bsg_job *job = ct_fc_job->job; | |
760 | ||
761 | job->reply->reply_data.ctels_reply.status = ct_fc_job->ct.status ? | |
762 | FC_CTELS_STATUS_REJECT : FC_CTELS_STATUS_OK; | |
dc577d55 | 763 | job->reply->reply_payload_rcv_len = job->reply_payload.payload_len; |
9d544f2b | 764 | job->state_flags = FC_RQST_STATE_DONE; |
9d544f2b SS |
765 | job->job_done(job); |
766 | ||
6f53a2d2 | 767 | zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); |
9d544f2b SS |
768 | |
769 | kfree(ct_fc_job); | |
770 | } | |
771 | ||
772 | int zfcp_fc_execute_ct_fc_job(struct fc_bsg_job *job) | |
773 | { | |
774 | int ret; | |
775 | u8 gs_type; | |
776 | struct fc_rport *rport = job->rport; | |
777 | struct Scsi_Host *shost; | |
778 | struct zfcp_adapter *adapter; | |
779 | struct zfcp_ct_fc_job *ct_fc_job; | |
780 | u32 preamble_word1; | |
781 | ||
782 | shost = rport ? rport_to_shost(rport) : job->shost; | |
783 | ||
784 | adapter = (struct zfcp_adapter *)shost->hostdata[0]; | |
785 | if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_OPEN)) | |
786 | return -EINVAL; | |
787 | ||
788 | ct_fc_job = kzalloc(sizeof(struct zfcp_ct_fc_job), GFP_KERNEL); | |
789 | if (!ct_fc_job) | |
790 | return -ENOMEM; | |
791 | ||
792 | preamble_word1 = job->request->rqst_data.r_ct.preamble_word1; | |
793 | gs_type = (preamble_word1 & 0xff000000) >> 24; | |
794 | ||
795 | switch (gs_type) { | |
796 | case FC_FST_ALIAS: | |
797 | ct_fc_job->ct.wka_port = &adapter->gs->as; | |
798 | break; | |
799 | case FC_FST_MGMT: | |
800 | ct_fc_job->ct.wka_port = &adapter->gs->ms; | |
801 | break; | |
802 | case FC_FST_TIME: | |
803 | ct_fc_job->ct.wka_port = &adapter->gs->ts; | |
804 | break; | |
805 | case FC_FST_DIR: | |
806 | ct_fc_job->ct.wka_port = &adapter->gs->ds; | |
807 | break; | |
808 | default: | |
809 | kfree(ct_fc_job); | |
810 | return -EINVAL; /* no such service */ | |
811 | } | |
812 | ||
6f53a2d2 | 813 | ret = zfcp_fc_wka_port_get(ct_fc_job->ct.wka_port); |
9d544f2b SS |
814 | if (ret) { |
815 | kfree(ct_fc_job); | |
816 | return ret; | |
817 | } | |
818 | ||
819 | ct_fc_job->ct.req = job->request_payload.sg_list; | |
820 | ct_fc_job->ct.resp = job->reply_payload.sg_list; | |
9d544f2b SS |
821 | ct_fc_job->ct.handler = zfcp_fc_generic_ct_handler; |
822 | ct_fc_job->ct.handler_data = (unsigned long) ct_fc_job; | |
823 | ct_fc_job->ct.completion = NULL; | |
824 | ct_fc_job->job = job; | |
825 | ||
799b76d0 | 826 | ret = zfcp_fsf_send_ct(&ct_fc_job->ct, NULL); |
9d544f2b SS |
827 | if (ret) { |
828 | kfree(ct_fc_job); | |
6f53a2d2 | 829 | zfcp_fc_wka_port_put(ct_fc_job->ct.wka_port); |
9d544f2b SS |
830 | } |
831 | return ret; | |
832 | } | |
d5a282a1 SS |
833 | |
834 | int zfcp_fc_gs_setup(struct zfcp_adapter *adapter) | |
835 | { | |
bd0072ec | 836 | struct zfcp_fc_wka_ports *wka_ports; |
d5a282a1 | 837 | |
bd0072ec | 838 | wka_ports = kzalloc(sizeof(struct zfcp_fc_wka_ports), GFP_KERNEL); |
d5a282a1 SS |
839 | if (!wka_ports) |
840 | return -ENOMEM; | |
841 | ||
842 | adapter->gs = wka_ports; | |
843 | zfcp_fc_wka_port_init(&wka_ports->ms, FC_FID_MGMT_SERV, adapter); | |
844 | zfcp_fc_wka_port_init(&wka_ports->ts, FC_FID_TIME_SERV, adapter); | |
845 | zfcp_fc_wka_port_init(&wka_ports->ds, FC_FID_DIR_SERV, adapter); | |
846 | zfcp_fc_wka_port_init(&wka_ports->as, FC_FID_ALIASES, adapter); | |
d5a282a1 SS |
847 | |
848 | return 0; | |
849 | } | |
850 | ||
851 | void zfcp_fc_gs_destroy(struct zfcp_adapter *adapter) | |
852 | { | |
853 | kfree(adapter->gs); | |
854 | adapter->gs = NULL; | |
855 | } | |
856 |