Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * FiberChannel transport specific attributes exported to sysfs. | |
3 | * | |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
19 | * | |
20 | * ======== | |
21 | * | |
22 | * Copyright (C) 2004-2005 James Smart, Emulex Corporation | |
23 | * Rewrite for host, target, device, and remote port attributes, | |
24 | * statistics, and service functions... | |
25 | * | |
26 | */ | |
27 | #include <linux/module.h> | |
28 | #include <linux/init.h> | |
4e57b681 | 29 | #include <linux/sched.h> /* workqueue stuff, HZ */ |
1da177e4 LT |
30 | #include <scsi/scsi_device.h> |
31 | #include <scsi/scsi_host.h> | |
32 | #include <scsi/scsi_transport.h> | |
33 | #include <scsi/scsi_transport_fc.h> | |
c829c394 | 34 | #include <scsi/scsi_cmnd.h> |
84314fd4 JS |
35 | #include <linux/netlink.h> |
36 | #include <net/netlink.h> | |
37 | #include <scsi/scsi_netlink_fc.h> | |
1da177e4 LT |
38 | #include "scsi_priv.h" |
39 | ||
aedf3497 JS |
40 | static int fc_queue_work(struct Scsi_Host *, struct work_struct *); |
41 | ||
1da177e4 LT |
42 | /* |
43 | * Redefine so that we can have same named attributes in the | |
44 | * sdev/starget/host objects. | |
45 | */ | |
46 | #define FC_CLASS_DEVICE_ATTR(_prefix,_name,_mode,_show,_store) \ | |
47 | struct class_device_attribute class_device_attr_##_prefix##_##_name = \ | |
48 | __ATTR(_name,_mode,_show,_store) | |
49 | ||
50 | #define fc_enum_name_search(title, table_type, table) \ | |
51 | static const char *get_fc_##title##_name(enum table_type table_key) \ | |
52 | { \ | |
53 | int i; \ | |
54 | char *name = NULL; \ | |
55 | \ | |
6391a113 | 56 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
57 | if (table[i].value == table_key) { \ |
58 | name = table[i].name; \ | |
59 | break; \ | |
60 | } \ | |
61 | } \ | |
62 | return name; \ | |
63 | } | |
64 | ||
65 | #define fc_enum_name_match(title, table_type, table) \ | |
66 | static int get_fc_##title##_match(const char *table_key, \ | |
67 | enum table_type *value) \ | |
68 | { \ | |
69 | int i; \ | |
70 | \ | |
6391a113 | 71 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
72 | if (strncmp(table_key, table[i].name, \ |
73 | table[i].matchlen) == 0) { \ | |
74 | *value = table[i].value; \ | |
75 | return 0; /* success */ \ | |
76 | } \ | |
77 | } \ | |
78 | return 1; /* failure */ \ | |
79 | } | |
80 | ||
81 | ||
82 | /* Convert fc_port_type values to ascii string name */ | |
83 | static struct { | |
84 | enum fc_port_type value; | |
85 | char *name; | |
86 | } fc_port_type_names[] = { | |
87 | { FC_PORTTYPE_UNKNOWN, "Unknown" }, | |
88 | { FC_PORTTYPE_OTHER, "Other" }, | |
89 | { FC_PORTTYPE_NOTPRESENT, "Not Present" }, | |
90 | { FC_PORTTYPE_NPORT, "NPort (fabric via point-to-point)" }, | |
91 | { FC_PORTTYPE_NLPORT, "NLPort (fabric via loop)" }, | |
92 | { FC_PORTTYPE_LPORT, "LPort (private loop)" }, | |
93 | { FC_PORTTYPE_PTP, "Point-To-Point (direct nport connection" }, | |
94 | }; | |
95 | fc_enum_name_search(port_type, fc_port_type, fc_port_type_names) | |
96 | #define FC_PORTTYPE_MAX_NAMELEN 50 | |
97 | ||
98 | ||
84314fd4 JS |
99 | /* Convert fc_host_event_code values to ascii string name */ |
100 | static const struct { | |
101 | enum fc_host_event_code value; | |
102 | char *name; | |
103 | } fc_host_event_code_names[] = { | |
104 | { FCH_EVT_LIP, "lip" }, | |
105 | { FCH_EVT_LINKUP, "link_up" }, | |
106 | { FCH_EVT_LINKDOWN, "link_down" }, | |
107 | { FCH_EVT_LIPRESET, "lip_reset" }, | |
108 | { FCH_EVT_RSCN, "rscn" }, | |
109 | { FCH_EVT_ADAPTER_CHANGE, "adapter_chg" }, | |
110 | { FCH_EVT_PORT_UNKNOWN, "port_unknown" }, | |
111 | { FCH_EVT_PORT_ONLINE, "port_online" }, | |
112 | { FCH_EVT_PORT_OFFLINE, "port_offline" }, | |
113 | { FCH_EVT_PORT_FABRIC, "port_fabric" }, | |
114 | { FCH_EVT_LINK_UNKNOWN, "link_unknown" }, | |
115 | { FCH_EVT_VENDOR_UNIQUE, "vendor_unique" }, | |
116 | }; | |
117 | fc_enum_name_search(host_event_code, fc_host_event_code, | |
118 | fc_host_event_code_names) | |
119 | #define FC_HOST_EVENT_CODE_MAX_NAMELEN 30 | |
120 | ||
121 | ||
1da177e4 LT |
122 | /* Convert fc_port_state values to ascii string name */ |
123 | static struct { | |
124 | enum fc_port_state value; | |
125 | char *name; | |
126 | } fc_port_state_names[] = { | |
127 | { FC_PORTSTATE_UNKNOWN, "Unknown" }, | |
128 | { FC_PORTSTATE_NOTPRESENT, "Not Present" }, | |
129 | { FC_PORTSTATE_ONLINE, "Online" }, | |
130 | { FC_PORTSTATE_OFFLINE, "Offline" }, | |
131 | { FC_PORTSTATE_BLOCKED, "Blocked" }, | |
132 | { FC_PORTSTATE_BYPASSED, "Bypassed" }, | |
133 | { FC_PORTSTATE_DIAGNOSTICS, "Diagnostics" }, | |
134 | { FC_PORTSTATE_LINKDOWN, "Linkdown" }, | |
135 | { FC_PORTSTATE_ERROR, "Error" }, | |
136 | { FC_PORTSTATE_LOOPBACK, "Loopback" }, | |
42e33148 | 137 | { FC_PORTSTATE_DELETED, "Deleted" }, |
1da177e4 LT |
138 | }; |
139 | fc_enum_name_search(port_state, fc_port_state, fc_port_state_names) | |
140 | #define FC_PORTSTATE_MAX_NAMELEN 20 | |
141 | ||
142 | ||
143 | /* Convert fc_tgtid_binding_type values to ascii string name */ | |
0ad78200 | 144 | static const struct { |
1da177e4 LT |
145 | enum fc_tgtid_binding_type value; |
146 | char *name; | |
147 | int matchlen; | |
148 | } fc_tgtid_binding_type_names[] = { | |
149 | { FC_TGTID_BIND_NONE, "none", 4 }, | |
150 | { FC_TGTID_BIND_BY_WWPN, "wwpn (World Wide Port Name)", 4 }, | |
151 | { FC_TGTID_BIND_BY_WWNN, "wwnn (World Wide Node Name)", 4 }, | |
152 | { FC_TGTID_BIND_BY_ID, "port_id (FC Address)", 7 }, | |
153 | }; | |
154 | fc_enum_name_search(tgtid_bind_type, fc_tgtid_binding_type, | |
155 | fc_tgtid_binding_type_names) | |
156 | fc_enum_name_match(tgtid_bind_type, fc_tgtid_binding_type, | |
157 | fc_tgtid_binding_type_names) | |
158 | #define FC_BINDTYPE_MAX_NAMELEN 30 | |
159 | ||
160 | ||
161 | #define fc_bitfield_name_search(title, table) \ | |
162 | static ssize_t \ | |
163 | get_fc_##title##_names(u32 table_key, char *buf) \ | |
164 | { \ | |
165 | char *prefix = ""; \ | |
166 | ssize_t len = 0; \ | |
167 | int i; \ | |
168 | \ | |
6391a113 | 169 | for (i = 0; i < ARRAY_SIZE(table); i++) { \ |
1da177e4 LT |
170 | if (table[i].value & table_key) { \ |
171 | len += sprintf(buf + len, "%s%s", \ | |
172 | prefix, table[i].name); \ | |
173 | prefix = ", "; \ | |
174 | } \ | |
175 | } \ | |
176 | len += sprintf(buf + len, "\n"); \ | |
177 | return len; \ | |
178 | } | |
179 | ||
180 | ||
181 | /* Convert FC_COS bit values to ascii string name */ | |
0ad78200 | 182 | static const struct { |
1da177e4 LT |
183 | u32 value; |
184 | char *name; | |
185 | } fc_cos_names[] = { | |
186 | { FC_COS_CLASS1, "Class 1" }, | |
187 | { FC_COS_CLASS2, "Class 2" }, | |
188 | { FC_COS_CLASS3, "Class 3" }, | |
189 | { FC_COS_CLASS4, "Class 4" }, | |
190 | { FC_COS_CLASS6, "Class 6" }, | |
191 | }; | |
192 | fc_bitfield_name_search(cos, fc_cos_names) | |
193 | ||
194 | ||
195 | /* Convert FC_PORTSPEED bit values to ascii string name */ | |
0ad78200 | 196 | static const struct { |
1da177e4 LT |
197 | u32 value; |
198 | char *name; | |
199 | } fc_port_speed_names[] = { | |
200 | { FC_PORTSPEED_1GBIT, "1 Gbit" }, | |
201 | { FC_PORTSPEED_2GBIT, "2 Gbit" }, | |
202 | { FC_PORTSPEED_4GBIT, "4 Gbit" }, | |
203 | { FC_PORTSPEED_10GBIT, "10 Gbit" }, | |
204 | { FC_PORTSPEED_NOT_NEGOTIATED, "Not Negotiated" }, | |
205 | }; | |
206 | fc_bitfield_name_search(port_speed, fc_port_speed_names) | |
207 | ||
208 | ||
209 | static int | |
210 | show_fc_fc4s (char *buf, u8 *fc4_list) | |
211 | { | |
212 | int i, len=0; | |
213 | ||
214 | for (i = 0; i < FC_FC4_LIST_SIZE; i++, fc4_list++) | |
215 | len += sprintf(buf + len , "0x%02x ", *fc4_list); | |
216 | len += sprintf(buf + len, "\n"); | |
217 | return len; | |
218 | } | |
219 | ||
220 | ||
221 | /* Convert FC_RPORT_ROLE bit values to ascii string name */ | |
0ad78200 | 222 | static const struct { |
1da177e4 LT |
223 | u32 value; |
224 | char *name; | |
225 | } fc_remote_port_role_names[] = { | |
226 | { FC_RPORT_ROLE_FCP_TARGET, "FCP Target" }, | |
227 | { FC_RPORT_ROLE_FCP_INITIATOR, "FCP Initiator" }, | |
228 | { FC_RPORT_ROLE_IP_PORT, "IP Port" }, | |
229 | }; | |
230 | fc_bitfield_name_search(remote_port_roles, fc_remote_port_role_names) | |
231 | ||
232 | /* | |
233 | * Define roles that are specific to port_id. Values are relative to ROLE_MASK. | |
234 | */ | |
235 | #define FC_WELLKNOWN_PORTID_MASK 0xfffff0 | |
236 | #define FC_WELLKNOWN_ROLE_MASK 0x00000f | |
237 | #define FC_FPORT_PORTID 0x00000e | |
238 | #define FC_FABCTLR_PORTID 0x00000d | |
239 | #define FC_DIRSRVR_PORTID 0x00000c | |
240 | #define FC_TIMESRVR_PORTID 0x00000b | |
241 | #define FC_MGMTSRVR_PORTID 0x00000a | |
242 | ||
243 | ||
19a7b4ae | 244 | static void fc_timeout_deleted_rport(void *data); |
0f29b966 | 245 | static void fc_timeout_fail_rport_io(void *data); |
1da177e4 | 246 | static void fc_scsi_scan_rport(void *data); |
1da177e4 LT |
247 | |
248 | /* | |
249 | * Attribute counts pre object type... | |
250 | * Increase these values if you add attributes | |
251 | */ | |
252 | #define FC_STARGET_NUM_ATTRS 3 | |
0f29b966 | 253 | #define FC_RPORT_NUM_ATTRS 10 |
ad139a2f | 254 | #define FC_HOST_NUM_ATTRS 17 |
1da177e4 LT |
255 | |
256 | struct fc_internal { | |
257 | struct scsi_transport_template t; | |
258 | struct fc_function_template *f; | |
259 | ||
260 | /* | |
261 | * For attributes : each object has : | |
262 | * An array of the actual attributes structures | |
263 | * An array of null-terminated pointers to the attribute | |
264 | * structures - used for mid-layer interaction. | |
265 | * | |
266 | * The attribute containers for the starget and host are are | |
267 | * part of the midlayer. As the remote port is specific to the | |
268 | * fc transport, we must provide the attribute container. | |
269 | */ | |
270 | struct class_device_attribute private_starget_attrs[ | |
271 | FC_STARGET_NUM_ATTRS]; | |
272 | struct class_device_attribute *starget_attrs[FC_STARGET_NUM_ATTRS + 1]; | |
273 | ||
274 | struct class_device_attribute private_host_attrs[FC_HOST_NUM_ATTRS]; | |
275 | struct class_device_attribute *host_attrs[FC_HOST_NUM_ATTRS + 1]; | |
276 | ||
277 | struct transport_container rport_attr_cont; | |
278 | struct class_device_attribute private_rport_attrs[FC_RPORT_NUM_ATTRS]; | |
279 | struct class_device_attribute *rport_attrs[FC_RPORT_NUM_ATTRS + 1]; | |
280 | }; | |
281 | ||
282 | #define to_fc_internal(tmpl) container_of(tmpl, struct fc_internal, t) | |
283 | ||
d0a7e574 JB |
284 | static int fc_target_setup(struct transport_container *tc, struct device *dev, |
285 | struct class_device *cdev) | |
1da177e4 LT |
286 | { |
287 | struct scsi_target *starget = to_scsi_target(dev); | |
288 | struct fc_rport *rport = starget_to_rport(starget); | |
289 | ||
290 | /* | |
291 | * if parent is remote port, use values from remote port. | |
292 | * Otherwise, this host uses the fc_transport, but not the | |
293 | * remote port interface. As such, initialize to known non-values. | |
294 | */ | |
295 | if (rport) { | |
296 | fc_starget_node_name(starget) = rport->node_name; | |
297 | fc_starget_port_name(starget) = rport->port_name; | |
298 | fc_starget_port_id(starget) = rport->port_id; | |
299 | } else { | |
300 | fc_starget_node_name(starget) = -1; | |
301 | fc_starget_port_name(starget) = -1; | |
302 | fc_starget_port_id(starget) = -1; | |
303 | } | |
304 | ||
305 | return 0; | |
306 | } | |
307 | ||
308 | static DECLARE_TRANSPORT_CLASS(fc_transport_class, | |
309 | "fc_transport", | |
310 | fc_target_setup, | |
311 | NULL, | |
312 | NULL); | |
313 | ||
d0a7e574 JB |
314 | static int fc_host_setup(struct transport_container *tc, struct device *dev, |
315 | struct class_device *cdev) | |
1da177e4 LT |
316 | { |
317 | struct Scsi_Host *shost = dev_to_shost(dev); | |
aedf3497 | 318 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
319 | |
320 | /* | |
321 | * Set default values easily detected by the midlayer as | |
322 | * failure cases. The scsi lldd is responsible for initializing | |
323 | * all transport attributes to valid values per host. | |
324 | */ | |
aedf3497 JS |
325 | fc_host->node_name = -1; |
326 | fc_host->port_name = -1; | |
327 | fc_host->permanent_port_name = -1; | |
328 | fc_host->supported_classes = FC_COS_UNSPECIFIED; | |
329 | memset(fc_host->supported_fc4s, 0, | |
330 | sizeof(fc_host->supported_fc4s)); | |
aedf3497 JS |
331 | fc_host->supported_speeds = FC_PORTSPEED_UNKNOWN; |
332 | fc_host->maxframe_size = -1; | |
333 | memset(fc_host->serial_number, 0, | |
334 | sizeof(fc_host->serial_number)); | |
335 | ||
336 | fc_host->port_id = -1; | |
337 | fc_host->port_type = FC_PORTTYPE_UNKNOWN; | |
338 | fc_host->port_state = FC_PORTSTATE_UNKNOWN; | |
339 | memset(fc_host->active_fc4s, 0, | |
340 | sizeof(fc_host->active_fc4s)); | |
341 | fc_host->speed = FC_PORTSPEED_UNKNOWN; | |
342 | fc_host->fabric_name = -1; | |
b8d08210 JS |
343 | memset(fc_host->symbolic_name, 0, sizeof(fc_host->symbolic_name)); |
344 | memset(fc_host->system_hostname, 0, sizeof(fc_host->system_hostname)); | |
aedf3497 JS |
345 | |
346 | fc_host->tgtid_bind_type = FC_TGTID_BIND_BY_WWPN; | |
347 | ||
348 | INIT_LIST_HEAD(&fc_host->rports); | |
349 | INIT_LIST_HEAD(&fc_host->rport_bindings); | |
350 | fc_host->next_rport_number = 0; | |
351 | fc_host->next_target_id = 0; | |
352 | ||
353 | snprintf(fc_host->work_q_name, KOBJ_NAME_LEN, "fc_wq_%d", | |
354 | shost->host_no); | |
355 | fc_host->work_q = create_singlethread_workqueue( | |
356 | fc_host->work_q_name); | |
357 | if (!fc_host->work_q) | |
358 | return -ENOMEM; | |
359 | ||
360 | snprintf(fc_host->devloss_work_q_name, KOBJ_NAME_LEN, "fc_dl_%d", | |
361 | shost->host_no); | |
362 | fc_host->devloss_work_q = create_singlethread_workqueue( | |
363 | fc_host->devloss_work_q_name); | |
364 | if (!fc_host->devloss_work_q) { | |
365 | destroy_workqueue(fc_host->work_q); | |
366 | fc_host->work_q = NULL; | |
367 | return -ENOMEM; | |
368 | } | |
369 | ||
1da177e4 LT |
370 | return 0; |
371 | } | |
372 | ||
373 | static DECLARE_TRANSPORT_CLASS(fc_host_class, | |
374 | "fc_host", | |
375 | fc_host_setup, | |
376 | NULL, | |
377 | NULL); | |
378 | ||
379 | /* | |
380 | * Setup and Remove actions for remote ports are handled | |
381 | * in the service functions below. | |
382 | */ | |
383 | static DECLARE_TRANSPORT_CLASS(fc_rport_class, | |
384 | "fc_remote_ports", | |
385 | NULL, | |
386 | NULL, | |
387 | NULL); | |
388 | ||
389 | /* | |
390 | * Module Parameters | |
391 | */ | |
392 | ||
393 | /* | |
394 | * dev_loss_tmo: the default number of seconds that the FC transport | |
395 | * should insulate the loss of a remote port. | |
396 | * The maximum will be capped by the value of SCSI_DEVICE_BLOCK_MAX_TIMEOUT. | |
397 | */ | |
1c9e16e4 | 398 | static unsigned int fc_dev_loss_tmo = 60; /* seconds */ |
1da177e4 LT |
399 | |
400 | module_param_named(dev_loss_tmo, fc_dev_loss_tmo, int, S_IRUGO|S_IWUSR); | |
401 | MODULE_PARM_DESC(dev_loss_tmo, | |
402 | "Maximum number of seconds that the FC transport should" | |
403 | " insulate the loss of a remote port. Once this value is" | |
404 | " exceeded, the scsi target is removed. Value should be" | |
405 | " between 1 and SCSI_DEVICE_BLOCK_MAX_TIMEOUT."); | |
406 | ||
84314fd4 JS |
407 | /** |
408 | * Netlink Infrastructure | |
409 | **/ | |
410 | ||
411 | static atomic_t fc_event_seq; | |
412 | ||
413 | /** | |
414 | * fc_get_event_number - Obtain the next sequential FC event number | |
415 | * | |
416 | * Notes: | |
417 | * We could have inline'd this, but it would have required fc_event_seq to | |
418 | * be exposed. For now, live with the subroutine call. | |
419 | * Atomic used to avoid lock/unlock... | |
420 | **/ | |
421 | u32 | |
422 | fc_get_event_number(void) | |
423 | { | |
424 | return atomic_add_return(1, &fc_event_seq); | |
425 | } | |
426 | EXPORT_SYMBOL(fc_get_event_number); | |
427 | ||
428 | ||
429 | /** | |
430 | * fc_host_post_event - called to post an even on an fc_host. | |
431 | * | |
432 | * @shost: host the event occurred on | |
433 | * @event_number: fc event number obtained from get_fc_event_number() | |
434 | * @event_code: fc_host event being posted | |
435 | * @event_data: 32bits of data for the event being posted | |
436 | * | |
437 | * Notes: | |
438 | * This routine assumes no locks are held on entry. | |
439 | **/ | |
440 | void | |
441 | fc_host_post_event(struct Scsi_Host *shost, u32 event_number, | |
442 | enum fc_host_event_code event_code, u32 event_data) | |
443 | { | |
444 | struct sk_buff *skb; | |
445 | struct nlmsghdr *nlh; | |
446 | struct fc_nl_event *event; | |
447 | const char *name; | |
448 | u32 len, skblen; | |
449 | int err; | |
450 | ||
451 | if (!scsi_nl_sock) { | |
452 | err = -ENOENT; | |
453 | goto send_fail; | |
454 | } | |
455 | ||
456 | len = FC_NL_MSGALIGN(sizeof(*event)); | |
457 | skblen = NLMSG_SPACE(len); | |
458 | ||
459 | skb = alloc_skb(skblen, GFP_KERNEL); | |
460 | if (!skb) { | |
461 | err = -ENOBUFS; | |
462 | goto send_fail; | |
463 | } | |
464 | ||
465 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
466 | skblen - sizeof(*nlh), 0); | |
467 | if (!nlh) { | |
468 | err = -ENOBUFS; | |
469 | goto send_fail_skb; | |
470 | } | |
471 | event = NLMSG_DATA(nlh); | |
472 | ||
473 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
474 | FC_NL_ASYNC_EVENT, len); | |
475 | event->seconds = get_seconds(); | |
476 | event->vendor_id = 0; | |
477 | event->host_no = shost->host_no; | |
478 | event->event_datalen = sizeof(u32); /* bytes */ | |
479 | event->event_num = event_number; | |
480 | event->event_code = event_code; | |
481 | event->event_data = event_data; | |
482 | ||
1b73c4bb JB |
483 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
484 | GFP_KERNEL); | |
84314fd4 JS |
485 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
486 | /* nlmsg_multicast already kfree_skb'd */ | |
487 | goto send_fail; | |
488 | ||
489 | return; | |
490 | ||
491 | send_fail_skb: | |
492 | kfree_skb(skb); | |
493 | send_fail: | |
494 | name = get_fc_host_event_code_name(event_code); | |
495 | printk(KERN_WARNING | |
496 | "%s: Dropped Event : host %d %s data 0x%08x - err %d\n", | |
497 | __FUNCTION__, shost->host_no, | |
498 | (name) ? name : "<unknown>", event_data, err); | |
499 | return; | |
500 | } | |
501 | EXPORT_SYMBOL(fc_host_post_event); | |
502 | ||
503 | ||
504 | /** | |
505 | * fc_host_post_vendor_event - called to post a vendor unique event on | |
506 | * a fc_host | |
507 | * | |
508 | * @shost: host the event occurred on | |
509 | * @event_number: fc event number obtained from get_fc_event_number() | |
510 | * @data_len: amount, in bytes, of vendor unique data | |
511 | * @data_buf: pointer to vendor unique data | |
512 | * | |
513 | * Notes: | |
514 | * This routine assumes no locks are held on entry. | |
515 | **/ | |
516 | void | |
517 | fc_host_post_vendor_event(struct Scsi_Host *shost, u32 event_number, | |
f14e2e29 | 518 | u32 data_len, char * data_buf, u64 vendor_id) |
84314fd4 JS |
519 | { |
520 | struct sk_buff *skb; | |
521 | struct nlmsghdr *nlh; | |
522 | struct fc_nl_event *event; | |
523 | u32 len, skblen; | |
524 | int err; | |
525 | ||
526 | if (!scsi_nl_sock) { | |
527 | err = -ENOENT; | |
528 | goto send_vendor_fail; | |
529 | } | |
530 | ||
531 | len = FC_NL_MSGALIGN(sizeof(*event) + data_len); | |
532 | skblen = NLMSG_SPACE(len); | |
533 | ||
534 | skb = alloc_skb(skblen, GFP_KERNEL); | |
535 | if (!skb) { | |
536 | err = -ENOBUFS; | |
537 | goto send_vendor_fail; | |
538 | } | |
539 | ||
540 | nlh = nlmsg_put(skb, 0, 0, SCSI_TRANSPORT_MSG, | |
541 | skblen - sizeof(*nlh), 0); | |
542 | if (!nlh) { | |
543 | err = -ENOBUFS; | |
544 | goto send_vendor_fail_skb; | |
545 | } | |
546 | event = NLMSG_DATA(nlh); | |
547 | ||
548 | INIT_SCSI_NL_HDR(&event->snlh, SCSI_NL_TRANSPORT_FC, | |
549 | FC_NL_ASYNC_EVENT, len); | |
550 | event->seconds = get_seconds(); | |
551 | event->vendor_id = vendor_id; | |
552 | event->host_no = shost->host_no; | |
553 | event->event_datalen = data_len; /* bytes */ | |
554 | event->event_num = event_number; | |
555 | event->event_code = FCH_EVT_VENDOR_UNIQUE; | |
556 | memcpy(&event->event_data, data_buf, data_len); | |
557 | ||
1b73c4bb JB |
558 | err = nlmsg_multicast(scsi_nl_sock, skb, 0, SCSI_NL_GRP_FC_EVENTS, |
559 | GFP_KERNEL); | |
84314fd4 JS |
560 | if (err && (err != -ESRCH)) /* filter no recipient errors */ |
561 | /* nlmsg_multicast already kfree_skb'd */ | |
562 | goto send_vendor_fail; | |
563 | ||
564 | return; | |
565 | ||
566 | send_vendor_fail_skb: | |
567 | kfree_skb(skb); | |
568 | send_vendor_fail: | |
569 | printk(KERN_WARNING | |
570 | "%s: Dropped Event : host %d vendor_unique - err %d\n", | |
571 | __FUNCTION__, shost->host_no, err); | |
572 | return; | |
573 | } | |
574 | EXPORT_SYMBOL(fc_host_post_vendor_event); | |
575 | ||
576 | ||
1da177e4 LT |
577 | |
578 | static __init int fc_transport_init(void) | |
579 | { | |
84314fd4 JS |
580 | int error; |
581 | ||
582 | atomic_set(&fc_event_seq, 0); | |
583 | ||
584 | error = transport_class_register(&fc_host_class); | |
1da177e4 LT |
585 | if (error) |
586 | return error; | |
587 | error = transport_class_register(&fc_rport_class); | |
588 | if (error) | |
589 | return error; | |
590 | return transport_class_register(&fc_transport_class); | |
591 | } | |
592 | ||
593 | static void __exit fc_transport_exit(void) | |
594 | { | |
595 | transport_class_unregister(&fc_transport_class); | |
596 | transport_class_unregister(&fc_rport_class); | |
597 | transport_class_unregister(&fc_host_class); | |
598 | } | |
599 | ||
600 | /* | |
601 | * FC Remote Port Attribute Management | |
602 | */ | |
603 | ||
604 | #define fc_rport_show_function(field, format_string, sz, cast) \ | |
605 | static ssize_t \ | |
606 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
607 | { \ | |
608 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
609 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
610 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
19a7b4ae JSEC |
611 | if ((i->f->get_rport_##field) && \ |
612 | !((rport->port_state == FC_PORTSTATE_BLOCKED) || \ | |
42e33148 | 613 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae | 614 | (rport->port_state == FC_PORTSTATE_NOTPRESENT))) \ |
1da177e4 LT |
615 | i->f->get_rport_##field(rport); \ |
616 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
617 | } | |
618 | ||
619 | #define fc_rport_store_function(field) \ | |
620 | static ssize_t \ | |
621 | store_fc_rport_##field(struct class_device *cdev, const char *buf, \ | |
622 | size_t count) \ | |
623 | { \ | |
624 | int val; \ | |
625 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
626 | struct Scsi_Host *shost = rport_to_shost(rport); \ | |
627 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 628 | char *cp; \ |
19a7b4ae | 629 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || \ |
42e33148 | 630 | (rport->port_state == FC_PORTSTATE_DELETED) || \ |
19a7b4ae JSEC |
631 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) \ |
632 | return -EBUSY; \ | |
0f29b966 JS |
633 | val = simple_strtoul(buf, &cp, 0); \ |
634 | if (*cp && (*cp != '\n')) \ | |
635 | return -EINVAL; \ | |
1da177e4 LT |
636 | i->f->set_rport_##field(rport, val); \ |
637 | return count; \ | |
638 | } | |
639 | ||
640 | #define fc_rport_rd_attr(field, format_string, sz) \ | |
641 | fc_rport_show_function(field, format_string, sz, ) \ | |
642 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
643 | show_fc_rport_##field, NULL) | |
644 | ||
645 | #define fc_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
646 | fc_rport_show_function(field, format_string, sz, (cast)) \ | |
647 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
648 | show_fc_rport_##field, NULL) | |
649 | ||
650 | #define fc_rport_rw_attr(field, format_string, sz) \ | |
651 | fc_rport_show_function(field, format_string, sz, ) \ | |
652 | fc_rport_store_function(field) \ | |
653 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO | S_IWUSR, \ | |
654 | show_fc_rport_##field, \ | |
655 | store_fc_rport_##field) | |
656 | ||
657 | ||
658 | #define fc_private_rport_show_function(field, format_string, sz, cast) \ | |
659 | static ssize_t \ | |
660 | show_fc_rport_##field (struct class_device *cdev, char *buf) \ | |
661 | { \ | |
662 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
663 | return snprintf(buf, sz, format_string, cast rport->field); \ | |
664 | } | |
665 | ||
666 | #define fc_private_rport_rd_attr(field, format_string, sz) \ | |
667 | fc_private_rport_show_function(field, format_string, sz, ) \ | |
668 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
669 | show_fc_rport_##field, NULL) | |
670 | ||
671 | #define fc_private_rport_rd_attr_cast(field, format_string, sz, cast) \ | |
672 | fc_private_rport_show_function(field, format_string, sz, (cast)) \ | |
673 | static FC_CLASS_DEVICE_ATTR(rport, field, S_IRUGO, \ | |
674 | show_fc_rport_##field, NULL) | |
675 | ||
676 | ||
677 | #define fc_private_rport_rd_enum_attr(title, maxlen) \ | |
678 | static ssize_t \ | |
679 | show_fc_rport_##title (struct class_device *cdev, char *buf) \ | |
680 | { \ | |
681 | struct fc_rport *rport = transport_class_to_rport(cdev); \ | |
682 | const char *name; \ | |
683 | name = get_fc_##title##_name(rport->title); \ | |
684 | if (!name) \ | |
685 | return -EINVAL; \ | |
686 | return snprintf(buf, maxlen, "%s\n", name); \ | |
687 | } \ | |
688 | static FC_CLASS_DEVICE_ATTR(rport, title, S_IRUGO, \ | |
689 | show_fc_rport_##title, NULL) | |
690 | ||
691 | ||
692 | #define SETUP_RPORT_ATTRIBUTE_RD(field) \ | |
693 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
694 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
695 | i->private_rport_attrs[count].store = NULL; \ | |
696 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
697 | if (i->f->show_rport_##field) \ | |
698 | count++ | |
699 | ||
700 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(field) \ | |
701 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
702 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
703 | i->private_rport_attrs[count].store = NULL; \ | |
704 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
705 | count++ | |
706 | ||
707 | #define SETUP_RPORT_ATTRIBUTE_RW(field) \ | |
708 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
709 | if (!i->f->set_rport_##field) { \ | |
710 | i->private_rport_attrs[count].attr.mode = S_IRUGO; \ | |
711 | i->private_rport_attrs[count].store = NULL; \ | |
712 | } \ | |
713 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
714 | if (i->f->show_rport_##field) \ | |
715 | count++ | |
716 | ||
0f29b966 JS |
717 | #define SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(field) \ |
718 | { \ | |
719 | i->private_rport_attrs[count] = class_device_attr_rport_##field; \ | |
720 | i->rport_attrs[count] = &i->private_rport_attrs[count]; \ | |
721 | count++; \ | |
722 | } | |
723 | ||
1da177e4 LT |
724 | |
725 | /* The FC Transport Remote Port Attributes: */ | |
726 | ||
727 | /* Fixed Remote Port Attributes */ | |
728 | ||
729 | fc_private_rport_rd_attr(maxframe_size, "%u bytes\n", 20); | |
730 | ||
731 | static ssize_t | |
732 | show_fc_rport_supported_classes (struct class_device *cdev, char *buf) | |
733 | { | |
734 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
735 | if (rport->supported_classes == FC_COS_UNSPECIFIED) | |
736 | return snprintf(buf, 20, "unspecified\n"); | |
737 | return get_fc_cos_names(rport->supported_classes, buf); | |
738 | } | |
739 | static FC_CLASS_DEVICE_ATTR(rport, supported_classes, S_IRUGO, | |
740 | show_fc_rport_supported_classes, NULL); | |
741 | ||
742 | /* Dynamic Remote Port Attributes */ | |
743 | ||
19a7b4ae JSEC |
744 | /* |
745 | * dev_loss_tmo attribute | |
746 | */ | |
747 | fc_rport_show_function(dev_loss_tmo, "%d\n", 20, ) | |
748 | static ssize_t | |
749 | store_fc_rport_dev_loss_tmo(struct class_device *cdev, const char *buf, | |
750 | size_t count) | |
751 | { | |
752 | int val; | |
753 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
754 | struct Scsi_Host *shost = rport_to_shost(rport); | |
755 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
0f29b966 | 756 | char *cp; |
19a7b4ae | 757 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || |
42e33148 | 758 | (rport->port_state == FC_PORTSTATE_DELETED) || |
19a7b4ae JSEC |
759 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) |
760 | return -EBUSY; | |
0f29b966 JS |
761 | val = simple_strtoul(buf, &cp, 0); |
762 | if ((*cp && (*cp != '\n')) || | |
763 | (val < 0) || (val > SCSI_DEVICE_BLOCK_MAX_TIMEOUT)) | |
19a7b4ae JSEC |
764 | return -EINVAL; |
765 | i->f->set_rport_dev_loss_tmo(rport, val); | |
766 | return count; | |
767 | } | |
768 | static FC_CLASS_DEVICE_ATTR(rport, dev_loss_tmo, S_IRUGO | S_IWUSR, | |
769 | show_fc_rport_dev_loss_tmo, store_fc_rport_dev_loss_tmo); | |
1da177e4 LT |
770 | |
771 | ||
772 | /* Private Remote Port Attributes */ | |
773 | ||
774 | fc_private_rport_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
775 | fc_private_rport_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
776 | fc_private_rport_rd_attr(port_id, "0x%06x\n", 20); | |
777 | ||
778 | static ssize_t | |
779 | show_fc_rport_roles (struct class_device *cdev, char *buf) | |
780 | { | |
781 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
782 | ||
783 | /* identify any roles that are port_id specific */ | |
784 | if ((rport->port_id != -1) && | |
785 | (rport->port_id & FC_WELLKNOWN_PORTID_MASK) == | |
786 | FC_WELLKNOWN_PORTID_MASK) { | |
787 | switch (rport->port_id & FC_WELLKNOWN_ROLE_MASK) { | |
788 | case FC_FPORT_PORTID: | |
789 | return snprintf(buf, 30, "Fabric Port\n"); | |
790 | case FC_FABCTLR_PORTID: | |
791 | return snprintf(buf, 30, "Fabric Controller\n"); | |
792 | case FC_DIRSRVR_PORTID: | |
793 | return snprintf(buf, 30, "Directory Server\n"); | |
794 | case FC_TIMESRVR_PORTID: | |
795 | return snprintf(buf, 30, "Time Server\n"); | |
796 | case FC_MGMTSRVR_PORTID: | |
797 | return snprintf(buf, 30, "Management Server\n"); | |
798 | default: | |
799 | return snprintf(buf, 30, "Unknown Fabric Entity\n"); | |
800 | } | |
801 | } else { | |
802 | if (rport->roles == FC_RPORT_ROLE_UNKNOWN) | |
803 | return snprintf(buf, 20, "unknown\n"); | |
804 | return get_fc_remote_port_roles_names(rport->roles, buf); | |
805 | } | |
806 | } | |
807 | static FC_CLASS_DEVICE_ATTR(rport, roles, S_IRUGO, | |
808 | show_fc_rport_roles, NULL); | |
809 | ||
810 | fc_private_rport_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
811 | fc_private_rport_rd_attr(scsi_target_id, "%d\n", 20); | |
812 | ||
0f29b966 JS |
813 | /* |
814 | * fast_io_fail_tmo attribute | |
815 | */ | |
816 | static ssize_t | |
817 | show_fc_rport_fast_io_fail_tmo (struct class_device *cdev, char *buf) | |
818 | { | |
819 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
820 | ||
821 | if (rport->fast_io_fail_tmo == -1) | |
822 | return snprintf(buf, 5, "off\n"); | |
823 | return snprintf(buf, 20, "%d\n", rport->fast_io_fail_tmo); | |
824 | } | |
825 | ||
826 | static ssize_t | |
827 | store_fc_rport_fast_io_fail_tmo(struct class_device *cdev, const char *buf, | |
828 | size_t count) | |
829 | { | |
830 | int val; | |
831 | char *cp; | |
832 | struct fc_rport *rport = transport_class_to_rport(cdev); | |
833 | ||
834 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) || | |
835 | (rport->port_state == FC_PORTSTATE_DELETED) || | |
836 | (rport->port_state == FC_PORTSTATE_NOTPRESENT)) | |
837 | return -EBUSY; | |
838 | if (strncmp(buf, "off", 3) == 0) | |
839 | rport->fast_io_fail_tmo = -1; | |
840 | else { | |
841 | val = simple_strtoul(buf, &cp, 0); | |
842 | if ((*cp && (*cp != '\n')) || | |
843 | (val < 0) || (val >= rport->dev_loss_tmo)) | |
844 | return -EINVAL; | |
845 | rport->fast_io_fail_tmo = val; | |
846 | } | |
847 | return count; | |
848 | } | |
849 | static FC_CLASS_DEVICE_ATTR(rport, fast_io_fail_tmo, S_IRUGO | S_IWUSR, | |
850 | show_fc_rport_fast_io_fail_tmo, store_fc_rport_fast_io_fail_tmo); | |
1da177e4 LT |
851 | |
852 | ||
853 | /* | |
854 | * FC SCSI Target Attribute Management | |
855 | */ | |
856 | ||
857 | /* | |
858 | * Note: in the target show function we recognize when the remote | |
859 | * port is in the heirarchy and do not allow the driver to get | |
860 | * involved in sysfs functions. The driver only gets involved if | |
861 | * it's the "old" style that doesn't use rports. | |
862 | */ | |
863 | #define fc_starget_show_function(field, format_string, sz, cast) \ | |
864 | static ssize_t \ | |
865 | show_fc_starget_##field (struct class_device *cdev, char *buf) \ | |
866 | { \ | |
867 | struct scsi_target *starget = transport_class_to_starget(cdev); \ | |
868 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); \ | |
869 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
870 | struct fc_rport *rport = starget_to_rport(starget); \ | |
871 | if (rport) \ | |
872 | fc_starget_##field(starget) = rport->field; \ | |
873 | else if (i->f->get_starget_##field) \ | |
874 | i->f->get_starget_##field(starget); \ | |
875 | return snprintf(buf, sz, format_string, \ | |
876 | cast fc_starget_##field(starget)); \ | |
877 | } | |
878 | ||
879 | #define fc_starget_rd_attr(field, format_string, sz) \ | |
880 | fc_starget_show_function(field, format_string, sz, ) \ | |
881 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
882 | show_fc_starget_##field, NULL) | |
883 | ||
884 | #define fc_starget_rd_attr_cast(field, format_string, sz, cast) \ | |
885 | fc_starget_show_function(field, format_string, sz, (cast)) \ | |
886 | static FC_CLASS_DEVICE_ATTR(starget, field, S_IRUGO, \ | |
887 | show_fc_starget_##field, NULL) | |
888 | ||
889 | #define SETUP_STARGET_ATTRIBUTE_RD(field) \ | |
890 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
891 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
892 | i->private_starget_attrs[count].store = NULL; \ | |
893 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
894 | if (i->f->show_starget_##field) \ | |
895 | count++ | |
896 | ||
897 | #define SETUP_STARGET_ATTRIBUTE_RW(field) \ | |
898 | i->private_starget_attrs[count] = class_device_attr_starget_##field; \ | |
899 | if (!i->f->set_starget_##field) { \ | |
900 | i->private_starget_attrs[count].attr.mode = S_IRUGO; \ | |
901 | i->private_starget_attrs[count].store = NULL; \ | |
902 | } \ | |
903 | i->starget_attrs[count] = &i->private_starget_attrs[count]; \ | |
904 | if (i->f->show_starget_##field) \ | |
905 | count++ | |
906 | ||
907 | /* The FC Transport SCSI Target Attributes: */ | |
908 | fc_starget_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
909 | fc_starget_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
910 | fc_starget_rd_attr(port_id, "0x%06x\n", 20); | |
911 | ||
912 | ||
913 | /* | |
914 | * Host Attribute Management | |
915 | */ | |
916 | ||
917 | #define fc_host_show_function(field, format_string, sz, cast) \ | |
918 | static ssize_t \ | |
919 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
920 | { \ | |
921 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
922 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
923 | if (i->f->get_host_##field) \ | |
924 | i->f->get_host_##field(shost); \ | |
925 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
926 | } | |
927 | ||
928 | #define fc_host_store_function(field) \ | |
929 | static ssize_t \ | |
930 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
931 | size_t count) \ | |
932 | { \ | |
933 | int val; \ | |
934 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
935 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
0f29b966 | 936 | char *cp; \ |
1da177e4 | 937 | \ |
0f29b966 JS |
938 | val = simple_strtoul(buf, &cp, 0); \ |
939 | if (*cp && (*cp != '\n')) \ | |
940 | return -EINVAL; \ | |
1da177e4 LT |
941 | i->f->set_host_##field(shost, val); \ |
942 | return count; \ | |
943 | } | |
944 | ||
b8d08210 JS |
945 | #define fc_host_store_str_function(field, slen) \ |
946 | static ssize_t \ | |
947 | store_fc_host_##field(struct class_device *cdev, const char *buf, \ | |
948 | size_t count) \ | |
949 | { \ | |
950 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
951 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
952 | unsigned int cnt=count; \ | |
953 | \ | |
954 | /* count may include a LF at end of string */ \ | |
955 | if (buf[cnt-1] == '\n') \ | |
956 | cnt--; \ | |
957 | if (cnt > ((slen) - 1)) \ | |
958 | return -EINVAL; \ | |
959 | memcpy(fc_host_##field(shost), buf, cnt); \ | |
960 | i->f->set_host_##field(shost); \ | |
961 | return count; \ | |
962 | } | |
963 | ||
1da177e4 LT |
964 | #define fc_host_rd_attr(field, format_string, sz) \ |
965 | fc_host_show_function(field, format_string, sz, ) \ | |
966 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
967 | show_fc_host_##field, NULL) | |
968 | ||
969 | #define fc_host_rd_attr_cast(field, format_string, sz, cast) \ | |
970 | fc_host_show_function(field, format_string, sz, (cast)) \ | |
971 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
972 | show_fc_host_##field, NULL) | |
973 | ||
974 | #define fc_host_rw_attr(field, format_string, sz) \ | |
975 | fc_host_show_function(field, format_string, sz, ) \ | |
976 | fc_host_store_function(field) \ | |
977 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO | S_IWUSR, \ | |
978 | show_fc_host_##field, \ | |
979 | store_fc_host_##field) | |
980 | ||
981 | #define fc_host_rd_enum_attr(title, maxlen) \ | |
982 | static ssize_t \ | |
983 | show_fc_host_##title (struct class_device *cdev, char *buf) \ | |
984 | { \ | |
985 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
986 | struct fc_internal *i = to_fc_internal(shost->transportt); \ | |
987 | const char *name; \ | |
988 | if (i->f->get_host_##title) \ | |
989 | i->f->get_host_##title(shost); \ | |
990 | name = get_fc_##title##_name(fc_host_##title(shost)); \ | |
991 | if (!name) \ | |
992 | return -EINVAL; \ | |
993 | return snprintf(buf, maxlen, "%s\n", name); \ | |
994 | } \ | |
995 | static FC_CLASS_DEVICE_ATTR(host, title, S_IRUGO, show_fc_host_##title, NULL) | |
996 | ||
997 | #define SETUP_HOST_ATTRIBUTE_RD(field) \ | |
998 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
999 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1000 | i->private_host_attrs[count].store = NULL; \ | |
1001 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1002 | if (i->f->show_host_##field) \ | |
1003 | count++ | |
1004 | ||
1005 | #define SETUP_HOST_ATTRIBUTE_RW(field) \ | |
1006 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1007 | if (!i->f->set_host_##field) { \ | |
1008 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1009 | i->private_host_attrs[count].store = NULL; \ | |
1010 | } \ | |
1011 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1012 | if (i->f->show_host_##field) \ | |
1013 | count++ | |
1014 | ||
1015 | ||
1016 | #define fc_private_host_show_function(field, format_string, sz, cast) \ | |
1017 | static ssize_t \ | |
1018 | show_fc_host_##field (struct class_device *cdev, char *buf) \ | |
1019 | { \ | |
1020 | struct Scsi_Host *shost = transport_class_to_shost(cdev); \ | |
1021 | return snprintf(buf, sz, format_string, cast fc_host_##field(shost)); \ | |
1022 | } | |
1023 | ||
1024 | #define fc_private_host_rd_attr(field, format_string, sz) \ | |
1025 | fc_private_host_show_function(field, format_string, sz, ) \ | |
1026 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1027 | show_fc_host_##field, NULL) | |
1028 | ||
1029 | #define fc_private_host_rd_attr_cast(field, format_string, sz, cast) \ | |
1030 | fc_private_host_show_function(field, format_string, sz, (cast)) \ | |
1031 | static FC_CLASS_DEVICE_ATTR(host, field, S_IRUGO, \ | |
1032 | show_fc_host_##field, NULL) | |
1033 | ||
1034 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RD(field) \ | |
1035 | i->private_host_attrs[count] = class_device_attr_host_##field; \ | |
1036 | i->private_host_attrs[count].attr.mode = S_IRUGO; \ | |
1037 | i->private_host_attrs[count].store = NULL; \ | |
1038 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
1039 | count++ | |
1040 | ||
1041 | #define SETUP_PRIVATE_HOST_ATTRIBUTE_RW(field) \ | |
91ca7b01 | 1042 | { \ |
1da177e4 LT |
1043 | i->private_host_attrs[count] = class_device_attr_host_##field; \ |
1044 | i->host_attrs[count] = &i->private_host_attrs[count]; \ | |
91ca7b01 AV |
1045 | count++; \ |
1046 | } | |
1da177e4 LT |
1047 | |
1048 | ||
1049 | /* Fixed Host Attributes */ | |
1050 | ||
1051 | static ssize_t | |
1052 | show_fc_host_supported_classes (struct class_device *cdev, char *buf) | |
1053 | { | |
1054 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1055 | ||
1056 | if (fc_host_supported_classes(shost) == FC_COS_UNSPECIFIED) | |
1057 | return snprintf(buf, 20, "unspecified\n"); | |
1058 | ||
1059 | return get_fc_cos_names(fc_host_supported_classes(shost), buf); | |
1060 | } | |
1061 | static FC_CLASS_DEVICE_ATTR(host, supported_classes, S_IRUGO, | |
1062 | show_fc_host_supported_classes, NULL); | |
1063 | ||
1064 | static ssize_t | |
1065 | show_fc_host_supported_fc4s (struct class_device *cdev, char *buf) | |
1066 | { | |
1067 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1068 | return (ssize_t)show_fc_fc4s(buf, fc_host_supported_fc4s(shost)); | |
1069 | } | |
1070 | static FC_CLASS_DEVICE_ATTR(host, supported_fc4s, S_IRUGO, | |
1071 | show_fc_host_supported_fc4s, NULL); | |
1072 | ||
1073 | static ssize_t | |
1074 | show_fc_host_supported_speeds (struct class_device *cdev, char *buf) | |
1075 | { | |
1076 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1077 | ||
1078 | if (fc_host_supported_speeds(shost) == FC_PORTSPEED_UNKNOWN) | |
1079 | return snprintf(buf, 20, "unknown\n"); | |
1080 | ||
1081 | return get_fc_port_speed_names(fc_host_supported_speeds(shost), buf); | |
1082 | } | |
1083 | static FC_CLASS_DEVICE_ATTR(host, supported_speeds, S_IRUGO, | |
1084 | show_fc_host_supported_speeds, NULL); | |
1085 | ||
1086 | ||
1087 | fc_private_host_rd_attr_cast(node_name, "0x%llx\n", 20, unsigned long long); | |
1088 | fc_private_host_rd_attr_cast(port_name, "0x%llx\n", 20, unsigned long long); | |
6b7281d0 AH |
1089 | fc_private_host_rd_attr_cast(permanent_port_name, "0x%llx\n", 20, |
1090 | unsigned long long); | |
1da177e4 LT |
1091 | fc_private_host_rd_attr(maxframe_size, "%u bytes\n", 20); |
1092 | fc_private_host_rd_attr(serial_number, "%s\n", (FC_SERIAL_NUMBER_SIZE +1)); | |
1093 | ||
1094 | ||
1095 | /* Dynamic Host Attributes */ | |
1096 | ||
1097 | static ssize_t | |
1098 | show_fc_host_active_fc4s (struct class_device *cdev, char *buf) | |
1099 | { | |
1100 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1101 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1102 | ||
1103 | if (i->f->get_host_active_fc4s) | |
1104 | i->f->get_host_active_fc4s(shost); | |
1105 | ||
1106 | return (ssize_t)show_fc_fc4s(buf, fc_host_active_fc4s(shost)); | |
1107 | } | |
1108 | static FC_CLASS_DEVICE_ATTR(host, active_fc4s, S_IRUGO, | |
1109 | show_fc_host_active_fc4s, NULL); | |
1110 | ||
1111 | static ssize_t | |
1112 | show_fc_host_speed (struct class_device *cdev, char *buf) | |
1113 | { | |
1114 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1115 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1116 | ||
1117 | if (i->f->get_host_speed) | |
1118 | i->f->get_host_speed(shost); | |
1119 | ||
1120 | if (fc_host_speed(shost) == FC_PORTSPEED_UNKNOWN) | |
1121 | return snprintf(buf, 20, "unknown\n"); | |
1122 | ||
1123 | return get_fc_port_speed_names(fc_host_speed(shost), buf); | |
1124 | } | |
1125 | static FC_CLASS_DEVICE_ATTR(host, speed, S_IRUGO, | |
1126 | show_fc_host_speed, NULL); | |
1127 | ||
1128 | ||
1129 | fc_host_rd_attr(port_id, "0x%06x\n", 20); | |
1130 | fc_host_rd_enum_attr(port_type, FC_PORTTYPE_MAX_NAMELEN); | |
1131 | fc_host_rd_enum_attr(port_state, FC_PORTSTATE_MAX_NAMELEN); | |
1132 | fc_host_rd_attr_cast(fabric_name, "0x%llx\n", 20, unsigned long long); | |
016131b8 | 1133 | fc_host_rd_attr(symbolic_name, "%s\n", FC_SYMBOLIC_NAME_SIZE + 1); |
1da177e4 | 1134 | |
b8d08210 JS |
1135 | fc_private_host_show_function(system_hostname, "%s\n", |
1136 | FC_SYMBOLIC_NAME_SIZE + 1, ) | |
1137 | fc_host_store_str_function(system_hostname, FC_SYMBOLIC_NAME_SIZE) | |
1138 | static FC_CLASS_DEVICE_ATTR(host, system_hostname, S_IRUGO | S_IWUSR, | |
1139 | show_fc_host_system_hostname, store_fc_host_system_hostname); | |
1140 | ||
1da177e4 LT |
1141 | |
1142 | /* Private Host Attributes */ | |
1143 | ||
1144 | static ssize_t | |
1145 | show_fc_private_host_tgtid_bind_type(struct class_device *cdev, char *buf) | |
1146 | { | |
1147 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1148 | const char *name; | |
1149 | ||
1150 | name = get_fc_tgtid_bind_type_name(fc_host_tgtid_bind_type(shost)); | |
1151 | if (!name) | |
1152 | return -EINVAL; | |
1153 | return snprintf(buf, FC_BINDTYPE_MAX_NAMELEN, "%s\n", name); | |
1154 | } | |
1155 | ||
d16794f6 JSEC |
1156 | #define get_list_head_entry(pos, head, member) \ |
1157 | pos = list_entry((head)->next, typeof(*pos), member) | |
1158 | ||
1da177e4 LT |
1159 | static ssize_t |
1160 | store_fc_private_host_tgtid_bind_type(struct class_device *cdev, | |
1161 | const char *buf, size_t count) | |
1162 | { | |
1163 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
d16794f6 | 1164 | struct fc_rport *rport; |
1da177e4 LT |
1165 | enum fc_tgtid_binding_type val; |
1166 | unsigned long flags; | |
1167 | ||
1168 | if (get_fc_tgtid_bind_type_match(buf, &val)) | |
1169 | return -EINVAL; | |
1170 | ||
1171 | /* if changing bind type, purge all unused consistent bindings */ | |
1172 | if (val != fc_host_tgtid_bind_type(shost)) { | |
1173 | spin_lock_irqsave(shost->host_lock, flags); | |
d16794f6 JSEC |
1174 | while (!list_empty(&fc_host_rport_bindings(shost))) { |
1175 | get_list_head_entry(rport, | |
1176 | &fc_host_rport_bindings(shost), peers); | |
aedf3497 JS |
1177 | list_del(&rport->peers); |
1178 | rport->port_state = FC_PORTSTATE_DELETED; | |
1179 | fc_queue_work(shost, &rport->rport_delete_work); | |
d16794f6 | 1180 | } |
1da177e4 LT |
1181 | spin_unlock_irqrestore(shost->host_lock, flags); |
1182 | } | |
1183 | ||
1184 | fc_host_tgtid_bind_type(shost) = val; | |
1185 | return count; | |
1186 | } | |
1187 | ||
1188 | static FC_CLASS_DEVICE_ATTR(host, tgtid_bind_type, S_IRUGO | S_IWUSR, | |
1189 | show_fc_private_host_tgtid_bind_type, | |
1190 | store_fc_private_host_tgtid_bind_type); | |
1191 | ||
91ca7b01 AV |
1192 | static ssize_t |
1193 | store_fc_private_host_issue_lip(struct class_device *cdev, | |
1194 | const char *buf, size_t count) | |
1195 | { | |
1196 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1197 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1198 | int ret; | |
1199 | ||
1200 | /* ignore any data value written to the attribute */ | |
1201 | if (i->f->issue_fc_host_lip) { | |
1202 | ret = i->f->issue_fc_host_lip(shost); | |
1203 | return ret ? ret: count; | |
1204 | } | |
1205 | ||
1206 | return -ENOENT; | |
1207 | } | |
1208 | ||
1209 | static FC_CLASS_DEVICE_ATTR(host, issue_lip, S_IWUSR, NULL, | |
1210 | store_fc_private_host_issue_lip); | |
1211 | ||
1da177e4 LT |
1212 | /* |
1213 | * Host Statistics Management | |
1214 | */ | |
1215 | ||
1216 | /* Show a given an attribute in the statistics group */ | |
1217 | static ssize_t | |
1218 | fc_stat_show(const struct class_device *cdev, char *buf, unsigned long offset) | |
1219 | { | |
1220 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1221 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1222 | struct fc_host_statistics *stats; | |
1223 | ssize_t ret = -ENOENT; | |
1224 | ||
1225 | if (offset > sizeof(struct fc_host_statistics) || | |
1226 | offset % sizeof(u64) != 0) | |
1227 | WARN_ON(1); | |
1228 | ||
1229 | if (i->f->get_fc_host_stats) { | |
1230 | stats = (i->f->get_fc_host_stats)(shost); | |
1231 | if (stats) | |
1232 | ret = snprintf(buf, 20, "0x%llx\n", | |
1233 | (unsigned long long)*(u64 *)(((u8 *) stats) + offset)); | |
1234 | } | |
1235 | return ret; | |
1236 | } | |
1237 | ||
1238 | ||
1239 | /* generate a read-only statistics attribute */ | |
1240 | #define fc_host_statistic(name) \ | |
1241 | static ssize_t show_fcstat_##name(struct class_device *cd, char *buf) \ | |
1242 | { \ | |
1243 | return fc_stat_show(cd, buf, \ | |
1244 | offsetof(struct fc_host_statistics, name)); \ | |
1245 | } \ | |
1246 | static FC_CLASS_DEVICE_ATTR(host, name, S_IRUGO, show_fcstat_##name, NULL) | |
1247 | ||
1248 | fc_host_statistic(seconds_since_last_reset); | |
1249 | fc_host_statistic(tx_frames); | |
1250 | fc_host_statistic(tx_words); | |
1251 | fc_host_statistic(rx_frames); | |
1252 | fc_host_statistic(rx_words); | |
1253 | fc_host_statistic(lip_count); | |
1254 | fc_host_statistic(nos_count); | |
1255 | fc_host_statistic(error_frames); | |
1256 | fc_host_statistic(dumped_frames); | |
1257 | fc_host_statistic(link_failure_count); | |
1258 | fc_host_statistic(loss_of_sync_count); | |
1259 | fc_host_statistic(loss_of_signal_count); | |
1260 | fc_host_statistic(prim_seq_protocol_err_count); | |
1261 | fc_host_statistic(invalid_tx_word_count); | |
1262 | fc_host_statistic(invalid_crc_count); | |
1263 | fc_host_statistic(fcp_input_requests); | |
1264 | fc_host_statistic(fcp_output_requests); | |
1265 | fc_host_statistic(fcp_control_requests); | |
1266 | fc_host_statistic(fcp_input_megabytes); | |
1267 | fc_host_statistic(fcp_output_megabytes); | |
1268 | ||
1269 | static ssize_t | |
1270 | fc_reset_statistics(struct class_device *cdev, const char *buf, | |
1271 | size_t count) | |
1272 | { | |
1273 | struct Scsi_Host *shost = transport_class_to_shost(cdev); | |
1274 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
1275 | ||
1276 | /* ignore any data value written to the attribute */ | |
1277 | if (i->f->reset_fc_host_stats) { | |
1278 | i->f->reset_fc_host_stats(shost); | |
1279 | return count; | |
1280 | } | |
1281 | ||
1282 | return -ENOENT; | |
1283 | } | |
1284 | static FC_CLASS_DEVICE_ATTR(host, reset_statistics, S_IWUSR, NULL, | |
1285 | fc_reset_statistics); | |
1286 | ||
1287 | ||
1288 | static struct attribute *fc_statistics_attrs[] = { | |
1289 | &class_device_attr_host_seconds_since_last_reset.attr, | |
1290 | &class_device_attr_host_tx_frames.attr, | |
1291 | &class_device_attr_host_tx_words.attr, | |
1292 | &class_device_attr_host_rx_frames.attr, | |
1293 | &class_device_attr_host_rx_words.attr, | |
1294 | &class_device_attr_host_lip_count.attr, | |
1295 | &class_device_attr_host_nos_count.attr, | |
1296 | &class_device_attr_host_error_frames.attr, | |
1297 | &class_device_attr_host_dumped_frames.attr, | |
1298 | &class_device_attr_host_link_failure_count.attr, | |
1299 | &class_device_attr_host_loss_of_sync_count.attr, | |
1300 | &class_device_attr_host_loss_of_signal_count.attr, | |
1301 | &class_device_attr_host_prim_seq_protocol_err_count.attr, | |
1302 | &class_device_attr_host_invalid_tx_word_count.attr, | |
1303 | &class_device_attr_host_invalid_crc_count.attr, | |
1304 | &class_device_attr_host_fcp_input_requests.attr, | |
1305 | &class_device_attr_host_fcp_output_requests.attr, | |
1306 | &class_device_attr_host_fcp_control_requests.attr, | |
1307 | &class_device_attr_host_fcp_input_megabytes.attr, | |
1308 | &class_device_attr_host_fcp_output_megabytes.attr, | |
1309 | &class_device_attr_host_reset_statistics.attr, | |
1310 | NULL | |
1311 | }; | |
1312 | ||
1313 | static struct attribute_group fc_statistics_group = { | |
1314 | .name = "statistics", | |
1315 | .attrs = fc_statistics_attrs, | |
1316 | }; | |
1317 | ||
1318 | static int fc_host_match(struct attribute_container *cont, | |
1319 | struct device *dev) | |
1320 | { | |
1321 | struct Scsi_Host *shost; | |
1322 | struct fc_internal *i; | |
1323 | ||
1324 | if (!scsi_is_host_device(dev)) | |
1325 | return 0; | |
1326 | ||
1327 | shost = dev_to_shost(dev); | |
1328 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1329 | != &fc_host_class.class) | |
1330 | return 0; | |
1331 | ||
1332 | i = to_fc_internal(shost->transportt); | |
1333 | ||
1334 | return &i->t.host_attrs.ac == cont; | |
1335 | } | |
1336 | ||
1337 | static int fc_target_match(struct attribute_container *cont, | |
1338 | struct device *dev) | |
1339 | { | |
1340 | struct Scsi_Host *shost; | |
1341 | struct fc_internal *i; | |
1342 | ||
1343 | if (!scsi_is_target_device(dev)) | |
1344 | return 0; | |
1345 | ||
1346 | shost = dev_to_shost(dev->parent); | |
1347 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1348 | != &fc_host_class.class) | |
1349 | return 0; | |
1350 | ||
1351 | i = to_fc_internal(shost->transportt); | |
1352 | ||
1353 | return &i->t.target_attrs.ac == cont; | |
1354 | } | |
1355 | ||
1356 | static void fc_rport_dev_release(struct device *dev) | |
1357 | { | |
1358 | struct fc_rport *rport = dev_to_rport(dev); | |
1359 | put_device(dev->parent); | |
1360 | kfree(rport); | |
1361 | } | |
1362 | ||
1363 | int scsi_is_fc_rport(const struct device *dev) | |
1364 | { | |
1365 | return dev->release == fc_rport_dev_release; | |
1366 | } | |
1367 | EXPORT_SYMBOL(scsi_is_fc_rport); | |
1368 | ||
1369 | static int fc_rport_match(struct attribute_container *cont, | |
1370 | struct device *dev) | |
1371 | { | |
1372 | struct Scsi_Host *shost; | |
1373 | struct fc_internal *i; | |
1374 | ||
1375 | if (!scsi_is_fc_rport(dev)) | |
1376 | return 0; | |
1377 | ||
1378 | shost = dev_to_shost(dev->parent); | |
1379 | if (!shost->transportt || shost->transportt->host_attrs.ac.class | |
1380 | != &fc_host_class.class) | |
1381 | return 0; | |
1382 | ||
1383 | i = to_fc_internal(shost->transportt); | |
1384 | ||
1385 | return &i->rport_attr_cont.ac == cont; | |
1386 | } | |
1387 | ||
5c44cd2a | 1388 | |
c829c394 JS |
1389 | /** |
1390 | * fc_timed_out - FC Transport I/O timeout intercept handler | |
1391 | * | |
1392 | * @scmd: The SCSI command which timed out | |
1393 | * | |
1394 | * This routine protects against error handlers getting invoked while a | |
1395 | * rport is in a blocked state, typically due to a temporarily loss of | |
1396 | * connectivity. If the error handlers are allowed to proceed, requests | |
1397 | * to abort i/o, reset the target, etc will likely fail as there is no way | |
1398 | * to communicate with the device to perform the requested function. These | |
1399 | * failures may result in the midlayer taking the device offline, requiring | |
1400 | * manual intervention to restore operation. | |
1401 | * | |
1402 | * This routine, called whenever an i/o times out, validates the state of | |
1403 | * the underlying rport. If the rport is blocked, it returns | |
1404 | * EH_RESET_TIMER, which will continue to reschedule the timeout. | |
1405 | * Eventually, either the device will return, or devloss_tmo will fire, | |
1406 | * and when the timeout then fires, it will be handled normally. | |
1407 | * If the rport is not blocked, normal error handling continues. | |
1408 | * | |
1409 | * Notes: | |
1410 | * This routine assumes no locks are held on entry. | |
1411 | **/ | |
1412 | static enum scsi_eh_timer_return | |
1413 | fc_timed_out(struct scsi_cmnd *scmd) | |
1414 | { | |
1415 | struct fc_rport *rport = starget_to_rport(scsi_target(scmd->device)); | |
1416 | ||
1417 | if (rport->port_state == FC_PORTSTATE_BLOCKED) | |
1418 | return EH_RESET_TIMER; | |
1419 | ||
1420 | return EH_NOT_HANDLED; | |
1421 | } | |
1422 | ||
5c44cd2a JSEC |
1423 | /* |
1424 | * Must be called with shost->host_lock held | |
1425 | */ | |
e02f3f59 CH |
1426 | static int fc_user_scan(struct Scsi_Host *shost, uint channel, |
1427 | uint id, uint lun) | |
5c44cd2a JSEC |
1428 | { |
1429 | struct fc_rport *rport; | |
1430 | ||
e02f3f59 CH |
1431 | list_for_each_entry(rport, &fc_host_rports(shost), peers) { |
1432 | if (rport->scsi_target_id == -1) | |
1433 | continue; | |
5c44cd2a | 1434 | |
e02f3f59 CH |
1435 | if ((channel == SCAN_WILD_CARD || channel == rport->channel) && |
1436 | (id == SCAN_WILD_CARD || id == rport->scsi_target_id)) { | |
1437 | scsi_scan_target(&rport->dev, rport->channel, | |
1438 | rport->scsi_target_id, lun, 1); | |
1439 | } | |
1440 | } | |
1441 | ||
1442 | return 0; | |
5c44cd2a JSEC |
1443 | } |
1444 | ||
1da177e4 LT |
1445 | struct scsi_transport_template * |
1446 | fc_attach_transport(struct fc_function_template *ft) | |
1447 | { | |
1da177e4 | 1448 | int count; |
24669f75 JS |
1449 | struct fc_internal *i = kzalloc(sizeof(struct fc_internal), |
1450 | GFP_KERNEL); | |
1da177e4 LT |
1451 | |
1452 | if (unlikely(!i)) | |
1453 | return NULL; | |
1454 | ||
1da177e4 LT |
1455 | i->t.target_attrs.ac.attrs = &i->starget_attrs[0]; |
1456 | i->t.target_attrs.ac.class = &fc_transport_class.class; | |
1457 | i->t.target_attrs.ac.match = fc_target_match; | |
1458 | i->t.target_size = sizeof(struct fc_starget_attrs); | |
1459 | transport_container_register(&i->t.target_attrs); | |
1460 | ||
1461 | i->t.host_attrs.ac.attrs = &i->host_attrs[0]; | |
1462 | i->t.host_attrs.ac.class = &fc_host_class.class; | |
1463 | i->t.host_attrs.ac.match = fc_host_match; | |
1464 | i->t.host_size = sizeof(struct fc_host_attrs); | |
1465 | if (ft->get_fc_host_stats) | |
1466 | i->t.host_attrs.statistics = &fc_statistics_group; | |
1467 | transport_container_register(&i->t.host_attrs); | |
1468 | ||
1469 | i->rport_attr_cont.ac.attrs = &i->rport_attrs[0]; | |
1470 | i->rport_attr_cont.ac.class = &fc_rport_class.class; | |
1471 | i->rport_attr_cont.ac.match = fc_rport_match; | |
1472 | transport_container_register(&i->rport_attr_cont); | |
1473 | ||
1474 | i->f = ft; | |
1475 | ||
1476 | /* Transport uses the shost workq for scsi scanning */ | |
1477 | i->t.create_work_queue = 1; | |
5c44cd2a | 1478 | |
c829c394 JS |
1479 | i->t.eh_timed_out = fc_timed_out; |
1480 | ||
e02f3f59 | 1481 | i->t.user_scan = fc_user_scan; |
1da177e4 LT |
1482 | |
1483 | /* | |
1484 | * Setup SCSI Target Attributes. | |
1485 | */ | |
1486 | count = 0; | |
1487 | SETUP_STARGET_ATTRIBUTE_RD(node_name); | |
1488 | SETUP_STARGET_ATTRIBUTE_RD(port_name); | |
1489 | SETUP_STARGET_ATTRIBUTE_RD(port_id); | |
1490 | ||
1491 | BUG_ON(count > FC_STARGET_NUM_ATTRS); | |
1492 | ||
1493 | i->starget_attrs[count] = NULL; | |
1494 | ||
1495 | ||
1496 | /* | |
1497 | * Setup SCSI Host Attributes. | |
1498 | */ | |
1499 | count=0; | |
1500 | SETUP_HOST_ATTRIBUTE_RD(node_name); | |
1501 | SETUP_HOST_ATTRIBUTE_RD(port_name); | |
6b7281d0 | 1502 | SETUP_HOST_ATTRIBUTE_RD(permanent_port_name); |
1da177e4 LT |
1503 | SETUP_HOST_ATTRIBUTE_RD(supported_classes); |
1504 | SETUP_HOST_ATTRIBUTE_RD(supported_fc4s); | |
1da177e4 LT |
1505 | SETUP_HOST_ATTRIBUTE_RD(supported_speeds); |
1506 | SETUP_HOST_ATTRIBUTE_RD(maxframe_size); | |
1507 | SETUP_HOST_ATTRIBUTE_RD(serial_number); | |
1508 | ||
1509 | SETUP_HOST_ATTRIBUTE_RD(port_id); | |
1510 | SETUP_HOST_ATTRIBUTE_RD(port_type); | |
1511 | SETUP_HOST_ATTRIBUTE_RD(port_state); | |
1512 | SETUP_HOST_ATTRIBUTE_RD(active_fc4s); | |
1513 | SETUP_HOST_ATTRIBUTE_RD(speed); | |
1514 | SETUP_HOST_ATTRIBUTE_RD(fabric_name); | |
016131b8 | 1515 | SETUP_HOST_ATTRIBUTE_RD(symbolic_name); |
b8d08210 | 1516 | SETUP_HOST_ATTRIBUTE_RW(system_hostname); |
1da177e4 LT |
1517 | |
1518 | /* Transport-managed attributes */ | |
1519 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(tgtid_bind_type); | |
91ca7b01 AV |
1520 | if (ft->issue_fc_host_lip) |
1521 | SETUP_PRIVATE_HOST_ATTRIBUTE_RW(issue_lip); | |
1da177e4 LT |
1522 | |
1523 | BUG_ON(count > FC_HOST_NUM_ATTRS); | |
1524 | ||
1525 | i->host_attrs[count] = NULL; | |
1526 | ||
1527 | /* | |
1528 | * Setup Remote Port Attributes. | |
1529 | */ | |
1530 | count=0; | |
1531 | SETUP_RPORT_ATTRIBUTE_RD(maxframe_size); | |
1532 | SETUP_RPORT_ATTRIBUTE_RD(supported_classes); | |
1533 | SETUP_RPORT_ATTRIBUTE_RW(dev_loss_tmo); | |
1534 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(node_name); | |
1535 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_name); | |
1536 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_id); | |
1537 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(roles); | |
1538 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(port_state); | |
1539 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RD(scsi_target_id); | |
0f29b966 JS |
1540 | if (ft->terminate_rport_io) |
1541 | SETUP_PRIVATE_RPORT_ATTRIBUTE_RW(fast_io_fail_tmo); | |
1da177e4 LT |
1542 | |
1543 | BUG_ON(count > FC_RPORT_NUM_ATTRS); | |
1544 | ||
1545 | i->rport_attrs[count] = NULL; | |
1546 | ||
1547 | return &i->t; | |
1548 | } | |
1549 | EXPORT_SYMBOL(fc_attach_transport); | |
1550 | ||
1551 | void fc_release_transport(struct scsi_transport_template *t) | |
1552 | { | |
1553 | struct fc_internal *i = to_fc_internal(t); | |
1554 | ||
1555 | transport_container_unregister(&i->t.target_attrs); | |
1556 | transport_container_unregister(&i->t.host_attrs); | |
1557 | transport_container_unregister(&i->rport_attr_cont); | |
1558 | ||
1559 | kfree(i); | |
1560 | } | |
1561 | EXPORT_SYMBOL(fc_release_transport); | |
1562 | ||
aedf3497 JS |
1563 | /** |
1564 | * fc_queue_work - Queue work to the fc_host workqueue. | |
1565 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1566 | * @work: Work to queue for execution. | |
1567 | * | |
1568 | * Return value: | |
a0785edf JS |
1569 | * 1 - work queued for execution |
1570 | * 0 - work is already queued | |
1571 | * -EINVAL - work queue doesn't exist | |
aedf3497 JS |
1572 | **/ |
1573 | static int | |
1574 | fc_queue_work(struct Scsi_Host *shost, struct work_struct *work) | |
1575 | { | |
1576 | if (unlikely(!fc_host_work_q(shost))) { | |
1577 | printk(KERN_ERR | |
1578 | "ERROR: FC host '%s' attempted to queue work, " | |
1579 | "when no workqueue created.\n", shost->hostt->name); | |
1580 | dump_stack(); | |
1581 | ||
1582 | return -EINVAL; | |
1583 | } | |
1584 | ||
1585 | return queue_work(fc_host_work_q(shost), work); | |
1586 | } | |
1587 | ||
1588 | /** | |
1589 | * fc_flush_work - Flush a fc_host's workqueue. | |
1590 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1591 | **/ | |
1592 | static void | |
1593 | fc_flush_work(struct Scsi_Host *shost) | |
1594 | { | |
1595 | if (!fc_host_work_q(shost)) { | |
1596 | printk(KERN_ERR | |
1597 | "ERROR: FC host '%s' attempted to flush work, " | |
1598 | "when no workqueue created.\n", shost->hostt->name); | |
1599 | dump_stack(); | |
1600 | return; | |
1601 | } | |
1602 | ||
1603 | flush_workqueue(fc_host_work_q(shost)); | |
1604 | } | |
1605 | ||
1606 | /** | |
1607 | * fc_queue_devloss_work - Schedule work for the fc_host devloss workqueue. | |
1608 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1609 | * @work: Work to queue for execution. | |
1610 | * @delay: jiffies to delay the work queuing | |
1611 | * | |
1612 | * Return value: | |
0f29b966 | 1613 | * 1 on success / 0 already queued / < 0 for error |
aedf3497 JS |
1614 | **/ |
1615 | static int | |
1616 | fc_queue_devloss_work(struct Scsi_Host *shost, struct work_struct *work, | |
1617 | unsigned long delay) | |
1618 | { | |
1619 | if (unlikely(!fc_host_devloss_work_q(shost))) { | |
1620 | printk(KERN_ERR | |
1621 | "ERROR: FC host '%s' attempted to queue work, " | |
1622 | "when no workqueue created.\n", shost->hostt->name); | |
1623 | dump_stack(); | |
1624 | ||
1625 | return -EINVAL; | |
1626 | } | |
1627 | ||
0f29b966 JS |
1628 | if (delay == 0) |
1629 | return queue_work(fc_host_devloss_work_q(shost), work); | |
1630 | ||
aedf3497 JS |
1631 | return queue_delayed_work(fc_host_devloss_work_q(shost), work, delay); |
1632 | } | |
1633 | ||
1634 | /** | |
1635 | * fc_flush_devloss - Flush a fc_host's devloss workqueue. | |
1636 | * @shost: Pointer to Scsi_Host bound to fc_host. | |
1637 | **/ | |
1638 | static void | |
1639 | fc_flush_devloss(struct Scsi_Host *shost) | |
1640 | { | |
1641 | if (!fc_host_devloss_work_q(shost)) { | |
1642 | printk(KERN_ERR | |
1643 | "ERROR: FC host '%s' attempted to flush work, " | |
1644 | "when no workqueue created.\n", shost->hostt->name); | |
1645 | dump_stack(); | |
1646 | return; | |
1647 | } | |
1648 | ||
1649 | flush_workqueue(fc_host_devloss_work_q(shost)); | |
1650 | } | |
1651 | ||
1da177e4 LT |
1652 | |
1653 | /** | |
1654 | * fc_remove_host - called to terminate any fc_transport-related elements | |
1655 | * for a scsi host. | |
1656 | * @rport: remote port to be unblocked. | |
1657 | * | |
1658 | * This routine is expected to be called immediately preceeding the | |
1659 | * a driver's call to scsi_remove_host(). | |
1660 | * | |
1661 | * WARNING: A driver utilizing the fc_transport, which fails to call | |
1662 | * this routine prior to scsi_remote_host(), will leave dangling | |
1663 | * objects in /sys/class/fc_remote_ports. Access to any of these | |
1664 | * objects can result in a system crash !!! | |
1665 | * | |
1666 | * Notes: | |
1667 | * This routine assumes no locks are held on entry. | |
1668 | **/ | |
1669 | void | |
1670 | fc_remove_host(struct Scsi_Host *shost) | |
1671 | { | |
1672 | struct fc_rport *rport, *next_rport; | |
aedf3497 JS |
1673 | struct workqueue_struct *work_q; |
1674 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); | |
1da177e4 LT |
1675 | |
1676 | /* Remove any remote ports */ | |
1677 | list_for_each_entry_safe(rport, next_rport, | |
aedf3497 JS |
1678 | &fc_host->rports, peers) { |
1679 | list_del(&rport->peers); | |
1680 | rport->port_state = FC_PORTSTATE_DELETED; | |
1681 | fc_queue_work(shost, &rport->rport_delete_work); | |
1682 | } | |
1683 | ||
1da177e4 | 1684 | list_for_each_entry_safe(rport, next_rport, |
aedf3497 JS |
1685 | &fc_host->rport_bindings, peers) { |
1686 | list_del(&rport->peers); | |
1687 | rport->port_state = FC_PORTSTATE_DELETED; | |
1688 | fc_queue_work(shost, &rport->rport_delete_work); | |
1689 | } | |
1690 | ||
1691 | /* flush all scan work items */ | |
1692 | scsi_flush_work(shost); | |
1693 | ||
1694 | /* flush all stgt delete, and rport delete work items, then kill it */ | |
1695 | if (fc_host->work_q) { | |
1696 | work_q = fc_host->work_q; | |
1697 | fc_host->work_q = NULL; | |
1698 | destroy_workqueue(work_q); | |
1699 | } | |
1700 | ||
1701 | /* flush all devloss work items, then kill it */ | |
1702 | if (fc_host->devloss_work_q) { | |
1703 | work_q = fc_host->devloss_work_q; | |
1704 | fc_host->devloss_work_q = NULL; | |
1705 | destroy_workqueue(work_q); | |
1706 | } | |
1da177e4 LT |
1707 | } |
1708 | EXPORT_SYMBOL(fc_remove_host); | |
1709 | ||
aedf3497 JS |
1710 | |
1711 | /** | |
1712 | * fc_starget_delete - called to delete the scsi decendents of an rport | |
1713 | * (target and all sdevs) | |
1714 | * | |
1715 | * @data: remote port to be operated on. | |
1716 | **/ | |
19a7b4ae | 1717 | static void |
aedf3497 | 1718 | fc_starget_delete(void *data) |
19a7b4ae | 1719 | { |
aedf3497 | 1720 | struct fc_rport *rport = (struct fc_rport *)data; |
19a7b4ae | 1721 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 1722 | unsigned long flags; |
0f29b966 JS |
1723 | struct fc_internal *i = to_fc_internal(shost->transportt); |
1724 | ||
1725 | /* | |
1726 | * Involve the LLDD if possible. All io on the rport is to | |
1727 | * be terminated, either as part of the dev_loss_tmo callback | |
1728 | * processing, or via the terminate_rport_io function. | |
1729 | */ | |
1730 | if (i->f->dev_loss_tmo_callbk) | |
1731 | i->f->dev_loss_tmo_callbk(rport); | |
1732 | else if (i->f->terminate_rport_io) | |
1733 | i->f->terminate_rport_io(rport); | |
19a7b4ae | 1734 | |
aedf3497 JS |
1735 | spin_lock_irqsave(shost->host_lock, flags); |
1736 | if (rport->flags & FC_RPORT_DEVLOSS_PENDING) { | |
1737 | spin_unlock_irqrestore(shost->host_lock, flags); | |
0f29b966 JS |
1738 | if (!cancel_delayed_work(&rport->fail_io_work)) |
1739 | fc_flush_devloss(shost); | |
aedf3497 JS |
1740 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
1741 | fc_flush_devloss(shost); | |
1742 | spin_lock_irqsave(shost->host_lock, flags); | |
1743 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
1744 | } | |
1745 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
1746 | |
1747 | scsi_remove_target(&rport->dev); | |
1748 | } | |
1749 | ||
aedf3497 JS |
1750 | |
1751 | /** | |
1752 | * fc_rport_final_delete - finish rport termination and delete it. | |
1753 | * | |
1754 | * @data: remote port to be deleted. | |
1755 | **/ | |
1756 | static void | |
1757 | fc_rport_final_delete(void *data) | |
1758 | { | |
1759 | struct fc_rport *rport = (struct fc_rport *)data; | |
1760 | struct device *dev = &rport->dev; | |
1761 | struct Scsi_Host *shost = rport_to_shost(rport); | |
0f29b966 | 1762 | struct fc_internal *i = to_fc_internal(shost->transportt); |
aedf3497 JS |
1763 | |
1764 | /* | |
1765 | * if a scan is pending, flush the SCSI Host work_q so that | |
1766 | * that we can reclaim the rport scan work element. | |
1767 | */ | |
1768 | if (rport->flags & FC_RPORT_SCAN_PENDING) | |
1769 | scsi_flush_work(shost); | |
1770 | ||
0f29b966 JS |
1771 | /* Delete SCSI target and sdevs */ |
1772 | if (rport->scsi_target_id != -1) | |
1773 | fc_starget_delete(data); | |
1774 | else if (i->f->dev_loss_tmo_callbk) | |
1775 | i->f->dev_loss_tmo_callbk(rport); | |
1776 | else if (i->f->terminate_rport_io) | |
1777 | i->f->terminate_rport_io(rport); | |
1778 | ||
aedf3497 JS |
1779 | transport_remove_device(dev); |
1780 | device_del(dev); | |
1781 | transport_destroy_device(dev); | |
3bdad7bd JS |
1782 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1783 | put_device(dev); /* for self-reference */ | |
aedf3497 JS |
1784 | } |
1785 | ||
1786 | ||
1da177e4 LT |
1787 | /** |
1788 | * fc_rport_create - allocates and creates a remote FC port. | |
1789 | * @shost: scsi host the remote port is connected to. | |
1790 | * @channel: Channel on shost port connected to. | |
1791 | * @ids: The world wide names, fc address, and FC4 port | |
1792 | * roles for the remote port. | |
1793 | * | |
1794 | * Allocates and creates the remoter port structure, including the | |
1795 | * class and sysfs creation. | |
1796 | * | |
1797 | * Notes: | |
1798 | * This routine assumes no locks are held on entry. | |
1799 | **/ | |
1800 | struct fc_rport * | |
1801 | fc_rport_create(struct Scsi_Host *shost, int channel, | |
1802 | struct fc_rport_identifiers *ids) | |
1803 | { | |
aedf3497 | 1804 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1805 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
1806 | struct fc_rport *rport; | |
1807 | struct device *dev; | |
1808 | unsigned long flags; | |
1809 | int error; | |
1810 | size_t size; | |
1811 | ||
1812 | size = (sizeof(struct fc_rport) + fci->f->dd_fcrport_size); | |
24669f75 | 1813 | rport = kzalloc(size, GFP_KERNEL); |
1da177e4 LT |
1814 | if (unlikely(!rport)) { |
1815 | printk(KERN_ERR "%s: allocation failure\n", __FUNCTION__); | |
1816 | return NULL; | |
1817 | } | |
1da177e4 LT |
1818 | |
1819 | rport->maxframe_size = -1; | |
1820 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
1821 | rport->dev_loss_tmo = fc_dev_loss_tmo; | |
1822 | memcpy(&rport->node_name, &ids->node_name, sizeof(rport->node_name)); | |
1823 | memcpy(&rport->port_name, &ids->port_name, sizeof(rport->port_name)); | |
1824 | rport->port_id = ids->port_id; | |
1825 | rport->roles = ids->roles; | |
1826 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1827 | if (fci->f->dd_fcrport_size) | |
1828 | rport->dd_data = &rport[1]; | |
1829 | rport->channel = channel; | |
0f29b966 | 1830 | rport->fast_io_fail_tmo = -1; |
1da177e4 | 1831 | |
19a7b4ae | 1832 | INIT_WORK(&rport->dev_loss_work, fc_timeout_deleted_rport, rport); |
0f29b966 | 1833 | INIT_WORK(&rport->fail_io_work, fc_timeout_fail_rport_io, rport); |
1da177e4 | 1834 | INIT_WORK(&rport->scan_work, fc_scsi_scan_rport, rport); |
aedf3497 JS |
1835 | INIT_WORK(&rport->stgt_delete_work, fc_starget_delete, rport); |
1836 | INIT_WORK(&rport->rport_delete_work, fc_rport_final_delete, rport); | |
1da177e4 LT |
1837 | |
1838 | spin_lock_irqsave(shost->host_lock, flags); | |
1839 | ||
1840 | rport->number = fc_host->next_rport_number++; | |
1841 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) | |
1842 | rport->scsi_target_id = fc_host->next_target_id++; | |
1843 | else | |
1844 | rport->scsi_target_id = -1; | |
aedf3497 | 1845 | list_add_tail(&rport->peers, &fc_host->rports); |
3bdad7bd | 1846 | get_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
1847 | |
1848 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1849 | ||
1850 | dev = &rport->dev; | |
3bdad7bd JS |
1851 | device_initialize(dev); /* takes self reference */ |
1852 | dev->parent = get_device(&shost->shost_gendev); /* parent reference */ | |
1da177e4 LT |
1853 | dev->release = fc_rport_dev_release; |
1854 | sprintf(dev->bus_id, "rport-%d:%d-%d", | |
1855 | shost->host_no, channel, rport->number); | |
1856 | transport_setup_device(dev); | |
1857 | ||
1858 | error = device_add(dev); | |
1859 | if (error) { | |
1860 | printk(KERN_ERR "FC Remote Port device_add failed\n"); | |
1861 | goto delete_rport; | |
1862 | } | |
1863 | transport_add_device(dev); | |
1864 | transport_configure_device(dev); | |
1865 | ||
aedf3497 | 1866 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 1867 | /* initiate a scan of the target */ |
aedf3497 | 1868 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 1869 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 1870 | } |
1da177e4 LT |
1871 | |
1872 | return rport; | |
1873 | ||
1874 | delete_rport: | |
1875 | transport_destroy_device(dev); | |
1da177e4 LT |
1876 | spin_lock_irqsave(shost->host_lock, flags); |
1877 | list_del(&rport->peers); | |
3bdad7bd | 1878 | put_device(&shost->shost_gendev); /* for fc_host->rport list */ |
1da177e4 LT |
1879 | spin_unlock_irqrestore(shost->host_lock, flags); |
1880 | put_device(dev->parent); | |
1881 | kfree(rport); | |
1882 | return NULL; | |
1883 | } | |
1884 | ||
1885 | /** | |
1886 | * fc_remote_port_add - notifies the fc transport of the existence | |
1887 | * of a remote FC port. | |
1888 | * @shost: scsi host the remote port is connected to. | |
1889 | * @channel: Channel on shost port connected to. | |
1890 | * @ids: The world wide names, fc address, and FC4 port | |
1891 | * roles for the remote port. | |
1892 | * | |
1893 | * The LLDD calls this routine to notify the transport of the existence | |
1894 | * of a remote port. The LLDD provides the unique identifiers (wwpn,wwn) | |
1895 | * of the port, it's FC address (port_id), and the FC4 roles that are | |
1896 | * active for the port. | |
1897 | * | |
1898 | * For ports that are FCP targets (aka scsi targets), the FC transport | |
1899 | * maintains consistent target id bindings on behalf of the LLDD. | |
1900 | * A consistent target id binding is an assignment of a target id to | |
1901 | * a remote port identifier, which persists while the scsi host is | |
1902 | * attached. The remote port can disappear, then later reappear, and | |
1903 | * it's target id assignment remains the same. This allows for shifts | |
1904 | * in FC addressing (if binding by wwpn or wwnn) with no apparent | |
1905 | * changes to the scsi subsystem which is based on scsi host number and | |
1906 | * target id values. Bindings are only valid during the attachment of | |
1907 | * the scsi host. If the host detaches, then later re-attaches, target | |
1908 | * id bindings may change. | |
1909 | * | |
1910 | * This routine is responsible for returning a remote port structure. | |
1911 | * The routine will search the list of remote ports it maintains | |
1912 | * internally on behalf of consistent target id mappings. If found, the | |
1913 | * remote port structure will be reused. Otherwise, a new remote port | |
1914 | * structure will be allocated. | |
1915 | * | |
1916 | * Whenever a remote port is allocated, a new fc_remote_port class | |
1917 | * device is created. | |
1918 | * | |
1919 | * Should not be called from interrupt context. | |
1920 | * | |
1921 | * Notes: | |
1922 | * This routine assumes no locks are held on entry. | |
1923 | **/ | |
1924 | struct fc_rport * | |
1925 | fc_remote_port_add(struct Scsi_Host *shost, int channel, | |
1926 | struct fc_rport_identifiers *ids) | |
1927 | { | |
19a7b4ae | 1928 | struct fc_internal *fci = to_fc_internal(shost->transportt); |
aedf3497 | 1929 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
1930 | struct fc_rport *rport; |
1931 | unsigned long flags; | |
1932 | int match = 0; | |
1933 | ||
aedf3497 JS |
1934 | /* ensure any stgt delete functions are done */ |
1935 | fc_flush_work(shost); | |
1936 | ||
19a7b4ae JSEC |
1937 | /* |
1938 | * Search the list of "active" rports, for an rport that has been | |
1939 | * deleted, but we've held off the real delete while the target | |
1940 | * is in a "blocked" state. | |
1941 | */ | |
1942 | spin_lock_irqsave(shost->host_lock, flags); | |
1943 | ||
aedf3497 | 1944 | list_for_each_entry(rport, &fc_host->rports, peers) { |
19a7b4ae JSEC |
1945 | |
1946 | if ((rport->port_state == FC_PORTSTATE_BLOCKED) && | |
1947 | (rport->channel == channel)) { | |
1948 | ||
aedf3497 | 1949 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
1950 | case FC_TGTID_BIND_BY_WWPN: |
1951 | case FC_TGTID_BIND_NONE: | |
1952 | if (rport->port_name == ids->port_name) | |
1953 | match = 1; | |
1954 | break; | |
1955 | case FC_TGTID_BIND_BY_WWNN: | |
1956 | if (rport->node_name == ids->node_name) | |
1957 | match = 1; | |
1958 | break; | |
1959 | case FC_TGTID_BIND_BY_ID: | |
1960 | if (rport->port_id == ids->port_id) | |
1961 | match = 1; | |
1962 | break; | |
1963 | } | |
1964 | ||
1965 | if (match) { | |
1966 | struct work_struct *work = | |
1967 | &rport->dev_loss_work; | |
1968 | ||
1969 | memcpy(&rport->node_name, &ids->node_name, | |
1970 | sizeof(rport->node_name)); | |
1971 | memcpy(&rport->port_name, &ids->port_name, | |
1972 | sizeof(rport->port_name)); | |
1973 | rport->port_id = ids->port_id; | |
1974 | ||
1975 | rport->port_state = FC_PORTSTATE_ONLINE; | |
1976 | rport->roles = ids->roles; | |
1977 | ||
1978 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1979 | ||
1980 | if (fci->f->dd_fcrport_size) | |
1981 | memset(rport->dd_data, 0, | |
1982 | fci->f->dd_fcrport_size); | |
1983 | ||
1984 | /* | |
1985 | * If we were blocked, we were a target. | |
1986 | * If no longer a target, we leave the timer | |
1987 | * running in case the port changes roles | |
1988 | * prior to the timer expiring. If the timer | |
1989 | * fires, the target will be torn down. | |
1990 | */ | |
1991 | if (!(ids->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
1992 | return rport; | |
1993 | ||
1994 | /* restart the target */ | |
1995 | ||
1996 | /* | |
0f29b966 | 1997 | * Stop the target timers first. Take no action |
19a7b4ae JSEC |
1998 | * on the del_timer failure as the state |
1999 | * machine state change will validate the | |
2000 | * transaction. | |
2001 | */ | |
0f29b966 JS |
2002 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2003 | fc_flush_devloss(shost); | |
19a7b4ae | 2004 | if (!cancel_delayed_work(work)) |
aedf3497 JS |
2005 | fc_flush_devloss(shost); |
2006 | ||
2007 | spin_lock_irqsave(shost->host_lock, flags); | |
2008 | ||
2009 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
19a7b4ae JSEC |
2010 | |
2011 | /* initiate a scan of the target */ | |
aedf3497 | 2012 | rport->flags |= FC_RPORT_SCAN_PENDING; |
19a7b4ae JSEC |
2013 | scsi_queue_work(shost, &rport->scan_work); |
2014 | ||
aedf3497 JS |
2015 | spin_unlock_irqrestore(shost->host_lock, flags); |
2016 | ||
a0785edf JS |
2017 | scsi_target_unblock(&rport->dev); |
2018 | ||
19a7b4ae JSEC |
2019 | return rport; |
2020 | } | |
2021 | } | |
2022 | } | |
2023 | ||
2024 | /* Search the bindings array */ | |
aedf3497 | 2025 | if (fc_host->tgtid_bind_type != FC_TGTID_BIND_NONE) { |
1da177e4 LT |
2026 | |
2027 | /* search for a matching consistent binding */ | |
2028 | ||
aedf3497 | 2029 | list_for_each_entry(rport, &fc_host->rport_bindings, |
1da177e4 LT |
2030 | peers) { |
2031 | if (rport->channel != channel) | |
2032 | continue; | |
2033 | ||
aedf3497 | 2034 | switch (fc_host->tgtid_bind_type) { |
1da177e4 LT |
2035 | case FC_TGTID_BIND_BY_WWPN: |
2036 | if (rport->port_name == ids->port_name) | |
2037 | match = 1; | |
2038 | break; | |
2039 | case FC_TGTID_BIND_BY_WWNN: | |
2040 | if (rport->node_name == ids->node_name) | |
2041 | match = 1; | |
2042 | break; | |
2043 | case FC_TGTID_BIND_BY_ID: | |
2044 | if (rport->port_id == ids->port_id) | |
2045 | match = 1; | |
2046 | break; | |
2047 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2048 | break; | |
2049 | } | |
2050 | ||
2051 | if (match) { | |
aedf3497 | 2052 | list_move_tail(&rport->peers, &fc_host->rports); |
1da177e4 LT |
2053 | break; |
2054 | } | |
2055 | } | |
2056 | ||
1da177e4 LT |
2057 | if (match) { |
2058 | memcpy(&rport->node_name, &ids->node_name, | |
2059 | sizeof(rport->node_name)); | |
2060 | memcpy(&rport->port_name, &ids->port_name, | |
2061 | sizeof(rport->port_name)); | |
2062 | rport->port_id = ids->port_id; | |
2063 | rport->roles = ids->roles; | |
2064 | rport->port_state = FC_PORTSTATE_ONLINE; | |
2065 | ||
19a7b4ae JSEC |
2066 | if (fci->f->dd_fcrport_size) |
2067 | memset(rport->dd_data, 0, | |
2068 | fci->f->dd_fcrport_size); | |
2069 | ||
aedf3497 | 2070 | if (rport->roles & FC_RPORT_ROLE_FCP_TARGET) { |
1da177e4 | 2071 | /* initiate a scan of the target */ |
aedf3497 | 2072 | rport->flags |= FC_RPORT_SCAN_PENDING; |
1da177e4 | 2073 | scsi_queue_work(shost, &rport->scan_work); |
a0785edf JS |
2074 | spin_unlock_irqrestore(shost->host_lock, flags); |
2075 | scsi_target_unblock(&rport->dev); | |
2076 | } else | |
2077 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2078 | |
2079 | return rport; | |
2080 | } | |
2081 | } | |
2082 | ||
19a7b4ae JSEC |
2083 | spin_unlock_irqrestore(shost->host_lock, flags); |
2084 | ||
1da177e4 LT |
2085 | /* No consistent binding found - create new remote port entry */ |
2086 | rport = fc_rport_create(shost, channel, ids); | |
2087 | ||
2088 | return rport; | |
2089 | } | |
2090 | EXPORT_SYMBOL(fc_remote_port_add); | |
2091 | ||
1da177e4 LT |
2092 | |
2093 | /** | |
2094 | * fc_remote_port_delete - notifies the fc transport that a remote | |
2095 | * port is no longer in existence. | |
2096 | * @rport: The remote port that no longer exists | |
2097 | * | |
2098 | * The LLDD calls this routine to notify the transport that a remote | |
2099 | * port is no longer part of the topology. Note: Although a port | |
2100 | * may no longer be part of the topology, it may persist in the remote | |
19a7b4ae JSEC |
2101 | * ports displayed by the fc_host. We do this under 2 conditions: |
2102 | * - If the port was a scsi target, we delay its deletion by "blocking" it. | |
2103 | * This allows the port to temporarily disappear, then reappear without | |
2104 | * disrupting the SCSI device tree attached to it. During the "blocked" | |
2105 | * period the port will still exist. | |
2106 | * - If the port was a scsi target and disappears for longer than we | |
2107 | * expect, we'll delete the port and the tear down the SCSI device tree | |
2108 | * attached to it. However, we want to semi-persist the target id assigned | |
2109 | * to that port if it eventually does exist. The port structure will | |
2110 | * remain (although with minimal information) so that the target id | |
2111 | * bindings remails. | |
1da177e4 LT |
2112 | * |
2113 | * If the remote port is not an FCP Target, it will be fully torn down | |
2114 | * and deallocated, including the fc_remote_port class device. | |
2115 | * | |
19a7b4ae JSEC |
2116 | * If the remote port is an FCP Target, the port will be placed in a |
2117 | * temporary blocked state. From the LLDD's perspective, the rport no | |
2118 | * longer exists. From the SCSI midlayer's perspective, the SCSI target | |
2119 | * exists, but all sdevs on it are blocked from further I/O. The following | |
2120 | * is then expected: | |
2121 | * If the remote port does not return (signaled by a LLDD call to | |
2122 | * fc_remote_port_add()) within the dev_loss_tmo timeout, then the | |
2123 | * scsi target is removed - killing all outstanding i/o and removing the | |
2124 | * scsi devices attached ot it. The port structure will be marked Not | |
2125 | * Present and be partially cleared, leaving only enough information to | |
2126 | * recognize the remote port relative to the scsi target id binding if | |
2127 | * it later appears. The port will remain as long as there is a valid | |
2128 | * binding (e.g. until the user changes the binding type or unloads the | |
2129 | * scsi host with the binding). | |
1da177e4 | 2130 | * |
19a7b4ae JSEC |
2131 | * If the remote port returns within the dev_loss_tmo value (and matches |
2132 | * according to the target id binding type), the port structure will be | |
2133 | * reused. If it is no longer a SCSI target, the target will be torn | |
2134 | * down. If it continues to be a SCSI target, then the target will be | |
2135 | * unblocked (allowing i/o to be resumed), and a scan will be activated | |
2136 | * to ensure that all luns are detected. | |
2137 | * | |
2138 | * Called from normal process context only - cannot be called from interrupt. | |
1da177e4 LT |
2139 | * |
2140 | * Notes: | |
2141 | * This routine assumes no locks are held on entry. | |
2142 | **/ | |
2143 | void | |
2144 | fc_remote_port_delete(struct fc_rport *rport) | |
2145 | { | |
aedf3497 | 2146 | struct Scsi_Host *shost = rport_to_shost(rport); |
0f29b966 | 2147 | struct fc_internal *i = to_fc_internal(shost->transportt); |
19a7b4ae | 2148 | int timeout = rport->dev_loss_tmo; |
aedf3497 JS |
2149 | unsigned long flags; |
2150 | ||
2151 | /* | |
2152 | * No need to flush the fc_host work_q's, as all adds are synchronous. | |
2153 | * | |
2154 | * We do need to reclaim the rport scan work element, so eventually | |
2155 | * (in fc_rport_final_delete()) we'll flush the scsi host work_q if | |
2156 | * there's still a scan pending. | |
2157 | */ | |
2158 | ||
2159 | spin_lock_irqsave(shost->host_lock, flags); | |
1da177e4 | 2160 | |
19a7b4ae JSEC |
2161 | /* If no scsi target id mapping, delete it */ |
2162 | if (rport->scsi_target_id == -1) { | |
aedf3497 JS |
2163 | list_del(&rport->peers); |
2164 | rport->port_state = FC_PORTSTATE_DELETED; | |
2165 | fc_queue_work(shost, &rport->rport_delete_work); | |
2166 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1da177e4 LT |
2167 | return; |
2168 | } | |
2169 | ||
aedf3497 JS |
2170 | rport->port_state = FC_PORTSTATE_BLOCKED; |
2171 | ||
2172 | rport->flags |= FC_RPORT_DEVLOSS_PENDING; | |
2173 | ||
2174 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2175 | ||
19a7b4ae | 2176 | scsi_target_block(&rport->dev); |
1da177e4 | 2177 | |
0f29b966 JS |
2178 | /* see if we need to kill io faster than waiting for device loss */ |
2179 | if ((rport->fast_io_fail_tmo != -1) && | |
2180 | (rport->fast_io_fail_tmo < timeout) && (i->f->terminate_rport_io)) | |
2181 | fc_queue_devloss_work(shost, &rport->fail_io_work, | |
2182 | rport->fast_io_fail_tmo * HZ); | |
2183 | ||
19a7b4ae | 2184 | /* cap the length the devices can be blocked until they are deleted */ |
aedf3497 | 2185 | fc_queue_devloss_work(shost, &rport->dev_loss_work, timeout * HZ); |
1da177e4 LT |
2186 | } |
2187 | EXPORT_SYMBOL(fc_remote_port_delete); | |
2188 | ||
2189 | /** | |
2190 | * fc_remote_port_rolechg - notifies the fc transport that the roles | |
2191 | * on a remote may have changed. | |
2192 | * @rport: The remote port that changed. | |
2193 | * | |
2194 | * The LLDD calls this routine to notify the transport that the roles | |
2195 | * on a remote port may have changed. The largest effect of this is | |
2196 | * if a port now becomes a FCP Target, it must be allocated a | |
2197 | * scsi target id. If the port is no longer a FCP target, any | |
2198 | * scsi target id value assigned to it will persist in case the | |
2199 | * role changes back to include FCP Target. No changes in the scsi | |
2200 | * midlayer will be invoked if the role changes (in the expectation | |
2201 | * that the role will be resumed. If it doesn't normal error processing | |
2202 | * will take place). | |
2203 | * | |
2204 | * Should not be called from interrupt context. | |
2205 | * | |
2206 | * Notes: | |
2207 | * This routine assumes no locks are held on entry. | |
2208 | **/ | |
2209 | void | |
2210 | fc_remote_port_rolechg(struct fc_rport *rport, u32 roles) | |
2211 | { | |
2212 | struct Scsi_Host *shost = rport_to_shost(rport); | |
aedf3497 | 2213 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
1da177e4 LT |
2214 | unsigned long flags; |
2215 | int create = 0; | |
2216 | ||
1da177e4 | 2217 | spin_lock_irqsave(shost->host_lock, flags); |
19a7b4ae JSEC |
2218 | if (roles & FC_RPORT_ROLE_FCP_TARGET) { |
2219 | if (rport->scsi_target_id == -1) { | |
2220 | rport->scsi_target_id = fc_host->next_target_id++; | |
2221 | create = 1; | |
2222 | } else if (!(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) | |
2223 | create = 1; | |
1da177e4 | 2224 | } |
1da177e4 | 2225 | |
19a7b4ae JSEC |
2226 | rport->roles = roles; |
2227 | ||
aedf3497 JS |
2228 | spin_unlock_irqrestore(shost->host_lock, flags); |
2229 | ||
19a7b4ae JSEC |
2230 | if (create) { |
2231 | /* | |
2232 | * There may have been a delete timer running on the | |
2233 | * port. Ensure that it is cancelled as we now know | |
2234 | * the port is an FCP Target. | |
2235 | * Note: we know the rport is exists and in an online | |
2236 | * state as the LLDD would not have had an rport | |
2237 | * reference to pass us. | |
2238 | * | |
2239 | * Take no action on the del_timer failure as the state | |
2240 | * machine state change will validate the | |
2241 | * transaction. | |
2242 | */ | |
0f29b966 JS |
2243 | if (!cancel_delayed_work(&rport->fail_io_work)) |
2244 | fc_flush_devloss(shost); | |
19a7b4ae | 2245 | if (!cancel_delayed_work(&rport->dev_loss_work)) |
aedf3497 JS |
2246 | fc_flush_devloss(shost); |
2247 | ||
2248 | spin_lock_irqsave(shost->host_lock, flags); | |
2249 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; | |
2250 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2251 | ||
2252 | /* ensure any stgt delete functions are done */ | |
2253 | fc_flush_work(shost); | |
19a7b4ae | 2254 | |
1da177e4 | 2255 | /* initiate a scan of the target */ |
aedf3497 JS |
2256 | spin_lock_irqsave(shost->host_lock, flags); |
2257 | rport->flags |= FC_RPORT_SCAN_PENDING; | |
1da177e4 | 2258 | scsi_queue_work(shost, &rport->scan_work); |
aedf3497 | 2259 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf | 2260 | scsi_target_unblock(&rport->dev); |
19a7b4ae | 2261 | } |
1da177e4 LT |
2262 | } |
2263 | EXPORT_SYMBOL(fc_remote_port_rolechg); | |
2264 | ||
2265 | /** | |
19a7b4ae JSEC |
2266 | * fc_timeout_deleted_rport - Timeout handler for a deleted remote port that |
2267 | * was a SCSI target (thus was blocked), and failed | |
2268 | * to return in the alloted time. | |
2269 | * | |
2270 | * @data: rport target that failed to reappear in the alloted time. | |
1da177e4 LT |
2271 | **/ |
2272 | static void | |
19a7b4ae | 2273 | fc_timeout_deleted_rport(void *data) |
1da177e4 LT |
2274 | { |
2275 | struct fc_rport *rport = (struct fc_rport *)data; | |
19a7b4ae | 2276 | struct Scsi_Host *shost = rport_to_shost(rport); |
aedf3497 | 2277 | struct fc_host_attrs *fc_host = shost_to_fc_host(shost); |
19a7b4ae | 2278 | unsigned long flags; |
1da177e4 | 2279 | |
19a7b4ae | 2280 | spin_lock_irqsave(shost->host_lock, flags); |
1da177e4 | 2281 | |
aedf3497 JS |
2282 | rport->flags &= ~FC_RPORT_DEVLOSS_PENDING; |
2283 | ||
1da177e4 | 2284 | /* |
aedf3497 JS |
2285 | * If the port is ONLINE, then it came back. Validate it's still an |
2286 | * FCP target. If not, tear down the scsi_target on it. | |
1da177e4 | 2287 | */ |
aedf3497 JS |
2288 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
2289 | !(rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
19a7b4ae | 2290 | dev_printk(KERN_ERR, &rport->dev, |
aedf3497 JS |
2291 | "blocked FC remote port time out: no longer" |
2292 | " a FCP target, removing starget\n"); | |
aedf3497 | 2293 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2294 | scsi_target_unblock(&rport->dev); |
2295 | fc_queue_work(shost, &rport->stgt_delete_work); | |
19a7b4ae JSEC |
2296 | return; |
2297 | } | |
1da177e4 | 2298 | |
19a7b4ae JSEC |
2299 | if (rport->port_state != FC_PORTSTATE_BLOCKED) { |
2300 | spin_unlock_irqrestore(shost->host_lock, flags); | |
2301 | dev_printk(KERN_ERR, &rport->dev, | |
2302 | "blocked FC remote port time out: leaving target alone\n"); | |
2303 | return; | |
2304 | } | |
1da177e4 | 2305 | |
aedf3497 JS |
2306 | if (fc_host->tgtid_bind_type == FC_TGTID_BIND_NONE) { |
2307 | list_del(&rport->peers); | |
2308 | rport->port_state = FC_PORTSTATE_DELETED; | |
19a7b4ae JSEC |
2309 | dev_printk(KERN_ERR, &rport->dev, |
2310 | "blocked FC remote port time out: removing target\n"); | |
aedf3497 JS |
2311 | fc_queue_work(shost, &rport->rport_delete_work); |
2312 | spin_unlock_irqrestore(shost->host_lock, flags); | |
19a7b4ae JSEC |
2313 | return; |
2314 | } | |
1da177e4 | 2315 | |
19a7b4ae JSEC |
2316 | dev_printk(KERN_ERR, &rport->dev, |
2317 | "blocked FC remote port time out: removing target and " | |
2318 | "saving binding\n"); | |
2319 | ||
aedf3497 | 2320 | list_move_tail(&rport->peers, &fc_host->rport_bindings); |
1da177e4 LT |
2321 | |
2322 | /* | |
19a7b4ae JSEC |
2323 | * Note: We do not remove or clear the hostdata area. This allows |
2324 | * host-specific target data to persist along with the | |
2325 | * scsi_target_id. It's up to the host to manage it's hostdata area. | |
1da177e4 | 2326 | */ |
1da177e4 | 2327 | |
19a7b4ae JSEC |
2328 | /* |
2329 | * Reinitialize port attributes that may change if the port comes back. | |
2330 | */ | |
2331 | rport->maxframe_size = -1; | |
2332 | rport->supported_classes = FC_COS_UNSPECIFIED; | |
2333 | rport->roles = FC_RPORT_ROLE_UNKNOWN; | |
aedf3497 | 2334 | rport->port_state = FC_PORTSTATE_NOTPRESENT; |
1da177e4 | 2335 | |
19a7b4ae | 2336 | /* remove the identifiers that aren't used in the consisting binding */ |
aedf3497 | 2337 | switch (fc_host->tgtid_bind_type) { |
19a7b4ae JSEC |
2338 | case FC_TGTID_BIND_BY_WWPN: |
2339 | rport->node_name = -1; | |
2340 | rport->port_id = -1; | |
2341 | break; | |
2342 | case FC_TGTID_BIND_BY_WWNN: | |
2343 | rport->port_name = -1; | |
2344 | rport->port_id = -1; | |
2345 | break; | |
2346 | case FC_TGTID_BIND_BY_ID: | |
2347 | rport->node_name = -1; | |
2348 | rport->port_name = -1; | |
2349 | break; | |
2350 | case FC_TGTID_BIND_NONE: /* to keep compiler happy */ | |
2351 | break; | |
2352 | } | |
2353 | ||
19a7b4ae JSEC |
2354 | /* |
2355 | * As this only occurs if the remote port (scsi target) | |
2356 | * went away and didn't come back - we'll remove | |
2357 | * all attached scsi devices. | |
2358 | */ | |
42e33148 | 2359 | spin_unlock_irqrestore(shost->host_lock, flags); |
a0785edf JS |
2360 | |
2361 | scsi_target_unblock(&rport->dev); | |
2362 | fc_queue_work(shost, &rport->stgt_delete_work); | |
1da177e4 | 2363 | } |
1da177e4 | 2364 | |
0f29b966 JS |
2365 | /** |
2366 | * fc_timeout_fail_rport_io - Timeout handler for a fast io failing on a | |
2367 | * disconnected SCSI target. | |
2368 | * | |
2369 | * @data: rport to terminate io on. | |
2370 | * | |
2371 | * Notes: Only requests the failure of the io, not that all are flushed | |
2372 | * prior to returning. | |
2373 | **/ | |
2374 | static void | |
2375 | fc_timeout_fail_rport_io(void *data) | |
2376 | { | |
2377 | struct fc_rport *rport = (struct fc_rport *)data; | |
2378 | struct Scsi_Host *shost = rport_to_shost(rport); | |
2379 | struct fc_internal *i = to_fc_internal(shost->transportt); | |
2380 | ||
2381 | if (rport->port_state != FC_PORTSTATE_BLOCKED) | |
2382 | return; | |
2383 | ||
2384 | i->f->terminate_rport_io(rport); | |
2385 | } | |
2386 | ||
1da177e4 LT |
2387 | /** |
2388 | * fc_scsi_scan_rport - called to perform a scsi scan on a remote port. | |
19a7b4ae | 2389 | * |
1da177e4 LT |
2390 | * @data: remote port to be scanned. |
2391 | **/ | |
2392 | static void | |
2393 | fc_scsi_scan_rport(void *data) | |
2394 | { | |
2395 | struct fc_rport *rport = (struct fc_rport *)data; | |
aedf3497 | 2396 | struct Scsi_Host *shost = rport_to_shost(rport); |
42e33148 JSEC |
2397 | unsigned long flags; |
2398 | ||
aedf3497 JS |
2399 | if ((rport->port_state == FC_PORTSTATE_ONLINE) && |
2400 | (rport->roles & FC_RPORT_ROLE_FCP_TARGET)) { | |
aedf3497 JS |
2401 | scsi_scan_target(&rport->dev, rport->channel, |
2402 | rport->scsi_target_id, SCAN_WILD_CARD, 1); | |
42e33148 | 2403 | } |
aedf3497 JS |
2404 | |
2405 | spin_lock_irqsave(shost->host_lock, flags); | |
2406 | rport->flags &= ~FC_RPORT_SCAN_PENDING; | |
42e33148 JSEC |
2407 | spin_unlock_irqrestore(shost->host_lock, flags); |
2408 | } | |
2409 | ||
2410 | ||
1da177e4 LT |
2411 | MODULE_AUTHOR("Martin Hicks"); |
2412 | MODULE_DESCRIPTION("FC Transport Attributes"); | |
2413 | MODULE_LICENSE("GPL"); | |
2414 | ||
2415 | module_init(fc_transport_init); | |
2416 | module_exit(fc_transport_exit); |