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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * scsi_sysfs.c | |
3 | * | |
4 | * SCSI sysfs interface routines. | |
5 | * | |
6 | * Created to pull SCSI mid layer sysfs routines into one file. | |
7 | */ | |
8 | ||
1da177e4 | 9 | #include <linux/module.h> |
5a0e3ad6 | 10 | #include <linux/slab.h> |
1da177e4 LT |
11 | #include <linux/init.h> |
12 | #include <linux/blkdev.h> | |
13 | #include <linux/device.h> | |
bc4f2401 | 14 | #include <linux/pm_runtime.h> |
1da177e4 LT |
15 | |
16 | #include <scsi/scsi.h> | |
17 | #include <scsi/scsi_device.h> | |
18 | #include <scsi/scsi_host.h> | |
19 | #include <scsi/scsi_tcq.h> | |
20 | #include <scsi/scsi_transport.h> | |
44818efb | 21 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
22 | |
23 | #include "scsi_priv.h" | |
24 | #include "scsi_logging.h" | |
25 | ||
b0ed4336 HR |
26 | static struct device_type scsi_dev_type; |
27 | ||
0ad78200 | 28 | static const struct { |
1da177e4 LT |
29 | enum scsi_device_state value; |
30 | char *name; | |
31 | } sdev_states[] = { | |
32 | { SDEV_CREATED, "created" }, | |
33 | { SDEV_RUNNING, "running" }, | |
34 | { SDEV_CANCEL, "cancel" }, | |
35 | { SDEV_DEL, "deleted" }, | |
36 | { SDEV_QUIESCE, "quiesce" }, | |
37 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 38 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 39 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 40 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
41 | }; |
42 | ||
43 | const char *scsi_device_state_name(enum scsi_device_state state) | |
44 | { | |
45 | int i; | |
46 | char *name = NULL; | |
47 | ||
6391a113 | 48 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
49 | if (sdev_states[i].value == state) { |
50 | name = sdev_states[i].name; | |
51 | break; | |
52 | } | |
53 | } | |
54 | return name; | |
55 | } | |
56 | ||
0ad78200 | 57 | static const struct { |
d3301874 MA |
58 | enum scsi_host_state value; |
59 | char *name; | |
60 | } shost_states[] = { | |
61 | { SHOST_CREATED, "created" }, | |
62 | { SHOST_RUNNING, "running" }, | |
63 | { SHOST_CANCEL, "cancel" }, | |
64 | { SHOST_DEL, "deleted" }, | |
65 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
66 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
67 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
68 | }; |
69 | const char *scsi_host_state_name(enum scsi_host_state state) | |
70 | { | |
71 | int i; | |
72 | char *name = NULL; | |
73 | ||
6391a113 | 74 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
75 | if (shost_states[i].value == state) { |
76 | name = shost_states[i].name; | |
77 | break; | |
78 | } | |
79 | } | |
80 | return name; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int check_set(unsigned int *val, char *src) |
84 | { | |
85 | char *last; | |
86 | ||
87 | if (strncmp(src, "-", 20) == 0) { | |
88 | *val = SCAN_WILD_CARD; | |
89 | } else { | |
90 | /* | |
91 | * Doesn't check for int overflow | |
92 | */ | |
93 | *val = simple_strtoul(src, &last, 0); | |
94 | if (*last != '\0') | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
101 | { | |
102 | char s1[15], s2[15], s3[15], junk; | |
103 | unsigned int channel, id, lun; | |
104 | int res; | |
105 | ||
106 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
107 | if (res != 3) | |
108 | return -EINVAL; | |
109 | if (check_set(&channel, s1)) | |
110 | return -EINVAL; | |
111 | if (check_set(&id, s2)) | |
112 | return -EINVAL; | |
113 | if (check_set(&lun, s3)) | |
114 | return -EINVAL; | |
e02f3f59 CH |
115 | if (shost->transportt->user_scan) |
116 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
117 | else | |
118 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
119 | return res; |
120 | } | |
121 | ||
122 | /* | |
123 | * shost_show_function: macro to create an attr function that can be used to | |
124 | * show a non-bit field. | |
125 | */ | |
126 | #define shost_show_function(name, field, format_string) \ | |
127 | static ssize_t \ | |
ee959b00 TJ |
128 | show_##name (struct device *dev, struct device_attribute *attr, \ |
129 | char *buf) \ | |
1da177e4 | 130 | { \ |
ee959b00 | 131 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
132 | return snprintf (buf, 20, format_string, shost->field); \ |
133 | } | |
134 | ||
135 | /* | |
136 | * shost_rd_attr: macro to create a function and attribute variable for a | |
137 | * read only field. | |
138 | */ | |
139 | #define shost_rd_attr2(name, field, format_string) \ | |
140 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 141 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
142 | |
143 | #define shost_rd_attr(field, format_string) \ | |
144 | shost_rd_attr2(field, field, format_string) | |
145 | ||
146 | /* | |
147 | * Create the actual show/store functions and data structures. | |
148 | */ | |
149 | ||
ee959b00 TJ |
150 | static ssize_t |
151 | store_scan(struct device *dev, struct device_attribute *attr, | |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
ee959b00 | 154 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
155 | int res; |
156 | ||
157 | res = scsi_scan(shost, buf); | |
158 | if (res == 0) | |
159 | res = count; | |
160 | return res; | |
161 | }; | |
ee959b00 | 162 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 163 | |
d3301874 | 164 | static ssize_t |
ee959b00 TJ |
165 | store_shost_state(struct device *dev, struct device_attribute *attr, |
166 | const char *buf, size_t count) | |
d3301874 MA |
167 | { |
168 | int i; | |
ee959b00 | 169 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
170 | enum scsi_host_state state = 0; |
171 | ||
6391a113 | 172 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
173 | const int len = strlen(shost_states[i].name); |
174 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
175 | buf[len] == '\n') { | |
176 | state = shost_states[i].value; | |
177 | break; | |
178 | } | |
179 | } | |
180 | if (!state) | |
181 | return -EINVAL; | |
182 | ||
183 | if (scsi_host_set_state(shost, state)) | |
184 | return -EINVAL; | |
185 | return count; | |
186 | } | |
187 | ||
188 | static ssize_t | |
ee959b00 | 189 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 190 | { |
ee959b00 | 191 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
192 | const char *name = scsi_host_state_name(shost->shost_state); |
193 | ||
194 | if (!name) | |
195 | return -EINVAL; | |
196 | ||
197 | return snprintf(buf, 20, "%s\n", name); | |
198 | } | |
199 | ||
ee959b00 TJ |
200 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
201 | struct device_attribute dev_attr_hstate = | |
202 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
d3301874 | 203 | |
5dc2b89e FT |
204 | static ssize_t |
205 | show_shost_mode(unsigned int mode, char *buf) | |
206 | { | |
207 | ssize_t len = 0; | |
208 | ||
209 | if (mode & MODE_INITIATOR) | |
210 | len = sprintf(buf, "%s", "Initiator"); | |
211 | ||
212 | if (mode & MODE_TARGET) | |
213 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
214 | ||
215 | len += sprintf(buf + len, "\n"); | |
216 | ||
217 | return len; | |
218 | } | |
219 | ||
ee959b00 TJ |
220 | static ssize_t |
221 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
222 | char *buf) | |
5dc2b89e | 223 | { |
ee959b00 | 224 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 225 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 226 | |
7a39ac3f JB |
227 | if (supported_mode == MODE_UNKNOWN) |
228 | /* by default this should be initiator */ | |
229 | supported_mode = MODE_INITIATOR; | |
230 | ||
231 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
232 | } |
233 | ||
ee959b00 | 234 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 235 | |
ee959b00 TJ |
236 | static ssize_t |
237 | show_shost_active_mode(struct device *dev, | |
238 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 239 | { |
ee959b00 | 240 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
241 | |
242 | if (shost->active_mode == MODE_UNKNOWN) | |
243 | return snprintf(buf, 20, "unknown\n"); | |
244 | else | |
245 | return show_shost_mode(shost->active_mode, buf); | |
246 | } | |
247 | ||
ee959b00 | 248 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 249 | |
072f19b4 | 250 | static int check_reset_type(const char *str) |
29443691 | 251 | { |
072f19b4 | 252 | if (sysfs_streq(str, "adapter")) |
29443691 | 253 | return SCSI_ADAPTER_RESET; |
072f19b4 | 254 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
255 | return SCSI_FIRMWARE_RESET; |
256 | else | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static ssize_t | |
261 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
262 | const char *buf, size_t count) | |
263 | { | |
264 | struct Scsi_Host *shost = class_to_shost(dev); | |
265 | struct scsi_host_template *sht = shost->hostt; | |
266 | int ret = -EINVAL; | |
29443691 VC |
267 | int type; |
268 | ||
072f19b4 | 269 | type = check_reset_type(buf); |
29443691 VC |
270 | if (!type) |
271 | goto exit_store_host_reset; | |
272 | ||
273 | if (sht->host_reset) | |
274 | ret = sht->host_reset(shost, type); | |
275 | ||
276 | exit_store_host_reset: | |
277 | if (ret == 0) | |
278 | ret = count; | |
279 | return ret; | |
280 | } | |
281 | ||
282 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
283 | ||
1da177e4 LT |
284 | shost_rd_attr(unique_id, "%u\n"); |
285 | shost_rd_attr(host_busy, "%hu\n"); | |
286 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 287 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 288 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 289 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 290 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
291 | shost_rd_attr(prot_capabilities, "%u\n"); |
292 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
293 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
294 | ||
f7120a4f HR |
295 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
296 | &dev_attr_unique_id.attr, | |
297 | &dev_attr_host_busy.attr, | |
298 | &dev_attr_cmd_per_lun.attr, | |
299 | &dev_attr_can_queue.attr, | |
300 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 301 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
302 | &dev_attr_unchecked_isa_dma.attr, |
303 | &dev_attr_proc_name.attr, | |
304 | &dev_attr_scan.attr, | |
305 | &dev_attr_hstate.attr, | |
306 | &dev_attr_supported_mode.attr, | |
307 | &dev_attr_active_mode.attr, | |
4469f987 MP |
308 | &dev_attr_prot_capabilities.attr, |
309 | &dev_attr_prot_guard_type.attr, | |
29443691 | 310 | &dev_attr_host_reset.attr, |
f7120a4f HR |
311 | NULL |
312 | }; | |
313 | ||
314 | struct attribute_group scsi_shost_attr_group = { | |
315 | .attrs = scsi_sysfs_shost_attrs, | |
316 | }; | |
317 | ||
a4dbd674 | 318 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 319 | &scsi_shost_attr_group, |
1da177e4 LT |
320 | NULL |
321 | }; | |
322 | ||
ee959b00 | 323 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
324 | { |
325 | struct scsi_device *sdev; | |
326 | ||
327 | sdev = class_to_sdev(class_dev); | |
328 | put_device(&sdev->sdev_gendev); | |
329 | } | |
330 | ||
65f27f38 | 331 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
332 | { |
333 | struct scsi_device *sdev; | |
334 | struct device *parent; | |
335 | struct scsi_target *starget; | |
a341cd0f | 336 | struct list_head *this, *tmp; |
1da177e4 LT |
337 | unsigned long flags; |
338 | ||
65f27f38 DH |
339 | sdev = container_of(work, struct scsi_device, ew.work); |
340 | ||
341 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
342 | starget = to_scsi_target(parent); |
343 | ||
344 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
345 | starget->reap_ref++; | |
346 | list_del(&sdev->siblings); | |
347 | list_del(&sdev->same_target_siblings); | |
348 | list_del(&sdev->starved_entry); | |
349 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
350 | ||
a341cd0f JG |
351 | cancel_work_sync(&sdev->event_work); |
352 | ||
353 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
354 | struct scsi_event *evt; | |
355 | ||
356 | evt = list_entry(this, struct scsi_event, node); | |
357 | list_del(&evt->node); | |
358 | kfree(evt); | |
359 | } | |
360 | ||
e73e079b | 361 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
362 | /* NULL queue means the device can't be used */ |
363 | sdev->request_queue = NULL; | |
1da177e4 LT |
364 | |
365 | scsi_target_reap(scsi_target(sdev)); | |
366 | ||
367 | kfree(sdev->inquiry); | |
368 | kfree(sdev); | |
369 | ||
370 | if (parent) | |
371 | put_device(parent); | |
372 | } | |
373 | ||
65110b21 JB |
374 | static void scsi_device_dev_release(struct device *dev) |
375 | { | |
ffedb452 | 376 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 377 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 378 | &sdp->ew); |
65110b21 JB |
379 | } |
380 | ||
52c1da39 | 381 | static struct class sdev_class = { |
1da177e4 | 382 | .name = "scsi_device", |
ee959b00 | 383 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
384 | }; |
385 | ||
386 | /* all probing is done in the individual ->probe routines */ | |
387 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
388 | { | |
b0ed4336 HR |
389 | struct scsi_device *sdp; |
390 | ||
391 | if (dev->type != &scsi_dev_type) | |
392 | return 0; | |
393 | ||
394 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
395 | if (sdp->no_uld_attach) |
396 | return 0; | |
397 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
398 | } | |
399 | ||
7eff2e7a | 400 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 401 | { |
1f42ea7b JB |
402 | struct scsi_device *sdev; |
403 | ||
404 | if (dev->type != &scsi_dev_type) | |
405 | return 0; | |
406 | ||
407 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 408 | |
7eff2e7a | 409 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
410 | return 0; |
411 | } | |
412 | ||
1da177e4 LT |
413 | struct bus_type scsi_bus_type = { |
414 | .name = "scsi", | |
415 | .match = scsi_bus_match, | |
d7b8bcb0 | 416 | .uevent = scsi_bus_uevent, |
aa338601 | 417 | #ifdef CONFIG_PM |
db5bd1e0 | 418 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 419 | #endif |
1da177e4 | 420 | }; |
a6a8d9f8 | 421 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
422 | |
423 | int scsi_sysfs_register(void) | |
424 | { | |
425 | int error; | |
426 | ||
427 | error = bus_register(&scsi_bus_type); | |
428 | if (!error) { | |
429 | error = class_register(&sdev_class); | |
430 | if (error) | |
431 | bus_unregister(&scsi_bus_type); | |
432 | } | |
433 | ||
434 | return error; | |
435 | } | |
436 | ||
437 | void scsi_sysfs_unregister(void) | |
438 | { | |
439 | class_unregister(&sdev_class); | |
440 | bus_unregister(&scsi_bus_type); | |
441 | } | |
442 | ||
443 | /* | |
444 | * sdev_show_function: macro to create an attr function that can be used to | |
445 | * show a non-bit field. | |
446 | */ | |
447 | #define sdev_show_function(field, format_string) \ | |
448 | static ssize_t \ | |
ee959b00 TJ |
449 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
450 | char *buf) \ | |
1da177e4 LT |
451 | { \ |
452 | struct scsi_device *sdev; \ | |
453 | sdev = to_scsi_device(dev); \ | |
454 | return snprintf (buf, 20, format_string, sdev->field); \ | |
455 | } \ | |
456 | ||
457 | /* | |
458 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
459 | * read only field. | |
460 | */ | |
461 | #define sdev_rd_attr(field, format_string) \ | |
462 | sdev_show_function(field, format_string) \ | |
463 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
464 | ||
465 | ||
466 | /* | |
160e7f67 | 467 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
468 | * read/write field. |
469 | */ | |
470 | #define sdev_rw_attr(field, format_string) \ | |
471 | sdev_show_function(field, format_string) \ | |
472 | \ | |
473 | static ssize_t \ | |
ee959b00 TJ |
474 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
475 | const char *buf, size_t count) \ | |
1da177e4 LT |
476 | { \ |
477 | struct scsi_device *sdev; \ | |
478 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 479 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
480 | return count; \ |
481 | } \ | |
482 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
483 | ||
484 | /* Currently we don't export bit fields, but we might in future, | |
485 | * so leave this code in */ | |
486 | #if 0 | |
487 | /* | |
488 | * sdev_rd_attr: create a function and attribute variable for a | |
489 | * read/write bit field. | |
490 | */ | |
491 | #define sdev_rw_attr_bit(field) \ | |
492 | sdev_show_function(field, "%d\n") \ | |
493 | \ | |
494 | static ssize_t \ | |
ee959b00 TJ |
495 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
496 | const char *buf, size_t count) \ | |
1da177e4 LT |
497 | { \ |
498 | int ret; \ | |
499 | struct scsi_device *sdev; \ | |
500 | ret = scsi_sdev_check_buf_bit(buf); \ | |
501 | if (ret >= 0) { \ | |
502 | sdev = to_scsi_device(dev); \ | |
503 | sdev->field = ret; \ | |
504 | ret = count; \ | |
505 | } \ | |
506 | return ret; \ | |
507 | } \ | |
508 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
509 | ||
510 | /* | |
511 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
512 | * else return -EINVAL. | |
513 | */ | |
514 | static int scsi_sdev_check_buf_bit(const char *buf) | |
515 | { | |
516 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
517 | if (buf[0] == '1') | |
518 | return 1; | |
519 | else if (buf[0] == '0') | |
520 | return 0; | |
521 | else | |
522 | return -EINVAL; | |
523 | } else | |
524 | return -EINVAL; | |
525 | } | |
526 | #endif | |
527 | /* | |
528 | * Create the actual show/store functions and data structures. | |
529 | */ | |
530 | sdev_rd_attr (device_blocked, "%d\n"); | |
531 | sdev_rd_attr (queue_depth, "%d\n"); | |
532 | sdev_rd_attr (type, "%d\n"); | |
533 | sdev_rd_attr (scsi_level, "%d\n"); | |
534 | sdev_rd_attr (vendor, "%.8s\n"); | |
535 | sdev_rd_attr (model, "%.16s\n"); | |
536 | sdev_rd_attr (rev, "%.4s\n"); | |
537 | ||
242f9dcb JA |
538 | /* |
539 | * TODO: can we make these symlinks to the block layer ones? | |
540 | */ | |
1da177e4 | 541 | static ssize_t |
10523b3b | 542 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
543 | { |
544 | struct scsi_device *sdev; | |
545 | sdev = to_scsi_device(dev); | |
242f9dcb | 546 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
547 | } |
548 | ||
549 | static ssize_t | |
ee959b00 TJ |
550 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
551 | const char *buf, size_t count) | |
1da177e4 LT |
552 | { |
553 | struct scsi_device *sdev; | |
554 | int timeout; | |
555 | sdev = to_scsi_device(dev); | |
556 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 557 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
558 | return count; |
559 | } | |
560 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
561 | ||
0816c925 MP |
562 | static ssize_t |
563 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
564 | { | |
565 | struct scsi_device *sdev; | |
566 | sdev = to_scsi_device(dev); | |
567 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
568 | } | |
569 | ||
570 | static ssize_t | |
571 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
572 | const char *buf, size_t count) | |
573 | { | |
574 | struct scsi_device *sdev; | |
575 | unsigned int eh_timeout; | |
576 | int err; | |
577 | ||
578 | if (!capable(CAP_SYS_ADMIN)) | |
579 | return -EACCES; | |
580 | ||
581 | sdev = to_scsi_device(dev); | |
582 | err = kstrtouint(buf, 10, &eh_timeout); | |
583 | if (err) | |
584 | return err; | |
585 | sdev->eh_timeout = eh_timeout * HZ; | |
586 | ||
587 | return count; | |
588 | } | |
589 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
590 | ||
1da177e4 | 591 | static ssize_t |
ee959b00 TJ |
592 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
593 | const char *buf, size_t count) | |
1da177e4 LT |
594 | { |
595 | scsi_rescan_device(dev); | |
596 | return count; | |
597 | } | |
598 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
599 | ||
d9a9cdfb AS |
600 | static void sdev_store_delete_callback(struct device *dev) |
601 | { | |
602 | scsi_remove_device(to_scsi_device(dev)); | |
603 | } | |
604 | ||
ee959b00 TJ |
605 | static ssize_t |
606 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
607 | const char *buf, size_t count) | |
1da177e4 | 608 | { |
d9a9cdfb AS |
609 | int rc; |
610 | ||
611 | /* An attribute cannot be unregistered by one of its own methods, | |
612 | * so we have to use this roundabout approach. | |
613 | */ | |
614 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
615 | if (rc) | |
616 | count = rc; | |
1da177e4 LT |
617 | return count; |
618 | }; | |
619 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
620 | ||
621 | static ssize_t | |
ee959b00 TJ |
622 | store_state_field(struct device *dev, struct device_attribute *attr, |
623 | const char *buf, size_t count) | |
1da177e4 LT |
624 | { |
625 | int i; | |
626 | struct scsi_device *sdev = to_scsi_device(dev); | |
627 | enum scsi_device_state state = 0; | |
628 | ||
6391a113 | 629 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
630 | const int len = strlen(sdev_states[i].name); |
631 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
632 | buf[len] == '\n') { | |
633 | state = sdev_states[i].value; | |
634 | break; | |
635 | } | |
636 | } | |
637 | if (!state) | |
638 | return -EINVAL; | |
639 | ||
640 | if (scsi_device_set_state(sdev, state)) | |
641 | return -EINVAL; | |
642 | return count; | |
643 | } | |
644 | ||
645 | static ssize_t | |
10523b3b | 646 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
647 | { |
648 | struct scsi_device *sdev = to_scsi_device(dev); | |
649 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
650 | ||
651 | if (!name) | |
652 | return -EINVAL; | |
653 | ||
654 | return snprintf(buf, 20, "%s\n", name); | |
655 | } | |
656 | ||
657 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
658 | ||
659 | static ssize_t | |
ee959b00 TJ |
660 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
661 | char *buf) | |
1da177e4 LT |
662 | { |
663 | struct scsi_device *sdev = to_scsi_device(dev); | |
664 | const char *name = "none"; | |
665 | ||
666 | if (sdev->ordered_tags) | |
667 | name = "ordered"; | |
668 | else if (sdev->simple_tags) | |
669 | name = "simple"; | |
670 | ||
671 | return snprintf(buf, 20, "%s\n", name); | |
672 | } | |
673 | ||
674 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
675 | ||
676 | static ssize_t | |
ee959b00 | 677 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
678 | { |
679 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
680 | } | |
681 | ||
682 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
683 | ||
684 | #define show_sdev_iostat(field) \ | |
685 | static ssize_t \ | |
ee959b00 TJ |
686 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
687 | char *buf) \ | |
1da177e4 LT |
688 | { \ |
689 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
690 | unsigned long long count = atomic_read(&sdev->field); \ | |
691 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
692 | } \ | |
693 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
694 | ||
695 | show_sdev_iostat(iorequest_cnt); | |
696 | show_sdev_iostat(iodone_cnt); | |
697 | show_sdev_iostat(ioerr_cnt); | |
698 | ||
d7b8bcb0 MT |
699 | static ssize_t |
700 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
701 | { | |
702 | struct scsi_device *sdev; | |
703 | sdev = to_scsi_device(dev); | |
704 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
705 | } | |
706 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 707 | |
a341cd0f JG |
708 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
709 | static ssize_t \ | |
710 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 711 | char *buf) \ |
a341cd0f JG |
712 | { \ |
713 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
714 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
715 | return snprintf(buf, 20, "%d\n", val); \ | |
716 | } | |
717 | ||
718 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
719 | static ssize_t \ | |
ee959b00 | 720 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
721 | const char *buf, size_t count) \ |
722 | { \ | |
723 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
724 | int val = simple_strtoul(buf, NULL, 0); \ | |
725 | if (val == 0) \ | |
726 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
727 | else if (val == 1) \ | |
728 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
729 | else \ | |
730 | return -EINVAL; \ | |
731 | return count; \ | |
732 | } | |
733 | ||
734 | #define DECLARE_EVT(name, Cap_name) \ | |
735 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
736 | DECLARE_EVT_STORE(name, Cap_name) \ | |
737 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
738 | sdev_store_evt_##name); | |
739 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
740 | ||
741 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
742 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
743 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
744 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
745 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
746 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 747 | |
1da177e4 | 748 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
749 | static struct attribute *scsi_sdev_attrs[] = { |
750 | &dev_attr_device_blocked.attr, | |
751 | &dev_attr_type.attr, | |
752 | &dev_attr_scsi_level.attr, | |
753 | &dev_attr_vendor.attr, | |
754 | &dev_attr_model.attr, | |
755 | &dev_attr_rev.attr, | |
756 | &dev_attr_rescan.attr, | |
757 | &dev_attr_delete.attr, | |
758 | &dev_attr_state.attr, | |
759 | &dev_attr_timeout.attr, | |
0816c925 | 760 | &dev_attr_eh_timeout.attr, |
bfd12944 KS |
761 | &dev_attr_iocounterbits.attr, |
762 | &dev_attr_iorequest_cnt.attr, | |
763 | &dev_attr_iodone_cnt.attr, | |
764 | &dev_attr_ioerr_cnt.attr, | |
765 | &dev_attr_modalias.attr, | |
a341cd0f | 766 | REF_EVT(media_change), |
279afdfe EM |
767 | REF_EVT(inquiry_change_reported), |
768 | REF_EVT(capacity_change_reported), | |
769 | REF_EVT(soft_threshold_reached), | |
770 | REF_EVT(mode_parameter_change_reported), | |
771 | REF_EVT(lun_change_reported), | |
bfd12944 KS |
772 | NULL |
773 | }; | |
774 | ||
775 | static struct attribute_group scsi_sdev_attr_group = { | |
776 | .attrs = scsi_sdev_attrs, | |
777 | }; | |
778 | ||
a4dbd674 | 779 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
bfd12944 | 780 | &scsi_sdev_attr_group, |
1da177e4 LT |
781 | NULL |
782 | }; | |
783 | ||
ee959b00 TJ |
784 | static ssize_t |
785 | sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
1da177e4 LT |
787 | { |
788 | int depth, retval; | |
789 | struct scsi_device *sdev = to_scsi_device(dev); | |
790 | struct scsi_host_template *sht = sdev->host->hostt; | |
791 | ||
792 | if (!sht->change_queue_depth) | |
793 | return -EINVAL; | |
794 | ||
795 | depth = simple_strtoul(buf, NULL, 0); | |
796 | ||
797 | if (depth < 1) | |
798 | return -EINVAL; | |
799 | ||
e881a172 MC |
800 | retval = sht->change_queue_depth(sdev, depth, |
801 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
802 | if (retval < 0) |
803 | return retval; | |
804 | ||
4a84067d VD |
805 | sdev->max_queue_depth = sdev->queue_depth; |
806 | ||
1da177e4 LT |
807 | return count; |
808 | } | |
809 | ||
810 | static struct device_attribute sdev_attr_queue_depth_rw = | |
811 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
812 | sdev_store_queue_depth_rw); | |
813 | ||
4a84067d VD |
814 | static ssize_t |
815 | sdev_show_queue_ramp_up_period(struct device *dev, | |
816 | struct device_attribute *attr, | |
817 | char *buf) | |
818 | { | |
819 | struct scsi_device *sdev; | |
820 | sdev = to_scsi_device(dev); | |
821 | return snprintf(buf, 20, "%u\n", | |
822 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
823 | } | |
824 | ||
825 | static ssize_t | |
826 | sdev_store_queue_ramp_up_period(struct device *dev, | |
827 | struct device_attribute *attr, | |
828 | const char *buf, size_t count) | |
829 | { | |
830 | struct scsi_device *sdev = to_scsi_device(dev); | |
831 | unsigned long period; | |
832 | ||
833 | if (strict_strtoul(buf, 10, &period)) | |
834 | return -EINVAL; | |
835 | ||
836 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
837 | return period; | |
838 | } | |
839 | ||
840 | static struct device_attribute sdev_attr_queue_ramp_up_period = | |
841 | __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, | |
842 | sdev_show_queue_ramp_up_period, | |
843 | sdev_store_queue_ramp_up_period); | |
844 | ||
ee959b00 TJ |
845 | static ssize_t |
846 | sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, | |
847 | const char *buf, size_t count) | |
1da177e4 LT |
848 | { |
849 | struct scsi_device *sdev = to_scsi_device(dev); | |
850 | struct scsi_host_template *sht = sdev->host->hostt; | |
851 | int tag_type = 0, retval; | |
852 | int prev_tag_type = scsi_get_tag_type(sdev); | |
853 | ||
854 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
855 | return -EINVAL; | |
856 | ||
857 | if (strncmp(buf, "ordered", 7) == 0) | |
858 | tag_type = MSG_ORDERED_TAG; | |
859 | else if (strncmp(buf, "simple", 6) == 0) | |
860 | tag_type = MSG_SIMPLE_TAG; | |
861 | else if (strncmp(buf, "none", 4) != 0) | |
862 | return -EINVAL; | |
863 | ||
864 | if (tag_type == prev_tag_type) | |
865 | return count; | |
866 | ||
867 | retval = sht->change_queue_type(sdev, tag_type); | |
868 | if (retval < 0) | |
869 | return retval; | |
870 | ||
871 | return count; | |
872 | } | |
873 | ||
643eb2d9 JB |
874 | static int scsi_target_add(struct scsi_target *starget) |
875 | { | |
876 | int error; | |
877 | ||
878 | if (starget->state != STARGET_CREATED) | |
879 | return 0; | |
880 | ||
881 | error = device_add(&starget->dev); | |
882 | if (error) { | |
883 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
884 | return error; |
885 | } | |
886 | transport_add_device(&starget->dev); | |
887 | starget->state = STARGET_RUNNING; | |
888 | ||
bc4f2401 AS |
889 | pm_runtime_set_active(&starget->dev); |
890 | pm_runtime_enable(&starget->dev); | |
891 | device_enable_async_suspend(&starget->dev); | |
892 | ||
643eb2d9 JB |
893 | return 0; |
894 | } | |
895 | ||
1da177e4 LT |
896 | static struct device_attribute sdev_attr_queue_type_rw = |
897 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
898 | sdev_store_queue_type_rw); | |
899 | ||
1da177e4 LT |
900 | /** |
901 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
902 | * @sdev: scsi_device to add | |
903 | * | |
904 | * Return value: | |
905 | * 0 on Success / non-zero on Failure | |
906 | **/ | |
907 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
908 | { | |
909 | int error, i; | |
80ed71ce | 910 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 911 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 912 | |
ee37e09d AS |
913 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
914 | if (error) | |
1da177e4 LT |
915 | return error; |
916 | ||
643eb2d9 JB |
917 | error = scsi_target_add(starget); |
918 | if (error) | |
919 | return error; | |
920 | ||
921 | transport_configure_device(&starget->dev); | |
bc4f2401 | 922 | |
4cb077d9 | 923 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
924 | scsi_autopm_get_target(starget); |
925 | pm_runtime_set_active(&sdev->sdev_gendev); | |
926 | pm_runtime_forbid(&sdev->sdev_gendev); | |
927 | pm_runtime_enable(&sdev->sdev_gendev); | |
928 | scsi_autopm_put_target(starget); | |
929 | ||
930 | /* The following call will keep sdev active indefinitely, until | |
931 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
932 | * drivers supporting autosuspend will do this. | |
933 | */ | |
934 | scsi_autopm_get_device(sdev); | |
935 | ||
1da177e4 LT |
936 | error = device_add(&sdev->sdev_gendev); |
937 | if (error) { | |
73d8c34f AS |
938 | sdev_printk(KERN_INFO, sdev, |
939 | "failed to add device: %d\n", error); | |
ee37e09d | 940 | return error; |
1da177e4 | 941 | } |
4cb077d9 | 942 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 943 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 944 | if (error) { |
73d8c34f AS |
945 | sdev_printk(KERN_INFO, sdev, |
946 | "failed to add class device: %d\n", error); | |
860dc736 | 947 | device_del(&sdev->sdev_gendev); |
ee37e09d | 948 | return error; |
1da177e4 | 949 | } |
860dc736 JB |
950 | transport_add_device(&sdev->sdev_gendev); |
951 | sdev->is_visible = 1; | |
1da177e4 | 952 | |
bfd12944 | 953 | /* create queue files, which may be writable, depending on the host */ |
4a84067d VD |
954 | if (sdev->host->hostt->change_queue_depth) { |
955 | error = device_create_file(&sdev->sdev_gendev, | |
956 | &sdev_attr_queue_depth_rw); | |
957 | error = device_create_file(&sdev->sdev_gendev, | |
958 | &sdev_attr_queue_ramp_up_period); | |
959 | } | |
bfd12944 KS |
960 | else |
961 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
860dc736 | 962 | if (error) |
ee37e09d | 963 | return error; |
860dc736 | 964 | |
bfd12944 KS |
965 | if (sdev->host->hostt->change_queue_type) |
966 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
967 | else | |
968 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
860dc736 | 969 | if (error) |
ee37e09d | 970 | return error; |
bfd12944 | 971 | |
97f46ae4 | 972 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
973 | |
974 | if (error) | |
860dc736 JB |
975 | /* we're treating error on bsg register as non-fatal, |
976 | * so pretend nothing went wrong */ | |
80ed71ce JB |
977 | sdev_printk(KERN_INFO, sdev, |
978 | "Failed to register bsg queue, errno=%d\n", error); | |
979 | ||
bfd12944 | 980 | /* add additional host specific attributes */ |
1da177e4 LT |
981 | if (sdev->host->hostt->sdev_attrs) { |
982 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 983 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 984 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 985 | if (error) |
ee37e09d | 986 | return error; |
1da177e4 LT |
987 | } |
988 | } | |
1da177e4 | 989 | |
1da177e4 LT |
990 | return error; |
991 | } | |
992 | ||
903f4fed | 993 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 994 | { |
df133c21 JB |
995 | struct device *dev = &sdev->sdev_gendev; |
996 | ||
860dc736 JB |
997 | if (sdev->is_visible) { |
998 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
999 | return; | |
1da177e4 | 1000 | |
860dc736 JB |
1001 | bsg_unregister_queue(sdev->request_queue); |
1002 | device_unregister(&sdev->sdev_dev); | |
1003 | transport_remove_device(dev); | |
1004 | device_del(dev); | |
1005 | } else | |
1006 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1007 | |
1008 | /* | |
1009 | * Stop accepting new requests and wait until all queuecommand() and | |
1010 | * scsi_run_queue() invocations have finished before tearing down the | |
1011 | * device. | |
1012 | */ | |
1da177e4 | 1013 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1014 | blk_cleanup_queue(sdev->request_queue); |
1015 | cancel_work_sync(&sdev->requeue_work); | |
1016 | ||
1da177e4 LT |
1017 | if (sdev->host->hostt->slave_destroy) |
1018 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1019 | transport_destroy_device(dev); |
86cbfb56 | 1020 | |
df133c21 | 1021 | put_device(dev); |
903f4fed AS |
1022 | } |
1023 | ||
1024 | /** | |
1025 | * scsi_remove_device - unregister a device from the scsi bus | |
1026 | * @sdev: scsi_device to unregister | |
1027 | **/ | |
1028 | void scsi_remove_device(struct scsi_device *sdev) | |
1029 | { | |
54195002 AS |
1030 | struct Scsi_Host *shost = sdev->host; |
1031 | ||
0b950672 | 1032 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1033 | __scsi_remove_device(sdev); |
0b950672 | 1034 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1035 | } |
1036 | EXPORT_SYMBOL(scsi_remove_device); | |
1037 | ||
44818efb | 1038 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1039 | { |
1040 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1041 | unsigned long flags; | |
a64358db | 1042 | struct scsi_device *sdev; |
1da177e4 LT |
1043 | |
1044 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1045 | restart: |
1046 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1047 | if (sdev->channel != starget->channel || |
a64358db | 1048 | sdev->id != starget->id || |
546ae796 | 1049 | scsi_device_get(sdev)) |
1da177e4 LT |
1050 | continue; |
1051 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1052 | scsi_remove_device(sdev); | |
546ae796 | 1053 | scsi_device_put(sdev); |
1da177e4 | 1054 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1055 | goto restart; |
1da177e4 LT |
1056 | } |
1057 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 PM |
1058 | } |
1059 | ||
1da177e4 LT |
1060 | /** |
1061 | * scsi_remove_target - try to remove a target and all its devices | |
1062 | * @dev: generic starget or parent of generic stargets to be removed | |
1063 | * | |
1064 | * Note: This is slightly racy. It is possible that if the user | |
1065 | * requests the addition of another device then the target won't be | |
1066 | * removed. | |
1067 | */ | |
1068 | void scsi_remove_target(struct device *dev) | |
1069 | { | |
3b661a92 | 1070 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
bc3f02a7 | 1071 | struct scsi_target *starget, *last = NULL; |
3b661a92 DW |
1072 | unsigned long flags; |
1073 | ||
bc3f02a7 DW |
1074 | /* remove targets being careful to lookup next entry before |
1075 | * deleting the last | |
1076 | */ | |
3b661a92 DW |
1077 | spin_lock_irqsave(shost->host_lock, flags); |
1078 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1079 | if (starget->state == STARGET_DEL) | |
1080 | continue; | |
1081 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
bc3f02a7 DW |
1082 | /* assuming new targets arrive at the end */ |
1083 | starget->reap_ref++; | |
1084 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1085 | if (last) | |
1086 | scsi_target_reap(last); | |
1087 | last = starget; | |
1088 | __scsi_remove_target(starget); | |
1089 | spin_lock_irqsave(shost->host_lock, flags); | |
3b661a92 | 1090 | } |
1da177e4 | 1091 | } |
3b661a92 | 1092 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 | 1093 | |
bc3f02a7 DW |
1094 | if (last) |
1095 | scsi_target_reap(last); | |
1da177e4 LT |
1096 | } |
1097 | EXPORT_SYMBOL(scsi_remove_target); | |
1098 | ||
1099 | int scsi_register_driver(struct device_driver *drv) | |
1100 | { | |
1101 | drv->bus = &scsi_bus_type; | |
1102 | ||
1103 | return driver_register(drv); | |
1104 | } | |
1105 | EXPORT_SYMBOL(scsi_register_driver); | |
1106 | ||
1107 | int scsi_register_interface(struct class_interface *intf) | |
1108 | { | |
1109 | intf->class = &sdev_class; | |
1110 | ||
1111 | return class_interface_register(intf); | |
1112 | } | |
1113 | EXPORT_SYMBOL(scsi_register_interface); | |
1114 | ||
1da177e4 LT |
1115 | /** |
1116 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1117 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1118 | **/ |
1119 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1120 | { | |
1121 | int error, i; | |
1122 | ||
f7120a4f | 1123 | /* add host specific attributes */ |
1da177e4 LT |
1124 | if (shost->hostt->shost_attrs) { |
1125 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1126 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1127 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1128 | if (error) |
1129 | return error; | |
1130 | } | |
1131 | } | |
1132 | ||
1133 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1134 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1135 | return 0; |
1136 | } | |
1137 | ||
bfd12944 KS |
1138 | static struct device_type scsi_dev_type = { |
1139 | .name = "scsi_device", | |
1140 | .release = scsi_device_dev_release, | |
1141 | .groups = scsi_sdev_attr_groups, | |
1142 | }; | |
1143 | ||
1da177e4 LT |
1144 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1145 | { | |
1146 | unsigned long flags; | |
1147 | struct Scsi_Host *shost = sdev->host; | |
1148 | struct scsi_target *starget = sdev->sdev_target; | |
1149 | ||
1150 | device_initialize(&sdev->sdev_gendev); | |
1151 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1152 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1153 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1154 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1155 | ||
ee959b00 | 1156 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1157 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1158 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1159 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1160 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1161 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1162 | transport_setup_device(&sdev->sdev_gendev); |
1163 | spin_lock_irqsave(shost->host_lock, flags); | |
1164 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1165 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1166 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1167 | } | |
1168 | ||
1169 | int scsi_is_sdev_device(const struct device *dev) | |
1170 | { | |
13ba9bcb | 1171 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1172 | } |
1173 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1174 | ||
1175 | /* A blank transport template that is used in drivers that don't | |
1176 | * yet implement Transport Attributes */ | |
1177 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |