Commit | Line | Data |
---|---|---|
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> | |
41f95dd2 | 20 | #include <scsi/scsi_dh.h> |
1da177e4 | 21 | #include <scsi/scsi_transport.h> |
44818efb | 22 | #include <scsi/scsi_driver.h> |
345e2960 | 23 | #include <scsi/scsi_devinfo.h> |
1da177e4 LT |
24 | |
25 | #include "scsi_priv.h" | |
26 | #include "scsi_logging.h" | |
27 | ||
b0ed4336 HR |
28 | static struct device_type scsi_dev_type; |
29 | ||
0ad78200 | 30 | static const struct { |
1da177e4 LT |
31 | enum scsi_device_state value; |
32 | char *name; | |
33 | } sdev_states[] = { | |
34 | { SDEV_CREATED, "created" }, | |
35 | { SDEV_RUNNING, "running" }, | |
36 | { SDEV_CANCEL, "cancel" }, | |
37 | { SDEV_DEL, "deleted" }, | |
38 | { SDEV_QUIESCE, "quiesce" }, | |
39 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 40 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 41 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 42 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
43 | }; |
44 | ||
45 | const char *scsi_device_state_name(enum scsi_device_state state) | |
46 | { | |
47 | int i; | |
48 | char *name = NULL; | |
49 | ||
6391a113 | 50 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
51 | if (sdev_states[i].value == state) { |
52 | name = sdev_states[i].name; | |
53 | break; | |
54 | } | |
55 | } | |
56 | return name; | |
57 | } | |
58 | ||
0ad78200 | 59 | static const struct { |
d3301874 MA |
60 | enum scsi_host_state value; |
61 | char *name; | |
62 | } shost_states[] = { | |
63 | { SHOST_CREATED, "created" }, | |
64 | { SHOST_RUNNING, "running" }, | |
65 | { SHOST_CANCEL, "cancel" }, | |
66 | { SHOST_DEL, "deleted" }, | |
67 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
68 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
69 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
70 | }; |
71 | const char *scsi_host_state_name(enum scsi_host_state state) | |
72 | { | |
73 | int i; | |
74 | char *name = NULL; | |
75 | ||
6391a113 | 76 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
77 | if (shost_states[i].value == state) { |
78 | name = shost_states[i].name; | |
79 | break; | |
80 | } | |
81 | } | |
82 | return name; | |
83 | } | |
84 | ||
d78540da | 85 | #ifdef CONFIG_SCSI_DH |
77c9df96 HR |
86 | static const struct { |
87 | unsigned char value; | |
88 | char *name; | |
89 | } sdev_access_states[] = { | |
90 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, | |
91 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, | |
92 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, | |
93 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, | |
94 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, | |
95 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, | |
96 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, | |
97 | }; | |
98 | ||
d78540da | 99 | static const char *scsi_access_state_name(unsigned char state) |
77c9df96 HR |
100 | { |
101 | int i; | |
102 | char *name = NULL; | |
103 | ||
104 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { | |
105 | if (sdev_access_states[i].value == state) { | |
106 | name = sdev_access_states[i].name; | |
107 | break; | |
108 | } | |
109 | } | |
110 | return name; | |
111 | } | |
d78540da | 112 | #endif |
77c9df96 | 113 | |
9cb78c16 | 114 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
115 | { |
116 | char *last; | |
117 | ||
3991e460 | 118 | if (strcmp(src, "-") == 0) { |
1da177e4 LT |
119 | *val = SCAN_WILD_CARD; |
120 | } else { | |
121 | /* | |
122 | * Doesn't check for int overflow | |
123 | */ | |
9cb78c16 | 124 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
125 | if (*last != '\0') |
126 | return 1; | |
127 | } | |
128 | return 0; | |
129 | } | |
130 | ||
131 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
132 | { | |
9cb78c16 HR |
133 | char s1[15], s2[15], s3[17], junk; |
134 | unsigned long long channel, id, lun; | |
1da177e4 LT |
135 | int res; |
136 | ||
9cb78c16 | 137 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
138 | if (res != 3) |
139 | return -EINVAL; | |
140 | if (check_set(&channel, s1)) | |
141 | return -EINVAL; | |
142 | if (check_set(&id, s2)) | |
143 | return -EINVAL; | |
144 | if (check_set(&lun, s3)) | |
145 | return -EINVAL; | |
e02f3f59 CH |
146 | if (shost->transportt->user_scan) |
147 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
148 | else | |
1d645088 HR |
149 | res = scsi_scan_host_selected(shost, channel, id, lun, |
150 | SCSI_SCAN_MANUAL); | |
1da177e4 LT |
151 | return res; |
152 | } | |
153 | ||
154 | /* | |
155 | * shost_show_function: macro to create an attr function that can be used to | |
156 | * show a non-bit field. | |
157 | */ | |
158 | #define shost_show_function(name, field, format_string) \ | |
159 | static ssize_t \ | |
ee959b00 TJ |
160 | show_##name (struct device *dev, struct device_attribute *attr, \ |
161 | char *buf) \ | |
1da177e4 | 162 | { \ |
ee959b00 | 163 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
164 | return snprintf (buf, 20, format_string, shost->field); \ |
165 | } | |
166 | ||
167 | /* | |
168 | * shost_rd_attr: macro to create a function and attribute variable for a | |
169 | * read only field. | |
170 | */ | |
171 | #define shost_rd_attr2(name, field, format_string) \ | |
172 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 173 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
174 | |
175 | #define shost_rd_attr(field, format_string) \ | |
176 | shost_rd_attr2(field, field, format_string) | |
177 | ||
178 | /* | |
179 | * Create the actual show/store functions and data structures. | |
180 | */ | |
181 | ||
ee959b00 TJ |
182 | static ssize_t |
183 | store_scan(struct device *dev, struct device_attribute *attr, | |
184 | const char *buf, size_t count) | |
1da177e4 | 185 | { |
ee959b00 | 186 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
187 | int res; |
188 | ||
189 | res = scsi_scan(shost, buf); | |
190 | if (res == 0) | |
191 | res = count; | |
192 | return res; | |
193 | }; | |
ee959b00 | 194 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 195 | |
d3301874 | 196 | static ssize_t |
ee959b00 TJ |
197 | store_shost_state(struct device *dev, struct device_attribute *attr, |
198 | const char *buf, size_t count) | |
d3301874 MA |
199 | { |
200 | int i; | |
ee959b00 | 201 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
202 | enum scsi_host_state state = 0; |
203 | ||
6391a113 | 204 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
205 | const int len = strlen(shost_states[i].name); |
206 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
207 | buf[len] == '\n') { | |
208 | state = shost_states[i].value; | |
209 | break; | |
210 | } | |
211 | } | |
212 | if (!state) | |
213 | return -EINVAL; | |
214 | ||
215 | if (scsi_host_set_state(shost, state)) | |
216 | return -EINVAL; | |
217 | return count; | |
218 | } | |
219 | ||
220 | static ssize_t | |
ee959b00 | 221 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 222 | { |
ee959b00 | 223 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
224 | const char *name = scsi_host_state_name(shost->shost_state); |
225 | ||
226 | if (!name) | |
227 | return -EINVAL; | |
228 | ||
229 | return snprintf(buf, 20, "%s\n", name); | |
230 | } | |
231 | ||
ee959b00 | 232 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
d78540da | 233 | static struct device_attribute dev_attr_hstate = |
ee959b00 | 234 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
d3301874 | 235 | |
5dc2b89e FT |
236 | static ssize_t |
237 | show_shost_mode(unsigned int mode, char *buf) | |
238 | { | |
239 | ssize_t len = 0; | |
240 | ||
241 | if (mode & MODE_INITIATOR) | |
242 | len = sprintf(buf, "%s", "Initiator"); | |
243 | ||
244 | if (mode & MODE_TARGET) | |
245 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
246 | ||
247 | len += sprintf(buf + len, "\n"); | |
248 | ||
249 | return len; | |
250 | } | |
251 | ||
ee959b00 TJ |
252 | static ssize_t |
253 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
254 | char *buf) | |
5dc2b89e | 255 | { |
ee959b00 | 256 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 257 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 258 | |
7a39ac3f JB |
259 | if (supported_mode == MODE_UNKNOWN) |
260 | /* by default this should be initiator */ | |
261 | supported_mode = MODE_INITIATOR; | |
262 | ||
263 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
264 | } |
265 | ||
ee959b00 | 266 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 267 | |
ee959b00 TJ |
268 | static ssize_t |
269 | show_shost_active_mode(struct device *dev, | |
270 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 271 | { |
ee959b00 | 272 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
273 | |
274 | if (shost->active_mode == MODE_UNKNOWN) | |
275 | return snprintf(buf, 20, "unknown\n"); | |
276 | else | |
277 | return show_shost_mode(shost->active_mode, buf); | |
278 | } | |
279 | ||
ee959b00 | 280 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 281 | |
072f19b4 | 282 | static int check_reset_type(const char *str) |
29443691 | 283 | { |
072f19b4 | 284 | if (sysfs_streq(str, "adapter")) |
29443691 | 285 | return SCSI_ADAPTER_RESET; |
072f19b4 | 286 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
287 | return SCSI_FIRMWARE_RESET; |
288 | else | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static ssize_t | |
293 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
294 | const char *buf, size_t count) | |
295 | { | |
296 | struct Scsi_Host *shost = class_to_shost(dev); | |
297 | struct scsi_host_template *sht = shost->hostt; | |
298 | int ret = -EINVAL; | |
29443691 VC |
299 | int type; |
300 | ||
072f19b4 | 301 | type = check_reset_type(buf); |
29443691 VC |
302 | if (!type) |
303 | goto exit_store_host_reset; | |
304 | ||
305 | if (sht->host_reset) | |
306 | ret = sht->host_reset(shost, type); | |
92227b8d | 307 | else |
308 | ret = -EOPNOTSUPP; | |
29443691 VC |
309 | |
310 | exit_store_host_reset: | |
311 | if (ret == 0) | |
312 | ret = count; | |
313 | return ret; | |
314 | } | |
315 | ||
316 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
317 | ||
b4562022 HR |
318 | static ssize_t |
319 | show_shost_eh_deadline(struct device *dev, | |
320 | struct device_attribute *attr, char *buf) | |
321 | { | |
322 | struct Scsi_Host *shost = class_to_shost(dev); | |
323 | ||
bb3b621a RM |
324 | if (shost->eh_deadline == -1) |
325 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
326 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
327 | } |
328 | ||
329 | static ssize_t | |
330 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
331 | const char *buf, size_t count) | |
332 | { | |
333 | struct Scsi_Host *shost = class_to_shost(dev); | |
334 | int ret = -EINVAL; | |
bb3b621a | 335 | unsigned long deadline, flags; |
b4562022 | 336 | |
ad469a57 HR |
337 | if (shost->transportt && |
338 | (shost->transportt->eh_strategy_handler || | |
339 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
340 | return ret; |
341 | ||
bb3b621a RM |
342 | if (!strncmp(buf, "off", strlen("off"))) |
343 | deadline = -1; | |
344 | else { | |
345 | ret = kstrtoul(buf, 10, &deadline); | |
346 | if (ret) | |
347 | return ret; | |
348 | if (deadline * HZ > UINT_MAX) | |
349 | return -EINVAL; | |
350 | } | |
351 | ||
352 | spin_lock_irqsave(shost->host_lock, flags); | |
353 | if (scsi_host_in_recovery(shost)) | |
354 | ret = -EBUSY; | |
355 | else { | |
356 | if (deadline == -1) | |
357 | shost->eh_deadline = -1; | |
358 | else | |
b4562022 | 359 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
360 | |
361 | ret = count; | |
b4562022 | 362 | } |
bb3b621a RM |
363 | spin_unlock_irqrestore(shost->host_lock, flags); |
364 | ||
b4562022 HR |
365 | return ret; |
366 | } | |
367 | ||
368 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
369 | ||
d285203c | 370 | shost_rd_attr(use_blk_mq, "%d\n"); |
1da177e4 | 371 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 372 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 373 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 374 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 375 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 376 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
377 | shost_rd_attr(prot_capabilities, "%u\n"); |
378 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
379 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
380 | ||
74665016 CH |
381 | static ssize_t |
382 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
383 | { | |
384 | struct Scsi_Host *shost = class_to_shost(dev); | |
385 | return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy)); | |
386 | } | |
387 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
388 | ||
f7120a4f | 389 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 390 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
391 | &dev_attr_unique_id.attr, |
392 | &dev_attr_host_busy.attr, | |
393 | &dev_attr_cmd_per_lun.attr, | |
394 | &dev_attr_can_queue.attr, | |
395 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 396 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
397 | &dev_attr_unchecked_isa_dma.attr, |
398 | &dev_attr_proc_name.attr, | |
399 | &dev_attr_scan.attr, | |
400 | &dev_attr_hstate.attr, | |
401 | &dev_attr_supported_mode.attr, | |
402 | &dev_attr_active_mode.attr, | |
4469f987 MP |
403 | &dev_attr_prot_capabilities.attr, |
404 | &dev_attr_prot_guard_type.attr, | |
29443691 | 405 | &dev_attr_host_reset.attr, |
b4562022 | 406 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
407 | NULL |
408 | }; | |
409 | ||
d78540da | 410 | static struct attribute_group scsi_shost_attr_group = { |
f7120a4f HR |
411 | .attrs = scsi_sysfs_shost_attrs, |
412 | }; | |
413 | ||
a4dbd674 | 414 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 415 | &scsi_shost_attr_group, |
1da177e4 LT |
416 | NULL |
417 | }; | |
418 | ||
ee959b00 | 419 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
420 | { |
421 | struct scsi_device *sdev; | |
422 | ||
423 | sdev = class_to_sdev(class_dev); | |
424 | put_device(&sdev->sdev_gendev); | |
425 | } | |
426 | ||
65f27f38 | 427 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
428 | { |
429 | struct scsi_device *sdev; | |
430 | struct device *parent; | |
a341cd0f | 431 | struct list_head *this, *tmp; |
ccf1e004 | 432 | struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
1da177e4 LT |
433 | unsigned long flags; |
434 | ||
65f27f38 DH |
435 | sdev = container_of(work, struct scsi_device, ew.work); |
436 | ||
23695e41 JN |
437 | scsi_dh_release_device(sdev); |
438 | ||
65f27f38 | 439 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
440 | |
441 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
442 | list_del(&sdev->siblings); |
443 | list_del(&sdev->same_target_siblings); | |
444 | list_del(&sdev->starved_entry); | |
445 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
446 | ||
a341cd0f JG |
447 | cancel_work_sync(&sdev->event_work); |
448 | ||
449 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
450 | struct scsi_event *evt; | |
451 | ||
452 | evt = list_entry(this, struct scsi_event, node); | |
453 | list_del(&evt->node); | |
454 | kfree(evt); | |
455 | } | |
456 | ||
e73e079b | 457 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
458 | /* NULL queue means the device can't be used */ |
459 | sdev->request_queue = NULL; | |
1da177e4 | 460 | |
ccf1e004 BVA |
461 | mutex_lock(&sdev->inquiry_mutex); |
462 | rcu_swap_protected(sdev->vpd_pg80, vpd_pg80, | |
463 | lockdep_is_held(&sdev->inquiry_mutex)); | |
464 | rcu_swap_protected(sdev->vpd_pg83, vpd_pg83, | |
465 | lockdep_is_held(&sdev->inquiry_mutex)); | |
466 | mutex_unlock(&sdev->inquiry_mutex); | |
467 | ||
468 | if (vpd_pg83) | |
469 | kfree_rcu(vpd_pg83, rcu); | |
470 | if (vpd_pg80) | |
471 | kfree_rcu(vpd_pg80, rcu); | |
1da177e4 LT |
472 | kfree(sdev->inquiry); |
473 | kfree(sdev); | |
474 | ||
475 | if (parent) | |
476 | put_device(parent); | |
477 | } | |
478 | ||
65110b21 JB |
479 | static void scsi_device_dev_release(struct device *dev) |
480 | { | |
ffedb452 | 481 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 482 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 483 | &sdp->ew); |
65110b21 JB |
484 | } |
485 | ||
52c1da39 | 486 | static struct class sdev_class = { |
1da177e4 | 487 | .name = "scsi_device", |
ee959b00 | 488 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
489 | }; |
490 | ||
491 | /* all probing is done in the individual ->probe routines */ | |
492 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
493 | { | |
b0ed4336 HR |
494 | struct scsi_device *sdp; |
495 | ||
496 | if (dev->type != &scsi_dev_type) | |
497 | return 0; | |
498 | ||
499 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
500 | if (sdp->no_uld_attach) |
501 | return 0; | |
502 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
503 | } | |
504 | ||
7eff2e7a | 505 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 506 | { |
1f42ea7b JB |
507 | struct scsi_device *sdev; |
508 | ||
509 | if (dev->type != &scsi_dev_type) | |
510 | return 0; | |
511 | ||
512 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 513 | |
7eff2e7a | 514 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
515 | return 0; |
516 | } | |
517 | ||
1da177e4 LT |
518 | struct bus_type scsi_bus_type = { |
519 | .name = "scsi", | |
520 | .match = scsi_bus_match, | |
d7b8bcb0 | 521 | .uevent = scsi_bus_uevent, |
aa338601 | 522 | #ifdef CONFIG_PM |
db5bd1e0 | 523 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 524 | #endif |
1da177e4 | 525 | }; |
a6a8d9f8 | 526 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
527 | |
528 | int scsi_sysfs_register(void) | |
529 | { | |
530 | int error; | |
531 | ||
532 | error = bus_register(&scsi_bus_type); | |
533 | if (!error) { | |
534 | error = class_register(&sdev_class); | |
535 | if (error) | |
536 | bus_unregister(&scsi_bus_type); | |
537 | } | |
538 | ||
539 | return error; | |
540 | } | |
541 | ||
542 | void scsi_sysfs_unregister(void) | |
543 | { | |
544 | class_unregister(&sdev_class); | |
545 | bus_unregister(&scsi_bus_type); | |
546 | } | |
547 | ||
548 | /* | |
549 | * sdev_show_function: macro to create an attr function that can be used to | |
550 | * show a non-bit field. | |
551 | */ | |
552 | #define sdev_show_function(field, format_string) \ | |
553 | static ssize_t \ | |
ee959b00 TJ |
554 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
555 | char *buf) \ | |
1da177e4 LT |
556 | { \ |
557 | struct scsi_device *sdev; \ | |
558 | sdev = to_scsi_device(dev); \ | |
559 | return snprintf (buf, 20, format_string, sdev->field); \ | |
560 | } \ | |
561 | ||
562 | /* | |
563 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
564 | * read only field. | |
565 | */ | |
566 | #define sdev_rd_attr(field, format_string) \ | |
567 | sdev_show_function(field, format_string) \ | |
568 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
569 | ||
570 | ||
571 | /* | |
160e7f67 | 572 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
573 | * read/write field. |
574 | */ | |
575 | #define sdev_rw_attr(field, format_string) \ | |
576 | sdev_show_function(field, format_string) \ | |
577 | \ | |
578 | static ssize_t \ | |
ee959b00 TJ |
579 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
580 | const char *buf, size_t count) \ | |
1da177e4 LT |
581 | { \ |
582 | struct scsi_device *sdev; \ | |
583 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 584 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
585 | return count; \ |
586 | } \ | |
587 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
588 | ||
589 | /* Currently we don't export bit fields, but we might in future, | |
590 | * so leave this code in */ | |
591 | #if 0 | |
592 | /* | |
593 | * sdev_rd_attr: create a function and attribute variable for a | |
594 | * read/write bit field. | |
595 | */ | |
596 | #define sdev_rw_attr_bit(field) \ | |
597 | sdev_show_function(field, "%d\n") \ | |
598 | \ | |
599 | static ssize_t \ | |
ee959b00 TJ |
600 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
601 | const char *buf, size_t count) \ | |
1da177e4 LT |
602 | { \ |
603 | int ret; \ | |
604 | struct scsi_device *sdev; \ | |
605 | ret = scsi_sdev_check_buf_bit(buf); \ | |
606 | if (ret >= 0) { \ | |
607 | sdev = to_scsi_device(dev); \ | |
608 | sdev->field = ret; \ | |
609 | ret = count; \ | |
610 | } \ | |
611 | return ret; \ | |
612 | } \ | |
613 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
614 | ||
615 | /* | |
616 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
617 | * else return -EINVAL. | |
618 | */ | |
619 | static int scsi_sdev_check_buf_bit(const char *buf) | |
620 | { | |
621 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
622 | if (buf[0] == '1') | |
623 | return 1; | |
624 | else if (buf[0] == '0') | |
625 | return 0; | |
626 | else | |
627 | return -EINVAL; | |
628 | } else | |
629 | return -EINVAL; | |
630 | } | |
631 | #endif | |
632 | /* | |
633 | * Create the actual show/store functions and data structures. | |
634 | */ | |
1da177e4 LT |
635 | sdev_rd_attr (type, "%d\n"); |
636 | sdev_rd_attr (scsi_level, "%d\n"); | |
637 | sdev_rd_attr (vendor, "%.8s\n"); | |
638 | sdev_rd_attr (model, "%.16s\n"); | |
639 | sdev_rd_attr (rev, "%.4s\n"); | |
640 | ||
71e75c97 CH |
641 | static ssize_t |
642 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
643 | char *buf) | |
644 | { | |
645 | struct scsi_device *sdev = to_scsi_device(dev); | |
646 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
647 | } | |
648 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
649 | ||
cd9070c9 CH |
650 | static ssize_t |
651 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
652 | char *buf) | |
653 | { | |
654 | struct scsi_device *sdev = to_scsi_device(dev); | |
655 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
656 | } | |
657 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
658 | ||
242f9dcb JA |
659 | /* |
660 | * TODO: can we make these symlinks to the block layer ones? | |
661 | */ | |
1da177e4 | 662 | static ssize_t |
10523b3b | 663 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
664 | { |
665 | struct scsi_device *sdev; | |
666 | sdev = to_scsi_device(dev); | |
242f9dcb | 667 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
668 | } |
669 | ||
670 | static ssize_t | |
ee959b00 TJ |
671 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
672 | const char *buf, size_t count) | |
1da177e4 LT |
673 | { |
674 | struct scsi_device *sdev; | |
675 | int timeout; | |
676 | sdev = to_scsi_device(dev); | |
677 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 678 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
679 | return count; |
680 | } | |
681 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
682 | ||
0816c925 MP |
683 | static ssize_t |
684 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
685 | { | |
686 | struct scsi_device *sdev; | |
687 | sdev = to_scsi_device(dev); | |
688 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
689 | } | |
690 | ||
691 | static ssize_t | |
692 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
693 | const char *buf, size_t count) | |
694 | { | |
695 | struct scsi_device *sdev; | |
696 | unsigned int eh_timeout; | |
697 | int err; | |
698 | ||
699 | if (!capable(CAP_SYS_ADMIN)) | |
700 | return -EACCES; | |
701 | ||
702 | sdev = to_scsi_device(dev); | |
703 | err = kstrtouint(buf, 10, &eh_timeout); | |
704 | if (err) | |
705 | return err; | |
706 | sdev->eh_timeout = eh_timeout * HZ; | |
707 | ||
708 | return count; | |
709 | } | |
710 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
711 | ||
1da177e4 | 712 | static ssize_t |
ee959b00 TJ |
713 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
714 | const char *buf, size_t count) | |
1da177e4 LT |
715 | { |
716 | scsi_rescan_device(dev); | |
717 | return count; | |
718 | } | |
719 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
720 | ||
ee959b00 TJ |
721 | static ssize_t |
722 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
723 | const char *buf, size_t count) | |
1da177e4 | 724 | { |
ac0ece91 TH |
725 | if (device_remove_file_self(dev, attr)) |
726 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
727 | return count; |
728 | }; | |
729 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
730 | ||
731 | static ssize_t | |
ee959b00 TJ |
732 | store_state_field(struct device *dev, struct device_attribute *attr, |
733 | const char *buf, size_t count) | |
1da177e4 | 734 | { |
0db6ca8a | 735 | int i, ret; |
1da177e4 LT |
736 | struct scsi_device *sdev = to_scsi_device(dev); |
737 | enum scsi_device_state state = 0; | |
738 | ||
6391a113 | 739 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
740 | const int len = strlen(sdev_states[i].name); |
741 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
742 | buf[len] == '\n') { | |
743 | state = sdev_states[i].value; | |
744 | break; | |
745 | } | |
746 | } | |
747 | if (!state) | |
748 | return -EINVAL; | |
749 | ||
0db6ca8a BVA |
750 | mutex_lock(&sdev->state_mutex); |
751 | ret = scsi_device_set_state(sdev, state); | |
752 | mutex_unlock(&sdev->state_mutex); | |
753 | ||
754 | return ret == 0 ? count : -EINVAL; | |
1da177e4 LT |
755 | } |
756 | ||
757 | static ssize_t | |
10523b3b | 758 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
759 | { |
760 | struct scsi_device *sdev = to_scsi_device(dev); | |
761 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
762 | ||
763 | if (!name) | |
764 | return -EINVAL; | |
765 | ||
766 | return snprintf(buf, 20, "%s\n", name); | |
767 | } | |
768 | ||
769 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
770 | ||
771 | static ssize_t | |
ee959b00 TJ |
772 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
773 | char *buf) | |
1da177e4 LT |
774 | { |
775 | struct scsi_device *sdev = to_scsi_device(dev); | |
776 | const char *name = "none"; | |
777 | ||
609aa22f | 778 | if (sdev->simple_tags) |
1da177e4 LT |
779 | name = "simple"; |
780 | ||
781 | return snprintf(buf, 20, "%s\n", name); | |
782 | } | |
783 | ||
276b20d0 HR |
784 | static ssize_t |
785 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
786 | const char *buf, size_t count) | |
787 | { | |
788 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 789 | |
efc3c1df | 790 | if (!sdev->tagged_supported) |
276b20d0 | 791 | return -EINVAL; |
efc3c1df CH |
792 | |
793 | sdev_printk(KERN_INFO, sdev, | |
794 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
795 | return count; |
796 | } | |
797 | ||
798 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
799 | store_queue_type_field); | |
1da177e4 | 800 | |
b3ae8780 HR |
801 | #define sdev_vpd_pg_attr(_page) \ |
802 | static ssize_t \ | |
803 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
804 | struct bin_attribute *bin_attr, \ | |
805 | char *buf, loff_t off, size_t count) \ | |
806 | { \ | |
807 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
808 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
ccf1e004 BVA |
809 | struct scsi_vpd *vpd_page; \ |
810 | int ret = -EINVAL; \ | |
811 | \ | |
09e2b0b1 | 812 | rcu_read_lock(); \ |
ccf1e004 BVA |
813 | vpd_page = rcu_dereference(sdev->vpd_##_page); \ |
814 | if (vpd_page) \ | |
815 | ret = memory_read_from_buffer(buf, count, &off, \ | |
816 | vpd_page->data, vpd_page->len); \ | |
09e2b0b1 | 817 | rcu_read_unlock(); \ |
ccf1e004 | 818 | return ret; \ |
b3ae8780 HR |
819 | } \ |
820 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
821 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
822 | .size = 0, \ | |
823 | .read = show_vpd_##_page, \ | |
824 | }; | |
825 | ||
826 | sdev_vpd_pg_attr(pg83); | |
827 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 828 | |
92e6246c JT |
829 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
830 | struct bin_attribute *bin_attr, | |
831 | char *buf, loff_t off, size_t count) | |
832 | { | |
833 | struct device *dev = container_of(kobj, struct device, kobj); | |
834 | struct scsi_device *sdev = to_scsi_device(dev); | |
835 | ||
836 | if (!sdev->inquiry) | |
837 | return -EINVAL; | |
838 | ||
839 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
840 | sdev->inquiry_len); | |
841 | } | |
842 | ||
843 | static struct bin_attribute dev_attr_inquiry = { | |
844 | .attr = { | |
845 | .name = "inquiry", | |
846 | .mode = S_IRUGO, | |
847 | }, | |
848 | .size = 0, | |
849 | .read = show_inquiry, | |
850 | }; | |
851 | ||
1da177e4 | 852 | static ssize_t |
b3ae8780 HR |
853 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
854 | char *buf) | |
1da177e4 LT |
855 | { |
856 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
857 | } | |
858 | ||
859 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
860 | ||
861 | #define show_sdev_iostat(field) \ | |
862 | static ssize_t \ | |
ee959b00 TJ |
863 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
864 | char *buf) \ | |
1da177e4 LT |
865 | { \ |
866 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
867 | unsigned long long count = atomic_read(&sdev->field); \ | |
868 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
869 | } \ | |
870 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
871 | ||
872 | show_sdev_iostat(iorequest_cnt); | |
873 | show_sdev_iostat(iodone_cnt); | |
874 | show_sdev_iostat(ioerr_cnt); | |
875 | ||
d7b8bcb0 MT |
876 | static ssize_t |
877 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
878 | { | |
879 | struct scsi_device *sdev; | |
880 | sdev = to_scsi_device(dev); | |
881 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
882 | } | |
883 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 884 | |
a341cd0f JG |
885 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
886 | static ssize_t \ | |
887 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 888 | char *buf) \ |
a341cd0f JG |
889 | { \ |
890 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
891 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
892 | return snprintf(buf, 20, "%d\n", val); \ | |
893 | } | |
894 | ||
895 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
896 | static ssize_t \ | |
ee959b00 | 897 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
898 | const char *buf, size_t count) \ |
899 | { \ | |
900 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
901 | int val = simple_strtoul(buf, NULL, 0); \ | |
902 | if (val == 0) \ | |
903 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
904 | else if (val == 1) \ | |
905 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
906 | else \ | |
907 | return -EINVAL; \ | |
908 | return count; \ | |
909 | } | |
910 | ||
911 | #define DECLARE_EVT(name, Cap_name) \ | |
912 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
913 | DECLARE_EVT_STORE(name, Cap_name) \ | |
914 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
915 | sdev_store_evt_##name); | |
916 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
917 | ||
918 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
919 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
920 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
921 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
922 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
923 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 924 | |
ee959b00 | 925 | static ssize_t |
276b20d0 HR |
926 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
927 | const char *buf, size_t count) | |
1da177e4 LT |
928 | { |
929 | int depth, retval; | |
930 | struct scsi_device *sdev = to_scsi_device(dev); | |
931 | struct scsi_host_template *sht = sdev->host->hostt; | |
932 | ||
933 | if (!sht->change_queue_depth) | |
934 | return -EINVAL; | |
935 | ||
936 | depth = simple_strtoul(buf, NULL, 0); | |
937 | ||
1278dd68 | 938 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
939 | return -EINVAL; |
940 | ||
db5ed4df | 941 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
942 | if (retval < 0) |
943 | return retval; | |
944 | ||
4a84067d VD |
945 | sdev->max_queue_depth = sdev->queue_depth; |
946 | ||
1da177e4 LT |
947 | return count; |
948 | } | |
276b20d0 | 949 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 950 | |
276b20d0 HR |
951 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
952 | sdev_store_queue_depth); | |
1da177e4 | 953 | |
248d4fe9 HR |
954 | static ssize_t |
955 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
956 | char *buf) | |
957 | { | |
958 | struct scsi_device *sdev = to_scsi_device(dev); | |
959 | ssize_t count; | |
960 | ||
961 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
962 | if (count > 0) { | |
963 | buf[count] = '\n'; | |
964 | count++; | |
965 | } | |
966 | return count; | |
967 | } | |
968 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
969 | ||
093b8886 BVA |
970 | #define BLIST_FLAG_NAME(name) \ |
971 | [ilog2((__force unsigned int)BLIST_##name)] = #name | |
345e2960 HR |
972 | static const char *const sdev_bflags_name[] = { |
973 | #include "scsi_devinfo_tbl.c" | |
974 | }; | |
975 | #undef BLIST_FLAG_NAME | |
976 | ||
977 | static ssize_t | |
978 | sdev_show_blacklist(struct device *dev, struct device_attribute *attr, | |
979 | char *buf) | |
980 | { | |
981 | struct scsi_device *sdev = to_scsi_device(dev); | |
982 | int i; | |
983 | ssize_t len = 0; | |
984 | ||
985 | for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { | |
986 | const char *name = NULL; | |
987 | ||
093b8886 | 988 | if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) |
345e2960 HR |
989 | continue; |
990 | if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) | |
991 | name = sdev_bflags_name[i]; | |
992 | ||
993 | if (name) | |
994 | len += snprintf(buf + len, PAGE_SIZE - len, | |
995 | "%s%s", len ? " " : "", name); | |
996 | else | |
997 | len += snprintf(buf + len, PAGE_SIZE - len, | |
998 | "%sINVALID_BIT(%d)", len ? " " : "", i); | |
999 | } | |
1000 | if (len) | |
1001 | len += snprintf(buf + len, PAGE_SIZE - len, "\n"); | |
1002 | return len; | |
1003 | } | |
1004 | static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); | |
1005 | ||
41f95dd2 HR |
1006 | #ifdef CONFIG_SCSI_DH |
1007 | static ssize_t | |
1008 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
1009 | char *buf) | |
1010 | { | |
1011 | struct scsi_device *sdev = to_scsi_device(dev); | |
1012 | ||
1013 | if (!sdev->handler) | |
1014 | return snprintf(buf, 20, "detached\n"); | |
1015 | ||
1016 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
1017 | } | |
1018 | ||
1019 | static ssize_t | |
1020 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
1021 | const char *buf, size_t count) | |
1022 | { | |
1023 | struct scsi_device *sdev = to_scsi_device(dev); | |
1024 | int err = -EINVAL; | |
1025 | ||
1026 | if (sdev->sdev_state == SDEV_CANCEL || | |
1027 | sdev->sdev_state == SDEV_DEL) | |
1028 | return -ENODEV; | |
1029 | ||
1030 | if (!sdev->handler) { | |
1031 | /* | |
1032 | * Attach to a device handler | |
1033 | */ | |
1034 | err = scsi_dh_attach(sdev->request_queue, buf); | |
1035 | } else if (!strncmp(buf, "activate", 8)) { | |
1036 | /* | |
1037 | * Activate a device handler | |
1038 | */ | |
1039 | if (sdev->handler->activate) | |
1040 | err = sdev->handler->activate(sdev, NULL, NULL); | |
1041 | else | |
1042 | err = 0; | |
1043 | } else if (!strncmp(buf, "detach", 6)) { | |
1044 | /* | |
1045 | * Detach from a device handler | |
1046 | */ | |
1047 | sdev_printk(KERN_WARNING, sdev, | |
1048 | "can't detach handler %s.\n", | |
1049 | sdev->handler->name); | |
1050 | err = -EINVAL; | |
1051 | } | |
1052 | ||
1053 | return err < 0 ? err : count; | |
1054 | } | |
1055 | ||
1056 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1057 | sdev_store_dh_state); | |
77c9df96 HR |
1058 | |
1059 | static ssize_t | |
1060 | sdev_show_access_state(struct device *dev, | |
1061 | struct device_attribute *attr, | |
1062 | char *buf) | |
1063 | { | |
1064 | struct scsi_device *sdev = to_scsi_device(dev); | |
1065 | unsigned char access_state; | |
1066 | const char *access_state_name; | |
1067 | ||
1068 | if (!sdev->handler) | |
1069 | return -EINVAL; | |
1070 | ||
1071 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1072 | access_state_name = scsi_access_state_name(access_state); | |
1073 | ||
1074 | return sprintf(buf, "%s\n", | |
1075 | access_state_name ? access_state_name : "unknown"); | |
1076 | } | |
1077 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1078 | ||
1079 | static ssize_t | |
1080 | sdev_show_preferred_path(struct device *dev, | |
1081 | struct device_attribute *attr, | |
1082 | char *buf) | |
1083 | { | |
1084 | struct scsi_device *sdev = to_scsi_device(dev); | |
1085 | ||
1086 | if (!sdev->handler) | |
1087 | return -EINVAL; | |
1088 | ||
1089 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1090 | return sprintf(buf, "1\n"); | |
1091 | else | |
1092 | return sprintf(buf, "0\n"); | |
1093 | } | |
1094 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1095 | #endif |
1096 | ||
4a84067d VD |
1097 | static ssize_t |
1098 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1099 | struct device_attribute *attr, | |
1100 | char *buf) | |
1101 | { | |
1102 | struct scsi_device *sdev; | |
1103 | sdev = to_scsi_device(dev); | |
1104 | return snprintf(buf, 20, "%u\n", | |
1105 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1106 | } | |
1107 | ||
1108 | static ssize_t | |
1109 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1110 | struct device_attribute *attr, | |
1111 | const char *buf, size_t count) | |
1112 | { | |
1113 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1114 | unsigned int period; |
4a84067d | 1115 | |
f7c65af5 | 1116 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1117 | return -EINVAL; |
1118 | ||
1119 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1120 | return count; |
4a84067d VD |
1121 | } |
1122 | ||
276b20d0 HR |
1123 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1124 | sdev_show_queue_ramp_up_period, | |
1125 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1126 | |
276b20d0 HR |
1127 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1128 | struct attribute *attr, int i) | |
1da177e4 | 1129 | { |
276b20d0 | 1130 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1131 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1132 | |
1da177e4 | 1133 | |
276b20d0 HR |
1134 | if (attr == &dev_attr_queue_depth.attr && |
1135 | !sdev->host->hostt->change_queue_depth) | |
1136 | return S_IRUGO; | |
1da177e4 | 1137 | |
276b20d0 HR |
1138 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1139 | !sdev->host->hostt->change_queue_depth) | |
1140 | return 0; | |
1da177e4 | 1141 | |
77c9df96 HR |
1142 | #ifdef CONFIG_SCSI_DH |
1143 | if (attr == &dev_attr_access_state.attr && | |
1144 | !sdev->handler) | |
1145 | return 0; | |
1146 | if (attr == &dev_attr_preferred_path.attr && | |
1147 | !sdev->handler) | |
1148 | return 0; | |
1149 | #endif | |
276b20d0 | 1150 | return attr->mode; |
1da177e4 LT |
1151 | } |
1152 | ||
7e47976b HR |
1153 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1154 | struct bin_attribute *attr, int i) | |
1155 | { | |
1156 | struct device *dev = container_of(kobj, struct device, kobj); | |
1157 | struct scsi_device *sdev = to_scsi_device(dev); | |
1158 | ||
1159 | ||
1160 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) | |
1161 | return 0; | |
1162 | ||
68887582 | 1163 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1164 | return 0; |
1165 | ||
1166 | return S_IRUGO; | |
1167 | } | |
1168 | ||
276b20d0 HR |
1169 | /* Default template for device attributes. May NOT be modified */ |
1170 | static struct attribute *scsi_sdev_attrs[] = { | |
1171 | &dev_attr_device_blocked.attr, | |
1172 | &dev_attr_type.attr, | |
1173 | &dev_attr_scsi_level.attr, | |
1174 | &dev_attr_device_busy.attr, | |
1175 | &dev_attr_vendor.attr, | |
1176 | &dev_attr_model.attr, | |
1177 | &dev_attr_rev.attr, | |
1178 | &dev_attr_rescan.attr, | |
1179 | &dev_attr_delete.attr, | |
1180 | &dev_attr_state.attr, | |
1181 | &dev_attr_timeout.attr, | |
1182 | &dev_attr_eh_timeout.attr, | |
1183 | &dev_attr_iocounterbits.attr, | |
1184 | &dev_attr_iorequest_cnt.attr, | |
1185 | &dev_attr_iodone_cnt.attr, | |
1186 | &dev_attr_ioerr_cnt.attr, | |
1187 | &dev_attr_modalias.attr, | |
1188 | &dev_attr_queue_depth.attr, | |
1189 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1190 | &dev_attr_wwid.attr, |
345e2960 | 1191 | &dev_attr_blacklist.attr, |
41f95dd2 HR |
1192 | #ifdef CONFIG_SCSI_DH |
1193 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1194 | &dev_attr_access_state.attr, |
1195 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1196 | #endif |
276b20d0 HR |
1197 | &dev_attr_queue_ramp_up_period.attr, |
1198 | REF_EVT(media_change), | |
1199 | REF_EVT(inquiry_change_reported), | |
1200 | REF_EVT(capacity_change_reported), | |
1201 | REF_EVT(soft_threshold_reached), | |
1202 | REF_EVT(mode_parameter_change_reported), | |
1203 | REF_EVT(lun_change_reported), | |
1204 | NULL | |
1205 | }; | |
1206 | ||
b3ae8780 HR |
1207 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1208 | &dev_attr_vpd_pg83, | |
1209 | &dev_attr_vpd_pg80, | |
92e6246c | 1210 | &dev_attr_inquiry, |
b3ae8780 HR |
1211 | NULL |
1212 | }; | |
276b20d0 HR |
1213 | static struct attribute_group scsi_sdev_attr_group = { |
1214 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1215 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1216 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1217 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1218 | }; |
1219 | ||
1220 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1221 | &scsi_sdev_attr_group, | |
1222 | NULL | |
1223 | }; | |
1224 | ||
643eb2d9 JB |
1225 | static int scsi_target_add(struct scsi_target *starget) |
1226 | { | |
1227 | int error; | |
1228 | ||
1229 | if (starget->state != STARGET_CREATED) | |
1230 | return 0; | |
1231 | ||
1232 | error = device_add(&starget->dev); | |
1233 | if (error) { | |
1234 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1235 | return error; |
1236 | } | |
1237 | transport_add_device(&starget->dev); | |
1238 | starget->state = STARGET_RUNNING; | |
1239 | ||
bc4f2401 AS |
1240 | pm_runtime_set_active(&starget->dev); |
1241 | pm_runtime_enable(&starget->dev); | |
1242 | device_enable_async_suspend(&starget->dev); | |
1243 | ||
643eb2d9 JB |
1244 | return 0; |
1245 | } | |
1246 | ||
1da177e4 LT |
1247 | /** |
1248 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1249 | * @sdev: scsi_device to add | |
1250 | * | |
1251 | * Return value: | |
1252 | * 0 on Success / non-zero on Failure | |
1253 | **/ | |
1254 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1255 | { | |
1256 | int error, i; | |
80ed71ce | 1257 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1258 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1259 | |
643eb2d9 JB |
1260 | error = scsi_target_add(starget); |
1261 | if (error) | |
1262 | return error; | |
1263 | ||
1264 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1265 | |
4cb077d9 | 1266 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1267 | scsi_autopm_get_target(starget); |
1268 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1269 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1270 | pm_runtime_enable(&sdev->sdev_gendev); | |
1271 | scsi_autopm_put_target(starget); | |
1272 | ||
bc4f2401 AS |
1273 | scsi_autopm_get_device(sdev); |
1274 | ||
2930f817 | 1275 | scsi_dh_add_device(sdev); |
086b91d0 | 1276 | |
4cd2459c HR |
1277 | error = device_add(&sdev->sdev_gendev); |
1278 | if (error) { | |
1279 | sdev_printk(KERN_INFO, sdev, | |
1280 | "failed to add device: %d\n", error); | |
4cd2459c HR |
1281 | return error; |
1282 | } | |
1283 | ||
4cb077d9 | 1284 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1285 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1286 | if (error) { |
73d8c34f AS |
1287 | sdev_printk(KERN_INFO, sdev, |
1288 | "failed to add class device: %d\n", error); | |
860dc736 | 1289 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1290 | return error; |
1da177e4 | 1291 | } |
860dc736 JB |
1292 | transport_add_device(&sdev->sdev_gendev); |
1293 | sdev->is_visible = 1; | |
1da177e4 | 1294 | |
17cb960f | 1295 | error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev); |
80ed71ce | 1296 | if (error) |
860dc736 JB |
1297 | /* we're treating error on bsg register as non-fatal, |
1298 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1299 | sdev_printk(KERN_INFO, sdev, |
1300 | "Failed to register bsg queue, errno=%d\n", error); | |
1301 | ||
bfd12944 | 1302 | /* add additional host specific attributes */ |
1da177e4 LT |
1303 | if (sdev->host->hostt->sdev_attrs) { |
1304 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1305 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1306 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1307 | if (error) |
ee37e09d | 1308 | return error; |
1da177e4 LT |
1309 | } |
1310 | } | |
1da177e4 | 1311 | |
86b87cde SN |
1312 | if (sdev->host->hostt->sdev_groups) { |
1313 | error = sysfs_create_groups(&sdev->sdev_gendev.kobj, | |
1314 | sdev->host->hostt->sdev_groups); | |
1315 | if (error) | |
1316 | return error; | |
1317 | } | |
1318 | ||
6fe8c1db | 1319 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1320 | return error; |
1321 | } | |
1322 | ||
903f4fed | 1323 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1324 | { |
df133c21 | 1325 | struct device *dev = &sdev->sdev_gendev; |
0db6ca8a | 1326 | int res; |
df133c21 | 1327 | |
be821fd8 VK |
1328 | /* |
1329 | * This cleanup path is not reentrant and while it is impossible | |
1330 | * to get a new reference with scsi_device_get() someone can still | |
1331 | * hold a previously acquired one. | |
1332 | */ | |
1333 | if (sdev->sdev_state == SDEV_DEL) | |
1334 | return; | |
1335 | ||
860dc736 | 1336 | if (sdev->is_visible) { |
0db6ca8a BVA |
1337 | /* |
1338 | * If scsi_internal_target_block() is running concurrently, | |
1339 | * wait until it has finished before changing the device state. | |
1340 | */ | |
1341 | mutex_lock(&sdev->state_mutex); | |
255ee932 BVA |
1342 | /* |
1343 | * If blocked, we go straight to DEL and restart the queue so | |
1344 | * any commands issued during driver shutdown (like sync | |
1345 | * cache) are errored immediately. | |
1346 | */ | |
0db6ca8a | 1347 | res = scsi_device_set_state(sdev, SDEV_CANCEL); |
255ee932 BVA |
1348 | if (res != 0) { |
1349 | res = scsi_device_set_state(sdev, SDEV_DEL); | |
1350 | if (res == 0) | |
1351 | scsi_start_queue(sdev); | |
1352 | } | |
0db6ca8a BVA |
1353 | mutex_unlock(&sdev->state_mutex); |
1354 | ||
1355 | if (res != 0) | |
860dc736 | 1356 | return; |
1da177e4 | 1357 | |
86b87cde SN |
1358 | if (sdev->host->hostt->sdev_groups) |
1359 | sysfs_remove_groups(&sdev->sdev_gendev.kobj, | |
1360 | sdev->host->hostt->sdev_groups); | |
1361 | ||
860dc736 JB |
1362 | bsg_unregister_queue(sdev->request_queue); |
1363 | device_unregister(&sdev->sdev_dev); | |
1364 | transport_remove_device(dev); | |
e619e6cb BVA |
1365 | device_del(dev); |
1366 | } else | |
1367 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1368 | |
1369 | /* | |
1370 | * Stop accepting new requests and wait until all queuecommand() and | |
1371 | * scsi_run_queue() invocations have finished before tearing down the | |
1372 | * device. | |
1373 | */ | |
0db6ca8a | 1374 | mutex_lock(&sdev->state_mutex); |
1da177e4 | 1375 | scsi_device_set_state(sdev, SDEV_DEL); |
0db6ca8a BVA |
1376 | mutex_unlock(&sdev->state_mutex); |
1377 | ||
b485462a BVA |
1378 | blk_cleanup_queue(sdev->request_queue); |
1379 | cancel_work_sync(&sdev->requeue_work); | |
1380 | ||
1da177e4 LT |
1381 | if (sdev->host->hostt->slave_destroy) |
1382 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1383 | transport_destroy_device(dev); |
86cbfb56 | 1384 | |
e63ed0d7 JB |
1385 | /* |
1386 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1387 | * remoed sysfs visibility from the device, so make the target | |
1388 | * invisible if this was the last device underneath it. | |
1389 | */ | |
1390 | scsi_target_reap(scsi_target(sdev)); | |
1391 | ||
df133c21 | 1392 | put_device(dev); |
903f4fed AS |
1393 | } |
1394 | ||
1395 | /** | |
1396 | * scsi_remove_device - unregister a device from the scsi bus | |
1397 | * @sdev: scsi_device to unregister | |
1398 | **/ | |
1399 | void scsi_remove_device(struct scsi_device *sdev) | |
1400 | { | |
54195002 AS |
1401 | struct Scsi_Host *shost = sdev->host; |
1402 | ||
0b950672 | 1403 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1404 | __scsi_remove_device(sdev); |
0b950672 | 1405 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1406 | } |
1407 | EXPORT_SYMBOL(scsi_remove_device); | |
1408 | ||
44818efb | 1409 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1410 | { |
1411 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1412 | unsigned long flags; | |
a64358db | 1413 | struct scsi_device *sdev; |
1da177e4 LT |
1414 | |
1415 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1416 | restart: |
1417 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
fbce4d97 HR |
1418 | /* |
1419 | * We cannot call scsi_device_get() here, as | |
1420 | * we might've been called from rmmod() causing | |
1421 | * scsi_device_get() to fail the module_is_live() | |
1422 | * check. | |
1423 | */ | |
1da177e4 | 1424 | if (sdev->channel != starget->channel || |
81b6c999 HR |
1425 | sdev->id != starget->id) |
1426 | continue; | |
1427 | if (sdev->sdev_state == SDEV_DEL || | |
1428 | sdev->sdev_state == SDEV_CANCEL || | |
fbce4d97 | 1429 | !get_device(&sdev->sdev_gendev)) |
1da177e4 LT |
1430 | continue; |
1431 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1432 | scsi_remove_device(sdev); | |
fbce4d97 | 1433 | put_device(&sdev->sdev_gendev); |
1da177e4 | 1434 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1435 | goto restart; |
1da177e4 LT |
1436 | } |
1437 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1438 | } |
1439 | ||
1da177e4 LT |
1440 | /** |
1441 | * scsi_remove_target - try to remove a target and all its devices | |
1442 | * @dev: generic starget or parent of generic stargets to be removed | |
1443 | * | |
1444 | * Note: This is slightly racy. It is possible that if the user | |
1445 | * requests the addition of another device then the target won't be | |
1446 | * removed. | |
1447 | */ | |
1448 | void scsi_remove_target(struct device *dev) | |
1449 | { | |
3b661a92 | 1450 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
305c2e71 | 1451 | struct scsi_target *starget; |
3b661a92 DW |
1452 | unsigned long flags; |
1453 | ||
40998193 | 1454 | restart: |
3b661a92 DW |
1455 | spin_lock_irqsave(shost->host_lock, flags); |
1456 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e | 1457 | if (starget->state == STARGET_DEL || |
f9279c96 EM |
1458 | starget->state == STARGET_REMOVE || |
1459 | starget->state == STARGET_CREATED_REMOVE) | |
3b661a92 DW |
1460 | continue; |
1461 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1462 | kref_get(&starget->reap_ref); |
f9279c96 EM |
1463 | if (starget->state == STARGET_CREATED) |
1464 | starget->state = STARGET_CREATED_REMOVE; | |
1465 | else | |
1466 | starget->state = STARGET_REMOVE; | |
bc3f02a7 | 1467 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1468 | __scsi_remove_target(starget); |
40998193 CH |
1469 | scsi_target_reap(starget); |
1470 | goto restart; | |
3b661a92 | 1471 | } |
1da177e4 | 1472 | } |
3b661a92 | 1473 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1474 | } |
1475 | EXPORT_SYMBOL(scsi_remove_target); | |
1476 | ||
1477 | int scsi_register_driver(struct device_driver *drv) | |
1478 | { | |
1479 | drv->bus = &scsi_bus_type; | |
1480 | ||
1481 | return driver_register(drv); | |
1482 | } | |
1483 | EXPORT_SYMBOL(scsi_register_driver); | |
1484 | ||
1485 | int scsi_register_interface(struct class_interface *intf) | |
1486 | { | |
1487 | intf->class = &sdev_class; | |
1488 | ||
1489 | return class_interface_register(intf); | |
1490 | } | |
1491 | EXPORT_SYMBOL(scsi_register_interface); | |
1492 | ||
1da177e4 LT |
1493 | /** |
1494 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1495 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1496 | **/ |
1497 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1498 | { | |
1499 | int error, i; | |
1500 | ||
f7120a4f | 1501 | /* add host specific attributes */ |
1da177e4 LT |
1502 | if (shost->hostt->shost_attrs) { |
1503 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1504 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1505 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1506 | if (error) |
1507 | return error; | |
1508 | } | |
1509 | } | |
1510 | ||
1511 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1512 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1513 | return 0; |
1514 | } | |
1515 | ||
bfd12944 KS |
1516 | static struct device_type scsi_dev_type = { |
1517 | .name = "scsi_device", | |
1518 | .release = scsi_device_dev_release, | |
1519 | .groups = scsi_sdev_attr_groups, | |
1520 | }; | |
1521 | ||
1da177e4 LT |
1522 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1523 | { | |
1524 | unsigned long flags; | |
1525 | struct Scsi_Host *shost = sdev->host; | |
1526 | struct scsi_target *starget = sdev->sdev_target; | |
1527 | ||
1528 | device_initialize(&sdev->sdev_gendev); | |
1529 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1530 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1531 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1532 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1533 | ||
ee959b00 | 1534 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1535 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1536 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1537 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1538 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1539 | /* |
1540 | * Get a default scsi_level from the target (derived from sibling | |
1541 | * devices). This is the best we can do for guessing how to set | |
1542 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1543 | * setting doesn't matter, because all the bits are zero anyway. | |
1544 | * But it does matter for higher LUNs. | |
1545 | */ | |
7c9d6f16 | 1546 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1547 | if (sdev->scsi_level <= SCSI_2 && |
1548 | sdev->scsi_level != SCSI_UNKNOWN && | |
1549 | !shost->no_scsi2_lun_in_cdb) | |
1550 | sdev->lun_in_cdb = 1; | |
1551 | ||
1da177e4 LT |
1552 | transport_setup_device(&sdev->sdev_gendev); |
1553 | spin_lock_irqsave(shost->host_lock, flags); | |
1554 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1555 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1556 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1557 | /* |
1558 | * device can now only be removed via __scsi_remove_device() so hold | |
1559 | * the target. Target will be held in CREATED state until something | |
1560 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1561 | */ | |
1562 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1563 | } |
1564 | ||
1565 | int scsi_is_sdev_device(const struct device *dev) | |
1566 | { | |
13ba9bcb | 1567 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1568 | } |
1569 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1570 | ||
1571 | /* A blank transport template that is used in drivers that don't | |
1572 | * yet implement Transport Attributes */ | |
1573 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |