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> |
1da177e4 LT |
23 | |
24 | #include "scsi_priv.h" | |
25 | #include "scsi_logging.h" | |
26 | ||
b0ed4336 HR |
27 | static struct device_type scsi_dev_type; |
28 | ||
0ad78200 | 29 | static const struct { |
1da177e4 LT |
30 | enum scsi_device_state value; |
31 | char *name; | |
32 | } sdev_states[] = { | |
33 | { SDEV_CREATED, "created" }, | |
34 | { SDEV_RUNNING, "running" }, | |
35 | { SDEV_CANCEL, "cancel" }, | |
36 | { SDEV_DEL, "deleted" }, | |
37 | { SDEV_QUIESCE, "quiesce" }, | |
38 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 39 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 40 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 41 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
42 | }; |
43 | ||
44 | const char *scsi_device_state_name(enum scsi_device_state state) | |
45 | { | |
46 | int i; | |
47 | char *name = NULL; | |
48 | ||
6391a113 | 49 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
50 | if (sdev_states[i].value == state) { |
51 | name = sdev_states[i].name; | |
52 | break; | |
53 | } | |
54 | } | |
55 | return name; | |
56 | } | |
57 | ||
0ad78200 | 58 | static const struct { |
d3301874 MA |
59 | enum scsi_host_state value; |
60 | char *name; | |
61 | } shost_states[] = { | |
62 | { SHOST_CREATED, "created" }, | |
63 | { SHOST_RUNNING, "running" }, | |
64 | { SHOST_CANCEL, "cancel" }, | |
65 | { SHOST_DEL, "deleted" }, | |
66 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
67 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
68 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
69 | }; |
70 | const char *scsi_host_state_name(enum scsi_host_state state) | |
71 | { | |
72 | int i; | |
73 | char *name = NULL; | |
74 | ||
6391a113 | 75 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
76 | if (shost_states[i].value == state) { |
77 | name = shost_states[i].name; | |
78 | break; | |
79 | } | |
80 | } | |
81 | return name; | |
82 | } | |
83 | ||
d78540da | 84 | #ifdef CONFIG_SCSI_DH |
77c9df96 HR |
85 | static const struct { |
86 | unsigned char value; | |
87 | char *name; | |
88 | } sdev_access_states[] = { | |
89 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, | |
90 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, | |
91 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, | |
92 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, | |
93 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, | |
94 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, | |
95 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, | |
96 | }; | |
97 | ||
d78540da | 98 | static const char *scsi_access_state_name(unsigned char state) |
77c9df96 HR |
99 | { |
100 | int i; | |
101 | char *name = NULL; | |
102 | ||
103 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { | |
104 | if (sdev_access_states[i].value == state) { | |
105 | name = sdev_access_states[i].name; | |
106 | break; | |
107 | } | |
108 | } | |
109 | return name; | |
110 | } | |
d78540da | 111 | #endif |
77c9df96 | 112 | |
9cb78c16 | 113 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
114 | { |
115 | char *last; | |
116 | ||
117 | if (strncmp(src, "-", 20) == 0) { | |
118 | *val = SCAN_WILD_CARD; | |
119 | } else { | |
120 | /* | |
121 | * Doesn't check for int overflow | |
122 | */ | |
9cb78c16 | 123 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
124 | if (*last != '\0') |
125 | return 1; | |
126 | } | |
127 | return 0; | |
128 | } | |
129 | ||
130 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
131 | { | |
9cb78c16 HR |
132 | char s1[15], s2[15], s3[17], junk; |
133 | unsigned long long channel, id, lun; | |
1da177e4 LT |
134 | int res; |
135 | ||
9cb78c16 | 136 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
137 | if (res != 3) |
138 | return -EINVAL; | |
139 | if (check_set(&channel, s1)) | |
140 | return -EINVAL; | |
141 | if (check_set(&id, s2)) | |
142 | return -EINVAL; | |
143 | if (check_set(&lun, s3)) | |
144 | return -EINVAL; | |
e02f3f59 CH |
145 | if (shost->transportt->user_scan) |
146 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
147 | else | |
1d645088 HR |
148 | res = scsi_scan_host_selected(shost, channel, id, lun, |
149 | SCSI_SCAN_MANUAL); | |
1da177e4 LT |
150 | return res; |
151 | } | |
152 | ||
153 | /* | |
154 | * shost_show_function: macro to create an attr function that can be used to | |
155 | * show a non-bit field. | |
156 | */ | |
157 | #define shost_show_function(name, field, format_string) \ | |
158 | static ssize_t \ | |
ee959b00 TJ |
159 | show_##name (struct device *dev, struct device_attribute *attr, \ |
160 | char *buf) \ | |
1da177e4 | 161 | { \ |
ee959b00 | 162 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
163 | return snprintf (buf, 20, format_string, shost->field); \ |
164 | } | |
165 | ||
166 | /* | |
167 | * shost_rd_attr: macro to create a function and attribute variable for a | |
168 | * read only field. | |
169 | */ | |
170 | #define shost_rd_attr2(name, field, format_string) \ | |
171 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 172 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
173 | |
174 | #define shost_rd_attr(field, format_string) \ | |
175 | shost_rd_attr2(field, field, format_string) | |
176 | ||
177 | /* | |
178 | * Create the actual show/store functions and data structures. | |
179 | */ | |
180 | ||
ee959b00 TJ |
181 | static ssize_t |
182 | store_scan(struct device *dev, struct device_attribute *attr, | |
183 | const char *buf, size_t count) | |
1da177e4 | 184 | { |
ee959b00 | 185 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
186 | int res; |
187 | ||
188 | res = scsi_scan(shost, buf); | |
189 | if (res == 0) | |
190 | res = count; | |
191 | return res; | |
192 | }; | |
ee959b00 | 193 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 194 | |
d3301874 | 195 | static ssize_t |
ee959b00 TJ |
196 | store_shost_state(struct device *dev, struct device_attribute *attr, |
197 | const char *buf, size_t count) | |
d3301874 MA |
198 | { |
199 | int i; | |
ee959b00 | 200 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
201 | enum scsi_host_state state = 0; |
202 | ||
6391a113 | 203 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
204 | const int len = strlen(shost_states[i].name); |
205 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
206 | buf[len] == '\n') { | |
207 | state = shost_states[i].value; | |
208 | break; | |
209 | } | |
210 | } | |
211 | if (!state) | |
212 | return -EINVAL; | |
213 | ||
214 | if (scsi_host_set_state(shost, state)) | |
215 | return -EINVAL; | |
216 | return count; | |
217 | } | |
218 | ||
219 | static ssize_t | |
ee959b00 | 220 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 221 | { |
ee959b00 | 222 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
223 | const char *name = scsi_host_state_name(shost->shost_state); |
224 | ||
225 | if (!name) | |
226 | return -EINVAL; | |
227 | ||
228 | return snprintf(buf, 20, "%s\n", name); | |
229 | } | |
230 | ||
ee959b00 | 231 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
d78540da | 232 | static struct device_attribute dev_attr_hstate = |
ee959b00 | 233 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
d3301874 | 234 | |
5dc2b89e FT |
235 | static ssize_t |
236 | show_shost_mode(unsigned int mode, char *buf) | |
237 | { | |
238 | ssize_t len = 0; | |
239 | ||
240 | if (mode & MODE_INITIATOR) | |
241 | len = sprintf(buf, "%s", "Initiator"); | |
242 | ||
243 | if (mode & MODE_TARGET) | |
244 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
245 | ||
246 | len += sprintf(buf + len, "\n"); | |
247 | ||
248 | return len; | |
249 | } | |
250 | ||
ee959b00 TJ |
251 | static ssize_t |
252 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
253 | char *buf) | |
5dc2b89e | 254 | { |
ee959b00 | 255 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 256 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 257 | |
7a39ac3f JB |
258 | if (supported_mode == MODE_UNKNOWN) |
259 | /* by default this should be initiator */ | |
260 | supported_mode = MODE_INITIATOR; | |
261 | ||
262 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
263 | } |
264 | ||
ee959b00 | 265 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 266 | |
ee959b00 TJ |
267 | static ssize_t |
268 | show_shost_active_mode(struct device *dev, | |
269 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 270 | { |
ee959b00 | 271 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
272 | |
273 | if (shost->active_mode == MODE_UNKNOWN) | |
274 | return snprintf(buf, 20, "unknown\n"); | |
275 | else | |
276 | return show_shost_mode(shost->active_mode, buf); | |
277 | } | |
278 | ||
ee959b00 | 279 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 280 | |
072f19b4 | 281 | static int check_reset_type(const char *str) |
29443691 | 282 | { |
072f19b4 | 283 | if (sysfs_streq(str, "adapter")) |
29443691 | 284 | return SCSI_ADAPTER_RESET; |
072f19b4 | 285 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
286 | return SCSI_FIRMWARE_RESET; |
287 | else | |
288 | return 0; | |
289 | } | |
290 | ||
291 | static ssize_t | |
292 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
293 | const char *buf, size_t count) | |
294 | { | |
295 | struct Scsi_Host *shost = class_to_shost(dev); | |
296 | struct scsi_host_template *sht = shost->hostt; | |
297 | int ret = -EINVAL; | |
29443691 VC |
298 | int type; |
299 | ||
072f19b4 | 300 | type = check_reset_type(buf); |
29443691 VC |
301 | if (!type) |
302 | goto exit_store_host_reset; | |
303 | ||
304 | if (sht->host_reset) | |
305 | ret = sht->host_reset(shost, type); | |
306 | ||
307 | exit_store_host_reset: | |
308 | if (ret == 0) | |
309 | ret = count; | |
310 | return ret; | |
311 | } | |
312 | ||
313 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
314 | ||
b4562022 HR |
315 | static ssize_t |
316 | show_shost_eh_deadline(struct device *dev, | |
317 | struct device_attribute *attr, char *buf) | |
318 | { | |
319 | struct Scsi_Host *shost = class_to_shost(dev); | |
320 | ||
bb3b621a RM |
321 | if (shost->eh_deadline == -1) |
322 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
323 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
324 | } |
325 | ||
326 | static ssize_t | |
327 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
328 | const char *buf, size_t count) | |
329 | { | |
330 | struct Scsi_Host *shost = class_to_shost(dev); | |
331 | int ret = -EINVAL; | |
bb3b621a | 332 | unsigned long deadline, flags; |
b4562022 | 333 | |
ad469a57 HR |
334 | if (shost->transportt && |
335 | (shost->transportt->eh_strategy_handler || | |
336 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
337 | return ret; |
338 | ||
bb3b621a RM |
339 | if (!strncmp(buf, "off", strlen("off"))) |
340 | deadline = -1; | |
341 | else { | |
342 | ret = kstrtoul(buf, 10, &deadline); | |
343 | if (ret) | |
344 | return ret; | |
345 | if (deadline * HZ > UINT_MAX) | |
346 | return -EINVAL; | |
347 | } | |
348 | ||
349 | spin_lock_irqsave(shost->host_lock, flags); | |
350 | if (scsi_host_in_recovery(shost)) | |
351 | ret = -EBUSY; | |
352 | else { | |
353 | if (deadline == -1) | |
354 | shost->eh_deadline = -1; | |
355 | else | |
b4562022 | 356 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
357 | |
358 | ret = count; | |
b4562022 | 359 | } |
bb3b621a RM |
360 | spin_unlock_irqrestore(shost->host_lock, flags); |
361 | ||
b4562022 HR |
362 | return ret; |
363 | } | |
364 | ||
365 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
366 | ||
d285203c | 367 | shost_rd_attr(use_blk_mq, "%d\n"); |
1da177e4 | 368 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 369 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 370 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 371 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 372 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 373 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
374 | shost_rd_attr(prot_capabilities, "%u\n"); |
375 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
376 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
377 | ||
74665016 CH |
378 | static ssize_t |
379 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
380 | { | |
381 | struct Scsi_Host *shost = class_to_shost(dev); | |
382 | return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy)); | |
383 | } | |
384 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
385 | ||
f7120a4f | 386 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 387 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
388 | &dev_attr_unique_id.attr, |
389 | &dev_attr_host_busy.attr, | |
390 | &dev_attr_cmd_per_lun.attr, | |
391 | &dev_attr_can_queue.attr, | |
392 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 393 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
394 | &dev_attr_unchecked_isa_dma.attr, |
395 | &dev_attr_proc_name.attr, | |
396 | &dev_attr_scan.attr, | |
397 | &dev_attr_hstate.attr, | |
398 | &dev_attr_supported_mode.attr, | |
399 | &dev_attr_active_mode.attr, | |
4469f987 MP |
400 | &dev_attr_prot_capabilities.attr, |
401 | &dev_attr_prot_guard_type.attr, | |
29443691 | 402 | &dev_attr_host_reset.attr, |
b4562022 | 403 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
404 | NULL |
405 | }; | |
406 | ||
d78540da | 407 | static struct attribute_group scsi_shost_attr_group = { |
f7120a4f HR |
408 | .attrs = scsi_sysfs_shost_attrs, |
409 | }; | |
410 | ||
a4dbd674 | 411 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 412 | &scsi_shost_attr_group, |
1da177e4 LT |
413 | NULL |
414 | }; | |
415 | ||
ee959b00 | 416 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
417 | { |
418 | struct scsi_device *sdev; | |
419 | ||
420 | sdev = class_to_sdev(class_dev); | |
421 | put_device(&sdev->sdev_gendev); | |
422 | } | |
423 | ||
65f27f38 | 424 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
425 | { |
426 | struct scsi_device *sdev; | |
427 | struct device *parent; | |
a341cd0f | 428 | struct list_head *this, *tmp; |
1da177e4 LT |
429 | unsigned long flags; |
430 | ||
65f27f38 DH |
431 | sdev = container_of(work, struct scsi_device, ew.work); |
432 | ||
23695e41 JN |
433 | scsi_dh_release_device(sdev); |
434 | ||
65f27f38 | 435 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
436 | |
437 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
438 | list_del(&sdev->siblings); |
439 | list_del(&sdev->same_target_siblings); | |
440 | list_del(&sdev->starved_entry); | |
441 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
442 | ||
a341cd0f JG |
443 | cancel_work_sync(&sdev->event_work); |
444 | ||
445 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
446 | struct scsi_event *evt; | |
447 | ||
448 | evt = list_entry(this, struct scsi_event, node); | |
449 | list_del(&evt->node); | |
450 | kfree(evt); | |
451 | } | |
452 | ||
e73e079b | 453 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
454 | /* NULL queue means the device can't be used */ |
455 | sdev->request_queue = NULL; | |
1da177e4 | 456 | |
b3ae8780 HR |
457 | kfree(sdev->vpd_pg83); |
458 | kfree(sdev->vpd_pg80); | |
1da177e4 LT |
459 | kfree(sdev->inquiry); |
460 | kfree(sdev); | |
461 | ||
462 | if (parent) | |
463 | put_device(parent); | |
464 | } | |
465 | ||
65110b21 JB |
466 | static void scsi_device_dev_release(struct device *dev) |
467 | { | |
ffedb452 | 468 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 469 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 470 | &sdp->ew); |
65110b21 JB |
471 | } |
472 | ||
52c1da39 | 473 | static struct class sdev_class = { |
1da177e4 | 474 | .name = "scsi_device", |
ee959b00 | 475 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
476 | }; |
477 | ||
478 | /* all probing is done in the individual ->probe routines */ | |
479 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
480 | { | |
b0ed4336 HR |
481 | struct scsi_device *sdp; |
482 | ||
483 | if (dev->type != &scsi_dev_type) | |
484 | return 0; | |
485 | ||
486 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
487 | if (sdp->no_uld_attach) |
488 | return 0; | |
489 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
490 | } | |
491 | ||
7eff2e7a | 492 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 493 | { |
1f42ea7b JB |
494 | struct scsi_device *sdev; |
495 | ||
496 | if (dev->type != &scsi_dev_type) | |
497 | return 0; | |
498 | ||
499 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 500 | |
7eff2e7a | 501 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
502 | return 0; |
503 | } | |
504 | ||
1da177e4 LT |
505 | struct bus_type scsi_bus_type = { |
506 | .name = "scsi", | |
507 | .match = scsi_bus_match, | |
d7b8bcb0 | 508 | .uevent = scsi_bus_uevent, |
aa338601 | 509 | #ifdef CONFIG_PM |
db5bd1e0 | 510 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 511 | #endif |
1da177e4 | 512 | }; |
a6a8d9f8 | 513 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
514 | |
515 | int scsi_sysfs_register(void) | |
516 | { | |
517 | int error; | |
518 | ||
519 | error = bus_register(&scsi_bus_type); | |
520 | if (!error) { | |
521 | error = class_register(&sdev_class); | |
522 | if (error) | |
523 | bus_unregister(&scsi_bus_type); | |
524 | } | |
525 | ||
526 | return error; | |
527 | } | |
528 | ||
529 | void scsi_sysfs_unregister(void) | |
530 | { | |
531 | class_unregister(&sdev_class); | |
532 | bus_unregister(&scsi_bus_type); | |
533 | } | |
534 | ||
535 | /* | |
536 | * sdev_show_function: macro to create an attr function that can be used to | |
537 | * show a non-bit field. | |
538 | */ | |
539 | #define sdev_show_function(field, format_string) \ | |
540 | static ssize_t \ | |
ee959b00 TJ |
541 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
542 | char *buf) \ | |
1da177e4 LT |
543 | { \ |
544 | struct scsi_device *sdev; \ | |
545 | sdev = to_scsi_device(dev); \ | |
546 | return snprintf (buf, 20, format_string, sdev->field); \ | |
547 | } \ | |
548 | ||
549 | /* | |
550 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
551 | * read only field. | |
552 | */ | |
553 | #define sdev_rd_attr(field, format_string) \ | |
554 | sdev_show_function(field, format_string) \ | |
555 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
556 | ||
557 | ||
558 | /* | |
160e7f67 | 559 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
560 | * read/write field. |
561 | */ | |
562 | #define sdev_rw_attr(field, format_string) \ | |
563 | sdev_show_function(field, format_string) \ | |
564 | \ | |
565 | static ssize_t \ | |
ee959b00 TJ |
566 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
567 | const char *buf, size_t count) \ | |
1da177e4 LT |
568 | { \ |
569 | struct scsi_device *sdev; \ | |
570 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 571 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
572 | return count; \ |
573 | } \ | |
574 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
575 | ||
576 | /* Currently we don't export bit fields, but we might in future, | |
577 | * so leave this code in */ | |
578 | #if 0 | |
579 | /* | |
580 | * sdev_rd_attr: create a function and attribute variable for a | |
581 | * read/write bit field. | |
582 | */ | |
583 | #define sdev_rw_attr_bit(field) \ | |
584 | sdev_show_function(field, "%d\n") \ | |
585 | \ | |
586 | static ssize_t \ | |
ee959b00 TJ |
587 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
588 | const char *buf, size_t count) \ | |
1da177e4 LT |
589 | { \ |
590 | int ret; \ | |
591 | struct scsi_device *sdev; \ | |
592 | ret = scsi_sdev_check_buf_bit(buf); \ | |
593 | if (ret >= 0) { \ | |
594 | sdev = to_scsi_device(dev); \ | |
595 | sdev->field = ret; \ | |
596 | ret = count; \ | |
597 | } \ | |
598 | return ret; \ | |
599 | } \ | |
600 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
601 | ||
602 | /* | |
603 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
604 | * else return -EINVAL. | |
605 | */ | |
606 | static int scsi_sdev_check_buf_bit(const char *buf) | |
607 | { | |
608 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
609 | if (buf[0] == '1') | |
610 | return 1; | |
611 | else if (buf[0] == '0') | |
612 | return 0; | |
613 | else | |
614 | return -EINVAL; | |
615 | } else | |
616 | return -EINVAL; | |
617 | } | |
618 | #endif | |
619 | /* | |
620 | * Create the actual show/store functions and data structures. | |
621 | */ | |
1da177e4 LT |
622 | sdev_rd_attr (type, "%d\n"); |
623 | sdev_rd_attr (scsi_level, "%d\n"); | |
624 | sdev_rd_attr (vendor, "%.8s\n"); | |
625 | sdev_rd_attr (model, "%.16s\n"); | |
626 | sdev_rd_attr (rev, "%.4s\n"); | |
627 | ||
71e75c97 CH |
628 | static ssize_t |
629 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
630 | char *buf) | |
631 | { | |
632 | struct scsi_device *sdev = to_scsi_device(dev); | |
633 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
634 | } | |
635 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
636 | ||
cd9070c9 CH |
637 | static ssize_t |
638 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
639 | char *buf) | |
640 | { | |
641 | struct scsi_device *sdev = to_scsi_device(dev); | |
642 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
643 | } | |
644 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
645 | ||
242f9dcb JA |
646 | /* |
647 | * TODO: can we make these symlinks to the block layer ones? | |
648 | */ | |
1da177e4 | 649 | static ssize_t |
10523b3b | 650 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
651 | { |
652 | struct scsi_device *sdev; | |
653 | sdev = to_scsi_device(dev); | |
242f9dcb | 654 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
655 | } |
656 | ||
657 | static ssize_t | |
ee959b00 TJ |
658 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
659 | const char *buf, size_t count) | |
1da177e4 LT |
660 | { |
661 | struct scsi_device *sdev; | |
662 | int timeout; | |
663 | sdev = to_scsi_device(dev); | |
664 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 665 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
666 | return count; |
667 | } | |
668 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
669 | ||
0816c925 MP |
670 | static ssize_t |
671 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
672 | { | |
673 | struct scsi_device *sdev; | |
674 | sdev = to_scsi_device(dev); | |
675 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
676 | } | |
677 | ||
678 | static ssize_t | |
679 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
680 | const char *buf, size_t count) | |
681 | { | |
682 | struct scsi_device *sdev; | |
683 | unsigned int eh_timeout; | |
684 | int err; | |
685 | ||
686 | if (!capable(CAP_SYS_ADMIN)) | |
687 | return -EACCES; | |
688 | ||
689 | sdev = to_scsi_device(dev); | |
690 | err = kstrtouint(buf, 10, &eh_timeout); | |
691 | if (err) | |
692 | return err; | |
693 | sdev->eh_timeout = eh_timeout * HZ; | |
694 | ||
695 | return count; | |
696 | } | |
697 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
698 | ||
1da177e4 | 699 | static ssize_t |
ee959b00 TJ |
700 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
701 | const char *buf, size_t count) | |
1da177e4 LT |
702 | { |
703 | scsi_rescan_device(dev); | |
704 | return count; | |
705 | } | |
706 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
707 | ||
ee959b00 TJ |
708 | static ssize_t |
709 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
710 | const char *buf, size_t count) | |
1da177e4 | 711 | { |
ac0ece91 TH |
712 | if (device_remove_file_self(dev, attr)) |
713 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
714 | return count; |
715 | }; | |
716 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
717 | ||
718 | static ssize_t | |
ee959b00 TJ |
719 | store_state_field(struct device *dev, struct device_attribute *attr, |
720 | const char *buf, size_t count) | |
1da177e4 LT |
721 | { |
722 | int i; | |
723 | struct scsi_device *sdev = to_scsi_device(dev); | |
724 | enum scsi_device_state state = 0; | |
725 | ||
6391a113 | 726 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
727 | const int len = strlen(sdev_states[i].name); |
728 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
729 | buf[len] == '\n') { | |
730 | state = sdev_states[i].value; | |
731 | break; | |
732 | } | |
733 | } | |
734 | if (!state) | |
735 | return -EINVAL; | |
736 | ||
737 | if (scsi_device_set_state(sdev, state)) | |
738 | return -EINVAL; | |
739 | return count; | |
740 | } | |
741 | ||
742 | static ssize_t | |
10523b3b | 743 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
744 | { |
745 | struct scsi_device *sdev = to_scsi_device(dev); | |
746 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
747 | ||
748 | if (!name) | |
749 | return -EINVAL; | |
750 | ||
751 | return snprintf(buf, 20, "%s\n", name); | |
752 | } | |
753 | ||
754 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
755 | ||
756 | static ssize_t | |
ee959b00 TJ |
757 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
758 | char *buf) | |
1da177e4 LT |
759 | { |
760 | struct scsi_device *sdev = to_scsi_device(dev); | |
761 | const char *name = "none"; | |
762 | ||
609aa22f | 763 | if (sdev->simple_tags) |
1da177e4 LT |
764 | name = "simple"; |
765 | ||
766 | return snprintf(buf, 20, "%s\n", name); | |
767 | } | |
768 | ||
276b20d0 HR |
769 | static ssize_t |
770 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
771 | const char *buf, size_t count) | |
772 | { | |
773 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 774 | |
efc3c1df | 775 | if (!sdev->tagged_supported) |
276b20d0 | 776 | return -EINVAL; |
efc3c1df CH |
777 | |
778 | sdev_printk(KERN_INFO, sdev, | |
779 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
780 | return count; |
781 | } | |
782 | ||
783 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
784 | store_queue_type_field); | |
1da177e4 | 785 | |
b3ae8780 HR |
786 | #define sdev_vpd_pg_attr(_page) \ |
787 | static ssize_t \ | |
788 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
789 | struct bin_attribute *bin_attr, \ | |
790 | char *buf, loff_t off, size_t count) \ | |
791 | { \ | |
792 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
793 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
09e2b0b1 | 794 | int ret; \ |
b3ae8780 HR |
795 | if (!sdev->vpd_##_page) \ |
796 | return -EINVAL; \ | |
09e2b0b1 HR |
797 | rcu_read_lock(); \ |
798 | ret = memory_read_from_buffer(buf, count, &off, \ | |
799 | rcu_dereference(sdev->vpd_##_page), \ | |
b3ae8780 | 800 | sdev->vpd_##_page##_len); \ |
09e2b0b1 HR |
801 | rcu_read_unlock(); \ |
802 | return ret; \ | |
b3ae8780 HR |
803 | } \ |
804 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
805 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
806 | .size = 0, \ | |
807 | .read = show_vpd_##_page, \ | |
808 | }; | |
809 | ||
810 | sdev_vpd_pg_attr(pg83); | |
811 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 812 | |
92e6246c JT |
813 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
814 | struct bin_attribute *bin_attr, | |
815 | char *buf, loff_t off, size_t count) | |
816 | { | |
817 | struct device *dev = container_of(kobj, struct device, kobj); | |
818 | struct scsi_device *sdev = to_scsi_device(dev); | |
819 | ||
820 | if (!sdev->inquiry) | |
821 | return -EINVAL; | |
822 | ||
823 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
824 | sdev->inquiry_len); | |
825 | } | |
826 | ||
827 | static struct bin_attribute dev_attr_inquiry = { | |
828 | .attr = { | |
829 | .name = "inquiry", | |
830 | .mode = S_IRUGO, | |
831 | }, | |
832 | .size = 0, | |
833 | .read = show_inquiry, | |
834 | }; | |
835 | ||
1da177e4 | 836 | static ssize_t |
b3ae8780 HR |
837 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
838 | char *buf) | |
1da177e4 LT |
839 | { |
840 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
841 | } | |
842 | ||
843 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
844 | ||
845 | #define show_sdev_iostat(field) \ | |
846 | static ssize_t \ | |
ee959b00 TJ |
847 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
848 | char *buf) \ | |
1da177e4 LT |
849 | { \ |
850 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
851 | unsigned long long count = atomic_read(&sdev->field); \ | |
852 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
853 | } \ | |
854 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
855 | ||
856 | show_sdev_iostat(iorequest_cnt); | |
857 | show_sdev_iostat(iodone_cnt); | |
858 | show_sdev_iostat(ioerr_cnt); | |
859 | ||
d7b8bcb0 MT |
860 | static ssize_t |
861 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
862 | { | |
863 | struct scsi_device *sdev; | |
864 | sdev = to_scsi_device(dev); | |
865 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
866 | } | |
867 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 868 | |
a341cd0f JG |
869 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
870 | static ssize_t \ | |
871 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 872 | char *buf) \ |
a341cd0f JG |
873 | { \ |
874 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
875 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
876 | return snprintf(buf, 20, "%d\n", val); \ | |
877 | } | |
878 | ||
879 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
880 | static ssize_t \ | |
ee959b00 | 881 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
882 | const char *buf, size_t count) \ |
883 | { \ | |
884 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
885 | int val = simple_strtoul(buf, NULL, 0); \ | |
886 | if (val == 0) \ | |
887 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
888 | else if (val == 1) \ | |
889 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
890 | else \ | |
891 | return -EINVAL; \ | |
892 | return count; \ | |
893 | } | |
894 | ||
895 | #define DECLARE_EVT(name, Cap_name) \ | |
896 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
897 | DECLARE_EVT_STORE(name, Cap_name) \ | |
898 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
899 | sdev_store_evt_##name); | |
900 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
901 | ||
902 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
903 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
904 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
905 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
906 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
907 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 908 | |
ee959b00 | 909 | static ssize_t |
276b20d0 HR |
910 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
911 | const char *buf, size_t count) | |
1da177e4 LT |
912 | { |
913 | int depth, retval; | |
914 | struct scsi_device *sdev = to_scsi_device(dev); | |
915 | struct scsi_host_template *sht = sdev->host->hostt; | |
916 | ||
917 | if (!sht->change_queue_depth) | |
918 | return -EINVAL; | |
919 | ||
920 | depth = simple_strtoul(buf, NULL, 0); | |
921 | ||
1278dd68 | 922 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
923 | return -EINVAL; |
924 | ||
db5ed4df | 925 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
926 | if (retval < 0) |
927 | return retval; | |
928 | ||
4a84067d VD |
929 | sdev->max_queue_depth = sdev->queue_depth; |
930 | ||
1da177e4 LT |
931 | return count; |
932 | } | |
276b20d0 | 933 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 934 | |
276b20d0 HR |
935 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
936 | sdev_store_queue_depth); | |
1da177e4 | 937 | |
248d4fe9 HR |
938 | static ssize_t |
939 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
940 | char *buf) | |
941 | { | |
942 | struct scsi_device *sdev = to_scsi_device(dev); | |
943 | ssize_t count; | |
944 | ||
945 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
946 | if (count > 0) { | |
947 | buf[count] = '\n'; | |
948 | count++; | |
949 | } | |
950 | return count; | |
951 | } | |
952 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
953 | ||
41f95dd2 HR |
954 | #ifdef CONFIG_SCSI_DH |
955 | static ssize_t | |
956 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
957 | char *buf) | |
958 | { | |
959 | struct scsi_device *sdev = to_scsi_device(dev); | |
960 | ||
961 | if (!sdev->handler) | |
962 | return snprintf(buf, 20, "detached\n"); | |
963 | ||
964 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
965 | } | |
966 | ||
967 | static ssize_t | |
968 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
969 | const char *buf, size_t count) | |
970 | { | |
971 | struct scsi_device *sdev = to_scsi_device(dev); | |
972 | int err = -EINVAL; | |
973 | ||
974 | if (sdev->sdev_state == SDEV_CANCEL || | |
975 | sdev->sdev_state == SDEV_DEL) | |
976 | return -ENODEV; | |
977 | ||
978 | if (!sdev->handler) { | |
979 | /* | |
980 | * Attach to a device handler | |
981 | */ | |
982 | err = scsi_dh_attach(sdev->request_queue, buf); | |
983 | } else if (!strncmp(buf, "activate", 8)) { | |
984 | /* | |
985 | * Activate a device handler | |
986 | */ | |
987 | if (sdev->handler->activate) | |
988 | err = sdev->handler->activate(sdev, NULL, NULL); | |
989 | else | |
990 | err = 0; | |
991 | } else if (!strncmp(buf, "detach", 6)) { | |
992 | /* | |
993 | * Detach from a device handler | |
994 | */ | |
995 | sdev_printk(KERN_WARNING, sdev, | |
996 | "can't detach handler %s.\n", | |
997 | sdev->handler->name); | |
998 | err = -EINVAL; | |
999 | } | |
1000 | ||
1001 | return err < 0 ? err : count; | |
1002 | } | |
1003 | ||
1004 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1005 | sdev_store_dh_state); | |
77c9df96 HR |
1006 | |
1007 | static ssize_t | |
1008 | sdev_show_access_state(struct device *dev, | |
1009 | struct device_attribute *attr, | |
1010 | char *buf) | |
1011 | { | |
1012 | struct scsi_device *sdev = to_scsi_device(dev); | |
1013 | unsigned char access_state; | |
1014 | const char *access_state_name; | |
1015 | ||
1016 | if (!sdev->handler) | |
1017 | return -EINVAL; | |
1018 | ||
1019 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1020 | access_state_name = scsi_access_state_name(access_state); | |
1021 | ||
1022 | return sprintf(buf, "%s\n", | |
1023 | access_state_name ? access_state_name : "unknown"); | |
1024 | } | |
1025 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1026 | ||
1027 | static ssize_t | |
1028 | sdev_show_preferred_path(struct device *dev, | |
1029 | struct device_attribute *attr, | |
1030 | char *buf) | |
1031 | { | |
1032 | struct scsi_device *sdev = to_scsi_device(dev); | |
1033 | ||
1034 | if (!sdev->handler) | |
1035 | return -EINVAL; | |
1036 | ||
1037 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1038 | return sprintf(buf, "1\n"); | |
1039 | else | |
1040 | return sprintf(buf, "0\n"); | |
1041 | } | |
1042 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1043 | #endif |
1044 | ||
4a84067d VD |
1045 | static ssize_t |
1046 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1047 | struct device_attribute *attr, | |
1048 | char *buf) | |
1049 | { | |
1050 | struct scsi_device *sdev; | |
1051 | sdev = to_scsi_device(dev); | |
1052 | return snprintf(buf, 20, "%u\n", | |
1053 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1054 | } | |
1055 | ||
1056 | static ssize_t | |
1057 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1058 | struct device_attribute *attr, | |
1059 | const char *buf, size_t count) | |
1060 | { | |
1061 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1062 | unsigned int period; |
4a84067d | 1063 | |
f7c65af5 | 1064 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1065 | return -EINVAL; |
1066 | ||
1067 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1068 | return count; |
4a84067d VD |
1069 | } |
1070 | ||
276b20d0 HR |
1071 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1072 | sdev_show_queue_ramp_up_period, | |
1073 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1074 | |
276b20d0 HR |
1075 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1076 | struct attribute *attr, int i) | |
1da177e4 | 1077 | { |
276b20d0 | 1078 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1079 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1080 | |
1da177e4 | 1081 | |
276b20d0 HR |
1082 | if (attr == &dev_attr_queue_depth.attr && |
1083 | !sdev->host->hostt->change_queue_depth) | |
1084 | return S_IRUGO; | |
1da177e4 | 1085 | |
276b20d0 HR |
1086 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1087 | !sdev->host->hostt->change_queue_depth) | |
1088 | return 0; | |
1da177e4 | 1089 | |
77c9df96 HR |
1090 | #ifdef CONFIG_SCSI_DH |
1091 | if (attr == &dev_attr_access_state.attr && | |
1092 | !sdev->handler) | |
1093 | return 0; | |
1094 | if (attr == &dev_attr_preferred_path.attr && | |
1095 | !sdev->handler) | |
1096 | return 0; | |
1097 | #endif | |
276b20d0 | 1098 | return attr->mode; |
1da177e4 LT |
1099 | } |
1100 | ||
7e47976b HR |
1101 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1102 | struct bin_attribute *attr, int i) | |
1103 | { | |
1104 | struct device *dev = container_of(kobj, struct device, kobj); | |
1105 | struct scsi_device *sdev = to_scsi_device(dev); | |
1106 | ||
1107 | ||
1108 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) | |
1109 | return 0; | |
1110 | ||
68887582 | 1111 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1112 | return 0; |
1113 | ||
1114 | return S_IRUGO; | |
1115 | } | |
1116 | ||
276b20d0 HR |
1117 | /* Default template for device attributes. May NOT be modified */ |
1118 | static struct attribute *scsi_sdev_attrs[] = { | |
1119 | &dev_attr_device_blocked.attr, | |
1120 | &dev_attr_type.attr, | |
1121 | &dev_attr_scsi_level.attr, | |
1122 | &dev_attr_device_busy.attr, | |
1123 | &dev_attr_vendor.attr, | |
1124 | &dev_attr_model.attr, | |
1125 | &dev_attr_rev.attr, | |
1126 | &dev_attr_rescan.attr, | |
1127 | &dev_attr_delete.attr, | |
1128 | &dev_attr_state.attr, | |
1129 | &dev_attr_timeout.attr, | |
1130 | &dev_attr_eh_timeout.attr, | |
1131 | &dev_attr_iocounterbits.attr, | |
1132 | &dev_attr_iorequest_cnt.attr, | |
1133 | &dev_attr_iodone_cnt.attr, | |
1134 | &dev_attr_ioerr_cnt.attr, | |
1135 | &dev_attr_modalias.attr, | |
1136 | &dev_attr_queue_depth.attr, | |
1137 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1138 | &dev_attr_wwid.attr, |
41f95dd2 HR |
1139 | #ifdef CONFIG_SCSI_DH |
1140 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1141 | &dev_attr_access_state.attr, |
1142 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1143 | #endif |
276b20d0 HR |
1144 | &dev_attr_queue_ramp_up_period.attr, |
1145 | REF_EVT(media_change), | |
1146 | REF_EVT(inquiry_change_reported), | |
1147 | REF_EVT(capacity_change_reported), | |
1148 | REF_EVT(soft_threshold_reached), | |
1149 | REF_EVT(mode_parameter_change_reported), | |
1150 | REF_EVT(lun_change_reported), | |
1151 | NULL | |
1152 | }; | |
1153 | ||
b3ae8780 HR |
1154 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1155 | &dev_attr_vpd_pg83, | |
1156 | &dev_attr_vpd_pg80, | |
92e6246c | 1157 | &dev_attr_inquiry, |
b3ae8780 HR |
1158 | NULL |
1159 | }; | |
276b20d0 HR |
1160 | static struct attribute_group scsi_sdev_attr_group = { |
1161 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1162 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1163 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1164 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1165 | }; |
1166 | ||
1167 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1168 | &scsi_sdev_attr_group, | |
1169 | NULL | |
1170 | }; | |
1171 | ||
643eb2d9 JB |
1172 | static int scsi_target_add(struct scsi_target *starget) |
1173 | { | |
1174 | int error; | |
1175 | ||
1176 | if (starget->state != STARGET_CREATED) | |
1177 | return 0; | |
1178 | ||
1179 | error = device_add(&starget->dev); | |
1180 | if (error) { | |
1181 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1182 | return error; |
1183 | } | |
1184 | transport_add_device(&starget->dev); | |
1185 | starget->state = STARGET_RUNNING; | |
1186 | ||
bc4f2401 AS |
1187 | pm_runtime_set_active(&starget->dev); |
1188 | pm_runtime_enable(&starget->dev); | |
1189 | device_enable_async_suspend(&starget->dev); | |
1190 | ||
643eb2d9 JB |
1191 | return 0; |
1192 | } | |
1193 | ||
1da177e4 LT |
1194 | /** |
1195 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1196 | * @sdev: scsi_device to add | |
1197 | * | |
1198 | * Return value: | |
1199 | * 0 on Success / non-zero on Failure | |
1200 | **/ | |
1201 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1202 | { | |
1203 | int error, i; | |
80ed71ce | 1204 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1205 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1206 | |
643eb2d9 JB |
1207 | error = scsi_target_add(starget); |
1208 | if (error) | |
1209 | return error; | |
1210 | ||
1211 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1212 | |
4cb077d9 | 1213 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1214 | scsi_autopm_get_target(starget); |
1215 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1216 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1217 | pm_runtime_enable(&sdev->sdev_gendev); | |
1218 | scsi_autopm_put_target(starget); | |
1219 | ||
bc4f2401 AS |
1220 | scsi_autopm_get_device(sdev); |
1221 | ||
086b91d0 | 1222 | error = scsi_dh_add_device(sdev); |
221255ae HR |
1223 | if (error) |
1224 | /* | |
1225 | * device_handler is optional, so any error can be ignored | |
1226 | */ | |
086b91d0 CH |
1227 | sdev_printk(KERN_INFO, sdev, |
1228 | "failed to add device handler: %d\n", error); | |
086b91d0 | 1229 | |
4cd2459c HR |
1230 | error = device_add(&sdev->sdev_gendev); |
1231 | if (error) { | |
1232 | sdev_printk(KERN_INFO, sdev, | |
1233 | "failed to add device: %d\n", error); | |
1234 | scsi_dh_remove_device(sdev); | |
1235 | return error; | |
1236 | } | |
1237 | ||
4cb077d9 | 1238 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1239 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1240 | if (error) { |
73d8c34f AS |
1241 | sdev_printk(KERN_INFO, sdev, |
1242 | "failed to add class device: %d\n", error); | |
086b91d0 | 1243 | scsi_dh_remove_device(sdev); |
860dc736 | 1244 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1245 | return error; |
1da177e4 | 1246 | } |
860dc736 JB |
1247 | transport_add_device(&sdev->sdev_gendev); |
1248 | sdev->is_visible = 1; | |
1da177e4 | 1249 | |
97f46ae4 | 1250 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1251 | |
1252 | if (error) | |
860dc736 JB |
1253 | /* we're treating error on bsg register as non-fatal, |
1254 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1255 | sdev_printk(KERN_INFO, sdev, |
1256 | "Failed to register bsg queue, errno=%d\n", error); | |
1257 | ||
bfd12944 | 1258 | /* add additional host specific attributes */ |
1da177e4 LT |
1259 | if (sdev->host->hostt->sdev_attrs) { |
1260 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1261 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1262 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1263 | if (error) |
ee37e09d | 1264 | return error; |
1da177e4 LT |
1265 | } |
1266 | } | |
1da177e4 | 1267 | |
6fe8c1db | 1268 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1269 | return error; |
1270 | } | |
1271 | ||
903f4fed | 1272 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1273 | { |
df133c21 JB |
1274 | struct device *dev = &sdev->sdev_gendev; |
1275 | ||
be821fd8 VK |
1276 | /* |
1277 | * This cleanup path is not reentrant and while it is impossible | |
1278 | * to get a new reference with scsi_device_get() someone can still | |
1279 | * hold a previously acquired one. | |
1280 | */ | |
1281 | if (sdev->sdev_state == SDEV_DEL) | |
1282 | return; | |
1283 | ||
860dc736 JB |
1284 | if (sdev->is_visible) { |
1285 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1286 | return; | |
1da177e4 | 1287 | |
860dc736 JB |
1288 | bsg_unregister_queue(sdev->request_queue); |
1289 | device_unregister(&sdev->sdev_dev); | |
1290 | transport_remove_device(dev); | |
086b91d0 | 1291 | scsi_dh_remove_device(sdev); |
e619e6cb BVA |
1292 | device_del(dev); |
1293 | } else | |
1294 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1295 | |
1296 | /* | |
1297 | * Stop accepting new requests and wait until all queuecommand() and | |
1298 | * scsi_run_queue() invocations have finished before tearing down the | |
1299 | * device. | |
1300 | */ | |
1da177e4 | 1301 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1302 | blk_cleanup_queue(sdev->request_queue); |
1303 | cancel_work_sync(&sdev->requeue_work); | |
1304 | ||
1da177e4 LT |
1305 | if (sdev->host->hostt->slave_destroy) |
1306 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1307 | transport_destroy_device(dev); |
86cbfb56 | 1308 | |
e63ed0d7 JB |
1309 | /* |
1310 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1311 | * remoed sysfs visibility from the device, so make the target | |
1312 | * invisible if this was the last device underneath it. | |
1313 | */ | |
1314 | scsi_target_reap(scsi_target(sdev)); | |
1315 | ||
df133c21 | 1316 | put_device(dev); |
903f4fed AS |
1317 | } |
1318 | ||
1319 | /** | |
1320 | * scsi_remove_device - unregister a device from the scsi bus | |
1321 | * @sdev: scsi_device to unregister | |
1322 | **/ | |
1323 | void scsi_remove_device(struct scsi_device *sdev) | |
1324 | { | |
54195002 AS |
1325 | struct Scsi_Host *shost = sdev->host; |
1326 | ||
0b950672 | 1327 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1328 | __scsi_remove_device(sdev); |
0b950672 | 1329 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1330 | } |
1331 | EXPORT_SYMBOL(scsi_remove_device); | |
1332 | ||
44818efb | 1333 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1334 | { |
1335 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1336 | unsigned long flags; | |
a64358db | 1337 | struct scsi_device *sdev; |
1da177e4 LT |
1338 | |
1339 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1340 | restart: |
1341 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1342 | if (sdev->channel != starget->channel || |
a64358db | 1343 | sdev->id != starget->id || |
546ae796 | 1344 | scsi_device_get(sdev)) |
1da177e4 LT |
1345 | continue; |
1346 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1347 | scsi_remove_device(sdev); | |
546ae796 | 1348 | scsi_device_put(sdev); |
1da177e4 | 1349 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1350 | goto restart; |
1da177e4 LT |
1351 | } |
1352 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1353 | } |
1354 | ||
1da177e4 LT |
1355 | /** |
1356 | * scsi_remove_target - try to remove a target and all its devices | |
1357 | * @dev: generic starget or parent of generic stargets to be removed | |
1358 | * | |
1359 | * Note: This is slightly racy. It is possible that if the user | |
1360 | * requests the addition of another device then the target won't be | |
1361 | * removed. | |
1362 | */ | |
1363 | void scsi_remove_target(struct device *dev) | |
1364 | { | |
3b661a92 | 1365 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
305c2e71 | 1366 | struct scsi_target *starget; |
3b661a92 DW |
1367 | unsigned long flags; |
1368 | ||
40998193 | 1369 | restart: |
3b661a92 DW |
1370 | spin_lock_irqsave(shost->host_lock, flags); |
1371 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e | 1372 | if (starget->state == STARGET_DEL || |
305c2e71 | 1373 | starget->state == STARGET_REMOVE) |
3b661a92 DW |
1374 | continue; |
1375 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1376 | kref_get(&starget->reap_ref); |
f05795d3 | 1377 | starget->state = STARGET_REMOVE; |
bc3f02a7 | 1378 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1379 | __scsi_remove_target(starget); |
40998193 CH |
1380 | scsi_target_reap(starget); |
1381 | goto restart; | |
3b661a92 | 1382 | } |
1da177e4 | 1383 | } |
3b661a92 | 1384 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1385 | } |
1386 | EXPORT_SYMBOL(scsi_remove_target); | |
1387 | ||
1388 | int scsi_register_driver(struct device_driver *drv) | |
1389 | { | |
1390 | drv->bus = &scsi_bus_type; | |
1391 | ||
1392 | return driver_register(drv); | |
1393 | } | |
1394 | EXPORT_SYMBOL(scsi_register_driver); | |
1395 | ||
1396 | int scsi_register_interface(struct class_interface *intf) | |
1397 | { | |
1398 | intf->class = &sdev_class; | |
1399 | ||
1400 | return class_interface_register(intf); | |
1401 | } | |
1402 | EXPORT_SYMBOL(scsi_register_interface); | |
1403 | ||
1da177e4 LT |
1404 | /** |
1405 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1406 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1407 | **/ |
1408 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1409 | { | |
1410 | int error, i; | |
1411 | ||
f7120a4f | 1412 | /* add host specific attributes */ |
1da177e4 LT |
1413 | if (shost->hostt->shost_attrs) { |
1414 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1415 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1416 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1417 | if (error) |
1418 | return error; | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1423 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1424 | return 0; |
1425 | } | |
1426 | ||
bfd12944 KS |
1427 | static struct device_type scsi_dev_type = { |
1428 | .name = "scsi_device", | |
1429 | .release = scsi_device_dev_release, | |
1430 | .groups = scsi_sdev_attr_groups, | |
1431 | }; | |
1432 | ||
1da177e4 LT |
1433 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1434 | { | |
1435 | unsigned long flags; | |
1436 | struct Scsi_Host *shost = sdev->host; | |
1437 | struct scsi_target *starget = sdev->sdev_target; | |
1438 | ||
1439 | device_initialize(&sdev->sdev_gendev); | |
1440 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1441 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1442 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1443 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1444 | ||
ee959b00 | 1445 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1446 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1447 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1448 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1449 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1450 | /* |
1451 | * Get a default scsi_level from the target (derived from sibling | |
1452 | * devices). This is the best we can do for guessing how to set | |
1453 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1454 | * setting doesn't matter, because all the bits are zero anyway. | |
1455 | * But it does matter for higher LUNs. | |
1456 | */ | |
7c9d6f16 | 1457 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1458 | if (sdev->scsi_level <= SCSI_2 && |
1459 | sdev->scsi_level != SCSI_UNKNOWN && | |
1460 | !shost->no_scsi2_lun_in_cdb) | |
1461 | sdev->lun_in_cdb = 1; | |
1462 | ||
1da177e4 LT |
1463 | transport_setup_device(&sdev->sdev_gendev); |
1464 | spin_lock_irqsave(shost->host_lock, flags); | |
1465 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1466 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1467 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1468 | /* |
1469 | * device can now only be removed via __scsi_remove_device() so hold | |
1470 | * the target. Target will be held in CREATED state until something | |
1471 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1472 | */ | |
1473 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1474 | } |
1475 | ||
1476 | int scsi_is_sdev_device(const struct device *dev) | |
1477 | { | |
13ba9bcb | 1478 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1479 | } |
1480 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1481 | ||
1482 | /* A blank transport template that is used in drivers that don't | |
1483 | * yet implement Transport Attributes */ | |
1484 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |