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 | |
148 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
149 | return res; |
150 | } | |
151 | ||
152 | /* | |
153 | * shost_show_function: macro to create an attr function that can be used to | |
154 | * show a non-bit field. | |
155 | */ | |
156 | #define shost_show_function(name, field, format_string) \ | |
157 | static ssize_t \ | |
ee959b00 TJ |
158 | show_##name (struct device *dev, struct device_attribute *attr, \ |
159 | char *buf) \ | |
1da177e4 | 160 | { \ |
ee959b00 | 161 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
162 | return snprintf (buf, 20, format_string, shost->field); \ |
163 | } | |
164 | ||
165 | /* | |
166 | * shost_rd_attr: macro to create a function and attribute variable for a | |
167 | * read only field. | |
168 | */ | |
169 | #define shost_rd_attr2(name, field, format_string) \ | |
170 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 171 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
172 | |
173 | #define shost_rd_attr(field, format_string) \ | |
174 | shost_rd_attr2(field, field, format_string) | |
175 | ||
176 | /* | |
177 | * Create the actual show/store functions and data structures. | |
178 | */ | |
179 | ||
ee959b00 TJ |
180 | static ssize_t |
181 | store_scan(struct device *dev, struct device_attribute *attr, | |
182 | const char *buf, size_t count) | |
1da177e4 | 183 | { |
ee959b00 | 184 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
185 | int res; |
186 | ||
187 | res = scsi_scan(shost, buf); | |
188 | if (res == 0) | |
189 | res = count; | |
190 | return res; | |
191 | }; | |
ee959b00 | 192 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 193 | |
d3301874 | 194 | static ssize_t |
ee959b00 TJ |
195 | store_shost_state(struct device *dev, struct device_attribute *attr, |
196 | const char *buf, size_t count) | |
d3301874 MA |
197 | { |
198 | int i; | |
ee959b00 | 199 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
200 | enum scsi_host_state state = 0; |
201 | ||
6391a113 | 202 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
203 | const int len = strlen(shost_states[i].name); |
204 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
205 | buf[len] == '\n') { | |
206 | state = shost_states[i].value; | |
207 | break; | |
208 | } | |
209 | } | |
210 | if (!state) | |
211 | return -EINVAL; | |
212 | ||
213 | if (scsi_host_set_state(shost, state)) | |
214 | return -EINVAL; | |
215 | return count; | |
216 | } | |
217 | ||
218 | static ssize_t | |
ee959b00 | 219 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 220 | { |
ee959b00 | 221 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
222 | const char *name = scsi_host_state_name(shost->shost_state); |
223 | ||
224 | if (!name) | |
225 | return -EINVAL; | |
226 | ||
227 | return snprintf(buf, 20, "%s\n", name); | |
228 | } | |
229 | ||
ee959b00 | 230 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
d78540da | 231 | static struct device_attribute dev_attr_hstate = |
ee959b00 | 232 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
d3301874 | 233 | |
5dc2b89e FT |
234 | static ssize_t |
235 | show_shost_mode(unsigned int mode, char *buf) | |
236 | { | |
237 | ssize_t len = 0; | |
238 | ||
239 | if (mode & MODE_INITIATOR) | |
240 | len = sprintf(buf, "%s", "Initiator"); | |
241 | ||
242 | if (mode & MODE_TARGET) | |
243 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
244 | ||
245 | len += sprintf(buf + len, "\n"); | |
246 | ||
247 | return len; | |
248 | } | |
249 | ||
ee959b00 TJ |
250 | static ssize_t |
251 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
252 | char *buf) | |
5dc2b89e | 253 | { |
ee959b00 | 254 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 255 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 256 | |
7a39ac3f JB |
257 | if (supported_mode == MODE_UNKNOWN) |
258 | /* by default this should be initiator */ | |
259 | supported_mode = MODE_INITIATOR; | |
260 | ||
261 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
262 | } |
263 | ||
ee959b00 | 264 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 265 | |
ee959b00 TJ |
266 | static ssize_t |
267 | show_shost_active_mode(struct device *dev, | |
268 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 269 | { |
ee959b00 | 270 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
271 | |
272 | if (shost->active_mode == MODE_UNKNOWN) | |
273 | return snprintf(buf, 20, "unknown\n"); | |
274 | else | |
275 | return show_shost_mode(shost->active_mode, buf); | |
276 | } | |
277 | ||
ee959b00 | 278 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 279 | |
072f19b4 | 280 | static int check_reset_type(const char *str) |
29443691 | 281 | { |
072f19b4 | 282 | if (sysfs_streq(str, "adapter")) |
29443691 | 283 | return SCSI_ADAPTER_RESET; |
072f19b4 | 284 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
285 | return SCSI_FIRMWARE_RESET; |
286 | else | |
287 | return 0; | |
288 | } | |
289 | ||
290 | static ssize_t | |
291 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
292 | const char *buf, size_t count) | |
293 | { | |
294 | struct Scsi_Host *shost = class_to_shost(dev); | |
295 | struct scsi_host_template *sht = shost->hostt; | |
296 | int ret = -EINVAL; | |
29443691 VC |
297 | int type; |
298 | ||
072f19b4 | 299 | type = check_reset_type(buf); |
29443691 VC |
300 | if (!type) |
301 | goto exit_store_host_reset; | |
302 | ||
303 | if (sht->host_reset) | |
304 | ret = sht->host_reset(shost, type); | |
305 | ||
306 | exit_store_host_reset: | |
307 | if (ret == 0) | |
308 | ret = count; | |
309 | return ret; | |
310 | } | |
311 | ||
312 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
313 | ||
b4562022 HR |
314 | static ssize_t |
315 | show_shost_eh_deadline(struct device *dev, | |
316 | struct device_attribute *attr, char *buf) | |
317 | { | |
318 | struct Scsi_Host *shost = class_to_shost(dev); | |
319 | ||
bb3b621a RM |
320 | if (shost->eh_deadline == -1) |
321 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
322 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
323 | } |
324 | ||
325 | static ssize_t | |
326 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
327 | const char *buf, size_t count) | |
328 | { | |
329 | struct Scsi_Host *shost = class_to_shost(dev); | |
330 | int ret = -EINVAL; | |
bb3b621a | 331 | unsigned long deadline, flags; |
b4562022 | 332 | |
ad469a57 HR |
333 | if (shost->transportt && |
334 | (shost->transportt->eh_strategy_handler || | |
335 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
336 | return ret; |
337 | ||
bb3b621a RM |
338 | if (!strncmp(buf, "off", strlen("off"))) |
339 | deadline = -1; | |
340 | else { | |
341 | ret = kstrtoul(buf, 10, &deadline); | |
342 | if (ret) | |
343 | return ret; | |
344 | if (deadline * HZ > UINT_MAX) | |
345 | return -EINVAL; | |
346 | } | |
347 | ||
348 | spin_lock_irqsave(shost->host_lock, flags); | |
349 | if (scsi_host_in_recovery(shost)) | |
350 | ret = -EBUSY; | |
351 | else { | |
352 | if (deadline == -1) | |
353 | shost->eh_deadline = -1; | |
354 | else | |
b4562022 | 355 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
356 | |
357 | ret = count; | |
b4562022 | 358 | } |
bb3b621a RM |
359 | spin_unlock_irqrestore(shost->host_lock, flags); |
360 | ||
b4562022 HR |
361 | return ret; |
362 | } | |
363 | ||
364 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
365 | ||
d285203c | 366 | shost_rd_attr(use_blk_mq, "%d\n"); |
1da177e4 | 367 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 368 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 369 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 370 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 371 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 372 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
373 | shost_rd_attr(prot_capabilities, "%u\n"); |
374 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
375 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
376 | ||
74665016 CH |
377 | static ssize_t |
378 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
379 | { | |
380 | struct Scsi_Host *shost = class_to_shost(dev); | |
381 | return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy)); | |
382 | } | |
383 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
384 | ||
f7120a4f | 385 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 386 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
387 | &dev_attr_unique_id.attr, |
388 | &dev_attr_host_busy.attr, | |
389 | &dev_attr_cmd_per_lun.attr, | |
390 | &dev_attr_can_queue.attr, | |
391 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 392 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
393 | &dev_attr_unchecked_isa_dma.attr, |
394 | &dev_attr_proc_name.attr, | |
395 | &dev_attr_scan.attr, | |
396 | &dev_attr_hstate.attr, | |
397 | &dev_attr_supported_mode.attr, | |
398 | &dev_attr_active_mode.attr, | |
4469f987 MP |
399 | &dev_attr_prot_capabilities.attr, |
400 | &dev_attr_prot_guard_type.attr, | |
29443691 | 401 | &dev_attr_host_reset.attr, |
b4562022 | 402 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
403 | NULL |
404 | }; | |
405 | ||
d78540da | 406 | static struct attribute_group scsi_shost_attr_group = { |
f7120a4f HR |
407 | .attrs = scsi_sysfs_shost_attrs, |
408 | }; | |
409 | ||
a4dbd674 | 410 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 411 | &scsi_shost_attr_group, |
1da177e4 LT |
412 | NULL |
413 | }; | |
414 | ||
ee959b00 | 415 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
416 | { |
417 | struct scsi_device *sdev; | |
418 | ||
419 | sdev = class_to_sdev(class_dev); | |
420 | put_device(&sdev->sdev_gendev); | |
421 | } | |
422 | ||
65f27f38 | 423 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
424 | { |
425 | struct scsi_device *sdev; | |
426 | struct device *parent; | |
a341cd0f | 427 | struct list_head *this, *tmp; |
1da177e4 LT |
428 | unsigned long flags; |
429 | ||
65f27f38 DH |
430 | sdev = container_of(work, struct scsi_device, ew.work); |
431 | ||
23695e41 JN |
432 | scsi_dh_release_device(sdev); |
433 | ||
65f27f38 | 434 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
435 | |
436 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
437 | list_del(&sdev->siblings); |
438 | list_del(&sdev->same_target_siblings); | |
439 | list_del(&sdev->starved_entry); | |
440 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
441 | ||
a341cd0f JG |
442 | cancel_work_sync(&sdev->event_work); |
443 | ||
444 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
445 | struct scsi_event *evt; | |
446 | ||
447 | evt = list_entry(this, struct scsi_event, node); | |
448 | list_del(&evt->node); | |
449 | kfree(evt); | |
450 | } | |
451 | ||
e73e079b | 452 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
453 | /* NULL queue means the device can't be used */ |
454 | sdev->request_queue = NULL; | |
1da177e4 | 455 | |
b3ae8780 HR |
456 | kfree(sdev->vpd_pg83); |
457 | kfree(sdev->vpd_pg80); | |
1da177e4 LT |
458 | kfree(sdev->inquiry); |
459 | kfree(sdev); | |
460 | ||
461 | if (parent) | |
462 | put_device(parent); | |
463 | } | |
464 | ||
65110b21 JB |
465 | static void scsi_device_dev_release(struct device *dev) |
466 | { | |
ffedb452 | 467 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 468 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 469 | &sdp->ew); |
65110b21 JB |
470 | } |
471 | ||
52c1da39 | 472 | static struct class sdev_class = { |
1da177e4 | 473 | .name = "scsi_device", |
ee959b00 | 474 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
475 | }; |
476 | ||
477 | /* all probing is done in the individual ->probe routines */ | |
478 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
479 | { | |
b0ed4336 HR |
480 | struct scsi_device *sdp; |
481 | ||
482 | if (dev->type != &scsi_dev_type) | |
483 | return 0; | |
484 | ||
485 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
486 | if (sdp->no_uld_attach) |
487 | return 0; | |
488 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
489 | } | |
490 | ||
7eff2e7a | 491 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 492 | { |
1f42ea7b JB |
493 | struct scsi_device *sdev; |
494 | ||
495 | if (dev->type != &scsi_dev_type) | |
496 | return 0; | |
497 | ||
498 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 499 | |
7eff2e7a | 500 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
501 | return 0; |
502 | } | |
503 | ||
1da177e4 LT |
504 | struct bus_type scsi_bus_type = { |
505 | .name = "scsi", | |
506 | .match = scsi_bus_match, | |
d7b8bcb0 | 507 | .uevent = scsi_bus_uevent, |
aa338601 | 508 | #ifdef CONFIG_PM |
db5bd1e0 | 509 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 510 | #endif |
1da177e4 | 511 | }; |
a6a8d9f8 | 512 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
513 | |
514 | int scsi_sysfs_register(void) | |
515 | { | |
516 | int error; | |
517 | ||
518 | error = bus_register(&scsi_bus_type); | |
519 | if (!error) { | |
520 | error = class_register(&sdev_class); | |
521 | if (error) | |
522 | bus_unregister(&scsi_bus_type); | |
523 | } | |
524 | ||
525 | return error; | |
526 | } | |
527 | ||
528 | void scsi_sysfs_unregister(void) | |
529 | { | |
530 | class_unregister(&sdev_class); | |
531 | bus_unregister(&scsi_bus_type); | |
532 | } | |
533 | ||
534 | /* | |
535 | * sdev_show_function: macro to create an attr function that can be used to | |
536 | * show a non-bit field. | |
537 | */ | |
538 | #define sdev_show_function(field, format_string) \ | |
539 | static ssize_t \ | |
ee959b00 TJ |
540 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
541 | char *buf) \ | |
1da177e4 LT |
542 | { \ |
543 | struct scsi_device *sdev; \ | |
544 | sdev = to_scsi_device(dev); \ | |
545 | return snprintf (buf, 20, format_string, sdev->field); \ | |
546 | } \ | |
547 | ||
548 | /* | |
549 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
550 | * read only field. | |
551 | */ | |
552 | #define sdev_rd_attr(field, format_string) \ | |
553 | sdev_show_function(field, format_string) \ | |
554 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
555 | ||
556 | ||
557 | /* | |
160e7f67 | 558 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
559 | * read/write field. |
560 | */ | |
561 | #define sdev_rw_attr(field, format_string) \ | |
562 | sdev_show_function(field, format_string) \ | |
563 | \ | |
564 | static ssize_t \ | |
ee959b00 TJ |
565 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
566 | const char *buf, size_t count) \ | |
1da177e4 LT |
567 | { \ |
568 | struct scsi_device *sdev; \ | |
569 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 570 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
571 | return count; \ |
572 | } \ | |
573 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
574 | ||
575 | /* Currently we don't export bit fields, but we might in future, | |
576 | * so leave this code in */ | |
577 | #if 0 | |
578 | /* | |
579 | * sdev_rd_attr: create a function and attribute variable for a | |
580 | * read/write bit field. | |
581 | */ | |
582 | #define sdev_rw_attr_bit(field) \ | |
583 | sdev_show_function(field, "%d\n") \ | |
584 | \ | |
585 | static ssize_t \ | |
ee959b00 TJ |
586 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
587 | const char *buf, size_t count) \ | |
1da177e4 LT |
588 | { \ |
589 | int ret; \ | |
590 | struct scsi_device *sdev; \ | |
591 | ret = scsi_sdev_check_buf_bit(buf); \ | |
592 | if (ret >= 0) { \ | |
593 | sdev = to_scsi_device(dev); \ | |
594 | sdev->field = ret; \ | |
595 | ret = count; \ | |
596 | } \ | |
597 | return ret; \ | |
598 | } \ | |
599 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
600 | ||
601 | /* | |
602 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
603 | * else return -EINVAL. | |
604 | */ | |
605 | static int scsi_sdev_check_buf_bit(const char *buf) | |
606 | { | |
607 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
608 | if (buf[0] == '1') | |
609 | return 1; | |
610 | else if (buf[0] == '0') | |
611 | return 0; | |
612 | else | |
613 | return -EINVAL; | |
614 | } else | |
615 | return -EINVAL; | |
616 | } | |
617 | #endif | |
618 | /* | |
619 | * Create the actual show/store functions and data structures. | |
620 | */ | |
1da177e4 LT |
621 | sdev_rd_attr (type, "%d\n"); |
622 | sdev_rd_attr (scsi_level, "%d\n"); | |
623 | sdev_rd_attr (vendor, "%.8s\n"); | |
624 | sdev_rd_attr (model, "%.16s\n"); | |
625 | sdev_rd_attr (rev, "%.4s\n"); | |
626 | ||
71e75c97 CH |
627 | static ssize_t |
628 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
629 | char *buf) | |
630 | { | |
631 | struct scsi_device *sdev = to_scsi_device(dev); | |
632 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
633 | } | |
634 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
635 | ||
cd9070c9 CH |
636 | static ssize_t |
637 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
638 | char *buf) | |
639 | { | |
640 | struct scsi_device *sdev = to_scsi_device(dev); | |
641 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
642 | } | |
643 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
644 | ||
242f9dcb JA |
645 | /* |
646 | * TODO: can we make these symlinks to the block layer ones? | |
647 | */ | |
1da177e4 | 648 | static ssize_t |
10523b3b | 649 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
650 | { |
651 | struct scsi_device *sdev; | |
652 | sdev = to_scsi_device(dev); | |
242f9dcb | 653 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
654 | } |
655 | ||
656 | static ssize_t | |
ee959b00 TJ |
657 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
658 | const char *buf, size_t count) | |
1da177e4 LT |
659 | { |
660 | struct scsi_device *sdev; | |
661 | int timeout; | |
662 | sdev = to_scsi_device(dev); | |
663 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 664 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
665 | return count; |
666 | } | |
667 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
668 | ||
0816c925 MP |
669 | static ssize_t |
670 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
671 | { | |
672 | struct scsi_device *sdev; | |
673 | sdev = to_scsi_device(dev); | |
674 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
675 | } | |
676 | ||
677 | static ssize_t | |
678 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
679 | const char *buf, size_t count) | |
680 | { | |
681 | struct scsi_device *sdev; | |
682 | unsigned int eh_timeout; | |
683 | int err; | |
684 | ||
685 | if (!capable(CAP_SYS_ADMIN)) | |
686 | return -EACCES; | |
687 | ||
688 | sdev = to_scsi_device(dev); | |
689 | err = kstrtouint(buf, 10, &eh_timeout); | |
690 | if (err) | |
691 | return err; | |
692 | sdev->eh_timeout = eh_timeout * HZ; | |
693 | ||
694 | return count; | |
695 | } | |
696 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
697 | ||
1da177e4 | 698 | static ssize_t |
ee959b00 TJ |
699 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
700 | const char *buf, size_t count) | |
1da177e4 LT |
701 | { |
702 | scsi_rescan_device(dev); | |
703 | return count; | |
704 | } | |
705 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
706 | ||
ee959b00 TJ |
707 | static ssize_t |
708 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
709 | const char *buf, size_t count) | |
1da177e4 | 710 | { |
ac0ece91 TH |
711 | if (device_remove_file_self(dev, attr)) |
712 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
713 | return count; |
714 | }; | |
715 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
716 | ||
717 | static ssize_t | |
ee959b00 TJ |
718 | store_state_field(struct device *dev, struct device_attribute *attr, |
719 | const char *buf, size_t count) | |
1da177e4 LT |
720 | { |
721 | int i; | |
722 | struct scsi_device *sdev = to_scsi_device(dev); | |
723 | enum scsi_device_state state = 0; | |
724 | ||
6391a113 | 725 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
726 | const int len = strlen(sdev_states[i].name); |
727 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
728 | buf[len] == '\n') { | |
729 | state = sdev_states[i].value; | |
730 | break; | |
731 | } | |
732 | } | |
733 | if (!state) | |
734 | return -EINVAL; | |
735 | ||
736 | if (scsi_device_set_state(sdev, state)) | |
737 | return -EINVAL; | |
738 | return count; | |
739 | } | |
740 | ||
741 | static ssize_t | |
10523b3b | 742 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
743 | { |
744 | struct scsi_device *sdev = to_scsi_device(dev); | |
745 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
746 | ||
747 | if (!name) | |
748 | return -EINVAL; | |
749 | ||
750 | return snprintf(buf, 20, "%s\n", name); | |
751 | } | |
752 | ||
753 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
754 | ||
755 | static ssize_t | |
ee959b00 TJ |
756 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
757 | char *buf) | |
1da177e4 LT |
758 | { |
759 | struct scsi_device *sdev = to_scsi_device(dev); | |
760 | const char *name = "none"; | |
761 | ||
609aa22f | 762 | if (sdev->simple_tags) |
1da177e4 LT |
763 | name = "simple"; |
764 | ||
765 | return snprintf(buf, 20, "%s\n", name); | |
766 | } | |
767 | ||
276b20d0 HR |
768 | static ssize_t |
769 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
770 | const char *buf, size_t count) | |
771 | { | |
772 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 773 | |
efc3c1df | 774 | if (!sdev->tagged_supported) |
276b20d0 | 775 | return -EINVAL; |
efc3c1df CH |
776 | |
777 | sdev_printk(KERN_INFO, sdev, | |
778 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
779 | return count; |
780 | } | |
781 | ||
782 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
783 | store_queue_type_field); | |
1da177e4 | 784 | |
b3ae8780 HR |
785 | #define sdev_vpd_pg_attr(_page) \ |
786 | static ssize_t \ | |
787 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
788 | struct bin_attribute *bin_attr, \ | |
789 | char *buf, loff_t off, size_t count) \ | |
790 | { \ | |
791 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
792 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
09e2b0b1 | 793 | int ret; \ |
b3ae8780 HR |
794 | if (!sdev->vpd_##_page) \ |
795 | return -EINVAL; \ | |
09e2b0b1 HR |
796 | rcu_read_lock(); \ |
797 | ret = memory_read_from_buffer(buf, count, &off, \ | |
798 | rcu_dereference(sdev->vpd_##_page), \ | |
b3ae8780 | 799 | sdev->vpd_##_page##_len); \ |
09e2b0b1 HR |
800 | rcu_read_unlock(); \ |
801 | return ret; \ | |
b3ae8780 HR |
802 | } \ |
803 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
804 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
805 | .size = 0, \ | |
806 | .read = show_vpd_##_page, \ | |
807 | }; | |
808 | ||
809 | sdev_vpd_pg_attr(pg83); | |
810 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 811 | |
92e6246c JT |
812 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
813 | struct bin_attribute *bin_attr, | |
814 | char *buf, loff_t off, size_t count) | |
815 | { | |
816 | struct device *dev = container_of(kobj, struct device, kobj); | |
817 | struct scsi_device *sdev = to_scsi_device(dev); | |
818 | ||
819 | if (!sdev->inquiry) | |
820 | return -EINVAL; | |
821 | ||
822 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
823 | sdev->inquiry_len); | |
824 | } | |
825 | ||
826 | static struct bin_attribute dev_attr_inquiry = { | |
827 | .attr = { | |
828 | .name = "inquiry", | |
829 | .mode = S_IRUGO, | |
830 | }, | |
831 | .size = 0, | |
832 | .read = show_inquiry, | |
833 | }; | |
834 | ||
1da177e4 | 835 | static ssize_t |
b3ae8780 HR |
836 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
837 | char *buf) | |
1da177e4 LT |
838 | { |
839 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
840 | } | |
841 | ||
842 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
843 | ||
844 | #define show_sdev_iostat(field) \ | |
845 | static ssize_t \ | |
ee959b00 TJ |
846 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
847 | char *buf) \ | |
1da177e4 LT |
848 | { \ |
849 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
850 | unsigned long long count = atomic_read(&sdev->field); \ | |
851 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
852 | } \ | |
853 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
854 | ||
855 | show_sdev_iostat(iorequest_cnt); | |
856 | show_sdev_iostat(iodone_cnt); | |
857 | show_sdev_iostat(ioerr_cnt); | |
858 | ||
d7b8bcb0 MT |
859 | static ssize_t |
860 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
861 | { | |
862 | struct scsi_device *sdev; | |
863 | sdev = to_scsi_device(dev); | |
864 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
865 | } | |
866 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 867 | |
a341cd0f JG |
868 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
869 | static ssize_t \ | |
870 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 871 | char *buf) \ |
a341cd0f JG |
872 | { \ |
873 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
874 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
875 | return snprintf(buf, 20, "%d\n", val); \ | |
876 | } | |
877 | ||
878 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
879 | static ssize_t \ | |
ee959b00 | 880 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
881 | const char *buf, size_t count) \ |
882 | { \ | |
883 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
884 | int val = simple_strtoul(buf, NULL, 0); \ | |
885 | if (val == 0) \ | |
886 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
887 | else if (val == 1) \ | |
888 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
889 | else \ | |
890 | return -EINVAL; \ | |
891 | return count; \ | |
892 | } | |
893 | ||
894 | #define DECLARE_EVT(name, Cap_name) \ | |
895 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
896 | DECLARE_EVT_STORE(name, Cap_name) \ | |
897 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
898 | sdev_store_evt_##name); | |
899 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
900 | ||
901 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
902 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
903 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
904 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
905 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
906 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 907 | |
ee959b00 | 908 | static ssize_t |
276b20d0 HR |
909 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
910 | const char *buf, size_t count) | |
1da177e4 LT |
911 | { |
912 | int depth, retval; | |
913 | struct scsi_device *sdev = to_scsi_device(dev); | |
914 | struct scsi_host_template *sht = sdev->host->hostt; | |
915 | ||
916 | if (!sht->change_queue_depth) | |
917 | return -EINVAL; | |
918 | ||
919 | depth = simple_strtoul(buf, NULL, 0); | |
920 | ||
1278dd68 | 921 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
922 | return -EINVAL; |
923 | ||
db5ed4df | 924 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
925 | if (retval < 0) |
926 | return retval; | |
927 | ||
4a84067d VD |
928 | sdev->max_queue_depth = sdev->queue_depth; |
929 | ||
1da177e4 LT |
930 | return count; |
931 | } | |
276b20d0 | 932 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 933 | |
276b20d0 HR |
934 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
935 | sdev_store_queue_depth); | |
1da177e4 | 936 | |
248d4fe9 HR |
937 | static ssize_t |
938 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
939 | char *buf) | |
940 | { | |
941 | struct scsi_device *sdev = to_scsi_device(dev); | |
942 | ssize_t count; | |
943 | ||
944 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
945 | if (count > 0) { | |
946 | buf[count] = '\n'; | |
947 | count++; | |
948 | } | |
949 | return count; | |
950 | } | |
951 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
952 | ||
41f95dd2 HR |
953 | #ifdef CONFIG_SCSI_DH |
954 | static ssize_t | |
955 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
956 | char *buf) | |
957 | { | |
958 | struct scsi_device *sdev = to_scsi_device(dev); | |
959 | ||
960 | if (!sdev->handler) | |
961 | return snprintf(buf, 20, "detached\n"); | |
962 | ||
963 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
964 | } | |
965 | ||
966 | static ssize_t | |
967 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
968 | const char *buf, size_t count) | |
969 | { | |
970 | struct scsi_device *sdev = to_scsi_device(dev); | |
971 | int err = -EINVAL; | |
972 | ||
973 | if (sdev->sdev_state == SDEV_CANCEL || | |
974 | sdev->sdev_state == SDEV_DEL) | |
975 | return -ENODEV; | |
976 | ||
977 | if (!sdev->handler) { | |
978 | /* | |
979 | * Attach to a device handler | |
980 | */ | |
981 | err = scsi_dh_attach(sdev->request_queue, buf); | |
982 | } else if (!strncmp(buf, "activate", 8)) { | |
983 | /* | |
984 | * Activate a device handler | |
985 | */ | |
986 | if (sdev->handler->activate) | |
987 | err = sdev->handler->activate(sdev, NULL, NULL); | |
988 | else | |
989 | err = 0; | |
990 | } else if (!strncmp(buf, "detach", 6)) { | |
991 | /* | |
992 | * Detach from a device handler | |
993 | */ | |
994 | sdev_printk(KERN_WARNING, sdev, | |
995 | "can't detach handler %s.\n", | |
996 | sdev->handler->name); | |
997 | err = -EINVAL; | |
998 | } | |
999 | ||
1000 | return err < 0 ? err : count; | |
1001 | } | |
1002 | ||
1003 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1004 | sdev_store_dh_state); | |
77c9df96 HR |
1005 | |
1006 | static ssize_t | |
1007 | sdev_show_access_state(struct device *dev, | |
1008 | struct device_attribute *attr, | |
1009 | char *buf) | |
1010 | { | |
1011 | struct scsi_device *sdev = to_scsi_device(dev); | |
1012 | unsigned char access_state; | |
1013 | const char *access_state_name; | |
1014 | ||
1015 | if (!sdev->handler) | |
1016 | return -EINVAL; | |
1017 | ||
1018 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1019 | access_state_name = scsi_access_state_name(access_state); | |
1020 | ||
1021 | return sprintf(buf, "%s\n", | |
1022 | access_state_name ? access_state_name : "unknown"); | |
1023 | } | |
1024 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1025 | ||
1026 | static ssize_t | |
1027 | sdev_show_preferred_path(struct device *dev, | |
1028 | struct device_attribute *attr, | |
1029 | char *buf) | |
1030 | { | |
1031 | struct scsi_device *sdev = to_scsi_device(dev); | |
1032 | ||
1033 | if (!sdev->handler) | |
1034 | return -EINVAL; | |
1035 | ||
1036 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1037 | return sprintf(buf, "1\n"); | |
1038 | else | |
1039 | return sprintf(buf, "0\n"); | |
1040 | } | |
1041 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1042 | #endif |
1043 | ||
4a84067d VD |
1044 | static ssize_t |
1045 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1046 | struct device_attribute *attr, | |
1047 | char *buf) | |
1048 | { | |
1049 | struct scsi_device *sdev; | |
1050 | sdev = to_scsi_device(dev); | |
1051 | return snprintf(buf, 20, "%u\n", | |
1052 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1053 | } | |
1054 | ||
1055 | static ssize_t | |
1056 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1057 | struct device_attribute *attr, | |
1058 | const char *buf, size_t count) | |
1059 | { | |
1060 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1061 | unsigned int period; |
4a84067d | 1062 | |
f7c65af5 | 1063 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1064 | return -EINVAL; |
1065 | ||
1066 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1067 | return count; |
4a84067d VD |
1068 | } |
1069 | ||
276b20d0 HR |
1070 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1071 | sdev_show_queue_ramp_up_period, | |
1072 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1073 | |
276b20d0 HR |
1074 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1075 | struct attribute *attr, int i) | |
1da177e4 | 1076 | { |
276b20d0 | 1077 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1078 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1079 | |
1da177e4 | 1080 | |
276b20d0 HR |
1081 | if (attr == &dev_attr_queue_depth.attr && |
1082 | !sdev->host->hostt->change_queue_depth) | |
1083 | return S_IRUGO; | |
1da177e4 | 1084 | |
276b20d0 HR |
1085 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1086 | !sdev->host->hostt->change_queue_depth) | |
1087 | return 0; | |
1da177e4 | 1088 | |
77c9df96 HR |
1089 | #ifdef CONFIG_SCSI_DH |
1090 | if (attr == &dev_attr_access_state.attr && | |
1091 | !sdev->handler) | |
1092 | return 0; | |
1093 | if (attr == &dev_attr_preferred_path.attr && | |
1094 | !sdev->handler) | |
1095 | return 0; | |
1096 | #endif | |
276b20d0 | 1097 | return attr->mode; |
1da177e4 LT |
1098 | } |
1099 | ||
7e47976b HR |
1100 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1101 | struct bin_attribute *attr, int i) | |
1102 | { | |
1103 | struct device *dev = container_of(kobj, struct device, kobj); | |
1104 | struct scsi_device *sdev = to_scsi_device(dev); | |
1105 | ||
1106 | ||
1107 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) | |
1108 | return 0; | |
1109 | ||
68887582 | 1110 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1111 | return 0; |
1112 | ||
1113 | return S_IRUGO; | |
1114 | } | |
1115 | ||
276b20d0 HR |
1116 | /* Default template for device attributes. May NOT be modified */ |
1117 | static struct attribute *scsi_sdev_attrs[] = { | |
1118 | &dev_attr_device_blocked.attr, | |
1119 | &dev_attr_type.attr, | |
1120 | &dev_attr_scsi_level.attr, | |
1121 | &dev_attr_device_busy.attr, | |
1122 | &dev_attr_vendor.attr, | |
1123 | &dev_attr_model.attr, | |
1124 | &dev_attr_rev.attr, | |
1125 | &dev_attr_rescan.attr, | |
1126 | &dev_attr_delete.attr, | |
1127 | &dev_attr_state.attr, | |
1128 | &dev_attr_timeout.attr, | |
1129 | &dev_attr_eh_timeout.attr, | |
1130 | &dev_attr_iocounterbits.attr, | |
1131 | &dev_attr_iorequest_cnt.attr, | |
1132 | &dev_attr_iodone_cnt.attr, | |
1133 | &dev_attr_ioerr_cnt.attr, | |
1134 | &dev_attr_modalias.attr, | |
1135 | &dev_attr_queue_depth.attr, | |
1136 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1137 | &dev_attr_wwid.attr, |
41f95dd2 HR |
1138 | #ifdef CONFIG_SCSI_DH |
1139 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1140 | &dev_attr_access_state.attr, |
1141 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1142 | #endif |
276b20d0 HR |
1143 | &dev_attr_queue_ramp_up_period.attr, |
1144 | REF_EVT(media_change), | |
1145 | REF_EVT(inquiry_change_reported), | |
1146 | REF_EVT(capacity_change_reported), | |
1147 | REF_EVT(soft_threshold_reached), | |
1148 | REF_EVT(mode_parameter_change_reported), | |
1149 | REF_EVT(lun_change_reported), | |
1150 | NULL | |
1151 | }; | |
1152 | ||
b3ae8780 HR |
1153 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1154 | &dev_attr_vpd_pg83, | |
1155 | &dev_attr_vpd_pg80, | |
92e6246c | 1156 | &dev_attr_inquiry, |
b3ae8780 HR |
1157 | NULL |
1158 | }; | |
276b20d0 HR |
1159 | static struct attribute_group scsi_sdev_attr_group = { |
1160 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1161 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1162 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1163 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1164 | }; |
1165 | ||
1166 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1167 | &scsi_sdev_attr_group, | |
1168 | NULL | |
1169 | }; | |
1170 | ||
643eb2d9 JB |
1171 | static int scsi_target_add(struct scsi_target *starget) |
1172 | { | |
1173 | int error; | |
1174 | ||
1175 | if (starget->state != STARGET_CREATED) | |
1176 | return 0; | |
1177 | ||
1178 | error = device_add(&starget->dev); | |
1179 | if (error) { | |
1180 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1181 | return error; |
1182 | } | |
1183 | transport_add_device(&starget->dev); | |
1184 | starget->state = STARGET_RUNNING; | |
1185 | ||
bc4f2401 AS |
1186 | pm_runtime_set_active(&starget->dev); |
1187 | pm_runtime_enable(&starget->dev); | |
1188 | device_enable_async_suspend(&starget->dev); | |
1189 | ||
643eb2d9 JB |
1190 | return 0; |
1191 | } | |
1192 | ||
1da177e4 LT |
1193 | /** |
1194 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1195 | * @sdev: scsi_device to add | |
1196 | * | |
1197 | * Return value: | |
1198 | * 0 on Success / non-zero on Failure | |
1199 | **/ | |
1200 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1201 | { | |
1202 | int error, i; | |
80ed71ce | 1203 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1204 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1205 | |
ee37e09d AS |
1206 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
1207 | if (error) | |
1da177e4 LT |
1208 | return error; |
1209 | ||
643eb2d9 JB |
1210 | error = scsi_target_add(starget); |
1211 | if (error) | |
1212 | return error; | |
1213 | ||
1214 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1215 | |
4cb077d9 | 1216 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1217 | scsi_autopm_get_target(starget); |
1218 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1219 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1220 | pm_runtime_enable(&sdev->sdev_gendev); | |
1221 | scsi_autopm_put_target(starget); | |
1222 | ||
bc4f2401 AS |
1223 | scsi_autopm_get_device(sdev); |
1224 | ||
086b91d0 | 1225 | error = scsi_dh_add_device(sdev); |
221255ae HR |
1226 | if (error) |
1227 | /* | |
1228 | * device_handler is optional, so any error can be ignored | |
1229 | */ | |
086b91d0 CH |
1230 | sdev_printk(KERN_INFO, sdev, |
1231 | "failed to add device handler: %d\n", error); | |
086b91d0 | 1232 | |
4cd2459c HR |
1233 | error = device_add(&sdev->sdev_gendev); |
1234 | if (error) { | |
1235 | sdev_printk(KERN_INFO, sdev, | |
1236 | "failed to add device: %d\n", error); | |
1237 | scsi_dh_remove_device(sdev); | |
1238 | return error; | |
1239 | } | |
1240 | ||
4cb077d9 | 1241 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1242 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1243 | if (error) { |
73d8c34f AS |
1244 | sdev_printk(KERN_INFO, sdev, |
1245 | "failed to add class device: %d\n", error); | |
086b91d0 | 1246 | scsi_dh_remove_device(sdev); |
860dc736 | 1247 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1248 | return error; |
1da177e4 | 1249 | } |
860dc736 JB |
1250 | transport_add_device(&sdev->sdev_gendev); |
1251 | sdev->is_visible = 1; | |
1da177e4 | 1252 | |
97f46ae4 | 1253 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1254 | |
1255 | if (error) | |
860dc736 JB |
1256 | /* we're treating error on bsg register as non-fatal, |
1257 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1258 | sdev_printk(KERN_INFO, sdev, |
1259 | "Failed to register bsg queue, errno=%d\n", error); | |
1260 | ||
bfd12944 | 1261 | /* add additional host specific attributes */ |
1da177e4 LT |
1262 | if (sdev->host->hostt->sdev_attrs) { |
1263 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1264 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1265 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1266 | if (error) |
ee37e09d | 1267 | return error; |
1da177e4 LT |
1268 | } |
1269 | } | |
1da177e4 | 1270 | |
6fe8c1db | 1271 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1272 | return error; |
1273 | } | |
1274 | ||
903f4fed | 1275 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1276 | { |
df133c21 JB |
1277 | struct device *dev = &sdev->sdev_gendev; |
1278 | ||
be821fd8 VK |
1279 | /* |
1280 | * This cleanup path is not reentrant and while it is impossible | |
1281 | * to get a new reference with scsi_device_get() someone can still | |
1282 | * hold a previously acquired one. | |
1283 | */ | |
1284 | if (sdev->sdev_state == SDEV_DEL) | |
1285 | return; | |
1286 | ||
860dc736 JB |
1287 | if (sdev->is_visible) { |
1288 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1289 | return; | |
1da177e4 | 1290 | |
860dc736 JB |
1291 | bsg_unregister_queue(sdev->request_queue); |
1292 | device_unregister(&sdev->sdev_dev); | |
1293 | transport_remove_device(dev); | |
086b91d0 | 1294 | scsi_dh_remove_device(sdev); |
e619e6cb BVA |
1295 | device_del(dev); |
1296 | } else | |
1297 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1298 | |
1299 | /* | |
1300 | * Stop accepting new requests and wait until all queuecommand() and | |
1301 | * scsi_run_queue() invocations have finished before tearing down the | |
1302 | * device. | |
1303 | */ | |
1da177e4 | 1304 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1305 | blk_cleanup_queue(sdev->request_queue); |
1306 | cancel_work_sync(&sdev->requeue_work); | |
1307 | ||
1da177e4 LT |
1308 | if (sdev->host->hostt->slave_destroy) |
1309 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1310 | transport_destroy_device(dev); |
86cbfb56 | 1311 | |
e63ed0d7 JB |
1312 | /* |
1313 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1314 | * remoed sysfs visibility from the device, so make the target | |
1315 | * invisible if this was the last device underneath it. | |
1316 | */ | |
1317 | scsi_target_reap(scsi_target(sdev)); | |
1318 | ||
df133c21 | 1319 | put_device(dev); |
903f4fed AS |
1320 | } |
1321 | ||
1322 | /** | |
1323 | * scsi_remove_device - unregister a device from the scsi bus | |
1324 | * @sdev: scsi_device to unregister | |
1325 | **/ | |
1326 | void scsi_remove_device(struct scsi_device *sdev) | |
1327 | { | |
54195002 AS |
1328 | struct Scsi_Host *shost = sdev->host; |
1329 | ||
0b950672 | 1330 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1331 | __scsi_remove_device(sdev); |
0b950672 | 1332 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1333 | } |
1334 | EXPORT_SYMBOL(scsi_remove_device); | |
1335 | ||
44818efb | 1336 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1337 | { |
1338 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1339 | unsigned long flags; | |
a64358db | 1340 | struct scsi_device *sdev; |
1da177e4 LT |
1341 | |
1342 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1343 | restart: |
1344 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1345 | if (sdev->channel != starget->channel || |
a64358db | 1346 | sdev->id != starget->id || |
546ae796 | 1347 | scsi_device_get(sdev)) |
1da177e4 LT |
1348 | continue; |
1349 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1350 | scsi_remove_device(sdev); | |
546ae796 | 1351 | scsi_device_put(sdev); |
1da177e4 | 1352 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1353 | goto restart; |
1da177e4 LT |
1354 | } |
1355 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1356 | } |
1357 | ||
1da177e4 LT |
1358 | /** |
1359 | * scsi_remove_target - try to remove a target and all its devices | |
1360 | * @dev: generic starget or parent of generic stargets to be removed | |
1361 | * | |
1362 | * Note: This is slightly racy. It is possible that if the user | |
1363 | * requests the addition of another device then the target won't be | |
1364 | * removed. | |
1365 | */ | |
1366 | void scsi_remove_target(struct device *dev) | |
1367 | { | |
3b661a92 | 1368 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
90a88d6e | 1369 | struct scsi_target *starget, *last_target = NULL; |
3b661a92 DW |
1370 | unsigned long flags; |
1371 | ||
40998193 | 1372 | restart: |
3b661a92 DW |
1373 | spin_lock_irqsave(shost->host_lock, flags); |
1374 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e JB |
1375 | if (starget->state == STARGET_DEL || |
1376 | starget == last_target) | |
3b661a92 DW |
1377 | continue; |
1378 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1379 | kref_get(&starget->reap_ref); |
90a88d6e | 1380 | last_target = starget; |
bc3f02a7 | 1381 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1382 | __scsi_remove_target(starget); |
40998193 CH |
1383 | scsi_target_reap(starget); |
1384 | goto restart; | |
3b661a92 | 1385 | } |
1da177e4 | 1386 | } |
3b661a92 | 1387 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1388 | } |
1389 | EXPORT_SYMBOL(scsi_remove_target); | |
1390 | ||
1391 | int scsi_register_driver(struct device_driver *drv) | |
1392 | { | |
1393 | drv->bus = &scsi_bus_type; | |
1394 | ||
1395 | return driver_register(drv); | |
1396 | } | |
1397 | EXPORT_SYMBOL(scsi_register_driver); | |
1398 | ||
1399 | int scsi_register_interface(struct class_interface *intf) | |
1400 | { | |
1401 | intf->class = &sdev_class; | |
1402 | ||
1403 | return class_interface_register(intf); | |
1404 | } | |
1405 | EXPORT_SYMBOL(scsi_register_interface); | |
1406 | ||
1da177e4 LT |
1407 | /** |
1408 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1409 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1410 | **/ |
1411 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1412 | { | |
1413 | int error, i; | |
1414 | ||
f7120a4f | 1415 | /* add host specific attributes */ |
1da177e4 LT |
1416 | if (shost->hostt->shost_attrs) { |
1417 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1418 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1419 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1420 | if (error) |
1421 | return error; | |
1422 | } | |
1423 | } | |
1424 | ||
1425 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1426 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1427 | return 0; |
1428 | } | |
1429 | ||
bfd12944 KS |
1430 | static struct device_type scsi_dev_type = { |
1431 | .name = "scsi_device", | |
1432 | .release = scsi_device_dev_release, | |
1433 | .groups = scsi_sdev_attr_groups, | |
1434 | }; | |
1435 | ||
1da177e4 LT |
1436 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1437 | { | |
1438 | unsigned long flags; | |
1439 | struct Scsi_Host *shost = sdev->host; | |
1440 | struct scsi_target *starget = sdev->sdev_target; | |
1441 | ||
1442 | device_initialize(&sdev->sdev_gendev); | |
1443 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1444 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1445 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1446 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1447 | ||
ee959b00 | 1448 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1449 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1450 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1451 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1452 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1453 | /* |
1454 | * Get a default scsi_level from the target (derived from sibling | |
1455 | * devices). This is the best we can do for guessing how to set | |
1456 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1457 | * setting doesn't matter, because all the bits are zero anyway. | |
1458 | * But it does matter for higher LUNs. | |
1459 | */ | |
7c9d6f16 | 1460 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1461 | if (sdev->scsi_level <= SCSI_2 && |
1462 | sdev->scsi_level != SCSI_UNKNOWN && | |
1463 | !shost->no_scsi2_lun_in_cdb) | |
1464 | sdev->lun_in_cdb = 1; | |
1465 | ||
1da177e4 LT |
1466 | transport_setup_device(&sdev->sdev_gendev); |
1467 | spin_lock_irqsave(shost->host_lock, flags); | |
1468 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1469 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1470 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1471 | /* |
1472 | * device can now only be removed via __scsi_remove_device() so hold | |
1473 | * the target. Target will be held in CREATED state until something | |
1474 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1475 | */ | |
1476 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1477 | } |
1478 | ||
1479 | int scsi_is_sdev_device(const struct device *dev) | |
1480 | { | |
13ba9bcb | 1481 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1482 | } |
1483 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1484 | ||
1485 | /* A blank transport template that is used in drivers that don't | |
1486 | * yet implement Transport Attributes */ | |
1487 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |