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 | ||
77c9df96 HR |
84 | static const struct { |
85 | unsigned char value; | |
86 | char *name; | |
87 | } sdev_access_states[] = { | |
88 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, | |
89 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, | |
90 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, | |
91 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, | |
92 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, | |
93 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, | |
94 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, | |
95 | }; | |
96 | ||
97 | const char *scsi_access_state_name(unsigned char state) | |
98 | { | |
99 | int i; | |
100 | char *name = NULL; | |
101 | ||
102 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { | |
103 | if (sdev_access_states[i].value == state) { | |
104 | name = sdev_access_states[i].name; | |
105 | break; | |
106 | } | |
107 | } | |
108 | return name; | |
109 | } | |
110 | ||
9cb78c16 | 111 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
112 | { |
113 | char *last; | |
114 | ||
115 | if (strncmp(src, "-", 20) == 0) { | |
116 | *val = SCAN_WILD_CARD; | |
117 | } else { | |
118 | /* | |
119 | * Doesn't check for int overflow | |
120 | */ | |
9cb78c16 | 121 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
122 | if (*last != '\0') |
123 | return 1; | |
124 | } | |
125 | return 0; | |
126 | } | |
127 | ||
128 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
129 | { | |
9cb78c16 HR |
130 | char s1[15], s2[15], s3[17], junk; |
131 | unsigned long long channel, id, lun; | |
1da177e4 LT |
132 | int res; |
133 | ||
9cb78c16 | 134 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
135 | if (res != 3) |
136 | return -EINVAL; | |
137 | if (check_set(&channel, s1)) | |
138 | return -EINVAL; | |
139 | if (check_set(&id, s2)) | |
140 | return -EINVAL; | |
141 | if (check_set(&lun, s3)) | |
142 | return -EINVAL; | |
e02f3f59 CH |
143 | if (shost->transportt->user_scan) |
144 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
145 | else | |
146 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
147 | return res; |
148 | } | |
149 | ||
150 | /* | |
151 | * shost_show_function: macro to create an attr function that can be used to | |
152 | * show a non-bit field. | |
153 | */ | |
154 | #define shost_show_function(name, field, format_string) \ | |
155 | static ssize_t \ | |
ee959b00 TJ |
156 | show_##name (struct device *dev, struct device_attribute *attr, \ |
157 | char *buf) \ | |
1da177e4 | 158 | { \ |
ee959b00 | 159 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
160 | return snprintf (buf, 20, format_string, shost->field); \ |
161 | } | |
162 | ||
163 | /* | |
164 | * shost_rd_attr: macro to create a function and attribute variable for a | |
165 | * read only field. | |
166 | */ | |
167 | #define shost_rd_attr2(name, field, format_string) \ | |
168 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 169 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
170 | |
171 | #define shost_rd_attr(field, format_string) \ | |
172 | shost_rd_attr2(field, field, format_string) | |
173 | ||
174 | /* | |
175 | * Create the actual show/store functions and data structures. | |
176 | */ | |
177 | ||
ee959b00 TJ |
178 | static ssize_t |
179 | store_scan(struct device *dev, struct device_attribute *attr, | |
180 | const char *buf, size_t count) | |
1da177e4 | 181 | { |
ee959b00 | 182 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
183 | int res; |
184 | ||
185 | res = scsi_scan(shost, buf); | |
186 | if (res == 0) | |
187 | res = count; | |
188 | return res; | |
189 | }; | |
ee959b00 | 190 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 191 | |
d3301874 | 192 | static ssize_t |
ee959b00 TJ |
193 | store_shost_state(struct device *dev, struct device_attribute *attr, |
194 | const char *buf, size_t count) | |
d3301874 MA |
195 | { |
196 | int i; | |
ee959b00 | 197 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
198 | enum scsi_host_state state = 0; |
199 | ||
6391a113 | 200 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
201 | const int len = strlen(shost_states[i].name); |
202 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
203 | buf[len] == '\n') { | |
204 | state = shost_states[i].value; | |
205 | break; | |
206 | } | |
207 | } | |
208 | if (!state) | |
209 | return -EINVAL; | |
210 | ||
211 | if (scsi_host_set_state(shost, state)) | |
212 | return -EINVAL; | |
213 | return count; | |
214 | } | |
215 | ||
216 | static ssize_t | |
ee959b00 | 217 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 218 | { |
ee959b00 | 219 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
220 | const char *name = scsi_host_state_name(shost->shost_state); |
221 | ||
222 | if (!name) | |
223 | return -EINVAL; | |
224 | ||
225 | return snprintf(buf, 20, "%s\n", name); | |
226 | } | |
227 | ||
ee959b00 TJ |
228 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
229 | struct device_attribute dev_attr_hstate = | |
230 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
d3301874 | 231 | |
5dc2b89e FT |
232 | static ssize_t |
233 | show_shost_mode(unsigned int mode, char *buf) | |
234 | { | |
235 | ssize_t len = 0; | |
236 | ||
237 | if (mode & MODE_INITIATOR) | |
238 | len = sprintf(buf, "%s", "Initiator"); | |
239 | ||
240 | if (mode & MODE_TARGET) | |
241 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
242 | ||
243 | len += sprintf(buf + len, "\n"); | |
244 | ||
245 | return len; | |
246 | } | |
247 | ||
ee959b00 TJ |
248 | static ssize_t |
249 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
250 | char *buf) | |
5dc2b89e | 251 | { |
ee959b00 | 252 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 253 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 254 | |
7a39ac3f JB |
255 | if (supported_mode == MODE_UNKNOWN) |
256 | /* by default this should be initiator */ | |
257 | supported_mode = MODE_INITIATOR; | |
258 | ||
259 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
260 | } |
261 | ||
ee959b00 | 262 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 263 | |
ee959b00 TJ |
264 | static ssize_t |
265 | show_shost_active_mode(struct device *dev, | |
266 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 267 | { |
ee959b00 | 268 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
269 | |
270 | if (shost->active_mode == MODE_UNKNOWN) | |
271 | return snprintf(buf, 20, "unknown\n"); | |
272 | else | |
273 | return show_shost_mode(shost->active_mode, buf); | |
274 | } | |
275 | ||
ee959b00 | 276 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 277 | |
072f19b4 | 278 | static int check_reset_type(const char *str) |
29443691 | 279 | { |
072f19b4 | 280 | if (sysfs_streq(str, "adapter")) |
29443691 | 281 | return SCSI_ADAPTER_RESET; |
072f19b4 | 282 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
283 | return SCSI_FIRMWARE_RESET; |
284 | else | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static ssize_t | |
289 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
290 | const char *buf, size_t count) | |
291 | { | |
292 | struct Scsi_Host *shost = class_to_shost(dev); | |
293 | struct scsi_host_template *sht = shost->hostt; | |
294 | int ret = -EINVAL; | |
29443691 VC |
295 | int type; |
296 | ||
072f19b4 | 297 | type = check_reset_type(buf); |
29443691 VC |
298 | if (!type) |
299 | goto exit_store_host_reset; | |
300 | ||
301 | if (sht->host_reset) | |
302 | ret = sht->host_reset(shost, type); | |
303 | ||
304 | exit_store_host_reset: | |
305 | if (ret == 0) | |
306 | ret = count; | |
307 | return ret; | |
308 | } | |
309 | ||
310 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
311 | ||
b4562022 HR |
312 | static ssize_t |
313 | show_shost_eh_deadline(struct device *dev, | |
314 | struct device_attribute *attr, char *buf) | |
315 | { | |
316 | struct Scsi_Host *shost = class_to_shost(dev); | |
317 | ||
bb3b621a RM |
318 | if (shost->eh_deadline == -1) |
319 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
320 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
321 | } |
322 | ||
323 | static ssize_t | |
324 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
325 | const char *buf, size_t count) | |
326 | { | |
327 | struct Scsi_Host *shost = class_to_shost(dev); | |
328 | int ret = -EINVAL; | |
bb3b621a | 329 | unsigned long deadline, flags; |
b4562022 | 330 | |
ad469a57 HR |
331 | if (shost->transportt && |
332 | (shost->transportt->eh_strategy_handler || | |
333 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
334 | return ret; |
335 | ||
bb3b621a RM |
336 | if (!strncmp(buf, "off", strlen("off"))) |
337 | deadline = -1; | |
338 | else { | |
339 | ret = kstrtoul(buf, 10, &deadline); | |
340 | if (ret) | |
341 | return ret; | |
342 | if (deadline * HZ > UINT_MAX) | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
346 | spin_lock_irqsave(shost->host_lock, flags); | |
347 | if (scsi_host_in_recovery(shost)) | |
348 | ret = -EBUSY; | |
349 | else { | |
350 | if (deadline == -1) | |
351 | shost->eh_deadline = -1; | |
352 | else | |
b4562022 | 353 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
354 | |
355 | ret = count; | |
b4562022 | 356 | } |
bb3b621a RM |
357 | spin_unlock_irqrestore(shost->host_lock, flags); |
358 | ||
b4562022 HR |
359 | return ret; |
360 | } | |
361 | ||
362 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
363 | ||
d285203c | 364 | shost_rd_attr(use_blk_mq, "%d\n"); |
1da177e4 | 365 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 366 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 367 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 368 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 369 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 370 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
371 | shost_rd_attr(prot_capabilities, "%u\n"); |
372 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
373 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
374 | ||
74665016 CH |
375 | static ssize_t |
376 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
377 | { | |
378 | struct Scsi_Host *shost = class_to_shost(dev); | |
379 | return snprintf(buf, 20, "%d\n", atomic_read(&shost->host_busy)); | |
380 | } | |
381 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
382 | ||
f7120a4f | 383 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 384 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
385 | &dev_attr_unique_id.attr, |
386 | &dev_attr_host_busy.attr, | |
387 | &dev_attr_cmd_per_lun.attr, | |
388 | &dev_attr_can_queue.attr, | |
389 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 390 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
391 | &dev_attr_unchecked_isa_dma.attr, |
392 | &dev_attr_proc_name.attr, | |
393 | &dev_attr_scan.attr, | |
394 | &dev_attr_hstate.attr, | |
395 | &dev_attr_supported_mode.attr, | |
396 | &dev_attr_active_mode.attr, | |
4469f987 MP |
397 | &dev_attr_prot_capabilities.attr, |
398 | &dev_attr_prot_guard_type.attr, | |
29443691 | 399 | &dev_attr_host_reset.attr, |
b4562022 | 400 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
401 | NULL |
402 | }; | |
403 | ||
404 | struct attribute_group scsi_shost_attr_group = { | |
405 | .attrs = scsi_sysfs_shost_attrs, | |
406 | }; | |
407 | ||
a4dbd674 | 408 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 409 | &scsi_shost_attr_group, |
1da177e4 LT |
410 | NULL |
411 | }; | |
412 | ||
ee959b00 | 413 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
414 | { |
415 | struct scsi_device *sdev; | |
416 | ||
417 | sdev = class_to_sdev(class_dev); | |
418 | put_device(&sdev->sdev_gendev); | |
419 | } | |
420 | ||
65f27f38 | 421 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
422 | { |
423 | struct scsi_device *sdev; | |
424 | struct device *parent; | |
a341cd0f | 425 | struct list_head *this, *tmp; |
1da177e4 LT |
426 | unsigned long flags; |
427 | ||
65f27f38 DH |
428 | sdev = container_of(work, struct scsi_device, ew.work); |
429 | ||
23695e41 JN |
430 | scsi_dh_release_device(sdev); |
431 | ||
65f27f38 | 432 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
433 | |
434 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
435 | list_del(&sdev->siblings); |
436 | list_del(&sdev->same_target_siblings); | |
437 | list_del(&sdev->starved_entry); | |
438 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
439 | ||
a341cd0f JG |
440 | cancel_work_sync(&sdev->event_work); |
441 | ||
442 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
443 | struct scsi_event *evt; | |
444 | ||
445 | evt = list_entry(this, struct scsi_event, node); | |
446 | list_del(&evt->node); | |
447 | kfree(evt); | |
448 | } | |
449 | ||
e73e079b | 450 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
451 | /* NULL queue means the device can't be used */ |
452 | sdev->request_queue = NULL; | |
1da177e4 | 453 | |
b3ae8780 HR |
454 | kfree(sdev->vpd_pg83); |
455 | kfree(sdev->vpd_pg80); | |
1da177e4 LT |
456 | kfree(sdev->inquiry); |
457 | kfree(sdev); | |
458 | ||
459 | if (parent) | |
460 | put_device(parent); | |
461 | } | |
462 | ||
65110b21 JB |
463 | static void scsi_device_dev_release(struct device *dev) |
464 | { | |
ffedb452 | 465 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 466 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 467 | &sdp->ew); |
65110b21 JB |
468 | } |
469 | ||
52c1da39 | 470 | static struct class sdev_class = { |
1da177e4 | 471 | .name = "scsi_device", |
ee959b00 | 472 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
473 | }; |
474 | ||
475 | /* all probing is done in the individual ->probe routines */ | |
476 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
477 | { | |
b0ed4336 HR |
478 | struct scsi_device *sdp; |
479 | ||
480 | if (dev->type != &scsi_dev_type) | |
481 | return 0; | |
482 | ||
483 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
484 | if (sdp->no_uld_attach) |
485 | return 0; | |
486 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
487 | } | |
488 | ||
7eff2e7a | 489 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 490 | { |
1f42ea7b JB |
491 | struct scsi_device *sdev; |
492 | ||
493 | if (dev->type != &scsi_dev_type) | |
494 | return 0; | |
495 | ||
496 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 497 | |
7eff2e7a | 498 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
499 | return 0; |
500 | } | |
501 | ||
1da177e4 LT |
502 | struct bus_type scsi_bus_type = { |
503 | .name = "scsi", | |
504 | .match = scsi_bus_match, | |
d7b8bcb0 | 505 | .uevent = scsi_bus_uevent, |
aa338601 | 506 | #ifdef CONFIG_PM |
db5bd1e0 | 507 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 508 | #endif |
1da177e4 | 509 | }; |
a6a8d9f8 | 510 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
511 | |
512 | int scsi_sysfs_register(void) | |
513 | { | |
514 | int error; | |
515 | ||
516 | error = bus_register(&scsi_bus_type); | |
517 | if (!error) { | |
518 | error = class_register(&sdev_class); | |
519 | if (error) | |
520 | bus_unregister(&scsi_bus_type); | |
521 | } | |
522 | ||
523 | return error; | |
524 | } | |
525 | ||
526 | void scsi_sysfs_unregister(void) | |
527 | { | |
528 | class_unregister(&sdev_class); | |
529 | bus_unregister(&scsi_bus_type); | |
530 | } | |
531 | ||
532 | /* | |
533 | * sdev_show_function: macro to create an attr function that can be used to | |
534 | * show a non-bit field. | |
535 | */ | |
536 | #define sdev_show_function(field, format_string) \ | |
537 | static ssize_t \ | |
ee959b00 TJ |
538 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
539 | char *buf) \ | |
1da177e4 LT |
540 | { \ |
541 | struct scsi_device *sdev; \ | |
542 | sdev = to_scsi_device(dev); \ | |
543 | return snprintf (buf, 20, format_string, sdev->field); \ | |
544 | } \ | |
545 | ||
546 | /* | |
547 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
548 | * read only field. | |
549 | */ | |
550 | #define sdev_rd_attr(field, format_string) \ | |
551 | sdev_show_function(field, format_string) \ | |
552 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
553 | ||
554 | ||
555 | /* | |
160e7f67 | 556 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
557 | * read/write field. |
558 | */ | |
559 | #define sdev_rw_attr(field, format_string) \ | |
560 | sdev_show_function(field, format_string) \ | |
561 | \ | |
562 | static ssize_t \ | |
ee959b00 TJ |
563 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
564 | const char *buf, size_t count) \ | |
1da177e4 LT |
565 | { \ |
566 | struct scsi_device *sdev; \ | |
567 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 568 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
569 | return count; \ |
570 | } \ | |
571 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
572 | ||
573 | /* Currently we don't export bit fields, but we might in future, | |
574 | * so leave this code in */ | |
575 | #if 0 | |
576 | /* | |
577 | * sdev_rd_attr: create a function and attribute variable for a | |
578 | * read/write bit field. | |
579 | */ | |
580 | #define sdev_rw_attr_bit(field) \ | |
581 | sdev_show_function(field, "%d\n") \ | |
582 | \ | |
583 | static ssize_t \ | |
ee959b00 TJ |
584 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
585 | const char *buf, size_t count) \ | |
1da177e4 LT |
586 | { \ |
587 | int ret; \ | |
588 | struct scsi_device *sdev; \ | |
589 | ret = scsi_sdev_check_buf_bit(buf); \ | |
590 | if (ret >= 0) { \ | |
591 | sdev = to_scsi_device(dev); \ | |
592 | sdev->field = ret; \ | |
593 | ret = count; \ | |
594 | } \ | |
595 | return ret; \ | |
596 | } \ | |
597 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
598 | ||
599 | /* | |
600 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
601 | * else return -EINVAL. | |
602 | */ | |
603 | static int scsi_sdev_check_buf_bit(const char *buf) | |
604 | { | |
605 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
606 | if (buf[0] == '1') | |
607 | return 1; | |
608 | else if (buf[0] == '0') | |
609 | return 0; | |
610 | else | |
611 | return -EINVAL; | |
612 | } else | |
613 | return -EINVAL; | |
614 | } | |
615 | #endif | |
616 | /* | |
617 | * Create the actual show/store functions and data structures. | |
618 | */ | |
1da177e4 LT |
619 | sdev_rd_attr (type, "%d\n"); |
620 | sdev_rd_attr (scsi_level, "%d\n"); | |
621 | sdev_rd_attr (vendor, "%.8s\n"); | |
622 | sdev_rd_attr (model, "%.16s\n"); | |
623 | sdev_rd_attr (rev, "%.4s\n"); | |
624 | ||
71e75c97 CH |
625 | static ssize_t |
626 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
627 | char *buf) | |
628 | { | |
629 | struct scsi_device *sdev = to_scsi_device(dev); | |
630 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
631 | } | |
632 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
633 | ||
cd9070c9 CH |
634 | static ssize_t |
635 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
636 | char *buf) | |
637 | { | |
638 | struct scsi_device *sdev = to_scsi_device(dev); | |
639 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
640 | } | |
641 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
642 | ||
242f9dcb JA |
643 | /* |
644 | * TODO: can we make these symlinks to the block layer ones? | |
645 | */ | |
1da177e4 | 646 | static ssize_t |
10523b3b | 647 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
648 | { |
649 | struct scsi_device *sdev; | |
650 | sdev = to_scsi_device(dev); | |
242f9dcb | 651 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
652 | } |
653 | ||
654 | static ssize_t | |
ee959b00 TJ |
655 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
656 | const char *buf, size_t count) | |
1da177e4 LT |
657 | { |
658 | struct scsi_device *sdev; | |
659 | int timeout; | |
660 | sdev = to_scsi_device(dev); | |
661 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 662 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
663 | return count; |
664 | } | |
665 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
666 | ||
0816c925 MP |
667 | static ssize_t |
668 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
669 | { | |
670 | struct scsi_device *sdev; | |
671 | sdev = to_scsi_device(dev); | |
672 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
673 | } | |
674 | ||
675 | static ssize_t | |
676 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
677 | const char *buf, size_t count) | |
678 | { | |
679 | struct scsi_device *sdev; | |
680 | unsigned int eh_timeout; | |
681 | int err; | |
682 | ||
683 | if (!capable(CAP_SYS_ADMIN)) | |
684 | return -EACCES; | |
685 | ||
686 | sdev = to_scsi_device(dev); | |
687 | err = kstrtouint(buf, 10, &eh_timeout); | |
688 | if (err) | |
689 | return err; | |
690 | sdev->eh_timeout = eh_timeout * HZ; | |
691 | ||
692 | return count; | |
693 | } | |
694 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
695 | ||
1da177e4 | 696 | static ssize_t |
ee959b00 TJ |
697 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
698 | const char *buf, size_t count) | |
1da177e4 LT |
699 | { |
700 | scsi_rescan_device(dev); | |
701 | return count; | |
702 | } | |
703 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
704 | ||
ee959b00 TJ |
705 | static ssize_t |
706 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
707 | const char *buf, size_t count) | |
1da177e4 | 708 | { |
ac0ece91 TH |
709 | if (device_remove_file_self(dev, attr)) |
710 | scsi_remove_device(to_scsi_device(dev)); | |
1da177e4 LT |
711 | return count; |
712 | }; | |
713 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
714 | ||
715 | static ssize_t | |
ee959b00 TJ |
716 | store_state_field(struct device *dev, struct device_attribute *attr, |
717 | const char *buf, size_t count) | |
1da177e4 LT |
718 | { |
719 | int i; | |
720 | struct scsi_device *sdev = to_scsi_device(dev); | |
721 | enum scsi_device_state state = 0; | |
722 | ||
6391a113 | 723 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
724 | const int len = strlen(sdev_states[i].name); |
725 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
726 | buf[len] == '\n') { | |
727 | state = sdev_states[i].value; | |
728 | break; | |
729 | } | |
730 | } | |
731 | if (!state) | |
732 | return -EINVAL; | |
733 | ||
734 | if (scsi_device_set_state(sdev, state)) | |
735 | return -EINVAL; | |
736 | return count; | |
737 | } | |
738 | ||
739 | static ssize_t | |
10523b3b | 740 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
741 | { |
742 | struct scsi_device *sdev = to_scsi_device(dev); | |
743 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
744 | ||
745 | if (!name) | |
746 | return -EINVAL; | |
747 | ||
748 | return snprintf(buf, 20, "%s\n", name); | |
749 | } | |
750 | ||
751 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
752 | ||
753 | static ssize_t | |
ee959b00 TJ |
754 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
755 | char *buf) | |
1da177e4 LT |
756 | { |
757 | struct scsi_device *sdev = to_scsi_device(dev); | |
758 | const char *name = "none"; | |
759 | ||
609aa22f | 760 | if (sdev->simple_tags) |
1da177e4 LT |
761 | name = "simple"; |
762 | ||
763 | return snprintf(buf, 20, "%s\n", name); | |
764 | } | |
765 | ||
276b20d0 HR |
766 | static ssize_t |
767 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
768 | const char *buf, size_t count) | |
769 | { | |
770 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 771 | |
efc3c1df | 772 | if (!sdev->tagged_supported) |
276b20d0 | 773 | return -EINVAL; |
efc3c1df CH |
774 | |
775 | sdev_printk(KERN_INFO, sdev, | |
776 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
777 | return count; |
778 | } | |
779 | ||
780 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
781 | store_queue_type_field); | |
1da177e4 | 782 | |
b3ae8780 HR |
783 | #define sdev_vpd_pg_attr(_page) \ |
784 | static ssize_t \ | |
785 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
786 | struct bin_attribute *bin_attr, \ | |
787 | char *buf, loff_t off, size_t count) \ | |
788 | { \ | |
789 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
790 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
09e2b0b1 | 791 | int ret; \ |
b3ae8780 HR |
792 | if (!sdev->vpd_##_page) \ |
793 | return -EINVAL; \ | |
09e2b0b1 HR |
794 | rcu_read_lock(); \ |
795 | ret = memory_read_from_buffer(buf, count, &off, \ | |
796 | rcu_dereference(sdev->vpd_##_page), \ | |
b3ae8780 | 797 | sdev->vpd_##_page##_len); \ |
09e2b0b1 HR |
798 | rcu_read_unlock(); \ |
799 | return ret; \ | |
b3ae8780 HR |
800 | } \ |
801 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
802 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
803 | .size = 0, \ | |
804 | .read = show_vpd_##_page, \ | |
805 | }; | |
806 | ||
807 | sdev_vpd_pg_attr(pg83); | |
808 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 809 | |
92e6246c JT |
810 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
811 | struct bin_attribute *bin_attr, | |
812 | char *buf, loff_t off, size_t count) | |
813 | { | |
814 | struct device *dev = container_of(kobj, struct device, kobj); | |
815 | struct scsi_device *sdev = to_scsi_device(dev); | |
816 | ||
817 | if (!sdev->inquiry) | |
818 | return -EINVAL; | |
819 | ||
820 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
821 | sdev->inquiry_len); | |
822 | } | |
823 | ||
824 | static struct bin_attribute dev_attr_inquiry = { | |
825 | .attr = { | |
826 | .name = "inquiry", | |
827 | .mode = S_IRUGO, | |
828 | }, | |
829 | .size = 0, | |
830 | .read = show_inquiry, | |
831 | }; | |
832 | ||
1da177e4 | 833 | static ssize_t |
b3ae8780 HR |
834 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
835 | char *buf) | |
1da177e4 LT |
836 | { |
837 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
838 | } | |
839 | ||
840 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
841 | ||
842 | #define show_sdev_iostat(field) \ | |
843 | static ssize_t \ | |
ee959b00 TJ |
844 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
845 | char *buf) \ | |
1da177e4 LT |
846 | { \ |
847 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
848 | unsigned long long count = atomic_read(&sdev->field); \ | |
849 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
850 | } \ | |
851 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
852 | ||
853 | show_sdev_iostat(iorequest_cnt); | |
854 | show_sdev_iostat(iodone_cnt); | |
855 | show_sdev_iostat(ioerr_cnt); | |
856 | ||
d7b8bcb0 MT |
857 | static ssize_t |
858 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
859 | { | |
860 | struct scsi_device *sdev; | |
861 | sdev = to_scsi_device(dev); | |
862 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
863 | } | |
864 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 865 | |
a341cd0f JG |
866 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
867 | static ssize_t \ | |
868 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 869 | char *buf) \ |
a341cd0f JG |
870 | { \ |
871 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
872 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
873 | return snprintf(buf, 20, "%d\n", val); \ | |
874 | } | |
875 | ||
876 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
877 | static ssize_t \ | |
ee959b00 | 878 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
879 | const char *buf, size_t count) \ |
880 | { \ | |
881 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
882 | int val = simple_strtoul(buf, NULL, 0); \ | |
883 | if (val == 0) \ | |
884 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
885 | else if (val == 1) \ | |
886 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
887 | else \ | |
888 | return -EINVAL; \ | |
889 | return count; \ | |
890 | } | |
891 | ||
892 | #define DECLARE_EVT(name, Cap_name) \ | |
893 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
894 | DECLARE_EVT_STORE(name, Cap_name) \ | |
895 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
896 | sdev_store_evt_##name); | |
897 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
898 | ||
899 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
900 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
901 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
902 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
903 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
904 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 905 | |
ee959b00 | 906 | static ssize_t |
276b20d0 HR |
907 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
908 | const char *buf, size_t count) | |
1da177e4 LT |
909 | { |
910 | int depth, retval; | |
911 | struct scsi_device *sdev = to_scsi_device(dev); | |
912 | struct scsi_host_template *sht = sdev->host->hostt; | |
913 | ||
914 | if (!sht->change_queue_depth) | |
915 | return -EINVAL; | |
916 | ||
917 | depth = simple_strtoul(buf, NULL, 0); | |
918 | ||
1278dd68 | 919 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
920 | return -EINVAL; |
921 | ||
db5ed4df | 922 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
923 | if (retval < 0) |
924 | return retval; | |
925 | ||
4a84067d VD |
926 | sdev->max_queue_depth = sdev->queue_depth; |
927 | ||
1da177e4 LT |
928 | return count; |
929 | } | |
276b20d0 | 930 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 931 | |
276b20d0 HR |
932 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
933 | sdev_store_queue_depth); | |
1da177e4 | 934 | |
248d4fe9 HR |
935 | static ssize_t |
936 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
937 | char *buf) | |
938 | { | |
939 | struct scsi_device *sdev = to_scsi_device(dev); | |
940 | ssize_t count; | |
941 | ||
942 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
943 | if (count > 0) { | |
944 | buf[count] = '\n'; | |
945 | count++; | |
946 | } | |
947 | return count; | |
948 | } | |
949 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
950 | ||
41f95dd2 HR |
951 | #ifdef CONFIG_SCSI_DH |
952 | static ssize_t | |
953 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
954 | char *buf) | |
955 | { | |
956 | struct scsi_device *sdev = to_scsi_device(dev); | |
957 | ||
958 | if (!sdev->handler) | |
959 | return snprintf(buf, 20, "detached\n"); | |
960 | ||
961 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
962 | } | |
963 | ||
964 | static ssize_t | |
965 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
966 | const char *buf, size_t count) | |
967 | { | |
968 | struct scsi_device *sdev = to_scsi_device(dev); | |
969 | int err = -EINVAL; | |
970 | ||
971 | if (sdev->sdev_state == SDEV_CANCEL || | |
972 | sdev->sdev_state == SDEV_DEL) | |
973 | return -ENODEV; | |
974 | ||
975 | if (!sdev->handler) { | |
976 | /* | |
977 | * Attach to a device handler | |
978 | */ | |
979 | err = scsi_dh_attach(sdev->request_queue, buf); | |
980 | } else if (!strncmp(buf, "activate", 8)) { | |
981 | /* | |
982 | * Activate a device handler | |
983 | */ | |
984 | if (sdev->handler->activate) | |
985 | err = sdev->handler->activate(sdev, NULL, NULL); | |
986 | else | |
987 | err = 0; | |
988 | } else if (!strncmp(buf, "detach", 6)) { | |
989 | /* | |
990 | * Detach from a device handler | |
991 | */ | |
992 | sdev_printk(KERN_WARNING, sdev, | |
993 | "can't detach handler %s.\n", | |
994 | sdev->handler->name); | |
995 | err = -EINVAL; | |
996 | } | |
997 | ||
998 | return err < 0 ? err : count; | |
999 | } | |
1000 | ||
1001 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1002 | sdev_store_dh_state); | |
77c9df96 HR |
1003 | |
1004 | static ssize_t | |
1005 | sdev_show_access_state(struct device *dev, | |
1006 | struct device_attribute *attr, | |
1007 | char *buf) | |
1008 | { | |
1009 | struct scsi_device *sdev = to_scsi_device(dev); | |
1010 | unsigned char access_state; | |
1011 | const char *access_state_name; | |
1012 | ||
1013 | if (!sdev->handler) | |
1014 | return -EINVAL; | |
1015 | ||
1016 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1017 | access_state_name = scsi_access_state_name(access_state); | |
1018 | ||
1019 | return sprintf(buf, "%s\n", | |
1020 | access_state_name ? access_state_name : "unknown"); | |
1021 | } | |
1022 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1023 | ||
1024 | static ssize_t | |
1025 | sdev_show_preferred_path(struct device *dev, | |
1026 | struct device_attribute *attr, | |
1027 | char *buf) | |
1028 | { | |
1029 | struct scsi_device *sdev = to_scsi_device(dev); | |
1030 | ||
1031 | if (!sdev->handler) | |
1032 | return -EINVAL; | |
1033 | ||
1034 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1035 | return sprintf(buf, "1\n"); | |
1036 | else | |
1037 | return sprintf(buf, "0\n"); | |
1038 | } | |
1039 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1040 | #endif |
1041 | ||
4a84067d VD |
1042 | static ssize_t |
1043 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1044 | struct device_attribute *attr, | |
1045 | char *buf) | |
1046 | { | |
1047 | struct scsi_device *sdev; | |
1048 | sdev = to_scsi_device(dev); | |
1049 | return snprintf(buf, 20, "%u\n", | |
1050 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1051 | } | |
1052 | ||
1053 | static ssize_t | |
1054 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1055 | struct device_attribute *attr, | |
1056 | const char *buf, size_t count) | |
1057 | { | |
1058 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1059 | unsigned int period; |
4a84067d | 1060 | |
f7c65af5 | 1061 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1062 | return -EINVAL; |
1063 | ||
1064 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1065 | return count; |
4a84067d VD |
1066 | } |
1067 | ||
276b20d0 HR |
1068 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1069 | sdev_show_queue_ramp_up_period, | |
1070 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1071 | |
276b20d0 HR |
1072 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1073 | struct attribute *attr, int i) | |
1da177e4 | 1074 | { |
276b20d0 | 1075 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1076 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1077 | |
1da177e4 | 1078 | |
276b20d0 HR |
1079 | if (attr == &dev_attr_queue_depth.attr && |
1080 | !sdev->host->hostt->change_queue_depth) | |
1081 | return S_IRUGO; | |
1da177e4 | 1082 | |
276b20d0 HR |
1083 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1084 | !sdev->host->hostt->change_queue_depth) | |
1085 | return 0; | |
1da177e4 | 1086 | |
77c9df96 HR |
1087 | #ifdef CONFIG_SCSI_DH |
1088 | if (attr == &dev_attr_access_state.attr && | |
1089 | !sdev->handler) | |
1090 | return 0; | |
1091 | if (attr == &dev_attr_preferred_path.attr && | |
1092 | !sdev->handler) | |
1093 | return 0; | |
1094 | #endif | |
276b20d0 | 1095 | return attr->mode; |
1da177e4 LT |
1096 | } |
1097 | ||
7e47976b HR |
1098 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1099 | struct bin_attribute *attr, int i) | |
1100 | { | |
1101 | struct device *dev = container_of(kobj, struct device, kobj); | |
1102 | struct scsi_device *sdev = to_scsi_device(dev); | |
1103 | ||
1104 | ||
1105 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) | |
1106 | return 0; | |
1107 | ||
68887582 | 1108 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1109 | return 0; |
1110 | ||
1111 | return S_IRUGO; | |
1112 | } | |
1113 | ||
276b20d0 HR |
1114 | /* Default template for device attributes. May NOT be modified */ |
1115 | static struct attribute *scsi_sdev_attrs[] = { | |
1116 | &dev_attr_device_blocked.attr, | |
1117 | &dev_attr_type.attr, | |
1118 | &dev_attr_scsi_level.attr, | |
1119 | &dev_attr_device_busy.attr, | |
1120 | &dev_attr_vendor.attr, | |
1121 | &dev_attr_model.attr, | |
1122 | &dev_attr_rev.attr, | |
1123 | &dev_attr_rescan.attr, | |
1124 | &dev_attr_delete.attr, | |
1125 | &dev_attr_state.attr, | |
1126 | &dev_attr_timeout.attr, | |
1127 | &dev_attr_eh_timeout.attr, | |
1128 | &dev_attr_iocounterbits.attr, | |
1129 | &dev_attr_iorequest_cnt.attr, | |
1130 | &dev_attr_iodone_cnt.attr, | |
1131 | &dev_attr_ioerr_cnt.attr, | |
1132 | &dev_attr_modalias.attr, | |
1133 | &dev_attr_queue_depth.attr, | |
1134 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1135 | &dev_attr_wwid.attr, |
41f95dd2 HR |
1136 | #ifdef CONFIG_SCSI_DH |
1137 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1138 | &dev_attr_access_state.attr, |
1139 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1140 | #endif |
276b20d0 HR |
1141 | &dev_attr_queue_ramp_up_period.attr, |
1142 | REF_EVT(media_change), | |
1143 | REF_EVT(inquiry_change_reported), | |
1144 | REF_EVT(capacity_change_reported), | |
1145 | REF_EVT(soft_threshold_reached), | |
1146 | REF_EVT(mode_parameter_change_reported), | |
1147 | REF_EVT(lun_change_reported), | |
1148 | NULL | |
1149 | }; | |
1150 | ||
b3ae8780 HR |
1151 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1152 | &dev_attr_vpd_pg83, | |
1153 | &dev_attr_vpd_pg80, | |
92e6246c | 1154 | &dev_attr_inquiry, |
b3ae8780 HR |
1155 | NULL |
1156 | }; | |
276b20d0 HR |
1157 | static struct attribute_group scsi_sdev_attr_group = { |
1158 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1159 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1160 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1161 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1162 | }; |
1163 | ||
1164 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1165 | &scsi_sdev_attr_group, | |
1166 | NULL | |
1167 | }; | |
1168 | ||
643eb2d9 JB |
1169 | static int scsi_target_add(struct scsi_target *starget) |
1170 | { | |
1171 | int error; | |
1172 | ||
1173 | if (starget->state != STARGET_CREATED) | |
1174 | return 0; | |
1175 | ||
1176 | error = device_add(&starget->dev); | |
1177 | if (error) { | |
1178 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1179 | return error; |
1180 | } | |
1181 | transport_add_device(&starget->dev); | |
1182 | starget->state = STARGET_RUNNING; | |
1183 | ||
bc4f2401 AS |
1184 | pm_runtime_set_active(&starget->dev); |
1185 | pm_runtime_enable(&starget->dev); | |
1186 | device_enable_async_suspend(&starget->dev); | |
1187 | ||
643eb2d9 JB |
1188 | return 0; |
1189 | } | |
1190 | ||
1da177e4 LT |
1191 | /** |
1192 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1193 | * @sdev: scsi_device to add | |
1194 | * | |
1195 | * Return value: | |
1196 | * 0 on Success / non-zero on Failure | |
1197 | **/ | |
1198 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1199 | { | |
1200 | int error, i; | |
80ed71ce | 1201 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1202 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1203 | |
ee37e09d AS |
1204 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
1205 | if (error) | |
1da177e4 LT |
1206 | return error; |
1207 | ||
643eb2d9 JB |
1208 | error = scsi_target_add(starget); |
1209 | if (error) | |
1210 | return error; | |
1211 | ||
1212 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1213 | |
4cb077d9 | 1214 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1215 | scsi_autopm_get_target(starget); |
1216 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1217 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1218 | pm_runtime_enable(&sdev->sdev_gendev); | |
1219 | scsi_autopm_put_target(starget); | |
1220 | ||
bc4f2401 AS |
1221 | scsi_autopm_get_device(sdev); |
1222 | ||
086b91d0 | 1223 | error = scsi_dh_add_device(sdev); |
221255ae HR |
1224 | if (error) |
1225 | /* | |
1226 | * device_handler is optional, so any error can be ignored | |
1227 | */ | |
086b91d0 CH |
1228 | sdev_printk(KERN_INFO, sdev, |
1229 | "failed to add device handler: %d\n", error); | |
086b91d0 | 1230 | |
4cd2459c HR |
1231 | error = device_add(&sdev->sdev_gendev); |
1232 | if (error) { | |
1233 | sdev_printk(KERN_INFO, sdev, | |
1234 | "failed to add device: %d\n", error); | |
1235 | scsi_dh_remove_device(sdev); | |
1236 | return error; | |
1237 | } | |
1238 | ||
4cb077d9 | 1239 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1240 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1241 | if (error) { |
73d8c34f AS |
1242 | sdev_printk(KERN_INFO, sdev, |
1243 | "failed to add class device: %d\n", error); | |
086b91d0 | 1244 | scsi_dh_remove_device(sdev); |
860dc736 | 1245 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1246 | return error; |
1da177e4 | 1247 | } |
860dc736 JB |
1248 | transport_add_device(&sdev->sdev_gendev); |
1249 | sdev->is_visible = 1; | |
1da177e4 | 1250 | |
97f46ae4 | 1251 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
1252 | |
1253 | if (error) | |
860dc736 JB |
1254 | /* we're treating error on bsg register as non-fatal, |
1255 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1256 | sdev_printk(KERN_INFO, sdev, |
1257 | "Failed to register bsg queue, errno=%d\n", error); | |
1258 | ||
bfd12944 | 1259 | /* add additional host specific attributes */ |
1da177e4 LT |
1260 | if (sdev->host->hostt->sdev_attrs) { |
1261 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1262 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1263 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1264 | if (error) |
ee37e09d | 1265 | return error; |
1da177e4 LT |
1266 | } |
1267 | } | |
1da177e4 | 1268 | |
6fe8c1db | 1269 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1270 | return error; |
1271 | } | |
1272 | ||
903f4fed | 1273 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1274 | { |
df133c21 JB |
1275 | struct device *dev = &sdev->sdev_gendev; |
1276 | ||
be821fd8 VK |
1277 | /* |
1278 | * This cleanup path is not reentrant and while it is impossible | |
1279 | * to get a new reference with scsi_device_get() someone can still | |
1280 | * hold a previously acquired one. | |
1281 | */ | |
1282 | if (sdev->sdev_state == SDEV_DEL) | |
1283 | return; | |
1284 | ||
860dc736 JB |
1285 | if (sdev->is_visible) { |
1286 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
1287 | return; | |
1da177e4 | 1288 | |
860dc736 JB |
1289 | bsg_unregister_queue(sdev->request_queue); |
1290 | device_unregister(&sdev->sdev_dev); | |
1291 | transport_remove_device(dev); | |
086b91d0 | 1292 | scsi_dh_remove_device(sdev); |
e619e6cb BVA |
1293 | device_del(dev); |
1294 | } else | |
1295 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1296 | |
1297 | /* | |
1298 | * Stop accepting new requests and wait until all queuecommand() and | |
1299 | * scsi_run_queue() invocations have finished before tearing down the | |
1300 | * device. | |
1301 | */ | |
1da177e4 | 1302 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
1303 | blk_cleanup_queue(sdev->request_queue); |
1304 | cancel_work_sync(&sdev->requeue_work); | |
1305 | ||
1da177e4 LT |
1306 | if (sdev->host->hostt->slave_destroy) |
1307 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1308 | transport_destroy_device(dev); |
86cbfb56 | 1309 | |
e63ed0d7 JB |
1310 | /* |
1311 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1312 | * remoed sysfs visibility from the device, so make the target | |
1313 | * invisible if this was the last device underneath it. | |
1314 | */ | |
1315 | scsi_target_reap(scsi_target(sdev)); | |
1316 | ||
df133c21 | 1317 | put_device(dev); |
903f4fed AS |
1318 | } |
1319 | ||
1320 | /** | |
1321 | * scsi_remove_device - unregister a device from the scsi bus | |
1322 | * @sdev: scsi_device to unregister | |
1323 | **/ | |
1324 | void scsi_remove_device(struct scsi_device *sdev) | |
1325 | { | |
54195002 AS |
1326 | struct Scsi_Host *shost = sdev->host; |
1327 | ||
0b950672 | 1328 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1329 | __scsi_remove_device(sdev); |
0b950672 | 1330 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1331 | } |
1332 | EXPORT_SYMBOL(scsi_remove_device); | |
1333 | ||
44818efb | 1334 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1335 | { |
1336 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1337 | unsigned long flags; | |
a64358db | 1338 | struct scsi_device *sdev; |
1da177e4 LT |
1339 | |
1340 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1341 | restart: |
1342 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1343 | if (sdev->channel != starget->channel || |
a64358db | 1344 | sdev->id != starget->id || |
546ae796 | 1345 | scsi_device_get(sdev)) |
1da177e4 LT |
1346 | continue; |
1347 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1348 | scsi_remove_device(sdev); | |
546ae796 | 1349 | scsi_device_put(sdev); |
1da177e4 | 1350 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1351 | goto restart; |
1da177e4 LT |
1352 | } |
1353 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1354 | } |
1355 | ||
1da177e4 LT |
1356 | /** |
1357 | * scsi_remove_target - try to remove a target and all its devices | |
1358 | * @dev: generic starget or parent of generic stargets to be removed | |
1359 | * | |
1360 | * Note: This is slightly racy. It is possible that if the user | |
1361 | * requests the addition of another device then the target won't be | |
1362 | * removed. | |
1363 | */ | |
1364 | void scsi_remove_target(struct device *dev) | |
1365 | { | |
3b661a92 | 1366 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
90a88d6e | 1367 | struct scsi_target *starget, *last_target = NULL; |
3b661a92 DW |
1368 | unsigned long flags; |
1369 | ||
40998193 | 1370 | restart: |
3b661a92 DW |
1371 | spin_lock_irqsave(shost->host_lock, flags); |
1372 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e JB |
1373 | if (starget->state == STARGET_DEL || |
1374 | starget == last_target) | |
3b661a92 DW |
1375 | continue; |
1376 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1377 | kref_get(&starget->reap_ref); |
90a88d6e | 1378 | last_target = starget; |
bc3f02a7 | 1379 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1380 | __scsi_remove_target(starget); |
40998193 CH |
1381 | scsi_target_reap(starget); |
1382 | goto restart; | |
3b661a92 | 1383 | } |
1da177e4 | 1384 | } |
3b661a92 | 1385 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1386 | } |
1387 | EXPORT_SYMBOL(scsi_remove_target); | |
1388 | ||
1389 | int scsi_register_driver(struct device_driver *drv) | |
1390 | { | |
1391 | drv->bus = &scsi_bus_type; | |
1392 | ||
1393 | return driver_register(drv); | |
1394 | } | |
1395 | EXPORT_SYMBOL(scsi_register_driver); | |
1396 | ||
1397 | int scsi_register_interface(struct class_interface *intf) | |
1398 | { | |
1399 | intf->class = &sdev_class; | |
1400 | ||
1401 | return class_interface_register(intf); | |
1402 | } | |
1403 | EXPORT_SYMBOL(scsi_register_interface); | |
1404 | ||
1da177e4 LT |
1405 | /** |
1406 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1407 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1408 | **/ |
1409 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1410 | { | |
1411 | int error, i; | |
1412 | ||
f7120a4f | 1413 | /* add host specific attributes */ |
1da177e4 LT |
1414 | if (shost->hostt->shost_attrs) { |
1415 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1416 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1417 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1418 | if (error) |
1419 | return error; | |
1420 | } | |
1421 | } | |
1422 | ||
1423 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1424 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1425 | return 0; |
1426 | } | |
1427 | ||
bfd12944 KS |
1428 | static struct device_type scsi_dev_type = { |
1429 | .name = "scsi_device", | |
1430 | .release = scsi_device_dev_release, | |
1431 | .groups = scsi_sdev_attr_groups, | |
1432 | }; | |
1433 | ||
1da177e4 LT |
1434 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1435 | { | |
1436 | unsigned long flags; | |
1437 | struct Scsi_Host *shost = sdev->host; | |
1438 | struct scsi_target *starget = sdev->sdev_target; | |
1439 | ||
1440 | device_initialize(&sdev->sdev_gendev); | |
1441 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1442 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1443 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1444 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1445 | ||
ee959b00 | 1446 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1447 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1448 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1449 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1450 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1451 | /* |
1452 | * Get a default scsi_level from the target (derived from sibling | |
1453 | * devices). This is the best we can do for guessing how to set | |
1454 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1455 | * setting doesn't matter, because all the bits are zero anyway. | |
1456 | * But it does matter for higher LUNs. | |
1457 | */ | |
7c9d6f16 | 1458 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1459 | if (sdev->scsi_level <= SCSI_2 && |
1460 | sdev->scsi_level != SCSI_UNKNOWN && | |
1461 | !shost->no_scsi2_lun_in_cdb) | |
1462 | sdev->lun_in_cdb = 1; | |
1463 | ||
1da177e4 LT |
1464 | transport_setup_device(&sdev->sdev_gendev); |
1465 | spin_lock_irqsave(shost->host_lock, flags); | |
1466 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1467 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1468 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1469 | /* |
1470 | * device can now only be removed via __scsi_remove_device() so hold | |
1471 | * the target. Target will be held in CREATED state until something | |
1472 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1473 | */ | |
1474 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1475 | } |
1476 | ||
1477 | int scsi_is_sdev_device(const struct device *dev) | |
1478 | { | |
13ba9bcb | 1479 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1480 | } |
1481 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1482 | ||
1483 | /* A blank transport template that is used in drivers that don't | |
1484 | * yet implement Transport Attributes */ | |
1485 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |