Commit | Line | Data |
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457c8996 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * scsi_sysfs.c | |
4 | * | |
5 | * SCSI sysfs interface routines. | |
6 | * | |
7 | * Created to pull SCSI mid layer sysfs routines into one file. | |
8 | */ | |
9 | ||
1da177e4 | 10 | #include <linux/module.h> |
5a0e3ad6 | 11 | #include <linux/slab.h> |
1da177e4 LT |
12 | #include <linux/init.h> |
13 | #include <linux/blkdev.h> | |
14 | #include <linux/device.h> | |
bc4f2401 | 15 | #include <linux/pm_runtime.h> |
1da177e4 LT |
16 | |
17 | #include <scsi/scsi.h> | |
18 | #include <scsi/scsi_device.h> | |
19 | #include <scsi/scsi_host.h> | |
20 | #include <scsi/scsi_tcq.h> | |
41f95dd2 | 21 | #include <scsi/scsi_dh.h> |
1da177e4 | 22 | #include <scsi/scsi_transport.h> |
44818efb | 23 | #include <scsi/scsi_driver.h> |
345e2960 | 24 | #include <scsi/scsi_devinfo.h> |
1da177e4 LT |
25 | |
26 | #include "scsi_priv.h" | |
27 | #include "scsi_logging.h" | |
28 | ||
b0ed4336 HR |
29 | static struct device_type scsi_dev_type; |
30 | ||
0ad78200 | 31 | static const struct { |
1da177e4 LT |
32 | enum scsi_device_state value; |
33 | char *name; | |
34 | } sdev_states[] = { | |
35 | { SDEV_CREATED, "created" }, | |
36 | { SDEV_RUNNING, "running" }, | |
37 | { SDEV_CANCEL, "cancel" }, | |
38 | { SDEV_DEL, "deleted" }, | |
39 | { SDEV_QUIESCE, "quiesce" }, | |
40 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 41 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 42 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 43 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
44 | }; |
45 | ||
46 | const char *scsi_device_state_name(enum scsi_device_state state) | |
47 | { | |
48 | int i; | |
49 | char *name = NULL; | |
50 | ||
6391a113 | 51 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
52 | if (sdev_states[i].value == state) { |
53 | name = sdev_states[i].name; | |
54 | break; | |
55 | } | |
56 | } | |
57 | return name; | |
58 | } | |
59 | ||
0ad78200 | 60 | static const struct { |
d3301874 MA |
61 | enum scsi_host_state value; |
62 | char *name; | |
63 | } shost_states[] = { | |
64 | { SHOST_CREATED, "created" }, | |
65 | { SHOST_RUNNING, "running" }, | |
66 | { SHOST_CANCEL, "cancel" }, | |
67 | { SHOST_DEL, "deleted" }, | |
68 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
69 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
70 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
71 | }; |
72 | const char *scsi_host_state_name(enum scsi_host_state state) | |
73 | { | |
74 | int i; | |
75 | char *name = NULL; | |
76 | ||
6391a113 | 77 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
78 | if (shost_states[i].value == state) { |
79 | name = shost_states[i].name; | |
80 | break; | |
81 | } | |
82 | } | |
83 | return name; | |
84 | } | |
85 | ||
d78540da | 86 | #ifdef CONFIG_SCSI_DH |
77c9df96 HR |
87 | static const struct { |
88 | unsigned char value; | |
89 | char *name; | |
90 | } sdev_access_states[] = { | |
91 | { SCSI_ACCESS_STATE_OPTIMAL, "active/optimized" }, | |
92 | { SCSI_ACCESS_STATE_ACTIVE, "active/non-optimized" }, | |
93 | { SCSI_ACCESS_STATE_STANDBY, "standby" }, | |
94 | { SCSI_ACCESS_STATE_UNAVAILABLE, "unavailable" }, | |
95 | { SCSI_ACCESS_STATE_LBA, "lba-dependent" }, | |
96 | { SCSI_ACCESS_STATE_OFFLINE, "offline" }, | |
97 | { SCSI_ACCESS_STATE_TRANSITIONING, "transitioning" }, | |
98 | }; | |
99 | ||
d78540da | 100 | static const char *scsi_access_state_name(unsigned char state) |
77c9df96 HR |
101 | { |
102 | int i; | |
103 | char *name = NULL; | |
104 | ||
105 | for (i = 0; i < ARRAY_SIZE(sdev_access_states); i++) { | |
106 | if (sdev_access_states[i].value == state) { | |
107 | name = sdev_access_states[i].name; | |
108 | break; | |
109 | } | |
110 | } | |
111 | return name; | |
112 | } | |
d78540da | 113 | #endif |
77c9df96 | 114 | |
9cb78c16 | 115 | static int check_set(unsigned long long *val, char *src) |
1da177e4 LT |
116 | { |
117 | char *last; | |
118 | ||
3991e460 | 119 | if (strcmp(src, "-") == 0) { |
1da177e4 LT |
120 | *val = SCAN_WILD_CARD; |
121 | } else { | |
122 | /* | |
123 | * Doesn't check for int overflow | |
124 | */ | |
9cb78c16 | 125 | *val = simple_strtoull(src, &last, 0); |
1da177e4 LT |
126 | if (*last != '\0') |
127 | return 1; | |
128 | } | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
133 | { | |
9cb78c16 HR |
134 | char s1[15], s2[15], s3[17], junk; |
135 | unsigned long long channel, id, lun; | |
1da177e4 LT |
136 | int res; |
137 | ||
9cb78c16 | 138 | res = sscanf(str, "%10s %10s %16s %c", s1, s2, s3, &junk); |
1da177e4 LT |
139 | if (res != 3) |
140 | return -EINVAL; | |
141 | if (check_set(&channel, s1)) | |
142 | return -EINVAL; | |
143 | if (check_set(&id, s2)) | |
144 | return -EINVAL; | |
145 | if (check_set(&lun, s3)) | |
146 | return -EINVAL; | |
e02f3f59 CH |
147 | if (shost->transportt->user_scan) |
148 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
149 | else | |
1d645088 HR |
150 | res = scsi_scan_host_selected(shost, channel, id, lun, |
151 | SCSI_SCAN_MANUAL); | |
1da177e4 LT |
152 | return res; |
153 | } | |
154 | ||
155 | /* | |
156 | * shost_show_function: macro to create an attr function that can be used to | |
157 | * show a non-bit field. | |
158 | */ | |
159 | #define shost_show_function(name, field, format_string) \ | |
160 | static ssize_t \ | |
ee959b00 TJ |
161 | show_##name (struct device *dev, struct device_attribute *attr, \ |
162 | char *buf) \ | |
1da177e4 | 163 | { \ |
ee959b00 | 164 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
165 | return snprintf (buf, 20, format_string, shost->field); \ |
166 | } | |
167 | ||
168 | /* | |
169 | * shost_rd_attr: macro to create a function and attribute variable for a | |
170 | * read only field. | |
171 | */ | |
172 | #define shost_rd_attr2(name, field, format_string) \ | |
173 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 174 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
175 | |
176 | #define shost_rd_attr(field, format_string) \ | |
177 | shost_rd_attr2(field, field, format_string) | |
178 | ||
179 | /* | |
180 | * Create the actual show/store functions and data structures. | |
181 | */ | |
182 | ||
ee959b00 TJ |
183 | static ssize_t |
184 | store_scan(struct device *dev, struct device_attribute *attr, | |
185 | const char *buf, size_t count) | |
1da177e4 | 186 | { |
ee959b00 | 187 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
188 | int res; |
189 | ||
190 | res = scsi_scan(shost, buf); | |
191 | if (res == 0) | |
192 | res = count; | |
193 | return res; | |
194 | }; | |
ee959b00 | 195 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 196 | |
d3301874 | 197 | static ssize_t |
ee959b00 TJ |
198 | store_shost_state(struct device *dev, struct device_attribute *attr, |
199 | const char *buf, size_t count) | |
d3301874 MA |
200 | { |
201 | int i; | |
ee959b00 | 202 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
203 | enum scsi_host_state state = 0; |
204 | ||
6391a113 | 205 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
206 | const int len = strlen(shost_states[i].name); |
207 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
208 | buf[len] == '\n') { | |
209 | state = shost_states[i].value; | |
210 | break; | |
211 | } | |
212 | } | |
213 | if (!state) | |
214 | return -EINVAL; | |
215 | ||
216 | if (scsi_host_set_state(shost, state)) | |
217 | return -EINVAL; | |
218 | return count; | |
219 | } | |
220 | ||
221 | static ssize_t | |
ee959b00 | 222 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 223 | { |
ee959b00 | 224 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
225 | const char *name = scsi_host_state_name(shost->shost_state); |
226 | ||
227 | if (!name) | |
228 | return -EINVAL; | |
229 | ||
230 | return snprintf(buf, 20, "%s\n", name); | |
231 | } | |
232 | ||
ee959b00 | 233 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
d78540da | 234 | static struct device_attribute dev_attr_hstate = |
ee959b00 | 235 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); |
d3301874 | 236 | |
5dc2b89e FT |
237 | static ssize_t |
238 | show_shost_mode(unsigned int mode, char *buf) | |
239 | { | |
240 | ssize_t len = 0; | |
241 | ||
242 | if (mode & MODE_INITIATOR) | |
243 | len = sprintf(buf, "%s", "Initiator"); | |
244 | ||
245 | if (mode & MODE_TARGET) | |
246 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
247 | ||
248 | len += sprintf(buf + len, "\n"); | |
249 | ||
250 | return len; | |
251 | } | |
252 | ||
ee959b00 TJ |
253 | static ssize_t |
254 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
255 | char *buf) | |
5dc2b89e | 256 | { |
ee959b00 | 257 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 258 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 259 | |
7a39ac3f JB |
260 | if (supported_mode == MODE_UNKNOWN) |
261 | /* by default this should be initiator */ | |
262 | supported_mode = MODE_INITIATOR; | |
263 | ||
264 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
265 | } |
266 | ||
ee959b00 | 267 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 268 | |
ee959b00 TJ |
269 | static ssize_t |
270 | show_shost_active_mode(struct device *dev, | |
271 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 272 | { |
ee959b00 | 273 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
274 | |
275 | if (shost->active_mode == MODE_UNKNOWN) | |
276 | return snprintf(buf, 20, "unknown\n"); | |
277 | else | |
278 | return show_shost_mode(shost->active_mode, buf); | |
279 | } | |
280 | ||
ee959b00 | 281 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 282 | |
072f19b4 | 283 | static int check_reset_type(const char *str) |
29443691 | 284 | { |
072f19b4 | 285 | if (sysfs_streq(str, "adapter")) |
29443691 | 286 | return SCSI_ADAPTER_RESET; |
072f19b4 | 287 | else if (sysfs_streq(str, "firmware")) |
29443691 VC |
288 | return SCSI_FIRMWARE_RESET; |
289 | else | |
290 | return 0; | |
291 | } | |
292 | ||
293 | static ssize_t | |
294 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
295 | const char *buf, size_t count) | |
296 | { | |
297 | struct Scsi_Host *shost = class_to_shost(dev); | |
298 | struct scsi_host_template *sht = shost->hostt; | |
299 | int ret = -EINVAL; | |
29443691 VC |
300 | int type; |
301 | ||
072f19b4 | 302 | type = check_reset_type(buf); |
29443691 VC |
303 | if (!type) |
304 | goto exit_store_host_reset; | |
305 | ||
306 | if (sht->host_reset) | |
307 | ret = sht->host_reset(shost, type); | |
92227b8d | 308 | else |
309 | ret = -EOPNOTSUPP; | |
29443691 VC |
310 | |
311 | exit_store_host_reset: | |
312 | if (ret == 0) | |
313 | ret = count; | |
314 | return ret; | |
315 | } | |
316 | ||
317 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
318 | ||
b4562022 HR |
319 | static ssize_t |
320 | show_shost_eh_deadline(struct device *dev, | |
321 | struct device_attribute *attr, char *buf) | |
322 | { | |
323 | struct Scsi_Host *shost = class_to_shost(dev); | |
324 | ||
bb3b621a RM |
325 | if (shost->eh_deadline == -1) |
326 | return snprintf(buf, strlen("off") + 2, "off\n"); | |
327 | return sprintf(buf, "%u\n", shost->eh_deadline / HZ); | |
b4562022 HR |
328 | } |
329 | ||
330 | static ssize_t | |
331 | store_shost_eh_deadline(struct device *dev, struct device_attribute *attr, | |
332 | const char *buf, size_t count) | |
333 | { | |
334 | struct Scsi_Host *shost = class_to_shost(dev); | |
335 | int ret = -EINVAL; | |
bb3b621a | 336 | unsigned long deadline, flags; |
b4562022 | 337 | |
ad469a57 HR |
338 | if (shost->transportt && |
339 | (shost->transportt->eh_strategy_handler || | |
340 | !shost->hostt->eh_host_reset_handler)) | |
b4562022 HR |
341 | return ret; |
342 | ||
bb3b621a RM |
343 | if (!strncmp(buf, "off", strlen("off"))) |
344 | deadline = -1; | |
345 | else { | |
346 | ret = kstrtoul(buf, 10, &deadline); | |
347 | if (ret) | |
348 | return ret; | |
349 | if (deadline * HZ > UINT_MAX) | |
350 | return -EINVAL; | |
351 | } | |
352 | ||
353 | spin_lock_irqsave(shost->host_lock, flags); | |
354 | if (scsi_host_in_recovery(shost)) | |
355 | ret = -EBUSY; | |
356 | else { | |
357 | if (deadline == -1) | |
358 | shost->eh_deadline = -1; | |
359 | else | |
b4562022 | 360 | shost->eh_deadline = deadline * HZ; |
bb3b621a RM |
361 | |
362 | ret = count; | |
b4562022 | 363 | } |
bb3b621a RM |
364 | spin_unlock_irqrestore(shost->host_lock, flags); |
365 | ||
b4562022 HR |
366 | return ret; |
367 | } | |
368 | ||
369 | static DEVICE_ATTR(eh_deadline, S_IRUGO | S_IWUSR, show_shost_eh_deadline, store_shost_eh_deadline); | |
370 | ||
1da177e4 | 371 | shost_rd_attr(unique_id, "%u\n"); |
1da177e4 | 372 | shost_rd_attr(cmd_per_lun, "%hd\n"); |
ed632da8 | 373 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 374 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 375 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 376 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
377 | shost_rd_attr(prot_capabilities, "%u\n"); |
378 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
379 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
380 | ||
74665016 CH |
381 | static ssize_t |
382 | show_host_busy(struct device *dev, struct device_attribute *attr, char *buf) | |
383 | { | |
384 | struct Scsi_Host *shost = class_to_shost(dev); | |
c84b023a | 385 | return snprintf(buf, 20, "%d\n", scsi_host_busy(shost)); |
74665016 CH |
386 | } |
387 | static DEVICE_ATTR(host_busy, S_IRUGO, show_host_busy, NULL); | |
388 | ||
f664a3cc JA |
389 | static ssize_t |
390 | show_use_blk_mq(struct device *dev, struct device_attribute *attr, char *buf) | |
391 | { | |
392 | return sprintf(buf, "1\n"); | |
393 | } | |
394 | static DEVICE_ATTR(use_blk_mq, S_IRUGO, show_use_blk_mq, NULL); | |
395 | ||
f7120a4f | 396 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
d285203c | 397 | &dev_attr_use_blk_mq.attr, |
f7120a4f HR |
398 | &dev_attr_unique_id.attr, |
399 | &dev_attr_host_busy.attr, | |
400 | &dev_attr_cmd_per_lun.attr, | |
401 | &dev_attr_can_queue.attr, | |
402 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 403 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
404 | &dev_attr_unchecked_isa_dma.attr, |
405 | &dev_attr_proc_name.attr, | |
406 | &dev_attr_scan.attr, | |
407 | &dev_attr_hstate.attr, | |
408 | &dev_attr_supported_mode.attr, | |
409 | &dev_attr_active_mode.attr, | |
4469f987 MP |
410 | &dev_attr_prot_capabilities.attr, |
411 | &dev_attr_prot_guard_type.attr, | |
29443691 | 412 | &dev_attr_host_reset.attr, |
b4562022 | 413 | &dev_attr_eh_deadline.attr, |
f7120a4f HR |
414 | NULL |
415 | }; | |
416 | ||
d78540da | 417 | static struct attribute_group scsi_shost_attr_group = { |
f7120a4f HR |
418 | .attrs = scsi_sysfs_shost_attrs, |
419 | }; | |
420 | ||
a4dbd674 | 421 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 422 | &scsi_shost_attr_group, |
1da177e4 LT |
423 | NULL |
424 | }; | |
425 | ||
ee959b00 | 426 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
427 | { |
428 | struct scsi_device *sdev; | |
429 | ||
430 | sdev = class_to_sdev(class_dev); | |
431 | put_device(&sdev->sdev_gendev); | |
432 | } | |
433 | ||
65f27f38 | 434 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
435 | { |
436 | struct scsi_device *sdev; | |
437 | struct device *parent; | |
a341cd0f | 438 | struct list_head *this, *tmp; |
ccf1e004 | 439 | struct scsi_vpd *vpd_pg80 = NULL, *vpd_pg83 = NULL; |
1da177e4 LT |
440 | unsigned long flags; |
441 | ||
65f27f38 DH |
442 | sdev = container_of(work, struct scsi_device, ew.work); |
443 | ||
23695e41 JN |
444 | scsi_dh_release_device(sdev); |
445 | ||
65f27f38 | 446 | parent = sdev->sdev_gendev.parent; |
1da177e4 LT |
447 | |
448 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
1da177e4 LT |
449 | list_del(&sdev->siblings); |
450 | list_del(&sdev->same_target_siblings); | |
451 | list_del(&sdev->starved_entry); | |
452 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
453 | ||
a341cd0f JG |
454 | cancel_work_sync(&sdev->event_work); |
455 | ||
456 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
457 | struct scsi_event *evt; | |
458 | ||
459 | evt = list_entry(this, struct scsi_event, node); | |
460 | list_del(&evt->node); | |
461 | kfree(evt); | |
462 | } | |
463 | ||
e73e079b | 464 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
465 | /* NULL queue means the device can't be used */ |
466 | sdev->request_queue = NULL; | |
1da177e4 | 467 | |
ccf1e004 BVA |
468 | mutex_lock(&sdev->inquiry_mutex); |
469 | rcu_swap_protected(sdev->vpd_pg80, vpd_pg80, | |
470 | lockdep_is_held(&sdev->inquiry_mutex)); | |
471 | rcu_swap_protected(sdev->vpd_pg83, vpd_pg83, | |
472 | lockdep_is_held(&sdev->inquiry_mutex)); | |
473 | mutex_unlock(&sdev->inquiry_mutex); | |
474 | ||
475 | if (vpd_pg83) | |
476 | kfree_rcu(vpd_pg83, rcu); | |
477 | if (vpd_pg80) | |
478 | kfree_rcu(vpd_pg80, rcu); | |
1da177e4 LT |
479 | kfree(sdev->inquiry); |
480 | kfree(sdev); | |
481 | ||
482 | if (parent) | |
483 | put_device(parent); | |
484 | } | |
485 | ||
65110b21 JB |
486 | static void scsi_device_dev_release(struct device *dev) |
487 | { | |
ffedb452 | 488 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 489 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 490 | &sdp->ew); |
65110b21 JB |
491 | } |
492 | ||
52c1da39 | 493 | static struct class sdev_class = { |
1da177e4 | 494 | .name = "scsi_device", |
ee959b00 | 495 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
496 | }; |
497 | ||
498 | /* all probing is done in the individual ->probe routines */ | |
499 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
500 | { | |
b0ed4336 HR |
501 | struct scsi_device *sdp; |
502 | ||
503 | if (dev->type != &scsi_dev_type) | |
504 | return 0; | |
505 | ||
506 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
507 | if (sdp->no_uld_attach) |
508 | return 0; | |
509 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
510 | } | |
511 | ||
7eff2e7a | 512 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 513 | { |
1f42ea7b JB |
514 | struct scsi_device *sdev; |
515 | ||
516 | if (dev->type != &scsi_dev_type) | |
517 | return 0; | |
518 | ||
519 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 520 | |
7eff2e7a | 521 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
522 | return 0; |
523 | } | |
524 | ||
1da177e4 LT |
525 | struct bus_type scsi_bus_type = { |
526 | .name = "scsi", | |
527 | .match = scsi_bus_match, | |
d7b8bcb0 | 528 | .uevent = scsi_bus_uevent, |
aa338601 | 529 | #ifdef CONFIG_PM |
db5bd1e0 | 530 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 531 | #endif |
1da177e4 | 532 | }; |
a6a8d9f8 | 533 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
534 | |
535 | int scsi_sysfs_register(void) | |
536 | { | |
537 | int error; | |
538 | ||
539 | error = bus_register(&scsi_bus_type); | |
540 | if (!error) { | |
541 | error = class_register(&sdev_class); | |
542 | if (error) | |
543 | bus_unregister(&scsi_bus_type); | |
544 | } | |
545 | ||
546 | return error; | |
547 | } | |
548 | ||
549 | void scsi_sysfs_unregister(void) | |
550 | { | |
551 | class_unregister(&sdev_class); | |
552 | bus_unregister(&scsi_bus_type); | |
553 | } | |
554 | ||
555 | /* | |
556 | * sdev_show_function: macro to create an attr function that can be used to | |
557 | * show a non-bit field. | |
558 | */ | |
559 | #define sdev_show_function(field, format_string) \ | |
560 | static ssize_t \ | |
ee959b00 TJ |
561 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
562 | char *buf) \ | |
1da177e4 LT |
563 | { \ |
564 | struct scsi_device *sdev; \ | |
565 | sdev = to_scsi_device(dev); \ | |
566 | return snprintf (buf, 20, format_string, sdev->field); \ | |
567 | } \ | |
568 | ||
569 | /* | |
570 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
571 | * read only field. | |
572 | */ | |
573 | #define sdev_rd_attr(field, format_string) \ | |
574 | sdev_show_function(field, format_string) \ | |
575 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
576 | ||
577 | ||
578 | /* | |
160e7f67 | 579 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
580 | * read/write field. |
581 | */ | |
582 | #define sdev_rw_attr(field, format_string) \ | |
583 | sdev_show_function(field, format_string) \ | |
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 | struct scsi_device *sdev; \ | |
590 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 591 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
592 | return count; \ |
593 | } \ | |
594 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
595 | ||
596 | /* Currently we don't export bit fields, but we might in future, | |
597 | * so leave this code in */ | |
598 | #if 0 | |
599 | /* | |
600 | * sdev_rd_attr: create a function and attribute variable for a | |
601 | * read/write bit field. | |
602 | */ | |
603 | #define sdev_rw_attr_bit(field) \ | |
604 | sdev_show_function(field, "%d\n") \ | |
605 | \ | |
606 | static ssize_t \ | |
ee959b00 TJ |
607 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
608 | const char *buf, size_t count) \ | |
1da177e4 LT |
609 | { \ |
610 | int ret; \ | |
611 | struct scsi_device *sdev; \ | |
612 | ret = scsi_sdev_check_buf_bit(buf); \ | |
613 | if (ret >= 0) { \ | |
614 | sdev = to_scsi_device(dev); \ | |
615 | sdev->field = ret; \ | |
616 | ret = count; \ | |
617 | } \ | |
618 | return ret; \ | |
619 | } \ | |
620 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
621 | ||
622 | /* | |
623 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
624 | * else return -EINVAL. | |
625 | */ | |
626 | static int scsi_sdev_check_buf_bit(const char *buf) | |
627 | { | |
628 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
629 | if (buf[0] == '1') | |
630 | return 1; | |
631 | else if (buf[0] == '0') | |
632 | return 0; | |
633 | else | |
634 | return -EINVAL; | |
635 | } else | |
636 | return -EINVAL; | |
637 | } | |
638 | #endif | |
639 | /* | |
640 | * Create the actual show/store functions and data structures. | |
641 | */ | |
1da177e4 LT |
642 | sdev_rd_attr (type, "%d\n"); |
643 | sdev_rd_attr (scsi_level, "%d\n"); | |
644 | sdev_rd_attr (vendor, "%.8s\n"); | |
645 | sdev_rd_attr (model, "%.16s\n"); | |
646 | sdev_rd_attr (rev, "%.4s\n"); | |
647 | ||
71e75c97 CH |
648 | static ssize_t |
649 | sdev_show_device_busy(struct device *dev, struct device_attribute *attr, | |
650 | char *buf) | |
651 | { | |
652 | struct scsi_device *sdev = to_scsi_device(dev); | |
653 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_busy)); | |
654 | } | |
655 | static DEVICE_ATTR(device_busy, S_IRUGO, sdev_show_device_busy, NULL); | |
656 | ||
cd9070c9 CH |
657 | static ssize_t |
658 | sdev_show_device_blocked(struct device *dev, struct device_attribute *attr, | |
659 | char *buf) | |
660 | { | |
661 | struct scsi_device *sdev = to_scsi_device(dev); | |
662 | return snprintf(buf, 20, "%d\n", atomic_read(&sdev->device_blocked)); | |
663 | } | |
664 | static DEVICE_ATTR(device_blocked, S_IRUGO, sdev_show_device_blocked, NULL); | |
665 | ||
242f9dcb JA |
666 | /* |
667 | * TODO: can we make these symlinks to the block layer ones? | |
668 | */ | |
1da177e4 | 669 | static ssize_t |
10523b3b | 670 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
671 | { |
672 | struct scsi_device *sdev; | |
673 | sdev = to_scsi_device(dev); | |
242f9dcb | 674 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
675 | } |
676 | ||
677 | static ssize_t | |
ee959b00 TJ |
678 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
679 | const char *buf, size_t count) | |
1da177e4 LT |
680 | { |
681 | struct scsi_device *sdev; | |
682 | int timeout; | |
683 | sdev = to_scsi_device(dev); | |
684 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 685 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
686 | return count; |
687 | } | |
688 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
689 | ||
0816c925 MP |
690 | static ssize_t |
691 | sdev_show_eh_timeout(struct device *dev, struct device_attribute *attr, char *buf) | |
692 | { | |
693 | struct scsi_device *sdev; | |
694 | sdev = to_scsi_device(dev); | |
695 | return snprintf(buf, 20, "%u\n", sdev->eh_timeout / HZ); | |
696 | } | |
697 | ||
698 | static ssize_t | |
699 | sdev_store_eh_timeout(struct device *dev, struct device_attribute *attr, | |
700 | const char *buf, size_t count) | |
701 | { | |
702 | struct scsi_device *sdev; | |
703 | unsigned int eh_timeout; | |
704 | int err; | |
705 | ||
706 | if (!capable(CAP_SYS_ADMIN)) | |
707 | return -EACCES; | |
708 | ||
709 | sdev = to_scsi_device(dev); | |
710 | err = kstrtouint(buf, 10, &eh_timeout); | |
711 | if (err) | |
712 | return err; | |
713 | sdev->eh_timeout = eh_timeout * HZ; | |
714 | ||
715 | return count; | |
716 | } | |
717 | static DEVICE_ATTR(eh_timeout, S_IRUGO | S_IWUSR, sdev_show_eh_timeout, sdev_store_eh_timeout); | |
718 | ||
1da177e4 | 719 | static ssize_t |
ee959b00 TJ |
720 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
721 | const char *buf, size_t count) | |
1da177e4 LT |
722 | { |
723 | scsi_rescan_device(dev); | |
724 | return count; | |
725 | } | |
726 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
727 | ||
ee959b00 TJ |
728 | static ssize_t |
729 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
730 | const char *buf, size_t count) | |
1da177e4 | 731 | { |
0ee223b2 BVA |
732 | struct kernfs_node *kn; |
733 | ||
734 | kn = sysfs_break_active_protection(&dev->kobj, &attr->attr); | |
735 | WARN_ON_ONCE(!kn); | |
736 | /* | |
737 | * Concurrent writes into the "delete" sysfs attribute may trigger | |
738 | * concurrent calls to device_remove_file() and scsi_remove_device(). | |
739 | * device_remove_file() handles concurrent removal calls by | |
740 | * serializing these and by ignoring the second and later removal | |
741 | * attempts. Concurrent calls of scsi_remove_device() are | |
742 | * serialized. The second and later calls of scsi_remove_device() are | |
743 | * ignored because the first call of that function changes the device | |
744 | * state into SDEV_DEL. | |
745 | */ | |
746 | device_remove_file(dev, attr); | |
747 | scsi_remove_device(to_scsi_device(dev)); | |
748 | if (kn) | |
749 | sysfs_unbreak_active_protection(kn); | |
1da177e4 LT |
750 | return count; |
751 | }; | |
752 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
753 | ||
754 | static ssize_t | |
ee959b00 TJ |
755 | store_state_field(struct device *dev, struct device_attribute *attr, |
756 | const char *buf, size_t count) | |
1da177e4 | 757 | { |
0db6ca8a | 758 | int i, ret; |
1da177e4 LT |
759 | struct scsi_device *sdev = to_scsi_device(dev); |
760 | enum scsi_device_state state = 0; | |
761 | ||
6391a113 | 762 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
763 | const int len = strlen(sdev_states[i].name); |
764 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
765 | buf[len] == '\n') { | |
766 | state = sdev_states[i].value; | |
767 | break; | |
768 | } | |
769 | } | |
770 | if (!state) | |
771 | return -EINVAL; | |
772 | ||
0db6ca8a BVA |
773 | mutex_lock(&sdev->state_mutex); |
774 | ret = scsi_device_set_state(sdev, state); | |
70fc085c | 775 | /* |
776 | * If the device state changes to SDEV_RUNNING, we need to run | |
777 | * the queue to avoid I/O hang. | |
778 | */ | |
779 | if (ret == 0 && state == SDEV_RUNNING) | |
780 | blk_mq_run_hw_queues(sdev->request_queue, true); | |
0db6ca8a BVA |
781 | mutex_unlock(&sdev->state_mutex); |
782 | ||
783 | return ret == 0 ? count : -EINVAL; | |
1da177e4 LT |
784 | } |
785 | ||
786 | static ssize_t | |
10523b3b | 787 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
788 | { |
789 | struct scsi_device *sdev = to_scsi_device(dev); | |
790 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
791 | ||
792 | if (!name) | |
793 | return -EINVAL; | |
794 | ||
795 | return snprintf(buf, 20, "%s\n", name); | |
796 | } | |
797 | ||
798 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
799 | ||
800 | static ssize_t | |
ee959b00 TJ |
801 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
802 | char *buf) | |
1da177e4 LT |
803 | { |
804 | struct scsi_device *sdev = to_scsi_device(dev); | |
805 | const char *name = "none"; | |
806 | ||
609aa22f | 807 | if (sdev->simple_tags) |
1da177e4 LT |
808 | name = "simple"; |
809 | ||
810 | return snprintf(buf, 20, "%s\n", name); | |
811 | } | |
812 | ||
276b20d0 HR |
813 | static ssize_t |
814 | store_queue_type_field(struct device *dev, struct device_attribute *attr, | |
815 | const char *buf, size_t count) | |
816 | { | |
817 | struct scsi_device *sdev = to_scsi_device(dev); | |
276b20d0 | 818 | |
efc3c1df | 819 | if (!sdev->tagged_supported) |
276b20d0 | 820 | return -EINVAL; |
efc3c1df CH |
821 | |
822 | sdev_printk(KERN_INFO, sdev, | |
823 | "ignoring write to deprecated queue_type attribute"); | |
276b20d0 HR |
824 | return count; |
825 | } | |
826 | ||
827 | static DEVICE_ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
828 | store_queue_type_field); | |
1da177e4 | 829 | |
b3ae8780 HR |
830 | #define sdev_vpd_pg_attr(_page) \ |
831 | static ssize_t \ | |
832 | show_vpd_##_page(struct file *filp, struct kobject *kobj, \ | |
833 | struct bin_attribute *bin_attr, \ | |
834 | char *buf, loff_t off, size_t count) \ | |
835 | { \ | |
836 | struct device *dev = container_of(kobj, struct device, kobj); \ | |
837 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
ccf1e004 BVA |
838 | struct scsi_vpd *vpd_page; \ |
839 | int ret = -EINVAL; \ | |
840 | \ | |
09e2b0b1 | 841 | rcu_read_lock(); \ |
ccf1e004 BVA |
842 | vpd_page = rcu_dereference(sdev->vpd_##_page); \ |
843 | if (vpd_page) \ | |
844 | ret = memory_read_from_buffer(buf, count, &off, \ | |
845 | vpd_page->data, vpd_page->len); \ | |
09e2b0b1 | 846 | rcu_read_unlock(); \ |
ccf1e004 | 847 | return ret; \ |
b3ae8780 HR |
848 | } \ |
849 | static struct bin_attribute dev_attr_vpd_##_page = { \ | |
850 | .attr = {.name = __stringify(vpd_##_page), .mode = S_IRUGO }, \ | |
851 | .size = 0, \ | |
852 | .read = show_vpd_##_page, \ | |
853 | }; | |
854 | ||
855 | sdev_vpd_pg_attr(pg83); | |
856 | sdev_vpd_pg_attr(pg80); | |
1da177e4 | 857 | |
92e6246c JT |
858 | static ssize_t show_inquiry(struct file *filep, struct kobject *kobj, |
859 | struct bin_attribute *bin_attr, | |
860 | char *buf, loff_t off, size_t count) | |
861 | { | |
862 | struct device *dev = container_of(kobj, struct device, kobj); | |
863 | struct scsi_device *sdev = to_scsi_device(dev); | |
864 | ||
865 | if (!sdev->inquiry) | |
866 | return -EINVAL; | |
867 | ||
868 | return memory_read_from_buffer(buf, count, &off, sdev->inquiry, | |
869 | sdev->inquiry_len); | |
870 | } | |
871 | ||
872 | static struct bin_attribute dev_attr_inquiry = { | |
873 | .attr = { | |
874 | .name = "inquiry", | |
875 | .mode = S_IRUGO, | |
876 | }, | |
877 | .size = 0, | |
878 | .read = show_inquiry, | |
879 | }; | |
880 | ||
1da177e4 | 881 | static ssize_t |
b3ae8780 HR |
882 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, |
883 | char *buf) | |
1da177e4 LT |
884 | { |
885 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
886 | } | |
887 | ||
888 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
889 | ||
890 | #define show_sdev_iostat(field) \ | |
891 | static ssize_t \ | |
ee959b00 TJ |
892 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
893 | char *buf) \ | |
1da177e4 LT |
894 | { \ |
895 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
896 | unsigned long long count = atomic_read(&sdev->field); \ | |
897 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
898 | } \ | |
899 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
900 | ||
901 | show_sdev_iostat(iorequest_cnt); | |
902 | show_sdev_iostat(iodone_cnt); | |
903 | show_sdev_iostat(ioerr_cnt); | |
904 | ||
d7b8bcb0 MT |
905 | static ssize_t |
906 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
907 | { | |
908 | struct scsi_device *sdev; | |
909 | sdev = to_scsi_device(dev); | |
910 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
911 | } | |
912 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 913 | |
a341cd0f JG |
914 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
915 | static ssize_t \ | |
916 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 917 | char *buf) \ |
a341cd0f JG |
918 | { \ |
919 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
920 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
921 | return snprintf(buf, 20, "%d\n", val); \ | |
922 | } | |
923 | ||
924 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
925 | static ssize_t \ | |
ee959b00 | 926 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
927 | const char *buf, size_t count) \ |
928 | { \ | |
929 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
930 | int val = simple_strtoul(buf, NULL, 0); \ | |
931 | if (val == 0) \ | |
932 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
933 | else if (val == 1) \ | |
934 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
935 | else \ | |
936 | return -EINVAL; \ | |
937 | return count; \ | |
938 | } | |
939 | ||
940 | #define DECLARE_EVT(name, Cap_name) \ | |
941 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
942 | DECLARE_EVT_STORE(name, Cap_name) \ | |
943 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
944 | sdev_store_evt_##name); | |
945 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
946 | ||
947 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
279afdfe EM |
948 | DECLARE_EVT(inquiry_change_reported, INQUIRY_CHANGE_REPORTED) |
949 | DECLARE_EVT(capacity_change_reported, CAPACITY_CHANGE_REPORTED) | |
950 | DECLARE_EVT(soft_threshold_reached, SOFT_THRESHOLD_REACHED_REPORTED) | |
951 | DECLARE_EVT(mode_parameter_change_reported, MODE_PARAMETER_CHANGE_REPORTED) | |
952 | DECLARE_EVT(lun_change_reported, LUN_CHANGE_REPORTED) | |
a341cd0f | 953 | |
ee959b00 | 954 | static ssize_t |
276b20d0 HR |
955 | sdev_store_queue_depth(struct device *dev, struct device_attribute *attr, |
956 | const char *buf, size_t count) | |
1da177e4 LT |
957 | { |
958 | int depth, retval; | |
959 | struct scsi_device *sdev = to_scsi_device(dev); | |
960 | struct scsi_host_template *sht = sdev->host->hostt; | |
961 | ||
962 | if (!sht->change_queue_depth) | |
963 | return -EINVAL; | |
964 | ||
965 | depth = simple_strtoul(buf, NULL, 0); | |
966 | ||
1278dd68 | 967 | if (depth < 1 || depth > sdev->host->can_queue) |
1da177e4 LT |
968 | return -EINVAL; |
969 | ||
db5ed4df | 970 | retval = sht->change_queue_depth(sdev, depth); |
1da177e4 LT |
971 | if (retval < 0) |
972 | return retval; | |
973 | ||
4a84067d VD |
974 | sdev->max_queue_depth = sdev->queue_depth; |
975 | ||
1da177e4 LT |
976 | return count; |
977 | } | |
276b20d0 | 978 | sdev_show_function(queue_depth, "%d\n"); |
1da177e4 | 979 | |
276b20d0 HR |
980 | static DEVICE_ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, |
981 | sdev_store_queue_depth); | |
1da177e4 | 982 | |
248d4fe9 HR |
983 | static ssize_t |
984 | sdev_show_wwid(struct device *dev, struct device_attribute *attr, | |
985 | char *buf) | |
986 | { | |
987 | struct scsi_device *sdev = to_scsi_device(dev); | |
988 | ssize_t count; | |
989 | ||
990 | count = scsi_vpd_lun_id(sdev, buf, PAGE_SIZE); | |
991 | if (count > 0) { | |
992 | buf[count] = '\n'; | |
993 | count++; | |
994 | } | |
995 | return count; | |
996 | } | |
997 | static DEVICE_ATTR(wwid, S_IRUGO, sdev_show_wwid, NULL); | |
998 | ||
093b8886 | 999 | #define BLIST_FLAG_NAME(name) \ |
14098803 | 1000 | [const_ilog2((__force __u64)BLIST_##name)] = #name |
345e2960 HR |
1001 | static const char *const sdev_bflags_name[] = { |
1002 | #include "scsi_devinfo_tbl.c" | |
1003 | }; | |
1004 | #undef BLIST_FLAG_NAME | |
1005 | ||
1006 | static ssize_t | |
1007 | sdev_show_blacklist(struct device *dev, struct device_attribute *attr, | |
1008 | char *buf) | |
1009 | { | |
1010 | struct scsi_device *sdev = to_scsi_device(dev); | |
1011 | int i; | |
1012 | ssize_t len = 0; | |
1013 | ||
1014 | for (i = 0; i < sizeof(sdev->sdev_bflags) * BITS_PER_BYTE; i++) { | |
1015 | const char *name = NULL; | |
1016 | ||
093b8886 | 1017 | if (!(sdev->sdev_bflags & (__force blist_flags_t)BIT(i))) |
345e2960 HR |
1018 | continue; |
1019 | if (i < ARRAY_SIZE(sdev_bflags_name) && sdev_bflags_name[i]) | |
1020 | name = sdev_bflags_name[i]; | |
1021 | ||
1022 | if (name) | |
1023 | len += snprintf(buf + len, PAGE_SIZE - len, | |
1024 | "%s%s", len ? " " : "", name); | |
1025 | else | |
1026 | len += snprintf(buf + len, PAGE_SIZE - len, | |
1027 | "%sINVALID_BIT(%d)", len ? " " : "", i); | |
1028 | } | |
1029 | if (len) | |
1030 | len += snprintf(buf + len, PAGE_SIZE - len, "\n"); | |
1031 | return len; | |
1032 | } | |
1033 | static DEVICE_ATTR(blacklist, S_IRUGO, sdev_show_blacklist, NULL); | |
1034 | ||
41f95dd2 HR |
1035 | #ifdef CONFIG_SCSI_DH |
1036 | static ssize_t | |
1037 | sdev_show_dh_state(struct device *dev, struct device_attribute *attr, | |
1038 | char *buf) | |
1039 | { | |
1040 | struct scsi_device *sdev = to_scsi_device(dev); | |
1041 | ||
1042 | if (!sdev->handler) | |
1043 | return snprintf(buf, 20, "detached\n"); | |
1044 | ||
1045 | return snprintf(buf, 20, "%s\n", sdev->handler->name); | |
1046 | } | |
1047 | ||
1048 | static ssize_t | |
1049 | sdev_store_dh_state(struct device *dev, struct device_attribute *attr, | |
1050 | const char *buf, size_t count) | |
1051 | { | |
1052 | struct scsi_device *sdev = to_scsi_device(dev); | |
1053 | int err = -EINVAL; | |
1054 | ||
1055 | if (sdev->sdev_state == SDEV_CANCEL || | |
1056 | sdev->sdev_state == SDEV_DEL) | |
1057 | return -ENODEV; | |
1058 | ||
1059 | if (!sdev->handler) { | |
1060 | /* | |
1061 | * Attach to a device handler | |
1062 | */ | |
1063 | err = scsi_dh_attach(sdev->request_queue, buf); | |
1064 | } else if (!strncmp(buf, "activate", 8)) { | |
1065 | /* | |
1066 | * Activate a device handler | |
1067 | */ | |
1068 | if (sdev->handler->activate) | |
1069 | err = sdev->handler->activate(sdev, NULL, NULL); | |
1070 | else | |
1071 | err = 0; | |
1072 | } else if (!strncmp(buf, "detach", 6)) { | |
1073 | /* | |
1074 | * Detach from a device handler | |
1075 | */ | |
1076 | sdev_printk(KERN_WARNING, sdev, | |
1077 | "can't detach handler %s.\n", | |
1078 | sdev->handler->name); | |
1079 | err = -EINVAL; | |
1080 | } | |
1081 | ||
1082 | return err < 0 ? err : count; | |
1083 | } | |
1084 | ||
1085 | static DEVICE_ATTR(dh_state, S_IRUGO | S_IWUSR, sdev_show_dh_state, | |
1086 | sdev_store_dh_state); | |
77c9df96 HR |
1087 | |
1088 | static ssize_t | |
1089 | sdev_show_access_state(struct device *dev, | |
1090 | struct device_attribute *attr, | |
1091 | char *buf) | |
1092 | { | |
1093 | struct scsi_device *sdev = to_scsi_device(dev); | |
1094 | unsigned char access_state; | |
1095 | const char *access_state_name; | |
1096 | ||
1097 | if (!sdev->handler) | |
1098 | return -EINVAL; | |
1099 | ||
1100 | access_state = (sdev->access_state & SCSI_ACCESS_STATE_MASK); | |
1101 | access_state_name = scsi_access_state_name(access_state); | |
1102 | ||
1103 | return sprintf(buf, "%s\n", | |
1104 | access_state_name ? access_state_name : "unknown"); | |
1105 | } | |
1106 | static DEVICE_ATTR(access_state, S_IRUGO, sdev_show_access_state, NULL); | |
1107 | ||
1108 | static ssize_t | |
1109 | sdev_show_preferred_path(struct device *dev, | |
1110 | struct device_attribute *attr, | |
1111 | char *buf) | |
1112 | { | |
1113 | struct scsi_device *sdev = to_scsi_device(dev); | |
1114 | ||
1115 | if (!sdev->handler) | |
1116 | return -EINVAL; | |
1117 | ||
1118 | if (sdev->access_state & SCSI_ACCESS_STATE_PREFERRED) | |
1119 | return sprintf(buf, "1\n"); | |
1120 | else | |
1121 | return sprintf(buf, "0\n"); | |
1122 | } | |
1123 | static DEVICE_ATTR(preferred_path, S_IRUGO, sdev_show_preferred_path, NULL); | |
41f95dd2 HR |
1124 | #endif |
1125 | ||
4a84067d VD |
1126 | static ssize_t |
1127 | sdev_show_queue_ramp_up_period(struct device *dev, | |
1128 | struct device_attribute *attr, | |
1129 | char *buf) | |
1130 | { | |
1131 | struct scsi_device *sdev; | |
1132 | sdev = to_scsi_device(dev); | |
1133 | return snprintf(buf, 20, "%u\n", | |
1134 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
1135 | } | |
1136 | ||
1137 | static ssize_t | |
1138 | sdev_store_queue_ramp_up_period(struct device *dev, | |
1139 | struct device_attribute *attr, | |
1140 | const char *buf, size_t count) | |
1141 | { | |
1142 | struct scsi_device *sdev = to_scsi_device(dev); | |
f7c65af5 | 1143 | unsigned int period; |
4a84067d | 1144 | |
f7c65af5 | 1145 | if (kstrtouint(buf, 10, &period)) |
4a84067d VD |
1146 | return -EINVAL; |
1147 | ||
1148 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
5cb9b40d | 1149 | return count; |
4a84067d VD |
1150 | } |
1151 | ||
276b20d0 HR |
1152 | static DEVICE_ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, |
1153 | sdev_show_queue_ramp_up_period, | |
1154 | sdev_store_queue_ramp_up_period); | |
4a84067d | 1155 | |
276b20d0 HR |
1156 | static umode_t scsi_sdev_attr_is_visible(struct kobject *kobj, |
1157 | struct attribute *attr, int i) | |
1da177e4 | 1158 | { |
276b20d0 | 1159 | struct device *dev = container_of(kobj, struct device, kobj); |
1da177e4 | 1160 | struct scsi_device *sdev = to_scsi_device(dev); |
1da177e4 | 1161 | |
1da177e4 | 1162 | |
276b20d0 HR |
1163 | if (attr == &dev_attr_queue_depth.attr && |
1164 | !sdev->host->hostt->change_queue_depth) | |
1165 | return S_IRUGO; | |
1da177e4 | 1166 | |
276b20d0 HR |
1167 | if (attr == &dev_attr_queue_ramp_up_period.attr && |
1168 | !sdev->host->hostt->change_queue_depth) | |
1169 | return 0; | |
1da177e4 | 1170 | |
77c9df96 HR |
1171 | #ifdef CONFIG_SCSI_DH |
1172 | if (attr == &dev_attr_access_state.attr && | |
1173 | !sdev->handler) | |
1174 | return 0; | |
1175 | if (attr == &dev_attr_preferred_path.attr && | |
1176 | !sdev->handler) | |
1177 | return 0; | |
1178 | #endif | |
276b20d0 | 1179 | return attr->mode; |
1da177e4 LT |
1180 | } |
1181 | ||
7e47976b HR |
1182 | static umode_t scsi_sdev_bin_attr_is_visible(struct kobject *kobj, |
1183 | struct bin_attribute *attr, int i) | |
1184 | { | |
1185 | struct device *dev = container_of(kobj, struct device, kobj); | |
1186 | struct scsi_device *sdev = to_scsi_device(dev); | |
1187 | ||
1188 | ||
1189 | if (attr == &dev_attr_vpd_pg80 && !sdev->vpd_pg80) | |
1190 | return 0; | |
1191 | ||
68887582 | 1192 | if (attr == &dev_attr_vpd_pg83 && !sdev->vpd_pg83) |
7e47976b HR |
1193 | return 0; |
1194 | ||
1195 | return S_IRUGO; | |
1196 | } | |
1197 | ||
276b20d0 HR |
1198 | /* Default template for device attributes. May NOT be modified */ |
1199 | static struct attribute *scsi_sdev_attrs[] = { | |
1200 | &dev_attr_device_blocked.attr, | |
1201 | &dev_attr_type.attr, | |
1202 | &dev_attr_scsi_level.attr, | |
1203 | &dev_attr_device_busy.attr, | |
1204 | &dev_attr_vendor.attr, | |
1205 | &dev_attr_model.attr, | |
1206 | &dev_attr_rev.attr, | |
1207 | &dev_attr_rescan.attr, | |
1208 | &dev_attr_delete.attr, | |
1209 | &dev_attr_state.attr, | |
1210 | &dev_attr_timeout.attr, | |
1211 | &dev_attr_eh_timeout.attr, | |
1212 | &dev_attr_iocounterbits.attr, | |
1213 | &dev_attr_iorequest_cnt.attr, | |
1214 | &dev_attr_iodone_cnt.attr, | |
1215 | &dev_attr_ioerr_cnt.attr, | |
1216 | &dev_attr_modalias.attr, | |
1217 | &dev_attr_queue_depth.attr, | |
1218 | &dev_attr_queue_type.attr, | |
248d4fe9 | 1219 | &dev_attr_wwid.attr, |
345e2960 | 1220 | &dev_attr_blacklist.attr, |
41f95dd2 HR |
1221 | #ifdef CONFIG_SCSI_DH |
1222 | &dev_attr_dh_state.attr, | |
77c9df96 HR |
1223 | &dev_attr_access_state.attr, |
1224 | &dev_attr_preferred_path.attr, | |
41f95dd2 | 1225 | #endif |
276b20d0 HR |
1226 | &dev_attr_queue_ramp_up_period.attr, |
1227 | REF_EVT(media_change), | |
1228 | REF_EVT(inquiry_change_reported), | |
1229 | REF_EVT(capacity_change_reported), | |
1230 | REF_EVT(soft_threshold_reached), | |
1231 | REF_EVT(mode_parameter_change_reported), | |
1232 | REF_EVT(lun_change_reported), | |
1233 | NULL | |
1234 | }; | |
1235 | ||
b3ae8780 HR |
1236 | static struct bin_attribute *scsi_sdev_bin_attrs[] = { |
1237 | &dev_attr_vpd_pg83, | |
1238 | &dev_attr_vpd_pg80, | |
92e6246c | 1239 | &dev_attr_inquiry, |
b3ae8780 HR |
1240 | NULL |
1241 | }; | |
276b20d0 HR |
1242 | static struct attribute_group scsi_sdev_attr_group = { |
1243 | .attrs = scsi_sdev_attrs, | |
b3ae8780 | 1244 | .bin_attrs = scsi_sdev_bin_attrs, |
276b20d0 | 1245 | .is_visible = scsi_sdev_attr_is_visible, |
7e47976b | 1246 | .is_bin_visible = scsi_sdev_bin_attr_is_visible, |
276b20d0 HR |
1247 | }; |
1248 | ||
1249 | static const struct attribute_group *scsi_sdev_attr_groups[] = { | |
1250 | &scsi_sdev_attr_group, | |
1251 | NULL | |
1252 | }; | |
1253 | ||
643eb2d9 JB |
1254 | static int scsi_target_add(struct scsi_target *starget) |
1255 | { | |
1256 | int error; | |
1257 | ||
1258 | if (starget->state != STARGET_CREATED) | |
1259 | return 0; | |
1260 | ||
1261 | error = device_add(&starget->dev); | |
1262 | if (error) { | |
1263 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
1264 | return error; |
1265 | } | |
1266 | transport_add_device(&starget->dev); | |
1267 | starget->state = STARGET_RUNNING; | |
1268 | ||
bc4f2401 AS |
1269 | pm_runtime_set_active(&starget->dev); |
1270 | pm_runtime_enable(&starget->dev); | |
1271 | device_enable_async_suspend(&starget->dev); | |
1272 | ||
643eb2d9 JB |
1273 | return 0; |
1274 | } | |
1275 | ||
1da177e4 LT |
1276 | /** |
1277 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
1278 | * @sdev: scsi_device to add | |
1279 | * | |
1280 | * Return value: | |
1281 | * 0 on Success / non-zero on Failure | |
1282 | **/ | |
1283 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
1284 | { | |
1285 | int error, i; | |
80ed71ce | 1286 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 1287 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 1288 | |
643eb2d9 JB |
1289 | error = scsi_target_add(starget); |
1290 | if (error) | |
1291 | return error; | |
1292 | ||
1293 | transport_configure_device(&starget->dev); | |
bc4f2401 | 1294 | |
4cb077d9 | 1295 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
1296 | scsi_autopm_get_target(starget); |
1297 | pm_runtime_set_active(&sdev->sdev_gendev); | |
1298 | pm_runtime_forbid(&sdev->sdev_gendev); | |
1299 | pm_runtime_enable(&sdev->sdev_gendev); | |
1300 | scsi_autopm_put_target(starget); | |
1301 | ||
bc4f2401 AS |
1302 | scsi_autopm_get_device(sdev); |
1303 | ||
2930f817 | 1304 | scsi_dh_add_device(sdev); |
086b91d0 | 1305 | |
4cd2459c HR |
1306 | error = device_add(&sdev->sdev_gendev); |
1307 | if (error) { | |
1308 | sdev_printk(KERN_INFO, sdev, | |
1309 | "failed to add device: %d\n", error); | |
4cd2459c HR |
1310 | return error; |
1311 | } | |
1312 | ||
4cb077d9 | 1313 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 1314 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 1315 | if (error) { |
73d8c34f AS |
1316 | sdev_printk(KERN_INFO, sdev, |
1317 | "failed to add class device: %d\n", error); | |
860dc736 | 1318 | device_del(&sdev->sdev_gendev); |
ee37e09d | 1319 | return error; |
1da177e4 | 1320 | } |
860dc736 JB |
1321 | transport_add_device(&sdev->sdev_gendev); |
1322 | sdev->is_visible = 1; | |
1da177e4 | 1323 | |
17cb960f | 1324 | error = bsg_scsi_register_queue(rq, &sdev->sdev_gendev); |
80ed71ce | 1325 | if (error) |
860dc736 JB |
1326 | /* we're treating error on bsg register as non-fatal, |
1327 | * so pretend nothing went wrong */ | |
80ed71ce JB |
1328 | sdev_printk(KERN_INFO, sdev, |
1329 | "Failed to register bsg queue, errno=%d\n", error); | |
1330 | ||
bfd12944 | 1331 | /* add additional host specific attributes */ |
1da177e4 LT |
1332 | if (sdev->host->hostt->sdev_attrs) { |
1333 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 1334 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 1335 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 1336 | if (error) |
ee37e09d | 1337 | return error; |
1da177e4 LT |
1338 | } |
1339 | } | |
1da177e4 | 1340 | |
86b87cde SN |
1341 | if (sdev->host->hostt->sdev_groups) { |
1342 | error = sysfs_create_groups(&sdev->sdev_gendev.kobj, | |
1343 | sdev->host->hostt->sdev_groups); | |
1344 | if (error) | |
1345 | return error; | |
1346 | } | |
1347 | ||
6fe8c1db | 1348 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
1349 | return error; |
1350 | } | |
1351 | ||
903f4fed | 1352 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 1353 | { |
df133c21 | 1354 | struct device *dev = &sdev->sdev_gendev; |
0db6ca8a | 1355 | int res; |
df133c21 | 1356 | |
be821fd8 VK |
1357 | /* |
1358 | * This cleanup path is not reentrant and while it is impossible | |
1359 | * to get a new reference with scsi_device_get() someone can still | |
1360 | * hold a previously acquired one. | |
1361 | */ | |
1362 | if (sdev->sdev_state == SDEV_DEL) | |
1363 | return; | |
1364 | ||
860dc736 | 1365 | if (sdev->is_visible) { |
0db6ca8a BVA |
1366 | /* |
1367 | * If scsi_internal_target_block() is running concurrently, | |
1368 | * wait until it has finished before changing the device state. | |
1369 | */ | |
1370 | mutex_lock(&sdev->state_mutex); | |
255ee932 BVA |
1371 | /* |
1372 | * If blocked, we go straight to DEL and restart the queue so | |
1373 | * any commands issued during driver shutdown (like sync | |
1374 | * cache) are errored immediately. | |
1375 | */ | |
0db6ca8a | 1376 | res = scsi_device_set_state(sdev, SDEV_CANCEL); |
255ee932 BVA |
1377 | if (res != 0) { |
1378 | res = scsi_device_set_state(sdev, SDEV_DEL); | |
1379 | if (res == 0) | |
1380 | scsi_start_queue(sdev); | |
1381 | } | |
0db6ca8a BVA |
1382 | mutex_unlock(&sdev->state_mutex); |
1383 | ||
1384 | if (res != 0) | |
860dc736 | 1385 | return; |
1da177e4 | 1386 | |
86b87cde SN |
1387 | if (sdev->host->hostt->sdev_groups) |
1388 | sysfs_remove_groups(&sdev->sdev_gendev.kobj, | |
1389 | sdev->host->hostt->sdev_groups); | |
1390 | ||
860dc736 JB |
1391 | bsg_unregister_queue(sdev->request_queue); |
1392 | device_unregister(&sdev->sdev_dev); | |
1393 | transport_remove_device(dev); | |
e619e6cb BVA |
1394 | device_del(dev); |
1395 | } else | |
1396 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
1397 | |
1398 | /* | |
1399 | * Stop accepting new requests and wait until all queuecommand() and | |
1400 | * scsi_run_queue() invocations have finished before tearing down the | |
1401 | * device. | |
1402 | */ | |
0db6ca8a | 1403 | mutex_lock(&sdev->state_mutex); |
1da177e4 | 1404 | scsi_device_set_state(sdev, SDEV_DEL); |
0db6ca8a BVA |
1405 | mutex_unlock(&sdev->state_mutex); |
1406 | ||
b485462a BVA |
1407 | blk_cleanup_queue(sdev->request_queue); |
1408 | cancel_work_sync(&sdev->requeue_work); | |
1409 | ||
1da177e4 LT |
1410 | if (sdev->host->hostt->slave_destroy) |
1411 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 1412 | transport_destroy_device(dev); |
86cbfb56 | 1413 | |
e63ed0d7 JB |
1414 | /* |
1415 | * Paired with the kref_get() in scsi_sysfs_initialize(). We have | |
1416 | * remoed sysfs visibility from the device, so make the target | |
1417 | * invisible if this was the last device underneath it. | |
1418 | */ | |
1419 | scsi_target_reap(scsi_target(sdev)); | |
1420 | ||
df133c21 | 1421 | put_device(dev); |
903f4fed AS |
1422 | } |
1423 | ||
1424 | /** | |
1425 | * scsi_remove_device - unregister a device from the scsi bus | |
1426 | * @sdev: scsi_device to unregister | |
1427 | **/ | |
1428 | void scsi_remove_device(struct scsi_device *sdev) | |
1429 | { | |
54195002 AS |
1430 | struct Scsi_Host *shost = sdev->host; |
1431 | ||
0b950672 | 1432 | mutex_lock(&shost->scan_mutex); |
903f4fed | 1433 | __scsi_remove_device(sdev); |
0b950672 | 1434 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
1435 | } |
1436 | EXPORT_SYMBOL(scsi_remove_device); | |
1437 | ||
44818efb | 1438 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1439 | { |
1440 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1441 | unsigned long flags; | |
a64358db | 1442 | struct scsi_device *sdev; |
1da177e4 LT |
1443 | |
1444 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1445 | restart: |
1446 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
fbce4d97 HR |
1447 | /* |
1448 | * We cannot call scsi_device_get() here, as | |
1449 | * we might've been called from rmmod() causing | |
1450 | * scsi_device_get() to fail the module_is_live() | |
1451 | * check. | |
1452 | */ | |
1da177e4 | 1453 | if (sdev->channel != starget->channel || |
81b6c999 HR |
1454 | sdev->id != starget->id) |
1455 | continue; | |
1456 | if (sdev->sdev_state == SDEV_DEL || | |
1457 | sdev->sdev_state == SDEV_CANCEL || | |
fbce4d97 | 1458 | !get_device(&sdev->sdev_gendev)) |
1da177e4 LT |
1459 | continue; |
1460 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1461 | scsi_remove_device(sdev); | |
fbce4d97 | 1462 | put_device(&sdev->sdev_gendev); |
1da177e4 | 1463 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1464 | goto restart; |
1da177e4 LT |
1465 | } |
1466 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1467 | } |
1468 | ||
1da177e4 LT |
1469 | /** |
1470 | * scsi_remove_target - try to remove a target and all its devices | |
1471 | * @dev: generic starget or parent of generic stargets to be removed | |
1472 | * | |
1473 | * Note: This is slightly racy. It is possible that if the user | |
1474 | * requests the addition of another device then the target won't be | |
1475 | * removed. | |
1476 | */ | |
1477 | void scsi_remove_target(struct device *dev) | |
1478 | { | |
3b661a92 | 1479 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
305c2e71 | 1480 | struct scsi_target *starget; |
3b661a92 DW |
1481 | unsigned long flags; |
1482 | ||
40998193 | 1483 | restart: |
3b661a92 DW |
1484 | spin_lock_irqsave(shost->host_lock, flags); |
1485 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
90a88d6e | 1486 | if (starget->state == STARGET_DEL || |
f9279c96 EM |
1487 | starget->state == STARGET_REMOVE || |
1488 | starget->state == STARGET_CREATED_REMOVE) | |
3b661a92 DW |
1489 | continue; |
1490 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
e63ed0d7 | 1491 | kref_get(&starget->reap_ref); |
f9279c96 EM |
1492 | if (starget->state == STARGET_CREATED) |
1493 | starget->state = STARGET_CREATED_REMOVE; | |
1494 | else | |
1495 | starget->state = STARGET_REMOVE; | |
bc3f02a7 | 1496 | spin_unlock_irqrestore(shost->host_lock, flags); |
bc3f02a7 | 1497 | __scsi_remove_target(starget); |
40998193 CH |
1498 | scsi_target_reap(starget); |
1499 | goto restart; | |
3b661a92 | 1500 | } |
1da177e4 | 1501 | } |
3b661a92 | 1502 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 LT |
1503 | } |
1504 | EXPORT_SYMBOL(scsi_remove_target); | |
1505 | ||
1506 | int scsi_register_driver(struct device_driver *drv) | |
1507 | { | |
1508 | drv->bus = &scsi_bus_type; | |
1509 | ||
1510 | return driver_register(drv); | |
1511 | } | |
1512 | EXPORT_SYMBOL(scsi_register_driver); | |
1513 | ||
1514 | int scsi_register_interface(struct class_interface *intf) | |
1515 | { | |
1516 | intf->class = &sdev_class; | |
1517 | ||
1518 | return class_interface_register(intf); | |
1519 | } | |
1520 | EXPORT_SYMBOL(scsi_register_interface); | |
1521 | ||
1da177e4 LT |
1522 | /** |
1523 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1524 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1525 | **/ |
1526 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1527 | { | |
1528 | int error, i; | |
1529 | ||
f7120a4f | 1530 | /* add host specific attributes */ |
1da177e4 LT |
1531 | if (shost->hostt->shost_attrs) { |
1532 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1533 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1534 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1535 | if (error) |
1536 | return error; | |
1537 | } | |
1538 | } | |
1539 | ||
1540 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1541 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1542 | return 0; |
1543 | } | |
1544 | ||
bfd12944 KS |
1545 | static struct device_type scsi_dev_type = { |
1546 | .name = "scsi_device", | |
1547 | .release = scsi_device_dev_release, | |
1548 | .groups = scsi_sdev_attr_groups, | |
1549 | }; | |
1550 | ||
1da177e4 LT |
1551 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1552 | { | |
1553 | unsigned long flags; | |
1554 | struct Scsi_Host *shost = sdev->host; | |
1555 | struct scsi_target *starget = sdev->sdev_target; | |
1556 | ||
1557 | device_initialize(&sdev->sdev_gendev); | |
1558 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1559 | sdev->sdev_gendev.type = &scsi_dev_type; |
9cb78c16 | 1560 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%llu", |
71610f55 KS |
1561 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
1562 | ||
ee959b00 | 1563 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1564 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1565 | sdev->sdev_dev.class = &sdev_class; |
9cb78c16 | 1566 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%llu", |
71610f55 | 1567 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
50c4e964 AS |
1568 | /* |
1569 | * Get a default scsi_level from the target (derived from sibling | |
1570 | * devices). This is the best we can do for guessing how to set | |
1571 | * sdev->lun_in_cdb for the initial INQUIRY command. For LUN 0 the | |
1572 | * setting doesn't matter, because all the bits are zero anyway. | |
1573 | * But it does matter for higher LUNs. | |
1574 | */ | |
7c9d6f16 | 1575 | sdev->scsi_level = starget->scsi_level; |
50c4e964 AS |
1576 | if (sdev->scsi_level <= SCSI_2 && |
1577 | sdev->scsi_level != SCSI_UNKNOWN && | |
1578 | !shost->no_scsi2_lun_in_cdb) | |
1579 | sdev->lun_in_cdb = 1; | |
1580 | ||
1da177e4 LT |
1581 | transport_setup_device(&sdev->sdev_gendev); |
1582 | spin_lock_irqsave(shost->host_lock, flags); | |
1583 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1584 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1585 | spin_unlock_irqrestore(shost->host_lock, flags); | |
e63ed0d7 JB |
1586 | /* |
1587 | * device can now only be removed via __scsi_remove_device() so hold | |
1588 | * the target. Target will be held in CREATED state until something | |
1589 | * beneath it becomes visible (in which case it moves to RUNNING) | |
1590 | */ | |
1591 | kref_get(&starget->reap_ref); | |
1da177e4 LT |
1592 | } |
1593 | ||
1594 | int scsi_is_sdev_device(const struct device *dev) | |
1595 | { | |
13ba9bcb | 1596 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1597 | } |
1598 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1599 | ||
1600 | /* A blank transport template that is used in drivers that don't | |
1601 | * yet implement Transport Attributes */ | |
1602 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |