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> | |
20 | #include <scsi/scsi_transport.h> | |
44818efb | 21 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
22 | |
23 | #include "scsi_priv.h" | |
24 | #include "scsi_logging.h" | |
25 | ||
b0ed4336 HR |
26 | static struct device_type scsi_dev_type; |
27 | ||
0ad78200 | 28 | static const struct { |
1da177e4 LT |
29 | enum scsi_device_state value; |
30 | char *name; | |
31 | } sdev_states[] = { | |
32 | { SDEV_CREATED, "created" }, | |
33 | { SDEV_RUNNING, "running" }, | |
34 | { SDEV_CANCEL, "cancel" }, | |
35 | { SDEV_DEL, "deleted" }, | |
36 | { SDEV_QUIESCE, "quiesce" }, | |
37 | { SDEV_OFFLINE, "offline" }, | |
1b8d2620 | 38 | { SDEV_TRANSPORT_OFFLINE, "transport-offline" }, |
1da177e4 | 39 | { SDEV_BLOCK, "blocked" }, |
6f4267e3 | 40 | { SDEV_CREATED_BLOCK, "created-blocked" }, |
1da177e4 LT |
41 | }; |
42 | ||
43 | const char *scsi_device_state_name(enum scsi_device_state state) | |
44 | { | |
45 | int i; | |
46 | char *name = NULL; | |
47 | ||
6391a113 | 48 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
49 | if (sdev_states[i].value == state) { |
50 | name = sdev_states[i].name; | |
51 | break; | |
52 | } | |
53 | } | |
54 | return name; | |
55 | } | |
56 | ||
0ad78200 | 57 | static const struct { |
d3301874 MA |
58 | enum scsi_host_state value; |
59 | char *name; | |
60 | } shost_states[] = { | |
61 | { SHOST_CREATED, "created" }, | |
62 | { SHOST_RUNNING, "running" }, | |
63 | { SHOST_CANCEL, "cancel" }, | |
64 | { SHOST_DEL, "deleted" }, | |
65 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
66 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
67 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
68 | }; |
69 | const char *scsi_host_state_name(enum scsi_host_state state) | |
70 | { | |
71 | int i; | |
72 | char *name = NULL; | |
73 | ||
6391a113 | 74 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
75 | if (shost_states[i].value == state) { |
76 | name = shost_states[i].name; | |
77 | break; | |
78 | } | |
79 | } | |
80 | return name; | |
81 | } | |
82 | ||
1da177e4 LT |
83 | static int check_set(unsigned int *val, char *src) |
84 | { | |
85 | char *last; | |
86 | ||
87 | if (strncmp(src, "-", 20) == 0) { | |
88 | *val = SCAN_WILD_CARD; | |
89 | } else { | |
90 | /* | |
91 | * Doesn't check for int overflow | |
92 | */ | |
93 | *val = simple_strtoul(src, &last, 0); | |
94 | if (*last != '\0') | |
95 | return 1; | |
96 | } | |
97 | return 0; | |
98 | } | |
99 | ||
100 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
101 | { | |
102 | char s1[15], s2[15], s3[15], junk; | |
103 | unsigned int channel, id, lun; | |
104 | int res; | |
105 | ||
106 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
107 | if (res != 3) | |
108 | return -EINVAL; | |
109 | if (check_set(&channel, s1)) | |
110 | return -EINVAL; | |
111 | if (check_set(&id, s2)) | |
112 | return -EINVAL; | |
113 | if (check_set(&lun, s3)) | |
114 | return -EINVAL; | |
e02f3f59 CH |
115 | if (shost->transportt->user_scan) |
116 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
117 | else | |
118 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
119 | return res; |
120 | } | |
121 | ||
122 | /* | |
123 | * shost_show_function: macro to create an attr function that can be used to | |
124 | * show a non-bit field. | |
125 | */ | |
126 | #define shost_show_function(name, field, format_string) \ | |
127 | static ssize_t \ | |
ee959b00 TJ |
128 | show_##name (struct device *dev, struct device_attribute *attr, \ |
129 | char *buf) \ | |
1da177e4 | 130 | { \ |
ee959b00 | 131 | struct Scsi_Host *shost = class_to_shost(dev); \ |
1da177e4 LT |
132 | return snprintf (buf, 20, format_string, shost->field); \ |
133 | } | |
134 | ||
135 | /* | |
136 | * shost_rd_attr: macro to create a function and attribute variable for a | |
137 | * read only field. | |
138 | */ | |
139 | #define shost_rd_attr2(name, field, format_string) \ | |
140 | shost_show_function(name, field, format_string) \ | |
ee959b00 | 141 | static DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); |
1da177e4 LT |
142 | |
143 | #define shost_rd_attr(field, format_string) \ | |
144 | shost_rd_attr2(field, field, format_string) | |
145 | ||
146 | /* | |
147 | * Create the actual show/store functions and data structures. | |
148 | */ | |
149 | ||
ee959b00 TJ |
150 | static ssize_t |
151 | store_scan(struct device *dev, struct device_attribute *attr, | |
152 | const char *buf, size_t count) | |
1da177e4 | 153 | { |
ee959b00 | 154 | struct Scsi_Host *shost = class_to_shost(dev); |
1da177e4 LT |
155 | int res; |
156 | ||
157 | res = scsi_scan(shost, buf); | |
158 | if (res == 0) | |
159 | res = count; | |
160 | return res; | |
161 | }; | |
ee959b00 | 162 | static DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); |
1da177e4 | 163 | |
d3301874 | 164 | static ssize_t |
ee959b00 TJ |
165 | store_shost_state(struct device *dev, struct device_attribute *attr, |
166 | const char *buf, size_t count) | |
d3301874 MA |
167 | { |
168 | int i; | |
ee959b00 | 169 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
170 | enum scsi_host_state state = 0; |
171 | ||
6391a113 | 172 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
173 | const int len = strlen(shost_states[i].name); |
174 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
175 | buf[len] == '\n') { | |
176 | state = shost_states[i].value; | |
177 | break; | |
178 | } | |
179 | } | |
180 | if (!state) | |
181 | return -EINVAL; | |
182 | ||
183 | if (scsi_host_set_state(shost, state)) | |
184 | return -EINVAL; | |
185 | return count; | |
186 | } | |
187 | ||
188 | static ssize_t | |
ee959b00 | 189 | show_shost_state(struct device *dev, struct device_attribute *attr, char *buf) |
d3301874 | 190 | { |
ee959b00 | 191 | struct Scsi_Host *shost = class_to_shost(dev); |
d3301874 MA |
192 | const char *name = scsi_host_state_name(shost->shost_state); |
193 | ||
194 | if (!name) | |
195 | return -EINVAL; | |
196 | ||
197 | return snprintf(buf, 20, "%s\n", name); | |
198 | } | |
199 | ||
ee959b00 TJ |
200 | /* DEVICE_ATTR(state) clashes with dev_attr_state for sdev */ |
201 | struct device_attribute dev_attr_hstate = | |
202 | __ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
d3301874 | 203 | |
5dc2b89e FT |
204 | static ssize_t |
205 | show_shost_mode(unsigned int mode, char *buf) | |
206 | { | |
207 | ssize_t len = 0; | |
208 | ||
209 | if (mode & MODE_INITIATOR) | |
210 | len = sprintf(buf, "%s", "Initiator"); | |
211 | ||
212 | if (mode & MODE_TARGET) | |
213 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
214 | ||
215 | len += sprintf(buf + len, "\n"); | |
216 | ||
217 | return len; | |
218 | } | |
219 | ||
ee959b00 TJ |
220 | static ssize_t |
221 | show_shost_supported_mode(struct device *dev, struct device_attribute *attr, | |
222 | char *buf) | |
5dc2b89e | 223 | { |
ee959b00 | 224 | struct Scsi_Host *shost = class_to_shost(dev); |
7a39ac3f | 225 | unsigned int supported_mode = shost->hostt->supported_mode; |
5dc2b89e | 226 | |
7a39ac3f JB |
227 | if (supported_mode == MODE_UNKNOWN) |
228 | /* by default this should be initiator */ | |
229 | supported_mode = MODE_INITIATOR; | |
230 | ||
231 | return show_shost_mode(supported_mode, buf); | |
5dc2b89e FT |
232 | } |
233 | ||
ee959b00 | 234 | static DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); |
5dc2b89e | 235 | |
ee959b00 TJ |
236 | static ssize_t |
237 | show_shost_active_mode(struct device *dev, | |
238 | struct device_attribute *attr, char *buf) | |
5dc2b89e | 239 | { |
ee959b00 | 240 | struct Scsi_Host *shost = class_to_shost(dev); |
5dc2b89e FT |
241 | |
242 | if (shost->active_mode == MODE_UNKNOWN) | |
243 | return snprintf(buf, 20, "unknown\n"); | |
244 | else | |
245 | return show_shost_mode(shost->active_mode, buf); | |
246 | } | |
247 | ||
ee959b00 | 248 | static DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); |
5dc2b89e | 249 | |
29443691 VC |
250 | static int check_reset_type(char *str) |
251 | { | |
252 | if (strncmp(str, "adapter", 10) == 0) | |
253 | return SCSI_ADAPTER_RESET; | |
254 | else if (strncmp(str, "firmware", 10) == 0) | |
255 | return SCSI_FIRMWARE_RESET; | |
256 | else | |
257 | return 0; | |
258 | } | |
259 | ||
260 | static ssize_t | |
261 | store_host_reset(struct device *dev, struct device_attribute *attr, | |
262 | const char *buf, size_t count) | |
263 | { | |
264 | struct Scsi_Host *shost = class_to_shost(dev); | |
265 | struct scsi_host_template *sht = shost->hostt; | |
266 | int ret = -EINVAL; | |
267 | char str[10]; | |
268 | int type; | |
269 | ||
270 | sscanf(buf, "%s", str); | |
271 | type = check_reset_type(str); | |
272 | ||
273 | if (!type) | |
274 | goto exit_store_host_reset; | |
275 | ||
276 | if (sht->host_reset) | |
277 | ret = sht->host_reset(shost, type); | |
278 | ||
279 | exit_store_host_reset: | |
280 | if (ret == 0) | |
281 | ret = count; | |
282 | return ret; | |
283 | } | |
284 | ||
285 | static DEVICE_ATTR(host_reset, S_IWUSR, NULL, store_host_reset); | |
286 | ||
1da177e4 LT |
287 | shost_rd_attr(unique_id, "%u\n"); |
288 | shost_rd_attr(host_busy, "%hu\n"); | |
289 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 290 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 | 291 | shost_rd_attr(sg_tablesize, "%hu\n"); |
13f05c8d | 292 | shost_rd_attr(sg_prot_tablesize, "%hu\n"); |
1da177e4 | 293 | shost_rd_attr(unchecked_isa_dma, "%d\n"); |
4469f987 MP |
294 | shost_rd_attr(prot_capabilities, "%u\n"); |
295 | shost_rd_attr(prot_guard_type, "%hd\n"); | |
1da177e4 LT |
296 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); |
297 | ||
f7120a4f HR |
298 | static struct attribute *scsi_sysfs_shost_attrs[] = { |
299 | &dev_attr_unique_id.attr, | |
300 | &dev_attr_host_busy.attr, | |
301 | &dev_attr_cmd_per_lun.attr, | |
302 | &dev_attr_can_queue.attr, | |
303 | &dev_attr_sg_tablesize.attr, | |
13f05c8d | 304 | &dev_attr_sg_prot_tablesize.attr, |
f7120a4f HR |
305 | &dev_attr_unchecked_isa_dma.attr, |
306 | &dev_attr_proc_name.attr, | |
307 | &dev_attr_scan.attr, | |
308 | &dev_attr_hstate.attr, | |
309 | &dev_attr_supported_mode.attr, | |
310 | &dev_attr_active_mode.attr, | |
4469f987 MP |
311 | &dev_attr_prot_capabilities.attr, |
312 | &dev_attr_prot_guard_type.attr, | |
29443691 | 313 | &dev_attr_host_reset.attr, |
f7120a4f HR |
314 | NULL |
315 | }; | |
316 | ||
317 | struct attribute_group scsi_shost_attr_group = { | |
318 | .attrs = scsi_sysfs_shost_attrs, | |
319 | }; | |
320 | ||
a4dbd674 | 321 | const struct attribute_group *scsi_sysfs_shost_attr_groups[] = { |
f7120a4f | 322 | &scsi_shost_attr_group, |
1da177e4 LT |
323 | NULL |
324 | }; | |
325 | ||
ee959b00 | 326 | static void scsi_device_cls_release(struct device *class_dev) |
1da177e4 LT |
327 | { |
328 | struct scsi_device *sdev; | |
329 | ||
330 | sdev = class_to_sdev(class_dev); | |
331 | put_device(&sdev->sdev_gendev); | |
332 | } | |
333 | ||
65f27f38 | 334 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
335 | { |
336 | struct scsi_device *sdev; | |
337 | struct device *parent; | |
338 | struct scsi_target *starget; | |
a341cd0f | 339 | struct list_head *this, *tmp; |
1da177e4 LT |
340 | unsigned long flags; |
341 | ||
65f27f38 DH |
342 | sdev = container_of(work, struct scsi_device, ew.work); |
343 | ||
344 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
345 | starget = to_scsi_target(parent); |
346 | ||
347 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
348 | starget->reap_ref++; | |
349 | list_del(&sdev->siblings); | |
350 | list_del(&sdev->same_target_siblings); | |
351 | list_del(&sdev->starved_entry); | |
352 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
353 | ||
a341cd0f JG |
354 | cancel_work_sync(&sdev->event_work); |
355 | ||
356 | list_for_each_safe(this, tmp, &sdev->event_list) { | |
357 | struct scsi_event *evt; | |
358 | ||
359 | evt = list_entry(this, struct scsi_event, node); | |
360 | list_del(&evt->node); | |
361 | kfree(evt); | |
362 | } | |
363 | ||
e73e079b | 364 | blk_put_queue(sdev->request_queue); |
86cbfb56 JB |
365 | /* NULL queue means the device can't be used */ |
366 | sdev->request_queue = NULL; | |
1da177e4 LT |
367 | |
368 | scsi_target_reap(scsi_target(sdev)); | |
369 | ||
370 | kfree(sdev->inquiry); | |
371 | kfree(sdev); | |
372 | ||
373 | if (parent) | |
374 | put_device(parent); | |
375 | } | |
376 | ||
65110b21 JB |
377 | static void scsi_device_dev_release(struct device *dev) |
378 | { | |
ffedb452 | 379 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 380 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 381 | &sdp->ew); |
65110b21 JB |
382 | } |
383 | ||
52c1da39 | 384 | static struct class sdev_class = { |
1da177e4 | 385 | .name = "scsi_device", |
ee959b00 | 386 | .dev_release = scsi_device_cls_release, |
1da177e4 LT |
387 | }; |
388 | ||
389 | /* all probing is done in the individual ->probe routines */ | |
390 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
391 | { | |
b0ed4336 HR |
392 | struct scsi_device *sdp; |
393 | ||
394 | if (dev->type != &scsi_dev_type) | |
395 | return 0; | |
396 | ||
397 | sdp = to_scsi_device(dev); | |
1da177e4 LT |
398 | if (sdp->no_uld_attach) |
399 | return 0; | |
400 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
401 | } | |
402 | ||
7eff2e7a | 403 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 | 404 | { |
1f42ea7b JB |
405 | struct scsi_device *sdev; |
406 | ||
407 | if (dev->type != &scsi_dev_type) | |
408 | return 0; | |
409 | ||
410 | sdev = to_scsi_device(dev); | |
d7b8bcb0 | 411 | |
7eff2e7a | 412 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
413 | return 0; |
414 | } | |
415 | ||
1da177e4 LT |
416 | struct bus_type scsi_bus_type = { |
417 | .name = "scsi", | |
418 | .match = scsi_bus_match, | |
d7b8bcb0 | 419 | .uevent = scsi_bus_uevent, |
aa338601 | 420 | #ifdef CONFIG_PM |
db5bd1e0 | 421 | .pm = &scsi_bus_pm_ops, |
e6da54d8 | 422 | #endif |
1da177e4 | 423 | }; |
a6a8d9f8 | 424 | EXPORT_SYMBOL_GPL(scsi_bus_type); |
1da177e4 LT |
425 | |
426 | int scsi_sysfs_register(void) | |
427 | { | |
428 | int error; | |
429 | ||
430 | error = bus_register(&scsi_bus_type); | |
431 | if (!error) { | |
432 | error = class_register(&sdev_class); | |
433 | if (error) | |
434 | bus_unregister(&scsi_bus_type); | |
435 | } | |
436 | ||
437 | return error; | |
438 | } | |
439 | ||
440 | void scsi_sysfs_unregister(void) | |
441 | { | |
442 | class_unregister(&sdev_class); | |
443 | bus_unregister(&scsi_bus_type); | |
444 | } | |
445 | ||
446 | /* | |
447 | * sdev_show_function: macro to create an attr function that can be used to | |
448 | * show a non-bit field. | |
449 | */ | |
450 | #define sdev_show_function(field, format_string) \ | |
451 | static ssize_t \ | |
ee959b00 TJ |
452 | sdev_show_##field (struct device *dev, struct device_attribute *attr, \ |
453 | char *buf) \ | |
1da177e4 LT |
454 | { \ |
455 | struct scsi_device *sdev; \ | |
456 | sdev = to_scsi_device(dev); \ | |
457 | return snprintf (buf, 20, format_string, sdev->field); \ | |
458 | } \ | |
459 | ||
460 | /* | |
461 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
462 | * read only field. | |
463 | */ | |
464 | #define sdev_rd_attr(field, format_string) \ | |
465 | sdev_show_function(field, format_string) \ | |
466 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
467 | ||
468 | ||
469 | /* | |
160e7f67 | 470 | * sdev_rw_attr: create a function and attribute variable for a |
1da177e4 LT |
471 | * read/write field. |
472 | */ | |
473 | #define sdev_rw_attr(field, format_string) \ | |
474 | sdev_show_function(field, format_string) \ | |
475 | \ | |
476 | static ssize_t \ | |
ee959b00 TJ |
477 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
478 | const char *buf, size_t count) \ | |
1da177e4 LT |
479 | { \ |
480 | struct scsi_device *sdev; \ | |
481 | sdev = to_scsi_device(dev); \ | |
160e7f67 | 482 | sscanf (buf, format_string, &sdev->field); \ |
1da177e4 LT |
483 | return count; \ |
484 | } \ | |
485 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
486 | ||
487 | /* Currently we don't export bit fields, but we might in future, | |
488 | * so leave this code in */ | |
489 | #if 0 | |
490 | /* | |
491 | * sdev_rd_attr: create a function and attribute variable for a | |
492 | * read/write bit field. | |
493 | */ | |
494 | #define sdev_rw_attr_bit(field) \ | |
495 | sdev_show_function(field, "%d\n") \ | |
496 | \ | |
497 | static ssize_t \ | |
ee959b00 TJ |
498 | sdev_store_##field (struct device *dev, struct device_attribute *attr, \ |
499 | const char *buf, size_t count) \ | |
1da177e4 LT |
500 | { \ |
501 | int ret; \ | |
502 | struct scsi_device *sdev; \ | |
503 | ret = scsi_sdev_check_buf_bit(buf); \ | |
504 | if (ret >= 0) { \ | |
505 | sdev = to_scsi_device(dev); \ | |
506 | sdev->field = ret; \ | |
507 | ret = count; \ | |
508 | } \ | |
509 | return ret; \ | |
510 | } \ | |
511 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
512 | ||
513 | /* | |
514 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
515 | * else return -EINVAL. | |
516 | */ | |
517 | static int scsi_sdev_check_buf_bit(const char *buf) | |
518 | { | |
519 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
520 | if (buf[0] == '1') | |
521 | return 1; | |
522 | else if (buf[0] == '0') | |
523 | return 0; | |
524 | else | |
525 | return -EINVAL; | |
526 | } else | |
527 | return -EINVAL; | |
528 | } | |
529 | #endif | |
530 | /* | |
531 | * Create the actual show/store functions and data structures. | |
532 | */ | |
533 | sdev_rd_attr (device_blocked, "%d\n"); | |
534 | sdev_rd_attr (queue_depth, "%d\n"); | |
535 | sdev_rd_attr (type, "%d\n"); | |
536 | sdev_rd_attr (scsi_level, "%d\n"); | |
537 | sdev_rd_attr (vendor, "%.8s\n"); | |
538 | sdev_rd_attr (model, "%.16s\n"); | |
539 | sdev_rd_attr (rev, "%.4s\n"); | |
540 | ||
242f9dcb JA |
541 | /* |
542 | * TODO: can we make these symlinks to the block layer ones? | |
543 | */ | |
1da177e4 | 544 | static ssize_t |
10523b3b | 545 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
546 | { |
547 | struct scsi_device *sdev; | |
548 | sdev = to_scsi_device(dev); | |
242f9dcb | 549 | return snprintf(buf, 20, "%d\n", sdev->request_queue->rq_timeout / HZ); |
1da177e4 LT |
550 | } |
551 | ||
552 | static ssize_t | |
ee959b00 TJ |
553 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, |
554 | const char *buf, size_t count) | |
1da177e4 LT |
555 | { |
556 | struct scsi_device *sdev; | |
557 | int timeout; | |
558 | sdev = to_scsi_device(dev); | |
559 | sscanf (buf, "%d\n", &timeout); | |
242f9dcb | 560 | blk_queue_rq_timeout(sdev->request_queue, timeout * HZ); |
1da177e4 LT |
561 | return count; |
562 | } | |
563 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
564 | ||
565 | static ssize_t | |
ee959b00 TJ |
566 | store_rescan_field (struct device *dev, struct device_attribute *attr, |
567 | const char *buf, size_t count) | |
1da177e4 LT |
568 | { |
569 | scsi_rescan_device(dev); | |
570 | return count; | |
571 | } | |
572 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
573 | ||
d9a9cdfb AS |
574 | static void sdev_store_delete_callback(struct device *dev) |
575 | { | |
576 | scsi_remove_device(to_scsi_device(dev)); | |
577 | } | |
578 | ||
ee959b00 TJ |
579 | static ssize_t |
580 | sdev_store_delete(struct device *dev, struct device_attribute *attr, | |
581 | const char *buf, size_t count) | |
1da177e4 | 582 | { |
d9a9cdfb AS |
583 | int rc; |
584 | ||
585 | /* An attribute cannot be unregistered by one of its own methods, | |
586 | * so we have to use this roundabout approach. | |
587 | */ | |
588 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
589 | if (rc) | |
590 | count = rc; | |
1da177e4 LT |
591 | return count; |
592 | }; | |
593 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
594 | ||
595 | static ssize_t | |
ee959b00 TJ |
596 | store_state_field(struct device *dev, struct device_attribute *attr, |
597 | const char *buf, size_t count) | |
1da177e4 LT |
598 | { |
599 | int i; | |
600 | struct scsi_device *sdev = to_scsi_device(dev); | |
601 | enum scsi_device_state state = 0; | |
602 | ||
6391a113 | 603 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
604 | const int len = strlen(sdev_states[i].name); |
605 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
606 | buf[len] == '\n') { | |
607 | state = sdev_states[i].value; | |
608 | break; | |
609 | } | |
610 | } | |
611 | if (!state) | |
612 | return -EINVAL; | |
613 | ||
614 | if (scsi_device_set_state(sdev, state)) | |
615 | return -EINVAL; | |
616 | return count; | |
617 | } | |
618 | ||
619 | static ssize_t | |
10523b3b | 620 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
621 | { |
622 | struct scsi_device *sdev = to_scsi_device(dev); | |
623 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
624 | ||
625 | if (!name) | |
626 | return -EINVAL; | |
627 | ||
628 | return snprintf(buf, 20, "%s\n", name); | |
629 | } | |
630 | ||
631 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
632 | ||
633 | static ssize_t | |
ee959b00 TJ |
634 | show_queue_type_field(struct device *dev, struct device_attribute *attr, |
635 | char *buf) | |
1da177e4 LT |
636 | { |
637 | struct scsi_device *sdev = to_scsi_device(dev); | |
638 | const char *name = "none"; | |
639 | ||
640 | if (sdev->ordered_tags) | |
641 | name = "ordered"; | |
642 | else if (sdev->simple_tags) | |
643 | name = "simple"; | |
644 | ||
645 | return snprintf(buf, 20, "%s\n", name); | |
646 | } | |
647 | ||
648 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
649 | ||
650 | static ssize_t | |
ee959b00 | 651 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
652 | { |
653 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
654 | } | |
655 | ||
656 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
657 | ||
658 | #define show_sdev_iostat(field) \ | |
659 | static ssize_t \ | |
ee959b00 TJ |
660 | show_iostat_##field(struct device *dev, struct device_attribute *attr, \ |
661 | char *buf) \ | |
1da177e4 LT |
662 | { \ |
663 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
664 | unsigned long long count = atomic_read(&sdev->field); \ | |
665 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
666 | } \ | |
667 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
668 | ||
669 | show_sdev_iostat(iorequest_cnt); | |
670 | show_sdev_iostat(iodone_cnt); | |
671 | show_sdev_iostat(ioerr_cnt); | |
672 | ||
d7b8bcb0 MT |
673 | static ssize_t |
674 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
675 | { | |
676 | struct scsi_device *sdev; | |
677 | sdev = to_scsi_device(dev); | |
678 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
679 | } | |
680 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 | 681 | |
a341cd0f JG |
682 | #define DECLARE_EVT_SHOW(name, Cap_name) \ |
683 | static ssize_t \ | |
684 | sdev_show_evt_##name(struct device *dev, struct device_attribute *attr, \ | |
ee959b00 | 685 | char *buf) \ |
a341cd0f JG |
686 | { \ |
687 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
688 | int val = test_bit(SDEV_EVT_##Cap_name, sdev->supported_events);\ | |
689 | return snprintf(buf, 20, "%d\n", val); \ | |
690 | } | |
691 | ||
692 | #define DECLARE_EVT_STORE(name, Cap_name) \ | |
693 | static ssize_t \ | |
ee959b00 | 694 | sdev_store_evt_##name(struct device *dev, struct device_attribute *attr,\ |
a341cd0f JG |
695 | const char *buf, size_t count) \ |
696 | { \ | |
697 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
698 | int val = simple_strtoul(buf, NULL, 0); \ | |
699 | if (val == 0) \ | |
700 | clear_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
701 | else if (val == 1) \ | |
702 | set_bit(SDEV_EVT_##Cap_name, sdev->supported_events); \ | |
703 | else \ | |
704 | return -EINVAL; \ | |
705 | return count; \ | |
706 | } | |
707 | ||
708 | #define DECLARE_EVT(name, Cap_name) \ | |
709 | DECLARE_EVT_SHOW(name, Cap_name) \ | |
710 | DECLARE_EVT_STORE(name, Cap_name) \ | |
711 | static DEVICE_ATTR(evt_##name, S_IRUGO, sdev_show_evt_##name, \ | |
712 | sdev_store_evt_##name); | |
713 | #define REF_EVT(name) &dev_attr_evt_##name.attr | |
714 | ||
715 | DECLARE_EVT(media_change, MEDIA_CHANGE) | |
716 | ||
1da177e4 | 717 | /* Default template for device attributes. May NOT be modified */ |
bfd12944 KS |
718 | static struct attribute *scsi_sdev_attrs[] = { |
719 | &dev_attr_device_blocked.attr, | |
720 | &dev_attr_type.attr, | |
721 | &dev_attr_scsi_level.attr, | |
722 | &dev_attr_vendor.attr, | |
723 | &dev_attr_model.attr, | |
724 | &dev_attr_rev.attr, | |
725 | &dev_attr_rescan.attr, | |
726 | &dev_attr_delete.attr, | |
727 | &dev_attr_state.attr, | |
728 | &dev_attr_timeout.attr, | |
729 | &dev_attr_iocounterbits.attr, | |
730 | &dev_attr_iorequest_cnt.attr, | |
731 | &dev_attr_iodone_cnt.attr, | |
732 | &dev_attr_ioerr_cnt.attr, | |
733 | &dev_attr_modalias.attr, | |
a341cd0f | 734 | REF_EVT(media_change), |
bfd12944 KS |
735 | NULL |
736 | }; | |
737 | ||
738 | static struct attribute_group scsi_sdev_attr_group = { | |
739 | .attrs = scsi_sdev_attrs, | |
740 | }; | |
741 | ||
a4dbd674 | 742 | static const struct attribute_group *scsi_sdev_attr_groups[] = { |
bfd12944 | 743 | &scsi_sdev_attr_group, |
1da177e4 LT |
744 | NULL |
745 | }; | |
746 | ||
ee959b00 TJ |
747 | static ssize_t |
748 | sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, | |
749 | const char *buf, size_t count) | |
1da177e4 LT |
750 | { |
751 | int depth, retval; | |
752 | struct scsi_device *sdev = to_scsi_device(dev); | |
753 | struct scsi_host_template *sht = sdev->host->hostt; | |
754 | ||
755 | if (!sht->change_queue_depth) | |
756 | return -EINVAL; | |
757 | ||
758 | depth = simple_strtoul(buf, NULL, 0); | |
759 | ||
760 | if (depth < 1) | |
761 | return -EINVAL; | |
762 | ||
e881a172 MC |
763 | retval = sht->change_queue_depth(sdev, depth, |
764 | SCSI_QDEPTH_DEFAULT); | |
1da177e4 LT |
765 | if (retval < 0) |
766 | return retval; | |
767 | ||
4a84067d VD |
768 | sdev->max_queue_depth = sdev->queue_depth; |
769 | ||
1da177e4 LT |
770 | return count; |
771 | } | |
772 | ||
773 | static struct device_attribute sdev_attr_queue_depth_rw = | |
774 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
775 | sdev_store_queue_depth_rw); | |
776 | ||
4a84067d VD |
777 | static ssize_t |
778 | sdev_show_queue_ramp_up_period(struct device *dev, | |
779 | struct device_attribute *attr, | |
780 | char *buf) | |
781 | { | |
782 | struct scsi_device *sdev; | |
783 | sdev = to_scsi_device(dev); | |
784 | return snprintf(buf, 20, "%u\n", | |
785 | jiffies_to_msecs(sdev->queue_ramp_up_period)); | |
786 | } | |
787 | ||
788 | static ssize_t | |
789 | sdev_store_queue_ramp_up_period(struct device *dev, | |
790 | struct device_attribute *attr, | |
791 | const char *buf, size_t count) | |
792 | { | |
793 | struct scsi_device *sdev = to_scsi_device(dev); | |
794 | unsigned long period; | |
795 | ||
796 | if (strict_strtoul(buf, 10, &period)) | |
797 | return -EINVAL; | |
798 | ||
799 | sdev->queue_ramp_up_period = msecs_to_jiffies(period); | |
800 | return period; | |
801 | } | |
802 | ||
803 | static struct device_attribute sdev_attr_queue_ramp_up_period = | |
804 | __ATTR(queue_ramp_up_period, S_IRUGO | S_IWUSR, | |
805 | sdev_show_queue_ramp_up_period, | |
806 | sdev_store_queue_ramp_up_period); | |
807 | ||
ee959b00 TJ |
808 | static ssize_t |
809 | sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, | |
810 | const char *buf, size_t count) | |
1da177e4 LT |
811 | { |
812 | struct scsi_device *sdev = to_scsi_device(dev); | |
813 | struct scsi_host_template *sht = sdev->host->hostt; | |
814 | int tag_type = 0, retval; | |
815 | int prev_tag_type = scsi_get_tag_type(sdev); | |
816 | ||
817 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
818 | return -EINVAL; | |
819 | ||
820 | if (strncmp(buf, "ordered", 7) == 0) | |
821 | tag_type = MSG_ORDERED_TAG; | |
822 | else if (strncmp(buf, "simple", 6) == 0) | |
823 | tag_type = MSG_SIMPLE_TAG; | |
824 | else if (strncmp(buf, "none", 4) != 0) | |
825 | return -EINVAL; | |
826 | ||
827 | if (tag_type == prev_tag_type) | |
828 | return count; | |
829 | ||
830 | retval = sht->change_queue_type(sdev, tag_type); | |
831 | if (retval < 0) | |
832 | return retval; | |
833 | ||
834 | return count; | |
835 | } | |
836 | ||
643eb2d9 JB |
837 | static int scsi_target_add(struct scsi_target *starget) |
838 | { | |
839 | int error; | |
840 | ||
841 | if (starget->state != STARGET_CREATED) | |
842 | return 0; | |
843 | ||
844 | error = device_add(&starget->dev); | |
845 | if (error) { | |
846 | dev_err(&starget->dev, "target device_add failed, error %d\n", error); | |
643eb2d9 JB |
847 | return error; |
848 | } | |
849 | transport_add_device(&starget->dev); | |
850 | starget->state = STARGET_RUNNING; | |
851 | ||
bc4f2401 AS |
852 | pm_runtime_set_active(&starget->dev); |
853 | pm_runtime_enable(&starget->dev); | |
854 | device_enable_async_suspend(&starget->dev); | |
855 | ||
643eb2d9 JB |
856 | return 0; |
857 | } | |
858 | ||
1da177e4 LT |
859 | static struct device_attribute sdev_attr_queue_type_rw = |
860 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
861 | sdev_store_queue_type_rw); | |
862 | ||
1da177e4 LT |
863 | /** |
864 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
865 | * @sdev: scsi_device to add | |
866 | * | |
867 | * Return value: | |
868 | * 0 on Success / non-zero on Failure | |
869 | **/ | |
870 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
871 | { | |
872 | int error, i; | |
80ed71ce | 873 | struct request_queue *rq = sdev->request_queue; |
643eb2d9 | 874 | struct scsi_target *starget = sdev->sdev_target; |
1da177e4 | 875 | |
ee37e09d AS |
876 | error = scsi_device_set_state(sdev, SDEV_RUNNING); |
877 | if (error) | |
1da177e4 LT |
878 | return error; |
879 | ||
643eb2d9 JB |
880 | error = scsi_target_add(starget); |
881 | if (error) | |
882 | return error; | |
883 | ||
884 | transport_configure_device(&starget->dev); | |
bc4f2401 | 885 | |
4cb077d9 | 886 | device_enable_async_suspend(&sdev->sdev_gendev); |
bc4f2401 AS |
887 | scsi_autopm_get_target(starget); |
888 | pm_runtime_set_active(&sdev->sdev_gendev); | |
889 | pm_runtime_forbid(&sdev->sdev_gendev); | |
890 | pm_runtime_enable(&sdev->sdev_gendev); | |
891 | scsi_autopm_put_target(starget); | |
892 | ||
893 | /* The following call will keep sdev active indefinitely, until | |
894 | * its driver does a corresponding scsi_autopm_pm_device(). Only | |
895 | * drivers supporting autosuspend will do this. | |
896 | */ | |
897 | scsi_autopm_get_device(sdev); | |
898 | ||
1da177e4 LT |
899 | error = device_add(&sdev->sdev_gendev); |
900 | if (error) { | |
73d8c34f AS |
901 | sdev_printk(KERN_INFO, sdev, |
902 | "failed to add device: %d\n", error); | |
ee37e09d | 903 | return error; |
1da177e4 | 904 | } |
4cb077d9 | 905 | device_enable_async_suspend(&sdev->sdev_dev); |
ee959b00 | 906 | error = device_add(&sdev->sdev_dev); |
1da177e4 | 907 | if (error) { |
73d8c34f AS |
908 | sdev_printk(KERN_INFO, sdev, |
909 | "failed to add class device: %d\n", error); | |
860dc736 | 910 | device_del(&sdev->sdev_gendev); |
ee37e09d | 911 | return error; |
1da177e4 | 912 | } |
860dc736 JB |
913 | transport_add_device(&sdev->sdev_gendev); |
914 | sdev->is_visible = 1; | |
1da177e4 | 915 | |
bfd12944 | 916 | /* create queue files, which may be writable, depending on the host */ |
4a84067d VD |
917 | if (sdev->host->hostt->change_queue_depth) { |
918 | error = device_create_file(&sdev->sdev_gendev, | |
919 | &sdev_attr_queue_depth_rw); | |
920 | error = device_create_file(&sdev->sdev_gendev, | |
921 | &sdev_attr_queue_ramp_up_period); | |
922 | } | |
bfd12944 KS |
923 | else |
924 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
860dc736 | 925 | if (error) |
ee37e09d | 926 | return error; |
860dc736 | 927 | |
bfd12944 KS |
928 | if (sdev->host->hostt->change_queue_type) |
929 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
930 | else | |
931 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
860dc736 | 932 | if (error) |
ee37e09d | 933 | return error; |
bfd12944 | 934 | |
97f46ae4 | 935 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL, NULL); |
80ed71ce JB |
936 | |
937 | if (error) | |
860dc736 JB |
938 | /* we're treating error on bsg register as non-fatal, |
939 | * so pretend nothing went wrong */ | |
80ed71ce JB |
940 | sdev_printk(KERN_INFO, sdev, |
941 | "Failed to register bsg queue, errno=%d\n", error); | |
942 | ||
bfd12944 | 943 | /* add additional host specific attributes */ |
1da177e4 LT |
944 | if (sdev->host->hostt->sdev_attrs) { |
945 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 946 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 | 947 | sdev->host->hostt->sdev_attrs[i]); |
860dc736 | 948 | if (error) |
ee37e09d | 949 | return error; |
1da177e4 LT |
950 | } |
951 | } | |
1da177e4 | 952 | |
1da177e4 LT |
953 | return error; |
954 | } | |
955 | ||
903f4fed | 956 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 957 | { |
df133c21 JB |
958 | struct device *dev = &sdev->sdev_gendev; |
959 | ||
860dc736 JB |
960 | if (sdev->is_visible) { |
961 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) | |
962 | return; | |
1da177e4 | 963 | |
860dc736 JB |
964 | bsg_unregister_queue(sdev->request_queue); |
965 | device_unregister(&sdev->sdev_dev); | |
966 | transport_remove_device(dev); | |
967 | device_del(dev); | |
968 | } else | |
969 | put_device(&sdev->sdev_dev); | |
b485462a BVA |
970 | |
971 | /* | |
972 | * Stop accepting new requests and wait until all queuecommand() and | |
973 | * scsi_run_queue() invocations have finished before tearing down the | |
974 | * device. | |
975 | */ | |
1da177e4 | 976 | scsi_device_set_state(sdev, SDEV_DEL); |
b485462a BVA |
977 | blk_cleanup_queue(sdev->request_queue); |
978 | cancel_work_sync(&sdev->requeue_work); | |
979 | ||
1da177e4 LT |
980 | if (sdev->host->hostt->slave_destroy) |
981 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 | 982 | transport_destroy_device(dev); |
86cbfb56 | 983 | |
df133c21 | 984 | put_device(dev); |
903f4fed AS |
985 | } |
986 | ||
987 | /** | |
988 | * scsi_remove_device - unregister a device from the scsi bus | |
989 | * @sdev: scsi_device to unregister | |
990 | **/ | |
991 | void scsi_remove_device(struct scsi_device *sdev) | |
992 | { | |
54195002 AS |
993 | struct Scsi_Host *shost = sdev->host; |
994 | ||
0b950672 | 995 | mutex_lock(&shost->scan_mutex); |
903f4fed | 996 | __scsi_remove_device(sdev); |
0b950672 | 997 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
998 | } |
999 | EXPORT_SYMBOL(scsi_remove_device); | |
1000 | ||
44818efb | 1001 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
1002 | { |
1003 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
1004 | unsigned long flags; | |
a64358db | 1005 | struct scsi_device *sdev; |
1da177e4 LT |
1006 | |
1007 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db AS |
1008 | restart: |
1009 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 1010 | if (sdev->channel != starget->channel || |
a64358db | 1011 | sdev->id != starget->id || |
546ae796 | 1012 | scsi_device_get(sdev)) |
1da177e4 LT |
1013 | continue; |
1014 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1015 | scsi_remove_device(sdev); | |
546ae796 | 1016 | scsi_device_put(sdev); |
1da177e4 | 1017 | spin_lock_irqsave(shost->host_lock, flags); |
a64358db | 1018 | goto restart; |
1da177e4 LT |
1019 | } |
1020 | spin_unlock_irqrestore(shost->host_lock, flags); | |
20b1e674 | 1021 | } |
1022 | ||
1da177e4 LT |
1023 | /** |
1024 | * scsi_remove_target - try to remove a target and all its devices | |
1025 | * @dev: generic starget or parent of generic stargets to be removed | |
1026 | * | |
1027 | * Note: This is slightly racy. It is possible that if the user | |
1028 | * requests the addition of another device then the target won't be | |
1029 | * removed. | |
1030 | */ | |
1031 | void scsi_remove_target(struct device *dev) | |
1032 | { | |
3b661a92 DW |
1033 | struct Scsi_Host *shost = dev_to_shost(dev->parent); |
1034 | struct scsi_target *starget, *found; | |
1035 | unsigned long flags; | |
1036 | ||
1037 | restart: | |
1038 | found = NULL; | |
1039 | spin_lock_irqsave(shost->host_lock, flags); | |
1040 | list_for_each_entry(starget, &shost->__targets, siblings) { | |
1041 | if (starget->state == STARGET_DEL) | |
1042 | continue; | |
1043 | if (starget->dev.parent == dev || &starget->dev == dev) { | |
1044 | found = starget; | |
1045 | found->reap_ref++; | |
1046 | break; | |
1047 | } | |
1da177e4 | 1048 | } |
3b661a92 | 1049 | spin_unlock_irqrestore(shost->host_lock, flags); |
1da177e4 | 1050 | |
3b661a92 DW |
1051 | if (found) { |
1052 | __scsi_remove_target(found); | |
1053 | scsi_target_reap(found); | |
1054 | /* in the case where @dev has multiple starget children, | |
1055 | * continue removing. | |
1056 | * | |
1057 | * FIXME: does such a case exist? | |
1058 | */ | |
1059 | goto restart; | |
1060 | } | |
1da177e4 LT |
1061 | } |
1062 | EXPORT_SYMBOL(scsi_remove_target); | |
1063 | ||
1064 | int scsi_register_driver(struct device_driver *drv) | |
1065 | { | |
1066 | drv->bus = &scsi_bus_type; | |
1067 | ||
1068 | return driver_register(drv); | |
1069 | } | |
1070 | EXPORT_SYMBOL(scsi_register_driver); | |
1071 | ||
1072 | int scsi_register_interface(struct class_interface *intf) | |
1073 | { | |
1074 | intf->class = &sdev_class; | |
1075 | ||
1076 | return class_interface_register(intf); | |
1077 | } | |
1078 | EXPORT_SYMBOL(scsi_register_interface); | |
1079 | ||
1da177e4 LT |
1080 | /** |
1081 | * scsi_sysfs_add_host - add scsi host to subsystem | |
1082 | * @shost: scsi host struct to add to subsystem | |
1da177e4 LT |
1083 | **/ |
1084 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
1085 | { | |
1086 | int error, i; | |
1087 | ||
f7120a4f | 1088 | /* add host specific attributes */ |
1da177e4 LT |
1089 | if (shost->hostt->shost_attrs) { |
1090 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
ee959b00 | 1091 | error = device_create_file(&shost->shost_dev, |
f7120a4f | 1092 | shost->hostt->shost_attrs[i]); |
1da177e4 LT |
1093 | if (error) |
1094 | return error; | |
1095 | } | |
1096 | } | |
1097 | ||
1098 | transport_register_device(&shost->shost_gendev); | |
d52b3815 | 1099 | transport_configure_device(&shost->shost_gendev); |
1da177e4 LT |
1100 | return 0; |
1101 | } | |
1102 | ||
bfd12944 KS |
1103 | static struct device_type scsi_dev_type = { |
1104 | .name = "scsi_device", | |
1105 | .release = scsi_device_dev_release, | |
1106 | .groups = scsi_sdev_attr_groups, | |
1107 | }; | |
1108 | ||
1da177e4 LT |
1109 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
1110 | { | |
1111 | unsigned long flags; | |
1112 | struct Scsi_Host *shost = sdev->host; | |
1113 | struct scsi_target *starget = sdev->sdev_target; | |
1114 | ||
1115 | device_initialize(&sdev->sdev_gendev); | |
1116 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 1117 | sdev->sdev_gendev.type = &scsi_dev_type; |
71610f55 KS |
1118 | dev_set_name(&sdev->sdev_gendev, "%d:%d:%d:%d", |
1119 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
1120 | ||
ee959b00 | 1121 | device_initialize(&sdev->sdev_dev); |
37e6ba00 | 1122 | sdev->sdev_dev.parent = get_device(&sdev->sdev_gendev); |
ee959b00 | 1123 | sdev->sdev_dev.class = &sdev_class; |
71610f55 KS |
1124 | dev_set_name(&sdev->sdev_dev, "%d:%d:%d:%d", |
1125 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 1126 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
1127 | transport_setup_device(&sdev->sdev_gendev); |
1128 | spin_lock_irqsave(shost->host_lock, flags); | |
1129 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
1130 | list_add_tail(&sdev->siblings, &shost->__devices); | |
1131 | spin_unlock_irqrestore(shost->host_lock, flags); | |
1132 | } | |
1133 | ||
1134 | int scsi_is_sdev_device(const struct device *dev) | |
1135 | { | |
13ba9bcb | 1136 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
1137 | } |
1138 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
1139 | ||
1140 | /* A blank transport template that is used in drivers that don't | |
1141 | * yet implement Transport Attributes */ | |
1142 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |