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Commit | Line | Data |
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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 LT |
9 | #include <linux/module.h> |
10 | #include <linux/init.h> | |
11 | #include <linux/blkdev.h> | |
12 | #include <linux/device.h> | |
13 | ||
14 | #include <scsi/scsi.h> | |
15 | #include <scsi/scsi_device.h> | |
16 | #include <scsi/scsi_host.h> | |
17 | #include <scsi/scsi_tcq.h> | |
18 | #include <scsi/scsi_transport.h> | |
44818efb | 19 | #include <scsi/scsi_driver.h> |
1da177e4 LT |
20 | |
21 | #include "scsi_priv.h" | |
22 | #include "scsi_logging.h" | |
23 | ||
0ad78200 | 24 | static const struct { |
1da177e4 LT |
25 | enum scsi_device_state value; |
26 | char *name; | |
27 | } sdev_states[] = { | |
28 | { SDEV_CREATED, "created" }, | |
29 | { SDEV_RUNNING, "running" }, | |
30 | { SDEV_CANCEL, "cancel" }, | |
31 | { SDEV_DEL, "deleted" }, | |
32 | { SDEV_QUIESCE, "quiesce" }, | |
33 | { SDEV_OFFLINE, "offline" }, | |
34 | { SDEV_BLOCK, "blocked" }, | |
35 | }; | |
36 | ||
37 | const char *scsi_device_state_name(enum scsi_device_state state) | |
38 | { | |
39 | int i; | |
40 | char *name = NULL; | |
41 | ||
6391a113 | 42 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
43 | if (sdev_states[i].value == state) { |
44 | name = sdev_states[i].name; | |
45 | break; | |
46 | } | |
47 | } | |
48 | return name; | |
49 | } | |
50 | ||
0ad78200 | 51 | static const struct { |
d3301874 MA |
52 | enum scsi_host_state value; |
53 | char *name; | |
54 | } shost_states[] = { | |
55 | { SHOST_CREATED, "created" }, | |
56 | { SHOST_RUNNING, "running" }, | |
57 | { SHOST_CANCEL, "cancel" }, | |
58 | { SHOST_DEL, "deleted" }, | |
59 | { SHOST_RECOVERY, "recovery" }, | |
939647ee JB |
60 | { SHOST_CANCEL_RECOVERY, "cancel/recovery" }, |
61 | { SHOST_DEL_RECOVERY, "deleted/recovery", }, | |
d3301874 MA |
62 | }; |
63 | const char *scsi_host_state_name(enum scsi_host_state state) | |
64 | { | |
65 | int i; | |
66 | char *name = NULL; | |
67 | ||
6391a113 | 68 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
69 | if (shost_states[i].value == state) { |
70 | name = shost_states[i].name; | |
71 | break; | |
72 | } | |
73 | } | |
74 | return name; | |
75 | } | |
76 | ||
1da177e4 LT |
77 | static int check_set(unsigned int *val, char *src) |
78 | { | |
79 | char *last; | |
80 | ||
81 | if (strncmp(src, "-", 20) == 0) { | |
82 | *val = SCAN_WILD_CARD; | |
83 | } else { | |
84 | /* | |
85 | * Doesn't check for int overflow | |
86 | */ | |
87 | *val = simple_strtoul(src, &last, 0); | |
88 | if (*last != '\0') | |
89 | return 1; | |
90 | } | |
91 | return 0; | |
92 | } | |
93 | ||
94 | static int scsi_scan(struct Scsi_Host *shost, const char *str) | |
95 | { | |
96 | char s1[15], s2[15], s3[15], junk; | |
97 | unsigned int channel, id, lun; | |
98 | int res; | |
99 | ||
100 | res = sscanf(str, "%10s %10s %10s %c", s1, s2, s3, &junk); | |
101 | if (res != 3) | |
102 | return -EINVAL; | |
103 | if (check_set(&channel, s1)) | |
104 | return -EINVAL; | |
105 | if (check_set(&id, s2)) | |
106 | return -EINVAL; | |
107 | if (check_set(&lun, s3)) | |
108 | return -EINVAL; | |
e02f3f59 CH |
109 | if (shost->transportt->user_scan) |
110 | res = shost->transportt->user_scan(shost, channel, id, lun); | |
111 | else | |
112 | res = scsi_scan_host_selected(shost, channel, id, lun, 1); | |
1da177e4 LT |
113 | return res; |
114 | } | |
115 | ||
116 | /* | |
117 | * shost_show_function: macro to create an attr function that can be used to | |
118 | * show a non-bit field. | |
119 | */ | |
120 | #define shost_show_function(name, field, format_string) \ | |
121 | static ssize_t \ | |
122 | show_##name (struct class_device *class_dev, char *buf) \ | |
123 | { \ | |
124 | struct Scsi_Host *shost = class_to_shost(class_dev); \ | |
125 | return snprintf (buf, 20, format_string, shost->field); \ | |
126 | } | |
127 | ||
128 | /* | |
129 | * shost_rd_attr: macro to create a function and attribute variable for a | |
130 | * read only field. | |
131 | */ | |
132 | #define shost_rd_attr2(name, field, format_string) \ | |
133 | shost_show_function(name, field, format_string) \ | |
134 | static CLASS_DEVICE_ATTR(name, S_IRUGO, show_##name, NULL); | |
135 | ||
136 | #define shost_rd_attr(field, format_string) \ | |
137 | shost_rd_attr2(field, field, format_string) | |
138 | ||
139 | /* | |
140 | * Create the actual show/store functions and data structures. | |
141 | */ | |
142 | ||
143 | static ssize_t store_scan(struct class_device *class_dev, const char *buf, | |
144 | size_t count) | |
145 | { | |
146 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
147 | int res; | |
148 | ||
149 | res = scsi_scan(shost, buf); | |
150 | if (res == 0) | |
151 | res = count; | |
152 | return res; | |
153 | }; | |
154 | static CLASS_DEVICE_ATTR(scan, S_IWUSR, NULL, store_scan); | |
155 | ||
d3301874 MA |
156 | static ssize_t |
157 | store_shost_state(struct class_device *class_dev, const char *buf, size_t count) | |
158 | { | |
159 | int i; | |
160 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
161 | enum scsi_host_state state = 0; | |
162 | ||
6391a113 | 163 | for (i = 0; i < ARRAY_SIZE(shost_states); i++) { |
d3301874 MA |
164 | const int len = strlen(shost_states[i].name); |
165 | if (strncmp(shost_states[i].name, buf, len) == 0 && | |
166 | buf[len] == '\n') { | |
167 | state = shost_states[i].value; | |
168 | break; | |
169 | } | |
170 | } | |
171 | if (!state) | |
172 | return -EINVAL; | |
173 | ||
174 | if (scsi_host_set_state(shost, state)) | |
175 | return -EINVAL; | |
176 | return count; | |
177 | } | |
178 | ||
179 | static ssize_t | |
180 | show_shost_state(struct class_device *class_dev, char *buf) | |
181 | { | |
182 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
183 | const char *name = scsi_host_state_name(shost->shost_state); | |
184 | ||
185 | if (!name) | |
186 | return -EINVAL; | |
187 | ||
188 | return snprintf(buf, 20, "%s\n", name); | |
189 | } | |
190 | ||
191 | static CLASS_DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_shost_state, store_shost_state); | |
192 | ||
5dc2b89e FT |
193 | static ssize_t |
194 | show_shost_mode(unsigned int mode, char *buf) | |
195 | { | |
196 | ssize_t len = 0; | |
197 | ||
198 | if (mode & MODE_INITIATOR) | |
199 | len = sprintf(buf, "%s", "Initiator"); | |
200 | ||
201 | if (mode & MODE_TARGET) | |
202 | len += sprintf(buf + len, "%s%s", len ? ", " : "", "Target"); | |
203 | ||
204 | len += sprintf(buf + len, "\n"); | |
205 | ||
206 | return len; | |
207 | } | |
208 | ||
209 | static ssize_t show_shost_supported_mode(struct class_device *class_dev, char *buf) | |
210 | { | |
211 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
212 | ||
213 | if (shost->hostt->supported_mode == MODE_UNKNOWN) | |
214 | return snprintf(buf, 20, "unknown\n"); | |
215 | else | |
216 | return show_shost_mode(shost->hostt->supported_mode, buf); | |
217 | } | |
218 | ||
219 | static CLASS_DEVICE_ATTR(supported_mode, S_IRUGO | S_IWUSR, show_shost_supported_mode, NULL); | |
220 | ||
221 | static ssize_t show_shost_active_mode(struct class_device *class_dev, char *buf) | |
222 | { | |
223 | struct Scsi_Host *shost = class_to_shost(class_dev); | |
224 | ||
225 | if (shost->active_mode == MODE_UNKNOWN) | |
226 | return snprintf(buf, 20, "unknown\n"); | |
227 | else | |
228 | return show_shost_mode(shost->active_mode, buf); | |
229 | } | |
230 | ||
231 | static CLASS_DEVICE_ATTR(active_mode, S_IRUGO | S_IWUSR, show_shost_active_mode, NULL); | |
232 | ||
1da177e4 LT |
233 | shost_rd_attr(unique_id, "%u\n"); |
234 | shost_rd_attr(host_busy, "%hu\n"); | |
235 | shost_rd_attr(cmd_per_lun, "%hd\n"); | |
ed632da8 | 236 | shost_rd_attr(can_queue, "%hd\n"); |
1da177e4 LT |
237 | shost_rd_attr(sg_tablesize, "%hu\n"); |
238 | shost_rd_attr(unchecked_isa_dma, "%d\n"); | |
239 | shost_rd_attr2(proc_name, hostt->proc_name, "%s\n"); | |
240 | ||
241 | static struct class_device_attribute *scsi_sysfs_shost_attrs[] = { | |
242 | &class_device_attr_unique_id, | |
243 | &class_device_attr_host_busy, | |
244 | &class_device_attr_cmd_per_lun, | |
ed632da8 | 245 | &class_device_attr_can_queue, |
1da177e4 LT |
246 | &class_device_attr_sg_tablesize, |
247 | &class_device_attr_unchecked_isa_dma, | |
248 | &class_device_attr_proc_name, | |
249 | &class_device_attr_scan, | |
d3301874 | 250 | &class_device_attr_state, |
5dc2b89e FT |
251 | &class_device_attr_supported_mode, |
252 | &class_device_attr_active_mode, | |
1da177e4 LT |
253 | NULL |
254 | }; | |
255 | ||
256 | static void scsi_device_cls_release(struct class_device *class_dev) | |
257 | { | |
258 | struct scsi_device *sdev; | |
259 | ||
260 | sdev = class_to_sdev(class_dev); | |
261 | put_device(&sdev->sdev_gendev); | |
262 | } | |
263 | ||
65f27f38 | 264 | static void scsi_device_dev_release_usercontext(struct work_struct *work) |
1da177e4 LT |
265 | { |
266 | struct scsi_device *sdev; | |
267 | struct device *parent; | |
268 | struct scsi_target *starget; | |
269 | unsigned long flags; | |
270 | ||
65f27f38 DH |
271 | sdev = container_of(work, struct scsi_device, ew.work); |
272 | ||
273 | parent = sdev->sdev_gendev.parent; | |
1da177e4 LT |
274 | starget = to_scsi_target(parent); |
275 | ||
276 | spin_lock_irqsave(sdev->host->host_lock, flags); | |
277 | starget->reap_ref++; | |
278 | list_del(&sdev->siblings); | |
279 | list_del(&sdev->same_target_siblings); | |
280 | list_del(&sdev->starved_entry); | |
281 | spin_unlock_irqrestore(sdev->host->host_lock, flags); | |
282 | ||
283 | if (sdev->request_queue) { | |
284 | sdev->request_queue->queuedata = NULL; | |
65110b21 | 285 | /* user context needed to free queue */ |
1da177e4 | 286 | scsi_free_queue(sdev->request_queue); |
c2a9331c JB |
287 | /* temporary expedient, try to catch use of queue lock |
288 | * after free of sdev */ | |
289 | sdev->request_queue = NULL; | |
1da177e4 LT |
290 | } |
291 | ||
292 | scsi_target_reap(scsi_target(sdev)); | |
293 | ||
294 | kfree(sdev->inquiry); | |
295 | kfree(sdev); | |
296 | ||
297 | if (parent) | |
298 | put_device(parent); | |
299 | } | |
300 | ||
65110b21 JB |
301 | static void scsi_device_dev_release(struct device *dev) |
302 | { | |
ffedb452 | 303 | struct scsi_device *sdp = to_scsi_device(dev); |
65f27f38 | 304 | execute_in_process_context(scsi_device_dev_release_usercontext, |
ffedb452 | 305 | &sdp->ew); |
65110b21 JB |
306 | } |
307 | ||
52c1da39 | 308 | static struct class sdev_class = { |
1da177e4 LT |
309 | .name = "scsi_device", |
310 | .release = scsi_device_cls_release, | |
311 | }; | |
312 | ||
313 | /* all probing is done in the individual ->probe routines */ | |
314 | static int scsi_bus_match(struct device *dev, struct device_driver *gendrv) | |
315 | { | |
316 | struct scsi_device *sdp = to_scsi_device(dev); | |
317 | if (sdp->no_uld_attach) | |
318 | return 0; | |
319 | return (sdp->inq_periph_qual == SCSI_INQ_PQ_CON)? 1: 0; | |
320 | } | |
321 | ||
7eff2e7a | 322 | static int scsi_bus_uevent(struct device *dev, struct kobj_uevent_env *env) |
d7b8bcb0 MT |
323 | { |
324 | struct scsi_device *sdev = to_scsi_device(dev); | |
d7b8bcb0 | 325 | |
7eff2e7a | 326 | add_uevent_var(env, "MODALIAS=" SCSI_DEVICE_MODALIAS_FMT, sdev->type); |
d7b8bcb0 MT |
327 | return 0; |
328 | } | |
329 | ||
9b847548 JA |
330 | static int scsi_bus_suspend(struct device * dev, pm_message_t state) |
331 | { | |
c3c94c5a | 332 | struct device_driver *drv = dev->driver; |
9b847548 | 333 | struct scsi_device *sdev = to_scsi_device(dev); |
9b847548 JA |
334 | int err; |
335 | ||
336 | err = scsi_device_quiesce(sdev); | |
337 | if (err) | |
338 | return err; | |
339 | ||
c3c94c5a TH |
340 | if (drv && drv->suspend) { |
341 | err = drv->suspend(dev, state); | |
342 | if (err) | |
343 | return err; | |
344 | } | |
345 | ||
c3c94c5a | 346 | return 0; |
9b847548 JA |
347 | } |
348 | ||
349 | static int scsi_bus_resume(struct device * dev) | |
350 | { | |
c3c94c5a | 351 | struct device_driver *drv = dev->driver; |
9b847548 | 352 | struct scsi_device *sdev = to_scsi_device(dev); |
1dfcda06 | 353 | int err = 0; |
9b847548 | 354 | |
c3c94c5a | 355 | if (drv && drv->resume) |
1dfcda06 | 356 | err = drv->resume(dev); |
c3c94c5a | 357 | |
9b847548 | 358 | scsi_device_resume(sdev); |
c3c94c5a | 359 | |
1dfcda06 | 360 | return err; |
9b847548 JA |
361 | } |
362 | ||
1da177e4 LT |
363 | struct bus_type scsi_bus_type = { |
364 | .name = "scsi", | |
365 | .match = scsi_bus_match, | |
d7b8bcb0 | 366 | .uevent = scsi_bus_uevent, |
9b847548 JA |
367 | .suspend = scsi_bus_suspend, |
368 | .resume = scsi_bus_resume, | |
1da177e4 LT |
369 | }; |
370 | ||
371 | int scsi_sysfs_register(void) | |
372 | { | |
373 | int error; | |
374 | ||
375 | error = bus_register(&scsi_bus_type); | |
376 | if (!error) { | |
377 | error = class_register(&sdev_class); | |
378 | if (error) | |
379 | bus_unregister(&scsi_bus_type); | |
380 | } | |
381 | ||
382 | return error; | |
383 | } | |
384 | ||
385 | void scsi_sysfs_unregister(void) | |
386 | { | |
387 | class_unregister(&sdev_class); | |
388 | bus_unregister(&scsi_bus_type); | |
389 | } | |
390 | ||
391 | /* | |
392 | * sdev_show_function: macro to create an attr function that can be used to | |
393 | * show a non-bit field. | |
394 | */ | |
395 | #define sdev_show_function(field, format_string) \ | |
396 | static ssize_t \ | |
10523b3b | 397 | sdev_show_##field (struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
398 | { \ |
399 | struct scsi_device *sdev; \ | |
400 | sdev = to_scsi_device(dev); \ | |
401 | return snprintf (buf, 20, format_string, sdev->field); \ | |
402 | } \ | |
403 | ||
404 | /* | |
405 | * sdev_rd_attr: macro to create a function and attribute variable for a | |
406 | * read only field. | |
407 | */ | |
408 | #define sdev_rd_attr(field, format_string) \ | |
409 | sdev_show_function(field, format_string) \ | |
410 | static DEVICE_ATTR(field, S_IRUGO, sdev_show_##field, NULL); | |
411 | ||
412 | ||
413 | /* | |
414 | * sdev_rd_attr: create a function and attribute variable for a | |
415 | * read/write field. | |
416 | */ | |
417 | #define sdev_rw_attr(field, format_string) \ | |
418 | sdev_show_function(field, format_string) \ | |
419 | \ | |
420 | static ssize_t \ | |
10523b3b | 421 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
422 | { \ |
423 | struct scsi_device *sdev; \ | |
424 | sdev = to_scsi_device(dev); \ | |
425 | snscanf (buf, 20, format_string, &sdev->field); \ | |
426 | return count; \ | |
427 | } \ | |
428 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
429 | ||
430 | /* Currently we don't export bit fields, but we might in future, | |
431 | * so leave this code in */ | |
432 | #if 0 | |
433 | /* | |
434 | * sdev_rd_attr: create a function and attribute variable for a | |
435 | * read/write bit field. | |
436 | */ | |
437 | #define sdev_rw_attr_bit(field) \ | |
438 | sdev_show_function(field, "%d\n") \ | |
439 | \ | |
440 | static ssize_t \ | |
10523b3b | 441 | sdev_store_##field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) \ |
1da177e4 LT |
442 | { \ |
443 | int ret; \ | |
444 | struct scsi_device *sdev; \ | |
445 | ret = scsi_sdev_check_buf_bit(buf); \ | |
446 | if (ret >= 0) { \ | |
447 | sdev = to_scsi_device(dev); \ | |
448 | sdev->field = ret; \ | |
449 | ret = count; \ | |
450 | } \ | |
451 | return ret; \ | |
452 | } \ | |
453 | static DEVICE_ATTR(field, S_IRUGO | S_IWUSR, sdev_show_##field, sdev_store_##field); | |
454 | ||
455 | /* | |
456 | * scsi_sdev_check_buf_bit: return 0 if buf is "0", return 1 if buf is "1", | |
457 | * else return -EINVAL. | |
458 | */ | |
459 | static int scsi_sdev_check_buf_bit(const char *buf) | |
460 | { | |
461 | if ((buf[1] == '\0') || ((buf[1] == '\n') && (buf[2] == '\0'))) { | |
462 | if (buf[0] == '1') | |
463 | return 1; | |
464 | else if (buf[0] == '0') | |
465 | return 0; | |
466 | else | |
467 | return -EINVAL; | |
468 | } else | |
469 | return -EINVAL; | |
470 | } | |
471 | #endif | |
472 | /* | |
473 | * Create the actual show/store functions and data structures. | |
474 | */ | |
475 | sdev_rd_attr (device_blocked, "%d\n"); | |
476 | sdev_rd_attr (queue_depth, "%d\n"); | |
477 | sdev_rd_attr (type, "%d\n"); | |
478 | sdev_rd_attr (scsi_level, "%d\n"); | |
479 | sdev_rd_attr (vendor, "%.8s\n"); | |
480 | sdev_rd_attr (model, "%.16s\n"); | |
481 | sdev_rd_attr (rev, "%.4s\n"); | |
482 | ||
483 | static ssize_t | |
10523b3b | 484 | sdev_show_timeout (struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
485 | { |
486 | struct scsi_device *sdev; | |
487 | sdev = to_scsi_device(dev); | |
488 | return snprintf (buf, 20, "%d\n", sdev->timeout / HZ); | |
489 | } | |
490 | ||
491 | static ssize_t | |
10523b3b | 492 | sdev_store_timeout (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
493 | { |
494 | struct scsi_device *sdev; | |
495 | int timeout; | |
496 | sdev = to_scsi_device(dev); | |
497 | sscanf (buf, "%d\n", &timeout); | |
498 | sdev->timeout = timeout * HZ; | |
499 | return count; | |
500 | } | |
501 | static DEVICE_ATTR(timeout, S_IRUGO | S_IWUSR, sdev_show_timeout, sdev_store_timeout); | |
502 | ||
503 | static ssize_t | |
10523b3b | 504 | store_rescan_field (struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
505 | { |
506 | scsi_rescan_device(dev); | |
507 | return count; | |
508 | } | |
509 | static DEVICE_ATTR(rescan, S_IWUSR, NULL, store_rescan_field); | |
510 | ||
d9a9cdfb AS |
511 | static void sdev_store_delete_callback(struct device *dev) |
512 | { | |
513 | scsi_remove_device(to_scsi_device(dev)); | |
514 | } | |
515 | ||
10523b3b | 516 | static ssize_t sdev_store_delete(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
517 | size_t count) |
518 | { | |
d9a9cdfb AS |
519 | int rc; |
520 | ||
521 | /* An attribute cannot be unregistered by one of its own methods, | |
522 | * so we have to use this roundabout approach. | |
523 | */ | |
524 | rc = device_schedule_callback(dev, sdev_store_delete_callback); | |
525 | if (rc) | |
526 | count = rc; | |
1da177e4 LT |
527 | return count; |
528 | }; | |
529 | static DEVICE_ATTR(delete, S_IWUSR, NULL, sdev_store_delete); | |
530 | ||
531 | static ssize_t | |
10523b3b | 532 | store_state_field(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) |
1da177e4 LT |
533 | { |
534 | int i; | |
535 | struct scsi_device *sdev = to_scsi_device(dev); | |
536 | enum scsi_device_state state = 0; | |
537 | ||
6391a113 | 538 | for (i = 0; i < ARRAY_SIZE(sdev_states); i++) { |
1da177e4 LT |
539 | const int len = strlen(sdev_states[i].name); |
540 | if (strncmp(sdev_states[i].name, buf, len) == 0 && | |
541 | buf[len] == '\n') { | |
542 | state = sdev_states[i].value; | |
543 | break; | |
544 | } | |
545 | } | |
546 | if (!state) | |
547 | return -EINVAL; | |
548 | ||
549 | if (scsi_device_set_state(sdev, state)) | |
550 | return -EINVAL; | |
551 | return count; | |
552 | } | |
553 | ||
554 | static ssize_t | |
10523b3b | 555 | show_state_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
556 | { |
557 | struct scsi_device *sdev = to_scsi_device(dev); | |
558 | const char *name = scsi_device_state_name(sdev->sdev_state); | |
559 | ||
560 | if (!name) | |
561 | return -EINVAL; | |
562 | ||
563 | return snprintf(buf, 20, "%s\n", name); | |
564 | } | |
565 | ||
566 | static DEVICE_ATTR(state, S_IRUGO | S_IWUSR, show_state_field, store_state_field); | |
567 | ||
568 | static ssize_t | |
10523b3b | 569 | show_queue_type_field(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
570 | { |
571 | struct scsi_device *sdev = to_scsi_device(dev); | |
572 | const char *name = "none"; | |
573 | ||
574 | if (sdev->ordered_tags) | |
575 | name = "ordered"; | |
576 | else if (sdev->simple_tags) | |
577 | name = "simple"; | |
578 | ||
579 | return snprintf(buf, 20, "%s\n", name); | |
580 | } | |
581 | ||
582 | static DEVICE_ATTR(queue_type, S_IRUGO, show_queue_type_field, NULL); | |
583 | ||
584 | static ssize_t | |
10523b3b | 585 | show_iostat_counterbits(struct device *dev, struct device_attribute *attr, char *buf) |
1da177e4 LT |
586 | { |
587 | return snprintf(buf, 20, "%d\n", (int)sizeof(atomic_t) * 8); | |
588 | } | |
589 | ||
590 | static DEVICE_ATTR(iocounterbits, S_IRUGO, show_iostat_counterbits, NULL); | |
591 | ||
592 | #define show_sdev_iostat(field) \ | |
593 | static ssize_t \ | |
10523b3b | 594 | show_iostat_##field(struct device *dev, struct device_attribute *attr, char *buf) \ |
1da177e4 LT |
595 | { \ |
596 | struct scsi_device *sdev = to_scsi_device(dev); \ | |
597 | unsigned long long count = atomic_read(&sdev->field); \ | |
598 | return snprintf(buf, 20, "0x%llx\n", count); \ | |
599 | } \ | |
600 | static DEVICE_ATTR(field, S_IRUGO, show_iostat_##field, NULL) | |
601 | ||
602 | show_sdev_iostat(iorequest_cnt); | |
603 | show_sdev_iostat(iodone_cnt); | |
604 | show_sdev_iostat(ioerr_cnt); | |
605 | ||
d7b8bcb0 MT |
606 | static ssize_t |
607 | sdev_show_modalias(struct device *dev, struct device_attribute *attr, char *buf) | |
608 | { | |
609 | struct scsi_device *sdev; | |
610 | sdev = to_scsi_device(dev); | |
611 | return snprintf (buf, 20, SCSI_DEVICE_MODALIAS_FMT "\n", sdev->type); | |
612 | } | |
613 | static DEVICE_ATTR(modalias, S_IRUGO, sdev_show_modalias, NULL); | |
1da177e4 LT |
614 | |
615 | /* Default template for device attributes. May NOT be modified */ | |
bfd12944 KS |
616 | static struct attribute *scsi_sdev_attrs[] = { |
617 | &dev_attr_device_blocked.attr, | |
618 | &dev_attr_type.attr, | |
619 | &dev_attr_scsi_level.attr, | |
620 | &dev_attr_vendor.attr, | |
621 | &dev_attr_model.attr, | |
622 | &dev_attr_rev.attr, | |
623 | &dev_attr_rescan.attr, | |
624 | &dev_attr_delete.attr, | |
625 | &dev_attr_state.attr, | |
626 | &dev_attr_timeout.attr, | |
627 | &dev_attr_iocounterbits.attr, | |
628 | &dev_attr_iorequest_cnt.attr, | |
629 | &dev_attr_iodone_cnt.attr, | |
630 | &dev_attr_ioerr_cnt.attr, | |
631 | &dev_attr_modalias.attr, | |
632 | NULL | |
633 | }; | |
634 | ||
635 | static struct attribute_group scsi_sdev_attr_group = { | |
636 | .attrs = scsi_sdev_attrs, | |
637 | }; | |
638 | ||
639 | static struct attribute_group *scsi_sdev_attr_groups[] = { | |
640 | &scsi_sdev_attr_group, | |
1da177e4 LT |
641 | NULL |
642 | }; | |
643 | ||
10523b3b | 644 | static ssize_t sdev_store_queue_depth_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
645 | size_t count) |
646 | { | |
647 | int depth, retval; | |
648 | struct scsi_device *sdev = to_scsi_device(dev); | |
649 | struct scsi_host_template *sht = sdev->host->hostt; | |
650 | ||
651 | if (!sht->change_queue_depth) | |
652 | return -EINVAL; | |
653 | ||
654 | depth = simple_strtoul(buf, NULL, 0); | |
655 | ||
656 | if (depth < 1) | |
657 | return -EINVAL; | |
658 | ||
659 | retval = sht->change_queue_depth(sdev, depth); | |
660 | if (retval < 0) | |
661 | return retval; | |
662 | ||
663 | return count; | |
664 | } | |
665 | ||
666 | static struct device_attribute sdev_attr_queue_depth_rw = | |
667 | __ATTR(queue_depth, S_IRUGO | S_IWUSR, sdev_show_queue_depth, | |
668 | sdev_store_queue_depth_rw); | |
669 | ||
10523b3b | 670 | static ssize_t sdev_store_queue_type_rw(struct device *dev, struct device_attribute *attr, const char *buf, |
1da177e4 LT |
671 | size_t count) |
672 | { | |
673 | struct scsi_device *sdev = to_scsi_device(dev); | |
674 | struct scsi_host_template *sht = sdev->host->hostt; | |
675 | int tag_type = 0, retval; | |
676 | int prev_tag_type = scsi_get_tag_type(sdev); | |
677 | ||
678 | if (!sdev->tagged_supported || !sht->change_queue_type) | |
679 | return -EINVAL; | |
680 | ||
681 | if (strncmp(buf, "ordered", 7) == 0) | |
682 | tag_type = MSG_ORDERED_TAG; | |
683 | else if (strncmp(buf, "simple", 6) == 0) | |
684 | tag_type = MSG_SIMPLE_TAG; | |
685 | else if (strncmp(buf, "none", 4) != 0) | |
686 | return -EINVAL; | |
687 | ||
688 | if (tag_type == prev_tag_type) | |
689 | return count; | |
690 | ||
691 | retval = sht->change_queue_type(sdev, tag_type); | |
692 | if (retval < 0) | |
693 | return retval; | |
694 | ||
695 | return count; | |
696 | } | |
697 | ||
698 | static struct device_attribute sdev_attr_queue_type_rw = | |
699 | __ATTR(queue_type, S_IRUGO | S_IWUSR, show_queue_type_field, | |
700 | sdev_store_queue_type_rw); | |
701 | ||
1da177e4 LT |
702 | /** |
703 | * scsi_sysfs_add_sdev - add scsi device to sysfs | |
704 | * @sdev: scsi_device to add | |
705 | * | |
706 | * Return value: | |
707 | * 0 on Success / non-zero on Failure | |
708 | **/ | |
709 | int scsi_sysfs_add_sdev(struct scsi_device *sdev) | |
710 | { | |
711 | int error, i; | |
80ed71ce | 712 | struct request_queue *rq = sdev->request_queue; |
1da177e4 LT |
713 | |
714 | if ((error = scsi_device_set_state(sdev, SDEV_RUNNING)) != 0) | |
715 | return error; | |
716 | ||
717 | error = device_add(&sdev->sdev_gendev); | |
718 | if (error) { | |
719 | put_device(sdev->sdev_gendev.parent); | |
720 | printk(KERN_INFO "error 1\n"); | |
721 | return error; | |
722 | } | |
723 | error = class_device_add(&sdev->sdev_classdev); | |
724 | if (error) { | |
725 | printk(KERN_INFO "error 2\n"); | |
726 | goto clean_device; | |
727 | } | |
728 | ||
729 | /* take a reference for the sdev_classdev; this is | |
730 | * released by the sdev_class .release */ | |
731 | get_device(&sdev->sdev_gendev); | |
80ed71ce | 732 | |
bfd12944 KS |
733 | /* create queue files, which may be writable, depending on the host */ |
734 | if (sdev->host->hostt->change_queue_depth) | |
735 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_depth_rw); | |
736 | else | |
737 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_depth); | |
738 | if (error) { | |
739 | __scsi_remove_device(sdev); | |
740 | goto out; | |
741 | } | |
742 | if (sdev->host->hostt->change_queue_type) | |
743 | error = device_create_file(&sdev->sdev_gendev, &sdev_attr_queue_type_rw); | |
744 | else | |
745 | error = device_create_file(&sdev->sdev_gendev, &dev_attr_queue_type); | |
746 | if (error) { | |
747 | __scsi_remove_device(sdev); | |
748 | goto out; | |
749 | } | |
750 | ||
39dca558 | 751 | error = bsg_register_queue(rq, &sdev->sdev_gendev, NULL); |
80ed71ce JB |
752 | |
753 | if (error) | |
754 | sdev_printk(KERN_INFO, sdev, | |
755 | "Failed to register bsg queue, errno=%d\n", error); | |
756 | ||
757 | /* we're treating error on bsg register as non-fatal, so pretend | |
758 | * nothing went wrong */ | |
759 | error = 0; | |
760 | ||
bfd12944 | 761 | /* add additional host specific attributes */ |
1da177e4 LT |
762 | if (sdev->host->hostt->sdev_attrs) { |
763 | for (i = 0; sdev->host->hostt->sdev_attrs[i]; i++) { | |
bfd12944 | 764 | error = device_create_file(&sdev->sdev_gendev, |
1da177e4 LT |
765 | sdev->host->hostt->sdev_attrs[i]); |
766 | if (error) { | |
903f4fed | 767 | __scsi_remove_device(sdev); |
1da177e4 LT |
768 | goto out; |
769 | } | |
770 | } | |
771 | } | |
1da177e4 LT |
772 | |
773 | transport_add_device(&sdev->sdev_gendev); | |
774 | out: | |
775 | return error; | |
776 | ||
777 | clean_device: | |
778 | scsi_device_set_state(sdev, SDEV_CANCEL); | |
779 | ||
780 | device_del(&sdev->sdev_gendev); | |
781 | transport_destroy_device(&sdev->sdev_gendev); | |
782 | put_device(&sdev->sdev_gendev); | |
783 | ||
784 | return error; | |
785 | } | |
786 | ||
903f4fed | 787 | void __scsi_remove_device(struct scsi_device *sdev) |
1da177e4 | 788 | { |
df133c21 JB |
789 | struct device *dev = &sdev->sdev_gendev; |
790 | ||
1da177e4 | 791 | if (scsi_device_set_state(sdev, SDEV_CANCEL) != 0) |
903f4fed | 792 | return; |
1da177e4 | 793 | |
80ed71ce | 794 | bsg_unregister_queue(sdev->request_queue); |
1da177e4 | 795 | class_device_unregister(&sdev->sdev_classdev); |
df133c21 JB |
796 | transport_remove_device(dev); |
797 | device_del(dev); | |
1da177e4 LT |
798 | scsi_device_set_state(sdev, SDEV_DEL); |
799 | if (sdev->host->hostt->slave_destroy) | |
800 | sdev->host->hostt->slave_destroy(sdev); | |
df133c21 JB |
801 | transport_destroy_device(dev); |
802 | put_device(dev); | |
903f4fed AS |
803 | } |
804 | ||
805 | /** | |
806 | * scsi_remove_device - unregister a device from the scsi bus | |
807 | * @sdev: scsi_device to unregister | |
808 | **/ | |
809 | void scsi_remove_device(struct scsi_device *sdev) | |
810 | { | |
54195002 AS |
811 | struct Scsi_Host *shost = sdev->host; |
812 | ||
0b950672 | 813 | mutex_lock(&shost->scan_mutex); |
903f4fed | 814 | __scsi_remove_device(sdev); |
0b950672 | 815 | mutex_unlock(&shost->scan_mutex); |
1da177e4 LT |
816 | } |
817 | EXPORT_SYMBOL(scsi_remove_device); | |
818 | ||
44818efb | 819 | static void __scsi_remove_target(struct scsi_target *starget) |
1da177e4 LT |
820 | { |
821 | struct Scsi_Host *shost = dev_to_shost(starget->dev.parent); | |
822 | unsigned long flags; | |
a64358db | 823 | struct scsi_device *sdev; |
1da177e4 LT |
824 | |
825 | spin_lock_irqsave(shost->host_lock, flags); | |
826 | starget->reap_ref++; | |
a64358db AS |
827 | restart: |
828 | list_for_each_entry(sdev, &shost->__devices, siblings) { | |
1da177e4 | 829 | if (sdev->channel != starget->channel || |
a64358db AS |
830 | sdev->id != starget->id || |
831 | sdev->sdev_state == SDEV_DEL) | |
1da177e4 LT |
832 | continue; |
833 | spin_unlock_irqrestore(shost->host_lock, flags); | |
834 | scsi_remove_device(sdev); | |
835 | spin_lock_irqsave(shost->host_lock, flags); | |
a64358db | 836 | goto restart; |
1da177e4 LT |
837 | } |
838 | spin_unlock_irqrestore(shost->host_lock, flags); | |
839 | scsi_target_reap(starget); | |
840 | } | |
841 | ||
20b1e674 PM |
842 | static int __remove_child (struct device * dev, void * data) |
843 | { | |
844 | if (scsi_is_target_device(dev)) | |
845 | __scsi_remove_target(to_scsi_target(dev)); | |
846 | return 0; | |
847 | } | |
848 | ||
1da177e4 LT |
849 | /** |
850 | * scsi_remove_target - try to remove a target and all its devices | |
851 | * @dev: generic starget or parent of generic stargets to be removed | |
852 | * | |
853 | * Note: This is slightly racy. It is possible that if the user | |
854 | * requests the addition of another device then the target won't be | |
855 | * removed. | |
856 | */ | |
857 | void scsi_remove_target(struct device *dev) | |
858 | { | |
20b1e674 | 859 | struct device *rdev; |
1da177e4 LT |
860 | |
861 | if (scsi_is_target_device(dev)) { | |
862 | __scsi_remove_target(to_scsi_target(dev)); | |
863 | return; | |
864 | } | |
865 | ||
866 | rdev = get_device(dev); | |
20b1e674 | 867 | device_for_each_child(dev, NULL, __remove_child); |
1da177e4 LT |
868 | put_device(rdev); |
869 | } | |
870 | EXPORT_SYMBOL(scsi_remove_target); | |
871 | ||
872 | int scsi_register_driver(struct device_driver *drv) | |
873 | { | |
874 | drv->bus = &scsi_bus_type; | |
875 | ||
876 | return driver_register(drv); | |
877 | } | |
878 | EXPORT_SYMBOL(scsi_register_driver); | |
879 | ||
880 | int scsi_register_interface(struct class_interface *intf) | |
881 | { | |
882 | intf->class = &sdev_class; | |
883 | ||
884 | return class_interface_register(intf); | |
885 | } | |
886 | EXPORT_SYMBOL(scsi_register_interface); | |
887 | ||
888 | ||
889 | static struct class_device_attribute *class_attr_overridden( | |
890 | struct class_device_attribute **attrs, | |
891 | struct class_device_attribute *attr) | |
892 | { | |
893 | int i; | |
894 | ||
895 | if (!attrs) | |
896 | return NULL; | |
897 | for (i = 0; attrs[i]; i++) | |
898 | if (!strcmp(attrs[i]->attr.name, attr->attr.name)) | |
899 | return attrs[i]; | |
900 | return NULL; | |
901 | } | |
902 | ||
903 | static int class_attr_add(struct class_device *classdev, | |
904 | struct class_device_attribute *attr) | |
905 | { | |
906 | struct class_device_attribute *base_attr; | |
907 | ||
908 | /* | |
909 | * Spare the caller from having to copy things it's not interested in. | |
910 | */ | |
911 | base_attr = class_attr_overridden(scsi_sysfs_shost_attrs, attr); | |
912 | if (base_attr) { | |
913 | /* extend permissions */ | |
914 | attr->attr.mode |= base_attr->attr.mode; | |
915 | ||
916 | /* override null show/store with default */ | |
917 | if (!attr->show) | |
918 | attr->show = base_attr->show; | |
919 | if (!attr->store) | |
920 | attr->store = base_attr->store; | |
921 | } | |
922 | ||
923 | return class_device_create_file(classdev, attr); | |
924 | } | |
925 | ||
926 | /** | |
927 | * scsi_sysfs_add_host - add scsi host to subsystem | |
928 | * @shost: scsi host struct to add to subsystem | |
929 | * @dev: parent struct device pointer | |
930 | **/ | |
931 | int scsi_sysfs_add_host(struct Scsi_Host *shost) | |
932 | { | |
933 | int error, i; | |
934 | ||
935 | if (shost->hostt->shost_attrs) { | |
936 | for (i = 0; shost->hostt->shost_attrs[i]; i++) { | |
937 | error = class_attr_add(&shost->shost_classdev, | |
938 | shost->hostt->shost_attrs[i]); | |
939 | if (error) | |
940 | return error; | |
941 | } | |
942 | } | |
943 | ||
944 | for (i = 0; scsi_sysfs_shost_attrs[i]; i++) { | |
945 | if (!class_attr_overridden(shost->hostt->shost_attrs, | |
946 | scsi_sysfs_shost_attrs[i])) { | |
947 | error = class_device_create_file(&shost->shost_classdev, | |
948 | scsi_sysfs_shost_attrs[i]); | |
949 | if (error) | |
950 | return error; | |
951 | } | |
952 | } | |
953 | ||
954 | transport_register_device(&shost->shost_gendev); | |
955 | return 0; | |
956 | } | |
957 | ||
bfd12944 KS |
958 | static struct device_type scsi_dev_type = { |
959 | .name = "scsi_device", | |
960 | .release = scsi_device_dev_release, | |
961 | .groups = scsi_sdev_attr_groups, | |
962 | }; | |
963 | ||
1da177e4 LT |
964 | void scsi_sysfs_device_initialize(struct scsi_device *sdev) |
965 | { | |
966 | unsigned long flags; | |
967 | struct Scsi_Host *shost = sdev->host; | |
968 | struct scsi_target *starget = sdev->sdev_target; | |
969 | ||
970 | device_initialize(&sdev->sdev_gendev); | |
971 | sdev->sdev_gendev.bus = &scsi_bus_type; | |
bfd12944 | 972 | sdev->sdev_gendev.type = &scsi_dev_type; |
1da177e4 LT |
973 | sprintf(sdev->sdev_gendev.bus_id,"%d:%d:%d:%d", |
974 | sdev->host->host_no, sdev->channel, sdev->id, | |
975 | sdev->lun); | |
976 | ||
977 | class_device_initialize(&sdev->sdev_classdev); | |
978 | sdev->sdev_classdev.dev = &sdev->sdev_gendev; | |
979 | sdev->sdev_classdev.class = &sdev_class; | |
980 | snprintf(sdev->sdev_classdev.class_id, BUS_ID_SIZE, | |
981 | "%d:%d:%d:%d", sdev->host->host_no, | |
982 | sdev->channel, sdev->id, sdev->lun); | |
7c9d6f16 | 983 | sdev->scsi_level = starget->scsi_level; |
1da177e4 LT |
984 | transport_setup_device(&sdev->sdev_gendev); |
985 | spin_lock_irqsave(shost->host_lock, flags); | |
986 | list_add_tail(&sdev->same_target_siblings, &starget->devices); | |
987 | list_add_tail(&sdev->siblings, &shost->__devices); | |
988 | spin_unlock_irqrestore(shost->host_lock, flags); | |
989 | } | |
990 | ||
991 | int scsi_is_sdev_device(const struct device *dev) | |
992 | { | |
13ba9bcb | 993 | return dev->type == &scsi_dev_type; |
1da177e4 LT |
994 | } |
995 | EXPORT_SYMBOL(scsi_is_sdev_device); | |
996 | ||
997 | /* A blank transport template that is used in drivers that don't | |
998 | * yet implement Transport Attributes */ | |
999 | struct scsi_transport_template blank_transport_template = { { { {NULL, }, }, }, }; |