Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
1da177e4 LT |
2 | /* |
3 | * linux/drivers/scsi/scsi_proc.c | |
4 | * | |
5 | * The functions in this file provide an interface between | |
6 | * the PROC file system and the SCSI device drivers | |
7 | * It is mainly used for debugging, statistics and to pass | |
8 | * information directly to the lowlevel driver. | |
9 | * | |
10 | * (c) 1995 Michael Neuffer neuffer@goofy.zdv.uni-mainz.de | |
11 | * Version: 0.99.8 last change: 95/09/13 | |
12 | * | |
13 | * generic command parser provided by: | |
14 | * Andreas Heilwagen <crashcar@informatik.uni-koblenz.de> | |
15 | * | |
16 | * generic_proc_info() support of xxxx_info() by: | |
17 | * Michael A. Griffith <grif@acm.org> | |
18 | */ | |
19 | ||
20 | #include <linux/module.h> | |
21 | #include <linux/init.h> | |
22 | #include <linux/string.h> | |
23 | #include <linux/mm.h> | |
1da177e4 LT |
24 | #include <linux/proc_fs.h> |
25 | #include <linux/errno.h> | |
26 | #include <linux/blkdev.h> | |
27 | #include <linux/seq_file.h> | |
0b950672 | 28 | #include <linux/mutex.h> |
5a0e3ad6 | 29 | #include <linux/gfp.h> |
7c0f6ba6 | 30 | #include <linux/uaccess.h> |
1da177e4 LT |
31 | |
32 | #include <scsi/scsi.h> | |
33 | #include <scsi/scsi_device.h> | |
34 | #include <scsi/scsi_host.h> | |
e02f3f59 | 35 | #include <scsi/scsi_transport.h> |
1da177e4 LT |
36 | |
37 | #include "scsi_priv.h" | |
38 | #include "scsi_logging.h" | |
39 | ||
40 | ||
41 | /* 4K page size, but our output routines, use some slack for overruns */ | |
42 | #define PROC_BLOCK_SIZE (3*1024) | |
43 | ||
44 | static struct proc_dir_entry *proc_scsi; | |
45 | ||
036abd61 | 46 | /* Protects scsi_proc_list */ |
0b950672 | 47 | static DEFINE_MUTEX(global_host_template_mutex); |
036abd61 BVA |
48 | static LIST_HEAD(scsi_proc_list); |
49 | ||
50 | /** | |
51 | * struct scsi_proc_entry - (host template, SCSI proc dir) association | |
52 | * @entry: entry in scsi_proc_list. | |
53 | * @sht: SCSI host template associated with the procfs directory. | |
54 | * @proc_dir: procfs directory associated with the SCSI host template. | |
55 | * @present: Number of SCSI hosts instantiated for @sht. | |
56 | */ | |
57 | struct scsi_proc_entry { | |
58 | struct list_head entry; | |
59 | const struct scsi_host_template *sht; | |
60 | struct proc_dir_entry *proc_dir; | |
61 | unsigned int present; | |
62 | }; | |
1da177e4 | 63 | |
0ffddfbb AV |
64 | static ssize_t proc_scsi_host_write(struct file *file, const char __user *buf, |
65 | size_t count, loff_t *ppos) | |
66 | { | |
359745d7 | 67 | struct Scsi_Host *shost = pde_data(file_inode(file)); |
0ffddfbb AV |
68 | ssize_t ret = -ENOMEM; |
69 | char *page; | |
70 | ||
71 | if (count > PROC_BLOCK_SIZE) | |
72 | return -EOVERFLOW; | |
73 | ||
74 | if (!shost->hostt->write_info) | |
75 | return -EINVAL; | |
76 | ||
77 | page = (char *)__get_free_page(GFP_KERNEL); | |
78 | if (page) { | |
79 | ret = -EFAULT; | |
80 | if (copy_from_user(page, buf, count)) | |
81 | goto out; | |
82 | ret = shost->hostt->write_info(shost, page, count); | |
83 | } | |
84 | out: | |
85 | free_page((unsigned long)page); | |
86 | return ret; | |
87 | } | |
88 | ||
89 | static int proc_scsi_show(struct seq_file *m, void *v) | |
90 | { | |
91 | struct Scsi_Host *shost = m->private; | |
92 | return shost->hostt->show_info(m, shost); | |
93 | } | |
94 | ||
95 | static int proc_scsi_host_open(struct inode *inode, struct file *file) | |
96 | { | |
359745d7 | 97 | return single_open_size(file, proc_scsi_show, pde_data(inode), |
859d22f9 | 98 | 4 * PAGE_SIZE); |
0ffddfbb AV |
99 | } |
100 | ||
036abd61 BVA |
101 | static struct scsi_proc_entry * |
102 | __scsi_lookup_proc_entry(const struct scsi_host_template *sht) | |
103 | { | |
104 | struct scsi_proc_entry *e; | |
105 | ||
106 | lockdep_assert_held(&global_host_template_mutex); | |
107 | ||
108 | list_for_each_entry(e, &scsi_proc_list, entry) | |
109 | if (e->sht == sht) | |
110 | return e; | |
111 | ||
112 | return NULL; | |
113 | } | |
114 | ||
115 | static struct scsi_proc_entry * | |
116 | scsi_lookup_proc_entry(const struct scsi_host_template *sht) | |
117 | { | |
118 | struct scsi_proc_entry *e; | |
119 | ||
120 | mutex_lock(&global_host_template_mutex); | |
121 | e = __scsi_lookup_proc_entry(sht); | |
122 | mutex_unlock(&global_host_template_mutex); | |
123 | ||
124 | return e; | |
125 | } | |
126 | ||
77916da7 BVA |
127 | /** |
128 | * scsi_template_proc_dir() - returns the procfs dir for a SCSI host template | |
129 | * @sht: SCSI host template pointer. | |
130 | */ | |
131 | struct proc_dir_entry * | |
132 | scsi_template_proc_dir(const struct scsi_host_template *sht) | |
133 | { | |
036abd61 BVA |
134 | struct scsi_proc_entry *e = scsi_lookup_proc_entry(sht); |
135 | ||
136 | return e ? e->proc_dir : NULL; | |
77916da7 BVA |
137 | } |
138 | EXPORT_SYMBOL_GPL(scsi_template_proc_dir); | |
139 | ||
97a32539 AD |
140 | static const struct proc_ops proc_scsi_ops = { |
141 | .proc_open = proc_scsi_host_open, | |
142 | .proc_release = single_release, | |
143 | .proc_read = seq_read, | |
144 | .proc_lseek = seq_lseek, | |
145 | .proc_write = proc_scsi_host_write | |
0ffddfbb AV |
146 | }; |
147 | ||
eb44820c RL |
148 | /** |
149 | * scsi_proc_hostdir_add - Create directory in /proc for a scsi host | |
150 | * @sht: owner of this directory | |
151 | * | |
152 | * Sets sht->proc_dir to the new directory. | |
153 | */ | |
036abd61 | 154 | int scsi_proc_hostdir_add(const struct scsi_host_template *sht) |
1da177e4 | 155 | { |
036abd61 BVA |
156 | struct scsi_proc_entry *e; |
157 | int ret; | |
ecca3f9b | 158 | |
70ef457d | 159 | if (!sht->show_info) |
ecca3f9b | 160 | return 0; |
1da177e4 | 161 | |
0b950672 | 162 | mutex_lock(&global_host_template_mutex); |
036abd61 BVA |
163 | e = __scsi_lookup_proc_entry(sht); |
164 | if (!e) { | |
165 | e = kzalloc(sizeof(*e), GFP_KERNEL); | |
166 | if (!e) { | |
ecca3f9b | 167 | ret = -ENOMEM; |
036abd61 | 168 | goto unlock; |
ecca3f9b | 169 | } |
1da177e4 | 170 | } |
036abd61 BVA |
171 | if (e->present++) |
172 | goto success; | |
173 | e->proc_dir = proc_mkdir(sht->proc_name, proc_scsi); | |
174 | if (!e->proc_dir) { | |
175 | printk(KERN_ERR "%s: proc_mkdir failed for %s\n", __func__, | |
176 | sht->proc_name); | |
177 | ret = -ENOMEM; | |
178 | goto unlock; | |
179 | } | |
180 | e->sht = sht; | |
181 | list_add_tail(&e->entry, &scsi_proc_list); | |
182 | success: | |
183 | e = NULL; | |
184 | ret = 0; | |
185 | unlock: | |
0b950672 | 186 | mutex_unlock(&global_host_template_mutex); |
ecca3f9b | 187 | |
036abd61 | 188 | kfree(e); |
ecca3f9b | 189 | return ret; |
1da177e4 LT |
190 | } |
191 | ||
eb44820c RL |
192 | /** |
193 | * scsi_proc_hostdir_rm - remove directory in /proc for a scsi host | |
194 | * @sht: owner of directory | |
195 | */ | |
036abd61 | 196 | void scsi_proc_hostdir_rm(const struct scsi_host_template *sht) |
1da177e4 | 197 | { |
036abd61 BVA |
198 | struct scsi_proc_entry *e; |
199 | ||
70ef457d | 200 | if (!sht->show_info) |
1da177e4 LT |
201 | return; |
202 | ||
0b950672 | 203 | mutex_lock(&global_host_template_mutex); |
036abd61 BVA |
204 | e = __scsi_lookup_proc_entry(sht); |
205 | if (e && !--e->present) { | |
1da177e4 | 206 | remove_proc_entry(sht->proc_name, proc_scsi); |
036abd61 BVA |
207 | list_del(&e->entry); |
208 | kfree(e); | |
1da177e4 | 209 | } |
0b950672 | 210 | mutex_unlock(&global_host_template_mutex); |
1da177e4 LT |
211 | } |
212 | ||
eb44820c RL |
213 | |
214 | /** | |
215 | * scsi_proc_host_add - Add entry for this host to appropriate /proc dir | |
216 | * @shost: host to add | |
217 | */ | |
1da177e4 LT |
218 | void scsi_proc_host_add(struct Scsi_Host *shost) |
219 | { | |
036abd61 BVA |
220 | const struct scsi_host_template *sht = shost->hostt; |
221 | struct scsi_proc_entry *e; | |
1da177e4 LT |
222 | struct proc_dir_entry *p; |
223 | char name[10]; | |
224 | ||
036abd61 | 225 | if (!sht->show_info) |
1da177e4 LT |
226 | return; |
227 | ||
036abd61 BVA |
228 | e = scsi_lookup_proc_entry(sht); |
229 | if (!e) | |
230 | goto err; | |
231 | ||
1da177e4 | 232 | sprintf(name,"%d", shost->host_no); |
036abd61 BVA |
233 | p = proc_create_data(name, S_IRUGO | S_IWUSR, e->proc_dir, |
234 | &proc_scsi_ops, shost); | |
70ef457d | 235 | if (!p) |
036abd61 BVA |
236 | goto err; |
237 | return; | |
238 | ||
239 | err: | |
240 | shost_printk(KERN_ERR, shost, | |
241 | "%s: Failed to register host (%s failed)\n", __func__, | |
242 | e ? "proc_create_data()" : "scsi_proc_hostdir_add()"); | |
1da177e4 LT |
243 | } |
244 | ||
eb44820c RL |
245 | /** |
246 | * scsi_proc_host_rm - remove this host's entry from /proc | |
247 | * @shost: which host | |
248 | */ | |
1da177e4 LT |
249 | void scsi_proc_host_rm(struct Scsi_Host *shost) |
250 | { | |
036abd61 BVA |
251 | const struct scsi_host_template *sht = shost->hostt; |
252 | struct scsi_proc_entry *e; | |
1da177e4 LT |
253 | char name[10]; |
254 | ||
036abd61 BVA |
255 | if (!sht->show_info) |
256 | return; | |
257 | ||
258 | e = scsi_lookup_proc_entry(sht); | |
259 | if (!e) | |
1da177e4 LT |
260 | return; |
261 | ||
262 | sprintf(name,"%d", shost->host_no); | |
036abd61 | 263 | remove_proc_entry(name, e->proc_dir); |
1da177e4 | 264 | } |
eb44820c RL |
265 | /** |
266 | * proc_print_scsidevice - return data about this host | |
267 | * @dev: A scsi device | |
268 | * @data: &struct seq_file to output to. | |
269 | * | |
270 | * Description: prints Host, Channel, Id, Lun, Vendor, Model, Rev, Type, | |
271 | * and revision. | |
272 | */ | |
1da177e4 LT |
273 | static int proc_print_scsidevice(struct device *dev, void *data) |
274 | { | |
b0ed4336 | 275 | struct scsi_device *sdev; |
1da177e4 LT |
276 | struct seq_file *s = data; |
277 | int i; | |
278 | ||
b0ed4336 HR |
279 | if (!scsi_is_sdev_device(dev)) |
280 | goto out; | |
281 | ||
282 | sdev = to_scsi_device(dev); | |
1da177e4 | 283 | seq_printf(s, |
9cb78c16 | 284 | "Host: scsi%d Channel: %02d Id: %02d Lun: %02llu\n Vendor: ", |
1da177e4 LT |
285 | sdev->host->host_no, sdev->channel, sdev->id, sdev->lun); |
286 | for (i = 0; i < 8; i++) { | |
287 | if (sdev->vendor[i] >= 0x20) | |
91c40f24 | 288 | seq_putc(s, sdev->vendor[i]); |
1da177e4 | 289 | else |
f50332ff | 290 | seq_putc(s, ' '); |
1da177e4 LT |
291 | } |
292 | ||
91c40f24 | 293 | seq_puts(s, " Model: "); |
1da177e4 LT |
294 | for (i = 0; i < 16; i++) { |
295 | if (sdev->model[i] >= 0x20) | |
91c40f24 | 296 | seq_putc(s, sdev->model[i]); |
1da177e4 | 297 | else |
f50332ff | 298 | seq_putc(s, ' '); |
1da177e4 LT |
299 | } |
300 | ||
91c40f24 | 301 | seq_puts(s, " Rev: "); |
1da177e4 LT |
302 | for (i = 0; i < 4; i++) { |
303 | if (sdev->rev[i] >= 0x20) | |
91c40f24 | 304 | seq_putc(s, sdev->rev[i]); |
1da177e4 | 305 | else |
f50332ff | 306 | seq_putc(s, ' '); |
1da177e4 LT |
307 | } |
308 | ||
f50332ff | 309 | seq_putc(s, '\n'); |
1da177e4 | 310 | |
4ff36718 | 311 | seq_printf(s, " Type: %s ", scsi_device_type(sdev->type)); |
74feb53e AS |
312 | seq_printf(s, " ANSI SCSI revision: %02x", |
313 | sdev->scsi_level - (sdev->scsi_level > 1)); | |
1da177e4 | 314 | if (sdev->scsi_level == 2) |
91c40f24 | 315 | seq_puts(s, " CCS\n"); |
1da177e4 | 316 | else |
f50332ff | 317 | seq_putc(s, '\n'); |
1da177e4 | 318 | |
b0ed4336 | 319 | out: |
1da177e4 LT |
320 | return 0; |
321 | } | |
322 | ||
eb44820c RL |
323 | /** |
324 | * scsi_add_single_device - Respond to user request to probe for/add device | |
325 | * @host: user-supplied decimal integer | |
326 | * @channel: user-supplied decimal integer | |
327 | * @id: user-supplied decimal integer | |
328 | * @lun: user-supplied decimal integer | |
329 | * | |
330 | * Description: called by writing "scsi add-single-device" to /proc/scsi/scsi. | |
331 | * | |
332 | * does scsi_host_lookup() and either user_scan() if that transport | |
333 | * type supports it, or else scsi_scan_host_selected() | |
334 | * | |
335 | * Note: this seems to be aimed exclusively at SCSI parallel busses. | |
336 | */ | |
337 | ||
1da177e4 LT |
338 | static int scsi_add_single_device(uint host, uint channel, uint id, uint lun) |
339 | { | |
340 | struct Scsi_Host *shost; | |
341 | int error = -ENXIO; | |
342 | ||
343 | shost = scsi_host_lookup(host); | |
315cb0ad JS |
344 | if (!shost) |
345 | return error; | |
1da177e4 | 346 | |
e02f3f59 CH |
347 | if (shost->transportt->user_scan) |
348 | error = shost->transportt->user_scan(shost, channel, id, lun); | |
349 | else | |
1d645088 HR |
350 | error = scsi_scan_host_selected(shost, channel, id, lun, |
351 | SCSI_SCAN_MANUAL); | |
1da177e4 LT |
352 | scsi_host_put(shost); |
353 | return error; | |
354 | } | |
355 | ||
eb44820c RL |
356 | /** |
357 | * scsi_remove_single_device - Respond to user request to remove a device | |
358 | * @host: user-supplied decimal integer | |
359 | * @channel: user-supplied decimal integer | |
360 | * @id: user-supplied decimal integer | |
361 | * @lun: user-supplied decimal integer | |
362 | * | |
363 | * Description: called by writing "scsi remove-single-device" to | |
364 | * /proc/scsi/scsi. Does a scsi_device_lookup() and scsi_remove_device() | |
365 | */ | |
1da177e4 LT |
366 | static int scsi_remove_single_device(uint host, uint channel, uint id, uint lun) |
367 | { | |
368 | struct scsi_device *sdev; | |
369 | struct Scsi_Host *shost; | |
370 | int error = -ENXIO; | |
371 | ||
372 | shost = scsi_host_lookup(host); | |
315cb0ad JS |
373 | if (!shost) |
374 | return error; | |
1da177e4 LT |
375 | sdev = scsi_device_lookup(shost, channel, id, lun); |
376 | if (sdev) { | |
377 | scsi_remove_device(sdev); | |
378 | scsi_device_put(sdev); | |
379 | error = 0; | |
380 | } | |
381 | ||
382 | scsi_host_put(shost); | |
383 | return error; | |
384 | } | |
385 | ||
eb44820c RL |
386 | /** |
387 | * proc_scsi_write - handle writes to /proc/scsi/scsi | |
388 | * @file: not used | |
389 | * @buf: buffer to write | |
390 | * @length: length of buf, at most PAGE_SIZE | |
391 | * @ppos: not used | |
392 | * | |
393 | * Description: this provides a legacy mechanism to add or remove devices by | |
394 | * Host, Channel, ID, and Lun. To use, | |
395 | * "echo 'scsi add-single-device 0 1 2 3' > /proc/scsi/scsi" or | |
396 | * "echo 'scsi remove-single-device 0 1 2 3' > /proc/scsi/scsi" with | |
397 | * "0 1 2 3" replaced by the Host, Channel, Id, and Lun. | |
398 | * | |
399 | * Note: this seems to be aimed at parallel SCSI. Most modern busses (USB, | |
400 | * SATA, Firewire, Fibre Channel, etc) dynamically assign these values to | |
401 | * provide a unique identifier and nothing more. | |
402 | */ | |
403 | ||
404 | ||
1da177e4 LT |
405 | static ssize_t proc_scsi_write(struct file *file, const char __user *buf, |
406 | size_t length, loff_t *ppos) | |
407 | { | |
408 | int host, channel, id, lun; | |
409 | char *buffer, *p; | |
410 | int err; | |
411 | ||
412 | if (!buf || length > PAGE_SIZE) | |
413 | return -EINVAL; | |
414 | ||
415 | buffer = (char *)__get_free_page(GFP_KERNEL); | |
416 | if (!buffer) | |
417 | return -ENOMEM; | |
418 | ||
419 | err = -EFAULT; | |
420 | if (copy_from_user(buffer, buf, length)) | |
421 | goto out; | |
422 | ||
423 | err = -EINVAL; | |
424 | if (length < PAGE_SIZE) | |
425 | buffer[length] = '\0'; | |
426 | else if (buffer[PAGE_SIZE-1]) | |
427 | goto out; | |
428 | ||
429 | /* | |
430 | * Usage: echo "scsi add-single-device 0 1 2 3" >/proc/scsi/scsi | |
431 | * with "0 1 2 3" replaced by your "Host Channel Id Lun". | |
432 | */ | |
433 | if (!strncmp("scsi add-single-device", buffer, 22)) { | |
434 | p = buffer + 23; | |
435 | ||
436 | host = simple_strtoul(p, &p, 0); | |
437 | channel = simple_strtoul(p + 1, &p, 0); | |
438 | id = simple_strtoul(p + 1, &p, 0); | |
439 | lun = simple_strtoul(p + 1, &p, 0); | |
440 | ||
441 | err = scsi_add_single_device(host, channel, id, lun); | |
1da177e4 LT |
442 | |
443 | /* | |
444 | * Usage: echo "scsi remove-single-device 0 1 2 3" >/proc/scsi/scsi | |
445 | * with "0 1 2 3" replaced by your "Host Channel Id Lun". | |
446 | */ | |
447 | } else if (!strncmp("scsi remove-single-device", buffer, 25)) { | |
448 | p = buffer + 26; | |
449 | ||
450 | host = simple_strtoul(p, &p, 0); | |
451 | channel = simple_strtoul(p + 1, &p, 0); | |
452 | id = simple_strtoul(p + 1, &p, 0); | |
453 | lun = simple_strtoul(p + 1, &p, 0); | |
454 | ||
455 | err = scsi_remove_single_device(host, channel, id, lun); | |
456 | } | |
457 | ||
2ca48a13 JB |
458 | /* |
459 | * convert success returns so that we return the | |
460 | * number of bytes consumed. | |
461 | */ | |
462 | if (!err) | |
463 | err = length; | |
464 | ||
1da177e4 LT |
465 | out: |
466 | free_page((unsigned long)buffer); | |
467 | return err; | |
468 | } | |
469 | ||
e37c4913 JM |
470 | static inline struct device *next_scsi_device(struct device *start) |
471 | { | |
6bf85ba9 SP |
472 | struct device *next = bus_find_next_device(&scsi_bus_type, start); |
473 | ||
e37c4913 JM |
474 | put_device(start); |
475 | return next; | |
1da177e4 LT |
476 | } |
477 | ||
e37c4913 JM |
478 | static void *scsi_seq_start(struct seq_file *sfile, loff_t *pos) |
479 | { | |
480 | struct device *dev = NULL; | |
481 | loff_t n = *pos; | |
482 | ||
483 | while ((dev = next_scsi_device(dev))) { | |
484 | if (!n--) | |
485 | break; | |
486 | sfile->private++; | |
487 | } | |
488 | return dev; | |
489 | } | |
490 | ||
491 | static void *scsi_seq_next(struct seq_file *sfile, void *v, loff_t *pos) | |
492 | { | |
493 | (*pos)++; | |
494 | sfile->private++; | |
495 | return next_scsi_device(v); | |
496 | } | |
497 | ||
498 | static void scsi_seq_stop(struct seq_file *sfile, void *v) | |
499 | { | |
500 | put_device(v); | |
501 | } | |
502 | ||
503 | static int scsi_seq_show(struct seq_file *sfile, void *dev) | |
504 | { | |
505 | if (!sfile->private) | |
506 | seq_puts(sfile, "Attached devices:\n"); | |
507 | ||
508 | return proc_print_scsidevice(dev, sfile); | |
509 | } | |
510 | ||
511 | static const struct seq_operations scsi_seq_ops = { | |
512 | .start = scsi_seq_start, | |
513 | .next = scsi_seq_next, | |
514 | .stop = scsi_seq_stop, | |
515 | .show = scsi_seq_show | |
516 | }; | |
517 | ||
eb44820c RL |
518 | /** |
519 | * proc_scsi_open - glue function | |
520 | * @inode: not used | |
521 | * @file: passed to single_open() | |
522 | * | |
523 | * Associates proc_scsi_show with this file | |
524 | */ | |
1da177e4 LT |
525 | static int proc_scsi_open(struct inode *inode, struct file *file) |
526 | { | |
527 | /* | |
eb44820c | 528 | * We don't really need this for the write case but it doesn't |
1da177e4 LT |
529 | * harm either. |
530 | */ | |
e37c4913 | 531 | return seq_open(file, &scsi_seq_ops); |
1da177e4 LT |
532 | } |
533 | ||
97a32539 AD |
534 | static const struct proc_ops scsi_scsi_proc_ops = { |
535 | .proc_open = proc_scsi_open, | |
536 | .proc_read = seq_read, | |
537 | .proc_write = proc_scsi_write, | |
538 | .proc_lseek = seq_lseek, | |
539 | .proc_release = seq_release, | |
1da177e4 LT |
540 | }; |
541 | ||
eb44820c RL |
542 | /** |
543 | * scsi_init_procfs - create scsi and scsi/scsi in procfs | |
544 | */ | |
1da177e4 LT |
545 | int __init scsi_init_procfs(void) |
546 | { | |
547 | struct proc_dir_entry *pde; | |
548 | ||
549 | proc_scsi = proc_mkdir("scsi", NULL); | |
550 | if (!proc_scsi) | |
551 | goto err1; | |
552 | ||
97a32539 | 553 | pde = proc_create("scsi/scsi", 0, NULL, &scsi_scsi_proc_ops); |
1da177e4 LT |
554 | if (!pde) |
555 | goto err2; | |
1da177e4 LT |
556 | |
557 | return 0; | |
558 | ||
559 | err2: | |
560 | remove_proc_entry("scsi", NULL); | |
561 | err1: | |
562 | return -ENOMEM; | |
563 | } | |
564 | ||
eb44820c RL |
565 | /** |
566 | * scsi_exit_procfs - Remove scsi/scsi and scsi from procfs | |
567 | */ | |
1da177e4 LT |
568 | void scsi_exit_procfs(void) |
569 | { | |
570 | remove_proc_entry("scsi/scsi", NULL); | |
571 | remove_proc_entry("scsi", NULL); | |
572 | } |