Commit | Line | Data |
---|---|---|
801c135c AB |
1 | /* |
2 | * Copyright (c) International Business Machines Corp., 2006 | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License as published by | |
6 | * the Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, | |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
12 | * the GNU General Public License for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License | |
15 | * along with this program; if not, write to the Free Software | |
16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
17 | * | |
18 | * Author: Artem Bityutskiy (Битюцкий Артём) | |
19 | */ | |
20 | ||
801c135c | 21 | #include "ubi.h" |
2a734bb8 AB |
22 | #include <linux/debugfs.h> |
23 | #include <linux/uaccess.h> | |
b342efd4 | 24 | #include <linux/module.h> |
801c135c | 25 | |
ef7088e7 AB |
26 | |
27 | /** | |
28 | * ubi_dump_flash - dump a region of flash. | |
29 | * @ubi: UBI device description object | |
30 | * @pnum: the physical eraseblock number to dump | |
31 | * @offset: the starting offset within the physical eraseblock to dump | |
32 | * @len: the length of the region to dump | |
33 | */ | |
34 | void ubi_dump_flash(struct ubi_device *ubi, int pnum, int offset, int len) | |
35 | { | |
36 | int err; | |
37 | size_t read; | |
38 | void *buf; | |
39 | loff_t addr = (loff_t)pnum * ubi->peb_size + offset; | |
40 | ||
41 | buf = vmalloc(len); | |
42 | if (!buf) | |
43 | return; | |
44 | err = mtd_read(ubi->mtd, addr, len, &read, buf); | |
45 | if (err && err != -EUCLEAN) { | |
46 | ubi_err("error %d while reading %d bytes from PEB %d:%d, " | |
47 | "read %zd bytes", err, len, pnum, offset, read); | |
48 | goto out; | |
49 | } | |
50 | ||
51 | ubi_msg("dumping %d bytes of data from PEB %d, offset %d", | |
52 | len, pnum, offset); | |
53 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, buf, len, 1); | |
54 | out: | |
55 | vfree(buf); | |
56 | return; | |
57 | } | |
58 | ||
801c135c | 59 | /** |
a904e3f1 | 60 | * ubi_dump_ec_hdr - dump an erase counter header. |
801c135c AB |
61 | * @ec_hdr: the erase counter header to dump |
62 | */ | |
a904e3f1 | 63 | void ubi_dump_ec_hdr(const struct ubi_ec_hdr *ec_hdr) |
801c135c | 64 | { |
c8566350 AB |
65 | printk(KERN_DEBUG "Erase counter header dump:\n"); |
66 | printk(KERN_DEBUG "\tmagic %#08x\n", | |
67 | be32_to_cpu(ec_hdr->magic)); | |
68 | printk(KERN_DEBUG "\tversion %d\n", (int)ec_hdr->version); | |
69 | printk(KERN_DEBUG "\tec %llu\n", | |
70 | (long long)be64_to_cpu(ec_hdr->ec)); | |
71 | printk(KERN_DEBUG "\tvid_hdr_offset %d\n", | |
72 | be32_to_cpu(ec_hdr->vid_hdr_offset)); | |
73 | printk(KERN_DEBUG "\tdata_offset %d\n", | |
74 | be32_to_cpu(ec_hdr->data_offset)); | |
0c6c7fa1 AH |
75 | printk(KERN_DEBUG "\timage_seq %d\n", |
76 | be32_to_cpu(ec_hdr->image_seq)); | |
c8566350 AB |
77 | printk(KERN_DEBUG "\thdr_crc %#08x\n", |
78 | be32_to_cpu(ec_hdr->hdr_crc)); | |
79 | printk(KERN_DEBUG "erase counter header hexdump:\n"); | |
6986646b AB |
80 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, |
81 | ec_hdr, UBI_EC_HDR_SIZE, 1); | |
801c135c AB |
82 | } |
83 | ||
84 | /** | |
a904e3f1 | 85 | * ubi_dump_vid_hdr - dump a volume identifier header. |
801c135c AB |
86 | * @vid_hdr: the volume identifier header to dump |
87 | */ | |
a904e3f1 | 88 | void ubi_dump_vid_hdr(const struct ubi_vid_hdr *vid_hdr) |
801c135c | 89 | { |
c8566350 AB |
90 | printk(KERN_DEBUG "Volume identifier header dump:\n"); |
91 | printk(KERN_DEBUG "\tmagic %08x\n", be32_to_cpu(vid_hdr->magic)); | |
feddbb34 AB |
92 | printk(KERN_DEBUG "\tversion %d\n", (int)vid_hdr->version); |
93 | printk(KERN_DEBUG "\tvol_type %d\n", (int)vid_hdr->vol_type); | |
94 | printk(KERN_DEBUG "\tcopy_flag %d\n", (int)vid_hdr->copy_flag); | |
95 | printk(KERN_DEBUG "\tcompat %d\n", (int)vid_hdr->compat); | |
96 | printk(KERN_DEBUG "\tvol_id %d\n", be32_to_cpu(vid_hdr->vol_id)); | |
97 | printk(KERN_DEBUG "\tlnum %d\n", be32_to_cpu(vid_hdr->lnum)); | |
98 | printk(KERN_DEBUG "\tdata_size %d\n", be32_to_cpu(vid_hdr->data_size)); | |
99 | printk(KERN_DEBUG "\tused_ebs %d\n", be32_to_cpu(vid_hdr->used_ebs)); | |
100 | printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(vid_hdr->data_pad)); | |
c8566350 | 101 | printk(KERN_DEBUG "\tsqnum %llu\n", |
3261ebd7 | 102 | (unsigned long long)be64_to_cpu(vid_hdr->sqnum)); |
c8566350 AB |
103 | printk(KERN_DEBUG "\thdr_crc %08x\n", be32_to_cpu(vid_hdr->hdr_crc)); |
104 | printk(KERN_DEBUG "Volume identifier header hexdump:\n"); | |
105 | print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 32, 1, | |
106 | vid_hdr, UBI_VID_HDR_SIZE, 1); | |
801c135c AB |
107 | } |
108 | ||
109 | /** | |
766381f0 | 110 | * ubi_dump_vol_info - dump volume information. |
801c135c AB |
111 | * @vol: UBI volume description object |
112 | */ | |
766381f0 | 113 | void ubi_dump_vol_info(const struct ubi_volume *vol) |
801c135c | 114 | { |
c8566350 AB |
115 | printk(KERN_DEBUG "Volume information dump:\n"); |
116 | printk(KERN_DEBUG "\tvol_id %d\n", vol->vol_id); | |
117 | printk(KERN_DEBUG "\treserved_pebs %d\n", vol->reserved_pebs); | |
118 | printk(KERN_DEBUG "\talignment %d\n", vol->alignment); | |
119 | printk(KERN_DEBUG "\tdata_pad %d\n", vol->data_pad); | |
120 | printk(KERN_DEBUG "\tvol_type %d\n", vol->vol_type); | |
121 | printk(KERN_DEBUG "\tname_len %d\n", vol->name_len); | |
122 | printk(KERN_DEBUG "\tusable_leb_size %d\n", vol->usable_leb_size); | |
123 | printk(KERN_DEBUG "\tused_ebs %d\n", vol->used_ebs); | |
124 | printk(KERN_DEBUG "\tused_bytes %lld\n", vol->used_bytes); | |
125 | printk(KERN_DEBUG "\tlast_eb_bytes %d\n", vol->last_eb_bytes); | |
126 | printk(KERN_DEBUG "\tcorrupted %d\n", vol->corrupted); | |
127 | printk(KERN_DEBUG "\tupd_marker %d\n", vol->upd_marker); | |
801c135c AB |
128 | |
129 | if (vol->name_len <= UBI_VOL_NAME_MAX && | |
130 | strnlen(vol->name, vol->name_len + 1) == vol->name_len) { | |
c8566350 | 131 | printk(KERN_DEBUG "\tname %s\n", vol->name); |
801c135c | 132 | } else { |
c8566350 AB |
133 | printk(KERN_DEBUG "\t1st 5 characters of name: %c%c%c%c%c\n", |
134 | vol->name[0], vol->name[1], vol->name[2], | |
135 | vol->name[3], vol->name[4]); | |
801c135c AB |
136 | } |
137 | } | |
138 | ||
139 | /** | |
1f021e1d | 140 | * ubi_dump_vtbl_record - dump a &struct ubi_vtbl_record object. |
801c135c AB |
141 | * @r: the object to dump |
142 | * @idx: volume table index | |
143 | */ | |
1f021e1d | 144 | void ubi_dump_vtbl_record(const struct ubi_vtbl_record *r, int idx) |
801c135c | 145 | { |
3261ebd7 | 146 | int name_len = be16_to_cpu(r->name_len); |
801c135c | 147 | |
c8566350 AB |
148 | printk(KERN_DEBUG "Volume table record %d dump:\n", idx); |
149 | printk(KERN_DEBUG "\treserved_pebs %d\n", | |
150 | be32_to_cpu(r->reserved_pebs)); | |
151 | printk(KERN_DEBUG "\talignment %d\n", be32_to_cpu(r->alignment)); | |
152 | printk(KERN_DEBUG "\tdata_pad %d\n", be32_to_cpu(r->data_pad)); | |
153 | printk(KERN_DEBUG "\tvol_type %d\n", (int)r->vol_type); | |
154 | printk(KERN_DEBUG "\tupd_marker %d\n", (int)r->upd_marker); | |
155 | printk(KERN_DEBUG "\tname_len %d\n", name_len); | |
801c135c AB |
156 | |
157 | if (r->name[0] == '\0') { | |
c8566350 | 158 | printk(KERN_DEBUG "\tname NULL\n"); |
801c135c AB |
159 | return; |
160 | } | |
161 | ||
162 | if (name_len <= UBI_VOL_NAME_MAX && | |
163 | strnlen(&r->name[0], name_len + 1) == name_len) { | |
c8566350 | 164 | printk(KERN_DEBUG "\tname %s\n", &r->name[0]); |
801c135c | 165 | } else { |
c8566350 | 166 | printk(KERN_DEBUG "\t1st 5 characters of name: %c%c%c%c%c\n", |
801c135c AB |
167 | r->name[0], r->name[1], r->name[2], r->name[3], |
168 | r->name[4]); | |
169 | } | |
c8566350 | 170 | printk(KERN_DEBUG "\tcrc %#08x\n", be32_to_cpu(r->crc)); |
801c135c AB |
171 | } |
172 | ||
173 | /** | |
517af48c AB |
174 | * ubi_dump_av - dump a &struct ubi_ainf_volume object. |
175 | * @av: the object to dump | |
801c135c | 176 | */ |
517af48c | 177 | void ubi_dump_av(const struct ubi_ainf_volume *av) |
801c135c | 178 | { |
a4e6042f | 179 | printk(KERN_DEBUG "Volume attaching information dump:\n"); |
517af48c AB |
180 | printk(KERN_DEBUG "\tvol_id %d\n", av->vol_id); |
181 | printk(KERN_DEBUG "\thighest_lnum %d\n", av->highest_lnum); | |
182 | printk(KERN_DEBUG "\tleb_count %d\n", av->leb_count); | |
183 | printk(KERN_DEBUG "\tcompat %d\n", av->compat); | |
184 | printk(KERN_DEBUG "\tvol_type %d\n", av->vol_type); | |
185 | printk(KERN_DEBUG "\tused_ebs %d\n", av->used_ebs); | |
186 | printk(KERN_DEBUG "\tlast_data_size %d\n", av->last_data_size); | |
187 | printk(KERN_DEBUG "\tdata_pad %d\n", av->data_pad); | |
801c135c AB |
188 | } |
189 | ||
190 | /** | |
2c5ec5ce AB |
191 | * ubi_dump_aeb - dump a &struct ubi_ainf_peb object. |
192 | * @aeb: the object to dump | |
801c135c AB |
193 | * @type: object type: 0 - not corrupted, 1 - corrupted |
194 | */ | |
2c5ec5ce | 195 | void ubi_dump_aeb(const struct ubi_ainf_peb *aeb, int type) |
801c135c | 196 | { |
a4e6042f | 197 | printk(KERN_DEBUG "eraseblock attaching information dump:\n"); |
2c5ec5ce AB |
198 | printk(KERN_DEBUG "\tec %d\n", aeb->ec); |
199 | printk(KERN_DEBUG "\tpnum %d\n", aeb->pnum); | |
801c135c | 200 | if (type == 0) { |
2c5ec5ce AB |
201 | printk(KERN_DEBUG "\tlnum %d\n", aeb->lnum); |
202 | printk(KERN_DEBUG "\tscrub %d\n", aeb->scrub); | |
203 | printk(KERN_DEBUG "\tsqnum %llu\n", aeb->sqnum); | |
801c135c AB |
204 | } |
205 | } | |
206 | ||
207 | /** | |
718c00bb | 208 | * ubi_dump_mkvol_req - dump a &struct ubi_mkvol_req object. |
801c135c AB |
209 | * @req: the object to dump |
210 | */ | |
718c00bb | 211 | void ubi_dump_mkvol_req(const struct ubi_mkvol_req *req) |
801c135c AB |
212 | { |
213 | char nm[17]; | |
214 | ||
c8566350 AB |
215 | printk(KERN_DEBUG "Volume creation request dump:\n"); |
216 | printk(KERN_DEBUG "\tvol_id %d\n", req->vol_id); | |
217 | printk(KERN_DEBUG "\talignment %d\n", req->alignment); | |
218 | printk(KERN_DEBUG "\tbytes %lld\n", (long long)req->bytes); | |
219 | printk(KERN_DEBUG "\tvol_type %d\n", req->vol_type); | |
220 | printk(KERN_DEBUG "\tname_len %d\n", req->name_len); | |
801c135c AB |
221 | |
222 | memcpy(nm, req->name, 16); | |
223 | nm[16] = 0; | |
c8566350 | 224 | printk(KERN_DEBUG "\t1st 16 characters of name: %s\n", nm); |
801c135c AB |
225 | } |
226 | ||
2a734bb8 AB |
227 | /** |
228 | * ubi_debugging_init_dev - initialize debugging for an UBI device. | |
229 | * @ubi: UBI device description object | |
230 | * | |
231 | * This function initializes debugging-related data for UBI device @ubi. | |
232 | * Returns zero in case of success and a negative error code in case of | |
233 | * failure. | |
234 | */ | |
235 | int ubi_debugging_init_dev(struct ubi_device *ubi) | |
236 | { | |
237 | ubi->dbg = kzalloc(sizeof(struct ubi_debug_info), GFP_KERNEL); | |
238 | if (!ubi->dbg) | |
239 | return -ENOMEM; | |
240 | ||
241 | return 0; | |
242 | } | |
243 | ||
244 | /** | |
245 | * ubi_debugging_exit_dev - free debugging data for an UBI device. | |
246 | * @ubi: UBI device description object | |
247 | */ | |
248 | void ubi_debugging_exit_dev(struct ubi_device *ubi) | |
249 | { | |
250 | kfree(ubi->dbg); | |
251 | } | |
252 | ||
253 | /* | |
254 | * Root directory for UBI stuff in debugfs. Contains sub-directories which | |
255 | * contain the stuff specific to particular UBI devices. | |
256 | */ | |
257 | static struct dentry *dfs_rootdir; | |
258 | ||
259 | /** | |
260 | * ubi_debugfs_init - create UBI debugfs directory. | |
261 | * | |
262 | * Create UBI debugfs directory. Returns zero in case of success and a negative | |
263 | * error code in case of failure. | |
264 | */ | |
265 | int ubi_debugfs_init(void) | |
266 | { | |
903e0e4e | 267 | if (!IS_ENABLED(CONFIG_DEBUG_FS)) |
e9b4cf20 AB |
268 | return 0; |
269 | ||
2a734bb8 AB |
270 | dfs_rootdir = debugfs_create_dir("ubi", NULL); |
271 | if (IS_ERR_OR_NULL(dfs_rootdir)) { | |
272 | int err = dfs_rootdir ? -ENODEV : PTR_ERR(dfs_rootdir); | |
273 | ||
274 | ubi_err("cannot create \"ubi\" debugfs directory, error %d\n", | |
275 | err); | |
276 | return err; | |
277 | } | |
278 | ||
279 | return 0; | |
280 | } | |
281 | ||
282 | /** | |
283 | * ubi_debugfs_exit - remove UBI debugfs directory. | |
284 | */ | |
285 | void ubi_debugfs_exit(void) | |
286 | { | |
903e0e4e | 287 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
e9b4cf20 | 288 | debugfs_remove(dfs_rootdir); |
2a734bb8 AB |
289 | } |
290 | ||
291 | /* Read an UBI debugfs file */ | |
292 | static ssize_t dfs_file_read(struct file *file, char __user *user_buf, | |
293 | size_t count, loff_t *ppos) | |
294 | { | |
295 | unsigned long ubi_num = (unsigned long)file->private_data; | |
296 | struct dentry *dent = file->f_path.dentry; | |
297 | struct ubi_device *ubi; | |
298 | struct ubi_debug_info *d; | |
299 | char buf[3]; | |
300 | int val; | |
301 | ||
302 | ubi = ubi_get_device(ubi_num); | |
303 | if (!ubi) | |
304 | return -ENODEV; | |
305 | d = ubi->dbg; | |
306 | ||
307 | if (dent == d->dfs_chk_gen) | |
308 | val = d->chk_gen; | |
309 | else if (dent == d->dfs_chk_io) | |
310 | val = d->chk_io; | |
cd6d8567 AB |
311 | else if (dent == d->dfs_disable_bgt) |
312 | val = d->disable_bgt; | |
313 | else if (dent == d->dfs_emulate_bitflips) | |
314 | val = d->emulate_bitflips; | |
315 | else if (dent == d->dfs_emulate_io_failures) | |
316 | val = d->emulate_io_failures; | |
2a734bb8 AB |
317 | else { |
318 | count = -EINVAL; | |
319 | goto out; | |
320 | } | |
321 | ||
322 | if (val) | |
323 | buf[0] = '1'; | |
324 | else | |
325 | buf[0] = '0'; | |
326 | buf[1] = '\n'; | |
327 | buf[2] = 0x00; | |
328 | ||
329 | count = simple_read_from_buffer(user_buf, count, ppos, buf, 2); | |
330 | ||
331 | out: | |
332 | ubi_put_device(ubi); | |
333 | return count; | |
334 | } | |
335 | ||
336 | /* Write an UBI debugfs file */ | |
337 | static ssize_t dfs_file_write(struct file *file, const char __user *user_buf, | |
338 | size_t count, loff_t *ppos) | |
339 | { | |
340 | unsigned long ubi_num = (unsigned long)file->private_data; | |
341 | struct dentry *dent = file->f_path.dentry; | |
342 | struct ubi_device *ubi; | |
343 | struct ubi_debug_info *d; | |
344 | size_t buf_size; | |
345 | char buf[8]; | |
346 | int val; | |
347 | ||
348 | ubi = ubi_get_device(ubi_num); | |
349 | if (!ubi) | |
350 | return -ENODEV; | |
351 | d = ubi->dbg; | |
352 | ||
353 | buf_size = min_t(size_t, count, (sizeof(buf) - 1)); | |
354 | if (copy_from_user(buf, user_buf, buf_size)) { | |
355 | count = -EFAULT; | |
356 | goto out; | |
357 | } | |
358 | ||
359 | if (buf[0] == '1') | |
360 | val = 1; | |
361 | else if (buf[0] == '0') | |
362 | val = 0; | |
363 | else { | |
364 | count = -EINVAL; | |
365 | goto out; | |
366 | } | |
367 | ||
368 | if (dent == d->dfs_chk_gen) | |
369 | d->chk_gen = val; | |
370 | else if (dent == d->dfs_chk_io) | |
371 | d->chk_io = val; | |
cd6d8567 AB |
372 | else if (dent == d->dfs_disable_bgt) |
373 | d->disable_bgt = val; | |
374 | else if (dent == d->dfs_emulate_bitflips) | |
375 | d->emulate_bitflips = val; | |
376 | else if (dent == d->dfs_emulate_io_failures) | |
377 | d->emulate_io_failures = val; | |
2a734bb8 AB |
378 | else |
379 | count = -EINVAL; | |
380 | ||
381 | out: | |
382 | ubi_put_device(ubi); | |
383 | return count; | |
384 | } | |
385 | ||
2a734bb8 AB |
386 | /* File operations for all UBI debugfs files */ |
387 | static const struct file_operations dfs_fops = { | |
388 | .read = dfs_file_read, | |
389 | .write = dfs_file_write, | |
234e3405 | 390 | .open = simple_open, |
2a734bb8 AB |
391 | .llseek = no_llseek, |
392 | .owner = THIS_MODULE, | |
393 | }; | |
394 | ||
395 | /** | |
396 | * ubi_debugfs_init_dev - initialize debugfs for an UBI device. | |
397 | * @ubi: UBI device description object | |
398 | * | |
399 | * This function creates all debugfs files for UBI device @ubi. Returns zero in | |
400 | * case of success and a negative error code in case of failure. | |
401 | */ | |
402 | int ubi_debugfs_init_dev(struct ubi_device *ubi) | |
403 | { | |
404 | int err, n; | |
405 | unsigned long ubi_num = ubi->ubi_num; | |
406 | const char *fname; | |
407 | struct dentry *dent; | |
408 | struct ubi_debug_info *d = ubi->dbg; | |
409 | ||
903e0e4e | 410 | if (!IS_ENABLED(CONFIG_DEBUG_FS)) |
e9b4cf20 AB |
411 | return 0; |
412 | ||
2a734bb8 AB |
413 | n = snprintf(d->dfs_dir_name, UBI_DFS_DIR_LEN + 1, UBI_DFS_DIR_NAME, |
414 | ubi->ubi_num); | |
415 | if (n == UBI_DFS_DIR_LEN) { | |
416 | /* The array size is too small */ | |
417 | fname = UBI_DFS_DIR_NAME; | |
418 | dent = ERR_PTR(-EINVAL); | |
419 | goto out; | |
420 | } | |
421 | ||
422 | fname = d->dfs_dir_name; | |
423 | dent = debugfs_create_dir(fname, dfs_rootdir); | |
424 | if (IS_ERR_OR_NULL(dent)) | |
425 | goto out; | |
426 | d->dfs_dir = dent; | |
427 | ||
428 | fname = "chk_gen"; | |
429 | dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num, | |
430 | &dfs_fops); | |
431 | if (IS_ERR_OR_NULL(dent)) | |
432 | goto out_remove; | |
433 | d->dfs_chk_gen = dent; | |
434 | ||
435 | fname = "chk_io"; | |
436 | dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num, | |
437 | &dfs_fops); | |
438 | if (IS_ERR_OR_NULL(dent)) | |
439 | goto out_remove; | |
440 | d->dfs_chk_io = dent; | |
441 | ||
cd6d8567 AB |
442 | fname = "tst_disable_bgt"; |
443 | dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num, | |
444 | &dfs_fops); | |
445 | if (IS_ERR_OR_NULL(dent)) | |
446 | goto out_remove; | |
447 | d->dfs_disable_bgt = dent; | |
448 | ||
449 | fname = "tst_emulate_bitflips"; | |
450 | dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num, | |
451 | &dfs_fops); | |
452 | if (IS_ERR_OR_NULL(dent)) | |
453 | goto out_remove; | |
454 | d->dfs_emulate_bitflips = dent; | |
455 | ||
456 | fname = "tst_emulate_io_failures"; | |
457 | dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, (void *)ubi_num, | |
458 | &dfs_fops); | |
459 | if (IS_ERR_OR_NULL(dent)) | |
460 | goto out_remove; | |
461 | d->dfs_emulate_io_failures = dent; | |
462 | ||
2a734bb8 AB |
463 | return 0; |
464 | ||
465 | out_remove: | |
466 | debugfs_remove_recursive(d->dfs_dir); | |
467 | out: | |
468 | err = dent ? PTR_ERR(dent) : -ENODEV; | |
469 | ubi_err("cannot create \"%s\" debugfs file or directory, error %d\n", | |
470 | fname, err); | |
471 | return err; | |
472 | } | |
473 | ||
474 | /** | |
475 | * dbg_debug_exit_dev - free all debugfs files corresponding to device @ubi | |
476 | * @ubi: UBI device description object | |
477 | */ | |
478 | void ubi_debugfs_exit_dev(struct ubi_device *ubi) | |
479 | { | |
903e0e4e | 480 | if (IS_ENABLED(CONFIG_DEBUG_FS)) |
e9b4cf20 | 481 | debugfs_remove_recursive(ubi->dbg->dfs_dir); |
2a734bb8 | 482 | } |