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c1d7c514 | 1 | // SPDX-License-Identifier: GPL-2.0 |
6cbd5570 CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
6cbd5570 CM |
4 | */ |
5 | ||
58176a96 JB |
6 | #include <linux/sched.h> |
7 | #include <linux/slab.h> | |
8 | #include <linux/spinlock.h> | |
9 | #include <linux/completion.h> | |
58176a96 | 10 | #include <linux/kobject.h> |
79da4fa4 | 11 | #include <linux/bug.h> |
1bae3098 | 12 | #include <linux/debugfs.h> |
58176a96 | 13 | |
bae45de0 CM |
14 | #include "ctree.h" |
15 | #include "disk-io.h" | |
16 | #include "transaction.h" | |
079b72bc | 17 | #include "sysfs.h" |
29e5be24 | 18 | #include "volumes.h" |
079b72bc | 19 | |
510d7360 | 20 | static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj); |
2e7910d6 | 21 | static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj); |
5ac1d209 | 22 | |
510d7360 JM |
23 | static u64 get_features(struct btrfs_fs_info *fs_info, |
24 | enum btrfs_feature_set set) | |
5ac1d209 | 25 | { |
510d7360 JM |
26 | struct btrfs_super_block *disk_super = fs_info->super_copy; |
27 | if (set == FEAT_COMPAT) | |
28 | return btrfs_super_compat_flags(disk_super); | |
29 | else if (set == FEAT_COMPAT_RO) | |
30 | return btrfs_super_compat_ro_flags(disk_super); | |
31 | else | |
32 | return btrfs_super_incompat_flags(disk_super); | |
5ac1d209 JM |
33 | } |
34 | ||
ba631941 JM |
35 | static void set_features(struct btrfs_fs_info *fs_info, |
36 | enum btrfs_feature_set set, u64 features) | |
37 | { | |
38 | struct btrfs_super_block *disk_super = fs_info->super_copy; | |
39 | if (set == FEAT_COMPAT) | |
40 | btrfs_set_super_compat_flags(disk_super, features); | |
41 | else if (set == FEAT_COMPAT_RO) | |
42 | btrfs_set_super_compat_ro_flags(disk_super, features); | |
43 | else | |
44 | btrfs_set_super_incompat_flags(disk_super, features); | |
45 | } | |
46 | ||
47 | static int can_modify_feature(struct btrfs_feature_attr *fa) | |
48 | { | |
49 | int val = 0; | |
50 | u64 set, clear; | |
51 | switch (fa->feature_set) { | |
52 | case FEAT_COMPAT: | |
53 | set = BTRFS_FEATURE_COMPAT_SAFE_SET; | |
54 | clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR; | |
55 | break; | |
56 | case FEAT_COMPAT_RO: | |
57 | set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET; | |
58 | clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR; | |
59 | break; | |
60 | case FEAT_INCOMPAT: | |
61 | set = BTRFS_FEATURE_INCOMPAT_SAFE_SET; | |
62 | clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR; | |
63 | break; | |
64 | default: | |
62e85577 | 65 | pr_warn("btrfs: sysfs: unknown feature set %d\n", |
cc37bb04 DS |
66 | fa->feature_set); |
67 | return 0; | |
ba631941 JM |
68 | } |
69 | ||
70 | if (set & fa->feature_bit) | |
71 | val |= 1; | |
72 | if (clear & fa->feature_bit) | |
73 | val |= 2; | |
74 | ||
75 | return val; | |
76 | } | |
77 | ||
510d7360 JM |
78 | static ssize_t btrfs_feature_attr_show(struct kobject *kobj, |
79 | struct kobj_attribute *a, char *buf) | |
5ac1d209 | 80 | { |
510d7360 | 81 | int val = 0; |
5ac1d209 | 82 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); |
ba631941 | 83 | struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a); |
510d7360 | 84 | if (fs_info) { |
510d7360 JM |
85 | u64 features = get_features(fs_info, fa->feature_set); |
86 | if (features & fa->feature_bit) | |
87 | val = 1; | |
ba631941 JM |
88 | } else |
89 | val = can_modify_feature(fa); | |
510d7360 JM |
90 | |
91 | return snprintf(buf, PAGE_SIZE, "%d\n", val); | |
5ac1d209 JM |
92 | } |
93 | ||
ba631941 JM |
94 | static ssize_t btrfs_feature_attr_store(struct kobject *kobj, |
95 | struct kobj_attribute *a, | |
96 | const char *buf, size_t count) | |
97 | { | |
98 | struct btrfs_fs_info *fs_info; | |
99 | struct btrfs_feature_attr *fa = to_btrfs_feature_attr(a); | |
ba631941 JM |
100 | u64 features, set, clear; |
101 | unsigned long val; | |
102 | int ret; | |
103 | ||
104 | fs_info = to_fs_info(kobj); | |
105 | if (!fs_info) | |
106 | return -EPERM; | |
107 | ||
bc98a42c | 108 | if (sb_rdonly(fs_info->sb)) |
ee611138 DS |
109 | return -EROFS; |
110 | ||
ba631941 JM |
111 | ret = kstrtoul(skip_spaces(buf), 0, &val); |
112 | if (ret) | |
113 | return ret; | |
114 | ||
115 | if (fa->feature_set == FEAT_COMPAT) { | |
116 | set = BTRFS_FEATURE_COMPAT_SAFE_SET; | |
117 | clear = BTRFS_FEATURE_COMPAT_SAFE_CLEAR; | |
118 | } else if (fa->feature_set == FEAT_COMPAT_RO) { | |
119 | set = BTRFS_FEATURE_COMPAT_RO_SAFE_SET; | |
120 | clear = BTRFS_FEATURE_COMPAT_RO_SAFE_CLEAR; | |
121 | } else { | |
122 | set = BTRFS_FEATURE_INCOMPAT_SAFE_SET; | |
123 | clear = BTRFS_FEATURE_INCOMPAT_SAFE_CLEAR; | |
124 | } | |
125 | ||
126 | features = get_features(fs_info, fa->feature_set); | |
127 | ||
128 | /* Nothing to do */ | |
129 | if ((val && (features & fa->feature_bit)) || | |
130 | (!val && !(features & fa->feature_bit))) | |
131 | return count; | |
132 | ||
133 | if ((val && !(set & fa->feature_bit)) || | |
134 | (!val && !(clear & fa->feature_bit))) { | |
135 | btrfs_info(fs_info, | |
136 | "%sabling feature %s on mounted fs is not supported.", | |
137 | val ? "En" : "Dis", fa->kobj_attr.attr.name); | |
138 | return -EPERM; | |
139 | } | |
140 | ||
141 | btrfs_info(fs_info, "%s %s feature flag", | |
142 | val ? "Setting" : "Clearing", fa->kobj_attr.attr.name); | |
143 | ||
ba631941 JM |
144 | spin_lock(&fs_info->super_lock); |
145 | features = get_features(fs_info, fa->feature_set); | |
146 | if (val) | |
147 | features |= fa->feature_bit; | |
148 | else | |
149 | features &= ~fa->feature_bit; | |
150 | set_features(fs_info, fa->feature_set, features); | |
151 | spin_unlock(&fs_info->super_lock); | |
152 | ||
0eae2747 DS |
153 | /* |
154 | * We don't want to do full transaction commit from inside sysfs | |
155 | */ | |
156 | btrfs_set_pending(fs_info, COMMIT); | |
157 | wake_up_process(fs_info->transaction_kthread); | |
ba631941 JM |
158 | |
159 | return count; | |
160 | } | |
161 | ||
510d7360 JM |
162 | static umode_t btrfs_feature_visible(struct kobject *kobj, |
163 | struct attribute *attr, int unused) | |
079b72bc | 164 | { |
510d7360 JM |
165 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); |
166 | umode_t mode = attr->mode; | |
167 | ||
168 | if (fs_info) { | |
169 | struct btrfs_feature_attr *fa; | |
170 | u64 features; | |
171 | ||
172 | fa = attr_to_btrfs_feature_attr(attr); | |
173 | features = get_features(fs_info, fa->feature_set); | |
174 | ||
ba631941 JM |
175 | if (can_modify_feature(fa)) |
176 | mode |= S_IWUSR; | |
177 | else if (!(features & fa->feature_bit)) | |
510d7360 JM |
178 | mode = 0; |
179 | } | |
180 | ||
181 | return mode; | |
079b72bc JM |
182 | } |
183 | ||
184 | BTRFS_FEAT_ATTR_INCOMPAT(mixed_backref, MIXED_BACKREF); | |
185 | BTRFS_FEAT_ATTR_INCOMPAT(default_subvol, DEFAULT_SUBVOL); | |
186 | BTRFS_FEAT_ATTR_INCOMPAT(mixed_groups, MIXED_GROUPS); | |
187 | BTRFS_FEAT_ATTR_INCOMPAT(compress_lzo, COMPRESS_LZO); | |
5c1aab1d | 188 | BTRFS_FEAT_ATTR_INCOMPAT(compress_zstd, COMPRESS_ZSTD); |
079b72bc JM |
189 | BTRFS_FEAT_ATTR_INCOMPAT(big_metadata, BIG_METADATA); |
190 | BTRFS_FEAT_ATTR_INCOMPAT(extended_iref, EXTENDED_IREF); | |
191 | BTRFS_FEAT_ATTR_INCOMPAT(raid56, RAID56); | |
192 | BTRFS_FEAT_ATTR_INCOMPAT(skinny_metadata, SKINNY_METADATA); | |
c736c095 | 193 | BTRFS_FEAT_ATTR_INCOMPAT(no_holes, NO_HOLES); |
56f20f40 | 194 | BTRFS_FEAT_ATTR_INCOMPAT(metadata_uuid, METADATA_UUID); |
3b5bb73b | 195 | BTRFS_FEAT_ATTR_COMPAT_RO(free_space_tree, FREE_SPACE_TREE); |
079b72bc JM |
196 | |
197 | static struct attribute *btrfs_supported_feature_attrs[] = { | |
198 | BTRFS_FEAT_ATTR_PTR(mixed_backref), | |
199 | BTRFS_FEAT_ATTR_PTR(default_subvol), | |
200 | BTRFS_FEAT_ATTR_PTR(mixed_groups), | |
201 | BTRFS_FEAT_ATTR_PTR(compress_lzo), | |
5c1aab1d | 202 | BTRFS_FEAT_ATTR_PTR(compress_zstd), |
079b72bc JM |
203 | BTRFS_FEAT_ATTR_PTR(big_metadata), |
204 | BTRFS_FEAT_ATTR_PTR(extended_iref), | |
205 | BTRFS_FEAT_ATTR_PTR(raid56), | |
206 | BTRFS_FEAT_ATTR_PTR(skinny_metadata), | |
c736c095 | 207 | BTRFS_FEAT_ATTR_PTR(no_holes), |
56f20f40 | 208 | BTRFS_FEAT_ATTR_PTR(metadata_uuid), |
3b5bb73b | 209 | BTRFS_FEAT_ATTR_PTR(free_space_tree), |
079b72bc JM |
210 | NULL |
211 | }; | |
212 | ||
f902bd3a MT |
213 | /* |
214 | * Features which depend on feature bits and may differ between each fs. | |
215 | * | |
216 | * /sys/fs/btrfs/features lists all available features of this kernel while | |
217 | * /sys/fs/btrfs/UUID/features shows features of the fs which are enabled or | |
218 | * can be changed online. | |
219 | */ | |
079b72bc JM |
220 | static const struct attribute_group btrfs_feature_attr_group = { |
221 | .name = "features", | |
510d7360 | 222 | .is_visible = btrfs_feature_visible, |
079b72bc JM |
223 | .attrs = btrfs_supported_feature_attrs, |
224 | }; | |
58176a96 | 225 | |
f902bd3a MT |
226 | static ssize_t rmdir_subvol_show(struct kobject *kobj, |
227 | struct kobj_attribute *ka, char *buf) | |
228 | { | |
229 | return snprintf(buf, PAGE_SIZE, "0\n"); | |
230 | } | |
231 | BTRFS_ATTR(static_feature, rmdir_subvol, rmdir_subvol_show); | |
232 | ||
233 | static struct attribute *btrfs_supported_static_feature_attrs[] = { | |
234 | BTRFS_ATTR_PTR(static_feature, rmdir_subvol), | |
235 | NULL | |
236 | }; | |
237 | ||
238 | /* | |
239 | * Features which only depend on kernel version. | |
240 | * | |
241 | * These are listed in /sys/fs/btrfs/features along with | |
242 | * btrfs_feature_attr_group | |
243 | */ | |
244 | static const struct attribute_group btrfs_static_feature_attr_group = { | |
245 | .name = "features", | |
246 | .attrs = btrfs_supported_static_feature_attrs, | |
247 | }; | |
248 | ||
6ab0a202 JM |
249 | static ssize_t btrfs_show_u64(u64 *value_ptr, spinlock_t *lock, char *buf) |
250 | { | |
251 | u64 val; | |
252 | if (lock) | |
253 | spin_lock(lock); | |
254 | val = *value_ptr; | |
255 | if (lock) | |
256 | spin_unlock(lock); | |
257 | return snprintf(buf, PAGE_SIZE, "%llu\n", val); | |
258 | } | |
259 | ||
260 | static ssize_t global_rsv_size_show(struct kobject *kobj, | |
261 | struct kobj_attribute *ka, char *buf) | |
262 | { | |
263 | struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent); | |
264 | struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; | |
265 | return btrfs_show_u64(&block_rsv->size, &block_rsv->lock, buf); | |
266 | } | |
a969f4cc | 267 | BTRFS_ATTR(allocation, global_rsv_size, global_rsv_size_show); |
6ab0a202 JM |
268 | |
269 | static ssize_t global_rsv_reserved_show(struct kobject *kobj, | |
270 | struct kobj_attribute *a, char *buf) | |
271 | { | |
272 | struct btrfs_fs_info *fs_info = to_fs_info(kobj->parent); | |
273 | struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; | |
274 | return btrfs_show_u64(&block_rsv->reserved, &block_rsv->lock, buf); | |
275 | } | |
a969f4cc | 276 | BTRFS_ATTR(allocation, global_rsv_reserved, global_rsv_reserved_show); |
6ab0a202 JM |
277 | |
278 | #define to_space_info(_kobj) container_of(_kobj, struct btrfs_space_info, kobj) | |
c1895442 | 279 | #define to_raid_kobj(_kobj) container_of(_kobj, struct raid_kobject, kobj) |
6ab0a202 JM |
280 | |
281 | static ssize_t raid_bytes_show(struct kobject *kobj, | |
282 | struct kobj_attribute *attr, char *buf); | |
a969f4cc HK |
283 | BTRFS_ATTR(raid, total_bytes, raid_bytes_show); |
284 | BTRFS_ATTR(raid, used_bytes, raid_bytes_show); | |
6ab0a202 JM |
285 | |
286 | static ssize_t raid_bytes_show(struct kobject *kobj, | |
287 | struct kobj_attribute *attr, char *buf) | |
288 | ||
289 | { | |
290 | struct btrfs_space_info *sinfo = to_space_info(kobj->parent); | |
291 | struct btrfs_block_group_cache *block_group; | |
75cb379d | 292 | int index = btrfs_bg_flags_to_raid_index(to_raid_kobj(kobj)->flags); |
6ab0a202 JM |
293 | u64 val = 0; |
294 | ||
295 | down_read(&sinfo->groups_sem); | |
296 | list_for_each_entry(block_group, &sinfo->block_groups[index], list) { | |
a969f4cc | 297 | if (&attr->attr == BTRFS_ATTR_PTR(raid, total_bytes)) |
6ab0a202 JM |
298 | val += block_group->key.offset; |
299 | else | |
300 | val += btrfs_block_group_used(&block_group->item); | |
301 | } | |
302 | up_read(&sinfo->groups_sem); | |
303 | return snprintf(buf, PAGE_SIZE, "%llu\n", val); | |
304 | } | |
305 | ||
306 | static struct attribute *raid_attributes[] = { | |
a969f4cc HK |
307 | BTRFS_ATTR_PTR(raid, total_bytes), |
308 | BTRFS_ATTR_PTR(raid, used_bytes), | |
6ab0a202 JM |
309 | NULL |
310 | }; | |
311 | ||
312 | static void release_raid_kobj(struct kobject *kobj) | |
313 | { | |
c1895442 | 314 | kfree(to_raid_kobj(kobj)); |
6ab0a202 JM |
315 | } |
316 | ||
317 | struct kobj_type btrfs_raid_ktype = { | |
318 | .sysfs_ops = &kobj_sysfs_ops, | |
319 | .release = release_raid_kobj, | |
320 | .default_attrs = raid_attributes, | |
321 | }; | |
322 | ||
323 | #define SPACE_INFO_ATTR(field) \ | |
324 | static ssize_t btrfs_space_info_show_##field(struct kobject *kobj, \ | |
325 | struct kobj_attribute *a, \ | |
326 | char *buf) \ | |
327 | { \ | |
328 | struct btrfs_space_info *sinfo = to_space_info(kobj); \ | |
329 | return btrfs_show_u64(&sinfo->field, &sinfo->lock, buf); \ | |
330 | } \ | |
a969f4cc | 331 | BTRFS_ATTR(space_info, field, btrfs_space_info_show_##field) |
6ab0a202 JM |
332 | |
333 | static ssize_t btrfs_space_info_show_total_bytes_pinned(struct kobject *kobj, | |
334 | struct kobj_attribute *a, | |
335 | char *buf) | |
336 | { | |
337 | struct btrfs_space_info *sinfo = to_space_info(kobj); | |
338 | s64 val = percpu_counter_sum(&sinfo->total_bytes_pinned); | |
339 | return snprintf(buf, PAGE_SIZE, "%lld\n", val); | |
340 | } | |
341 | ||
342 | SPACE_INFO_ATTR(flags); | |
343 | SPACE_INFO_ATTR(total_bytes); | |
344 | SPACE_INFO_ATTR(bytes_used); | |
345 | SPACE_INFO_ATTR(bytes_pinned); | |
346 | SPACE_INFO_ATTR(bytes_reserved); | |
347 | SPACE_INFO_ATTR(bytes_may_use); | |
c1fd5c30 | 348 | SPACE_INFO_ATTR(bytes_readonly); |
6ab0a202 JM |
349 | SPACE_INFO_ATTR(disk_used); |
350 | SPACE_INFO_ATTR(disk_total); | |
a969f4cc HK |
351 | BTRFS_ATTR(space_info, total_bytes_pinned, |
352 | btrfs_space_info_show_total_bytes_pinned); | |
6ab0a202 JM |
353 | |
354 | static struct attribute *space_info_attrs[] = { | |
a969f4cc HK |
355 | BTRFS_ATTR_PTR(space_info, flags), |
356 | BTRFS_ATTR_PTR(space_info, total_bytes), | |
357 | BTRFS_ATTR_PTR(space_info, bytes_used), | |
358 | BTRFS_ATTR_PTR(space_info, bytes_pinned), | |
359 | BTRFS_ATTR_PTR(space_info, bytes_reserved), | |
360 | BTRFS_ATTR_PTR(space_info, bytes_may_use), | |
361 | BTRFS_ATTR_PTR(space_info, bytes_readonly), | |
362 | BTRFS_ATTR_PTR(space_info, disk_used), | |
363 | BTRFS_ATTR_PTR(space_info, disk_total), | |
364 | BTRFS_ATTR_PTR(space_info, total_bytes_pinned), | |
6ab0a202 JM |
365 | NULL, |
366 | }; | |
367 | ||
368 | static void space_info_release(struct kobject *kobj) | |
369 | { | |
370 | struct btrfs_space_info *sinfo = to_space_info(kobj); | |
371 | percpu_counter_destroy(&sinfo->total_bytes_pinned); | |
372 | kfree(sinfo); | |
373 | } | |
374 | ||
375 | struct kobj_type space_info_ktype = { | |
376 | .sysfs_ops = &kobj_sysfs_ops, | |
377 | .release = space_info_release, | |
378 | .default_attrs = space_info_attrs, | |
379 | }; | |
380 | ||
381 | static const struct attribute *allocation_attrs[] = { | |
a969f4cc HK |
382 | BTRFS_ATTR_PTR(allocation, global_rsv_reserved), |
383 | BTRFS_ATTR_PTR(allocation, global_rsv_size), | |
6ab0a202 JM |
384 | NULL, |
385 | }; | |
386 | ||
f8ba9c11 JM |
387 | static ssize_t btrfs_label_show(struct kobject *kobj, |
388 | struct kobj_attribute *a, char *buf) | |
389 | { | |
390 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
48fcc3ff | 391 | char *label = fs_info->super_copy->label; |
ee17fc80 DS |
392 | ssize_t ret; |
393 | ||
394 | spin_lock(&fs_info->super_lock); | |
395 | ret = snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); | |
396 | spin_unlock(&fs_info->super_lock); | |
397 | ||
398 | return ret; | |
f8ba9c11 JM |
399 | } |
400 | ||
401 | static ssize_t btrfs_label_store(struct kobject *kobj, | |
402 | struct kobj_attribute *a, | |
403 | const char *buf, size_t len) | |
404 | { | |
405 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
48fcc3ff | 406 | size_t p_len; |
f8ba9c11 | 407 | |
66ac9fe7 DS |
408 | if (!fs_info) |
409 | return -EPERM; | |
410 | ||
bc98a42c | 411 | if (sb_rdonly(fs_info->sb)) |
79aec2b8 AJ |
412 | return -EROFS; |
413 | ||
48fcc3ff ST |
414 | /* |
415 | * p_len is the len until the first occurrence of either | |
416 | * '\n' or '\0' | |
417 | */ | |
418 | p_len = strcspn(buf, "\n"); | |
419 | ||
420 | if (p_len >= BTRFS_LABEL_SIZE) | |
f8ba9c11 | 421 | return -EINVAL; |
f8ba9c11 | 422 | |
a6f69dc8 | 423 | spin_lock(&fs_info->super_lock); |
48fcc3ff ST |
424 | memset(fs_info->super_copy->label, 0, BTRFS_LABEL_SIZE); |
425 | memcpy(fs_info->super_copy->label, buf, p_len); | |
a6f69dc8 | 426 | spin_unlock(&fs_info->super_lock); |
f8ba9c11 | 427 | |
a6f69dc8 DS |
428 | /* |
429 | * We don't want to do full transaction commit from inside sysfs | |
430 | */ | |
431 | btrfs_set_pending(fs_info, COMMIT); | |
432 | wake_up_process(fs_info->transaction_kthread); | |
f8ba9c11 | 433 | |
a6f69dc8 | 434 | return len; |
f8ba9c11 | 435 | } |
a969f4cc | 436 | BTRFS_ATTR_RW(, label, btrfs_label_show, btrfs_label_store); |
f8ba9c11 | 437 | |
df93589a DS |
438 | static ssize_t btrfs_nodesize_show(struct kobject *kobj, |
439 | struct kobj_attribute *a, char *buf) | |
440 | { | |
441 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
442 | ||
093e037c | 443 | return snprintf(buf, PAGE_SIZE, "%u\n", fs_info->super_copy->nodesize); |
df93589a DS |
444 | } |
445 | ||
a969f4cc | 446 | BTRFS_ATTR(, nodesize, btrfs_nodesize_show); |
df93589a DS |
447 | |
448 | static ssize_t btrfs_sectorsize_show(struct kobject *kobj, | |
449 | struct kobj_attribute *a, char *buf) | |
450 | { | |
451 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
452 | ||
093e037c DS |
453 | return snprintf(buf, PAGE_SIZE, "%u\n", |
454 | fs_info->super_copy->sectorsize); | |
df93589a DS |
455 | } |
456 | ||
a969f4cc | 457 | BTRFS_ATTR(, sectorsize, btrfs_sectorsize_show); |
df93589a DS |
458 | |
459 | static ssize_t btrfs_clone_alignment_show(struct kobject *kobj, | |
460 | struct kobj_attribute *a, char *buf) | |
461 | { | |
462 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
463 | ||
093e037c DS |
464 | return snprintf(buf, PAGE_SIZE, "%u\n", |
465 | fs_info->super_copy->sectorsize); | |
df93589a DS |
466 | } |
467 | ||
a969f4cc | 468 | BTRFS_ATTR(, clone_alignment, btrfs_clone_alignment_show); |
df93589a | 469 | |
2723480a SD |
470 | static ssize_t quota_override_show(struct kobject *kobj, |
471 | struct kobj_attribute *a, char *buf) | |
472 | { | |
473 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
474 | int quota_override; | |
475 | ||
476 | quota_override = test_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); | |
477 | return snprintf(buf, PAGE_SIZE, "%d\n", quota_override); | |
478 | } | |
479 | ||
480 | static ssize_t quota_override_store(struct kobject *kobj, | |
481 | struct kobj_attribute *a, | |
482 | const char *buf, size_t len) | |
483 | { | |
484 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
485 | unsigned long knob; | |
486 | int err; | |
487 | ||
488 | if (!fs_info) | |
489 | return -EPERM; | |
490 | ||
491 | if (!capable(CAP_SYS_RESOURCE)) | |
492 | return -EPERM; | |
493 | ||
494 | err = kstrtoul(buf, 10, &knob); | |
495 | if (err) | |
496 | return err; | |
497 | if (knob > 1) | |
498 | return -EINVAL; | |
499 | ||
500 | if (knob) | |
501 | set_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); | |
502 | else | |
503 | clear_bit(BTRFS_FS_QUOTA_OVERRIDE, &fs_info->flags); | |
504 | ||
505 | return len; | |
506 | } | |
507 | ||
a969f4cc | 508 | BTRFS_ATTR_RW(, quota_override, quota_override_show, quota_override_store); |
2723480a | 509 | |
56f20f40 NB |
510 | static ssize_t btrfs_metadata_uuid_show(struct kobject *kobj, |
511 | struct kobj_attribute *a, char *buf) | |
512 | { | |
513 | struct btrfs_fs_info *fs_info = to_fs_info(kobj); | |
514 | ||
515 | return snprintf(buf, PAGE_SIZE, "%pU\n", | |
516 | fs_info->fs_devices->metadata_uuid); | |
517 | } | |
518 | ||
519 | BTRFS_ATTR(, metadata_uuid, btrfs_metadata_uuid_show); | |
520 | ||
0dd2906f | 521 | static const struct attribute *btrfs_attrs[] = { |
a969f4cc HK |
522 | BTRFS_ATTR_PTR(, label), |
523 | BTRFS_ATTR_PTR(, nodesize), | |
524 | BTRFS_ATTR_PTR(, sectorsize), | |
525 | BTRFS_ATTR_PTR(, clone_alignment), | |
526 | BTRFS_ATTR_PTR(, quota_override), | |
56f20f40 | 527 | BTRFS_ATTR_PTR(, metadata_uuid), |
f8ba9c11 JM |
528 | NULL, |
529 | }; | |
530 | ||
c1b7e474 | 531 | static void btrfs_release_fsid_kobj(struct kobject *kobj) |
510d7360 | 532 | { |
2e7910d6 | 533 | struct btrfs_fs_devices *fs_devs = to_fs_devs(kobj); |
248d200d | 534 | |
c1b7e474 | 535 | memset(&fs_devs->fsid_kobj, 0, sizeof(struct kobject)); |
2e7910d6 | 536 | complete(&fs_devs->kobj_unregister); |
510d7360 JM |
537 | } |
538 | ||
539 | static struct kobj_type btrfs_ktype = { | |
540 | .sysfs_ops = &kobj_sysfs_ops, | |
c1b7e474 | 541 | .release = btrfs_release_fsid_kobj, |
510d7360 JM |
542 | }; |
543 | ||
2e7910d6 AJ |
544 | static inline struct btrfs_fs_devices *to_fs_devs(struct kobject *kobj) |
545 | { | |
546 | if (kobj->ktype != &btrfs_ktype) | |
547 | return NULL; | |
c1b7e474 | 548 | return container_of(kobj, struct btrfs_fs_devices, fsid_kobj); |
2e7910d6 AJ |
549 | } |
550 | ||
510d7360 JM |
551 | static inline struct btrfs_fs_info *to_fs_info(struct kobject *kobj) |
552 | { | |
553 | if (kobj->ktype != &btrfs_ktype) | |
554 | return NULL; | |
2e7910d6 | 555 | return to_fs_devs(kobj)->fs_info; |
510d7360 | 556 | } |
58176a96 | 557 | |
e453d989 | 558 | #define NUM_FEATURE_BITS 64 |
6c52157f TM |
559 | #define BTRFS_FEATURE_NAME_MAX 13 |
560 | static char btrfs_unknown_feature_names[FEAT_MAX][NUM_FEATURE_BITS][BTRFS_FEATURE_NAME_MAX]; | |
561 | static struct btrfs_feature_attr btrfs_feature_attrs[FEAT_MAX][NUM_FEATURE_BITS]; | |
e453d989 | 562 | |
6c52157f | 563 | static const u64 supported_feature_masks[FEAT_MAX] = { |
e453d989 JM |
564 | [FEAT_COMPAT] = BTRFS_FEATURE_COMPAT_SUPP, |
565 | [FEAT_COMPAT_RO] = BTRFS_FEATURE_COMPAT_RO_SUPP, | |
566 | [FEAT_INCOMPAT] = BTRFS_FEATURE_INCOMPAT_SUPP, | |
567 | }; | |
568 | ||
569 | static int addrm_unknown_feature_attrs(struct btrfs_fs_info *fs_info, bool add) | |
570 | { | |
571 | int set; | |
572 | ||
573 | for (set = 0; set < FEAT_MAX; set++) { | |
574 | int i; | |
575 | struct attribute *attrs[2]; | |
576 | struct attribute_group agroup = { | |
577 | .name = "features", | |
578 | .attrs = attrs, | |
579 | }; | |
580 | u64 features = get_features(fs_info, set); | |
581 | features &= ~supported_feature_masks[set]; | |
582 | ||
583 | if (!features) | |
584 | continue; | |
585 | ||
586 | attrs[1] = NULL; | |
587 | for (i = 0; i < NUM_FEATURE_BITS; i++) { | |
588 | struct btrfs_feature_attr *fa; | |
589 | ||
590 | if (!(features & (1ULL << i))) | |
591 | continue; | |
592 | ||
593 | fa = &btrfs_feature_attrs[set][i]; | |
594 | attrs[0] = &fa->kobj_attr.attr; | |
595 | if (add) { | |
596 | int ret; | |
c1b7e474 | 597 | ret = sysfs_merge_group(&fs_info->fs_devices->fsid_kobj, |
e453d989 JM |
598 | &agroup); |
599 | if (ret) | |
600 | return ret; | |
601 | } else | |
c1b7e474 | 602 | sysfs_unmerge_group(&fs_info->fs_devices->fsid_kobj, |
e453d989 JM |
603 | &agroup); |
604 | } | |
605 | ||
606 | } | |
607 | return 0; | |
608 | } | |
609 | ||
2e3e1281 | 610 | static void __btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) |
5ac1d209 | 611 | { |
2e7910d6 AJ |
612 | if (fs_devs->device_dir_kobj) { |
613 | kobject_del(fs_devs->device_dir_kobj); | |
614 | kobject_put(fs_devs->device_dir_kobj); | |
615 | fs_devs->device_dir_kobj = NULL; | |
aaf13305 AJ |
616 | } |
617 | ||
c1b7e474 AJ |
618 | if (fs_devs->fsid_kobj.state_initialized) { |
619 | kobject_del(&fs_devs->fsid_kobj); | |
620 | kobject_put(&fs_devs->fsid_kobj); | |
f90fc547 AJ |
621 | wait_for_completion(&fs_devs->kobj_unregister); |
622 | } | |
5ac1d209 JM |
623 | } |
624 | ||
2e3e1281 | 625 | /* when fs_devs is NULL it will remove all fsid kobject */ |
1d1c1be3 | 626 | void btrfs_sysfs_remove_fsid(struct btrfs_fs_devices *fs_devs) |
2e3e1281 AJ |
627 | { |
628 | struct list_head *fs_uuids = btrfs_get_fs_uuids(); | |
629 | ||
630 | if (fs_devs) { | |
631 | __btrfs_sysfs_remove_fsid(fs_devs); | |
632 | return; | |
633 | } | |
634 | ||
c4babc5e | 635 | list_for_each_entry(fs_devs, fs_uuids, fs_list) { |
2e3e1281 AJ |
636 | __btrfs_sysfs_remove_fsid(fs_devs); |
637 | } | |
638 | } | |
639 | ||
6618a59b | 640 | void btrfs_sysfs_remove_mounted(struct btrfs_fs_info *fs_info) |
e453d989 | 641 | { |
5a13f430 AJ |
642 | btrfs_reset_fs_info_ptr(fs_info); |
643 | ||
e453d989 JM |
644 | if (fs_info->space_info_kobj) { |
645 | sysfs_remove_files(fs_info->space_info_kobj, allocation_attrs); | |
646 | kobject_del(fs_info->space_info_kobj); | |
647 | kobject_put(fs_info->space_info_kobj); | |
648 | } | |
e453d989 | 649 | addrm_unknown_feature_attrs(fs_info, false); |
c1b7e474 AJ |
650 | sysfs_remove_group(&fs_info->fs_devices->fsid_kobj, &btrfs_feature_attr_group); |
651 | sysfs_remove_files(&fs_info->fs_devices->fsid_kobj, btrfs_attrs); | |
32576040 | 652 | btrfs_sysfs_rm_device_link(fs_info->fs_devices, NULL); |
e453d989 JM |
653 | } |
654 | ||
6c52157f | 655 | const char * const btrfs_feature_set_names[FEAT_MAX] = { |
79da4fa4 JM |
656 | [FEAT_COMPAT] = "compat", |
657 | [FEAT_COMPAT_RO] = "compat_ro", | |
658 | [FEAT_INCOMPAT] = "incompat", | |
659 | }; | |
660 | ||
3b02a68a JM |
661 | char *btrfs_printable_features(enum btrfs_feature_set set, u64 flags) |
662 | { | |
663 | size_t bufsize = 4096; /* safe max, 64 names * 64 bytes */ | |
664 | int len = 0; | |
665 | int i; | |
666 | char *str; | |
667 | ||
668 | str = kmalloc(bufsize, GFP_KERNEL); | |
669 | if (!str) | |
670 | return str; | |
671 | ||
672 | for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) { | |
673 | const char *name; | |
674 | ||
675 | if (!(flags & (1ULL << i))) | |
676 | continue; | |
677 | ||
678 | name = btrfs_feature_attrs[set][i].kobj_attr.attr.name; | |
679 | len += snprintf(str + len, bufsize - len, "%s%s", | |
680 | len ? "," : "", name); | |
681 | } | |
682 | ||
683 | return str; | |
684 | } | |
685 | ||
79da4fa4 JM |
686 | static void init_feature_attrs(void) |
687 | { | |
688 | struct btrfs_feature_attr *fa; | |
689 | int set, i; | |
690 | ||
691 | BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names) != | |
692 | ARRAY_SIZE(btrfs_feature_attrs)); | |
693 | BUILD_BUG_ON(ARRAY_SIZE(btrfs_unknown_feature_names[0]) != | |
694 | ARRAY_SIZE(btrfs_feature_attrs[0])); | |
695 | ||
3b02a68a JM |
696 | memset(btrfs_feature_attrs, 0, sizeof(btrfs_feature_attrs)); |
697 | memset(btrfs_unknown_feature_names, 0, | |
698 | sizeof(btrfs_unknown_feature_names)); | |
699 | ||
79da4fa4 JM |
700 | for (i = 0; btrfs_supported_feature_attrs[i]; i++) { |
701 | struct btrfs_feature_attr *sfa; | |
702 | struct attribute *a = btrfs_supported_feature_attrs[i]; | |
3b02a68a | 703 | int bit; |
79da4fa4 | 704 | sfa = attr_to_btrfs_feature_attr(a); |
3b02a68a JM |
705 | bit = ilog2(sfa->feature_bit); |
706 | fa = &btrfs_feature_attrs[sfa->feature_set][bit]; | |
79da4fa4 JM |
707 | |
708 | fa->kobj_attr.attr.name = sfa->kobj_attr.attr.name; | |
709 | } | |
710 | ||
711 | for (set = 0; set < FEAT_MAX; set++) { | |
712 | for (i = 0; i < ARRAY_SIZE(btrfs_feature_attrs[set]); i++) { | |
713 | char *name = btrfs_unknown_feature_names[set][i]; | |
714 | fa = &btrfs_feature_attrs[set][i]; | |
715 | ||
716 | if (fa->kobj_attr.attr.name) | |
717 | continue; | |
718 | ||
6c52157f | 719 | snprintf(name, BTRFS_FEATURE_NAME_MAX, "%s:%u", |
79da4fa4 JM |
720 | btrfs_feature_set_names[set], i); |
721 | ||
722 | fa->kobj_attr.attr.name = name; | |
723 | fa->kobj_attr.attr.mode = S_IRUGO; | |
724 | fa->feature_set = set; | |
725 | fa->feature_bit = 1ULL << i; | |
726 | } | |
727 | } | |
728 | } | |
729 | ||
e7e1aa9c AJ |
730 | /* when one_device is NULL, it removes all device links */ |
731 | ||
32576040 | 732 | int btrfs_sysfs_rm_device_link(struct btrfs_fs_devices *fs_devices, |
99994cde AJ |
733 | struct btrfs_device *one_device) |
734 | { | |
735 | struct hd_struct *disk; | |
736 | struct kobject *disk_kobj; | |
737 | ||
6c14a164 | 738 | if (!fs_devices->device_dir_kobj) |
99994cde AJ |
739 | return -EINVAL; |
740 | ||
87fa3bb0 | 741 | if (one_device && one_device->bdev) { |
99994cde AJ |
742 | disk = one_device->bdev->bd_part; |
743 | disk_kobj = &part_to_dev(disk)->kobj; | |
744 | ||
6c14a164 | 745 | sysfs_remove_link(fs_devices->device_dir_kobj, |
99994cde AJ |
746 | disk_kobj->name); |
747 | } | |
748 | ||
e7e1aa9c AJ |
749 | if (one_device) |
750 | return 0; | |
751 | ||
752 | list_for_each_entry(one_device, | |
6c14a164 | 753 | &fs_devices->devices, dev_list) { |
e7e1aa9c AJ |
754 | if (!one_device->bdev) |
755 | continue; | |
756 | disk = one_device->bdev->bd_part; | |
757 | disk_kobj = &part_to_dev(disk)->kobj; | |
758 | ||
6c14a164 | 759 | sysfs_remove_link(fs_devices->device_dir_kobj, |
e7e1aa9c AJ |
760 | disk_kobj->name); |
761 | } | |
762 | ||
99994cde AJ |
763 | return 0; |
764 | } | |
765 | ||
2e7910d6 | 766 | int btrfs_sysfs_add_device(struct btrfs_fs_devices *fs_devs) |
29e5be24 | 767 | { |
2e7910d6 AJ |
768 | if (!fs_devs->device_dir_kobj) |
769 | fs_devs->device_dir_kobj = kobject_create_and_add("devices", | |
c1b7e474 | 770 | &fs_devs->fsid_kobj); |
0d39376a | 771 | |
2e7910d6 | 772 | if (!fs_devs->device_dir_kobj) |
29e5be24 JM |
773 | return -ENOMEM; |
774 | ||
00c921c2 AJ |
775 | return 0; |
776 | } | |
777 | ||
e3bd6973 | 778 | int btrfs_sysfs_add_device_link(struct btrfs_fs_devices *fs_devices, |
1ba43816 | 779 | struct btrfs_device *one_device) |
00c921c2 AJ |
780 | { |
781 | int error = 0; | |
00c921c2 AJ |
782 | struct btrfs_device *dev; |
783 | ||
29e5be24 | 784 | list_for_each_entry(dev, &fs_devices->devices, dev_list) { |
f085381e AJ |
785 | struct hd_struct *disk; |
786 | struct kobject *disk_kobj; | |
787 | ||
788 | if (!dev->bdev) | |
789 | continue; | |
790 | ||
0d39376a AJ |
791 | if (one_device && one_device != dev) |
792 | continue; | |
793 | ||
f085381e AJ |
794 | disk = dev->bdev->bd_part; |
795 | disk_kobj = &part_to_dev(disk)->kobj; | |
29e5be24 | 796 | |
2e7910d6 | 797 | error = sysfs_create_link(fs_devices->device_dir_kobj, |
29e5be24 JM |
798 | disk_kobj, disk_kobj->name); |
799 | if (error) | |
800 | break; | |
801 | } | |
802 | ||
803 | return error; | |
804 | } | |
805 | ||
510d7360 JM |
806 | /* /sys/fs/btrfs/ entry */ |
807 | static struct kset *btrfs_kset; | |
808 | ||
1bae3098 DS |
809 | /* /sys/kernel/debug/btrfs */ |
810 | static struct dentry *btrfs_debugfs_root_dentry; | |
811 | ||
812 | /* Debugging tunables and exported data */ | |
813 | u64 btrfs_debugfs_test; | |
814 | ||
72059215 AJ |
815 | /* |
816 | * Can be called by the device discovery thread. | |
817 | * And parent can be specified for seed device | |
818 | */ | |
0c10e2d4 | 819 | int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs, |
72059215 | 820 | struct kobject *parent) |
5ac1d209 JM |
821 | { |
822 | int error; | |
823 | ||
2e7910d6 | 824 | init_completion(&fs_devs->kobj_unregister); |
c1b7e474 AJ |
825 | fs_devs->fsid_kobj.kset = btrfs_kset; |
826 | error = kobject_init_and_add(&fs_devs->fsid_kobj, | |
24bd69cb | 827 | &btrfs_ktype, parent, "%pU", fs_devs->fsid); |
72059215 AJ |
828 | return error; |
829 | } | |
830 | ||
96f3136e | 831 | int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info) |
72059215 AJ |
832 | { |
833 | int error; | |
2e7910d6 | 834 | struct btrfs_fs_devices *fs_devs = fs_info->fs_devices; |
c1b7e474 | 835 | struct kobject *fsid_kobj = &fs_devs->fsid_kobj; |
72059215 | 836 | |
5a13f430 AJ |
837 | btrfs_set_fs_info_ptr(fs_info); |
838 | ||
e3bd6973 | 839 | error = btrfs_sysfs_add_device_link(fs_devs, NULL); |
b7c35e81 | 840 | if (error) |
aaf13305 | 841 | return error; |
aaf13305 | 842 | |
c1b7e474 | 843 | error = sysfs_create_files(fsid_kobj, btrfs_attrs); |
e453d989 | 844 | if (error) { |
32576040 | 845 | btrfs_sysfs_rm_device_link(fs_devs, NULL); |
e453d989 JM |
846 | return error; |
847 | } | |
79da4fa4 | 848 | |
c1b7e474 | 849 | error = sysfs_create_group(fsid_kobj, |
0dd2906f AJ |
850 | &btrfs_feature_attr_group); |
851 | if (error) | |
852 | goto failure; | |
853 | ||
e453d989 | 854 | error = addrm_unknown_feature_attrs(fs_info, true); |
79da4fa4 JM |
855 | if (error) |
856 | goto failure; | |
857 | ||
6ab0a202 | 858 | fs_info->space_info_kobj = kobject_create_and_add("allocation", |
c1b7e474 | 859 | fsid_kobj); |
6ab0a202 JM |
860 | if (!fs_info->space_info_kobj) { |
861 | error = -ENOMEM; | |
862 | goto failure; | |
863 | } | |
864 | ||
865 | error = sysfs_create_files(fs_info->space_info_kobj, allocation_attrs); | |
866 | if (error) | |
867 | goto failure; | |
868 | ||
79da4fa4 JM |
869 | return 0; |
870 | failure: | |
6618a59b | 871 | btrfs_sysfs_remove_mounted(fs_info); |
5ac1d209 JM |
872 | return error; |
873 | } | |
874 | ||
444e7516 DS |
875 | |
876 | /* | |
877 | * Change per-fs features in /sys/fs/btrfs/UUID/features to match current | |
878 | * values in superblock. Call after any changes to incompat/compat_ro flags | |
879 | */ | |
880 | void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info, | |
881 | u64 bit, enum btrfs_feature_set set) | |
882 | { | |
883 | struct btrfs_fs_devices *fs_devs; | |
884 | struct kobject *fsid_kobj; | |
885 | u64 features; | |
886 | int ret; | |
887 | ||
888 | if (!fs_info) | |
889 | return; | |
890 | ||
891 | features = get_features(fs_info, set); | |
892 | ASSERT(bit & supported_feature_masks[set]); | |
893 | ||
894 | fs_devs = fs_info->fs_devices; | |
895 | fsid_kobj = &fs_devs->fsid_kobj; | |
896 | ||
bf609206 DS |
897 | if (!fsid_kobj->state_initialized) |
898 | return; | |
899 | ||
444e7516 DS |
900 | /* |
901 | * FIXME: this is too heavy to update just one value, ideally we'd like | |
902 | * to use sysfs_update_group but some refactoring is needed first. | |
903 | */ | |
904 | sysfs_remove_group(fsid_kobj, &btrfs_feature_attr_group); | |
905 | ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group); | |
906 | } | |
907 | ||
1bae3098 DS |
908 | static int btrfs_init_debugfs(void) |
909 | { | |
910 | #ifdef CONFIG_DEBUG_FS | |
911 | btrfs_debugfs_root_dentry = debugfs_create_dir("btrfs", NULL); | |
912 | if (!btrfs_debugfs_root_dentry) | |
913 | return -ENOMEM; | |
914 | ||
b0de6c4c DS |
915 | /* |
916 | * Example code, how to export data through debugfs. | |
917 | * | |
918 | * file: /sys/kernel/debug/btrfs/test | |
919 | * contents of: btrfs_debugfs_test | |
920 | */ | |
921 | #ifdef CONFIG_BTRFS_DEBUG | |
07f6a480 | 922 | debugfs_create_u64("test", S_IRUGO | S_IWUSR, btrfs_debugfs_root_dentry, |
1bae3098 | 923 | &btrfs_debugfs_test); |
b0de6c4c DS |
924 | #endif |
925 | ||
1bae3098 DS |
926 | #endif |
927 | return 0; | |
928 | } | |
929 | ||
f5c29bd9 | 930 | int __init btrfs_init_sysfs(void) |
58176a96 | 931 | { |
079b72bc | 932 | int ret; |
1bae3098 | 933 | |
e3fe4e71 GK |
934 | btrfs_kset = kset_create_and_add("btrfs", NULL, fs_kobj); |
935 | if (!btrfs_kset) | |
936 | return -ENOMEM; | |
079b72bc | 937 | |
1bae3098 DS |
938 | ret = btrfs_init_debugfs(); |
939 | if (ret) | |
001a648d | 940 | goto out1; |
79da4fa4 | 941 | |
1bae3098 | 942 | init_feature_attrs(); |
079b72bc | 943 | ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); |
001a648d FM |
944 | if (ret) |
945 | goto out2; | |
f902bd3a MT |
946 | ret = sysfs_merge_group(&btrfs_kset->kobj, |
947 | &btrfs_static_feature_attr_group); | |
948 | if (ret) | |
949 | goto out_remove_group; | |
001a648d FM |
950 | |
951 | return 0; | |
f902bd3a MT |
952 | |
953 | out_remove_group: | |
954 | sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); | |
001a648d FM |
955 | out2: |
956 | debugfs_remove_recursive(btrfs_debugfs_root_dentry); | |
957 | out1: | |
958 | kset_unregister(btrfs_kset); | |
079b72bc | 959 | |
1bae3098 | 960 | return ret; |
58176a96 JB |
961 | } |
962 | ||
e67c718b | 963 | void __cold btrfs_exit_sysfs(void) |
58176a96 | 964 | { |
f902bd3a MT |
965 | sysfs_unmerge_group(&btrfs_kset->kobj, |
966 | &btrfs_static_feature_attr_group); | |
079b72bc | 967 | sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group); |
e3fe4e71 | 968 | kset_unregister(btrfs_kset); |
1bae3098 | 969 | debugfs_remove_recursive(btrfs_debugfs_root_dentry); |
58176a96 | 970 | } |
55d47414 | 971 |