Commit | Line | Data |
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6cbd5570 CM |
1 | /* |
2 | * Copyright (C) 2007 Oracle. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or | |
5 | * modify it under the terms of the GNU General Public | |
6 | * License v2 as published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it will be useful, | |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
11 | * General Public License for more details. | |
12 | * | |
13 | * You should have received a copy of the GNU General Public | |
14 | * License along with this program; if not, write to the | |
15 | * Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
16 | * Boston, MA 021110-1307, USA. | |
17 | */ | |
18 | ||
4b82d6e4 | 19 | #include <linux/blkdev.h> |
2e635a27 | 20 | #include <linux/module.h> |
e20d96d6 | 21 | #include <linux/buffer_head.h> |
2e635a27 CM |
22 | #include <linux/fs.h> |
23 | #include <linux/pagemap.h> | |
24 | #include <linux/highmem.h> | |
25 | #include <linux/time.h> | |
26 | #include <linux/init.h> | |
27 | #include <linux/string.h> | |
28 | #include <linux/smp_lock.h> | |
29 | #include <linux/backing-dev.h> | |
4b82d6e4 | 30 | #include <linux/mount.h> |
dee26a9f | 31 | #include <linux/mpage.h> |
75dfe396 CM |
32 | #include <linux/swap.h> |
33 | #include <linux/writeback.h> | |
8fd17795 | 34 | #include <linux/statfs.h> |
08607c1b | 35 | #include <linux/compat.h> |
95e05289 | 36 | #include <linux/parser.h> |
c59f8951 | 37 | #include <linux/ctype.h> |
6da6abae | 38 | #include <linux/namei.h> |
a9218f6b | 39 | #include <linux/miscdevice.h> |
2e635a27 | 40 | #include "ctree.h" |
e20d96d6 | 41 | #include "disk-io.h" |
d5719762 | 42 | #include "transaction.h" |
2c90e5d6 | 43 | #include "btrfs_inode.h" |
c5739bba | 44 | #include "ioctl.h" |
3a686375 | 45 | #include "print-tree.h" |
5103e947 | 46 | #include "xattr.h" |
2e635a27 | 47 | |
5f39d397 | 48 | #define BTRFS_SUPER_MAGIC 0x9123683E |
f254e52c | 49 | |
39279cc3 | 50 | static struct super_operations btrfs_super_ops; |
75dfe396 | 51 | |
39279cc3 | 52 | static void btrfs_put_super (struct super_block * sb) |
b18c6685 | 53 | { |
39279cc3 | 54 | struct btrfs_root *root = btrfs_sb(sb); |
58176a96 | 55 | struct btrfs_fs_info *fs = root->fs_info; |
b18c6685 | 56 | int ret; |
b18c6685 | 57 | |
39279cc3 CM |
58 | ret = close_ctree(root); |
59 | if (ret) { | |
60 | printk("close ctree returns %d\n", ret); | |
75dfe396 | 61 | } |
58176a96 | 62 | btrfs_sysfs_del_super(fs); |
39279cc3 | 63 | sb->s_fs_info = NULL; |
75dfe396 CM |
64 | } |
65 | ||
95e05289 | 66 | enum { |
8f662a76 | 67 | Opt_subvol, Opt_nodatasum, Opt_nodatacow, Opt_max_extent, |
6f568d35 | 68 | Opt_max_inline, Opt_alloc_start, Opt_nobarrier, Opt_ssd, Opt_err, |
95e05289 CM |
69 | }; |
70 | ||
71 | static match_table_t tokens = { | |
72 | {Opt_subvol, "subvol=%s"}, | |
b6cda9bc | 73 | {Opt_nodatasum, "nodatasum"}, |
be20aa9d | 74 | {Opt_nodatacow, "nodatacow"}, |
21ad10cf | 75 | {Opt_nobarrier, "nobarrier"}, |
c59f8951 | 76 | {Opt_max_extent, "max_extent=%s"}, |
6f568d35 | 77 | {Opt_max_inline, "max_inline=%s"}, |
8f662a76 | 78 | {Opt_alloc_start, "alloc_start=%s"}, |
e18e4809 | 79 | {Opt_ssd, "ssd"}, |
95e05289 CM |
80 | {Opt_err, NULL} |
81 | }; | |
82 | ||
edbd8d4e | 83 | u64 btrfs_parse_size(char *str) |
c59f8951 | 84 | { |
edbd8d4e | 85 | u64 res; |
c59f8951 CM |
86 | int mult = 1; |
87 | char *end; | |
88 | char last; | |
89 | ||
90 | res = simple_strtoul(str, &end, 10); | |
91 | ||
92 | last = end[0]; | |
93 | if (isalpha(last)) { | |
94 | last = tolower(last); | |
95 | switch (last) { | |
96 | case 'g': | |
97 | mult *= 1024; | |
98 | case 'm': | |
99 | mult *= 1024; | |
100 | case 'k': | |
101 | mult *= 1024; | |
102 | } | |
103 | res = res * mult; | |
104 | } | |
105 | return res; | |
106 | } | |
107 | ||
95e05289 CM |
108 | static int parse_options (char * options, |
109 | struct btrfs_root *root, | |
110 | char **subvol_name) | |
111 | { | |
112 | char * p; | |
b6cda9bc | 113 | struct btrfs_fs_info *info = NULL; |
95e05289 | 114 | substring_t args[MAX_OPT_ARGS]; |
b6cda9bc | 115 | |
95e05289 CM |
116 | if (!options) |
117 | return 1; | |
118 | ||
be20aa9d CM |
119 | /* |
120 | * strsep changes the string, duplicate it because parse_options | |
121 | * gets called twice | |
122 | */ | |
123 | options = kstrdup(options, GFP_NOFS); | |
124 | if (!options) | |
125 | return -ENOMEM; | |
126 | ||
127 | if (root) | |
128 | info = root->fs_info; | |
129 | ||
95e05289 CM |
130 | while ((p = strsep (&options, ",")) != NULL) { |
131 | int token; | |
132 | if (!*p) | |
133 | continue; | |
134 | ||
135 | token = match_token(p, tokens, args); | |
136 | switch (token) { | |
137 | case Opt_subvol: | |
be20aa9d | 138 | if (subvol_name) { |
b6cda9bc | 139 | *subvol_name = match_strdup(&args[0]); |
be20aa9d | 140 | } |
b6cda9bc CM |
141 | break; |
142 | case Opt_nodatasum: | |
be20aa9d CM |
143 | if (info) { |
144 | printk("btrfs: setting nodatacsum\n"); | |
b6cda9bc | 145 | btrfs_set_opt(info->mount_opt, NODATASUM); |
be20aa9d CM |
146 | } |
147 | break; | |
148 | case Opt_nodatacow: | |
149 | if (info) { | |
150 | printk("btrfs: setting nodatacow\n"); | |
151 | btrfs_set_opt(info->mount_opt, NODATACOW); | |
152 | btrfs_set_opt(info->mount_opt, NODATASUM); | |
153 | } | |
95e05289 | 154 | break; |
e18e4809 CM |
155 | case Opt_ssd: |
156 | if (info) { | |
157 | printk("btrfs: use ssd allocation scheme\n"); | |
158 | btrfs_set_opt(info->mount_opt, SSD); | |
159 | } | |
160 | break; | |
21ad10cf CM |
161 | case Opt_nobarrier: |
162 | if (info) { | |
163 | printk("btrfs: turning off barriers\n"); | |
164 | btrfs_set_opt(info->mount_opt, NOBARRIER); | |
165 | } | |
166 | break; | |
c59f8951 CM |
167 | case Opt_max_extent: |
168 | if (info) { | |
169 | char *num = match_strdup(&args[0]); | |
170 | if (num) { | |
edbd8d4e CM |
171 | info->max_extent = |
172 | btrfs_parse_size(num); | |
c59f8951 CM |
173 | kfree(num); |
174 | ||
175 | info->max_extent = max_t(u64, | |
176 | info->max_extent, | |
177 | root->sectorsize); | |
178 | printk("btrfs: max_extent at %Lu\n", | |
179 | info->max_extent); | |
180 | } | |
181 | } | |
182 | break; | |
6f568d35 CM |
183 | case Opt_max_inline: |
184 | if (info) { | |
185 | char *num = match_strdup(&args[0]); | |
186 | if (num) { | |
187 | info->max_inline = | |
188 | btrfs_parse_size(num); | |
189 | kfree(num); | |
190 | ||
191 | info->max_inline = max_t(u64, | |
192 | info->max_inline, | |
193 | root->sectorsize); | |
194 | printk("btrfs: max_inline at %Lu\n", | |
195 | info->max_inline); | |
196 | } | |
197 | } | |
198 | break; | |
8f662a76 CM |
199 | case Opt_alloc_start: |
200 | if (info) { | |
201 | char *num = match_strdup(&args[0]); | |
202 | if (num) { | |
203 | info->alloc_start = | |
204 | btrfs_parse_size(num); | |
205 | kfree(num); | |
206 | printk("btrfs: allocations start at " | |
207 | "%Lu\n", info->alloc_start); | |
208 | } | |
209 | } | |
210 | break; | |
95e05289 | 211 | default: |
be20aa9d | 212 | break; |
95e05289 CM |
213 | } |
214 | } | |
be20aa9d | 215 | kfree(options); |
95e05289 CM |
216 | return 1; |
217 | } | |
218 | ||
39279cc3 | 219 | static int btrfs_fill_super(struct super_block * sb, void * data, int silent) |
75dfe396 | 220 | { |
39279cc3 CM |
221 | struct inode * inode; |
222 | struct dentry * root_dentry; | |
223 | struct btrfs_super_block *disk_super; | |
224 | struct btrfs_root *tree_root; | |
225 | struct btrfs_inode *bi; | |
226 | int err; | |
a429e513 | 227 | |
39279cc3 CM |
228 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
229 | sb->s_magic = BTRFS_SUPER_MAGIC; | |
230 | sb->s_op = &btrfs_super_ops; | |
5103e947 | 231 | sb->s_xattr = btrfs_xattr_handlers; |
39279cc3 | 232 | sb->s_time_gran = 1; |
a429e513 | 233 | |
39279cc3 | 234 | tree_root = open_ctree(sb); |
6567e837 | 235 | |
39279cc3 CM |
236 | if (!tree_root || IS_ERR(tree_root)) { |
237 | printk("btrfs: open_ctree failed\n"); | |
238 | return -EIO; | |
a429e513 | 239 | } |
39279cc3 | 240 | sb->s_fs_info = tree_root; |
5f39d397 | 241 | disk_super = &tree_root->fs_info->super_copy; |
39279cc3 CM |
242 | inode = btrfs_iget_locked(sb, btrfs_super_root_dir(disk_super), |
243 | tree_root); | |
244 | bi = BTRFS_I(inode); | |
245 | bi->location.objectid = inode->i_ino; | |
246 | bi->location.offset = 0; | |
39279cc3 | 247 | bi->root = tree_root; |
b888db2b | 248 | |
39279cc3 | 249 | btrfs_set_key_type(&bi->location, BTRFS_INODE_ITEM_KEY); |
a429e513 | 250 | |
39279cc3 | 251 | if (!inode) { |
6567e837 | 252 | err = -ENOMEM; |
39279cc3 | 253 | goto fail_close; |
f254e52c | 254 | } |
39279cc3 CM |
255 | if (inode->i_state & I_NEW) { |
256 | btrfs_read_locked_inode(inode); | |
257 | unlock_new_inode(inode); | |
f254e52c | 258 | } |
f254e52c | 259 | |
39279cc3 CM |
260 | root_dentry = d_alloc_root(inode); |
261 | if (!root_dentry) { | |
262 | iput(inode); | |
263 | err = -ENOMEM; | |
264 | goto fail_close; | |
f254e52c | 265 | } |
58176a96 | 266 | |
b6cda9bc CM |
267 | parse_options((char *)data, tree_root, NULL); |
268 | ||
58176a96 JB |
269 | /* this does the super kobj at the same time */ |
270 | err = btrfs_sysfs_add_super(tree_root->fs_info); | |
271 | if (err) | |
272 | goto fail_close; | |
273 | ||
39279cc3 CM |
274 | sb->s_root = root_dentry; |
275 | btrfs_transaction_queue_work(tree_root, HZ * 30); | |
6885f308 CM |
276 | |
277 | #if LINUX_VERSION_CODE >= KERNEL_VERSION(2,6,25) | |
278 | save_mount_options(sb, data); | |
279 | #endif | |
280 | ||
2619ba1f | 281 | return 0; |
39279cc3 CM |
282 | |
283 | fail_close: | |
284 | close_ctree(tree_root); | |
285 | return err; | |
2619ba1f CM |
286 | } |
287 | ||
39279cc3 | 288 | static int btrfs_sync_fs(struct super_block *sb, int wait) |
c5739bba CM |
289 | { |
290 | struct btrfs_trans_handle *trans; | |
39279cc3 | 291 | struct btrfs_root *root; |
c5739bba | 292 | int ret; |
39279cc3 | 293 | root = btrfs_sb(sb); |
2619ba1f | 294 | |
39279cc3 CM |
295 | sb->s_dirt = 0; |
296 | if (!wait) { | |
297 | filemap_flush(root->fs_info->btree_inode->i_mapping); | |
298 | return 0; | |
299 | } | |
e9d0b13b | 300 | btrfs_clean_old_snapshots(root); |
c5739bba | 301 | mutex_lock(&root->fs_info->fs_mutex); |
e9d0b13b | 302 | btrfs_defrag_dirty_roots(root->fs_info); |
c5739bba | 303 | trans = btrfs_start_transaction(root, 1); |
c5739bba | 304 | ret = btrfs_commit_transaction(trans, root); |
39279cc3 | 305 | sb->s_dirt = 0; |
c5739bba | 306 | mutex_unlock(&root->fs_info->fs_mutex); |
54aa1f4d | 307 | return ret; |
2c90e5d6 CM |
308 | } |
309 | ||
39279cc3 | 310 | static void btrfs_write_super(struct super_block *sb) |
2c90e5d6 | 311 | { |
39279cc3 | 312 | sb->s_dirt = 0; |
2c90e5d6 CM |
313 | } |
314 | ||
4b82d6e4 Y |
315 | /* |
316 | * This is almost a copy of get_sb_bdev in fs/super.c. | |
317 | * We need the local copy to allow direct mounting of | |
318 | * subvolumes, but this could be easily integrated back | |
319 | * into the generic version. --hch | |
320 | */ | |
321 | ||
322 | /* start copy & paste */ | |
323 | static int set_bdev_super(struct super_block *s, void *data) | |
324 | { | |
325 | s->s_bdev = data; | |
326 | s->s_dev = s->s_bdev->bd_dev; | |
327 | return 0; | |
328 | } | |
329 | ||
330 | static int test_bdev_super(struct super_block *s, void *data) | |
331 | { | |
332 | return (void *)s->s_bdev == data; | |
333 | } | |
334 | ||
335 | int btrfs_get_sb_bdev(struct file_system_type *fs_type, | |
336 | int flags, const char *dev_name, void *data, | |
337 | int (*fill_super)(struct super_block *, void *, int), | |
338 | struct vfsmount *mnt, const char *subvol) | |
339 | { | |
340 | struct block_device *bdev = NULL; | |
341 | struct super_block *s; | |
342 | struct dentry *root; | |
343 | int error = 0; | |
344 | ||
345 | bdev = open_bdev_excl(dev_name, flags, fs_type); | |
346 | if (IS_ERR(bdev)) | |
347 | return PTR_ERR(bdev); | |
348 | ||
349 | /* | |
350 | * once the super is inserted into the list by sget, s_umount | |
351 | * will protect the lockfs code from trying to start a snapshot | |
352 | * while we are mounting | |
353 | */ | |
354 | down(&bdev->bd_mount_sem); | |
355 | s = sget(fs_type, test_bdev_super, set_bdev_super, bdev); | |
356 | up(&bdev->bd_mount_sem); | |
357 | if (IS_ERR(s)) | |
358 | goto error_s; | |
359 | ||
360 | if (s->s_root) { | |
361 | if ((flags ^ s->s_flags) & MS_RDONLY) { | |
362 | up_write(&s->s_umount); | |
363 | deactivate_super(s); | |
364 | error = -EBUSY; | |
365 | goto error_bdev; | |
366 | } | |
367 | ||
368 | close_bdev_excl(bdev); | |
369 | } else { | |
370 | char b[BDEVNAME_SIZE]; | |
371 | ||
372 | s->s_flags = flags; | |
373 | strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); | |
374 | sb_set_blocksize(s, block_size(bdev)); | |
375 | error = fill_super(s, data, flags & MS_SILENT ? 1 : 0); | |
376 | if (error) { | |
377 | up_write(&s->s_umount); | |
378 | deactivate_super(s); | |
379 | goto error; | |
380 | } | |
381 | ||
382 | s->s_flags |= MS_ACTIVE; | |
383 | } | |
384 | ||
385 | if (subvol) { | |
386 | root = lookup_one_len(subvol, s->s_root, strlen(subvol)); | |
387 | if (IS_ERR(root)) { | |
388 | up_write(&s->s_umount); | |
389 | deactivate_super(s); | |
390 | error = PTR_ERR(root); | |
391 | goto error; | |
392 | } | |
393 | if (!root->d_inode) { | |
394 | dput(root); | |
395 | up_write(&s->s_umount); | |
396 | deactivate_super(s); | |
397 | error = -ENXIO; | |
398 | goto error; | |
399 | } | |
400 | } else { | |
401 | root = dget(s->s_root); | |
402 | } | |
403 | ||
404 | mnt->mnt_sb = s; | |
405 | mnt->mnt_root = root; | |
406 | return 0; | |
407 | ||
408 | error_s: | |
409 | error = PTR_ERR(s); | |
410 | error_bdev: | |
411 | close_bdev_excl(bdev); | |
412 | error: | |
413 | return error; | |
414 | } | |
415 | /* end copy & paste */ | |
416 | ||
2e635a27 | 417 | static int btrfs_get_sb(struct file_system_type *fs_type, |
95e05289 | 418 | int flags, const char *dev_name, void *data, struct vfsmount *mnt) |
2e635a27 | 419 | { |
4b82d6e4 | 420 | int ret; |
95e05289 | 421 | char *subvol_name = NULL; |
4b82d6e4 | 422 | |
95e05289 | 423 | parse_options((char *)data, NULL, &subvol_name); |
4b82d6e4 Y |
424 | ret = btrfs_get_sb_bdev(fs_type, flags, dev_name, data, |
425 | btrfs_fill_super, mnt, | |
426 | subvol_name ? subvol_name : "default"); | |
c59f8951 CM |
427 | if (subvol_name) |
428 | kfree(subvol_name); | |
4b82d6e4 | 429 | return ret; |
2e635a27 CM |
430 | } |
431 | ||
8fd17795 CM |
432 | static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
433 | { | |
434 | struct btrfs_root *root = btrfs_sb(dentry->d_sb); | |
4b52dff6 | 435 | struct btrfs_super_block *disk_super = &root->fs_info->super_copy; |
db94535d | 436 | int bits = dentry->d_sb->s_blocksize_bits; |
8fd17795 CM |
437 | |
438 | buf->f_namelen = BTRFS_NAME_LEN; | |
db94535d CM |
439 | buf->f_blocks = btrfs_super_total_bytes(disk_super) >> bits; |
440 | buf->f_bfree = buf->f_blocks - | |
441 | (btrfs_super_bytes_used(disk_super) >> bits); | |
8fd17795 CM |
442 | buf->f_bavail = buf->f_bfree; |
443 | buf->f_bsize = dentry->d_sb->s_blocksize; | |
444 | buf->f_type = BTRFS_SUPER_MAGIC; | |
445 | return 0; | |
446 | } | |
b5133862 | 447 | |
a9218f6b CM |
448 | static long btrfs_control_ioctl(struct file *file, unsigned int cmd, |
449 | unsigned long arg) | |
450 | { | |
451 | printk("btrfs control ioctl %d\n", cmd); | |
452 | return 0; | |
453 | } | |
454 | ||
2e635a27 CM |
455 | static struct file_system_type btrfs_fs_type = { |
456 | .owner = THIS_MODULE, | |
457 | .name = "btrfs", | |
458 | .get_sb = btrfs_get_sb, | |
459 | .kill_sb = kill_block_super, | |
460 | .fs_flags = FS_REQUIRES_DEV, | |
461 | }; | |
a9218f6b | 462 | |
ed0dab6b Y |
463 | static void btrfs_write_super_lockfs(struct super_block *sb) |
464 | { | |
465 | struct btrfs_root *root = btrfs_sb(sb); | |
466 | btrfs_transaction_flush_work(root); | |
467 | } | |
468 | ||
469 | static void btrfs_unlockfs(struct super_block *sb) | |
470 | { | |
471 | struct btrfs_root *root = btrfs_sb(sb); | |
472 | btrfs_transaction_queue_work(root, HZ * 30); | |
473 | } | |
2e635a27 | 474 | |
e20d96d6 | 475 | static struct super_operations btrfs_super_ops = { |
134e9731 | 476 | .delete_inode = btrfs_delete_inode, |
2da98f00 | 477 | .put_inode = btrfs_put_inode, |
e20d96d6 | 478 | .put_super = btrfs_put_super, |
d5719762 CM |
479 | .write_super = btrfs_write_super, |
480 | .sync_fs = btrfs_sync_fs, | |
6885f308 CM |
481 | #if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,25) |
482 | .read_inode = btrfs_read_locked_inode, | |
483 | #else | |
484 | .show_options = generic_show_options, | |
485 | #endif | |
4730a4bc | 486 | .write_inode = btrfs_write_inode, |
b5133862 | 487 | .dirty_inode = btrfs_dirty_inode, |
2c90e5d6 CM |
488 | .alloc_inode = btrfs_alloc_inode, |
489 | .destroy_inode = btrfs_destroy_inode, | |
8fd17795 | 490 | .statfs = btrfs_statfs, |
ed0dab6b Y |
491 | .write_super_lockfs = btrfs_write_super_lockfs, |
492 | .unlockfs = btrfs_unlockfs, | |
e20d96d6 | 493 | }; |
a9218f6b CM |
494 | |
495 | static const struct file_operations btrfs_ctl_fops = { | |
496 | .unlocked_ioctl = btrfs_control_ioctl, | |
497 | .compat_ioctl = btrfs_control_ioctl, | |
498 | .owner = THIS_MODULE, | |
499 | }; | |
500 | ||
501 | static struct miscdevice btrfs_misc = { | |
502 | .minor = MISC_DYNAMIC_MINOR, | |
503 | .name = "btrfs-control", | |
504 | .fops = &btrfs_ctl_fops | |
505 | }; | |
506 | ||
507 | static int btrfs_interface_init(void) | |
508 | { | |
509 | return misc_register(&btrfs_misc); | |
510 | } | |
511 | ||
512 | void btrfs_interface_exit(void) | |
513 | { | |
514 | if (misc_deregister(&btrfs_misc) < 0) | |
515 | printk("misc_deregister failed for control device"); | |
516 | } | |
517 | ||
2e635a27 CM |
518 | static int __init init_btrfs_fs(void) |
519 | { | |
2c90e5d6 | 520 | int err; |
58176a96 JB |
521 | |
522 | err = btrfs_init_sysfs(); | |
523 | if (err) | |
524 | return err; | |
525 | ||
08607c1b | 526 | btrfs_init_transaction_sys(); |
39279cc3 | 527 | err = btrfs_init_cachep(); |
2c90e5d6 | 528 | if (err) |
2f4cbe64 | 529 | goto free_transaction_sys; |
d1310b2e CM |
530 | |
531 | err = extent_io_init(); | |
2f4cbe64 WB |
532 | if (err) |
533 | goto free_cachep; | |
534 | ||
d1310b2e CM |
535 | err = extent_map_init(); |
536 | if (err) | |
537 | goto free_extent_io; | |
538 | ||
a9218f6b | 539 | err = btrfs_interface_init(); |
2f4cbe64 WB |
540 | if (err) |
541 | goto free_extent_map; | |
a9218f6b CM |
542 | err = register_filesystem(&btrfs_fs_type); |
543 | if (err) | |
544 | goto unregister_ioctl; | |
2f4cbe64 WB |
545 | return 0; |
546 | ||
a9218f6b CM |
547 | unregister_ioctl: |
548 | btrfs_interface_exit(); | |
2f4cbe64 WB |
549 | free_extent_map: |
550 | extent_map_exit(); | |
d1310b2e CM |
551 | free_extent_io: |
552 | extent_io_exit(); | |
2f4cbe64 WB |
553 | free_cachep: |
554 | btrfs_destroy_cachep(); | |
555 | free_transaction_sys: | |
556 | btrfs_exit_transaction_sys(); | |
557 | btrfs_exit_sysfs(); | |
558 | return err; | |
2e635a27 CM |
559 | } |
560 | ||
561 | static void __exit exit_btrfs_fs(void) | |
562 | { | |
08607c1b | 563 | btrfs_exit_transaction_sys(); |
39279cc3 | 564 | btrfs_destroy_cachep(); |
a52d9a80 | 565 | extent_map_exit(); |
d1310b2e | 566 | extent_io_exit(); |
a9218f6b | 567 | btrfs_interface_exit(); |
2e635a27 | 568 | unregister_filesystem(&btrfs_fs_type); |
58176a96 | 569 | btrfs_exit_sysfs(); |
2e635a27 CM |
570 | } |
571 | ||
572 | module_init(init_btrfs_fs) | |
573 | module_exit(exit_btrfs_fs) | |
574 | ||
575 | MODULE_LICENSE("GPL"); |