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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 | ||
4b82d6e4 | 6 | #include <linux/blkdev.h> |
2e635a27 CM |
7 | #include <linux/module.h> |
8 | #include <linux/fs.h> | |
9 | #include <linux/pagemap.h> | |
10 | #include <linux/highmem.h> | |
11 | #include <linux/time.h> | |
12 | #include <linux/init.h> | |
a9572a15 | 13 | #include <linux/seq_file.h> |
2e635a27 | 14 | #include <linux/string.h> |
2e635a27 | 15 | #include <linux/backing-dev.h> |
4b82d6e4 | 16 | #include <linux/mount.h> |
75dfe396 | 17 | #include <linux/writeback.h> |
8fd17795 | 18 | #include <linux/statfs.h> |
08607c1b | 19 | #include <linux/compat.h> |
95e05289 | 20 | #include <linux/parser.h> |
c59f8951 | 21 | #include <linux/ctype.h> |
6da6abae | 22 | #include <linux/namei.h> |
a9218f6b | 23 | #include <linux/miscdevice.h> |
1bcbf313 | 24 | #include <linux/magic.h> |
5a0e3ad6 | 25 | #include <linux/slab.h> |
22c44fe6 | 26 | #include <linux/ratelimit.h> |
9678c543 | 27 | #include <linux/crc32c.h> |
55e301fd | 28 | #include <linux/btrfs.h> |
16cdcec7 | 29 | #include "delayed-inode.h" |
2e635a27 | 30 | #include "ctree.h" |
e20d96d6 | 31 | #include "disk-io.h" |
d5719762 | 32 | #include "transaction.h" |
2c90e5d6 | 33 | #include "btrfs_inode.h" |
3a686375 | 34 | #include "print-tree.h" |
63541927 | 35 | #include "props.h" |
5103e947 | 36 | #include "xattr.h" |
8a4b83cc | 37 | #include "volumes.h" |
be6e8dc0 | 38 | #include "export.h" |
c8b97818 | 39 | #include "compression.h" |
9c5085c1 | 40 | #include "rcu-string.h" |
8dabb742 | 41 | #include "dev-replace.h" |
74255aa0 | 42 | #include "free-space-cache.h" |
b9e9a6cb | 43 | #include "backref.h" |
8719aaae | 44 | #include "space-info.h" |
89439109 | 45 | #include "sysfs.h" |
b70f5097 | 46 | #include "zoned.h" |
dc11dd5d | 47 | #include "tests/btrfs-tests.h" |
aac0023c | 48 | #include "block-group.h" |
b0643e59 | 49 | #include "discard.h" |
d3982100 | 50 | #include "qgroup.h" |
b8bea09a | 51 | #include "raid56.h" |
1abe9b8a | 52 | #define CREATE_TRACE_POINTS |
53 | #include <trace/events/btrfs.h> | |
54 | ||
b87221de | 55 | static const struct super_operations btrfs_super_ops; |
72fa39f5 MT |
56 | |
57 | /* | |
58 | * Types for mounting the default subvolume and a subvolume explicitly | |
59 | * requested by subvol=/path. That way the callchain is straightforward and we | |
60 | * don't have to play tricks with the mount options and recursive calls to | |
61 | * btrfs_mount. | |
312c89fb MT |
62 | * |
63 | * The new btrfs_root_fs_type also servers as a tag for the bdev_holder. | |
72fa39f5 | 64 | */ |
830c4adb | 65 | static struct file_system_type btrfs_fs_type; |
72fa39f5 | 66 | static struct file_system_type btrfs_root_fs_type; |
75dfe396 | 67 | |
0723a047 HH |
68 | static int btrfs_remount(struct super_block *sb, int *flags, char *data); |
69 | ||
c067da87 STD |
70 | #ifdef CONFIG_PRINTK |
71 | ||
72 | #define STATE_STRING_PREFACE ": state " | |
73 | #define STATE_STRING_BUF_LEN (sizeof(STATE_STRING_PREFACE) + BTRFS_FS_STATE_COUNT) | |
74 | ||
75 | /* | |
143823cf | 76 | * Characters to print to indicate error conditions or uncommon filesystem state. |
c067da87 STD |
77 | * RO is not an error. |
78 | */ | |
79 | static const char fs_state_chars[] = { | |
80 | [BTRFS_FS_STATE_ERROR] = 'E', | |
81 | [BTRFS_FS_STATE_REMOUNTING] = 'M', | |
82 | [BTRFS_FS_STATE_RO] = 0, | |
83 | [BTRFS_FS_STATE_TRANS_ABORTED] = 'A', | |
84 | [BTRFS_FS_STATE_DEV_REPLACING] = 'R', | |
85 | [BTRFS_FS_STATE_DUMMY_FS_INFO] = 0, | |
86 | [BTRFS_FS_STATE_NO_CSUMS] = 'C', | |
87 | [BTRFS_FS_STATE_LOG_CLEANUP_ERROR] = 'L', | |
88 | }; | |
89 | ||
90 | static void btrfs_state_to_string(const struct btrfs_fs_info *info, char *buf) | |
91 | { | |
92 | unsigned int bit; | |
93 | bool states_printed = false; | |
94 | unsigned long fs_state = READ_ONCE(info->fs_state); | |
95 | char *curr = buf; | |
96 | ||
97 | memcpy(curr, STATE_STRING_PREFACE, sizeof(STATE_STRING_PREFACE)); | |
98 | curr += sizeof(STATE_STRING_PREFACE) - 1; | |
99 | ||
100 | for_each_set_bit(bit, &fs_state, sizeof(fs_state)) { | |
101 | WARN_ON_ONCE(bit >= BTRFS_FS_STATE_COUNT); | |
102 | if ((bit < BTRFS_FS_STATE_COUNT) && fs_state_chars[bit]) { | |
103 | *curr++ = fs_state_chars[bit]; | |
104 | states_printed = true; | |
105 | } | |
106 | } | |
107 | ||
108 | /* If no states were printed, reset the buffer */ | |
109 | if (!states_printed) | |
110 | curr = buf; | |
111 | ||
112 | *curr++ = 0; | |
113 | } | |
114 | #endif | |
115 | ||
59131393 JB |
116 | /* |
117 | * Generally the error codes correspond to their respective errors, but there | |
118 | * are a few special cases. | |
119 | * | |
120 | * EUCLEAN: Any sort of corruption that we encounter. The tree-checker for | |
121 | * instance will return EUCLEAN if any of the blocks are corrupted in | |
122 | * a way that is problematic. We want to reserve EUCLEAN for these | |
123 | * sort of corruptions. | |
124 | * | |
125 | * EROFS: If we check BTRFS_FS_STATE_ERROR and fail out with a return error, we | |
126 | * need to use EROFS for this case. We will have no idea of the | |
127 | * original failure, that will have been reported at the time we tripped | |
128 | * over the error. Each subsequent error that doesn't have any context | |
129 | * of the original error should use EROFS when handling BTRFS_FS_STATE_ERROR. | |
130 | */ | |
4143cb8b | 131 | const char * __attribute_const__ btrfs_decode_error(int errno) |
acce952b | 132 | { |
08748810 | 133 | char *errstr = "unknown"; |
acce952b | 134 | |
135 | switch (errno) { | |
d54f8144 DS |
136 | case -ENOENT: /* -2 */ |
137 | errstr = "No such entry"; | |
138 | break; | |
139 | case -EIO: /* -5 */ | |
acce952b | 140 | errstr = "IO failure"; |
141 | break; | |
d54f8144 | 142 | case -ENOMEM: /* -12*/ |
acce952b | 143 | errstr = "Out of memory"; |
144 | break; | |
d54f8144 | 145 | case -EEXIST: /* -17 */ |
8c342930 JM |
146 | errstr = "Object already exists"; |
147 | break; | |
d54f8144 | 148 | case -ENOSPC: /* -28 */ |
94ef7280 DS |
149 | errstr = "No space left"; |
150 | break; | |
d54f8144 DS |
151 | case -EROFS: /* -30 */ |
152 | errstr = "Readonly filesystem"; | |
94ef7280 | 153 | break; |
fb8521ca DS |
154 | case -EOPNOTSUPP: /* -95 */ |
155 | errstr = "Operation not supported"; | |
156 | break; | |
157 | case -EUCLEAN: /* -117 */ | |
158 | errstr = "Filesystem corrupted"; | |
159 | break; | |
160 | case -EDQUOT: /* -122 */ | |
161 | errstr = "Quota exceeded"; | |
162 | break; | |
acce952b | 163 | } |
164 | ||
165 | return errstr; | |
166 | } | |
167 | ||
acce952b | 168 | /* |
34d97007 | 169 | * __btrfs_handle_fs_error decodes expected errors from the caller and |
52042d8e | 170 | * invokes the appropriate error response. |
acce952b | 171 | */ |
c0d19e2b | 172 | __cold |
34d97007 | 173 | void __btrfs_handle_fs_error(struct btrfs_fs_info *fs_info, const char *function, |
4da35113 | 174 | unsigned int line, int errno, const char *fmt, ...) |
acce952b | 175 | { |
176 | struct super_block *sb = fs_info->sb; | |
57d816a1 | 177 | #ifdef CONFIG_PRINTK |
c067da87 | 178 | char statestr[STATE_STRING_BUF_LEN]; |
acce952b | 179 | const char *errstr; |
57d816a1 | 180 | #endif |
acce952b | 181 | |
182 | /* | |
183 | * Special case: if the error is EROFS, and we're already | |
1751e8a6 | 184 | * under SB_RDONLY, then it is safe here. |
acce952b | 185 | */ |
bc98a42c | 186 | if (errno == -EROFS && sb_rdonly(sb)) |
4da35113 JM |
187 | return; |
188 | ||
57d816a1 | 189 | #ifdef CONFIG_PRINTK |
08748810 | 190 | errstr = btrfs_decode_error(errno); |
c067da87 | 191 | btrfs_state_to_string(fs_info, statestr); |
4da35113 | 192 | if (fmt) { |
37252a66 ES |
193 | struct va_format vaf; |
194 | va_list args; | |
195 | ||
196 | va_start(args, fmt); | |
197 | vaf.fmt = fmt; | |
198 | vaf.va = &args; | |
4da35113 | 199 | |
c067da87 STD |
200 | pr_crit("BTRFS: error (device %s%s) in %s:%d: errno=%d %s (%pV)\n", |
201 | sb->s_id, statestr, function, line, errno, errstr, &vaf); | |
37252a66 | 202 | va_end(args); |
4da35113 | 203 | } else { |
c067da87 STD |
204 | pr_crit("BTRFS: error (device %s%s) in %s:%d: errno=%d %s\n", |
205 | sb->s_id, statestr, function, line, errno, errstr); | |
4da35113 | 206 | } |
57d816a1 | 207 | #endif |
acce952b | 208 | |
0713d90c AJ |
209 | /* |
210 | * Today we only save the error info to memory. Long term we'll | |
211 | * also send it down to the disk | |
212 | */ | |
213 | set_bit(BTRFS_FS_STATE_ERROR, &fs_info->fs_state); | |
214 | ||
4da35113 | 215 | /* Don't go through full error handling during mount */ |
922ea899 AJ |
216 | if (!(sb->s_flags & SB_BORN)) |
217 | return; | |
218 | ||
219 | if (sb_rdonly(sb)) | |
220 | return; | |
221 | ||
b0643e59 DZ |
222 | btrfs_discard_stop(fs_info); |
223 | ||
922ea899 | 224 | /* btrfs handle error by forcing the filesystem readonly */ |
a0a1db70 | 225 | btrfs_set_sb_rdonly(sb); |
922ea899 AJ |
226 | btrfs_info(fs_info, "forced readonly"); |
227 | /* | |
228 | * Note that a running device replace operation is not canceled here | |
229 | * although there is no way to update the progress. It would add the | |
230 | * risk of a deadlock, therefore the canceling is omitted. The only | |
231 | * penalty is that some I/O remains active until the procedure | |
52042d8e | 232 | * completes. The next time when the filesystem is mounted writable |
922ea899 AJ |
233 | * again, the device replace operation continues. |
234 | */ | |
4da35113 | 235 | } |
acce952b | 236 | |
57d816a1 | 237 | #ifdef CONFIG_PRINTK |
533574c6 | 238 | static const char * const logtypes[] = { |
4da35113 JM |
239 | "emergency", |
240 | "alert", | |
241 | "critical", | |
242 | "error", | |
243 | "warning", | |
244 | "notice", | |
245 | "info", | |
246 | "debug", | |
247 | }; | |
248 | ||
35f4e5e6 NB |
249 | |
250 | /* | |
251 | * Use one ratelimit state per log level so that a flood of less important | |
252 | * messages doesn't cause more important ones to be dropped. | |
253 | */ | |
254 | static struct ratelimit_state printk_limits[] = { | |
255 | RATELIMIT_STATE_INIT(printk_limits[0], DEFAULT_RATELIMIT_INTERVAL, 100), | |
256 | RATELIMIT_STATE_INIT(printk_limits[1], DEFAULT_RATELIMIT_INTERVAL, 100), | |
257 | RATELIMIT_STATE_INIT(printk_limits[2], DEFAULT_RATELIMIT_INTERVAL, 100), | |
258 | RATELIMIT_STATE_INIT(printk_limits[3], DEFAULT_RATELIMIT_INTERVAL, 100), | |
259 | RATELIMIT_STATE_INIT(printk_limits[4], DEFAULT_RATELIMIT_INTERVAL, 100), | |
260 | RATELIMIT_STATE_INIT(printk_limits[5], DEFAULT_RATELIMIT_INTERVAL, 100), | |
261 | RATELIMIT_STATE_INIT(printk_limits[6], DEFAULT_RATELIMIT_INTERVAL, 100), | |
262 | RATELIMIT_STATE_INIT(printk_limits[7], DEFAULT_RATELIMIT_INTERVAL, 100), | |
263 | }; | |
264 | ||
b0a66a31 | 265 | void __cold _btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...) |
4da35113 | 266 | { |
40f7828b | 267 | char lvl[PRINTK_MAX_SINGLE_HEADER_LEN + 1] = "\0"; |
4da35113 JM |
268 | struct va_format vaf; |
269 | va_list args; | |
533574c6 | 270 | int kern_level; |
40f7828b PM |
271 | const char *type = logtypes[4]; |
272 | struct ratelimit_state *ratelimit = &printk_limits[4]; | |
4da35113 JM |
273 | |
274 | va_start(args, fmt); | |
275 | ||
262c5e86 | 276 | while ((kern_level = printk_get_level(fmt)) != 0) { |
533574c6 | 277 | size_t size = printk_skip_level(fmt) - fmt; |
262c5e86 PM |
278 | |
279 | if (kern_level >= '0' && kern_level <= '7') { | |
280 | memcpy(lvl, fmt, size); | |
281 | lvl[size] = '\0'; | |
282 | type = logtypes[kern_level - '0']; | |
283 | ratelimit = &printk_limits[kern_level - '0']; | |
284 | } | |
533574c6 | 285 | fmt += size; |
262c5e86 PM |
286 | } |
287 | ||
4da35113 JM |
288 | vaf.fmt = fmt; |
289 | vaf.va = &args; | |
533574c6 | 290 | |
a0f6d924 | 291 | if (__ratelimit(ratelimit)) { |
c067da87 STD |
292 | if (fs_info) { |
293 | char statestr[STATE_STRING_BUF_LEN]; | |
294 | ||
295 | btrfs_state_to_string(fs_info, statestr); | |
b0a66a31 | 296 | _printk("%sBTRFS %s (device %s%s): %pV\n", lvl, type, |
c067da87 STD |
297 | fs_info->sb->s_id, statestr, &vaf); |
298 | } else { | |
b0a66a31 | 299 | _printk("%sBTRFS %s: %pV\n", lvl, type, &vaf); |
c067da87 | 300 | } |
a0f6d924 | 301 | } |
533574c6 JP |
302 | |
303 | va_end(args); | |
304 | } | |
533574c6 | 305 | #endif |
acce952b | 306 | |
e9306ad4 QW |
307 | #if BITS_PER_LONG == 32 |
308 | void __cold btrfs_warn_32bit_limit(struct btrfs_fs_info *fs_info) | |
309 | { | |
310 | if (!test_and_set_bit(BTRFS_FS_32BIT_WARN, &fs_info->flags)) { | |
311 | btrfs_warn(fs_info, "reaching 32bit limit for logical addresses"); | |
312 | btrfs_warn(fs_info, | |
313 | "due to page cache limit on 32bit systems, btrfs can't access metadata at or beyond %lluT", | |
314 | BTRFS_32BIT_MAX_FILE_SIZE >> 40); | |
315 | btrfs_warn(fs_info, | |
316 | "please consider upgrading to 64bit kernel/hardware"); | |
317 | } | |
318 | } | |
319 | ||
320 | void __cold btrfs_err_32bit_limit(struct btrfs_fs_info *fs_info) | |
321 | { | |
322 | if (!test_and_set_bit(BTRFS_FS_32BIT_ERROR, &fs_info->flags)) { | |
323 | btrfs_err(fs_info, "reached 32bit limit for logical addresses"); | |
324 | btrfs_err(fs_info, | |
325 | "due to page cache limit on 32bit systems, metadata beyond %lluT can't be accessed", | |
326 | BTRFS_32BIT_MAX_FILE_SIZE >> 40); | |
327 | btrfs_err(fs_info, | |
328 | "please consider upgrading to 64bit kernel/hardware"); | |
329 | } | |
330 | } | |
331 | #endif | |
332 | ||
49b25e05 JM |
333 | /* |
334 | * We only mark the transaction aborted and then set the file system read-only. | |
335 | * This will prevent new transactions from starting or trying to join this | |
336 | * one. | |
337 | * | |
338 | * This means that error recovery at the call site is limited to freeing | |
339 | * any local memory allocations and passing the error code up without | |
340 | * further cleanup. The transaction should complete as it normally would | |
341 | * in the call path but will return -EIO. | |
342 | * | |
343 | * We'll complete the cleanup in btrfs_end_transaction and | |
344 | * btrfs_commit_transaction. | |
345 | */ | |
c0d19e2b | 346 | __cold |
49b25e05 | 347 | void __btrfs_abort_transaction(struct btrfs_trans_handle *trans, |
66642832 | 348 | const char *function, |
49b25e05 JM |
349 | unsigned int line, int errno) |
350 | { | |
66642832 JM |
351 | struct btrfs_fs_info *fs_info = trans->fs_info; |
352 | ||
bf31f87f | 353 | WRITE_ONCE(trans->aborted, errno); |
20c7bcec | 354 | WRITE_ONCE(trans->transaction->aborted, errno); |
501407aa | 355 | /* Wake up anybody who may be waiting on this transaction */ |
66642832 JM |
356 | wake_up(&fs_info->transaction_wait); |
357 | wake_up(&fs_info->transaction_blocked_wait); | |
358 | __btrfs_handle_fs_error(fs_info, function, line, errno, NULL); | |
49b25e05 | 359 | } |
8c342930 JM |
360 | /* |
361 | * __btrfs_panic decodes unexpected, fatal errors from the caller, | |
362 | * issues an alert, and either panics or BUGs, depending on mount options. | |
363 | */ | |
c0d19e2b | 364 | __cold |
8c342930 JM |
365 | void __btrfs_panic(struct btrfs_fs_info *fs_info, const char *function, |
366 | unsigned int line, int errno, const char *fmt, ...) | |
367 | { | |
8c342930 JM |
368 | char *s_id = "<unknown>"; |
369 | const char *errstr; | |
370 | struct va_format vaf = { .fmt = fmt }; | |
371 | va_list args; | |
acce952b | 372 | |
8c342930 JM |
373 | if (fs_info) |
374 | s_id = fs_info->sb->s_id; | |
acce952b | 375 | |
8c342930 JM |
376 | va_start(args, fmt); |
377 | vaf.va = &args; | |
378 | ||
08748810 | 379 | errstr = btrfs_decode_error(errno); |
d8953d69 | 380 | if (fs_info && (btrfs_test_opt(fs_info, PANIC_ON_FATAL_ERROR))) |
08748810 DS |
381 | panic(KERN_CRIT "BTRFS panic (device %s) in %s:%d: %pV (errno=%d %s)\n", |
382 | s_id, function, line, &vaf, errno, errstr); | |
8c342930 | 383 | |
efe120a0 FH |
384 | btrfs_crit(fs_info, "panic in %s:%d: %pV (errno=%d %s)", |
385 | function, line, &vaf, errno, errstr); | |
8c342930 JM |
386 | va_end(args); |
387 | /* Caller calls BUG() */ | |
acce952b | 388 | } |
389 | ||
d397712b | 390 | static void btrfs_put_super(struct super_block *sb) |
b18c6685 | 391 | { |
6bccf3ab | 392 | close_ctree(btrfs_sb(sb)); |
75dfe396 CM |
393 | } |
394 | ||
95e05289 | 395 | enum { |
416a7202 DS |
396 | Opt_acl, Opt_noacl, |
397 | Opt_clear_cache, | |
398 | Opt_commit_interval, | |
399 | Opt_compress, | |
400 | Opt_compress_force, | |
401 | Opt_compress_force_type, | |
402 | Opt_compress_type, | |
403 | Opt_degraded, | |
404 | Opt_device, | |
405 | Opt_fatal_errors, | |
406 | Opt_flushoncommit, Opt_noflushoncommit, | |
416a7202 DS |
407 | Opt_max_inline, |
408 | Opt_barrier, Opt_nobarrier, | |
409 | Opt_datacow, Opt_nodatacow, | |
410 | Opt_datasum, Opt_nodatasum, | |
411 | Opt_defrag, Opt_nodefrag, | |
412 | Opt_discard, Opt_nodiscard, | |
b0643e59 | 413 | Opt_discard_mode, |
416a7202 DS |
414 | Opt_norecovery, |
415 | Opt_ratio, | |
416 | Opt_rescan_uuid_tree, | |
417 | Opt_skip_balance, | |
418 | Opt_space_cache, Opt_no_space_cache, | |
419 | Opt_space_cache_version, | |
420 | Opt_ssd, Opt_nossd, | |
421 | Opt_ssd_spread, Opt_nossd_spread, | |
422 | Opt_subvol, | |
37becec9 | 423 | Opt_subvol_empty, |
416a7202 DS |
424 | Opt_subvolid, |
425 | Opt_thread_pool, | |
426 | Opt_treelog, Opt_notreelog, | |
416a7202 DS |
427 | Opt_user_subvol_rm_allowed, |
428 | ||
74ef0018 QW |
429 | /* Rescue options */ |
430 | Opt_rescue, | |
431 | Opt_usebackuproot, | |
432 | Opt_nologreplay, | |
42437a63 | 433 | Opt_ignorebadroots, |
882dbe0c | 434 | Opt_ignoredatacsums, |
9037d3cb | 435 | Opt_rescue_all, |
74ef0018 | 436 | |
416a7202 | 437 | /* Deprecated options */ |
416a7202 | 438 | Opt_recovery, |
5297199a | 439 | Opt_inode_cache, Opt_noinode_cache, |
416a7202 DS |
440 | |
441 | /* Debugging options */ | |
442 | Opt_check_integrity, | |
70f6d82e | 443 | Opt_check_integrity_including_extent_data, |
416a7202 DS |
444 | Opt_check_integrity_print_mask, |
445 | Opt_enospc_debug, Opt_noenospc_debug, | |
d0bd4560 JB |
446 | #ifdef CONFIG_BTRFS_DEBUG |
447 | Opt_fragment_data, Opt_fragment_metadata, Opt_fragment_all, | |
fb592373 JB |
448 | #endif |
449 | #ifdef CONFIG_BTRFS_FS_REF_VERIFY | |
450 | Opt_ref_verify, | |
d0bd4560 | 451 | #endif |
9555c6c1 | 452 | Opt_err, |
95e05289 CM |
453 | }; |
454 | ||
4d4ab6d6 | 455 | static const match_table_t tokens = { |
416a7202 DS |
456 | {Opt_acl, "acl"}, |
457 | {Opt_noacl, "noacl"}, | |
458 | {Opt_clear_cache, "clear_cache"}, | |
459 | {Opt_commit_interval, "commit=%u"}, | |
c8b97818 | 460 | {Opt_compress, "compress"}, |
261507a0 | 461 | {Opt_compress_type, "compress=%s"}, |
a555f810 | 462 | {Opt_compress_force, "compress-force"}, |
261507a0 | 463 | {Opt_compress_force_type, "compress-force=%s"}, |
416a7202 DS |
464 | {Opt_degraded, "degraded"}, |
465 | {Opt_device, "device=%s"}, | |
466 | {Opt_fatal_errors, "fatal_errors=%s"}, | |
dccae999 | 467 | {Opt_flushoncommit, "flushoncommit"}, |
2c9ee856 | 468 | {Opt_noflushoncommit, "noflushoncommit"}, |
416a7202 DS |
469 | {Opt_inode_cache, "inode_cache"}, |
470 | {Opt_noinode_cache, "noinode_cache"}, | |
471 | {Opt_max_inline, "max_inline=%s"}, | |
472 | {Opt_barrier, "barrier"}, | |
473 | {Opt_nobarrier, "nobarrier"}, | |
474 | {Opt_datacow, "datacow"}, | |
475 | {Opt_nodatacow, "nodatacow"}, | |
476 | {Opt_datasum, "datasum"}, | |
477 | {Opt_nodatasum, "nodatasum"}, | |
478 | {Opt_defrag, "autodefrag"}, | |
479 | {Opt_nodefrag, "noautodefrag"}, | |
e244a0ae | 480 | {Opt_discard, "discard"}, |
b0643e59 | 481 | {Opt_discard_mode, "discard=%s"}, |
e07a2ade | 482 | {Opt_nodiscard, "nodiscard"}, |
416a7202 DS |
483 | {Opt_norecovery, "norecovery"}, |
484 | {Opt_ratio, "metadata_ratio=%u"}, | |
485 | {Opt_rescan_uuid_tree, "rescan_uuid_tree"}, | |
486 | {Opt_skip_balance, "skip_balance"}, | |
0af3d00b | 487 | {Opt_space_cache, "space_cache"}, |
8965593e | 488 | {Opt_no_space_cache, "nospace_cache"}, |
416a7202 DS |
489 | {Opt_space_cache_version, "space_cache=%s"}, |
490 | {Opt_ssd, "ssd"}, | |
491 | {Opt_nossd, "nossd"}, | |
492 | {Opt_ssd_spread, "ssd_spread"}, | |
493 | {Opt_nossd_spread, "nossd_spread"}, | |
494 | {Opt_subvol, "subvol=%s"}, | |
37becec9 | 495 | {Opt_subvol_empty, "subvol="}, |
416a7202 DS |
496 | {Opt_subvolid, "subvolid=%s"}, |
497 | {Opt_thread_pool, "thread_pool=%u"}, | |
498 | {Opt_treelog, "treelog"}, | |
499 | {Opt_notreelog, "notreelog"}, | |
416a7202 DS |
500 | {Opt_user_subvol_rm_allowed, "user_subvol_rm_allowed"}, |
501 | ||
74ef0018 QW |
502 | /* Rescue options */ |
503 | {Opt_rescue, "rescue=%s"}, | |
504 | /* Deprecated, with alias rescue=nologreplay */ | |
505 | {Opt_nologreplay, "nologreplay"}, | |
506 | /* Deprecated, with alias rescue=usebackuproot */ | |
507 | {Opt_usebackuproot, "usebackuproot"}, | |
508 | ||
416a7202 | 509 | /* Deprecated options */ |
416a7202 | 510 | {Opt_recovery, "recovery"}, |
416a7202 DS |
511 | |
512 | /* Debugging options */ | |
21adbd5c SB |
513 | {Opt_check_integrity, "check_int"}, |
514 | {Opt_check_integrity_including_extent_data, "check_int_data"}, | |
02453bde | 515 | {Opt_check_integrity_print_mask, "check_int_print_mask=%u"}, |
416a7202 DS |
516 | {Opt_enospc_debug, "enospc_debug"}, |
517 | {Opt_noenospc_debug, "noenospc_debug"}, | |
d0bd4560 JB |
518 | #ifdef CONFIG_BTRFS_DEBUG |
519 | {Opt_fragment_data, "fragment=data"}, | |
520 | {Opt_fragment_metadata, "fragment=metadata"}, | |
521 | {Opt_fragment_all, "fragment=all"}, | |
fb592373 JB |
522 | #endif |
523 | #ifdef CONFIG_BTRFS_FS_REF_VERIFY | |
524 | {Opt_ref_verify, "ref_verify"}, | |
d0bd4560 | 525 | #endif |
33268eaf | 526 | {Opt_err, NULL}, |
95e05289 CM |
527 | }; |
528 | ||
74ef0018 QW |
529 | static const match_table_t rescue_tokens = { |
530 | {Opt_usebackuproot, "usebackuproot"}, | |
531 | {Opt_nologreplay, "nologreplay"}, | |
42437a63 JB |
532 | {Opt_ignorebadroots, "ignorebadroots"}, |
533 | {Opt_ignorebadroots, "ibadroots"}, | |
882dbe0c JB |
534 | {Opt_ignoredatacsums, "ignoredatacsums"}, |
535 | {Opt_ignoredatacsums, "idatacsums"}, | |
9037d3cb | 536 | {Opt_rescue_all, "all"}, |
74ef0018 QW |
537 | {Opt_err, NULL}, |
538 | }; | |
539 | ||
d70bf748 JB |
540 | static bool check_ro_option(struct btrfs_fs_info *fs_info, unsigned long opt, |
541 | const char *opt_name) | |
542 | { | |
543 | if (fs_info->mount_opt & opt) { | |
544 | btrfs_err(fs_info, "%s must be used with ro mount option", | |
545 | opt_name); | |
546 | return true; | |
547 | } | |
548 | return false; | |
549 | } | |
550 | ||
74ef0018 QW |
551 | static int parse_rescue_options(struct btrfs_fs_info *info, const char *options) |
552 | { | |
553 | char *opts; | |
554 | char *orig; | |
555 | char *p; | |
556 | substring_t args[MAX_OPT_ARGS]; | |
557 | int ret = 0; | |
558 | ||
559 | opts = kstrdup(options, GFP_KERNEL); | |
560 | if (!opts) | |
561 | return -ENOMEM; | |
562 | orig = opts; | |
563 | ||
564 | while ((p = strsep(&opts, ":")) != NULL) { | |
565 | int token; | |
566 | ||
567 | if (!*p) | |
568 | continue; | |
569 | token = match_token(p, rescue_tokens, args); | |
570 | switch (token){ | |
571 | case Opt_usebackuproot: | |
572 | btrfs_info(info, | |
573 | "trying to use backup root at mount time"); | |
574 | btrfs_set_opt(info->mount_opt, USEBACKUPROOT); | |
575 | break; | |
576 | case Opt_nologreplay: | |
577 | btrfs_set_and_info(info, NOLOGREPLAY, | |
578 | "disabling log replay at mount time"); | |
579 | break; | |
42437a63 JB |
580 | case Opt_ignorebadroots: |
581 | btrfs_set_and_info(info, IGNOREBADROOTS, | |
582 | "ignoring bad roots"); | |
583 | break; | |
882dbe0c JB |
584 | case Opt_ignoredatacsums: |
585 | btrfs_set_and_info(info, IGNOREDATACSUMS, | |
586 | "ignoring data csums"); | |
587 | break; | |
9037d3cb JB |
588 | case Opt_rescue_all: |
589 | btrfs_info(info, "enabling all of the rescue options"); | |
590 | btrfs_set_and_info(info, IGNOREDATACSUMS, | |
591 | "ignoring data csums"); | |
592 | btrfs_set_and_info(info, IGNOREBADROOTS, | |
593 | "ignoring bad roots"); | |
594 | btrfs_set_and_info(info, NOLOGREPLAY, | |
595 | "disabling log replay at mount time"); | |
596 | break; | |
74ef0018 QW |
597 | case Opt_err: |
598 | btrfs_info(info, "unrecognized rescue option '%s'", p); | |
599 | ret = -EINVAL; | |
600 | goto out; | |
601 | default: | |
602 | break; | |
603 | } | |
604 | ||
605 | } | |
606 | out: | |
607 | kfree(orig); | |
608 | return ret; | |
609 | } | |
610 | ||
edf24abe CH |
611 | /* |
612 | * Regular mount options parser. Everything that is needed only when | |
613 | * reading in a new superblock is parsed here. | |
49b25e05 | 614 | * XXX JDM: This needs to be cleaned up for remount. |
edf24abe | 615 | */ |
2ff7e61e | 616 | int btrfs_parse_options(struct btrfs_fs_info *info, char *options, |
96da0919 | 617 | unsigned long new_flags) |
95e05289 | 618 | { |
95e05289 | 619 | substring_t args[MAX_OPT_ARGS]; |
e215772c | 620 | char *p, *num; |
4543df7e | 621 | int intarg; |
a7a3f7ca | 622 | int ret = 0; |
261507a0 LZ |
623 | char *compress_type; |
624 | bool compress_force = false; | |
b7c47bbb | 625 | enum btrfs_compression_type saved_compress_type; |
27942c99 | 626 | int saved_compress_level; |
b7c47bbb TI |
627 | bool saved_compress_force; |
628 | int no_compress = 0; | |
b6cda9bc | 629 | |
0b246afa | 630 | if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE)) |
70f6d82e | 631 | btrfs_set_opt(info->mount_opt, FREE_SPACE_TREE); |
94846229 | 632 | else if (btrfs_free_space_cache_v1_active(info)) { |
5d1ab66c NA |
633 | if (btrfs_is_zoned(info)) { |
634 | btrfs_info(info, | |
635 | "zoned: clearing existing space cache"); | |
636 | btrfs_set_super_cache_generation(info->super_copy, 0); | |
637 | } else { | |
638 | btrfs_set_opt(info->mount_opt, SPACE_CACHE); | |
639 | } | |
640 | } | |
73bc1876 | 641 | |
96da0919 QW |
642 | /* |
643 | * Even the options are empty, we still need to do extra check | |
644 | * against new flags | |
645 | */ | |
95e05289 | 646 | if (!options) |
96da0919 | 647 | goto check; |
95e05289 | 648 | |
edf24abe | 649 | while ((p = strsep(&options, ",")) != NULL) { |
95e05289 CM |
650 | int token; |
651 | if (!*p) | |
652 | continue; | |
653 | ||
654 | token = match_token(p, tokens, args); | |
655 | switch (token) { | |
dfe25020 | 656 | case Opt_degraded: |
0b246afa | 657 | btrfs_info(info, "allowing degraded mounts"); |
edf24abe | 658 | btrfs_set_opt(info->mount_opt, DEGRADED); |
dfe25020 | 659 | break; |
95e05289 | 660 | case Opt_subvol: |
37becec9 | 661 | case Opt_subvol_empty: |
73f73415 | 662 | case Opt_subvolid: |
43e570b0 | 663 | case Opt_device: |
edf24abe | 664 | /* |
fa59f27c AJ |
665 | * These are parsed by btrfs_parse_subvol_options or |
666 | * btrfs_parse_device_options and can be ignored here. | |
edf24abe | 667 | */ |
b6cda9bc CM |
668 | break; |
669 | case Opt_nodatasum: | |
3cdde224 | 670 | btrfs_set_and_info(info, NODATASUM, |
07802534 | 671 | "setting nodatasum"); |
be20aa9d | 672 | break; |
d399167d | 673 | case Opt_datasum: |
3cdde224 JM |
674 | if (btrfs_test_opt(info, NODATASUM)) { |
675 | if (btrfs_test_opt(info, NODATACOW)) | |
0b246afa | 676 | btrfs_info(info, |
5d163e0e | 677 | "setting datasum, datacow enabled"); |
07802534 | 678 | else |
0b246afa | 679 | btrfs_info(info, "setting datasum"); |
07802534 | 680 | } |
d399167d QW |
681 | btrfs_clear_opt(info->mount_opt, NODATACOW); |
682 | btrfs_clear_opt(info->mount_opt, NODATASUM); | |
683 | break; | |
be20aa9d | 684 | case Opt_nodatacow: |
3cdde224 JM |
685 | if (!btrfs_test_opt(info, NODATACOW)) { |
686 | if (!btrfs_test_opt(info, COMPRESS) || | |
687 | !btrfs_test_opt(info, FORCE_COMPRESS)) { | |
0b246afa | 688 | btrfs_info(info, |
07802534 QW |
689 | "setting nodatacow, compression disabled"); |
690 | } else { | |
0b246afa | 691 | btrfs_info(info, "setting nodatacow"); |
07802534 | 692 | } |
bedb2cca | 693 | } |
bedb2cca AP |
694 | btrfs_clear_opt(info->mount_opt, COMPRESS); |
695 | btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); | |
edf24abe CH |
696 | btrfs_set_opt(info->mount_opt, NODATACOW); |
697 | btrfs_set_opt(info->mount_opt, NODATASUM); | |
95e05289 | 698 | break; |
a258af7a | 699 | case Opt_datacow: |
3cdde224 | 700 | btrfs_clear_and_info(info, NODATACOW, |
07802534 | 701 | "setting datacow"); |
a258af7a | 702 | break; |
a555f810 | 703 | case Opt_compress_force: |
261507a0 LZ |
704 | case Opt_compress_force_type: |
705 | compress_force = true; | |
c730ae0c | 706 | fallthrough; |
261507a0 LZ |
707 | case Opt_compress: |
708 | case Opt_compress_type: | |
3cdde224 JM |
709 | saved_compress_type = btrfs_test_opt(info, |
710 | COMPRESS) ? | |
b7c47bbb TI |
711 | info->compress_type : BTRFS_COMPRESS_NONE; |
712 | saved_compress_force = | |
3cdde224 | 713 | btrfs_test_opt(info, FORCE_COMPRESS); |
27942c99 | 714 | saved_compress_level = info->compress_level; |
261507a0 LZ |
715 | if (token == Opt_compress || |
716 | token == Opt_compress_force || | |
a7164fa4 | 717 | strncmp(args[0].from, "zlib", 4) == 0) { |
261507a0 | 718 | compress_type = "zlib"; |
eae8d825 | 719 | |
261507a0 | 720 | info->compress_type = BTRFS_COMPRESS_ZLIB; |
eae8d825 QW |
721 | info->compress_level = BTRFS_ZLIB_DEFAULT_LEVEL; |
722 | /* | |
723 | * args[0] contains uninitialized data since | |
724 | * for these tokens we don't expect any | |
725 | * parameter. | |
726 | */ | |
727 | if (token != Opt_compress && | |
728 | token != Opt_compress_force) | |
729 | info->compress_level = | |
d0ab62ce DZ |
730 | btrfs_compress_str2level( |
731 | BTRFS_COMPRESS_ZLIB, | |
732 | args[0].from + 4); | |
063849ea | 733 | btrfs_set_opt(info->mount_opt, COMPRESS); |
bedb2cca AP |
734 | btrfs_clear_opt(info->mount_opt, NODATACOW); |
735 | btrfs_clear_opt(info->mount_opt, NODATASUM); | |
b7c47bbb | 736 | no_compress = 0; |
a7164fa4 | 737 | } else if (strncmp(args[0].from, "lzo", 3) == 0) { |
a6fa6fae LZ |
738 | compress_type = "lzo"; |
739 | info->compress_type = BTRFS_COMPRESS_LZO; | |
282dd7d7 | 740 | info->compress_level = 0; |
063849ea | 741 | btrfs_set_opt(info->mount_opt, COMPRESS); |
bedb2cca AP |
742 | btrfs_clear_opt(info->mount_opt, NODATACOW); |
743 | btrfs_clear_opt(info->mount_opt, NODATASUM); | |
2b0ce2c2 | 744 | btrfs_set_fs_incompat(info, COMPRESS_LZO); |
b7c47bbb | 745 | no_compress = 0; |
3f93aef5 | 746 | } else if (strncmp(args[0].from, "zstd", 4) == 0) { |
5c1aab1d NT |
747 | compress_type = "zstd"; |
748 | info->compress_type = BTRFS_COMPRESS_ZSTD; | |
3f93aef5 DZ |
749 | info->compress_level = |
750 | btrfs_compress_str2level( | |
751 | BTRFS_COMPRESS_ZSTD, | |
752 | args[0].from + 4); | |
5c1aab1d NT |
753 | btrfs_set_opt(info->mount_opt, COMPRESS); |
754 | btrfs_clear_opt(info->mount_opt, NODATACOW); | |
755 | btrfs_clear_opt(info->mount_opt, NODATASUM); | |
756 | btrfs_set_fs_incompat(info, COMPRESS_ZSTD); | |
757 | no_compress = 0; | |
063849ea AH |
758 | } else if (strncmp(args[0].from, "no", 2) == 0) { |
759 | compress_type = "no"; | |
27942c99 DS |
760 | info->compress_level = 0; |
761 | info->compress_type = 0; | |
063849ea AH |
762 | btrfs_clear_opt(info->mount_opt, COMPRESS); |
763 | btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); | |
764 | compress_force = false; | |
b7c47bbb | 765 | no_compress++; |
261507a0 | 766 | } else { |
e3a4167c DS |
767 | btrfs_err(info, "unrecognized compression value %s", |
768 | args[0].from); | |
261507a0 LZ |
769 | ret = -EINVAL; |
770 | goto out; | |
771 | } | |
772 | ||
261507a0 | 773 | if (compress_force) { |
b7c47bbb | 774 | btrfs_set_opt(info->mount_opt, FORCE_COMPRESS); |
143f3636 | 775 | } else { |
4027e0f4 WS |
776 | /* |
777 | * If we remount from compress-force=xxx to | |
778 | * compress=xxx, we need clear FORCE_COMPRESS | |
779 | * flag, otherwise, there is no way for users | |
780 | * to disable forcible compression separately. | |
781 | */ | |
782 | btrfs_clear_opt(info->mount_opt, FORCE_COMPRESS); | |
a7e252af | 783 | } |
27942c99 DS |
784 | if (no_compress == 1) { |
785 | btrfs_info(info, "use no compression"); | |
786 | } else if ((info->compress_type != saved_compress_type) || | |
787 | (compress_force != saved_compress_force) || | |
788 | (info->compress_level != saved_compress_level)) { | |
f51d2b59 | 789 | btrfs_info(info, "%s %s compression, level %d", |
b7c47bbb | 790 | (compress_force) ? "force" : "use", |
f51d2b59 | 791 | compress_type, info->compress_level); |
b7c47bbb TI |
792 | } |
793 | compress_force = false; | |
a555f810 | 794 | break; |
e18e4809 | 795 | case Opt_ssd: |
3cdde224 | 796 | btrfs_set_and_info(info, SSD, |
583b7231 | 797 | "enabling ssd optimizations"); |
951e7966 | 798 | btrfs_clear_opt(info->mount_opt, NOSSD); |
e18e4809 | 799 | break; |
451d7585 | 800 | case Opt_ssd_spread: |
583b7231 HK |
801 | btrfs_set_and_info(info, SSD, |
802 | "enabling ssd optimizations"); | |
3cdde224 | 803 | btrfs_set_and_info(info, SSD_SPREAD, |
583b7231 | 804 | "using spread ssd allocation scheme"); |
951e7966 | 805 | btrfs_clear_opt(info->mount_opt, NOSSD); |
451d7585 | 806 | break; |
3b30c22f | 807 | case Opt_nossd: |
583b7231 HK |
808 | btrfs_set_opt(info->mount_opt, NOSSD); |
809 | btrfs_clear_and_info(info, SSD, | |
810 | "not using ssd optimizations"); | |
c730ae0c | 811 | fallthrough; |
62b8e077 | 812 | case Opt_nossd_spread: |
583b7231 HK |
813 | btrfs_clear_and_info(info, SSD_SPREAD, |
814 | "not using spread ssd allocation scheme"); | |
3b30c22f | 815 | break; |
842bef58 | 816 | case Opt_barrier: |
3cdde224 | 817 | btrfs_clear_and_info(info, NOBARRIER, |
07802534 | 818 | "turning on barriers"); |
842bef58 | 819 | break; |
21ad10cf | 820 | case Opt_nobarrier: |
3cdde224 | 821 | btrfs_set_and_info(info, NOBARRIER, |
07802534 | 822 | "turning off barriers"); |
21ad10cf | 823 | break; |
4543df7e | 824 | case Opt_thread_pool: |
2c334e87 WS |
825 | ret = match_int(&args[0], &intarg); |
826 | if (ret) { | |
e3a4167c DS |
827 | btrfs_err(info, "unrecognized thread_pool value %s", |
828 | args[0].from); | |
2c334e87 | 829 | goto out; |
f7b885be | 830 | } else if (intarg == 0) { |
e3a4167c | 831 | btrfs_err(info, "invalid value 0 for thread_pool"); |
2c334e87 WS |
832 | ret = -EINVAL; |
833 | goto out; | |
834 | } | |
f7b885be | 835 | info->thread_pool_size = intarg; |
4543df7e | 836 | break; |
6f568d35 | 837 | case Opt_max_inline: |
edf24abe CH |
838 | num = match_strdup(&args[0]); |
839 | if (num) { | |
91748467 | 840 | info->max_inline = memparse(num, NULL); |
edf24abe CH |
841 | kfree(num); |
842 | ||
15ada040 | 843 | if (info->max_inline) { |
feb5f965 | 844 | info->max_inline = min_t(u64, |
15ada040 | 845 | info->max_inline, |
0b246afa | 846 | info->sectorsize); |
15ada040 | 847 | } |
0b246afa JM |
848 | btrfs_info(info, "max_inline at %llu", |
849 | info->max_inline); | |
2c334e87 WS |
850 | } else { |
851 | ret = -ENOMEM; | |
852 | goto out; | |
6f568d35 CM |
853 | } |
854 | break; | |
bd0330ad | 855 | case Opt_acl: |
45ff35d6 | 856 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
1751e8a6 | 857 | info->sb->s_flags |= SB_POSIXACL; |
bd0330ad | 858 | break; |
45ff35d6 | 859 | #else |
0b246afa | 860 | btrfs_err(info, "support for ACL not compiled in!"); |
45ff35d6 GZ |
861 | ret = -EINVAL; |
862 | goto out; | |
863 | #endif | |
33268eaf | 864 | case Opt_noacl: |
1751e8a6 | 865 | info->sb->s_flags &= ~SB_POSIXACL; |
33268eaf | 866 | break; |
3a5e1404 | 867 | case Opt_notreelog: |
3cdde224 | 868 | btrfs_set_and_info(info, NOTREELOG, |
07802534 | 869 | "disabling tree log"); |
a88998f2 QW |
870 | break; |
871 | case Opt_treelog: | |
3cdde224 | 872 | btrfs_clear_and_info(info, NOTREELOG, |
07802534 | 873 | "enabling tree log"); |
3a5e1404 | 874 | break; |
fed8f166 | 875 | case Opt_norecovery: |
96da0919 | 876 | case Opt_nologreplay: |
74ef0018 QW |
877 | btrfs_warn(info, |
878 | "'nologreplay' is deprecated, use 'rescue=nologreplay' instead"); | |
3cdde224 | 879 | btrfs_set_and_info(info, NOLOGREPLAY, |
96da0919 QW |
880 | "disabling log replay at mount time"); |
881 | break; | |
dccae999 | 882 | case Opt_flushoncommit: |
3cdde224 | 883 | btrfs_set_and_info(info, FLUSHONCOMMIT, |
07802534 | 884 | "turning on flush-on-commit"); |
dccae999 | 885 | break; |
2c9ee856 | 886 | case Opt_noflushoncommit: |
3cdde224 | 887 | btrfs_clear_and_info(info, FLUSHONCOMMIT, |
07802534 | 888 | "turning off flush-on-commit"); |
2c9ee856 | 889 | break; |
97e728d4 | 890 | case Opt_ratio: |
2c334e87 | 891 | ret = match_int(&args[0], &intarg); |
e3a4167c DS |
892 | if (ret) { |
893 | btrfs_err(info, "unrecognized metadata_ratio value %s", | |
894 | args[0].from); | |
2c334e87 | 895 | goto out; |
e3a4167c | 896 | } |
764cb8b4 AJ |
897 | info->metadata_ratio = intarg; |
898 | btrfs_info(info, "metadata ratio %u", | |
899 | info->metadata_ratio); | |
97e728d4 | 900 | break; |
e244a0ae | 901 | case Opt_discard: |
b0643e59 DZ |
902 | case Opt_discard_mode: |
903 | if (token == Opt_discard || | |
904 | strcmp(args[0].from, "sync") == 0) { | |
905 | btrfs_clear_opt(info->mount_opt, DISCARD_ASYNC); | |
906 | btrfs_set_and_info(info, DISCARD_SYNC, | |
907 | "turning on sync discard"); | |
908 | } else if (strcmp(args[0].from, "async") == 0) { | |
909 | btrfs_clear_opt(info->mount_opt, DISCARD_SYNC); | |
910 | btrfs_set_and_info(info, DISCARD_ASYNC, | |
911 | "turning on async discard"); | |
912 | } else { | |
e3a4167c DS |
913 | btrfs_err(info, "unrecognized discard mode value %s", |
914 | args[0].from); | |
b0643e59 DZ |
915 | ret = -EINVAL; |
916 | goto out; | |
917 | } | |
e244a0ae | 918 | break; |
e07a2ade | 919 | case Opt_nodiscard: |
46b27f50 | 920 | btrfs_clear_and_info(info, DISCARD_SYNC, |
07802534 | 921 | "turning off discard"); |
b0643e59 DZ |
922 | btrfs_clear_and_info(info, DISCARD_ASYNC, |
923 | "turning off async discard"); | |
e07a2ade | 924 | break; |
0af3d00b | 925 | case Opt_space_cache: |
70f6d82e | 926 | case Opt_space_cache_version: |
63cd070d JB |
927 | /* |
928 | * We already set FREE_SPACE_TREE above because we have | |
929 | * compat_ro(FREE_SPACE_TREE) set, and we aren't going | |
930 | * to allow v1 to be set for extent tree v2, simply | |
931 | * ignore this setting if we're extent tree v2. | |
932 | */ | |
933 | if (btrfs_fs_incompat(info, EXTENT_TREE_V2)) | |
934 | break; | |
70f6d82e OS |
935 | if (token == Opt_space_cache || |
936 | strcmp(args[0].from, "v1") == 0) { | |
0b246afa | 937 | btrfs_clear_opt(info->mount_opt, |
70f6d82e | 938 | FREE_SPACE_TREE); |
3cdde224 | 939 | btrfs_set_and_info(info, SPACE_CACHE, |
0b246afa | 940 | "enabling disk space caching"); |
70f6d82e | 941 | } else if (strcmp(args[0].from, "v2") == 0) { |
0b246afa | 942 | btrfs_clear_opt(info->mount_opt, |
70f6d82e | 943 | SPACE_CACHE); |
0b246afa | 944 | btrfs_set_and_info(info, FREE_SPACE_TREE, |
70f6d82e OS |
945 | "enabling free space tree"); |
946 | } else { | |
e3a4167c DS |
947 | btrfs_err(info, "unrecognized space_cache value %s", |
948 | args[0].from); | |
70f6d82e OS |
949 | ret = -EINVAL; |
950 | goto out; | |
951 | } | |
0de90876 | 952 | break; |
f420ee1e SB |
953 | case Opt_rescan_uuid_tree: |
954 | btrfs_set_opt(info->mount_opt, RESCAN_UUID_TREE); | |
955 | break; | |
73bc1876 | 956 | case Opt_no_space_cache: |
63cd070d JB |
957 | /* |
958 | * We cannot operate without the free space tree with | |
959 | * extent tree v2, ignore this option. | |
960 | */ | |
961 | if (btrfs_fs_incompat(info, EXTENT_TREE_V2)) | |
962 | break; | |
3cdde224 | 963 | if (btrfs_test_opt(info, SPACE_CACHE)) { |
0b246afa JM |
964 | btrfs_clear_and_info(info, SPACE_CACHE, |
965 | "disabling disk space caching"); | |
70f6d82e | 966 | } |
3cdde224 | 967 | if (btrfs_test_opt(info, FREE_SPACE_TREE)) { |
0b246afa JM |
968 | btrfs_clear_and_info(info, FREE_SPACE_TREE, |
969 | "disabling free space tree"); | |
70f6d82e | 970 | } |
73bc1876 | 971 | break; |
4b9465cb | 972 | case Opt_inode_cache: |
3818aea2 | 973 | case Opt_noinode_cache: |
5297199a NB |
974 | btrfs_warn(info, |
975 | "the 'inode_cache' option is deprecated and has no effect since 5.11"); | |
4b9465cb | 976 | break; |
88c2ba3b | 977 | case Opt_clear_cache: |
63cd070d JB |
978 | /* |
979 | * We cannot clear the free space tree with extent tree | |
980 | * v2, ignore this option. | |
981 | */ | |
982 | if (btrfs_fs_incompat(info, EXTENT_TREE_V2)) | |
983 | break; | |
3cdde224 | 984 | btrfs_set_and_info(info, CLEAR_CACHE, |
07802534 | 985 | "force clearing of disk cache"); |
0af3d00b | 986 | break; |
4260f7c7 SW |
987 | case Opt_user_subvol_rm_allowed: |
988 | btrfs_set_opt(info->mount_opt, USER_SUBVOL_RM_ALLOWED); | |
989 | break; | |
91435650 CM |
990 | case Opt_enospc_debug: |
991 | btrfs_set_opt(info->mount_opt, ENOSPC_DEBUG); | |
992 | break; | |
53036293 QW |
993 | case Opt_noenospc_debug: |
994 | btrfs_clear_opt(info->mount_opt, ENOSPC_DEBUG); | |
995 | break; | |
4cb5300b | 996 | case Opt_defrag: |
3cdde224 | 997 | btrfs_set_and_info(info, AUTO_DEFRAG, |
07802534 | 998 | "enabling auto defrag"); |
4cb5300b | 999 | break; |
fc0ca9af | 1000 | case Opt_nodefrag: |
3cdde224 | 1001 | btrfs_clear_and_info(info, AUTO_DEFRAG, |
07802534 | 1002 | "disabling auto defrag"); |
fc0ca9af | 1003 | break; |
af31f5e5 | 1004 | case Opt_recovery: |
8dcddfa0 | 1005 | case Opt_usebackuproot: |
74ef0018 QW |
1006 | btrfs_warn(info, |
1007 | "'%s' is deprecated, use 'rescue=usebackuproot' instead", | |
1008 | token == Opt_recovery ? "recovery" : | |
1009 | "usebackuproot"); | |
0b246afa | 1010 | btrfs_info(info, |
8dcddfa0 QW |
1011 | "trying to use backup root at mount time"); |
1012 | btrfs_set_opt(info->mount_opt, USEBACKUPROOT); | |
af31f5e5 | 1013 | break; |
9555c6c1 ID |
1014 | case Opt_skip_balance: |
1015 | btrfs_set_opt(info->mount_opt, SKIP_BALANCE); | |
1016 | break; | |
21adbd5c SB |
1017 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
1018 | case Opt_check_integrity_including_extent_data: | |
0b246afa | 1019 | btrfs_info(info, |
efe120a0 | 1020 | "enabling check integrity including extent data"); |
cbeaae4f | 1021 | btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY_DATA); |
21adbd5c SB |
1022 | btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY); |
1023 | break; | |
1024 | case Opt_check_integrity: | |
0b246afa | 1025 | btrfs_info(info, "enabling check integrity"); |
21adbd5c SB |
1026 | btrfs_set_opt(info->mount_opt, CHECK_INTEGRITY); |
1027 | break; | |
1028 | case Opt_check_integrity_print_mask: | |
2c334e87 | 1029 | ret = match_int(&args[0], &intarg); |
e3a4167c DS |
1030 | if (ret) { |
1031 | btrfs_err(info, | |
1032 | "unrecognized check_integrity_print_mask value %s", | |
1033 | args[0].from); | |
2c334e87 | 1034 | goto out; |
e3a4167c | 1035 | } |
02453bde AJ |
1036 | info->check_integrity_print_mask = intarg; |
1037 | btrfs_info(info, "check_integrity_print_mask 0x%x", | |
1038 | info->check_integrity_print_mask); | |
21adbd5c SB |
1039 | break; |
1040 | #else | |
1041 | case Opt_check_integrity_including_extent_data: | |
1042 | case Opt_check_integrity: | |
1043 | case Opt_check_integrity_print_mask: | |
0b246afa JM |
1044 | btrfs_err(info, |
1045 | "support for check_integrity* not compiled in!"); | |
21adbd5c SB |
1046 | ret = -EINVAL; |
1047 | goto out; | |
1048 | #endif | |
8c342930 | 1049 | case Opt_fatal_errors: |
e3a4167c | 1050 | if (strcmp(args[0].from, "panic") == 0) { |
8c342930 JM |
1051 | btrfs_set_opt(info->mount_opt, |
1052 | PANIC_ON_FATAL_ERROR); | |
e3a4167c | 1053 | } else if (strcmp(args[0].from, "bug") == 0) { |
8c342930 JM |
1054 | btrfs_clear_opt(info->mount_opt, |
1055 | PANIC_ON_FATAL_ERROR); | |
e3a4167c DS |
1056 | } else { |
1057 | btrfs_err(info, "unrecognized fatal_errors value %s", | |
1058 | args[0].from); | |
8c342930 JM |
1059 | ret = -EINVAL; |
1060 | goto out; | |
1061 | } | |
1062 | break; | |
8b87dc17 DS |
1063 | case Opt_commit_interval: |
1064 | intarg = 0; | |
1065 | ret = match_int(&args[0], &intarg); | |
e3a4167c DS |
1066 | if (ret) { |
1067 | btrfs_err(info, "unrecognized commit_interval value %s", | |
1068 | args[0].from); | |
1069 | ret = -EINVAL; | |
8b87dc17 | 1070 | goto out; |
e3a4167c | 1071 | } |
d3740608 | 1072 | if (intarg == 0) { |
0b246afa | 1073 | btrfs_info(info, |
d3740608 | 1074 | "using default commit interval %us", |
5d163e0e | 1075 | BTRFS_DEFAULT_COMMIT_INTERVAL); |
d3740608 AJ |
1076 | intarg = BTRFS_DEFAULT_COMMIT_INTERVAL; |
1077 | } else if (intarg > 300) { | |
1078 | btrfs_warn(info, "excessive commit interval %d", | |
1079 | intarg); | |
8b87dc17 | 1080 | } |
d3740608 | 1081 | info->commit_interval = intarg; |
8b87dc17 | 1082 | break; |
74ef0018 QW |
1083 | case Opt_rescue: |
1084 | ret = parse_rescue_options(info, args[0].from); | |
e3a4167c DS |
1085 | if (ret < 0) { |
1086 | btrfs_err(info, "unrecognized rescue value %s", | |
1087 | args[0].from); | |
74ef0018 | 1088 | goto out; |
e3a4167c | 1089 | } |
74ef0018 | 1090 | break; |
d0bd4560 JB |
1091 | #ifdef CONFIG_BTRFS_DEBUG |
1092 | case Opt_fragment_all: | |
0b246afa | 1093 | btrfs_info(info, "fragmenting all space"); |
d0bd4560 JB |
1094 | btrfs_set_opt(info->mount_opt, FRAGMENT_DATA); |
1095 | btrfs_set_opt(info->mount_opt, FRAGMENT_METADATA); | |
1096 | break; | |
1097 | case Opt_fragment_metadata: | |
0b246afa | 1098 | btrfs_info(info, "fragmenting metadata"); |
d0bd4560 JB |
1099 | btrfs_set_opt(info->mount_opt, |
1100 | FRAGMENT_METADATA); | |
1101 | break; | |
1102 | case Opt_fragment_data: | |
0b246afa | 1103 | btrfs_info(info, "fragmenting data"); |
d0bd4560 JB |
1104 | btrfs_set_opt(info->mount_opt, FRAGMENT_DATA); |
1105 | break; | |
fb592373 JB |
1106 | #endif |
1107 | #ifdef CONFIG_BTRFS_FS_REF_VERIFY | |
1108 | case Opt_ref_verify: | |
1109 | btrfs_info(info, "doing ref verification"); | |
1110 | btrfs_set_opt(info->mount_opt, REF_VERIFY); | |
1111 | break; | |
d0bd4560 | 1112 | #endif |
a7a3f7ca | 1113 | case Opt_err: |
7e8f19e5 | 1114 | btrfs_err(info, "unrecognized mount option '%s'", p); |
a7a3f7ca SW |
1115 | ret = -EINVAL; |
1116 | goto out; | |
95e05289 | 1117 | default: |
be20aa9d | 1118 | break; |
95e05289 CM |
1119 | } |
1120 | } | |
96da0919 | 1121 | check: |
d70bf748 JB |
1122 | /* We're read-only, don't have to check. */ |
1123 | if (new_flags & SB_RDONLY) | |
1124 | goto out; | |
1125 | ||
42437a63 | 1126 | if (check_ro_option(info, BTRFS_MOUNT_NOLOGREPLAY, "nologreplay") || |
882dbe0c JB |
1127 | check_ro_option(info, BTRFS_MOUNT_IGNOREBADROOTS, "ignorebadroots") || |
1128 | check_ro_option(info, BTRFS_MOUNT_IGNOREDATACSUMS, "ignoredatacsums")) | |
96da0919 | 1129 | ret = -EINVAL; |
a7a3f7ca | 1130 | out: |
0b246afa | 1131 | if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE) && |
3cdde224 JM |
1132 | !btrfs_test_opt(info, FREE_SPACE_TREE) && |
1133 | !btrfs_test_opt(info, CLEAR_CACHE)) { | |
0b246afa | 1134 | btrfs_err(info, "cannot disable free space tree"); |
70f6d82e OS |
1135 | ret = -EINVAL; |
1136 | ||
1137 | } | |
5d1ab66c NA |
1138 | if (!ret) |
1139 | ret = btrfs_check_mountopts_zoned(info); | |
3cdde224 | 1140 | if (!ret && btrfs_test_opt(info, SPACE_CACHE)) |
0b246afa | 1141 | btrfs_info(info, "disk space caching is enabled"); |
3cdde224 | 1142 | if (!ret && btrfs_test_opt(info, FREE_SPACE_TREE)) |
0b246afa | 1143 | btrfs_info(info, "using free space tree"); |
a7a3f7ca | 1144 | return ret; |
edf24abe CH |
1145 | } |
1146 | ||
1147 | /* | |
1148 | * Parse mount options that are required early in the mount process. | |
1149 | * | |
1150 | * All other options will be parsed on much later in the mount process and | |
1151 | * only when we need to allocate a new super block. | |
1152 | */ | |
fa59f27c AJ |
1153 | static int btrfs_parse_device_options(const char *options, fmode_t flags, |
1154 | void *holder) | |
edf24abe CH |
1155 | { |
1156 | substring_t args[MAX_OPT_ARGS]; | |
83c8c9bd | 1157 | char *device_name, *opts, *orig, *p; |
36350e95 | 1158 | struct btrfs_device *device = NULL; |
d7407606 MT |
1159 | int error = 0; |
1160 | ||
5139cff5 DS |
1161 | lockdep_assert_held(&uuid_mutex); |
1162 | ||
d7407606 MT |
1163 | if (!options) |
1164 | return 0; | |
1165 | ||
1166 | /* | |
1167 | * strsep changes the string, duplicate it because btrfs_parse_options | |
1168 | * gets called later | |
1169 | */ | |
1170 | opts = kstrdup(options, GFP_KERNEL); | |
1171 | if (!opts) | |
1172 | return -ENOMEM; | |
1173 | orig = opts; | |
1174 | ||
1175 | while ((p = strsep(&opts, ",")) != NULL) { | |
1176 | int token; | |
1177 | ||
1178 | if (!*p) | |
1179 | continue; | |
1180 | ||
1181 | token = match_token(p, tokens, args); | |
1182 | if (token == Opt_device) { | |
1183 | device_name = match_strdup(&args[0]); | |
1184 | if (!device_name) { | |
1185 | error = -ENOMEM; | |
1186 | goto out; | |
1187 | } | |
36350e95 GJ |
1188 | device = btrfs_scan_one_device(device_name, flags, |
1189 | holder); | |
d7407606 | 1190 | kfree(device_name); |
36350e95 GJ |
1191 | if (IS_ERR(device)) { |
1192 | error = PTR_ERR(device); | |
d7407606 | 1193 | goto out; |
36350e95 | 1194 | } |
d7407606 MT |
1195 | } |
1196 | } | |
1197 | ||
1198 | out: | |
1199 | kfree(orig); | |
1200 | return error; | |
1201 | } | |
1202 | ||
1203 | /* | |
1204 | * Parse mount options that are related to subvolume id | |
1205 | * | |
1206 | * The value is later passed to mount_subvol() | |
1207 | */ | |
93b9bcdf GJ |
1208 | static int btrfs_parse_subvol_options(const char *options, char **subvol_name, |
1209 | u64 *subvol_objectid) | |
d7407606 MT |
1210 | { |
1211 | substring_t args[MAX_OPT_ARGS]; | |
1212 | char *opts, *orig, *p; | |
edf24abe | 1213 | int error = 0; |
ccb0e7d1 | 1214 | u64 subvolid; |
edf24abe CH |
1215 | |
1216 | if (!options) | |
830c4adb | 1217 | return 0; |
edf24abe CH |
1218 | |
1219 | /* | |
d7407606 | 1220 | * strsep changes the string, duplicate it because |
fa59f27c | 1221 | * btrfs_parse_device_options gets called later |
edf24abe CH |
1222 | */ |
1223 | opts = kstrdup(options, GFP_KERNEL); | |
1224 | if (!opts) | |
1225 | return -ENOMEM; | |
3f3d0bc0 | 1226 | orig = opts; |
edf24abe CH |
1227 | |
1228 | while ((p = strsep(&opts, ",")) != NULL) { | |
1229 | int token; | |
1230 | if (!*p) | |
1231 | continue; | |
1232 | ||
1233 | token = match_token(p, tokens, args); | |
1234 | switch (token) { | |
1235 | case Opt_subvol: | |
a90e8b6f | 1236 | kfree(*subvol_name); |
edf24abe | 1237 | *subvol_name = match_strdup(&args[0]); |
2c334e87 WS |
1238 | if (!*subvol_name) { |
1239 | error = -ENOMEM; | |
1240 | goto out; | |
1241 | } | |
edf24abe | 1242 | break; |
73f73415 | 1243 | case Opt_subvolid: |
ccb0e7d1 AJ |
1244 | error = match_u64(&args[0], &subvolid); |
1245 | if (error) | |
2c334e87 | 1246 | goto out; |
ccb0e7d1 AJ |
1247 | |
1248 | /* we want the original fs_tree */ | |
1249 | if (subvolid == 0) | |
1250 | subvolid = BTRFS_FS_TREE_OBJECTID; | |
1251 | ||
1252 | *subvol_objectid = subvolid; | |
73f73415 | 1253 | break; |
edf24abe CH |
1254 | default: |
1255 | break; | |
1256 | } | |
1257 | } | |
1258 | ||
830c4adb | 1259 | out: |
3f3d0bc0 | 1260 | kfree(orig); |
edf24abe | 1261 | return error; |
95e05289 CM |
1262 | } |
1263 | ||
c0c907a4 MPS |
1264 | char *btrfs_get_subvol_name_from_objectid(struct btrfs_fs_info *fs_info, |
1265 | u64 subvol_objectid) | |
73f73415 | 1266 | { |
815745cf | 1267 | struct btrfs_root *root = fs_info->tree_root; |
5168489a | 1268 | struct btrfs_root *fs_root = NULL; |
05dbe683 OS |
1269 | struct btrfs_root_ref *root_ref; |
1270 | struct btrfs_inode_ref *inode_ref; | |
1271 | struct btrfs_key key; | |
1272 | struct btrfs_path *path = NULL; | |
1273 | char *name = NULL, *ptr; | |
1274 | u64 dirid; | |
1275 | int len; | |
1276 | int ret; | |
1277 | ||
1278 | path = btrfs_alloc_path(); | |
1279 | if (!path) { | |
1280 | ret = -ENOMEM; | |
1281 | goto err; | |
1282 | } | |
05dbe683 | 1283 | |
3ec83621 | 1284 | name = kmalloc(PATH_MAX, GFP_KERNEL); |
05dbe683 OS |
1285 | if (!name) { |
1286 | ret = -ENOMEM; | |
1287 | goto err; | |
1288 | } | |
1289 | ptr = name + PATH_MAX - 1; | |
1290 | ptr[0] = '\0'; | |
73f73415 JB |
1291 | |
1292 | /* | |
05dbe683 OS |
1293 | * Walk up the subvolume trees in the tree of tree roots by root |
1294 | * backrefs until we hit the top-level subvolume. | |
73f73415 | 1295 | */ |
05dbe683 OS |
1296 | while (subvol_objectid != BTRFS_FS_TREE_OBJECTID) { |
1297 | key.objectid = subvol_objectid; | |
1298 | key.type = BTRFS_ROOT_BACKREF_KEY; | |
1299 | key.offset = (u64)-1; | |
1300 | ||
0ff40a91 | 1301 | ret = btrfs_search_backwards(root, &key, path); |
05dbe683 OS |
1302 | if (ret < 0) { |
1303 | goto err; | |
1304 | } else if (ret > 0) { | |
0ff40a91 MPS |
1305 | ret = -ENOENT; |
1306 | goto err; | |
05dbe683 OS |
1307 | } |
1308 | ||
05dbe683 OS |
1309 | subvol_objectid = key.offset; |
1310 | ||
1311 | root_ref = btrfs_item_ptr(path->nodes[0], path->slots[0], | |
1312 | struct btrfs_root_ref); | |
1313 | len = btrfs_root_ref_name_len(path->nodes[0], root_ref); | |
1314 | ptr -= len + 1; | |
1315 | if (ptr < name) { | |
1316 | ret = -ENAMETOOLONG; | |
1317 | goto err; | |
1318 | } | |
1319 | read_extent_buffer(path->nodes[0], ptr + 1, | |
1320 | (unsigned long)(root_ref + 1), len); | |
1321 | ptr[0] = '/'; | |
1322 | dirid = btrfs_root_ref_dirid(path->nodes[0], root_ref); | |
1323 | btrfs_release_path(path); | |
1324 | ||
56e9357a | 1325 | fs_root = btrfs_get_fs_root(fs_info, subvol_objectid, true); |
05dbe683 OS |
1326 | if (IS_ERR(fs_root)) { |
1327 | ret = PTR_ERR(fs_root); | |
5168489a JB |
1328 | fs_root = NULL; |
1329 | goto err; | |
1330 | } | |
05dbe683 OS |
1331 | |
1332 | /* | |
1333 | * Walk up the filesystem tree by inode refs until we hit the | |
1334 | * root directory. | |
1335 | */ | |
1336 | while (dirid != BTRFS_FIRST_FREE_OBJECTID) { | |
1337 | key.objectid = dirid; | |
1338 | key.type = BTRFS_INODE_REF_KEY; | |
1339 | key.offset = (u64)-1; | |
1340 | ||
0ff40a91 | 1341 | ret = btrfs_search_backwards(fs_root, &key, path); |
05dbe683 OS |
1342 | if (ret < 0) { |
1343 | goto err; | |
1344 | } else if (ret > 0) { | |
0ff40a91 MPS |
1345 | ret = -ENOENT; |
1346 | goto err; | |
05dbe683 OS |
1347 | } |
1348 | ||
05dbe683 OS |
1349 | dirid = key.offset; |
1350 | ||
1351 | inode_ref = btrfs_item_ptr(path->nodes[0], | |
1352 | path->slots[0], | |
1353 | struct btrfs_inode_ref); | |
1354 | len = btrfs_inode_ref_name_len(path->nodes[0], | |
1355 | inode_ref); | |
1356 | ptr -= len + 1; | |
1357 | if (ptr < name) { | |
1358 | ret = -ENAMETOOLONG; | |
1359 | goto err; | |
1360 | } | |
1361 | read_extent_buffer(path->nodes[0], ptr + 1, | |
1362 | (unsigned long)(inode_ref + 1), len); | |
1363 | ptr[0] = '/'; | |
1364 | btrfs_release_path(path); | |
1365 | } | |
00246528 | 1366 | btrfs_put_root(fs_root); |
5168489a | 1367 | fs_root = NULL; |
73f73415 JB |
1368 | } |
1369 | ||
05dbe683 OS |
1370 | btrfs_free_path(path); |
1371 | if (ptr == name + PATH_MAX - 1) { | |
1372 | name[0] = '/'; | |
1373 | name[1] = '\0'; | |
1374 | } else { | |
1375 | memmove(name, ptr, name + PATH_MAX - ptr); | |
1376 | } | |
1377 | return name; | |
1378 | ||
1379 | err: | |
00246528 | 1380 | btrfs_put_root(fs_root); |
05dbe683 OS |
1381 | btrfs_free_path(path); |
1382 | kfree(name); | |
1383 | return ERR_PTR(ret); | |
1384 | } | |
1385 | ||
1386 | static int get_default_subvol_objectid(struct btrfs_fs_info *fs_info, u64 *objectid) | |
1387 | { | |
1388 | struct btrfs_root *root = fs_info->tree_root; | |
1389 | struct btrfs_dir_item *di; | |
1390 | struct btrfs_path *path; | |
1391 | struct btrfs_key location; | |
1392 | u64 dir_id; | |
1393 | ||
73f73415 JB |
1394 | path = btrfs_alloc_path(); |
1395 | if (!path) | |
05dbe683 | 1396 | return -ENOMEM; |
73f73415 JB |
1397 | |
1398 | /* | |
1399 | * Find the "default" dir item which points to the root item that we | |
1400 | * will mount by default if we haven't been given a specific subvolume | |
1401 | * to mount. | |
1402 | */ | |
815745cf | 1403 | dir_id = btrfs_super_root_dir(fs_info->super_copy); |
73f73415 | 1404 | di = btrfs_lookup_dir_item(NULL, root, path, dir_id, "default", 7, 0); |
b0839166 JL |
1405 | if (IS_ERR(di)) { |
1406 | btrfs_free_path(path); | |
05dbe683 | 1407 | return PTR_ERR(di); |
b0839166 | 1408 | } |
73f73415 JB |
1409 | if (!di) { |
1410 | /* | |
1411 | * Ok the default dir item isn't there. This is weird since | |
1412 | * it's always been there, but don't freak out, just try and | |
05dbe683 | 1413 | * mount the top-level subvolume. |
73f73415 JB |
1414 | */ |
1415 | btrfs_free_path(path); | |
05dbe683 OS |
1416 | *objectid = BTRFS_FS_TREE_OBJECTID; |
1417 | return 0; | |
73f73415 JB |
1418 | } |
1419 | ||
1420 | btrfs_dir_item_key_to_cpu(path->nodes[0], di, &location); | |
1421 | btrfs_free_path(path); | |
05dbe683 OS |
1422 | *objectid = location.objectid; |
1423 | return 0; | |
73f73415 JB |
1424 | } |
1425 | ||
d397712b | 1426 | static int btrfs_fill_super(struct super_block *sb, |
8a4b83cc | 1427 | struct btrfs_fs_devices *fs_devices, |
56e033a7 | 1428 | void *data) |
75dfe396 | 1429 | { |
d397712b | 1430 | struct inode *inode; |
815745cf | 1431 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
39279cc3 | 1432 | int err; |
a429e513 | 1433 | |
39279cc3 CM |
1434 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1435 | sb->s_magic = BTRFS_SUPER_MAGIC; | |
1436 | sb->s_op = &btrfs_super_ops; | |
af53d29a | 1437 | sb->s_d_op = &btrfs_dentry_operations; |
be6e8dc0 | 1438 | sb->s_export_op = &btrfs_export_ops; |
14605409 BB |
1439 | #ifdef CONFIG_FS_VERITY |
1440 | sb->s_vop = &btrfs_verityops; | |
1441 | #endif | |
5103e947 | 1442 | sb->s_xattr = btrfs_xattr_handlers; |
39279cc3 | 1443 | sb->s_time_gran = 1; |
0eda294d | 1444 | #ifdef CONFIG_BTRFS_FS_POSIX_ACL |
1751e8a6 | 1445 | sb->s_flags |= SB_POSIXACL; |
49cf6f45 | 1446 | #endif |
357fdad0 | 1447 | sb->s_flags |= SB_I_VERSION; |
da2f0f74 | 1448 | sb->s_iflags |= SB_I_CGROUPWB; |
9e11ceee JK |
1449 | |
1450 | err = super_setup_bdi(sb); | |
1451 | if (err) { | |
1452 | btrfs_err(fs_info, "super_setup_bdi failed"); | |
1453 | return err; | |
1454 | } | |
1455 | ||
ad2b2c80 AV |
1456 | err = open_ctree(sb, fs_devices, (char *)data); |
1457 | if (err) { | |
ab8d0fc4 | 1458 | btrfs_err(fs_info, "open_ctree failed"); |
ad2b2c80 | 1459 | return err; |
a429e513 CM |
1460 | } |
1461 | ||
0202e83f | 1462 | inode = btrfs_iget(sb, BTRFS_FIRST_FREE_OBJECTID, fs_info->fs_root); |
5d4f98a2 YZ |
1463 | if (IS_ERR(inode)) { |
1464 | err = PTR_ERR(inode); | |
39279cc3 | 1465 | goto fail_close; |
f254e52c | 1466 | } |
f254e52c | 1467 | |
48fde701 AV |
1468 | sb->s_root = d_make_root(inode); |
1469 | if (!sb->s_root) { | |
39279cc3 CM |
1470 | err = -ENOMEM; |
1471 | goto fail_close; | |
f254e52c | 1472 | } |
58176a96 | 1473 | |
1751e8a6 | 1474 | sb->s_flags |= SB_ACTIVE; |
2619ba1f | 1475 | return 0; |
39279cc3 CM |
1476 | |
1477 | fail_close: | |
6bccf3ab | 1478 | close_ctree(fs_info); |
39279cc3 | 1479 | return err; |
2619ba1f CM |
1480 | } |
1481 | ||
6bf13c0c | 1482 | int btrfs_sync_fs(struct super_block *sb, int wait) |
c5739bba CM |
1483 | { |
1484 | struct btrfs_trans_handle *trans; | |
815745cf AV |
1485 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
1486 | struct btrfs_root *root = fs_info->tree_root; | |
2619ba1f | 1487 | |
bc074524 | 1488 | trace_btrfs_sync_fs(fs_info, wait); |
1abe9b8a | 1489 | |
39279cc3 | 1490 | if (!wait) { |
815745cf | 1491 | filemap_flush(fs_info->btree_inode->i_mapping); |
39279cc3 CM |
1492 | return 0; |
1493 | } | |
771ed689 | 1494 | |
6374e57a | 1495 | btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1); |
771ed689 | 1496 | |
d4edf39b | 1497 | trans = btrfs_attach_transaction_barrier(root); |
60376ce4 | 1498 | if (IS_ERR(trans)) { |
354aa0fb | 1499 | /* no transaction, don't bother */ |
6b5fe46d DS |
1500 | if (PTR_ERR(trans) == -ENOENT) { |
1501 | /* | |
1502 | * Exit unless we have some pending changes | |
1503 | * that need to go through commit | |
1504 | */ | |
1505 | if (fs_info->pending_changes == 0) | |
1506 | return 0; | |
a53f4f8e QW |
1507 | /* |
1508 | * A non-blocking test if the fs is frozen. We must not | |
1509 | * start a new transaction here otherwise a deadlock | |
1510 | * happens. The pending operations are delayed to the | |
1511 | * next commit after thawing. | |
1512 | */ | |
a7e3c5f2 RP |
1513 | if (sb_start_write_trylock(sb)) |
1514 | sb_end_write(sb); | |
a53f4f8e QW |
1515 | else |
1516 | return 0; | |
6b5fe46d | 1517 | trans = btrfs_start_transaction(root, 0); |
6b5fe46d | 1518 | } |
98bd5c54 DS |
1519 | if (IS_ERR(trans)) |
1520 | return PTR_ERR(trans); | |
60376ce4 | 1521 | } |
3a45bb20 | 1522 | return btrfs_commit_transaction(trans); |
2c90e5d6 CM |
1523 | } |
1524 | ||
ab0b4a3e JB |
1525 | static void print_rescue_option(struct seq_file *seq, const char *s, bool *printed) |
1526 | { | |
1527 | seq_printf(seq, "%s%s", (*printed) ? ":" : ",rescue=", s); | |
1528 | *printed = true; | |
1529 | } | |
1530 | ||
34c80b1d | 1531 | static int btrfs_show_options(struct seq_file *seq, struct dentry *dentry) |
a9572a15 | 1532 | { |
815745cf | 1533 | struct btrfs_fs_info *info = btrfs_sb(dentry->d_sb); |
0f628c63 | 1534 | const char *compress_type; |
3ef3959b | 1535 | const char *subvol_name; |
ab0b4a3e | 1536 | bool printed = false; |
a9572a15 | 1537 | |
3cdde224 | 1538 | if (btrfs_test_opt(info, DEGRADED)) |
a9572a15 | 1539 | seq_puts(seq, ",degraded"); |
3cdde224 | 1540 | if (btrfs_test_opt(info, NODATASUM)) |
a9572a15 | 1541 | seq_puts(seq, ",nodatasum"); |
3cdde224 | 1542 | if (btrfs_test_opt(info, NODATACOW)) |
a9572a15 | 1543 | seq_puts(seq, ",nodatacow"); |
3cdde224 | 1544 | if (btrfs_test_opt(info, NOBARRIER)) |
a9572a15 | 1545 | seq_puts(seq, ",nobarrier"); |
95ac567a | 1546 | if (info->max_inline != BTRFS_DEFAULT_MAX_INLINE) |
c1c9ff7c | 1547 | seq_printf(seq, ",max_inline=%llu", info->max_inline); |
a9572a15 EP |
1548 | if (info->thread_pool_size != min_t(unsigned long, |
1549 | num_online_cpus() + 2, 8)) | |
f7b885be | 1550 | seq_printf(seq, ",thread_pool=%u", info->thread_pool_size); |
3cdde224 | 1551 | if (btrfs_test_opt(info, COMPRESS)) { |
0f628c63 | 1552 | compress_type = btrfs_compress_type2str(info->compress_type); |
3cdde224 | 1553 | if (btrfs_test_opt(info, FORCE_COMPRESS)) |
200da64e TI |
1554 | seq_printf(seq, ",compress-force=%s", compress_type); |
1555 | else | |
1556 | seq_printf(seq, ",compress=%s", compress_type); | |
f51d2b59 | 1557 | if (info->compress_level) |
fa4d885a | 1558 | seq_printf(seq, ":%d", info->compress_level); |
200da64e | 1559 | } |
3cdde224 | 1560 | if (btrfs_test_opt(info, NOSSD)) |
c289811c | 1561 | seq_puts(seq, ",nossd"); |
3cdde224 | 1562 | if (btrfs_test_opt(info, SSD_SPREAD)) |
451d7585 | 1563 | seq_puts(seq, ",ssd_spread"); |
3cdde224 | 1564 | else if (btrfs_test_opt(info, SSD)) |
a9572a15 | 1565 | seq_puts(seq, ",ssd"); |
3cdde224 | 1566 | if (btrfs_test_opt(info, NOTREELOG)) |
6b65c5c6 | 1567 | seq_puts(seq, ",notreelog"); |
3cdde224 | 1568 | if (btrfs_test_opt(info, NOLOGREPLAY)) |
ab0b4a3e | 1569 | print_rescue_option(seq, "nologreplay", &printed); |
68319c18 JB |
1570 | if (btrfs_test_opt(info, USEBACKUPROOT)) |
1571 | print_rescue_option(seq, "usebackuproot", &printed); | |
42437a63 JB |
1572 | if (btrfs_test_opt(info, IGNOREBADROOTS)) |
1573 | print_rescue_option(seq, "ignorebadroots", &printed); | |
882dbe0c JB |
1574 | if (btrfs_test_opt(info, IGNOREDATACSUMS)) |
1575 | print_rescue_option(seq, "ignoredatacsums", &printed); | |
3cdde224 | 1576 | if (btrfs_test_opt(info, FLUSHONCOMMIT)) |
6b65c5c6 | 1577 | seq_puts(seq, ",flushoncommit"); |
46b27f50 | 1578 | if (btrfs_test_opt(info, DISCARD_SYNC)) |
20a5239a | 1579 | seq_puts(seq, ",discard"); |
b0643e59 DZ |
1580 | if (btrfs_test_opt(info, DISCARD_ASYNC)) |
1581 | seq_puts(seq, ",discard=async"); | |
1751e8a6 | 1582 | if (!(info->sb->s_flags & SB_POSIXACL)) |
a9572a15 | 1583 | seq_puts(seq, ",noacl"); |
04c41559 | 1584 | if (btrfs_free_space_cache_v1_active(info)) |
200da64e | 1585 | seq_puts(seq, ",space_cache"); |
04c41559 | 1586 | else if (btrfs_fs_compat_ro(info, FREE_SPACE_TREE)) |
70f6d82e | 1587 | seq_puts(seq, ",space_cache=v2"); |
73bc1876 | 1588 | else |
8965593e | 1589 | seq_puts(seq, ",nospace_cache"); |
3cdde224 | 1590 | if (btrfs_test_opt(info, RESCAN_UUID_TREE)) |
f420ee1e | 1591 | seq_puts(seq, ",rescan_uuid_tree"); |
3cdde224 | 1592 | if (btrfs_test_opt(info, CLEAR_CACHE)) |
200da64e | 1593 | seq_puts(seq, ",clear_cache"); |
3cdde224 | 1594 | if (btrfs_test_opt(info, USER_SUBVOL_RM_ALLOWED)) |
200da64e | 1595 | seq_puts(seq, ",user_subvol_rm_allowed"); |
3cdde224 | 1596 | if (btrfs_test_opt(info, ENOSPC_DEBUG)) |
0942caa3 | 1597 | seq_puts(seq, ",enospc_debug"); |
3cdde224 | 1598 | if (btrfs_test_opt(info, AUTO_DEFRAG)) |
0942caa3 | 1599 | seq_puts(seq, ",autodefrag"); |
3cdde224 | 1600 | if (btrfs_test_opt(info, SKIP_BALANCE)) |
9555c6c1 | 1601 | seq_puts(seq, ",skip_balance"); |
8507d216 | 1602 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
cbeaae4f | 1603 | if (btrfs_test_opt(info, CHECK_INTEGRITY_DATA)) |
8507d216 | 1604 | seq_puts(seq, ",check_int_data"); |
3cdde224 | 1605 | else if (btrfs_test_opt(info, CHECK_INTEGRITY)) |
8507d216 WS |
1606 | seq_puts(seq, ",check_int"); |
1607 | if (info->check_integrity_print_mask) | |
1608 | seq_printf(seq, ",check_int_print_mask=%d", | |
1609 | info->check_integrity_print_mask); | |
1610 | #endif | |
1611 | if (info->metadata_ratio) | |
764cb8b4 | 1612 | seq_printf(seq, ",metadata_ratio=%u", info->metadata_ratio); |
3cdde224 | 1613 | if (btrfs_test_opt(info, PANIC_ON_FATAL_ERROR)) |
8c342930 | 1614 | seq_puts(seq, ",fatal_errors=panic"); |
8b87dc17 | 1615 | if (info->commit_interval != BTRFS_DEFAULT_COMMIT_INTERVAL) |
d3740608 | 1616 | seq_printf(seq, ",commit=%u", info->commit_interval); |
d0bd4560 | 1617 | #ifdef CONFIG_BTRFS_DEBUG |
3cdde224 | 1618 | if (btrfs_test_opt(info, FRAGMENT_DATA)) |
d0bd4560 | 1619 | seq_puts(seq, ",fragment=data"); |
3cdde224 | 1620 | if (btrfs_test_opt(info, FRAGMENT_METADATA)) |
d0bd4560 JB |
1621 | seq_puts(seq, ",fragment=metadata"); |
1622 | #endif | |
fb592373 JB |
1623 | if (btrfs_test_opt(info, REF_VERIFY)) |
1624 | seq_puts(seq, ",ref_verify"); | |
c8d3fe02 OS |
1625 | seq_printf(seq, ",subvolid=%llu", |
1626 | BTRFS_I(d_inode(dentry))->root->root_key.objectid); | |
3ef3959b JB |
1627 | subvol_name = btrfs_get_subvol_name_from_objectid(info, |
1628 | BTRFS_I(d_inode(dentry))->root->root_key.objectid); | |
1629 | if (!IS_ERR(subvol_name)) { | |
1630 | seq_puts(seq, ",subvol="); | |
1631 | seq_escape(seq, subvol_name, " \t\n\\"); | |
1632 | kfree(subvol_name); | |
1633 | } | |
a9572a15 EP |
1634 | return 0; |
1635 | } | |
1636 | ||
a061fc8d | 1637 | static int btrfs_test_super(struct super_block *s, void *data) |
4b82d6e4 | 1638 | { |
815745cf AV |
1639 | struct btrfs_fs_info *p = data; |
1640 | struct btrfs_fs_info *fs_info = btrfs_sb(s); | |
4b82d6e4 | 1641 | |
815745cf | 1642 | return fs_info->fs_devices == p->fs_devices; |
4b82d6e4 Y |
1643 | } |
1644 | ||
450ba0ea JB |
1645 | static int btrfs_set_super(struct super_block *s, void *data) |
1646 | { | |
6de1d09d AV |
1647 | int err = set_anon_super(s, data); |
1648 | if (!err) | |
1649 | s->s_fs_info = data; | |
1650 | return err; | |
4b82d6e4 Y |
1651 | } |
1652 | ||
f9d9ef62 DS |
1653 | /* |
1654 | * subvolumes are identified by ino 256 | |
1655 | */ | |
1656 | static inline int is_subvolume_inode(struct inode *inode) | |
1657 | { | |
1658 | if (inode && inode->i_ino == BTRFS_FIRST_FREE_OBJECTID) | |
1659 | return 1; | |
1660 | return 0; | |
1661 | } | |
1662 | ||
bb289b7b | 1663 | static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid, |
ae0bc863 | 1664 | struct vfsmount *mnt) |
830c4adb | 1665 | { |
830c4adb | 1666 | struct dentry *root; |
fa330659 | 1667 | int ret; |
830c4adb | 1668 | |
05dbe683 OS |
1669 | if (!subvol_name) { |
1670 | if (!subvol_objectid) { | |
1671 | ret = get_default_subvol_objectid(btrfs_sb(mnt->mnt_sb), | |
1672 | &subvol_objectid); | |
1673 | if (ret) { | |
1674 | root = ERR_PTR(ret); | |
1675 | goto out; | |
1676 | } | |
1677 | } | |
c0c907a4 MPS |
1678 | subvol_name = btrfs_get_subvol_name_from_objectid( |
1679 | btrfs_sb(mnt->mnt_sb), subvol_objectid); | |
05dbe683 OS |
1680 | if (IS_ERR(subvol_name)) { |
1681 | root = ERR_CAST(subvol_name); | |
1682 | subvol_name = NULL; | |
1683 | goto out; | |
1684 | } | |
1685 | ||
1686 | } | |
1687 | ||
ea441d11 | 1688 | root = mount_subtree(mnt, subvol_name); |
fa330659 OS |
1689 | /* mount_subtree() drops our reference on the vfsmount. */ |
1690 | mnt = NULL; | |
830c4adb | 1691 | |
bb289b7b | 1692 | if (!IS_ERR(root)) { |
ea441d11 | 1693 | struct super_block *s = root->d_sb; |
ab8d0fc4 | 1694 | struct btrfs_fs_info *fs_info = btrfs_sb(s); |
bb289b7b OS |
1695 | struct inode *root_inode = d_inode(root); |
1696 | u64 root_objectid = BTRFS_I(root_inode)->root->root_key.objectid; | |
1697 | ||
1698 | ret = 0; | |
1699 | if (!is_subvolume_inode(root_inode)) { | |
ab8d0fc4 | 1700 | btrfs_err(fs_info, "'%s' is not a valid subvolume", |
bb289b7b OS |
1701 | subvol_name); |
1702 | ret = -EINVAL; | |
1703 | } | |
1704 | if (subvol_objectid && root_objectid != subvol_objectid) { | |
05dbe683 OS |
1705 | /* |
1706 | * This will also catch a race condition where a | |
1707 | * subvolume which was passed by ID is renamed and | |
1708 | * another subvolume is renamed over the old location. | |
1709 | */ | |
ab8d0fc4 JM |
1710 | btrfs_err(fs_info, |
1711 | "subvol '%s' does not match subvolid %llu", | |
1712 | subvol_name, subvol_objectid); | |
bb289b7b OS |
1713 | ret = -EINVAL; |
1714 | } | |
1715 | if (ret) { | |
1716 | dput(root); | |
1717 | root = ERR_PTR(ret); | |
1718 | deactivate_locked_super(s); | |
1719 | } | |
f9d9ef62 DS |
1720 | } |
1721 | ||
fa330659 OS |
1722 | out: |
1723 | mntput(mnt); | |
fa330659 | 1724 | kfree(subvol_name); |
830c4adb JB |
1725 | return root; |
1726 | } | |
450ba0ea | 1727 | |
312c89fb MT |
1728 | /* |
1729 | * Find a superblock for the given device / mount point. | |
1730 | * | |
1731 | * Note: This is based on mount_bdev from fs/super.c with a few additions | |
1732 | * for multiple device setup. Make sure to keep it in sync. | |
1733 | */ | |
72fa39f5 MT |
1734 | static struct dentry *btrfs_mount_root(struct file_system_type *fs_type, |
1735 | int flags, const char *device_name, void *data) | |
1736 | { | |
1737 | struct block_device *bdev = NULL; | |
1738 | struct super_block *s; | |
36350e95 | 1739 | struct btrfs_device *device = NULL; |
72fa39f5 MT |
1740 | struct btrfs_fs_devices *fs_devices = NULL; |
1741 | struct btrfs_fs_info *fs_info = NULL; | |
204cc0cc | 1742 | void *new_sec_opts = NULL; |
72fa39f5 | 1743 | fmode_t mode = FMODE_READ; |
72fa39f5 MT |
1744 | int error = 0; |
1745 | ||
1746 | if (!(flags & SB_RDONLY)) | |
1747 | mode |= FMODE_WRITE; | |
1748 | ||
72fa39f5 | 1749 | if (data) { |
a65001e8 | 1750 | error = security_sb_eat_lsm_opts(data, &new_sec_opts); |
72fa39f5 MT |
1751 | if (error) |
1752 | return ERR_PTR(error); | |
1753 | } | |
1754 | ||
72fa39f5 MT |
1755 | /* |
1756 | * Setup a dummy root and fs_info for test/set super. This is because | |
1757 | * we don't actually fill this stuff out until open_ctree, but we need | |
8260edba JB |
1758 | * then open_ctree will properly initialize the file system specific |
1759 | * settings later. btrfs_init_fs_info initializes the static elements | |
1760 | * of the fs_info (locks and such) to make cleanup easier if we find a | |
1761 | * superblock with our given fs_devices later on at sget() time. | |
72fa39f5 | 1762 | */ |
a8fd1f71 | 1763 | fs_info = kvzalloc(sizeof(struct btrfs_fs_info), GFP_KERNEL); |
72fa39f5 MT |
1764 | if (!fs_info) { |
1765 | error = -ENOMEM; | |
1766 | goto error_sec_opts; | |
1767 | } | |
8260edba | 1768 | btrfs_init_fs_info(fs_info); |
72fa39f5 | 1769 | |
72fa39f5 MT |
1770 | fs_info->super_copy = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL); |
1771 | fs_info->super_for_commit = kzalloc(BTRFS_SUPER_INFO_SIZE, GFP_KERNEL); | |
72fa39f5 MT |
1772 | if (!fs_info->super_copy || !fs_info->super_for_commit) { |
1773 | error = -ENOMEM; | |
1774 | goto error_fs_info; | |
1775 | } | |
1776 | ||
399f7f4c | 1777 | mutex_lock(&uuid_mutex); |
fa59f27c | 1778 | error = btrfs_parse_device_options(data, mode, fs_type); |
81ffd56b DS |
1779 | if (error) { |
1780 | mutex_unlock(&uuid_mutex); | |
399f7f4c | 1781 | goto error_fs_info; |
81ffd56b | 1782 | } |
399f7f4c | 1783 | |
36350e95 GJ |
1784 | device = btrfs_scan_one_device(device_name, mode, fs_type); |
1785 | if (IS_ERR(device)) { | |
81ffd56b | 1786 | mutex_unlock(&uuid_mutex); |
36350e95 | 1787 | error = PTR_ERR(device); |
399f7f4c | 1788 | goto error_fs_info; |
81ffd56b | 1789 | } |
399f7f4c | 1790 | |
36350e95 | 1791 | fs_devices = device->fs_devices; |
399f7f4c DS |
1792 | fs_info->fs_devices = fs_devices; |
1793 | ||
72fa39f5 | 1794 | error = btrfs_open_devices(fs_devices, mode, fs_type); |
f5194e34 | 1795 | mutex_unlock(&uuid_mutex); |
72fa39f5 MT |
1796 | if (error) |
1797 | goto error_fs_info; | |
1798 | ||
1799 | if (!(flags & SB_RDONLY) && fs_devices->rw_devices == 0) { | |
1800 | error = -EACCES; | |
1801 | goto error_close_devices; | |
1802 | } | |
1803 | ||
d24fa5c1 | 1804 | bdev = fs_devices->latest_dev->bdev; |
72fa39f5 MT |
1805 | s = sget(fs_type, btrfs_test_super, btrfs_set_super, flags | SB_NOSEC, |
1806 | fs_info); | |
1807 | if (IS_ERR(s)) { | |
1808 | error = PTR_ERR(s); | |
1809 | goto error_close_devices; | |
1810 | } | |
1811 | ||
1812 | if (s->s_root) { | |
1813 | btrfs_close_devices(fs_devices); | |
0d4b0463 | 1814 | btrfs_free_fs_info(fs_info); |
72fa39f5 MT |
1815 | if ((flags ^ s->s_flags) & SB_RDONLY) |
1816 | error = -EBUSY; | |
1817 | } else { | |
1818 | snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); | |
e33c267a RG |
1819 | shrinker_debugfs_rename(&s->s_shrink, "sb-%s:%s", fs_type->name, |
1820 | s->s_id); | |
72fa39f5 | 1821 | btrfs_sb(s)->bdev_holder = fs_type; |
9b4e675a DS |
1822 | if (!strstr(crc32c_impl(), "generic")) |
1823 | set_bit(BTRFS_FS_CSUM_IMPL_FAST, &fs_info->flags); | |
72fa39f5 MT |
1824 | error = btrfs_fill_super(s, fs_devices, data); |
1825 | } | |
a65001e8 | 1826 | if (!error) |
204cc0cc | 1827 | error = security_sb_set_mnt_opts(s, new_sec_opts, 0, NULL); |
a65001e8 | 1828 | security_free_mnt_opts(&new_sec_opts); |
72fa39f5 MT |
1829 | if (error) { |
1830 | deactivate_locked_super(s); | |
a65001e8 | 1831 | return ERR_PTR(error); |
72fa39f5 MT |
1832 | } |
1833 | ||
1834 | return dget(s->s_root); | |
1835 | ||
1836 | error_close_devices: | |
1837 | btrfs_close_devices(fs_devices); | |
1838 | error_fs_info: | |
0d4b0463 | 1839 | btrfs_free_fs_info(fs_info); |
72fa39f5 MT |
1840 | error_sec_opts: |
1841 | security_free_mnt_opts(&new_sec_opts); | |
1842 | return ERR_PTR(error); | |
1843 | } | |
312c89fb | 1844 | |
edf24abe | 1845 | /* |
312c89fb | 1846 | * Mount function which is called by VFS layer. |
edf24abe | 1847 | * |
312c89fb MT |
1848 | * In order to allow mounting a subvolume directly, btrfs uses mount_subtree() |
1849 | * which needs vfsmount* of device's root (/). This means device's root has to | |
1850 | * be mounted internally in any case. | |
1851 | * | |
1852 | * Operation flow: | |
1853 | * 1. Parse subvol id related options for later use in mount_subvol(). | |
1854 | * | |
1855 | * 2. Mount device's root (/) by calling vfs_kern_mount(). | |
1856 | * | |
1857 | * NOTE: vfs_kern_mount() is used by VFS to call btrfs_mount() in the | |
1858 | * first place. In order to avoid calling btrfs_mount() again, we use | |
1859 | * different file_system_type which is not registered to VFS by | |
1860 | * register_filesystem() (btrfs_root_fs_type). As a result, | |
1861 | * btrfs_mount_root() is called. The return value will be used by | |
1862 | * mount_subtree() in mount_subvol(). | |
1863 | * | |
1864 | * 3. Call mount_subvol() to get the dentry of subvolume. Since there is | |
1865 | * "btrfs subvolume set-default", mount_subvol() is called always. | |
edf24abe | 1866 | */ |
061dbc6b | 1867 | static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags, |
306e16ce | 1868 | const char *device_name, void *data) |
4b82d6e4 | 1869 | { |
312c89fb MT |
1870 | struct vfsmount *mnt_root; |
1871 | struct dentry *root; | |
73f73415 JB |
1872 | char *subvol_name = NULL; |
1873 | u64 subvol_objectid = 0; | |
4b82d6e4 Y |
1874 | int error = 0; |
1875 | ||
93b9bcdf GJ |
1876 | error = btrfs_parse_subvol_options(data, &subvol_name, |
1877 | &subvol_objectid); | |
f23c8af8 ID |
1878 | if (error) { |
1879 | kfree(subvol_name); | |
061dbc6b | 1880 | return ERR_PTR(error); |
f23c8af8 | 1881 | } |
edf24abe | 1882 | |
312c89fb MT |
1883 | /* mount device's root (/) */ |
1884 | mnt_root = vfs_kern_mount(&btrfs_root_fs_type, flags, device_name, data); | |
1885 | if (PTR_ERR_OR_ZERO(mnt_root) == -EBUSY) { | |
1886 | if (flags & SB_RDONLY) { | |
1887 | mnt_root = vfs_kern_mount(&btrfs_root_fs_type, | |
1888 | flags & ~SB_RDONLY, device_name, data); | |
1889 | } else { | |
1890 | mnt_root = vfs_kern_mount(&btrfs_root_fs_type, | |
1891 | flags | SB_RDONLY, device_name, data); | |
1892 | if (IS_ERR(mnt_root)) { | |
1893 | root = ERR_CAST(mnt_root); | |
532b618b | 1894 | kfree(subvol_name); |
312c89fb MT |
1895 | goto out; |
1896 | } | |
4b82d6e4 | 1897 | |
312c89fb MT |
1898 | down_write(&mnt_root->mnt_sb->s_umount); |
1899 | error = btrfs_remount(mnt_root->mnt_sb, &flags, NULL); | |
1900 | up_write(&mnt_root->mnt_sb->s_umount); | |
1901 | if (error < 0) { | |
1902 | root = ERR_PTR(error); | |
1903 | mntput(mnt_root); | |
532b618b | 1904 | kfree(subvol_name); |
312c89fb MT |
1905 | goto out; |
1906 | } | |
1907 | } | |
f667aef6 | 1908 | } |
312c89fb MT |
1909 | if (IS_ERR(mnt_root)) { |
1910 | root = ERR_CAST(mnt_root); | |
532b618b | 1911 | kfree(subvol_name); |
312c89fb | 1912 | goto out; |
f667aef6 | 1913 | } |
4b82d6e4 | 1914 | |
312c89fb | 1915 | /* mount_subvol() will free subvol_name and mnt_root */ |
ae0bc863 | 1916 | root = mount_subvol(subvol_name, subvol_objectid, mnt_root); |
4b82d6e4 | 1917 | |
312c89fb MT |
1918 | out: |
1919 | return root; | |
4b82d6e4 | 1920 | } |
2e635a27 | 1921 | |
0d2450ab | 1922 | static void btrfs_resize_thread_pool(struct btrfs_fs_info *fs_info, |
f7b885be | 1923 | u32 new_pool_size, u32 old_pool_size) |
0d2450ab ST |
1924 | { |
1925 | if (new_pool_size == old_pool_size) | |
1926 | return; | |
1927 | ||
1928 | fs_info->thread_pool_size = new_pool_size; | |
1929 | ||
efe120a0 | 1930 | btrfs_info(fs_info, "resize thread pool %d -> %d", |
0d2450ab ST |
1931 | old_pool_size, new_pool_size); |
1932 | ||
5cdc7ad3 | 1933 | btrfs_workqueue_set_max(fs_info->workers, new_pool_size); |
a31b4a43 | 1934 | btrfs_workqueue_set_max(fs_info->hipri_workers, new_pool_size); |
afe3d242 | 1935 | btrfs_workqueue_set_max(fs_info->delalloc_workers, new_pool_size); |
e66f0bb1 | 1936 | btrfs_workqueue_set_max(fs_info->caching_workers, new_pool_size); |
fccb5d86 QW |
1937 | btrfs_workqueue_set_max(fs_info->endio_write_workers, new_pool_size); |
1938 | btrfs_workqueue_set_max(fs_info->endio_freespace_worker, new_pool_size); | |
5b3bc44e | 1939 | btrfs_workqueue_set_max(fs_info->delayed_workers, new_pool_size); |
0d2450ab ST |
1940 | } |
1941 | ||
f42a34b2 MX |
1942 | static inline void btrfs_remount_begin(struct btrfs_fs_info *fs_info, |
1943 | unsigned long old_opts, int flags) | |
1944 | { | |
dc81cdc5 MX |
1945 | if (btrfs_raw_test_opt(old_opts, AUTO_DEFRAG) && |
1946 | (!btrfs_raw_test_opt(fs_info->mount_opt, AUTO_DEFRAG) || | |
1751e8a6 | 1947 | (flags & SB_RDONLY))) { |
dc81cdc5 MX |
1948 | /* wait for any defraggers to finish */ |
1949 | wait_event(fs_info->transaction_wait, | |
1950 | (atomic_read(&fs_info->defrag_running) == 0)); | |
1751e8a6 | 1951 | if (flags & SB_RDONLY) |
dc81cdc5 MX |
1952 | sync_filesystem(fs_info->sb); |
1953 | } | |
1954 | } | |
1955 | ||
1956 | static inline void btrfs_remount_cleanup(struct btrfs_fs_info *fs_info, | |
1957 | unsigned long old_opts) | |
1958 | { | |
94846229 BB |
1959 | const bool cache_opt = btrfs_test_opt(fs_info, SPACE_CACHE); |
1960 | ||
dc81cdc5 | 1961 | /* |
180e4d47 LB |
1962 | * We need to cleanup all defragable inodes if the autodefragment is |
1963 | * close or the filesystem is read only. | |
dc81cdc5 MX |
1964 | */ |
1965 | if (btrfs_raw_test_opt(old_opts, AUTO_DEFRAG) && | |
bc98a42c | 1966 | (!btrfs_raw_test_opt(fs_info->mount_opt, AUTO_DEFRAG) || sb_rdonly(fs_info->sb))) { |
dc81cdc5 MX |
1967 | btrfs_cleanup_defrag_inodes(fs_info); |
1968 | } | |
1969 | ||
b0643e59 DZ |
1970 | /* If we toggled discard async */ |
1971 | if (!btrfs_raw_test_opt(old_opts, DISCARD_ASYNC) && | |
1972 | btrfs_test_opt(fs_info, DISCARD_ASYNC)) | |
1973 | btrfs_discard_resume(fs_info); | |
1974 | else if (btrfs_raw_test_opt(old_opts, DISCARD_ASYNC) && | |
1975 | !btrfs_test_opt(fs_info, DISCARD_ASYNC)) | |
1976 | btrfs_discard_cleanup(fs_info); | |
94846229 BB |
1977 | |
1978 | /* If we toggled space cache */ | |
1979 | if (cache_opt != btrfs_free_space_cache_v1_active(fs_info)) | |
1980 | btrfs_set_free_space_cache_v1_active(fs_info, cache_opt); | |
dc81cdc5 MX |
1981 | } |
1982 | ||
c146afad YZ |
1983 | static int btrfs_remount(struct super_block *sb, int *flags, char *data) |
1984 | { | |
815745cf | 1985 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
49b25e05 JM |
1986 | unsigned old_flags = sb->s_flags; |
1987 | unsigned long old_opts = fs_info->mount_opt; | |
1988 | unsigned long old_compress_type = fs_info->compress_type; | |
1989 | u64 old_max_inline = fs_info->max_inline; | |
f7b885be | 1990 | u32 old_thread_pool_size = fs_info->thread_pool_size; |
d612ac59 | 1991 | u32 old_metadata_ratio = fs_info->metadata_ratio; |
c146afad YZ |
1992 | int ret; |
1993 | ||
02b9984d | 1994 | sync_filesystem(sb); |
88c4703f | 1995 | set_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state); |
dc81cdc5 | 1996 | |
f667aef6 | 1997 | if (data) { |
204cc0cc | 1998 | void *new_sec_opts = NULL; |
f667aef6 | 1999 | |
a65001e8 AV |
2000 | ret = security_sb_eat_lsm_opts(data, &new_sec_opts); |
2001 | if (!ret) | |
204cc0cc | 2002 | ret = security_sb_remount(sb, new_sec_opts); |
a65001e8 | 2003 | security_free_mnt_opts(&new_sec_opts); |
f667aef6 QW |
2004 | if (ret) |
2005 | goto restore; | |
f667aef6 QW |
2006 | } |
2007 | ||
2ff7e61e | 2008 | ret = btrfs_parse_options(fs_info, data, *flags); |
891f41cb | 2009 | if (ret) |
49b25e05 | 2010 | goto restore; |
b288052e | 2011 | |
0591f040 QW |
2012 | /* V1 cache is not supported for subpage mount. */ |
2013 | if (fs_info->sectorsize < PAGE_SIZE && btrfs_test_opt(fs_info, SPACE_CACHE)) { | |
2014 | btrfs_warn(fs_info, | |
2015 | "v1 space cache is not supported for page size %lu with sectorsize %u", | |
2016 | PAGE_SIZE, fs_info->sectorsize); | |
2017 | ret = -EINVAL; | |
2018 | goto restore; | |
2019 | } | |
f42a34b2 | 2020 | btrfs_remount_begin(fs_info, old_opts, *flags); |
0d2450ab ST |
2021 | btrfs_resize_thread_pool(fs_info, |
2022 | fs_info->thread_pool_size, old_thread_pool_size); | |
2023 | ||
c55a4319 BB |
2024 | if ((bool)btrfs_test_opt(fs_info, FREE_SPACE_TREE) != |
2025 | (bool)btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE) && | |
2838d255 BB |
2026 | (!sb_rdonly(sb) || (*flags & SB_RDONLY))) { |
2027 | btrfs_warn(fs_info, | |
2028 | "remount supports changing free space tree only from ro to rw"); | |
2029 | /* Make sure free space cache options match the state on disk */ | |
2030 | if (btrfs_fs_compat_ro(fs_info, FREE_SPACE_TREE)) { | |
2031 | btrfs_set_opt(fs_info->mount_opt, FREE_SPACE_TREE); | |
2032 | btrfs_clear_opt(fs_info->mount_opt, SPACE_CACHE); | |
2033 | } | |
2034 | if (btrfs_free_space_cache_v1_active(fs_info)) { | |
2035 | btrfs_clear_opt(fs_info->mount_opt, FREE_SPACE_TREE); | |
2036 | btrfs_set_opt(fs_info->mount_opt, SPACE_CACHE); | |
2037 | } | |
2038 | } | |
2039 | ||
1751e8a6 | 2040 | if ((bool)(*flags & SB_RDONLY) == sb_rdonly(sb)) |
dc81cdc5 | 2041 | goto out; |
c146afad | 2042 | |
1751e8a6 | 2043 | if (*flags & SB_RDONLY) { |
8dabb742 SB |
2044 | /* |
2045 | * this also happens on 'umount -rf' or on shutdown, when | |
2046 | * the filesystem is busy. | |
2047 | */ | |
21c7e756 | 2048 | cancel_work_sync(&fs_info->async_reclaim_work); |
57056740 | 2049 | cancel_work_sync(&fs_info->async_data_reclaim_work); |
361c093d | 2050 | |
b0643e59 DZ |
2051 | btrfs_discard_cleanup(fs_info); |
2052 | ||
361c093d SB |
2053 | /* wait for the uuid_scan task to finish */ |
2054 | down(&fs_info->uuid_tree_rescan_sem); | |
2055 | /* avoid complains from lockdep et al. */ | |
2056 | up(&fs_info->uuid_tree_rescan_sem); | |
2057 | ||
a0a1db70 | 2058 | btrfs_set_sb_rdonly(sb); |
c146afad | 2059 | |
e44163e1 | 2060 | /* |
1751e8a6 | 2061 | * Setting SB_RDONLY will put the cleaner thread to |
e44163e1 JM |
2062 | * sleep at the next loop if it's already active. |
2063 | * If it's already asleep, we'll leave unused block | |
2064 | * groups on disk until we're mounted read-write again | |
2065 | * unless we clean them up here. | |
2066 | */ | |
e44163e1 | 2067 | btrfs_delete_unused_bgs(fs_info); |
e44163e1 | 2068 | |
a0a1db70 FM |
2069 | /* |
2070 | * The cleaner task could be already running before we set the | |
2071 | * flag BTRFS_FS_STATE_RO (and SB_RDONLY in the superblock). | |
2072 | * We must make sure that after we finish the remount, i.e. after | |
2073 | * we call btrfs_commit_super(), the cleaner can no longer start | |
2074 | * a transaction - either because it was dropping a dead root, | |
2075 | * running delayed iputs or deleting an unused block group (the | |
2076 | * cleaner picked a block group from the list of unused block | |
2077 | * groups before we were able to in the previous call to | |
2078 | * btrfs_delete_unused_bgs()). | |
2079 | */ | |
2080 | wait_on_bit(&fs_info->flags, BTRFS_FS_CLEANER_RUNNING, | |
2081 | TASK_UNINTERRUPTIBLE); | |
2082 | ||
a8cc263e FM |
2083 | /* |
2084 | * We've set the superblock to RO mode, so we might have made | |
2085 | * the cleaner task sleep without running all pending delayed | |
2086 | * iputs. Go through all the delayed iputs here, so that if an | |
2087 | * unmount happens without remounting RW we don't end up at | |
2088 | * finishing close_ctree() with a non-empty list of delayed | |
2089 | * iputs. | |
2090 | */ | |
2091 | btrfs_run_delayed_iputs(fs_info); | |
2092 | ||
8dabb742 SB |
2093 | btrfs_dev_replace_suspend_for_unmount(fs_info); |
2094 | btrfs_scrub_cancel(fs_info); | |
061594ef | 2095 | btrfs_pause_balance(fs_info); |
8dabb742 | 2096 | |
cb13eea3 FM |
2097 | /* |
2098 | * Pause the qgroup rescan worker if it is running. We don't want | |
2099 | * it to be still running after we are in RO mode, as after that, | |
2100 | * by the time we unmount, it might have left a transaction open, | |
2101 | * so we would leak the transaction and/or crash. | |
2102 | */ | |
2103 | btrfs_qgroup_wait_for_completion(fs_info, false); | |
2104 | ||
6bccf3ab | 2105 | ret = btrfs_commit_super(fs_info); |
49b25e05 JM |
2106 | if (ret) |
2107 | goto restore; | |
c146afad | 2108 | } else { |
84961539 | 2109 | if (BTRFS_FS_ERROR(fs_info)) { |
6ef3de9c | 2110 | btrfs_err(fs_info, |
efe120a0 | 2111 | "Remounting read-write after error is not allowed"); |
6ef3de9c DS |
2112 | ret = -EINVAL; |
2113 | goto restore; | |
2114 | } | |
8a3db184 | 2115 | if (fs_info->fs_devices->rw_devices == 0) { |
49b25e05 JM |
2116 | ret = -EACCES; |
2117 | goto restore; | |
8a3db184 | 2118 | } |
2b82032c | 2119 | |
6528b99d | 2120 | if (!btrfs_check_rw_degradable(fs_info, NULL)) { |
efe120a0 | 2121 | btrfs_warn(fs_info, |
52042d8e | 2122 | "too many missing devices, writable remount is not allowed"); |
292fd7fc SB |
2123 | ret = -EACCES; |
2124 | goto restore; | |
2125 | } | |
2126 | ||
8a3db184 | 2127 | if (btrfs_super_log_root(fs_info->super_copy) != 0) { |
10a3a3ed DS |
2128 | btrfs_warn(fs_info, |
2129 | "mount required to replay tree-log, cannot remount read-write"); | |
49b25e05 JM |
2130 | ret = -EINVAL; |
2131 | goto restore; | |
8a3db184 | 2132 | } |
c146afad | 2133 | |
44c0ca21 BB |
2134 | /* |
2135 | * NOTE: when remounting with a change that does writes, don't | |
2136 | * put it anywhere above this point, as we are not sure to be | |
2137 | * safe to write until we pass the above checks. | |
2138 | */ | |
2139 | ret = btrfs_start_pre_rw_mount(fs_info); | |
2b6ba629 ID |
2140 | if (ret) |
2141 | goto restore; | |
2142 | ||
a0a1db70 | 2143 | btrfs_clear_sb_rdonly(sb); |
90c711ab | 2144 | |
afcdd129 | 2145 | set_bit(BTRFS_FS_OPEN, &fs_info->flags); |
c146afad | 2146 | } |
dc81cdc5 | 2147 | out: |
faa00889 JB |
2148 | /* |
2149 | * We need to set SB_I_VERSION here otherwise it'll get cleared by VFS, | |
2150 | * since the absence of the flag means it can be toggled off by remount. | |
2151 | */ | |
2152 | *flags |= SB_I_VERSION; | |
2153 | ||
2c6a92b0 | 2154 | wake_up_process(fs_info->transaction_kthread); |
dc81cdc5 | 2155 | btrfs_remount_cleanup(fs_info, old_opts); |
8cd29088 | 2156 | btrfs_clear_oneshot_options(fs_info); |
88c4703f JT |
2157 | clear_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state); |
2158 | ||
c146afad | 2159 | return 0; |
49b25e05 JM |
2160 | |
2161 | restore: | |
1751e8a6 | 2162 | /* We've hit an error - don't reset SB_RDONLY */ |
bc98a42c | 2163 | if (sb_rdonly(sb)) |
1751e8a6 | 2164 | old_flags |= SB_RDONLY; |
a0a1db70 FM |
2165 | if (!(old_flags & SB_RDONLY)) |
2166 | clear_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state); | |
49b25e05 JM |
2167 | sb->s_flags = old_flags; |
2168 | fs_info->mount_opt = old_opts; | |
2169 | fs_info->compress_type = old_compress_type; | |
2170 | fs_info->max_inline = old_max_inline; | |
0d2450ab ST |
2171 | btrfs_resize_thread_pool(fs_info, |
2172 | old_thread_pool_size, fs_info->thread_pool_size); | |
49b25e05 | 2173 | fs_info->metadata_ratio = old_metadata_ratio; |
dc81cdc5 | 2174 | btrfs_remount_cleanup(fs_info, old_opts); |
88c4703f JT |
2175 | clear_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state); |
2176 | ||
49b25e05 | 2177 | return ret; |
c146afad YZ |
2178 | } |
2179 | ||
bcd53741 | 2180 | /* Used to sort the devices by max_avail(descending sort) */ |
214cc184 | 2181 | static int btrfs_cmp_device_free_bytes(const void *a, const void *b) |
bcd53741 | 2182 | { |
214cc184 DS |
2183 | const struct btrfs_device_info *dev_info1 = a; |
2184 | const struct btrfs_device_info *dev_info2 = b; | |
2185 | ||
2186 | if (dev_info1->max_avail > dev_info2->max_avail) | |
bcd53741 | 2187 | return -1; |
214cc184 | 2188 | else if (dev_info1->max_avail < dev_info2->max_avail) |
bcd53741 | 2189 | return 1; |
bcd53741 AJ |
2190 | return 0; |
2191 | } | |
2192 | ||
2193 | /* | |
2194 | * sort the devices by max_avail, in which max free extent size of each device | |
2195 | * is stored.(Descending Sort) | |
2196 | */ | |
2197 | static inline void btrfs_descending_sort_devices( | |
2198 | struct btrfs_device_info *devices, | |
2199 | size_t nr_devices) | |
2200 | { | |
2201 | sort(devices, nr_devices, sizeof(struct btrfs_device_info), | |
2202 | btrfs_cmp_device_free_bytes, NULL); | |
2203 | } | |
2204 | ||
6d07bcec MX |
2205 | /* |
2206 | * The helper to calc the free space on the devices that can be used to store | |
2207 | * file data. | |
2208 | */ | |
7e17916b AB |
2209 | static inline int btrfs_calc_avail_data_space(struct btrfs_fs_info *fs_info, |
2210 | u64 *free_bytes) | |
6d07bcec | 2211 | { |
6d07bcec MX |
2212 | struct btrfs_device_info *devices_info; |
2213 | struct btrfs_fs_devices *fs_devices = fs_info->fs_devices; | |
2214 | struct btrfs_device *device; | |
6d07bcec MX |
2215 | u64 type; |
2216 | u64 avail_space; | |
6d07bcec | 2217 | u64 min_stripe_size; |
559ca6ea | 2218 | int num_stripes = 1; |
6d07bcec | 2219 | int i = 0, nr_devices; |
4f080f57 | 2220 | const struct btrfs_raid_attr *rattr; |
6d07bcec | 2221 | |
7e33fd99 | 2222 | /* |
01327610 | 2223 | * We aren't under the device list lock, so this is racy-ish, but good |
7e33fd99 JB |
2224 | * enough for our purposes. |
2225 | */ | |
b772a86e | 2226 | nr_devices = fs_info->fs_devices->open_devices; |
7e33fd99 JB |
2227 | if (!nr_devices) { |
2228 | smp_mb(); | |
2229 | nr_devices = fs_info->fs_devices->open_devices; | |
2230 | ASSERT(nr_devices); | |
2231 | if (!nr_devices) { | |
2232 | *free_bytes = 0; | |
2233 | return 0; | |
2234 | } | |
2235 | } | |
6d07bcec | 2236 | |
d9b0d9ba | 2237 | devices_info = kmalloc_array(nr_devices, sizeof(*devices_info), |
6a44517d | 2238 | GFP_KERNEL); |
6d07bcec MX |
2239 | if (!devices_info) |
2240 | return -ENOMEM; | |
2241 | ||
01327610 | 2242 | /* calc min stripe number for data space allocation */ |
1b86826d | 2243 | type = btrfs_data_alloc_profile(fs_info); |
4f080f57 DS |
2244 | rattr = &btrfs_raid_array[btrfs_bg_flags_to_raid_index(type)]; |
2245 | ||
e1ea2bee | 2246 | if (type & BTRFS_BLOCK_GROUP_RAID0) |
39fb26c3 | 2247 | num_stripes = nr_devices; |
d09cb9e1 DS |
2248 | else if (type & BTRFS_BLOCK_GROUP_RAID1_MASK) |
2249 | num_stripes = rattr->ncopies; | |
e1ea2bee | 2250 | else if (type & BTRFS_BLOCK_GROUP_RAID10) |
39fb26c3 | 2251 | num_stripes = 4; |
6d07bcec | 2252 | |
4f080f57 DS |
2253 | /* Adjust for more than 1 stripe per device */ |
2254 | min_stripe_size = rattr->dev_stripes * BTRFS_STRIPE_LEN; | |
6d07bcec | 2255 | |
7e33fd99 JB |
2256 | rcu_read_lock(); |
2257 | list_for_each_entry_rcu(device, &fs_devices->devices, dev_list) { | |
e12c9621 AJ |
2258 | if (!test_bit(BTRFS_DEV_STATE_IN_FS_METADATA, |
2259 | &device->dev_state) || | |
401e29c1 AJ |
2260 | !device->bdev || |
2261 | test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) | |
6d07bcec MX |
2262 | continue; |
2263 | ||
7e33fd99 JB |
2264 | if (i >= nr_devices) |
2265 | break; | |
2266 | ||
6d07bcec MX |
2267 | avail_space = device->total_bytes - device->bytes_used; |
2268 | ||
2269 | /* align with stripe_len */ | |
559ca6ea | 2270 | avail_space = rounddown(avail_space, BTRFS_STRIPE_LEN); |
6d07bcec MX |
2271 | |
2272 | /* | |
37f85ec3 QW |
2273 | * Ensure we have at least min_stripe_size on top of the |
2274 | * reserved space on the device. | |
6d07bcec | 2275 | */ |
37f85ec3 | 2276 | if (avail_space <= BTRFS_DEVICE_RANGE_RESERVED + min_stripe_size) |
6d07bcec MX |
2277 | continue; |
2278 | ||
37f85ec3 | 2279 | avail_space -= BTRFS_DEVICE_RANGE_RESERVED; |
559ca6ea | 2280 | |
6d07bcec MX |
2281 | devices_info[i].dev = device; |
2282 | devices_info[i].max_avail = avail_space; | |
2283 | ||
2284 | i++; | |
2285 | } | |
7e33fd99 | 2286 | rcu_read_unlock(); |
6d07bcec MX |
2287 | |
2288 | nr_devices = i; | |
2289 | ||
2290 | btrfs_descending_sort_devices(devices_info, nr_devices); | |
2291 | ||
2292 | i = nr_devices - 1; | |
2293 | avail_space = 0; | |
559ca6ea NB |
2294 | while (nr_devices >= rattr->devs_min) { |
2295 | num_stripes = min(num_stripes, nr_devices); | |
39fb26c3 | 2296 | |
6d07bcec MX |
2297 | if (devices_info[i].max_avail >= min_stripe_size) { |
2298 | int j; | |
2299 | u64 alloc_size; | |
2300 | ||
39fb26c3 | 2301 | avail_space += devices_info[i].max_avail * num_stripes; |
6d07bcec | 2302 | alloc_size = devices_info[i].max_avail; |
39fb26c3 | 2303 | for (j = i + 1 - num_stripes; j <= i; j++) |
6d07bcec MX |
2304 | devices_info[j].max_avail -= alloc_size; |
2305 | } | |
2306 | i--; | |
2307 | nr_devices--; | |
2308 | } | |
2309 | ||
2310 | kfree(devices_info); | |
2311 | *free_bytes = avail_space; | |
2312 | return 0; | |
2313 | } | |
2314 | ||
ba7b6e62 DS |
2315 | /* |
2316 | * Calculate numbers for 'df', pessimistic in case of mixed raid profiles. | |
2317 | * | |
2318 | * If there's a redundant raid level at DATA block groups, use the respective | |
2319 | * multiplier to scale the sizes. | |
2320 | * | |
2321 | * Unused device space usage is based on simulating the chunk allocator | |
0d0c71b3 DS |
2322 | * algorithm that respects the device sizes and order of allocations. This is |
2323 | * a close approximation of the actual use but there are other factors that may | |
2324 | * change the result (like a new metadata chunk). | |
ba7b6e62 | 2325 | * |
ca8a51b3 | 2326 | * If metadata is exhausted, f_bavail will be 0. |
ba7b6e62 | 2327 | */ |
8fd17795 CM |
2328 | static int btrfs_statfs(struct dentry *dentry, struct kstatfs *buf) |
2329 | { | |
815745cf AV |
2330 | struct btrfs_fs_info *fs_info = btrfs_sb(dentry->d_sb); |
2331 | struct btrfs_super_block *disk_super = fs_info->super_copy; | |
bd4d1088 JB |
2332 | struct btrfs_space_info *found; |
2333 | u64 total_used = 0; | |
6d07bcec | 2334 | u64 total_free_data = 0; |
ca8a51b3 | 2335 | u64 total_free_meta = 0; |
265fdfa6 | 2336 | u32 bits = fs_info->sectorsize_bits; |
de37aa51 | 2337 | __be32 *fsid = (__be32 *)fs_info->fs_devices->fsid; |
ba7b6e62 DS |
2338 | unsigned factor = 1; |
2339 | struct btrfs_block_rsv *block_rsv = &fs_info->global_block_rsv; | |
6d07bcec | 2340 | int ret; |
ca8a51b3 | 2341 | u64 thresh = 0; |
ae02d1bd | 2342 | int mixed = 0; |
8fd17795 | 2343 | |
72804905 | 2344 | list_for_each_entry(found, &fs_info->space_info, list) { |
6d07bcec | 2345 | if (found->flags & BTRFS_BLOCK_GROUP_DATA) { |
ba7b6e62 DS |
2346 | int i; |
2347 | ||
6d07bcec MX |
2348 | total_free_data += found->disk_total - found->disk_used; |
2349 | total_free_data -= | |
2350 | btrfs_account_ro_block_groups_free_space(found); | |
ba7b6e62 DS |
2351 | |
2352 | for (i = 0; i < BTRFS_NR_RAID_TYPES; i++) { | |
46df06b8 DS |
2353 | if (!list_empty(&found->block_groups[i])) |
2354 | factor = btrfs_bg_type_to_factor( | |
2355 | btrfs_raid_array[i].bg_flag); | |
ba7b6e62 | 2356 | } |
6d07bcec | 2357 | } |
ae02d1bd LB |
2358 | |
2359 | /* | |
2360 | * Metadata in mixed block goup profiles are accounted in data | |
2361 | */ | |
2362 | if (!mixed && found->flags & BTRFS_BLOCK_GROUP_METADATA) { | |
2363 | if (found->flags & BTRFS_BLOCK_GROUP_DATA) | |
2364 | mixed = 1; | |
2365 | else | |
2366 | total_free_meta += found->disk_total - | |
2367 | found->disk_used; | |
2368 | } | |
6d07bcec | 2369 | |
b742bb82 | 2370 | total_used += found->disk_used; |
89a55897 | 2371 | } |
ba7b6e62 | 2372 | |
ba7b6e62 DS |
2373 | buf->f_blocks = div_u64(btrfs_super_total_bytes(disk_super), factor); |
2374 | buf->f_blocks >>= bits; | |
2375 | buf->f_bfree = buf->f_blocks - (div_u64(total_used, factor) >> bits); | |
2376 | ||
2377 | /* Account global block reserve as used, it's in logical size already */ | |
2378 | spin_lock(&block_rsv->lock); | |
41b34acc LB |
2379 | /* Mixed block groups accounting is not byte-accurate, avoid overflow */ |
2380 | if (buf->f_bfree >= block_rsv->size >> bits) | |
2381 | buf->f_bfree -= block_rsv->size >> bits; | |
2382 | else | |
2383 | buf->f_bfree = 0; | |
ba7b6e62 DS |
2384 | spin_unlock(&block_rsv->lock); |
2385 | ||
0d95c1be | 2386 | buf->f_bavail = div_u64(total_free_data, factor); |
6bccf3ab | 2387 | ret = btrfs_calc_avail_data_space(fs_info, &total_free_data); |
7e33fd99 | 2388 | if (ret) |
6d07bcec | 2389 | return ret; |
ba7b6e62 | 2390 | buf->f_bavail += div_u64(total_free_data, factor); |
6d07bcec | 2391 | buf->f_bavail = buf->f_bavail >> bits; |
d397712b | 2392 | |
ca8a51b3 DS |
2393 | /* |
2394 | * We calculate the remaining metadata space minus global reserve. If | |
2395 | * this is (supposedly) smaller than zero, there's no space. But this | |
2396 | * does not hold in practice, the exhausted state happens where's still | |
2397 | * some positive delta. So we apply some guesswork and compare the | |
2398 | * delta to a 4M threshold. (Practically observed delta was ~2M.) | |
2399 | * | |
2400 | * We probably cannot calculate the exact threshold value because this | |
2401 | * depends on the internal reservations requested by various | |
2402 | * operations, so some operations that consume a few metadata will | |
2403 | * succeed even if the Avail is zero. But this is better than the other | |
2404 | * way around. | |
2405 | */ | |
d4417e22 | 2406 | thresh = SZ_4M; |
ca8a51b3 | 2407 | |
d55966c4 JB |
2408 | /* |
2409 | * We only want to claim there's no available space if we can no longer | |
2410 | * allocate chunks for our metadata profile and our global reserve will | |
2411 | * not fit in the free metadata space. If we aren't ->full then we | |
2412 | * still can allocate chunks and thus are fine using the currently | |
2413 | * calculated f_bavail. | |
2414 | */ | |
2415 | if (!mixed && block_rsv->space_info->full && | |
2416 | total_free_meta - thresh < block_rsv->size) | |
ca8a51b3 DS |
2417 | buf->f_bavail = 0; |
2418 | ||
ba7b6e62 DS |
2419 | buf->f_type = BTRFS_SUPER_MAGIC; |
2420 | buf->f_bsize = dentry->d_sb->s_blocksize; | |
2421 | buf->f_namelen = BTRFS_NAME_LEN; | |
2422 | ||
9d03632e | 2423 | /* We treat it as constant endianness (it doesn't matter _which_) |
d397712b | 2424 | because we want the fsid to come out the same whether mounted |
9d03632e DW |
2425 | on a big-endian or little-endian host */ |
2426 | buf->f_fsid.val[0] = be32_to_cpu(fsid[0]) ^ be32_to_cpu(fsid[2]); | |
2427 | buf->f_fsid.val[1] = be32_to_cpu(fsid[1]) ^ be32_to_cpu(fsid[3]); | |
32d48fa1 | 2428 | /* Mask in the root object ID too, to disambiguate subvols */ |
4fd786e6 MT |
2429 | buf->f_fsid.val[0] ^= |
2430 | BTRFS_I(d_inode(dentry))->root->root_key.objectid >> 32; | |
2431 | buf->f_fsid.val[1] ^= | |
2432 | BTRFS_I(d_inode(dentry))->root->root_key.objectid; | |
32d48fa1 | 2433 | |
8fd17795 CM |
2434 | return 0; |
2435 | } | |
b5133862 | 2436 | |
aea52e19 AV |
2437 | static void btrfs_kill_super(struct super_block *sb) |
2438 | { | |
815745cf | 2439 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
aea52e19 | 2440 | kill_anon_super(sb); |
0d4b0463 | 2441 | btrfs_free_fs_info(fs_info); |
aea52e19 AV |
2442 | } |
2443 | ||
2e635a27 CM |
2444 | static struct file_system_type btrfs_fs_type = { |
2445 | .owner = THIS_MODULE, | |
2446 | .name = "btrfs", | |
061dbc6b | 2447 | .mount = btrfs_mount, |
aea52e19 | 2448 | .kill_sb = btrfs_kill_super, |
f667aef6 | 2449 | .fs_flags = FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA, |
2e635a27 | 2450 | }; |
72fa39f5 MT |
2451 | |
2452 | static struct file_system_type btrfs_root_fs_type = { | |
2453 | .owner = THIS_MODULE, | |
2454 | .name = "btrfs", | |
2455 | .mount = btrfs_mount_root, | |
2456 | .kill_sb = btrfs_kill_super, | |
5b9b26f5 | 2457 | .fs_flags = FS_REQUIRES_DEV | FS_BINARY_MOUNTDATA | FS_ALLOW_IDMAP, |
72fa39f5 MT |
2458 | }; |
2459 | ||
7f78e035 | 2460 | MODULE_ALIAS_FS("btrfs"); |
a9218f6b | 2461 | |
d8620958 TVB |
2462 | static int btrfs_control_open(struct inode *inode, struct file *file) |
2463 | { | |
2464 | /* | |
2465 | * The control file's private_data is used to hold the | |
2466 | * transaction when it is started and is used to keep | |
2467 | * track of whether a transaction is already in progress. | |
2468 | */ | |
2469 | file->private_data = NULL; | |
2470 | return 0; | |
2471 | } | |
2472 | ||
d352ac68 | 2473 | /* |
cfe953c8 | 2474 | * Used by /dev/btrfs-control for devices ioctls. |
d352ac68 | 2475 | */ |
8a4b83cc CM |
2476 | static long btrfs_control_ioctl(struct file *file, unsigned int cmd, |
2477 | unsigned long arg) | |
2478 | { | |
2479 | struct btrfs_ioctl_vol_args *vol; | |
36350e95 | 2480 | struct btrfs_device *device = NULL; |
16cab91a | 2481 | dev_t devt = 0; |
c071fcfd | 2482 | int ret = -ENOTTY; |
8a4b83cc | 2483 | |
e441d54d CM |
2484 | if (!capable(CAP_SYS_ADMIN)) |
2485 | return -EPERM; | |
2486 | ||
dae7b665 LZ |
2487 | vol = memdup_user((void __user *)arg, sizeof(*vol)); |
2488 | if (IS_ERR(vol)) | |
2489 | return PTR_ERR(vol); | |
f505754f | 2490 | vol->name[BTRFS_PATH_NAME_MAX] = '\0'; |
c071fcfd | 2491 | |
8a4b83cc CM |
2492 | switch (cmd) { |
2493 | case BTRFS_IOC_SCAN_DEV: | |
899f9307 | 2494 | mutex_lock(&uuid_mutex); |
36350e95 GJ |
2495 | device = btrfs_scan_one_device(vol->name, FMODE_READ, |
2496 | &btrfs_root_fs_type); | |
2497 | ret = PTR_ERR_OR_ZERO(device); | |
899f9307 | 2498 | mutex_unlock(&uuid_mutex); |
8a4b83cc | 2499 | break; |
228a73ab | 2500 | case BTRFS_IOC_FORGET_DEV: |
16cab91a AJ |
2501 | if (vol->name[0] != 0) { |
2502 | ret = lookup_bdev(vol->name, &devt); | |
2503 | if (ret) | |
2504 | break; | |
2505 | } | |
2506 | ret = btrfs_forget_devices(devt); | |
228a73ab | 2507 | break; |
02db0844 | 2508 | case BTRFS_IOC_DEVICES_READY: |
899f9307 | 2509 | mutex_lock(&uuid_mutex); |
36350e95 GJ |
2510 | device = btrfs_scan_one_device(vol->name, FMODE_READ, |
2511 | &btrfs_root_fs_type); | |
2512 | if (IS_ERR(device)) { | |
899f9307 | 2513 | mutex_unlock(&uuid_mutex); |
36350e95 | 2514 | ret = PTR_ERR(device); |
02db0844 | 2515 | break; |
899f9307 | 2516 | } |
36350e95 GJ |
2517 | ret = !(device->fs_devices->num_devices == |
2518 | device->fs_devices->total_devices); | |
899f9307 | 2519 | mutex_unlock(&uuid_mutex); |
02db0844 | 2520 | break; |
c5868f83 | 2521 | case BTRFS_IOC_GET_SUPPORTED_FEATURES: |
d5131b65 | 2522 | ret = btrfs_ioctl_get_supported_features((void __user*)arg); |
c5868f83 | 2523 | break; |
8a4b83cc | 2524 | } |
dae7b665 | 2525 | |
8a4b83cc | 2526 | kfree(vol); |
f819d837 | 2527 | return ret; |
8a4b83cc CM |
2528 | } |
2529 | ||
0176260f | 2530 | static int btrfs_freeze(struct super_block *sb) |
ed0dab6b | 2531 | { |
354aa0fb | 2532 | struct btrfs_trans_handle *trans; |
0b246afa JM |
2533 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
2534 | struct btrfs_root *root = fs_info->tree_root; | |
354aa0fb | 2535 | |
fac03c8d | 2536 | set_bit(BTRFS_FS_FROZEN, &fs_info->flags); |
9e7cc91a WX |
2537 | /* |
2538 | * We don't need a barrier here, we'll wait for any transaction that | |
2539 | * could be in progress on other threads (and do delayed iputs that | |
2540 | * we want to avoid on a frozen filesystem), or do the commit | |
2541 | * ourselves. | |
2542 | */ | |
d4edf39b | 2543 | trans = btrfs_attach_transaction_barrier(root); |
354aa0fb MX |
2544 | if (IS_ERR(trans)) { |
2545 | /* no transaction, don't bother */ | |
2546 | if (PTR_ERR(trans) == -ENOENT) | |
2547 | return 0; | |
2548 | return PTR_ERR(trans); | |
2549 | } | |
3a45bb20 | 2550 | return btrfs_commit_transaction(trans); |
ed0dab6b Y |
2551 | } |
2552 | ||
9e7cc91a WX |
2553 | static int btrfs_unfreeze(struct super_block *sb) |
2554 | { | |
fac03c8d DS |
2555 | struct btrfs_fs_info *fs_info = btrfs_sb(sb); |
2556 | ||
2557 | clear_bit(BTRFS_FS_FROZEN, &fs_info->flags); | |
9e7cc91a WX |
2558 | return 0; |
2559 | } | |
2560 | ||
9c5085c1 JB |
2561 | static int btrfs_show_devname(struct seq_file *m, struct dentry *root) |
2562 | { | |
2563 | struct btrfs_fs_info *fs_info = btrfs_sb(root->d_sb); | |
9c5085c1 | 2564 | |
88c14590 | 2565 | /* |
6605fd2f AJ |
2566 | * There should be always a valid pointer in latest_dev, it may be stale |
2567 | * for a short moment in case it's being deleted but still valid until | |
2568 | * the end of RCU grace period. | |
88c14590 DS |
2569 | */ |
2570 | rcu_read_lock(); | |
6605fd2f | 2571 | seq_escape(m, rcu_str_deref(fs_info->fs_devices->latest_dev->name), " \t\n\\"); |
88c14590 | 2572 | rcu_read_unlock(); |
6605fd2f | 2573 | |
9c5085c1 JB |
2574 | return 0; |
2575 | } | |
2576 | ||
b87221de | 2577 | static const struct super_operations btrfs_super_ops = { |
76dda93c | 2578 | .drop_inode = btrfs_drop_inode, |
bd555975 | 2579 | .evict_inode = btrfs_evict_inode, |
e20d96d6 | 2580 | .put_super = btrfs_put_super, |
d5719762 | 2581 | .sync_fs = btrfs_sync_fs, |
a9572a15 | 2582 | .show_options = btrfs_show_options, |
9c5085c1 | 2583 | .show_devname = btrfs_show_devname, |
2c90e5d6 CM |
2584 | .alloc_inode = btrfs_alloc_inode, |
2585 | .destroy_inode = btrfs_destroy_inode, | |
26602cab | 2586 | .free_inode = btrfs_free_inode, |
8fd17795 | 2587 | .statfs = btrfs_statfs, |
c146afad | 2588 | .remount_fs = btrfs_remount, |
0176260f | 2589 | .freeze_fs = btrfs_freeze, |
9e7cc91a | 2590 | .unfreeze_fs = btrfs_unfreeze, |
e20d96d6 | 2591 | }; |
a9218f6b CM |
2592 | |
2593 | static const struct file_operations btrfs_ctl_fops = { | |
d8620958 | 2594 | .open = btrfs_control_open, |
a9218f6b | 2595 | .unlocked_ioctl = btrfs_control_ioctl, |
1832f2d8 | 2596 | .compat_ioctl = compat_ptr_ioctl, |
a9218f6b | 2597 | .owner = THIS_MODULE, |
6038f373 | 2598 | .llseek = noop_llseek, |
a9218f6b CM |
2599 | }; |
2600 | ||
2601 | static struct miscdevice btrfs_misc = { | |
578454ff | 2602 | .minor = BTRFS_MINOR, |
a9218f6b CM |
2603 | .name = "btrfs-control", |
2604 | .fops = &btrfs_ctl_fops | |
2605 | }; | |
2606 | ||
578454ff KS |
2607 | MODULE_ALIAS_MISCDEV(BTRFS_MINOR); |
2608 | MODULE_ALIAS("devname:btrfs-control"); | |
2609 | ||
f5c29bd9 | 2610 | static int __init btrfs_interface_init(void) |
a9218f6b CM |
2611 | { |
2612 | return misc_register(&btrfs_misc); | |
2613 | } | |
2614 | ||
e67c718b | 2615 | static __cold void btrfs_interface_exit(void) |
a9218f6b | 2616 | { |
f368ed60 | 2617 | misc_deregister(&btrfs_misc); |
a9218f6b CM |
2618 | } |
2619 | ||
f5c29bd9 | 2620 | static void __init btrfs_print_mod_info(void) |
85965600 | 2621 | { |
edf57cbf | 2622 | static const char options[] = "" |
85965600 DS |
2623 | #ifdef CONFIG_BTRFS_DEBUG |
2624 | ", debug=on" | |
2625 | #endif | |
79556c3d SB |
2626 | #ifdef CONFIG_BTRFS_ASSERT |
2627 | ", assert=on" | |
2628 | #endif | |
85965600 DS |
2629 | #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY |
2630 | ", integrity-checker=on" | |
fb592373 JB |
2631 | #endif |
2632 | #ifdef CONFIG_BTRFS_FS_REF_VERIFY | |
2633 | ", ref-verify=on" | |
5b316468 NA |
2634 | #endif |
2635 | #ifdef CONFIG_BLK_DEV_ZONED | |
2636 | ", zoned=yes" | |
2637 | #else | |
2638 | ", zoned=no" | |
ea3dc7d2 DS |
2639 | #endif |
2640 | #ifdef CONFIG_FS_VERITY | |
2641 | ", fsverity=yes" | |
2642 | #else | |
2643 | ", fsverity=no" | |
85965600 | 2644 | #endif |
edf57cbf BVA |
2645 | ; |
2646 | pr_info("Btrfs loaded, crc32c=%s%s\n", crc32c_impl(), options); | |
85965600 DS |
2647 | } |
2648 | ||
2e635a27 CM |
2649 | static int __init init_btrfs_fs(void) |
2650 | { | |
2c90e5d6 | 2651 | int err; |
58176a96 | 2652 | |
63541927 FDBM |
2653 | btrfs_props_init(); |
2654 | ||
58176a96 JB |
2655 | err = btrfs_init_sysfs(); |
2656 | if (err) | |
9678c543 | 2657 | return err; |
58176a96 | 2658 | |
143bede5 | 2659 | btrfs_init_compress(); |
d1310b2e | 2660 | |
261507a0 LZ |
2661 | err = btrfs_init_cachep(); |
2662 | if (err) | |
2663 | goto free_compress; | |
2664 | ||
d1310b2e | 2665 | err = extent_io_init(); |
2f4cbe64 WB |
2666 | if (err) |
2667 | goto free_cachep; | |
2668 | ||
6f0d04f8 | 2669 | err = extent_state_cache_init(); |
d1310b2e CM |
2670 | if (err) |
2671 | goto free_extent_io; | |
2672 | ||
6f0d04f8 JB |
2673 | err = extent_map_init(); |
2674 | if (err) | |
2675 | goto free_extent_state_cache; | |
2676 | ||
6352b91d | 2677 | err = ordered_data_init(); |
2f4cbe64 WB |
2678 | if (err) |
2679 | goto free_extent_map; | |
c8b97818 | 2680 | |
6352b91d MX |
2681 | err = btrfs_delayed_inode_init(); |
2682 | if (err) | |
2683 | goto free_ordered_data; | |
2684 | ||
9247f317 | 2685 | err = btrfs_auto_defrag_init(); |
16cdcec7 MX |
2686 | if (err) |
2687 | goto free_delayed_inode; | |
2688 | ||
78a6184a | 2689 | err = btrfs_delayed_ref_init(); |
9247f317 MX |
2690 | if (err) |
2691 | goto free_auto_defrag; | |
2692 | ||
b9e9a6cb WS |
2693 | err = btrfs_prelim_ref_init(); |
2694 | if (err) | |
af13b492 | 2695 | goto free_delayed_ref; |
b9e9a6cb | 2696 | |
97eb6b69 DS |
2697 | err = btrfs_interface_init(); |
2698 | if (err) | |
d7b9416f | 2699 | goto free_prelim_ref; |
97eb6b69 | 2700 | |
8ae1af3c | 2701 | btrfs_print_mod_info(); |
dc11dd5d JB |
2702 | |
2703 | err = btrfs_run_sanity_tests(); | |
2704 | if (err) | |
2705 | goto unregister_ioctl; | |
2706 | ||
2707 | err = register_filesystem(&btrfs_fs_type); | |
2708 | if (err) | |
2709 | goto unregister_ioctl; | |
74255aa0 | 2710 | |
2f4cbe64 WB |
2711 | return 0; |
2712 | ||
a9218f6b CM |
2713 | unregister_ioctl: |
2714 | btrfs_interface_exit(); | |
b9e9a6cb WS |
2715 | free_prelim_ref: |
2716 | btrfs_prelim_ref_exit(); | |
78a6184a MX |
2717 | free_delayed_ref: |
2718 | btrfs_delayed_ref_exit(); | |
9247f317 MX |
2719 | free_auto_defrag: |
2720 | btrfs_auto_defrag_exit(); | |
16cdcec7 MX |
2721 | free_delayed_inode: |
2722 | btrfs_delayed_inode_exit(); | |
6352b91d MX |
2723 | free_ordered_data: |
2724 | ordered_data_exit(); | |
2f4cbe64 WB |
2725 | free_extent_map: |
2726 | extent_map_exit(); | |
6f0d04f8 JB |
2727 | free_extent_state_cache: |
2728 | extent_state_cache_exit(); | |
d1310b2e CM |
2729 | free_extent_io: |
2730 | extent_io_exit(); | |
2f4cbe64 WB |
2731 | free_cachep: |
2732 | btrfs_destroy_cachep(); | |
261507a0 LZ |
2733 | free_compress: |
2734 | btrfs_exit_compress(); | |
2f4cbe64 | 2735 | btrfs_exit_sysfs(); |
9678c543 | 2736 | |
2f4cbe64 | 2737 | return err; |
2e635a27 CM |
2738 | } |
2739 | ||
2740 | static void __exit exit_btrfs_fs(void) | |
2741 | { | |
39279cc3 | 2742 | btrfs_destroy_cachep(); |
78a6184a | 2743 | btrfs_delayed_ref_exit(); |
9247f317 | 2744 | btrfs_auto_defrag_exit(); |
16cdcec7 | 2745 | btrfs_delayed_inode_exit(); |
b9e9a6cb | 2746 | btrfs_prelim_ref_exit(); |
6352b91d | 2747 | ordered_data_exit(); |
a52d9a80 | 2748 | extent_map_exit(); |
6f0d04f8 | 2749 | extent_state_cache_exit(); |
d1310b2e | 2750 | extent_io_exit(); |
a9218f6b | 2751 | btrfs_interface_exit(); |
2e635a27 | 2752 | unregister_filesystem(&btrfs_fs_type); |
58176a96 | 2753 | btrfs_exit_sysfs(); |
8a4b83cc | 2754 | btrfs_cleanup_fs_uuids(); |
261507a0 | 2755 | btrfs_exit_compress(); |
2e635a27 CM |
2756 | } |
2757 | ||
60efa5eb | 2758 | late_initcall(init_btrfs_fs); |
2e635a27 CM |
2759 | module_exit(exit_btrfs_fs) |
2760 | ||
2761 | MODULE_LICENSE("GPL"); | |
d5178578 | 2762 | MODULE_SOFTDEP("pre: crc32c"); |
3951e7f0 | 2763 | MODULE_SOFTDEP("pre: xxhash64"); |
3831bf00 | 2764 | MODULE_SOFTDEP("pre: sha256"); |
352ae07b | 2765 | MODULE_SOFTDEP("pre: blake2b-256"); |