Commit | Line | Data |
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9888c340 | 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
6cbd5570 CM |
2 | /* |
3 | * Copyright (C) 2007 Oracle. All rights reserved. | |
6cbd5570 CM |
4 | */ |
5 | ||
9888c340 DS |
6 | #ifndef BTRFS_INODE_H |
7 | #define BTRFS_INODE_H | |
2c90e5d6 | 8 | |
778ba82b | 9 | #include <linux/hash.h> |
e3b318d1 | 10 | #include <linux/refcount.h> |
a52d9a80 | 11 | #include "extent_map.h" |
d1310b2e | 12 | #include "extent_io.h" |
e6dcd2dc | 13 | #include "ordered-data.h" |
16cdcec7 | 14 | #include "delayed-inode.h" |
a52d9a80 | 15 | |
528ee697 FM |
16 | /* |
17 | * Since we search a directory based on f_pos (struct dir_context::pos) we have | |
18 | * to start at 2 since '.' and '..' have f_pos of 0 and 1 respectively, so | |
19 | * everybody else has to start at 2 (see btrfs_real_readdir() and dir_emit_dots()). | |
20 | */ | |
21 | #define BTRFS_DIR_START_INDEX 2 | |
22 | ||
72ac3c0d JB |
23 | /* |
24 | * ordered_data_close is set by truncate when a file that used | |
25 | * to have good data has been truncated to zero. When it is set | |
26 | * the btrfs file release call will add this inode to the | |
27 | * ordered operations list so that we make sure to flush out any | |
28 | * new data the application may have written before commit. | |
29 | */ | |
7efc3e34 | 30 | enum { |
1fd4033d | 31 | BTRFS_INODE_FLUSH_ON_CLOSE, |
7efc3e34 OS |
32 | BTRFS_INODE_DUMMY, |
33 | BTRFS_INODE_IN_DEFRAG, | |
34 | BTRFS_INODE_HAS_ASYNC_EXTENT, | |
48778179 FM |
35 | /* |
36 | * Always set under the VFS' inode lock, otherwise it can cause races | |
37 | * during fsync (we start as a fast fsync and then end up in a full | |
38 | * fsync racing with ordered extent completion). | |
39 | */ | |
7efc3e34 OS |
40 | BTRFS_INODE_NEEDS_FULL_SYNC, |
41 | BTRFS_INODE_COPY_EVERYTHING, | |
42 | BTRFS_INODE_IN_DELALLOC_LIST, | |
7efc3e34 | 43 | BTRFS_INODE_HAS_PROPS, |
3cd24c69 | 44 | BTRFS_INODE_SNAPSHOT_FLUSH, |
f2f121ab FM |
45 | /* |
46 | * Set and used when logging an inode and it serves to signal that an | |
47 | * inode does not have xattrs, so subsequent fsyncs can avoid searching | |
48 | * for xattrs to log. This bit must be cleared whenever a xattr is added | |
49 | * to an inode. | |
50 | */ | |
51 | BTRFS_INODE_NO_XATTRS, | |
3d45f221 FM |
52 | /* |
53 | * Set when we are in a context where we need to start a transaction and | |
54 | * have dirty pages with the respective file range locked. This is to | |
55 | * ensure that when reserving space for the transaction, if we are low | |
56 | * on available space and need to flush delalloc, we will not flush | |
57 | * delalloc for this inode, because that could result in a deadlock (on | |
58 | * the file range, inode's io_tree). | |
59 | */ | |
60 | BTRFS_INODE_NO_DELALLOC_FLUSH, | |
14605409 BB |
61 | /* |
62 | * Set when we are working on enabling verity for a file. Computing and | |
63 | * writing the whole Merkle tree can take a while so we want to prevent | |
64 | * races where two separate tasks attempt to simultaneously start verity | |
65 | * on the same file. | |
66 | */ | |
67 | BTRFS_INODE_VERITY_IN_PROGRESS, | |
9b9b8854 JB |
68 | /* Set when this inode is a free space inode. */ |
69 | BTRFS_INODE_FREE_SPACE_INODE, | |
7efc3e34 | 70 | }; |
72ac3c0d | 71 | |
f1ace244 | 72 | /* in memory btrfs inode */ |
2c90e5d6 | 73 | struct btrfs_inode { |
d352ac68 | 74 | /* which subvolume this inode belongs to */ |
d6e4a428 | 75 | struct btrfs_root *root; |
d352ac68 | 76 | |
d352ac68 CM |
77 | /* key used to find this inode on disk. This is used by the code |
78 | * to read in roots of subvolumes | |
79 | */ | |
d6e4a428 | 80 | struct btrfs_key location; |
d352ac68 | 81 | |
2f2ff0ee FM |
82 | /* |
83 | * Lock for counters and all fields used to determine if the inode is in | |
84 | * the log or not (last_trans, last_sub_trans, last_log_commit, | |
2766ff61 FM |
85 | * logged_trans), to access/update new_delalloc_bytes and to update the |
86 | * VFS' inode number of bytes used. | |
2f2ff0ee | 87 | */ |
9e0baf60 JB |
88 | spinlock_t lock; |
89 | ||
d352ac68 | 90 | /* the extent_tree has caches of all the extent mappings to disk */ |
a52d9a80 | 91 | struct extent_map_tree extent_tree; |
d352ac68 CM |
92 | |
93 | /* the io_tree does range state (DIRTY, LOCKED etc) */ | |
d1310b2e | 94 | struct extent_io_tree io_tree; |
d352ac68 | 95 | |
41a2ee75 JB |
96 | /* |
97 | * Keep track of where the inode has extent items mapped in order to | |
98 | * make sure the i_size adjustments are accurate | |
99 | */ | |
100 | struct extent_io_tree file_extent_tree; | |
101 | ||
d352ac68 | 102 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 103 | struct mutex log_mutex; |
d352ac68 CM |
104 | |
105 | /* used to order data wrt metadata */ | |
e6dcd2dc | 106 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 107 | |
d352ac68 CM |
108 | /* list of all the delalloc inodes in the FS. There are times we need |
109 | * to write all the delalloc pages to disk, and this list is used | |
110 | * to walk them all. | |
111 | */ | |
ea8c2819 CM |
112 | struct list_head delalloc_inodes; |
113 | ||
5d4f98a2 YZ |
114 | /* node for the red-black tree that links inodes in subvolume root */ |
115 | struct rb_node rb_node; | |
116 | ||
72ac3c0d JB |
117 | unsigned long runtime_flags; |
118 | ||
d352ac68 CM |
119 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
120 | * enough field for this. | |
121 | */ | |
e02119d5 CM |
122 | u64 generation; |
123 | ||
15ee9bc7 JB |
124 | /* |
125 | * transid of the trans_handle that last modified this inode | |
126 | */ | |
127 | u64 last_trans; | |
257c62e1 CM |
128 | |
129 | /* | |
bb14a59b | 130 | * transid that last logged this inode |
257c62e1 | 131 | */ |
bb14a59b | 132 | u64 logged_trans; |
257c62e1 | 133 | |
e02119d5 | 134 | /* |
bb14a59b | 135 | * log transid when this inode was last modified |
e02119d5 | 136 | */ |
bb14a59b MX |
137 | int last_sub_trans; |
138 | ||
139 | /* a local copy of root's last_log_commit */ | |
140 | int last_log_commit; | |
49eb7e46 | 141 | |
fa4b8cb1 FM |
142 | union { |
143 | /* | |
144 | * Total number of bytes pending delalloc, used by stat to | |
145 | * calculate the real block usage of the file. This is used | |
146 | * only for files. | |
147 | */ | |
148 | u64 delalloc_bytes; | |
149 | /* | |
150 | * The lowest possible index of the next dir index key which | |
151 | * points to an inode that needs to be logged. | |
152 | * This is used only for directories. | |
153 | * Use the helpers btrfs_get_first_dir_index_to_log() and | |
154 | * btrfs_set_first_dir_index_to_log() to access this field. | |
155 | */ | |
156 | u64 first_dir_index_to_log; | |
157 | }; | |
dc287224 FM |
158 | |
159 | union { | |
160 | /* | |
161 | * Total number of bytes pending delalloc that fall within a file | |
162 | * range that is either a hole or beyond EOF (and no prealloc extent | |
163 | * exists in the range). This is always <= delalloc_bytes and this | |
164 | * is used only for files. | |
165 | */ | |
166 | u64 new_delalloc_bytes; | |
167 | /* | |
168 | * The offset of the last dir index key that was logged. | |
169 | * This is used only for directories. | |
170 | */ | |
171 | u64 last_dir_index_offset; | |
172 | }; | |
a7e3b975 | 173 | |
47059d93 WS |
174 | /* |
175 | * total number of bytes pending defrag, used by stat to check whether | |
176 | * it needs COW. | |
177 | */ | |
178 | u64 defrag_bytes; | |
179 | ||
d352ac68 CM |
180 | /* |
181 | * the size of the file stored in the metadata on disk. data=ordered | |
182 | * means the in-memory i_size might be larger than the size on disk | |
183 | * because not all the blocks are written yet. | |
184 | */ | |
dbe674a9 | 185 | u64 disk_i_size; |
d352ac68 | 186 | |
aec7477b | 187 | /* |
528ee697 FM |
188 | * If this is a directory then index_cnt is the counter for the index |
189 | * number for new files that are created. For an empty directory, this | |
190 | * must be initialized to BTRFS_DIR_START_INDEX. | |
aec7477b JB |
191 | */ |
192 | u64 index_cnt; | |
d352ac68 | 193 | |
67de1176 MX |
194 | /* Cache the directory index number to speed the dir/file remove */ |
195 | u64 dir_index; | |
196 | ||
12fcfd22 CM |
197 | /* the fsync log has some corner cases that mean we have to check |
198 | * directories to see if any unlinks have been done before | |
199 | * the directory was logged. See tree-log.c for all the | |
200 | * details | |
201 | */ | |
202 | u64 last_unlink_trans; | |
203 | ||
3ebac17c FM |
204 | /* |
205 | * The id/generation of the last transaction where this inode was | |
206 | * either the source or the destination of a clone/dedupe operation. | |
207 | * Used when logging an inode to know if there are shared extents that | |
208 | * need special care when logging checksum items, to avoid duplicate | |
209 | * checksum items in a log (which can lead to a corruption where we end | |
210 | * up with missing checksum ranges after log replay). | |
211 | * Protected by the vfs inode lock. | |
212 | */ | |
213 | u64 last_reflink_trans; | |
214 | ||
7709cde3 JB |
215 | /* |
216 | * Number of bytes outstanding that are going to need csums. This is | |
217 | * used in ENOSPC accounting. | |
218 | */ | |
219 | u64 csum_bytes; | |
220 | ||
77eea05e | 221 | /* Backwards incompatible flags, lower half of inode_item::flags */ |
f1bdcc0a | 222 | u32 flags; |
77eea05e BB |
223 | /* Read-only compatibility flags, upper half of inode_item::flags */ |
224 | u32 ro_flags; | |
f1bdcc0a | 225 | |
9ed74f2d | 226 | /* |
32c00aff JB |
227 | * Counters to keep track of the number of extent item's we may use due |
228 | * to delalloc and such. outstanding_extents is the number of extent | |
229 | * items we think we'll end up using, and reserved_extents is the number | |
230 | * of extent items we've reserved metadata for. | |
9ed74f2d | 231 | */ |
9e0baf60 | 232 | unsigned outstanding_extents; |
69fe2d75 JB |
233 | |
234 | struct btrfs_block_rsv block_rsv; | |
9ed74f2d | 235 | |
1e701a32 | 236 | /* |
b52aa8c9 | 237 | * Cached values of inode properties |
1e701a32 | 238 | */ |
b52aa8c9 | 239 | unsigned prop_compress; /* per-file compression algorithm */ |
eec63c65 DS |
240 | /* |
241 | * Force compression on the file using the defrag ioctl, could be | |
242 | * different from prop_compress and takes precedence if set | |
243 | */ | |
244 | unsigned defrag_compress; | |
1e701a32 | 245 | |
16cdcec7 MX |
246 | struct btrfs_delayed_node *delayed_node; |
247 | ||
9cc97d64 | 248 | /* File creation time. */ |
d3c6be6f | 249 | struct timespec64 i_otime; |
9cc97d64 | 250 | |
8089fe62 DS |
251 | /* Hook into fs_info->delayed_iputs */ |
252 | struct list_head delayed_iput; | |
8089fe62 | 253 | |
8318ba79 | 254 | struct rw_semaphore i_mmap_lock; |
d352ac68 | 255 | struct inode vfs_inode; |
2c90e5d6 | 256 | }; |
dbe674a9 | 257 | |
fa4b8cb1 FM |
258 | static inline u64 btrfs_get_first_dir_index_to_log(const struct btrfs_inode *inode) |
259 | { | |
260 | return READ_ONCE(inode->first_dir_index_to_log); | |
261 | } | |
262 | ||
263 | static inline void btrfs_set_first_dir_index_to_log(struct btrfs_inode *inode, | |
264 | u64 index) | |
265 | { | |
266 | WRITE_ONCE(inode->first_dir_index_to_log, index); | |
267 | } | |
268 | ||
9a35b637 | 269 | static inline struct btrfs_inode *BTRFS_I(const struct inode *inode) |
2c90e5d6 CM |
270 | { |
271 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
272 | } | |
273 | ||
778ba82b FDBM |
274 | static inline unsigned long btrfs_inode_hash(u64 objectid, |
275 | const struct btrfs_root *root) | |
276 | { | |
4fd786e6 | 277 | u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME); |
778ba82b FDBM |
278 | |
279 | #if BITS_PER_LONG == 32 | |
280 | h = (h >> 32) ^ (h & 0xffffffff); | |
281 | #endif | |
282 | ||
283 | return (unsigned long)h; | |
284 | } | |
285 | ||
cf2404a9 FM |
286 | #if BITS_PER_LONG == 32 |
287 | ||
288 | /* | |
289 | * On 32 bit systems the i_ino of struct inode is 32 bits (unsigned long), so | |
290 | * we use the inode's location objectid which is a u64 to avoid truncation. | |
291 | */ | |
9a35b637 | 292 | static inline u64 btrfs_ino(const struct btrfs_inode *inode) |
33345d01 | 293 | { |
4a0cc7ca | 294 | u64 ino = inode->location.objectid; |
33345d01 | 295 | |
adac5584 FM |
296 | /* type == BTRFS_ROOT_ITEM_KEY: subvol dir */ |
297 | if (inode->location.type == BTRFS_ROOT_ITEM_KEY) | |
4a0cc7ca | 298 | ino = inode->vfs_inode.i_ino; |
33345d01 LZ |
299 | return ino; |
300 | } | |
301 | ||
cf2404a9 FM |
302 | #else |
303 | ||
304 | static inline u64 btrfs_ino(const struct btrfs_inode *inode) | |
305 | { | |
306 | return inode->vfs_inode.i_ino; | |
307 | } | |
308 | ||
309 | #endif | |
310 | ||
6ef06d27 | 311 | static inline void btrfs_i_size_write(struct btrfs_inode *inode, u64 size) |
dbe674a9 | 312 | { |
6ef06d27 NB |
313 | i_size_write(&inode->vfs_inode, size); |
314 | inode->disk_i_size = size; | |
dbe674a9 CM |
315 | } |
316 | ||
70ddc553 | 317 | static inline bool btrfs_is_free_space_inode(struct btrfs_inode *inode) |
2cf8572d | 318 | { |
9b9b8854 | 319 | return test_bit(BTRFS_INODE_FREE_SPACE_INODE, &inode->runtime_flags); |
2cf8572d CM |
320 | } |
321 | ||
06f2548f NB |
322 | static inline bool is_data_inode(struct inode *inode) |
323 | { | |
324 | return btrfs_ino(BTRFS_I(inode)) != BTRFS_BTREE_INODE_OBJECTID; | |
325 | } | |
326 | ||
8b62f87b JB |
327 | static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode, |
328 | int mod) | |
329 | { | |
330 | lockdep_assert_held(&inode->lock); | |
331 | inode->outstanding_extents += mod; | |
332 | if (btrfs_is_free_space_inode(inode)) | |
333 | return; | |
dd48d407 | 334 | trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode), |
64425500 | 335 | mod, inode->outstanding_extents); |
8b62f87b JB |
336 | } |
337 | ||
bc0939fc FM |
338 | /* |
339 | * Called every time after doing a buffered, direct IO or memory mapped write. | |
340 | * | |
341 | * This is to ensure that if we write to a file that was previously fsynced in | |
342 | * the current transaction, then try to fsync it again in the same transaction, | |
343 | * we will know that there were changes in the file and that it needs to be | |
344 | * logged. | |
345 | */ | |
346 | static inline void btrfs_set_inode_last_sub_trans(struct btrfs_inode *inode) | |
347 | { | |
348 | spin_lock(&inode->lock); | |
349 | inode->last_sub_trans = inode->root->log_transid; | |
350 | spin_unlock(&inode->lock); | |
351 | } | |
352 | ||
23e3337f FM |
353 | /* |
354 | * Should be called while holding the inode's VFS lock in exclusive mode or in a | |
355 | * context where no one else can access the inode concurrently (during inode | |
356 | * creation or when loading an inode from disk). | |
357 | */ | |
358 | static inline void btrfs_set_inode_full_sync(struct btrfs_inode *inode) | |
359 | { | |
360 | set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags); | |
361 | /* | |
362 | * The inode may have been part of a reflink operation in the last | |
363 | * transaction that modified it, and then a fsync has reset the | |
364 | * last_reflink_trans to avoid subsequent fsyncs in the same | |
365 | * transaction to do unnecessary work. So update last_reflink_trans | |
366 | * to the last_trans value (we have to be pessimistic and assume a | |
367 | * reflink happened). | |
368 | * | |
369 | * The ->last_trans is protected by the inode's spinlock and we can | |
370 | * have a concurrent ordered extent completion update it. Also set | |
371 | * last_reflink_trans to ->last_trans only if the former is less than | |
372 | * the later, because we can be called in a context where | |
373 | * last_reflink_trans was set to the current transaction generation | |
374 | * while ->last_trans was not yet updated in the current transaction, | |
375 | * and therefore has a lower value. | |
376 | */ | |
377 | spin_lock(&inode->lock); | |
378 | if (inode->last_reflink_trans < inode->last_trans) | |
379 | inode->last_reflink_trans = inode->last_trans; | |
380 | spin_unlock(&inode->lock); | |
381 | } | |
382 | ||
209ecbb8 | 383 | static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation) |
22ee6985 | 384 | { |
209ecbb8 | 385 | bool ret = false; |
2f2ff0ee | 386 | |
0f8939b8 NB |
387 | spin_lock(&inode->lock); |
388 | if (inode->logged_trans == generation && | |
389 | inode->last_sub_trans <= inode->last_log_commit && | |
209ecbb8 FM |
390 | inode->last_sub_trans <= inode->root->last_log_commit) |
391 | ret = true; | |
0f8939b8 | 392 | spin_unlock(&inode->lock); |
2f2ff0ee | 393 | return ret; |
22ee6985 JB |
394 | } |
395 | ||
e6f9d696 CCC |
396 | /* |
397 | * Check if the inode has flags compatible with compression | |
398 | */ | |
399 | static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode) | |
400 | { | |
401 | if (inode->flags & BTRFS_INODE_NODATACOW || | |
402 | inode->flags & BTRFS_INODE_NODATASUM) | |
403 | return false; | |
404 | return true; | |
405 | } | |
406 | ||
7ebc7e5f JT |
407 | /* Array of bytes with variable length, hexadecimal format 0x1234 */ |
408 | #define CSUM_FMT "0x%*phN" | |
409 | #define CSUM_FMT_VALUE(size, bytes) size, bytes | |
2885fd63 | 410 | |
2885fd63 JB |
411 | int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page, |
412 | u32 pgoff, u8 *csum, const u8 * const csum_expected); | |
e5219044 CH |
413 | bool btrfs_data_csum_ok(struct btrfs_bio *bbio, struct btrfs_device *dev, |
414 | u32 bio_offset, struct bio_vec *bv); | |
2885fd63 JB |
415 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, |
416 | u64 *orig_start, u64 *orig_block_len, | |
417 | u64 *ram_bytes, bool nowait, bool strict); | |
418 | ||
419 | void __btrfs_del_delalloc_inode(struct btrfs_root *root, struct btrfs_inode *inode); | |
420 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); | |
421 | int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); | |
422 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, | |
423 | struct btrfs_inode *dir, struct btrfs_inode *inode, | |
424 | const struct fscrypt_str *name); | |
425 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
426 | struct btrfs_inode *parent_inode, struct btrfs_inode *inode, | |
427 | const struct fscrypt_str *name, int add_backref, u64 index); | |
3c4f91e2 | 428 | int btrfs_delete_subvolume(struct btrfs_inode *dir, struct dentry *dentry); |
2885fd63 JB |
429 | int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, |
430 | int front); | |
431 | ||
432 | int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context); | |
433 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr, | |
434 | bool in_reclaim_context); | |
435 | int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, | |
436 | unsigned int extra_bits, | |
437 | struct extent_state **cached_state); | |
438 | ||
439 | struct btrfs_new_inode_args { | |
440 | /* Input */ | |
441 | struct inode *dir; | |
442 | struct dentry *dentry; | |
443 | struct inode *inode; | |
444 | bool orphan; | |
445 | bool subvol; | |
446 | ||
447 | /* Output from btrfs_new_inode_prepare(), input to btrfs_create_new_inode(). */ | |
448 | struct posix_acl *default_acl; | |
449 | struct posix_acl *acl; | |
450 | struct fscrypt_name fname; | |
451 | }; | |
452 | ||
453 | int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args, | |
454 | unsigned int *trans_num_items); | |
455 | int btrfs_create_new_inode(struct btrfs_trans_handle *trans, | |
456 | struct btrfs_new_inode_args *args); | |
457 | void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args); | |
f2d40141 | 458 | struct inode *btrfs_new_subvol_inode(struct mnt_idmap *idmap, |
2885fd63 | 459 | struct inode *dir); |
4c5d166f | 460 | void btrfs_set_delalloc_extent(struct btrfs_inode *inode, struct extent_state *state, |
2885fd63 | 461 | u32 bits); |
bd54766e | 462 | void btrfs_clear_delalloc_extent(struct btrfs_inode *inode, |
2885fd63 | 463 | struct extent_state *state, u32 bits); |
2454151c | 464 | void btrfs_merge_delalloc_extent(struct btrfs_inode *inode, struct extent_state *new, |
2885fd63 | 465 | struct extent_state *other); |
62798a49 | 466 | void btrfs_split_delalloc_extent(struct btrfs_inode *inode, |
2885fd63 JB |
467 | struct extent_state *orig, u64 split); |
468 | void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end); | |
469 | vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); | |
470 | void btrfs_evict_inode(struct inode *inode); | |
471 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
472 | void btrfs_destroy_inode(struct inode *inode); | |
473 | void btrfs_free_inode(struct inode *inode); | |
474 | int btrfs_drop_inode(struct inode *inode); | |
475 | int __init btrfs_init_cachep(void); | |
476 | void __cold btrfs_destroy_cachep(void); | |
477 | struct inode *btrfs_iget_path(struct super_block *s, u64 ino, | |
478 | struct btrfs_root *root, struct btrfs_path *path); | |
479 | struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); | |
480 | struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, | |
481 | struct page *page, size_t pg_offset, | |
482 | u64 start, u64 end); | |
483 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
484 | struct btrfs_root *root, struct btrfs_inode *inode); | |
485 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, | |
486 | struct btrfs_root *root, struct btrfs_inode *inode); | |
487 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct btrfs_inode *inode); | |
488 | int btrfs_orphan_cleanup(struct btrfs_root *root); | |
489 | int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); | |
e55cf7ca | 490 | void btrfs_add_delayed_iput(struct btrfs_inode *inode); |
2885fd63 JB |
491 | void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); |
492 | int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); | |
493 | int btrfs_prealloc_file_range(struct inode *inode, int mode, | |
494 | u64 start, u64 num_bytes, u64 min_size, | |
495 | loff_t actual_len, u64 *alloc_hint); | |
496 | int btrfs_prealloc_file_range_trans(struct inode *inode, | |
497 | struct btrfs_trans_handle *trans, int mode, | |
498 | u64 start, u64 num_bytes, u64 min_size, | |
499 | loff_t actual_len, u64 *alloc_hint); | |
500 | int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, | |
c56cbe90 | 501 | u64 start, u64 end, struct writeback_control *wbc); |
2885fd63 | 502 | int btrfs_writepage_cow_fixup(struct page *page); |
2885fd63 JB |
503 | int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info, |
504 | int compress_type); | |
505 | int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode, | |
506 | u64 file_offset, u64 disk_bytenr, | |
507 | u64 disk_io_size, | |
508 | struct page **pages); | |
509 | ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter, | |
510 | struct btrfs_ioctl_encoded_io_args *encoded); | |
511 | ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from, | |
512 | const struct btrfs_ioctl_encoded_io_args *encoded); | |
513 | ||
514 | ssize_t btrfs_dio_read(struct kiocb *iocb, struct iov_iter *iter, | |
515 | size_t done_before); | |
516 | struct iomap_dio *btrfs_dio_write(struct kiocb *iocb, struct iov_iter *iter, | |
517 | size_t done_before); | |
518 | ||
519 | extern const struct dentry_operations btrfs_dentry_operations; | |
520 | ||
521 | /* Inode locking type flags, by default the exclusive lock is taken. */ | |
522 | enum btrfs_ilock_type { | |
523 | ENUM_BIT(BTRFS_ILOCK_SHARED), | |
524 | ENUM_BIT(BTRFS_ILOCK_TRY), | |
525 | ENUM_BIT(BTRFS_ILOCK_MMAP), | |
526 | }; | |
527 | ||
29b6352b | 528 | int btrfs_inode_lock(struct btrfs_inode *inode, unsigned int ilock_flags); |
e5d4d75b | 529 | void btrfs_inode_unlock(struct btrfs_inode *inode, unsigned int ilock_flags); |
2885fd63 JB |
530 | void btrfs_update_inode_bytes(struct btrfs_inode *inode, const u64 add_bytes, |
531 | const u64 del_bytes); | |
532 | void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end); | |
533 | ||
2c90e5d6 | 534 | #endif |