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 CM |
95 | |
96 | /* special utility tree used to record which mirrors have already been | |
97 | * tried when checksums fail for a given block | |
98 | */ | |
87c11705 JB |
99 | struct rb_root io_failure_tree; |
100 | spinlock_t io_failure_lock; | |
d352ac68 | 101 | |
41a2ee75 JB |
102 | /* |
103 | * Keep track of where the inode has extent items mapped in order to | |
104 | * make sure the i_size adjustments are accurate | |
105 | */ | |
106 | struct extent_io_tree file_extent_tree; | |
107 | ||
d352ac68 | 108 | /* held while logging the inode in tree-log.c */ |
e02119d5 | 109 | struct mutex log_mutex; |
d352ac68 CM |
110 | |
111 | /* used to order data wrt metadata */ | |
e6dcd2dc | 112 | struct btrfs_ordered_inode_tree ordered_tree; |
15ee9bc7 | 113 | |
d352ac68 CM |
114 | /* list of all the delalloc inodes in the FS. There are times we need |
115 | * to write all the delalloc pages to disk, and this list is used | |
116 | * to walk them all. | |
117 | */ | |
ea8c2819 CM |
118 | struct list_head delalloc_inodes; |
119 | ||
5d4f98a2 YZ |
120 | /* node for the red-black tree that links inodes in subvolume root */ |
121 | struct rb_node rb_node; | |
122 | ||
72ac3c0d JB |
123 | unsigned long runtime_flags; |
124 | ||
9c931c5a | 125 | /* Keep track of who's O_SYNC/fsyncing currently */ |
b812ce28 JB |
126 | atomic_t sync_writers; |
127 | ||
d352ac68 CM |
128 | /* full 64 bit generation number, struct vfs_inode doesn't have a big |
129 | * enough field for this. | |
130 | */ | |
e02119d5 CM |
131 | u64 generation; |
132 | ||
15ee9bc7 JB |
133 | /* |
134 | * transid of the trans_handle that last modified this inode | |
135 | */ | |
136 | u64 last_trans; | |
257c62e1 CM |
137 | |
138 | /* | |
bb14a59b | 139 | * transid that last logged this inode |
257c62e1 | 140 | */ |
bb14a59b | 141 | u64 logged_trans; |
257c62e1 | 142 | |
e02119d5 | 143 | /* |
bb14a59b | 144 | * log transid when this inode was last modified |
e02119d5 | 145 | */ |
bb14a59b MX |
146 | int last_sub_trans; |
147 | ||
148 | /* a local copy of root's last_log_commit */ | |
149 | int last_log_commit; | |
49eb7e46 | 150 | |
339d0354 FM |
151 | /* |
152 | * Total number of bytes pending delalloc, used by stat to calculate the | |
153 | * real block usage of the file. This is used only for files. | |
154 | */ | |
155 | u64 delalloc_bytes; | |
dc287224 FM |
156 | |
157 | union { | |
158 | /* | |
159 | * Total number of bytes pending delalloc that fall within a file | |
160 | * range that is either a hole or beyond EOF (and no prealloc extent | |
161 | * exists in the range). This is always <= delalloc_bytes and this | |
162 | * is used only for files. | |
163 | */ | |
164 | u64 new_delalloc_bytes; | |
165 | /* | |
166 | * The offset of the last dir index key that was logged. | |
167 | * This is used only for directories. | |
168 | */ | |
169 | u64 last_dir_index_offset; | |
170 | }; | |
a7e3b975 | 171 | |
47059d93 WS |
172 | /* |
173 | * total number of bytes pending defrag, used by stat to check whether | |
174 | * it needs COW. | |
175 | */ | |
176 | u64 defrag_bytes; | |
177 | ||
d352ac68 CM |
178 | /* |
179 | * the size of the file stored in the metadata on disk. data=ordered | |
180 | * means the in-memory i_size might be larger than the size on disk | |
181 | * because not all the blocks are written yet. | |
182 | */ | |
dbe674a9 | 183 | u64 disk_i_size; |
d352ac68 | 184 | |
aec7477b | 185 | /* |
528ee697 FM |
186 | * If this is a directory then index_cnt is the counter for the index |
187 | * number for new files that are created. For an empty directory, this | |
188 | * must be initialized to BTRFS_DIR_START_INDEX. | |
aec7477b JB |
189 | */ |
190 | u64 index_cnt; | |
d352ac68 | 191 | |
67de1176 MX |
192 | /* Cache the directory index number to speed the dir/file remove */ |
193 | u64 dir_index; | |
194 | ||
12fcfd22 CM |
195 | /* the fsync log has some corner cases that mean we have to check |
196 | * directories to see if any unlinks have been done before | |
197 | * the directory was logged. See tree-log.c for all the | |
198 | * details | |
199 | */ | |
200 | u64 last_unlink_trans; | |
201 | ||
3ebac17c FM |
202 | /* |
203 | * The id/generation of the last transaction where this inode was | |
204 | * either the source or the destination of a clone/dedupe operation. | |
205 | * Used when logging an inode to know if there are shared extents that | |
206 | * need special care when logging checksum items, to avoid duplicate | |
207 | * checksum items in a log (which can lead to a corruption where we end | |
208 | * up with missing checksum ranges after log replay). | |
209 | * Protected by the vfs inode lock. | |
210 | */ | |
211 | u64 last_reflink_trans; | |
212 | ||
7709cde3 JB |
213 | /* |
214 | * Number of bytes outstanding that are going to need csums. This is | |
215 | * used in ENOSPC accounting. | |
216 | */ | |
217 | u64 csum_bytes; | |
218 | ||
77eea05e | 219 | /* Backwards incompatible flags, lower half of inode_item::flags */ |
f1bdcc0a | 220 | u32 flags; |
77eea05e BB |
221 | /* Read-only compatibility flags, upper half of inode_item::flags */ |
222 | u32 ro_flags; | |
f1bdcc0a | 223 | |
9ed74f2d | 224 | /* |
32c00aff JB |
225 | * Counters to keep track of the number of extent item's we may use due |
226 | * to delalloc and such. outstanding_extents is the number of extent | |
227 | * items we think we'll end up using, and reserved_extents is the number | |
228 | * of extent items we've reserved metadata for. | |
9ed74f2d | 229 | */ |
9e0baf60 | 230 | unsigned outstanding_extents; |
69fe2d75 JB |
231 | |
232 | struct btrfs_block_rsv block_rsv; | |
9ed74f2d | 233 | |
1e701a32 | 234 | /* |
b52aa8c9 | 235 | * Cached values of inode properties |
1e701a32 | 236 | */ |
b52aa8c9 | 237 | unsigned prop_compress; /* per-file compression algorithm */ |
eec63c65 DS |
238 | /* |
239 | * Force compression on the file using the defrag ioctl, could be | |
240 | * different from prop_compress and takes precedence if set | |
241 | */ | |
242 | unsigned defrag_compress; | |
1e701a32 | 243 | |
16cdcec7 MX |
244 | struct btrfs_delayed_node *delayed_node; |
245 | ||
9cc97d64 | 246 | /* File creation time. */ |
d3c6be6f | 247 | struct timespec64 i_otime; |
9cc97d64 | 248 | |
8089fe62 DS |
249 | /* Hook into fs_info->delayed_iputs */ |
250 | struct list_head delayed_iput; | |
8089fe62 | 251 | |
8318ba79 | 252 | struct rw_semaphore i_mmap_lock; |
d352ac68 | 253 | struct inode vfs_inode; |
2c90e5d6 | 254 | }; |
dbe674a9 | 255 | |
9a35b637 | 256 | static inline struct btrfs_inode *BTRFS_I(const struct inode *inode) |
2c90e5d6 CM |
257 | { |
258 | return container_of(inode, struct btrfs_inode, vfs_inode); | |
259 | } | |
260 | ||
778ba82b FDBM |
261 | static inline unsigned long btrfs_inode_hash(u64 objectid, |
262 | const struct btrfs_root *root) | |
263 | { | |
4fd786e6 | 264 | u64 h = objectid ^ (root->root_key.objectid * GOLDEN_RATIO_PRIME); |
778ba82b FDBM |
265 | |
266 | #if BITS_PER_LONG == 32 | |
267 | h = (h >> 32) ^ (h & 0xffffffff); | |
268 | #endif | |
269 | ||
270 | return (unsigned long)h; | |
271 | } | |
272 | ||
cf2404a9 FM |
273 | #if BITS_PER_LONG == 32 |
274 | ||
275 | /* | |
276 | * On 32 bit systems the i_ino of struct inode is 32 bits (unsigned long), so | |
277 | * we use the inode's location objectid which is a u64 to avoid truncation. | |
278 | */ | |
9a35b637 | 279 | static inline u64 btrfs_ino(const struct btrfs_inode *inode) |
33345d01 | 280 | { |
4a0cc7ca | 281 | u64 ino = inode->location.objectid; |
33345d01 | 282 | |
adac5584 FM |
283 | /* type == BTRFS_ROOT_ITEM_KEY: subvol dir */ |
284 | if (inode->location.type == BTRFS_ROOT_ITEM_KEY) | |
4a0cc7ca | 285 | ino = inode->vfs_inode.i_ino; |
33345d01 LZ |
286 | return ino; |
287 | } | |
288 | ||
cf2404a9 FM |
289 | #else |
290 | ||
291 | static inline u64 btrfs_ino(const struct btrfs_inode *inode) | |
292 | { | |
293 | return inode->vfs_inode.i_ino; | |
294 | } | |
295 | ||
296 | #endif | |
297 | ||
6ef06d27 | 298 | static inline void btrfs_i_size_write(struct btrfs_inode *inode, u64 size) |
dbe674a9 | 299 | { |
6ef06d27 NB |
300 | i_size_write(&inode->vfs_inode, size); |
301 | inode->disk_i_size = size; | |
dbe674a9 CM |
302 | } |
303 | ||
70ddc553 | 304 | static inline bool btrfs_is_free_space_inode(struct btrfs_inode *inode) |
2cf8572d | 305 | { |
9b9b8854 | 306 | return test_bit(BTRFS_INODE_FREE_SPACE_INODE, &inode->runtime_flags); |
2cf8572d CM |
307 | } |
308 | ||
06f2548f NB |
309 | static inline bool is_data_inode(struct inode *inode) |
310 | { | |
311 | return btrfs_ino(BTRFS_I(inode)) != BTRFS_BTREE_INODE_OBJECTID; | |
312 | } | |
313 | ||
8b62f87b JB |
314 | static inline void btrfs_mod_outstanding_extents(struct btrfs_inode *inode, |
315 | int mod) | |
316 | { | |
317 | lockdep_assert_held(&inode->lock); | |
318 | inode->outstanding_extents += mod; | |
319 | if (btrfs_is_free_space_inode(inode)) | |
320 | return; | |
dd48d407 JB |
321 | trace_btrfs_inode_mod_outstanding_extents(inode->root, btrfs_ino(inode), |
322 | mod); | |
8b62f87b JB |
323 | } |
324 | ||
bc0939fc FM |
325 | /* |
326 | * Called every time after doing a buffered, direct IO or memory mapped write. | |
327 | * | |
328 | * This is to ensure that if we write to a file that was previously fsynced in | |
329 | * the current transaction, then try to fsync it again in the same transaction, | |
330 | * we will know that there were changes in the file and that it needs to be | |
331 | * logged. | |
332 | */ | |
333 | static inline void btrfs_set_inode_last_sub_trans(struct btrfs_inode *inode) | |
334 | { | |
335 | spin_lock(&inode->lock); | |
336 | inode->last_sub_trans = inode->root->log_transid; | |
337 | spin_unlock(&inode->lock); | |
338 | } | |
339 | ||
23e3337f FM |
340 | /* |
341 | * Should be called while holding the inode's VFS lock in exclusive mode or in a | |
342 | * context where no one else can access the inode concurrently (during inode | |
343 | * creation or when loading an inode from disk). | |
344 | */ | |
345 | static inline void btrfs_set_inode_full_sync(struct btrfs_inode *inode) | |
346 | { | |
347 | set_bit(BTRFS_INODE_NEEDS_FULL_SYNC, &inode->runtime_flags); | |
348 | /* | |
349 | * The inode may have been part of a reflink operation in the last | |
350 | * transaction that modified it, and then a fsync has reset the | |
351 | * last_reflink_trans to avoid subsequent fsyncs in the same | |
352 | * transaction to do unnecessary work. So update last_reflink_trans | |
353 | * to the last_trans value (we have to be pessimistic and assume a | |
354 | * reflink happened). | |
355 | * | |
356 | * The ->last_trans is protected by the inode's spinlock and we can | |
357 | * have a concurrent ordered extent completion update it. Also set | |
358 | * last_reflink_trans to ->last_trans only if the former is less than | |
359 | * the later, because we can be called in a context where | |
360 | * last_reflink_trans was set to the current transaction generation | |
361 | * while ->last_trans was not yet updated in the current transaction, | |
362 | * and therefore has a lower value. | |
363 | */ | |
364 | spin_lock(&inode->lock); | |
365 | if (inode->last_reflink_trans < inode->last_trans) | |
366 | inode->last_reflink_trans = inode->last_trans; | |
367 | spin_unlock(&inode->lock); | |
368 | } | |
369 | ||
209ecbb8 | 370 | static inline bool btrfs_inode_in_log(struct btrfs_inode *inode, u64 generation) |
22ee6985 | 371 | { |
209ecbb8 | 372 | bool ret = false; |
2f2ff0ee | 373 | |
0f8939b8 NB |
374 | spin_lock(&inode->lock); |
375 | if (inode->logged_trans == generation && | |
376 | inode->last_sub_trans <= inode->last_log_commit && | |
209ecbb8 FM |
377 | inode->last_sub_trans <= inode->root->last_log_commit) |
378 | ret = true; | |
0f8939b8 | 379 | spin_unlock(&inode->lock); |
2f2ff0ee | 380 | return ret; |
22ee6985 JB |
381 | } |
382 | ||
e6f9d696 CCC |
383 | /* |
384 | * Check if the inode has flags compatible with compression | |
385 | */ | |
386 | static inline bool btrfs_inode_can_compress(const struct btrfs_inode *inode) | |
387 | { | |
388 | if (inode->flags & BTRFS_INODE_NODATACOW || | |
389 | inode->flags & BTRFS_INODE_NODATASUM) | |
390 | return false; | |
391 | return true; | |
392 | } | |
393 | ||
77eea05e BB |
394 | /* |
395 | * btrfs_inode_item stores flags in a u64, btrfs_inode stores them in two | |
396 | * separate u32s. These two functions convert between the two representations. | |
397 | */ | |
398 | static inline u64 btrfs_inode_combine_flags(u32 flags, u32 ro_flags) | |
399 | { | |
400 | return (flags | ((u64)ro_flags << 32)); | |
401 | } | |
402 | ||
403 | static inline void btrfs_inode_split_flags(u64 inode_item_flags, | |
404 | u32 *flags, u32 *ro_flags) | |
405 | { | |
406 | *flags = (u32)inode_item_flags; | |
407 | *ro_flags = (u32)(inode_item_flags >> 32); | |
408 | } | |
409 | ||
7ebc7e5f JT |
410 | /* Array of bytes with variable length, hexadecimal format 0x1234 */ |
411 | #define CSUM_FMT "0x%*phN" | |
412 | #define CSUM_FMT_VALUE(size, bytes) size, bytes | |
2885fd63 | 413 | |
535a7e5d | 414 | void btrfs_submit_data_write_bio(struct btrfs_inode *inode, struct bio *bio, int mirror_num); |
b7620416 | 415 | void btrfs_submit_data_read_bio(struct btrfs_inode *inode, struct bio *bio, |
2885fd63 | 416 | int mirror_num, enum btrfs_compression_type compress_type); |
7920b773 | 417 | void btrfs_submit_dio_repair_bio(struct inode *inode, struct bio *bio, int mirror_num); |
882681ac | 418 | blk_status_t btrfs_submit_bio_start(struct btrfs_inode *inode, struct bio *bio); |
bfa17066 | 419 | blk_status_t btrfs_submit_bio_start_direct_io(struct btrfs_inode *inode, |
ab2072b2 DS |
420 | struct bio *bio, |
421 | u64 dio_file_offset); | |
2885fd63 JB |
422 | int btrfs_check_sector_csum(struct btrfs_fs_info *fs_info, struct page *page, |
423 | u32 pgoff, u8 *csum, const u8 * const csum_expected); | |
424 | int btrfs_check_data_csum(struct inode *inode, struct btrfs_bio *bbio, | |
425 | u32 bio_offset, struct page *page, u32 pgoff); | |
426 | unsigned int btrfs_verify_data_csum(struct btrfs_bio *bbio, | |
427 | u32 bio_offset, struct page *page, | |
428 | u64 start, u64 end); | |
429 | int btrfs_check_data_csum(struct inode *inode, struct btrfs_bio *bbio, | |
430 | u32 bio_offset, struct page *page, u32 pgoff); | |
431 | noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len, | |
432 | u64 *orig_start, u64 *orig_block_len, | |
433 | u64 *ram_bytes, bool nowait, bool strict); | |
434 | ||
435 | void __btrfs_del_delalloc_inode(struct btrfs_root *root, struct btrfs_inode *inode); | |
436 | struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry); | |
437 | int btrfs_set_inode_index(struct btrfs_inode *dir, u64 *index); | |
438 | int btrfs_unlink_inode(struct btrfs_trans_handle *trans, | |
439 | struct btrfs_inode *dir, struct btrfs_inode *inode, | |
440 | const struct fscrypt_str *name); | |
441 | int btrfs_add_link(struct btrfs_trans_handle *trans, | |
442 | struct btrfs_inode *parent_inode, struct btrfs_inode *inode, | |
443 | const struct fscrypt_str *name, int add_backref, u64 index); | |
444 | int btrfs_delete_subvolume(struct inode *dir, struct dentry *dentry); | |
445 | int btrfs_truncate_block(struct btrfs_inode *inode, loff_t from, loff_t len, | |
446 | int front); | |
447 | ||
448 | int btrfs_start_delalloc_snapshot(struct btrfs_root *root, bool in_reclaim_context); | |
449 | int btrfs_start_delalloc_roots(struct btrfs_fs_info *fs_info, long nr, | |
450 | bool in_reclaim_context); | |
451 | int btrfs_set_extent_delalloc(struct btrfs_inode *inode, u64 start, u64 end, | |
452 | unsigned int extra_bits, | |
453 | struct extent_state **cached_state); | |
454 | ||
455 | struct btrfs_new_inode_args { | |
456 | /* Input */ | |
457 | struct inode *dir; | |
458 | struct dentry *dentry; | |
459 | struct inode *inode; | |
460 | bool orphan; | |
461 | bool subvol; | |
462 | ||
463 | /* Output from btrfs_new_inode_prepare(), input to btrfs_create_new_inode(). */ | |
464 | struct posix_acl *default_acl; | |
465 | struct posix_acl *acl; | |
466 | struct fscrypt_name fname; | |
467 | }; | |
468 | ||
469 | int btrfs_new_inode_prepare(struct btrfs_new_inode_args *args, | |
470 | unsigned int *trans_num_items); | |
471 | int btrfs_create_new_inode(struct btrfs_trans_handle *trans, | |
472 | struct btrfs_new_inode_args *args); | |
473 | void btrfs_new_inode_args_destroy(struct btrfs_new_inode_args *args); | |
474 | struct inode *btrfs_new_subvol_inode(struct user_namespace *mnt_userns, | |
475 | struct inode *dir); | |
476 | void btrfs_set_delalloc_extent(struct inode *inode, struct extent_state *state, | |
477 | u32 bits); | |
478 | void btrfs_clear_delalloc_extent(struct inode *inode, | |
479 | struct extent_state *state, u32 bits); | |
480 | void btrfs_merge_delalloc_extent(struct inode *inode, struct extent_state *new, | |
481 | struct extent_state *other); | |
482 | void btrfs_split_delalloc_extent(struct inode *inode, | |
483 | struct extent_state *orig, u64 split); | |
484 | void btrfs_set_range_writeback(struct btrfs_inode *inode, u64 start, u64 end); | |
485 | vm_fault_t btrfs_page_mkwrite(struct vm_fault *vmf); | |
486 | void btrfs_evict_inode(struct inode *inode); | |
487 | struct inode *btrfs_alloc_inode(struct super_block *sb); | |
488 | void btrfs_destroy_inode(struct inode *inode); | |
489 | void btrfs_free_inode(struct inode *inode); | |
490 | int btrfs_drop_inode(struct inode *inode); | |
491 | int __init btrfs_init_cachep(void); | |
492 | void __cold btrfs_destroy_cachep(void); | |
493 | struct inode *btrfs_iget_path(struct super_block *s, u64 ino, | |
494 | struct btrfs_root *root, struct btrfs_path *path); | |
495 | struct inode *btrfs_iget(struct super_block *s, u64 ino, struct btrfs_root *root); | |
496 | struct extent_map *btrfs_get_extent(struct btrfs_inode *inode, | |
497 | struct page *page, size_t pg_offset, | |
498 | u64 start, u64 end); | |
499 | int btrfs_update_inode(struct btrfs_trans_handle *trans, | |
500 | struct btrfs_root *root, struct btrfs_inode *inode); | |
501 | int btrfs_update_inode_fallback(struct btrfs_trans_handle *trans, | |
502 | struct btrfs_root *root, struct btrfs_inode *inode); | |
503 | int btrfs_orphan_add(struct btrfs_trans_handle *trans, struct btrfs_inode *inode); | |
504 | int btrfs_orphan_cleanup(struct btrfs_root *root); | |
505 | int btrfs_cont_expand(struct btrfs_inode *inode, loff_t oldsize, loff_t size); | |
506 | void btrfs_add_delayed_iput(struct inode *inode); | |
507 | void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info); | |
508 | int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info); | |
509 | int btrfs_prealloc_file_range(struct inode *inode, int mode, | |
510 | u64 start, u64 num_bytes, u64 min_size, | |
511 | loff_t actual_len, u64 *alloc_hint); | |
512 | int btrfs_prealloc_file_range_trans(struct inode *inode, | |
513 | struct btrfs_trans_handle *trans, int mode, | |
514 | u64 start, u64 num_bytes, u64 min_size, | |
515 | loff_t actual_len, u64 *alloc_hint); | |
516 | int btrfs_run_delalloc_range(struct btrfs_inode *inode, struct page *locked_page, | |
517 | u64 start, u64 end, int *page_started, | |
518 | unsigned long *nr_written, struct writeback_control *wbc); | |
519 | int btrfs_writepage_cow_fixup(struct page *page); | |
520 | void btrfs_writepage_endio_finish_ordered(struct btrfs_inode *inode, | |
521 | struct page *page, u64 start, | |
522 | u64 end, bool uptodate); | |
523 | int btrfs_encoded_io_compression_from_extent(struct btrfs_fs_info *fs_info, | |
524 | int compress_type); | |
525 | int btrfs_encoded_read_regular_fill_pages(struct btrfs_inode *inode, | |
526 | u64 file_offset, u64 disk_bytenr, | |
527 | u64 disk_io_size, | |
528 | struct page **pages); | |
529 | ssize_t btrfs_encoded_read(struct kiocb *iocb, struct iov_iter *iter, | |
530 | struct btrfs_ioctl_encoded_io_args *encoded); | |
531 | ssize_t btrfs_do_encoded_write(struct kiocb *iocb, struct iov_iter *from, | |
532 | const struct btrfs_ioctl_encoded_io_args *encoded); | |
533 | ||
534 | ssize_t btrfs_dio_read(struct kiocb *iocb, struct iov_iter *iter, | |
535 | size_t done_before); | |
536 | struct iomap_dio *btrfs_dio_write(struct kiocb *iocb, struct iov_iter *iter, | |
537 | size_t done_before); | |
538 | ||
539 | extern const struct dentry_operations btrfs_dentry_operations; | |
540 | ||
541 | /* Inode locking type flags, by default the exclusive lock is taken. */ | |
542 | enum btrfs_ilock_type { | |
543 | ENUM_BIT(BTRFS_ILOCK_SHARED), | |
544 | ENUM_BIT(BTRFS_ILOCK_TRY), | |
545 | ENUM_BIT(BTRFS_ILOCK_MMAP), | |
546 | }; | |
547 | ||
548 | int btrfs_inode_lock(struct inode *inode, unsigned int ilock_flags); | |
549 | void btrfs_inode_unlock(struct inode *inode, unsigned int ilock_flags); | |
550 | void btrfs_update_inode_bytes(struct btrfs_inode *inode, const u64 add_bytes, | |
551 | const u64 del_bytes); | |
552 | void btrfs_assert_inode_range_clean(struct btrfs_inode *inode, u64 start, u64 end); | |
553 | ||
2c90e5d6 | 554 | #endif |