1 /* SPDX-License-Identifier: GPL-2.0 */
3 #ifndef BTRFS_EXTENT_IO_TREE_H
4 #define BTRFS_EXTENT_IO_TREE_H
6 struct extent_changeset;
7 struct io_failure_record;
9 /* Bits for the extent state */
10 #define EXTENT_DIRTY (1U << 0)
11 #define EXTENT_UPTODATE (1U << 1)
12 #define EXTENT_LOCKED (1U << 2)
13 #define EXTENT_NEW (1U << 3)
14 #define EXTENT_DELALLOC (1U << 4)
15 #define EXTENT_DEFRAG (1U << 5)
16 #define EXTENT_BOUNDARY (1U << 6)
17 #define EXTENT_NODATASUM (1U << 7)
18 #define EXTENT_CLEAR_META_RESV (1U << 8)
19 #define EXTENT_NEED_WAIT (1U << 9)
20 #define EXTENT_DAMAGED (1U << 10)
21 #define EXTENT_NORESERVE (1U << 11)
22 #define EXTENT_QGROUP_RESERVED (1U << 12)
23 #define EXTENT_CLEAR_DATA_RESV (1U << 13)
25 * Must be cleared only during ordered extent completion or on error paths if we
26 * did not manage to submit bios and create the ordered extents for the range.
27 * Should not be cleared during page release and page invalidation (if there is
28 * an ordered extent in flight), that is left for the ordered extent completion.
30 #define EXTENT_DELALLOC_NEW (1U << 14)
32 * When an ordered extent successfully completes for a region marked as a new
33 * delalloc range, use this flag when clearing a new delalloc range to indicate
34 * that the VFS' inode number of bytes should be incremented and the inode's new
35 * delalloc bytes decremented, in an atomic way to prevent races with stat(2).
37 #define EXTENT_ADD_INODE_BYTES (1U << 15)
38 #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
39 EXTENT_CLEAR_DATA_RESV)
40 #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
41 EXTENT_ADD_INODE_BYTES)
44 * Redefined bits above which are used only in the device allocation tree,
45 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
46 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
47 * manipulation functions
49 #define CHUNK_ALLOCATED EXTENT_DIRTY
50 #define CHUNK_TRIMMED EXTENT_DEFRAG
51 #define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
55 IO_TREE_FS_PINNED_EXTENTS,
56 IO_TREE_FS_EXCLUDED_EXTENTS,
57 IO_TREE_BTREE_INODE_IO,
59 IO_TREE_INODE_IO_FAILURE,
61 IO_TREE_TRANS_DIRTY_PAGES,
62 IO_TREE_ROOT_DIRTY_LOG_PAGES,
63 IO_TREE_INODE_FILE_EXTENT,
64 IO_TREE_LOG_CSUM_RANGE,
66 IO_TREE_DEVICE_ALLOC_STATE,
69 struct extent_io_tree {
71 struct btrfs_fs_info *fs_info;
76 /* Who owns this io tree, should be one of IO_TREE_* */
84 u64 end; /* inclusive */
85 struct rb_node rb_node;
87 /* ADD NEW ELEMENTS AFTER THIS */
92 struct io_failure_record *failrec;
94 #ifdef CONFIG_BTRFS_DEBUG
95 struct list_head leak_list;
99 int __init extent_state_cache_init(void);
100 void __cold extent_state_cache_exit(void);
102 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
103 struct extent_io_tree *tree, unsigned int owner,
105 void extent_io_tree_release(struct extent_io_tree *tree);
107 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
108 struct extent_state **cached);
110 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
112 return lock_extent_bits(tree, start, end, NULL);
115 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
117 int __init extent_io_init(void);
118 void __cold extent_io_exit(void);
120 u64 count_range_bits(struct extent_io_tree *tree,
121 u64 *start, u64 search_end,
122 u64 max_bytes, u32 bits, int contig);
124 void free_extent_state(struct extent_state *state);
125 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
126 u32 bits, int filled, struct extent_state *cached_state);
127 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
128 u32 bits, struct extent_changeset *changeset);
129 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
130 u32 bits, int wake, int delete,
131 struct extent_state **cached);
132 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
133 u32 bits, int wake, int delete,
134 struct extent_state **cached, gfp_t mask,
135 struct extent_changeset *changeset);
137 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
139 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
142 static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
143 u64 end, struct extent_state **cached)
145 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
149 static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree,
150 u64 start, u64 end, struct extent_state **cached)
152 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
156 static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
161 if (bits & EXTENT_LOCKED)
164 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL);
167 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
168 u32 bits, struct extent_changeset *changeset);
169 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
170 u32 bits, unsigned exclusive_bits, u64 *failed_start,
171 struct extent_state **cached_state, gfp_t mask,
172 struct extent_changeset *changeset);
173 int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
176 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
179 return set_extent_bit(tree, start, end, bits, 0, NULL, NULL, GFP_NOFS,
183 static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
184 u64 end, struct extent_state **cached_state)
186 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
187 cached_state, GFP_NOFS, NULL);
190 static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
193 return set_extent_bit(tree, start, end, EXTENT_DIRTY, 0, NULL, NULL,
197 static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
198 u64 end, struct extent_state **cached)
200 return clear_extent_bit(tree, start, end,
201 EXTENT_DIRTY | EXTENT_DELALLOC |
202 EXTENT_DO_ACCOUNTING, 0, 0, cached);
205 int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
206 u32 bits, u32 clear_bits,
207 struct extent_state **cached_state);
209 static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
210 u64 end, u32 extra_bits,
211 struct extent_state **cached_state)
213 return set_extent_bit(tree, start, end,
214 EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits,
215 0, NULL, cached_state, GFP_NOFS, NULL);
218 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
219 u64 end, struct extent_state **cached_state)
221 return set_extent_bit(tree, start, end,
222 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
223 0, NULL, cached_state, GFP_NOFS, NULL);
226 static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
229 return set_extent_bit(tree, start, end, EXTENT_NEW, 0, NULL, NULL,
233 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
234 u64 end, struct extent_state **cached_state, gfp_t mask)
236 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, NULL,
237 cached_state, mask, NULL);
240 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
241 u64 *start_ret, u64 *end_ret, u32 bits,
242 struct extent_state **cached_state);
243 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
244 u64 *start_ret, u64 *end_ret, u32 bits);
245 int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
246 u64 *start_ret, u64 *end_ret, u32 bits);
247 int extent_invalidate_folio(struct extent_io_tree *tree,
248 struct folio *folio, size_t offset);
249 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
250 u64 *end, u64 max_bytes,
251 struct extent_state **cached_state);
253 /* This should be reworked in the future and put elsewhere. */
254 struct io_failure_record *get_state_failrec(struct extent_io_tree *tree, u64 start);
255 int set_state_failrec(struct extent_io_tree *tree, u64 start,
256 struct io_failure_record *failrec);
257 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
259 int free_io_failure(struct extent_io_tree *failure_tree,
260 struct extent_io_tree *io_tree,
261 struct io_failure_record *rec);
262 int clean_io_failure(struct btrfs_fs_info *fs_info,
263 struct extent_io_tree *failure_tree,
264 struct extent_io_tree *io_tree, u64 start,
265 struct page *page, u64 ino, unsigned int pg_offset);
267 #endif /* BTRFS_EXTENT_IO_TREE_H */