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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_EXTENT_IO_TREE_H
4#define BTRFS_EXTENT_IO_TREE_H
5
6#include "misc.h"
7
8struct extent_changeset;
9struct io_failure_record;
10
11/* Bits for the extent state */
12enum {
13 ENUM_BIT(EXTENT_DIRTY),
14 ENUM_BIT(EXTENT_UPTODATE),
15 ENUM_BIT(EXTENT_LOCKED),
16 ENUM_BIT(EXTENT_NEW),
17 ENUM_BIT(EXTENT_DELALLOC),
18 ENUM_BIT(EXTENT_DEFRAG),
19 ENUM_BIT(EXTENT_BOUNDARY),
20 ENUM_BIT(EXTENT_NODATASUM),
21 ENUM_BIT(EXTENT_CLEAR_META_RESV),
22 ENUM_BIT(EXTENT_NEED_WAIT),
23 ENUM_BIT(EXTENT_NORESERVE),
24 ENUM_BIT(EXTENT_QGROUP_RESERVED),
25 ENUM_BIT(EXTENT_CLEAR_DATA_RESV),
26 /*
27 * Must be cleared only during ordered extent completion or on error
28 * paths if we did not manage to submit bios and create the ordered
29 * extents for the range. Should not be cleared during page release
30 * and page invalidation (if there is an ordered extent in flight),
31 * that is left for the ordered extent completion.
32 */
33 ENUM_BIT(EXTENT_DELALLOC_NEW),
34 /*
35 * When an ordered extent successfully completes for a region marked as
36 * a new delalloc range, use this flag when clearing a new delalloc
37 * range to indicate that the VFS' inode number of bytes should be
38 * incremented and the inode's new delalloc bytes decremented, in an
39 * atomic way to prevent races with stat(2).
40 */
41 ENUM_BIT(EXTENT_ADD_INODE_BYTES),
42 /*
43 * Set during truncate when we're clearing an entire range and we just
44 * want the extent states to go away.
45 */
46 ENUM_BIT(EXTENT_CLEAR_ALL_BITS),
47};
48
49#define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
50 EXTENT_CLEAR_DATA_RESV)
51#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
52 EXTENT_ADD_INODE_BYTES | \
53 EXTENT_CLEAR_ALL_BITS)
54
55/*
56 * Redefined bits above which are used only in the device allocation tree,
57 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
58 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
59 * manipulation functions
60 */
61#define CHUNK_ALLOCATED EXTENT_DIRTY
62#define CHUNK_TRIMMED EXTENT_DEFRAG
63#define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
64 CHUNK_TRIMMED)
65
66enum {
67 IO_TREE_FS_PINNED_EXTENTS,
68 IO_TREE_FS_EXCLUDED_EXTENTS,
69 IO_TREE_BTREE_INODE_IO,
70 IO_TREE_INODE_IO,
71 IO_TREE_RELOC_BLOCKS,
72 IO_TREE_TRANS_DIRTY_PAGES,
73 IO_TREE_ROOT_DIRTY_LOG_PAGES,
74 IO_TREE_INODE_FILE_EXTENT,
75 IO_TREE_LOG_CSUM_RANGE,
76 IO_TREE_SELFTEST,
77 IO_TREE_DEVICE_ALLOC_STATE,
78};
79
80struct extent_io_tree {
81 struct rb_root state;
82 struct btrfs_fs_info *fs_info;
83 /* Inode associated with this tree, or NULL. */
84 struct btrfs_inode *inode;
85
86 /* Who owns this io tree, should be one of IO_TREE_* */
87 u8 owner;
88
89 spinlock_t lock;
90};
91
92struct extent_state {
93 u64 start;
94 u64 end; /* inclusive */
95 struct rb_node rb_node;
96
97 /* ADD NEW ELEMENTS AFTER THIS */
98 wait_queue_head_t wq;
99 refcount_t refs;
100 u32 state;
101
102#ifdef CONFIG_BTRFS_DEBUG
103 struct list_head leak_list;
104#endif
105};
106
107void extent_io_tree_init(struct btrfs_fs_info *fs_info,
108 struct extent_io_tree *tree, unsigned int owner);
109void extent_io_tree_release(struct extent_io_tree *tree);
110
111int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
112 struct extent_state **cached);
113
114int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
115 struct extent_state **cached);
116
117int __init extent_state_init_cachep(void);
118void __cold extent_state_free_cachep(void);
119
120u64 count_range_bits(struct extent_io_tree *tree,
121 u64 *start, u64 search_end,
122 u64 max_bytes, u32 bits, int contig,
123 struct extent_state **cached_state);
124
125void free_extent_state(struct extent_state *state);
126int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
127 u32 bits, int filled, struct extent_state *cached_state);
128int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
129 u32 bits, struct extent_changeset *changeset);
130int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
131 u32 bits, struct extent_state **cached, gfp_t mask,
132 struct extent_changeset *changeset);
133
134static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
135 u64 end, u32 bits,
136 struct extent_state **cached)
137{
138 return __clear_extent_bit(tree, start, end, bits, cached,
139 GFP_NOFS, NULL);
140}
141
142static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
143 struct extent_state **cached)
144{
145 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached,
146 GFP_NOFS, NULL);
147}
148
149static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
150 u64 end, u32 bits)
151{
152 return clear_extent_bit(tree, start, end, bits, NULL);
153}
154
155int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
156 u32 bits, struct extent_changeset *changeset);
157int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
158 u32 bits, struct extent_state **cached_state, gfp_t mask);
159
160static inline int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start,
161 u64 end, u32 bits)
162{
163 return set_extent_bit(tree, start, end, bits, NULL, GFP_NOWAIT);
164}
165
166static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
167 u64 end, u32 bits)
168{
169 return set_extent_bit(tree, start, end, bits, NULL, GFP_NOFS);
170}
171
172static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
173 u64 end, struct extent_state **cached_state)
174{
175 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE,
176 cached_state, GFP_NOFS, NULL);
177}
178
179static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
180 u64 end, gfp_t mask)
181{
182 return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, mask);
183}
184
185static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
186 u64 end, struct extent_state **cached)
187{
188 return clear_extent_bit(tree, start, end,
189 EXTENT_DIRTY | EXTENT_DELALLOC |
190 EXTENT_DO_ACCOUNTING, cached);
191}
192
193int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
194 u32 bits, u32 clear_bits,
195 struct extent_state **cached_state);
196
197static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
198 u64 end, u32 extra_bits,
199 struct extent_state **cached_state)
200{
201 return set_extent_bit(tree, start, end,
202 EXTENT_DELALLOC | extra_bits,
203 cached_state, GFP_NOFS);
204}
205
206static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
207 u64 end, struct extent_state **cached_state)
208{
209 return set_extent_bit(tree, start, end,
210 EXTENT_DELALLOC | EXTENT_DEFRAG,
211 cached_state, GFP_NOFS);
212}
213
214static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
215 u64 end)
216{
217 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, GFP_NOFS);
218}
219
220int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
221 u64 *start_ret, u64 *end_ret, u32 bits,
222 struct extent_state **cached_state);
223void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
224 u64 *start_ret, u64 *end_ret, u32 bits);
225int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
226 u64 *start_ret, u64 *end_ret, u32 bits);
227bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
228 u64 *end, u64 max_bytes,
229 struct extent_state **cached_state);
230void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bits,
231 struct extent_state **cached_state);
232
233#endif /* BTRFS_EXTENT_IO_TREE_H */
1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef BTRFS_EXTENT_IO_TREE_H
4#define BTRFS_EXTENT_IO_TREE_H
5
6struct extent_changeset;
7struct io_failure_record;
8
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)
24/*
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.
29 */
30#define EXTENT_DELALLOC_NEW (1U << 14)
31/*
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).
36 */
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)
42
43/*
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
48 */
49#define CHUNK_ALLOCATED EXTENT_DIRTY
50#define CHUNK_TRIMMED EXTENT_DEFRAG
51#define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
52 CHUNK_TRIMMED)
53
54enum {
55 IO_TREE_FS_PINNED_EXTENTS,
56 IO_TREE_FS_EXCLUDED_EXTENTS,
57 IO_TREE_BTREE_INODE_IO,
58 IO_TREE_INODE_IO,
59 IO_TREE_INODE_IO_FAILURE,
60 IO_TREE_RELOC_BLOCKS,
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,
65 IO_TREE_SELFTEST,
66 IO_TREE_DEVICE_ALLOC_STATE,
67};
68
69struct extent_io_tree {
70 struct rb_root state;
71 struct btrfs_fs_info *fs_info;
72 void *private_data;
73 u64 dirty_bytes;
74 bool track_uptodate;
75
76 /* Who owns this io tree, should be one of IO_TREE_* */
77 u8 owner;
78
79 spinlock_t lock;
80};
81
82struct extent_state {
83 u64 start;
84 u64 end; /* inclusive */
85 struct rb_node rb_node;
86
87 /* ADD NEW ELEMENTS AFTER THIS */
88 wait_queue_head_t wq;
89 refcount_t refs;
90 u32 state;
91
92 struct io_failure_record *failrec;
93
94#ifdef CONFIG_BTRFS_DEBUG
95 struct list_head leak_list;
96#endif
97};
98
99int __init extent_state_cache_init(void);
100void __cold extent_state_cache_exit(void);
101
102void extent_io_tree_init(struct btrfs_fs_info *fs_info,
103 struct extent_io_tree *tree, unsigned int owner,
104 void *private_data);
105void extent_io_tree_release(struct extent_io_tree *tree);
106
107int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
108 struct extent_state **cached);
109
110static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
111{
112 return lock_extent_bits(tree, start, end, NULL);
113}
114
115int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
116
117int __init extent_io_init(void);
118void __cold extent_io_exit(void);
119
120u64 count_range_bits(struct extent_io_tree *tree,
121 u64 *start, u64 search_end,
122 u64 max_bytes, u32 bits, int contig);
123
124void free_extent_state(struct extent_state *state);
125int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
126 u32 bits, int filled, struct extent_state *cached_state);
127int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
128 u32 bits, struct extent_changeset *changeset);
129int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
130 u32 bits, int wake, int delete,
131 struct extent_state **cached);
132int __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);
136
137static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
138{
139 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
140}
141
142static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
143 u64 end, struct extent_state **cached)
144{
145 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
146 GFP_NOFS, NULL);
147}
148
149static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree,
150 u64 start, u64 end, struct extent_state **cached)
151{
152 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
153 GFP_ATOMIC, NULL);
154}
155
156static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
157 u64 end, u32 bits)
158{
159 int wake = 0;
160
161 if (bits & EXTENT_LOCKED)
162 wake = 1;
163
164 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL);
165}
166
167int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
168 u32 bits, struct extent_changeset *changeset);
169int 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);
173int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
174 u32 bits);
175
176static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
177 u64 end, u32 bits)
178{
179 return set_extent_bit(tree, start, end, bits, 0, NULL, NULL, GFP_NOFS,
180 NULL);
181}
182
183static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
184 u64 end, struct extent_state **cached_state)
185{
186 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
187 cached_state, GFP_NOFS, NULL);
188}
189
190static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
191 u64 end, gfp_t mask)
192{
193 return set_extent_bit(tree, start, end, EXTENT_DIRTY, 0, NULL, NULL,
194 mask, NULL);
195}
196
197static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
198 u64 end, struct extent_state **cached)
199{
200 return clear_extent_bit(tree, start, end,
201 EXTENT_DIRTY | EXTENT_DELALLOC |
202 EXTENT_DO_ACCOUNTING, 0, 0, cached);
203}
204
205int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
206 u32 bits, u32 clear_bits,
207 struct extent_state **cached_state);
208
209static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
210 u64 end, u32 extra_bits,
211 struct extent_state **cached_state)
212{
213 return set_extent_bit(tree, start, end,
214 EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits,
215 0, NULL, cached_state, GFP_NOFS, NULL);
216}
217
218static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
219 u64 end, struct extent_state **cached_state)
220{
221 return set_extent_bit(tree, start, end,
222 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
223 0, NULL, cached_state, GFP_NOFS, NULL);
224}
225
226static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
227 u64 end)
228{
229 return set_extent_bit(tree, start, end, EXTENT_NEW, 0, NULL, NULL,
230 GFP_NOFS, NULL);
231}
232
233static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
234 u64 end, struct extent_state **cached_state, gfp_t mask)
235{
236 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, NULL,
237 cached_state, mask, NULL);
238}
239
240int 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);
243void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
244 u64 *start_ret, u64 *end_ret, u32 bits);
245int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
246 u64 *start_ret, u64 *end_ret, u32 bits);
247int extent_invalidatepage(struct extent_io_tree *tree,
248 struct page *page, unsigned long offset);
249bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
250 u64 *end, u64 max_bytes,
251 struct extent_state **cached_state);
252
253/* This should be reworked in the future and put elsewhere. */
254struct io_failure_record *get_state_failrec(struct extent_io_tree *tree, u64 start);
255int set_state_failrec(struct extent_io_tree *tree, u64 start,
256 struct io_failure_record *failrec);
257void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
258 u64 end);
259int free_io_failure(struct extent_io_tree *failure_tree,
260 struct extent_io_tree *io_tree,
261 struct io_failure_record *rec);
262int 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);
266
267#endif /* BTRFS_EXTENT_IO_TREE_H */