1 /* SPDX-License-Identifier: GPL-2.0 */
2
3 #ifndef BTRFS_EXTENT_IO_TREE_H
4 #define BTRFS_EXTENT_IO_TREE_H
5
6 struct extent_changeset;
7 struct 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_NORESERVE (1U << 11)
21 #define EXTENT_QGROUP_RESERVED (1U << 12)
22 #define EXTENT_CLEAR_DATA_RESV (1U << 13)
23 /*
24 * Must be cleared only during ordered extent completion or on error paths if we
25 * did not manage to submit bios and create the ordered extents for the range.
26 * Should not be cleared during page release and page invalidation (if there is
27 * an ordered extent in flight), that is left for the ordered extent completion.
28 */
29 #define EXTENT_DELALLOC_NEW (1U << 14)
30 /*
31 * When an ordered extent successfully completes for a region marked as a new
32 * delalloc range, use this flag when clearing a new delalloc range to indicate
33 * that the VFS' inode number of bytes should be incremented and the inode's new
34 * delalloc bytes decremented, in an atomic way to prevent races with stat(2).
35 */
36 #define EXTENT_ADD_INODE_BYTES (1U << 15)
37
38 /*
39 * Set during truncate when we're clearing an entire range and we just want the
40 * extent states to go away.
41 */
42 #define EXTENT_CLEAR_ALL_BITS (1U << 16)
43
44 #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
45 EXTENT_CLEAR_DATA_RESV)
46 #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
47 EXTENT_ADD_INODE_BYTES | \
48 EXTENT_CLEAR_ALL_BITS)
49
50 /*
51 * Redefined bits above which are used only in the device allocation tree,
52 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
53 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
54 * manipulation functions
55 */
56 #define CHUNK_ALLOCATED EXTENT_DIRTY
57 #define CHUNK_TRIMMED EXTENT_DEFRAG
58 #define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
59 CHUNK_TRIMMED)
60
61 enum {
62 IO_TREE_FS_PINNED_EXTENTS,
63 IO_TREE_FS_EXCLUDED_EXTENTS,
64 IO_TREE_BTREE_INODE_IO,
65 IO_TREE_INODE_IO,
66 IO_TREE_RELOC_BLOCKS,
67 IO_TREE_TRANS_DIRTY_PAGES,
68 IO_TREE_ROOT_DIRTY_LOG_PAGES,
69 IO_TREE_INODE_FILE_EXTENT,
70 IO_TREE_LOG_CSUM_RANGE,
71 IO_TREE_SELFTEST,
72 IO_TREE_DEVICE_ALLOC_STATE,
73 };
74
75 struct extent_io_tree {
76 struct rb_root state;
77 struct btrfs_fs_info *fs_info;
78 void *private_data;
79
80 /* Who owns this io tree, should be one of IO_TREE_* */
81 u8 owner;
82
83 spinlock_t lock;
84 };
85
86 struct extent_state {
87 u64 start;
88 u64 end; /* inclusive */
89 struct rb_node rb_node;
90
91 /* ADD NEW ELEMENTS AFTER THIS */
92 wait_queue_head_t wq;
93 refcount_t refs;
94 u32 state;
95
96 #ifdef CONFIG_BTRFS_DEBUG
97 struct list_head leak_list;
98 #endif
99 };
100
101 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
102 struct extent_io_tree *tree, unsigned int owner,
103 void *private_data);
104 void extent_io_tree_release(struct extent_io_tree *tree);
105
106 int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
107 struct extent_state **cached);
108
109 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
110
111 int __init extent_state_init_cachep(void);
112 void __cold extent_state_free_cachep(void);
113
114 u64 count_range_bits(struct extent_io_tree *tree,
115 u64 *start, u64 search_end,
116 u64 max_bytes, u32 bits, int contig);
117
118 void free_extent_state(struct extent_state *state);
119 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
120 u32 bits, int filled, struct extent_state *cached_state);
121 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
122 u32 bits, struct extent_changeset *changeset);
123 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
124 u32 bits, struct extent_state **cached, gfp_t mask,
125 struct extent_changeset *changeset);
126
clear_extent_bit(struct extent_io_tree * tree,u64 start,u64 end,u32 bits,struct extent_state ** cached)127 static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
128 u64 end, u32 bits,
129 struct extent_state **cached)
130 {
131 return __clear_extent_bit(tree, start, end, bits, cached,
132 GFP_NOFS, NULL);
133 }
134
unlock_extent(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)135 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
136 struct extent_state **cached)
137 {
138 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached,
139 GFP_NOFS, NULL);
140 }
141
unlock_extent_atomic(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)142 static inline int unlock_extent_atomic(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, cached,
146 GFP_ATOMIC, NULL);
147 }
148
clear_extent_bits(struct extent_io_tree * tree,u64 start,u64 end,u32 bits)149 static 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
155 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
156 u32 bits, struct extent_changeset *changeset);
157 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
158 u32 bits, struct extent_state **cached_state, gfp_t mask);
159
set_extent_bits_nowait(struct extent_io_tree * tree,u64 start,u64 end,u32 bits)160 static 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
set_extent_bits(struct extent_io_tree * tree,u64 start,u64 end,u32 bits)166 static 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
clear_extent_uptodate(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state)172 static 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
set_extent_dirty(struct extent_io_tree * tree,u64 start,u64 end,gfp_t mask)179 static 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
clear_extent_dirty(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached)185 static 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
193 int 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
set_extent_delalloc(struct extent_io_tree * tree,u64 start,u64 end,u32 extra_bits,struct extent_state ** cached_state)197 static 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
set_extent_defrag(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state)206 static 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
set_extent_new(struct extent_io_tree * tree,u64 start,u64 end)214 static 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
set_extent_uptodate(struct extent_io_tree * tree,u64 start,u64 end,struct extent_state ** cached_state,gfp_t mask)220 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
221 u64 end, struct extent_state **cached_state, gfp_t mask)
222 {
223 return set_extent_bit(tree, start, end, EXTENT_UPTODATE,
224 cached_state, mask);
225 }
226
227 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
228 u64 *start_ret, u64 *end_ret, u32 bits,
229 struct extent_state **cached_state);
230 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
231 u64 *start_ret, u64 *end_ret, u32 bits);
232 int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
233 u64 *start_ret, u64 *end_ret, u32 bits);
234 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
235 u64 *end, u64 max_bytes,
236 struct extent_state **cached_state);
237 void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bits);
238
239 #endif /* BTRFS_EXTENT_IO_TREE_H */
240