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_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 54 enum { 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 69 struct 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 82 struct 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 99 int __init extent_state_cache_init(void); 100 void __cold extent_state_cache_exit(void); 101 102 void extent_io_tree_init(struct btrfs_fs_info *fs_info, 103 struct extent_io_tree *tree, unsigned int owner, 104 void *private_data); 105 void extent_io_tree_release(struct extent_io_tree *tree); 106 107 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 108 struct extent_state **cached); 109 110 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) 111 { 112 return lock_extent_bits(tree, start, end, NULL); 113 } 114 115 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); 116 117 int __init extent_io_init(void); 118 void __cold extent_io_exit(void); 119 120 u64 count_range_bits(struct extent_io_tree *tree, 121 u64 *start, u64 search_end, 122 u64 max_bytes, u32 bits, int contig); 123 124 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); 136 137 static 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 } 141 142 static 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 } 148 149 static 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 } 155 156 static 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 } 166 167 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, 174 u32 bits); 175 176 static 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 } 182 183 static 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 } 189 190 static 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 } 196 197 static 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 } 204 205 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); 208 209 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) 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 } 217 218 static 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 } 225 226 static 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 } 232 233 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, 234 u64 end, struct extent_state **cached_state, gfp_t mask) 235 { 236 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, NULL, 237 cached_state, mask, NULL); 238 } 239 240 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_invalidatepage(struct extent_io_tree *tree, 248 struct page *page, unsigned long 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); 252 253 /* 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, 258 u64 end); 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); 266 267 #endif /* BTRFS_EXTENT_IO_TREE_H */ 268