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 #define EXTENT_DELALLOC_NEW (1U << 14) 25 #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \ 26 EXTENT_CLEAR_DATA_RESV) 27 #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING) 28 29 /* 30 * Redefined bits above which are used only in the device allocation tree, 31 * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV 32 * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit 33 * manipulation functions 34 */ 35 #define CHUNK_ALLOCATED EXTENT_DIRTY 36 #define CHUNK_TRIMMED EXTENT_DEFRAG 37 #define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \ 38 CHUNK_TRIMMED) 39 40 enum { 41 IO_TREE_FS_PINNED_EXTENTS, 42 IO_TREE_FS_EXCLUDED_EXTENTS, 43 IO_TREE_INODE_IO, 44 IO_TREE_INODE_IO_FAILURE, 45 IO_TREE_RELOC_BLOCKS, 46 IO_TREE_TRANS_DIRTY_PAGES, 47 IO_TREE_ROOT_DIRTY_LOG_PAGES, 48 IO_TREE_INODE_FILE_EXTENT, 49 IO_TREE_LOG_CSUM_RANGE, 50 IO_TREE_SELFTEST, 51 }; 52 53 struct extent_io_tree { 54 struct rb_root state; 55 struct btrfs_fs_info *fs_info; 56 void *private_data; 57 u64 dirty_bytes; 58 bool track_uptodate; 59 60 /* Who owns this io tree, should be one of IO_TREE_* */ 61 u8 owner; 62 63 spinlock_t lock; 64 const struct extent_io_ops *ops; 65 }; 66 67 struct extent_state { 68 u64 start; 69 u64 end; /* inclusive */ 70 struct rb_node rb_node; 71 72 /* ADD NEW ELEMENTS AFTER THIS */ 73 wait_queue_head_t wq; 74 refcount_t refs; 75 unsigned state; 76 77 struct io_failure_record *failrec; 78 79 #ifdef CONFIG_BTRFS_DEBUG 80 struct list_head leak_list; 81 #endif 82 }; 83 84 int __init extent_state_cache_init(void); 85 void __cold extent_state_cache_exit(void); 86 87 void extent_io_tree_init(struct btrfs_fs_info *fs_info, 88 struct extent_io_tree *tree, unsigned int owner, 89 void *private_data); 90 void extent_io_tree_release(struct extent_io_tree *tree); 91 92 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 93 struct extent_state **cached); 94 95 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) 96 { 97 return lock_extent_bits(tree, start, end, NULL); 98 } 99 100 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); 101 102 int __init extent_io_init(void); 103 void __cold extent_io_exit(void); 104 105 u64 count_range_bits(struct extent_io_tree *tree, 106 u64 *start, u64 search_end, 107 u64 max_bytes, unsigned bits, int contig); 108 109 void free_extent_state(struct extent_state *state); 110 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, 111 unsigned bits, int filled, 112 struct extent_state *cached_state); 113 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 114 unsigned bits, struct extent_changeset *changeset); 115 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 116 unsigned bits, int wake, int delete, 117 struct extent_state **cached); 118 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 119 unsigned bits, int wake, int delete, 120 struct extent_state **cached, gfp_t mask, 121 struct extent_changeset *changeset); 122 123 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) 124 { 125 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL); 126 } 127 128 static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, 129 u64 end, struct extent_state **cached) 130 { 131 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, 132 GFP_NOFS, NULL); 133 } 134 135 static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree, 136 u64 start, u64 end, struct extent_state **cached) 137 { 138 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, 139 GFP_ATOMIC, NULL); 140 } 141 142 static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, 143 u64 end, unsigned bits) 144 { 145 int wake = 0; 146 147 if (bits & EXTENT_LOCKED) 148 wake = 1; 149 150 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL); 151 } 152 153 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 154 unsigned bits, struct extent_changeset *changeset); 155 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 156 unsigned bits, u64 *failed_start, 157 struct extent_state **cached_state, gfp_t mask); 158 int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end, 159 unsigned bits); 160 161 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, 162 u64 end, unsigned bits) 163 { 164 return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); 165 } 166 167 static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, 168 u64 end, struct extent_state **cached_state) 169 { 170 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, 171 cached_state, GFP_NOFS, NULL); 172 } 173 174 static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, 175 u64 end, gfp_t mask) 176 { 177 return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, 178 NULL, mask); 179 } 180 181 static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, 182 u64 end, struct extent_state **cached) 183 { 184 return clear_extent_bit(tree, start, end, 185 EXTENT_DIRTY | EXTENT_DELALLOC | 186 EXTENT_DO_ACCOUNTING, 0, 0, cached); 187 } 188 189 int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 190 unsigned bits, unsigned clear_bits, 191 struct extent_state **cached_state); 192 193 static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, 194 u64 end, unsigned int extra_bits, 195 struct extent_state **cached_state) 196 { 197 return set_extent_bit(tree, start, end, 198 EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits, 199 NULL, cached_state, GFP_NOFS); 200 } 201 202 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, 203 u64 end, struct extent_state **cached_state) 204 { 205 return set_extent_bit(tree, start, end, 206 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, 207 NULL, cached_state, GFP_NOFS); 208 } 209 210 static inline int set_extent_new(struct extent_io_tree *tree, u64 start, 211 u64 end) 212 { 213 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, 214 GFP_NOFS); 215 } 216 217 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, 218 u64 end, struct extent_state **cached_state, gfp_t mask) 219 { 220 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, 221 cached_state, mask); 222 } 223 224 int find_first_extent_bit(struct extent_io_tree *tree, u64 start, 225 u64 *start_ret, u64 *end_ret, unsigned bits, 226 struct extent_state **cached_state); 227 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start, 228 u64 *start_ret, u64 *end_ret, unsigned bits); 229 int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start, 230 u64 *start_ret, u64 *end_ret, unsigned bits); 231 int extent_invalidatepage(struct extent_io_tree *tree, 232 struct page *page, unsigned long offset); 233 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start, 234 u64 *end, u64 max_bytes, 235 struct extent_state **cached_state); 236 237 /* This should be reworked in the future and put elsewhere. */ 238 struct io_failure_record *get_state_failrec(struct extent_io_tree *tree, u64 start); 239 int set_state_failrec(struct extent_io_tree *tree, u64 start, 240 struct io_failure_record *failrec); 241 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, 242 u64 end); 243 int free_io_failure(struct extent_io_tree *failure_tree, 244 struct extent_io_tree *io_tree, 245 struct io_failure_record *rec); 246 int clean_io_failure(struct btrfs_fs_info *fs_info, 247 struct extent_io_tree *failure_tree, 248 struct extent_io_tree *io_tree, u64 start, 249 struct page *page, u64 ino, unsigned int pg_offset); 250 251 #endif /* BTRFS_EXTENT_IO_TREE_H */ 252