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 38 enum { 39 IO_TREE_FS_PINNED_EXTENTS, 40 IO_TREE_FS_EXCLUDED_EXTENTS, 41 IO_TREE_INODE_IO, 42 IO_TREE_INODE_IO_FAILURE, 43 IO_TREE_RELOC_BLOCKS, 44 IO_TREE_TRANS_DIRTY_PAGES, 45 IO_TREE_ROOT_DIRTY_LOG_PAGES, 46 IO_TREE_INODE_FILE_EXTENT, 47 IO_TREE_LOG_CSUM_RANGE, 48 IO_TREE_SELFTEST, 49 }; 50 51 struct extent_io_tree { 52 struct rb_root state; 53 struct btrfs_fs_info *fs_info; 54 void *private_data; 55 u64 dirty_bytes; 56 bool track_uptodate; 57 58 /* Who owns this io tree, should be one of IO_TREE_* */ 59 u8 owner; 60 61 spinlock_t lock; 62 const struct extent_io_ops *ops; 63 }; 64 65 struct extent_state { 66 u64 start; 67 u64 end; /* inclusive */ 68 struct rb_node rb_node; 69 70 /* ADD NEW ELEMENTS AFTER THIS */ 71 wait_queue_head_t wq; 72 refcount_t refs; 73 unsigned state; 74 75 struct io_failure_record *failrec; 76 77 #ifdef CONFIG_BTRFS_DEBUG 78 struct list_head leak_list; 79 #endif 80 }; 81 82 int __init extent_state_cache_init(void); 83 void __cold extent_state_cache_exit(void); 84 85 void extent_io_tree_init(struct btrfs_fs_info *fs_info, 86 struct extent_io_tree *tree, unsigned int owner, 87 void *private_data); 88 void extent_io_tree_release(struct extent_io_tree *tree); 89 90 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 91 struct extent_state **cached); 92 93 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) 94 { 95 return lock_extent_bits(tree, start, end, NULL); 96 } 97 98 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); 99 100 int __init extent_io_init(void); 101 void __cold extent_io_exit(void); 102 103 u64 count_range_bits(struct extent_io_tree *tree, 104 u64 *start, u64 search_end, 105 u64 max_bytes, unsigned bits, int contig); 106 107 void free_extent_state(struct extent_state *state); 108 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, 109 unsigned bits, int filled, 110 struct extent_state *cached_state); 111 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 112 unsigned bits, struct extent_changeset *changeset); 113 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 114 unsigned bits, int wake, int delete, 115 struct extent_state **cached); 116 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 117 unsigned bits, int wake, int delete, 118 struct extent_state **cached, gfp_t mask, 119 struct extent_changeset *changeset); 120 121 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) 122 { 123 return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL); 124 } 125 126 static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, 127 u64 end, struct extent_state **cached) 128 { 129 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, 130 GFP_NOFS, NULL); 131 } 132 133 static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree, 134 u64 start, u64 end, struct extent_state **cached) 135 { 136 return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, 137 GFP_ATOMIC, NULL); 138 } 139 140 static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, 141 u64 end, unsigned bits) 142 { 143 int wake = 0; 144 145 if (bits & EXTENT_LOCKED) 146 wake = 1; 147 148 return clear_extent_bit(tree, start, end, bits, wake, 0, NULL); 149 } 150 151 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, 152 unsigned bits, struct extent_changeset *changeset); 153 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 154 unsigned bits, u64 *failed_start, 155 struct extent_state **cached_state, gfp_t mask); 156 int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end, 157 unsigned bits); 158 159 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, 160 u64 end, unsigned bits) 161 { 162 return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); 163 } 164 165 static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, 166 u64 end, struct extent_state **cached_state) 167 { 168 return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, 169 cached_state, GFP_NOFS, NULL); 170 } 171 172 static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, 173 u64 end, gfp_t mask) 174 { 175 return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, 176 NULL, mask); 177 } 178 179 static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, 180 u64 end, struct extent_state **cached) 181 { 182 return clear_extent_bit(tree, start, end, 183 EXTENT_DIRTY | EXTENT_DELALLOC | 184 EXTENT_DO_ACCOUNTING, 0, 0, cached); 185 } 186 187 int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, 188 unsigned bits, unsigned clear_bits, 189 struct extent_state **cached_state); 190 191 static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, 192 u64 end, unsigned int extra_bits, 193 struct extent_state **cached_state) 194 { 195 return set_extent_bit(tree, start, end, 196 EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits, 197 NULL, cached_state, GFP_NOFS); 198 } 199 200 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, 201 u64 end, struct extent_state **cached_state) 202 { 203 return set_extent_bit(tree, start, end, 204 EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, 205 NULL, cached_state, GFP_NOFS); 206 } 207 208 static inline int set_extent_new(struct extent_io_tree *tree, u64 start, 209 u64 end) 210 { 211 return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, 212 GFP_NOFS); 213 } 214 215 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, 216 u64 end, struct extent_state **cached_state, gfp_t mask) 217 { 218 return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, 219 cached_state, mask); 220 } 221 222 int find_first_extent_bit(struct extent_io_tree *tree, u64 start, 223 u64 *start_ret, u64 *end_ret, unsigned bits, 224 struct extent_state **cached_state); 225 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start, 226 u64 *start_ret, u64 *end_ret, unsigned bits); 227 int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start, 228 u64 *start_ret, u64 *end_ret, unsigned bits); 229 int extent_invalidatepage(struct extent_io_tree *tree, 230 struct page *page, unsigned long offset); 231 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start, 232 u64 *end, u64 max_bytes, 233 struct extent_state **cached_state); 234 235 /* This should be reworked in the future and put elsewhere. */ 236 int get_state_failrec(struct extent_io_tree *tree, u64 start, 237 struct io_failure_record **failrec); 238 int set_state_failrec(struct extent_io_tree *tree, u64 start, 239 struct io_failure_record *failrec); 240 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, 241 u64 end); 242 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, 243 struct io_failure_record **failrec_ret); 244 int free_io_failure(struct extent_io_tree *failure_tree, 245 struct extent_io_tree *io_tree, 246 struct io_failure_record *rec); 247 int clean_io_failure(struct btrfs_fs_info *fs_info, 248 struct extent_io_tree *failure_tree, 249 struct extent_io_tree *io_tree, u64 start, 250 struct page *page, u64 ino, unsigned int pg_offset); 251 252 #endif /* BTRFS_EXTENT_IO_TREE_H */ 253