fs/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
   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 */