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 #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_INFO_FREED_EXTENTS0,
  40         IO_TREE_FS_INFO_FREED_EXTENTS1,
  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_SELFTEST,
  47 };
  48
  49 struct extent_io_tree {
  50         struct rb_root state;
  51         struct btrfs_fs_info *fs_info;
  52         void *private_data;
  53         u64 dirty_bytes;
  54         bool track_uptodate;
  55
  56         /* Who owns this io tree, should be one of IO_TREE_* */
  57         u8 owner;
  58
  59         spinlock_t lock;
  60         const struct extent_io_ops *ops;
  61 };
  62
  63 struct extent_state {
  64         u64 start;
  65         u64 end; /* inclusive */
  66         struct rb_node rb_node;
  67
  68         /* ADD NEW ELEMENTS AFTER THIS */
  69         wait_queue_head_t wq;
  70         refcount_t refs;
  71         unsigned state;
  72
  73         struct io_failure_record *failrec;
  74
  75 #ifdef CONFIG_BTRFS_DEBUG
  76         struct list_head leak_list;
  77 #endif
  78 };
  79
  80 int __init extent_state_cache_init(void);
  81 void __cold extent_state_cache_exit(void);
  82
  83 void extent_io_tree_init(struct btrfs_fs_info *fs_info,
  84                          struct extent_io_tree *tree, unsigned int owner,
  85                          void *private_data);
  86 void extent_io_tree_release(struct extent_io_tree *tree);
  87
  88 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
  89                      struct extent_state **cached);
  90
  91 static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
  92 {
  93         return lock_extent_bits(tree, start, end, NULL);
  94 }
  95
  96 int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
  97
  98 int __init extent_io_init(void);
  99 void __cold extent_io_exit(void);
 100
 101 u64 count_range_bits(struct extent_io_tree *tree,
 102                      u64 *start, u64 search_end,
 103                      u64 max_bytes, unsigned bits, int contig);
 104
 105 void free_extent_state(struct extent_state *state);
 106 int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
 107                    unsigned bits, int filled,
 108                    struct extent_state *cached_state);
 109 int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 110                 unsigned bits, struct extent_changeset *changeset);
 111 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 112                      unsigned bits, int wake, int delete,
 113                      struct extent_state **cached);
 114 int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 115                      unsigned bits, int wake, int delete,
 116                      struct extent_state **cached, gfp_t mask,
 117                      struct extent_changeset *changeset);
 118
 119 static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
 120 {
 121         return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
 122 }
 123
 124 static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start,
 125                 u64 end, struct extent_state **cached)
 126 {
 127         return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
 128                                 GFP_NOFS, NULL);
 129 }
 130
 131 static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree,
 132                 u64 start, u64 end, struct extent_state **cached)
 133 {
 134         return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
 135                                 GFP_ATOMIC, NULL);
 136 }
 137
 138 static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
 139                 u64 end, unsigned bits)
 140 {
 141         int wake = 0;
 142
 143         if (bits & EXTENT_LOCKED)
 144                 wake = 1;
 145
 146         return clear_extent_bit(tree, start, end, bits, wake, 0, NULL);
 147 }
 148
 149 int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 150                            unsigned bits, struct extent_changeset *changeset);
 151 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 152                    unsigned bits, u64 *failed_start,
 153                    struct extent_state **cached_state, gfp_t mask);
 154 int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
 155                            unsigned bits);
 156
 157 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
 158                 u64 end, unsigned bits)
 159 {
 160         return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS);
 161 }
 162
 163 static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
 164                 u64 end, struct extent_state **cached_state)
 165 {
 166         return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0,
 167                                 cached_state, GFP_NOFS, NULL);
 168 }
 169
 170 static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
 171                 u64 end, gfp_t mask)
 172 {
 173         return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL,
 174                               NULL, mask);
 175 }
 176
 177 static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
 178                                      u64 end, struct extent_state **cached)
 179 {
 180         return clear_extent_bit(tree, start, end,
 181                                 EXTENT_DIRTY | EXTENT_DELALLOC |
 182                                 EXTENT_DO_ACCOUNTING, 0, 0, cached);
 183 }
 184
 185 int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 186                        unsigned bits, unsigned clear_bits,
 187                        struct extent_state **cached_state);
 188
 189 static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
 190                                       u64 end, unsigned int extra_bits,
 191                                       struct extent_state **cached_state)
 192 {
 193         return set_extent_bit(tree, start, end,
 194                               EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits,
 195                               NULL, cached_state, GFP_NOFS);
 196 }
 197
 198 static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
 199                 u64 end, struct extent_state **cached_state)
 200 {
 201         return set_extent_bit(tree, start, end,
 202                               EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG,
 203                               NULL, cached_state, GFP_NOFS);
 204 }
 205
 206 static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
 207                 u64 end)
 208 {
 209         return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL,
 210                         GFP_NOFS);
 211 }
 212
 213 static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
 214                 u64 end, struct extent_state **cached_state, gfp_t mask)
 215 {
 216         return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL,
 217                               cached_state, mask);
 218 }
 219
 220 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
 221                           u64 *start_ret, u64 *end_ret, unsigned bits,
 222                           struct extent_state **cached_state);
 223 void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
 224                                  u64 *start_ret, u64 *end_ret, unsigned bits);
 225 int extent_invalidatepage(struct extent_io_tree *tree,
 226                           struct page *page, unsigned long offset);
 227 bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
 228                                u64 *end, u64 max_bytes,
 229                                struct extent_state **cached_state);
 230
 231 /* This should be reworked in the future and put elsewhere. */
 232 int get_state_failrec(struct extent_io_tree *tree, u64 start,
 233                       struct io_failure_record **failrec);
 234 int set_state_failrec(struct extent_io_tree *tree, u64 start,
 235                       struct io_failure_record *failrec);
 236 void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
 237                 u64 end);
 238 int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
 239                                 struct io_failure_record **failrec_ret);
 240 int free_io_failure(struct extent_io_tree *failure_tree,
 241                     struct extent_io_tree *io_tree,
 242                     struct io_failure_record *rec);
 243 int clean_io_failure(struct btrfs_fs_info *fs_info,
 244                      struct extent_io_tree *failure_tree,
 245                      struct extent_io_tree *io_tree, u64 start,
 246                      struct page *page, u64 ino, unsigned int pg_offset);
 247
 248 #endif /* BTRFS_EXTENT_IO_TREE_H */