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