| /* SPDX-License-Identifier: GPL-2.0 */ |
| |
| #ifndef BTRFS_EXTENT_IO_TREE_H |
| #define BTRFS_EXTENT_IO_TREE_H |
| |
| struct extent_changeset; |
| struct io_failure_record; |
| |
| /* Bits for the extent state */ |
| #define EXTENT_DIRTY (1U << 0) |
| #define EXTENT_UPTODATE (1U << 1) |
| #define EXTENT_LOCKED (1U << 2) |
| #define EXTENT_NEW (1U << 3) |
| #define EXTENT_DELALLOC (1U << 4) |
| #define EXTENT_DEFRAG (1U << 5) |
| #define EXTENT_BOUNDARY (1U << 6) |
| #define EXTENT_NODATASUM (1U << 7) |
| #define EXTENT_CLEAR_META_RESV (1U << 8) |
| #define EXTENT_NEED_WAIT (1U << 9) |
| #define EXTENT_DAMAGED (1U << 10) |
| #define EXTENT_NORESERVE (1U << 11) |
| #define EXTENT_QGROUP_RESERVED (1U << 12) |
| #define EXTENT_CLEAR_DATA_RESV (1U << 13) |
| #define EXTENT_DELALLOC_NEW (1U << 14) |
| #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \ |
| EXTENT_CLEAR_DATA_RESV) |
| #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING) |
| |
| /* |
| * Redefined bits above which are used only in the device allocation tree, |
| * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV |
| * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit |
| * manipulation functions |
| */ |
| #define CHUNK_ALLOCATED EXTENT_DIRTY |
| #define CHUNK_TRIMMED EXTENT_DEFRAG |
| |
| enum { |
| IO_TREE_FS_PINNED_EXTENTS, |
| IO_TREE_FS_EXCLUDED_EXTENTS, |
| IO_TREE_INODE_IO, |
| IO_TREE_INODE_IO_FAILURE, |
| IO_TREE_RELOC_BLOCKS, |
| IO_TREE_TRANS_DIRTY_PAGES, |
| IO_TREE_ROOT_DIRTY_LOG_PAGES, |
| IO_TREE_INODE_FILE_EXTENT, |
| IO_TREE_SELFTEST, |
| }; |
| |
| struct extent_io_tree { |
| struct rb_root state; |
| struct btrfs_fs_info *fs_info; |
| void *private_data; |
| u64 dirty_bytes; |
| bool track_uptodate; |
| |
| /* Who owns this io tree, should be one of IO_TREE_* */ |
| u8 owner; |
| |
| spinlock_t lock; |
| const struct extent_io_ops *ops; |
| }; |
| |
| struct extent_state { |
| u64 start; |
| u64 end; /* inclusive */ |
| struct rb_node rb_node; |
| |
| /* ADD NEW ELEMENTS AFTER THIS */ |
| wait_queue_head_t wq; |
| refcount_t refs; |
| unsigned state; |
| |
| struct io_failure_record *failrec; |
| |
| #ifdef CONFIG_BTRFS_DEBUG |
| struct list_head leak_list; |
| #endif |
| }; |
| |
| int __init extent_state_cache_init(void); |
| void __cold extent_state_cache_exit(void); |
| |
| void extent_io_tree_init(struct btrfs_fs_info *fs_info, |
| struct extent_io_tree *tree, unsigned int owner, |
| void *private_data); |
| void extent_io_tree_release(struct extent_io_tree *tree); |
| |
| int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
| struct extent_state **cached); |
| |
| static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
| { |
| return lock_extent_bits(tree, start, end, NULL); |
| } |
| |
| int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end); |
| |
| int __init extent_io_init(void); |
| void __cold extent_io_exit(void); |
| |
| u64 count_range_bits(struct extent_io_tree *tree, |
| u64 *start, u64 search_end, |
| u64 max_bytes, unsigned bits, int contig); |
| |
| void free_extent_state(struct extent_state *state); |
| int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, int filled, |
| struct extent_state *cached_state); |
| int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, struct extent_changeset *changeset); |
| int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, int wake, int delete, |
| struct extent_state **cached); |
| int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, int wake, int delete, |
| struct extent_state **cached, gfp_t mask, |
| struct extent_changeset *changeset); |
| |
| static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end) |
| { |
| return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL); |
| } |
| |
| static inline int unlock_extent_cached(struct extent_io_tree *tree, u64 start, |
| u64 end, struct extent_state **cached) |
| { |
| return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, |
| GFP_NOFS, NULL); |
| } |
| |
| static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree, |
| u64 start, u64 end, struct extent_state **cached) |
| { |
| return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached, |
| GFP_ATOMIC, NULL); |
| } |
| |
| static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start, |
| u64 end, unsigned bits) |
| { |
| int wake = 0; |
| |
| if (bits & EXTENT_LOCKED) |
| wake = 1; |
| |
| return clear_extent_bit(tree, start, end, bits, wake, 0, NULL); |
| } |
| |
| int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, struct extent_changeset *changeset); |
| int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, u64 *failed_start, |
| struct extent_state **cached_state, gfp_t mask); |
| int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits); |
| |
| static inline int set_extent_bits(struct extent_io_tree *tree, u64 start, |
| u64 end, unsigned bits) |
| { |
| return set_extent_bit(tree, start, end, bits, NULL, NULL, GFP_NOFS); |
| } |
| |
| static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start, |
| u64 end, struct extent_state **cached_state) |
| { |
| return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE, 0, 0, |
| cached_state, GFP_NOFS, NULL); |
| } |
| |
| static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start, |
| u64 end, gfp_t mask) |
| { |
| return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, |
| NULL, mask); |
| } |
| |
| static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start, |
| u64 end, struct extent_state **cached) |
| { |
| return clear_extent_bit(tree, start, end, |
| EXTENT_DIRTY | EXTENT_DELALLOC | |
| EXTENT_DO_ACCOUNTING, 0, 0, cached); |
| } |
| |
| int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, |
| unsigned bits, unsigned clear_bits, |
| struct extent_state **cached_state); |
| |
| static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start, |
| u64 end, unsigned int extra_bits, |
| struct extent_state **cached_state) |
| { |
| return set_extent_bit(tree, start, end, |
| EXTENT_DELALLOC | EXTENT_UPTODATE | extra_bits, |
| NULL, cached_state, GFP_NOFS); |
| } |
| |
| static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start, |
| u64 end, struct extent_state **cached_state) |
| { |
| return set_extent_bit(tree, start, end, |
| EXTENT_DELALLOC | EXTENT_UPTODATE | EXTENT_DEFRAG, |
| NULL, cached_state, GFP_NOFS); |
| } |
| |
| static inline int set_extent_new(struct extent_io_tree *tree, u64 start, |
| u64 end) |
| { |
| return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, NULL, |
| GFP_NOFS); |
| } |
| |
| static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start, |
| u64 end, struct extent_state **cached_state, gfp_t mask) |
| { |
| return set_extent_bit(tree, start, end, EXTENT_UPTODATE, NULL, |
| cached_state, mask); |
| } |
| |
| int find_first_extent_bit(struct extent_io_tree *tree, u64 start, |
| u64 *start_ret, u64 *end_ret, unsigned bits, |
| struct extent_state **cached_state); |
| void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start, |
| u64 *start_ret, u64 *end_ret, unsigned bits); |
| int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start, |
| u64 *start_ret, u64 *end_ret, unsigned bits); |
| int extent_invalidatepage(struct extent_io_tree *tree, |
| struct page *page, unsigned long offset); |
| bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start, |
| u64 *end, u64 max_bytes, |
| struct extent_state **cached_state); |
| |
| /* This should be reworked in the future and put elsewhere. */ |
| int get_state_failrec(struct extent_io_tree *tree, u64 start, |
| struct io_failure_record **failrec); |
| int set_state_failrec(struct extent_io_tree *tree, u64 start, |
| struct io_failure_record *failrec); |
| void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start, |
| u64 end); |
| int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end, |
| struct io_failure_record **failrec_ret); |
| int free_io_failure(struct extent_io_tree *failure_tree, |
| struct extent_io_tree *io_tree, |
| struct io_failure_record *rec); |
| int clean_io_failure(struct btrfs_fs_info *fs_info, |
| struct extent_io_tree *failure_tree, |
| struct extent_io_tree *io_tree, u64 start, |
| struct page *page, u64 ino, unsigned int pg_offset); |
| |
| #endif /* BTRFS_EXTENT_IO_TREE_H */ |
