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- /* 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_NORESERVE (1U << 11)
- #define EXTENT_QGROUP_RESERVED (1U << 12)
- #define EXTENT_CLEAR_DATA_RESV (1U << 13)
- /*
- * Must be cleared only during ordered extent completion or on error paths if we
- * did not manage to submit bios and create the ordered extents for the range.
- * Should not be cleared during page release and page invalidation (if there is
- * an ordered extent in flight), that is left for the ordered extent completion.
- */
- #define EXTENT_DELALLOC_NEW (1U << 14)
- /*
- * When an ordered extent successfully completes for a region marked as a new
- * delalloc range, use this flag when clearing a new delalloc range to indicate
- * that the VFS' inode number of bytes should be incremented and the inode's new
- * delalloc bytes decremented, in an atomic way to prevent races with stat(2).
- */
- #define EXTENT_ADD_INODE_BYTES (1U << 15)
- /*
- * Set during truncate when we're clearing an entire range and we just want the
- * extent states to go away.
- */
- #define EXTENT_CLEAR_ALL_BITS (1U << 16)
- #define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
- EXTENT_CLEAR_DATA_RESV)
- #define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
- EXTENT_ADD_INODE_BYTES | \
- EXTENT_CLEAR_ALL_BITS)
- /*
- * 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
- #define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
- CHUNK_TRIMMED)
- enum {
- IO_TREE_FS_PINNED_EXTENTS,
- IO_TREE_FS_EXCLUDED_EXTENTS,
- IO_TREE_BTREE_INODE_IO,
- IO_TREE_INODE_IO,
- IO_TREE_RELOC_BLOCKS,
- IO_TREE_TRANS_DIRTY_PAGES,
- IO_TREE_ROOT_DIRTY_LOG_PAGES,
- IO_TREE_INODE_FILE_EXTENT,
- IO_TREE_LOG_CSUM_RANGE,
- IO_TREE_SELFTEST,
- IO_TREE_DEVICE_ALLOC_STATE,
- };
- struct extent_io_tree {
- struct rb_root state;
- struct btrfs_fs_info *fs_info;
- void *private_data;
- /* Who owns this io tree, should be one of IO_TREE_* */
- u8 owner;
- spinlock_t lock;
- };
- 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;
- u32 state;
- #ifdef CONFIG_BTRFS_DEBUG
- struct list_head leak_list;
- #endif
- };
- 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(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached);
- int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
- int __init extent_state_init_cachep(void);
- void __cold extent_state_free_cachep(void);
- u64 count_range_bits(struct extent_io_tree *tree,
- u64 *start, u64 search_end,
- u64 max_bytes, u32 bits, int contig);
- void free_extent_state(struct extent_state *state);
- int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, int filled, struct extent_state *cached_state);
- int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, struct extent_changeset *changeset);
- int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, struct extent_state **cached, gfp_t mask,
- struct extent_changeset *changeset);
- static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
- u64 end, u32 bits,
- struct extent_state **cached)
- {
- return __clear_extent_bit(tree, start, end, bits, cached,
- GFP_NOFS, NULL);
- }
- static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
- struct extent_state **cached)
- {
- return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached,
- GFP_NOFS, NULL);
- }
- static inline int unlock_extent_atomic(struct extent_io_tree *tree, u64 start,
- u64 end, struct extent_state **cached)
- {
- return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached,
- GFP_ATOMIC, NULL);
- }
- static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
- u64 end, u32 bits)
- {
- return clear_extent_bit(tree, start, end, bits, NULL);
- }
- int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, struct extent_changeset *changeset);
- int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, struct extent_state **cached_state, gfp_t mask);
- static inline int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start,
- u64 end, u32 bits)
- {
- return set_extent_bit(tree, start, end, bits, NULL, GFP_NOWAIT);
- }
- static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
- u64 end, u32 bits)
- {
- return set_extent_bit(tree, start, end, bits, 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,
- 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, 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, cached);
- }
- int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
- u32 bits, u32 clear_bits,
- struct extent_state **cached_state);
- static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
- u64 end, u32 extra_bits,
- struct extent_state **cached_state)
- {
- return set_extent_bit(tree, start, end,
- EXTENT_DELALLOC | extra_bits,
- 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_DEFRAG,
- 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, 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,
- cached_state, mask);
- }
- int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
- u64 *start_ret, u64 *end_ret, u32 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, u32 bits);
- int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
- u64 *start_ret, u64 *end_ret, u32 bits);
- bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
- u64 *end, u64 max_bytes,
- struct extent_state **cached_state);
- void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bits);
- #endif /* BTRFS_EXTENT_IO_TREE_H */
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