/* SPDX-License-Identifier: GPL-2.0 */ #ifndef BTRFS_EXTENT_IO_TREE_H #define BTRFS_EXTENT_IO_TREE_H #include #include #include #include #include #include "misc.h" struct extent_changeset; struct btrfs_fs_info; struct btrfs_inode; /* Bits for the extent state */ enum { ENUM_BIT(EXTENT_DIRTY), ENUM_BIT(EXTENT_UPTODATE), ENUM_BIT(EXTENT_LOCKED), ENUM_BIT(EXTENT_DIO_LOCKED), ENUM_BIT(EXTENT_NEW), ENUM_BIT(EXTENT_DELALLOC), ENUM_BIT(EXTENT_DEFRAG), ENUM_BIT(EXTENT_BOUNDARY), ENUM_BIT(EXTENT_NODATASUM), ENUM_BIT(EXTENT_CLEAR_META_RESV), ENUM_BIT(EXTENT_NEED_WAIT), ENUM_BIT(EXTENT_NORESERVE), ENUM_BIT(EXTENT_QGROUP_RESERVED), ENUM_BIT(EXTENT_CLEAR_DATA_RESV), /* * 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. */ ENUM_BIT(EXTENT_DELALLOC_NEW), /* * 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). */ ENUM_BIT(EXTENT_ADD_INODE_BYTES), /* * Set during truncate when we're clearing an entire range and we just * want the extent states to go away. */ ENUM_BIT(EXTENT_CLEAR_ALL_BITS), /* * This must be last. * * Bit not representing a state but a request for NOWAIT semantics, * e.g. when allocating memory, and must be masked out from the other * bits. */ ENUM_BIT(EXTENT_NOWAIT) }; #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) #define EXTENT_LOCK_BITS (EXTENT_LOCKED | EXTENT_DIO_LOCKED) /* * 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; /* * The fs_info is needed for trace points, a tree attached to an inode * needs the inode. * * owner == IO_TREE_INODE_IO - then inode is valid and fs_info can be * accessed as inode->root->fs_info */ union { struct btrfs_fs_info *fs_info; struct btrfs_inode *inode; }; /* 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 }; struct btrfs_inode *extent_io_tree_to_inode(struct extent_io_tree *tree); const struct btrfs_inode *extent_io_tree_to_inode_const(const struct extent_io_tree *tree); const struct btrfs_fs_info *extent_io_tree_to_fs_info(const struct extent_io_tree *tree); void extent_io_tree_init(struct btrfs_fs_info *fs_info, struct extent_io_tree *tree, unsigned int owner); void extent_io_tree_release(struct extent_io_tree *tree); int __lock_extent(struct extent_io_tree *tree, u64 start, u64 end, u32 bits, struct extent_state **cached); bool __try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, u32 bits, struct extent_state **cached); static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached) { return __lock_extent(tree, start, end, EXTENT_LOCKED, cached); } static inline bool try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached) { return __try_lock_extent(tree, start, end, EXTENT_LOCKED, cached); } 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, struct extent_state **cached_state); void free_extent_state(struct extent_state *state); bool test_range_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bit, struct extent_state *cached_state); bool test_range_bit_exists(struct extent_io_tree *tree, u64 start, u64 end, u32 bit); 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, 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, 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, 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); 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, NULL); } 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); bool 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); static inline int lock_dio_extent(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached) { return __lock_extent(tree, start, end, EXTENT_DIO_LOCKED, cached); } static inline bool try_lock_dio_extent(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached) { return __try_lock_extent(tree, start, end, EXTENT_DIO_LOCKED, cached); } static inline int unlock_dio_extent(struct extent_io_tree *tree, u64 start, u64 end, struct extent_state **cached) { return __clear_extent_bit(tree, start, end, EXTENT_DIO_LOCKED, cached, NULL); } #endif /* BTRFS_EXTENT_IO_TREE_H */