241 lines
7.5 KiB
C
241 lines
7.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef BTRFS_EXTENT_IO_TREE_H
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#define BTRFS_EXTENT_IO_TREE_H
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#include "kerncompat.h"
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#include "kernel-shared/misc.h"
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struct extent_changeset;
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struct io_failure_record;
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/* Bits for the extent state */
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enum {
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ENUM_BIT(EXTENT_DIRTY),
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ENUM_BIT(EXTENT_UPTODATE),
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ENUM_BIT(EXTENT_LOCKED),
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ENUM_BIT(EXTENT_NEW),
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ENUM_BIT(EXTENT_DELALLOC),
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ENUM_BIT(EXTENT_DEFRAG),
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ENUM_BIT(EXTENT_BOUNDARY),
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ENUM_BIT(EXTENT_NODATASUM),
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ENUM_BIT(EXTENT_CLEAR_META_RESV),
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ENUM_BIT(EXTENT_NEED_WAIT),
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ENUM_BIT(EXTENT_NORESERVE),
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ENUM_BIT(EXTENT_QGROUP_RESERVED),
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ENUM_BIT(EXTENT_CLEAR_DATA_RESV),
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/*
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* Must be cleared only during ordered extent completion or on error
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* paths if we did not manage to submit bios and create the ordered
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* extents for the range. Should not be cleared during page release
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* and page invalidation (if there is an ordered extent in flight),
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* that is left for the ordered extent completion.
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*/
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ENUM_BIT(EXTENT_DELALLOC_NEW),
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/*
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* When an ordered extent successfully completes for a region marked as
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* a new delalloc range, use this flag when clearing a new delalloc
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* range to indicate that the VFS' inode number of bytes should be
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* incremented and the inode's new delalloc bytes decremented, in an
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* atomic way to prevent races with stat(2).
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*/
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ENUM_BIT(EXTENT_ADD_INODE_BYTES),
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/*
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* Set during truncate when we're clearing an entire range and we just
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* want the extent states to go away.
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*/
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ENUM_BIT(EXTENT_CLEAR_ALL_BITS),
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};
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#define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
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EXTENT_CLEAR_DATA_RESV)
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#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
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EXTENT_ADD_INODE_BYTES | \
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EXTENT_CLEAR_ALL_BITS)
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/*
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* Redefined bits above which are used only in the device allocation tree,
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* shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
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* / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
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* manipulation functions
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*/
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#define CHUNK_ALLOCATED EXTENT_DIRTY
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#define CHUNK_TRIMMED EXTENT_DEFRAG
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#define CHUNK_STATE_MASK (CHUNK_ALLOCATED | \
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CHUNK_TRIMMED)
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enum {
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IO_TREE_FS_PINNED_EXTENTS,
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IO_TREE_FS_EXCLUDED_EXTENTS,
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IO_TREE_BTREE_INODE_IO,
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IO_TREE_INODE_IO,
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IO_TREE_RELOC_BLOCKS,
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IO_TREE_TRANS_DIRTY_PAGES,
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IO_TREE_ROOT_DIRTY_LOG_PAGES,
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IO_TREE_INODE_FILE_EXTENT,
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IO_TREE_LOG_CSUM_RANGE,
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IO_TREE_SELFTEST,
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IO_TREE_DEVICE_ALLOC_STATE,
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};
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struct extent_io_tree {
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struct rb_root state;
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struct btrfs_fs_info *fs_info;
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/* Inode associated with this tree, or NULL. */
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struct btrfs_inode *inode;
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/* Who owns this io tree, should be one of IO_TREE_* */
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u8 owner;
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spinlock_t lock;
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};
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struct extent_state {
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u64 start;
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u64 end; /* inclusive */
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struct rb_node rb_node;
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/* ADD NEW ELEMENTS AFTER THIS */
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wait_queue_head_t wq;
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refcount_t refs;
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u32 state;
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#ifdef CONFIG_BTRFS_DEBUG
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struct list_head leak_list;
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#endif
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};
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void extent_io_tree_init(struct btrfs_fs_info *fs_info,
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struct extent_io_tree *tree, unsigned int owner);
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void extent_io_tree_release(struct extent_io_tree *tree);
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int lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
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struct extent_state **cached);
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int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end,
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struct extent_state **cached);
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int __init extent_state_init_cachep(void);
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void __cold extent_state_free_cachep(void);
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u64 count_range_bits(struct extent_io_tree *tree,
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u64 *start, u64 search_end,
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u64 max_bytes, u32 bits, int contig);
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void free_extent_state(struct extent_state *state);
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int test_range_bit(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, int filled, struct extent_state *cached_state);
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int clear_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, struct extent_changeset *changeset);
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int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, struct extent_state **cached, gfp_t mask,
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struct extent_changeset *changeset);
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static inline int clear_extent_bit(struct extent_io_tree *tree, u64 start,
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u64 end, u32 bits,
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struct extent_state **cached)
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{
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return __clear_extent_bit(tree, start, end, bits, cached,
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GFP_NOFS, NULL);
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}
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static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end,
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struct extent_state **cached)
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{
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return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, cached,
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GFP_NOFS, NULL);
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}
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static inline int clear_extent_bits(struct extent_io_tree *tree, u64 start,
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u64 end, u32 bits)
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{
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return clear_extent_bit(tree, start, end, bits, NULL);
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}
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int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, struct extent_changeset *changeset);
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int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, struct extent_state **cached_state, gfp_t mask);
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static inline int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start,
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u64 end, u32 bits)
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{
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return set_extent_bit(tree, start, end, bits, NULL, GFP_NOWAIT);
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}
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static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
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u64 end, u32 bits)
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{
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return set_extent_bit(tree, start, end, bits, NULL, GFP_NOFS);
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}
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static inline int clear_extent_uptodate(struct extent_io_tree *tree, u64 start,
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u64 end, struct extent_state **cached_state)
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{
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return __clear_extent_bit(tree, start, end, EXTENT_UPTODATE,
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cached_state, GFP_NOFS, NULL);
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}
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static inline int set_extent_dirty(struct extent_io_tree *tree, u64 start,
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u64 end, gfp_t mask)
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{
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return set_extent_bit(tree, start, end, EXTENT_DIRTY, NULL, mask);
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}
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static inline int clear_extent_dirty(struct extent_io_tree *tree, u64 start,
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u64 end, struct extent_state **cached)
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{
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return clear_extent_bit(tree, start, end,
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EXTENT_DIRTY | EXTENT_DELALLOC |
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EXTENT_DO_ACCOUNTING, cached);
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}
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int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
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u32 bits, u32 clear_bits,
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struct extent_state **cached_state);
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static inline int set_extent_delalloc(struct extent_io_tree *tree, u64 start,
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u64 end, u32 extra_bits,
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struct extent_state **cached_state)
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{
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return set_extent_bit(tree, start, end,
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EXTENT_DELALLOC | extra_bits,
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cached_state, GFP_NOFS);
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}
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static inline int set_extent_defrag(struct extent_io_tree *tree, u64 start,
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u64 end, struct extent_state **cached_state)
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{
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return set_extent_bit(tree, start, end,
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EXTENT_DELALLOC | EXTENT_DEFRAG,
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cached_state, GFP_NOFS);
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}
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static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
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u64 end)
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{
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return set_extent_bit(tree, start, end, EXTENT_NEW, NULL, GFP_NOFS);
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}
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static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
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u64 end, struct extent_state **cached_state, gfp_t mask)
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{
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return set_extent_bit(tree, start, end, EXTENT_UPTODATE,
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cached_state, mask);
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}
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int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
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u64 *start_ret, u64 *end_ret, u32 bits,
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struct extent_state **cached_state);
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void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
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u64 *start_ret, u64 *end_ret, u32 bits);
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int find_contiguous_extent_bit(struct extent_io_tree *tree, u64 start,
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u64 *start_ret, u64 *end_ret, u32 bits);
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bool btrfs_find_delalloc_range(struct extent_io_tree *tree, u64 *start,
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u64 *end, u64 max_bytes,
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struct extent_state **cached_state);
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void wait_extent_bit(struct extent_io_tree *tree, u64 start, u64 end, u32 bits,
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struct extent_state **cached_state);
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#endif /* BTRFS_EXTENT_IO_TREE_H */
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