249 lines
7.9 KiB
C
249 lines
7.9 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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struct extent_changeset;
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struct io_failure_record;
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/* Bits for the extent state */
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#define EXTENT_DIRTY (1U << 0)
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#define EXTENT_UPTODATE (1U << 1)
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#define EXTENT_LOCKED (1U << 2)
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#define EXTENT_NEW (1U << 3)
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#define EXTENT_DELALLOC (1U << 4)
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#define EXTENT_DEFRAG (1U << 5)
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#define EXTENT_BOUNDARY (1U << 6)
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#define EXTENT_NODATASUM (1U << 7)
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#define EXTENT_CLEAR_META_RESV (1U << 8)
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#define EXTENT_NEED_WAIT (1U << 9)
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#define EXTENT_DAMAGED (1U << 10)
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#define EXTENT_NORESERVE (1U << 11)
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#define EXTENT_QGROUP_RESERVED (1U << 12)
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#define EXTENT_CLEAR_DATA_RESV (1U << 13)
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#define EXTENT_DELALLOC_NEW (1U << 14)
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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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/*
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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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enum {
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IO_TREE_FS_INFO_FREED_EXTENTS0,
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IO_TREE_FS_INFO_FREED_EXTENTS1,
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IO_TREE_INODE_IO,
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IO_TREE_INODE_IO_FAILURE,
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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_SELFTEST,
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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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void *private_data;
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u64 dirty_bytes;
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bool track_uptodate;
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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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const struct extent_io_ops *ops;
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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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unsigned state;
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struct io_failure_record *failrec;
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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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int __init extent_state_cache_init(void);
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void __cold extent_state_cache_exit(void);
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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 *private_data);
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void extent_io_tree_release(struct extent_io_tree *tree);
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int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
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struct extent_state **cached);
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static inline int lock_extent(struct extent_io_tree *tree, u64 start, u64 end)
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{
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return lock_extent_bits(tree, start, end, NULL);
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}
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int try_lock_extent(struct extent_io_tree *tree, u64 start, u64 end);
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int __init extent_io_init(void);
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void __cold extent_io_exit(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, unsigned 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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unsigned bits, int filled,
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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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unsigned 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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unsigned bits, int wake, int delete,
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struct extent_state **cached);
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int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
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unsigned bits, int wake, int delete,
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struct extent_state **cached, gfp_t mask,
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struct extent_changeset *changeset);
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static inline int unlock_extent(struct extent_io_tree *tree, u64 start, u64 end)
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{
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return clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, NULL);
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}
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static inline int unlock_extent_cached(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, EXTENT_LOCKED, 1, 0, cached,
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GFP_NOFS, NULL);
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}
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static inline int unlock_extent_cached_atomic(struct extent_io_tree *tree,
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u64 start, u64 end, struct extent_state **cached)
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{
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return __clear_extent_bit(tree, start, end, EXTENT_LOCKED, 1, 0, cached,
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GFP_ATOMIC, 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, unsigned bits)
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{
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int wake = 0;
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if (bits & EXTENT_LOCKED)
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wake = 1;
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return clear_extent_bit(tree, start, end, bits, wake, 0, 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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unsigned 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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unsigned bits, u64 *failed_start,
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struct extent_state **cached_state, gfp_t mask);
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int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
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unsigned bits);
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static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
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u64 end, unsigned bits)
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{
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return set_extent_bit(tree, start, end, bits, NULL, 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, 0, 0,
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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,
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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, 0, 0, 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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unsigned bits, unsigned 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, unsigned int 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 | EXTENT_UPTODATE | extra_bits,
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NULL, 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_UPTODATE | EXTENT_DEFRAG,
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NULL, 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, NULL,
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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, NULL,
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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, unsigned 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, unsigned bits);
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int extent_invalidatepage(struct extent_io_tree *tree,
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struct page *page, unsigned long offset);
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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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/* This should be reworked in the future and put elsewhere. */
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int get_state_failrec(struct extent_io_tree *tree, u64 start,
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struct io_failure_record **failrec);
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int set_state_failrec(struct extent_io_tree *tree, u64 start,
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struct io_failure_record *failrec);
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void btrfs_free_io_failure_record(struct btrfs_inode *inode, u64 start,
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u64 end);
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int btrfs_get_io_failure_record(struct inode *inode, u64 start, u64 end,
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struct io_failure_record **failrec_ret);
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int free_io_failure(struct extent_io_tree *failure_tree,
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struct extent_io_tree *io_tree,
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struct io_failure_record *rec);
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int clean_io_failure(struct btrfs_fs_info *fs_info,
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struct extent_io_tree *failure_tree,
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struct extent_io_tree *io_tree, u64 start,
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struct page *page, u64 ino, unsigned int pg_offset);
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#endif /* BTRFS_EXTENT_IO_TREE_H */
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