268 строки
8.8 KiB
C
268 строки
8.8 KiB
C
/* 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)
|
|
/*
|
|
* 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)
|
|
#define EXTENT_DO_ACCOUNTING (EXTENT_CLEAR_META_RESV | \
|
|
EXTENT_CLEAR_DATA_RESV)
|
|
#define EXTENT_CTLBITS (EXTENT_DO_ACCOUNTING | \
|
|
EXTENT_ADD_INODE_BYTES)
|
|
|
|
/*
|
|
* 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_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_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;
|
|
u64 dirty_bytes;
|
|
bool track_uptodate;
|
|
|
|
/* 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;
|
|
|
|
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, 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, int wake, int delete,
|
|
struct extent_state **cached);
|
|
int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
|
|
u32 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, u32 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,
|
|
u32 bits, struct extent_changeset *changeset);
|
|
int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
|
|
u32 bits, unsigned exclusive_bits, u64 *failed_start,
|
|
struct extent_state **cached_state, gfp_t mask,
|
|
struct extent_changeset *changeset);
|
|
int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
|
|
u32 bits);
|
|
|
|
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, 0, NULL, NULL, GFP_NOFS,
|
|
NULL);
|
|
}
|
|
|
|
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, 0, NULL, NULL,
|
|
mask, 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, 0, 0, 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 | EXTENT_UPTODATE | extra_bits,
|
|
0, NULL, cached_state, GFP_NOFS, NULL);
|
|
}
|
|
|
|
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,
|
|
0, NULL, cached_state, GFP_NOFS, NULL);
|
|
}
|
|
|
|
static inline int set_extent_new(struct extent_io_tree *tree, u64 start,
|
|
u64 end)
|
|
{
|
|
return set_extent_bit(tree, start, end, EXTENT_NEW, 0, NULL, NULL,
|
|
GFP_NOFS, NULL);
|
|
}
|
|
|
|
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, 0, NULL,
|
|
cached_state, mask, NULL);
|
|
}
|
|
|
|
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);
|
|
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. */
|
|
struct io_failure_record *get_state_failrec(struct extent_io_tree *tree, u64 start);
|
|
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 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 */
|