216 lines
6.3 KiB
C
216 lines
6.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2007 Oracle. All rights reserved.
|
|
*/
|
|
|
|
#ifndef BTRFS_ORDERED_DATA_H
|
|
#define BTRFS_ORDERED_DATA_H
|
|
|
|
/* one of these per inode */
|
|
struct btrfs_ordered_inode_tree {
|
|
spinlock_t lock;
|
|
struct rb_root tree;
|
|
struct rb_node *last;
|
|
};
|
|
|
|
struct btrfs_ordered_sum {
|
|
/* bytenr is the start of this extent on disk */
|
|
u64 bytenr;
|
|
|
|
/*
|
|
* this is the length in bytes covered by the sums array below.
|
|
*/
|
|
int len;
|
|
struct list_head list;
|
|
/* last field is a variable length array of csums */
|
|
u8 sums[];
|
|
};
|
|
|
|
/*
|
|
* Bits for btrfs_ordered_extent::flags.
|
|
*
|
|
* BTRFS_ORDERED_IO_DONE is set when all of the blocks are written.
|
|
* It is used to make sure metadata is inserted into the tree only once
|
|
* per extent.
|
|
*
|
|
* BTRFS_ORDERED_COMPLETE is set when the extent is removed from the
|
|
* rbtree, just before waking any waiters. It is used to indicate the
|
|
* IO is done and any metadata is inserted into the tree.
|
|
*/
|
|
enum {
|
|
/*
|
|
* Different types for ordered extents, one and only one of the 4 types
|
|
* need to be set when creating ordered extent.
|
|
*
|
|
* REGULAR: For regular non-compressed COW write
|
|
* NOCOW: For NOCOW write into existing non-hole extent
|
|
* PREALLOC: For NOCOW write into preallocated extent
|
|
* COMPRESSED: For compressed COW write
|
|
*/
|
|
BTRFS_ORDERED_REGULAR,
|
|
BTRFS_ORDERED_NOCOW,
|
|
BTRFS_ORDERED_PREALLOC,
|
|
BTRFS_ORDERED_COMPRESSED,
|
|
|
|
/*
|
|
* Extra bit for direct io, can only be set for
|
|
* REGULAR/NOCOW/PREALLOC. No direct io for compressed extent.
|
|
*/
|
|
BTRFS_ORDERED_DIRECT,
|
|
|
|
/* Extra status bits for ordered extents */
|
|
|
|
/* set when all the pages are written */
|
|
BTRFS_ORDERED_IO_DONE,
|
|
/* set when removed from the tree */
|
|
BTRFS_ORDERED_COMPLETE,
|
|
/* We had an io error when writing this out */
|
|
BTRFS_ORDERED_IOERR,
|
|
/* Set when we have to truncate an extent */
|
|
BTRFS_ORDERED_TRUNCATED,
|
|
/* Used during fsync to track already logged extents */
|
|
BTRFS_ORDERED_LOGGED,
|
|
/* We have already logged all the csums of the ordered extent */
|
|
BTRFS_ORDERED_LOGGED_CSUM,
|
|
/* We wait for this extent to complete in the current transaction */
|
|
BTRFS_ORDERED_PENDING,
|
|
/* BTRFS_IOC_ENCODED_WRITE */
|
|
BTRFS_ORDERED_ENCODED,
|
|
};
|
|
|
|
/* BTRFS_ORDERED_* flags that specify the type of the extent. */
|
|
#define BTRFS_ORDERED_TYPE_FLAGS ((1UL << BTRFS_ORDERED_REGULAR) | \
|
|
(1UL << BTRFS_ORDERED_NOCOW) | \
|
|
(1UL << BTRFS_ORDERED_PREALLOC) | \
|
|
(1UL << BTRFS_ORDERED_COMPRESSED) | \
|
|
(1UL << BTRFS_ORDERED_DIRECT) | \
|
|
(1UL << BTRFS_ORDERED_ENCODED))
|
|
|
|
struct btrfs_ordered_extent {
|
|
/* logical offset in the file */
|
|
u64 file_offset;
|
|
|
|
/*
|
|
* These fields directly correspond to the same fields in
|
|
* btrfs_file_extent_item.
|
|
*/
|
|
u64 num_bytes;
|
|
u64 ram_bytes;
|
|
u64 disk_bytenr;
|
|
u64 disk_num_bytes;
|
|
u64 offset;
|
|
|
|
/* number of bytes that still need writing */
|
|
u64 bytes_left;
|
|
|
|
/*
|
|
* the end of the ordered extent which is behind it but
|
|
* didn't update disk_i_size. Please see the comment of
|
|
* btrfs_ordered_update_i_size();
|
|
*/
|
|
u64 outstanding_isize;
|
|
|
|
/*
|
|
* If we get truncated we need to adjust the file extent we enter for
|
|
* this ordered extent so that we do not expose stale data.
|
|
*/
|
|
u64 truncated_len;
|
|
|
|
/* flags (described above) */
|
|
unsigned long flags;
|
|
|
|
/* compression algorithm */
|
|
int compress_type;
|
|
|
|
/* Qgroup reserved space */
|
|
int qgroup_rsv;
|
|
|
|
/* reference count */
|
|
refcount_t refs;
|
|
|
|
/* the inode we belong to */
|
|
struct inode *inode;
|
|
|
|
/* list of checksums for insertion when the extent io is done */
|
|
struct list_head list;
|
|
|
|
/* used for fast fsyncs */
|
|
struct list_head log_list;
|
|
|
|
/* used to wait for the BTRFS_ORDERED_COMPLETE bit */
|
|
wait_queue_head_t wait;
|
|
|
|
/* our friendly rbtree entry */
|
|
struct rb_node rb_node;
|
|
|
|
/* a per root list of all the pending ordered extents */
|
|
struct list_head root_extent_list;
|
|
|
|
struct btrfs_work work;
|
|
|
|
struct completion completion;
|
|
struct btrfs_work flush_work;
|
|
struct list_head work_list;
|
|
|
|
/*
|
|
* Used to reverse-map physical address returned from ZONE_APPEND write
|
|
* command in a workqueue context
|
|
*/
|
|
u64 physical;
|
|
};
|
|
|
|
static inline void
|
|
btrfs_ordered_inode_tree_init(struct btrfs_ordered_inode_tree *t)
|
|
{
|
|
spin_lock_init(&t->lock);
|
|
t->tree = RB_ROOT;
|
|
t->last = NULL;
|
|
}
|
|
|
|
int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
|
|
|
|
void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry);
|
|
void btrfs_remove_ordered_extent(struct btrfs_inode *btrfs_inode,
|
|
struct btrfs_ordered_extent *entry);
|
|
void btrfs_mark_ordered_io_finished(struct btrfs_inode *inode,
|
|
struct page *page, u64 file_offset,
|
|
u64 num_bytes, bool uptodate);
|
|
bool btrfs_dec_test_ordered_pending(struct btrfs_inode *inode,
|
|
struct btrfs_ordered_extent **cached,
|
|
u64 file_offset, u64 io_size);
|
|
int btrfs_add_ordered_extent(struct btrfs_inode *inode, u64 file_offset,
|
|
u64 num_bytes, u64 ram_bytes, u64 disk_bytenr,
|
|
u64 disk_num_bytes, u64 offset, unsigned flags,
|
|
int compress_type);
|
|
void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
|
|
struct btrfs_ordered_sum *sum);
|
|
struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct btrfs_inode *inode,
|
|
u64 file_offset);
|
|
void btrfs_start_ordered_extent(struct btrfs_ordered_extent *entry);
|
|
int btrfs_wait_ordered_range(struct inode *inode, u64 start, u64 len);
|
|
struct btrfs_ordered_extent *
|
|
btrfs_lookup_first_ordered_extent(struct btrfs_inode *inode, u64 file_offset);
|
|
struct btrfs_ordered_extent *btrfs_lookup_first_ordered_range(
|
|
struct btrfs_inode *inode, u64 file_offset, u64 len);
|
|
struct btrfs_ordered_extent *btrfs_lookup_ordered_range(
|
|
struct btrfs_inode *inode,
|
|
u64 file_offset,
|
|
u64 len);
|
|
void btrfs_get_ordered_extents_for_logging(struct btrfs_inode *inode,
|
|
struct list_head *list);
|
|
u64 btrfs_wait_ordered_extents(struct btrfs_root *root, u64 nr,
|
|
const u64 range_start, const u64 range_len);
|
|
void btrfs_wait_ordered_roots(struct btrfs_fs_info *fs_info, u64 nr,
|
|
const u64 range_start, const u64 range_len);
|
|
void btrfs_lock_and_flush_ordered_range(struct btrfs_inode *inode, u64 start,
|
|
u64 end,
|
|
struct extent_state **cached_state);
|
|
bool btrfs_try_lock_ordered_range(struct btrfs_inode *inode, u64 start, u64 end,
|
|
struct extent_state **cached_state);
|
|
int btrfs_split_ordered_extent(struct btrfs_ordered_extent *ordered, u64 pre,
|
|
u64 post);
|
|
int __init ordered_data_init(void);
|
|
void __cold ordered_data_exit(void);
|
|
|
|
#endif
|