xfs_buf_item.h

 1// SPDX-License-Identifier: GPL-2.0
 2/*
 3 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
 4 * All Rights Reserved.
 5 */
 6#ifndef	__XFS_BUF_ITEM_H__
 7#define	__XFS_BUF_ITEM_H__
 8
 9/* kernel only definitions */
10
11struct xfs_buf;
12struct xfs_mount;
13
14/* buf log item flags */
15#define	XFS_BLI_HOLD		(1u << 0)
16#define	XFS_BLI_DIRTY		(1u << 1)
17#define	XFS_BLI_STALE		(1u << 2)
18#define	XFS_BLI_LOGGED		(1u << 3)
19#define	XFS_BLI_INODE_ALLOC_BUF	(1u << 4)
20#define XFS_BLI_STALE_INODE	(1u << 5)
21#define	XFS_BLI_INODE_BUF	(1u << 6)
22#define	XFS_BLI_ORDERED		(1u << 7)
23
24#define XFS_BLI_FLAGS \
25	{ XFS_BLI_HOLD,		"HOLD" }, \
26	{ XFS_BLI_DIRTY,	"DIRTY" }, \
27	{ XFS_BLI_STALE,	"STALE" }, \
28	{ XFS_BLI_LOGGED,	"LOGGED" }, \
29	{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
30	{ XFS_BLI_STALE_INODE,	"STALE_INODE" }, \
31	{ XFS_BLI_INODE_BUF,	"INODE_BUF" }, \
32	{ XFS_BLI_ORDERED,	"ORDERED" }
33
34/*
35 * This is the in core log item structure used to track information
36 * needed to log buffers.  It tracks how many times the lock has been
37 * locked, and which 128 byte chunks of the buffer are dirty.
38 */
39struct xfs_buf_log_item {
40	struct xfs_log_item	bli_item;	/* common item structure */
41	struct xfs_buf		*bli_buf;	/* real buffer pointer */
42	unsigned int		bli_flags;	/* misc flags */
43	unsigned int		bli_recur;	/* lock recursion count */
44	atomic_t		bli_refcount;	/* cnt of tp refs */
45	int			bli_format_count;	/* count of headers */
46	struct xfs_buf_log_format *bli_formats;	/* array of in-log header ptrs */
47	struct xfs_buf_log_format __bli_format;	/* embedded in-log header */
48};
49
50int	xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
51void	xfs_buf_item_done(struct xfs_buf *bp);
52void	xfs_buf_item_put(struct xfs_buf_log_item *bip);
53void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
54bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
55void	xfs_buf_inode_iodone(struct xfs_buf *);
56#ifdef CONFIG_XFS_QUOTA
57void	xfs_buf_dquot_iodone(struct xfs_buf *);
58#else
59static inline void xfs_buf_dquot_iodone(struct xfs_buf *bp)
60{
61}
62#endif /* CONFIG_XFS_QUOTA */
63void	xfs_buf_iodone(struct xfs_buf *);
64bool	xfs_buf_log_check_iovec(struct kvec *iovec);
65
66unsigned int xfs_buf_inval_log_space(unsigned int map_count,
67		unsigned int blocksize);
68
69extern struct kmem_cache	*xfs_buf_item_cache;
70
71#endif	/* __XFS_BUF_ITEM_H__ */