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 
11 /* buf log item flags */
12 #define	XFS_BLI_HOLD		0x01
13 #define	XFS_BLI_DIRTY		0x02
14 #define	XFS_BLI_STALE		0x04
15 #define	XFS_BLI_LOGGED		0x08
16 #define	XFS_BLI_INODE_ALLOC_BUF	0x10
17 #define XFS_BLI_STALE_INODE	0x20
18 #define	XFS_BLI_INODE_BUF	0x40
19 #define	XFS_BLI_ORDERED		0x80
20 
21 #define XFS_BLI_FLAGS \
22 	{ XFS_BLI_HOLD,		"HOLD" }, \
23 	{ XFS_BLI_DIRTY,	"DIRTY" }, \
24 	{ XFS_BLI_STALE,	"STALE" }, \
25 	{ XFS_BLI_LOGGED,	"LOGGED" }, \
26 	{ XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
27 	{ XFS_BLI_STALE_INODE,	"STALE_INODE" }, \
28 	{ XFS_BLI_INODE_BUF,	"INODE_BUF" }, \
29 	{ XFS_BLI_ORDERED,	"ORDERED" }
30 
31 
32 struct xfs_buf;
33 struct xfs_mount;
34 struct xfs_buf_log_item;
35 
36 /*
37  * This is the in core log item structure used to track information
38  * needed to log buffers.  It tracks how many times the lock has been
39  * locked, and which 128 byte chunks of the buffer are dirty.
40  */
41 struct xfs_buf_log_item {
42 	xfs_log_item_t		bli_item;	/* common item structure */
43 	struct xfs_buf		*bli_buf;	/* real buffer pointer */
44 	unsigned int		bli_flags;	/* misc flags */
45 	unsigned int		bli_recur;	/* lock recursion count */
46 	atomic_t		bli_refcount;	/* cnt of tp refs */
47 	int			bli_format_count;	/* count of headers */
48 	struct xfs_buf_log_format *bli_formats;	/* array of in-log header ptrs */
49 	struct xfs_buf_log_format __bli_format;	/* embedded in-log header */
50 };
51 
52 int	xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
53 void	xfs_buf_item_relse(struct xfs_buf *);
54 bool	xfs_buf_item_put(struct xfs_buf_log_item *);
55 void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
56 bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
57 void	xfs_buf_attach_iodone(struct xfs_buf *,
58 			      void(*)(struct xfs_buf *, xfs_log_item_t *),
59 			      xfs_log_item_t *);
60 void	xfs_buf_iodone_callbacks(struct xfs_buf *);
61 void	xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
62 bool	xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
63 					struct list_head *);
64 
65 extern kmem_zone_t	*xfs_buf_item_zone;
66 
67 #endif	/* __XFS_BUF_ITEM_H__ */
68