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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
32struct xfs_buf;
33struct xfs_mount;
34struct 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 */
41struct xfs_buf_log_item {
42 struct xfs_log_item 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
52int xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
53void xfs_buf_item_relse(struct xfs_buf *);
54bool xfs_buf_item_put(struct xfs_buf_log_item *);
55void xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
56bool xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
57void xfs_buf_attach_iodone(struct xfs_buf *,
58 void(*)(struct xfs_buf *, struct xfs_log_item *),
59 struct xfs_log_item *);
60void xfs_buf_iodone_callbacks(struct xfs_buf *);
61void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
62bool xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
63 struct list_head *);
64
65extern kmem_zone_t *xfs_buf_item_zone;
66
67#endif /* __XFS_BUF_ITEM_H__ */