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1/*
2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_BUF_ITEM_H__
19#define __XFS_BUF_ITEM_H__
20
21/* kernel only definitions */
22
23/* buf log item flags */
24#define XFS_BLI_HOLD 0x01
25#define XFS_BLI_DIRTY 0x02
26#define XFS_BLI_STALE 0x04
27#define XFS_BLI_LOGGED 0x08
28#define XFS_BLI_INODE_ALLOC_BUF 0x10
29#define XFS_BLI_STALE_INODE 0x20
30#define XFS_BLI_INODE_BUF 0x40
31#define XFS_BLI_ORDERED 0x80
32
33#define XFS_BLI_FLAGS \
34 { XFS_BLI_HOLD, "HOLD" }, \
35 { XFS_BLI_DIRTY, "DIRTY" }, \
36 { XFS_BLI_STALE, "STALE" }, \
37 { XFS_BLI_LOGGED, "LOGGED" }, \
38 { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
39 { XFS_BLI_STALE_INODE, "STALE_INODE" }, \
40 { XFS_BLI_INODE_BUF, "INODE_BUF" }, \
41 { XFS_BLI_ORDERED, "ORDERED" }
42
43
44struct xfs_buf;
45struct xfs_mount;
46struct xfs_buf_log_item;
47
48/*
49 * This is the in core log item structure used to track information
50 * needed to log buffers. It tracks how many times the lock has been
51 * locked, and which 128 byte chunks of the buffer are dirty.
52 */
53typedef struct xfs_buf_log_item {
54 xfs_log_item_t bli_item; /* common item structure */
55 struct xfs_buf *bli_buf; /* real buffer pointer */
56 unsigned int bli_flags; /* misc flags */
57 unsigned int bli_recur; /* lock recursion count */
58 atomic_t bli_refcount; /* cnt of tp refs */
59 int bli_format_count; /* count of headers */
60 struct xfs_buf_log_format *bli_formats; /* array of in-log header ptrs */
61 struct xfs_buf_log_format __bli_format; /* embedded in-log header */
62} xfs_buf_log_item_t;
63
64void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
65void xfs_buf_item_relse(struct xfs_buf *);
66void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
67uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
68void xfs_buf_attach_iodone(struct xfs_buf *,
69 void(*)(struct xfs_buf *, xfs_log_item_t *),
70 xfs_log_item_t *);
71void xfs_buf_iodone_callbacks(struct xfs_buf *);
72void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
73
74extern kmem_zone_t *xfs_buf_item_zone;
75
76#endif /* __XFS_BUF_ITEM_H__ */
1/*
2 * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_BUF_ITEM_H__
19#define __XFS_BUF_ITEM_H__
20
21extern kmem_zone_t *xfs_buf_item_zone;
22
23/*
24 * This is the structure used to lay out a buf log item in the
25 * log. The data map describes which 128 byte chunks of the buffer
26 * have been logged.
27 * For 6.2 and beyond, this is XFS_LI_BUF. We use this to log everything.
28 */
29typedef struct xfs_buf_log_format {
30 unsigned short blf_type; /* buf log item type indicator */
31 unsigned short blf_size; /* size of this item */
32 ushort blf_flags; /* misc state */
33 ushort blf_len; /* number of blocks in this buf */
34 __int64_t blf_blkno; /* starting blkno of this buf */
35 unsigned int blf_map_size; /* size of data bitmap in words */
36 unsigned int blf_data_map[1];/* variable size bitmap of */
37 /* regions of buffer in this item */
38} xfs_buf_log_format_t;
39
40/*
41 * This flag indicates that the buffer contains on disk inodes
42 * and requires special recovery handling.
43 */
44#define XFS_BLF_INODE_BUF 0x1
45/*
46 * This flag indicates that the buffer should not be replayed
47 * during recovery because its blocks are being freed.
48 */
49#define XFS_BLF_CANCEL 0x2
50/*
51 * This flag indicates that the buffer contains on disk
52 * user or group dquots and may require special recovery handling.
53 */
54#define XFS_BLF_UDQUOT_BUF 0x4
55#define XFS_BLF_PDQUOT_BUF 0x8
56#define XFS_BLF_GDQUOT_BUF 0x10
57
58#define XFS_BLF_CHUNK 128
59#define XFS_BLF_SHIFT 7
60#define BIT_TO_WORD_SHIFT 5
61#define NBWORD (NBBY * sizeof(unsigned int))
62
63/*
64 * buf log item flags
65 */
66#define XFS_BLI_HOLD 0x01
67#define XFS_BLI_DIRTY 0x02
68#define XFS_BLI_STALE 0x04
69#define XFS_BLI_LOGGED 0x08
70#define XFS_BLI_INODE_ALLOC_BUF 0x10
71#define XFS_BLI_STALE_INODE 0x20
72#define XFS_BLI_INODE_BUF 0x40
73
74#define XFS_BLI_FLAGS \
75 { XFS_BLI_HOLD, "HOLD" }, \
76 { XFS_BLI_DIRTY, "DIRTY" }, \
77 { XFS_BLI_STALE, "STALE" }, \
78 { XFS_BLI_LOGGED, "LOGGED" }, \
79 { XFS_BLI_INODE_ALLOC_BUF, "INODE_ALLOC" }, \
80 { XFS_BLI_STALE_INODE, "STALE_INODE" }, \
81 { XFS_BLI_INODE_BUF, "INODE_BUF" }
82
83
84#ifdef __KERNEL__
85
86struct xfs_buf;
87struct xfs_mount;
88struct xfs_buf_log_item;
89
90/*
91 * This is the in core log item structure used to track information
92 * needed to log buffers. It tracks how many times the lock has been
93 * locked, and which 128 byte chunks of the buffer are dirty.
94 */
95typedef struct xfs_buf_log_item {
96 xfs_log_item_t bli_item; /* common item structure */
97 struct xfs_buf *bli_buf; /* real buffer pointer */
98 unsigned int bli_flags; /* misc flags */
99 unsigned int bli_recur; /* lock recursion count */
100 atomic_t bli_refcount; /* cnt of tp refs */
101#ifdef XFS_TRANS_DEBUG
102 char *bli_orig; /* original buffer copy */
103 char *bli_logged; /* bytes logged (bitmap) */
104#endif
105 xfs_buf_log_format_t bli_format; /* in-log header */
106} xfs_buf_log_item_t;
107
108void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
109void xfs_buf_item_relse(struct xfs_buf *);
110void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
111uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
112void xfs_buf_attach_iodone(struct xfs_buf *,
113 void(*)(struct xfs_buf *, xfs_log_item_t *),
114 xfs_log_item_t *);
115void xfs_buf_iodone_callbacks(struct xfs_buf *);
116void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
117
118#ifdef XFS_TRANS_DEBUG
119void
120xfs_buf_item_flush_log_debug(
121 struct xfs_buf *bp,
122 uint first,
123 uint last);
124#else
125#define xfs_buf_item_flush_log_debug(bp, first, last)
126#endif
127
128#endif /* __KERNEL__ */
129
130#endif /* __XFS_BUF_ITEM_H__ */