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1da177e4 | 1 | /* |
7b718769 NS |
2 | * Copyright (c) 2000-2001,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
7b718769 NS |
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 | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
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. | |
1da177e4 | 13 | * |
7b718769 NS |
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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_BUF_ITEM_H__ | |
19 | #define __XFS_BUF_ITEM_H__ | |
20 | ||
a8272ce0 DC |
21 | extern kmem_zone_t *xfs_buf_item_zone; |
22 | ||
1da177e4 LT |
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 | |
804195b6 | 26 | * have been logged. |
1da177e4 LT |
27 | * For 6.2 and beyond, this is XFS_LI_BUF. We use this to log everything. |
28 | */ | |
9abbc539 | 29 | typedef struct xfs_buf_log_format { |
1da177e4 LT |
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 | */ | |
c1155410 | 44 | #define XFS_BLF_INODE_BUF 0x1 |
1da177e4 LT |
45 | /* |
46 | * This flag indicates that the buffer should not be replayed | |
47 | * during recovery because its blocks are being freed. | |
48 | */ | |
c1155410 | 49 | #define XFS_BLF_CANCEL 0x2 |
1da177e4 LT |
50 | /* |
51 | * This flag indicates that the buffer contains on disk | |
52 | * user or group dquots and may require special recovery handling. | |
53 | */ | |
c1155410 DC |
54 | #define XFS_BLF_UDQUOT_BUF 0x4 |
55 | #define XFS_BLF_PDQUOT_BUF 0x8 | |
56 | #define XFS_BLF_GDQUOT_BUF 0x10 | |
1da177e4 | 57 | |
c1155410 DC |
58 | #define XFS_BLF_CHUNK 128 |
59 | #define XFS_BLF_SHIFT 7 | |
1da177e4 LT |
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 | |
ccf7c23f | 72 | #define XFS_BLI_INODE_BUF 0x40 |
1da177e4 | 73 | |
0b1b213f CH |
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" }, \ | |
ccf7c23f DC |
80 | { XFS_BLI_STALE_INODE, "STALE_INODE" }, \ |
81 | { XFS_BLI_INODE_BUF, "INODE_BUF" } | |
0b1b213f | 82 | |
1da177e4 LT |
83 | |
84 | #ifdef __KERNEL__ | |
85 | ||
86 | struct xfs_buf; | |
1da177e4 LT |
87 | struct xfs_mount; |
88 | struct xfs_buf_log_item; | |
89 | ||
1da177e4 LT |
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 | */ | |
95 | typedef 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 */ | |
1da177e4 LT |
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 | ||
108 | /* | |
109 | * This structure is used during recovery to record the buf log | |
110 | * items which have been canceled and should not be replayed. | |
111 | */ | |
112 | typedef struct xfs_buf_cancel { | |
113 | xfs_daddr_t bc_blkno; | |
114 | uint bc_len; | |
115 | int bc_refcount; | |
116 | struct xfs_buf_cancel *bc_next; | |
117 | } xfs_buf_cancel_t; | |
118 | ||
119 | void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); | |
120 | void xfs_buf_item_relse(struct xfs_buf *); | |
121 | void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); | |
122 | uint xfs_buf_item_dirty(xfs_buf_log_item_t *); | |
123 | void xfs_buf_attach_iodone(struct xfs_buf *, | |
124 | void(*)(struct xfs_buf *, xfs_log_item_t *), | |
125 | xfs_log_item_t *); | |
126 | void xfs_buf_iodone_callbacks(struct xfs_buf *); | |
ca30b2a7 | 127 | void xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *); |
1da177e4 LT |
128 | |
129 | #ifdef XFS_TRANS_DEBUG | |
130 | void | |
131 | xfs_buf_item_flush_log_debug( | |
132 | struct xfs_buf *bp, | |
133 | uint first, | |
134 | uint last); | |
135 | #else | |
136 | #define xfs_buf_item_flush_log_debug(bp, first, last) | |
137 | #endif | |
138 | ||
139 | #endif /* __KERNEL__ */ | |
140 | ||
141 | #endif /* __XFS_BUF_ITEM_H__ */ |