Commit | Line | Data |
---|---|---|
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 | ||
21 | /* | |
22 | * This is the structure used to lay out a buf log item in the | |
23 | * log. The data map describes which 128 byte chunks of the buffer | |
24 | * have been logged. This structure works only on buffers that | |
25 | * reside up to the first TB in the filesystem. These buffers are | |
26 | * generated only by pre-6.2 systems and are known as XFS_LI_6_1_BUF. | |
27 | */ | |
28 | typedef struct xfs_buf_log_format_v1 { | |
29 | unsigned short blf_type; /* buf log item type indicator */ | |
30 | unsigned short blf_size; /* size of this item */ | |
31 | __int32_t blf_blkno; /* starting blkno of this buf */ | |
32 | ushort blf_flags; /* misc state */ | |
33 | ushort blf_len; /* number of blocks in this buf */ | |
34 | unsigned int blf_map_size; /* size of data bitmap in words */ | |
35 | unsigned int blf_data_map[1];/* variable size bitmap of */ | |
36 | /* regions of buffer in this item */ | |
37 | } xfs_buf_log_format_v1_t; | |
38 | ||
39 | /* | |
40 | * This is a form of the above structure with a 64 bit blkno field. | |
41 | * For 6.2 and beyond, this is XFS_LI_BUF. We use this to log everything. | |
42 | */ | |
43 | typedef struct xfs_buf_log_format_t { | |
44 | unsigned short blf_type; /* buf log item type indicator */ | |
45 | unsigned short blf_size; /* size of this item */ | |
46 | ushort blf_flags; /* misc state */ | |
47 | ushort blf_len; /* number of blocks in this buf */ | |
48 | __int64_t blf_blkno; /* starting blkno of this buf */ | |
49 | unsigned int blf_map_size; /* size of data bitmap in words */ | |
50 | unsigned int blf_data_map[1];/* variable size bitmap of */ | |
51 | /* regions of buffer in this item */ | |
52 | } xfs_buf_log_format_t; | |
53 | ||
54 | /* | |
55 | * This flag indicates that the buffer contains on disk inodes | |
56 | * and requires special recovery handling. | |
57 | */ | |
58 | #define XFS_BLI_INODE_BUF 0x1 | |
59 | /* | |
60 | * This flag indicates that the buffer should not be replayed | |
61 | * during recovery because its blocks are being freed. | |
62 | */ | |
63 | #define XFS_BLI_CANCEL 0x2 | |
64 | /* | |
65 | * This flag indicates that the buffer contains on disk | |
66 | * user or group dquots and may require special recovery handling. | |
67 | */ | |
68 | #define XFS_BLI_UDQUOT_BUF 0x4 | |
c8ad20ff | 69 | #define XFS_BLI_PDQUOT_BUF 0x8 |
1da177e4 LT |
70 | #define XFS_BLI_GDQUOT_BUF 0x10 |
71 | ||
72 | #define XFS_BLI_CHUNK 128 | |
73 | #define XFS_BLI_SHIFT 7 | |
74 | #define BIT_TO_WORD_SHIFT 5 | |
75 | #define NBWORD (NBBY * sizeof(unsigned int)) | |
76 | ||
77 | /* | |
78 | * buf log item flags | |
79 | */ | |
80 | #define XFS_BLI_HOLD 0x01 | |
81 | #define XFS_BLI_DIRTY 0x02 | |
82 | #define XFS_BLI_STALE 0x04 | |
83 | #define XFS_BLI_LOGGED 0x08 | |
84 | #define XFS_BLI_INODE_ALLOC_BUF 0x10 | |
85 | #define XFS_BLI_STALE_INODE 0x20 | |
86 | ||
87 | ||
88 | #ifdef __KERNEL__ | |
89 | ||
90 | struct xfs_buf; | |
91 | struct ktrace; | |
92 | struct xfs_mount; | |
93 | struct xfs_buf_log_item; | |
94 | ||
95 | #if defined(XFS_BLI_TRACE) | |
96 | #define XFS_BLI_TRACE_SIZE 32 | |
97 | ||
98 | void xfs_buf_item_trace(char *, struct xfs_buf_log_item *); | |
99 | #else | |
100 | #define xfs_buf_item_trace(id, bip) | |
101 | #endif | |
102 | ||
103 | /* | |
104 | * This is the in core log item structure used to track information | |
105 | * needed to log buffers. It tracks how many times the lock has been | |
106 | * locked, and which 128 byte chunks of the buffer are dirty. | |
107 | */ | |
108 | typedef struct xfs_buf_log_item { | |
109 | xfs_log_item_t bli_item; /* common item structure */ | |
110 | struct xfs_buf *bli_buf; /* real buffer pointer */ | |
111 | unsigned int bli_flags; /* misc flags */ | |
112 | unsigned int bli_recur; /* lock recursion count */ | |
113 | atomic_t bli_refcount; /* cnt of tp refs */ | |
114 | #ifdef XFS_BLI_TRACE | |
115 | struct ktrace *bli_trace; /* event trace buf */ | |
116 | #endif | |
117 | #ifdef XFS_TRANS_DEBUG | |
118 | char *bli_orig; /* original buffer copy */ | |
119 | char *bli_logged; /* bytes logged (bitmap) */ | |
120 | #endif | |
121 | xfs_buf_log_format_t bli_format; /* in-log header */ | |
122 | } xfs_buf_log_item_t; | |
123 | ||
124 | /* | |
125 | * This structure is used during recovery to record the buf log | |
126 | * items which have been canceled and should not be replayed. | |
127 | */ | |
128 | typedef struct xfs_buf_cancel { | |
129 | xfs_daddr_t bc_blkno; | |
130 | uint bc_len; | |
131 | int bc_refcount; | |
132 | struct xfs_buf_cancel *bc_next; | |
133 | } xfs_buf_cancel_t; | |
134 | ||
135 | void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); | |
136 | void xfs_buf_item_relse(struct xfs_buf *); | |
137 | void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); | |
138 | uint xfs_buf_item_dirty(xfs_buf_log_item_t *); | |
139 | void xfs_buf_attach_iodone(struct xfs_buf *, | |
140 | void(*)(struct xfs_buf *, xfs_log_item_t *), | |
141 | xfs_log_item_t *); | |
142 | void xfs_buf_iodone_callbacks(struct xfs_buf *); | |
143 | void xfs_buf_iodone(struct xfs_buf *, xfs_buf_log_item_t *); | |
144 | ||
145 | #ifdef XFS_TRANS_DEBUG | |
146 | void | |
147 | xfs_buf_item_flush_log_debug( | |
148 | struct xfs_buf *bp, | |
149 | uint first, | |
150 | uint last); | |
151 | #else | |
152 | #define xfs_buf_item_flush_log_debug(bp, first, last) | |
153 | #endif | |
154 | ||
155 | #endif /* __KERNEL__ */ | |
156 | ||
157 | #endif /* __XFS_BUF_ITEM_H__ */ |