projects / linux.git / blame
| 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 | ||
| 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 | */ | |
| 29 | typedef struct xfs_buf_log_format_t { | |
| 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_BLI_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_BLI_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_BLI_UDQUOT_BUF 0x4 | |
| c8ad20ff | 55 | #define XFS_BLI_PDQUOT_BUF 0x8 |
| 1da177e4 LT |
56 | #define XFS_BLI_GDQUOT_BUF 0x10 |
| 57 | ||
| 58 | #define XFS_BLI_CHUNK 128 | |
| 59 | #define XFS_BLI_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 | ||
| 73 | ||
| 74 | #ifdef __KERNEL__ | |
| 75 | ||
| 76 | struct xfs_buf; | |
| 77 | struct ktrace; | |
| 78 | struct xfs_mount; | |
| 79 | struct xfs_buf_log_item; | |
| 80 | ||
| 81 | #if defined(XFS_BLI_TRACE) | |
| 82 | #define XFS_BLI_TRACE_SIZE 32 | |
| 83 | ||
| 84 | void xfs_buf_item_trace(char *, struct xfs_buf_log_item *); | |
| 85 | #else | |
| 86 | #define xfs_buf_item_trace(id, bip) | |
| 87 | #endif | |
| 88 | ||
| 89 | /* | |
| 90 | * This is the in core log item structure used to track information | |
| 91 | * needed to log buffers. It tracks how many times the lock has been | |
| 92 | * locked, and which 128 byte chunks of the buffer are dirty. | |
| 93 | */ | |
| 94 | typedef struct xfs_buf_log_item { | |
| 95 | xfs_log_item_t bli_item; /* common item structure */ | |
| 96 | struct xfs_buf *bli_buf; /* real buffer pointer */ | |
| 97 | unsigned int bli_flags; /* misc flags */ | |
| 98 | unsigned int bli_recur; /* lock recursion count */ | |
| 99 | atomic_t bli_refcount; /* cnt of tp refs */ | |
| 100 | #ifdef XFS_BLI_TRACE | |
| 101 | struct ktrace *bli_trace; /* event trace buf */ | |
| 102 | #endif | |
| 103 | #ifdef XFS_TRANS_DEBUG | |
| 104 | char *bli_orig; /* original buffer copy */ | |
| 105 | char *bli_logged; /* bytes logged (bitmap) */ | |
| 106 | #endif | |
| 107 | xfs_buf_log_format_t bli_format; /* in-log header */ | |
| 108 | } xfs_buf_log_item_t; | |
| 109 | ||
| 110 | /* | |
| 111 | * This structure is used during recovery to record the buf log | |
| 112 | * items which have been canceled and should not be replayed. | |
| 113 | */ | |
| 114 | typedef struct xfs_buf_cancel { | |
| 115 | xfs_daddr_t bc_blkno; | |
| 116 | uint bc_len; | |
| 117 | int bc_refcount; | |
| 118 | struct xfs_buf_cancel *bc_next; | |
| 119 | } xfs_buf_cancel_t; | |
| 120 | ||
| 121 | void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *); | |
| 122 | void xfs_buf_item_relse(struct xfs_buf *); | |
| 123 | void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint); | |
| 124 | uint xfs_buf_item_dirty(xfs_buf_log_item_t *); | |
| 125 | void xfs_buf_attach_iodone(struct xfs_buf *, | |
| 126 | void(*)(struct xfs_buf *, xfs_log_item_t *), | |
| 127 | xfs_log_item_t *); | |
| 128 | void xfs_buf_iodone_callbacks(struct xfs_buf *); | |
| 129 | void xfs_buf_iodone(struct xfs_buf *, xfs_buf_log_item_t *); | |
| 130 | ||
| 131 | #ifdef XFS_TRANS_DEBUG | |
| 132 | void | |
| 133 | xfs_buf_item_flush_log_debug( | |
| 134 | struct xfs_buf *bp, | |
| 135 | uint first, | |
| 136 | uint last); | |
| 137 | #else | |
| 138 | #define xfs_buf_item_flush_log_debug(bp, first, last) | |
| 139 | #endif | |
| 140 | ||
| 141 | #endif /* __KERNEL__ */ | |
| 142 | ||
| 143 | #endif /* __XFS_BUF_ITEM_H__ */ |