804195b63a
Sandeen. SGI-PV: 958736 SGI-Modid: xfs-linux-melb:xfs-kern:27596a Signed-off-by: Eric Sandeen <sandeen@sandeen.net> Signed-off-by: Tim Shimmin <tes@sgi.com>
141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 2000-2001,2005 Silicon Graphics, Inc.
|
|
* All Rights Reserved.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it would be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write the Free Software Foundation,
|
|
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#ifndef __XFS_BUF_ITEM_H__
|
|
#define __XFS_BUF_ITEM_H__
|
|
|
|
/*
|
|
* This is the structure used to lay out a buf log item in the
|
|
* log. The data map describes which 128 byte chunks of the buffer
|
|
* have been logged.
|
|
* For 6.2 and beyond, this is XFS_LI_BUF. We use this to log everything.
|
|
*/
|
|
typedef struct xfs_buf_log_format_t {
|
|
unsigned short blf_type; /* buf log item type indicator */
|
|
unsigned short blf_size; /* size of this item */
|
|
ushort blf_flags; /* misc state */
|
|
ushort blf_len; /* number of blocks in this buf */
|
|
__int64_t blf_blkno; /* starting blkno of this buf */
|
|
unsigned int blf_map_size; /* size of data bitmap in words */
|
|
unsigned int blf_data_map[1];/* variable size bitmap of */
|
|
/* regions of buffer in this item */
|
|
} xfs_buf_log_format_t;
|
|
|
|
/*
|
|
* This flag indicates that the buffer contains on disk inodes
|
|
* and requires special recovery handling.
|
|
*/
|
|
#define XFS_BLI_INODE_BUF 0x1
|
|
/*
|
|
* This flag indicates that the buffer should not be replayed
|
|
* during recovery because its blocks are being freed.
|
|
*/
|
|
#define XFS_BLI_CANCEL 0x2
|
|
/*
|
|
* This flag indicates that the buffer contains on disk
|
|
* user or group dquots and may require special recovery handling.
|
|
*/
|
|
#define XFS_BLI_UDQUOT_BUF 0x4
|
|
#define XFS_BLI_PDQUOT_BUF 0x8
|
|
#define XFS_BLI_GDQUOT_BUF 0x10
|
|
|
|
#define XFS_BLI_CHUNK 128
|
|
#define XFS_BLI_SHIFT 7
|
|
#define BIT_TO_WORD_SHIFT 5
|
|
#define NBWORD (NBBY * sizeof(unsigned int))
|
|
|
|
/*
|
|
* buf log item flags
|
|
*/
|
|
#define XFS_BLI_HOLD 0x01
|
|
#define XFS_BLI_DIRTY 0x02
|
|
#define XFS_BLI_STALE 0x04
|
|
#define XFS_BLI_LOGGED 0x08
|
|
#define XFS_BLI_INODE_ALLOC_BUF 0x10
|
|
#define XFS_BLI_STALE_INODE 0x20
|
|
|
|
|
|
#ifdef __KERNEL__
|
|
|
|
struct xfs_buf;
|
|
struct ktrace;
|
|
struct xfs_mount;
|
|
struct xfs_buf_log_item;
|
|
|
|
#if defined(XFS_BLI_TRACE)
|
|
#define XFS_BLI_TRACE_SIZE 32
|
|
|
|
void xfs_buf_item_trace(char *, struct xfs_buf_log_item *);
|
|
#else
|
|
#define xfs_buf_item_trace(id, bip)
|
|
#endif
|
|
|
|
/*
|
|
* This is the in core log item structure used to track information
|
|
* needed to log buffers. It tracks how many times the lock has been
|
|
* locked, and which 128 byte chunks of the buffer are dirty.
|
|
*/
|
|
typedef struct xfs_buf_log_item {
|
|
xfs_log_item_t bli_item; /* common item structure */
|
|
struct xfs_buf *bli_buf; /* real buffer pointer */
|
|
unsigned int bli_flags; /* misc flags */
|
|
unsigned int bli_recur; /* lock recursion count */
|
|
atomic_t bli_refcount; /* cnt of tp refs */
|
|
#ifdef XFS_BLI_TRACE
|
|
struct ktrace *bli_trace; /* event trace buf */
|
|
#endif
|
|
#ifdef XFS_TRANS_DEBUG
|
|
char *bli_orig; /* original buffer copy */
|
|
char *bli_logged; /* bytes logged (bitmap) */
|
|
#endif
|
|
xfs_buf_log_format_t bli_format; /* in-log header */
|
|
} xfs_buf_log_item_t;
|
|
|
|
/*
|
|
* This structure is used during recovery to record the buf log
|
|
* items which have been canceled and should not be replayed.
|
|
*/
|
|
typedef struct xfs_buf_cancel {
|
|
xfs_daddr_t bc_blkno;
|
|
uint bc_len;
|
|
int bc_refcount;
|
|
struct xfs_buf_cancel *bc_next;
|
|
} xfs_buf_cancel_t;
|
|
|
|
void xfs_buf_item_init(struct xfs_buf *, struct xfs_mount *);
|
|
void xfs_buf_item_relse(struct xfs_buf *);
|
|
void xfs_buf_item_log(xfs_buf_log_item_t *, uint, uint);
|
|
uint xfs_buf_item_dirty(xfs_buf_log_item_t *);
|
|
void xfs_buf_attach_iodone(struct xfs_buf *,
|
|
void(*)(struct xfs_buf *, xfs_log_item_t *),
|
|
xfs_log_item_t *);
|
|
void xfs_buf_iodone_callbacks(struct xfs_buf *);
|
|
void xfs_buf_iodone(struct xfs_buf *, xfs_buf_log_item_t *);
|
|
|
|
#ifdef XFS_TRANS_DEBUG
|
|
void
|
|
xfs_buf_item_flush_log_debug(
|
|
struct xfs_buf *bp,
|
|
uint first,
|
|
uint last);
|
|
#else
|
|
#define xfs_buf_item_flush_log_debug(bp, first, last)
|
|
#endif
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* __XFS_BUF_ITEM_H__ */
|