xfs_imap.h

linux 内核源代码

/*
 * Copyright (c) 2000,2005 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_IMAP_H__
#define	__XFS_IMAP_H__

/*
 * This is the structure passed to xfs_imap() to map
 * an inode number to its on disk location.
 */
typedef struct xfs_imap {
	xfs_daddr_t	im_blkno;	/* starting BB of inode chunk */
	uint		im_len;		/* length in BBs of inode chunk */
	xfs_agblock_t	im_agblkno;	/* logical block of inode chunk in ag */
	ushort		im_ioffset;	/* inode offset in block in "inodes" */
	ushort		im_boffset;	/* inode offset in block in bytes */
} xfs_imap_t;

#ifdef __KERNEL__
struct xfs_mount;
struct xfs_trans;
int	xfs_imap(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
		 xfs_imap_t *, uint);
#endif

#endif	/* __XFS_IMAP_H__ */