mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-05 10:04:12 +08:00
e89c041338
Introduce a new ioctl that uses the reverse mapping btree to return information about the physical layout of the filesystem. Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com> Reviewed-by: Brian Foster <bfoster@redhat.com>
54 lines
1.9 KiB
C
54 lines
1.9 KiB
C
/*
|
|
* Copyright (C) 2017 Oracle. All Rights Reserved.
|
|
*
|
|
* Author: Darrick J. Wong <darrick.wong@oracle.com>
|
|
*
|
|
* 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; either version 2
|
|
* of the License, or (at your option) any later version.
|
|
*
|
|
* 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_FSMAP_H__
|
|
#define __XFS_FSMAP_H__
|
|
|
|
struct fsmap;
|
|
|
|
/* internal fsmap representation */
|
|
struct xfs_fsmap {
|
|
dev_t fmr_device; /* device id */
|
|
uint32_t fmr_flags; /* mapping flags */
|
|
uint64_t fmr_physical; /* device offset of segment */
|
|
uint64_t fmr_owner; /* owner id */
|
|
xfs_fileoff_t fmr_offset; /* file offset of segment */
|
|
xfs_filblks_t fmr_length; /* length of segment, blocks */
|
|
};
|
|
|
|
struct xfs_fsmap_head {
|
|
uint32_t fmh_iflags; /* control flags */
|
|
uint32_t fmh_oflags; /* output flags */
|
|
unsigned int fmh_count; /* # of entries in array incl. input */
|
|
unsigned int fmh_entries; /* # of entries filled in (output). */
|
|
|
|
struct xfs_fsmap fmh_keys[2]; /* low and high keys */
|
|
};
|
|
|
|
void xfs_fsmap_from_internal(struct fsmap *dest, struct xfs_fsmap *src);
|
|
void xfs_fsmap_to_internal(struct xfs_fsmap *dest, struct fsmap *src);
|
|
|
|
/* fsmap to userspace formatter - copy to user & advance pointer */
|
|
typedef int (*xfs_fsmap_format_t)(struct xfs_fsmap *, void *);
|
|
|
|
int xfs_getfsmap(struct xfs_mount *mp, struct xfs_fsmap_head *head,
|
|
xfs_fsmap_format_t formatter, void *arg);
|
|
|
|
#endif /* __XFS_FSMAP_H__ */
|