/*
* 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 __EXT4_FSMAP_H__
#define __EXT4_FSMAP_H__
struct fsmap;
/* internal fsmap representation */
struct ext4_fsmap {
struct list_head fmr_list;
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 */
uint64_t fmr_length; /* length of segment, blocks */
};
struct ext4_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 ext4_fsmap fmh_keys[2]; /* low and high keys */
};
void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest,
struct ext4_fsmap *src);
void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest,
struct fsmap *src);
/* fsmap to userspace formatter - copy to user & advance pointer */
typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *);
int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
ext4_fsmap_format_t formatter, void *arg);
#define EXT4_QUERY_RANGE_ABORT 1
#define EXT4_QUERY_RANGE_CONTINUE 0
/* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */
#define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */
#define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */
#define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */
#define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */
#define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */
#define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */
#define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */
#define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */
#define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */
#endif /* __EXT4_FSMAP_H__ */
