57 lines
2.0 KiB
C
57 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Copyright (C) 2017 Oracle. All Rights Reserved.
|
|
*
|
|
* Author: Darrick J. Wong <darrick.wong@oracle.com>
|
|
*/
|
|
#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__ */
|