Release 4.18 fs/ext4/fsmap.h

// 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__ */
Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
Darrick J. Wong
202
99.02%
1
50.00%
Theodore Y. Ts'o
2
0.98%
1
50.00%
Total
204
100.00%
2
100.00%
Directory: fs/ext4

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.