mirror of
https://github.com/torvalds/linux.git
synced 2024-11-01 13:03:25 +01:00
ee00d6b3c7
While debugging fstest ext4/027 failure, found below comment to be wrong and confusing. Hence fix it while we are at it. Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com> Reviewed-by: Darrick J. Wong <djwong@kernel.org> Link: https://lore.kernel.org/r/e79134132db7ea42f15747b5c669ee91cc1aacdf.1622432690.git.riteshh@linux.ibm.com Signed-off-by: Theodore Ts'o <tytso@mit.edu>
56 lines
2 KiB
C
56 lines
2 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) /* block bitmap */
|
|
#define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* inode bitmap */
|
|
|
|
#endif /* __EXT4_FSMAP_H__ */
|