projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| f5166768 | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 0c9ec4be DW |
2 | /* |
| 3 | * Copyright (C) 2017 Oracle. All Rights Reserved. | |
| 4 | * | |
| 5 | * Author: Darrick J. Wong <[email protected]> | |
| 0c9ec4be DW |
6 | */ |
| 7 | #ifndef __EXT4_FSMAP_H__ | |
| 8 | #define __EXT4_FSMAP_H__ | |
| 9 | ||
| 10 | struct fsmap; | |
| 11 | ||
| 12 | /* internal fsmap representation */ | |
| 13 | struct ext4_fsmap { | |
| 14 | struct list_head fmr_list; | |
| 15 | dev_t fmr_device; /* device id */ | |
| 16 | uint32_t fmr_flags; /* mapping flags */ | |
| 17 | uint64_t fmr_physical; /* device offset of segment */ | |
| 18 | uint64_t fmr_owner; /* owner id */ | |
| 19 | uint64_t fmr_length; /* length of segment, blocks */ | |
| 20 | }; | |
| 21 | ||
| 22 | struct ext4_fsmap_head { | |
| 23 | uint32_t fmh_iflags; /* control flags */ | |
| 24 | uint32_t fmh_oflags; /* output flags */ | |
| 25 | unsigned int fmh_count; /* # of entries in array incl. input */ | |
| 26 | unsigned int fmh_entries; /* # of entries filled in (output). */ | |
| 27 | ||
| 28 | struct ext4_fsmap fmh_keys[2]; /* low and high keys */ | |
| 29 | }; | |
| 30 | ||
| 31 | void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, | |
| 32 | struct ext4_fsmap *src); | |
| 33 | void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, | |
| 34 | struct fsmap *src); | |
| 35 | ||
| 36 | /* fsmap to userspace formatter - copy to user & advance pointer */ | |
| 37 | typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); | |
| 38 | ||
| 39 | int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, | |
| 40 | ext4_fsmap_format_t formatter, void *arg); | |
| 41 | ||
| 42 | #define EXT4_QUERY_RANGE_ABORT 1 | |
| 43 | #define EXT4_QUERY_RANGE_CONTINUE 0 | |
| 44 | ||
| 45 | /* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ | |
| 46 | #define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ | |
| 47 | #define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ | |
| 48 | #define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ | |
| 49 | #define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ | |
| 50 | #define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ | |
| 51 | #define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ | |
| 52 | #define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ | |
| 53 | #define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */ | |
| 54 | #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */ | |
| 55 | ||
| 56 | #endif /* __EXT4_FSMAP_H__ */ |