| Theodore Ts'o | f516676 | 2017-12-17 22:00:59 -0500 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| Darrick J. Wong | 0c9ec4b | 2017-04-30 00:36:53 -0400 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C) 2017 Oracle. All Rights Reserved. |
| 4 | * |
| 5 | * Author: Darrick J. Wong <darrick.wong@oracle.com> |
| Darrick J. Wong | 0c9ec4b | 2017-04-30 00:36:53 -0400 | [diff] [blame] | 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__ */ |