1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (C) 2017 Oracle. All Rights Reserved. 4 * 5 * Author: Darrick J. Wong <darrick.wong@oracle.com> 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) /* block bitmap */ 54 #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* inode bitmap */ 55 56 #endif /* __EXT4_FSMAP_H__ */ 57