1f5166768STheodore Ts'o // SPDX-License-Identifier: GPL-2.0+ 20c9ec4beSDarrick J. Wong /* 30c9ec4beSDarrick J. Wong * Copyright (C) 2017 Oracle. All Rights Reserved. 40c9ec4beSDarrick J. Wong * 50c9ec4beSDarrick J. Wong * Author: Darrick J. Wong <darrick.wong@oracle.com> 60c9ec4beSDarrick J. Wong */ 70c9ec4beSDarrick J. Wong #ifndef __EXT4_FSMAP_H__ 80c9ec4beSDarrick J. Wong #define __EXT4_FSMAP_H__ 90c9ec4beSDarrick J. Wong 100c9ec4beSDarrick J. Wong struct fsmap; 110c9ec4beSDarrick J. Wong 120c9ec4beSDarrick J. Wong /* internal fsmap representation */ 130c9ec4beSDarrick J. Wong struct ext4_fsmap { 140c9ec4beSDarrick J. Wong struct list_head fmr_list; 150c9ec4beSDarrick J. Wong dev_t fmr_device; /* device id */ 160c9ec4beSDarrick J. Wong uint32_t fmr_flags; /* mapping flags */ 170c9ec4beSDarrick J. Wong uint64_t fmr_physical; /* device offset of segment */ 180c9ec4beSDarrick J. Wong uint64_t fmr_owner; /* owner id */ 190c9ec4beSDarrick J. Wong uint64_t fmr_length; /* length of segment, blocks */ 200c9ec4beSDarrick J. Wong }; 210c9ec4beSDarrick J. Wong 220c9ec4beSDarrick J. Wong struct ext4_fsmap_head { 230c9ec4beSDarrick J. Wong uint32_t fmh_iflags; /* control flags */ 240c9ec4beSDarrick J. Wong uint32_t fmh_oflags; /* output flags */ 250c9ec4beSDarrick J. Wong unsigned int fmh_count; /* # of entries in array incl. input */ 260c9ec4beSDarrick J. Wong unsigned int fmh_entries; /* # of entries filled in (output). */ 270c9ec4beSDarrick J. Wong 280c9ec4beSDarrick J. Wong struct ext4_fsmap fmh_keys[2]; /* low and high keys */ 290c9ec4beSDarrick J. Wong }; 300c9ec4beSDarrick J. Wong 310c9ec4beSDarrick J. Wong void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, 320c9ec4beSDarrick J. Wong struct ext4_fsmap *src); 330c9ec4beSDarrick J. Wong void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, 340c9ec4beSDarrick J. Wong struct fsmap *src); 350c9ec4beSDarrick J. Wong 360c9ec4beSDarrick J. Wong /* fsmap to userspace formatter - copy to user & advance pointer */ 370c9ec4beSDarrick J. Wong typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); 380c9ec4beSDarrick J. Wong 390c9ec4beSDarrick J. Wong int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, 400c9ec4beSDarrick J. Wong ext4_fsmap_format_t formatter, void *arg); 410c9ec4beSDarrick J. Wong 420c9ec4beSDarrick J. Wong #define EXT4_QUERY_RANGE_ABORT 1 430c9ec4beSDarrick J. Wong #define EXT4_QUERY_RANGE_CONTINUE 0 440c9ec4beSDarrick J. Wong 450c9ec4beSDarrick J. Wong /* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ 460c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ 470c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ 480c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ 490c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ 500c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ 510c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ 520c9ec4beSDarrick J. Wong #define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ 53*ee00d6b3SRitesh Harjani #define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* block bitmap */ 54*ee00d6b3SRitesh Harjani #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* inode bitmap */ 550c9ec4beSDarrick J. Wong 560c9ec4beSDarrick J. Wong #endif /* __EXT4_FSMAP_H__ */ 57