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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 10struct fsmap;11 12/* internal fsmap representation */13struct 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 22struct 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 31void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest,32 struct ext4_fsmap *src);33void 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 */37typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *);38 39int 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 143#define EXT4_QUERY_RANGE_CONTINUE 044 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