// SPDX-License-Identifier: GPL-2.0+ /* * Copyright (C) 2017 Oracle. All Rights Reserved. * * Author: Darrick J. Wong <darrick.wong@oracle.com> */ #ifndef __EXT4_FSMAP_H__ #define __EXT4_FSMAP_H__ struct fsmap; /* internal fsmap representation */ struct ext4_fsmap { struct list_head fmr_list; dev_t fmr_device; /* device id */ uint32_t fmr_flags; /* mapping flags */ uint64_t fmr_physical; /* device offset of segment */ uint64_t fmr_owner; /* owner id */ uint64_t fmr_length; /* length of segment, blocks */ }; struct ext4_fsmap_head { uint32_t fmh_iflags; /* control flags */ uint32_t fmh_oflags; /* output flags */ unsigned int fmh_count; /* # of entries in array incl. input */ unsigned int fmh_entries; /* # of entries filled in (output). */ struct ext4_fsmap fmh_keys[2]; /* low and high keys */ }; void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, struct ext4_fsmap *src); void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, struct fsmap *src); /* fsmap to userspace formatter - copy to user & advance pointer */ typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, ext4_fsmap_format_t formatter, void *arg); #define EXT4_QUERY_RANGE_ABORT 1 #define EXT4_QUERY_RANGE_CONTINUE 0 /* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ #define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ #define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ #define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ #define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ #define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ #define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ #define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ #define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */ #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */ #endif /* __EXT4_FSMAP_H__ */