1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0+ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Copyright (C) 2017 Oracle. All Rights Reserved. 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Author: Darrick J. Wong <darrick.wong@oracle.com> 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun #ifndef __EXT4_FSMAP_H__ 8*4882a593Smuzhiyun #define __EXT4_FSMAP_H__ 9*4882a593Smuzhiyun 10*4882a593Smuzhiyun struct fsmap; 11*4882a593Smuzhiyun 12*4882a593Smuzhiyun /* internal fsmap representation */ 13*4882a593Smuzhiyun struct ext4_fsmap { 14*4882a593Smuzhiyun struct list_head fmr_list; 15*4882a593Smuzhiyun dev_t fmr_device; /* device id */ 16*4882a593Smuzhiyun uint32_t fmr_flags; /* mapping flags */ 17*4882a593Smuzhiyun uint64_t fmr_physical; /* device offset of segment */ 18*4882a593Smuzhiyun uint64_t fmr_owner; /* owner id */ 19*4882a593Smuzhiyun uint64_t fmr_length; /* length of segment, blocks */ 20*4882a593Smuzhiyun }; 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun struct ext4_fsmap_head { 23*4882a593Smuzhiyun uint32_t fmh_iflags; /* control flags */ 24*4882a593Smuzhiyun uint32_t fmh_oflags; /* output flags */ 25*4882a593Smuzhiyun unsigned int fmh_count; /* # of entries in array incl. input */ 26*4882a593Smuzhiyun unsigned int fmh_entries; /* # of entries filled in (output). */ 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun struct ext4_fsmap fmh_keys[2]; /* low and high keys */ 29*4882a593Smuzhiyun }; 30*4882a593Smuzhiyun 31*4882a593Smuzhiyun void ext4_fsmap_from_internal(struct super_block *sb, struct fsmap *dest, 32*4882a593Smuzhiyun struct ext4_fsmap *src); 33*4882a593Smuzhiyun void ext4_fsmap_to_internal(struct super_block *sb, struct ext4_fsmap *dest, 34*4882a593Smuzhiyun struct fsmap *src); 35*4882a593Smuzhiyun 36*4882a593Smuzhiyun /* fsmap to userspace formatter - copy to user & advance pointer */ 37*4882a593Smuzhiyun typedef int (*ext4_fsmap_format_t)(struct ext4_fsmap *, void *); 38*4882a593Smuzhiyun 39*4882a593Smuzhiyun int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head, 40*4882a593Smuzhiyun ext4_fsmap_format_t formatter, void *arg); 41*4882a593Smuzhiyun 42*4882a593Smuzhiyun #define EXT4_QUERY_RANGE_ABORT 1 43*4882a593Smuzhiyun #define EXT4_QUERY_RANGE_CONTINUE 0 44*4882a593Smuzhiyun 45*4882a593Smuzhiyun /* fmr_owner special values for FS_IOC_GETFSMAP; some share w/ XFS */ 46*4882a593Smuzhiyun #define EXT4_FMR_OWN_FREE FMR_OWN_FREE /* free space */ 47*4882a593Smuzhiyun #define EXT4_FMR_OWN_UNKNOWN FMR_OWN_UNKNOWN /* unknown owner */ 48*4882a593Smuzhiyun #define EXT4_FMR_OWN_FS FMR_OWNER('X', 1) /* static fs metadata */ 49*4882a593Smuzhiyun #define EXT4_FMR_OWN_LOG FMR_OWNER('X', 2) /* journalling log */ 50*4882a593Smuzhiyun #define EXT4_FMR_OWN_INODES FMR_OWNER('X', 5) /* inodes */ 51*4882a593Smuzhiyun #define EXT4_FMR_OWN_GDT FMR_OWNER('f', 1) /* group descriptors */ 52*4882a593Smuzhiyun #define EXT4_FMR_OWN_RESV_GDT FMR_OWNER('f', 2) /* reserved gdt blocks */ 53*4882a593Smuzhiyun #define EXT4_FMR_OWN_BLKBM FMR_OWNER('f', 3) /* inode bitmap */ 54*4882a593Smuzhiyun #define EXT4_FMR_OWN_INOBM FMR_OWNER('f', 4) /* block bitmap */ 55*4882a593Smuzhiyun 56*4882a593Smuzhiyun #endif /* __EXT4_FSMAP_H__ */ 57