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brintos / linux-shallow public Read only

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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