ext4: support GETFSMAP ioctls

obj-$(CONFIG_EXT4_FS) += ext4.o

ext4-y	:= balloc.o bitmap.o dir.o file.o fsync.o ialloc.o inode.o page-io.o \

		ioctl.o namei.o super.o symlink.o hash.o resize.o extents.o \

		ext4_jbd2.o migrate.o mballoc.o block_validity.o move_extent.o \

		mmp.o indirect.o extents_status.o xattr.o xattr_user.o \

		xattr_trusted.o inline.o readpage.o sysfs.o

ext4-y	:= balloc.o bitmap.o block_validity.o dir.o ext4_jbd2.o extents.o \

		extents_status.o file.o fsmap.o fsync.o hash.o ialloc.o \

		indirect.o inline.o inode.o ioctl.o mballoc.o migrate.o \

		mmp.o move_extent.o namei.o page-io.o readpage.o resize.o \

		super.o symlink.o sysfs.o xattr.o xattr_trusted.o xattr_user.o

ext4-$(CONFIG_EXT4_FS_POSIX_ACL)	+= acl.o

ext4-$(CONFIG_EXT4_FS_SECURITY)		+= xattr_security.o

/*

 * Copyright (C) 2017 Oracle.  All Rights Reserved.

 *

 * Author: Darrick J. Wong <darrick.wong@oracle.com>

 *

 * This program is free software; you can redistribute it and/or

 * modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2

 * of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it would be useful,

 * but WITHOUT ANY WARRANTY; without even the implied warranty of

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 * GNU General Public License for more details.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program; if not, write the Free Software Foundation,

 * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301, USA.

 */

#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__ */