btrfs-progs/convert/source-ext2.h
Jeff Mahoney 36da47b409 btrfs-progs: convert: fix support for e2fsprogs < 1.42
Commit 324d4c1857 (btrfs-progs: convert: Add larger device support)
introduced new dependencies on the 64-bit API provided by e2fsprogs.
That API was introduced in v1.42 (along with bigalloc).

This patch maps the following to their equivalents in e2fsprogs < 1.42.
- ext2fs_get_block_bitmap_range2
- ext2fs_inode_data_blocks2
- ext2fs_read_ext_attr2

Since we need to detect and define EXT2_FLAG_64BITS for compatibilty
anyway, it makes sense to use that to detect the older e2fsprogs instead
of defining a new flag ourselves.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2018-06-07 16:37:35 +02:00

82 lines
2.6 KiB
C

/*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License v2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will 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 to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 021110-1307, USA.
*/
#ifndef __BTRFS_CONVERT_SOURCE_EXT2_H__
#define __BTRFS_CONVERT_SOURCE_EXT2_H__
#if BTRFSCONVERT_EXT2
#include "kerncompat.h"
#include <ext2fs/ext2_fs.h>
#include <ext2fs/ext2fs.h>
#include <ext2fs/ext2_ext_attr.h>
#include "convert/source-fs.h"
#define INO_OFFSET (BTRFS_FIRST_FREE_OBJECTID - EXT2_ROOT_INO)
/*
* Compatibility code for e2fsprogs 1.41 which doesn't support RO compat flag
* BIGALLOC.
* Unlike normal RO compat flag, BIGALLOC affects how e2fsprogs check used
* space, and btrfs-convert heavily relies on it.
*
* e2fsprogs 1.42 also introduced the 64-bit API. Any file system
* that requires it will have EXT4_FEATURE_INCOMPAT_64BIT set and
* will fail to open with earlier releases. We can map it to the
* older API without risk of corruption.
*/
#ifndef EXT2_FLAG_64BITS
#define EXT2_FLAG_64BITS (0)
#define ext2fs_get_block_bitmap_range2 ext2fs_get_block_bitmap_range
#define ext2fs_inode_data_blocks2 ext2fs_inode_data_blocks
#define ext2fs_read_ext_attr2 ext2fs_read_ext_attr
#define ext2fs_blocks_count(s) ((s)->s_blocks_count)
#define EXT2FS_CLUSTER_RATIO(fs) (1)
#define EXT2_CLUSTERS_PER_GROUP(s) (EXT2_BLOCKS_PER_GROUP(s))
#define EXT2FS_B2C(fs, blk) (blk)
#endif
/*
* Following xattr/acl related codes are based on codes in
* fs/ext3/xattr.c and fs/ext3/acl.c
*/
#define EXT2_XATTR_BHDR(ptr) ((struct ext2_ext_attr_header *)(ptr))
#define EXT2_XATTR_BFIRST(ptr) \
((struct ext2_ext_attr_entry *)(EXT2_XATTR_BHDR(ptr) + 1))
#define EXT2_XATTR_IHDR(inode) \
((struct ext2_ext_attr_header *) ((void *)(inode) + \
EXT2_GOOD_OLD_INODE_SIZE + (inode)->i_extra_isize))
#define EXT2_XATTR_IFIRST(inode) \
((struct ext2_ext_attr_entry *) ((void *)EXT2_XATTR_IHDR(inode) + \
sizeof(EXT2_XATTR_IHDR(inode)->h_magic)))
struct dir_iterate_data {
struct btrfs_trans_handle *trans;
struct btrfs_root *root;
struct btrfs_inode_item *inode;
u64 objectid;
u64 index_cnt;
u64 parent;
int errcode;
};
#define EXT2_ACL_VERSION 0x0001
#endif /* BTRFSCONVERT_EXT2 */
#endif