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btrfs-progs: convert: check source file system state 

Signed-off-by: Lakshmipathi.G <Lakshmipathi.G@giis.co.in>
[ add doc note ]
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Lakshmipathi.G 2016-09-15 14:08:52 +02:00 committed by David Sterba
parent 2a9daceb07
commit b56fe16922
2 changed files with 18 additions and 0 deletions
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3
Documentation/btrfs-convert.asciidoc
View File

@ -33,6 +33,9 @@ have supported data block size (ie. the same that would be valid for
'mkfs.btrfs'). This is typically the system page size (4KiB on x86_64
machines).
NOTE: The source filesystem should be clean, you are encouraged to run the
'fsck' tool if you're not sure.
**REMOVE THE ORIGINAL FILESYSTEM METADATA**
By removing the 'ext2_saved' subvolume, all metadata of the original filesystem

15
btrfs-convert.c
View File

@ -2183,6 +2183,17 @@ static void ext2_copy_inode_item(struct btrfs_inode_item *dst,
}
memset(&dst->reserved, 0, sizeof(dst->reserved));
}
static int check_filesystem_state(struct btrfs_convert_context *cctx)
{
ext2_filsys fs = cctx->fs_data;
if (!(fs->super->s_state & EXT2_VALID_FS))
return 1;
else if (fs->super->s_state & EXT2_ERROR_FS)
return 1;
else
return 0;
}
/*
* copy a single inode. do all the required works, such as cloning
@ -2352,6 +2363,10 @@ static int do_convert(const char *devname, int datacsum, int packing,
ret = convert_open_fs(devname, &cctx);
if (ret)
goto fail;
ret = check_filesystem_state(&cctx);
if (ret)
warning(
"source filesystem is not clean, running filesystem check is recommended");
ret = convert_read_used_space(&cctx);
if (ret)
goto fail;