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btrfs-progs: don't remove BTRFS_BLOCK_GROUP_DUP in chunk type 

During restoring of image (-r using btrfs-image) we zero out RAID
profile in chunk type but forget to save BTRFS_BLOCK_GROUP_DUP if
present. This results in some false messages being printed by btrfsck.

$  ./mkfs.btrfs /dev/sdb2 -f
$  ./btrfs-image /dev/sdb2 btrfs_image_output
$  ./btrfs-image -r btrfs_image_output disk-image
$  ./btrfsck disk-image
Checking filesystem on disk-image
UUID: e644be2d-7701-4bd4-8804-7487f560d2a7
checking extents
Chunk[256, 228, 20971520]: length(8388608), offset(20971520), type(2) mismatch with block group[20971520, 192, 8388608]: offset(8388608), objectid(20971520), flags(34)
Chunk[256, 228, 29360128]: length(1073741824), offset(29360128), type(4) mismatch with block group[29360128, 192, 1073741824]: offset(1073741824), objectid(29360128), flags(36)
Block group[20971520, 8388608] (flags = 34) didn't find the relative chunk.
Block group[29360128, 1073741824] (flags = 36) didn't find the relative chunk.

Even though ./btrfsck on /dev/sdb2 seemed fine. This is due to type
mismatch above and type mismatch occured because we zero'ed out
BTRFS_BLOCK_GROUP_DUP while handling chunk trees.

Signed-off-by: Rakesh Pandit <rakesh@tuxera.com>
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
This commit is contained in:
Rakesh Pandit 2014-02-20 16:44:30 +02:00 committed by Chris Mason
parent 4701f52390
commit 57a898dc50
1 changed files with 2 additions and 1 deletions
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3
btrfs-image.c
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@ -1521,7 +1521,8 @@ static int fixup_chunk_tree_block(struct mdrestore_struct *mdres,
type = btrfs_stack_chunk_type(&chunk);
type &= (BTRFS_BLOCK_GROUP_DATA |
BTRFS_BLOCK_GROUP_SYSTEM |
BTRFS_BLOCK_GROUP_METADATA);
BTRFS_BLOCK_GROUP_METADATA |
BTRFS_BLOCK_GROUP_DUP);
btrfs_set_stack_chunk_type(&chunk, type);
btrfs_set_stack_chunk_num_stripes(&chunk, 1);