On Thu, Feb 12, 2015 at 09:49:59AM -0500, Josef Bacik wrote:
> For newly restored metadumps we can actually mount the fs and use it properly
> except that the data obviously doesn't match properly. To get around this make
> us skip csum validation if the metadump_v2 flag is set on the fs, this will
> allow us to reproduce balance issues with metadumps. Thanks,
>
> Signed-off-by: Josef Bacik <jbacik@xxxxxx>
> ---
> fs/btrfs/ctree.h | 1 +
> fs/btrfs/inode.c | 4 ++++
> 2 files changed, 5 insertions(+)
>
> diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
> index 1675602..bc16147 100644
> --- a/fs/btrfs/ctree.h
> +++ b/fs/btrfs/ctree.h
> @@ -356,6 +356,7 @@ static inline unsigned long btrfs_chunk_item_size(int num_stripes)
>
> #define BTRFS_SUPER_FLAG_SEEDING (1ULL << 32)
> #define BTRFS_SUPER_FLAG_METADUMP (1ULL << 33)
> +#define BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34)
>
> #define BTRFS_BACKREF_REV_MAX 256
> #define BTRFS_BACKREF_REV_SHIFT 56
> diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
> index 4564975..70d0af8 100644
> --- a/fs/btrfs/inode.c
> +++ b/fs/btrfs/inode.c
> @@ -3039,6 +3039,10 @@ static int btrfs_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
> if (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM)
> return 0;
>
Please add the text from changelog here as a comment, the flag is not
really selfexplanatory.
> + if (btrfs_super_flags(root->fs_info->super_copy) &
> + BTRFS_SUPER_FLAG_METADUMP_V2)
> + return 0;
> +
> if (root->root_key.objectid == BTRFS_DATA_RELOC_TREE_OBJECTID &&
> test_range_bit(io_tree, start, end, EXTENT_NODATASUM, 1, NULL)) {
> clear_extent_bits(io_tree, start, end, EXTENT_NODATASUM,
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