It was fixed by Wei Yongjun
http://marc.info/?l=linux-btrfs&m=136910396606489&w=2
Thanks
Miao
On tue, 18 Jun 2013 22:57:41 +0100, Djalal Harouni wrote:
> btrfs_check_trunc_cache_free_space() tries to check if there is enough
> space for cache inode truncation but it fails.
>
> Currently this function always returns success even if there is no
> enough space. Fix this by returning the -ENOSPC error code.
>
> Signed-off-by: Djalal Harouni <tix...@opendz.org>
> ---
> Totally untested code.
>
> fs/btrfs/free-space-cache.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
>
> diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
> index 2750b50..9629830 100644
> --- a/fs/btrfs/free-space-cache.c
> +++ b/fs/btrfs/free-space-cache.c
> @@ -201,7 +201,7 @@ int btrfs_check_trunc_cache_free_space(struct btrfs_root
> *root,
> struct btrfs_block_rsv *rsv)
> {
> u64 needed_bytes;
> - int ret;
> + int ret = 0;
>
> /* 1 for slack space, 1 for updating the inode */
> needed_bytes = btrfs_calc_trunc_metadata_size(root, 1) +
> @@ -210,10 +210,10 @@ int btrfs_check_trunc_cache_free_space(struct
> btrfs_root *root,
> spin_lock(&rsv->lock);
> if (rsv->reserved < needed_bytes)
> ret = -ENOSPC;
> - else
> - ret = 0;
> +
> spin_unlock(&rsv->lock);
> - return 0;
> +
> + return ret;
> }
>
> int btrfs_truncate_free_space_cache(struct btrfs_root *root,
>
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