On Tue, Mar 24, 2015 at 06:12:56PM -0400, Chengyu Song wrote:
> fiemap_fill_next_extent returns 0 on success, -errno on error, 1 if this was
> the last extent that will fit in user array. If 1 is returned, the return
> value may eventually returned to user space, which should not happen, according
> to manpage of ioctl.
Reviewed-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
>
> Signed-off-by: Chengyu Song <csong84@xxxxxxxxxx>
> ---
> fs/btrfs/extent_io.c | 5 ++++-
> 1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
> index d688cfe..782f3bc 100644
> --- a/fs/btrfs/extent_io.c
> +++ b/fs/btrfs/extent_io.c
> @@ -4514,8 +4514,11 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
> }
> ret = fiemap_fill_next_extent(fieinfo, em_start, disko,
> em_len, flags);
> - if (ret)
> + if (ret) {
> + if (ret == 1)
> + ret = 0;
> goto out_free;
> + }
> }
> out_free:
> free_extent_map(em);
> --
> 2.1.0
>
> --
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