linux-kernel - Re: [PATCH] btrfs: Return EXDEV for cross file system snapshot

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Date:	Tue, 28 Jan 2014 10:45:51 -0500
From:	Josef Bacik <jbacik@...com>
To:	Kusanagi Kouichi <slash@...auone-net.jp>,
	<linux-btrfs@...r.kernel.org>
CC:	<linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] btrfs: Return EXDEV for cross file system snapshot


On 01/08/2014 05:46 AM, Kusanagi Kouichi wrote:
> EXDEV seems an appropriate error if an operation fails bacause it
> crosses file system boundaries.
>
> Signed-off-by: Kusanagi Kouichi <slash@...auone-net.jp>
> ---
>   fs/btrfs/ioctl.c | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
> index 21da576..15d35cb 100644
> --- a/fs/btrfs/ioctl.c
> +++ b/fs/btrfs/ioctl.c
> @@ -1544,7 +1544,7 @@ static noinline int btrfs_ioctl_snap_create_transid(struct file *file,
>   		if (src_inode->i_sb != file_inode(file)->i_sb) {
>   			printk(KERN_INFO "btrfs: Snapshot src from "
>   			       "another FS\n");
> -			ret = -EINVAL;
> +			ret = -EXDEV;
>   		} else {
>   			ret = btrfs_mksubvol(&file->f_path, name, namelen,
>   					     BTRFS_I(src_inode)->root,
Doesn't apply cleanly to btrfs-next, please rebase and try again. Thanks,

Josef
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