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Re: [PATCH 1/4] xfs: fix sb_meta_uuid usage

To: Dave Chinner <david@xxxxxxxxxxxxx>, xfs@xxxxxxxxxxx
Subject: Re: [PATCH 1/4] xfs: fix sb_meta_uuid usage
From: Eric Sandeen <sandeen@xxxxxxxxxxx>
Date: Mon, 03 Aug 2015 09:12:15 -0700
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1438587625-31437-2-git-send-email-david@xxxxxxxxxxxxx>
References: <1438587625-31437-1-git-send-email-david@xxxxxxxxxxxxx> <1438587625-31437-2-git-send-email-david@xxxxxxxxxxxxx>
On 8/3/15 12:40 AM, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
> 
> After changing the UUID on a v5 filesystem, xfstests fails
> immediately on a debug kernel with:
> 
> XFS: Assertion failed: uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_uuid), file: 
> fs/xfs/xfs_inode.c, line: 799
> 
> This needs to check against the sb_meta_uuid, not the user visible
> UUID that was changed.
> 
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>

first of a few brown paper bags for me :(  I guess I didn't test on debug after 
all.  :(

Reviewed-by: Eric Sandeen <sandeen@xxxxxxxxxx>

> ---
>  fs/xfs/xfs_inode.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
> index fb52ff0..4156e37 100644
> --- a/fs/xfs/xfs_inode.c
> +++ b/fs/xfs/xfs_inode.c
> @@ -796,7 +796,7 @@ xfs_ialloc(
>  
>       if (ip->i_d.di_version == 3) {
>               ASSERT(ip->i_d.di_ino == ino);
> -             ASSERT(uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_uuid));
> +             ASSERT(uuid_equal(&ip->i_d.di_uuid, &mp->m_sb.sb_meta_uuid));
>               ip->i_d.di_crc = 0;
>               ip->i_d.di_changecount = 1;
>               ip->i_d.di_lsn = 0;
> 

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