linux-kernel - Re: [Regression 4.7-rc1] btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs

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Message-ID: <0ea8d8ad-b410-b81b-5732-b5d6beca1d10@fb.com>
Date:   Fri, 6 Jan 2017 15:46:38 -0500
From:   Chris Mason <clm@...com>
To:     Joseph Salisbury <joseph.salisbury@...onical.com>,
        <luke@...hjr.org>
CC:     <luke-jr+git@...pios.org>, <jbacik@...com>, <dsterba@...e.com>,
        <stable@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-btrfs@...r.kernel.org>, <1619918@...s.launchpad.net>
Subject: Re: [Regression 4.7-rc1] btrfs: bugfix: handle
 FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs_ioctl

On 01/06/2017 12:22 PM, Joseph Salisbury wrote:
> Hi Luke,
>
> A kernel bug report was opened against Ubuntu [0].  This bug was fixed
> by the following commit in v4.7-rc1:
>
>
> commit 4c63c2454eff996c5e27991221106eb511f7db38
>
> Author: Luke Dashjr <luke@...hjr.org>
> Date:   Thu Oct 29 08:22:21 2015 +0000
>
>     btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in
> btrfs_ioctl
>
>
> However, this commit introduced a new regression.  With this commit
> applied, "btrfs fi show" no longer works and the btrfs snapshot
> functionality breaks.
>
>
>
> I was hoping to get your feedback, since you are the patch author.  Do
> you think gathering any additional data will help diagnose this issue,
> or would it be best to submit a revert request?

This is working for me, could you please include an strace of the problem?

Thanks!

-chris