linux-kernel - Re: Linux 5.2-RC regression bisected, mounting glusterfs volumes fails after commit: fuse: require /dev/fuse reads to have enough buffer capacity

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Date:   Tue, 11 Jun 2019 13:52:14 +0200
From:   Miklos Szeredi <miklos@...redi.hu>
To:     Sander Eikelenboom <linux@...elenboom.it>
Cc:     Kirill Smelkov <kirr@...edi.com>,
        Miklos Szeredi <mszeredi@...hat.com>,
        gluster-devel@...ster.org,
        linux-kernel <linux-kernel@...r.kernel.org>,
        linux-fsdevel@...r.kernel.org
Subject: Re: Linux 5.2-RC regression bisected, mounting glusterfs volumes
 fails after commit: fuse: require /dev/fuse reads to have enough buffer capacity

On Tue, Jun 11, 2019 at 1:03 PM Sander Eikelenboom <linux@...elenboom.it> wrote:
>
> L.S.,
>
> While testing a linux 5.2 kernel I noticed it fails to mount my glusterfs volumes.
>
> It repeatedly fails with:
>    [2019-06-11 09:15:27.106946] W [fuse-bridge.c:4993:fuse_thread_proc] 0-glusterfs-fuse: read from /dev/fuse returned -1 (Invalid argument)
>    [2019-06-11 09:15:27.106955] W [fuse-bridge.c:4993:fuse_thread_proc] 0-glusterfs-fuse: read from /dev/fuse returned -1 (Invalid argument)
>    [2019-06-11 09:15:27.106963] W [fuse-bridge.c:4993:fuse_thread_proc] 0-glusterfs-fuse: read from /dev/fuse returned -1 (Invalid argument)
>    [2019-06-11 09:15:27.106971] W [fuse-bridge.c:4993:fuse_thread_proc] 0-glusterfs-fuse: read from /dev/fuse returned -1 (Invalid argument)
>    etc.
>    etc.
>
> Bisecting turned up as culprit:
>     commit d4b13963f217dd947da5c0cabd1569e914d21699: fuse: require /dev/fuse reads to have enough buffer capacity
>
> The glusterfs version i'm using is from Debian stable:
>     ii  glusterfs-client                3.8.8-1                      amd64        clustered file-system (client package)
>     ii  glusterfs-common                3.8.8-1                      amd64        GlusterFS common libraries and translator modules
>
>
> A 5.1.* kernel works fine, as does a 5.2-rc4 kernel with said commit reverted.

Thanks for the report, reverted the bad commit.

Thanks,
Miklos