[PATCH 16/18] virtiofs: Use virtio_fs_mutex for races w.r.t ->remove and mount path

Stefan Hajnoczi
2019-09-06T12:05:34Z

On Thu, Sep 05, 2019 at 03:48:57PM -0400, Vivek Goyal
wrote:
> It is possible that a mount is in progress and device is being removed at
> the same time. Use virtio_fs_mutex to avoid races.
>
> This also takes care of bunch of races and removes some TODO items.
>
> Signed-off-by: Vivek Goyal <vgoyal at redhat.com>
> ---
>  fs/fuse/virtio_fs.c | 32 ++++++++++++++++++++++----------
>  1 file changed, 22 insertions(+), 10 deletions(-)

Let's move to a per-device mutex in the future.  That way a single
device that fails to drain/complete requests will not hang all other
virtio-fs instances.  This is fine for now.

Reviewed-by: Stefan Hajnoczi <stefanha at redhat.com>
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