| Message ID | 20210223115048.435-3-xieyongji@bytedance.com |
|---|---|
| State | New |
| Headers | show |
| Series | Introduce VDUSE - vDPA Device in Userspace | expand |
On 2021/2/23 7:50 下午, Xie Yongji wrote: > Use vhost_dev->mutex to protect vhost device iotlb from > concurrent access. > > Fixes: 4c8cf318("vhost: introduce vDPA-based backend") > Signed-off-by: Xie Yongji <xieyongji@bytedance.com> > --- > drivers/vhost/vdpa.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > index c50079dfb281..5500e3bf05c1 100644 > --- a/drivers/vhost/vdpa.c > +++ b/drivers/vhost/vdpa.c > @@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, > if (r) > return r; > > + mutex_lock(&dev->mutex); I think this should be done before the vhost_dev_check_owner() above. Thanks > switch (msg->type) { > case VHOST_IOTLB_UPDATE: > r = vhost_vdpa_process_iotlb_update(v, msg); > @@ -742,6 +743,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, > r = -EINVAL; > break; > } > + mutex_unlock(&dev->mutex); > > return r; > }
On Tue, Mar 2, 2021 at 2:47 PM Jason Wang <jasowang@redhat.com> wrote: > > > On 2021/2/23 7:50 下午, Xie Yongji wrote: > > Use vhost_dev->mutex to protect vhost device iotlb from > > concurrent access. > > > > Fixes: 4c8cf318("vhost: introduce vDPA-based backend") > > Signed-off-by: Xie Yongji <xieyongji@bytedance.com> > > --- > > drivers/vhost/vdpa.c | 2 ++ > > 1 file changed, 2 insertions(+) > > > > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c > > index c50079dfb281..5500e3bf05c1 100644 > > --- a/drivers/vhost/vdpa.c > > +++ b/drivers/vhost/vdpa.c > > @@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, > > if (r) > > return r; > > > > + mutex_lock(&dev->mutex); > > > I think this should be done before the vhost_dev_check_owner() above. > Agree. Will do it in v5. Thanks, Yongji
diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c index c50079dfb281..5500e3bf05c1 100644 --- a/drivers/vhost/vdpa.c +++ b/drivers/vhost/vdpa.c @@ -723,6 +723,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, if (r) return r; + mutex_lock(&dev->mutex); switch (msg->type) { case VHOST_IOTLB_UPDATE: r = vhost_vdpa_process_iotlb_update(v, msg); @@ -742,6 +743,7 @@ static int vhost_vdpa_process_iotlb_msg(struct vhost_dev *dev, r = -EINVAL; break; } + mutex_unlock(&dev->mutex); return r; }
Use vhost_dev->mutex to protect vhost device iotlb from concurrent access. Fixes: 4c8cf318("vhost: introduce vDPA-based backend") Signed-off-by: Xie Yongji <xieyongji@bytedance.com> --- drivers/vhost/vdpa.c | 2 ++ 1 file changed, 2 insertions(+)