Re: [RFC PATCH v6 16/22] vhost/vsock: SEQPACKET feature bit support

Stefano Garzarella
2021-03-15T11:28:42Z

On Sun, Mar 07, 2021 at 09:03:41PM +0300, Arseny Krasnov wrote:
>This adds handling of SEQPACKET bit: if guest sets features with
>this bit cleared, then SOCK_SEQPACKET support will be disabled.
>
>Signed-off-by: Arseny Krasnov <arseny.krasnov@kaspersky.com>
>---
> drivers/vhost/vsock.c | 6 +++++-
> 1 file changed, 5 insertions(+), 1 deletion(-)

I think is better to move this patch after we set the seqpackets ops,
so we are really able to handle SEQPACKET traffic.

>
>diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c
>index 5e78fb719602..3b0a50e6de12 100644
>--- a/drivers/vhost/vsock.c
>+++ b/drivers/vhost/vsock.c
>@@ -31,7 +31,8 @@
>
> enum {
> VHOST_VSOCK_FEATURES = VHOST_FEATURES |
>- (1ULL << VIRTIO_F_ACCESS_PLATFORM)
>+ (1ULL << VIRTIO_F_ACCESS_PLATFORM) |
>+ (1ULL << VIRTIO_VSOCK_F_SEQPACKET)
> };
>
> enum {
>@@ -785,6 +786,9 @@ static int vhost_vsock_set_features(struct vhost_vsock *vsock, u64 features)
> goto err;
> }
>
>+ if (features & (1ULL << VIRTIO_VSOCK_F_SEQPACKET))
>+ vhost_transport.seqpacket_allow = true;
>+
> for (i = 0; i < ARRAY_SIZE(vsock->vqs); i++) {
> vq = &vsock->vqs[i];
> mutex_lock(&vq->mutex);
>--
>2.25.1