diff options
Diffstat (limited to 'drivers/vhost/vsock.c')
| -rw-r--r-- | drivers/vhost/vsock.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/vhost/vsock.c b/drivers/vhost/vsock.c index 817d377a3f36..f75731396b7e 100644 --- a/drivers/vhost/vsock.c +++ b/drivers/vhost/vsock.c @@ -114,6 +114,7 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, struct sk_buff *skb; unsigned out, in; size_t nbytes; + u32 offset; int head; skb = virtio_vsock_skb_dequeue(&vsock->send_pkt_queue); @@ -156,7 +157,8 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, } iov_iter_init(&iov_iter, ITER_DEST, &vq->iov[out], in, iov_len); - payload_len = skb->len; + offset = VIRTIO_VSOCK_SKB_CB(skb)->offset; + payload_len = skb->len - offset; hdr = virtio_vsock_hdr(skb); /* If the packet is greater than the space available in the @@ -197,8 +199,10 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, break; } - nbytes = copy_to_iter(skb->data, payload_len, &iov_iter); - if (nbytes != payload_len) { + if (skb_copy_datagram_iter(skb, + offset, + &iov_iter, + payload_len)) { kfree_skb(skb); vq_err(vq, "Faulted on copying pkt buf\n"); break; @@ -212,13 +216,13 @@ vhost_transport_do_send_pkt(struct vhost_vsock *vsock, vhost_add_used(vq, head, sizeof(*hdr) + payload_len); added = true; - skb_pull(skb, payload_len); + VIRTIO_VSOCK_SKB_CB(skb)->offset += payload_len; total_len += payload_len; /* If we didn't send all the payload we can requeue the packet * to send it with the next available buffer. */ - if (skb->len > 0) { + if (VIRTIO_VSOCK_SKB_CB(skb)->offset < skb->len) { hdr->flags |= cpu_to_le32(flags_to_restore); /* We are queueing the same skb to handle @@ -394,6 +398,11 @@ static bool vhost_vsock_more_replies(struct vhost_vsock *vsock) return val < vq->num; } +static bool vhost_transport_msgzerocopy_allow(void) +{ + return true; +} + static bool vhost_transport_seqpacket_allow(u32 remote_cid); static struct virtio_transport vhost_transport = { @@ -427,6 +436,8 @@ static struct virtio_transport vhost_transport = { .seqpacket_allow = vhost_transport_seqpacket_allow, .seqpacket_has_data = virtio_transport_seqpacket_has_data, + .msgzerocopy_allow = vhost_transport_msgzerocopy_allow, + .notify_poll_in = virtio_transport_notify_poll_in, .notify_poll_out = virtio_transport_notify_poll_out, .notify_recv_init = virtio_transport_notify_recv_init, |