| Message ID | 20210618133526.300347-4-sgarzare@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | vsock: small fixes for seqpacket support | expand |
On 18.06.2021 16:35, Stefano Garzarella wrote: > When memcpy_to_msg() fails in virtio_transport_seqpacket_do_dequeue(), > we already set `dequeued_len` with the negative error value returned > by memcpy_to_msg(). > > So we can directly check `dequeued_len` value instead of using a > dedicated flag variable to skip the copy path for the rest of > fragments. > > Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> > --- > net/vmw_vsock/virtio_transport_common.c | 7 ++----- > 1 file changed, 2 insertions(+), 5 deletions(-) > > diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c > index 23704a6bc437..f014ccfdd9c2 100644 > --- a/net/vmw_vsock/virtio_transport_common.c > +++ b/net/vmw_vsock/virtio_transport_common.c > @@ -413,7 +413,6 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, > struct virtio_vsock_pkt *pkt; > int dequeued_len = 0; > size_t user_buf_len = msg_data_left(msg); > - bool copy_failed = false; > bool msg_ready = false; > > spin_lock_bh(&vvs->rx_lock); > @@ -426,7 +425,7 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, > while (!msg_ready) { > pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); > > - if (!copy_failed) { > + if (dequeued_len >= 0) { > size_t pkt_len; > size_t bytes_to_copy; > > @@ -443,11 +442,9 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, > > err = memcpy_to_msg(msg, pkt->buf, bytes_to_copy); > if (err) { > - /* Copy of message failed, set flag to skip > - * copy path for rest of fragments. Rest of > + /* Copy of message failed. Rest of > * fragments will be freed without copy. > */ > - copy_failed = true; > dequeued_len = err; > } else { > user_buf_len -= bytes_to_copy; LGTM
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c index 23704a6bc437..f014ccfdd9c2 100644 --- a/net/vmw_vsock/virtio_transport_common.c +++ b/net/vmw_vsock/virtio_transport_common.c @@ -413,7 +413,6 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, struct virtio_vsock_pkt *pkt; int dequeued_len = 0; size_t user_buf_len = msg_data_left(msg); - bool copy_failed = false; bool msg_ready = false; spin_lock_bh(&vvs->rx_lock); @@ -426,7 +425,7 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, while (!msg_ready) { pkt = list_first_entry(&vvs->rx_queue, struct virtio_vsock_pkt, list); - if (!copy_failed) { + if (dequeued_len >= 0) { size_t pkt_len; size_t bytes_to_copy; @@ -443,11 +442,9 @@ static int virtio_transport_seqpacket_do_dequeue(struct vsock_sock *vsk, err = memcpy_to_msg(msg, pkt->buf, bytes_to_copy); if (err) { - /* Copy of message failed, set flag to skip - * copy path for rest of fragments. Rest of + /* Copy of message failed. Rest of * fragments will be freed without copy. */ - copy_failed = true; dequeued_len = err; } else { user_buf_len -= bytes_to_copy;
When memcpy_to_msg() fails in virtio_transport_seqpacket_do_dequeue(), we already set `dequeued_len` with the negative error value returned by memcpy_to_msg(). So we can directly check `dequeued_len` value instead of using a dedicated flag variable to skip the copy path for the rest of fragments. Signed-off-by: Stefano Garzarella <sgarzare@redhat.com> --- net/vmw_vsock/virtio_transport_common.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-)