From: Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
This commit implements datagram support with a new version of
->dgram_allow().
Additionally, it drops virtio_transport_dgram_allow() as an exported
symbol because it is no longer used in other transports.
Signed-off-by: Bobby Eshleman <bobby.eshleman@xxxxxxxxxxxxx>
Signed-off-by: Amery Hung <amery.hung@xxxxxxxxxxxxx>
---
include/linux/virtio_vsock.h | 1 -
net/vmw_vsock/virtio_transport.c | 22 +++++++++++++++++++++-
net/vmw_vsock/virtio_transport_common.c | 6 ------
3 files changed, 21 insertions(+), 8 deletions(-)
diff --git a/include/linux/virtio_vsock.h b/include/linux/virtio_vsock.h
index 4408749febd2..fe8fa0a9669d 100644
--- a/include/linux/virtio_vsock.h
+++ b/include/linux/virtio_vsock.h
@@ -222,7 +222,6 @@ void virtio_transport_notify_buffer_size(struct vsock_sock *vsk, u64 *val);
u64 virtio_transport_stream_rcvhiwat(struct vsock_sock *vsk);
bool virtio_transport_stream_is_active(struct vsock_sock *vsk);
bool virtio_transport_stream_allow(u32 cid, u32 port);
-bool virtio_transport_dgram_allow(u32 cid, u32 port);
int virtio_transport_connect(struct vsock_sock *vsk);
diff --git a/net/vmw_vsock/virtio_transport.c b/net/vmw_vsock/virtio_transport.c
index 4891b845fcde..4e1ed3b11e26 100644
--- a/net/vmw_vsock/virtio_transport.c
+++ b/net/vmw_vsock/virtio_transport.c
@@ -63,6 +63,7 @@ struct virtio_vsock {
u32 guest_cid;
bool seqpacket_allow;
+ bool dgram_allow;
/* These fields are used only in tx path in function
* 'virtio_transport_send_pkt_work()', so to save
@@ -492,6 +493,21 @@ static bool virtio_transport_msgzerocopy_allow(void)
return true;
}
+static bool virtio_transport_dgram_allow(u32 cid, u32 port)
+{
+ struct virtio_vsock *vsock;
+ bool dgram_allow;
+
+ dgram_allow = false;
+ rcu_read_lock();
+ vsock = rcu_dereference(the_virtio_vsock);
+ if (vsock)
+ dgram_allow = vsock->dgram_allow;
+ rcu_read_unlock();
+
+ return dgram_allow;
+}
+
static bool virtio_transport_seqpacket_allow(u32 remote_cid);
static struct virtio_transport virtio_transport = {
@@ -753,6 +769,9 @@ static int virtio_vsock_probe(struct virtio_device *vdev)
if (virtio_has_feature(vdev, VIRTIO_VSOCK_F_SEQPACKET))
vsock->seqpacket_allow = true;
+ if (virtio_has_feature(vdev, VIRTIO_VSOCK_F_DGRAM))
+ vsock->dgram_allow = true;
+
vdev->priv = vsock;
ret = virtio_vsock_vqs_init(vsock);
@@ -850,7 +869,8 @@ static struct virtio_device_id id_table[] = {
};
static unsigned int features[] = {
- VIRTIO_VSOCK_F_SEQPACKET
+ VIRTIO_VSOCK_F_SEQPACKET,
+ VIRTIO_VSOCK_F_DGRAM
};
static struct virtio_driver virtio_vsock_driver = {
diff --git a/net/vmw_vsock/virtio_transport_common.c b/net/vmw_vsock/virtio_transport_common.c
index a571b575fde9..52f671287fe3 100644
--- a/net/vmw_vsock/virtio_transport_common.c
+++ b/net/vmw_vsock/virtio_transport_common.c
@@ -1010,12 +1010,6 @@ bool virtio_transport_stream_allow(u32 cid, u32 port)
}
EXPORT_SYMBOL_GPL(virtio_transport_stream_allow);
-bool virtio_transport_dgram_allow(u32 cid, u32 port)
-{
- return false;
-}
-EXPORT_SYMBOL_GPL(virtio_transport_dgram_allow);
-
int virtio_transport_connect(struct vsock_sock *vsk)
{
struct virtio_vsock_pkt_info info = {
--
2.20.1
