[PATCH 1/8] kvm tools: pass virtio header size to uip_init

[Sasha Levin <sasha.levin@xxxxxxxxxx>]

We want to make the size of the virtio net header opaque to
uip.

Signed-off-by: Sasha Levin <sasha.levin@xxxxxxxxxx>
---
 tools/kvm/include/kvm/uip.h | 1 +
 tools/kvm/net/uip/core.c    | 8 ++++----
 tools/kvm/net/uip/tcp.c     | 2 +-
 tools/kvm/net/uip/udp.c     | 2 +-
 tools/kvm/virtio/net.c      | 1 +
 5 files changed, 8 insertions(+), 6 deletions(-)

diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index ac248d2..338582d 100644
--- a/tools/kvm/include/kvm/uip.h
+++ b/tools/kvm/include/kvm/uip.h
@@ -205,6 +205,7 @@ struct uip_info {
 	u32 dns_ip[UIP_DHCP_MAX_DNS_SERVER_NR];
 	char *domain_name;
 	u32 buf_nr;
+	u32 vnet_hdr_len;
 };
 
 struct uip_buf {
diff --git a/tools/kvm/net/uip/core.c b/tools/kvm/net/uip/core.c
index 4e5bb82..7a74261 100644
--- a/tools/kvm/net/uip/core.c
+++ b/tools/kvm/net/uip/core.c
@@ -172,10 +172,10 @@ int uip_init(struct uip_info *info)
 	}
 
 	list_for_each_entry(buf, buf_head, list) {
-		buf->vnet	= malloc(sizeof(struct virtio_net_hdr));
-		buf->vnet_len	= sizeof(struct virtio_net_hdr);
-		buf->eth	= malloc(1024*64 + sizeof(struct uip_pseudo_hdr));
-		buf->eth_len	= 1024*64 + sizeof(struct uip_pseudo_hdr);
+		buf->vnet_len   = info->vnet_hdr_len;
+		buf->vnet	= malloc(buf->vnet_len);
+		buf->eth_len    = 1024*64 + sizeof(struct uip_pseudo_hdr);
+		buf->eth	= malloc(buf->eth_len);
 
 		memset(buf->vnet, 0, buf->vnet_len);
 		memset(buf->eth, 0, buf->eth_len);
diff --git a/tools/kvm/net/uip/tcp.c b/tools/kvm/net/uip/tcp.c
index 9044f40..3c30ade 100644
--- a/tools/kvm/net/uip/tcp.c
+++ b/tools/kvm/net/uip/tcp.c
@@ -153,7 +153,7 @@ static int uip_tcp_payload_send(struct uip_tcp_socket *sk, u8 flag, u16 payload_
 	/*
 	 * virtio_net_hdr
 	 */
-	buf->vnet_len	= sizeof(struct virtio_net_hdr);
+	buf->vnet_len	= info->vnet_hdr_len;
 	memset(buf->vnet, 0, buf->vnet_len);
 
 	buf->eth_len	= ntohs(ip2->len) + uip_eth_hdrlen(&ip2->eth);
diff --git a/tools/kvm/net/uip/udp.c b/tools/kvm/net/uip/udp.c
index 31c417c..dd288c5 100644
--- a/tools/kvm/net/uip/udp.c
+++ b/tools/kvm/net/uip/udp.c
@@ -142,7 +142,7 @@ int uip_udp_make_pkg(struct uip_info *info, struct uip_udp_socket *sk, struct ui
 	/*
 	 * virtio_net_hdr
 	 */
-	buf->vnet_len	= sizeof(struct virtio_net_hdr);
+	buf->vnet_len	= info->vnet_hdr_len;
 	memset(buf->vnet, 0, buf->vnet_len);
 
 	buf->eth_len	= ntohs(ip2->len) + uip_eth_hdrlen(&ip2->eth);
diff --git a/tools/kvm/virtio/net.c b/tools/kvm/virtio/net.c
index c0a8f12..2de9222 100644
--- a/tools/kvm/virtio/net.c
+++ b/tools/kvm/virtio/net.c
@@ -668,6 +668,7 @@ static int virtio_net__init_one(struct virtio_net_params *params)
 		ndev->info.guest_ip		= ntohl(inet_addr(params->guest_ip));
 		ndev->info.guest_netmask	= ntohl(inet_addr("255.255.255.0"));
 		ndev->info.buf_nr		= 20,
+		ndev->info.vnet_hdr_len		= sizeof(struct virtio_net_hdr);
 		uip_init(&ndev->info);
 		ndev->ops = &uip_ops;
 	}
-- 
1.8.2.1

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