X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=drivers%2Fnet%2Fvirtio%2Fvirtio_user%2Fvhost_kernel_tap.c;h=acddefa33d8242af916c2784cf589e01be926ff8;hb=7784e977bc85ded8dff2ca9a76d8f0b1eb984a3f;hp=9ea7ade742756f9da9127d21ba0714b3ba49dcb1;hpb=791b43e08842c95a7f4f879c32cc5225014f7ef5;p=dpdk.git

diff --git a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
index 9ea7ade742..acddefa33d 100644
--- a/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
+++ b/drivers/net/virtio/virtio_user/vhost_kernel_tap.c
@@ -16,21 +16,65 @@
 
 #include "vhost_kernel_tap.h"
 #include "../virtio_logs.h"
+#include "../virtio_pci.h"
+
+int
+vhost_kernel_tap_set_offload(int fd, uint64_t features)
+{
+	unsigned int offload = 0;
+
+	if (features & (1ULL << VIRTIO_NET_F_GUEST_CSUM)) {
+		offload |= TUN_F_CSUM;
+		if (features & (1ULL << VIRTIO_NET_F_GUEST_TSO4))
+			offload |= TUN_F_TSO4;
+		if (features & (1ULL << VIRTIO_NET_F_GUEST_TSO6))
+			offload |= TUN_F_TSO6;
+		if (features & ((1ULL << VIRTIO_NET_F_GUEST_TSO4) |
+			(1ULL << VIRTIO_NET_F_GUEST_TSO6)) &&
+			(features & (1ULL << VIRTIO_NET_F_GUEST_ECN)))
+			offload |= TUN_F_TSO_ECN;
+		if (features & (1ULL << VIRTIO_NET_F_GUEST_UFO))
+			offload |= TUN_F_UFO;
+	}
+
+	/* Check if our kernel supports TUNSETOFFLOAD */
+	if (ioctl(fd, TUNSETOFFLOAD, 0) != 0 && errno == EINVAL) {
+		PMD_DRV_LOG(ERR, "Kernel does't support TUNSETOFFLOAD\n");
+		return -ENOTSUP;
+	}
+
+	if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+		offload &= ~TUN_F_UFO;
+		if (ioctl(fd, TUNSETOFFLOAD, offload) != 0) {
+			PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s\n",
+				strerror(errno));
+			return -1;
+		}
+	}
+
+	return 0;
+}
+
+int
+vhost_kernel_tap_set_queue(int fd, bool attach)
+{
+	struct ifreq ifr = {
+		.ifr_flags = attach ? IFF_ATTACH_QUEUE : IFF_DETACH_QUEUE,
+	};
+
+	return ioctl(fd, TUNSETQUEUE, &ifr);
+}
 
 int
 vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
-			 const char *mac)
+			 const char *mac, uint64_t features)
 {
 	unsigned int tap_features;
+	char *tap_name = NULL;
 	int sndbuf = INT_MAX;
 	struct ifreq ifr;
 	int tapfd;
-	unsigned int offload =
-			TUN_F_CSUM |
-			TUN_F_TSO4 |
-			TUN_F_TSO6 |
-			TUN_F_TSO_ECN |
-			TUN_F_UFO;
+	int ret;
 
 	/* TODO:
 	 * 1. verify we can get/set vnet_hdr_len, tap_probe_vnet_hdr_len
@@ -78,7 +122,16 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
 		goto error;
 	}
 
-	fcntl(tapfd, F_SETFL, O_NONBLOCK);
+	tap_name = strdup(ifr.ifr_name);
+	if (!tap_name) {
+		PMD_DRV_LOG(ERR, "strdup ifname failed: %s", strerror(errno));
+		goto error;
+	}
+
+	if (fcntl(tapfd, F_SETFL, O_NONBLOCK) < 0) {
+		PMD_DRV_LOG(ERR, "fcntl tapfd failed: %s", strerror(errno));
+		goto error;
+	}
 
 	if (ioctl(tapfd, TUNSETVNETHDRSZ, &hdr_size) < 0) {
 		PMD_DRV_LOG(ERR, "TUNSETVNETHDRSZ failed: %s", strerror(errno));
@@ -90,27 +143,24 @@ vhost_kernel_open_tap(char **p_ifname, int hdr_size, int req_mq,
 		goto error;
 	}
 
-	/* TODO: before set the offload capabilities, we'd better (1) check
-	 * negotiated features to see if necessary to offload; (2) query tap
-	 * to see if it supports the offload capabilities.
-	 */
-	if (ioctl(tapfd, TUNSETOFFLOAD, offload) != 0)
-		PMD_DRV_LOG(ERR, "TUNSETOFFLOAD ioctl() failed: %s",
-			   strerror(errno));
+	ret = vhost_kernel_tap_set_offload(tapfd, features);
+	if (ret < 0 && ret != -ENOTSUP)
+		goto error;
 
 	memset(&ifr, 0, sizeof(ifr));
 	ifr.ifr_hwaddr.sa_family = ARPHRD_ETHER;
-	memcpy(ifr.ifr_hwaddr.sa_data, mac, ETHER_ADDR_LEN);
+	memcpy(ifr.ifr_hwaddr.sa_data, mac, RTE_ETHER_ADDR_LEN);
 	if (ioctl(tapfd, SIOCSIFHWADDR, (void *)&ifr) == -1) {
 		PMD_DRV_LOG(ERR, "SIOCSIFHWADDR failed: %s", strerror(errno));
 		goto error;
 	}
 
-	if (!(*p_ifname))
-		*p_ifname = strdup(ifr.ifr_name);
+	free(*p_ifname);
+	*p_ifname = tap_name;
 
 	return tapfd;
 error:
+	free(tap_name);
 	close(tapfd);
 	return -1;
 }