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authorSusant Sahani <ssahani@gmail.com>2015-07-14 13:55:52 +0530
committerSusant Sahani <susant@redhat.com>2015-07-14 14:10:56 +0530
commitf5f07dbf06f6df9d12e092c05ad8cfbe244d203f (patch)
treed2a371bb533afb8a057dffe09ae496ac79e417ee
parentff89f8b917a83a3fc0dc3ad0961c3bc953f78e8f (diff)
networkd: tap add support for vnet_hdr
This patch adds support to configure IFF_VNET_HDR flag for a tap device. It allows whether sending and receiving large pass larger (GSO) packets. This greatly increases the achievable throughput.
-rw-r--r--src/network/networkd-netdev-gperf.gperf1
-rw-r--r--src/network/networkd-netdev-tuntap.c3
-rw-r--r--src/network/networkd-netdev-tuntap.h1
3 files changed, 5 insertions, 0 deletions
diff --git a/src/network/networkd-netdev-gperf.gperf b/src/network/networkd-netdev-gperf.gperf
index 66ed2e013c..010c106610 100644
--- a/src/network/networkd-netdev-gperf.gperf
+++ b/src/network/networkd-netdev-gperf.gperf
@@ -59,6 +59,7 @@ Tun.Group, config_parse_string, 0,
Tap.OneQueue, config_parse_bool, 0, offsetof(TunTap, one_queue)
Tap.MultiQueue, config_parse_bool, 0, offsetof(TunTap, multi_queue)
Tap.PacketInfo, config_parse_bool, 0, offsetof(TunTap, packet_info)
+Tap.VnetHeader, config_parse_bool, 0, offsetof(TunTap, vnet_hdr)
Tap.User, config_parse_string, 0, offsetof(TunTap, user_name)
Tap.Group, config_parse_string, 0, offsetof(TunTap, group_name)
Bond.Mode, config_parse_bond_mode, 0, offsetof(Bond, mode)
diff --git a/src/network/networkd-netdev-tuntap.c b/src/network/networkd-netdev-tuntap.c
index 378312f091..ba84e802fc 100644
--- a/src/network/networkd-netdev-tuntap.c
+++ b/src/network/networkd-netdev-tuntap.c
@@ -51,6 +51,9 @@ static int netdev_fill_tuntap_message(NetDev *netdev, struct ifreq *ifr) {
if (t->multi_queue)
ifr->ifr_flags |= IFF_MULTI_QUEUE;
+ if (t->vnet_hdr)
+ ifr->ifr_flags |= IFF_VNET_HDR;
+
strncpy(ifr->ifr_name, netdev->ifname, IFNAMSIZ-1);
return 0;
diff --git a/src/network/networkd-netdev-tuntap.h b/src/network/networkd-netdev-tuntap.h
index b804875bbb..29f8bb0ea5 100644
--- a/src/network/networkd-netdev-tuntap.h
+++ b/src/network/networkd-netdev-tuntap.h
@@ -33,6 +33,7 @@ struct TunTap {
bool one_queue;
bool multi_queue;
bool packet_info;
+ bool vnet_hdr;
};
extern const NetDevVTable tun_vtable;