Turn on scatter-gather and checksum offload

Checksum offload was turned off in QubesOS/qubes-issues#700 due to a bug
that is unlikely to still be relevant.  Scatter-gather was turned off
for unclear reasons that are also unlikely to be relevant nowadays.
This should significantly improve networking performance.

Fixes QubesOS/qubes-issues#3510.

archlinux/PKGBUILD

@@ -35,7 +35,6 @@ build() {
     done
 
     # Fix for network tools paths
-    sed 's:/sbin/ethtool:ethtool:g' -i network/*
     sed 's:/sbin/ip:ip:g' -i network/*
     sed 's:/bin/grep:grep:g' -i network/*
 
@@ -61,7 +60,7 @@ package_qubes-vm-core() {
     release=${BASH_REMATCH[1]}.${BASH_REMATCH[2]}
     # temporarily pretend it is still R4.1, until repository for R4.2 is created
     release=4.1
-    depends=(qubes-vm-utils python python-xdg ethtool ntp iproute2
+    depends=(qubes-vm-utils python python-xdg ntp iproute2
              gnome-packagekit imagemagick fakeroot notification-daemon dconf
              zenity qubes-libvchan qubes-db-vm haveged python-gobject
              python-dbus xdg-utils notification-daemon gawk sed procps-ng librsvg
@@ -119,7 +118,7 @@ EOF
 #
 package_qubes-vm-networking() {
     pkgdesc="Qubes OS tools allowing to use a Qubes VM as a NetVM/ProxyVM"
-    depends=(qubes-vm-core qubes-vm-utils python ethtool iproute2
+    depends=(qubes-vm-core qubes-vm-utils python iproute2
              qubes-db-vm networkmanager iptables tinyproxy nftables
              conntrack-tools
              )

debian/control

@@ -126,7 +126,6 @@ Depends:
     qubes-core-agent (= ${binary:Version}),
     tinyproxy,
     iptables,
-    ethtool,
     conntrack,
     socat,
     tinyproxy,

network/setup-ip

@@ -214,9 +214,6 @@ if [ "$ACTION" == "add" ]; then
         secondary_dns=$(/usr/bin/qubesdb-read /qubes-secondary-dns 2>/dev/null) || secondary_dns=
 
         if [ -n "$ip" ]; then
-            /sbin/ethtool -K "$INTERFACE" sg off
-            /sbin/ethtool -K "$INTERFACE" tx off
-
             # If NetworkManager is enabled, let it configure the network
             if qsvc network-manager && [ -e /usr/bin/nmcli ]; then
                 configure_network_nm "$MAC" "$INTERFACE" "$ip" "$ip6" "$netmask" "$netmask6" "$gateway" "$gateway6" "$primary_dns" "$secondary_dns"

rpm_spec/core-agent.spec.in

@@ -239,7 +239,6 @@ Scripts required to handle dom0 updates.
 
 %package networking
 Summary:    Networking support for Qubes VM
-Requires:   ethtool
 Requires:   iptables
 Requires:   conntrack-tools
 Requires:   iproute

vm-init.d/qubes-firewall

@@ -19,7 +19,6 @@ start()
 
     if qsvc qubes-firewall ; then
         echo -n $"Starting Qubes Firewall monitor:"
-        /sbin/ethtool -K "$(get_qubes_managed_iface)" sg off
         /usr/bin/qubes-firewall &
         success
         echo ""

vm-systemd/network-proxy-setup.sh

@@ -28,5 +28,4 @@ if [ "x$network" != "x" ]; then
     if [ -n "$gateway6" ]; then
         echo 1 > /proc/sys/net/ipv6/conf/all/forwarding
     fi
-    /sbin/ethtool -K "$(get_qubes_managed_iface)" sg off || true
 fi