network: add rd.route parameter

dracut.cmdline.7.asc

@@ -493,6 +493,19 @@ WARNING: Do **not** use the default kernel naming scheme for the interface name,
 as it can conflict with the kernel names. So, don't use "eth[0-9]+" for the
 interface name. Better name it "bootnet" or "bluesocket".
 
+**rd.route=**__<net>__/__<netmask>__:__<gateway>__[:__<interface>__]::
+    Add a static route with route options, which are separated by a colon.
+    IPv6 addresses have to be put in brackets.
++
+[listing]
+.Example
+--
+    rd.route=192.168.200.0/24:192.168.100.222:ens10
+    rd.route=192.168.200.0/24:192.168.100.222
+    rd.route=192.168.200.0/24::ens10
+    rd.route=[2001:DB8:3::/8]:[2001:DB8:2::1]:ens10
+--
+
 **bootdev=**__<interface>__::
     specify network interface to use routing and netroot information from.
     Required if multiple ip= lines are used.
@@ -540,7 +553,7 @@ NFS
 ~~~
 **root=**\[_<server-ip>_:]__<root-dir>__[:__<nfs-options>__]::
     mount nfs share from <server-ip>:/<root-dir>, if no server-ip is given, use
-    dhcp next_server. if server-ip is an IPv6 address it has to be put in
+    dhcp next_server. If server-ip is an IPv6 address it has to be put in
     brackets, e.g. [2001:DB8::1]. NFS options can be appended with the prefix
     ":" or "," and are seperated by ",".
 

modules.d/40network/net-lib.sh

@@ -89,6 +89,7 @@ ifdown() {
 
 setup_net() {
     local netif="$1" f="" gw_ip="" netroot_ip="" iface="" IFACES=""
+    local _p
     [ -e /tmp/net.$netif.did-setup ] && return
     [ -e /sys/class/net/$netif/address ] && \
         [ -e /tmp/net.$(cat /sys/class/net/$netif/address).did-setup ] && return
@@ -103,6 +104,20 @@ setup_net() {
     [ -e /tmp/net.$netif.resolv.conf ] && \
         cp -f /tmp/net.$netif.resolv.conf /etc/resolv.conf
 
+    # add static route
+    for _p in $(getargs rd.route); do
+        route_to_var "$_p" || continue
+        [ -n "$route_dev" ] && [ "$route_dev" != "$netif"] && continue
+        ip route add "$route_mask" ${route_gw:+via "$route_gw"} ${route_dev:+dev "$route_dev"}
+        if strstr ":" "$route_mask"; then
+            printf -- "%s\n" "$route_mask ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev}" \
+                > /tmp/net.route6."$netif"
+        else
+            printf -- "%s\n" "$route_mask ${route_gw:+via $route_gw} ${route_dev:+dev $route_dev}" \
+                > /tmp/net.route."$netif"
+        fi
+    done
+
     # Handle STP Timeout: arping the default gateway.
     # (or the root server, if a) it's local or b) there's no gateway.)
     # Note: This assumes that if no router is present the
@@ -400,6 +415,33 @@ ip_to_var() {
     fi
 }
 
+route_to_var() {
+    local v=${1}:
+    local i
+    set --
+    while [ -n "$v" ]; do
+        if [ "${v#\[*:*:*\]:}" != "$v" ]; then
+            # handle IPv6 address
+            i="${v%%\]:*}"
+            i="${i##\[}"
+            set -- "$@" "$i"
+            v=${v#\[$i\]:}
+        else
+            set -- "$@" "${v%%:*}"
+            v=${v#*:}
+        fi
+    done
+
+    unset route_mask route_gw route_dev
+    case $# in
+        2)  [ -n "$1" ] && route_mask="$1"; [ -n "$2" ] && route_gw="$2"
+            return 0;;
+        3)  [ -n "$1" ] && route_mask="$1"; [ -n "$2" ] && route_gw="$2"; [ -n "$3" ] && route_dev="$3"
+            return 0;;
+        *)  return 1;;
+    esac
+}
+
 parse_ifname_opts() {
     local IFS=:
     set $1

modules.d/45ifcfg/write-ifcfg.sh

@@ -268,6 +268,9 @@ for netup in /tmp/net.*.did-setup ; do
         echo "DNS${i}=\"${ns}\"" >> /tmp/ifcfg/ifcfg-$netif
         i=$((i+1))
     done
+
+    [ -f /tmp/net.route6."$netif" ] && cp /tmp/net.route6."$netif" /tmp/ifcfg/route6-"$netif"
+    [ -f /tmp/net.route."$netif" ] && cp /tmp/net.route."$netif" /tmp/ifcfg/route-"$netif"
 done
 
 # Pass network opts