From 0d52009f7ea77e739fca105988c01337dfeb04d5 Mon Sep 17 00:00:00 2001
From: Alexander Sulfrian <alexander@sulfrian.net>
Date: Sat, 28 Sep 2013 18:33:26 +0200
Subject: initial commit

---
 vserver.netns | 141 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 141 insertions(+)
 create mode 100755 vserver.netns

(limited to 'vserver.netns')

diff --git a/vserver.netns b/vserver.netns
new file mode 100755
index 0000000..a3e81eb
--- /dev/null
+++ b/vserver.netns
@@ -0,0 +1,141 @@
+#!/bin/bash
+
+: ${UTIL_VSERVER_VARS:=/usr/lib/util-vserver/util-vserver-vars.netns}
+test -e "$UTIL_VSERVER_VARS" || {
+    echo $"Can not find util-vserver installation (the file '$UTIL_VSERVER_VARS' would be expected); aborting..." >&2
+    exit 1
+}
+. "$UTIL_VSERVER_VARS"
+. "$_LIB_FUNCTIONS"
+. $__PKGLIBDIR/vserver.functions
+
+function _processSingleNetwork() {
+    local dev
+    local iface
+    local vlan
+    local mac
+
+    getFileValue dev "${2}/dev" "${2}/../dev"
+    [ -n "$dev" ] || return 1
+
+    iface="$(netnsCreateIfaceName "$2")"
+    getFileValue vlan "${2}/vlan"
+
+    case "$1" in
+        add)
+            if [ ! -e "${2}/nocleanup" ]; then
+                $_IP link show dev "$iface" >/dev/null 2>&1 && $_IP link del "$iface"
+                $_IP netns exec "$VSERVER_NAME" $_IP link show dev "$iface" >/dev/null 2>&1 && $_IP netns exec "$VSERVER_NAME" $_IP link del "$iface"
+            fi
+
+            if [ -z "$vlan" ]; then
+                $_IP link add link "$dev" name "$iface" type macvlan mode bridge
+            else
+                $_IP link add link "$dev" name "$iface" type vlan id "$vlan"
+            fi
+
+            getFileValue mac "${2}/mac"
+            [ -n "$mav" ] || mac="$(netnsCreateMac "$2")"
+
+            $_IP link set dev "$iface" netns "$VSERVER_NAME"
+            $_IP netns exec "$VSERVER_NAME" $_IP link set dev "$iface" address "$mac"
+            $_IP netns exec "$VSERVER_NAME" $_VPROCUNHIDE
+            ;;
+
+        remove)
+            $_IP netns exec "$VSERVER_NAME" $_IP link del "$iface"
+            ;;
+    esac
+}
+
+# preserve args
+ARGS=( "$@" )
+SELF=( "$0" )
+
+# skip arguments starting with -
+while :
+do
+    case "$1" in
+        --)
+            SELF=( "${SELF[@]}" "$1" )
+            shift
+            break
+            ;;
+        -*)
+            SELF=( "${SELF[@]}" "$1" )
+            shift
+            ;;
+        *)
+            break
+            ;;
+    esac
+done
+
+VSERVER_NAME="$1"
+ACTION="$2"
+NETNS=()
+
+_setVserverDir "$VSERVER_NAME"
+
+[ -d "${VSERVER_DIR}/netns/" ] && _USE_NETNS="1"
+
+if [[ "$ACTION" == "start" && -n "${_USE_NETNS}" ]]; then
+    pushd "$VSERVER_DIR" >/dev/null
+    execScriptlets   "$VSERVER_DIR" "$VSERVER_NAME" pre-netns
+    popd >/dev/null
+
+    # create and init netns
+    $_IP netns list | grep -q "^${VSERVER_NAME}\$" || $_IP netns add "$VSERVER_NAME"
+    $_IP netns exec "$VSERVER_NAME" $_IP link set dev lo up
+
+    for net in "$VSERVER_DIR/netns/"*; do
+        test   -d "$net"            || continue
+        test ! -e "${net}/disabled" || continue
+
+        _processSingleNetwork add "$net"
+    done
+fi
+
+if [[ "$ACTION" == "start" ||
+      "$ACTION" == "stop" ||
+      "$ACTION" == "enter" ||
+      "$ACTION" == "exec" ||
+      "$ACTION" == "suexec" ]]
+then
+    if [ -n "${_USE_NETNS}" ]; then
+        # enter netns
+        NETNS=( $_IP netns exec "$VSERVER_NAME" )
+    fi
+fi
+
+if [[ "$ACTION" == "restart" ]]; then
+    "${SELF[@]}" --sync "$VSERVER_NAME" stop
+    exec "${SELF[@]}" "$VSERVER_NAME" start
+fi
+
+
+# prepare for executing real _VSERVER
+export _USE_NETNS
+export UTIL_VSERVER_VARS
+
+if [[ "$ACTION" != "stop" ]]; then
+    exec "${NETNS[@]}" "$_REAL_VSERVER" "${ARGS[@]}"
+fi
+
+
+# stop need to do something after the stop, so no exec here
+"${NETNS[@]}" "$_REAL_VSERVER" "${ARGS[@]}"
+ret=$?
+
+if [ -n "${_USE_NETNS}" ]; then
+    for net in "${VSERVER_DIR}/netns/"*; do
+        test   -d "$net"            || continue
+        test ! -e "${net}/disabled" || continue
+
+        _processSingleNetwork remove "$net"
+    done
+
+    $_IP netns delete "$VSERVER_NAME"
+fi
+
+exit $ret
-- 
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