name : net-interface-handler #!/bin/sh -e # suppress configuration of network interface used # by iSCSI root device # # If the root filesystem is on iSCSI, then we must take care to avoid # changing the state of its network interface. To this end, the initramfs # leaves a note for us which interface was used, and we mangle # /run/network/ifstate manually to stop it being brought up or down # automatically. This is a slight layering violation, but, unfortunately, # ifupdown appears to have no way to do this without also running # /etc/network/*.d/ scripts. assert_interface() { # udev sets INTERFACE to the name of the currently-processed nic. [ -n "$INTERFACE" ] && return 0 echo "environment variable INTERFACE not set." 1>&2; return 1 } start() { CR=" " assert_interface || return ifile=/run/initramfs/open-iscsi.interface [ -f "$ifile" ] && read iface < "$ifile" || return 0 [ "$INTERFACE" = "$iface" ] || return if ! grep -qs "^$iface=" /run/network/ifstate; then mkdir -p /run/network echo "$iface=$iface" >>/run/network/ifstate if [ -f /run/net-$iface.conf ]; then conf=/run/net-$iface.conf elif [ -f /run/net6-$iface.conf ]; then conf=/run/net6-$iface.conf else conf="" fi if command -v resolvconf >/dev/null && [ -n "$conf" ]; then . "$conf" R="" [ -n "$DOMAINSEARCH" ] && R="$R${CR}search $DOMAINSEARCH" [ -n "$IPV6DOMAINSEARCH" ] && R="$R${CR}search $IPV6DOMAINSEARCH" for ns in "$IPV4DNS0" "$IPV4DNS1" "$IPV6DNS0" "$IPV6DNS1"; do [ -n "$ns" -a "$ns" != "0.0.0.0" ] && R="$R${CR}nameserver $ns" done if [ -n "$R" ]; then # create the dir in case resolvconf did not start yet mkdir -p /run/resolvconf/interface resolvconf -a $iface.iscsi-network <<EOF ${R#${CR}} EOF fi fi fi } stop() { assert_interface || return ifile=/run/initramfs/open-iscsi.interface [ -f "$ifile" ] && read iface < "$ifile" || return 0 [ "$INTERFACE" = "$iface" ] || return if grep -qs "^$iface=" /run/network/ifstate; then grep -v "^$iface=" /run/network/ifstate >/run/network/.ifstate.tmp || true mv /run/network/.ifstate.tmp /run/network/ifstate if command -v resolvconf >/dev/null; then resolvconf -d $iface.iscsi-network fi fi } case "$1" in start) start ;; stop) stop ;; *) echo "ERROR: must be called with 'start' or 'stop'" >&2; exit 1 ;; esac