From 1b3a517175f58da8dab8c4aff5f244e622957212 Mon Sep 17 00:00:00 2001 From: Keir Fraser Date: Sun, 1 Jul 2007 22:20:46 +0100 Subject: [PATCH] Make network-bridge fail on NFS or iscsi root. Since setting up bridging involves bringing down the network interface, bridging clearly isn't compatible with the likes of NFS or iSCSI root. Signed-off-by: Mark McLoughlin --- tools/examples/network-bridge | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/tools/examples/network-bridge b/tools/examples/network-bridge index a7ee9067be..6b528d8a48 100755 --- a/tools/examples/network-bridge +++ b/tools/examples/network-bridge @@ -172,11 +172,23 @@ show_status () { echo '============================================================' } +is_network_root () { + local rootfs=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $3; }}' /etc/mtab) + local rootopts=$(awk '{ if ($1 !~ /^[ \t]*#/ && $2 == "/") { print $4; }}' /etc/mtab) + + [[ "$rootfs" =~ "^nfs" ]] || [[ "$rootopts" =~ "_netdev" ]] && return 0 || return 1 +} + op_start () { if [ "${bridge}" = "null" ] ; then return fi + if is_network_root ; then + [ -x /usr/bin/logger ] && /usr/bin/logger "network-bridge: bridging not supported on network root; not starting" + return + fi + if link_exists "$pdev"; then # The device is already up. return -- 2.30.2