diff options
Diffstat (limited to 'package/ifupdown-scripts/nfs_check')
| -rwxr-xr-x | package/ifupdown-scripts/nfs_check | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/package/ifupdown-scripts/nfs_check b/package/ifupdown-scripts/nfs_check new file mode 100755 index 0000000000..dfa0cbf580 --- /dev/null +++ b/package/ifupdown-scripts/nfs_check @@ -0,0 +1,20 @@ +#!/bin/sh + +# This allows NFS booting to work while also being able to configure +# the network interface via DHCP when not NFS booting. Otherwise, a +# NFS booted system will likely hang during DHCP configuration. + +# Attempting to configure the network interface used for NFS will +# initially bring that network down. Since the root filesystem is +# accessed over this network, the system hangs. + +# This script is run by ifup and will attempt to detect if a NFS root +# mount uses the interface to be configured (IFACE), and if so does +# not configure it. This should allow the same build to be disk/flash +# booted or NFS booted. + +nfsip=`sed -n '/^[^ ]*:.* \/ nfs.*[ ,]addr=\([0-9.]\+\).*/s//\1/p' /proc/mounts` +if [ -n "$nfsip" ] && ip route get to "$nfsip" | grep -q "dev $IFACE"; then + echo Skipping $IFACE, used for NFS from $nfsip + exit 1 +fi |
