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module-setup: Use proper ethernet device name in 2nd kernel 

For ethX, it may fail to setup the network in the 2nd kernel due to the
mapping of ethernet device name and MAC changes.

The commit(ba7660f37e) has fixed this
issue by add the prefix "kdump-" before ethX. But the network will fail
to work in the static route mode because of this commit.

Here is the config which is used to setup the static route:
rd.route=192.168.201.215:192.168.200.137:eth1

Obviously, the static route config comtains the ethX. But the network
device names kdump-ethX in the 2nd kernel, so the static route config
will fail to execute. To fix it, we should identify the network device.

Add the prefix "kdump-" before the ethX in the static route config to
setup it successfully in the 2nd kernel.

Signed-off-by: Minfei Huang <mhuang@redhat.com>
Acked-by: WANG Chao <chaowang@redhat.com>
Acked-by: Baoquan He <bhe@redhat.com>
This commit is contained in:
Minfei Huang 2014-12-05 14:46:15 +08:00 committed by WANG Chao
parent d94c354e81
commit 08809fb0c7
1 changed files with 14 additions and 9 deletions
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23
dracut-module-setup.sh
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@ -209,20 +209,25 @@ kdump_setup_znet() {
get_routes() {
local _netdev="$1" _target="$2"
local _route
local _route _nexthop
_route=`/sbin/ip route get to $_target 2>&1`
if /sbin/ip route get to $_target | grep -q "via";
then
#
# in the same subnet region, following is the route format
# _route='192.168.200.137 dev eth1 src 192.168.200.129
# cache '
#
# in the different subnet region, following is the route format
# _route='192.168.201.215 via 192.168.200.137 dev eth1 src 192.168.200.129
# cache '
#
if `echo $_route | grep -q "via"`; then
# route going to a different subnet via a router
echo $_route | awk '{printf("rd.route=%s:%s:%s\n", $1, $3, $5)}' \
>> ${initdir}/etc/cmdline.d/45route-static.conf
else
# route going to a different subnet though directly connected
echo $_route | awk '{printf("rd.route=%s::%s\n", $1, $3)}' \
>> ${initdir}/etc/cmdline.d/45route-static.conf
_nexthop=`echo $_route | awk '{print $3}'`
fi
_netdev=$(kdump_setup_ifname $_netdev)
echo "rd.route=$_target:$_nexthop:$_netdev" >> ${initdir}/etc/cmdline.d/45route-static.conf
}
# Setup dracut to bringup a given network interface