[PATCH] dracut-module-setup: Fix routing failure on multipath route

[Kairui Song]

Currently we still don't support multipath route, when parsing multipath
route kdumpctl will wrong consider 'nexthop' as the destination address,
and raise errors in second kernel.

When multipath route is in use, ip route output should be like this:
$ /sbin/ip route show
default via 192.168.122.1 dev ens1 proto dhcp metric 100
192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
192.168.122.8
    nexthop via 192.168.122.1 dev ens1 weight 50
    nexthop via 192.168.122.2 dev ens1 weight 5

As we won't care about HA/performance, simply use the rule with highest
weight and ignore the rest.
---
 dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
index 2f9d762..7499678 100755
--- a/dracut-module-setup.sh
+++ b/dracut-module-setup.sh
@@ -126,7 +126,8 @@ kdump_static_ip() {
         echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
     fi

-    /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
+    /sbin/ip $_ipv6_flag route show | grep -v default |\
+    grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
     while read _route; do
         _target=`echo $_route | cut -d ' ' -f1`
         _nexthop=`echo $_route | cut -d ' ' -f3`
@@ -136,6 +137,44 @@ kdump_static_ip() {
         fi
         echo "rd.route=$_target:$_nexthop:$_netdev"
     done >> ${initdir}/etc/cmdline.d/45route-static.conf
+
+    kdump_handle_mulitpath_route $_netdev $_srcaddr
+}
+
+kdump_handle_mulitpath_route() {
+    local _netdev="$1" _srcaddr="$2" _ipv6_flag
+    local _target _nexthop _route _weight _max_weight _rule
+
+    if is_ipv6_address $_srcaddr; then
+        _ipv6_flag="-6"
+    fi
+
+    while IFS="" read _route; do
+        if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
+            _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
+            # Parse multipath route, using previous _target
+            [[ "$_target" == 'default' ]] && continue
+            [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
+
+            _weight=`echo "$_route" | cut -d ' ' -f7`
+            if [[ "$_weight" -gt "$_max_weight" ]]; then
+                _nexthop=`echo "$_route" | cut -d ' ' -f3`
+                _max_weight=$_weight
+                if [ "x" !=  "x"$_ipv6_flag ]; then
+                    _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
+                else
+                    _rule="rd.route=$_target:$_nexthop:$_netdev"
+                fi
+            fi
+        else
+            [[ -n "$_rule" ]] && echo "$_rule"
+            _target=`echo "$_route" | cut -d ' ' -f1`
+            _rule="" _max_weight=0 _weight=0
+        fi
+    done >> ${initdir}/etc/cmdline.d/45route-static.conf\
+        < <(/sbin/ip $_ipv6_flag route show)
+
+    [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
 }

kdump_get_mac_addr() {

[Dave Young]

On 11/15/18 at 02:18pm, Kairui Song wrote:
> Currently we still don't support multipath route, when parsing multipath
> route kdumpctl will wrong consider 'nexthop' as the destination address,
> and raise errors in second kernel.
>
> When multipath route is in use, ip route output should be like this:
> $ /sbin/ip route show
> default via 192.168.122.1 dev ens1 proto dhcp metric 100
> 192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
> 192.168.122.8
>    nexthop via 192.168.122.1 dev ens1 weight 50
>    nexthop via 192.168.122.2 dev ens1 weight 5
>
> As we won't care about HA/performance, simply use the rule with highest
> weight and ignore the rest.
>
> dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index 2f9d762..7499678 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -126,7 +126,8 @@ kdump_static_ip() {
>          echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
>      fi
> /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
> /sbin/ip $_ipv6_flag route show | grep -v default |\
> grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
> while read _route; do
>     _target=`echo $_route | cut -d ' ' -f1`
>     _nexthop=`echo $_route | cut -d ' ' -f3`
>
> @@ -136,6 +137,44 @@ kdump_static_ip() {
>          fi
>          echo "rd.route=$_target:$_nexthop:$_netdev"
>      done >> ${initdir}/etc/cmdline.d/45route-static.conf
> kdump_handle_mulitpath_route $_netdev $_srcaddr
>
> +}
>
> +kdump_handle_mulitpath_route() {
> local _netdev="$1" _srcaddr="$2" _ipv6_flag
> local _target _nexthop _route _weight _max_weight _rule
> if is_ipv6_address $_srcaddr; then
>    _ipv6_flag="-6"
> fi
> while IFS="" read _route; do
>    if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
>        _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
>        # Parse multipath route, using previous _target
>        [[ "$_target" == 'default' ]] && continue
>        [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
>        _weight=`echo "$_route" | cut -d ' ' -f7`
>        if [[ "$_weight" -gt "$_max_weight" ]]; then
>            _nexthop=`echo "$_route" | cut -d ' ' -f3`
>            _max_weight=$_weight
>            if [ "x" !=  "x"$_ipv6_flag ]; then
>                _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
>            else
>                _rule="rd.route=$_target:$_nexthop:$_netdev"
>            fi
>        fi
>    else
>        [[ -n "$_rule" ]] && echo "$_rule"
>        _target=`echo "$_route" | cut -d ' ' -f1`
>        _rule="" _max_weight=0 _weight=0
>    fi
> done >> ${initdir}/etc/cmdline.d/45route-static.conf\
>    < <(/sbin/ip $_ipv6_flag route show)
> [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
>
> }
> kdump_get_mac_addr() {
>
> 2.17.1

Baoquan, Pingfan, can you review this patch?

Thanks
Dave

[Dave Young]

+ bhe for reviewing
On 11/19/18 at 04:56pm, Dave Young wrote:
> On 11/15/18 at 02:18pm, Kairui Song wrote:
> > Currently we still don't support multipath route, when parsing multipath
> > route kdumpctl will wrong consider 'nexthop' as the destination address,
> > and raise errors in second kernel.
> >
> > When multipath route is in use, ip route output should be like this:
> > $ /sbin/ip route show
> > default via 192.168.122.1 dev ens1 proto dhcp metric 100
> > 192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
> > 192.168.122.8
> >    nexthop via 192.168.122.1 dev ens1 weight 50
> >    nexthop via 192.168.122.2 dev ens1 weight 5
> >
> > As we won't care about HA/performance, simply use the rule with highest
> > weight and ignore the rest.
> >
> > dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 40 insertions(+), 1 deletion(-)
> >
> > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > index 2f9d762..7499678 100755
> > --- a/dracut-module-setup.sh
> > +++ b/dracut-module-setup.sh
> > @@ -126,7 +126,8 @@ kdump_static_ip() {
> >          echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
> >      fi
> > /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
> > /sbin/ip $_ipv6_flag route show | grep -v default |\
> > grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
> > while read _route; do
> >     _target=`echo $_route | cut -d ' ' -f1`
> >     _nexthop=`echo $_route | cut -d ' ' -f3`
> >
> > @@ -136,6 +137,44 @@ kdump_static_ip() {
> >          fi
> >          echo "rd.route=$_target:$_nexthop:$_netdev"
> >      done >> ${initdir}/etc/cmdline.d/45route-static.conf
> > kdump_handle_mulitpath_route $_netdev $_srcaddr
> >
> > +}
> >
> > +kdump_handle_mulitpath_route() {
> > local _netdev="$1" _srcaddr="$2" _ipv6_flag
> > local _target _nexthop _route _weight _max_weight _rule
> > if is_ipv6_address $_srcaddr; then
> >    _ipv6_flag="-6"
> > fi
> > while IFS="" read _route; do
> >    if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
> >        _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
> >        # Parse multipath route, using previous _target
> >        [[ "$_target" == 'default' ]] && continue
> >        [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
> >        _weight=`echo "$_route" | cut -d ' ' -f7`
> >        if [[ "$_weight" -gt "$_max_weight" ]]; then
> >            _nexthop=`echo "$_route" | cut -d ' ' -f3`
> >            _max_weight=$_weight
> >            if [ "x" !=  "x"$_ipv6_flag ]; then
> >                _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
> >            else
> >                _rule="rd.route=$_target:$_nexthop:$_netdev"
> >            fi
> >        fi
> >    else
> >        [[ -n "$_rule" ]] && echo "$_rule"
> >        _target=`echo "$_route" | cut -d ' ' -f1`
> >        _rule="" _max_weight=0 _weight=0
> >    fi
> > done >> ${initdir}/etc/cmdline.d/45route-static.conf\
> >    < <(/sbin/ip $_ipv6_flag route show)
> > [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
> >
> > }
> > kdump_get_mac_addr() {
> >
> > 2.17.1
>
> Baoquan, Pingfan, can you review this patch?
>
> Thanks
> Dave
> _______________________________________________
> kexec mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]

[Baoquan He]

On 11/15/18 at 02:18pm, Kairui Song wrote:
> Currently we still don't support multipath route, when parsing multipath
> route kdumpctl will wrong consider 'nexthop' as the destination address,

wrongly
> and raise errors in second kernel.
>
> When multipath route is in use, ip route output should be like this:
> $ /sbin/ip route show
> default via 192.168.122.1 dev ens1 proto dhcp metric 100
> 192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
> 192.168.122.8
>    nexthop via 192.168.122.1 dev ens1 weight 50
>    nexthop via 192.168.122.2 dev ens1 weight 5

I didn't find out a good doc about linux multipath route, just this one:
https://codecave.cc/multipath-routing-in-linux-part-2.html

It says ipv4 supports weighted multipath route, ipv6 hasn't, in v4.12.
But it may not impact this patch.
> As we won't care about HA/performance, simply use the rule with highest

don't
> weight and ignore the rest.
>
> dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
>  1 file changed, 40 insertions(+), 1 deletion(-)
>
> diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> index 2f9d762..7499678 100755
> --- a/dracut-module-setup.sh
> +++ b/dracut-module-setup.sh
> @@ -126,7 +126,8 @@ kdump_static_ip() {
>          echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
>      fi
> /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
> /sbin/ip $_ipv6_flag route show | grep -v default |\
> grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\

I am not sure if default gateway also has multiple weighted nexthop. Is
there a doc about this?

Otherwise this patch looks good to me.

Thanks
Baoquan
>  while read _route; do
>      _target=`echo $_route | cut -d ' ' -f1`
>      _nexthop=`echo $_route | cut -d ' ' -f3`
>
> @@ -136,6 +137,44 @@ kdump_static_ip() {
>          fi
>          echo "rd.route=$_target:$_nexthop:$_netdev"
>      done >> ${initdir}/etc/cmdline.d/45route-static.conf
> kdump_handle_mulitpath_route $_netdev $_srcaddr
>
> +}
>
> +kdump_handle_mulitpath_route() {
> local _netdev="$1" _srcaddr="$2" _ipv6_flag
> local _target _nexthop _route _weight _max_weight _rule
> if is_ipv6_address $_srcaddr; then
>    _ipv6_flag="-6"
> fi
> while IFS="" read _route; do
>    if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
>        _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
>        # Parse multipath route, using previous _target
>        [[ "$_target" == 'default' ]] && continue
>        [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
>        _weight=`echo "$_route" | cut -d ' ' -f7`
>        if [[ "$_weight" -gt "$_max_weight" ]]; then
>            _nexthop=`echo "$_route" | cut -d ' ' -f3`
>            _max_weight=$_weight
>            if [ "x" !=  "x"$_ipv6_flag ]; then
>                _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
>            else
>                _rule="rd.route=$_target:$_nexthop:$_netdev"
>            fi
>        fi
>    else
>        [[ -n "$_rule" ]] && echo "$_rule"
>        _target=`echo "$_route" | cut -d ' ' -f1`
>        _rule="" _max_weight=0 _weight=0
>    fi
> done >> ${initdir}/etc/cmdline.d/45route-static.conf\
>    < <(/sbin/ip $_ipv6_flag route show)
> [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
>
> }
> kdump_get_mac_addr() {
>
> 2.17.1
> _______________________________________________
> kexec mailing list -- [e-mail]
> To unsubscribe send an email to [e-mail]
> Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]

[Kairui Song]

Hi Baoquan, thanks for the review!

Unfortunately, I didn't find any better doc than you do, I take
iproute2's manpage and code
(https://github.com/shemminger/iproute2/blob/707f612c00a91fe3c17d7af5319e4235...)
as the reference and did some experiment if there are any confusing.
And default gateway can have multiple weighted nexthop.
On Mon, Nov 26, 2018 at 4:10 PM Baoquan He  wrote:
> On 11/15/18 at 02:18pm, Kairui Song wrote:
> > Currently we still don't support multipath route, when parsing multipath
> > route kdumpctl will wrong consider 'nexthop' as the destination address,
>                     wrongly
> > and raise errors in second kernel.
> >
> > When multipath route is in use, ip route output should be like this:
> > $ /sbin/ip route show
> > default via 192.168.122.1 dev ens1 proto dhcp metric 100
> > 192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
> > 192.168.122.8
> >       nexthop via 192.168.122.1 dev ens1 weight 50
> >       nexthop via 192.168.122.2 dev ens1 weight 5
>
> I didn't find out a good doc about linux multipath route, just this one:
> https://codecave.cc/multipath-routing-in-linux-part-2.html
>
> It says ipv4 supports weighted multipath route, ipv6 hasn't, in v4.12.
> But it may not impact this patch.
> > As we won't care about HA/performance, simply use the rule with highest
>     don't
> > weight and ignore the rest.
> >
> > dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
> >  1 file changed, 40 insertions(+), 1 deletion(-)
> >
> > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > index 2f9d762..7499678 100755
> > --- a/dracut-module-setup.sh
> > +++ b/dracut-module-setup.sh
> > @@ -126,7 +126,8 @@ kdump_static_ip() {
> >          echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
> >      fi
> > /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
> > /sbin/ip $_ipv6_flag route show | grep -v default |\
> > grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
>
> I am not sure if default gateway also has multiple weighted nexthop. Is
> there a doc about this?
>
> Otherwise this patch looks good to me.
>
> Thanks
> Baoquan
> >  while read _route; do
> >      _target=`echo $_route | cut -d ' ' -f1`
> >      _nexthop=`echo $_route | cut -d ' ' -f3`
> >
> > @@ -136,6 +137,44 @@ kdump_static_ip() {
> >          fi
> >          echo "rd.route=$_target:$_nexthop:$_netdev"
> >      done >> ${initdir}/etc/cmdline.d/45route-static.conf
> > kdump_handle_mulitpath_route $_netdev $_srcaddr
> >
> > +}
> >
> > +kdump_handle_mulitpath_route() {
> > local _netdev="$1" _srcaddr="$2" _ipv6_flag
> > local _target _nexthop _route _weight _max_weight _rule
> > if is_ipv6_address $_srcaddr; then
> >    _ipv6_flag="-6"
> > fi
> > while IFS="" read _route; do
> >    if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
> >        _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
> >        # Parse multipath route, using previous _target
> >        [[ "$_target" == 'default' ]] && continue
> >        [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
> >        _weight=`echo "$_route" | cut -d ' ' -f7`
> >        if [[ "$_weight" -gt "$_max_weight" ]]; then
> >            _nexthop=`echo "$_route" | cut -d ' ' -f3`
> >            _max_weight=$_weight
> >            if [ "x" !=  "x"$_ipv6_flag ]; then
> >                _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
> >            else
> >                _rule="rd.route=$_target:$_nexthop:$_netdev"
> >            fi
> >        fi
> >    else
> >        [[ -n "$_rule" ]] && echo "$_rule"
> >        _target=`echo "$_route" | cut -d ' ' -f1`
> >        _rule="" _max_weight=0 _weight=0
> >    fi
> > done >> ${initdir}/etc/cmdline.d/45route-static.conf\
> >    < <(/sbin/ip $_ipv6_flag route show)
> > [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
> >
> > }
> > kdump_get_mac_addr() {
> >
> > 2.17.1
> > _______________________________________________
> > kexec mailing list -- [e-mail]
> > To unsubscribe send an email to [e-mail]
> > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]

[Baoquan He]

On 11/26/18 at 04:58pm, Kairui Song wrote:
> Hi Baoquan, thanks for the review!
>
> Unfortunately, I didn't find any better doc than you do, I take
> iproute2's manpage and code
> (https://github.com/shemminger/iproute2/blob/707f612c00a91fe3c17d7af5319e4235...)
> as the reference and did some experiment if there are any confusing.
> And default gateway can have multiple weighted nexthop.

OK, that's good.

You can have my Acked-by when you merge it with tiny adjustment in log.

Thanks
Baoquan
> On Mon, Nov 26, 2018 at 4:10 PM Baoquan He  wrote:
> > On 11/15/18 at 02:18pm, Kairui Song wrote:
> > > Currently we still don't support multipath route, when parsing multipath
> > > route kdumpctl will wrong consider 'nexthop' as the destination address,
> >                     wrongly
> > > and raise errors in second kernel.
> > >
> > > When multipath route is in use, ip route output should be like this:
> > > $ /sbin/ip route show
> > > default via 192.168.122.1 dev ens1 proto dhcp metric 100
> > > 192.168.122.0/24 dev ens1 proto kernel scope link src 192.168.122.161 metric 100
> > > 192.168.122.8
> > >       nexthop via 192.168.122.1 dev ens1 weight 50
> > >       nexthop via 192.168.122.2 dev ens1 weight 5
> >
> > I didn't find out a good doc about linux multipath route, just this one:
> > https://codecave.cc/multipath-routing-in-linux-part-2.html
> >
> > It says ipv4 supports weighted multipath route, ipv6 hasn't, in v4.12.
> > But it may not impact this patch.
> > > As we won't care about HA/performance, simply use the rule with highest
> >     don't
> > > weight and ignore the rest.
> > >
> > > dracut-module-setup.sh | 41 ++++++++++++++++++++++++++++++++++++++++-
> > >  1 file changed, 40 insertions(+), 1 deletion(-)
> > >
> > > diff --git a/dracut-module-setup.sh b/dracut-module-setup.sh
> > > index 2f9d762..7499678 100755
> > > --- a/dracut-module-setup.sh
> > > +++ b/dracut-module-setup.sh
> > > @@ -126,7 +126,8 @@ kdump_static_ip() {
> > >          echo -n "${_srcaddr}::${_gateway}:${_netmask}::"
> > >      fi
> > > /sbin/ip $_ipv6_flag route show | grep -v default | grep ".*via.* $_netdev " |\
> > > /sbin/ip $_ipv6_flag route show | grep -v default |\
> > > grep ".*via.* $_netdev " | grep -v "^[[:space:]]*nexthop" |\
> >
> > I am not sure if default gateway also has multiple weighted nexthop. Is
> > there a doc about this?
> >
> > Otherwise this patch looks good to me.
> >
> > Thanks
> > Baoquan
> > >  while read _route; do
> > >      _target=`echo $_route | cut -d ' ' -f1`
> > >      _nexthop=`echo $_route | cut -d ' ' -f3`
> > >
> > > @@ -136,6 +137,44 @@ kdump_static_ip() {
> > >          fi
> > >          echo "rd.route=$_target:$_nexthop:$_netdev"
> > >      done >> ${initdir}/etc/cmdline.d/45route-static.conf
> > > kdump_handle_mulitpath_route $_netdev $_srcaddr
> > >
> > > +}
> > >
> > > +kdump_handle_mulitpath_route() {
> > > local _netdev="$1" _srcaddr="$2" _ipv6_flag
> > > local _target _nexthop _route _weight _max_weight _rule
> > > if is_ipv6_address $_srcaddr; then
> > >    _ipv6_flag="-6"
> > > fi
> > > while IFS="" read _route; do
> > >    if [[ "$_route" =~ [[:space:]]+nexthop ]]; then
> > >        _route=$(echo "$_route" | sed -e 's/^[[:space:]]*//')
> > >        # Parse multipath route, using previous _target
> > >        [[ "$_target" == 'default' ]] && continue
> > >        [[ "$_route" =~ .*via.*\ $_netdev ]] || continue
> > >        _weight=`echo "$_route" | cut -d ' ' -f7`
> > >        if [[ "$_weight" -gt "$_max_weight" ]]; then
> > >            _nexthop=`echo "$_route" | cut -d ' ' -f3`
> > >            _max_weight=$_weight
> > >            if [ "x" !=  "x"$_ipv6_flag ]; then
> > >                _rule="rd.route=[$_target]:[$_nexthop]:$_netdev"
> > >            else
> > >                _rule="rd.route=$_target:$_nexthop:$_netdev"
> > >            fi
> > >        fi
> > >    else
> > >        [[ -n "$_rule" ]] && echo "$_rule"
> > >        _target=`echo "$_route" | cut -d ' ' -f1`
> > >        _rule="" _max_weight=0 _weight=0
> > >    fi
> > > done >> ${initdir}/etc/cmdline.d/45route-static.conf\
> > >    < <(/sbin/ip $_ipv6_flag route show)
> > > [[ -n $_rule ]] && echo $_rule >> ${initdir}/etc/cmdline.d/45route-static.conf
> > >
> > > }
> > > kdump_get_mac_addr() {
> > >
> > > 2.17.1
> > > _______________________________________________
> > > kexec mailing list -- [e-mail]
> > > To unsubscribe send an email to [e-mail]
> > > Fedora Code of Conduct: https://getfedora.org/code-of-conduct.html
> > > List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines
> > > List Archives: https://lists.fedoraproject.org/archives/list/[e-mail]
>
> -- 
> Best Regards,
> Kairui Song