File kdump-Restore-only-static-routes-in-kdump-initr... of Package kdump

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File kdump-Restore-only-static-routes-in-kdump-initrd.patch of Package kdump

From: Petr Tesarik <ptesarik@suse.com>
Date: Thu, 24 May 2018 06:54:28 +0200
Subject: Restore only static routes in kdump initrd
References: bsc#1093795
Upstream: merged
Git-commit: c4484c33a5b228d4a1ebe7c99f14c3b7f38f34ef

All existing routes are now added through the rd.route= dracut
parameter. However, this includes routes that need not or should not
be added explicitly (e.g. installed automatically by the kernel or
dynamically by a routing daemon).

If possible, use wicked to get configured routes. If not, use the
routing protocol identifier to limit the list.

Signed-off-by: Petr Tesarik <ptesarik@suse.com>
---
 init/setup-kdump.functions |   86 ++++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 77 insertions(+), 9 deletions(-)

--- a/init/setup-kdump.functions
+++ b/init/setup-kdump.functions
@@ -518,6 +518,42 @@ kdump_prefix2netmask() {						   # {{{
 }									   # }}}
 
 #
+# Get the IPv4 rd.route= parameters for a given device
+#
+# Parameters:
+#   1) iface   current interface name
+#   2) bootif  interface name in initrd
+# Output:
+#   string that can be used for the rd.route= initrd parameter
+function kdump_ip_routes()						   # {{{
+{
+    local _iface="$1"
+    local _bootif="$2"
+
+    # remove default routes
+    local _rmdefault='/^default /d'
+    # transform the output of "ip route" into rd.route=
+    local _xform='s/$[^ ]*$$ via \([^ ]*$\)\?.*/rd.route=\1:\3/'
+    # add interface name and print
+    local _addintf="s/\$/:${_bootif}/p"
+
+    # get configured routes using wicked if possible
+    if [ -n "$(type -P wicked)" ]
+    then
+	wicked show-config | \
+	    wicked xpath --reference \
+		   "/interface[name='$_iface']/ipv4:static/route" \
+		   "rd.route=%{destination}:%{?nexthop/gateway}:$_bootif" \
+		   2>/dev/null
+    else
+        ip route show dev "$_iface" proto boot | \
+	    sed -ne "$_rmdefault;$_xform;$_addintf"
+        ip route show dev "$_iface" proto static | \
+	    sed -ne "$_rmdefault;$_xform;$_addintf"
+    fi
+}									   # }}}
+
+#
 # Get the IPv4 ip= parameter for a given device
 #
 # Parameters:
@@ -556,12 +592,47 @@ function kdump_ip_config()						   # {{{
 
     if [ -n "$ipaddr" ] ; then
         echo "ip=$ipaddr:$peeraddr:$gwaddr:$netmask:$hostname:$bootif:none"
+	kdump_ip_routes "$iface" "$bootif"
+    fi
+}									   # }}}
+
+#
+# Get the IPv6 rd.route= parameters for a given device
+#
+# Parameters:
+#   1) iface   current interface name
+#   2) bootif  interface name in initrd
+# Output:
+#   string that can be used for the rd.route= initrd parameter
+function kdump_ip6_routes()						   # {{{
+{
+    local _iface="$1"
+    local _bootif="$2"
 
-        routes=$(ip route show dev "$iface" | sed -n 's/$[0-9].*$ via $[^ ]*$.*/\1:\2/p')
-        for r in $routes ; do
-            echo "rd.route=$r:$bootif"
-        done
-    fi 
+    # remove default routes
+    local _rmdefault='/^default /d'
+    # transform the output of "ip route" into rd.route=
+    local _xform='s/$[^ ]*$$ via \([^ ]*$\)\?.*/rd.route=[\1]:[\3]/'
+    # remove gateway if empty
+    local _rmgw='s/\[\]$//'
+    # add interface name and print
+    local _addintf="s/\$/:${_bootif}/p"
+
+    # get configured routes using wicked if possible
+    if [ -n "$(type -P wicked)" ]
+    then
+	wicked show-config | \
+	    wicked xpath \
+		   --reference "/interface[name='$_iface']/ipv6:static/route" \
+		   "rd.route=[%{destination}]:[%{?nexthop/gateway}]" \
+		   2>/dev/null | \
+	    sed -ne "$_rmgw;$_addintf"
+    else
+        ip -6 route show dev "$_iface" proto boot | \
+	    sed -ne "$_rmdefault;$_xform;$_rmgw;$_addintf"
+        ip -6 route show dev "$_iface" proto static | \
+	    sed -ne "$_rmdefault;$_xform;$_rmgw;$_addintf"
+    fi
 }									   # }}}
 
 #
@@ -604,10 +675,7 @@ function kdump_ip6_config()						   # {{
 	echo "ip=$ipaddr:$peeraddr:$gwaddr:$netmask:$hostname:$bootif:none"
     done < <(ip -6 address show dev "$iface" permanent scope global)
 
-    routes=$(ip -6 route show dev "$iface" | sed -n 's/$[0-9a-fA-F:].*$ via $[^ ]*$.*/[\1]:[\2]/p')
-    for r in $routes ; do
-        echo "rd.route=$r:$bootif"
-    done
+    kdump_ip6_routes "$iface" "$bootif"
 }									   # }}}
 
 #

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File kdump-Restore-only-static-routes-in-kdump-initrd.patch of Package kdump

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