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From 26273649dcfbc095c8e9dbc0f65bb02fd90ee510 Mon Sep 17 00:00:00 2001
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From: Pingfan Liu <piliu@redhat.com>
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Date: Tue, 24 Apr 2018 16:41:21 +0800
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Subject: [PATCH] 40network: introduce ip=either6 option
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In kdump, if dump-target is ssh on ipv6, we need to sync until ipv6 addr
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is ready. Currently ip=auto6/dhcp6 provides such function. But in 1st kernel,
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it is hard to know whether the ipv6 addr is got by dhcpv6 or SLAAC.
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E.g ifcfg-eth* contains DHCPV6C=yes direction, but there is no dhcpv6
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server in the network, and then after the system is up, the user
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echo 1 > /proc/sys/net/ipv6/conf/eth0/autoconf && accept_ra by manual
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to obtain a ipv6 addr. Or vice.
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So this patch suggests to make dhcpv6 as auto6 fallback
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Signed-off-by: Pingfan Liu <piliu@redhat.com>
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Cherry-picked from: 67354ee
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Resolves: #1582398
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---
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dracut.cmdline.7.asc | 4 +++-
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modules.d/40network/ifup.sh | 6 +++++-
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modules.d/40network/net-lib.sh | 4 ++--
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modules.d/40network/parse-ip-opts.sh | 1 +
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4 files changed, 11 insertions(+), 4 deletions(-)
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diff --git a/dracut.cmdline.7.asc b/dracut.cmdline.7.asc
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index 45902fa9..1204aeb2 100644
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--- a/dracut.cmdline.7.asc
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+++ b/dracut.cmdline.7.asc
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@@ -449,7 +449,7 @@ USB Android phone::
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* enp0s29u1u2
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=====================
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-**ip=**__{dhcp|on|any|dhcp6|auto6}__::
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+**ip=**__{dhcp|on|any|dhcp6|auto6|either6}__::
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dhcp|on|any::: get ip from dhcp server from all interfaces. If root=dhcp,
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loop sequentially through all interfaces (eth0, eth1, ...) and use the first
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with a valid DHCP root-path.
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@@ -458,6 +458,8 @@ USB Android phone::
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dhcp6::: IPv6 DHCP
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+ either6::: if auto6 fails, then dhcp6
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+
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**ip=**__<interface>__:__{dhcp|on|any|dhcp6|auto6}__[:[__<mtu>__][:__<macaddr>__]]::
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This parameter can be specified multiple times.
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+
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diff --git a/modules.d/40network/ifup.sh b/modules.d/40network/ifup.sh
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index 9ed48155..b3631648 100755
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--- a/modules.d/40network/ifup.sh
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+++ b/modules.d/40network/ifup.sh
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@@ -76,6 +76,7 @@ load_ipv6() {
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}
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do_ipv6auto() {
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+ local ret
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load_ipv6
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echo 0 > /proc/sys/net/ipv6/conf/$netif/forwarding
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echo 1 > /proc/sys/net/ipv6/conf/$netif/accept_ra
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@@ -84,10 +85,11 @@ do_ipv6auto() {
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[ -n "$macaddr" ] && ip link set address $macaddr dev $netif
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[ -n "$mtu" ] && ip link set mtu $mtu dev $netif
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wait_for_ipv6_auto $netif
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+ ret=$?
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[ -n "$hostname" ] && echo "echo $hostname > /proc/sys/kernel/hostname" > /tmp/net.$netif.hostname
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- return 0
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+ return $ret
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}
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# Handle static ip configuration
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@@ -393,6 +395,8 @@ for p in $(getargs ip=); do
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do_dhcp -6 ;;
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auto6)
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do_ipv6auto ;;
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+ either6)
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+ do_ipv6auto || do_dhcp -6 ;;
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*)
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do_static ;;
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esac
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diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh
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index 23f2f9ff..9e87aeab 100755
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--- a/modules.d/40network/net-lib.sh
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+++ b/modules.d/40network/net-lib.sh
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@@ -445,7 +445,7 @@ ip_to_var() {
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fi
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if [ $# -eq 1 ]; then
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- # format: ip={dhcp|on|any|dhcp6|auto6}
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+ # format: ip={dhcp|on|any|dhcp6|auto6|either6}
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# or
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# ip=<ipv4-address> means anaconda-style static config argument cluster
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autoconf="$1"
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@@ -472,7 +472,7 @@ ip_to_var() {
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return 0
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fi
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- if [ "$2" = "dhcp" -o "$2" = "on" -o "$2" = "any" -o "$2" = "dhcp6" -o "$2" = "auto6" ]; then
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+ if [ "$2" = "dhcp" -o "$2" = "on" -o "$2" = "any" -o "$2" = "dhcp6" -o "$2" = "auto6" -o "$2" = "either6" ]; then
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# format: ip=<interface>:{dhcp|on|any|dhcp6|auto6}[:[<mtu>][:<macaddr>]]
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[ -n "$1" ] && dev="$1"
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[ -n "$2" ] && autoconf="$2"
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diff --git a/modules.d/40network/parse-ip-opts.sh b/modules.d/40network/parse-ip-opts.sh
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index 68afe91b..3d1e95a6 100755
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--- a/modules.d/40network/parse-ip-opts.sh
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+++ b/modules.d/40network/parse-ip-opts.sh
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@@ -78,6 +78,7 @@ for p in $(getargs ip=); do
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die "Sorry, automatic calculation of netmask is not yet supported"
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;;
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auto6);;
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+ either6);;
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dhcp|dhcp6|on|any) \
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#[ -n "$NEEDBOOTDEV" ] && [ -z "$dev" ] && \
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# die "Sorry, 'ip=$p' does not make sense for multiple interface configurations"
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