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From 6b827761075266ebaf1ef10cc0a640445f02dbe1 Mon Sep 17 00:00:00 2001
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From: Lukas Nykryn <lnykryn@redhat.com>
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Date: Mon, 7 Oct 2019 16:48:09 +0200
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Subject: [PATCH] net-lib: check if addr exists before checking for dad state
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Before we check if dad is done we should first make sure,
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that there is a link local address where we do the check.
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Due to this issue, on ipv6 only setups sometimes dhclient started
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asking for ip address, before the link local address was present
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and failed immediately.
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---
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modules.d/40network/net-lib.sh | 2 ++
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1 file changed, 2 insertions(+)
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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 35e6e833..3f2fc712 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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@@ -645,6 +645,7 @@ wait_for_ipv6_dad_link() {
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timeout=$(($timeout*10))
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while [ $cnt -lt $timeout ]; do
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+ [ -n "$(ip -6 addr show dev "$1" scope link)" ] \
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[ -z "$(ip -6 addr show dev "$1" scope link tentative)" ] \
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&& return 0
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[ -n "$(ip -6 addr show dev "$1" scope link dadfailed)" ] \
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@@ -662,6 +663,7 @@ wait_for_ipv6_dad() {
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timeout=$(($timeout*10))
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while [ $cnt -lt $timeout ]; do
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+ [ -n "$(ip -6 addr show dev "$1")" ] \
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[ -z "$(ip -6 addr show dev "$1" tentative)" ] \
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&& return 0
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[ -n "$(ip -6 addr show dev "$1" dadfailed)" ] \
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