From: Martin Wilck <mwilck@suse.com>
Date: Sat, 17 Sep 2022 21:05:39 +0000 (+0200)
Subject: fix(network): don't use same ifname multiple times
X-Git-Tag: 058~130
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f4e9ea879f38bea92069e9397028caa5d81e5aee;p=thirdparty%2Fdracut.git

fix(network): don't use same ifname multiple times

If multiple ibft interfaces exist, set_ifname() may reuse the same
name (usually "ibft0"), because it's usually called cmdline time,
when no interfaces exist in sysfs yet. Remember the number used
set and don't use it again.
---

diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh
index a294a3902..8b876926d 100755
--- a/modules.d/40network/net-lib.sh
+++ b/modules.d/40network/net-lib.sh
@@ -222,6 +222,7 @@ set_ifname() {
     for n in $(getargs ifname=); do
         strstr "$n" "$mac" && echo "${n%%:*}" && return
     done
+    [ ! -f "/tmp/set_ifname_$name" ] || read -r num < "/tmp/set_ifname_$name"
     # otherwise, pick a new name and use that
     while :; do
         num=$((num + 1))
@@ -232,6 +233,7 @@ set_ifname() {
         break
     done
     echo "ifname=$name$num:$mac" >> /etc/cmdline.d/45-ifname.conf
+    echo "$num" > "/tmp/set_ifname_$name"
     echo "$name$num"
 }