From c4c24171bfbffd7bb75a75b8ceae18ce7296cac6 Mon Sep 17 00:00:00 2001

From: Harald Hoyer <harald@redhat.com>

Date: Fri, 24 Oct 2014 15:47:24 +0200

Subject: [PATCH] ifcfg/write-ifcfg: only write DEVICE for non-kernel names

Rename an interface to the kernel namespace is not allowed, so don't add

DEVICE="<iface>", if HWADDR is given.

(cherry picked from commit 3947f07d93cde5e1cf0d788537e93b135d6c27b0)

---

 modules.d/40network/net-lib.sh   | 46 ++++++++++++++++++++++++++++++-

 modules.d/45ifcfg/write-ifcfg.sh | 59 ++++++++++++++++++++++++++--------------

 2 files changed, 84 insertions(+), 21 deletions(-)

diff --git a/modules.d/40network/net-lib.sh b/modules.d/40network/net-lib.sh

index 22f7754..337817e 100755

--- a/modules.d/40network/net-lib.sh

+++ b/modules.d/40network/net-lib.sh

@@ -553,7 +553,19 @@ find_iface_with_link() {

 }

 is_persistent_ethernet_name() {

-    case "$1" in

+    local _netif="$1"

+    local _name_assign_type="0"

+

+    [ -f "/sys/class/net/$_netif/name_assign_type" ] \

+        && _name_assign_type=$(cat "/sys/class/net/$_netif/name_assign_type")

+

+    # NET_NAME_ENUM 1

+    [ "$_name_assign_type" = "1" ] && return 1

+

+    # NET_NAME_PREDICTABLE 2

+    [ "$_name_assign_type" = "2" ] && return 0

+

+    case "$_netif" in

         # udev persistent interface names

         eno[0-9]|eno[0-9][0-9]|eno[0-9][0-9][0-9]*)

             ;;

@@ -573,3 +585,35 @@ is_persistent_ethernet_name() {

     esac

     return 0

 }

+

+is_kernel_ethernet_name() {

+    local _netif="$1"

+    local _name_assign_type="1"

+

+    if [ -e "/sys/class/net/$_netif/name_assign_type" ]; then

+        _name_assign_type=$(cat "/sys/class/net/$_netif/name_assign_type")

+

+        case "$_name_assign_type" in

+            2|3|4)

+                # NET_NAME_PREDICTABLE 2

+                # NET_NAME_USER 3

+                # NET_NAME_RENAMED 4

+                return 1

+                ;;

+            1|*)

+                # NET_NAME_ENUM 1

+                return 0

+                ;;

+        esac

+    fi

+

+    # fallback to error prone manual name check

+    case "$_netif" in

+        eth[0-9]|eth[0-9][0-9]|eth[0-9][0-9][0-9]*)

+            return 0

+            ;;

+        *)

+            return 1

+    esac

+

+}

diff --git a/modules.d/45ifcfg/write-ifcfg.sh b/modules.d/45ifcfg/write-ifcfg.sh

index aed3069..a1bae72 100755

--- a/modules.d/45ifcfg/write-ifcfg.sh

+++ b/modules.d/45ifcfg/write-ifcfg.sh

@@ -82,18 +82,41 @@ print_s390() {

     return 0

 }

+hw_bind() {

+    local _netif="$1"

+    local _macaddr="$2"

+

+    [ -n "$_macaddr" ] \

+        && echo "MACADDR=\"$_macaddr\""

+

+    print_s390 "$_netif" \

+        && return 0

+

+    [ -n "$_macaddr" ] && return 0

+

+    is_persistent_ethernet_name "$_netif" && return 0

+

+    [ -f "/sys/class/net/$_netif/addr_assign_type" ] \

+        && [ "$(cat "/sys/class/net/$_netif/addr_assign_type")" != "0" ] \

+        && return 1

+

+    [ -f "/sys/class/net/$_netif/address" ] \

+        || return 1

+

+    echo "HWADDR=\"$(cat /sys/class/net/$_netif/address)\""

+}

+

 interface_bind() {

-    local netif="$1"

-    local macaddr="$2"

-    if ! print_s390 $netif; then

-        if [ -z "$macaddr" ] && \

-            ! is_persistent_ethernet_name "$netif" && \

-            [ -f /sys/class/net/$netif/addr_assign_type ] && \

-            [ "$(cat /sys/class/net/$netif/addr_assign_type)" = "0" ] && \

-            [ -f /sys/class/net/$netif/address ]; then

-            echo "HWADDR=\"$(cat /sys/class/net/$netif/address)\""

-        fi

+    local _netif="$1"

+    local _macaddr="$2"

+

+    # see, if we can bind it to some hw parms

+    if hw_bind "$_netif" "$_macaddr"; then

+        # only print out DEVICE, if it's user assigned

+        is_kernel_ethernet_name "$_netif" && return 0

     fi

+

+    echo "DEVICE=\"$_netif\""

 }

 for netup in /tmp/net.*.did-setup ; do

@@ -131,7 +154,8 @@ for netup in /tmp/net.*.did-setup ; do

     {

         echo "# Generated by dracut initrd"

-        echo "DEVICE=\"$netif\""

+        echo "NAME=\"$netif\""

+        interface_bind "$netif" "$macaddr"

         echo "ONBOOT=yes"

         echo "NETBOOT=yes"

         echo "UUID=\"$uuid\""

@@ -177,10 +201,7 @@ for netup in /tmp/net.*.did-setup ; do

     if [ -z "$bridge" ] && [ -z "$bond" ] && [ -z "$vlan" ]; then

         # standard interface

         {

-            [ -n "$macaddr" ] && echo "MACADDR=\"$macaddr\""

-            interface_bind "$netif" "$macaddr"

             echo "TYPE=Ethernet"

-            echo "NAME=\"$netif\""

             [ -n "$mtu" ] && echo "MTU=\"$mtu\""

         } >> /tmp/ifcfg/ifcfg-$netif

     fi

@@ -207,16 +228,15 @@ for netup in /tmp/net.*.did-setup ; do

             # write separate ifcfg file for the raw eth interface

             (

                 echo "# Generated by dracut initrd"

-                echo "DEVICE=\"$slave\""

+                echo "NAME=\"$slave\""

                 echo "TYPE=Ethernet"

                 echo "ONBOOT=yes"

                 echo "NETBOOT=yes"

                 echo "SLAVE=yes"

                 echo "MASTER=\"$netif\""

-                echo "NAME=\"$slave\""

                 echo "UUID=\"$(cat /proc/sys/kernel/random/uuid)\""

+                unset macaddr

                 [ -e /tmp/net.$slave.override ] && . /tmp/net.$slave.override

-                [ -n "$macaddr" ] && echo "MACADDR=\"$macaddr\""

                 interface_bind "$slave" "$macaddr"

             ) >> /tmp/ifcfg/ifcfg-$slave

         done

@@ -232,15 +252,14 @@ for netup in /tmp/net.*.did-setup ; do

             # write separate ifcfg file for the raw eth interface

             (

                 echo "# Generated by dracut initrd"

-                echo "DEVICE=\"$slave\""

+                echo "NAME=\"$slave\""

                 echo "TYPE=Ethernet"

                 echo "ONBOOT=yes"

                 echo "NETBOOT=yes"

                 echo "BRIDGE=\"$bridgename\""

-                echo "NAME=\"$slave\""

                 echo "UUID=\"$(cat /proc/sys/kernel/random/uuid)\""

+                unset macaddr

                 [ -e /tmp/net.$slave.override ] && . /tmp/net.$slave.override

-                [ -n "$macaddr" ] && echo "MACADDR=\"$macaddr\""

                 interface_bind "$slave" "$macaddr"

             ) >> /tmp/ifcfg/ifcfg-$slave

         done