Attachment 117827 Details for Bug 230213

Eikes rename_netiface

rename_netiface (text/plain), 6.30 KB, created by Eike Auler on 2007-02-07 14:00:52 UTC

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Creator: Eike Auler

Created: 2007-02-07 14:00:52 UTC

Size: 6.30 KB

patch

obsolete

>#! /bin/bash
>#
>PATH="/sbin:/bin"
>
>declare -i MAXLOOPS=40          #
>declare -i LOOPDELAY=500000     # useconds
>declare -i MAXIFNUM=1024        #
>RULE_FILE=/etc/udev/rules.d/30-net_persistent_names.rules
>USED_IFACE_FILE_STUB=/tmp/used_interface_names
>USED_IFACE_FILE="`mktemp $USED_IFACE_FILE_STUB.XXXXXXXX`"
>
>STAMPFILE=/tmp/dummy_stamp
>trap 'rm -f $USED_IFACE_FILE
>      echo renamed > $STAMPFILE
>      echo INTERFACE=$INTERFACE
>      echo DEVPATH=${DEVPATH%/*}/$INTERFACE
>      echo RENAMED=yes' EXIT
>
>. /etc/sysconfig/network/config
>. /etc/sysconfig/network/scripts/functions
>
>if [ -r /sys/class/net/$1/ifindex ] ; then
>	STAMPFILE=$STAMPFILE_STUB`cat /sys/class/net/$1/ifindex`
>else
>	STAMPFILE=${STAMPFILE_STUB}no_iface
>fi
>echo virgin > $STAMPFILE
>
>if [ "$FORCE_PERSISTENT_NAMES" != yes ] ; then
>	info_mesg "No persistent names wanted"
>	exit 0
>fi
>
>#exec 2>>/tmp/rename_netiface.$1-$2.$SEQNUM.log
>#set -x
>
>error_exit() {
>	local RET
>	declare -i RET=$1
>	if [ $RET -ne "$1" ] ; then
>		RET=255
>	else
>		shift
>	fi
>	err_mesg "$@"
>	exit $RET
>}
>
>usage() {
>	mesg "usage: $0 <oldname> [<newname>]" >&2
>	error_exit $*
>}
>
>check_if_name_is_free() {
>	grep -qs "^[^#].*rename_netiface %k $NEWNAME\"" $RULE_FILE && return 1
>	cat $USED_IFACE_FILE_STUB* \
>	    | grep -vs "$DEV_ID" \
>	    | grep -q "^$NEWNAME" && return 1
>	echo $NEWNAME $DEV_ID >> $USED_IFACE_FILE
>	usleep $((RANDOM%600+700))000
>	cat $USED_IFACE_FILE_STUB* \
>	    | grep -vs "$DEV_ID" \
>	    | grep -q "^$NEWNAME" && return 1
>	return 0
>}
>
># Return 0 only if rule was successfully written (if needed of course)
>write_rule() {
>	test "$WRITE_RULE" == yes || return 0
>	check_if_name_is_free || return 1
>	if [ "$PHYSDEVBUS" == ccwgroup ] ; then
>		echo "SUBSYSTEM==\"net\", ACTION==\"add\"," \
>		     "ENV{PHYSDEVPATH}==\"*$DEV_ID\"," \
>		     "IMPORT=\"/lib/udev/rename_netiface %k $NEWNAME\"" \
>		     >> $RULE_FILE
>	elif [ "$NOMAC_HACK_APPLIED" == yes ] ; then
>		echo "SUBSYSTEM==\"net\", ACTION==\"add\"," \
>		     "ENV{ADDRESS}==\"$DEV_ID\"," \
>		     "IMPORT=\"/lib/udev/rename_netiface %k $NEWNAME\"" \
>		     >> $RULE_FILE
>	else
>		echo "SUBSYSTEM==\"net\", ACTION==\"add\"," \
>		     "SYSFS{address}==\"$DEV_ID\"," \
>		     "IMPORT=\"/lib/udev/rename_netiface %k $NEWNAME\"" \
>		     >> $RULE_FILE
>	fi
>	/sbin/udevcontrol reload_rules || return 1
>	info_mesg "New rule for $DEV_ID added."
>}
>
>test $# -gt 2 && usage 1 "too many arguments: $*"
>OLDNAME=$1
>NEWNAME=$2
>test -z "$OLDNAME" && usage 2 "too little arguments"
>ls /sys/class/net/$OLDNAME 2>/dev/null 1>&2 \
>    || error_exit 3 "oldname $OLDNAME does not exist"
>NAMEBASE=${OLDNAME%%[0-9]*}
>case "$NAMEBASE" in
>	eth|ath|wlan|ra|hsi|ctc|tr)
>		: go on
>		;;
>	*)
>		exit 0
>		;;
>esac
># Also check if interface is not an vlan interface
>test -f "/proc/net/vlan/$OLDNAME" && exit 0
>declare -i IFNUM=${OLDNAME##$NAMEBASE}
>
>if [ "$PHYSDEVBUS" == ccwgroup ] ; then
>	get_device_id() {
>		if [ -z "$PHYSDEVPATH" -a -L /sys/class/net/$1/device ] ; then
>			PHYSDEVPATH=`cd -P /sys/class/net/$1/device; pwd`
>			PHYSDEVPATH=${PHYSDEVPATH#/sys}
>		fi
>		if [ -n "$PHYSDEVPATH" -a -d /sys/$PHYSDEVPATH ] ; then
>			DEV_ID=${PHYSDEVPATH##*/}
>		else
>			DEV_ID=$2
>		fi
>	}
>else
>	get_device_id() {
>		if ls /sys/class/net/$1 2>/dev/null 1>&2; then
>			DEV_ID=`cat /sys/class/net/$1/address`
>		else
>			DEV_ID=$2
>		fi
>	}
>fi
>
>if [ -z "$NEWNAME" ] ; then
>	# This routine looks for a network interface name that is still not
>	# used as persistent name. At first it tries the name the interface
>	# currently has. If this name is already occupied, then increase the
>	# number and try again.
>	# To check if a name is occupied we have to look in
>	# /etc/udev/rules.d/60-net_*.rules and in /tmp/used_interface_names*.
>	# The latter serves as temporary registration file to avoid race
>	# conditions. It will be removed when the script exits.
>
>	NEWNAME=$OLDNAME
>	get_device_id "$OLDNAME" "$2"
>	if [ -z "$DEV_ID" ] ; then
>		error_exit 4 "no device id for $OLDNAME"
>	fi
>	if [ "${DEV_ID//0/}" == ":::::" ] ; then
>		# Workaround for some drivers which don't request their
>		# firmware before beeing set up and don't have a mac address
>		# before firmware was loaded.
>		ip link set up dev $OLDNAME
>		ip link set down dev $OLDNAME
>		# Do we have to wait some time?
>		for i in 0 1 2 3 4 5 6 7 8 9; do
>			get_device_id "$OLDNAME"
>			info_mesg "waiting for a usefull mac address: $DEV_ID"
>			test "${DEV_ID//0/}" != ":::::" && break
>			sleep 1
>		done
>	fi
>	if [ "${DEV_ID//0/}" == ":::::" ] ; then
>		error_exit 5 "all zero mac address for $OLDNAME"
>	fi
>	
>	while ! check_if_name_is_free; do
>		while [ $IFNUM -lt $MAXIFNUM ] ; do
>			: $((IFNUM++))
>			NEWNAME=$NAMEBASE$IFNUM
>			ls /sys/class/net/$NEWNAME 2>/dev/null 1>&2 && continue
>			continue 2
>		done
>		error_exit 6 "could not get a free persistent interfacename" \
>		         "for $OLDNAME ($DEV_ID)"
>	done
>	WRITE_RULE=yes
>	info_mesg "$OLDNAME: new persistent name for $DEV_ID is $NEWNAME"
>fi
>if [ -z "$NEWNAME" ] ; then
>	error_exit 7 "cannot get a valid new interface name"
>fi
>
># Simply try to rename directly, because it will work in most cases
>if nameif -r "$NEWNAME" "$OLDNAME" 2>/dev/null 1>&2; then
>	write_rule || error_exit 8 "Name $NEWNAME for $DEV_ID is NOT" \
>	                       "persistent"
>	info_mesg "$OLDNAME -> $NEWNAME: immediate success"
>	INTERFACE=$NEWNAME
>	exit 0
>fi
>
># Generate a temporary interface name
>TMPNAME="${NAMEBASE}xx${IFNUM}"
>ls /sys/class/net/$TMPNAME 2>/dev/null 1>&2 \
>    && error_exit 10 "temporary interface name $TMPNAME does exist"
>
># Rename it to the temporary name.
># Then try several times to rename it to new name
>nameif -r "$TMPNAME" "$OLDNAME" 2>/dev/null 1>&2 \
>    || error_exit 11 "cannot rename interface to temporary name $TMPNAME"
>echo looping > $STAMPFILE
>declare -i LOOPS=0
>while [ $MAXLOOPS -gt $LOOPS ] ; do
>	: $((LOOPS++))
>	if nameif -r "$NEWNAME" "$TMPNAME" 2>/dev/null 1>&2; then
>		write_rule || error_exit 12 "Name $NEWNAME for $DEV_ID is" \
>		                       "NOT persistent"
>		info_mesg "$OLDNAME -> $NEWNAME: success after $LOOPS loops"
>		INTERFACE=$NEWNAME
>		exit 0
>	fi
>	usleep $LOOPDELAY
>done
>
>if nameif -r "$OLDNAME" "$TMPNAME" 2>/dev/null 1>&2; then
>	info_mesg "$OLDNAME -> $NEWNAME: NO success after $LOOPS loops." \
>	          "Interface again named $OLDNAME"
>else
>	info_mesg "$OLDNAME -> $NEWNAME: NO success after $LOOPS loops." \
>	          "Interface now named $TMPNAME, because $OLDNAME was no" \
>	          "longer available"
>	INTERFACE=$TMPNAME
>fi
>exit 0
>
>
>
>
>
>

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Attachments on bug 230213: 111748 | 114509 | 115398 | 115617 | 116268 | 116273 | 116349 | 116350 | 117195 | 117197 | 117199 | 117200 | 117827 | 117938 | 117939