Forward-ported network rule-generator code from eudev-1.10eudev/v3.1.4

4 files changed, 374 insertions, 0 deletions

diff --git a/rule_generator/75-persistent-net-generator.rules b/rule_generator/75-persistent-net-generator.rules
new file mode 100644
index 0000000000..ce59e5d82b
--- /dev/null
+++ b/rule_generator/75-persistent-net-generator.rules
@@ -0,0 +1,100 @@
+# do not edit this file, it will be overwritten on update
+
+# these rules generate rules for persistent network device naming
+#
+# variables used to communicate:
+#   MATCHADDR             MAC address used for the match
+#   MATCHID               bus_id used for the match
+#   MATCHDRV              driver name used for the match
+#   MATCHIFTYPE           interface type match
+#   COMMENT               comment to add to the generated rule
+#   INTERFACE_NAME        requested name supplied by external tool
+#   INTERFACE_NEW         new interface name returned by rule writer
+
+ACTION!="add", GOTO="persistent_net_generator_end"
+SUBSYSTEM!="net", GOTO="persistent_net_generator_end"
+
+# ignore the interface if a name has already been set
+NAME=="?*", GOTO="persistent_net_generator_end"
+
+# device name whitelist
+KERNEL!="eth*|ath*|wlan*[0-9]|msh*|ra*|sta*|ctc*|lcs*|hsi*", GOTO="persistent_net_generator_end"
+
+# ignore Xen virtual interfaces
+SUBSYSTEMS=="xen", GOTO="persistent_net_generator_end"
+
+# read MAC address
+ENV{MATCHADDR}="$attr{address}"
+
+# match interface type
+ENV{MATCHIFTYPE}="$attr{type}"
+
+# ignore KVM virtual interfaces
+ENV{MATCHADDR}=="52:54:00:*", GOTO="persistent_net_generator_end"
+# ignore VMWare virtual interfaces
+ENV{MATCHADDR}=="00:0c:29:*|00:50:56:*", GOTO="persistent_net_generator_end"
+# ignore Hyper-V virtual interfaces
+ENV{MATCHADDR}=="00:15:5d:*", GOTO="persistent_net_generator_end"
+
+# These vendors are known to violate the local MAC address assignment scheme
+# Interlan, DEC (UNIBUS or QBUS), Apollo, Cisco, Racal-Datacom
+ENV{MATCHADDR}=="02:07:01:*", GOTO="globally_administered_whitelist"
+# 3Com
+ENV{MATCHADDR}=="02:60:60:*", GOTO="globally_administered_whitelist"
+# 3Com IBM PC; Imagen; Valid; Cisco; Apple
+ENV{MATCHADDR}=="02:60:8c:*", GOTO="globally_administered_whitelist"
+# Intel
+ENV{MATCHADDR}=="02:a0:c9:*", GOTO="globally_administered_whitelist"
+# Olivetti
+ENV{MATCHADDR}=="02:aa:3c:*", GOTO="globally_administered_whitelist"
+# CMC Masscomp; Silicon Graphics; Prime EXL
+ENV{MATCHADDR}=="02:cf:1f:*", GOTO="globally_administered_whitelist"
+# Prominet Corporation Gigabit Ethernet Switch
+ENV{MATCHADDR}=="02:e0:3b:*", GOTO="globally_administered_whitelist"
+# BTI (Bus-Tech, Inc.) IBM Mainframes
+ENV{MATCHADDR}=="02:e6:d3:*", GOTO="globally_administered_whitelist"
+# Realtek
+ENV{MATCHADDR}=="52:54:00:*", GOTO="globally_administered_whitelist"
+# Novell 2000
+ENV{MATCHADDR}=="52:54:4c:*", GOTO="globally_administered_whitelist"
+# Realtec
+ENV{MATCHADDR}=="52:54:ab:*", GOTO="globally_administered_whitelist"
+# Kingston Technologies
+ENV{MATCHADDR}=="e2:0c:0f:*", GOTO="globally_administered_whitelist"
+
+# match interface dev_id
+ATTR{dev_id}=="?*", ENV{MATCHDEVID}="$attr{dev_id}"
+
+# do not use "locally administered" MAC address
+ENV{MATCHADDR}=="?[2367abef]:*", ENV{MATCHADDR}=""
+
+# do not use empty address
+ENV{MATCHADDR}=="00:00:00:00:00:00", ENV{MATCHADDR}=""
+
+LABEL="globally_administered_whitelist"
+
+# build comment line for generated rule:
+SUBSYSTEMS=="pci", ENV{COMMENT}="PCI device $attr{vendor}:$attr{device} ($driver)"
+SUBSYSTEMS=="usb", ATTRS{idVendor}=="?*", ENV{COMMENT}="USB device 0x$attr{idVendor}:0x$attr{idProduct} ($driver)"
+SUBSYSTEMS=="pcmcia", ENV{COMMENT}="PCMCIA device $attr{card_id}:$attr{manf_id} ($driver)"
+SUBSYSTEMS=="ieee1394", ENV{COMMENT}="Firewire device $attr{host_id})"
+
+# ibmveth likes to use "locally administered" MAC addresses
+DRIVERS=="ibmveth", ENV{MATCHADDR}="$attr{address}", ENV{COMMENT}="ibmveth ($id)"
+
+# S/390 uses id matches only, do not use MAC address match
+SUBSYSTEMS=="ccwgroup", ENV{COMMENT}="S/390 $driver device at $id", ENV{MATCHID}="$id", ENV{MATCHDRV}="$driver", ENV{MATCHADDR}=""
+
+# see if we got enough data to create a rule
+ENV{MATCHADDR}=="", ENV{MATCHID}=="", ENV{INTERFACE_NAME}=="", GOTO="persistent_net_generator_end"
+
+# default comment
+ENV{COMMENT}=="", ENV{COMMENT}="net device ($attr{driver})"
+
+# write rule
+DRIVERS=="?*", IMPORT{program}="write_net_rules"
+
+# rename interface if needed
+ENV{INTERFACE_NEW}=="?*", NAME="$env{INTERFACE_NEW}"
+
+LABEL="persistent_net_generator_end"
diff --git a/rule_generator/Makefile.am b/rule_generator/Makefile.am
new file mode 100644
index 0000000000..8ed69f70eb
--- /dev/null
+++ b/rule_generator/Makefile.am
@@ -0,0 +1,13 @@
+ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
+
+# ------------------------------------------------------------------------------
+# rule_generator - persistent network rule generator
+# ------------------------------------------------------------------------------
+dist_udevlibexec_SCRIPTS = \
+        write_net_rules
+
+udevhomedir = $(udevlibexecdir)
+dist_udevhome_DATA = rule_generator.functions
+
+dist_udevrules_DATA = \
+        75-persistent-net-generator.rules
diff --git a/rule_generator/rule_generator.functions b/rule_generator/rule_generator.functions
new file mode 100644
index 0000000000..ea02acc4c7
--- /dev/null
+++ b/rule_generator/rule_generator.functions
@@ -0,0 +1,120 @@
+# functions used by the udev rule generator
+
+# Copyright (C) 2006 Marco d'Itri <md@Linux.IT>
+
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+PATH='/sbin:/bin'
+#
+
+PATH='/sbin:/bin'
+
+# Read a single line from file $1 in the $DEVPATH directory.
+# The function must not return an error even if the file does not exist.
+sysread() {
+	local file="$1"
+	[ -e "/sys$DEVPATH/$file" ] || return 0
+	local value
+	read value < "/sys$DEVPATH/$file" || return 0
+	echo "$value"
+}
+
+sysreadlink() {
+	local file="$1"
+	[ -e "/sys$DEVPATH/$file" ] || return 0
+	readlink -f /sys$DEVPATH/$file 2> /dev/null || true
+}
+
+# Return true if a directory is writeable.
+writeable() {
+	if ln -s test-link $1/.is-writeable 2> /dev/null; then
+		rm -f $1/.is-writeable
+		return 0
+	else
+		return 1
+	fi
+}
+
+# Create a lock file for the current rules file.
+lock_rules_file() {
+	RUNDIR="/run/udev/"
+
+	RULES_LOCK="$RUNDIR/.lock-${RULES_FILE##*/}"
+
+	retry=30
+	while ! mkdir $RULES_LOCK 2> /dev/null; do
+		if [ $retry -eq 0 ]; then
+			 echo "Cannot lock $RULES_FILE!" >&2
+			 exit 2
+		fi
+		sleep 1
+		retry=$(($retry - 1))
+	done
+}
+
+unlock_rules_file() {
+	[ "$RULES_LOCK" ] || return 0
+	rmdir $RULES_LOCK || true
+}
+
+# Choose the real rules file if it is writeable or a temporary file if not.
+# Both files should be checked later when looking for existing rules.
+choose_rules_file() {
+	RUNDIR="/run/udev/"
+
+	local tmp_rules_file="$RUNDIR/tmp-rules--${RULES_FILE##*/}"
+	[ -e "$RULES_FILE" -o -e "$tmp_rules_file" ] || PRINT_HEADER=1
+
+	[ -d "${RULES_FILE%/*}" ] || if writeable ${RULES_FILE%/rules.d/*}; then
+		mkdir -p "${RULES_FILE%/*}"
+	fi
+
+	if writeable ${RULES_FILE%/*}; then
+		RO_RULES_FILE='/dev/null'
+	else
+		RO_RULES_FILE=$RULES_FILE
+		RULES_FILE=$tmp_rules_file
+	fi
+}
+
+# Return the name of the first free device.
+raw_find_next_available() {
+	local links="$1"
+
+	local basename=${links%%[ 0-9]*}
+	local max=-1
+	for name in $links; do
+		local num=${name#$basename}
+		[ "$num" ] || num=0
+		[ $num -gt $max ] && max=$num
+	done
+
+	local max=$(($max + 1))
+	# "name0" actually is just "name"
+	[ $max -eq 0 ] && return
+	echo "$max"
+}
+
+# Find all rules matching a key (with action) and a pattern.
+find_all_rules() {
+	local key="$1"
+	local linkre="$2"
+	local match="$3"
+
+	local search='.*[[:space:],]'"$key"'"('"$linkre"')".*'
+	echo $(sed -n -r -e 's/^#.*//' -e "${match}s/${search}/\1/p" \
+		$RO_RULES_FILE \
+		$([ -e $RULES_FILE ] && echo $RULES_FILE) \
+		2>/dev/null)
+}
diff --git a/rule_generator/write_net_rules.in b/rule_generator/write_net_rules.in
new file mode 100644
index 0000000000..324e97821c
--- /dev/null
+++ b/rule_generator/write_net_rules.in
@@ -0,0 +1,141 @@
+#!/bin/sh -e
+
+# This script is run to create persistent network device naming rules
+# based on properties of the device.
+# If the interface needs to be renamed, INTERFACE_NEW=<name> will be printed
+# on stdout to allow udev to IMPORT it.
+
+# variables used to communicate:
+#   MATCHADDR             MAC address used for the match
+#   MATCHID               bus_id used for the match
+#   MATCHDEVID            dev_id used for the match
+#   MATCHDRV              driver name used for the match
+#   MATCHIFTYPE           interface type match
+#   COMMENT               comment to add to the generated rule
+#   INTERFACE_NAME        requested name supplied by external tool
+#   INTERFACE_NEW         new interface name returned by rule writer
+
+# Copyright (C) 2006 Marco d'Itri <md@Linux.IT>
+# Copyright (C) 2007 Kay Sievers <kay.sievers@vrfy.org>
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# debug, if UDEV_LOG=<debug>
+if [ -n "$UDEV_LOG" ]; then
+	if [ "$UDEV_LOG" -ge 7 ]; then
+		set -x
+	fi
+fi
+
+RULES_FILE='@udevconfdir@/rules.d/70-persistent-net.rules'
+
+. @udevlibexecdir@/rule_generator.functions
+
+interface_name_taken() {
+	local value="$(find_all_rules 'NAME=' $INTERFACE)"
+	if [ "$value" ]; then
+		return 0
+	else
+		return 1
+	fi
+}
+
+find_next_available() {
+	raw_find_next_available "$(find_all_rules 'NAME=' "$1")"
+}
+
+write_rule() {
+	local match="$1"
+	local name="$2"
+	local comment="$3"
+
+	{
+	if [ "$PRINT_HEADER" ]; then
+		PRINT_HEADER=
+		echo "# This file was automatically generated by the $0"
+		echo "# program, run by the persistent-net-generator.rules rules file."
+		echo "#"
+		echo "# You can modify it, as long as you keep each rule on a single"
+		echo "# line, and change only the value of the NAME= key."
+	fi
+
+	echo ""
+	[ "$comment" ] && echo "# $comment"
+	echo "SUBSYSTEM==\"net\", ACTION==\"add\"$match, NAME=\"$name\""
+	} >> $RULES_FILE
+}
+
+if [ -z "$INTERFACE" ]; then
+	echo "missing \$INTERFACE" >&2
+	exit 1
+fi
+
+# Prevent concurrent processes from modifying the file at the same time.
+lock_rules_file
+
+# Check if the rules file is writeable.
+choose_rules_file
+
+# the DRIVERS key is needed to not match bridges and VLAN sub-interfaces
+if [ "$MATCHADDR" ]; then
+	match="$match, DRIVERS==\"?*\", ATTR{address}==\"$MATCHADDR\""
+fi
+
+if [ "$MATCHDRV" ]; then
+	match="$match, DRIVERS==\"$MATCHDRV\""
+fi
+
+if [ "$MATCHDEVID" ]; then
+	match="$match, ATTR{dev_id}==\"$MATCHDEVID\""
+fi
+
+if [ "$MATCHID" ]; then
+	match="$match, KERNELS==\"$MATCHID\""
+fi
+
+if [ "$MATCHIFTYPE" ]; then
+	match="$match, ATTR{type}==\"$MATCHIFTYPE\""
+fi
+
+if [ -z "$match" ]; then
+	echo "missing valid match" >&2
+	unlock_rules_file
+	exit 1
+fi
+
+basename=${INTERFACE%%[0-9]*}
+match="$match, KERNEL==\"$basename*\""
+
+if [ "$INTERFACE_NAME" ]; then
+	# external tools may request a custom name
+	COMMENT="$COMMENT (custom name provided by external tool)"
+	if [ "$INTERFACE_NAME" != "$INTERFACE" ]; then
+		INTERFACE=$INTERFACE_NAME;
+		echo "INTERFACE_NEW=$INTERFACE"
+	fi
+else
+	# if a rule using the current name already exists, find a new name
+	if interface_name_taken; then
+		INTERFACE="$basename$(find_next_available "$basename[0-9]*")"
+		# prevent INTERFACE from being "eth" instead of "eth0"
+		[ "$INTERFACE" = "${INTERFACE%%[ \[\]0-9]*}" ] && INTERFACE=${INTERFACE}0
+		echo "INTERFACE_NEW=$INTERFACE"
+	fi
+fi
+
+write_rule "$match" "$INTERFACE" "$COMMENT"
+
+unlock_rules_file
+
+exit 0