add persistent rules generator for net devices and optical drives
This commit is contained in:
Marco d'Itri
committed by
Kay Sievers
Kay Sievers
parent
d60fd52af8
commit
fbcbf70bb2
@@ -0,0 +1,3 @@
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# these rules generate rules for the /dev/{cdrom,dvd,...} symlinks
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ACTION=="add", SUBSYSTEM=="block", ENV{ID_CDROM}=="?*", ENV{GENERATED}!="?*", PROGRAM="write_cd_rules", SYMLINK+="%c"
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@@ -0,0 +1,17 @@
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# these rules generate rules for persistent network device naming
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ACTION=="add", SUBSYSTEM=="net", NAME!="?*", DRIVERS=="?*", GOTO="persistent_net_generator_do"
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GOTO="persistent_net_generator_end"
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LABEL="persistent_net_generator_do"
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# export device description to comment the generated rule
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SUBSYSTEMS=="pci", ENV{COMMENT}="PCI Device: $attr{vendor}:$attr{device} ($attr{driver})"
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SUBSYSTEMS=="usb", ENV{COMMENT}="USB Device: 0x$attr{idVendor}:0x$attr{idProduct} ($attr{driver})"
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SUBSYSTEMS=="ieee1394", ENV{COMMENT}="Firewire Device: $attr{host_id} ($attr{driver})"
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SUBSYSTEMS=="xen", ENV{COMMENT}="Xen virtual device"
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KERNEL=="eth*|ath*|wlan*|ra*|sta*", IMPORT{program}="write_net_rules $attr{address}"
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ENV{INTERFACE_NEW}=="?*", NAME="$env{INTERFACE_NEW}"
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LABEL="persistent_net_generator_end"
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@@ -0,0 +1,68 @@
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# Makefile for udev extra invoked from the udev main Makefile
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#
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# Copyright (C) 2004-2006 Kay Sievers <kay.sievers@vrfy.org>
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#
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# Released under the GNU General Public License, version 2.
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#
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PROG =
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MAN_PAGES =
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prefix =
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etcdir = ${prefix}/etc
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sbindir = ${prefix}/sbin
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usrbindir = ${prefix}/usr/bin
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usrsbindir = ${prefix}/usr/sbin
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libudevdir = ${prefix}/lib/udev
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mandir = ${prefix}/usr/share/man
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configdir = ${etcdir}/udev
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INSTALL = /usr/bin/install -c
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INSTALL_PROGRAM = ${INSTALL}
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INSTALL_DATA = ${INSTALL} -m 644
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INSTALL_SCRIPT = ${INSTALL_PROGRAM}
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all: $(PROG) $(MAN_PAGES)
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.PHONY: all
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.DEFAULT: all
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# man pages
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%.8: %.xml
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$(E) " XMLTO " $@
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$(Q) xmlto man $?
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.PRECIOUS: %.8
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clean:
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$(E) " CLEAN "
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.PHONY: clean
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install-bin: all
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$(INSTALL_PROGRAM) -D rule_generator.functions $(DESTDIR)$(libudevdir)/rule_generator.functions
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$(INSTALL_PROGRAM) -D write_cd_rules $(DESTDIR)$(libudevdir)/write_cd_rules
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$(INSTALL_PROGRAM) -D write_net_rules $(DESTDIR)$(libudevdir)/write_net_rules
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$(INSTALL_DATA) -D 75-cd-aliases-generator.rules \
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$(DESTDIR)$(configdir)/rules.d/75-cd-aliases-generator.rules
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$(INSTALL_DATA) -D 75-persistent-net-generator.rules \
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$(DESTDIR)$(configdir)/rules.d/75-persistent-net-generator.rules
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.PHONY: install-bin
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uninstall-bin:
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- rm $(DESTDIR)$(libudevdir)/rule_generator.functions
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- rm $(DESTDIR)$(libudevdir)/write_cd_rules
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- rm $(DESTDIR)$(libudevdir)/write_net_rules
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- rm $(DESTDIR)$(configdir)/rules.d/75-cd-aliases-generator.rules
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- rm $(DESTDIR)$(configdir)/rules.d/75-persistent-net-generator.rules
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.PHONY: uninstall-bin
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install-man:
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@echo "Please create a man page for this tool."
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.PHONY: install-man
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uninstall-man:
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@echo "Please create a man page for this tool."
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.PHONY: uninstall-man
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install-config:
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@echo "no config file to install"
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.PHONY: install-config
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@@ -0,0 +1,98 @@
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# functions used by the udev rule generator
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation version 2 of the License.
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PATH='/sbin:/bin'
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# Read a single line from file $1 in the $DEVPATH directory.
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# The function must not return an error even if the file does not exist.
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sysread() {
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local file="$1"
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[ -e "/sys$DEVPATH/$file" ] || return 0
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local value
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read value < "/sys$DEVPATH/$file" || return 0
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echo "$value"
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}
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sysreadlink() {
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local file="$1"
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[ -e "/sys$DEVPATH/$file" ] || return 0
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readlink -f /sys$DEVPATH/$file 2> /dev/null || true
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}
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# Return true if a directory is writeable.
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writeable() {
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if ln -s test-link $1/.is-writeable 2> /dev/null; then
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rm -f $1/.is-writeable
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return 0
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else
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return 1
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fi
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}
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# Create a lock file for the current rules file.
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lock_rules_file() {
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[ -e /dev/.udev/ ] || return 0
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RULES_LOCK="/dev/.udev/.lock-${RULES_FILE##*/}"
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retry=30
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while ! mkdir $RULES_LOCK 2> /dev/null; do
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if [ $retry -eq 0 ]; then
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echo "Cannot lock $RULES_FILE!" >&2
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exit 2
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fi
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sleep 1
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retry=$(($retry - 1))
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done
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}
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unlock_rules_file() {
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[ "$RULES_LOCK" ] || return 0
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rmdir $RULES_LOCK || true
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}
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# Choose the real rules file if it is writeable or a temporary file if not.
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# Both files should be checked later when looking for existing rules.
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choose_rules_file() {
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local tmp_rules_file="/dev/.udev/tmp-rules--${RULES_FILE##*/}"
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[ -e "$RULES_FILE" -o -e "$tmp_rules_file" ] || PRINT_HEADER=1
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if writeable ${RULES_FILE%/*}; then
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RO_RULES_FILE='/dev/null'
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else
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RO_RULES_FILE=$RULES_FILE
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RULES_FILE=$tmp_rules_file
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fi
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}
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# Return the name of the first free device.
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raw_find_next_available() {
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local links="$1"
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local basename=${links%%[ 0-9]*}
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local max=-1
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for name in $links; do
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local num=${name#$basename}
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[ "$num" ] || num=0
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[ $num -gt $max ] && max=$num
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done
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local max=$(($max + 1))
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# "name0" actually is just "name"
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[ $max -eq 0 ] && return
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echo "$max"
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}
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# Find all rules matching a key (with action) and a pattern.
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find_all_rules() {
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local key="$1"
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local linkre="$2"
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local match="$3"
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[ -e $RULES_FILE ] || return
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local search='.*[[:space:],]'"$key"'"\('"$linkre"'\)"[[:space:]]*\(,.*\|\\\|\)$'
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echo $(sed -n -e "${match}s/${search}/\1/p" $RO_RULES_FILE $RULES_FILE)
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}
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@@ -0,0 +1,78 @@
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#!/bin/sh -e
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# This script is run if an optical drive lacks a rule for persistent naming.
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#
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# It adds symlinks for optical drives based on the device class determined
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# by cdrom_id and used ID_PATH to identify the device.
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#
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# (C) 2006 Marco d'Itri <md@Linux.IT>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation version 2 of the License.
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RULES_FILE="/etc/udev/rules.d/70-persistent-cd.rules"
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. /lib/udev/rule_generator.functions
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find_next_available() {
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raw_find_next_available "$(find_all_rules 'SYMLINK+=' $1)"
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}
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write_rule() {
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local match="$1"
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local link="$2"
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local comment="$3"
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{
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if [ "$PRINT_HEADER" ]; then
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PRINT_HEADER=
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echo "# This file was automatically generated by the $0"
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echo "# program, probably run by the cd-aliases-generator.rules rules file."
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echo "#"
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echo "# You can modify it, as long as you keep each rule on a single line"
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echo "# and set the \$GENERATED variable."
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echo ""
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fi
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[ "$comment" ] && echo "# $comment"
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echo "$match, SYMLINK+=\"$link\", ENV{GENERATED}=\"1\""
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} >> $RULES_FILE
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SYMLINKS="$SYMLINKS $link"
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}
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if [ -z "$DEVPATH" ]; then
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echo "Missing \$DEVPATH." >&2
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exit 1
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fi
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if [ -z "$ID_CDROM" ]; then
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echo "$DEVPATH is not a CD reader." >&2
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exit 1
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fi
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# Prevent concurrent processes from modifying the file at the same time.
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lock_rules_file
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# Check if the rules file is writeable.
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choose_rules_file
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link_num=$(find_next_available 'cdrom[0-9]*')
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match="ENV{ID_CDROM}==\"?*\", ENV{ID_PATH}==\"$ID_PATH\""
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comment="$ID_MODEL ($ID_PATH)"
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write_rule "$match" "cdrom$link_num" "$comment"
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[ "$ID_CDROM_CD_R" -o "$ID_CDROM_CD_RW" ] && \
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write_rule "$match" "cdrw$link_num"
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[ "$ID_CDROM_DVD" ] && \
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write_rule "$match" "dvd$link_num"
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[ "$ID_CDROM_DVD_R" -o "$ID_CDROM_DVD_RW" -o "$ID_CDROM_DVD_RAM" ] && \
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write_rule "$match" "dvdrw$link_num"
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unlock_rules_file
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echo $SYMLINKS
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exit 0
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@@ -0,0 +1,130 @@
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#!/bin/sh -e
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#
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# This script is run if the interface (recognized by its MAC address) lacks
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# a rule for persistent naming.
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#
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# If there is already a persistent rule with that interface name then the
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# current interface needs to be renamed.
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#
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# If the interface needs to be renamed, a NAME=value pair will be printed
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# on stdout to allow udev to IMPORT it. Then a rule for the MAC address and
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# interface name is written.
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#
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# (C) 2006 Marco d'Itri <md@Linux.IT>
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#
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# This program is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License as published by the
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# Free Software Foundation version 2 of the License.
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RULES_FILE='/etc/udev/rules.d/70-persistent-net.rules'
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. /lib/udev/rule_generator.functions
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interface_name_taken() {
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local value="$(find_all_rules 'NAME=' $INTERFACE)"
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if [ "$value" ]; then
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return 0
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else
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return 1
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fi
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}
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find_next_available() {
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raw_find_next_available "$(find_all_rules 'NAME=' "$1")"
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}
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write_rule() {
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local match="$1"
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local name="$2"
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local comment="$3"
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{
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if [ "$PRINT_HEADER" ]; then
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PRINT_HEADER=
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echo "# This file was automatically generated by the $0"
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echo "# program, probably run by the persistent-net-generator.rules rules file."
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echo "#"
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echo "# You can modify it, as long as you keep each rule on a single line."
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fi
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echo ""
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[ "$comment" ] && echo "# $comment"
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echo "SUBSYSTEM==\"net\", $match, NAME=\"$name\""
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} >> $RULES_FILE
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}
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# used only if $RULES_FILE is empty, like on installation
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if [ "$1" = "all_interfaces" ]; then
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if [ -e $RULES_FILE ]; then
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printf "$RULES_FILE exists, persistent interface names\nnot saved.\n" >&2
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exit 0
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fi
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if [ ! -e /sys/class/net/ ]; then
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echo "/sys/class/net/ is not available, persistent interface names not saved." >&2
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exit 0
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fi
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cd /sys/class/net/ || return 0
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for INTERFACE in *; do
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case $INTERFACE in
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eth*|ath*|wlan*|ra*|sta*) ;;
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*) continue ;;
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esac
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INTERFACE="$INTERFACE" DEVPATH="/class/net/$INTERFACE" \
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/lib/udev/write_net_rules || true
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done
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exit 0
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fi
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if [ -z "$INTERFACE" ]; then
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echo "Missing \$INTERFACE." >&2
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exit 1
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fi
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if [ "$1" ]; then
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MAC_ADDR="$1"
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else
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MAC_ADDR=$(sysread address)
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fi
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if [ -z "$MAC_ADDR" ]; then
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echo "No MAC address for $INTERFACE." >&2
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exit 1
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fi
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if [ "$MAC_ADDR" = "00:00:00:00:00:00" ]; then
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echo "NULL MAC address for $INTERFACE." >&2
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exit 1
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fi
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# Prevent concurrent processes from modifying the file at the same time.
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lock_rules_file
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# Check if the rules file is writeable.
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choose_rules_file
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# If a rule using the current name already exists then find a new name and
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# report it to udev which will rename the interface.
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basename=${INTERFACE%%[0-9]*}
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if interface_name_taken; then
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INTERFACE="$basename$(find_next_available "$basename[0-9]*")"
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if [ ! -t 1 ]; then
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echo "INTERFACE_NEW=$INTERFACE"
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fi
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fi
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# the DRIVERS key is needed to not match bridges and VLAN sub-interfaces
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match="DRIVERS==\"?*\", ATTRS{address}==\"$MAC_ADDR\""
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if [ $basename = "ath" -o $basename = "wlan" ]; then
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match="$match, ATTRS{type}==\"1\"" # do not match the wifi* interfaces
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fi
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write_rule "$match" "$INTERFACE" "$COMMENT"
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unlock_rules_file
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exit 0
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@@ -11,7 +11,9 @@ EXTRAS="\
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extras/edd_id \
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extras/floppy \
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extras/run_directory \
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extras/firmware"
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extras/firmware \
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extras/path_id \
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extras/rule_generator"
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# with debug
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make clean EXTRAS="$EXTRAS" >/dev/null
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Reference in New Issue
Block a user