eudev: Replaces udev with eudev for compatibility when using sysvinit on newer kernels

udev has started to fail on new kernels (4.4), due to being deprecated in favor
of systemd's udev implementation. To maintain a sysvinit alternative we also
need to provide an alternative to udev. Eudev is a fork of systemds udev,
this new eudev recipe provides upstream udev 220 funcitonality.

  - Removes patches that dont apply anymore
  - ToDo: eudev-ptest?

[YOCTO #8998]

(From OE-Core rev: a22797f7c37a865420837b5c29b270f73ee4c6ce)

Signed-off-by: Alejandro Hernandez <alejandro.hernandez@linux.intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

9 files changed, 631 insertions, 0 deletions

diff --git a/meta/recipes-core/udev/eudev/devfs-udev.rules b/meta/recipes-core/udev/eudev/devfs-udev.rules
new file mode 100644
index 0000000000..0ba1ad4e7f
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/devfs-udev.rules
@@ -0,0 +1,108 @@
+# The use of these rules is not recommended or supported.
+# In a world where devices can come and go at any time, the devfs scheme
+# of simple device enumeration does not help _anything_. Just forget about
+# it. Use custom rules to name your device or look at the persistent device
+# naming scheme, which is implemented for disks and add your subsystem.
+
+# ide block devices
+BUS="ide", KERNEL="hd*", PROGRAM="/etc/udev/ide-devfs.sh %k %b %n", NAME="%k", SYMLINK="%c{1} %c{2}"
+
+# md block devices
+KERNEL="md[0-9]*", NAME="md/%n"
+
+# floppy devices
+KERNEL="fd[0-9]*", NAME="floppy/%n"
+
+# tty devices
+KERNEL="tty[0-9]*",    NAME="vc/%n", SYMLINK="%k"
+KERNEL="ttyS[0-9]*",   NAME="tts/%n", SYMLINK="%k"
+KERNEL="ttyUSB[0-9]*", NAME="tts/USB%n"
+
+# vc devices
+KERNEL="vcs",        NAME="vcc/0"
+KERNEL="vcs[0-9]*",  NAME="vcc/%n"
+KERNEL="vcsa",       NAME="vcc/a0"
+KERNEL="vcsa[0-9]*", NAME="vcc/a%n"
+
+# v4l devices
+KERNEL="video[0-9]*", NAME="v4l/video%n"
+KERNEL="radio[0-9]*", NAME="v4l/radio%n"
+KERNEL="vbi[0-9]*",   NAME="v4l/vbi%n"
+KERNEL="vtx[0-9]*",   NAME="v4l/vtx%n"
+
+# dm devices (ignore them)
+KERNEL="dm-[0-9]*", NAME=""
+
+# i2c devices
+KERNEL="i2c-[0-9]*", NAME="i2c/%n", SYMLINK="%k"
+
+# loop devices
+KERNEL="loop[0-9]*", NAME="loop/%n", SYMLINK="%k"
+
+# ramdisks
+KERNEL="ram[0-9]*", NAME="rd/%n", SYMLINK="%k"
+
+# framebuffer devices
+KERNEL="fb[0-9]*", NAME="fb/%n", SYMLINK="%k"
+
+# misc
+KERNEL="rtc",     NAME="misc/%k", SYMLINK="%k"
+KERNEL="psaux",   NAME="misc/%k", SYMLINK="%k"
+KERNEL="agpgart", NAME="misc/%k", SYMLINK="%k"
+KERNEL="rtc",     NAME="misc/%k", SYMLINK="%k"
+KERNEL="psaux",   NAME="misc/%k", SYMLINK="%k"
+KERNEL="uinput",  NAME="misc/%k", SYMLINK="%k"
+
+# alsa devices
+KERNEL="controlC[0-9]*", NAME="snd/%k"
+KERNEL="hw[CD0-9]*",     NAME="snd/%k"
+KERNEL="pcm[CD0-9cp]*",  NAME="snd/%k"
+KERNEL="midi[CD0-9]*",   NAME="snd/%k"
+KERNEL="timer",          NAME="snd/%k"
+KERNEL="seq",            NAME="snd/%k"
+
+# oss devices
+KERNEL="audio*",     NAME="sound/%k", SYMLINK="%k"
+KERNEL="dmmidi",     NAME="sound/%k", SYMLINK="%k"
+KERNEL="dsp*",       NAME="sound/%k", SYMLINK="%k"
+KERNEL="midi*",      NAME="sound/%k", SYMLINK="%k"
+KERNEL="mixer*",     NAME="sound/%k", SYMLINK="%k"
+KERNEL="sequencer*", NAME="sound/%k", SYMLINK="%k"
+
+# input devices
+KERNEL="mice",   NAME="input/%k"
+KERNEL="mouse*", NAME="input/%k"
+KERNEL="event*", NAME="input/%k"
+KERNEL="js*",    NAME="input/%k"
+KERNEL="ts*",    NAME="input/%k"
+
+# USB devices
+KERNEL="hiddev*",       NAME="usb/%k"
+KERNEL="auer*",         NAME="usb/%k"
+KERNEL="legousbtower*", NAME="usb/%k"
+KERNEL="dabusb*",       NAME="usb/%k"
+BUS="usb", KERNEL="lp[0-9]*",   NAME="usb/%k"
+
+# netlink devices
+KERNEL="route",         NAME="netlink/%k"
+KERNEL="skip",          NAME="netlink/%k"
+KERNEL="usersock",      NAME="netlink/%k"
+KERNEL="fwmonitor",     NAME="netlink/%k"
+KERNEL="tcpdiag",       NAME="netlink/%k"
+KERNEL="nflog",         NAME="netlink/%k"
+KERNEL="xfrm",          NAME="netlink/%k"
+KERNEL="arpd",          NAME="netlink/%k"
+KERNEL="route6",        NAME="netlink/%k"
+KERNEL="ip6_fw",        NAME="netlink/%k"
+KERNEL="dnrtmsg",       NAME="netlink/%k"
+KERNEL="tap*",          NAME="netlink/%k"
+
+# CAPI devices
+KERNEL="capi",          NAME="capi20", SYMLINK="isdn/capi20"
+KERNEL="capi*",         NAME="capi/%n"
+
+# Network devices
+KERNEL="tun",           NAME="net/%k"
+
+# raw devices
+KERNEL="raw[0-9]*",     NAME="raw/%k" 
diff --git a/meta/recipes-core/udev/eudev/init b/meta/recipes-core/udev/eudev/init
new file mode 100644
index 0000000000..0ab028b391
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/init
@@ -0,0 +1,142 @@
+#!/bin/sh
+
+### BEGIN INIT INFO
+# Provides:          udev
+# Required-Start:    mountvirtfs
+# Required-Stop:     
+# Default-Start:     S
+# Default-Stop:
+# Short-Description: Start udevd, populate /dev and load drivers.
+### END INIT INFO
+
+export TZ=/etc/localtime
+
+[ -d /sys/class ] || exit 1
+[ -r /proc/mounts ] || exit 1
+[ -x @UDEVD@ ] || exit 1
+SYSCONF_CACHED="/etc/udev/cache.data"
+SYSCONF_TMP="/dev/shm/udev.cache"
+DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen
+
+# A list of files which are used as a criteria to judge whether the udev cache could be reused.
+CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
+[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
+
+# List of files whose metadata (size/mtime/name) will be included in cached
+# system state.
+META_FILE_LIST="lib/udev/rules.d/* etc/udev/rules.d/*"
+
+# Command to compute system configuration.
+sysconf_cmd () {
+        cat -- $CMP_FILE_LIST
+        stat -c '%s %Y %n' -- $META_FILE_LIST | awk -F/ '{print $1 " " $NF;}'
+}
+
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
+[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+
+kill_udevd () {
+    pid=`pidof -x udevd`
+    [ -n "$pid" ] && kill $pid
+}
+
+case "$1" in
+  start)
+    export ACTION=add
+    # propagate /dev from /sys
+    echo "Starting udev"
+
+    # Check for requireed devtmpfs before trying to start udev and
+    # mount a no-existant fs.
+    if ! grep -q devtmpfs /proc/filesystems
+    then
+        echo "Missing devtmpfs, which is required for udev to run";
+        echo "Halting..."
+        halt
+    fi
+    # mount the devtmpfs on /dev, if not already done
+    LANG=C awk '$2 == "/dev" && ($3 == "devtmpfs") { exit 1 }' /proc/mounts && {
+            mount -n -o mode=0755 -t devtmpfs none "/dev"
+    }
+    [ -e /dev/pts ] || mkdir -m 0755 /dev/pts
+    [ -e /dev/shm ] || mkdir -m 1777 /dev/shm
+    # the automount rule for udev needs /tmp directory available, as /tmp is a symlink
+    # to /var/tmp which in turn is a symlink to /var/volatile/tmp, we need to make sure
+    # /var/volatile/tmp directory to be available.
+    mkdir -m 1777 -p /var/volatile/tmp
+
+    # Cache handling.
+    if [ "$DEVCACHE" != "" ]; then
+            if [ -e $DEVCACHE ]; then
+                    sysconf_cmd > "$SYSCONF_TMP"
+                    if cmp $SYSCONF_CACHED $SYSCONF_TMP >/dev/null; then
+                            tar xmf $DEVCACHE -C / -m
+                            not_first_boot=1
+                            [ "$VERBOSE" != "no" ] && echo "udev: using cache file $DEVCACHE"
+                            [ -e $SYSCONF_TMP ] && rm -f "$SYSCONF_TMP"
+                            [ -e "$DEVCACHE_REGEN" ] && rm -f "$DEVCACHE_REGEN"
+                    else
+                            # Output detailed reason why the cached /dev is not used
+                            cat <<EOF
+udev: Not using udev cache because of changes detected in the following files:
+udev:     $CMP_FILE_LIST
+udev:     $META_FILE_LIST
+udev: The udev cache will be regenerated. To identify the detected changes,
+udev: compare the cached sysconf at   $SYSCONF_CACHED
+udev: against the current sysconf at  $SYSCONF_TMP
+EOF
+                            touch "$DEVCACHE_REGEN"
+                    fi
+            else
+                    if [ "$ROOTFS_READ_ONLY" != "yes" ]; then
+                            # If rootfs is not read-only, it's possible that a new udev cache would be generated;
+                            # otherwise, we do not bother to read files.
+                            touch "$DEVCACHE_REGEN"
+                    fi
+            fi
+    fi
+
+    # make_extra_nodes
+    kill_udevd > "/dev/null" 2>&1
+
+    # trigger the sorted events
+    [ -e /proc/sys/kernel/hotplug ] && echo -e '\000' >/proc/sys/kernel/hotplug
+    @UDEVD@ -d
+
+    udevadm control --env=STARTUP=1
+    if [ "$not_first_boot" != "" ];then
+            if [ "$PROBE_PLATFORM_BUS" != "yes" ]; then
+                PLATFORM_BUS_NOMATCH="--subsystem-nomatch=platform"
+            else
+                PLATFORM_BUS_NOMATCH=""
+            fi
+            udevadm trigger --action=add --subsystem-nomatch=tty --subsystem-nomatch=mem --subsystem-nomatch=vc --subsystem-nomatch=vtconsole --subsystem-nomatch=misc --subsystem-nomatch=dcon --subsystem-nomatch=pci_bus --subsystem-nomatch=graphics --subsystem-nomatch=backlight --subsystem-nomatch=video4linux $PLATFORM_BUS_NOMATCH
+            (udevadm settle --timeout=3; udevadm control --env=STARTUP=)&
+    else
+            udevadm trigger --action=add
+            udevadm settle
+    fi
+    ;;
+  stop)
+    echo "Stopping udevd"
+    start-stop-daemon --stop --name udevd --quiet
+    ;;
+  restart)
+    $0 stop
+    sleep 1
+    $0 start
+    ;;
+  status)
+    pid=`pidof -x udevd`
+    if [ -n "$pid" ]; then
+        echo "udevd (pid $pid) is running ..."
+    else
+        echo "udevd is stopped"
+    fi
+    ;;
+  *)
+    echo "Usage: $0 {start|stop|status|restart}"
+    exit 1
+esac
+exit 0
diff --git a/meta/recipes-core/udev/eudev/links.conf b/meta/recipes-core/udev/eudev/links.conf
new file mode 100644
index 0000000000..8fff922db6
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/links.conf
@@ -0,0 +1,21 @@
+# This file does not exist. Please do not ask the debian maintainer about it.
+# You may use it to do strange and wonderful things, at your risk.
+
+L fd            /proc/self/fd
+L stdin         /proc/self/fd/0
+L stdout        /proc/self/fd/1
+L stderr        /proc/self/fd/2
+L core          /proc/kcore
+L sndstat       /proc/asound/oss/sndstat
+L MAKEDEV       /sbin/MAKEDEV
+
+D pts
+D shm
+
+# Hic sunt leones.
+M ppp           c 108 0
+D loop
+M loop/0        b 7 0
+D net
+M net/tun       c 10 200
+
diff --git a/meta/recipes-core/udev/eudev/local.rules b/meta/recipes-core/udev/eudev/local.rules
new file mode 100644
index 0000000000..d502cdd6ba
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/local.rules
@@ -0,0 +1,19 @@
+# There are a number of modifiers that are allowed to be used in some
+# of the different fields. They provide the following subsitutions:
+#
+# %n the "kernel number" of the device.
+#    For example, 'sda3' has a "kernel number" of '3'
+# %e the smallest number for that name which does not matches an existing node
+# %k the kernel name for the device
+# %M the kernel major number for the device
+# %m the kernel minor number for the device
+# %b the bus id for the device
+# %c the string returned by the PROGRAM
+# %s{filename} the content of a sysfs attribute
+# %% the '%' char itself
+#
+
+# Create a symlink to any touchscreen input device
+# Trigger based on input type, that the evbit (-e) has EV_SYN and EV_ABS,
+# has an EV_ABS value (-a) which is used for touchscreen type devices.
+SUBSYSTEM=="input", KERNEL=="event[0-9]*", ENV{ID_INPUT_TOUCHSCREEN}=="1", SYMLINK+="input/touchscreen0"
diff --git a/meta/recipes-core/udev/eudev/permissions.rules b/meta/recipes-core/udev/eudev/permissions.rules
new file mode 100644
index 0000000000..205b733292
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/permissions.rules
@@ -0,0 +1,131 @@
+ACTION!="add", GOTO="permissions_end"
+
+# workarounds needed to synchronize with sysfs
+# only needed for kernels < v2.6.18-rc1
+ENV{PHYSDEVPATH}!="?*", ENV{PHYSDEVBUS}=="?*",  WAIT_FOR_SYSFS="bus"
+SUBSYSTEM=="scsi", KERNEL=="[0-9]*:[0-9]*",     WAIT_FOR_SYSFS="ioerr_cnt"
+# only needed for kernels < 2.6.16
+SUBSYSTEM=="net",                               WAIT_FOR_SYSFS="address"
+# only needed for kernels < 2.6.17
+SUBSYSTEM=="net", ENV{DRIVER}=="?*",            WAIT_FOR_SYSFS="device/driver"
+
+# devices needed to load the drivers providing them
+KERNEL=="tun",                                  OPTIONS+="ignore_remove"
+KERNEL=="ppp",                                  OPTIONS+="ignore_remove"
+KERNEL=="loop[0-9]*",                           OPTIONS+="ignore_remove"
+
+# default permissions for block devices
+SUBSYSTEM=="block",                             GROUP="disk"
+# the aacraid driver is broken and reports that disks removable (see #404927)
+SUBSYSTEM=="block", ATTRS{removable}=="1", \
+        DRIVERS!="aacraid",                     GROUP="floppy"
+# all block devices on these buses are "removable"
+SUBSYSTEM=="block", SUBSYSTEMS=="usb|ieee1394|mmc|pcmcia", GROUP="floppy"
+
+# IDE devices
+KERNEL=="hd[a-z]|pcd[0-9]*",                    DRIVERS=="ide-cdrom|pcd", \
+        IMPORT{program}="cdrom_id --export $tempnode"
+ENV{ID_CDROM}=="?*",                            GROUP="cdrom"
+KERNEL=="ht[0-9]*",                             GROUP="tape"
+KERNEL=="nht[0-9]*",                            GROUP="tape"
+
+# SCSI devices
+KERNEL=="sr[0-9]*", IMPORT{program}="cdrom_id --export $tempnode"
+SUBSYSTEMS=="scsi", ATTRS{type}=="1",                           GROUP="tape"
+SUBSYSTEMS=="scsi", ATTRS{type}=="3", ATTRS{vendor}=="HP",      GROUP="scanner"
+SUBSYSTEMS=="scsi", ATTRS{type}=="3", ATTRS{vendor}=="Epson",   GROUP="scanner"
+SUBSYSTEMS=="scsi", ATTRS{type}=="3", ATTRS{vendor}=="EPSON",   GROUP="scanner"
+SUBSYSTEMS=="scsi", ATTRS{type}=="4",                           GROUP="cdrom"
+SUBSYSTEMS=="scsi", ATTRS{type}=="5",                           GROUP="cdrom"
+SUBSYSTEMS=="scsi", ATTRS{type}=="6",                           GROUP="scanner"
+SUBSYSTEMS=="scsi", ATTRS{type}=="8",                           GROUP="tape"
+
+# USB devices
+KERNEL=="legousbtower*",        MODE="0666"
+KERNEL=="lp[0-9]*", SUBSYSTEMS=="usb",          GROUP="lp"
+
+# usbfs-like devices
+SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device", \
+                                MODE="0664"
+
+# iRiver music players
+SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device",   GROUP="plugdev", \
+        ATTRS{idVendor}=="4102", ATTRS{idProduct}=="10[01][135789]"
+
+# serial devices
+SUBSYSTEM=="tty",                               GROUP="dialout"
+SUBSYSTEM=="capi",                              GROUP="dialout"
+SUBSYSTEM=="slamr",                             GROUP="dialout"
+SUBSYSTEM=="zaptel",                            GROUP="dialout"
+
+# vc devices (all members of the tty subsystem)
+KERNEL=="ptmx",                 MODE="0666",    GROUP="root"
+KERNEL=="console",              MODE="0600",    GROUP="root"
+KERNEL=="tty",                  MODE="0666",    GROUP="root"
+KERNEL=="tty[0-9]*",                            GROUP="root"
+KERNEL=="pty*",                 MODE="0666",    GROUP="tty"
+
+# video devices
+SUBSYSTEM=="video4linux",                       GROUP="video"
+SUBSYSTEM=="drm",                               GROUP="video"
+SUBSYSTEM=="dvb",                               GROUP="video"
+SUBSYSTEM=="em8300",                            GROUP="video"
+SUBSYSTEM=="graphics",                          GROUP="video"
+SUBSYSTEM=="nvidia",                            GROUP="video"
+
+# misc devices
+KERNEL=="random",               MODE="0666"
+KERNEL=="urandom",              MODE="0666"
+KERNEL=="mem",                  MODE="0640",    GROUP="kmem"
+KERNEL=="kmem",                 MODE="0640",    GROUP="kmem"
+KERNEL=="port",                 MODE="0640",    GROUP="kmem"
+KERNEL=="full",                 MODE="0666"
+KERNEL=="null",                 MODE="0666"
+KERNEL=="zero",                 MODE="0666"
+KERNEL=="inotify",              MODE="0666"
+KERNEL=="sgi_fetchop",          MODE="0666"
+KERNEL=="sonypi",               MODE="0666"
+KERNEL=="agpgart",                              GROUP="video"
+KERNEL=="nvram",                                GROUP="nvram"
+KERNEL=="rtc|rtc[0-9]*",                        GROUP="audio"
+KERNEL=="tpm*",                 MODE="0600",    OWNER="tss", GROUP="tss"
+KERNEL=="fuse",                                 GROUP="fuse"
+KERNEL=="kqemu",                MODE="0666"
+KERNEL=="kvm",                                  GROUP="kvm"
+KERNEL=="tun",                  MODE="0666",
+
+KERNEL=="cdemu[0-9]*",                          GROUP="cdrom"
+KERNEL=="pktcdvd[0-9]*",                        GROUP="cdrom"
+KERNEL=="pktcdvd",              MODE="0644"
+
+KERNEL=="uverbs*",                              GROUP="rdma"
+KERNEL=="ucm*",                                 GROUP="rdma"
+KERNEL=="rdma_ucm",                             GROUP="rdma"
+
+# printers and parallel devices
+SUBSYSTEM=="printer",                           GROUP="lp"
+SUBSYSTEM=="ppdev",                             GROUP="lp"
+KERNEL=="irlpt*",                               GROUP="lp"
+KERNEL=="pt[0-9]*",                             GROUP="tape"
+KERNEL=="pht[0-9]*",                            GROUP="tape"
+
+# sound devices
+SUBSYSTEM=="sound",                             GROUP="audio"
+
+# ieee1394 devices       
+KERNEL=="raw1394",                              GROUP="disk"
+KERNEL=="dv1394*",                              GROUP="video"
+KERNEL=="video1394*",                           GROUP="video"
+
+# input devices
+KERNEL=="event[0-9]*", ATTRS{name}=="*dvb*|*DVB*|* IR *" \
+                                MODE="0664",    GROUP="video"
+KERNEL=="js[0-9]*",             MODE="0664"
+KERNEL=="lirc[0-9]*",                           GROUP="video"
+
+# AOE character devices
+SUBSYSTEM=="aoe",               MODE="0220",    GROUP="disk"
+SUBSYSTEM=="aoe", KERNEL=="err", MODE="0440"
+
+LABEL="permissions_end"
+
diff --git a/meta/recipes-core/udev/eudev/run.rules b/meta/recipes-core/udev/eudev/run.rules
new file mode 100644
index 0000000000..75d71375bb
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/run.rules
@@ -0,0 +1,14 @@
+# debugging monitor
+RUN+="socket:/org/kernel/udev/monitor"
+
+# run a command on remove events
+ACTION=="remove", ENV{REMOVE_CMD}!="", RUN+="$env{REMOVE_CMD}"
+
+# ignore the events generated by virtual consoles
+KERNEL=="ptmx",         OPTIONS+="last_rule"
+KERNEL=="console",      OPTIONS+="last_rule"
+KERNEL=="tty"   ,       OPTIONS+="last_rule"
+KERNEL=="tty[0-9]*",    OPTIONS+="last_rule"
+KERNEL=="pty*",         OPTIONS+="last_rule"
+SUBSYSTEM=="vc",        OPTIONS+="last_rule"
+
diff --git a/meta/recipes-core/udev/eudev/udev-cache b/meta/recipes-core/udev/eudev/udev-cache
new file mode 100644
index 0000000000..dcfff1cb45
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/udev-cache
@@ -0,0 +1,75 @@
+#!/bin/sh -e
+
+### BEGIN INIT INFO
+# Provides:          udev-cache
+# Required-Start:    mountall
+# Required-Stop:
+# Default-Start:     S
+# Default-Stop:
+# Short-Description: cache /dev to speedup the udev next boot
+### END INIT INFO
+
+export TZ=/etc/localtime
+
+[ -r /proc/mounts ] || exit 1
+[ -x @UDEVD@ ] || exit 1
+[ -d /sys/class ] || exit 1
+
+[ -f /etc/default/rcS ] && . /etc/default/rcS
+DEVCACHE_TMP="/dev/shm/udev-cache-tmp.tar"
+SYSCONF_CACHED="/etc/udev/cache.data"
+SYSCONF_TMP="/dev/shm/udev.cache"
+DEVCACHE_REGEN="/dev/shm/udev-regen" # create to request cache regen
+
+# A list of files which are used as a criteria to judge whether the udev cache could be reused.
+CMP_FILE_LIST="/proc/version /proc/cmdline /proc/devices"
+[ -f /proc/atags ] && CMP_FILE_LIST="$CMP_FILE_LIST /proc/atags"
+
+# List of files whose metadata (size/mtime/name) will be included in cached
+# system state.
+META_FILE_LIST="lib/udev/rules.d/* etc/udev/rules.d/*"
+
+# Command to compute system configuration.
+sysconf_cmd () {
+        cat -- $CMP_FILE_LIST
+        stat -c '%s %Y %n' -- $META_FILE_LIST | awk -F/ '{print $1 " " $NF;}'
+}
+
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
+
+if [ "$ROOTFS_READ_ONLY" = "yes" ]; then
+    [ "$VERBOSE" != "no" ] && echo "udev-cache: read-only rootfs, skip generating udev-cache"
+    exit 0
+fi
+
+[ "$DEVCACHE" != "" ] || exit 0
+[ "${VERBOSE}" == "no" ] || echo -n "udev-cache: checking for ${DEVCACHE_REGEN}... "
+if ! [ -e "$DEVCACHE_REGEN" ]; then
+        [ "${VERBOSE}" == "no" ] || echo "not found."
+        exit 0
+fi
+[ "${VERBOSE}" == "no" ] || echo "found."
+echo "Populating dev cache"
+
+err_cleanup () {
+        echo "udev-cache: update failed!"
+        udevadm control --start-exec-queue
+        rm -f -- "$SYSCONF_TMP" "$DEVCACHE_TMP" "$DEVCACHE" "$SYSCONF_CACHED"
+}
+
+(
+        set -e
+        trap 'err_cleanup' EXIT
+        udevadm control --stop-exec-queue
+        sysconf_cmd > "$SYSCONF_TMP"
+        find /dev -xdev \( -type b -o -type c -o -type l \) | cut -c 2- \
+                | xargs tar cf "${DEVCACHE_TMP}"
+        gzip < "${DEVCACHE_TMP}" > "$DEVCACHE"
+        rm -f "${DEVCACHE_TMP}"
+        mv "$SYSCONF_TMP" "$SYSCONF_CACHED"
+        udevadm control --start-exec-queue
+        rm -f "$DEVCACHE_REGEN"
+        trap - EXIT
+) &
+
+exit 0
diff --git a/meta/recipes-core/udev/eudev/udev-cache.default b/meta/recipes-core/udev/eudev/udev-cache.default
new file mode 100644
index 0000000000..a3b732698d
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/udev-cache.default
@@ -0,0 +1,5 @@
+# Default for /etc/init.d/udev
+
+# Comment this out to disable device cache
+DEVCACHE="/etc/udev-cache.tar.gz"
+PROBE_PLATFORM_BUS="yes"
diff --git a/meta/recipes-core/udev/eudev/udev.rules b/meta/recipes-core/udev/eudev/udev.rules
new file mode 100644
index 0000000000..a19d4a0bf6
--- /dev/null
+++ b/meta/recipes-core/udev/eudev/udev.rules
@@ -0,0 +1,116 @@
+# There are a number of modifiers that are allowed to be used in some
+# of the different fields. They provide the following subsitutions:
+#
+# %n the "kernel number" of the device.
+#    For example, 'sda3' has a "kernel number" of '3'
+# %e the smallest number for that name which does not matches an existing node
+# %k the kernel name for the device
+# %M the kernel major number for the device
+# %m the kernel minor number for the device
+# %b the bus id for the device
+# %c the string returned by the PROGRAM
+# %s{filename} the content of a sysfs attribute
+# %% the '%' char itself
+#
+
+# workaround for devices which do not report media changes
+SUBSYSTEMS=="ide", KERNEL=="hd[a-z]", ATTR{removable}=="1", \
+        ENV{ID_MODEL}=="IOMEGA_ZIP*",   NAME="%k", OPTIONS+="all_partitions"
+SUBSYSTEMS=="ide", KERNEL=="hd[a-z]", ATTRS{media}=="floppy", \
+        OPTIONS+="all_partitions"
+
+# SCSI devices
+SUBSYSTEMS=="scsi", KERNEL=="sr[0-9]*", NAME="scd%n", SYMLINK+="sr%n"
+
+# USB devices
+SUBSYSTEMS=="usb", KERNEL=="auer[0-9]*",        NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="cpad[0-9]*",        NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="dabusb*",           NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="hiddev*",           NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="legousbtower*",     NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="lp[0-9]*",          NAME="usb/%k"
+SUBSYSTEMS=="usb", KERNEL=="ttyUSB*", \
+        ATTRS{product}=="Palm Handheld*|Handspring Visor|palmOne Handheld", \
+                                        SYMLINK+="pilot"
+
+# usbfs-like devices
+SUBSYSTEM=="usb_device",        PROGRAM="/bin/sh -c 'K=%k; K=$${K#usbdev}; printf bus/usb/%%03i/%%03i $${K%%%%.*} $${K#*.}'", ACTION=="add", \
+                                NAME="%c"
+SUBSYSTEM=="usb", ENV{DEVTYPE}=="usb_device",   NAME="bus/usb/$env{BUSNUM}/$env{DEVNUM}"
+
+# serial devices
+KERNEL=="capi",                 NAME="capi20", SYMLINK+="isdn/capi20"
+KERNEL=="capi[0-9]*",           NAME="capi/%n"
+
+# video devices
+KERNEL=="dvb*",                 PROGRAM="/bin/sh -c 'K=%k; K=$${K#dvb}; printf dvb/adapter%%i/%%s $${K%%%%.*} $${K#*.}", ACTION=="add", \
+                                NAME="%c"
+KERNEL=="card[0-9]*",           NAME="dri/%k"
+
+# misc devices
+KERNEL=="hw_random",            NAME="hwrng"
+KERNEL=="tun",                  NAME="net/%k"
+KERNEL=="evtchn",               NAME="xen/%k"
+
+KERNEL=="cdemu[0-9]*",          NAME="cdemu/%n"
+KERNEL=="pktcdvd[0-9]*",        NAME="pktcdvd/%n"
+KERNEL=="pktcdvd",              NAME="pktcdvd/control"
+
+KERNEL=="cpu[0-9]*",            NAME="cpu/%n/cpuid"
+KERNEL=="msr[0-9]*",            NAME="cpu/%n/msr"
+KERNEL=="microcode",            NAME="cpu/microcode"
+
+KERNEL=="umad*",                NAME="infiniband/%k"
+KERNEL=="issm*",                NAME="infiniband/%k"
+KERNEL=="uverbs*",              NAME="infiniband/%k"
+KERNEL=="ucm*",                 NAME="infiniband/%k"
+KERNEL=="rdma_ucm",             NAME="infiniband/%k"
+
+# ALSA devices
+KERNEL=="controlC[0-9]*",       NAME="snd/%k"
+KERNEL=="hwC[D0-9]*",           NAME="snd/%k"
+KERNEL=="pcmC[D0-9cp]*",        NAME="snd/%k"
+KERNEL=="midiC[D0-9]*",         NAME="snd/%k"
+KERNEL=="timer",                NAME="snd/%k"
+KERNEL=="seq",                  NAME="snd/%k"
+
+# ieee1394 devices       
+KERNEL=="dv1394*",              NAME="dv1394/%n"
+KERNEL=="video1394*",           NAME="video1394/%n"
+
+# input devices
+KERNEL=="mice",                 NAME="input/%k"
+KERNEL=="mouse[0-9]*",          NAME="input/%k"
+KERNEL=="event[0-9]*",          NAME="input/%k"
+KERNEL=="js[0-9]*",             NAME="input/%k"
+KERNEL=="ts[0-9]*",             NAME="input/%k"
+KERNEL=="uinput",               NAME="input/%k"
+
+# Zaptel
+KERNEL=="zapctl",               NAME="zap/ctl"
+KERNEL=="zaptimer",             NAME="zap/timer"
+KERNEL=="zapchannel",           NAME="zap/channel"
+KERNEL=="zappseudo",            NAME="zap/pseudo"
+KERNEL=="zap[0-9]*",            NAME="zap/%n"
+
+# AOE character devices
+SUBSYSTEM=="aoe", KERNEL=="discover",   NAME="etherd/%k"
+SUBSYSTEM=="aoe", KERNEL=="err",        NAME="etherd/%k"
+SUBSYSTEM=="aoe", KERNEL=="interfaces", NAME="etherd/%k"
+SUBSYSTEM=="aoe", KERNEL=="revalidate", NAME="etherd/%k"
+
+# device mapper creates its own device nodes, so ignore these
+KERNEL=="dm-[0-9]*",            OPTIONS+="ignore_device"
+KERNEL=="device-mapper",        NAME="mapper/control"
+
+KERNEL=="rfcomm[0-9]*", NAME="%k", GROUP="users", MODE="0660"
+
+# Firmware Helper
+ACTION=="add", SUBSYSTEM=="firmware", RUN+="/lib/udev/firmware.sh"
+
+# Samsung UARTS
+KERNEL=="s3c2410_serial[0-9]",   NAME="ttySAC%n"
+
+# MXC UARTs
+KERNEL=="ttymxc[0-4]",   NAME="ttymxc%n"
+