[CONSOLIDATED,PULL,17/25] udev: improve udev-cache robustness
Submitted by Saul Wold on Jan. 6, 2012, 7:56 a.m.
|
Patch ID: 18563
Details
Commit Message
@@ -25,6 +25,7 @@ SRC_URI = "${KERNELORG_MIRROR}/linux/utils/kernel/hotplug/udev-${PV}.tar.gz \
file://network.sh \
file://local.rules \
file://udev-cache \
+ file://udev-cache.default \
file://init"
inherit autotools pkgconfig update-rc.d
@@ -58,7 +59,7 @@ FILES_libgudev = "${base_libdir}/libgudev*.so.* ${libdir}/libgudev*.so.*"
FILES_libgudev-dbg = "${base_libdir}/.debug/libgudev*.so.* ${libdir}/.debug/libgudev*.so.*"
FILES_libgudev-dev = "${includedir}/gudev* ${libdir}/libgudev*.so ${libdir}/libgudev*.la \
${libdir}/libgudev*.a ${libdir}/pkgconfig/gudev*.pc"
-FILES_udev-cache = "${sysconfdir}/init.d/udev-cache"
+FILES_udev-cache = "${sysconfdir}/init.d/udev-cache ${sysconfdir}/default/udev-cache"
FILES_udev-acl = "${base_libdir}/udev/udev-acl ${base_libdir}/udev/rules.d/70-acl.rules"
@@ -72,6 +73,14 @@ do_install_append () {
install -m 0755 ${WORKDIR}/init ${D}${sysconfdir}/init.d/udev
install -m 0755 ${WORKDIR}/udev-cache ${D}${sysconfdir}/init.d/udev-cache
+ install -d ${D}${sysconfdir}/default
+ install -m 0755 ${WORKDIR}/udev-cache.default ${D}${sysconfdir}/default/udev-cache
+
+ touch ${D}${sysconfdir}/udev/saved.uname
+ touch ${D}${sysconfdir}/udev/saved.cmdline
+ touch ${D}${sysconfdir}/udev/saved.devices
+ touch ${D}${sysconfdir}/udev/saved.atags
+
install -d ${D}${sysconfdir}/udev/rules.d/
install -m 0644 ${WORKDIR}/local.rules ${D}${sysconfdir}/udev/rules.d/local.rules
@@ -14,6 +14,7 @@ export TZ=/etc/localtime
[ -d /sys/class ] || exit 1
[ -r /proc/mounts ] || exit 1
[ -x /sbin/udevd ] || exit 1
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
kill_udevd() {
@@ -35,9 +36,20 @@ LANG=C awk '$2 == "/dev" && ($3 == "tmpfs" || $3 == "devtmpfs") { exit 1 }' /pro
[ -e /dev/shm ] || mkdir -m 1777 /dev/shm
-if [ -e /etc/dev.tar ]; then
- (cd /; tar xf /etc/dev.tar 2>&1 | grep -v 'time stamp' || true)
- not_first_boot=1
+if [ "$DEVCACHE" != "" ]; then
+ # Invalidate udev cache if the kernel or its bootargs/cmdline have changed
+ [ -x /bin/uname ] && /bin/uname -mrspv > /dev/shm/uname || touch /dev/shm/uname
+ [ -r /proc/cmdline ] && cat /proc/cmdline > /dev/shm/cmdline || touch /dev/shm/cmdline
+ [ -r /proc/devices ] && cat /proc/devices > /dev/shm/devices || touch /dev/shm/devices
+ [ -r /proc/atags ] && cat /proc/atags > /dev/shm/atags || touch /dev/shm/atags
+ if [ -e $DEVCACHE ] && \
+ cmp -s /dev/shm/uname /etc/udev/saved.uname && \
+ cmp -s /dev/shm/cmdline /etc/udev/saved.cmdline && \
+ cmp -s /dev/shm/devices /etc/udev/saved.devices && \
+ cmp -s /dev/shm/atags /etc/udev/saved.atags; then
+ (cd /; tar xf $DEVCACHE > /dev/null 2>&1)
+ not_first_boot=1
+ fi
fi
# make_extra_nodes
@@ -9,12 +9,26 @@
# Short-Description: cache /dev to speedup the udev next boot
### END INIT INFO
-[ -d /sys/class ] || exit 1
+export TZ=/etc/localtime
+
[ -r /proc/mounts ] || exit 1
[ -x /sbin/udevd ] || exit 1
+[ -d /sys/class ] || exit 1
+
+[ -f /etc/default/udev-cache ] && . /etc/default/udev-cache
-if [ ! -e /etc/dev.tar ]; then
- (cd /; tar cf /etc/dev.tar dev)
+if [ "$DEVCACHE" != "" ]; then
+ echo "Populating dev cache"
+ (cd /; tar cf $DEVCACHE dev)
+ mv /dev/shm/uname /etc/udev/saved.uname
+ mv /dev/shm/cmdline /etc/udev/saved.cmdline
+ mv /dev/shm/devices /etc/udev/saved.devices
+ mv /dev/shm/atags /etc/udev/saved.atags
+else
+ rm -f /dev/shm/uname
+ rm -f /dev/shm/cmdline
+ rm -f /dev/shm/devices
+ rm -f /dev/shm/atags
fi
exit 0
new file mode 100644
@@ -0,0 +1,4 @@
+# Default for /etc/init.d/udev
+
+# Comment this out to disable device cache
+DEVCACHE="/etc/dev.tar"