[oe-commits] Denys Dmytriyenko : udev 124: add cache invalidation logic on kernel change or its bootargs/cmdline/ atags
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git at amethyst.openembedded.net
Fri Apr 24 02:45:54 UTC 2009
Module: openembedded.git
Branch: org.openembedded.dev
Commit: 5677ff24dfa105e2aaee777c1652fb1a66c1e7a5
URL: http://gitweb.openembedded.net/?p=openembedded.git&a=commit;h=5677ff24dfa105e2aaee777c1652fb1a66c1e7a5
Author: Denys Dmytriyenko <denis at denix.org>
Date: Wed Apr 22 16:43:02 2009 +0000
udev 124: add cache invalidation logic on kernel change or its bootargs/cmdline/atags
also add /etc/default/udev with the option to disable device caching
Signed-off-by: Denys Dmytriyenko <denis at denix.org>
Acked-by: Tom Rini <trini at embeddedalley.com>
Acked-by: Koen Kooi <koen at openembedded.org>
---
recipes/udev/udev-124/default | 4 ++++
recipes/udev/udev-124/init | 29 +++++++++++++++++++++++++----
recipes/udev/udev_124.bb | 10 +++++++++-
3 files changed, 38 insertions(+), 5 deletions(-)
diff --git a/recipes/udev/udev-124/default b/recipes/udev/udev-124/default
new file mode 100644
index 0000000..5c4937a
--- /dev/null
+++ b/recipes/udev/udev-124/default
@@ -0,0 +1,4 @@
+# Default for /etc/init.d/udev
+
+# Comment this out to disable device cache
+DEVCACHE="/etc/dev.tar"
diff --git a/recipes/udev/udev-124/init b/recipes/udev/udev-124/init
index 9e11f08..efe4470 100644
--- a/recipes/udev/udev-124/init
+++ b/recipes/udev/udev-124/init
@@ -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 ] && . /etc/default/udev
[ -f /etc/udev/udev.conf ] && . /etc/udev/udev.conf
kill_udevd() {
@@ -34,9 +35,18 @@ LANG=C awk "\$2 == \"/dev\" && \$4 == \"tmpfs\" { exit 1 }" /proc/mounts && {
mkdir -m 0755 /dev/shm
}
-if [ -e /etc/dev.tar ]; then
- (cd /; tar xf /etc/dev.tar)
- 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 > /tmp/uname || touch /tmp/uname
+ [ -r /proc/cmdline ] && cat /proc/cmdline > /tmp/cmdline || touch /tmp/cmdline
+ [ -r /proc/atags ] && cat /proc/atags > /tmp/atags || touch /tmp/atags
+ if [ -e $DEVCACHE ] && \
+ cmp -s /tmp/uname /etc/udev/saved.uname && \
+ cmp -s /tmp/cmdline /etc/udev/saved.cmdline && \
+ cmp -s /tmp/atags /etc/udev/saved.atags; then
+ (cd /; tar xf $DEVCACHE)
+ not_first_boot=1
+ fi
fi
# make_extra_nodes
@@ -50,10 +60,21 @@ kill_udevd > "/dev/null" 2>&1
if [ "$not_first_boot" != "" ];then
/sbin/udevadm trigger --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 --subsystem-nomatch=platform
(/sbin/udevadm settle --timeout=3; /sbin/udevadm control env STARTUP=)&
+ if [ "$DEVCACHE" != "" ]; then
+ rm -f /tmp/uname
+ rm -f /tmp/cmdline
+ rm -f /tmp/atags
+ fi
else
/sbin/udevadm trigger
/sbin/udevadm settle
- (cd /; tar cf /etc/dev.tar dev)
+ if [ "$DEVCACHE" != "" ]; then
+ echo -n " and populating dev cache"
+ (cd /; tar cf $DEVCACHE dev)
+ mv /tmp/uname /etc/udev/saved.uname
+ mv /tmp/cmdline /etc/udev/saved.cmdline
+ mv /tmp/atags /etc/udev/saved.atags
+ fi
fi
echo
diff --git a/recipes/udev/udev_124.bb b/recipes/udev/udev_124.bb
index 37dc3a7..e5d9d73 100644
--- a/recipes/udev/udev_124.bb
+++ b/recipes/udev/udev_124.bb
@@ -2,7 +2,7 @@ DESCRIPTION = "udev is a daemon which dynamically creates and removes device nod
/dev/, handles hotplug events and loads drivers at boot time. It replaces \
the hotplug package and requires a kernel not older than 2.6.12."
RPROVIDES_${PN} = "hotplug"
-PR = "r15"
+PR = "r16"
SRC_URI = "http://kernel.org/pub/linux/utils/kernel/hotplug/udev-${PV}.tar.gz \
file://noasmlinkage.patch;patch=1 \
@@ -12,6 +12,7 @@ SRC_URI = "http://kernel.org/pub/linux/utils/kernel/hotplug/udev-${PV}.tar.gz \
file://libvolume-id-soname.patch;patch=1 \
file://mount.blacklist \
file://run.rules \
+ file://default \
"
SRC_URI_append_h2200 = " file://50-hostap_cs.rules "
@@ -33,6 +34,9 @@ do_install () {
install -d ${D}${sysconfdir}/init.d
install -m 0755 ${WORKDIR}/init ${D}${sysconfdir}/init.d/udev
+ install -d ${D}${sysconfdir}/default
+ install -m 0755 ${WORKDIR}/default ${D}${sysconfdir}/default/udev
+
install -d ${D}${sysconfdir}/udev/rules.d/
install -m 0644 ${WORKDIR}/mount.blacklist ${D}${sysconfdir}/udev/
@@ -45,6 +49,10 @@ do_install () {
install -m 0644 ${WORKDIR}/devfs-udev.rules ${D}${sysconfdir}/udev/rules.d/devfs-udev.rules
fi
+ touch ${D}${sysconfdir}/udev/saved.uname
+ touch ${D}${sysconfdir}/udev/saved.cmdline
+ touch ${D}${sysconfdir}/udev/saved.atags
+
install -d ${D}${sysconfdir}/udev/scripts/
install -m 0755 ${WORKDIR}/mount.sh ${D}${sysconfdir}/udev/scripts/mount.sh
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