From 33db4b8da001242b8b3b0ce8a746ef46d4416d6d Mon Sep 17 00:00:00 2001 From: "kay.sievers@vrfy.org" Date: Fri, 23 Jan 2004 21:25:17 -0800 Subject: [PATCH] udev - next round of udev event order daemon Here is the next round of udevd/udevsend: udevsend - If the IPC message we send is not catched by a receiver we fork the udevd daemon to process this and the following events udevd - We reorder the events we receive and execute our current udev for every event. If one or more events are missing, we wait 10 seconds and then go ahead in the queue. If the queue is empty and we don't receive any event for the next 30 seconds, the daemon exits. The next incoming event will fork the daemon again. config - The path's to the executable are specified in udevd.h Now they are pointing to the current directory only. I don't like daemons hiding secrets (and mem leaks :)) inside, so I want to try this model. It should be enough logic to get all possible hotplug events executed in the right order. If no event, then no daemon! So everybody should be happy :) Here we see: 1. the daemon fork, 2. the udev work, 3. the 10 sec timeout and the skipped events, 4. the udev work, ..., 5. and the 30 sec timeout and exit. EVENTS: pim:/home/kay/src/udev.kay# test/udevd_test.sh pim:/home/kay/src/udev.kay# SEQNUM=15 ./udevsend block pim:/home/kay/src/udev.kay# SEQNUM=16 ./udevsend block pim:/home/kay/src/udev.kay# SEQNUM=17 ./udevsend block pim:/home/kay/src/udev.kay# SEQNUM=18 ./udevsend block pim:/home/kay/src/udev.kay# SEQNUM=20 ./udevsend block pim:/home/kay/src/udev.kay# SEQNUM=21 ./udevsend block LOG: Jan 23 15:35:35 pim udev[11795]: message is still in the ipc queue, starting daemon... Jan 23 15:35:35 pim udev[11799]: configured rule in '/etc/udev/udev.rules' at line 19 applied, 'sda' becomes '%k-flash' Jan 23 15:35:35 pim udev[11799]: creating device node '/udev/sda-flash' Jan 23 15:35:35 pim udev[11800]: creating device node '/udev/sdb' Jan 23 15:35:35 pim udev[11804]: creating device node '/udev/sdc' Jan 23 15:35:35 pim udev[11805]: removing device node '/udev/sda-flash' Jan 23 15:35:35 pim udev[11808]: removing device node '/udev/sdb' Jan 23 15:35:35 pim udev[11809]: removing device node '/udev/sdc' Jan 23 15:35:45 pim udev[11797]: timeout reached, skip events 7 - 7 Jan 23 15:35:45 pim udev[11811]: creating device node '/udev/sdb' Jan 23 15:35:45 pim udev[11812]: creating device node '/udev/sdc' Jan 23 15:36:01 pim udev[11797]: timeout reached, skip events 10 - 14 Jan 23 15:36:01 pim udev[11814]: creating device node '/udev/sdc' Jan 23 15:36:04 pim udev[11816]: creating device node '/udev/sdc' Jan 23 15:36:12 pim udev[11818]: creating device node '/udev/sdc' Jan 23 15:36:16 pim udev[11820]: creating device node '/udev/sdc' Jan 23 15:36:38 pim udev[11797]: timeout reached, skip events 19 - 19 Jan 23 15:36:38 pim udev[11823]: creating device node '/udev/sdc' Jan 23 15:36:38 pim udev[11824]: creating device node '/udev/sdc' Jan 23 15:37:08 pim udev[11797]: we have nothing to do, so daemon exits... --- test/udevd_test.sh | 49 +++++++++++++++++++++++++++---------------------- 1 file changed, 27 insertions(+), 22 deletions(-) (limited to 'test') diff --git a/test/udevd_test.sh b/test/udevd_test.sh index 013cdb9d6c..0c7bd431be 100644 --- a/test/udevd_test.sh +++ b/test/udevd_test.sh @@ -1,47 +1,52 @@ #!/bin/bash -# reset udevd, expected sequence number and empty queue -killall -HUP udevd +# kill daemon, first event will start it again +killall udevd -export ACTION=add -export DEVPATH=/block/sda +# connect(123) - disconnect(456) - connect(789) sequence of sda/sdb/sdc export SEQNUM=1 +export ACTION=add +export DEVPATH=/block/sda ./udevsend block export SEQNUM=2 -./udevsend block - -export SEQNUM=3 -./udevsend block - -export SEQNUM=5 +export ACTION=add +export DEVPATH=/block/sdb ./udevsend block export SEQNUM=4 +export ACTION=remove +export DEVPATH=/block/sda ./udevsend block -export SEQNUM=6 +export SEQNUM=3 +export ACTION=add +export DEVPATH=/block/sdc ./udevsend block -export SEQNUM=7 +export SEQNUM=6 +export ACTION=remove +export DEVPATH=/block/sdc ./udevsend block -export SEQNUM=10 +export SEQNUM=5 +export ACTION=remove +export DEVPATH=/block/sdb ./udevsend block -export SEQNUM=9 -#./udevsend block - -export SEQNUM=8 +export SEQNUM=7 +export ACTION=add +export DEVPATH=/block/sda #./udevsend block -export SEQNUM=13 -./udevsend block - -export SEQNUM=12 +export SEQNUM=9 +export ACTION=add +export DEVPATH=/block/sdc ./udevsend block -export SEQNUM=11 +export SEQNUM=8 +export ACTION=add +export DEVPATH=/block/sdb ./udevsend block -- cgit v1.2.3-54-g00ecf