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Patch from:
Hannes Reinecke <hare@suse.de>
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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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On many systems the system kernel headers are not recent enough to
compile udev.
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Export the type of device from ata_id and scsi_id, also strip
leading and trailing whitespace and substitute consecutive
whitespace with a single underline char.
From: Hannes Reinecke <hare@suse.de>
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Used for debugging and event replay from initramfs.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Allow to override some parameters by environment keys.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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Controls the behavior of the running daemon. Currently only stopping and starting
of the execution queue is supported.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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After the first valid netlink-event all event with a serial number
received on the udevsend socket will be ignored.
Signed-off-by: Kay Sievers <kay.sievers@suse.de>
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SUBSYSTEM=="block", RUN="/sbin/program"
will execute the program only for block device events.
ACTION="remove", SUBSYSTEM=="block", RUN"/sbin/program"
will execute the program, if a block device is removed.
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On Tue, 2005-03-15 at 09:25 +0100, Hannes Reinecke wrote:
> The current implementation of the firmware class breaks a fundamental
> assumption in udevd: that the physical device can be initialised fully
> prior to executing the next event for that device.
Thanks to Hannes for the patch.
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==4304== Syscall param sigaction(act) contains uninitialised or unaddressable byte(s)
==4304== at 0x804A37B: (within /sbin/udevd)
==4304== Address 0x52BFE7FC is on thread 1's stack
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If the system reaches a defined limit of processes in running state, udevd
starts to count its own processes in running state from its session (all
forked hotplug child processes, subprocesses and callouts) and throttles
further process forking if the limit is reached.
This should help setups with hundreds of events emitted hotplug events
in parallel with hundreds of processes in "R" state. which makes the machine
unresponsible.
I placed a 100% cpu time consuming program in /etc/hotplug.d/ which runs for 5
seconds. With this patch I can load "scsi_debug add_host=100" without any major
problem. Without the patch the box is completly unresponsible for many minutes.
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UDEVD_EXPECTED_SEQNUM=$[`cat /sys/kernel/hotplug_seqnum` + 1] ./udevd -d
will init udevd, so the next event will not wait for any timeout.
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manager if it doesn't find /dev/null
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We delay the execution of events if there is already an event running for
the same device, a parent or a child device. "add" events with a reference
to a physical device will also wait for the physical device to finish.
Here we fix the devpath comparison logic to return "busy" only if a complete
device names is matching. /block/sdaa will not longer block a /block/sda event.
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Define an inititialization phase, where we delay the events only
for a short time to eventually recollect the event sequence instead
of delaying the very first events for 10 seconds, which breaks the
firmware loader.
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If we take over the hotplug call and manage the events we don't need
to call the event fake script in dev.d/. Just set all expected values
to the new network interface name and call hotplug.d/. This way the
device renaming is completely handled inside of udev and userspace
can't get confused.
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Currently udevd delays only events for the same DEVPATH.
Example of an "add" event sequence:
/block/sda
/block/sda/sda1
With this change, we make sure, that the udev process handling
/block/sda has finished its work (waited for all attributes,
created the node) before we fork the udev event for /block/sda/sda1.
This way the event for sda1 can be sure, that the node for the
main device is already created (may be useful for disk labels).
It will not affect any parallel device handling, only the sequence
of the devices directory chain is serialized. The 10.000 disks
plugged in will still run as parallel events. :)
The main motivation to do this is the program execution of the
dev.d/ and hotplug.d/ directory. If we don't wait for the parent
event to exit, we can't be sure that the executed scripts are
run in the right order.
On Thu, Dec 09, 2004 at 09:18:28AM +0100, Kay Sievers wrote:
> On Wed, 2004-12-08 at 19:07 -0800, David Brownell wrote:
> > Could that argument apply to the underlying hardware, too?
> We now make sure that the sequence of events for a device
> is serialized for every device chain and the class/block
> devices which have a "device" link to a physical device are
> handled after the physical device is fully populated and
> notified to userspace. It will only work this way on kernels
> later than 2.6.10-rc1 cause it depends on the PHYSDEVPATH
> value in the hotplug environment.
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Accept event without a subsystem and pass it through udevd.
Pass empty environment while starting udevd.
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This will prevent a loop, if udev sends events back into the
daemon.
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Just move the event straight to the exec list and don't try
to compare a NULL pointer.
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Make _all_ hotplug variables available to the forked udev,
the udev callouts and the udev dev.d/ scripts. We put the
whole environment into a buffer and send it over the udevd
socket. udevd recreates *envp[] and passes it to the exec().
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Change to the same timeout loop we use in the rest of the code. Change
some comments and names to be more descriptive.
I'm mostly finished with the overall cleanup. I will post a new patch
for the udevd-nofork experiment, which will be much smaller now.
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Seems that we never closed the opened syslog.
Here is a patch to do this in all our binaries.
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This patch fixes the reintroduced bug with the
sig_handler(), if we link against a -mregparm=3 compiled
klibc on i386.
It also fixes some compiler warnings about redefined
asmlinkage on some systems.
Also some (broken?) compilers on distros throw out warnings
if asmlinkage is before "static void". This fixes it, too.
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This patch fixes two
warning: assignment from incompatible pointer type
asmlinkage is the reason for the warning. We can
simply cast to avoid it.
It also fixes this warning:
warning: implicit declaration of function `umask'
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selinux wants a clean fd set, so better close all open fds
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posted by Steve Grubb on https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=130351
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The kernel will use a u64 for the sequence number, so we want the same.
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here we change udevd to pass the SEQNUM from the hotplug environment
to udev and the dev.d/ scripts. We need this for HAL to match the
hotplug event with the dev.d/ events.
It also changes the type from int to long to match the kernel.
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