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Do not label any files in the udev runtime directory, but only nodes,
links and directories below /dev.
In case the runtime directory falls back to /dev/.udev, label this
directory once at udevd startup, but never anything below it.
We should bind the udev socket from systemd, so we are sure
that the abstract namespace socket is always bound by a root
process and there is never a window during an update where
an untrusted process can steal our socket.
Also split the udev.service file, so that the daemon can be
updated/restarted without triggering any coldplug events.
Syslog wants to distinguish the sorce of messages. We should
indicate that this is a userspace message (LOG_DAEMON) and not
a kernel message (LOG_KERNEL).
We need to preserve the database of network interfaces while we
rename them. Use the kernel's numbers wherever possible, instead
of the device names.
Fix wrong database filenames which contain a '/', translated
from '!' in the kernel name.
Fix segfault for kobject pathes where the subsystem can not be
determined from sysfs.
The output will always be quoted:
$ udevadm info --export --export-prefix=MY_ --query=property --name=sda
MY_UDEV_LOG='3'
MY_DEVPATH='/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda'
MY_MAJOR='259'
MY_MINOR='0'
MY_DEVNAME='sda'
MY_DEVTYPE='disk'
MY_SUBSYSTEM='block'
<Md> kay: can you look at rename_netif()? it returns -errno in a place,
but I think that it may by changed by err() (at least)
<kay> Md: yeah, that doesn't look correct
Renaming network devices might delay events for the other device, which has
the same devpath in the meantime as the original event. Causing a delay until
the timout of the event is reached.
Look at the ifindex/devnum of the devices to check if they are really
the same devices.
Fix the manpage to describe the real behaviour of $attr: It doesn't search all
parent devices any more, just the one selected by KERNELS etc.
https://launchpad.net/bugs/348513
Rules files must end in .rules.
Also drop the redundant and confusing sentence about "file names must be
unique". What is really meant is explained in a better way in the paragraph
above.
https://launchpad.net/bugs/616108
Harald Hoyer discovered some incorrect behavior while debugging
problems with network interface renaming:
Udev events might be queued for devices which are renamed. A new
device registered the same time may claime the old name and create
a database entry for it. The current rename logic would move over
this databse entry to the wrong device.
e.g. if eth0 should be eth3 and eth3 is waiting to be renamed,
eth0 was renamed to eth0_rename. The kernel would take eth0 as the name
for a new interface and this new eth0 could also become eth0_rename, if
the target name is also taken. To prevent this name clash, the
interfaces are now renamed to <src>-<dest> and the rename is logged.
For example, not all systems have PROC_KCORE enabled. Avoid a broken symbolic
link in those cases.
Signed-off-by: Yin Kangkai <kangkai.yin@intel.com>
Signed-off-by: Martin Pitt <martin.pitt@ubuntu.com>
