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zdev: Write zfcp-lun udev rules to separate files

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Change chzdev's udev rule generation from the previous approach of
combining all zfcp-lun udev rules associated with an FCP device into a
single file to storing zfcp-lun udev rules in one file per zfcp-lun.
This is done to enable per-device udev rule masking.

With udev rule masking, if a udev rule file by the same name exists in
both /etc and /run, the udev daemon will only consider the rules found
in /etc.

The auto-configuration feature will make use of per-device udev rule
masking to introduce a new class of configuration data (stored in /run)
that is only active if no user-provided configuration data (in /etc)
exists.

In addition, change chzdev to allow the regeneration of udev rules by
using the --force command line like in the following example:

 # chzdev zfcp-lun --configured --enable --persistent --force

This can be used to convert all existing zfcp-lun udev rules from the
old format to the new one.

Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
This commit is contained in:
Peter Oberparleiter
2017-09-01 11:05:54 +02:00
committed by Jan Höppner
parent f32bff9688
commit a86fb8b091
3 changed files with 55 additions and 9 deletions
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2
zdev/src/root.c
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@@ -60,7 +60,7 @@ exit_code_t root_check(void)
/* Check devices. */
dev = device_list_find(sel->st->devices, sel->id, NULL);
if (dev && dev->persistent.exists &&
device_needs_writing(dev, config_persistent)) {
(device_needs_writing(dev, config_persistent) || force)) {
strlist_add(mod, "%s %s", dev->subtype->devname,
dev->id);
}