Introduce --deconfigure-all feature, which will remove all available
settings from the mentioned device. A typical device can have 10
different site-specific settings, active settings, persistent
settings and sometimes auto-configured settings configured in it.
--deconfigure-all can be used to remove all of them with a single
command.
usage: chzdev -D <device-id>
chzdev --deconfigure-all <device-id>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Some Linux distributions always include a copy of all persistent device
configuration data when updating the initial RAM-disk. This makes
chzdev's persistent device configuration changes ineffective because
device configuration directives applied in the RAM-disk take precedence
over those stored in the root filesystem.
This patch introduces a new build-time switch which allows distributions
to specify that whenever there is a persistent device configuration
change, the RAM-disk is updated automatically.
This feature can be enabled by adding 'ZDEV_ALWAYS_UPDATE_INITRD=1' as
a zdev build option. Where, by default ZDEV_ALWAYS_UPDATE_INITRD is 0.
Co-developed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Reviewed-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Enable user to specify that a device should be configured early, that is
during the initial RAM-disk boot phase. This may be necessary, e.g. to
override auto-configuration for a device which is also applied during
that boot phase. It may also be used to manually specify devices that
are required to access the root file system, such as networking devices.
Users can mark devices as requiring early configuration by specifying
a value of 1 for the newly added internal attribute zdev:early:
# chzdev dasd-eckd 0.0.1234 -p zdev:early=1
This can be changed back by removing the attribute setting, or by
setting the attribute value to 0:
# chzdev dasd-eckd 0.0.1234 -p -r zdev:early
or
# chzdev dasd-eckd 0.0.1234 -p zdev:early=0
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
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>
When a persistent device configuration is changed, chzdev tries to
find out if it needs to perform additional steps to make this change
persistent. If this check fails, for example because the root device
is located on a RAM-disk, or on a device type not managed by chzdev,
the tool reports an error and exits with non-zero exit code:
chzdev: Could not determine device that provides /
or
chzdev: Could not determine device that provides loop0
This behavior unnecessarily restricts chzdev from being used in
scripted environments like an installation initial RAM-disk.
Fix this by removing the non-zero exit code and moving the message to
verbose output mode only.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
This commit is based on the s390-tools-1.39.0 version.
Changes on top of s390-tools-1.39.0:
- Add MIT license to all source files
- Add LICENSE file
- Transform REAMDE to README.md (markdown)
- Add AUTHORS.md file
- Add CONTRIBUTING.md file
- Move changelog from README to CHANGELOG.md file
Reviewed-by: Stefan Haberland <sth@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
