When called with a device parameter, chzdev tries to load the kernel
module of the corresponding device type. This might not be desired in
certain situations like early initial RAM-disk processing.
To support this use cases, add a new command-line option
--no-module-load to prevent the loading of any kernel module by chzdev.
Suggested-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: Steffen Eiden <seiden@linux.ibm.com>
Add new command-line option --ipldev. When specified and IPL was done
from a supported device type, the IPL device is selected for the
requested tool operation.
Example to list IPL device information:
$ lszdev --ipldev
Example to create a persistent configuration for the IPL device:
$ chzdev --enable --persistent --ipldev
Reviewed-by: Vineeth Vijayan <vneethv@linux.ibm.com>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
Enhance the 'chzdev' tool by introducing a new option to discern
files created by 'zdev-tools.' The command usage is as follows:
$ chzdev --is-owner <file-name>
When executed, the command will return an exit code of 0 for all
files generated by zdev-tools. In the case of an unknown file, the
tool will return the exit code 'EXIT_UNKNOWN_FILE i.e 33.'
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>
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>
In some high-availability setups, root and boot disks of a Linux
installation are copied to remote sites that can take over execution
of a Linux workload in case of an outage of the original site.
A site in this context is an execution environment such as an LPAR
or z/VM guest.
Each site may provide a different set of devices, or require different
parameters to be applied per device. chzdev supports site-specific
device configuration for up to 10 sites. Each site is identified by
a number in the range 0 to 9. You can provide a separate set of persistent
device configuration for each site. The IPL Load parameter value specified
during boot determines the currently active site. Only the device
configuration of the active site is applied during boot and when new
devices become available. A common configuration can be provided that is
applied when no site-specific configuration is available for a device in
the active site.
User can use the --site parameter to configure devices for a specific
site only. Configuration actions without a site parameter apply to the
common configuration.
During the boot, the active site configuration is chosed based on the
IPL LOADPARM variable. If the LOADPARM contains no valid site-id (0 to 9),
the fallback-site id will be used. The fallback-site-id can also be
configured with the zdev tools by not specifying the --site parameter.
Some of the new chzdev/lszdev commands with site-parameter can be as
follows
1. chzdev -ep f001 --site 3
This command is used to configure the device f001 for the site 3. During
boot, if the LOADPARM value is S3, this device configuration will be
used.
2. lszdev --site 3
This command lists all the devices which are configured for site 3.
3. chzdev -ep f001
Above command does not have a --site parameter. This device settings
will be used for the following conditions
1. When the loadparm specifies a site, (e.g S3), and the device does not
have an associated config-set, zdev uses fallback config set.
2. When the loadparm does not specify any site information, then the
fallback config set will be used.
When the loadparm specifies a site, and the device does not have an
associated config set, nor a fallback site, nothing is configured for this
device.
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>
Auto-configuration is the name of a new configuration target that is
supported by chzdev and lszdev besides the existing active and
persistent configuration targets. Directives created in this new
configuration are stored as udev rules in the /run/udev/rules.d
directory.
Auto-configuration directives are only in effect if there are no
directives for the same device in the user-provided persistent
configuration. This allows users to override auto-configuration
directives if necessary.
Due to the volatile nature of the /run directory, auto-configuration
directives are cleared on reboot. Therefore mechanisms that generate
auto-configuration directives must recreate them on every boot.
The lszdev tool displays auto-configuration data both in list view
as well as in detail view. Users can specify the new option --auto-conf
to only show data from this configuration target.
Mechanisms that generate automated configuration directives can use
chzdev together with the --auto-conf option to create the corresponding
udev rules.
Note: This change does not include a mechanism that generates
auto-configuration directives.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
There are some situations where running "udevadm settle" can result in
a deadlock, such as in the early stages of initial RAM-disk processing.
Introduce a new command-line option --no-settle that can be used to
suppress calling "udevadm settle" to allow chzdev to be run in such
situations.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.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>
