Managing and Developing Dynamically Loadable Kernel Modules

Developing Dynamically Loadable Kernel Modules

Chapter 12558

2. Execute the following kminstall command:

/usr/sbin/kminstall -u

module_name

kminstall copies the module’s component ﬁles to the appropriate

locations, thereby overwriting the same named ﬁles at those locations.

Removing the Module’s Components from the System

Use the -d option of the kminstall command to remove a DLKM

module’s components from the system. If the speciﬁed module is listed in

the /etc/loadmods ﬁle, kminstall prints a warning message and

removes the module entry from /etc/loadmods. If the speciﬁed module

is currently loaded, kminstall tries to unload the module. If the unload

fails, it prints a message and exits with an error; otherwise, kminstall

tries to unregister the module. If the unregistration fails, kminstall

prints a message and exits with an error.

To remove a DLKM module’s components, execute the following

kminstall command:

/usr/sbin/kminstall -d

module_name

kminstall deletes the module’s components from the /usr/conf and

/stand subdirectories.

NOTE kminstall does not delete the original component ﬁles for the module.

If the removed DLKM module is statically linked into the running

kernel, you will have to execute config -u to reconﬁgure the kernel once

the module has been removed. Then you will have to shutdown and

restart the system for the new conﬁguration to take effect.

Sample DLKM WSIO Class Driver

This section presents a complete skeleton of a DLKM WSIO class driver

in HP-UX. The ﬁles shown are:

❏ dlclass.c – the template character driver

❏ master – the master ﬁle for the sample character driver

❏ system – the system ﬁle for the sample character driver; $CONFIGURE

and $LOADABLE ﬂags are both set to Y