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What is kernel objects in Linux?
Loadable kernel modules (. ko files) are object files that are used to extend the kernel of the Linux Distribution. They are used to provide drivers for new hardware like IoT expansion cards that have not been included in the Linux Distribution.
What is SYS used for in Linux?
/sys is an interface to the kernel. Specifically, it provides a filesystem-like view of information and configuration settings that the kernel provides, much like /proc . Writing to these files may or may not write to the actual device, depending on the setting you’re changing.
How do device drivers perform?
A driver communicates with the device through the computer bus or communications subsystem to which the hardware connects. Once the device sends data back to the driver, the driver may invoke routines in the original calling program. Drivers are hardware dependent and operating-system-specific.
What do you need to know about a KOBJECT?
A kobject is an object of type struct kobject. Kobjects have a name and a reference count. A kobject also has a parent pointer which allows objects to be arranged into hierarchies. They are usually embedded within some other structure which contains the stuff the code is really interested in.
What kind of object is a KOBJECT struct?
A struct kobjectrepresents a kernel object, maybe a device or so, such as the things that show up as directory in the sysfsfilesystem. It is defined as
How are kobjects defined in the Linux kernel?
It is defined as struct kset { struct subsystem *subsys; struct kobj_type *ktype; struct list_head list; struct kobject kobj; struct kset_hotplug_ops *hotplug_ops; }; The field listprovides a circularly linked list of the kobjects that are members of the kset.
Is the KOBJECT the same as a KSET?
Both a kobject and a kset have a field of type struct kobj_type. Such a struct represents a type of objects, and will hold the methods used to operate on them. The definition is struct kobj_type { void (*release)(struct kobject *); struct sysfs_ops * sysfs_ops; struct attribute ** default_attrs; };