This change adds base infrastructure for implementing internal device
attributes. In the context of the zdev tools, an internal device
attribute is a new type of device attribute with the following
characteristics:
- Can be set and removed like normal device attributes
- Affects zdev-internal handling only
- Does not correspond to an actual device attribute, that is
it has no representation in SysFS
- Can not be set in the active configuration
- Name starts with "zdev:" to prevent conflicts with actual
device attributes
Values for internal device attributes are stored in udev rules alongside
the normal persistent configuration of a device. They are encoded as
udev environment variables. Note that they have no further effect on
udev processing.
Signed-off-by: Peter Oberparleiter <oberpar@linux.vnet.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
c0392efa39