tree 1c4c6427ef74e7e81e0d1a986e15b55f63493d8d
parent eeb7cd56e54e2bc649626988872c170fba37c163
author Michael Brown <mcb30@ipxe.org> 1694618999 +0100
committer Michael Brown <mcb30@ipxe.org> 1694618999 +0100

[netdevice] Allocate private data for each network upper-layer driver

Allow network upper-layer drivers (such as LLDP, which attaches to
each network device in order to provide a corresponding LLDP settings
block) to specify a size for private data, which will be allocated as
part of the network device structure (as with the existing private
data allocated for the underlying device driver).

This will allow network upper-layer drivers to be simplified by
omitting memory allocation and freeing code.  If the upper-layer
driver requires a reference counter (e.g. for interface
initialisation), then it may use the network device's existing
reference counter, since this is now the reference counter for the
containing block of memory.

Signed-off-by: Michael Brown <mcb30@ipxe.org>