netlink: add validation function to policy
authorJohannes Berg <johannes.berg@intel.com>
Thu, 27 Sep 2018 09:28:36 +0000 (11:28 +0200)
committerDavid S. Miller <davem@davemloft.net>
Tue, 2 Oct 2018 06:05:31 +0000 (23:05 -0700)
commit33188bd6430ef06d206ae4fda2cc92f14f16fd20
treebd3980a02a9896a5a1d60936b451ce40efc44349
parent3e48be05f3c7eb6f6126939e9d957903c5cfeee5
netlink: add validation function to policy

Add the ability to have an arbitrary validation function attached
to a netlink policy that doesn't already use the validation_data
pointer in another way.

This can be useful to validate for example the content of a binary
attribute, like in nl80211 the "(information) elements", which must
be valid streams of "u8 type, u8 length, u8 value[length]".

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
include/net/netlink.h
lib/nlattr.c