Make PFIL use per-VNET lock instead of per-AF lock. Since most used packet

filters (ipfw and PF) use the same ruleset with the same lock for both
AF_INET and AF_INET6 there is no need in more fine-grade locking.
However, it is possible to request personal lock by specifying
PFIL_FLAG_PRIVATE_LOCK flag in pfil_head structure (see pfil.9 for
more details).

Export PFIL lock via rw_lock(9)/rm_lock(9)-like API permitting pfil consumers
to use this lock instead of own lock. This help reducing locks on main
traffic path.

pfil_assert() is currently not implemented due to absense of rm_assert().
Waiting for some kind of r234648 to be merged in HEAD.

This change is part of bigger patch reducing routing locking.

Sponsored by:	Yandex LLC
Reviewed by:	glebius, ae
OK'd by:	silence on net@
MFC after:	3 weeks

0 files changed, 0 insertions, 0 deletions