Improve carp(4) locking:

- Use the carp_sx to serialize not only CARP ioctls, but also carp_attach()
  and carp_detach().
- Use cif_mtx to lock only access to those the linked list.
- These locking changes allow us to do some memory allocations with M_WAITOK
  and also properly call callout_drain() in carp_destroy().
- In carp_attach() assert that ifaddr isn't attached. We always come here
  with a pristine address from in[6]_control().

Reviewed by:	oleg
Sponsored by:	Nginx, Inc.

0 files changed, 0 insertions, 0 deletions