K 10
svn:author
V 7
glebius
K 8
svn:date
V 27
2015-04-21T20:25:12.398162Z
K 7
svn:log
V 486
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.

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