multicast addresses from carp interface. [1]
o Rewrite carpdetach(), so that it does the following things: [1]
- Stops callouts.
- Decrements carp_suppress_preempt, if needed.
- Downs interface and sets CARP state to INIT.
- Calls carp_multicast_cleanup().
- Detaches softc from carp_if and if we are the last frees
the carp_if.
o Use new carpdetach() in carp_clone_destroy().
o In carp_ifdetach() acquire the carp_if lock and cleanup all
interfaces hanging on carp_if. [1]
o Make carp_ifdetach() static and use EVENT(9) to call it
from if_detach(). [2]
o In carp_setrun() exit if the softc doesn't have a valid pointer
to parent. [1]
Obtained from: OpenBSD [1]
Submitted by: Dan Lukes <dan obluda.cz> [2]
PR: kern/82908 [2]
hosts to share an IP address, providing high availability and load
balancing.
Original work on CARP done by Michael Shalayeff, with many
additions by Marco Pfatschbacher and Ryan McBride.
FreeBSD port done solely by Max Laier.
Patch by: mlaier
Obtained from: OpenBSD (mickey, mcbride)
