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| author | glebius <glebius@FreeBSD.org> | 2011-12-20 13:53:31 +0000 |
|---|---|---|
| committer | glebius <glebius@FreeBSD.org> | 2011-12-20 13:53:31 +0000 |
| commit | 8c74bad9f352ee33107ec1cbfa7273cb27d41a98 (patch) | |
| tree | 5763c925081c47070f96599b2dbbbeee072455c2 /sys/net/if.c | |
| parent | 7cd583b49ab304c1a94bc8e9c2be06e7634dc2bf (diff) | |
| download | FreeBSD-src-8c74bad9f352ee33107ec1cbfa7273cb27d41a98.zip FreeBSD-src-8c74bad9f352ee33107ec1cbfa7273cb27d41a98.tar.gz | |
Restore a feature that was present in 5.x and 6.x, and was cleared in
7.x, 8.x and 9.x with pf(4) imports: pfsync(4) should suppress CARP
preemption, while it is running its bulk update.
However, reimplement the feature in more elegant manner, that is
partially inspired by newer OpenBSD:
- Rename term "suppression" to "demotion", to match with OpenBSD.
- Keep a global demotion factor, that can be raised by several
conditions, for now these are:
- interface goes down
- carp(4) has problems with ip_output() or ip6_output()
- pfsync performs bulk update
- Unlike in OpenBSD the demotion factor isn't a counter, but
is actual value added to advskew. The adjustment values for
particular error conditions are also configurable, and their
defaults are maximum advskew value, so a single failure bumps
demotion to maximum. This is for POLA compatibility, and should
satisfy most users.
- Demotion factor is a writable sysctl, so user can do
foot shooting, if he desires to.
Diffstat (limited to 'sys/net/if.c')
| -rw-r--r-- | sys/net/if.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sys/net/if.c b/sys/net/if.c index 4377343..50aa11c 100644 --- a/sys/net/if.c +++ b/sys/net/if.c @@ -129,6 +129,7 @@ void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); void (*lagg_linkstate_p)(struct ifnet *ifp, int state); /* These are external hooks for CARP. */ void (*carp_linkstate_p)(struct ifnet *ifp); +void (*carp_demote_adj_p)(int, char *); #if defined(INET) || defined(INET6) int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, |
