Overhaul if_gif(4):

 o convert to if_transmit;
 o use rmlock to protect access to gif_softc;
 o use sx lock to protect from concurrent ioctls;
 o remove a lot of unneeded and duplicated code;
 o remove cached route support (it won't work with concurrent io);
 o style fixes.

Reviewed by:	melifaro
Obtained from:	Yandex LLC
MFC after:	1 month
Sponsored by:	Yandex LLC

1 files changed, 1 insertions, 11 deletions

diff --git a/share/man/man4/gif.4 b/share/man/man4/gif.4
index 453b4bd..27ee61b 100644
--- a/share/man/man4/gif.4
+++ b/share/man/man4/gif.4
@@ -29,7 +29,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd August 1, 2011
+.Dd October 14, 2014
 .Dt GIF 4
 .Os
 .Sh NAME
@@ -160,16 +160,6 @@ routed network.
 It can be turned off by
 .Dv IFF_LINK2
 bit.
-.Ss Route caching
-Processing each packet requires two route lookups: first on the
-packet itself, and second on the tunnel destination.
-This second route can be cached, increasing tunnel performance.
-However, in a dynamically routed network, the tunnel will stick
-to the cached route, ignoring routing table updates.
-Route caching can be enabled with the
-.Dv IFF_LINK0
-flag.
-.\"
 .Ss Miscellaneous
 By default,
 .Nm