Change the initialization methodology for global variables scheduled

for virtualization.

Instead of initializing the affected global variables at instatiation,
assign initial values to them in initializer functions.  As a rule,
initialization at instatiation for such variables should never be
introduced again from now on.  Furthermore, enclose all instantiations
of such global variables in #ifdef VIMAGE_GLOBALS blocks.

Essentialy, this change should have zero functional impact.  In the next
phase of merging network stack virtualization infrastructure from
p4/vimage branch, the new initialization methology will allow us to
switch between using global variables and their counterparts residing in
virtualization containers with minimum code churn, and in the long run
allow us to intialize multiple instances of such container structures.

Discussed at:	devsummit Strassburg
Reviewed by:	bz, julian
Approved by:	julian (mentor)
Obtained from:	//depot/projects/vimage-commit2/...
X-MFC after:	never
Sponsored by:	NLnet Foundation, The FreeBSD Foundation

1 files changed, 19 insertions, 0 deletions

diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h
index 40f060b..3bef611 100644
--- a/sys/netinet/tcp_var.h
+++ b/sys/netinet/tcp_var.h
@@ -517,7 +517,26 @@ extern	int path_mtu_discovery;
 extern	int ss_fltsz;
 extern	int ss_fltsz_local;
 
+extern	int blackhole;
+extern	int drop_synfin;
+extern	int tcp_do_rfc3042;
+extern	int tcp_do_rfc3390;
+extern	int tcp_insecure_rst;
+extern	int tcp_do_autorcvbuf;
+extern	int tcp_autorcvbuf_inc;
+extern	int tcp_autorcvbuf_max;
+
+extern	int tcp_do_tso;
+extern	int tcp_do_autosndbuf;
+extern	int tcp_autosndbuf_inc;
+extern	int tcp_autosndbuf_max;
+
+extern	int nolocaltimewait;
+
 extern	int tcp_do_sack;		/* SACK enabled/disabled */
+extern	int tcp_sack_maxholes;
+extern	int tcp_sack_globalmaxholes;
+extern	int tcp_sack_globalholes;
 extern	int tcp_sc_rst_sock_fail;	/* RST on sock alloc failure */
 extern	int tcp_do_ecn;			/* TCP ECN enabled/disabled */
 extern	int tcp_ecn_maxretries;