From 3723b8bfdb92b4cb1746b866b2d07c0a2bebffe0 Mon Sep 17 00:00:00 2001
From: Edward Tomasz Napierala <trasz@FreeBSD.org>
Date: Fri, 22 May 2015 12:01:29 +0000
Subject: [PATCH] Start documenting ctl(4) sysctls.

MFC after:	2 weeks
Sponsored by:	The FreeBSD Foundation
---
 share/man/man4/ctl.4 | 18 +++++++++++++++++-
 1 file changed, 17 insertions(+), 1 deletion(-)

diff --git a/share/man/man4/ctl.4 b/share/man/man4/ctl.4
index a04f2fe409b..49d98a0c985 100644
--- a/share/man/man4/ctl.4
+++ b/share/man/man4/ctl.4
@@ -23,7 +23,7 @@
 .\" SUCH DAMAGE.
 .\"
 .\" $FreeBSD$
-.Dd April 8, 2015
+.Dd May 22, 2015
 .Dt CTL 4
 .Os
 .Sh NAME
@@ -84,6 +84,22 @@ All I/O handled in-kernel, no userland context switch overhead
 .El
 .Pp
 It also serves as a kernel component of the native iSCSI target.
+.Sh SYSCTL VARIABLES
+The following variables are available as both
+.Xr sysctl 8
+variables and
+.Xr loader 8
+tunables:
+.Bl -tag -width indent
+.It Va kern.cam.ctl.iscsi.maxcmdsn_delta
+The number of outstanding commands to advertise to the initiator.
+Technically, it's the difference between ExpCmdSN and MaxCmdSN fields
+in the iSCSI PDU.
+.It Va kern.cam.ctl.iscsi.ping_timeout
+The number of seconds to wait for the initiator to respond to a NOP-In
+PDU.
+In the event that there is no response within that time the session gets
+forcibly terminated.
 .Sh SEE ALSO
 .Xr ctladm 8 ,
 .Xr ctld 8 ,