From df82ff50ed4d9796c4e6b2dae16c3e0e82bfa1fa Mon Sep 17 00:00:00 2001
From: David Malone <dwmalone@FreeBSD.org>
Date: Mon, 4 Jun 2007 18:14:28 +0000
Subject: [PATCH] Add a function for exporting 64 bit types.

---
 sys/kern/kern_sysctl.c | 25 +++++++++++++++++++++++++
 sys/sys/sysctl.h       |  1 +
 2 files changed, 26 insertions(+)

diff --git a/sys/kern/kern_sysctl.c b/sys/kern/kern_sysctl.c
index 666a54154cc..6100f418cfe 100644
--- a/sys/kern/kern_sysctl.c
+++ b/sys/kern/kern_sysctl.c
@@ -891,6 +891,31 @@ sysctl_handle_long(SYSCTL_HANDLER_ARGS)
 	return (error);
 }
 
+/*
+ * Handle a 64 bit int, signed or unsigned.  arg1 points to it.
+ */
+
+int
+sysctl_handle_quad(SYSCTL_HANDLER_ARGS)
+{
+	int error = 0;
+	uint64_t tmpout;
+
+	/*
+	 * Attempt to get a coherent snapshot by making a copy of the data.
+	 */
+	if (!arg1)
+		return (EINVAL);
+	tmpout = *(uint64_t *)arg1;
+	error = SYSCTL_OUT(req, &tmpout, sizeof(uint64_t));
+
+	if (error || !req->newptr)
+		return (error);
+
+	error = SYSCTL_IN(req, arg1, sizeof(uint64_t));
+	return (error);
+}
+
 /*
  * Handle our generic '\0' terminated 'C' string.
  * Two cases:
diff --git a/sys/sys/sysctl.h b/sys/sys/sysctl.h
index 87dad4e9f2b..5d07d6b40f5 100644
--- a/sys/sys/sysctl.h
+++ b/sys/sys/sysctl.h
@@ -170,6 +170,7 @@ struct sysctl_oid {
 int sysctl_handle_int(SYSCTL_HANDLER_ARGS);
 int sysctl_msec_to_ticks(SYSCTL_HANDLER_ARGS);
 int sysctl_handle_long(SYSCTL_HANDLER_ARGS);
+int sysctl_handle_quad(SYSCTL_HANDLER_ARGS);
 int sysctl_handle_intptr(SYSCTL_HANDLER_ARGS);
 int sysctl_handle_string(SYSCTL_HANDLER_ARGS);
 int sysctl_handle_opaque(SYSCTL_HANDLER_ARGS);