Change the way information about swap devices is exported to be more

canonical: define a versioned struct xswdev, and add a sysctl node
handler that allows the user to get this structure for a certain device
index by specifying this index as last element of the MIB.
This new node handler, vm.swap_info, replaces the old vm.nswapdev
and vm.swapdevX.* (where X was the index) sysctls.

1 files changed, 12 insertions, 0 deletions

diff --git a/sys/vm/vm_param.h b/sys/vm/vm_param.h
index a0809fe..7237638 100644
--- a/sys/vm/vm_param.h
+++ b/sys/vm/vm_param.h
@@ -105,6 +105,18 @@
 }
 
 /*
+ * Structure for swap device statistics
+ */
+#define XSWDEV_VERSION	1
+struct xswdev {
+	u_int	xsw_version;
+	udev_t	xsw_dev;
+	int	xsw_flags;
+	int	xsw_nblks;
+	int     xsw_used;
+};
+
+/*
  *	Return values from the VM routines.
  */
 #define	KERN_SUCCESS		0