Temporarily introduce a new VOP_SPECSTRATEGY operation while I try

to sort out disk-io from file-io in the vm/buffer/filesystem space.

The intent is to sort VOP_STRATEGY calls into those which operate
on "real" vnodes and those which operate on VCHR vnodes.  For
the latter kind, the call will be changed to VOP_SPECSTRATEGY,
possibly conditionally for those places where dual-use happens.

Add a default VOP_SPECSTRATEGY method which will call the normal
VOP_STRATEGY.  First time it is called it will print debugging
information.  This will only happen if a normal vnode is passed
to VOP_SPECSTRATEGY by mistake.

Add a real VOP_SPECSTRATEGY in specfs, which does what VOP_STRATEGY
does on a VCHR vnode today.

Add a new VOP_STRATEGY method in specfs to catch instances where
the conversion to VOP_SPECSTRATEGY has not yet happened.  Handle
the request just like we always did, but first time called print
debugging information.

Apart up to two instances of console messages per boot, this amounts
to a glorified no-op commit.

If you get any of the messages on your console I would very much
like a copy of them mailed to phk@freebsd.org

1 files changed, 9 insertions, 0 deletions

diff --git a/sys/kern/vnode_if.src b/sys/kern/vnode_if.src
index 4fce819..f62d0ac 100644
--- a/sys/kern/vnode_if.src
+++ b/sys/kern/vnode_if.src
@@ -400,6 +400,15 @@ vop_strategy {
 };
 
 #
+# specstrategy	vp	L L L
+#! specstrategy	pre	vop_strategy_pre
+#
+vop_specstrategy {
+	IN struct vnode *vp;
+	IN struct buf *bp;
+};
+
+#
 #% getwritemount vp	= = =
 #
 vop_getwritemount {