ap_tools: Introduce ap_tools and the ap-check tool

The ap_tools utilities are intended to be used in conjunction with
the mdevctl utility for safely managing and inspecting vfio-ap
mediated devices.  For now, this will consist of the ap-check tool
which will be driven via a call-out from mdevctl to validate a
proposed vfio-ap mediated device change.

Reviewed-by: Jan Höppner <hoeppner@linux.ibm.com>
Reviewed-by: Tony Krowiak <akrowiak@linux.ibm.com>
Reviewed-by: Jason J. Herne <jjherne@linux.ibm.com>
Signed-off-by: Matthew Rosato <mjrosato@linux.ibm.com>
Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>

ap_tools/Makefile

@@ -0,0 +1,47 @@
+include ../common.mak
+
+MDEVCTL_DIR = /etc/mdevctl.d/
+MDEVCTL_SCRIPTS = /etc/mdevctl.d/scripts.d/
+MDEVCTL_CALLOUTS = /etc/mdevctl.d/scripts.d/callouts/
+
+libs =	$(rootdir)/libap/libap.a \
+	$(rootdir)/libutil/libutil.a
+
+ifeq (${HAVE_LOCKFILE},0)
+all:
+	$(SKIP) HAVE_LOCKFILE=0
+
+install:
+	$(SKIP) HAVE_LOCKFILE=0
+
+else ifeq (${HAVE_JSONC},0)
+all:
+	$(SKIP) HAVE_JSONC=0
+
+install:
+	$(SKIP) HAVE_JSONC=0
+else
+LDLIBS += -llockfile -ljson-c
+
+all: ap-check
+
+ap-check: ap-check.o $(libs)
+
+install: all
+	@if [ ! -d $(DESTDIR)$(MDEVCTL_CALLOUTS) ]; then \
+		mkdir -p $(DESTDIR)$(MDEVCTL_CALLOUTS); \
+		chown $(OWNER).$(GROUP) $(DESTDIR)$(MDEVCTL_DIR); \
+		chown $(OWNER).$(GROUP) $(DESTDIR)$(MDEVCTL_SCRIPTS); \
+		chown $(OWNER).$(GROUP) $(DESTDIR)$(MDEVCTL_CALLOUTS); \
+		chmod 755 $(DESTDIR)$(MDEVCTL_DIR); \
+		chmod 755 $(DESTDIR)$(MDEVCTL_SCRIPTS); \
+		chmod 755 $(DESTDIR)$(MDEVCTL_CALLOUTS); \
+	fi; \
+	$(INSTALL) -g $(GROUP) -o $(OWNER) -m 755 ap-check \
+		$(DESTDIR)$(MDEVCTL_CALLOUTS)
+endif
+
+clean:
+	rm -f *.o *~ ap-check core
+
+.PHONY: all install clean