Split QEMU dtrace probes into separate file

When building as driver modules, it is not possible for the QEMU
driver module to reference the DTrace/SystemTAP probes linked into
the main libvirt.so. Thus we need to move the QEMU probes into a
separate file 'libvirt_qemu_probes.d'. Also rename the existing
file from 'probes.d' to 'libvirt_probes.d' while we're at it

* daemon/Makefile.am, src/internal.h: Include libvirt_probes.h
  instead of probes.h
* src/Makefile.am: Add rules for libvirt_qemu_probes.d
* src/qemu/qemu_monitor.c, src/qemu/qemu_monitor_json.c,
  src/qemu/qemu_monitor_text.c: Include libvirt_qemu_probes.h
* src/libvirt_probes.d: Rename from probes.d
* src/libvirt_qemu_probes.d: QEMU specific probes formerly
  in probes.d

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>

daemon/Makefile.am

@@ -112,7 +112,7 @@ libvirtd_LDADD =					\
 	$(POLKIT_LIBS)
 
 if WITH_DTRACE_PROBES
-libvirtd_LDADD += ../src/probes.o
+libvirtd_LDADD += ../src/libvirt_probes.o
 endif
 
 libvirtd_LDADD += \
@@ -121,6 +121,9 @@ libvirtd_LDADD += \
 if ! WITH_DRIVER_MODULES
 if WITH_QEMU
     libvirtd_LDADD += ../src/libvirt_driver_qemu.la
+if WITH_DTRACE_PROBES
+    libvirtd_LDADD += ../src/libvirt_qemu_probes.o
+endif
 endif
 
 if WITH_LXC

src/Makefile.am

@@ -1246,22 +1246,30 @@ libvirt_la_CFLAGS = -DIN_LIBVIRT $(AM_CFLAGS)
 libvirt_la_DEPENDENCIES = $(libvirt_la_BUILT_LIBADD) $(LIBVIRT_SYMBOL_FILE)
 
 if WITH_DTRACE_PROBES
-libvirt_la_BUILT_LIBADD += probes.o
-libvirt_la_DEPENDENCIES += probes.o
-nodist_libvirt_la_SOURCES = probes.h
+libvirt_la_BUILT_LIBADD += libvirt_probes.o
+libvirt_la_DEPENDENCIES += libvirt_probes.o
+nodist_libvirt_la_SOURCES = libvirt_probes.h
 if WITH_REMOTE
-$(REMOTE_DRIVER_GENERATED): probes.h
+$(REMOTE_DRIVER_GENERATED): libvirt_probes.h
 endif WITH_REMOTE
 
-BUILT_SOURCES += probes.h libvirt_probes.stp libvirt_functions.stp
+BUILT_SOURCES += libvirt_probes.h libvirt_probes.stp libvirt_functions.stp
+
+if WITH_QEMU
+libvirt_driver_qemu_la_LIBADD += libvirt_qemu_probes.o
+nodist_libvirt_driver_qemu_la_SOURCES = libvirt_qemu_probes.h
+libvirt_driver_qemu_la_DEPENDENCIES = libvirt_qemu_probes.o
+
+$(libvirt_driver_qemu_la_SOURCES): libvirt_qemu_probes.h
+endif
 
 tapsetdir = $(datadir)/systemtap/tapset
-tapset_DATA = libvirt_probes.stp libvirt_functions.stp
+tapset_DATA = libvirt_probes.stp libvirt_qemu_probes.stp libvirt_functions.stp
 
-probes.h: probes.d
+%_probes.h: %_probes.d
 	$(AM_V_GEN)$(DTRACE) -o $@ -h -s $<
 
-probes.o: probes.d
+%_probes.o: %_probes.d
 	$(AM_V_GEN)$(DTRACE) -o $@ -G -s $<
 
 RPC_PROBE_FILES = $(srcdir)/rpc/virnetprotocol.x \
@@ -1272,13 +1280,19 @@ RPC_PROBE_FILES = $(srcdir)/rpc/virnetprotocol.x \
 libvirt_functions.stp: $(RPC_PROBE_FILES) $(srcdir)/rpc/gensystemtap.pl
 	$(AM_V_GEN)perl -w $(srcdir)/rpc/gensystemtap.pl $(RPC_PROBE_FILES) > $@
 
-libvirt_probes.stp: probes.d $(srcdir)/dtrace2systemtap.pl
+libvirt_probes.stp: libvirt_probes.d $(srcdir)/dtrace2systemtap.pl
 	$(AM_V_GEN)perl -w $(srcdir)/dtrace2systemtap.pl $(bindir) $(sbindir) $(libdir) $< > $@
 
-CLEANFILES += probes.h probes.o libvirt_functions.stp libvirt_probes.stp
+libvirt_qemu_probes.stp: libvirt_qemu_probes.d $(srcdir)/dtrace2systemtap.pl
+	$(AM_V_GEN)perl -w $(srcdir)/dtrace2systemtap.pl $(bindir) $(sbindir) $(libdir) $< > $@
+
+CLEANFILES += libvirt_probes.h libvirt_probes.o \
+              libvirt_qemu_probes.h libvirt_qemu_probes.o \
+              libvirt_functions.stp libvirt_probes.stp \
+              libvirt_qemu_probes.stp
 endif
 
-EXTRA_DIST += probes.d
+EXTRA_DIST += libvirt_probes.d libvirt_qemu_probes.d
 
 libvirt_qemu_la_SOURCES = libvirt-qemu.c
 libvirt_qemu_la_LDFLAGS = $(VERSION_SCRIPT_FLAGS)$(LIBVIRT_QEMU_SYMBOL_FILE) \
@@ -1465,7 +1479,7 @@ libvirt_lxc_LDADD = $(CAPNG_LIBS) $(YAJL_LIBS) \
 		$(RT_LIBS) $(DBUS_LIBS) \
 		../gnulib/lib/libgnu.la
 if WITH_DTRACE_PROBES
-libvirt_lxc_LDADD += probes.o
+libvirt_lxc_LDADD += libvirt_probes.o
 endif
 if WITH_SECDRIVER_SELINUX
 libvirt_lxc_LDADD += $(SELINUX_LIBS)
@@ -1510,7 +1524,7 @@ virt_aa_helper_LDADD =						\
 		libvirt_util.la					\
 		../gnulib/lib/libgnu.la
 if WITH_DTRACE_PROBES
-virt_aa_helper_LDADD += probes.o
+virt_aa_helper_LDADD += libvirt_probes.o
 endif
 virt_aa_helper_CFLAGS =						\
 		-I$(top_srcdir)/src/conf			\

src/internal.h

@@ -250,7 +250,7 @@
 # if WITH_DTRACE_PROBES
 #  ifndef LIBVIRT_PROBES_H
 #   define LIBVIRT_PROBES_H
-#   include "probes.h"
+#   include "libvirt_probes.h"
 #  endif /* LIBVIRT_PROBES_H */
 
 /* Systemtap 1.2 headers have a bug where they cannot handle a

src/libvirt_probes.d

@@ -82,25 +82,4 @@ provider libvirt {
 	probe rpc_keepalive_send(void *ka, void *client, int prog, int vers, int proc);
 	probe rpc_keepalive_received(void *ka, void *client, int prog, int vers, int proc);
 	probe rpc_keepalive_timeout(void *ka, void *client, int coundToDeath, int idle);
-
-
-        # file: src/qemu/qemu_monitor.c
-        # prefix: qemu
-        # binary: libvirtd
-        # Monitor lifecycle
-        probe qemu_monitor_new(void *mon, int refs, int fd);
-        probe qemu_monitor_ref(void *mon, int refs);
-        probe qemu_monitor_unref(void *mon, int refs);
-        probe qemu_monitor_close(void *monm, int refs);
-
-        # High level monitor message processing
-        probe qemu_monitor_send_msg(void *mon, const char *msg, int fd);
-        probe qemu_monitor_recv_reply(void *mon, const char *reply);
-        probe qemu_monitor_recv_event(void *mon, const char *event);
-
-        # Low level monitor I/O processing
-        probe qemu_monitor_io_process(void *mon, const char *buf, unsigned int len);
-        probe qemu_monitor_io_read(void *mon, const char *buf, unsigned int len, int ret, int errno);
-        probe qemu_monitor_io_write(void *mon, const char *buf, unsigned int len, int ret, int errno);
-        probe qemu_monitor_io_send_fd(void *mon, int fd, int ret, int errno);
 };

src/libvirt_qemu_probes.d

@@ -0,0 +1,21 @@
+provider libvirt {
+        # file: src/qemu/qemu_monitor.c
+        # prefix: qemu
+        # binary: libvirtd
+        # Monitor lifecycle
+        probe qemu_monitor_new(void *mon, int refs, int fd);
+        probe qemu_monitor_ref(void *mon, int refs);
+        probe qemu_monitor_unref(void *mon, int refs);
+        probe qemu_monitor_close(void *monm, int refs);
+
+        # High level monitor message processing
+        probe qemu_monitor_send_msg(void *mon, const char *msg, int fd);
+        probe qemu_monitor_recv_reply(void *mon, const char *reply);
+        probe qemu_monitor_recv_event(void *mon, const char *event);
+
+        # Low level monitor I/O processing
+        probe qemu_monitor_io_process(void *mon, const char *buf, unsigned int len);
+        probe qemu_monitor_io_read(void *mon, const char *buf, unsigned int len, int ret, int errno);
+        probe qemu_monitor_io_write(void *mon, const char *buf, unsigned int len, int ret, int errno);
+        probe qemu_monitor_io_send_fd(void *mon, int fd, int ret, int errno);
+};

src/qemu/qemu_monitor.c

@@ -37,6 +37,10 @@
 #include "logging.h"
 #include "virfile.h"
 
+#ifdef WITH_DTRACE_PROBES
+# include "libvirt_qemu_probes.h"
+#endif
+
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
 #define DEBUG_IO 0

src/qemu/qemu_monitor_json.c

@@ -43,6 +43,10 @@
 #include "json.h"
 #include "ignore-value.h"
 
+#ifdef WITH_DTRACE_PROBES
+# include "libvirt_qemu_probes.h"
+#endif
+
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
 

src/qemu/qemu_monitor_text.c

@@ -41,6 +41,10 @@
 #include "virterror_internal.h"
 #include "buf.h"
 
+#ifdef WITH_DTRACE_PROBES
+# include "libvirt_qemu_probes.h"
+#endif
+
 #define VIR_FROM_THIS VIR_FROM_QEMU
 
 #define QEMU_CMD_PROMPT "\n(qemu) "

tests/Makefile.am

@@ -31,7 +31,7 @@ endif
 
 PROBES_O =
 if WITH_DTRACE_PROBES
-PROBES_O += ../src/probes.o
+PROBES_O += ../src/libvirt_probes.o
 endif
 
 LDADDS = \
@@ -290,6 +290,9 @@ qemu_LDADDS = ../src/libvirt_driver_qemu.la
 if WITH_NETWORK
 qemu_LDADDS += ../src/libvirt_driver_network.la
 endif
+if WITH_DTRACE_PROBES
+qemu_LDADDS += ../src/libvirt_qemu_probes.o
+endif
 qemu_LDADDS += $(LDADDS)
 
 qemuxml2argvtest_SOURCES = \