[libvirt] [PATCH 01/10] Only build server side drivers as modules

From: "Daniel P. Berrange" <berrange(a)redhat.com&gt; The driver modules all use symbols which are defined in libvirt.so. Thus for loading of modules to work, the binary that libvirt.so is linked to must be exported its symbols back to modules. If the libvirt.so itself is dlopen()d then the RTLD_GLOBAL flag must be set. Unfortunately few, if any, programming languages use the RTLD_GLOBAL flag when loading modules :-( This means is it not practical to use driver modules for any libvirt client side drivers (OpenVZ, VMWare, Hyper-V, Remote client, test). This patch changes the build process so only server side drivers are built as modules (Xen, QEMU, LXC, UML) * daemon/libvirtd.c: Add missing load of 'interface' driver * src/Makefile.am: Only build server side drivers as modules * src/libvirt.c: Don't load any driver modules Signed-off-by: Daniel P. Berrange <berrange(a)redhat.com&gt; --- daemon/libvirtd.c | 29 +++++++++++- src/Makefile.am | 75 ++----------------------------- src/libvirt.c | 129 ++++++++++++++++++----------------------------------- 3 files changed, 74 insertions(+), 159 deletions(-) diff --git a/daemon/libvirtd.c b/daemon/libvirtd.c index 0b5ae35..1e91a45 100644 --- a/daemon/libvirtd.c +++ b/daemon/libvirtd.c @@ -363,14 +363,39 @@ static void daemonInitialize(void) * If they try to open a connection for a module that * is not loaded they'll get a suitable error at that point */ +# ifdef WITH_NETWORK virDriverLoadModule("network"); +# endif +# ifdef WITH_STORAGE virDriverLoadModule("storage"); +# endif +# ifdef WITH_NODE_DEVICES virDriverLoadModule("nodedev"); +# endif +# ifdef WITH_SECRETS virDriverLoadModule("secret"); +# endif +# ifdef WITH_NWFILTER + virDriverLoadModule("nwfilter"); +# endif +# ifdef WITH_INTERFACE + virDriverLoadModule("interface"); +# endif +# ifdef WITH_QEMU virDriverLoadModule("qemu"); +# endif +# ifdef WITH_LXC virDriverLoadModule("lxc"); +# endif +# ifdef WITH_UML virDriverLoadModule("uml"); - virDriverLoadModule("nwfilter"); +# endif +# ifdef WITH_XEN + virDriverLoadModule("xen"); +# endif +# ifdef WITH_LIBXL + virDriverLoadModule("libxl"); +# endif #else # ifdef WITH_NETWORK networkRegister(); @@ -381,7 +406,7 @@ static void daemonInitialize(void) # ifdef WITH_STORAGE_DIR storageRegister(); # endif -# if defined(WITH_NODE_DEVICES) +# ifdef WITH_NODE_DEVICES nodedevRegister(); # endif # ifdef WITH_SECRETS diff --git a/src/Makefile.am b/src/Makefile.am index e9621c1..8ad6644 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -626,27 +626,16 @@ libvirt_driver_la_LIBADD = $(NUMACTL_LIBS) $(GNUTLS_LIBS) $(DLOPEN_LIBS) USED_SYM_FILES = libvirt_private.syms if WITH_TEST -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_test.la -else noinst_LTLIBRARIES += libvirt_driver_test.la libvirt_la_BUILT_LIBADD += libvirt_driver_test.la -endif libvirt_driver_test_la_CFLAGS = \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) -if WITH_DRIVER_MODULES -libvirt_driver_test_la_LDFLAGS = -module -avoid-version $(AM_LDFLAGS) -endif libvirt_driver_test_la_SOURCES = $(TEST_DRIVER_SOURCES) endif if WITH_REMOTE -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_remote.la -else noinst_LTLIBRARIES += libvirt_driver_remote.la libvirt_la_BUILT_LIBADD += libvirt_driver_remote.la -endif libvirt_driver_remote_la_CFLAGS = \ $(GNUTLS_CFLAGS) \ $(XDR_CFLAGS) \ @@ -658,10 +647,6 @@ libvirt_driver_remote_la_LIBADD = $(GNUTLS_LIBS) \ libvirt-net-rpc-client.la \ libvirt-net-rpc-server.la \ libvirt-net-rpc.la -if WITH_DRIVER_MODULES -libvirt_driver_remote_la_LIBADD += ../gnulib/lib/libgnu.la -libvirt_driver_remote_la_LDFLAGS += -module -avoid-version -endif libvirt_driver_remote_la_SOURCES = $(REMOTE_DRIVER_SOURCES) $(srcdir)/remote/remote_driver.c: $(REMOTE_DRIVER_GENERATED) @@ -681,7 +666,8 @@ if WITH_DRIVER_MODULES mod_LTLIBRARIES += libvirt_driver_xen.la else noinst_LTLIBRARIES += libvirt_driver_xen.la -libvirt_la_BUILT_LIBADD += libvirt_driver_xen.la +# Stateful, so linked to daemon instead +#libvirt_la_BUILT_LIBADD += libvirt_driver_xen.la endif libvirt_driver_xen_la_CFLAGS = \ $(XEN_CFLAGS) \ @@ -698,86 +684,48 @@ libvirt_driver_xen_la_SOURCES = $(XEN_DRIVER_SOURCES) endif if WITH_PHYP -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_phyp.la -else noinst_LTLIBRARIES += libvirt_driver_phyp.la libvirt_la_BUILT_LIBADD += libvirt_driver_phyp.la -endif libvirt_driver_phyp_la_LIBADD = $(LIBSSH2_LIBS) -if WITH_DRIVER_MODULES -libvirt_driver_phyp_la_LIBADD += ../gnulib/lib/libgnu.la -libvirt_driver_phyp_la_LDFLAGS = -module -avoid-version $(AM_LDFLAGS) -endif libvirt_driver_phyp_la_CFLAGS = $(LIBSSH2_CFLAGS) \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) libvirt_driver_phyp_la_SOURCES = $(PHYP_DRIVER_SOURCES) endif if WITH_OPENVZ -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_openvz.la -else noinst_LTLIBRARIES += libvirt_driver_openvz.la libvirt_la_BUILT_LIBADD += libvirt_driver_openvz.la -endif libvirt_driver_openvz_la_CFLAGS = \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) -if WITH_DRIVER_MODULES -libvirt_driver_openvz_la_LIBADD = ../gnulib/lib/libgnu.la -libvirt_driver_openvz_la_LDFLAGS = -module -avoid-version $(AM_LDFLAGS) -endif libvirt_driver_openvz_la_SOURCES = $(OPENVZ_DRIVER_SOURCES) endif if WITH_VMWARE -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_vmware.la -else noinst_LTLIBRARIES += libvirt_driver_vmware.la libvirt_la_BUILT_LIBADD += libvirt_driver_vmware.la -endif libvirt_driver_vmware_la_CFLAGS = \ -I$(top_srcdir)/src/conf -I$(top_srcdir)/src/vmx $(AM_CFLAGS) -if WITH_DRIVER_MODULES -libvirt_driver_vmware_la_LIBADD = ../gnulib/lib/libgnu.la -libvirt_driver_vmware_la_LDFLAGS = -module -avoid-version -endif libvirt_driver_vmware_la_SOURCES = $(VMWARE_DRIVER_SOURCES) endif if WITH_VBOX -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_vbox.la -else noinst_LTLIBRARIES += libvirt_driver_vbox.la libvirt_la_BUILT_LIBADD += libvirt_driver_vbox.la -endif libvirt_driver_vbox_la_CFLAGS = \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) libvirt_driver_vbox_la_LIBADD = $(DLOPEN_LIBS) $(MSCOM_LIBS) -if WITH_DRIVER_MODULES -libvirt_driver_vbox_la_LIBADD += ../gnulib/lib/libgnu.la -libvirt_driver_vbox_la_LDFLAGS = -module -avoid-version $(AM_LDFLAGS) -endif libvirt_driver_vbox_la_SOURCES = $(VBOX_DRIVER_SOURCES) endif if WITH_XENAPI -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_xenapi.la -else noinst_LTLIBRARIES += libvirt_driver_xenapi.la libvirt_la_BUILT_LIBADD += libvirt_driver_xenapi.la -endif libvirt_driver_xenapi_la_CFLAGS = $(LIBXENSERVER_CFLAGS) $(LIBCURL_CFLAGS) \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) libvirt_driver_xenapi_la_LDFLAGS = $(AM_LDFLAGS) libvirt_driver_xenapi_la_LIBADD = $(LIBXENSERVER_LIBS) $(LIBCURL_LIBS) -if WITH_DRIVER_MODULES libvirt_driver_xenapi_la_LIBADD += ../gnulib/lib/libgnu.la libvirt_driver_xenapi_la_LDFLAGS += -module -avoid-version -endif libvirt_driver_xenapi_la_SOURCES = $(XENAPI_DRIVER_SOURCES) endif @@ -896,20 +844,12 @@ $(ESX_DRIVER_GENERATED): $(srcdir)/esx/esx_vi_generator.input \ $(AM_V_GEN)srcdir=$(srcdir) $(PYTHON) $(srcdir)/esx/esx_vi_generator.py if WITH_ESX -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_esx.la -else noinst_LTLIBRARIES += libvirt_driver_esx.la libvirt_la_BUILT_LIBADD += libvirt_driver_esx.la -endif libvirt_driver_esx_la_CFLAGS = $(LIBCURL_CFLAGS) \ -I$(top_srcdir)/src/conf -I$(top_srcdir)/src/vmx $(AM_CFLAGS) libvirt_driver_esx_la_LDFLAGS = $(AM_LDFLAGS) libvirt_driver_esx_la_LIBADD = $(LIBCURL_LIBS) -if WITH_DRIVER_MODULES -libvirt_driver_esx_la_LIBADD += ../gnulib/lib/libgnu.la -libvirt_driver_esx_la_LDFLAGS += -module -avoid-version -endif libvirt_driver_esx_la_SOURCES = $(ESX_DRIVER_SOURCES) libvirt_driver_esx_la_DEPENDENCIES = $(ESX_DRIVER_GENERATED) endif @@ -922,20 +862,12 @@ $(HYPERV_DRIVER_GENERATED): $(srcdir)/hyperv/hyperv_wmi_generator.input \ $(AM_V_GEN)srcdir=$(srcdir) $(PYTHON) $(srcdir)/hyperv/hyperv_wmi_generator.py if WITH_HYPERV -if WITH_DRIVER_MODULES -mod_LTLIBRARIES += libvirt_driver_hyperv.la -else noinst_LTLIBRARIES += libvirt_driver_hyperv.la libvirt_la_BUILT_LIBADD += libvirt_driver_hyperv.la -endif libvirt_driver_hyperv_la_CFLAGS = $(OPENWSMAN_CFLAGS) \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) libvirt_driver_hyperv_la_LDFLAGS = $(AM_LDFLAGS) libvirt_driver_hyperv_la_LIBADD = $(OPENWSMAN_LIBS) -if WITH_DRIVER_MODULES -libvirt_driver_hyperv_la_LIBADD += ../gnulib/lib/libgnu.la -libvirt_driver_hyperv_la_LDFLAGS += -module -avoid-version -endif libvirt_driver_hyperv_la_SOURCES = $(HYPERV_DRIVER_SOURCES) endif @@ -966,7 +898,8 @@ if WITH_DRIVER_MODULES mod_LTLIBRARIES += libvirt_driver_interface.la else noinst_LTLIBRARIES += libvirt_driver_interface.la -libvirt_la_BUILT_LIBADD += libvirt_driver_interface.la +# Stateful, so linked to daemon instead +#libvirt_la_BUILT_LIBADD += libvirt_driver_interface.la endif libvirt_driver_interface_la_CFLAGS = $(NETCF_CFLAGS) \ -I$(top_srcdir)/src/conf $(AM_CFLAGS) diff --git a/src/libvirt.c b/src/libvirt.c index 22fc863..8900011 100644 --- a/src/libvirt.c +++ b/src/libvirt.c @@ -45,37 +45,32 @@ #include "virrandom.h" #include "viruri.h" -#ifndef WITH_DRIVER_MODULES -# ifdef WITH_TEST -# include "test/test_driver.h" -# endif -# ifdef WITH_XEN -# include "xen/xen_driver.h" -# endif -# ifdef WITH_REMOTE -# include "remote/remote_driver.h" -# endif -# ifdef WITH_OPENVZ -# include "openvz/openvz_driver.h" -# endif -# ifdef WITH_VMWARE -# include "vmware/vmware_driver.h" -# endif -# ifdef WITH_PHYP -# include "phyp/phyp_driver.h" -# endif -# ifdef WITH_VBOX -# include "vbox/vbox_driver.h" -# endif -# ifdef WITH_ESX -# include "esx/esx_driver.h" -# endif -# ifdef WITH_HYPERV -# include "hyperv/hyperv_driver.h" -# endif -# ifdef WITH_XENAPI -# include "xenapi/xenapi_driver.h" -# endif +#ifdef WITH_TEST +# include "test/test_driver.h" +#endif +#ifdef WITH_REMOTE +# include "remote/remote_driver.h" +#endif +#ifdef WITH_OPENVZ +# include "openvz/openvz_driver.h" +#endif +#ifdef WITH_VMWARE +# include "vmware/vmware_driver.h" +#endif +#ifdef WITH_PHYP +# include "phyp/phyp_driver.h" +#endif +#ifdef WITH_VBOX +# include "vbox/vbox_driver.h" +#endif +#ifdef WITH_ESX +# include "esx/esx_driver.h" +#endif +#ifdef WITH_HYPERV +# include "hyperv/hyperv_driver.h" +#endif +#ifdef WITH_XENAPI +# include "xenapi/xenapi_driver.h" #endif #define VIR_FROM_THIS VIR_FROM_NONE @@ -424,70 +419,32 @@ virInitialize(void) * Note that the order is important: the first ones have a higher * priority when calling virConnectOpen. */ -#ifdef WITH_DRIVER_MODULES - /* We don't care if any of these fail, because the whole point - * is to allow users to only install modules they want to use. - * If they try to open a connection for a module that - * is not loaded they'll get a suitable error at that point - */ -# ifdef WITH_TEST - virDriverLoadModule("test"); -# endif -# ifdef WITH_XEN - virDriverLoadModule("xen"); -# endif -# ifdef WITH_OPENVZ - virDriverLoadModule("openvz"); -# endif -# ifdef WITH_VMWARE - virDriverLoadModule("vmware"); -# endif -# ifdef WITH_VBOX - virDriverLoadModule("vbox"); -# endif -# ifdef WITH_ESX - virDriverLoadModule("esx"); -# endif -# ifdef WITH_HYPERV - virDriverLoadModule("hyperv"); -# endif -# ifdef WITH_XENAPI - virDriverLoadModule("xenapi"); -# endif -# ifdef WITH_REMOTE - virDriverLoadModule("remote"); -# endif -#else -# ifdef WITH_TEST +#ifdef WITH_TEST if (testRegister() == -1) return -1; -# endif -# ifdef WITH_XEN - if (xenRegister () == -1) return -1; -# endif -# ifdef WITH_OPENVZ +#endif +#ifdef WITH_OPENVZ if (openvzRegister() == -1) return -1; -# endif -# ifdef WITH_VMWARE +#endif +#ifdef WITH_VMWARE if (vmwareRegister() == -1) return -1; -# endif -# ifdef WITH_PHYP +#endif +#ifdef WITH_PHYP if (phypRegister() == -1) return -1; -# endif -# ifdef WITH_VBOX +#endif +#ifdef WITH_VBOX if (vboxRegister() == -1) return -1; -# endif -# ifdef WITH_ESX +#endif +#ifdef WITH_ESX if (esxRegister() == -1) return -1; -# endif -# ifdef WITH_HYPERV +#endif +#ifdef WITH_HYPERV if (hypervRegister() == -1) return -1; -# endif -# ifdef WITH_XENAPI +#endif +#ifdef WITH_XENAPI if (xenapiRegister() == -1) return -1; -# endif -# ifdef WITH_REMOTE +#endif +#ifdef WITH_REMOTE if (remoteRegister () == -1) return -1; -# endif #endif return 0; -- 1.7.7.6