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9a0c7f5f83
Missing modules is a common expected scenario for most libvirt usage on RPM distributions like Fedora, so it doesn't really warrant logging at WARN level. Use INFO instead https://bugzilla.redhat.com/show_bug.cgi?id=1274849
120 lines
3.1 KiB
C
120 lines
3.1 KiB
C
/*
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* driver.c: Helpers for loading drivers
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*
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* Copyright (C) 2006-2011 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*/
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#include <config.h>
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#include <unistd.h>
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#include <c-ctype.h>
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#include "driver.h"
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#include "viralloc.h"
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#include "virfile.h"
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#include "virlog.h"
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#include "virutil.h"
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#include "configmake.h"
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#include "virstring.h"
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VIR_LOG_INIT("driver");
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#ifdef WITH_DRIVER_MODULES
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/* XXX re-implment this for other OS, or use libtools helper lib ? */
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# include <dlfcn.h>
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# define DEFAULT_DRIVER_DIR LIBDIR "/libvirt/connection-driver"
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void *
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virDriverLoadModule(const char *name)
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{
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char *modfile = NULL, *regfunc = NULL, *fixedname = NULL;
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char *tmp;
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void *handle = NULL;
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int (*regsym)(void);
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VIR_DEBUG("Module load %s", name);
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if (!(modfile = virFileFindResourceFull(name,
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"libvirt_driver_",
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".so",
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abs_topbuilddir "/src/.libs",
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DEFAULT_DRIVER_DIR,
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"LIBVIRT_DRIVER_DIR")))
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return NULL;
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if (access(modfile, R_OK) < 0) {
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VIR_INFO("Module %s not accessible", modfile);
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goto cleanup;
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}
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virUpdateSelfLastChanged(modfile);
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handle = dlopen(modfile, RTLD_NOW | RTLD_GLOBAL);
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if (!handle) {
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VIR_ERROR(_("failed to load module %s %s"), modfile, dlerror());
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goto cleanup;
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}
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if (VIR_STRDUP_QUIET(fixedname, name) < 0) {
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VIR_ERROR(_("out of memory"));
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goto cleanup;
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}
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/* convert something_like_this into somethingLikeThis */
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while ((tmp = strchr(fixedname, '_'))) {
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memmove(tmp, tmp + 1, strlen(tmp));
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*tmp = c_toupper(*tmp);
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}
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if (virAsprintfQuiet(®func, "%sRegister", fixedname) < 0)
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goto cleanup;
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regsym = dlsym(handle, regfunc);
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if (!regsym) {
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VIR_ERROR(_("Missing module registration symbol %s"), regfunc);
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goto cleanup;
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}
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if ((*regsym)() < 0) {
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VIR_ERROR(_("Failed module registration %s"), regfunc);
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goto cleanup;
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}
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VIR_FREE(modfile);
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VIR_FREE(regfunc);
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VIR_FREE(fixedname);
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return handle;
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cleanup:
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VIR_FREE(modfile);
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VIR_FREE(regfunc);
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VIR_FREE(fixedname);
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if (handle)
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dlclose(handle);
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return NULL;
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}
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/* XXX unload modules, but we can't until we can unregister libvirt drivers */
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#endif
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