+/*
+ Unix SMB/Netbios implementation.
+ Perfcounter initialization and support functions
+ Copyright (C) Todd Stecher 2009
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+*/
+
+#include "includes.h"
+
+struct smb_perfcount_handlers *g_smb_perfcount_handlers = NULL;
+
+struct smb_perfcount_module {
+ char *name;
+ struct smb_perfcount_handlers *handlers;
+ struct smb_perfcount_module *prev, *next;
+};
+
+struct smb_perfcount_module *modules = NULL;
+
+
+/*
+ * a module is registered before it is actually loaded - keep a list
+ *
+ * @todo - currently perfcount modules are globally configured, so
+ * building the list is not strictly required.
+ * However, its a proven concept in VFS, and is here to allow a
+ * move to eventual per-service perfcount configuration.
+ *
+ * Note many pre-connection statistics are interesting
+ * (e.g. before binding to an individual share).
+ *
+ */
+static struct smb_perfcount_module *smb_perfcount_find_module(const char *name)
+{
+ struct smb_perfcount_module *entry = modules;
+
+ while (entry) {
+ if (strcmp(entry->name, name)==0)
+ return entry;
+
+ entry = entry->next;
+ }
+
+ return NULL;
+}
+NTSTATUS smb_register_perfcounter(int interface_version, const char *name,
+ const struct smb_perfcount_handlers *handlers)
+{
+ struct smb_perfcount_module *entry = modules;
+
+ if ((interface_version != SMB_PERFCOUNTER_INTERFACE_VERSION)) {
+ DEBUG(0, ("Failed to register perfcount module.\n"
+ "The module was compiled against "
+ "SMB_PERFCOUNTER_INTERFACE_VERSION %d,\n"
+ "current SMB_PERFCOUNTER_INTERFACE_VERSION is %d.\n"
+ "Please recompile against the current Samba Version!\n",
+ interface_version, SMB_PERFCOUNTER_INTERFACE_VERSION));
+ return NT_STATUS_OBJECT_TYPE_MISMATCH;
+ }
+
+ if (!name || !name[0] || !handlers) {
+ DEBUG(0,("smb_register_perfcounter() called with NULL pointer "
+ "or empty name!\n"));
+ return NT_STATUS_INVALID_PARAMETER;
+ }
+
+ if (smb_perfcount_find_module(name)) {
+ DEBUG(0,("Perfcount Module %s already loaded!\n", name));
+ return NT_STATUS_OK;
+ }
+
+ entry = SMB_XMALLOC_P(struct smb_perfcount_module);
+ entry->name = smb_xstrdup(name);
+ entry->handlers = (struct smb_perfcount_handlers*) handlers;
+
+ DLIST_ADD(modules, entry);
+ DEBUG(0, ("Successfully added perfcounter module '%s'\n", name));
+ return NT_STATUS_OK;
+}
+
+/****************************************************************************
+ initialise smb perf counters
+ ****************************************************************************/
+bool smb_load_perfcount_module(const char *name)
+{
+ char *module_path = NULL;
+ char *module_name = NULL;
+ char *module_param = NULL, *p;
+
+ const struct smb_perfcount_module *entry;
+
+ DEBUG(3, ("Initialising perfcounter module [%s]\n", name));
+
+ if (g_smb_perfcount_handlers) {
+ DEBUG(0,("Only 1 perfcount handler may be registered in "
+ "smb.conf\n"));
+ return true;
+ }
+
+ module_path = smb_xstrdup(name);
+
+ p = strchr_m(module_path, ':');
+
+ if (p) {
+ *p = 0;
+ module_param = p+1;
+ trim_char(module_param, ' ', ' ');
+ }
+
+ trim_char(module_path, ' ', ' ');
+
+ module_name = smb_xstrdup(module_path);
+
+ if (module_name[0] == '/') {
+
+ /*
+ * Extract the module name from the path. Just use the base
+ * name of the last path component.
+ */
+
+ SAFE_FREE(module_name);
+ module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
+
+ p = strchr_m(module_name, '.');
+
+ if (p != NULL) {
+ *p = '\0';
+ }
+ }
+
+ /* load the perfcounter module */
+ if((entry = smb_perfcount_find_module(module_name)) ||
+ (NT_STATUS_IS_OK(smb_probe_module("perfcount", module_path)) &&
+ (entry = smb_perfcount_find_module(module_name)))) {
+
+ DEBUG(0,("Successfully loaded perfcounter module [%s] \n", name));
+ } else {
+ DEBUG(0,("Can't find a perfcounter module [%s]\n",name));
+ goto fail;
+ }
+
+ g_smb_perfcount_handlers = entry->handlers;
+
+ SAFE_FREE(module_path);
+ SAFE_FREE(module_name);
+ return True;
+
+ fail:
+ SAFE_FREE(module_path);
+ SAFE_FREE(module_name);
+ return False;
+}
+
+void smb_init_perfcount_data(struct smb_perfcount_data *pcd)
+{
+
+ ZERO_STRUCTP(pcd);
+ pcd->handlers = g_smb_perfcount_handlers;
+}
+
+bool smb_perfcount_init(void)
+{
+ char *perfcount_object;
+
+ perfcount_object = lp_smb_perfcount_module();
+
+ /* don't init */
+ if (!perfcount_object || !perfcount_object[0])
+ return True;
+
+ if (!smb_load_perfcount_module(perfcount_object)) {
+ DEBUG(0, ("smbd_load_percount_module failed for %s\n",
+ perfcount_object));
+ return False;
+ }
+
+
+ return True;
+}
git.samba.org / nivanova / samba-autobuild / .git / commitdiff