Adding upstream version 2:4.17.12+dfsg.upstream/2%4.17.12+dfsgupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 195 insertions, 0 deletions

diff --git a/source3/smbd/perfcount.c b/source3/smbd/perfcount.c
new file mode 100644
index 0000000..c46cd3e
--- /dev/null
+++ b/source3/smbd/perfcount.c
@@ -0,0 +1,195 @@
+/*
+   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"
+#include "smbd/smbd.h"
+
+static 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(3,("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 = discard_const_p(struct smb_perfcount_handlers, handlers);
+
+	DLIST_ADD(modules, entry);
+	DEBUG(3, ("Successfully added perfcounter module '%s'\n", name));
+	return NT_STATUS_OK;
+}
+
+/****************************************************************************
+  initialise smb perf counters
+ ****************************************************************************/
+static 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(3,("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_absolute_path(module_path)) &&
+		(entry = smb_perfcount_find_module(module_name)))) {
+
+		DEBUG(3,("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)
+{
+	const struct loadparm_substitution *lp_sub =
+		loadparm_s3_global_substitution();
+	char *perfcount_object;
+
+	perfcount_object = lp_perfcount_module(talloc_tos(), lp_sub);
+
+	/* 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;
+}