2 Unix SMB/Netbios implementation.
3 Perfcounter initialization and support functions
4 Copyright (C) Todd Stecher 2009
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>.
23 struct smb_perfcount_handlers *g_smb_perfcount_handlers = NULL;
25 struct smb_perfcount_module {
27 struct smb_perfcount_handlers *handlers;
28 struct smb_perfcount_module *prev, *next;
31 struct smb_perfcount_module *modules = NULL;
35 * a module is registered before it is actually loaded - keep a list
37 * @todo - currently perfcount modules are globally configured, so
38 * building the list is not strictly required.
39 * However, its a proven concept in VFS, and is here to allow a
40 * move to eventual per-service perfcount configuration.
42 * Note many pre-connection statistics are interesting
43 * (e.g. before binding to an individual share).
46 static struct smb_perfcount_module *smb_perfcount_find_module(const char *name)
48 struct smb_perfcount_module *entry = modules;
51 if (strcmp(entry->name, name)==0)
59 NTSTATUS smb_register_perfcounter(int interface_version, const char *name,
60 const struct smb_perfcount_handlers *handlers)
62 struct smb_perfcount_module *entry = modules;
64 if ((interface_version != SMB_PERFCOUNTER_INTERFACE_VERSION)) {
65 DEBUG(0, ("Failed to register perfcount module.\n"
66 "The module was compiled against "
67 "SMB_PERFCOUNTER_INTERFACE_VERSION %d,\n"
68 "current SMB_PERFCOUNTER_INTERFACE_VERSION is %d.\n"
69 "Please recompile against the current Samba Version!\n",
70 interface_version, SMB_PERFCOUNTER_INTERFACE_VERSION));
71 return NT_STATUS_OBJECT_TYPE_MISMATCH;
74 if (!name || !name[0] || !handlers) {
75 DEBUG(0,("smb_register_perfcounter() called with NULL pointer "
77 return NT_STATUS_INVALID_PARAMETER;
80 if (smb_perfcount_find_module(name)) {
81 DEBUG(3,("Perfcount Module %s already loaded!\n", name));
85 entry = SMB_XMALLOC_P(struct smb_perfcount_module);
86 entry->name = smb_xstrdup(name);
87 entry->handlers = (struct smb_perfcount_handlers*) handlers;
89 DLIST_ADD(modules, entry);
90 DEBUG(3, ("Successfully added perfcounter module '%s'\n", name));
94 /****************************************************************************
95 initialise smb perf counters
96 ****************************************************************************/
97 static bool smb_load_perfcount_module(const char *name)
99 char *module_path = NULL;
100 char *module_name = NULL;
101 char *module_param = NULL, *p;
103 const struct smb_perfcount_module *entry;
105 DEBUG(3, ("Initialising perfcounter module [%s]\n", name));
107 if (g_smb_perfcount_handlers) {
108 DEBUG(3,("Only 1 perfcount handler may be registered in "
113 module_path = smb_xstrdup(name);
115 p = strchr_m(module_path, ':');
120 trim_char(module_param, ' ', ' ');
123 trim_char(module_path, ' ', ' ');
125 module_name = smb_xstrdup(module_path);
127 if (module_name[0] == '/') {
130 * Extract the module name from the path. Just use the base
131 * name of the last path component.
134 SAFE_FREE(module_name);
135 module_name = smb_xstrdup(strrchr_m(module_path, '/')+1);
137 p = strchr_m(module_name, '.');
144 /* load the perfcounter module */
145 if((entry = smb_perfcount_find_module(module_name)) ||
146 (NT_STATUS_IS_OK(smb_probe_module("perfcount", module_path)) &&
147 (entry = smb_perfcount_find_module(module_name)))) {
149 DEBUG(3,("Successfully loaded perfcounter module [%s] \n", name));
151 DEBUG(0,("Can't find a perfcounter module [%s]\n",name));
155 g_smb_perfcount_handlers = entry->handlers;
157 SAFE_FREE(module_path);
158 SAFE_FREE(module_name);
162 SAFE_FREE(module_path);
163 SAFE_FREE(module_name);
167 void smb_init_perfcount_data(struct smb_perfcount_data *pcd)
171 pcd->handlers = g_smb_perfcount_handlers;
174 bool smb_perfcount_init(void)
176 char *perfcount_object;
178 perfcount_object = lp_perfcount_module();
181 if (!perfcount_object || !perfcount_object[0])
184 if (!smb_load_perfcount_module(perfcount_object)) {
185 DEBUG(0, ("smbd_load_percount_module failed for %s\n",