2 * Copyright (c) 2015 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 * plugin.c: plugin handling
20 #include <vat/plugin.h>
24 plugin_main_t vat_plugin_main;
27 load_one_plugin (plugin_main_t *pm, plugin_info_t *pi)
29 void *handle, *register_handle;
30 clib_error_t * (*fp)(vat_main_t *);
33 handle = dlopen ((char *)pi->name, RTLD_LAZY);
36 * Note: this can happen if the plugin has an undefined symbol reference,
37 * so print a warning. Otherwise, the poor slob won't know what happened.
38 * Ask me how I know that...
42 clib_warning ("%s", dlerror());
48 register_handle = dlsym (pi->handle, "vat_plugin_register");
49 if (register_handle == 0)
54 error = (*fp)(pm->vat_main);
58 clib_error_report (error);
63 clib_warning ("Loaded plugin: %s", pi->name);
68 static u8 **split_plugin_path (plugin_main_t *pm)
72 u8 *path = pm->plugin_path;
75 for (i = 0; i < vec_len (pm->plugin_path); i++)
79 vec_add1(this, path[i]);
94 int vat_load_new_plugins (plugin_main_t *pm)
104 plugin_path = split_plugin_path (pm);
106 for (i = 0; i < vec_len (plugin_path); i++)
108 dp = opendir ((char *)plugin_path[i]);
113 while ((entry = readdir (dp)))
117 if (pm->plugin_name_filter)
120 for (j = 0; j < vec_len (pm->plugin_name_filter); j++)
121 if (entry->d_name[j] != pm->plugin_name_filter[j])
125 plugin_name = format (0, "%s/%s%c", plugin_path[i],
129 if (stat ((char *)plugin_name, &statb) < 0)
132 vec_free (plugin_name);
136 /* a dir or other things which aren't plugins */
137 if (!S_ISREG(statb.st_mode))
140 p = hash_get_mem (pm->plugin_by_name_hash, plugin_name);
143 vec_add2 (pm->plugin_info, pi, 1);
144 pi->name = plugin_name;
145 pi->file_info = statb;
147 if (load_one_plugin (pm, pi))
149 vec_free (plugin_name);
150 _vec_len (pm->plugin_info) = vec_len (pm->plugin_info) - 1;
153 memset (pi, 0, sizeof (*pi));
154 hash_set_mem (pm->plugin_by_name_hash, plugin_name,
155 pi - pm->plugin_info);
161 vec_free (plugin_path[i]);
163 vec_free (plugin_path);
168 #define QUOTE(x) QUOTE_(x)
171 * Load plugins from /usr/lib/vpp_api_test_plugins by default
173 char *vat_plugin_path = "/usr/lib/vpp_api_test_plugins";
175 char *vat_plugin_name_filter = 0;
177 int vat_plugin_init (vat_main_t * vam)
179 plugin_main_t *pm = &vat_plugin_main;
182 pm->plugin_path = format (0, "%s%c", vat_plugin_path, 0);
183 if (vat_plugin_name_filter)
184 pm->plugin_name_filter = format (0, "%s%c", vat_plugin_name_filter, 0);
186 pm->plugin_by_name_hash = hash_create_string (0, sizeof (uword));
189 return vat_load_new_plugins (pm);