2 * collectd - src/ovs_events.c
4 * Copyright(c) 2016 Intel Corporation. All rights reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy of
7 * this software and associated documentation files (the "Software"), to deal in
8 * the Software without restriction, including without limitation the rights to
9 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
10 * of the Software, and to permit persons to whom the Software is furnished to do
11 * so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in all
14 * copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
25 * Volodymyr Mytnyk <volodymyrx.mytnyk@intel.com>
30 #include "common.h" /* auxiliary functions */
32 #include "utils_ovs.h" /* OVS helpers */
34 #define OVS_EVENTS_IFACE_NAME_SIZE 128
35 #define OVS_EVENTS_IFACE_UUID_SIZE 64
36 #define OVS_EVENTS_EXT_IFACE_ID_SIZE 64
37 #define OVS_EVENTS_EXT_VM_UUID_SIZE 64
38 #define OVS_EVENTS_PLUGIN "ovs_events"
39 #define OVS_EVENTS_CTX_LOCK \
40 for (int __i = ovs_events_ctx_lock(); __i != 0; __i = ovs_events_ctx_unlock())
41 #define OVS_EVENTS_CONFIG_ERROR(option) \
43 ERROR(OVS_EVENTS_PLUGIN ": read '%s' config option failed", option); \
47 /* Link status type */
48 enum ovs_events_link_status_e { DOWN, UP };
49 typedef enum ovs_events_link_status_e ovs_events_link_status_t;
52 struct ovs_events_iface_info_s {
53 char name[OVS_EVENTS_IFACE_NAME_SIZE]; /* interface name */
54 char uuid[OVS_EVENTS_IFACE_UUID_SIZE]; /* interface UUID */
55 char ext_iface_id[OVS_EVENTS_EXT_IFACE_ID_SIZE]; /* external interface id */
56 char ext_vm_uuid[OVS_EVENTS_EXT_VM_UUID_SIZE]; /* external VM UUID */
57 ovs_events_link_status_t link_status; /* interface link status */
58 struct ovs_events_iface_info_s *next; /* next interface info */
60 typedef struct ovs_events_iface_info_s ovs_events_iface_info_t;
63 struct ovs_events_iface_list_s {
64 char name[OVS_EVENTS_IFACE_NAME_SIZE]; /* interface name */
65 struct ovs_events_iface_list_s *next; /* next interface info */
67 typedef struct ovs_events_iface_list_s ovs_events_iface_list_t;
69 /* OVS events configuration data */
70 struct ovs_events_config_s {
71 _Bool send_notification; /* sent notification to collectd? */
72 char ovs_db_node[OVS_DB_ADDR_NODE_SIZE]; /* OVS DB node */
73 char ovs_db_serv[OVS_DB_ADDR_SERVICE_SIZE]; /* OVS DB service */
74 char ovs_db_unix[OVS_DB_ADDR_UNIX_SIZE]; /* OVS DB unix socket path */
75 ovs_events_iface_list_t *ifaces; /* interface info */
77 typedef struct ovs_events_config_s ovs_events_config_t;
79 /* OVS events context type */
80 struct ovs_events_ctx_s {
81 pthread_mutex_t mutex; /* mutex to lock the context */
82 ovs_db_t *ovs_db; /* pointer to OVS DB instance */
83 ovs_events_config_t config; /* plugin config */
84 char *ovs_db_select_params; /* OVS DB select parameter request */
85 _Bool is_db_available; /* specify whether OVS DB is available */
87 typedef struct ovs_events_ctx_s ovs_events_ctx_t;
92 static ovs_events_ctx_t ovs_events_ctx = {
93 .mutex = PTHREAD_MUTEX_INITIALIZER,
94 .config = {.ovs_db_node = "localhost", /* use default OVS DB node */
95 .ovs_db_serv = "6640"} /* use default OVS DB service */
98 /* This function is used only by "OVS_EVENTS_CTX_LOCK" define (see above).
99 * It always returns 1 when context is locked.
101 static int ovs_events_ctx_lock() {
102 pthread_mutex_lock(&ovs_events_ctx.mutex);
106 /* This function is used only by "OVS_EVENTS_CTX_LOCK" define (see above).
107 * It always returns 0 when context is unlocked.
109 static int ovs_events_ctx_unlock() {
110 pthread_mutex_unlock(&ovs_events_ctx.mutex);
114 /* Check if given interface name exists in configuration file. It
115 * returns 1 if exists otherwise 0. If no interfaces are configured,
118 static int ovs_events_config_iface_exists(const char *ifname) {
119 if (ovs_events_ctx.config.ifaces == NULL)
122 /* check if given interface exists */
123 for (ovs_events_iface_list_t *iface = ovs_events_ctx.config.ifaces; iface;
125 if (strcmp(ifname, iface->name) == 0)
131 /* Get OVS DB select parameter request based on rfc7047,
132 * "Transact" & "Select" section
134 static char *ovs_events_get_select_params() {
135 size_t buff_size = 0;
137 char *opt_buff = NULL;
138 static const char params_fmt[] = "[\"Open_vSwitch\"%s]";
139 static const char option_fmt[] =
140 ",{\"op\":\"select\",\"table\":\"Interface\","
141 "\"where\":[[\"name\",\"==\",\"%s\"]],"
142 "\"columns\":[\"link_state\",\"external_ids\","
143 "\"name\",\"_uuid\"]}";
144 static const char default_opt[] =
145 ",{\"op\":\"select\",\"table\":\"Interface\","
146 "\"where\":[],\"columns\":[\"link_state\","
147 "\"external_ids\",\"name\",\"_uuid\"]}";
148 /* setup OVS DB interface condition */
149 for (ovs_events_iface_list_t *iface = ovs_events_ctx.config.ifaces; iface;
150 iface = iface->next) {
151 /* allocate new buffer (format size + ifname len is good enough) */
152 buff_size += sizeof(option_fmt) + strlen(iface->name);
153 char *new_buff = realloc(opt_buff, buff_size);
154 if (new_buff == NULL) {
159 int ret = ssnprintf(opt_buff + buff_off, buff_size - buff_off, option_fmt,
167 /* if no interfaces are configured, use default params */
168 if (opt_buff == NULL)
169 if ((opt_buff = strdup(default_opt)) == NULL)
172 /* allocate memory for OVS DB select params */
173 size_t params_size = sizeof(params_fmt) + strlen(opt_buff);
174 char *params_buff = malloc(params_size);
175 if (params_buff == NULL) {
180 /* create OVS DB select params */
181 if (ssnprintf(params_buff, params_size, params_fmt, opt_buff) < 0)
188 /* Release memory allocated for configuration data */
189 static void ovs_events_config_free() {
190 ovs_events_iface_list_t *del_iface = NULL;
191 sfree(ovs_events_ctx.ovs_db_select_params);
192 while (ovs_events_ctx.config.ifaces) {
193 del_iface = ovs_events_ctx.config.ifaces;
194 ovs_events_ctx.config.ifaces = ovs_events_ctx.config.ifaces->next;
199 /* Parse plugin configuration file and store the config
200 * in allocated memory. Returns negative value in case of error.
202 static int ovs_events_plugin_config(oconfig_item_t *ci) {
203 ovs_events_iface_list_t *new_iface;
205 for (int i = 0; i < ci->children_num; i++) {
206 oconfig_item_t *child = ci->children + i;
207 if (strcasecmp("SendNotification", child->key) == 0) {
208 if (cf_util_get_boolean(child,
209 &ovs_events_ctx.config.send_notification) != 0)
210 OVS_EVENTS_CONFIG_ERROR(child->key);
211 } else if (strcasecmp("Address", child->key) == 0) {
212 if (cf_util_get_string_buffer(
213 child, ovs_events_ctx.config.ovs_db_node,
214 sizeof(ovs_events_ctx.config.ovs_db_node)) != 0)
215 OVS_EVENTS_CONFIG_ERROR(child->key);
216 } else if (strcasecmp("Port", child->key) == 0) {
217 if (cf_util_get_string_buffer(
218 child, ovs_events_ctx.config.ovs_db_serv,
219 sizeof(ovs_events_ctx.config.ovs_db_serv)) != 0)
220 OVS_EVENTS_CONFIG_ERROR(child->key);
221 } else if (strcasecmp("Socket", child->key) == 0) {
222 if (cf_util_get_string_buffer(
223 child, ovs_events_ctx.config.ovs_db_unix,
224 sizeof(ovs_events_ctx.config.ovs_db_unix)) != 0)
225 OVS_EVENTS_CONFIG_ERROR(child->key);
226 } else if (strcasecmp("Interfaces", child->key) == 0) {
227 for (int j = 0; j < child->values_num; j++) {
228 /* check value type */
229 if (child->values[j].type != OCONFIG_TYPE_STRING) {
230 ERROR(OVS_EVENTS_PLUGIN
231 ": given interface name is not a string [idx=%d]",
235 /* allocate memory for configured interface */
236 if ((new_iface = malloc(sizeof(*new_iface))) == NULL) {
237 ERROR(OVS_EVENTS_PLUGIN ": malloc () copy interface name fail");
240 /* store interface name */
241 sstrncpy(new_iface->name, child->values[j].value.string,
242 sizeof(new_iface->name));
243 new_iface->next = ovs_events_ctx.config.ifaces;
244 ovs_events_ctx.config.ifaces = new_iface;
245 DEBUG(OVS_EVENTS_PLUGIN ": found monitored interface \"%s\"",
250 ERROR(OVS_EVENTS_PLUGIN ": option '%s' is not allowed here", child->key);
257 ovs_events_config_free();
261 /* Dispatch OVS interface link status event to collectd */
262 static void ovs_events_dispatch_notification(const ovs_events_iface_info_t *ifinfo) {
263 const char *msg_link_status = NULL;
265 NOTIF_FAILURE, cdtime(), "", "", OVS_EVENTS_PLUGIN, "", "", "", NULL};
267 /* convert link status to message string */
268 switch (ifinfo->link_status) {
270 msg_link_status = "UP";
271 n.severity = NOTIF_OKAY;
274 msg_link_status = "DOWN";
275 n.severity = NOTIF_WARNING;
278 ERROR(OVS_EVENTS_PLUGIN ": unknown interface link status");
282 /* add interface metadata to the notification */
283 if (plugin_notification_meta_add_string(&n, "uuid", ifinfo->uuid) < 0) {
284 ERROR(OVS_EVENTS_PLUGIN ": add interface uuid meta data failed");
288 if (strlen(ifinfo->ext_vm_uuid) > 0)
289 if (plugin_notification_meta_add_string(&n, "vm-uuid",
290 ifinfo->ext_vm_uuid) < 0) {
291 ERROR(OVS_EVENTS_PLUGIN ": add interface vm-uuid meta data failed");
295 if (strlen(ifinfo->ext_iface_id) > 0)
296 if (plugin_notification_meta_add_string(&n, "iface-id",
297 ifinfo->ext_iface_id) < 0) {
298 ERROR(OVS_EVENTS_PLUGIN ": add interface iface-id meta data failed");
302 /* fill the notification data */
303 ssnprintf(n.message, sizeof(n.message),
304 "link state of \"%s\" interface has been changed to \"%s\"",
305 ifinfo->name, msg_link_status);
306 sstrncpy(n.host, hostname_g, sizeof(n.host));
307 sstrncpy(n.plugin_instance, ifinfo->name, sizeof(n.plugin_instance));
308 sstrncpy(n.type, "gauge", sizeof(n.type));
309 sstrncpy(n.type_instance, "link_status", sizeof(n.type_instance));
310 plugin_dispatch_notification(&n);
313 /* Dispatch OVS interface link status value to collectd */
314 static void ovs_events_link_status_submit(const ovs_events_iface_info_t *ifinfo) {
315 value_list_t vl = VALUE_LIST_INIT;
316 meta_data_t *meta = NULL;
318 /* add interface metadata to the submit value */
319 if ((meta = meta_data_create()) != NULL) {
320 if (meta_data_add_string(meta, "uuid", ifinfo->uuid) < 0)
321 ERROR(OVS_EVENTS_PLUGIN ": add interface uuid meta data failed");
323 if (strlen(ifinfo->ext_vm_uuid) > 0)
324 if (meta_data_add_string(meta, "vm-uuid", ifinfo->ext_vm_uuid) < 0)
325 ERROR(OVS_EVENTS_PLUGIN ": add interface vm-uuid meta data failed");
327 if (strlen(ifinfo->ext_iface_id) > 0)
328 if (meta_data_add_string(meta, "iface-id", ifinfo->ext_iface_id) < 0)
329 ERROR(OVS_EVENTS_PLUGIN ": add interface iface-id meta data failed");
332 ERROR(OVS_EVENTS_PLUGIN ": create metadata failed");
335 vl.values = &(value_t){.gauge = (gauge_t)ifinfo->link_status};
337 sstrncpy(vl.plugin, OVS_EVENTS_PLUGIN, sizeof(vl.plugin));
338 sstrncpy(vl.plugin_instance, ifinfo->name, sizeof(vl.plugin_instance));
339 sstrncpy(vl.type, "gauge", sizeof(vl.type));
340 sstrncpy(vl.type_instance, "link_status", sizeof(vl.type_instance));
341 plugin_dispatch_values(&vl);
342 meta_data_destroy(meta);
345 /* Dispatch OVS DB terminate connection event to collectd */
346 static void ovs_events_dispatch_terminate_notification(const char *msg) {
348 NOTIF_FAILURE, cdtime(), "", "", OVS_EVENTS_PLUGIN, "", "", "", NULL};
349 sstrncpy(n.message, msg, sizeof(n.message));
350 sstrncpy(n.host, hostname_g, sizeof(n.host));
351 plugin_dispatch_notification(&n);
354 /* Get OVS DB interface information and stores it into
355 * ovs_events_iface_info_t structure */
356 static int ovs_events_get_iface_info(yajl_val jobject,
357 ovs_events_iface_info_t *ifinfo) {
358 yajl_val jexternal_ids = NULL;
359 yajl_val jvalue = NULL;
360 yajl_val juuid = NULL;
361 const char *state = NULL;
363 /* check YAJL type */
364 if (!YAJL_IS_OBJECT(jobject))
367 /* zero the interface info structure */
368 memset(ifinfo, 0, sizeof(*ifinfo));
370 /* try to find external_ids, name and link_state fields */
371 jexternal_ids = ovs_utils_get_value_by_key(jobject, "external_ids");
372 if (jexternal_ids == NULL || ifinfo == NULL)
375 /* get iface-id from external_ids field */
376 jvalue = ovs_utils_get_map_value(jexternal_ids, "iface-id");
377 if (jvalue != NULL && YAJL_IS_STRING(jvalue))
378 sstrncpy(ifinfo->ext_iface_id, YAJL_GET_STRING(jvalue),
379 sizeof(ifinfo->ext_iface_id));
381 /* get vm-uuid from external_ids field */
382 jvalue = ovs_utils_get_map_value(jexternal_ids, "vm-uuid");
383 if (jvalue != NULL && YAJL_IS_STRING(jvalue))
384 sstrncpy(ifinfo->ext_vm_uuid, YAJL_GET_STRING(jvalue),
385 sizeof(ifinfo->ext_vm_uuid));
387 /* get interface uuid */
388 jvalue = ovs_utils_get_value_by_key(jobject, "_uuid");
389 if (jvalue == NULL || !YAJL_IS_ARRAY(jvalue) ||
390 YAJL_GET_ARRAY(jvalue)->len != 2)
392 juuid = YAJL_GET_ARRAY(jvalue)->values[1];
393 if (juuid == NULL || !YAJL_IS_STRING(juuid))
395 sstrncpy(ifinfo->uuid, YAJL_GET_STRING(juuid), sizeof(ifinfo->uuid));
397 /* get interface name */
398 jvalue = ovs_utils_get_value_by_key(jobject, "name");
399 if (jvalue == NULL || !YAJL_IS_STRING(jvalue))
401 sstrncpy(ifinfo->name, YAJL_GET_STRING(jvalue), sizeof(ifinfo->name));
403 /* get OVS DB interface link status */
404 jvalue = ovs_utils_get_value_by_key(jobject, "link_state");
405 if (jvalue != NULL && ((state = YAJL_GET_STRING(jvalue)) != NULL)) {
406 /* convert OVS table link state to link status */
407 if (strcmp(state, "up") == 0)
408 ifinfo->link_status = UP;
409 else if (strcmp(state, "down") == 0)
410 ifinfo->link_status = DOWN;
415 /* Process OVS DB update table event. It handles link status update event(s)
416 * and dispatches the value(s) to collectd if interface name matches one of
417 * interfaces specified in configuration file.
419 static void ovs_events_table_update_cb(yajl_val jupdates) {
420 yajl_val jnew_val = NULL;
421 yajl_val jupdate = NULL;
422 yajl_val jrow_update = NULL;
423 ovs_events_iface_info_t ifinfo;
425 /* JSON "Interface" table update example:
426 * ---------------------------------
429 * "9adf1db2-29ca-4140-ab22-ae347a4484de":
438 * "link_state":"down"
444 if (!YAJL_IS_OBJECT(jupdates) || !(YAJL_GET_OBJECT(jupdates)->len > 0)) {
445 ERROR(OVS_EVENTS_PLUGIN ": unexpected OVS DB update event received");
448 /* verify if this is a table event */
449 jupdate = YAJL_GET_OBJECT(jupdates)->values[0];
450 if (!YAJL_IS_OBJECT(jupdate)) {
451 ERROR(OVS_EVENTS_PLUGIN ": unexpected table update event received");
454 /* go through all row updates */
455 for (int row_index = 0; row_index < YAJL_GET_OBJECT(jupdate)->len;
457 jrow_update = YAJL_GET_OBJECT(jupdate)->values[row_index];
459 /* check row update */
460 jnew_val = ovs_utils_get_value_by_key(jrow_update, "new");
461 if (jnew_val == NULL) {
462 ERROR(OVS_EVENTS_PLUGIN ": unexpected row update received");
465 /* get OVS DB interface information */
466 if (ovs_events_get_iface_info(jnew_val, &ifinfo) < 0) {
467 ERROR(OVS_EVENTS_PLUGIN
468 " :unexpected interface information data received");
471 if (ovs_events_config_iface_exists(ifinfo.name) != 0) {
472 DEBUG("name=%s, uuid=%s, ext_iface_id=%s, ext_vm_uuid=%s", ifinfo.name,
473 ifinfo.uuid, ifinfo.ext_iface_id, ifinfo.ext_vm_uuid);
474 /* dispatch notification */
475 ovs_events_dispatch_notification(&ifinfo);
480 /* OVS DB reply callback. It parses reply, receives
481 * interface information and dispatches the info to
484 static void ovs_events_poll_result_cb(yajl_val jresult, yajl_val jerror) {
485 yajl_val *jvalues = NULL;
486 yajl_val jvalue = NULL;
487 ovs_events_iface_info_t ifinfo;
489 if (!YAJL_IS_NULL(jerror)) {
490 ERROR(OVS_EVENTS_PLUGIN "error received by OVS DB server");
494 /* result should be an array */
495 if (!YAJL_IS_ARRAY(jresult)) {
496 ERROR(OVS_EVENTS_PLUGIN "invalid data (array is expected)");
500 /* go through all rows and get interface info */
501 jvalues = YAJL_GET_ARRAY(jresult)->values;
502 for (int i = 0; i < YAJL_GET_ARRAY(jresult)->len; i++) {
503 jvalue = ovs_utils_get_value_by_key(jvalues[i], "rows");
504 if (jvalue == NULL || !YAJL_IS_ARRAY(jvalue)) {
505 ERROR(OVS_EVENTS_PLUGIN "invalid data (array of rows is expected)");
508 /* get interfaces info */
509 for (int j = 0; j < YAJL_GET_ARRAY(jvalue)->len; j++) {
510 if (ovs_events_get_iface_info(YAJL_GET_ARRAY(jvalue)->values[j],
512 ERROR(OVS_EVENTS_PLUGIN
513 "unexpected interface information data received");
516 DEBUG("name=%s, uuid=%s, ext_iface_id=%s, ext_vm_uuid=%s", ifinfo.name,
517 ifinfo.uuid, ifinfo.ext_iface_id, ifinfo.ext_vm_uuid);
518 ovs_events_link_status_submit(&ifinfo);
523 /* Setup OVS DB table callback. It subscribes to OVS DB 'Interface' table
524 * to receive link status event(s).
526 static void ovs_events_conn_initialize(ovs_db_t *pdb) {
527 const char tb_name[] = "Interface";
528 const char *columns[] = {"_uuid", "external_ids", "name", "link_state", NULL};
530 /* register update link status event if needed */
531 if (ovs_events_ctx.config.send_notification) {
532 int ret = ovs_db_table_cb_register(pdb, tb_name, columns,
533 ovs_events_table_update_cb, NULL,
534 OVS_DB_TABLE_CB_FLAG_MODIFY);
536 ERROR(OVS_EVENTS_PLUGIN ": register OVS DB update callback failed");
540 OVS_EVENTS_CTX_LOCK { ovs_events_ctx.is_db_available = 1; }
541 DEBUG(OVS_EVENTS_PLUGIN ": OVS DB connection has been initialized");
544 /* OVS DB terminate connection notification callback */
545 static void ovs_events_conn_terminate() {
546 const char msg[] = "OVS DB connection has been lost";
547 if (ovs_events_ctx.config.send_notification)
548 ovs_events_dispatch_terminate_notification(msg);
549 WARNING(OVS_EVENTS_PLUGIN ": %s", msg);
550 OVS_EVENTS_CTX_LOCK { ovs_events_ctx.is_db_available = 0; }
553 /* Read OVS DB interface link status callback */
554 static int ovs_events_plugin_read(__attribute__((unused)) user_data_t *u) {
555 _Bool is_connected = 0;
556 OVS_EVENTS_CTX_LOCK { is_connected = ovs_events_ctx.is_db_available; }
558 if (ovs_db_send_request(ovs_events_ctx.ovs_db, "transact",
559 ovs_events_ctx.ovs_db_select_params,
560 ovs_events_poll_result_cb) < 0) {
561 ERROR(OVS_EVENTS_PLUGIN ": get interface info failed");
567 /* Initialize OVS plugin */
568 static int ovs_events_plugin_init(void) {
569 ovs_db_t *ovs_db = NULL;
570 ovs_db_callback_t cb = {.post_conn_init = ovs_events_conn_initialize,
571 .post_conn_terminate = ovs_events_conn_terminate};
573 DEBUG(OVS_EVENTS_PLUGIN ": OVS DB address=%s, service=%s, unix=%s",
574 ovs_events_ctx.config.ovs_db_node, ovs_events_ctx.config.ovs_db_serv,
575 ovs_events_ctx.config.ovs_db_unix);
577 /* generate OVS DB select condition based on list on configured interfaces */
578 ovs_events_ctx.ovs_db_select_params = ovs_events_get_select_params();
579 if (ovs_events_ctx.ovs_db_select_params == NULL) {
580 ERROR(OVS_EVENTS_PLUGIN ": fail to get OVS DB select condition");
581 goto ovs_events_failure;
584 /* initialize OVS DB */
585 ovs_db = ovs_db_init(ovs_events_ctx.config.ovs_db_node,
586 ovs_events_ctx.config.ovs_db_serv,
587 ovs_events_ctx.config.ovs_db_unix, &cb);
588 if (ovs_db == NULL) {
589 ERROR(OVS_EVENTS_PLUGIN ": fail to connect to OVS DB server");
590 goto ovs_events_failure;
593 /* store OVS DB handler */
594 OVS_EVENTS_CTX_LOCK { ovs_events_ctx.ovs_db = ovs_db; }
596 DEBUG(OVS_EVENTS_PLUGIN ": plugin has been initialized");
600 ERROR(OVS_EVENTS_PLUGIN ": plugin initialize failed");
601 /* release allocated memory */
602 ovs_events_config_free();
606 /* Shutdown OVS plugin */
607 static int ovs_events_plugin_shutdown(void) {
609 if (ovs_db_destroy(ovs_events_ctx.ovs_db))
610 ERROR(OVS_EVENTS_PLUGIN ": OVSDB object destroy failed");
612 /* release memory allocated for config */
613 ovs_events_config_free();
615 DEBUG(OVS_EVENTS_PLUGIN ": plugin has been destroyed");
619 /* Register OVS plugin callbacks */
620 void module_register(void) {
621 plugin_register_complex_config(OVS_EVENTS_PLUGIN, ovs_events_plugin_config);
622 plugin_register_init(OVS_EVENTS_PLUGIN, ovs_events_plugin_init);
623 plugin_register_complex_read(NULL, OVS_EVENTS_PLUGIN, ovs_events_plugin_read,
625 plugin_register_shutdown(OVS_EVENTS_PLUGIN, ovs_events_plugin_shutdown);