goto no_match;
}
+ /* Filter expression */
+ if (strncmp(event->filter_expression, key->filter_expression,
+ strlen(event->filter_expression)) != 0) {
+ goto no_match;
+ }
+
return 1;
no_match:
key.name = event->name;
key.loglevel_value = event->loglevel_value;
key.loglevel_type = event->loglevel_type;
+ key.filter_expression = event->filter_expression;
node_ptr = cds_lfht_add_unique(ht->ht,
ht->hash_fct(event->node.key, lttng_ht_seed),
static int enable_event(struct agent_app *app, struct agent_event *event)
{
int ret;
+ char *bytes_to_send;
uint64_t data_size;
+ size_t filter_expression_length;
uint32_t reply_ret_code;
struct lttcomm_agent_enable msg;
struct lttcomm_agent_generic_reply reply;
DBG2("Agent enabling event %s for app pid: %d and socket %d", event->name,
app->pid, app->sock->fd);
- data_size = sizeof(msg);
+ /*
+ * Calculate the payload's size, which is the fixed-size struct followed
+ * by the variable-length filter expression (+1 for the ending \0).
+ */
+ if (!event->filter_expression) {
+ filter_expression_length = 0;
+ } else {
+ filter_expression_length = strlen(event->filter_expression) + 1;
+ }
+ data_size = sizeof(msg) + filter_expression_length;
ret = send_header(app->sock, data_size, AGENT_CMD_ENABLE, 0);
if (ret < 0) {
}
memset(&msg, 0, sizeof(msg));
- msg.loglevel_value = event->loglevel_value;
- msg.loglevel_type = event->loglevel_type;
+ msg.loglevel_value = htobe32(event->loglevel_value);
+ msg.loglevel_type = htobe32(event->loglevel_type);
strncpy(msg.name, event->name, sizeof(msg.name));
- ret = send_payload(app->sock, &msg, sizeof(msg));
+ msg.filter_expression_length = htobe32(filter_expression_length);
+
+ bytes_to_send = zmalloc(data_size);
+ if (!bytes_to_send) {
+ ret = LTTNG_ERR_NOMEM;
+ goto error;
+ }
+
+ memcpy(bytes_to_send, &msg, sizeof(msg));
+ if (filter_expression_length > 0) {
+ memcpy(bytes_to_send + sizeof(msg), event->filter_expression,
+ filter_expression_length);
+ }
+
+ ret = send_payload(app->sock, bytes_to_send, data_size);
+ free(bytes_to_send);
if (ret < 0) {
goto error_io;
}
{
struct agent_event *event = NULL;
- DBG3("Agent create new event with name %s, loglevel type %d and loglevel value %d",
- name, loglevel_type, loglevel_value);
+ DBG3("Agent create new event with name %s, loglevel type %d, \
+ loglevel value %d and filter %s",
+ name, loglevel_type, loglevel_value,
+ filter_expression ? filter_expression : "NULL");
if (!name) {
ERR("Failed to create agent event; no name provided.");
}
/*
- * Find a agent event in the given agent using name and loglevel.
+ * Find a agent event in the given agent using name, loglevel and filter.
*
* RCU read side lock MUST be acquired. It must be kept for as long as
* the returned agent_event is used.
*/
struct agent_event *agent_find_event(const char *name,
enum lttng_loglevel_type loglevel_type, int loglevel_value,
- struct agent *agt)
+ char *filter_expression, struct agent *agt)
{
struct lttng_ht_node_str *node;
struct lttng_ht_iter iter;
key.name = name;
key.loglevel_value = loglevel_value;
key.loglevel_type = loglevel_type;
+ key.filter_expression = filter_expression;
cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
ht_match_event, &key, &iter.iter);