* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-#define _GNU_SOURCE
#define _LGPL_SOURCE
#include <inttypes.h>
return reg;
}
+/*
+ * Find the consumer channel key from a UST session per-uid channel key.
+ *
+ * Return the matching key or -1 if not found.
+ */
+int buffer_reg_uid_consumer_channel_key(
+ struct cds_list_head *buffer_reg_uid_list,
+ uint64_t usess_id, uint64_t chan_key,
+ uint64_t *consumer_chan_key)
+{
+ struct lttng_ht_iter iter;
+ struct buffer_reg_uid *uid_reg = NULL;
+ struct buffer_reg_session *session_reg = NULL;
+ struct buffer_reg_channel *reg_chan;
+ int ret = -1;
+
+ rcu_read_lock();
+ /*
+ * For the per-uid registry, we have to iterate since we don't have the
+ * uid and bitness key.
+ */
+ cds_list_for_each_entry(uid_reg, buffer_reg_uid_list, lnode) {
+ session_reg = uid_reg->registry;
+ cds_lfht_for_each_entry(session_reg->channels->ht,
+ &iter.iter, reg_chan, node.node) {
+ if (reg_chan->key == chan_key) {
+ *consumer_chan_key = reg_chan->consumer_key;
+ ret = 0;
+ goto end;
+ }
+ }
+ }
+
+end:
+ rcu_read_unlock();
+ return ret;
+}
+
/*
* Allocate and initialize a buffer registry channel with the given key. Set
* regp with the object pointer.