Send indexes in streaming mode

[lttng-tools.git] / src / bin / lttng-relayd / index.h

diff --git a/src/bin/lttng-relayd/index.h b/src/bin/lttng-relayd/index.h
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+++ b/src/bin/lttng-relayd/index.h
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+/*
+ * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
+ *                      David Goulet <dgoulet@efficios.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License, version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along with
+ * this program; if not, write to the Free Software Foundation, Inc., 51
+ * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#ifndef _RELAY_INDEX_H
+#define _RELAY_INDEX_H
+
+#include <inttypes.h>
+#include <pthread.h>
+
+#include <common/hashtable/hashtable.h>
+#include <common/index/index.h>
+
+struct relay_index {
+       /* FD on which to write the index data. */
+       int fd;
+       /*
+        * When destroying this object, this fd is checked and if valid, close it
+        * so this is basically a lazy close of the previous fd corresponding to
+        * the same stream id. This is used for the rotate file feature.
+        */
+       int to_close_fd;
+
+       /* Index packet data. This is the data that is written on disk. */
+       struct lttng_packet_index index_data;
+
+       /* key1 = stream_id, key2 = net_seq_num */
+       struct lttng_ht_two_u64 key;
+       struct lttng_ht_node_two_u64 index_n;
+       struct rcu_head rcu_node;
+       pthread_mutex_t mutex;
+};
+
+struct relay_index *relay_index_create(uint64_t stream_id,
+               uint64_t net_seq_num);
+struct relay_index *relay_index_find(uint64_t stream_id,
+               uint64_t net_seq_num, struct lttng_ht *ht);
+void relay_index_add(struct relay_index *index, struct lttng_ht *ht,
+               struct relay_index **_index);
+int relay_index_write(int fd, struct relay_index *index, struct lttng_ht *ht);
+void relay_index_free(struct relay_index *index);
+void relay_index_free_safe(struct relay_index *index);
+void relay_index_delete(struct relay_index *index, struct lttng_ht *ht);
+void relay_index_destroy_by_stream_id(uint64_t stream_id, struct lttng_ht *ht);
+
+#endif /* _RELAY_INDEX_H */