Implement PID tracking for kernel tracing
[lttng-tools.git] / src / bin / lttng-relayd / ctf-trace.h
1 /*
2 * Copyright (C) 2013 - Julien Desfossez <jdesfossez@efficios.com>
3 * David Goulet <dgoulet@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License, version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
12 * more details.
13 *
14 * You should have received a copy of the GNU General Public License along with
15 * this program; if not, write to the Free Software Foundation, Inc., 51
16 * Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 */
18
19 #ifndef _CTF_TRACE_H
20 #define _CTF_TRACE_H
21
22 #include <inttypes.h>
23
24 #include <common/hashtable/hashtable.h>
25
26 #include "session.h"
27 #include "stream.h"
28
29 struct ctf_trace {
30 int refcount;
31 unsigned int invalid_flag:1;
32 uint64_t id;
33 uint64_t metadata_received;
34 uint64_t metadata_sent;
35 struct relay_stream *metadata_stream;
36 struct relay_viewer_stream *viewer_metadata_stream;
37 /* Node indexed by stream path name in the corresponding session. */
38 struct lttng_ht_node_str node;
39
40 /* Relay stream associated with this ctf trace. */
41 struct cds_list_head stream_list;
42 };
43
44 static inline void ctf_trace_get_ref(struct ctf_trace *trace)
45 {
46 uatomic_inc(&trace->refcount);
47 }
48
49 static inline void ctf_trace_put_ref(struct ctf_trace *trace)
50 {
51 uatomic_add(&trace->refcount, -1);
52 }
53
54 void ctf_trace_assign(struct relay_stream *stream);
55 struct ctf_trace *ctf_trace_create(char *path_name);
56 void ctf_trace_destroy(struct ctf_trace *obj);
57 void ctf_trace_try_destroy(struct relay_session *session,
58 struct ctf_trace *ctf_trace);
59 struct ctf_trace *ctf_trace_find_by_path(struct lttng_ht *ht,
60 char *path_name);
61 void ctf_trace_add(struct lttng_ht *ht, struct ctf_trace *trace);
62 void ctf_trace_delete(struct lttng_ht *ht, struct ctf_trace *trace);
63
64 #endif /* _CTF_TRACE_H */
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