Fix: lttng-snapshot: use after free of max size argument
[lttng-tools.git] / src / bin / lttng-relayd / ctf-trace.h
1 #ifndef _CTF_TRACE_H
2 #define _CTF_TRACE_H
3
4 /*
5 * Copyright (C) 2013 Julien Desfossez <jdesfossez@efficios.com>
6 * Copyright (C) 2013 David Goulet <dgoulet@efficios.com>
7 * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 *
9 * SPDX-License-Identifier: GPL-2.0-only
10 *
11 */
12
13 #include <inttypes.h>
14 #include <urcu/ref.h>
15
16 #include <common/hashtable/hashtable.h>
17
18 #include "session.h"
19 #include "stream.h"
20 #include "viewer-stream.h"
21
22 struct ctf_trace {
23 struct urcu_ref ref; /* Every stream has a ref on the trace. */
24 struct relay_session *session; /* Back ref to trace session */
25
26 /* Trace sub-folder relative to the session output path. */
27 char *path;
28
29 /*
30 * The ctf_trace lock nests inside the session lock.
31 */
32 pthread_mutex_t lock;
33 uint64_t id;
34 struct relay_viewer_stream *viewer_metadata_stream; /* RCU protected */
35
36 /*
37 * Relay streams associated with this ctf trace.
38 * Updates are protected by the stream_list lock.
39 * Traversals are protected by RCU.
40 */
41 struct cds_list_head stream_list;
42 pthread_mutex_t stream_list_lock;
43
44 /*
45 * Node within session trace hash table. Node is indexed by
46 * stream path name.
47 */
48 struct lttng_ht_node_str node;
49 struct rcu_head rcu_node; /* For call_rcu teardown. */
50
51 /*
52 * True if the metadata stream of this trace was sent the viewer in the
53 * past.
54 */
55 bool metadata_stream_sent_to_viewer;
56 };
57
58 struct ctf_trace *ctf_trace_get_by_path_or_create(struct relay_session *session,
59 const char *subpath);
60 bool ctf_trace_get(struct ctf_trace *trace);
61 void ctf_trace_put(struct ctf_trace *trace);
62
63 int ctf_trace_close(struct ctf_trace *trace);
64
65 struct relay_viewer_stream *ctf_trace_get_viewer_metadata_stream(struct ctf_trace *trace);
66
67 #endif /* _CTF_TRACE_H */
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