listing and activation of loglevel by number
[lttng-tools.git] / include / lttng / lttng-kconsumer.h
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1/*
2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License
7 * as published by the Free Software Foundation; only version 2
8 * of the License.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
18 */
19
20#ifndef _LTTNG_KCONSUMER_H
21#define _LTTNG_KCONSUMER_H
22
23#include <lttng/lttng-consumer.h>
24
25/*
26 * Mmap the ring buffer, read it and write the data to the tracefile.
27 *
28 * Returns the number of bytes written.
29 */
30extern int lttng_kconsumer_on_read_subbuffer_mmap(
31 struct lttng_consumer_local_data *ctx,
32 struct lttng_consumer_stream *stream, unsigned long len);
33
34/*
35 * Splice the data from the ring buffer to the tracefile.
36 *
37 * Returns the number of bytes spliced.
38 */
39extern int lttng_kconsumer_on_read_subbuffer_splice(
40 struct lttng_consumer_local_data *ctx,
41 struct lttng_consumer_stream *stream, unsigned long len);
42
43/*
44 * Take a snapshot for a specific fd
45 *
46 * Returns 0 on success, < 0 on error
47 */
48int lttng_kconsumer_take_snapshot(struct lttng_consumer_local_data *ctx,
49 struct lttng_consumer_stream *stream);
50
51/*
52 * Get the produced position
53 *
54 * Returns 0 on success, < 0 on error
55 */
56int lttng_kconsumer_get_produced_snapshot(
57 struct lttng_consumer_local_data *ctx,
58 struct lttng_consumer_stream *stream,
59 unsigned long *pos);
60
61int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
62 int sock, struct pollfd *consumer_sockpoll);
63
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64
65int lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
66 struct lttng_consumer_local_data *ctx);
67int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream);
68
3bd1e081 69#endif /* _LTTNG_KCONSUMER_H */
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