Fix possible NULL UST session on start trace
[lttng-tools.git] / lttng-sessiond / channel.h
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1/*
2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 *
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of the GNU General Public License as published by the Free
6 * Software Foundation; only version 2 of the License.
7 *
8 * This program is distributed in the hope that it will be useful, but WITHOUT
9 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
10 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
11 * more details.
12 *
13 * You should have received a copy of the GNU General Public License along with
14 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
15 * Place - Suite 330, Boston, MA 02111-1307, USA.
16 */
17
18#ifndef _LTT_CHANNEL_H
19#define _LTT_CHANNEL_H
20
21#include <lttng/lttng.h>
22
23#include "trace-kernel.h"
44d3bd01 24#include "trace-ust.h"
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25
26int channel_kernel_disable(struct ltt_kernel_session *ksession,
27 char *channel_name);
28int channel_kernel_enable(struct ltt_kernel_session *ksession,
29 struct ltt_kernel_channel *kchan);
30int channel_kernel_create(struct ltt_kernel_session *ksession,
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31 struct lttng_channel *chan, int kernel_pipe);
32
33int channel_ust_create(struct ltt_ust_session *usession,
48842b30 34 struct lttng_channel *chan);
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35int channel_ust_copy(struct ltt_ust_channel *dst,
36 struct ltt_ust_channel *src);
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37int channel_ust_disable(struct ltt_ust_session *usession,
38 struct ltt_ust_channel *uchan, int sock);
39int channel_ust_enable(struct ltt_ust_session *usession,
40 struct ltt_ust_channel *uchan, int sock);
54d01ffb 41
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42struct lttng_channel *channel_new_default_attr(int domain);
43
54d01ffb 44#endif /* _LTT_CHANNEL_H */
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