2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
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
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.
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.
20 #ifndef _LTTNG_KCONSUMER_H
21 #define _LTTNG_KCONSUMER_H
23 #include <common/consumer.h>
26 * Mmap the ring buffer, read it and write the data to the tracefile.
28 * Returns the number of bytes written, or negative value on error.
30 extern ssize_t
lttng_kconsumer_on_read_subbuffer_mmap(
31 struct lttng_consumer_local_data
*ctx
,
32 struct lttng_consumer_stream
*stream
, unsigned long len
);
35 * Splice the data from the ring buffer to the tracefile.
37 * Returns the number of bytes spliced, or negative error value on
40 extern ssize_t
lttng_kconsumer_on_read_subbuffer_splice(
41 struct lttng_consumer_local_data
*ctx
,
42 struct lttng_consumer_stream
*stream
, unsigned long len
);
45 * Take a snapshot for a specific fd
47 * Returns 0 on success, < 0 on error
49 int lttng_kconsumer_take_snapshot(struct lttng_consumer_local_data
*ctx
,
50 struct lttng_consumer_stream
*stream
);
53 * Get the produced position
55 * Returns 0 on success, < 0 on error
57 int lttng_kconsumer_get_produced_snapshot(
58 struct lttng_consumer_local_data
*ctx
,
59 struct lttng_consumer_stream
*stream
,
62 int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
63 int sock
, struct pollfd
*consumer_sockpoll
);
66 ssize_t
lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
67 struct lttng_consumer_local_data
*ctx
);
68 int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
70 #endif /* _LTTNG_KCONSUMER_H */