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 modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
19 #ifndef _LTTNG_KCONSUMER_H
20 #define _LTTNG_KCONSUMER_H
22 #include <common/consumer.h>
25 * Mmap the ring buffer, read it and write the data to the tracefile.
27 * Returns the number of bytes written, or negative value on error.
29 extern ssize_t
lttng_kconsumer_on_read_subbuffer_mmap(
30 struct lttng_consumer_local_data
*ctx
,
31 struct lttng_consumer_stream
*stream
, unsigned long len
);
34 * Splice the data from the ring buffer to the tracefile.
36 * Returns the number of bytes spliced, or negative error value on
39 extern ssize_t
lttng_kconsumer_on_read_subbuffer_splice(
40 struct lttng_consumer_local_data
*ctx
,
41 struct lttng_consumer_stream
*stream
, unsigned long len
);
44 * Take a snapshot for a specific fd
46 * Returns 0 on success, < 0 on error
48 int lttng_kconsumer_take_snapshot(struct lttng_consumer_local_data
*ctx
,
49 struct lttng_consumer_stream
*stream
);
52 * Get the produced position
54 * Returns 0 on success, < 0 on error
56 int lttng_kconsumer_get_produced_snapshot(
57 struct lttng_consumer_local_data
*ctx
,
58 struct lttng_consumer_stream
*stream
,
61 int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
62 int sock
, struct pollfd
*consumer_sockpoll
);
65 ssize_t
lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
66 struct lttng_consumer_local_data
*ctx
);
67 int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
69 #endif /* _LTTNG_KCONSUMER_H */