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3bd1e081 MD |
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 | ||
10a8a223 | 23 | #include <common/consumer.h> |
3bd1e081 MD |
24 | |
25 | /* | |
26 | * Mmap the ring buffer, read it and write the data to the tracefile. | |
27 | * | |
4078b776 | 28 | * Returns the number of bytes written, or negative value on error. |
3bd1e081 | 29 | */ |
4078b776 | 30 | extern ssize_t lttng_kconsumer_on_read_subbuffer_mmap( |
3bd1e081 MD |
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 | * | |
4078b776 MD |
37 | * Returns the number of bytes spliced, or negative error value on |
38 | * error. | |
3bd1e081 | 39 | */ |
4078b776 | 40 | extern ssize_t lttng_kconsumer_on_read_subbuffer_splice( |
3bd1e081 MD |
41 | struct lttng_consumer_local_data *ctx, |
42 | struct lttng_consumer_stream *stream, unsigned long len); | |
43 | ||
44 | /* | |
45 | * Take a snapshot for a specific fd | |
46 | * | |
47 | * Returns 0 on success, < 0 on error | |
48 | */ | |
49 | int lttng_kconsumer_take_snapshot(struct lttng_consumer_local_data *ctx, | |
50 | struct lttng_consumer_stream *stream); | |
51 | ||
52 | /* | |
53 | * Get the produced position | |
54 | * | |
55 | * Returns 0 on success, < 0 on error | |
56 | */ | |
57 | int lttng_kconsumer_get_produced_snapshot( | |
58 | struct lttng_consumer_local_data *ctx, | |
59 | struct lttng_consumer_stream *stream, | |
60 | unsigned long *pos); | |
61 | ||
62 | int lttng_kconsumer_recv_cmd(struct lttng_consumer_local_data *ctx, | |
63 | int sock, struct pollfd *consumer_sockpoll); | |
64 | ||
d41f73b7 | 65 | |
4078b776 | 66 | ssize_t lttng_kconsumer_read_subbuffer(struct lttng_consumer_stream *stream, |
d41f73b7 MD |
67 | struct lttng_consumer_local_data *ctx); |
68 | int lttng_kconsumer_on_recv_stream(struct lttng_consumer_stream *stream); | |
69 | ||
3bd1e081 | 70 | #endif /* _LTTNG_KCONSUMER_H */ |