Fix: sessiond vs consumerd push/get metadata deadlock
[lttng-tools.git] / src / common / ust-consumer / ust-consumer.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 *
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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.
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8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
d14d33bf 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 * GNU General Public License for more details.
13 *
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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.
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17 */
18
19#ifndef _LTTNG_USTCONSUMER_H
20#define _LTTNG_USTCONSUMER_H
21
22#include <config.h>
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23#include <errno.h>
24
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25#include <common/consumer.h>
26
74d0b642 27#ifdef HAVE_LIBLTTNG_UST_CTL
3bd1e081 28
ffe60014 29int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream);
3bd1e081 30
3bd1e081 31int lttng_ustconsumer_get_produced_snapshot(
ffe60014 32 struct lttng_consumer_stream *stream, unsigned long *pos);
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33int lttng_ustconsumer_get_consumed_snapshot(
34 struct lttng_consumer_stream *stream, unsigned long *pos);
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35
36int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
37 int sock, struct pollfd *consumer_sockpoll);
38
39extern int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan);
40extern void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan);
e316aad5 41extern int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream);
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42extern void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream);
43
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44int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
45 struct lttng_consumer_local_data *ctx);
46int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream);
47
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48void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream);
49
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50int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
51 unsigned long *off);
52void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream);
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53int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
54 uint64_t *stream_id);
6d805429 55int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream);
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56void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht);
57void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata);
d8ef542d 58void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream);
331744e3 59int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
5e41ebe1 60 uint64_t len, struct lttng_consumer_channel *channel,
94d49140 61 int timer, int wait);
331744e3 62int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
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63 struct lttng_consumer_channel *channel, int timer, int wait);
64int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx,
65 struct lttng_consumer_stream *metadata);
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66void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
67 int producer);
68int lttng_ustconsumer_get_current_timestamp(
69 struct lttng_consumer_stream *stream, uint64_t *ts);
f02e1e8a 70
74d0b642 71#else /* HAVE_LIBLTTNG_UST_CTL */
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72
73static inline
4078b776 74ssize_t lttng_ustconsumer_on_read_subbuffer_mmap(
3bd1e081 75 struct lttng_consumer_local_data *ctx,
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76 struct lttng_consumer_stream *stream, unsigned long len,
77 unsigned long padding)
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78{
79 return -ENOSYS;
80}
81
82static inline
4078b776 83ssize_t lttng_ustconsumer_on_read_subbuffer_splice(
3bd1e081 84 struct lttng_consumer_local_data *ctx,
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85 struct lttng_consumer_stream *uststream, unsigned long len,
86 unsigned long padding)
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87{
88 return -ENOSYS;
89}
90
91static inline
ffe60014 92int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream)
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93{
94 return -ENOSYS;
95}
96
97static inline
98int lttng_ustconsumer_get_produced_snapshot(
ffe60014 99 struct lttng_consumer_stream *stream, unsigned long *pos)
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100{
101 return -ENOSYS;
102}
103
104static inline
105int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
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106 int sock, struct pollfd *consumer_sockpoll)
107{
108 return -ENOSYS;
109}
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110
111static inline
112int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan)
113{
114 return -ENOSYS;
115}
116
117static inline
118void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan)
119{
120}
121
122static inline
e316aad5 123int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream)
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124{
125 return -ENOSYS;
126}
127
128static inline
129void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream)
130{
131}
132
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133static inline
134int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
135 struct lttng_consumer_local_data *ctx)
136{
137 return -ENOSYS;
138}
139
140static inline
141int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
142{
143 return -ENOSYS;
144}
145
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146static inline
147void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream)
148{
149}
150
f02e1e8a 151static inline
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152int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
153 unsigned long *off)
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154{
155 return -ENOSYS;
156}
ca22feea 157static inline
6d805429 158int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream)
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159{
160 return -ENOSYS;
161}
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162static inline
163void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream)
164{
165 return NULL;
166}
d88aee68 167static inline
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168void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht)
169{
170}
171static inline
172void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata)
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173{
174}
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175static inline
176void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream)
177{
178}
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179static inline
180int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
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181 uint64_t len, struct lttng_consumer_channel *channel,
182 int timer)
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183{
184 return -ENOSYS;
185}
186static inline
ee69440b 187int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
84a182ce 188 struct lttng_consumer_channel *channel, int timer, int wait)
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189{
190 return -ENOSYS;
191}
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192static inline
193int lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx,
194 struct lttng_consumer_stream *metadata)
195{
196 return -ENOSYS;
197}
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198static inline
199void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
200 int producer)
201{
202}
203static inline
204int lttng_ustconsumer_get_current_timestamp(
205 struct lttng_consumer_stream *stream, uint64_t *ts)
206{
207 return -ENOSYS;
208}
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209static inline
210int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
211 uint64_t *stream_id)
212{
213 return -ENOSYS;
214}
74d0b642 215#endif /* HAVE_LIBLTTNG_UST_CTL */
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216
217#endif /* _LTTNG_USTCONSUMER_H */
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