src/common/ust-consumer/ust-consumer.h

   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 modify
   6  * it under the terms of the GNU General Public License, version 2 only,
   7  * as published by the Free Software Foundation.
   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
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  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.
  17  */
  18
  19 #ifndef _LTTNG_USTCONSUMER_H
  20 #define _LTTNG_USTCONSUMER_H
  21
  22 #include <errno.h>
  23
  24 #include <common/consumer/consumer.h>
  25 #include <stdbool.h>
  26
  27 #ifdef HAVE_LIBLTTNG_UST_CTL
  28
  29 int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream);
  30 int lttng_ustconsumer_sample_snapshot_positions(
  31                 struct lttng_consumer_stream *stream);
  32
  33 int lttng_ustconsumer_get_produced_snapshot(
  34                 struct lttng_consumer_stream *stream, unsigned long *pos);
  35 int lttng_ustconsumer_get_consumed_snapshot(
  36                 struct lttng_consumer_stream *stream, unsigned long *pos);
  37
  38 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
  39                 int sock, struct pollfd *consumer_sockpoll);
  40
  41 extern int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan);
  42 extern void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan);
  43 extern void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan);
  44 extern int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream);
  45 extern void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream);
  46
  47 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
  48                 struct lttng_consumer_local_data *ctx);
  49 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream);
  50
  51 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream);
  52
  53 void lttng_ustctl_flush_buffer(struct lttng_consumer_stream *stream,
  54                 int producer_active);
  55 int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
  56                 uint64_t *stream_id);
  57 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream);
  58 void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht);
  59 void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata);
  60 void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream);
  61 int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
  62                 uint64_t len, uint64_t version,
  63                 struct lttng_consumer_channel *channel, int timer, int wait);
  64 int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
  65                 struct lttng_consumer_channel *channel, int timer, int wait);
  66 enum sync_metadata_status lttng_ustconsumer_sync_metadata(
  67                 struct lttng_consumer_local_data *ctx,
  68                 struct lttng_consumer_stream *metadata);
  69 void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
  70                 int producer);
  71 int lttng_ustconsumer_get_current_timestamp(
  72                 struct lttng_consumer_stream *stream, uint64_t *ts);
  73 int lttng_ustconsumer_get_sequence_number(
  74                 struct lttng_consumer_stream *stream, uint64_t *seq);
  75
  76 #else /* HAVE_LIBLTTNG_UST_CTL */
  77
  78 static inline
  79 ssize_t lttng_ustconsumer_on_read_subbuffer_mmap(
  80                 struct lttng_consumer_local_data *ctx,
  81                 struct lttng_consumer_stream *stream, unsigned long len,
  82                 unsigned long padding)
  83 {
  84         return -ENOSYS;
  85 }
  86
  87 static inline
  88 ssize_t lttng_ustconsumer_on_read_subbuffer_splice(
  89                 struct lttng_consumer_local_data *ctx,
  90                 struct lttng_consumer_stream *uststream, unsigned long len,
  91                 unsigned long padding)
  92 {
  93         return -ENOSYS;
  94 }
  95
  96 static inline
  97 int lttng_ustconsumer_take_snapshot(struct lttng_consumer_stream *stream)
  98 {
  99         return -ENOSYS;
 100 }
 101
 102 static inline
 103 int lttng_ustconsumer_sample_snapshot_positions(
 104                 struct lttng_consumer_stream *stream)
 105 {
 106         return -ENOSYS;
 107 }
 108
 109 static inline
 110 int lttng_ustconsumer_get_produced_snapshot(
 111                 struct lttng_consumer_stream *stream, unsigned long *pos)
 112 {
 113         return -ENOSYS;
 114 }
 115
 116 static inline
 117 int lttng_ustconsumer_get_consumed_snapshot(
 118                 struct lttng_consumer_stream *stream, unsigned long *pos)
 119 {
 120         return -ENOSYS;
 121 }
 122
 123 static inline
 124 int lttng_ustconsumer_recv_cmd(struct lttng_consumer_local_data *ctx,
 125                 int sock, struct pollfd *consumer_sockpoll)
 126 {
 127         return -ENOSYS;
 128 }
 129
 130 static inline
 131 int lttng_ustconsumer_allocate_channel(struct lttng_consumer_channel *chan)
 132 {
 133         return -ENOSYS;
 134 }
 135
 136 static inline
 137 void lttng_ustconsumer_del_channel(struct lttng_consumer_channel *chan)
 138 {
 139 }
 140
 141 static inline
 142 void lttng_ustconsumer_free_channel(struct lttng_consumer_channel *chan)
 143 {
 144 }
 145
 146 static inline
 147 int lttng_ustconsumer_add_stream(struct lttng_consumer_stream *stream)
 148 {
 149         return -ENOSYS;
 150 }
 151
 152 static inline
 153 void lttng_ustconsumer_del_stream(struct lttng_consumer_stream *stream)
 154 {
 155 }
 156
 157 static inline
 158 int lttng_ustconsumer_read_subbuffer(struct lttng_consumer_stream *stream,
 159                 struct lttng_consumer_local_data *ctx)
 160 {
 161         return -ENOSYS;
 162 }
 163
 164 static inline
 165 int lttng_ustconsumer_on_recv_stream(struct lttng_consumer_stream *stream)
 166 {
 167         return -ENOSYS;
 168 }
 169
 170 static inline
 171 void lttng_ustconsumer_on_stream_hangup(struct lttng_consumer_stream *stream)
 172 {
 173 }
 174
 175 static inline
 176 int lttng_ustctl_get_mmap_read_offset(struct lttng_consumer_stream *stream,
 177                 unsigned long *off)
 178 {
 179         return -ENOSYS;
 180 }
 181 static inline
 182 int lttng_ustconsumer_data_pending(struct lttng_consumer_stream *stream)
 183 {
 184         return -ENOSYS;
 185 }
 186 static inline
 187 void *lttng_ustctl_get_mmap_base(struct lttng_consumer_stream *stream)
 188 {
 189         return NULL;
 190 }
 191 static inline
 192 void lttng_ustctl_flush_buffer(struct lttng_consumer_stream *stream,
 193                 int producer_active)
 194 {
 195 }
 196 static inline
 197 void lttng_ustconsumer_close_all_metadata(struct lttng_ht *ht)
 198 {
 199 }
 200 static inline
 201 void lttng_ustconsumer_close_metadata(struct lttng_consumer_channel *metadata)
 202 {
 203 }
 204 static inline
 205 void lttng_ustconsumer_close_stream_wakeup(struct lttng_consumer_stream *stream)
 206 {
 207 }
 208 static inline
 209 int lttng_ustconsumer_recv_metadata(int sock, uint64_t key, uint64_t offset,
 210                 uint64_t len, uint64_t version,
 211                 struct lttng_consumer_channel *channel, int timer)
 212 {
 213         return -ENOSYS;
 214 }
 215 static inline
 216 int lttng_ustconsumer_request_metadata(struct lttng_consumer_local_data *ctx,
 217                 struct lttng_consumer_channel *channel, int timer, int wait)
 218 {
 219         return -ENOSYS;
 220 }
 221 static inline
 222 enum sync_metadata_status lttng_ustconsumer_sync_metadata(struct lttng_consumer_local_data *ctx,
 223                 struct lttng_consumer_stream *metadata)
 224 {
 225         return SYNC_METADATA_STATUS_ERROR;
 226 }
 227 static inline
 228 void lttng_ustconsumer_flush_buffer(struct lttng_consumer_stream *stream,
 229                 int producer)
 230 {
 231 }
 232 static inline
 233 int lttng_ustconsumer_get_current_timestamp(
 234                 struct lttng_consumer_stream *stream, uint64_t *ts)
 235 {
 236         return -ENOSYS;
 237 }
 238 static inline
 239 int lttng_ustconsumer_get_sequence_number(
 240                 struct lttng_consumer_stream *stream, uint64_t *seq)
 241 {
 242         return -ENOSYS;
 243 }
 244 static inline
 245 int lttng_ustconsumer_get_stream_id(struct lttng_consumer_stream *stream,
 246                 uint64_t *stream_id)
 247 {
 248         return -ENOSYS;
 249 }
 250 #endif /* HAVE_LIBLTTNG_UST_CTL */
 251
 252 #endif /* _LTTNG_USTCONSUMER_H */