src/bin/lttng-sessiond/kernel.h

   1 /*
   2  * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
   3  *
   4  * This program is free software; you can redistribute it and/or
   5  * modify it under the terms of the GNU General Public License
   6  * as published by the Free Software Foundation; only version 2
   7  * of the License.
   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
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  17  */
  18
  19 #ifndef _LTT_KERNEL_CTL_H
  20 #define _LTT_KERNEL_CTL_H
  21
  22 #include "session.h"
  23 #include "trace-kernel.h"
  24
  25 /*
  26  * Default size for the event list when kernel_list_events is called. This size
  27  * value is based on the initial LTTng 2.0 version set of tracepoints.
  28  *
  29  * This is NOT an upper bound because if the real event list size is bigger,
  30  * dynamic reallocation is performed.
  31  */
  32 #define KERNEL_EVENT_INIT_LIST_SIZE 64
  33
  34 int kernel_add_channel_context(struct ltt_kernel_channel *chan,
  35                 struct lttng_kernel_context *ctx);
  36 int kernel_add_event_context(struct ltt_kernel_event *event,
  37                 struct lttng_kernel_context *ctx);
  38 int kernel_create_session(struct ltt_session *session, int tracer_fd);
  39 int kernel_create_channel(struct ltt_kernel_session *session,
  40                 struct lttng_channel *chan, char *path);
  41 int kernel_create_event(struct lttng_event *ev, struct ltt_kernel_channel *channel);
  42 int kernel_disable_channel(struct ltt_kernel_channel *chan);
  43 int kernel_disable_event(struct ltt_kernel_event *event);
  44 int kernel_enable_event(struct ltt_kernel_event *event);
  45 int kernel_enable_channel(struct ltt_kernel_channel *chan);
  46 int kernel_open_metadata(struct ltt_kernel_session *session, char *path);
  47 int kernel_open_metadata_stream(struct ltt_kernel_session *session);
  48 int kernel_open_channel_stream(struct ltt_kernel_channel *channel);
  49 int kernel_flush_buffer(struct ltt_kernel_channel *channel);
  50 int kernel_metadata_flush_buffer(int fd);
  51 int kernel_start_session(struct ltt_kernel_session *session);
  52 int kernel_stop_session(struct ltt_kernel_session *session);
  53 ssize_t kernel_list_events(int tracer_fd, struct lttng_event **event_list);
  54 void kernel_wait_quiescent(int fd);
  55 int kernel_calibrate(int fd, struct lttng_kernel_calibrate *calibrate);
  56 int kernel_validate_version(int tracer_fd);
  57
  58 int init_kernel_workarounds(void);
  59
  60 #endif /* _LTT_KERNEL_CTL_H */