Rename ltt-sessiond to lttng-sessiond

[lttng-tools.git] / lttng-sessiond / trace-kernel.h

diff --git a/lttng-sessiond/trace-kernel.h b/lttng-sessiond/trace-kernel.h
new file mode 100644 (file)
index 0000000..bcea651
--- /dev/null
+++ b/lttng-sessiond/trace-kernel.h
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; only version 2
+ * of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+
+#ifndef _LTT_TRACE_KERNEL_H
+#define _LTT_TRACE_KERNEL_H
+
+#include <limits.h>
+#include <urcu/list.h>
+
+#include <lttng/lttng.h>
+#include <lttng-kernel.h>
+
+/* Kernel event list */
+struct ltt_kernel_event_list {
+       struct cds_list_head head;
+};
+
+/* Channel stream list */
+struct ltt_kernel_stream_list {
+       struct cds_list_head head;
+};
+
+/* Channel list */
+struct ltt_kernel_channel_list {
+       struct cds_list_head head;
+};
+
+/* Kernel event */
+struct ltt_kernel_event {
+       int fd;
+       int enabled;
+       /*
+        * TODO: need internal representation to support more than a
+        * single context.
+        */
+       struct lttng_kernel_context *ctx;
+       struct lttng_kernel_event *event;
+       struct cds_list_head list;
+};
+
+/* Kernel channel */
+struct ltt_kernel_channel {
+       int fd;
+       int enabled;
+       char *pathname;
+       unsigned int stream_count;
+       unsigned int event_count;
+       /*
+        * TODO: need internal representation to support more than a
+        * single context.
+        */
+       struct lttng_kernel_context *ctx;
+       struct lttng_channel *channel;
+       struct ltt_kernel_event_list events_list;
+       struct ltt_kernel_stream_list stream_list;
+       struct cds_list_head list;
+};
+
+/* Metadata */
+struct ltt_kernel_metadata {
+       int fd;
+       char *pathname;
+       struct lttng_channel *conf;
+};
+
+/* Channel stream */
+struct ltt_kernel_stream {
+       int fd;
+       char *pathname;
+       int state;
+       struct cds_list_head list;
+};
+
+/* Kernel session */
+struct ltt_kernel_session {
+       int fd;
+       int metadata_stream_fd;
+       int consumer_fds_sent;
+       int consumer_fd;
+       unsigned int channel_count;
+       unsigned int stream_count_global;
+       char *trace_path;
+       struct ltt_kernel_metadata *metadata;
+       struct ltt_kernel_channel_list channel_list;
+};
+
+/*
+ * Lookup functions. NULL is returned if not found.
+ */
+struct ltt_kernel_event *trace_kernel_get_event_by_name(
+               char *name, struct ltt_kernel_channel *channel);
+struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
+               char *name, struct ltt_kernel_session *session);
+
+/*
+ * Create functions malloc() the data structure.
+ */
+struct ltt_kernel_session *trace_kernel_create_session(char *path);
+struct ltt_kernel_channel *trace_kernel_create_channel(struct lttng_channel *chan, char *path);
+struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev);
+struct ltt_kernel_metadata *trace_kernel_create_metadata(char *path);
+struct ltt_kernel_stream *trace_kernel_create_stream(void);
+
+/*
+ * Destroy functions free() the data structure and remove from linked list if
+ * it's applies.
+ */
+void trace_kernel_destroy_session(struct ltt_kernel_session *session);
+void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
+void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
+void trace_kernel_destroy_event(struct ltt_kernel_event *event);
+void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
+
+#endif /* _LTT_TRACE_KERNEL_H */