Add kernel trace data structure init functions

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

diff --git a/ltt-sessiond/trace.h b/ltt-sessiond/trace.h
index 36b2f2270eef69bedd70aa570027da7f61660f22..488fd757d3dfabf4d06a894ad2375876f6857cf6 100644 (file)
--- a/ltt-sessiond/trace.h
+++ b/ltt-sessiond/trace.h
@@ -19,18 +19,79 @@
 #ifndef _LTT_TRACE_H
 #define _LTT_TRACE_H
 
-#include "session.h"
+#include <limits.h>
+#include <urcu/list.h>
+#include "lttng-kernel.h"
 
-/* LTTng trace representation */
-struct ltt_lttng_trace {
+/* Default kernel channel attributes */
+#define DEFAULT_KERNEL_OVERWRITE            0
+#define DEFAULT_KERNEL_SUBBUF_SIZE          4096    /* bytes */
+#define DEFAULT_KERNEL_SUBBUF_NUM           8       /* Must always be a power of 2 */
+#define DEFAULT_KERNEL_SWITCH_TIMER         0       /* usec */
+#define DEFAULT_KERNEL_READ_TIMER           200     /* usec */
+
+/* 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;
+       struct lttng_kernel_event *event;
+       struct cds_list_head list;
+};
+
+/* Kernel channel */
+struct ltt_kernel_channel {
+       int fd;
+       char *pathname;
+       unsigned int stream_count;
+       struct lttng_kernel_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_kernel_channel *conf;
+};
+
+/* Channel stream */
+struct ltt_kernel_stream {
+       int fd;
+       char *pathname;
+       int state;
        struct cds_list_head list;
-       char trace_name[NAME_MAX];
-       struct cds_list_head marker_list;
+};
+
+/* Kernel session */
+struct ltt_kernel_session {
+       int fd;
+       int metadata_stream_fd;
+       unsigned int channel_count;
+       unsigned int stream_count_global;
+       struct ltt_kernel_metadata *metadata;
+       struct ltt_kernel_channel_list channel_list;
 };
 
 /* UST trace representation */
 struct ltt_ust_trace {
        struct cds_list_head list;
+       char name[NAME_MAX];
        int shmid;
        pid_t pid;
        struct cds_list_head markers;
@@ -42,6 +103,24 @@ struct ltt_ust_marker {
        char *channel;
 };
 
-struct ltt_ust_trace *find_session_ust_trace_by_pid(struct ltt_session *session, pid_t pid);
+/*
+ * Function prototype
+ */
+
+/* Kernel session */
+struct ltt_kernel_session *trace_create_kernel_session(void);
+
+/* Kernel channel */
+struct ltt_kernel_channel *trace_create_kernel_channel(void);
+
+/* Kernel event */
+struct ltt_kernel_event *trace_create_kernel_event(char *name,
+               enum lttng_kernel_instrumentation type);
+
+/* Kernel metadata */
+struct ltt_kernel_metadata *trace_create_kernel_metadata(void);
+
+/* Kernel stream */
+struct ltt_kernel_stream *trace_create_kernel_stream(void);
 
 #endif /* _LTT_TRACE_H */