--- /dev/null
+/*
+ * 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_UST_H
+#define _LTT_TRACE_UST_H
+
+#include <config.h>
+#include <limits.h>
+#include <urcu.h>
+#include <urcu/list.h>
+#include <lttng/lttng.h>
+
+#include "ust-ctl.h"
+
+#include "../hashtable/rculfhash.h"
+
+/* UST Stream list */
+struct ltt_ust_stream_list {
+ unsigned int count;
+ struct cds_list_head head;
+};
+
+/* Context hash table nodes */
+struct ltt_ust_context {
+ struct lttng_ust_context ctx;
+ struct cds_lfht_node node;
+};
+
+/* UST event */
+struct ltt_ust_event {
+ struct lttng_ust_event attr;
+ struct cds_lfht *ctx;
+ struct cds_lfht_node node;
+};
+
+/* UST stream */
+struct ltt_ust_stream {
+ int handle;
+ char pathname[PATH_MAX];
+ struct lttng_ust_object_data *obj;
+ struct cds_lfht_node node;
+};
+
+/* UST channel */
+struct ltt_ust_channel {
+ char name[LTTNG_UST_SYM_NAME_LEN];
+ char pathname[PATH_MAX];
+ struct lttng_ust_channel attr;
+ struct cds_lfht *ctx;
+ struct cds_lfht *events;
+ struct cds_lfht_node node;
+};
+
+/* UST Metadata */
+struct ltt_ust_metadata {
+ int handle;
+ struct lttng_ust_object_data *obj;
+ char pathname[PATH_MAX]; /* Trace file path name */
+ struct lttng_ust_channel attr;
+ struct lttng_ust_object_data *stream_obj;
+};
+
+/* UST domain global (LTTNG_DOMAIN_UST) */
+struct ltt_ust_domain_global {
+ struct cds_lfht *channels;
+};
+
+/* UST domain pid (LTTNG_DOMAIN_UST_PID) */
+struct ltt_ust_domain_pid {
+ pid_t pid;
+ struct cds_lfht *channels;
+ struct cds_lfht_node node;
+};
+
+/* UST domain exec name (LTTNG_DOMAIN_UST_EXEC_NAME) */
+struct ltt_ust_domain_exec {
+ char exec_name[LTTNG_UST_SYM_NAME_LEN];
+ struct cds_lfht *channels;
+ struct cds_lfht_node node;
+};
+
+/* UST session */
+struct ltt_ust_session {
+ int uid; /* Unique identifier of session */
+ int consumer_fds_sent;
+ int consumer_fd;
+ char pathname[PATH_MAX];
+ struct ltt_ust_domain_global domain_global;
+ /*
+ * Those two hash tables contains data for a specific UST domain and each
+ * contains a HT of channels. See ltt_ust_domain_exec and
+ * ltt_ust_domain_pid data structures.
+ */
+ struct cds_lfht *domain_pid;
+ struct cds_lfht *domain_exec;
+};
+
+#ifdef CONFIG_LTTNG_TOOLS_HAVE_UST
+
+/*
+ * Lookup functions. NULL is returned if not found.
+ */
+struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
+ char *name);
+struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
+ char *name);
+
+/*
+ * Create functions malloc() the data structure.
+ */
+struct ltt_ust_session *trace_ust_create_session(char *path, unsigned int uid,
+ struct lttng_domain *domain);
+struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
+ char *path);
+struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev);
+struct ltt_ust_metadata *trace_ust_create_metadata(char *path);
+
+/*
+ * Destroy functions free() the data structure and remove from linked list if
+ * it's applies.
+ */
+void trace_ust_destroy_session(struct ltt_ust_session *session);
+void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata);
+void trace_ust_destroy_channel(struct ltt_ust_channel *channel);
+void trace_ust_destroy_event(struct ltt_ust_event *event);
+
+#else
+
+static inline
+struct ltt_ust_event *trace_ust_find_event_by_name(struct cds_lfht *ht,
+ char *name)
+{
+ return NULL;
+}
+
+static inline
+struct ltt_ust_channel *trace_ust_find_channel_by_name(struct cds_lfht *ht,
+ char *name)
+{
+ return NULL;
+}
+
+static inline
+struct ltt_ust_session *trace_ust_create_session(char *path, pid_t pid,
+ struct lttng_domain *domain)
+{
+ return NULL;
+}
+static inline
+struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *attr,
+ char *path)
+{
+ return NULL;
+}
+static inline
+struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev)
+{
+ return NULL;
+}
+static inline
+struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
+{
+ return NULL;
+}
+
+static inline
+void trace_ust_destroy_session(struct ltt_ust_session *session)
+{
+}
+
+static inline
+void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
+{
+}
+
+static inline
+void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
+{
+}
+
+static inline
+void trace_ust_destroy_event(struct ltt_ust_event *event)
+{
+}
+
+#endif /* CONFIG_CONFIG_LTTNG_TOOLS_HAVE_UST */
+
+#endif /* _LTT_TRACE_UST_H */
projects / lttng-tools.git / blobdiff