1 files changed, 56 insertions, 0 deletions
diff --git a/src/tracefs-eprobes.c b/src/tracefs-eprobes.c
new file mode 100644
index 0000000..cc25f8e
--- /dev/null
+++ b/src/tracefs-eprobes.c
@@ -0,0 +1,56 @@
+// SPDX-License-Identifier: LGPL-2.1
+/*
+ * Copyright (C) 2021, VMware, Tzvetomir Stoyanov <tz.stoyanov@gmail.com>
+ *
+ */
+#include <stdlib.h>
+#include <errno.h>
+
+#include "tracefs.h"
+#include "tracefs-local.h"
+
+#define EPROBE_DEFAULT_GROUP "eprobes"
+
+/**
+ * tracefs_eprobe_alloc - Allocate new eprobe
+ * @system: The system name (NULL for the default eprobes)
+ * @event: The name of the event to create
+ * @target_system: The system of the target event
+ * @target_event: The name of the target event
+ * @fetchargs: String with arguments, that will be fetched from @target_event
+ *
+ * Allocate an eprobe context that will be in the @system group (or eprobes if
+ * @system is NULL). Have the name of @event. The new eprobe will be attached to
+ * given @target_event which is in the given @target_system. The arguments
+ * described in @fetchargs will fetched from the @target_event.
+ *
+ * The eprobe is not created in the system.
+ *
+ * Return a pointer to a eprobe context on success, or NULL on error.
+ * The returned pointer must be freed with tracefs_dynevent_free()
+ *
+ */
+struct tracefs_dynevent *
+tracefs_eprobe_alloc(const char *system, const char *event,
+		     const char *target_system, const char *target_event, const char *fetchargs)
+{
+	struct tracefs_dynevent *kp;
+	char *target;
+
+	if (!event || !target_system || !target_event) {
+		errno = EINVAL;
+		return NULL;
+	}
+
+	if (!system)
+		system = EPROBE_DEFAULT_GROUP;
+
+	if (asprintf(&target, "%s.%s", target_system, target_event) < 0)
+		return NULL;
+
+	kp = dynevent_alloc(TRACEFS_DYNEVENT_EPROBE, system, event, target, fetchargs);
+	free(target);
+
+	return kp;
+}
+