sessiond: lttng: Add command to check kernel tracer status

[lttng-tools.git] / include / lttng / kernel.h

diff --git a/include/lttng/kernel.h b/include/lttng/kernel.h
new file mode 100644 (file)
index 0000000..d3a9f05
--- /dev/null
+++ b/include/lttng/kernel.h
@@ -0,0 +1,44 @@
+/*
+ * kernel.h
+ *
+ * Linux Trace Toolkit Control Library Header File
+ *
+ * Copyright (C) 2023 Kienan Stewart <kstewart@efficios.com>
+ *
+ * SPDX-License-Identifier; LGPL-2.1-only
+ *
+ */
+
+#ifndef LTTNG_KERNEL_H
+#define LTTNG_KERNEL_H
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+enum lttng_kernel_tracer_status {
+       /* Loaded without error. */
+       LTTNG_KERNEL_TRACER_STATUS_INITIALIZED = 0,
+       /* Unknown error. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_UNKNOWN = -1,
+       /* lttng-sessiond isn't running as root. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_NEED_ROOT = -2,
+       /* Notifier setup failed. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_NOTIFIER = -3,
+       /* Failed to open /proc/lttng. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_OPEN_PROC_LTTNG = -4,
+       /* Version mismatch between kernel tracer and kernel tracer ABI. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_VERSION_MISMATCH = -5,
+       /* Kernel module loading failed. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_UNKNOWN = -6,
+       /* Kernel modules missing. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_MISSING = -7,
+       /* Kernel module signature error. */
+       LTTNG_KERNEL_TRACER_STATUS_ERR_MODULES_SIGNATURE = -8,
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* LTTNG_KERNEL_H */