X-Git-Url: https://git.lttng.org/?a=blobdiff_plain;f=src%2Fbin%2Flttng-sessiond%2Fkernel.c;h=d9e047fc3f5cdcc50a72ea68d0a7f29fa49b159b;hb=af87c45a6179026e263c3a9eb251ccf8ec9537e7;hp=2ebd5acbdd79dec5f7441362ccf89bd925c74c95;hpb=990570edd474b304d4c935d82be6201d872025e4;p=lttng-tools.git

diff --git a/src/bin/lttng-sessiond/kernel.c b/src/bin/lttng-sessiond/kernel.c
index 2ebd5acbd..d9e047fc3 100644
--- a/src/bin/lttng-sessiond/kernel.c
+++ b/src/bin/lttng-sessiond/kernel.c
@@ -24,11 +24,11 @@
 #include <string.h>
 #include <unistd.h>
 
-#include <common/kernel-ctl/kernel-ctl.h>
-#include <common/lttngerr.h>
 #include <common/common.h>
+#include <common/kernel-ctl/kernel-ctl.h>
 
 #include "kernel.h"
+#include "kern-modules.h"
 
 /*
  * Add context on a kernel channel.
@@ -607,3 +607,34 @@ error_fp:
 error:
 	return -1;
 }
+
+/*
+ * Get kernel version and validate it.
+ */
+int kernel_validate_version(int tracer_fd)
+{
+	int ret;
+	struct lttng_kernel_tracer_version version;
+
+	ret = kernctl_tracer_version(tracer_fd, &version);
+	if (ret < 0) {
+		ERR("Failed at getting the lttng-modules version");
+		goto error;
+	}
+
+	/* Validate version */
+	if (version.version > KERN_MODULES_VERSION) {
+		goto error_version;
+	}
+
+	DBG2("Kernel tracer version validated (major version %d)", version.version);
+	return 0;
+
+error_version:
+	ERR("Kernel major version %d is not compatible (supporting <= %d)",
+			version.version, KERN_MODULES_VERSION)
+	ret = -1;
+
+error:
+	return ret;
+}