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-rw-r--r--drivers/md/dm-vdo/string-utils.c22
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/md/dm-vdo/string-utils.c b/drivers/md/dm-vdo/string-utils.c
new file mode 100644
index 0000000000..71e44b4683
--- /dev/null
+++ b/drivers/md/dm-vdo/string-utils.c
@@ -0,0 +1,22 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2023 Red Hat
+ */
+
+#include "string-utils.h"
+
+char *vdo_append_to_buffer(char *buffer, char *buf_end, const char *fmt, ...)
+{
+ va_list args;
+ size_t n;
+
+ va_start(args, fmt);
+ n = vsnprintf(buffer, buf_end - buffer, fmt, args);
+ if (n >= (size_t) (buf_end - buffer))
+ buffer = buf_end;
+ else
+ buffer += n;
+ va_end(args);
+
+ return buffer;
+}