add cluster i/o pipeline

src/zstd.c

@@ -0,0 +1,30 @@
+#include "pipeline.h"
+
+#include <zstd.h>
+
+static enum ec3_status compress(
+	struct ec3_pipeline_stage *stage,
+	const void *src,
+	size_t len,
+	void *dest,
+	size_t *nr_written)
+{
+	*nr_written = ZSTD_compress(dest, len, src, len, 10);
+	return EC3_SUCCESS;
+}
+
+static enum ec3_status decompress(
+	struct ec3_pipeline_stage *stage,
+	const void *src,
+	void *dest,
+	size_t *nr_read)
+{
+	return EC3_SUCCESS;
+}
+
+const struct ec3_pipeline_stage_type pipeline_zstd = {
+	.t_id = EC3_PIPELINE_ZSTD,
+	.t_flags = EC3_PIPELINE_F_BUFFERED,
+	.t_data_in = decompress,
+	.t_data_out = compress,
+};