1 files changed, 106 insertions, 0 deletions
diff --git a/module/zfs/gzip.c b/module/zfs/gzip.c
new file mode 100644
index 000000000000..e2c6e59969d6
--- /dev/null
+++ b/module/zfs/gzip.c
@@ -0,0 +1,106 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+
+
+#include <sys/debug.h>
+#include <sys/types.h>
+#include <sys/strings.h>
+#include <sys/qat.h>
+#include <sys/zio_compress.h>
+
+#ifdef _KERNEL
+
+#include <sys/zmod.h>
+typedef size_t zlen_t;
+#define	compress_func	z_compress_level
+#define	uncompress_func	z_uncompress
+
+#else /* _KERNEL */
+
+#include <zlib.h>
+typedef uLongf zlen_t;
+#define	compress_func	compress2
+#define	uncompress_func	uncompress
+
+#endif
+
+size_t
+gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	int ret;
+	zlen_t dstlen = d_len;
+
+	ASSERT(d_len <= s_len);
+
+	/* check if hardware accelerator can be used */
+	if (qat_dc_use_accel(s_len)) {
+		ret = qat_compress(QAT_COMPRESS, s_start, s_len, d_start,
+		    d_len, &dstlen);
+		if (ret == CPA_STATUS_SUCCESS) {
+			return ((size_t)dstlen);
+		} else if (ret == CPA_STATUS_INCOMPRESSIBLE) {
+			if (d_len != s_len)
+				return (s_len);
+
+			bcopy(s_start, d_start, s_len);
+			return (s_len);
+		}
+		/* if hardware compression fails, do it again with software */
+	}
+
+	if (compress_func(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
+		if (d_len != s_len)
+			return (s_len);
+
+		bcopy(s_start, d_start, s_len);
+		return (s_len);
+	}
+
+	return ((size_t)dstlen);
+}
+
+/*ARGSUSED*/
+int
+gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
+{
+	zlen_t dstlen = d_len;
+
+	ASSERT(d_len >= s_len);
+
+	/* check if hardware accelerator can be used */
+	if (qat_dc_use_accel(d_len)) {
+		if (qat_compress(QAT_DECOMPRESS, s_start, s_len,
+		    d_start, d_len, &dstlen) == CPA_STATUS_SUCCESS)
+			return (0);
+		/* if hardware de-compress fail, do it again with software */
+	}
+
+	if (uncompress_func(d_start, &dstlen, s_start, s_len) != Z_OK)
+		return (-1);
+
+	return (0);
+}