X-Git-Url: https://git.camperquake.de/gitweb.cgi?a=blobdiff_plain;ds=sidebyside;f=include%2Fsys%2Fzio_compress.h;fp=include%2Fsys%2Fzio_compress.h;h=30bed1a676e32d73fd197715097d73830450e804;hb=6283f55ea1b91e680386388c17d14b89e344fa8d;hp=0000000000000000000000000000000000000000;hpb=5e6121455c0b941f4612ceb2c1f312d527534b46;p=zfs.git

diff --git a/include/sys/zio_compress.h b/include/sys/zio_compress.h
new file mode 100644
index 0000000..30bed1a
--- /dev/null
+++ b/include/sys/zio_compress.h
@@ -0,0 +1,84 @@
+/*
+ * 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 2009 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_ZIO_COMPRESS_H
+#define	_SYS_ZIO_COMPRESS_H
+
+#include <sys/zio.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/*
+ * Common signature for all zio compress/decompress functions.
+ */
+typedef size_t zio_compress_func_t(void *src, void *dst,
+    size_t s_len, size_t d_len, int);
+typedef int zio_decompress_func_t(void *src, void *dst,
+    size_t s_len, size_t d_len, int);
+
+/*
+ * Information about each compression function.
+ */
+typedef struct zio_compress_info {
+	zio_compress_func_t	*ci_compress;	/* compression function */
+	zio_decompress_func_t	*ci_decompress;	/* decompression function */
+	int			ci_level;	/* level parameter */
+	char			*ci_name;	/* algorithm name */
+} zio_compress_info_t;
+
+extern zio_compress_info_t zio_compress_table[ZIO_COMPRESS_FUNCTIONS];
+
+/*
+ * Compression routines.
+ */
+extern size_t lzjb_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int lzjb_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern size_t gzip_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int gzip_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern size_t zle_compress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+extern int zle_decompress(void *src, void *dst, size_t s_len, size_t d_len,
+    int level);
+
+/*
+ * Compress and decompress data if necessary.
+ */
+extern size_t zio_compress_data(enum zio_compress c, void *src, void *dst,
+    size_t s_len);
+extern int zio_decompress_data(enum zio_compress c, void *src, void *dst,
+    size_t s_len, size_t d_len);
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_ZIO_COMPRESS_H */