1 files changed, 97 insertions, 0 deletions
diff --git a/usr/src/uts/common/sys/lvm/md_crc.h b/usr/src/uts/common/sys/lvm/md_crc.h
new file mode 100644
index 0000000000..082ddd289c
--- /dev/null
+++ b/usr/src/uts/common/sys/lvm/md_crc.h
@@ -0,0 +1,97 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License, Version 1.0 only
+ * (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 2004 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#ifndef _SYS_MD_CRC_H
+#define	_SYS_MD_CRC_H
+
+#pragma ident	"%Z%%M%	%I%	%E% SMI"
+
+#include <sys/types.h>
+
+#ifdef	__cplusplus
+extern "C" {
+#endif
+
+/* md_crc.c */
+/*
+ * Structure to hold fields to be skipped when calculating the checksum
+ */
+typedef struct crc_skip {
+	struct crc_skip	*skip_next;
+	int		skip_offset;
+	int		skip_size;
+} crc_skip_t;
+
+extern uint_t			crcfunc(uint_t check,
+				    uchar_t *record,
+				    uint_t *result,
+				    size_t size,
+				    crc_skip_t *skip);
+extern void			crcfreetab(void);
+
+/*
+ * The following crc defines allow for a number of areas to be skipped
+ * (not be included in the data being crc'd) in the record
+ * block (mddb_rb_32). These areas are the 12 byte area covering
+ *	rb_checksum_fiddle, rb_private and rb_userdata
+ *
+ * In addition the skipped areas include the timestamps in the crc for
+ * MN disksets.
+ */
+#ifndef DEBUG
+#define	crcgen(record, result, size, skip) \
+	(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
+	    (size_t)(size), (crc_skip_t *)(skip))
+
+#else /* DEBUG */
+
+#ifdef	_KERNEL
+#define	crcgen(record, result, size, skip)		{\
+	uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
+	    (size_t)(size), (crc_skip_t *)(skip)); \
+	(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
+	    (size_t)(size), (crc_skip_t *)(skip)); \
+	ASSERT (*((uint_t *)(result)) == b); \
+}
+#else	/* !_KERNEL */
+#define	crcgen(record, result, size, skip)		{\
+	uint_t b = crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
+	    (size_t)(size), (crc_skip_t *)(skip)); \
+	(void) crcfunc(0, (uchar_t *)(record), (uint_t *)(result), \
+	    (size_t)(size), (crc_skip_t *)(skip)); \
+	assert (*((uint_t *)(result)) == b); \
+}
+#endif	/* _KERNEL */
+#endif	/* DEBUG */
+
+#define	crcchk(record, result, size, skip) crcfunc(1, (uchar_t *)(record), \
+	(uint_t *)(result), (size_t)(size), (crc_skip_t *)(skip))
+
+#ifdef	__cplusplus
+}
+#endif
+
+#endif	/* _SYS_MD_CRC_H */