1 files changed, 92 insertions, 0 deletions
diff --git a/include/zfs/zio.h b/include/zfs/zio.h
new file mode 100644
index 000000000..4adb14cb0
--- /dev/null
+++ b/include/zfs/zio.h
@@ -0,0 +1,92 @@
+/*
+ *  GRUB  --  GRand Unified Bootloader
+ *  Copyright (C) 1999,2000,2001,2002,2003,2004  Free Software Foundation, Inc.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+/*
+ * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
+ */
+
+#ifndef _ZIO_H
+#define	_ZIO_H
+
+#include <zfs/spa.h>
+
+#define	ZEC_MAGIC	0x210da7ab10c7a11ULL	/* zio data bloc tail */
+
+typedef struct zio_eck {
+	uint64_t	zec_magic;	/* for validation, endianness	*/
+	zio_cksum_t	zec_cksum;	/* 256-bit checksum		*/
+} zio_eck_t;
+
+/*
+ * Gang block headers are self-checksumming and contain an array
+ * of block pointers.
+ */
+#define	SPA_GANGBLOCKSIZE	SPA_MINBLOCKSIZE
+#define	SPA_GBH_NBLKPTRS	((SPA_GANGBLOCKSIZE - \
+	sizeof(zio_eck_t)) / sizeof(blkptr_t))
+#define	SPA_GBH_FILLER		((SPA_GANGBLOCKSIZE - \
+	sizeof(zio_eck_t) - \
+	(SPA_GBH_NBLKPTRS * sizeof(blkptr_t))) /\
+	sizeof(uint64_t))
+
+#define	ZIO_GET_IOSIZE(zio)	\
+	(BP_IS_GANG((zio)->io_bp) ? \
+	SPA_GANGBLOCKSIZE : BP_GET_PSIZE((zio)->io_bp))
+
+typedef struct zio_gbh {
+	blkptr_t		zg_blkptr[SPA_GBH_NBLKPTRS];
+	uint64_t		zg_filler[SPA_GBH_FILLER];
+	zio_eck_t		zg_tail;
+} zio_gbh_phys_t;
+
+enum zio_checksum {
+	ZIO_CHECKSUM_INHERIT = 0,
+	ZIO_CHECKSUM_ON,
+	ZIO_CHECKSUM_OFF,
+	ZIO_CHECKSUM_LABEL,
+	ZIO_CHECKSUM_GANG_HEADER,
+	ZIO_CHECKSUM_ZILOG,
+	ZIO_CHECKSUM_FLETCHER_2,
+	ZIO_CHECKSUM_FLETCHER_4,
+	ZIO_CHECKSUM_SHA256,
+	ZIO_CHECKSUM_ZILOG2,
+	ZIO_CHECKSUM_FUNCTIONS
+};
+
+#define	ZIO_CHECKSUM_ON_VALUE	ZIO_CHECKSUM_FLETCHER_2
+#define	ZIO_CHECKSUM_DEFAULT	ZIO_CHECKSUM_ON
+
+enum zio_compress {
+	ZIO_COMPRESS_INHERIT = 0,
+	ZIO_COMPRESS_ON,
+	ZIO_COMPRESS_OFF,
+	ZIO_COMPRESS_LZJB,
+	ZIO_COMPRESS_EMPTY,
+	ZIO_COMPRESS_GZIP1,
+	ZIO_COMPRESS_GZIP2,
+	ZIO_COMPRESS_GZIP3,
+	ZIO_COMPRESS_GZIP4,
+	ZIO_COMPRESS_GZIP5,
+	ZIO_COMPRESS_GZIP6,
+	ZIO_COMPRESS_GZIP7,
+	ZIO_COMPRESS_GZIP8,
+	ZIO_COMPRESS_GZIP9,
+	ZIO_COMPRESS_FUNCTIONS
+};
+
+#endif	/* _ZIO_H */