zfs/lib/libzpool/include/sys/zio_checksum.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 #ifndef _SYS_ZIO_CHECKSUM_H
  27 #define _SYS_ZIO_CHECKSUM_H
  28
  29 #include <sys/zio.h>
  30
  31 #ifdef  __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 /*
  36  * Signature for checksum functions.
  37  */
  38 typedef void zio_checksum_t(const void *data, uint64_t size, zio_cksum_t *zcp);
  39
  40 /*
  41  * Information about each checksum function.
  42  */
  43 typedef struct zio_checksum_info {
  44         zio_checksum_t  *ci_func[2]; /* checksum function for each byteorder */
  45         int             ci_correctable; /* number of correctable bits   */
  46         int             ci_zbt;         /* uses zio block tail? */
  47         char            *ci_name;       /* descriptive name */
  48 } zio_checksum_info_t;
  49
  50 extern zio_checksum_info_t zio_checksum_table[ZIO_CHECKSUM_FUNCTIONS];
  51
  52 /*
  53  * Checksum routines.
  54  */
  55 extern zio_checksum_t fletcher_2_native;
  56 extern zio_checksum_t fletcher_4_native;
  57 extern zio_checksum_t fletcher_4_incremental_native;
  58
  59 extern zio_checksum_t fletcher_2_byteswap;
  60 extern zio_checksum_t fletcher_4_byteswap;
  61 extern zio_checksum_t fletcher_4_incremental_byteswap;
  62
  63 extern zio_checksum_t zio_checksum_SHA256;
  64
  65 extern void zio_checksum_compute(zio_t *zio, enum zio_checksum checksum,
  66     void *data, uint64_t size);
  67 extern int zio_checksum_error(zio_t *zio);
  68
  69 #ifdef  __cplusplus
  70 }
  71 #endif
  72
  73 #endif  /* _SYS_ZIO_CHECKSUM_H */