/*
 * 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 (c) 2010, Oracle and/or its affiliates. All rights reserved.
 */

#ifndef _BBLKEINFO_H
#define _BBLKEINFO_H

#ifdef  __cplusplus
extern "C" {
#endif

#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <md5.h>

#define BBLK_EINFO_VERSION      (1)

#define EINFO_MAGIC             "EXTINFO"
#define EINFO_MAGIC_SIZE        (7)

#pragma pack(1)
typedef struct _extended_info {
        char            magic[EINFO_MAGIC_SIZE];
        uint8_t         version;
        uint8_t         flags;
        uint32_t        str_off;
        uint16_t        str_size;
        uint8_t         hash_type;
        uint32_t        hash_off;
        uint16_t        hash_size;
        char            rsvd[32];
} bblk_einfo_t;
#pragma pack()

enum bblk_hash_types_t {
        BBLK_NO_HASH = 0,
        BBLK_HASH_MD5,
        BBLK_HASH_TOT
};

#define EINFO_PRINT_HEADER      0x01
#define EINFO_EASY_PARSE        0x02

typedef struct _hashing_function {
        unsigned int    type;
        unsigned int    size;
        char            name[16];
        void            (*compute_hash)(void *, const void *, unsigned int);
} bblk_hash_t;

typedef struct _hashing_source {
        unsigned char   *src_buf;
        unsigned int    src_size;
} bblk_hs_t;

#define BBLK_DEFAULT_HASH       BBLK_HASH_MD5

extern bblk_hash_t      bblk_no_hash;
extern bblk_hash_t      bblk_md5_hash;
extern bblk_hash_t      *bblk_hash_list[BBLK_HASH_TOT];

void print_einfo(uint8_t, bblk_einfo_t *, unsigned long);
int prepare_and_write_einfo(unsigned char *, char *, bblk_hs_t *,
    uint32_t, uint32_t *);
boolean_t einfo_should_update(bblk_einfo_t *, bblk_hs_t *, char *);
char *einfo_get_string(bblk_einfo_t *);
char *einfo_get_hash(bblk_einfo_t *);

#ifdef  __cplusplus
}
#endif

#endif /* _BBLKEINFO_H */