/*
 *  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 2010 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2012 by Delphix. All rights reserved.
 */

#ifndef _SYS_DMU_H
#define _SYS_DMU_H

/*
 * This file describes the interface that the DMU provides for its
 * consumers.
 *
 * The DMU also interacts with the SPA.  That interface is described in
 * dmu_spa.h.
 */

#define B_FALSE 0
#define B_TRUE  1

#define DMU_OT_NEWTYPE 0x80
#define DMU_OT_METADATA 0x40
#define DMU_OT_BYTESWAP_MASK 0x3f

#define DMU_OT(byteswap, metadata) \
        (DMU_OT_NEWTYPE | \
        ((metadata) ? DMU_OT_METADATA : 0) | \
        ((byteswap) & DMU_OT_BYTESWAP_MASK))

#define DMU_OT_IS_VALID(ot) (((ot) & DMU_OT_NEWTYPE) ? \
        ((ot) & DMU_OT_BYTESWAP_MASK) < DMU_BSWAP_NUMFUNCS : \
        (ot) < DMU_OT_NUMTYPES)

#define DMU_OT_IS_METADATA(ot) (((ot) & DMU_OT_NEWTYPE) ? \
        ((ot) & DMU_OT_METADATA) : \
        dmu_ot[(ot)].ot_metadata)

typedef enum dmu_object_byteswap {
        DMU_BSWAP_UINT8,
        DMU_BSWAP_UINT16,
        DMU_BSWAP_UINT32,
        DMU_BSWAP_UINT64,
        DMU_BSWAP_ZAP,
        DMU_BSWAP_DNODE,
        DMU_BSWAP_OBJSET,
        DMU_BSWAP_ZNODE,
        DMU_BSWAP_OLDACL,
        DMU_BSWAP_ACL,
        DMU_BSWAP_NUMFUNCS
} dmu_object_byteswap_t;

typedef enum dmu_object_type {
        DMU_OT_NONE,
        /* general: */
        DMU_OT_OBJECT_DIRECTORY,        /* ZAP */
        DMU_OT_OBJECT_ARRAY,            /* UINT64 */
        DMU_OT_PACKED_NVLIST,           /* UINT8 (XDR by nvlist_pack/unpack) */
        DMU_OT_PACKED_NVLIST_SIZE,      /* UINT64 */
        DMU_OT_BPOBJ,                   /* UINT64 */
        DMU_OT_BPOBJ_HDR,               /* UINT64 */
        /* spa: */
        DMU_OT_SPACE_MAP_HEADER,        /* UINT64 */
        DMU_OT_SPACE_MAP,               /* UINT64 */
        /* zil: */
        DMU_OT_INTENT_LOG,              /* UINT64 */
        /* dmu: */
        DMU_OT_DNODE,                   /* DNODE */
        DMU_OT_OBJSET,                  /* OBJSET */
        /* dsl: */
        DMU_OT_DSL_DIR,                 /* UINT64 */
        DMU_OT_DSL_DIR_CHILD_MAP,       /* ZAP */
        DMU_OT_DSL_DS_SNAP_MAP,         /* ZAP */
        DMU_OT_DSL_PROPS,               /* ZAP */
        DMU_OT_DSL_DATASET,             /* UINT64 */
        /* zpl: */
        DMU_OT_ZNODE,                   /* ZNODE */
        DMU_OT_OLDACL,                  /* Old ACL */
        DMU_OT_PLAIN_FILE_CONTENTS,     /* UINT8 */
        DMU_OT_DIRECTORY_CONTENTS,      /* ZAP */
        DMU_OT_MASTER_NODE,             /* ZAP */
        DMU_OT_UNLINKED_SET,            /* ZAP */
        /* zvol: */
        DMU_OT_ZVOL,                    /* UINT8 */
        DMU_OT_ZVOL_PROP,               /* ZAP */
        /* other; for testing only! */
        DMU_OT_PLAIN_OTHER,             /* UINT8 */
        DMU_OT_UINT64_OTHER,            /* UINT64 */
        DMU_OT_ZAP_OTHER,               /* ZAP */
        /* new object types: */
        DMU_OT_ERROR_LOG,               /* ZAP */
        DMU_OT_SPA_HISTORY,             /* UINT8 */
        DMU_OT_SPA_HISTORY_OFFSETS,     /* spa_his_phys_t */
        DMU_OT_POOL_PROPS,              /* ZAP */
        DMU_OT_DSL_PERMS,               /* ZAP */
        DMU_OT_ACL,                     /* ACL */
        DMU_OT_SYSACL,                  /* SYSACL */
        DMU_OT_FUID,                    /* FUID table (Packed NVLIST UINT8) */
        DMU_OT_FUID_SIZE,               /* FUID table size UINT64 */
        DMU_OT_NEXT_CLONES,             /* ZAP */
        DMU_OT_SCAN_QUEUE,              /* ZAP */
        DMU_OT_USERGROUP_USED,          /* ZAP */
        DMU_OT_USERGROUP_QUOTA,         /* ZAP */
        DMU_OT_USERREFS,                /* ZAP */
        DMU_OT_DDT_ZAP,                 /* ZAP */
        DMU_OT_DDT_STATS,               /* ZAP */
        DMU_OT_SA,                      /* System attr */
        DMU_OT_SA_MASTER_NODE,          /* ZAP */
        DMU_OT_SA_ATTR_REGISTRATION,    /* ZAP */
        DMU_OT_SA_ATTR_LAYOUTS,         /* ZAP */
        DMU_OT_SCAN_XLATE,              /* ZAP */
        DMU_OT_DEDUP,                   /* fake dedup BP from ddt_bp_create() */
        DMU_OT_DEADLIST,                /* ZAP */
        DMU_OT_DEADLIST_HDR,            /* UINT64 */
        DMU_OT_DSL_CLONES,              /* ZAP */
        DMU_OT_BPOBJ_SUBOBJ,            /* UINT64 */
        DMU_OT_NUMTYPES,

        DMU_OTN_UINT8_DATA = DMU_OT(DMU_BSWAP_UINT8, B_FALSE),
        DMU_OTN_UINT8_METADATA = DMU_OT(DMU_BSWAP_UINT8, B_TRUE),
        DMU_OTN_UINT16_DATA = DMU_OT(DMU_BSWAP_UINT16, B_FALSE),
        DMU_OTN_UINT16_METADATA = DMU_OT(DMU_BSWAP_UINT16, B_TRUE),
        DMU_OTN_UINT32_DATA = DMU_OT(DMU_BSWAP_UINT32, B_FALSE),
        DMU_OTN_UINT32_METADATA = DMU_OT(DMU_BSWAP_UINT32, B_TRUE),
        DMU_OTN_UINT64_DATA = DMU_OT(DMU_BSWAP_UINT64, B_FALSE),
        DMU_OTN_UINT64_METADATA = DMU_OT(DMU_BSWAP_UINT64, B_TRUE),
        DMU_OTN_ZAP_DATA = DMU_OT(DMU_BSWAP_ZAP, B_FALSE),
        DMU_OTN_ZAP_METADATA = DMU_OT(DMU_BSWAP_ZAP, B_TRUE),
} dmu_object_type_t;

typedef enum dmu_objset_type {
        DMU_OST_NONE,
        DMU_OST_META,
        DMU_OST_ZFS,
        DMU_OST_ZVOL,
        DMU_OST_OTHER,                  /* For testing only! */
        DMU_OST_ANY,                    /* Be careful! */
        DMU_OST_NUMTYPES
} dmu_objset_type_t;

/*
 * The names of zap entries in the DIRECTORY_OBJECT of the MOS.
 */
#define DMU_POOL_DIRECTORY_OBJECT       1
#define DMU_POOL_CONFIG                 "config"
#define DMU_POOL_FEATURES_FOR_READ      "features_for_read"
#define DMU_POOL_FEATURES_FOR_WRITE     "features_for_write"
#define DMU_POOL_FEATURE_DESCRIPTIONS   "feature_descriptions"
#define DMU_POOL_ROOT_DATASET           "root_dataset"
#define DMU_POOL_SYNC_BPLIST            "sync_bplist"
#define DMU_POOL_ERRLOG_SCRUB           "errlog_scrub"
#define DMU_POOL_ERRLOG_LAST            "errlog_last"
#define DMU_POOL_SPARES                 "spares"
#define DMU_POOL_DEFLATE                "deflate"
#define DMU_POOL_HISTORY                "history"
#define DMU_POOL_PROPS                  "pool_props"
#define DMU_POOL_L2CACHE                "l2cache"

#endif  /* _SYS_DMU_H */