sys/lvm/md_stripe.h

	md_stripe.h revision 7c478bd95313f5f23a4c958a745db2134aa03244
/*
 * 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_STRIPE_H
#define _SYS__MD_STRIPE_H

#pragma ident   "%Z%%M% %I% %E% SMI"

#include <sys/lvm/mdvar.h>
#include <sys/lvm/md_mirror_shared.h>
#include <sys/lvm/md_rename.h>

#ifdef  __cplusplus
extern "C" {
#endif

/*
 * ms_comp32_od is for old 32 bit format only
 */
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack(4)
#endif
typedef struct ms_comp32_od {
    mdkey_t     un_key;
    dev32_t     un_dev;
    daddr32_t   un_start_block; /* comp start blkno */
    md_m_shared32_od_t un_mirror;
} ms_comp32_od_t;


typedef struct ms_comp {    /* components */
    mdkey_t     un_key;     /* namespace key */
    md_dev64_t  un_dev;     /* device number, 64 bit */
    diskaddr_t  un_start_block; /* comp start blkno */
    md_m_shared_t   un_mirror;  /* mirror shared data */
} ms_comp_t;
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack()
#endif

/*
 * ms_unit32_od is for old 32 bit format only
 */
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack(4)
#endif
typedef struct ms_unit32_od {
    mdc_unit32_od_t c;
    int     un_hsp_id;  /* hot spare pool db record id */
    uint_t      un_nrows;   /* number of rows */
    uint_t      un_ocomp;   /* offset of  ms_comp array  */
    struct ms_row32_od {
        int un_icomp;   /* ms_comp array index of first comp */
        uint_t  un_ncomp;   /* # comps in this row */
        int un_blocks;  /* total blocks in this row */
        int un_cum_blocks;  /* cum. blks in this and prev. rows */
        int un_interlace;   /* # blks from each disk in a stripe */
    }un_row[1];
} ms_unit32_od_t;


typedef struct ms_unit {
    mdc_unit_t  c;
    int     un_hsp_id;  /* hot spare pool db record id */
    uint_t      un_nrows;   /* number of rows */
    uint_t      un_ocomp;   /* offset of  ms_comp array  */
    struct ms_row {
        int un_icomp;   /* ms_comp array index of first comp */
        uint_t  un_ncomp;   /* # comps in this row */
        diskaddr_t un_blocks;   /* total blocks in this row */
        diskaddr_t un_cum_blocks;   /* cum. blks in rows */
        diskaddr_t un_interlace;    /* # blks from each disk */
    }un_row[1];
} ms_unit_t;
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack()
#endif

#ifdef _KERNEL

typedef struct md_sps {         /* stripe parent save */
    DAEMON_QUEUE
    ms_unit_t   *ps_un;
    mdi_unit_t  *ps_ui;
    buf_t       *ps_bp;
    caddr_t      ps_addr;
    int      ps_frags;
    int      ps_flags;
    ms_comp_t   *ps_errcomp;
    /*
     * New structure members should be added here; fields added
     * after ps_mx will not be zeroed during initialization.
     */
    kmutex_t     ps_mx;
} md_sps_t;

#define MD_SPS_ERROR        0x0001
#define MD_SPS_DONTFREE     0x0002
#define MD_SPS_DONE     0x0004

#define SPS_FREE(kc, ps)            \
{                       \
    if ((ps)->ps_flags & MD_SPS_DONTFREE)   \
        (ps)->ps_flags |= MD_SPS_DONE;  \
    else                    \
        kmem_cache_free((kc), (ps));    \
}

typedef struct md_scs {
    DAEMON_QUEUE
    minor_t      cs_mdunit;
    md_sps_t    *cs_ps;
    ms_comp_t   *cs_comp;
    /* Add new structure members HERE!! */
    buf_t        cs_buf;
    /*  DO NOT add struture members here; cs_buf is dynamically sized */
} md_scs_t;

/* Externals from stripe.c */
extern int  stripe_build_incore(void *, int);
extern void reset_stripe(ms_unit_t *, minor_t, int);
extern intptr_t stripe_component_count(md_dev64_t, void *);
extern intptr_t stripe_get_dev(md_dev64_t, void *, int, ms_cd_info_t *);
extern intptr_t stripe_replace_dev(md_dev64_t, void *, int, ms_new_dev_t *,
    mddb_recid_t *, int, void (**)(), void **);
extern void stripe_replace_done(md_dev64_t, sv_dev_t *);

/* Externals from stripe_ioctl.c */
extern int  md_stripe_ioctl(dev_t dev, int cmd, void *data,
            int mode, IOLOCK *lockp);

/* rename named service functions (stripe_ioctl.c) */
md_ren_svc_t    stripe_rename_check;

#endif  /* _KERNEL */

#ifdef  __cplusplus
}
#endif

#endif  /* _SYS__MD_STRIPE_H */