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/*
* 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 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#ifndef _SYS__MD_SP_H
#define _SYS__MD_SP_H
#include <sys/lvm/mdvar.h>
#ifdef __cplusplus
extern "C" {
#endif
#define META_SP_DEBUG ("META_SP_DEBUG")
/* on-disk structures */
#define MD_SP_MAGIC (0x20000127)
/* number of sectors to reserve at the beginning of the volume */
#define MD_SP_START (0)
/* current watermark version number */
#define MD_SP_VERSION (1)
/* size of a watermark in sectors */
#define MD_SP_WMSIZE (1)
/* free watermark name */
#define MD_SP_FREEWMNAME "free"
/* local set name */
#define MD_SP_LOCALSETNAME ""
/* maximum length of a soft partition metadevice name. eg. dXXXX\0 */
#define MD_SP_MAX_DEVNAME_PLUS_1 (6)
/*
* The size of this structure is forced to be 512 bytes (ie a sector) by
* using a union. Note the MD_MAX_SETNAME_PLUS_1 is set in meta_basic.h
*/
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack(4)
#endif
typedef union mp_watermark {
struct {
uint32_t wm_magic; /* magic number */
uint32_t wm_version; /* version number */
uint32_t wm_checksum; /* structure checksum */
uint32_t wm_seq; /* sequence number */
uint32_t wm_type; /* extent type */
uint64_t wm_length; /* length of extent */
char wm_mdname[MD_MAX_SETNAME_PLUS_1 +
MD_SP_MAX_DEVNAME_PLUS_1]; /* SP name */
char wm_setname[MD_MAX_SETNAME_PLUS_1]; /* setname */
} wm;
uchar_t wm_pad[MD_SP_WMSIZE * DEV_BSIZE];
} mp_watermark_t;
#if _LONG_LONG_ALIGNMENT == 8 && _LONG_LONG_ALIGNMENT_32 == 4
#pragma pack()
#endif
#define wm_magic wm.wm_magic
#define wm_version wm.wm_version
#define wm_checksum wm.wm_checksum
#define wm_seq wm.wm_seq
#define wm_type wm.wm_type
#define wm_length wm.wm_length
#define wm_mdname wm.wm_mdname
#define wm_setname wm.wm_setname
/* Watermark types */
typedef enum sp_ext_type {
EXTTYP_ALLOC = 0x1, /* this extent is in use by a soft partition */
EXTTYP_FREE = 0x2, /* extent is not in use */
EXTTYP_END = 0x3, /* last descriptor on the volume */
EXTTYP_RESERVED = 0x4 /* extent will not be used or updated */
} sp_ext_type_t;
/* ioctls */
#define MD_IOC_SPSTATUS (MDIOC_MISC|0)
#define MD_IOC_SPUPDATEWM (MDIOC_MISC|1)
#define MD_IOC_SPREADWM (MDIOC_MISC|2)
#define MD_MN_IOC_SPUPDATEWM (MDIOC_MISC|3)
#ifdef _KERNEL
/*
* parent and child save areas provide the mechanism for tracking
* I/O operations in the metadevice stack.
*/
/* soft partitioning parent save area */
typedef struct md_spps { /* soft partition parent save */
DAEMON_QUEUE
mp_unit_t *ps_un; /* sp unit structure */
mdi_unit_t *ps_ui; /* incore unit struct */
buf_t *ps_bp; /* parent buffer */
caddr_t ps_addr;
int ps_frags;
int ps_flags;
/*
* New structure members should be added here; fields added
* after ps_mx will not be zeroed during initialization.
*/
kmutex_t ps_mx;
} md_spps_t;
/* parent save flags. */
#define MD_SPPS_ERROR 0x0001
#define MD_SPPS_DONTFREE 0x0002
#define MD_SPPS_DONE 0x0004
/* soft partitioning child save area */
typedef struct md_spcs {
DAEMON_QUEUE
minor_t cs_mdunit; /* child minor number */
md_spps_t *cs_ps; /* parent save pointer */
/* Add new structure members HERE!! */
buf_t cs_buf; /* child buffer */
/* DO NOT add struture members here; cs_buf is dynamically sized */
} md_spcs_t;
#define SPPS_FREE(kc, ps) \
{ \
if ((ps)->ps_flags & MD_SPPS_DONTFREE) \
(ps)->ps_flags |= MD_SPPS_DONE; \
else \
kmem_cache_free((kc), (ps)); \
}
/* externals from sp.c */
extern int sp_build_incore(void *, int);
extern void reset_sp(mp_unit_t *, minor_t, int);
extern int sp_directed_read(minor_t, vol_directed_rd_t *, int);
/* externals from sp_ioctl.c */
extern int md_sp_ioctl(dev_t dev, int cmd, void *data,
int mode, IOLOCK *lockp);
#endif /* _KERNEL */
#ifdef __cplusplus
}
#endif
#endif /* _SYS__MD_SP_H */
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