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/* $OpenBSD: rf_disks.h,v 1.3 1999/07/30 14:45:32 peter Exp $ */
/* $NetBSD: rf_disks.h,v 1.4 1999/02/24 00:00:03 oster Exp $ */
/*
* Copyright (c) 1995 Carnegie-Mellon University.
* All rights reserved.
*
* Author: Mark Holland
*
* Permission to use, copy, modify and distribute this software and
* its documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie the
* rights to redistribute these changes.
*/
/*
* rf_disks.h -- header file for code related to physical disks
*/
#ifndef _RF__RF_DISKS_H_
#define _RF__RF_DISKS_H_
#include <sys/types.h>
#include "rf_archs.h"
#include "rf_types.h"
/*
* A physical disk can be in one of several states:
* IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK() BELOW.
*/
enum RF_DiskStatus_e {
rf_ds_optimal, /* no problems */
rf_ds_failed, /* reconstruction ongoing */
rf_ds_reconstructing, /* reconstruction complete to spare, dead disk
* not yet replaced */
rf_ds_dist_spared, /* reconstruction complete to distributed
* spare space, dead disk not yet replaced */
rf_ds_spared, /* reconstruction complete to distributed
* spare space, dead disk not yet replaced */
rf_ds_spare, /* an available spare disk */
rf_ds_used_spare /* a spare which has been used, and hence is
* not available */
};
typedef enum RF_DiskStatus_e RF_DiskStatus_t;
struct RF_RaidDisk_s {
char devname[56]; /* name of device file */
RF_DiskStatus_t status; /* whether it is up or down */
RF_RowCol_t spareRow; /* if in status "spared", this identifies the
* spare disk */
RF_RowCol_t spareCol; /* if in status "spared", this identifies the
* spare disk */
RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ
* CAPACITY */
int blockSize;
/* XXX the following is needed since we seem to need SIMULATE defined
* in order to get user-land stuff to compile, but we *don't* want this
* in the structure for the user-land utilities, as the kernel doesn't
* know about it!! (and it messes up the size of the structure, so
* there is a communication problem between the kernel and the
* userland utils :-( GO */
#if RF_KEEP_DISKSTATS > 0
RF_uint64 nreads;
RF_uint64 nwrites;
#endif /* RF_KEEP_DISKSTATS > 0 */
dev_t dev;
};
/*
* An RF_DiskOp_t ptr is really a pointer to a UAGT_CCB, but I want
* to isolate the cam layer from all other layers, so I typecast to/from
* RF_DiskOp_t * (i.e. void *) at the interfaces.
*/
typedef void RF_DiskOp_t;
/* if a disk is in any of these states, it is inaccessible */
#define RF_DEAD_DISK(_dstat_) (((_dstat_) == rf_ds_spared) || \
((_dstat_) == rf_ds_reconstructing) || ((_dstat_) == rf_ds_failed) || \
((_dstat_) == rf_ds_dist_spared))
int
rf_ConfigureDisks(RF_ShutdownList_t ** listp, RF_Raid_t * raidPtr,
RF_Config_t * cfgPtr);
int
rf_ConfigureSpareDisks(RF_ShutdownList_t ** listp, RF_Raid_t * raidPtr,
RF_Config_t * cfgPtr);
int
rf_ConfigureDisk(RF_Raid_t * raidPtr, char *buf, RF_RaidDisk_t * diskPtr,
RF_RowCol_t row, RF_RowCol_t col);
#endif /* !_RF__RF_DISKS_H_ */
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