161 lines
6.0 KiB
C
161 lines
6.0 KiB
C
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/* $NetBSD: rf_disks.h,v 1.1 1998/11/13 04:20:29 oster Exp $ */
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/*
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* Copyright (c) 1995 Carnegie-Mellon University.
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* All rights reserved.
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*
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* Author: Mark Holland
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*
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* Permission to use, copy, modify and distribute this software and
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* its documentation is hereby granted, provided that both the copyright
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* notice and this permission notice appear in all copies of the
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* software, derivative works or modified versions, and any portions
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* thereof, and that both notices appear in supporting documentation.
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*
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* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
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* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND
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* FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
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*
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* Carnegie Mellon requests users of this software to return to
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*
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* Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
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* School of Computer Science
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* Carnegie Mellon University
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* Pittsburgh PA 15213-3890
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*
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* any improvements or extensions that they make and grant Carnegie the
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* rights to redistribute these changes.
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*/
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/*
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* rf_disks.h -- header file for code related to physical disks
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*/
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/* :
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* Log: rf_disks.h,v
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* Revision 1.15 1996/08/20 23:05:13 jimz
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* add nreads, nwrites to RaidDisk
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*
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* Revision 1.14 1996/06/17 03:20:15 jimz
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* increase devname len to 56
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*
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* Revision 1.13 1996/06/10 11:55:47 jimz
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* Straightened out some per-array/not-per-array distinctions, fixed
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* a couple bugs related to confusion. Added shutdown lists. Removed
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* layout shutdown function (now subsumed by shutdown lists).
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*
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* Revision 1.12 1996/06/09 02:36:46 jimz
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* lots of little crufty cleanup- fixup whitespace
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* issues, comment #ifdefs, improve typing in some
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* places (esp size-related)
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*
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* Revision 1.11 1996/06/07 21:33:04 jimz
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* begin using consistent types for sector numbers,
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* stripe numbers, row+col numbers, recon unit numbers
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*
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* Revision 1.10 1996/05/30 11:29:41 jimz
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* Numerous bug fixes. Stripe lock release code disagreed with the taking code
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* about when stripes should be locked (I made it consistent: no parity, no lock)
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* There was a lot of extra serialization of I/Os which I've removed- a lot of
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* it was to calculate values for the cache code, which is no longer with us.
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* More types, function, macro cleanup. Added code to properly quiesce the array
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* on shutdown. Made a lot of stuff array-specific which was (bogusly) general
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* before. Fixed memory allocation, freeing bugs.
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*
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* Revision 1.9 1996/05/27 18:56:37 jimz
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* more code cleanup
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* better typing
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* compiles in all 3 environments
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*
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* Revision 1.8 1996/05/24 01:59:45 jimz
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* another checkpoint in code cleanup for release
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* time to sync kernel tree
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*
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* Revision 1.7 1996/05/18 19:51:34 jimz
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* major code cleanup- fix syntax, make some types consistent,
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* add prototypes, clean out dead code, et cetera
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*
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* Revision 1.6 1996/05/02 22:06:57 jimz
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* add RF_RaidDisk_t
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*
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* Revision 1.5 1995/12/01 15:56:53 root
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* added copyright info
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*
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*/
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#ifndef _RF__RF_DISKS_H_
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#define _RF__RF_DISKS_H_
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#include <sys/types.h>
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#include "rf_archs.h"
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#include "rf_types.h"
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#ifdef SIMULATE
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#include "rf_geometry.h"
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#endif /* SIMULATE */
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/*
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* A physical disk can be in one of several states:
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* IF YOU ADD A STATE, CHECK TO SEE IF YOU NEED TO MODIFY RF_DEAD_DISK() BELOW.
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*/
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enum RF_DiskStatus_e {
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rf_ds_optimal, /* no problems */
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rf_ds_failed, /* reconstruction ongoing */
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rf_ds_reconstructing, /* reconstruction complete to spare, dead disk not yet replaced */
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rf_ds_dist_spared, /* reconstruction complete to distributed spare space, dead disk not yet replaced */
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rf_ds_spared, /* reconstruction complete to distributed spare space, dead disk not yet replaced */
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rf_ds_spare, /* an available spare disk */
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rf_ds_used_spare /* a spare which has been used, and hence is not available */
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};
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typedef enum RF_DiskStatus_e RF_DiskStatus_t;
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struct RF_RaidDisk_s {
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char devname[56]; /* name of device file */
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RF_DiskStatus_t status; /* whether it is up or down */
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RF_RowCol_t spareRow; /* if in status "spared", this identifies the spare disk */
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RF_RowCol_t spareCol; /* if in status "spared", this identifies the spare disk */
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RF_SectorCount_t numBlocks; /* number of blocks, obtained via READ CAPACITY */
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int blockSize;
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/* XXX the folling is needed since we seem to need SIMULATE defined
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in order to get user-land stuff to compile, but we *don't* want
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this in the structure for the user-land utilities, as the
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kernel doesn't know about it!! (and it messes up the size of
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the structure, so there is a communication problem between
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the kernel and the userland utils :-( GO */
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#if defined(SIMULATE) && !defined(RF_UTILITY)
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RF_DiskState_t diskState; /* the name of the disk as used in the disk module */
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#endif /* SIMULATE */
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#if RF_KEEP_DISKSTATS > 0
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RF_uint64 nreads;
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RF_uint64 nwrites;
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#endif /* RF_KEEP_DISKSTATS > 0 */
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dev_t dev;
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};
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/*
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* An RF_DiskOp_t ptr is really a pointer to a UAGT_CCB, but I want
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* to isolate the cam layer from all other layers, so I typecast to/from
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* RF_DiskOp_t * (i.e. void *) at the interfaces.
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*/
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typedef void RF_DiskOp_t;
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/* if a disk is in any of these states, it is inaccessible */
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#define RF_DEAD_DISK(_dstat_) (((_dstat_) == rf_ds_spared) || \
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((_dstat_) == rf_ds_reconstructing) || ((_dstat_) == rf_ds_failed) || \
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((_dstat_) == rf_ds_dist_spared))
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int rf_ConfigureDisks(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
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RF_Config_t *cfgPtr);
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int rf_ConfigureSpareDisks(RF_ShutdownList_t **listp, RF_Raid_t *raidPtr,
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RF_Config_t *cfgPtr);
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int rf_ConfigureDisk(RF_Raid_t *raidPtr, char *buf, RF_RaidDisk_t *diskPtr,
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RF_DiskOp_t *rdcap_op, RF_DiskOp_t *tur_op, dev_t dev,
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RF_RowCol_t row, RF_RowCol_t col);
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#ifdef SIMULATE
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void rf_default_disk_names(void);
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void rf_set_disk_db_name(char *s);
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void rf_set_disk_type_name(char *s);
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#endif /* SIMULATE */
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#endif /* !_RF__RF_DISKS_H_ */
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