633 lines
18 KiB
C
633 lines
18 KiB
C
/* $NetBSD: rf_disks.c,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.c -- code to perform operations on the actual disks
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***************************************************************/
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/* :
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* Log: rf_disks.c,v
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* Revision 1.32 1996/07/27 18:40:24 jimz
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* cleanup sweep
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*
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* Revision 1.31 1996/07/22 19:52:16 jimz
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* switched node params to RF_DagParam_t, a union of
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* a 64-bit int and a void *, for better portability
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* attempted hpux port, but failed partway through for
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* lack of a single C compiler capable of compiling all
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* source files
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*
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* Revision 1.30 1996/07/19 16:11:21 jimz
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* pass devname to DoReadCapacity
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*
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* Revision 1.29 1996/07/18 22:57:14 jimz
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* port simulator to AIX
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*
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* Revision 1.28 1996/07/10 22:28:38 jimz
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* get rid of obsolete row statuses (dead,degraded2)
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*
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* Revision 1.27 1996/06/10 12:06:14 jimz
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* don't do any SCSI op stuff in simulator at all
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*
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* Revision 1.26 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 1.25 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 1.24 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 1.23 1996/06/03 23:28:26 jimz
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* more bugfixes
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* check in tree to sync for IPDS runs with current bugfixes
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* there still may be a problem with threads in the script test
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* getting I/Os stuck- not trivially reproducible (runs ~50 times
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* in a row without getting stuck)
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*
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* Revision 1.22 1996/06/02 17:31:48 jimz
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* Moved a lot of global stuff into array structure, where it belongs.
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* Fixed up paritylogging, pss modules in this manner. Some general
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* code cleanup. Removed lots of dead code, some dead files.
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*
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* Revision 1.21 1996/05/30 23:22:16 jimz
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* bugfixes of serialization, timing problems
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* more cleanup
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*
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* Revision 1.20 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 1.19 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 1.18 1996/05/24 22:17:04 jimz
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* continue code + namespace cleanup
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* typed a bunch of flags
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*
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* Revision 1.17 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 1.16 1996/05/23 21:46:35 jimz
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* checkpoint in code cleanup (release prep)
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* lots of types, function names have been fixed
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*
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* Revision 1.15 1996/05/23 00:33:23 jimz
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* code cleanup: move all debug decls to rf_options.c, all extern
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* debug decls to rf_options.h, all debug vars preceded by rf_
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*
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* Revision 1.14 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 1.13 1996/05/02 14:57:43 jimz
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* initialize sectorMask
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*
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* Revision 1.12 1995/12/01 15:57:04 root
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* added copyright info
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*
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*/
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#include "rf_types.h"
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#include "rf_raid.h"
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#include "rf_alloclist.h"
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#include "rf_utils.h"
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#include "rf_configure.h"
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#include "rf_general.h"
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#if !defined(__NetBSD__)
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#include "rf_camlayer.h"
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#endif
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#include "rf_options.h"
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#include "rf_sys.h"
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#if defined(__NetBSD__) && defined(_KERNEL)
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#include <sys/types.h>
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#include <sys/param.h>
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#include <sys/systm.h>
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#include <sys/proc.h>
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#include <sys/ioctl.h>
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#include <sys/fcntl.h>
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#include <sys/vnode.h>
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int raidlookup __P((char *, struct proc *p, struct vnode **));
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#endif
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#ifdef SIMULATE
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static char disk_db_file_name[120], disk_type_name[120];
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static double init_offset;
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#endif /* SIMULATE */
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#define DPRINTF6(a,b,c,d,e,f) if (rf_diskDebug) printf(a,b,c,d,e,f)
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#define DPRINTF7(a,b,c,d,e,f,g) if (rf_diskDebug) printf(a,b,c,d,e,f,g)
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#include "rf_ccmn.h"
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/****************************************************************************************
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*
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* initialize the disks comprising the array
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*
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* We want the spare disks to have regular row,col numbers so that we can easily
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* substitue a spare for a failed disk. But, the driver code assumes throughout
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* that the array contains numRow by numCol _non-spare_ disks, so it's not clear
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* how to fit in the spares. This is an unfortunate holdover from raidSim. The
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* quick and dirty fix is to make row zero bigger than the rest, and put all the
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* spares in it. This probably needs to get changed eventually.
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*
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***************************************************************************************/
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int rf_ConfigureDisks(
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RF_ShutdownList_t **listp,
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RF_Raid_t *raidPtr,
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RF_Config_t *cfgPtr)
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{
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RF_RaidDisk_t **disks;
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RF_SectorCount_t min_numblks = (RF_SectorCount_t)0x7FFFFFFFFFFFLL;
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RF_RowCol_t r, c;
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int bs, ret;
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unsigned i, count, foundone=0, numFailuresThisRow;
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RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
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int num_rows_done,num_cols_done;
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#if defined(__NetBSD__) && defined(_KERNEL)
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struct proc *proc = 0;
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#endif
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#ifndef SIMULATE
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#ifndef __NetBSD__
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ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
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if (ret)
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goto fail;
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ret = rf_SCSI_AllocTUR(&tur_op);
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if (ret)
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goto fail;
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#endif /* !__NetBSD__ */
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#endif /* !SIMULATE */
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num_rows_done = 0;
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num_cols_done = 0;
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RF_CallocAndAdd(disks, raidPtr->numRow, sizeof(RF_RaidDisk_t *), (RF_RaidDisk_t **), raidPtr->cleanupList);
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if (disks == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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raidPtr->Disks = disks;
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#if defined(__NetBSD__) && defined(_KERNEL)
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proc = raidPtr->proc; /* Blah XXX */
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/* get space for the device-specific stuff... */
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RF_CallocAndAdd(raidPtr->raid_cinfo, raidPtr->numRow,
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sizeof(struct raidcinfo *), (struct raidcinfo **),
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raidPtr->cleanupList);
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if (raidPtr->raid_cinfo == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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#endif
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for (r=0; r<raidPtr->numRow; r++) {
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numFailuresThisRow = 0;
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RF_CallocAndAdd(disks[r], raidPtr->numCol + ((r==0) ? raidPtr->numSpare : 0), sizeof(RF_RaidDisk_t), (RF_RaidDisk_t *), raidPtr->cleanupList);
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if (disks[r] == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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/* get more space for device specific stuff.. */
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RF_CallocAndAdd(raidPtr->raid_cinfo[r],
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raidPtr->numCol + ((r==0) ? raidPtr->numSpare : 0),
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sizeof(struct raidcinfo), (struct raidcinfo *),
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raidPtr->cleanupList);
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if (raidPtr->raid_cinfo[r] == NULL) {
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ret = ENOMEM;
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goto fail;
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}
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for (c=0; c<raidPtr->numCol; c++) {
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ret = rf_ConfigureDisk(raidPtr,&cfgPtr->devnames[r][c][0],
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&disks[r][c], rdcap_op, tur_op,
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cfgPtr->devs[r][c],r,c);
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if (ret)
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goto fail;
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if (disks[r][c].status != rf_ds_optimal) {
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numFailuresThisRow++;
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}
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else {
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if (disks[r][c].numBlocks < min_numblks)
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min_numblks = disks[r][c].numBlocks;
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DPRINTF7("Disk at row %d col %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n",
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r,c,disks[r][c].devname,
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(long int) disks[r][c].numBlocks,
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disks[r][c].blockSize,
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(long int) disks[r][c].numBlocks * disks[r][c].blockSize / 1024 / 1024);
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}
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num_cols_done++;
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}
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/* XXX fix for n-fault tolerant */
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if (numFailuresThisRow > 0)
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raidPtr->status[r] = rf_rs_degraded;
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num_rows_done++;
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}
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#ifndef SIMULATE
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#if defined(__NetBSD__) && defined(_KERNEL)
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/* we do nothing */
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#else
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rf_SCSI_FreeDiskOp(rdcap_op, 1); rdcap_op = NULL;
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rf_SCSI_FreeDiskOp(tur_op, 0); tur_op = NULL;
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#endif
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#endif /* !SIMULATE */
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/* all disks must be the same size & have the same block size, bs must be a power of 2 */
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bs = 0;
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for (foundone=r=0; !foundone && r<raidPtr->numRow; r++) {
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for (c=0; !foundone && c<raidPtr->numCol; c++) {
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if (disks[r][c].status == rf_ds_optimal) {
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bs = disks[r][c].blockSize;
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foundone = 1;
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}
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}
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}
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if (!foundone) {
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RF_ERRORMSG("RAIDFRAME: Did not find any live disks in the array.\n");
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ret = EINVAL;
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goto fail;
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}
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for (count=0,i=1; i; i<<=1) if (bs & i)
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count++;
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if (count != 1) {
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RF_ERRORMSG1("Error: block size on disks (%d) must be a power of 2\n",bs);
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ret = EINVAL;
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goto fail;
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}
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for (r=0; r<raidPtr->numRow; r++) {
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for (c=0; c<raidPtr->numCol; c++) {
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if (disks[r][c].status == rf_ds_optimal) {
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if (disks[r][c].blockSize != bs) {
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RF_ERRORMSG2("Error: block size of disk at r %d c %d different from disk at r 0 c 0\n",r,c);
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ret = EINVAL;
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goto fail;
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}
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if (disks[r][c].numBlocks != min_numblks) {
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RF_ERRORMSG3("WARNING: truncating disk at r %d c %d to %d blocks\n",
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r,c,(int) min_numblks);
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disks[r][c].numBlocks = min_numblks;
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}
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}
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}
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}
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raidPtr->sectorsPerDisk = min_numblks;
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raidPtr->logBytesPerSector = ffs(bs) - 1;
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raidPtr->bytesPerSector = bs;
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raidPtr->sectorMask = bs-1;
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return(0);
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fail:
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#ifndef SIMULATE
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#if defined(__NetBSD__) && defined(_KERNEL)
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for(r=0;r<raidPtr->numRow;r++) {
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for(c=0;c<raidPtr->numCol;c++) {
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/* Cleanup.. */
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#ifdef DEBUG
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printf("Cleaning up row: %d col: %d\n",r,c);
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#endif
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if (raidPtr->raid_cinfo[r][c].ci_vp) {
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(void)vn_close(raidPtr->raid_cinfo[r][c].ci_vp,
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FREAD|FWRITE, proc->p_ucred, proc);
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}
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}
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}
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/* Space allocated for raid_vpp will get cleaned up at some other point */
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/* XXX Need more #ifdefs in the above... */
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#else
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if (rdcap_op) rf_SCSI_FreeDiskOp(rdcap_op, 1);
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if (tur_op) rf_SCSI_FreeDiskOp(tur_op, 0);
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#endif
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#endif /* !SIMULATE */
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return(ret);
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}
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/****************************************************************************************
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* set up the data structures describing the spare disks in the array
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* recall from the above comment that the spare disk descriptors are stored
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* in row zero, which is specially expanded to hold them.
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***************************************************************************************/
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int rf_ConfigureSpareDisks(
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RF_ShutdownList_t **listp,
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RF_Raid_t *raidPtr,
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RF_Config_t *cfgPtr)
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{
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char buf[256];
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int i, ret;
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RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
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unsigned bs;
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RF_RaidDisk_t *disks;
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int num_spares_done;
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#if defined(__NetBSD__) && defined(_KERNEL)
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struct proc *proc;
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#endif
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#ifndef SIMULATE
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#ifndef __NetBSD__
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ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
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if (ret)
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goto fail;
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ret = rf_SCSI_AllocTUR(&tur_op);
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if (ret)
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goto fail;
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#endif /* !__NetBSD__ */
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#endif /* !SIMULATE */
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num_spares_done = 0;
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#if defined(__NetBSD__) && defined(_KERNEL)
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proc = raidPtr->proc;
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/* The space for the spares should have already been
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allocated by ConfigureDisks() */
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#endif
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disks = &raidPtr->Disks[0][raidPtr->numCol];
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for (i=0; i<raidPtr->numSpare; i++) {
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ret = rf_ConfigureDisk(raidPtr,&cfgPtr->spare_names[i][0],
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&disks[i], rdcap_op, tur_op,
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cfgPtr->spare_devs[i],0,raidPtr->numCol+i);
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if (ret)
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goto fail;
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if (disks[i].status != rf_ds_optimal) {
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RF_ERRORMSG1("Warning: spare disk %s failed TUR\n",buf);
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} else {
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disks[i].status = rf_ds_spare; /* change status to spare */
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DPRINTF6("Spare Disk %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n",i,
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disks[i].devname,
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(long int) disks[i].numBlocks,disks[i].blockSize,
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(long int) disks[i].numBlocks * disks[i].blockSize / 1024 / 1024);
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}
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num_spares_done++;
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}
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#ifndef SIMULATE
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#if defined(__NetBSD__) && (_KERNEL)
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#else
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rf_SCSI_FreeDiskOp(rdcap_op, 1); rdcap_op = NULL;
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rf_SCSI_FreeDiskOp(tur_op, 0); tur_op = NULL;
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#endif
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#endif /* !SIMULATE */
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/* check sizes and block sizes on spare disks */
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bs = 1 << raidPtr->logBytesPerSector;
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for (i=0; i<raidPtr->numSpare; i++) {
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if (disks[i].blockSize != bs) {
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RF_ERRORMSG3("Block size of %d on spare disk %s is not the same as on other disks (%d)\n",disks[i].blockSize, disks[i].devname, bs);
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ret = EINVAL;
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goto fail;
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}
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if (disks[i].numBlocks < raidPtr->sectorsPerDisk) {
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RF_ERRORMSG3("Spare disk %s (%d blocks) is too small to serve as a spare (need %ld blocks)\n",
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disks[i].devname, disks[i].blockSize, (long int)raidPtr->sectorsPerDisk);
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ret = EINVAL;
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goto fail;
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} else if (disks[i].numBlocks > raidPtr->sectorsPerDisk) {
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RF_ERRORMSG2("Warning: truncating spare disk %s to %ld blocks\n",disks[i].devname, (long int) raidPtr->sectorsPerDisk);
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disks[i].numBlocks = raidPtr->sectorsPerDisk;
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}
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}
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return(0);
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fail:
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#ifndef SIMULATE
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#if defined(__NetBSD__) && defined(_KERNEL)
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for(i=0;i<raidPtr->numSpare;i++) {
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/* Cleanup.. */
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#ifdef DEBUG
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printf("Cleaning up spare: %d\n",i);
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#endif
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if (raidPtr->raid_cinfo[0][raidPtr->numCol+i].ci_vp) {
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(void)vn_close(raidPtr->raid_cinfo[0][raidPtr->numCol+i].ci_vp,
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FREAD|FWRITE, proc->p_ucred, proc);
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}
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}
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#else
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if (rdcap_op) rf_SCSI_FreeDiskOp(rdcap_op, 1);
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if (tur_op) rf_SCSI_FreeDiskOp(tur_op, 0);
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#endif
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#endif /* !SIMULATE */
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return(ret);
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}
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/* configure a single disk in the array */
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int rf_ConfigureDisk(raidPtr, buf, diskPtr, rdcap_op, tur_op, dev, row, col)
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RF_Raid_t *raidPtr; /* We need this down here too!! GO */
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char *buf;
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RF_RaidDisk_t *diskPtr;
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RF_DiskOp_t *rdcap_op;
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RF_DiskOp_t *tur_op;
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dev_t dev; /* device number used only in kernel */
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RF_RowCol_t row;
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RF_RowCol_t col;
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{
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|
char *p;
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#ifdef SIMULATE
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double init_offset;
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#else /* SIMULATE */
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#if defined(__NetBSD__) && defined(_KERNEL)
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int retcode;
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#else
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int busid, targid, lun, retcode;
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#endif
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#endif /* SIMULATE */
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#if defined(__NetBSD__) && defined(_KERNEL)
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struct partinfo dpart;
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struct vnode *vp;
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struct vattr va;
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struct proc *proc;
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int error;
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#endif
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retcode = 0;
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p = rf_find_non_white(buf);
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if (p[strlen(p)-1] == '\n') {
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/* strip off the newline */
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p[strlen(p)-1] = '\0';
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}
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(void) strcpy(diskPtr->devname, p);
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|
#ifdef SIMULATE
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|
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init_offset = 0.0;
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rf_InitDisk(&diskPtr->diskState, disk_db_file_name,diskPtr->devname,0,0,init_offset,row,col);
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rf_GeometryDoReadCapacity(&diskPtr->diskState, &diskPtr->numBlocks, &diskPtr->blockSize);
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diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
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|
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|
/* we allow the user to specify that only a fraction of the disks should be used
|
|
* this is just for debug: it speeds up the parity scan
|
|
*/
|
|
|
|
#else /* SIMULATE */
|
|
#ifndef __NetBSD__
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|
/* get bus, target, lun */
|
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retcode = rf_extract_ids(p, &busid, &targid, &lun);
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|
if (retcode)
|
|
return(retcode);
|
|
|
|
/* required in kernel, nop at user level */
|
|
retcode = rf_SCSI_OpenUnit(dev);
|
|
if (retcode)
|
|
return(retcode);
|
|
|
|
diskPtr->dev = dev;
|
|
if (rf_SCSI_DoTUR(tur_op, (u_char)busid, (u_char)targid, (u_char)lun, dev)) {
|
|
RF_ERRORMSG1("Disk %s failed TUR. Marked as dead.\n",diskPtr->devname);
|
|
diskPtr->status = rf_ds_failed;
|
|
} else {
|
|
diskPtr->status = rf_ds_optimal;
|
|
retcode = rf_SCSI_DoReadCapacity(raidPtr,rdcap_op, busid, targid, lun, dev,
|
|
&diskPtr->numBlocks, &diskPtr->blockSize, diskPtr->devname);
|
|
if (retcode)
|
|
return(retcode);
|
|
|
|
/* we allow the user to specify that only a fraction of the disks should be used
|
|
* this is just for debug: it speeds up the parity scan
|
|
*/
|
|
diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
|
|
}
|
|
#endif
|
|
#if defined(__NetBSD__) && defined(_KERNEL)
|
|
|
|
proc = raidPtr->proc; /* XXX Yes, this is not nice.. */
|
|
|
|
/* Let's start by claiming the component is fine and well... */
|
|
/* XXX not the case if the disk is toast.. */
|
|
diskPtr->status = rf_ds_optimal;
|
|
|
|
|
|
raidPtr->raid_cinfo[row][col].ci_vp = NULL;
|
|
raidPtr->raid_cinfo[row][col].ci_dev = NULL;
|
|
|
|
error = raidlookup(diskPtr->devname, proc, &vp);
|
|
if (error) {
|
|
printf("raidlookup on device: %s failed!\n",diskPtr->devname);
|
|
if (error == ENXIO) {
|
|
/* XXX the component isn't there... must be dead :-( */
|
|
diskPtr->status = rf_ds_failed;
|
|
} else {
|
|
return(error);
|
|
}
|
|
}
|
|
|
|
if (diskPtr->status == rf_ds_optimal) {
|
|
|
|
if ((error = VOP_GETATTR(vp, &va, proc->p_ucred, proc)) != 0) {
|
|
return(error);
|
|
}
|
|
|
|
error = VOP_IOCTL(vp, DIOCGPART, (caddr_t)&dpart,
|
|
FREAD, proc->p_ucred, proc);
|
|
if (error) {
|
|
return(error);
|
|
}
|
|
|
|
|
|
diskPtr->blockSize = dpart.disklab->d_secsize;
|
|
|
|
diskPtr->numBlocks = dpart.part->p_size - rf_protectedSectors;
|
|
|
|
raidPtr->raid_cinfo[row][col].ci_vp = vp;
|
|
raidPtr->raid_cinfo[row][col].ci_dev = va.va_rdev;
|
|
|
|
#if 0
|
|
diskPtr->dev = dev;
|
|
#endif
|
|
|
|
diskPtr->dev = va.va_rdev; /* XXX or the above? */
|
|
|
|
/* we allow the user to specify that only a fraction of the disks should be used
|
|
* this is just for debug: it speeds up the parity scan
|
|
*/
|
|
diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
|
|
|
|
}
|
|
|
|
#endif /* !__NetBSD__ */
|
|
#endif /* SIMULATE */
|
|
|
|
return(0);
|
|
}
|
|
|
|
#ifdef SIMULATE
|
|
|
|
void rf_default_disk_names()
|
|
{
|
|
sprintf(disk_db_file_name,"disk.db");
|
|
sprintf(disk_type_name,"HP2247");
|
|
}
|
|
|
|
void rf_set_disk_db_name(s)
|
|
char *s;
|
|
{
|
|
strcpy(disk_db_file_name,s);
|
|
}
|
|
|
|
void rf_set_disk_type_name(s)
|
|
char *s;
|
|
{
|
|
strcpy(disk_type_name,s);
|
|
}
|
|
|
|
#endif /* SIMULATE */
|