Import of CMU's RAIDframe via NetBSD.

1 files changed, 651 insertions, 0 deletions

diff --git a/sys/dev/raidframe/rf_disks.c b/sys/dev/raidframe/rf_disks.c
new file mode 100644
index 00000000000..fc89d407f47
--- /dev/null
+++ b/sys/dev/raidframe/rf_disks.c
@@ -0,0 +1,651 @@
+/*	$OpenBSD: rf_disks.c,v 1.1 1999/01/11 14:29:17 niklas Exp $	*/
+/*	$NetBSD: rf_disks.c,v 1.2 1998/12/03 15:06:25 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.c -- code to perform operations on the actual disks
+ ***************************************************************/
+
+/* :  
+ * Log: rf_disks.c,v 
+ * Revision 1.32  1996/07/27 18:40:24  jimz
+ * cleanup sweep
+ *
+ * Revision 1.31  1996/07/22  19:52:16  jimz
+ * switched node params to RF_DagParam_t, a union of
+ * a 64-bit int and a void *, for better portability
+ * attempted hpux port, but failed partway through for
+ * lack of a single C compiler capable of compiling all
+ * source files
+ *
+ * Revision 1.30  1996/07/19  16:11:21  jimz
+ * pass devname to DoReadCapacity
+ *
+ * Revision 1.29  1996/07/18  22:57:14  jimz
+ * port simulator to AIX
+ *
+ * Revision 1.28  1996/07/10  22:28:38  jimz
+ * get rid of obsolete row statuses (dead,degraded2)
+ *
+ * Revision 1.27  1996/06/10  12:06:14  jimz
+ * don't do any SCSI op stuff in simulator at all
+ *
+ * Revision 1.26  1996/06/10  11:55:47  jimz
+ * Straightened out some per-array/not-per-array distinctions, fixed
+ * a couple bugs related to confusion. Added shutdown lists. Removed
+ * layout shutdown function (now subsumed by shutdown lists).
+ *
+ * Revision 1.25  1996/06/09  02:36:46  jimz
+ * lots of little crufty cleanup- fixup whitespace
+ * issues, comment #ifdefs, improve typing in some
+ * places (esp size-related)
+ *
+ * Revision 1.24  1996/06/07  21:33:04  jimz
+ * begin using consistent types for sector numbers,
+ * stripe numbers, row+col numbers, recon unit numbers
+ *
+ * Revision 1.23  1996/06/03  23:28:26  jimz
+ * more bugfixes
+ * check in tree to sync for IPDS runs with current bugfixes
+ * there still may be a problem with threads in the script test
+ * getting I/Os stuck- not trivially reproducible (runs ~50 times
+ * in a row without getting stuck)
+ *
+ * Revision 1.22  1996/06/02  17:31:48  jimz
+ * Moved a lot of global stuff into array structure, where it belongs.
+ * Fixed up paritylogging, pss modules in this manner. Some general
+ * code cleanup. Removed lots of dead code, some dead files.
+ *
+ * Revision 1.21  1996/05/30  23:22:16  jimz
+ * bugfixes of serialization, timing problems
+ * more cleanup
+ *
+ * Revision 1.20  1996/05/30  11:29:41  jimz
+ * Numerous bug fixes. Stripe lock release code disagreed with the taking code
+ * about when stripes should be locked (I made it consistent: no parity, no lock)
+ * There was a lot of extra serialization of I/Os which I've removed- a lot of
+ * it was to calculate values for the cache code, which is no longer with us.
+ * More types, function, macro cleanup. Added code to properly quiesce the array
+ * on shutdown. Made a lot of stuff array-specific which was (bogusly) general
+ * before. Fixed memory allocation, freeing bugs.
+ *
+ * Revision 1.19  1996/05/27  18:56:37  jimz
+ * more code cleanup
+ * better typing
+ * compiles in all 3 environments
+ *
+ * Revision 1.18  1996/05/24  22:17:04  jimz
+ * continue code + namespace cleanup
+ * typed a bunch of flags
+ *
+ * Revision 1.17  1996/05/24  01:59:45  jimz
+ * another checkpoint in code cleanup for release
+ * time to sync kernel tree
+ *
+ * Revision 1.16  1996/05/23  21:46:35  jimz
+ * checkpoint in code cleanup (release prep)
+ * lots of types, function names have been fixed
+ *
+ * Revision 1.15  1996/05/23  00:33:23  jimz
+ * code cleanup: move all debug decls to rf_options.c, all extern
+ * debug decls to rf_options.h, all debug vars preceded by rf_
+ *
+ * Revision 1.14  1996/05/18  19:51:34  jimz
+ * major code cleanup- fix syntax, make some types consistent,
+ * add prototypes, clean out dead code, et cetera
+ *
+ * Revision 1.13  1996/05/02  14:57:43  jimz
+ * initialize sectorMask
+ *
+ * Revision 1.12  1995/12/01  15:57:04  root
+ * added copyright info
+ *
+ */
+
+#include "rf_types.h"
+#include "rf_raid.h"
+#include "rf_alloclist.h"
+#include "rf_utils.h"
+#include "rf_configure.h"
+#include "rf_general.h"
+#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+#include "rf_camlayer.h"
+#endif
+#include "rf_options.h"
+#include "rf_sys.h"
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+#include <sys/types.h>
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/proc.h>
+#include <sys/ioctl.h>
+#include <sys/fcntl.h>
+#ifdef __NETBSD__
+#include <sys/vnode.h>
+#endif
+
+int raidlookup __P((char *, struct proc *p, struct vnode **));
+#endif
+
+#ifdef SIMULATE
+static char disk_db_file_name[120], disk_type_name[120];
+static double init_offset;
+#endif /* SIMULATE  */
+
+#define DPRINTF6(a,b,c,d,e,f) if (rf_diskDebug) printf(a,b,c,d,e,f)
+#define DPRINTF7(a,b,c,d,e,f,g) if (rf_diskDebug) printf(a,b,c,d,e,f,g)
+
+#include "rf_ccmn.h"
+
+/****************************************************************************************
+ *
+ * initialize the disks comprising the array
+ *
+ * We want the spare disks to have regular row,col numbers so that we can easily
+ * substitue a spare for a failed disk.  But, the driver code assumes throughout
+ * that the array contains numRow by numCol _non-spare_ disks, so it's not clear
+ * how to fit in the spares.  This is an unfortunate holdover from raidSim.  The
+ * quick and dirty fix is to make row zero bigger than the rest, and put all the
+ * spares in it.  This probably needs to get changed eventually.
+ *
+ ***************************************************************************************/
+int rf_ConfigureDisks(
+  RF_ShutdownList_t  **listp,
+  RF_Raid_t           *raidPtr,
+  RF_Config_t         *cfgPtr)
+{
+  RF_RaidDisk_t **disks;
+  RF_SectorCount_t min_numblks = (RF_SectorCount_t)0x7FFFFFFFFFFFLL;
+  RF_RowCol_t r, c;
+  int bs, ret;
+  unsigned i, count, foundone=0, numFailuresThisRow;
+  RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
+  int num_rows_done,num_cols_done;
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+	struct proc *proc = 0;  
+#endif
+#ifndef SIMULATE
+#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+  ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
+  if (ret)
+    goto fail;
+  ret = rf_SCSI_AllocTUR(&tur_op);
+  if (ret)
+    goto fail;
+#endif /* !__NetBSD__ && !__OpenBSD__ */
+#endif /* !SIMULATE */
+
+  num_rows_done = 0;
+  num_cols_done = 0;
+
+
+  RF_CallocAndAdd(disks, raidPtr->numRow, sizeof(RF_RaidDisk_t *), (RF_RaidDisk_t **), raidPtr->cleanupList);
+  if (disks == NULL) {
+    ret = ENOMEM;
+    goto fail;
+  }
+  raidPtr->Disks = disks;
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+
+  proc = raidPtr->proc; /* Blah XXX */
+
+  /* get space for the device-specific stuff... */
+  RF_CallocAndAdd(raidPtr->raid_cinfo, raidPtr->numRow, 
+		  sizeof(struct raidcinfo *), (struct raidcinfo **),
+		  raidPtr->cleanupList);
+  if (raidPtr->raid_cinfo == NULL) {
+	  ret = ENOMEM;
+	  goto fail;
+  }
+#endif
+
+  for (r=0; r<raidPtr->numRow; r++) {
+    numFailuresThisRow = 0;
+    RF_CallocAndAdd(disks[r], raidPtr->numCol + ((r==0) ? raidPtr->numSpare : 0), sizeof(RF_RaidDisk_t), (RF_RaidDisk_t *), raidPtr->cleanupList);
+    if (disks[r] == NULL) {
+      ret = ENOMEM;
+      goto fail;
+    }
+
+    /* get more space for device specific stuff.. */
+    RF_CallocAndAdd(raidPtr->raid_cinfo[r], 
+		    raidPtr->numCol + ((r==0) ? raidPtr->numSpare : 0), 
+		    sizeof(struct raidcinfo), (struct raidcinfo *), 
+		    raidPtr->cleanupList);
+    if (raidPtr->raid_cinfo[r] == NULL) {
+      ret = ENOMEM;
+      goto fail;
+    }
+
+
+    for (c=0; c<raidPtr->numCol; c++) {
+      ret = rf_ConfigureDisk(raidPtr,&cfgPtr->devnames[r][c][0], 
+			     &disks[r][c], rdcap_op, tur_op, 
+			     cfgPtr->devs[r][c],r,c);
+      if (ret)
+        goto fail;
+      if (disks[r][c].status != rf_ds_optimal) {
+        numFailuresThisRow++;
+      }
+      else {
+        if (disks[r][c].numBlocks < min_numblks)
+          min_numblks = disks[r][c].numBlocks;
+        DPRINTF7("Disk at row %d col %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n",
+          r,c,disks[r][c].devname,
+		 (long int) disks[r][c].numBlocks,
+		 disks[r][c].blockSize,
+		 (long int) disks[r][c].numBlocks * disks[r][c].blockSize / 1024 / 1024);
+      }
+      num_cols_done++;
+    }
+    /* XXX fix for n-fault tolerant */
+    if (numFailuresThisRow > 0)
+      raidPtr->status[r] = rf_rs_degraded;
+    num_rows_done++;
+  }
+#ifndef SIMULATE
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+  /* we do nothing */
+#else
+  rf_SCSI_FreeDiskOp(rdcap_op, 1); rdcap_op = NULL;
+  rf_SCSI_FreeDiskOp(tur_op, 0);   tur_op   = NULL;
+#endif
+#endif /* !SIMULATE */
+  /* all disks must be the same size & have the same block size, bs must be a power of 2 */
+  bs = 0;
+  for (foundone=r=0; !foundone && r<raidPtr->numRow; r++) {
+    for (c=0; !foundone && c<raidPtr->numCol; c++) {
+      if (disks[r][c].status == rf_ds_optimal) {
+        bs = disks[r][c].blockSize;
+        foundone = 1;
+      }
+    }
+  }
+  if (!foundone) {
+    RF_ERRORMSG("RAIDFRAME: Did not find any live disks in the array.\n");
+    ret = EINVAL;
+    goto fail;
+  }
+  for (count=0,i=1; i; i<<=1) if (bs & i)
+    count++;
+  if (count != 1) {
+    RF_ERRORMSG1("Error: block size on disks (%d) must be a power of 2\n",bs);
+    ret = EINVAL;
+    goto fail;
+  }
+  for (r=0; r<raidPtr->numRow; r++) {
+    for (c=0; c<raidPtr->numCol; c++) {
+      if (disks[r][c].status == rf_ds_optimal) {
+	if (disks[r][c].blockSize != bs) {
+	  RF_ERRORMSG2("Error: block size of disk at r %d c %d different from disk at r 0 c 0\n",r,c);
+	  ret = EINVAL;
+	  goto fail;
+	}
+	if (disks[r][c].numBlocks != min_numblks) {
+	  RF_ERRORMSG3("WARNING: truncating disk at r %d c %d to %d blocks\n",
+		       r,c,(int) min_numblks);
+	  disks[r][c].numBlocks = min_numblks;
+	}
+      }
+    }
+  }
+
+  raidPtr->sectorsPerDisk = min_numblks;
+  raidPtr->logBytesPerSector = ffs(bs) - 1;
+  raidPtr->bytesPerSector = bs;
+  raidPtr->sectorMask = bs-1;
+  return(0);
+
+fail:
+
+#ifndef SIMULATE
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+
+  for(r=0;r<raidPtr->numRow;r++) {
+	  for(c=0;c<raidPtr->numCol;c++) {
+		  /* Cleanup.. */
+#ifdef DEBUG
+		  printf("Cleaning up row: %d col: %d\n",r,c);
+#endif
+		  if (raidPtr->raid_cinfo[r][c].ci_vp) {
+			  (void)vn_close(raidPtr->raid_cinfo[r][c].ci_vp, 
+					 FREAD|FWRITE, proc->p_ucred, proc);
+		  }
+	  }
+  }
+  /* Space allocated for raid_vpp will get cleaned up at some other point */
+  /* XXX Need more #ifdefs in the above... */
+
+#else 
+
+  if (rdcap_op) rf_SCSI_FreeDiskOp(rdcap_op, 1);
+  if (tur_op)   rf_SCSI_FreeDiskOp(tur_op, 0);
+
+#endif
+#endif /* !SIMULATE */
+  return(ret);
+}
+
+
+/****************************************************************************************
+ * set up the data structures describing the spare disks in the array
+ * recall from the above comment that the spare disk descriptors are stored
+ * in row zero, which is specially expanded to hold them.
+ ***************************************************************************************/
+int rf_ConfigureSpareDisks(
+  RF_ShutdownList_t  **listp,
+  RF_Raid_t           *raidPtr,
+  RF_Config_t         *cfgPtr)
+{
+  char buf[256];
+  int r,c,i, ret;
+  RF_DiskOp_t *rdcap_op = NULL, *tur_op = NULL;
+  unsigned bs;
+  RF_RaidDisk_t *disks;
+  int num_spares_done;
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+	struct proc *proc;  
+#endif
+
+#ifndef SIMULATE
+#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+  ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
+  if (ret)
+    goto fail;
+  ret = rf_SCSI_AllocTUR(&tur_op);
+  if (ret)
+    goto fail;
+#endif /* !__NetBSD__ && !__OpenBSD__ */
+#endif /* !SIMULATE */
+
+  num_spares_done = 0;
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+  proc = raidPtr->proc;
+  /* The space for the spares should have already been 
+     allocated by ConfigureDisks() */
+#endif
+
+  disks = &raidPtr->Disks[0][raidPtr->numCol];
+  for (i=0; i<raidPtr->numSpare; i++) {
+    ret = rf_ConfigureDisk(raidPtr,&cfgPtr->spare_names[i][0], 
+			   &disks[i], rdcap_op, tur_op, 
+			   cfgPtr->spare_devs[i],0,raidPtr->numCol+i);
+    if (ret)
+      goto fail;
+    if (disks[i].status != rf_ds_optimal) {
+      RF_ERRORMSG1("Warning: spare disk %s failed TUR\n",buf);
+    } else {
+      disks[i].status = rf_ds_spare;      /* change status to spare */
+      DPRINTF6("Spare Disk %d: dev %s numBlocks %ld blockSize %d (%ld MB)\n",i,
+	       disks[i].devname,
+	       (long int) disks[i].numBlocks,disks[i].blockSize,
+	       (long int) disks[i].numBlocks * disks[i].blockSize / 1024 / 1024);
+    }
+    num_spares_done++;
+  }
+#ifndef SIMULATE
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && (_KERNEL)
+
+#else
+  rf_SCSI_FreeDiskOp(rdcap_op, 1); rdcap_op = NULL;
+  rf_SCSI_FreeDiskOp(tur_op, 0);   tur_op   = NULL;
+#endif
+#endif /* !SIMULATE */
+
+  /* check sizes and block sizes on spare disks */
+  bs = 1 << raidPtr->logBytesPerSector;
+  for (i=0; i<raidPtr->numSpare; i++) {
+    if (disks[i].blockSize != bs) {
+      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);
+      ret = EINVAL;
+      goto fail;
+    }
+    if (disks[i].numBlocks < raidPtr->sectorsPerDisk) {
+	    RF_ERRORMSG3("Spare disk %s (%d blocks) is too small to serve as a spare (need %ld blocks)\n", 
+		disks[i].devname, disks[i].blockSize, (long int)raidPtr->sectorsPerDisk);
+      ret = EINVAL;
+      goto fail;
+    } else if (disks[i].numBlocks > raidPtr->sectorsPerDisk) {
+	    RF_ERRORMSG2("Warning: truncating spare disk %s to %ld blocks\n",disks[i].devname, (long int) raidPtr->sectorsPerDisk);
+
+      disks[i].numBlocks = raidPtr->sectorsPerDisk;
+    }
+  }
+  
+  return(0);
+
+fail:
+#ifndef SIMULATE
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+
+  /* Release the hold on the main components.  We've failed to allocate a 
+     spare, and since we're failing, we need to free things.. */
+
+  for(r=0;r<raidPtr->numRow;r++) {
+	  for(c=0;c<raidPtr->numCol;c++) {
+		  /* Cleanup.. */
+#ifdef DEBUG
+		  printf("Cleaning up row: %d col: %d\n",r,c);
+#endif
+		  if (raidPtr->raid_cinfo[r][c].ci_vp) {
+			  (void)vn_close(raidPtr->raid_cinfo[r][c].ci_vp, 
+					 FREAD|FWRITE, proc->p_ucred, proc);
+		  }
+	  }
+  }
+
+  for(i=0;i<raidPtr->numSpare;i++) {
+	  /* Cleanup.. */
+#ifdef DEBUG
+	  printf("Cleaning up spare: %d\n",i);
+#endif
+	  if (raidPtr->raid_cinfo[0][raidPtr->numCol+i].ci_vp) {
+		  (void)vn_close(raidPtr->raid_cinfo[0][raidPtr->numCol+i].ci_vp, 
+				 FREAD|FWRITE, proc->p_ucred, proc);
+	  }
+  }
+
+#else 
+
+  if (rdcap_op) rf_SCSI_FreeDiskOp(rdcap_op, 1);
+  if (tur_op)   rf_SCSI_FreeDiskOp(tur_op, 0);
+
+#endif
+
+#endif /* !SIMULATE */
+  return(ret);
+}
+
+
+
+/* configure a single disk in the array */
+int rf_ConfigureDisk(raidPtr, buf, diskPtr, rdcap_op, tur_op, dev, row, col)
+  RF_Raid_t      *raidPtr;  /* We need this down here too!! GO */
+  char           *buf;
+  RF_RaidDisk_t  *diskPtr;
+  RF_DiskOp_t    *rdcap_op;
+  RF_DiskOp_t    *tur_op;
+  dev_t           dev;      /* device number used only in kernel */
+  RF_RowCol_t     row;
+  RF_RowCol_t     col;
+{
+  char *p;
+#ifdef SIMULATE
+  double	init_offset;
+#else /* SIMULATE  */
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+  int retcode;
+#else
+  int busid, targid, lun, retcode;
+#endif
+#endif /* SIMULATE  */
+
+#if (defined(__NetBSD__) || defined(__OpenBSD__)) && defined(_KERNEL)
+	struct partinfo dpart;
+	struct vnode *vp;
+	struct vattr va;
+	struct proc *proc;
+	int error;
+#endif
+
+retcode = 0;
+  p = rf_find_non_white(buf);
+  if (p[strlen(p)-1] == '\n') {
+    /* strip off the newline */
+    p[strlen(p)-1] = '\0';
+  }
+  (void) strcpy(diskPtr->devname, p);
+
+#ifdef SIMULATE
+
+  init_offset = 0.0;
+  rf_InitDisk(&diskPtr->diskState, disk_db_file_name,diskPtr->devname,0,0,init_offset,row,col);
+  rf_GeometryDoReadCapacity(&diskPtr->diskState, &diskPtr->numBlocks, &diskPtr->blockSize);
+  diskPtr->numBlocks = diskPtr->numBlocks * rf_sizePercentage / 100;
+  
+  /* 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 */
+#if !defined(__NetBSD__) && !defined(__OpenBSD__)
+  /* get bus, target, lun */
+  retcode = rf_extract_ids(p, &busid, &targid, &lun);
+  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(__OpenBSD__)) && 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__ && !__OpenBSD__ */
+#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 */