NetBSD/sys/dev/raidframe/rf_disks.c

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/* $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__)
#include "rf_camlayer.h"
#endif
#include "rf_options.h"
#include "rf_sys.h"
#if defined(__NetBSD__) && 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>
#include <sys/vnode.h>
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(_KERNEL)
struct proc *proc = 0;
#endif
#ifndef SIMULATE
#ifndef __NetBSD__
ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
if (ret)
goto fail;
ret = rf_SCSI_AllocTUR(&tur_op);
if (ret)
goto fail;
#endif /* !__NetBSD__ */
#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(_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(_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(_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(_KERNEL)
struct proc *proc;
#endif
#ifndef SIMULATE
#ifndef __NetBSD__
ret = rf_SCSI_AllocReadCapacity(&rdcap_op);
if (ret)
goto fail;
ret = rf_SCSI_AllocTUR(&tur_op);
if (ret)
goto fail;
#endif /* !__NetBSD__ */
#endif /* !SIMULATE */
num_spares_done = 0;
#if defined(__NetBSD__) && 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__) && (_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(_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(_KERNEL)
int retcode;
#else
int busid, targid, lun, retcode;
#endif
#endif /* SIMULATE */
#if defined(__NetBSD__) && 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 */
#ifndef __NetBSD__
/* 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(_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 */