/* $NetBSD: rf_disks.c,v 1.5 1999/02/05 00:06:09 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 ***************************************************************/ #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" #include #include #include #include #include #include #include int raidlookup __P((char *, struct proc * p, struct vnode **)); #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) /**************************************************************************************** * * 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; struct proc *proc = 0; #ifndef __NetBSD__ ret = rf_SCSI_AllocReadCapacity(&rdcap_op); if (ret) goto fail; ret = rf_SCSI_AllocTUR(&tur_op); if (ret) goto fail; #endif /* !__NetBSD__ */ 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; 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; } 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++; } #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 /* 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: #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 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; struct proc *proc; #ifndef __NetBSD__ ret = rf_SCSI_AllocReadCapacity(&rdcap_op); if (ret) goto fail; ret = rf_SCSI_AllocTUR(&tur_op); if (ret) goto fail; #endif /* !__NetBSD__ */ num_spares_done = 0; proc = raidPtr->proc; /* The space for the spares should have already been allocated by * ConfigureDisks() */ 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++; } #if defined(__NetBSD__) && (_KERNEL) #else rf_SCSI_FreeDiskOp(rdcap_op, 1); rdcap_op = NULL; rf_SCSI_FreeDiskOp(tur_op, 0); tur_op = NULL; #endif /* 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: #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 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; int retcode; struct partinfo dpart; struct vnode *vp; struct vattr va; struct proc *proc; int error; 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); #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 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; } return (0); }