예제 #1
0
/* Do a complete copyback. */
void
rf_CopybackReconstructedData(RF_Raid_t *raidPtr)
{
	RF_ComponentLabel_t c_label;
	int done, retcode;
	RF_CopybackDesc_t *desc;
	RF_RowCol_t frow, fcol;
	RF_RaidDisk_t *badDisk;
	char *databuf;

	struct partinfo dpart;
	struct vnode *vp;
	struct vattr va;
	struct proc *proc;

	int ac;

	done = 0;
	fcol = 0;
	for (frow = 0; frow < raidPtr->numRow; frow++) {
		for (fcol = 0; fcol < raidPtr->numCol; fcol++) {
			if (raidPtr->Disks[frow][fcol].status ==
			     rf_ds_dist_spared ||
			    raidPtr->Disks[frow][fcol].status ==
			     rf_ds_spared) {
				done = 1;
				break;
			}
		}
		if (done)
			break;
	}

	if (frow == raidPtr->numRow) {
		printf("COPYBACK: No disks need copyback.\n");
		return;
	}
	badDisk = &raidPtr->Disks[frow][fcol];

	proc = raidPtr->engine_thread;

	/*
	 * This device may have been opened successfully the first time.
	 * Close it before trying to open it again.
	 */

	if (raidPtr->raid_cinfo[frow][fcol].ci_vp != NULL) {
		printf("Close the opened device: %s.\n",
		    raidPtr->Disks[frow][fcol].devname);
 		vp = raidPtr->raid_cinfo[frow][fcol].ci_vp;
 		ac = raidPtr->Disks[frow][fcol].auto_configured;
 		rf_close_component(raidPtr, vp, ac);
		raidPtr->raid_cinfo[frow][fcol].ci_vp = NULL;

	}
 	/* Note that this disk was *not* auto_configured (any longer). */
 	raidPtr->Disks[frow][fcol].auto_configured = 0;

	printf("About to (re-)open the device: %s.\n",
	    raidPtr->Disks[frow][fcol].devname);

	retcode = raidlookup(raidPtr->Disks[frow][fcol].devname, proc, &vp);

	if (retcode) {
		printf("COPYBACK: raidlookup on device: %s failed: %d !\n",
		    raidPtr->Disks[frow][fcol].devname, retcode);

		/*
		 * XXX The component isn't responding properly... Must be
		 * still dead :-(
		 */
		return;

	} else {

		/*
		 * Ok, so we can at least do a lookup...
		 * How about actually getting a vp for it ?
		 */

		if ((retcode = VOP_GETATTR(vp, &va, proc->p_ucred, proc)) != 0)
		{
			return;
		}
		retcode = VOP_IOCTL(vp, DIOCGPART, (caddr_t) &dpart, FREAD,
		    proc->p_ucred, proc);
		if (retcode) {
			return;
		}
		raidPtr->Disks[frow][fcol].blockSize = dpart.disklab->d_secsize;

		raidPtr->Disks[frow][fcol].numBlocks = dpart.part->p_size -
		    rf_protectedSectors;

		raidPtr->raid_cinfo[frow][fcol].ci_vp = vp;
		raidPtr->raid_cinfo[frow][fcol].ci_dev = va.va_rdev;

		/* XXX Or the above ? */
		raidPtr->Disks[frow][fcol].dev = va.va_rdev;

		/*
		 * 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.
		 */
		raidPtr->Disks[frow][fcol].numBlocks =
		    raidPtr->Disks[frow][fcol].numBlocks *
		    rf_sizePercentage / 100;
	}
#if 0
	/* This is the way it was done before the CAM stuff was removed. */

	if (rf_extract_ids(badDisk->devname, &bus, &targ, &lun)) {
		printf("COPYBACK: unable to extract bus, target, lun from"
		    " devname %s.\n", badDisk->devname);
		return;
	}
	/*
	 * TUR the disk that's marked as bad to be sure that it's actually
	 * alive.
	 */
	rf_SCSI_AllocTUR(&tur_op);
	retcode = rf_SCSI_DoTUR(tur_op, bus, targ, lun, badDisk->dev);
	rf_SCSI_FreeDiskOp(tur_op, 0);
#endif

	if (retcode) {
		printf("COPYBACK: target disk failed TUR.\n");
		return;
	}
	/* Get a buffer to hold one SU. */
	RF_Malloc(databuf, rf_RaidAddressToByte(raidPtr,
	    raidPtr->Layout.sectorsPerStripeUnit), (char *));

	/* Create a descriptor. */
	RF_Malloc(desc, sizeof(*desc), (RF_CopybackDesc_t *));
	desc->raidPtr = raidPtr;
	desc->status = 0;
	desc->frow = frow;
	desc->fcol = fcol;
	desc->spRow = badDisk->spareRow;
	desc->spCol = badDisk->spareCol;
	desc->stripeAddr = 0;
	desc->sectPerSU = raidPtr->Layout.sectorsPerStripeUnit;
	desc->sectPerStripe = raidPtr->Layout.sectorsPerStripeUnit *
	    raidPtr->Layout.numDataCol;
	desc->databuf = databuf;
	desc->mcpair = rf_AllocMCPair();

	printf("COPYBACK: Quiescing the array.\n");
	/*
	 * Quiesce the array, since we don't want to code support for user
	 * accs here.
	 */
	rf_SuspendNewRequestsAndWait(raidPtr);

	/* Adjust state of the array and of the disks. */
	RF_LOCK_MUTEX(raidPtr->mutex);
	raidPtr->Disks[desc->frow][desc->fcol].status = rf_ds_optimal;
	raidPtr->status[desc->frow] = rf_rs_optimal;
	rf_copyback_in_progress = 1;	/* Debug only. */
	RF_UNLOCK_MUTEX(raidPtr->mutex);

	printf("COPYBACK: Beginning\n");
	RF_GETTIME(desc->starttime);
	rf_ContinueCopyback(desc);

	/*
	 * Data has been restored.
	 * Fix up the component label.
	 * Don't actually need the read here.
	 */
	raidread_component_label(raidPtr->raid_cinfo[frow][fcol].ci_dev,
				 raidPtr->raid_cinfo[frow][fcol].ci_vp,
				 &c_label);

	raid_init_component_label(raidPtr, &c_label);

	c_label.row = frow;
	c_label.column = fcol;

	raidwrite_component_label(raidPtr->raid_cinfo[frow][fcol].ci_dev,
				  raidPtr->raid_cinfo[frow][fcol].ci_vp,
				  &c_label);
}
예제 #2
0
/****************************************************************************
 *
 * 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;
	int force;

	force = cfgPtr->force;

 	ret = rf_AllocDiskStructures(raidPtr, cfgPtr);
 	if (ret)
		goto fail;

 	disks = raidPtr->Disks;

	for (r = 0; r < raidPtr->numRow; r++) {
		numFailuresThisRow = 0;
		for (c = 0; c < raidPtr->numCol; c++) {
			ret = rf_ConfigureDisk(raidPtr,
			    &cfgPtr->devnames[r][c][0], &disks[r][c], r, c);

			if (ret)
				goto fail;

			if (disks[r][c].status == rf_ds_optimal) {
				raidread_component_label(
					 raidPtr->raid_cinfo[r][c].ci_dev,
					 raidPtr->raid_cinfo[r][c].ci_vp,
					 &raidPtr->raid_cinfo[r][c].ci_label);
			}

			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);
			}
		}
		/* XXX Fix for n-fault tolerant. */
		/*
		 * XXX This should probably check to see how many failures
		 * we can handle for this configuration !
		 */
		if (numFailuresThisRow > 0)
			raidPtr->status[r] = rf_rs_degraded;
	}
	/*
	 * 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;
	}

	if (rf_CheckLabels(raidPtr, cfgPtr)) {
		printf("raid%d: There were fatal errors\n", raidPtr->raidid);
		if (force != 0) {
			printf("raid%d: Fatal errors being ignored.\n",
			    raidPtr->raidid);
		} else {
			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:
	rf_UnconfigureVnodes(raidPtr);

	return (ret);
}