[thirdparty/mdadm.git] / raid6check.c

/*
 * raid6check - extended consistency check for RAID-6
 *
 * Copyright (C) 2011 Piergiorgio Sartor
 *
 *
 *    This program is free software; you can redistribute it and/or modify
 *    it under the terms of the GNU General Public License as published by
 *    the Free Software Foundation; either version 2 of the License, or
 *    (at your option) any later version.
 *
 *    This program is distributed in the hope that it will be useful,
 *    but WITHOUT ANY WARRANTY; without even the implied warranty of
 *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *    GNU General Public License for more details.
 *
 *    You should have received a copy of the GNU General Public License
 *    along with this program; if not, write to the Free Software
 *    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 *
 *    Author: Piergiorgio Sartor
 *    Based on "restripe.c" from "mdadm" codebase
 */

#include "mdadm.h"
#include <stdint.h>
#include <signal.h>
#include <sys/mman.h>

#define CHECK_PAGE_BITS (12)
#define CHECK_PAGE_SIZE (1 << CHECK_PAGE_BITS)

enum repair {
	NO_REPAIR = 0,
	MANUAL_REPAIR,
	AUTO_REPAIR
};

int geo_map(int block, unsigned long long stripe, int raid_disks,
	    int level, int layout);
void qsyndrome(uint8_t *p, uint8_t *q, uint8_t **sources, int disks, int size);
void make_tables(void);
void ensure_zero_has_size(int chunk_size);
void raid6_datap_recov(int disks, size_t bytes, int faila, uint8_t **ptrs);
void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
		       uint8_t **ptrs);
void xor_blocks(char *target, char **sources, int disks, int size);

/* Collect per stripe consistency information */
void raid6_collect(int chunk_size, uint8_t *p, uint8_t *q,
		   char *chunkP, char *chunkQ, int *results)
{
	int i;
	int data_id;
	uint8_t Px, Qx;
	extern uint8_t raid6_gflog[];

	for(i = 0; i < chunk_size; i++) {
		Px = (uint8_t)chunkP[i] ^ (uint8_t)p[i];
		Qx = (uint8_t)chunkQ[i] ^ (uint8_t)q[i];

		if((Px != 0) && (Qx == 0))
			results[i] = -1;

		if((Px == 0) && (Qx != 0))
			results[i] = -2;

		if((Px != 0) && (Qx != 0)) {
			data_id = (raid6_gflog[Qx] - raid6_gflog[Px]);
			if(data_id < 0) data_id += 255;
			results[i] = data_id;
		}

		if((Px == 0) && (Qx == 0))
			results[i] = -255;
	}
}

/* Try to find out if a specific disk has problems in a CHECK_PAGE_SIZE page size */
int raid6_stats_blk(int *results, int raid_disks)
{
	int i;
	int curr_broken_disk = -255;
	int prev_broken_disk = -255;
	int broken_status = 0;

	for(i = 0; i < CHECK_PAGE_SIZE; i++) {

		if(results[i] != -255)
			curr_broken_disk = results[i];

		if(curr_broken_disk >= raid_disks)
			broken_status = 2;

		switch(broken_status) {
		case 0:
			if(curr_broken_disk != -255) {
				prev_broken_disk = curr_broken_disk;
				broken_status = 1;
			}
			break;

		case 1:
			if(curr_broken_disk != prev_broken_disk)
				broken_status = 2;
			break;

		case 2:
		default:
			curr_broken_disk = prev_broken_disk = -65535;
			break;
		}
	}

	return curr_broken_disk;
}

/* Collect disks status for a strip in CHECK_PAGE_SIZE page size blocks */
void raid6_stats(int *disk, int *results, int raid_disks, int chunk_size)
{
	int i, j;

	for(i = 0, j = 0; i < chunk_size; i += CHECK_PAGE_SIZE, j++) {
		disk[j] = raid6_stats_blk(&results[i], raid_disks);
	}
}

int lock_stripe(struct mdinfo *info, unsigned long long start,
		int chunk_size, int data_disks, sighandler_t *sig) {
	int rv;
	if(mlockall(MCL_CURRENT | MCL_FUTURE) != 0) {
		return 2;
	}

	sig[0] = signal(SIGTERM, SIG_IGN);
	sig[1] = signal(SIGINT, SIG_IGN);
	sig[2] = signal(SIGQUIT, SIG_IGN);

	rv = sysfs_set_num(info, NULL, "suspend_lo", start * chunk_size * data_disks);
	rv |= sysfs_set_num(info, NULL, "suspend_hi", (start + 1) * chunk_size * data_disks);
	return rv * 256;
}

int unlock_all_stripes(struct mdinfo *info, sighandler_t *sig) {
	int rv;
	rv = sysfs_set_num(info, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL);
	rv |= sysfs_set_num(info, NULL, "suspend_hi", 0);
	rv |= sysfs_set_num(info, NULL, "suspend_lo", 0);

	signal(SIGQUIT, sig[2]);
	signal(SIGINT, sig[1]);
	signal(SIGTERM, sig[0]);

	if(munlockall() != 0)
		return 3;
	return rv * 256;
}

int check_stripes(struct mdinfo *info, int *source, unsigned long long *offsets,
		  int raid_disks, int chunk_size, int level, int layout,
		  unsigned long long start, unsigned long long length, char *name[],
		  enum repair repair, int failed_disk1, int failed_disk2)
{
	/* read the data and p and q blocks, and check we got them right */
	char *stripe_buf = xmalloc(raid_disks * chunk_size);
	char **stripes = xmalloc(raid_disks * sizeof(char*));
	char **blocks = xmalloc(raid_disks * sizeof(char*));
	char **blocks_page = xmalloc(raid_disks * sizeof(char*));
	int *block_index_for_slot = xmalloc(raid_disks * sizeof(int));
	uint8_t *p = xmalloc(chunk_size);
	uint8_t *q = xmalloc(chunk_size);
	int *results = xmalloc(chunk_size * sizeof(int));
	sighandler_t *sig = xmalloc(3 * sizeof(sighandler_t));

	int i, j;
	int diskP, diskQ;
	int data_disks = raid_disks - 2;
	int err = 0;

	extern int tables_ready;

	if (!tables_ready)
		make_tables();

	for ( i = 0 ; i < raid_disks ; i++)
		stripes[i] = stripe_buf + i * chunk_size;

	while (length > 0) {
		int disk[chunk_size >> CHECK_PAGE_BITS];

		err = lock_stripe(info, start, chunk_size, data_disks, sig);
		if(err != 0) {
			if (err != 2)
				unlock_all_stripes(info, sig);
			goto exitCheck;
		}
		for (i = 0 ; i < raid_disks ; i++) {
			off64_t seek_res = lseek64(source[i], offsets[i] + start * chunk_size,
						   SEEK_SET);
			if (seek_res < 0) {
				fprintf(stderr, "lseek to source %d failed\n", i);
				unlock_all_stripes(info, sig);
				err = -1;
				goto exitCheck;
			}
			int read_res = read(source[i], stripes[i], chunk_size);
			if (read_res < chunk_size) {
				fprintf(stderr, "Failed to read complete chunk disk %d, aborting\n", i);
				unlock_all_stripes(info, sig);
				err = -1;
				goto exitCheck;
			}
		}
		err = unlock_all_stripes(info, sig);
		if(err != 0)
			goto exitCheck;

		for (i = 0 ; i < data_disks ; i++) {
			int disk = geo_map(i, start, raid_disks, level, layout);
			blocks[i] = stripes[disk];
			block_index_for_slot[disk] = i;
		}

		qsyndrome(p, q, (uint8_t**)blocks, data_disks, chunk_size);
		diskP = geo_map(-1, start, raid_disks, level, layout);
		diskQ = geo_map(-2, start, raid_disks, level, layout);
		blocks[data_disks] = stripes[diskP];
		block_index_for_slot[diskP] = data_disks;
		blocks[data_disks+1] = stripes[diskQ];
		block_index_for_slot[diskQ] = data_disks+1;

		raid6_collect(chunk_size, p, q, stripes[diskP], stripes[diskQ], results);
		raid6_stats(disk, results, raid_disks, chunk_size);

		for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
			if(disk[j] >= -2) {
				disk[j] = geo_map(disk[j], start, raid_disks, level, layout);
			}
			if(disk[j] >= 0) {
				printf("Error detected at stripe %llu, page %d: possible failed disk slot: %d --> %s\n",
					start, j, disk[j], name[disk[j]]);
			}
			if(disk[j] == -65535) {
				printf("Error detected at stripe %llu, page %d: disk slot unknown\n", start, j);
			}
		}

		if(repair == MANUAL_REPAIR) {
			printf("Repairing stripe %llu\n", start);
			printf("Assuming slots %d (%s) and %d (%s) are incorrect\n",
			       failed_disk1, name[failed_disk1],
			       failed_disk2, name[failed_disk2]);

			if (failed_disk1 == diskQ || failed_disk2 == diskQ) {
				char *all_but_failed_blocks[data_disks];
				int failed_data_or_p;
				int failed_block_index;

				if (failed_disk1 == diskQ)
					failed_data_or_p = failed_disk2;
				else
					failed_data_or_p = failed_disk1;
				printf("Repairing D/P(%d) and Q\n", failed_data_or_p);
				failed_block_index = block_index_for_slot[failed_data_or_p];
				for (i=0; i < data_disks; i++)
					if (failed_block_index == i)
						all_but_failed_blocks[i] = stripes[diskP];
					else
						all_but_failed_blocks[i] = blocks[i];
				xor_blocks(stripes[failed_data_or_p],
					all_but_failed_blocks, data_disks, chunk_size);
				qsyndrome(p, (uint8_t*)stripes[diskQ], (uint8_t**)blocks, data_disks, chunk_size);
			} else {
				ensure_zero_has_size(chunk_size);
				if (failed_disk1 == diskP || failed_disk2 == diskP) {
					int failed_data, failed_block_index;
					if (failed_disk1 == diskP)
						failed_data = failed_disk2;
					else
						failed_data = failed_disk1;
					failed_block_index = block_index_for_slot[failed_data];
					printf("Repairing D(%d) and P\n", failed_data);
					raid6_datap_recov(raid_disks, chunk_size, failed_block_index, (uint8_t**)blocks);
				} else {
					printf("Repairing D and D\n");
					int failed_block_index1 = block_index_for_slot[failed_disk1];
					int failed_block_index2 = block_index_for_slot[failed_disk2];
					if (failed_block_index1 > failed_block_index2) {
						int t = failed_block_index1;
						failed_block_index1 = failed_block_index2;
						failed_block_index2 = t;
					}
					raid6_2data_recov(raid_disks, chunk_size, failed_block_index1, failed_block_index2, (uint8_t**)blocks);
				}
			}

			err = lock_stripe(info, start, chunk_size, data_disks, sig);
			if(err != 0) {
				if (err != 2)
					unlock_all_stripes(info, sig);
				goto exitCheck;
			}

			int write_res1, write_res2;
			off64_t seek_res;

			seek_res = lseek64(source[failed_disk1],
					   offsets[failed_disk1] + start * chunk_size, SEEK_SET);
			if (seek_res < 0) {
				fprintf(stderr, "lseek failed for failed_disk1\n");
				unlock_all_stripes(info, sig);
				err = -1;
				goto exitCheck;
			}
			write_res1 = write(source[failed_disk1], stripes[failed_disk1], chunk_size);

			seek_res = lseek64(source[failed_disk2],
					   offsets[failed_disk2] + start * chunk_size, SEEK_SET);
			if (seek_res < 0) {
				fprintf(stderr, "lseek failed for failed_disk1\n");
				unlock_all_stripes(info, sig);
				err = -1;
				goto exitCheck;
			}
			write_res2 = write(source[failed_disk2], stripes[failed_disk2], chunk_size);

			err = unlock_all_stripes(info, sig);
			if(err != 0)
				goto exitCheck;

			if (write_res1 != chunk_size || write_res2 != chunk_size) {
				fprintf(stderr, "Failed to write a complete chunk.\n");
				goto exitCheck;
			}

		}

		int pages_to_write_count = 0;
		int page_to_write[chunk_size >> CHECK_PAGE_BITS];
		for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
			if (disk[j] >= 0 && repair == AUTO_REPAIR) {
				printf("Auto-repairing slot %d (%s)\n", disk[j], name[disk[j]]);
				pages_to_write_count++;
				page_to_write[j] = 1;
				for(i = 0; i < raid_disks; i++) {
					blocks_page[i] = blocks[i] + j * CHECK_PAGE_SIZE;
				}
				if (disk[j] == diskQ) {
					qsyndrome(p, (uint8_t*)stripes[diskQ] + j * CHECK_PAGE_SIZE, (uint8_t**)blocks_page, data_disks, CHECK_PAGE_SIZE);
				} else {
					char *all_but_failed_blocks[data_disks];
					int failed_block_index = block_index_for_slot[disk[j]];
					for (i=0; i < data_disks; i++)
						if (failed_block_index == i)
							all_but_failed_blocks[i] = stripes[diskP] + j * CHECK_PAGE_SIZE;
						else
							all_but_failed_blocks[i] = blocks_page[i];
					xor_blocks(stripes[disk[j]] + j * CHECK_PAGE_SIZE,
					all_but_failed_blocks, data_disks, CHECK_PAGE_SIZE);
				}
			} else {
				page_to_write[j] = 0;
			}
		}

		if(pages_to_write_count > 0) {

			err = lock_stripe(info, start, chunk_size, data_disks, sig);
			if(err != 0) {
				if (err != 2)
					unlock_all_stripes(info, sig);
				goto exitCheck;
			}

			int write_res = 0;
			for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
				if(page_to_write[j] == 1) {
					lseek64(source[disk[j]], offsets[disk[j]] + start * chunk_size + j * CHECK_PAGE_SIZE, 0);
					write_res += write(source[disk[j]], stripes[disk[j]] + j * CHECK_PAGE_SIZE, CHECK_PAGE_SIZE);
				}
			}

			err = unlock_all_stripes(info, sig);
			if (err != 0 || write_res != (CHECK_PAGE_SIZE * pages_to_write_count))
				goto exitCheck;

			if (write_res != (CHECK_PAGE_SIZE * pages_to_write_count)) {
				fprintf(stderr, "Failed to write a full chunk.\n");
				goto exitCheck;
			}
		}

		length--;
		start++;
	}

exitCheck:

	free(stripe_buf);
	free(stripes);
	free(blocks);
	free(blocks_page);
	free(block_index_for_slot);
	free(p);
	free(q);
	free(results);
	free(sig);

	return err;
}

unsigned long long getnum(char *str, char **err)
{
	char *e;
	unsigned long long rv = strtoull(str, &e, 10);
	if (e==str || *e) {
		*err = str;
		return 0;
	}
	return rv;
}

int main(int argc, char *argv[])
{
	/* md_device start length */
	int *fds = NULL;
	char *buf = NULL;
	char **disk_name = NULL;
	unsigned long long *offsets = NULL;
	int raid_disks = 0;
	int active_disks;
	int chunk_size = 0;
	int layout = -1;
	int level = 6;
	enum repair repair = NO_REPAIR;
	int failed_disk1 = -1;
	int failed_disk2 = -1;
	unsigned long long start, length;
	int i;
	int mdfd;
	struct mdinfo *info = NULL, *comp = NULL;
	char *err = NULL;
	int exit_err = 0;
	int close_flag = 0;
	char *prg = strrchr(argv[0], '/');

	if (prg == NULL)
		prg = argv[0];
	else
		prg++;

	if (argc < 4) {
		fprintf(stderr, "Usage: %s md_device start_stripe length_stripes [autorepair]\n", prg);
		fprintf(stderr, "   or: %s md_device repair stripe failed_slot_1 failed_slot_2\n", prg);
		exit_err = 1;
		goto exitHere;
	}

	mdfd = open(argv[1], O_RDONLY);
	if(mdfd < 0) {
		perror(argv[1]);
		fprintf(stderr, "%s: cannot open %s\n", prg, argv[1]);
		exit_err = 2;
		goto exitHere;
	}

	info = sysfs_read(mdfd, NULL,
			  GET_LEVEL|
			  GET_LAYOUT|
			  GET_DISKS|
			  GET_DEGRADED |
			  GET_COMPONENT|
			  GET_CHUNK|
			  GET_DEVS|
			  GET_OFFSET|
			  GET_SIZE);

	if(info == NULL) {
		fprintf(stderr, "%s: Error reading sysfs information of %s\n", prg, argv[1]);
		exit_err = 9;
		goto exitHere;
	}

	if(info->array.level != level) {
		fprintf(stderr, "%s: %s not a RAID-6\n", prg, argv[1]);
		exit_err = 3;
		goto exitHere;
	}

	if(info->array.failed_disks > 0) {
		fprintf(stderr, "%s: %s degraded array\n", prg, argv[1]);
		exit_err = 8;
		goto exitHere;
	}

	printf("layout: %d\n", info->array.layout);
	printf("disks: %d\n", info->array.raid_disks);
	printf("component size: %llu\n", info->component_size * 512);
	printf("total stripes: %llu\n", (info->component_size * 512) / info->array.chunk_size);
	printf("chunk size: %d\n", info->array.chunk_size);
	printf("\n");

	comp = info->devs;
	for(i = 0, active_disks = 0; active_disks < info->array.raid_disks; i++) {
		printf("disk: %d - offset: %llu - size: %llu - name: %s - slot: %d\n",
			i, comp->data_offset * 512, comp->component_size * 512,
			map_dev(comp->disk.major, comp->disk.minor, 0),
			comp->disk.raid_disk);
		if(comp->disk.raid_disk >= 0)
			active_disks++;
		comp = comp->next;
	}
	printf("\n");

	close(mdfd);

	raid_disks = info->array.raid_disks;
	chunk_size = info->array.chunk_size;
	layout = info->array.layout;
	if (strcmp(argv[2], "repair")==0) {
		if (argc < 6) {
			fprintf(stderr, "For repair mode, call %s md_device repair stripe failed_slot_1 failed_slot_2\n", prg);
			exit_err = 1;
			goto exitHere;
		}
		repair = MANUAL_REPAIR;
		start = getnum(argv[3], &err);
		length = 1;
		failed_disk1 = getnum(argv[4], &err);
		failed_disk2 = getnum(argv[5], &err);

		if(failed_disk1 >= info->array.raid_disks) {
			fprintf(stderr, "%s: failed_slot_1 index is higher than number of devices in raid\n", prg);
			exit_err = 4;
			goto exitHere;
		}
		if(failed_disk2 >= info->array.raid_disks) {
			fprintf(stderr, "%s: failed_slot_2 index is higher than number of devices in raid\n", prg);
			exit_err = 4;
			goto exitHere;
		}
		if(failed_disk1 == failed_disk2) {
			fprintf(stderr, "%s: failed_slot_1 and failed_slot_2 are the same\n", prg);
			exit_err = 4;
			goto exitHere;
		}
	}
	else {
		start = getnum(argv[2], &err);
		length = getnum(argv[3], &err);
		if (argc >= 5 && strcmp(argv[4], "autorepair")==0)
			repair = AUTO_REPAIR;
	}

	if (err) {
		fprintf(stderr, "%s: Bad number: %s\n", prg, err);
		exit_err = 4;
		goto exitHere;
	}

	if(start > ((info->component_size * 512) / chunk_size)) {
		start = (info->component_size * 512) / chunk_size;
		fprintf(stderr, "%s: start beyond disks size\n", prg);
	}

	if((length == 0) ||
	   ((length + start) > ((info->component_size * 512) / chunk_size))) {
		length = (info->component_size * 512) / chunk_size - start;
	}

	disk_name = xmalloc(raid_disks * sizeof(*disk_name));
	fds = xmalloc(raid_disks * sizeof(*fds));
	offsets = xcalloc(raid_disks, sizeof(*offsets));
	buf = xmalloc(raid_disks * chunk_size);

	for(i=0; i<raid_disks; i++) {
		fds[i] = -1;
	}
	close_flag = 1;

	comp = info->devs;
	for (i=0, active_disks=0; active_disks<raid_disks; i++) {
		int disk_slot = comp->disk.raid_disk;
		if(disk_slot >= 0) {
			disk_name[disk_slot] = map_dev(comp->disk.major, comp->disk.minor, 0);
			offsets[disk_slot] = comp->data_offset * 512;
			fds[disk_slot] = open(disk_name[disk_slot], O_RDWR | O_SYNC);
			if (fds[disk_slot] < 0) {
				perror(disk_name[disk_slot]);
				fprintf(stderr,"%s: cannot open %s\n", prg, disk_name[disk_slot]);
				exit_err = 6;
				goto exitHere;
			}
			active_disks++;
		}
		comp = comp->next;
	}

	int rv = check_stripes(info, fds, offsets,
			       raid_disks, chunk_size, level, layout,
			       start, length, disk_name, repair, failed_disk1, failed_disk2);
	if (rv != 0) {
		fprintf(stderr,
			"%s: check_stripes returned %d\n", prg, rv);
		exit_err = 7;
		goto exitHere;
	}

exitHere:

	if (close_flag)
		for(i = 0; i < raid_disks; i++)
			close(fds[i]);

	free(disk_name);
	free(fds);
	free(offsets);
	free(buf);

	exit(exit_err);
}
Commit	Line	Data
979afcb8 PS	1	/*
	2	* raid6check - extended consistency check for RAID-6
	3	*
	4	* Copyright (C) 2011 Piergiorgio Sartor
	5	*
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*
	21	* Author: Piergiorgio Sartor
	22	* Based on "restripe.c" from "mdadm" codebase
	23	*/
	24
	25	#include "mdadm.h"
	26	#include <stdint.h>
8d8ab389 PS	27	#include <signal.h>
8d8ab389 PS	28	#include <sys/mman.h>
979afcb8	29
3b9c9603 PS	30	#define CHECK_PAGE_BITS (12)
	31	#define CHECK_PAGE_SIZE (1 << CHECK_PAGE_BITS)
	32
635b5861 BS	33	enum repair {
	34	NO_REPAIR = 0,
	35	MANUAL_REPAIR,
	36	AUTO_REPAIR
	37	};
	38
979afcb8 PS	39	int geo_map(int block, unsigned long long stripe, int raid_disks,
	40	int level, int layout);
	41	void qsyndrome(uint8_t p, uint8_t q, uint8_t **sources, int disks, int size);
	42	void make_tables(void);
f2e29ad6 RB	43	void ensure_zero_has_size(int chunk_size);
	44	void raid6_datap_recov(int disks, size_t bytes, int faila, uint8_t **ptrs);
	45	void raid6_2data_recov(int disks, size_t bytes, int faila, int failb,
	46	uint8_t **ptrs);
	47	void xor_blocks(char target, char *sources, int disks, int size);
	48
979afcb8 PS	49	/* Collect per stripe consistency information */
	50	void raid6_collect(int chunk_size, uint8_t p, uint8_t q,
	51	char chunkP, char chunkQ, int *results)
	52	{
	53	int i;
	54	int data_id;
	55	uint8_t Px, Qx;
	56	extern uint8_t raid6_gflog[];
	57
	58	for(i = 0; i < chunk_size; i++) {
	59	Px = (uint8_t)chunkP[i] ^ (uint8_t)p[i];
	60	Qx = (uint8_t)chunkQ[i] ^ (uint8_t)q[i];
	61
	62	if((Px != 0) && (Qx == 0))
	63	results[i] = -1;
	64
	65	if((Px == 0) && (Qx != 0))
	66	results[i] = -2;
	67
	68	if((Px != 0) && (Qx != 0)) {
	69	data_id = (raid6_gflog[Qx] - raid6_gflog[Px]);
	70	if(data_id < 0) data_id += 255;
	71	results[i] = data_id;
	72	}
	73
	74	if((Px == 0) && (Qx == 0))
	75	results[i] = -255;
	76	}
	77	}
	78
3b9c9603 PS	79	/* Try to find out if a specific disk has problems in a CHECK_PAGE_SIZE page size */
3b9c9603 PS	80	int raid6_stats_blk(int *results, int raid_disks)
979afcb8 PS	81	{
	82	int i;
	83	int curr_broken_disk = -255;
	84	int prev_broken_disk = -255;
	85	int broken_status = 0;
	86
3b9c9603	87	for(i = 0; i < CHECK_PAGE_SIZE; i++) {
979afcb8 PS	88
	89	if(results[i] != -255)
	90	curr_broken_disk = results[i];
	91
	92	if(curr_broken_disk >= raid_disks)
	93	broken_status = 2;
	94
	95	switch(broken_status) {
	96	case 0:
	97	if(curr_broken_disk != -255) {
	98	prev_broken_disk = curr_broken_disk;
	99	broken_status = 1;
	100	}
	101	break;
	102
	103	case 1:
	104	if(curr_broken_disk != prev_broken_disk)
	105	broken_status = 2;
	106	break;
	107
	108	case 2:
	109	default:
	110	curr_broken_disk = prev_broken_disk = -65535;
	111	break;
	112	}
	113	}
	114
	115	return curr_broken_disk;
	116	}
	117
3b9c9603 PS	118	/* Collect disks status for a strip in CHECK_PAGE_SIZE page size blocks */
	119	void raid6_stats(int disk, int results, int raid_disks, int chunk_size)
	120	{
	121	int i, j;
	122
	123	for(i = 0, j = 0; i < chunk_size; i += CHECK_PAGE_SIZE, j++) {
	124	disk[j] = raid6_stats_blk(&results[i], raid_disks);
	125	}
	126	}
	127
351d7680 RB	128	int lock_stripe(struct mdinfo *info, unsigned long long start,
	129	int chunk_size, int data_disks, sighandler_t *sig) {
	130	int rv;
	131	if(mlockall(MCL_CURRENT \| MCL_FUTURE) != 0) {
	132	return 2;
	133	}
	134
	135	sig[0] = signal(SIGTERM, SIG_IGN);
	136	sig[1] = signal(SIGINT, SIG_IGN);
	137	sig[2] = signal(SIGQUIT, SIG_IGN);
	138
	139	rv = sysfs_set_num(info, NULL, "suspend_lo", start * chunk_size * data_disks);
	140	rv \|= sysfs_set_num(info, NULL, "suspend_hi", (start + 1) * chunk_size * data_disks);
	141	return rv * 256;
	142	}
	143
	144	int unlock_all_stripes(struct mdinfo info, sighandler_t sig) {
	145	int rv;
	146	rv = sysfs_set_num(info, NULL, "suspend_lo", 0x7FFFFFFFFFFFFFFFULL);
	147	rv \|= sysfs_set_num(info, NULL, "suspend_hi", 0);
	148	rv \|= sysfs_set_num(info, NULL, "suspend_lo", 0);
	149
	150	signal(SIGQUIT, sig[2]);
	151	signal(SIGINT, sig[1]);
	152	signal(SIGTERM, sig[0]);
	153
	154	if(munlockall() != 0)
	155	return 3;
	156	return rv * 256;
	157	}
	158
8d8ab389	159	int check_stripes(struct mdinfo info, int source, unsigned long long *offsets,
979afcb8	160	int raid_disks, int chunk_size, int level, int layout,
f2e29ad6	161	unsigned long long start, unsigned long long length, char *name[],
635b5861	162	enum repair repair, int failed_disk1, int failed_disk2)
979afcb8 PS	163	{
979afcb8 PS	164	/* read the data and p and q blocks, and check we got them right */
503975b9 N	165	char stripe_buf = xmalloc(raid_disks chunk_size);
	166	char *stripes = xmalloc(raid_disks sizeof(char*));
	167	char *blocks = xmalloc(raid_disks sizeof(char*));
3b9c9603	168	char *blocks_page = xmalloc(raid_disks sizeof(char*));
696e95a1	169	int block_index_for_slot = xmalloc(raid_disks sizeof(int));
503975b9 N	170	uint8_t *p = xmalloc(chunk_size);
	171	uint8_t *q = xmalloc(chunk_size);
	172	int results = xmalloc(chunk_size sizeof(int));
351d7680	173	sighandler_t sig = xmalloc(3 sizeof(sighandler_t));
979afcb8	174
3b9c9603	175	int i, j;
979afcb8 PS	176	int diskP, diskQ;
979afcb8 PS	177	int data_disks = raid_disks - 2;
af3c3750	178	int err = 0;
979afcb8 PS	179
	180	extern int tables_ready;
	181
	182	if (!tables_ready)
	183	make_tables();
	184
	185	for ( i = 0 ; i < raid_disks ; i++)
	186	stripes[i] = stripe_buf + i * chunk_size;
	187
	188	while (length > 0) {
3b9c9603	189	int disk[chunk_size >> CHECK_PAGE_BITS];
979afcb8	190
351d7680 RB	191	err = lock_stripe(info, start, chunk_size, data_disks, sig);
	192	if(err != 0) {
	193	if (err != 2)
	194	unlock_all_stripes(info, sig);
8d8ab389 PS	195	goto exitCheck;
8d8ab389 PS	196	}
979afcb8	197	for (i = 0 ; i < raid_disks ; i++) {
2161adce BS	198	off64_t seek_res = lseek64(source[i], offsets[i] + start * chunk_size,
	199	SEEK_SET);
	200	if (seek_res < 0) {
	201	fprintf(stderr, "lseek to source %d failed\n", i);
	202	unlock_all_stripes(info, sig);
	203	err = -1;
	204	goto exitCheck;
	205	}
2c7b668d BS	206	int read_res = read(source[i], stripes[i], chunk_size);
	207	if (read_res < chunk_size) {
	208	fprintf(stderr, "Failed to read complete chunk disk %d, aborting\n", i);
	209	unlock_all_stripes(info, sig);
2161adce	210	err = -1;
2c7b668d BS	211	goto exitCheck;
2c7b668d BS	212	}
979afcb8	213	}
351d7680 RB	214	err = unlock_all_stripes(info, sig);
351d7680 RB	215	if(err != 0)
8d8ab389	216	goto exitCheck;
8d8ab389	217
979afcb8	218	for (i = 0 ; i < data_disks ; i++) {
af3c3750	219	int disk = geo_map(i, start, raid_disks, level, layout);
979afcb8	220	blocks[i] = stripes[disk];
696e95a1	221	block_index_for_slot[disk] = i;
979afcb8 PS	222	}
	223
	224	qsyndrome(p, q, (uint8_t**)blocks, data_disks, chunk_size);
af3c3750	225	diskP = geo_map(-1, start, raid_disks, level, layout);
f2e29ad6 RB	226	diskQ = geo_map(-2, start, raid_disks, level, layout);
f2e29ad6 RB	227	blocks[data_disks] = stripes[diskP];
696e95a1	228	block_index_for_slot[diskP] = data_disks;
f2e29ad6	229	blocks[data_disks+1] = stripes[diskQ];
696e95a1	230	block_index_for_slot[diskQ] = data_disks+1;
237e40ce	231
af3c3750	232	raid6_collect(chunk_size, p, q, stripes[diskP], stripes[diskQ], results);
3b9c9603	233	raid6_stats(disk, results, raid_disks, chunk_size);
979afcb8	234
3b9c9603 PS	235	for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
	236	if(disk[j] >= -2) {
	237	disk[j] = geo_map(disk[j], start, raid_disks, level, layout);
	238	}
	239	if(disk[j] >= 0) {
afc755e9	240	printf("Error detected at stripe %llu, page %d: possible failed disk slot: %d --> %s\n",
3b9c9603 PS	241	start, j, disk[j], name[disk[j]]);
	242	}
	243	if(disk[j] == -65535) {
afc755e9	244	printf("Error detected at stripe %llu, page %d: disk slot unknown\n", start, j);
3b9c9603	245	}
979afcb8	246	}
3b9c9603	247
635b5861	248	if(repair == MANUAL_REPAIR) {
f2e29ad6 RB	249	printf("Repairing stripe %llu\n", start);
	250	printf("Assuming slots %d (%s) and %d (%s) are incorrect\n",
	251	failed_disk1, name[failed_disk1],
	252	failed_disk2, name[failed_disk2]);
	253
	254	if (failed_disk1 == diskQ \|\| failed_disk2 == diskQ) {
	255	char *all_but_failed_blocks[data_disks];
696e95a1	256	int failed_data_or_p;
f2e29ad6 RB	257	int failed_block_index;
	258
	259	if (failed_disk1 == diskQ)
696e95a1	260	failed_data_or_p = failed_disk2;
f2e29ad6	261	else
696e95a1 RB	262	failed_data_or_p = failed_disk1;
	263	printf("Repairing D/P(%d) and Q\n", failed_data_or_p);
	264	failed_block_index = block_index_for_slot[failed_data_or_p];
f2e29ad6 RB	265	for (i=0; i < data_disks; i++)
	266	if (failed_block_index == i)
	267	all_but_failed_blocks[i] = stripes[diskP];
	268	else
	269	all_but_failed_blocks[i] = blocks[i];
696e95a1	270	xor_blocks(stripes[failed_data_or_p],
f2e29ad6 RB	271	all_but_failed_blocks, data_disks, chunk_size);
	272	qsyndrome(p, (uint8_t)stripes[diskQ], (uint8_t*)blocks, data_disks, chunk_size);
	273	} else {
	274	ensure_zero_has_size(chunk_size);
	275	if (failed_disk1 == diskP \|\| failed_disk2 == diskP) {
	276	int failed_data, failed_block_index;
	277	if (failed_disk1 == diskP)
	278	failed_data = failed_disk2;
	279	else
	280	failed_data = failed_disk1;
696e95a1	281	failed_block_index = block_index_for_slot[failed_data];
f2e29ad6 RB	282	printf("Repairing D(%d) and P\n", failed_data);
	283	raid6_datap_recov(raid_disks, chunk_size, failed_block_index, (uint8_t**)blocks);
	284	} else {
	285	printf("Repairing D and D\n");
696e95a1 RB	286	int failed_block_index1 = block_index_for_slot[failed_disk1];
696e95a1 RB	287	int failed_block_index2 = block_index_for_slot[failed_disk2];
f2e29ad6 RB	288	if (failed_block_index1 > failed_block_index2) {
	289	int t = failed_block_index1;
	290	failed_block_index1 = failed_block_index2;
	291	failed_block_index2 = t;
	292	}
	293	raid6_2data_recov(raid_disks, chunk_size, failed_block_index1, failed_block_index2, (uint8_t**)blocks);
	294	}
	295	}
351d7680 RB	296
	297	err = lock_stripe(info, start, chunk_size, data_disks, sig);
	298	if(err != 0) {
	299	if (err != 2)
	300	unlock_all_stripes(info, sig);
f2e29ad6 RB	301	goto exitCheck;
f2e29ad6 RB	302	}
351d7680	303
2c7b668d	304	int write_res1, write_res2;
2161adce	305	off64_t seek_res;
2c7b668d	306
2161adce BS	307	seek_res = lseek64(source[failed_disk1],
	308	offsets[failed_disk1] + start * chunk_size, SEEK_SET);
	309	if (seek_res < 0) {
	310	fprintf(stderr, "lseek failed for failed_disk1\n");
	311	unlock_all_stripes(info, sig);
	312	err = -1;
	313	goto exitCheck;
	314	}
2c7b668d	315	write_res1 = write(source[failed_disk1], stripes[failed_disk1], chunk_size);
2161adce	316
2161adce BS	317	seek_res = lseek64(source[failed_disk2],
	318	offsets[failed_disk2] + start * chunk_size, SEEK_SET);
	319	if (seek_res < 0) {
	320	fprintf(stderr, "lseek failed for failed_disk1\n");
	321	unlock_all_stripes(info, sig);
	322	err = -1;
	323	goto exitCheck;
	324	}
2c7b668d	325	write_res2 = write(source[failed_disk2], stripes[failed_disk2], chunk_size);
f2e29ad6	326
8a63c731 RB	327	err = unlock_all_stripes(info, sig);
	328	if(err != 0)
	329	goto exitCheck;
2c7b668d	330
2c7b668d BS	331	if (write_res1 != chunk_size \|\| write_res2 != chunk_size) {
	332	fprintf(stderr, "Failed to write a complete chunk.\n");
	333	goto exitCheck;
	334	}
	335
3b9c9603 PS	336	}
	337
	338	int pages_to_write_count = 0;
	339	int page_to_write[chunk_size >> CHECK_PAGE_BITS];
	340	for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
	341	if (disk[j] >= 0 && repair == AUTO_REPAIR) {
	342	printf("Auto-repairing slot %d (%s)\n", disk[j], name[disk[j]]);
	343	pages_to_write_count++;
	344	page_to_write[j] = 1;
	345	for(i = 0; i < raid_disks; i++) {
	346	blocks_page[i] = blocks[i] + j * CHECK_PAGE_SIZE;
	347	}
	348	if (disk[j] == diskQ) {
21d64813	349	qsyndrome(p, (uint8_t)stripes[diskQ] + j CHECK_PAGE_SIZE, (uint8_t**)blocks_page, data_disks, CHECK_PAGE_SIZE);
3b9c9603 PS	350	} else {
	351	char *all_but_failed_blocks[data_disks];
	352	int failed_block_index = block_index_for_slot[disk[j]];
	353	for (i=0; i < data_disks; i++)
	354	if (failed_block_index == i)
	355	all_but_failed_blocks[i] = stripes[diskP] + j * CHECK_PAGE_SIZE;
	356	else
	357	all_but_failed_blocks[i] = blocks_page[i];
	358	xor_blocks(stripes[disk[j]] + j * CHECK_PAGE_SIZE,
	359	all_but_failed_blocks, data_disks, CHECK_PAGE_SIZE);
	360	}
8a63c731	361	} else {
3b9c9603	362	page_to_write[j] = 0;
8a63c731	363	}
3b9c9603 PS	364	}
	365
	366	if(pages_to_write_count > 0) {
8a63c731 RB	367
	368	err = lock_stripe(info, start, chunk_size, data_disks, sig);
	369	if(err != 0) {
	370	if (err != 2)
	371	unlock_all_stripes(info, sig);
	372	goto exitCheck;
	373	}
	374
3b9c9603 PS	375	int write_res = 0;
	376	for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) {
	377	if(page_to_write[j] == 1) {
	378	lseek64(source[disk[j]], offsets[disk[j]] + start * chunk_size + j * CHECK_PAGE_SIZE, 0);
	379	write_res += write(source[disk[j]], stripes[disk[j]] + j * CHECK_PAGE_SIZE, CHECK_PAGE_SIZE);
	380	}
	381	}
8a63c731	382
351d7680	383	err = unlock_all_stripes(info, sig);
3b9c9603	384	if (err != 0 \|\| write_res != (CHECK_PAGE_SIZE * pages_to_write_count))
f2e29ad6	385	goto exitCheck;
2c7b668d	386
3b9c9603	387	if (write_res != (CHECK_PAGE_SIZE * pages_to_write_count)) {
2c7b668d BS	388	fprintf(stderr, "Failed to write a full chunk.\n");
	389	goto exitCheck;
	390	}
f2e29ad6 RB	391	}
f2e29ad6 RB	392
af3c3750 PS	393	length--;
af3c3750 PS	394	start++;
979afcb8 PS	395	}
979afcb8 PS	396
af3c3750 PS	397	exitCheck:
af3c3750 PS	398
979afcb8 PS	399	free(stripe_buf);
	400	free(stripes);
	401	free(blocks);
3b9c9603	402	free(blocks_page);
3a89d754	403	free(block_index_for_slot);
979afcb8 PS	404	free(p);
	405	free(q);
	406	free(results);
3a89d754	407	free(sig);
979afcb8	408
af3c3750	409	return err;
979afcb8 PS	410	}
	411
	412	unsigned long long getnum(char str, char *err)
	413	{
	414	char *e;
	415	unsigned long long rv = strtoull(str, &e, 10);
	416	if (e==str \|\| *e) {
	417	*err = str;
	418	return 0;
	419	}
	420	return rv;
	421	}
	422
	423	int main(int argc, char *argv[])
	424	{
a9c2c6c6	425	/* md_device start length */
af3c3750 PS	426	int *fds = NULL;
	427	char *buf = NULL;
	428	char **disk_name = NULL;
	429	unsigned long long *offsets = NULL;
	430	int raid_disks = 0;
2cf31121	431	int active_disks;
af3c3750 PS	432	int chunk_size = 0;
af3c3750 PS	433	int layout = -1;
979afcb8	434	int level = 6;
635b5861	435	enum repair repair = NO_REPAIR;
2c7b668d BS	436	int failed_disk1 = -1;
2c7b668d BS	437	int failed_disk2 = -1;
979afcb8 PS	438	unsigned long long start, length;
979afcb8 PS	439	int i;
a9c2c6c6	440	int mdfd;
8d8ab389	441	struct mdinfo info = NULL, comp = NULL;
979afcb8	442	char *err = NULL;
af3c3750 PS	443	int exit_err = 0;
	444	int close_flag = 0;
	445	char *prg = strrchr(argv[0], '/');
	446
	447	if (prg == NULL)
	448	prg = argv[0];
	449	else
	450	prg++;
	451
	452	if (argc < 4) {
8a63c731	453	fprintf(stderr, "Usage: %s md_device start_stripe length_stripes [autorepair]\n", prg);
f2e29ad6	454	fprintf(stderr, " or: %s md_device repair stripe failed_slot_1 failed_slot_2\n", prg);
af3c3750 PS	455	exit_err = 1;
af3c3750 PS	456	goto exitHere;
979afcb8 PS	457	}
979afcb8 PS	458
a9c2c6c6 PS	459	mdfd = open(argv[1], O_RDONLY);
	460	if(mdfd < 0) {
	461	perror(argv[1]);
e7b84f9d	462	fprintf(stderr, "%s: cannot open %s\n", prg, argv[1]);
af3c3750 PS	463	exit_err = 2;
af3c3750 PS	464	goto exitHere;
a9c2c6c6 PS	465	}
a9c2c6c6 PS	466
f8fcf7a1	467	info = sysfs_read(mdfd, NULL,
a9c2c6c6 PS	468	GET_LEVEL\|
	469	GET_LAYOUT\|
	470	GET_DISKS\|
2cf31121	471	GET_DEGRADED \|
a9c2c6c6 PS	472	GET_COMPONENT\|
	473	GET_CHUNK\|
	474	GET_DEVS\|
	475	GET_OFFSET\|
	476	GET_SIZE);
	477
8d8ab389 PS	478	if(info == NULL) {
	479	fprintf(stderr, "%s: Error reading sysfs information of %s\n", prg, argv[1]);
	480	exit_err = 9;
	481	goto exitHere;
	482	}
	483
a9c2c6c6 PS	484	if(info->array.level != level) {
a9c2c6c6 PS	485	fprintf(stderr, "%s: %s not a RAID-6\n", prg, argv[1]);
af3c3750 PS	486	exit_err = 3;
af3c3750 PS	487	goto exitHere;
a9c2c6c6 PS	488	}
a9c2c6c6 PS	489
2cf31121 PS	490	if(info->array.failed_disks > 0) {
	491	fprintf(stderr, "%s: %s degraded array\n", prg, argv[1]);
	492	exit_err = 8;
	493	goto exitHere;
	494	}
	495
a9c2c6c6 PS	496	printf("layout: %d\n", info->array.layout);
a9c2c6c6 PS	497	printf("disks: %d\n", info->array.raid_disks);
af3c3750 PS	498	printf("component size: %llu\n", info->component_size * 512);
af3c3750 PS	499	printf("total stripes: %llu\n", (info->component_size * 512) / info->array.chunk_size);
a9c2c6c6 PS	500	printf("chunk size: %d\n", info->array.chunk_size);
	501	printf("\n");
	502
	503	comp = info->devs;
2cf31121	504	for(i = 0, active_disks = 0; active_disks < info->array.raid_disks; i++) {
a9c2c6c6	505	printf("disk: %d - offset: %llu - size: %llu - name: %s - slot: %d\n",
af3c3750	506	i, comp->data_offset * 512, comp->component_size * 512,
a9c2c6c6 PS	507	map_dev(comp->disk.major, comp->disk.minor, 0),
a9c2c6c6 PS	508	comp->disk.raid_disk);
2cf31121 PS	509	if(comp->disk.raid_disk >= 0)
2cf31121 PS	510	active_disks++;
a9c2c6c6 PS	511	comp = comp->next;
	512	}
	513	printf("\n");
	514
	515	close(mdfd);
	516
	517	raid_disks = info->array.raid_disks;
	518	chunk_size = info->array.chunk_size;
	519	layout = info->array.layout;
f2e29ad6 RB	520	if (strcmp(argv[2], "repair")==0) {
	521	if (argc < 6) {
	522	fprintf(stderr, "For repair mode, call %s md_device repair stripe failed_slot_1 failed_slot_2\n", prg);
	523	exit_err = 1;
	524	goto exitHere;
	525	}
635b5861	526	repair = MANUAL_REPAIR;
f2e29ad6 RB	527	start = getnum(argv[3], &err);
	528	length = 1;
	529	failed_disk1 = getnum(argv[4], &err);
	530	failed_disk2 = getnum(argv[5], &err);
	531
b67e45b8	532	if(failed_disk1 >= info->array.raid_disks) {
f2e29ad6 RB	533	fprintf(stderr, "%s: failed_slot_1 index is higher than number of devices in raid\n", prg);
	534	exit_err = 4;
	535	goto exitHere;
	536	}
b67e45b8	537	if(failed_disk2 >= info->array.raid_disks) {
f2e29ad6 RB	538	fprintf(stderr, "%s: failed_slot_2 index is higher than number of devices in raid\n", prg);
	539	exit_err = 4;
	540	goto exitHere;
	541	}
	542	if(failed_disk1 == failed_disk2) {
	543	fprintf(stderr, "%s: failed_slot_1 and failed_slot_2 are the same\n", prg);
	544	exit_err = 4;
	545	goto exitHere;
	546	}
	547	}
	548	else {
	549	start = getnum(argv[2], &err);
	550	length = getnum(argv[3], &err);
8a63c731	551	if (argc >= 5 && strcmp(argv[4], "autorepair")==0)
635b5861	552	repair = AUTO_REPAIR;
f2e29ad6	553	}
a9c2c6c6	554
979afcb8	555	if (err) {
a9c2c6c6	556	fprintf(stderr, "%s: Bad number: %s\n", prg, err);
af3c3750 PS	557	exit_err = 4;
af3c3750 PS	558	goto exitHere;
979afcb8	559	}
a9c2c6c6	560
af3c3750 PS	561	if(start > ((info->component_size * 512) / chunk_size)) {
	562	start = (info->component_size * 512) / chunk_size;
	563	fprintf(stderr, "%s: start beyond disks size\n", prg);
	564	}
a9c2c6c6	565
af3c3750 PS	566	if((length == 0) \|\|
	567	((length + start) > ((info->component_size * 512) / chunk_size))) {
	568	length = (info->component_size * 512) / chunk_size - start;
979afcb8	569	}
a9c2c6c6	570
503975b9 N	571	disk_name = xmalloc(raid_disks * sizeof(*disk_name));
	572	fds = xmalloc(raid_disks * sizeof(*fds));
	573	offsets = xcalloc(raid_disks, sizeof(*offsets));
	574	buf = xmalloc(raid_disks * chunk_size);
af3c3750	575
af3c3750 PS	576	for(i=0; i<raid_disks; i++) {
	577	fds[i] = -1;
	578	}
	579	close_flag = 1;
979afcb8	580
a9c2c6c6	581	comp = info->devs;
2cf31121	582	for (i=0, active_disks=0; active_disks<raid_disks; i++) {
a9c2c6c6	583	int disk_slot = comp->disk.raid_disk;
2cf31121 PS	584	if(disk_slot >= 0) {
	585	disk_name[disk_slot] = map_dev(comp->disk.major, comp->disk.minor, 0);
	586	offsets[disk_slot] = comp->data_offset * 512;
e645b341	587	fds[disk_slot] = open(disk_name[disk_slot], O_RDWR \| O_SYNC);
2cf31121 PS	588	if (fds[disk_slot] < 0) {
	589	perror(disk_name[disk_slot]);
	590	fprintf(stderr,"%s: cannot open %s\n", prg, disk_name[disk_slot]);
	591	exit_err = 6;
	592	goto exitHere;
	593	}
	594	active_disks++;
979afcb8	595	}
a9c2c6c6	596	comp = comp->next;
979afcb8 PS	597	}
979afcb8 PS	598
8d8ab389	599	int rv = check_stripes(info, fds, offsets,
979afcb8	600	raid_disks, chunk_size, level, layout,
f2e29ad6	601	start, length, disk_name, repair, failed_disk1, failed_disk2);
979afcb8 PS	602	if (rv != 0) {
979afcb8 PS	603	fprintf(stderr,
a9c2c6c6	604	"%s: check_stripes returned %d\n", prg, rv);
af3c3750 PS	605	exit_err = 7;
af3c3750 PS	606	goto exitHere;
979afcb8 PS	607	}
979afcb8 PS	608
af3c3750 PS	609	exitHere:
	610
	611	if (close_flag)
	612	for(i = 0; i < raid_disks; i++)
	613	close(fds[i]);
	614
a9c2c6c6	615	free(disk_name);
979afcb8 PS	616	free(fds);
	617	free(offsets);
	618	free(buf);
	619
af3c3750	620	exit(exit_err);
979afcb8	621	}