| /* |
| * 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) |
| |
| char const Name[] = "raid6check"; |
| |
| 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); |
| int is_ddf(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, |
| int neg_offset); |
| void raid6_2data_recov(int disks, size_t bytes, int faila, int failb, |
| uint8_t **ptrs, int neg_offset); |
| 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; |
| } |
| |
| /* Autorepair */ |
| int autorepair(int *disk, unsigned long long start, int chunk_size, |
| char *name[], int raid_disks, int syndrome_disks, char **blocks_page, |
| char **blocks, uint8_t *p, int *block_index_for_slot, |
| int *source, unsigned long long *offsets) |
| { |
| int i, j; |
| 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] >= -2 && block_index_for_slot[disk[j]] >= 0) { |
| int slot = block_index_for_slot[disk[j]]; |
| printf("Auto-repairing slot %d (%s)\n", slot, name[slot]); |
| pages_to_write_count++; |
| page_to_write[j] = 1; |
| for(i = -2; i < syndrome_disks; i++) { |
| blocks_page[i] = blocks[i] + j * CHECK_PAGE_SIZE; |
| } |
| if (disk[j] == -2) { |
| qsyndrome(p, (uint8_t*)blocks_page[-2], |
| (uint8_t**)blocks_page, |
| syndrome_disks, CHECK_PAGE_SIZE); |
| } |
| else { |
| char *all_but_failed_blocks[syndrome_disks]; |
| for(i = 0; i < syndrome_disks; i++) { |
| if (i == disk[j]) |
| all_but_failed_blocks[i] = blocks_page[-1]; |
| else |
| all_but_failed_blocks[i] = blocks_page[i]; |
| } |
| xor_blocks(blocks_page[disk[j]], |
| all_but_failed_blocks, syndrome_disks, |
| CHECK_PAGE_SIZE); |
| } |
| } |
| else { |
| page_to_write[j] = 0; |
| } |
| } |
| |
| if(pages_to_write_count > 0) { |
| int write_res = 0; |
| for(j = 0; j < (chunk_size >> CHECK_PAGE_BITS); j++) { |
| if(page_to_write[j] == 1) { |
| int slot = block_index_for_slot[disk[j]]; |
| lseek64(source[slot], offsets[slot] + start * chunk_size + j * CHECK_PAGE_SIZE, SEEK_SET); |
| write_res += write(source[slot], |
| blocks[disk[j]] + j * CHECK_PAGE_SIZE, |
| CHECK_PAGE_SIZE); |
| } |
| } |
| |
| if (write_res != (CHECK_PAGE_SIZE * pages_to_write_count)) { |
| fprintf(stderr, "Failed to write a full chunk.\n"); |
| return -1; |
| } |
| } |
| |
| return 0; |
| } |
| |
| /* Manual repair */ |
| int manual_repair(int chunk_size, int syndrome_disks, |
| int failed_slot1, int failed_slot2, |
| unsigned long long start, int *block_index_for_slot, |
| char *name[], char **stripes, char **blocks, uint8_t *p, |
| int *source, unsigned long long *offsets) |
| { |
| int i; |
| int fd1 = block_index_for_slot[failed_slot1]; |
| int fd2 = block_index_for_slot[failed_slot2]; |
| printf("Repairing stripe %llu\n", start); |
| printf("Assuming slots %d (%s) and %d (%s) are incorrect\n", |
| fd1, name[fd1], |
| fd2, name[fd2]); |
| |
| if (failed_slot1 == -2 || failed_slot2 == -2) { |
| char *all_but_failed_blocks[syndrome_disks]; |
| int failed_data_or_p; |
| |
| if (failed_slot1 == -2) |
| failed_data_or_p = failed_slot2; |
| else |
| failed_data_or_p = failed_slot1; |
| |
| printf("Repairing D/P(%d) and Q\n", failed_data_or_p); |
| |
| for (i = 0; i < syndrome_disks; i++) { |
| if (i == failed_data_or_p) |
| all_but_failed_blocks[i] = blocks[-1]; |
| else |
| all_but_failed_blocks[i] = blocks[i]; |
| } |
| xor_blocks(blocks[failed_data_or_p], |
| all_but_failed_blocks, syndrome_disks, chunk_size); |
| qsyndrome(p, (uint8_t*)blocks[-2], (uint8_t**)blocks, |
| syndrome_disks, chunk_size); |
| } else { |
| ensure_zero_has_size(chunk_size); |
| if (failed_slot1 == -1 || failed_slot2 == -1) { |
| int failed_data; |
| if (failed_slot1 == -1) |
| failed_data = failed_slot2; |
| else |
| failed_data = failed_slot1; |
| |
| printf("Repairing D(%d) and P\n", failed_data); |
| raid6_datap_recov(syndrome_disks+2, chunk_size, |
| failed_data, (uint8_t**)blocks, 1); |
| } else { |
| printf("Repairing D and D\n"); |
| raid6_2data_recov(syndrome_disks+2, chunk_size, |
| failed_slot1, failed_slot2, |
| (uint8_t**)blocks, 1); |
| } |
| } |
| |
| int write_res1, write_res2; |
| off64_t seek_res; |
| |
| seek_res = lseek64(source[fd1], |
| offsets[fd1] + start * chunk_size, SEEK_SET); |
| if (seek_res < 0) { |
| fprintf(stderr, "lseek failed for failed_disk1\n"); |
| return -1; |
| } |
| write_res1 = write(source[fd1], blocks[failed_slot1], chunk_size); |
| |
| seek_res = lseek64(source[fd2], |
| offsets[fd2] + start * chunk_size, SEEK_SET); |
| if (seek_res < 0) { |
| fprintf(stderr, "lseek failed for failed_disk2\n"); |
| return -1; |
| } |
| write_res2 = write(source[fd2], blocks[failed_slot2], chunk_size); |
| |
| if (write_res1 != chunk_size || write_res2 != chunk_size) { |
| fprintf(stderr, "Failed to write a complete chunk.\n"); |
| return -2; |
| } |
| |
| return 0; |
| } |
| |
| 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 */ |
| int data_disks = raid_disks - 2; |
| int syndrome_disks = data_disks + is_ddf(layout) * 2; |
| char *stripe_buf; |
| |
| /* stripes[] is indexed by raid_disk and holds chunks from each device */ |
| char **stripes = xmalloc(raid_disks * sizeof(char*)); |
| |
| /* blocks[] is indexed by syndrome number and points to either one of the |
| * chunks from 'stripes[]', or to a chunk of zeros. -1 and -2 are |
| * P and Q */ |
| char **blocks = xmalloc((syndrome_disks + 2) * sizeof(char*)); |
| |
| /* blocks_page[] is a temporary index to just one page of the chunks |
| * that blocks[] points to. */ |
| char **blocks_page = xmalloc((syndrome_disks + 2) * sizeof(char*)); |
| |
| /* block_index_for_slot[] provides the reverse mapping from blocks to stripes. |
| * The index is a syndrome position, the content is a raid_disk number. |
| * indicies -1 and -2 work, and are P and Q disks */ |
| int *block_index_for_slot = xmalloc((syndrome_disks+2) * sizeof(int)); |
| |
| /* 'p' and 'q' contain calcualted P and Q, to be compared with |
| * blocks[-1] and blocks[-2]; |
| */ |
| uint8_t *p = xmalloc(chunk_size); |
| uint8_t *q = xmalloc(chunk_size); |
| char *zero = xmalloc(chunk_size); |
| int *results = xmalloc(chunk_size * sizeof(int)); |
| sighandler_t *sig = xmalloc(3 * sizeof(sighandler_t)); |
| |
| int i, j; |
| int diskP, diskQ, diskD; |
| int err = 0; |
| |
| extern int tables_ready; |
| |
| if (!tables_ready) |
| make_tables(); |
| |
| if (posix_memalign((void**)&stripe_buf, 4096, raid_disks * chunk_size) != 0) |
| exit(4); |
| block_index_for_slot += 2; |
| blocks += 2; |
| blocks_page += 2; |
| |
| memset(zero, 0, chunk_size); |
| for ( i = 0 ; i < raid_disks ; i++) |
| stripes[i] = stripe_buf + i * chunk_size; |
| |
| while (length > 0) { |
| /* The syndrome number of the broken disk is recorded |
| * in 'disk[]' which allows a different broken disk for |
| * each page. |
| */ |
| 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; |
| } |
| } |
| |
| diskP = geo_map(-1, start, raid_disks, level, layout); |
| block_index_for_slot[-1] = diskP; |
| blocks[-1] = stripes[diskP]; |
| |
| diskQ = geo_map(-2, start, raid_disks, level, layout); |
| block_index_for_slot[-2] = diskQ; |
| blocks[-2] = stripes[diskQ]; |
| |
| if (!is_ddf(layout)) { |
| /* The syndrome-order of disks starts immediately after 'Q', |
| * but skips P */ |
| diskD = diskQ; |
| for (i = 0 ; i < data_disks ; i++) { |
| diskD = diskD + 1; |
| if (diskD >= raid_disks) |
| diskD = 0; |
| if (diskD == diskP) |
| diskD += 1; |
| if (diskD >= raid_disks) |
| diskD = 0; |
| blocks[i] = stripes[diskD]; |
| block_index_for_slot[i] = diskD; |
| } |
| } else { |
| /* The syndrome-order exactly follows raid-disk |
| * numbers, with ZERO in place of P and Q |
| */ |
| for (i = 0 ; i < raid_disks; i++) { |
| if (i == diskP || i == diskQ) { |
| blocks[i] = zero; |
| block_index_for_slot[i] = -1; |
| } else { |
| blocks[i] = stripes[i]; |
| block_index_for_slot[i] = i; |
| } |
| } |
| } |
| |
| qsyndrome(p, q, (uint8_t**)blocks, syndrome_disks, chunk_size); |
| |
| 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++) { |
| int role = disk[j]; |
| if (role >= -2) { |
| int slot = block_index_for_slot[role]; |
| if (slot >= 0) |
| printf("Error detected at stripe %llu, page %d: possible failed disk slot %d: %d --> %s\n", |
| start, j, role, slot, name[slot]); |
| else |
| printf("Error detected at stripe %llu, page %d: failed slot %d should be zeros\n", |
| start, j, role); |
| } else if(disk[j] == -65535) { |
| printf("Error detected at stripe %llu, page %d: disk slot unknown\n", start, j); |
| } |
| } |
| |
| if(repair == AUTO_REPAIR) { |
| err = autorepair(disk, start, chunk_size, |
| name, raid_disks, syndrome_disks, blocks_page, |
| blocks, p, block_index_for_slot, |
| source, offsets); |
| if(err != 0) { |
| unlock_all_stripes(info, sig); |
| goto exitCheck; |
| } |
| } |
| |
| if(repair == MANUAL_REPAIR) { |
| int failed_slot1 = -1, failed_slot2 = -1; |
| for (i = -2; i < syndrome_disks; i++) { |
| if (block_index_for_slot[i] == failed_disk1) |
| failed_slot1 = i; |
| if (block_index_for_slot[i] == failed_disk2) |
| failed_slot2 = i; |
| } |
| err = manual_repair(chunk_size, syndrome_disks, |
| failed_slot1, failed_slot2, |
| start, block_index_for_slot, |
| name, stripes, blocks, p, |
| source, offsets); |
| if(err == -1) { |
| unlock_all_stripes(info, sig); |
| goto exitCheck; |
| } |
| } |
| |
| err = unlock_all_stripes(info, sig); |
| if(err != 0) { |
| goto exitCheck; |
| } |
| |
| length--; |
| start++; |
| } |
| |
| exitCheck: |
| |
| free(stripe_buf); |
| free(stripes); |
| free(blocks-2); |
| free(blocks_page-2); |
| free(block_index_for_slot-2); |
| 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_STATE | |
| 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_DIRECT); |
| 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); |
| } |