level, layout);
}
if(disk >= 0) {
- printf("Possible failed disk: %d --> %s\n", disk, name[disk]);
+ printf("Possible failed disk slot: %d --> %s\n", disk, name[disk]);
}
if(disk == -65535) {
printf("Failure detected, but disk unknown\n");
int main(int argc, char *argv[])
{
- /* raid_disks chunk_size layout start length devices...
- */
+ /* md_device start length */
int *fds;
char *buf;
+ char **disk_name;
unsigned long long *offsets;
int raid_disks, chunk_size, layout;
int level = 6;
unsigned long long start, length;
int i;
-
+ int mdfd;
+ struct mdinfo *info, *comp;
char *err = NULL;
- if (argc < 8) {
- fprintf(stderr, "Usage: raid6check raid_disks"
- " chunk_size layout start length devices...\n");
+ const char prg[] = "raid6check";
+
+ if (argc < 3) {
+ fprintf(stderr, "Usage: %s md_device start length\n", prg);
exit(1);
}
- raid_disks = getnum(argv[1], &err);
- chunk_size = getnum(argv[2], &err);
- layout = getnum(argv[3], &err);
- start = getnum(argv[4], &err);
- length = getnum(argv[5], &err);
+ mdfd = open(argv[1], O_RDONLY);
+ if(mdfd < 0) {
+ perror(argv[1]);
+ fprintf(stderr,"%s: cannot open %s\n", prg, argv[1]);
+ exit(4);
+ }
+
+ info = sysfs_read(mdfd, -1,
+ GET_LEVEL|
+ GET_LAYOUT|
+ GET_DISKS|
+ GET_COMPONENT|
+ GET_CHUNK|
+ GET_DEVS|
+ GET_OFFSET|
+ GET_SIZE);
+
+ if(info->array.level != level) {
+ fprintf(stderr, "%s: %s not a RAID-6\n", prg, argv[1]);
+ exit(5);
+ }
+
+ 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("chunk size: %d\n", info->array.chunk_size);
+ printf("\n");
+
+ comp = info->devs;
+ for(i = 0; i < info->array.raid_disks; i++) {
+ printf("disk: %d - offset: %llu - size: %llu - name: %s - slot: %d\n",
+ i, comp->data_offset, comp->component_size*512,
+ map_dev(comp->disk.major, comp->disk.minor, 0),
+ comp->disk.raid_disk);
+
+ comp = comp->next;
+ }
+ printf("\n");
+
+ close(mdfd);
+
+ raid_disks = info->array.raid_disks;
+ chunk_size = info->array.chunk_size;
+ layout = info->array.layout;
+ start = getnum(argv[2], &err);
+ length = getnum(argv[3], &err);
+
if (err) {
- fprintf(stderr, "test_stripe: Bad number: %s\n", err);
+ fprintf(stderr, "%s: Bad number: %s\n", prg, err);
exit(2);
}
- if (argc != raid_disks + 6) {
- fprintf(stderr, "test_stripe: wrong number of devices: want %d found %d\n",
- raid_disks, argc-6);
- exit(2);
+
+ start = (start / chunk_size) * chunk_size;
+
+ if(length == 0) {
+ length = info->component_size * 512 - start;
}
+
+ disk_name = malloc(raid_disks * sizeof(*disk_name));
fds = malloc(raid_disks * sizeof(*fds));
offsets = malloc(raid_disks * sizeof(*offsets));
memset(offsets, 0, raid_disks * sizeof(*offsets));
+ comp = info->devs;
for (i=0; i<raid_disks; i++) {
- char *p;
- p = strchr(argv[6+i], ':');
-
- if(p != NULL) {
- *p++ = '\0';
- offsets[i] = atoll(p) * 512;
- }
- fds[i] = open(argv[6+i], O_RDWR);
- if (fds[i] < 0) {
- perror(argv[6+i]);
- fprintf(stderr,"test_stripe: cannot open %s.\n", argv[6+i]);
+ int disk_slot = comp->disk.raid_disk;
+ 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);
+ if (fds[disk_slot] < 0) {
+ perror(disk_name[disk_slot]);
+ fprintf(stderr,"%s: cannot open %s\n", prg, disk_name[disk_slot]);
exit(3);
}
+
+ comp = comp->next;
}
buf = malloc(raid_disks * chunk_size);
int rv = check_stripes(fds, offsets,
raid_disks, chunk_size, level, layout,
- start, length, &argv[6]);
+ start, length, disk_name);
if (rv != 0) {
fprintf(stderr,
- "test_stripe: test_stripes returned %d\n", rv);
+ "%s: check_stripes returned %d\n", prg, rv);
exit(1);
}
+ free(disk_name);
free(fds);
free(offsets);
free(buf);
+ for(i=0; i<raid_disks; i++)
+ close(fds[i]);
+
exit(0);
}