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md: don't allow arrays to contain devices with bad blocks.

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As no personality understand bad block lists yet, we must
reject any device that is known to contain bad blocks.
As the personalities get taught, these tests can be removed.

This only applies to raid1/raid5/raid10.
For linear/raid0/multipath/faulty the whole concept of bad blocks
doesn't mean anything so there is no point adding the checks.

Signed-off-by: NeilBrown <neilb@suse.de>
Reviewed-by: Namhyung Kim <namhyung@gmail.com>
This commit is contained in:
NeilBrown 2011-07-28 11:31:47 +10:00
parent 6e0d2d0312
commit 34b343cff4
3 changed files with 22 additions and 0 deletions
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7
drivers/md/raid1.c
View File

@ -1055,6 +1055,9 @@ static int raid1_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
if (mddev->recovery_disabled == conf->recovery_disabled)
return -EBUSY;
if (rdev->badblocks.count)
return -EINVAL;
if (rdev->raid_disk >= 0)
first = last = rdev->raid_disk;
@ -1994,6 +1997,10 @@ static int run(mddev_t *mddev)
blk_queue_segment_boundary(mddev->queue,
PAGE_CACHE_SIZE - 1);
}
if (rdev->badblocks.count) {
printk(KERN_ERR "md/raid1: Cannot handle bad blocks yet\n");
return -EINVAL;
}
}
mddev->degraded = 0;

8
drivers/md/raid10.c
View File

@ -1101,6 +1101,9 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
int first = 0;
int last = conf->raid_disks - 1;
if (rdev->badblocks.count)
return -EINVAL;
if (mddev->recovery_cp < MaxSector)
/* only hot-add to in-sync arrays, as recovery is
* very different from resync
@ -2263,6 +2266,11 @@ static int run(mddev_t *mddev)
(conf->raid_disks / conf->near_copies));
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (rdev->badblocks.count) {
printk(KERN_ERR "md/raid10: cannot handle bad blocks yet\n");
goto out_free_conf;
}
disk_idx = rdev->raid_disk;
if (disk_idx >= conf->raid_disks
|| disk_idx < 0)

7
drivers/md/raid5.c
View File

@ -4667,6 +4667,10 @@ static int run(mddev_t *mddev)
* 0 for a fully functional array, 1 or 2 for a degraded array.
*/
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (rdev->badblocks.count) {
printk(KERN_ERR "md/raid5: cannot handle bad blocks yet\n");
goto abort;
}
if (rdev->raid_disk < 0)
continue;
if (test_bit(In_sync, &rdev->flags)) {
@ -4975,6 +4979,9 @@ static int raid5_add_disk(mddev_t *mddev, mdk_rdev_t *rdev)
int first = 0;
int last = conf->raid_disks - 1;
if (rdev->badblocks.count)
return -EINVAL;
if (has_failed(conf))
/* no point adding a device */
return -EINVAL;