diff options
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index bae42331182d..36c05ba7855a 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -3176,13 +3176,33 @@ static int do_md_run(mddev_t * mddev) * Drop all container device buffers, from now on * the only valid external interface is through the md * device. - * Also find largest hardsector size */ ITERATE_RDEV(mddev,rdev,tmp) { if (test_bit(Faulty, &rdev->flags)) continue; sync_blockdev(rdev->bdev); invalidate_bdev(rdev->bdev); + + /* perform some consistency tests on the device. + * We don't want the data to overlap the metadata, + * Internal Bitmap issues has handled elsewhere. + */ + if (rdev->data_offset < rdev->sb_offset) { + if (mddev->size && + rdev->data_offset + mddev->size*2 + > rdev->sb_offset*2) { + printk("md: %s: data overlaps metadata\n", + mdname(mddev)); + return -EINVAL; + } + } else { + if (rdev->sb_offset*2 + rdev->sb_size/512 + > rdev->data_offset) { + printk("md: %s: metadata overlaps data\n", + mdname(mddev)); + return -EINVAL; + } + } } md_probe(mddev->unit, NULL, NULL); |