diff options
| author | NeilBrown <neilb@suse.de> | 2007-05-23 13:58:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-05-23 20:14:14 -0700 |
| commit | a778b73ff793d34c0082f76110f73a7754915067 (patch) | |
| tree | 54bf868afb3375cfdb0d01d6ce9e5eea47395f85 /drivers/md/md.c | |
| parent | ab6085c795a71b6a21afe7469d30a365338add7a (diff) | |
md: fix bug with linear hot-add and elsewhere
Adding a drive to a linear array seems to have stopped working, due to changes
elsewhere in md, and insufficient ongoing testing...
So the patch to make linear hot-add work in the first place introduced a
subtle bug elsewhere that interracts poorly with older version of mdadm.
This fixes it all up.
Signed-off-by: Neil Brown <neilb@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 20 |
1 files changed, 14 insertions, 6 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index c10ce91b64e..1c54f3c1cca 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -1298,8 +1298,9 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev) ITERATE_RDEV(mddev,rdev2,tmp) if (rdev2->desc_nr+1 > max_dev) max_dev = rdev2->desc_nr+1; - - sb->max_dev = cpu_to_le32(max_dev); + + if (max_dev > le32_to_cpu(sb->max_dev)) + sb->max_dev = cpu_to_le32(max_dev); for (i=0; i<max_dev;i++) sb->dev_roles[i] = cpu_to_le16(0xfffe); @@ -1365,10 +1366,14 @@ static int bind_rdev_to_array(mdk_rdev_t * rdev, mddev_t * mddev) } /* make sure rdev->size exceeds mddev->size */ if (rdev->size && (mddev->size == 0 || rdev->size < mddev->size)) { - if (mddev->pers) - /* Cannot change size, so fail */ - return -ENOSPC; - else + if (mddev->pers) { + /* Cannot change size, so fail + * If mddev->level <= 0, then we don't care + * about aligning sizes (e.g. linear) + */ + if (mddev->level > 0) + return -ENOSPC; + } else mddev->size = rdev->size; } @@ -2142,6 +2147,9 @@ static void analyze_sbs(mddev_t * mddev) rdev->desc_nr = i++; rdev->raid_disk = rdev->desc_nr; set_bit(In_sync, &rdev->flags); + } else if (rdev->raid_disk >= mddev->raid_disks) { + rdev->raid_disk = -1; + clear_bit(In_sync, &rdev->flags); } } |