From ba1b41b6b4e30cb66ae2775faadea05cae3ce61c Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Fri, 14 Jan 2011 09:14:34 +1100 Subject: [PATCH] md: range check slot number when manually adding a spare. When adding a spare to an active array, we should check the slot number, but allow it to be larger than raid_disks if a reshape is being prepared. Apply the same test when adding a device to an array-under-construction. It already had most of the test in place, but not quite all. Signed-off-by: NeilBrown --- drivers/md/md.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index 5e3714fecee9..665851308818 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -2479,6 +2479,10 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len) if (rdev2->raid_disk == slot) return -EEXIST; + if (slot >= rdev->mddev->raid_disks && + slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) + return -ENOSPC; + rdev->raid_disk = slot; if (test_bit(In_sync, &rdev->flags)) rdev->saved_raid_disk = slot; @@ -2496,7 +2500,8 @@ slot_store(mdk_rdev_t *rdev, const char *buf, size_t len) /* failure here is OK */; /* don't wakeup anyone, leave that to userspace. */ } else { - if (slot >= rdev->mddev->raid_disks) + if (slot >= rdev->mddev->raid_disks && + slot >= rdev->mddev->raid_disks + rdev->mddev->delta_disks) return -ENOSPC; rdev->raid_disk = slot; /* assume it is working */