If a Replacement is seen, file it as such.
If we see two replacements (or two normal devices) for the one slot,
abort.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
---
drivers/md/raid5.c | 10 +++++++++-
1 files changed, 9 insertions(+), 1 deletions(-)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 6c22f09..efe3679 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -4824,7 +4824,15 @@ static struct r5conf *setup_conf(struct mddev *mddev)
continue;
disk = conf->disks + raid_disk;
- disk->rdev = rdev;
+ if (test_bit(Replacement, &rdev->flags)) {
+ if (disk->replacement)
+ goto abort;
+ disk->replacement = rdev;
+ } else {
+ if (disk->rdev)
+ goto abort;
+ disk->rdev = rdev;
+ }
if (test_bit(In_sync, &rdev->flags)) {
char b[BDEVNAME_SIZE];
--
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