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/raid10.c | 17 +++++++++++++++++
1 files changed, 17 insertions(+), 0 deletions(-)
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index fd28f03..15e3f73 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -3195,6 +3195,16 @@ static int run(struct mddev *mddev)
continue;
disk = conf->mirrors + disk_idx;
+ if (test_bit(Replacement, &rdev->flags)) {
+ if (disk->replacement)
+ goto out_free_conf;
+ disk->replacement = rdev;
+ } else {
+ if (disk->rdev)
+ goto out_free_conf;
+ disk->rdev = rdev;
+ }
+
disk->rdev = rdev;
disk_stack_limits(mddev->gendisk, rdev->bdev,
rdev->data_offset << 9);
@@ -3222,6 +3232,13 @@ static int run(struct mddev *mddev)
disk = conf->mirrors + i;
+ if (!disk->rdev && disk->replacement) {
+ /* The replacement is all we have - use it */
+ disk->rdev = disk->replacement;
+ disk->replacement = NULL;
+ clear_bit(Replacement, &disk->rdev->flags);
+ }
+
if (!disk->rdev ||
!test_bit(In_sync, &disk->rdev->flags)) {
disk->head_position = 0;
--
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