[md PATCH 09/17] md/raid10: recognise replacements when assembling array.
From: NeilBrown <hidden>
Date: 2011-11-02 05:25:44
Subsystem:
software raid (multiple disks) support, the rest · Maintainers:
Song Liu, Yu Kuai, Linus Torvalds
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 <redacted> --- 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;