When external metadata doesn't support BBM, mdadm cannot answer correctly
for BBM requests. It causes reshape process being stopped.
Add ability for external metadata /mdadm/ to disable BBM via sysfs.
md will ignore bad blocks as it is for metadata v0.90.
Signed-off-by: Adam Kwolek <adam.kwolek@xxxxxxxxx>
---
drivers/md/md.c | 11 ++++++++++-
1 files changed, 10 insertions(+), 1 deletions(-)
diff --git a/drivers/md/md.c b/drivers/md/md.c
index 266e82e..6591108 100644
--- a/drivers/md/md.c
+++ b/drivers/md/md.c
@@ -2935,7 +2935,16 @@ static ssize_t bb_show(struct md_rdev *rdev, char *page)
}
static ssize_t bb_store(struct md_rdev *rdev, const char *page, size_t len)
{
- int rv = badblocks_store(&rdev->badblocks, page, len, 0);
+ int rv;
+
+ /* disable bad blocks managment
+ */
+ if (strstr(page, "disable") == page) {
+ bb->shift = -1;
+ return len;
+ }
+
+ rv = badblocks_store(&rdev->badblocks, page, len, 0);
/* Maybe that ack was all we needed */
if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags))
wake_up(&rdev->blocked_wait);
--
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