From: Yu Kuai <yukuai3@xxxxxxxxxx>
The helper will be used in later patches for raid1/raid10/raid5, the
difference is that Faulty rdev with unacknowledged bad block will not
be considered blocked.
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
---
drivers/md/md.h | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/drivers/md/md.h b/drivers/md/md.h
index 5d2e6bd58e4d..4ba93af36126 100644
--- a/drivers/md/md.h
+++ b/drivers/md/md.h
@@ -1002,6 +1002,30 @@ static inline void mddev_trace_remap(struct mddev *mddev, struct bio *bio,
trace_block_bio_remap(bio, disk_devt(mddev->gendisk), sector);
}
+static inline bool rdev_blocked(struct md_rdev *rdev)
+{
+ /*
+ * Blocked will be set by error handler and cleared by daemon after
+ * updating superblock, meanwhile write IO should be blocked to prevent
+ * reading old data after power failure.
+ */
+ if (test_bit(Blocked, &rdev->flags))
+ return true;
+
+ /*
+ * Faulty device should not be accessed anymore, there is no need to
+ * wait for bad block to be acknowledged.
+ */
+ if (test_bit(Faulty, &rdev->flags))
+ return false;
+
+ /* rdev is blocked by badblocks. */
+ if (test_bit(BlockedBadBlocks, &rdev->flags))
+ return true;
+
+ return false;
+}
+
#define mddev_add_trace_msg(mddev, fmt, args...) \
do { \
if (!mddev_is_dm(mddev)) \
--
2.39.2
