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md: add a new helper rdev_blocked()

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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@huawei.com>
Tested-by: Mariusz Tkaczyk <mariusz.tkaczyk@linux.intel.com>
Link: https://lore.kernel.org/r/20241031033114.3845582-2-yukuai1@huaweicloud.com
Signed-off-by: Song Liu <song@kernel.org>
This commit is contained in:
Yu Kuai 2024-10-31 11:31:08 +08:00 committed by Song Liu
parent 1e79892e76
commit 4abfce19c7
1 changed files with 24 additions and 0 deletions
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24
drivers/md/md.h
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@ -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)) \