Store write hint from original bio in stripe head so it can be assigned to
bio sent to each RAID device.
Signed-off-by: Mariusz Dabrowski <mariusz.dabrowski@xxxxxxxxx>
Reviewed-by: Artur Paszkiewicz <artur.paszkiewicz@xxxxxxxxx>
Reviewed-by: Pawel Baldysiak <pawel.baldysiak@xxxxxxxxx>
---
drivers/md/raid5.c | 6 ++++++
drivers/md/raid5.h | 1 +
2 files changed, 7 insertions(+)
diff --git a/drivers/md/raid5.c b/drivers/md/raid5.c
index 50d01144b805..bd99f1651b66 100644
--- a/drivers/md/raid5.c
+++ b/drivers/md/raid5.c
@@ -1139,6 +1139,9 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
bi->bi_io_vec[0].bv_len = STRIPE_SIZE;
bi->bi_io_vec[0].bv_offset = 0;
bi->bi_iter.bi_size = STRIPE_SIZE;
+ bi->bi_write_hint = sh->dev[i].write_hint;
+ if (!rrdev)
+ sh->dev[i].write_hint = 0;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@@ -1190,6 +1193,8 @@ static void ops_run_io(struct stripe_head *sh, struct stripe_head_state *s)
rbi->bi_io_vec[0].bv_len = STRIPE_SIZE;
rbi->bi_io_vec[0].bv_offset = 0;
rbi->bi_iter.bi_size = STRIPE_SIZE;
+ rbi->bi_write_hint = sh->dev[i].write_hint;
+ sh->dev[i].write_hint = 0;
/*
* If this is discard request, set bi_vcnt 0. We don't
* want to confuse SCSI because SCSI will replace payload
@@ -3203,6 +3208,7 @@ static int add_stripe_bio(struct stripe_head *sh, struct bio *bi, int dd_idx,
(unsigned long long)sh->sector);
spin_lock_irq(&sh->stripe_lock);
+ sh->dev[dd_idx].write_hint = bi->bi_write_hint;
/* Don't allow new IO added to stripes in batch list */
if (sh->batch_head)
goto overlap;
diff --git a/drivers/md/raid5.h b/drivers/md/raid5.h
index 2e6123825095..69686616d2ca 100644
--- a/drivers/md/raid5.h
+++ b/drivers/md/raid5.h
@@ -257,6 +257,7 @@ struct stripe_head {
sector_t sector; /* sector of this page */
unsigned long flags;
u32 log_checksum;
+ u32 write_hint;
} dev[1]; /* allocated with extra space depending of RAID geometry */
};
--
2.16.1
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