[Devel] [RFC PATCH vz9 v6 56/62] dm-ploop: support REQ_FUA for data pios

[Alexander Atanasov]

If we see a bio with REQ_FUA set we need to request a sync.

https://virtuozzo.atlassian.net/browse/VSTOR-91816
Signed-off-by: Alexander Atanasov <alexander.atanasov at virtuozzo.com>
---
 drivers/md/dm-ploop-map.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/md/dm-ploop-map.c b/drivers/md/dm-ploop-map.c
index c47fa48f1da6..970f0dc52307 100644
--- a/drivers/md/dm-ploop-map.c
+++ b/drivers/md/dm-ploop-map.c
@@ -223,6 +223,14 @@ static void ploop_do_pio_endio(struct pio *pio)
 	if (!atomic_dec_and_test(&pio->remaining))
 		return;
 
+	/* REQ_FUA requires us to flush all before pio is completed */
+	if (pio->bi_op & REQ_FUA) {
+		struct file *file;
+
+		file = ploop_top_delta(pio->ploop)->file;
+		vfs_fsync(file, 1);
+	}
+
 	endio_cb(pio, endio_cb_data, pio->bi_status);
 
 	if (free_on_endio)
-- 
2.43.0