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[v12,01/10] mirror: inherit supported write/zero flags

Message ID 20190114111744.113188-2-anton.nefedov@virtuozzo.com
State New
Headers show
Series qcow2: cluster space preallocation | expand

Commit Message

Anton Nefedov Jan. 14, 2019, 11:18 a.m. UTC 
Signed-off-by: Anton Nefedov <anton.nefedov@virtuozzo.com>
Reviewed-by: Alberto Garcia <berto@igalia.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
---
 block/mirror.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)
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Patch

diff --git a/block/mirror.c b/block/mirror.c
index f0b211a9c8..7b5a5f13a2 100644
--- a/block/mirror.c
+++ b/block/mirror.c
@@ -1529,8 +1529,12 @@  static void mirror_start_job(const char *job_id, BlockDriverState *bs,
         mirror_top_bs->implicit = true;
     }
     mirror_top_bs->total_sectors = bs->total_sectors;
-    mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED;
-    mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED;
+    mirror_top_bs->supported_write_flags = BDRV_REQ_WRITE_UNCHANGED |
+        (BDRV_REQ_FUA & bs->supported_write_flags);
+    mirror_top_bs->supported_zero_flags = BDRV_REQ_WRITE_UNCHANGED |
+        ((BDRV_REQ_FUA | BDRV_REQ_MAY_UNMAP)
+         & bs->supported_zero_flags);
+
     bs_opaque = g_new0(MirrorBDSOpaque, 1);
     mirror_top_bs->opaque = bs_opaque;
     bdrv_set_aio_context(mirror_top_bs, bdrv_get_aio_context(bs));