[Qemu-devel] [PULL 1/1] nbd/server: fix nbd_co_send_block_status

[Eric Blake <eblake@redhat.com>]

From: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>

Call nbd_co_send_extents() with correct length parameter
(extent.length may be smaller than original length).

Also, switch length parameter type to uint32_t, to correspond with
request->len and similar nbd_co_send_bitmap().

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20180704112302.471456-2-vsementsov@virtuozzo.com>
Signed-off-by: Eric Blake <eblake@redhat.com>
---
 nbd/server.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/nbd/server.c b/nbd/server.c
index e52b76bd1a4..ea5fe0eb336 100644
--- a/nbd/server.c
+++ b/nbd/server.c
@@ -1910,7 +1910,7 @@ static int nbd_co_send_extents(NBDClient *client, uint64_t handle,
 /* Get block status from the exported device and send it to the client */
 static int nbd_co_send_block_status(NBDClient *client, uint64_t handle,
                                     BlockDriverState *bs, uint64_t offset,
-                                    uint64_t length, bool last,
+                                    uint32_t length, bool last,
                                     uint32_t context_id, Error **errp)
 {
     int ret;
@@ -1922,7 +1922,8 @@ static int nbd_co_send_block_status(NBDClient *client, uint64_t handle,
                 client, handle, -ret, "can't get block status", errp);
     }

-    return nbd_co_send_extents(client, handle, &extent, 1, length, last,
+    return nbd_co_send_extents(client, handle, &extent, 1,
+                               be32_to_cpu(extent.length), last,
                                context_id, errp);
 }

-- 
2.14.4