[Qemu-devel] [PATCH 1/1] block: fix return code for partial write for Linux AIO

["Denis V. Lunev" <den@openvz.org>]

Partial write most likely means that there is not space rather than
"something wrong happens". Thus it would be more natural to return
ENOSPC rather than EINVAL.

The problem actually happens with NBD server, which has reported EINVAL
rather then ENOSPC on the first error using its protocol, which makes
report to the user wrong.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Pavel Borzenkov <pborzenkov@virtuozzo.com>
CC: Kevin Wolf <kwolf@redhat.com>
CC: Max Reitz <mreitz@redhat.com>
---
 block/linux-aio.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/block/linux-aio.c b/block/linux-aio.c
index e468960..7df8651 100644
--- a/block/linux-aio.c
+++ b/block/linux-aio.c
@@ -87,7 +87,7 @@ static void qemu_laio_process_completion(struct qemu_laiocb *laiocb)
                 qemu_iovec_memset(laiocb->qiov, ret, 0,
                     laiocb->qiov->size - ret);
             } else {
-                ret = -EINVAL;
+                ret = -ENOSPC;
             }
         }
     }
-- 
2.5.0