diff options
| author | Christoph Hellwig <hch@lst.de> | 2009-04-28 11:57:02 +0200 |
|---|---|---|
| committer | Anthony Liguori <aliguori@us.ibm.com> | 2009-05-08 15:51:19 -0500 |
| commit | e7d54ae83c4ffb63a2481d17f136110ab421afc5 (patch) | |
| tree | 5f34bdff519f062441f1eb9b7c0911b63a77483a | |
| parent | e8a6aec9b5e062ca8d14ae0e14efda17ae9685d8 (diff) | |
fix asynchronous ioctls
posix_aio_read expect aio requests to return the number of bytes
requests to be successfull, so we need to fake this up for ioctls.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
| -rw-r--r-- | posix-aio-compat.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/posix-aio-compat.c b/posix-aio-compat.c index c7fdac70b4..e9fc9fa60a 100644 --- a/posix-aio-compat.c +++ b/posix-aio-compat.c @@ -90,7 +90,16 @@ static size_t handle_aiocb_ioctl(struct qemu_paiocb *aiocb) ret = ioctl(aiocb->aio_fildes, aiocb->aio_ioctl_cmd, aiocb->aio_ioctl_buf); if (ret == -1) return -errno; - return ret; + + /* + * This looks weird, but the aio code only consideres a request + * successfull if it has written the number full number of bytes. + * + * Now we overload aio_nbytes as aio_ioctl_cmd for the ioctl command, + * so in fact we return the ioctl command here to make posix_aio_read() + * happy.. + */ + return aiocb->aio_nbytes; } #ifdef HAVE_PREADV |