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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>
This commit is contained in:
Christoph Hellwig 2009-04-28 11:57:02 +02:00 committed by Anthony Liguori
parent e8a6aec9b5
commit e7d54ae83c
1 changed files with 10 additions and 1 deletions
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11
posix-aio-compat.c
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@ -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