netdev - What does -EIOCBQUEUED do?

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Date:	Mon, 13 Aug 2007 22:27:57 +0900
From:	Tetsuo Handa <from-netdev@...ove.SAKURA.ne.jp>
To:	netdev@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: What does -EIOCBQUEUED do?

Hello.

There are several locations that handle
-EIOCBQUEUED error code.
According to include/linux/errno.h ,
it seems this code is NFS related and
caller will receive completion event later.
But I couldn't figure out where is the beginning point
and what is happening.

What functions are called before aio_complete() is called?
(For example, is udp_recvmsg() called if sock_recvmsg() for
UDP socket returned -EIOCBQUEUED?)

What memory regions are accessed before aio_complete() is called?
(For example, is "struct msghdr"->msg_name accessed
if sock_recvmsg() for UDP socket returned -EIOCBQUEUED?)

Regards.
-
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