tree 2e1c7f8a9f2b7ca0b3efd4fee3cac0f1c9f45206
parent 8ce3f7626f96b985142c5e93f9f2dc338b0c21bf
author Stefano Stabellini <sstabellini@kernel.org> 1499364067 -0700
committer Boris Ostrovsky <boris.ostrovsky@oracle.com> 1504187155 -0400

xen/pvcalls: implement accept command

Implement the accept command by calling inet_accept. To avoid blocking
in the kernel, call inet_accept(O_NONBLOCK) from a workqueue, which get
scheduled on sk_data_ready (for a passive socket, it means that there
are connections to accept).

Use the reqcopy field to store the request. Accept the new socket from
the delayed work function, create a new sock_mapping for it, map
the indexes page and data ring, and reply to the other end. Allocate an
ioworker for the socket.

Only support one outstanding blocking accept request for every socket at
any time.

Add a field to sock_mapping to remember the passive socket from which an
active socket was created.

[ boris: fixed whitespaces ]

Signed-off-by: Stefano Stabellini <stefano@aporeto.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>