xen/pvcalls: implement connect command
authorStefano Stabellini <sstabellini@kernel.org>
Mon, 30 Oct 2017 22:40:55 +0000 (15:40 -0700)
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>
Tue, 31 Oct 2017 13:05:53 +0000 (09:05 -0400)
commit2295a3fc1e2752828b93032f0674426439762b5d
tree6c8da668a5439ca54d5c6dfb72137c665eb680bc
parent4e6420c88ac287dad98e8b85b60b489bf68e3581
xen/pvcalls: implement connect command

Send PVCALLS_CONNECT to the backend. Allocate a new ring and evtchn for
the active socket.

Introduce fields in struct sock_mapping to keep track of active sockets.
Introduce a waitqueue to allow the frontend to wait on data coming from
the backend on the active socket (recvmsg command).

Two mutexes (one of reads and one for writes) will be used to protect
the active socket in and out rings from concurrent accesses.

Signed-off-by: Stefano Stabellini <stefano@aporeto.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
CC: boris.ostrovsky@oracle.com
CC: jgross@suse.com
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
drivers/xen/pvcalls-front.c
drivers/xen/pvcalls-front.h