NAME¶

nbd_aio_connect_vsock - connect to the NBD server over AF_VSOCK socket

SYNOPSIS¶

 #include <libnbd.h>
 int nbd_aio_connect_vsock (
       struct nbd_handle *h, uint32_t cid, uint32_t port
     );

DESCRIPTION¶

Begin connecting to the NBD server over the "AF_VSOCK" protocol to the server "cid:port". Parameters behave as documented in nbd_connect_vsock(3).

You can check if the connection attempt is still underway by calling nbd_aio_is_connecting(3). If nbd_set_opt_mode(3) is enabled, the connection is ready for manual option negotiation once nbd_aio_is_negotiating(3) returns true; otherwise, the connection attempt will include the NBD handshake, and is ready for use once nbd_aio_is_ready(3) returns true.

RETURN VALUE¶

If the call is successful the function returns 0.

ERRORS¶

On error "-1" is returned.

Refer to "ERROR HANDLING" in libnbd(3) for how to get further details of the error.

The following parameters must not be NULL: "h". For more information see "Non-NULL parameters" in libnbd(3).

HANDLE STATE¶

The handle must be newly created, otherwise this call will return an error.

VERSION¶

This function first appeared in libnbd 1.2.

If you need to test if this function is available at compile time check if the following macro is defined:

 #define LIBNBD_HAVE_NBD_AIO_CONNECT_VSOCK 1

SEE ALSO¶

nbd_aio_is_connecting(3), nbd_aio_is_negotiating(3), nbd_aio_is_ready(3), nbd_connect_vsock(3), nbd_create(3), nbd_set_opt_mode(3), libnbd(3).

AUTHORS¶

Eric Blake

Richard W.M. Jones

COPYRIGHT¶

Copyright Red Hat

LICENSE¶

This library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA