nbd_supports_vsock - Man Page

true if libnbd was compiled with support for AF_VSOCK


 #include <libnbd.h>

 int nbd_supports_vsock (
       struct nbd_handle *h


Returns true if libnbd was compiled with support for the AF_VSOCK family of sockets, or false if not.

Note that on the Linux operating system, this returns true if there is compile-time support, but you may still need runtime support for some aspects of AF_VSOCK usage; for example, use of VMADDR_CID_LOCAL as the server name requires that the vsock_loopback kernel module is loaded.

Return Value

This call returns a boolean value.


This function does not fail.

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


This function first appeared in libnbd 1.16.

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


See Also

nbd_connect_uri(3), nbd_connect_vsock(3), nbd_create(3), libnbd(3).


Eric Blake

Richard W.M. Jones


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

Referenced By

libnbd(3), libnbd-release-notes-1.16(1), NBD(3), nbd_connect_uri(3), nbd_connect_vsock(3).

2024-04-04 libnbd-1.20.0