nbd_supports_vsock3

Usage

 #include <libnbd.h>
 int nbd_supports_vsock (
       struct nbd_handle *h
     );

Overview

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.

Errors

This function does not fail.

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

Version

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:

 #define LIBNBD_HAVE_NBD_SUPPORTS_VSOCK 1