Commit 547203ea authored by Thomas Huth's avatar Thomas Huth Committed by Jason Wang
Browse files

net: List available netdevs with "-netdev help" 



Other options like "-chardev" or "-device" feature a nice help text
with the available devices when being called with "help" or "?".
Since it is quite useful, especially if you want to see which network
backends have been compiled into the QEMU binary, let's provide such
a help text for "-netdev", too.

Reviewed-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Reviewed-by: default avatarEric Blake <eblake@redhat.com>
Signed-off-by: default avatarThomas Huth <thuth@redhat.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
parent 34f708b0

net/net.c

+36 −1
Original line number Diff line number Diff line
@@ -1086,6 +1086,38 @@ static int net_client_init1(const void *object, bool is_netdev, Error **errp) 
    return 0;

}



static void show_netdevs(void)

{

    int idx;

    const char *available_netdevs[] = {

        "socket",

        "hubport",

        "tap",

#ifdef CONFIG_SLIRP

        "user",

#endif

#ifdef CONFIG_L2TPV3

        "l2tpv3",

#endif

#ifdef CONFIG_VDE

        "vde",

#endif

#ifdef CONFIG_NET_BRIDGE

        "bridge",

#endif

#ifdef CONFIG_NETMAP

        "netmap",

#endif

#ifdef CONFIG_POSIX

        "vhost-user",

#endif

    };



    printf("Available netdev backend types:\n");

    for (idx = 0; idx < ARRAY_SIZE(available_netdevs); idx++) {

        puts(available_netdevs[idx]);

    }

}



int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp)

{
@@ -1094,7 +1126,10 @@ int net_client_init(QemuOpts *opts, bool is_netdev, Error **errp) 
    int ret = -1;

    Visitor *v = opts_visitor_new(opts);



    {

    if (is_netdev && is_help_option(qemu_opt_get(opts, "type"))) {

        show_netdevs();

        exit(0);

    } else {

        /* Parse convenience option format ip6-net=fec0::0[/64] */

        const char *ip6_net = qemu_opt_get(opts, "ipv6-net");