From 547203ead4327b353c25753a3ebb0acdc0ed2cf5 Mon Sep 17 00:00:00 2001 From: Thomas Huth Date: Wed, 21 Feb 2018 11:18:31 +0100 Subject: 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: Paolo Bonzini Reviewed-by: Eric Blake Signed-off-by: Thomas Huth Signed-off-by: Jason Wang --- net/net.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) (limited to 'net') diff --git a/net/net.c b/net/net.c index e213a61975..cf07e15cd4 100644 --- a/net/net.c +++ b/net/net.c @@ -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"); -- cgit v1.2.3-55-g7522