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authorThomas Huth <thuth@redhat.com>2018-02-21 11:18:31 +0100
committerJason Wang <jasowang@redhat.com>2018-03-05 10:30:14 +0800
commit547203ead4327b353c25753a3ebb0acdc0ed2cf5 (patch)
treebb7cdab82f732d0a14ef531dc9c4b93cdf8abe3c /net
parent34f708b0b6bef9ac1e371879a47df5b5fb95726f (diff)
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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 <pbonzini@redhat.com> Reviewed-by: Eric Blake <eblake@redhat.com> Signed-off-by: Thomas Huth <thuth@redhat.com> Signed-off-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'net')
-rw-r--r--net/net.c37
1 files changed, 36 insertions, 1 deletions
diff --git a/net/net.c b/net/net.c
index e213a61..cf07e15 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");