diff mbox series

[PULL,V3,2/9] net: Restore printing of the help text with "-nic help"

Message ID 20230217054335.57595-3-jasowang@redhat.com (mailing list archive)
State New, archived
Headers show
Series [PULL,V3,1/9] net: Move the code to collect available NIC models to a separate function | expand

Commit Message

Jason Wang Feb. 17, 2023, 5:43 a.m. UTC 
From: Thomas Huth <thuth@redhat.com>

Running QEMU with "-nic help" used to work in QEMU 5.2 and earlier versions
(it showed the available netdev backends), but this feature got broken during
some refactoring in version 6.0. Let's restore the old behavior, and while
we're at it, let's also print the available NIC models here now since this
option can be used to configure both, netdev backend and model in one go.

Fixes: ad6f932fe8 ("net: do not exit on "netdev_add help" monitor command")
Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 net/net.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/net.c b/net/net.c
index 476a4b7..e8cd95c 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1542,8 +1542,18 @@  static int net_param_nic(void *dummy, QemuOpts *opts, Error **errp)
     const char *type;
 
     type = qemu_opt_get(opts, "type");
-    if (type && g_str_equal(type, "none")) {
-        return 0;    /* Nothing to do, default_net is cleared in vl.c */
+    if (type) {
+        if (g_str_equal(type, "none")) {
+            return 0;    /* Nothing to do, default_net is cleared in vl.c */
+        }
+        if (is_help_option(type)) {
+            GPtrArray *nic_models = qemu_get_nic_models(TYPE_DEVICE);
+            show_netdevs();
+            printf("\n");
+            qemu_show_nic_models(type, (const char **)nic_models->pdata);
+            g_ptr_array_free(nic_models, true);
+            exit(0);
+        }
     }
 
     idx = nic_get_free_idx();