Revert "net: Do not fill legacy info_str for backends"

Several issues has been reported for query-netdev info
series. Consider it's late in the rc, this reverts commit
f2e8319.

Signed-off-by: Jason Wang <jasowang@redhat.com>

net/l2tpv3.c

@@ -729,6 +729,8 @@ int net_init_l2tpv3(const Netdev *netdev,
 
     QAPI_CLONE_MEMBERS(NetdevL2TPv3Options,
                        &nc->stored_config->u.l2tpv3, l2tpv3);
+
+    s->nc.info_str = g_strdup_printf("l2tpv3: connected");
     return 0;
 outerr:
     qemu_del_net_client(nc);

net/slirp.c

@@ -674,6 +674,9 @@ static int net_slirp_init(NetClientState *peer, const char *model,
         stored->tftp_server_name = g_strdup(tftp_server_name);
     }
 
+    nc->info_str = g_strdup_printf("net=%s,restrict=%s", inet_ntoa(net),
+                                   restricted ? "on" : "off");
+
     s = DO_UPCAST(SlirpState, nc, nc);
 
     s->slirp = slirp_init(restricted, ipv4, net, mask, host,

net/socket.c

@@ -180,6 +180,8 @@ static void net_socket_send(void *opaque)
         s->fd = -1;
         net_socket_rs_init(&s->rs, net_socket_rs_finalize, false);
         s->nc.link_down = true;
+        g_free(s->nc.info_str);
+        s->nc.info_str = g_new0(char, 1);
 
         return;
     }
@@ -399,10 +401,16 @@ static NetSocketState *net_socket_fd_init_dgram(NetClientState *peer,
         stored->mcast = g_strdup(mcast);
 
         s->dgram_dst = saddr;
+        nc->info_str = g_strdup_printf("socket: fd=%d (cloned mcast=%s:%d)",
+                                       fd, inet_ntoa(saddr.sin_addr),
+                                       ntohs(saddr.sin_port));
     } else {
         if (sa_type == SOCKET_ADDRESS_TYPE_UNIX) {
             s->dgram_dst.sin_family = AF_UNIX;
         }
+
+        nc->info_str = g_strdup_printf("socket: fd=%d %s",
+                                       fd, SocketAddressType_str(sa_type));
     }
 
     return s;
@@ -437,6 +445,8 @@ static NetSocketState *net_socket_fd_init_stream(NetClientState *peer,
 
     nc = qemu_new_net_client(&net_socket_info, peer, model, name);
 
+    nc->info_str = g_strdup_printf("socket: fd=%d", fd);
+
     s = DO_UPCAST(NetSocketState, nc, nc);
 
     s->fd = fd;
@@ -518,6 +528,11 @@ static void net_socket_accept(void *opaque)
 
     stored->has_fd = true;
     stored->fd = g_strdup_printf("%d", fd);
+
+    g_free(s->nc.info_str);
+    s->nc.info_str = g_strdup_printf("socket: connection from %s:%d",
+                                     inet_ntoa(saddr.sin_addr),
+                                     ntohs(saddr.sin_port));
 }
 
 static int net_socket_listen_init(NetClientState *peer,
@@ -632,6 +647,10 @@ static int net_socket_connect_init(NetClientState *peer,
     stored->has_connect = true;
     stored->connect = g_strdup(host_str);
 
+    g_free(s->nc.info_str);
+    s->nc.info_str = g_strdup_printf("socket: connect to %s:%d",
+                                     inet_ntoa(saddr.sin_addr),
+                                     ntohs(saddr.sin_port));
     return 0;
 }
 
@@ -688,7 +707,12 @@ static int net_socket_mcast_init(NetClientState *peer,
         stored->localaddr = g_strdup(localaddr_str);
     }
 
+    g_free(s->nc.info_str);
+    s->nc.info_str = g_strdup_printf("socket: mcast=%s:%d",
+                                     inet_ntoa(saddr.sin_addr),
+                                     ntohs(saddr.sin_port));
     return 0;
+
 }
 
 static int net_socket_udp_init(NetClientState *peer,
@@ -749,6 +773,10 @@ static int net_socket_udp_init(NetClientState *peer,
     stored->has_udp = true;
     stored->udp = g_strdup(rhost);
 
+    g_free(s->nc.info_str);
+    s->nc.info_str = g_strdup_printf("socket: udp=%s:%d",
+                                     inet_ntoa(raddr.sin_addr),
+                                     ntohs(raddr.sin_port));
     return 0;
 }
 

net/tap-win32.c

@@ -797,6 +797,8 @@ static int tap_win32_init(NetClientState *peer, const char *model,
     stored->has_ifname = true;
     stored->ifname = g_strdup(ifname);
 
+    s->nc.info_str = g_strdup_printf("tap: ifname=%s", ifname);
+
     s->handle = handle;
 
     qemu_add_wait_object(s->handle->tap_semaphore, tap_win32_send, s);

net/tap.c

@@ -635,6 +635,8 @@ int net_init_bridge(const Netdev *netdev, const char *name,
         stored->helper = g_strdup(helper);
     }
 
+    s->nc.info_str = g_strdup_printf("helper=%s,br=%s", helper, br);
+
     return 0;
 }
 
@@ -720,6 +722,8 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
             stored->fds = g_strdup_printf("%s:%d", stored->fds, fd);
             g_free(tmp_s);
         }
+
+        s->nc.info_str = g_strdup_printf("fd=%d", fd);
     } else if (tap->has_helper) {
         if (!stored->has_helper) {
             stored->has_helper = true;
@@ -731,6 +735,8 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
             stored->br = tap->has_br ? g_strdup(tap->br) :
                                        g_strdup(DEFAULT_BRIDGE_INTERFACE);
         }
+
+        s->nc.info_str = g_strdup_printf("helper=%s", tap->helper);
     } else {
         if (ifname && !stored->has_ifname) {
             stored->has_ifname = true;
@@ -747,6 +753,9 @@ static void net_init_tap_one(const NetdevTapOptions *tap, NetClientState *peer,
             stored->downscript = g_strdup(downscript);
         }
 
+        s->nc.info_str = g_strdup_printf("ifname=%s,script=%s,downscript=%s",
+                                         ifname, script, downscript);
+
         if (strcmp(downscript, "no") != 0) {
             snprintf(s->down_script, sizeof(s->down_script), "%s", downscript);
             snprintf(s->down_script_arg, sizeof(s->down_script_arg),

net/vde.c

@@ -100,6 +100,8 @@ static int net_vde_init(NetClientState *peer, const char *model,
 
     nc = qemu_new_net_client(&net_vde_info, peer, model, name);
 
+    nc->info_str = g_strdup_printf("sock=%s,fd=%d", sock, vde_datafd(vde));
+
     s = DO_UPCAST(VDEState, nc, nc);
 
     s->vde = vde;

net/vhost-user.c

@@ -327,6 +327,7 @@ static int net_vhost_user_init(NetClientState *peer, const char *device,
     user = g_new0(struct VhostUserState, 1);
     for (i = 0; i < queues; i++) {
         nc = qemu_new_net_client(&net_vhost_user_info, peer, device, name);
+        nc->info_str = g_strdup_printf("vhost-user%d to %s", i, chr->label);
         nc->queue_index = i;
         if (!nc0) {
             nc0 = nc;

net/vhost-vdpa.c

@@ -200,6 +200,7 @@ static int net_vhost_vdpa_init(NetClientState *peer, const char *device,
     stored->has_queues = true;
     stored->queues = 1; /* TODO: change when support multiqueue */
 
+    nc->info_str = g_strdup_printf(TYPE_VHOST_VDPA);
     nc->queue_index = 0;
     s = DO_UPCAST(VhostVDPAState, nc, nc);
     vdpa_device_fd = qemu_open_old(vhostdev, O_RDWR);