stubdom: drop lwip support

Network support is still provided the same way: using the tap
interface, created in qemu using netfront.
The lwip stack is still available to avoid additional compilation
issues.
However the stubdom is not going to have its own vif anymore,
this means that the only vnc server supported is the one in dom0.
You can still enable the vnc server in a stubdom at compile time, if
you want so.

Probably the most important change caused by this patch to xen users
is that you don't have to specify two vif in the stubdom config file
anymore, but just one:

-vif = [ '', 'ip=10.0.1.1,mac=aa:00:00:12:23:34']
+vif = ['ip=10.0.1.1,mac=aa:00:00:12:23:34']

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>

diff --git a/lib/sys.c b/lib/sys.c
index 7c5f05cd41de0fcee3c0d5a735e0d2bd79083435..12395bf730dda99874d86431d96c75a1b4b8abcb 100644 (file)
--- a/lib/sys.c
+++ b/lib/sys.c
@@ -677,7 +677,7 @@ static int select_poll(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exce
 {
     int i, n = 0;
 #ifdef HAVE_LWIP
-    int sock_n, sock_nfds = 0;
+    int sock_n = 0, sock_nfds = 0;
     fd_set sock_readfds, sock_writefds, sock_exceptfds;
     struct timeval timeout = { .tv_sec = 0, .tv_usec = 0};
 #endif
@@ -711,12 +711,14 @@ static int select_poll(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exce
            }
        }
     }
-    DEBUG("lwip_select(");
-    dump_set(nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
-    DEBUG("); -> ");
-    sock_n = lwip_select(sock_nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
-    dump_set(nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
-    DEBUG("\n");
+    if (sock_nfds > 0) {
+        DEBUG("lwip_select(");
+        dump_set(nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
+        DEBUG("); -> ");
+        sock_n = lwip_select(sock_nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
+        dump_set(nfds, &sock_readfds, &sock_writefds, &sock_exceptfds, &timeout);
+        DEBUG("\n");
+    }
 #endif
 
     /* Then see others as well. */

diff --git a/main.c b/main.c
index 3289c638e4bbad47db1a8e889c293196eb6c39dd..204cf85f8afe0b55b89d7ca7d6a82324e48fa43a 100644 (file)
--- a/main.c
+++ b/main.c
@@ -62,7 +62,7 @@ static void call_main(void *p)
 
 #ifndef CONFIG_GRUB
     sparse((unsigned long) &__app_bss_start, &__app_bss_end - &__app_bss_start);
-#ifdef HAVE_LWIP
+#if defined(HAVE_LWIP) && !defined(CONFIG_QEMU)
     start_networking();
 #endif
     init_fs_frontend();

diff --git a/netfront.c b/netfront.c
index 824c42a7373b399373480d4afc0ebde27ac780a5..a23576937781a6eb7db26550b5e97a40ab299013 100644 (file)
--- a/netfront.c
+++ b/netfront.c
@@ -306,11 +306,16 @@ struct netfront_dev *init_netfront(char *_nodename, void (*thenetif_rx)(unsigned
     int retry=0;
     int i;
     char* msg;
-    char* nodename = _nodename ? _nodename : "device/vif/0";
-
+    char nodename[256];
+    char path[256];
     struct netfront_dev *dev;
+    static int netfrontends = 0;
 
-    char path[strlen(nodename) + 1 + 10 + 1];
+    if (!_nodename)
+        snprintf(nodename, sizeof(nodename), "device/vif/%d", netfrontends);
+    else
+        strncpy(nodename, _nodename, strlen(nodename));
+    netfrontends++;
 
     if (!thenetif_rx)
        thenetif_rx = netif_rx;