net/tap: Replace tap-haiku.c and tap-aix.c by a generic tap-stub.c

The files tap-haiku.c and tap-aix.c are identical (except one line
of error message). We should avoid such code duplication, so replace
these by a generic tap-stub.c file instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Jason Wang <jasowang@redhat.com>

net/Makefile.objs

@@ -3,13 +3,7 @@ common-obj-y += socket.o
 common-obj-y += dump.o
 common-obj-y += eth.o
 common-obj-$(CONFIG_L2TPV3) += l2tpv3.o
-common-obj-$(CONFIG_POSIX) += tap.o vhost-user.o
-common-obj-$(CONFIG_LINUX) += tap-linux.o
-common-obj-$(CONFIG_WIN32) += tap-win32.o
-common-obj-$(CONFIG_BSD) += tap-bsd.o
-common-obj-$(CONFIG_SOLARIS) += tap-solaris.o
-common-obj-$(CONFIG_AIX) += tap-aix.o
-common-obj-$(CONFIG_HAIKU) += tap-haiku.o
+common-obj-$(CONFIG_POSIX) += vhost-user.o
 common-obj-$(CONFIG_SLIRP) += slirp.o
 common-obj-$(CONFIG_VDE) += vde.o
 common-obj-$(CONFIG_NETMAP) += netmap.o
@@ -20,3 +14,10 @@ common-obj-y += colo-compare.o
 common-obj-y += colo.o
 common-obj-y += filter-rewriter.o
 common-obj-y += filter-replay.o
+
+tap-obj-$(CONFIG_LINUX) = tap-linux.o
+tap-obj-$(CONFIG_BSD) = tap-bsd.o
+tap-obj-$(CONFIG_SOLARIS) = tap-solaris.o
+tap-obj-y ?= tap-stub.o
+common-obj-$(CONFIG_POSIX) += tap.o $(tap-obj-y)
+common-obj-$(CONFIG_WIN32) += tap-win32.o

net/tap-haiku.c

@@ -1,87 +0,0 @@
-/*
- * QEMU System Emulator
- *
- * Copyright (c) 2003-2008 Fabrice Bellard
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
- * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include "qemu/osdep.h"
-#include "qapi/error.h"
-#include "tap_int.h"
-
-int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
-             int vnet_hdr_required, int mq_required, Error **errp)
-{
-    error_setg(errp, "no tap on Haiku");
-    return -1;
-}
-
-void tap_set_sndbuf(int fd, const NetdevTapOptions *tap, Error **errp)
-{
-}
-
-int tap_probe_vnet_hdr(int fd)
-{
-    return 0;
-}
-
-int tap_probe_has_ufo(int fd)
-{
-    return 0;
-}
-
-int tap_probe_vnet_hdr_len(int fd, int len)
-{
-    return 0;
-}
-
-void tap_fd_set_vnet_hdr_len(int fd, int len)
-{
-}
-
-int tap_fd_set_vnet_le(int fd, int is_le)
-{
-    return -EINVAL;
-}
-
-int tap_fd_set_vnet_be(int fd, int is_be)
-{
-    return -EINVAL;
-}
-
-void tap_fd_set_offload(int fd, int csum, int tso4,
-                        int tso6, int ecn, int ufo)
-{
-}
-
-int tap_fd_enable(int fd)
-{
-    return -1;
-}
-
-int tap_fd_disable(int fd)
-{
-    return -1;
-}
-
-int tap_fd_get_ifname(int fd, char *ifname)
-{
-    return -1;
-}

net/tap-stub.c

@@ -29,7 +29,7 @@
 int tap_open(char *ifname, int ifname_size, int *vnet_hdr,
              int vnet_hdr_required, int mq_required, Error **errp)
 {
-    error_setg(errp, "no tap on AIX");
+    error_setg(errp, "tap is not supported in this build");
     return -1;
 }
 
@@ -85,4 +85,3 @@ int tap_fd_get_ifname(int fd, char *ifname)
 {
     return -1;
 }
-