Add xf86ExtensionInit for DDX extension configuration

xf86ExtensionInit is called after configuration file parsing, so it can
perform the two parts of extension initialisation currently done by
extmod: enabling and disabling of extensions through an 'omit' option,
and SELinux configuration.

Signed-off-by: Daniel Stone <daniel@fooishbar.org>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Signed-off-by: Keith Packard <keithp@keithp.com>

hw/xfree86/common/Makefile.am

@@ -46,6 +46,7 @@ libcommon_la_SOURCES = xf86Configure.c xf86Bus.c xf86Config.c \
                       xf86VidMode.c xf86fbman.c xf86cmap.c \
                       xf86Helper.c xf86PM.c xf86Xinput.c xisb.c \
                       xf86Mode.c xorgHelper.c xf86Extensions.h \
+		      xf86Extensions.c \
                       $(XVSOURCES) $(BUSSOURCES) $(RANDRSOURCES)
 nodist_libcommon_la_SOURCES = xf86DefModeSet.c xf86Build.h
 libcommon_la_LIBADD = $(top_builddir)/config/libconfig.la

hw/xfree86/common/xf86.h

@@ -449,6 +449,9 @@ xf86RandRSetNewVirtualAndDimensions(ScreenPtr pScreen,
                                     Bool resetMode);
 #endif
 
+/* xf86Extensions.c */
+extern void xf86ExtensionInit(void);
+
 /* convert ScreenPtr to ScrnInfoPtr */
 extern _X_EXPORT ScrnInfoPtr xf86ScreenToScrn(ScreenPtr pScreen);
 /* convert ScrnInfoPtr to ScreenPtr */

hw/xfree86/common/xf86Extensions.c

@@ -0,0 +1,82 @@
+/*
+ * Copyright © 2011 Daniel Stone
+ *
+ * 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 (including the next
+ * paragraph) 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.
+ *
+ * Author: Daniel Stone <daniel@fooishbar.org>
+ */
+
+#ifdef HAVE_XORG_CONFIG_H
+#include <xorg-config.h>
+#endif
+
+#include "extension.h"
+#include "globals.h"
+
+#include "xf86.h"
+#include "xf86Config.h"
+#include "xf86Module.h"
+#include "xf86Extensions.h"
+#include "xf86Opt.h"
+#include "optionstr.h"
+
+/*
+ * DDX-specific extensions.
+ */
+static ExtensionModule extensionModules[] = {
+};
+
+static void
+load_extension_config(void)
+{
+    XF86ConfModulePtr mod_con = xf86configptr->conf_modules;
+    XF86LoadPtr modp;
+
+    /* Only the best. */
+    if (!mod_con)
+        return;
+
+    nt_list_for_each_entry(modp, mod_con->mod_load_lst, list.next) {
+        InputOption *opt;
+
+        if (strcasecmp(modp->load_name, "extmod") != 0)
+            continue;
+
+        /* extmod options are of the form "omit <extension-name>" */
+        nt_list_for_each_entry(opt, modp->load_opt, list.next) {
+            const char *key = input_option_get_key(opt);
+            if (strncasecmp(key, "omit", 4) != 0 || strlen(key) < 5)
+                continue;
+            if (EnableDisableExtension(key + 4, FALSE))
+                xf86MarkOptionUsed(opt);
+        }
+    }
+}
+
+void
+xf86ExtensionInit(void)
+{
+    int i;
+
+    load_extension_config();
+
+    for (i = 0; i < ARRAY_SIZE(extensionModules); i++)
+	LoadExtension(&extensionModules[i], TRUE);
+}

hw/xfree86/common/xf86Init.c

@@ -471,6 +471,8 @@ InitOutput(ScreenInfo * pScreenInfo, int argc, char **argv)
         xf86OSPMClose = xf86OSPMOpen();
 #endif
 
+        xf86ExtensionInit();
+
         /* Load all modules specified explicitly in the config file */
         if ((modulelist = xf86ModulelistFromConfig(&optionlist))) {
             xf86LoadModules(modulelist, optionlist);

hw/xfree86/dixmods/extmod/modinit.c

@@ -135,21 +135,6 @@ extmodSetup(pointer module, pointer opts, int *errmaj, int *errmin)
     /* XXX the option stuff here is largely a sample/test case */
 
     for (i = 0; extensionModules[i].name != NULL; i++) {
-        if (opts) {
-            char *s;
-
-            if (asprintf(&s, "omit%s", extensionModules[i].name) != -1) {
-                pointer o;
-
-                o = xf86FindOption(opts, s);
-                free(s);
-                if (o) {
-                    xf86MarkOptionUsed(o);
-                    continue;
-                }
-            }
-        }
-
 #ifdef XSELINUX
         if (!strcmp(SELINUX_EXTENSION_NAME, extensionModules[i].name)) {
             pointer o;