[02/19] xen: Create a new file xen_frontend.c

diff --git a/hw/block/xen_disk.c b/hw/block/xen_disk.c
index 90aca73..28fbf24 100644
--- a/hw/block/xen_disk.c
+++ b/hw/block/xen_disk.c
@@ -25,6 +25,7 @@ 
 
 #include "hw/hw.h"
 #include "hw/xen/xen_backend.h"
+#include "hw/xen/xen_frontend.h"
 #include "xen_blkif.h"
 #include "sysemu/blockdev.h"
 #include "sysemu/block-backend.h"
diff --git a/hw/display/xenfb.c b/hw/display/xenfb.c
index 46b7d5e..5751113 100644
--- a/hw/display/xenfb.c
+++ b/hw/display/xenfb.c
@@ -30,6 +30,7 @@ 
 #include "ui/console.h"
 #include "sysemu/char.h"
 #include "hw/xen/xen_backend.h"
+#include "hw/xen/xen_frontend.h"
 
 #include <xen/event_channel.h>
 #include <xen/io/fbif.h>
diff --git a/hw/net/xen_nic.c b/hw/net/xen_nic.c
index 0b4ddae..bdfa789 100644
--- a/hw/net/xen_nic.c
+++ b/hw/net/xen_nic.c
@@ -29,6 +29,7 @@ 
 #include "net/checksum.h"
 #include "net/util.h"
 #include "hw/xen/xen_backend.h"
+#include "hw/xen/xen_frontend.h"
 
 #include <xen/io/netif.h>
 
diff --git a/hw/xen/Makefile.objs b/hw/xen/Makefile.objs
index 591cdc2..1000294 100644
--- a/hw/xen/Makefile.objs
+++ b/hw/xen/Makefile.objs
@@ -1,5 +1,5 @@ 
 # xen backend driver support
-common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o xen_devconfig.o xen_pvdev.o
+common-obj-$(CONFIG_XEN_BACKEND) += xen_backend.o xen_frontend.o xen_devconfig.o xen_pvdev.o
 
 obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen-host-pci-device.o
 obj-$(CONFIG_XEN_PCI_PASSTHROUGH) += xen_pt.o xen_pt_config_init.o xen_pt_graphics.o xen_pt_msi.o
diff --git a/hw/xen/xen_backend.c b/hw/xen/xen_backend.c
index a251a4a..7a83a7d 100644
--- a/hw/xen/xen_backend.c
+++ b/hw/xen/xen_backend.c
@@ -30,6 +30,7 @@ 
 #include "sysemu/char.h"
 #include "qemu/log.h"
 #include "hw/xen/xen_backend.h"
+#include "hw/xen/xen_frontend.h"
 #include "hw/xen/xen_pvdev.h"
 
 #include <xen/grant_table.h>
@@ -124,21 +125,6 @@  int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival)
     return xenstore_read_int(xendev->be, node, ival);
 }
 
-char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node)
-{
-    return xenstore_read_str(xendev->fe, node);
-}
-
-int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival)
-{
-    return xenstore_read_int(xendev->fe, node, ival);
-}
-
-int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval)
-{
-    return xenstore_read_uint64(xendev->fe, node, uval);
-}
-
 /* ------------------------------------------------------------- */
 
 int xen_be_set_state(struct XenDevice *xendev, enum xenbus_state state)
@@ -301,37 +287,6 @@  static void xen_be_backend_changed(struct XenDevice *xendev, const char *node)
     }
 }
 
-static void xen_be_frontend_changed(struct XenDevice *xendev, const char *node)
-{
-    int fe_state;
-
-    if (node == NULL  ||  strcmp(node, "state") == 0) {
-        if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) {
-            fe_state = XenbusStateUnknown;
-        }
-        if (xendev->fe_state != fe_state) {
-            xen_be_printf(xendev, 1, "frontend state: %s -> %s\n",
-                          xenbus_strstate(xendev->fe_state),
-                          xenbus_strstate(fe_state));
-        }
-        xendev->fe_state = fe_state;
-    }
-    if (node == NULL  ||  strcmp(node, "protocol") == 0) {
-        g_free(xendev->protocol);
-        xendev->protocol = xenstore_read_fe_str(xendev, "protocol");
-        if (xendev->protocol) {
-            xen_be_printf(xendev, 1, "frontend protocol: %s\n", xendev->protocol);
-        }
-    }
-
-    if (node) {
-        xen_be_printf(xendev, 2, "frontend update: %s\n", node);
-        if (xendev->ops->frontend_changed) {
-            xendev->ops->frontend_changed(xendev, node);
-        }
-    }
-}
-
 /* ------------------------------------------------------------- */
 /* Check for possible state transitions and perform them.        */
 
diff --git a/hw/xen/xen_frontend.c b/hw/xen/xen_frontend.c
new file mode 100644
index 0000000..b4bf8da
--- /dev/null
+++ b/hw/xen/xen_frontend.c
@@ -0,0 +1,70 @@ 
+/*
+ * Xen frontend driver infrastructure
+ *
+ *  (c) 2008 Gerd Hoffmann <kraxel@redhat.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ */
+
+#include "qemu/osdep.h"
+
+#include "hw/xen/xen_pvdev.h"
+#include "hw/xen/xen_frontend.h"
+#include "hw/xen/xen_backend.h"
+
+char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node)
+{
+    return xenstore_read_str(xendev->fe, node);
+}
+
+int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival)
+{
+    return xenstore_read_int(xendev->fe, node, ival);
+}
+
+int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval)
+{
+    return xenstore_read_uint64(xendev->fe, node, uval);
+}
+
+void xen_be_frontend_changed(struct XenDevice *xendev, const char *node)
+{
+    int fe_state;
+
+    if (node == NULL  ||  strcmp(node, "state") == 0) {
+        if (xenstore_read_fe_int(xendev, "state", &fe_state) == -1) {
+            fe_state = XenbusStateUnknown;
+        }
+        if (xendev->fe_state != fe_state) {
+            xen_be_printf(xendev, 1, "frontend state: %s -> %s\n",
+                          xenbus_strstate(xendev->fe_state),
+                          xenbus_strstate(fe_state));
+        }
+        xendev->fe_state = fe_state;
+    }
+    if (node == NULL  ||  strcmp(node, "protocol") == 0) {
+        g_free(xendev->protocol);
+        xendev->protocol = xenstore_read_fe_str(xendev, "protocol");
+        if (xendev->protocol) {
+            xen_be_printf(xendev, 1, "frontend protocol: %s\n", xendev->protocol);
+        }
+    }
+
+    if (node) {
+        xen_be_printf(xendev, 2, "frontend update: %s\n", node);
+        if (xendev->ops->frontend_changed) {
+            xendev->ops->frontend_changed(xendev, node);
+        }
+    }
+}
diff --git a/include/hw/xen/xen_backend.h b/include/hw/xen/xen_backend.h
index 0f009e3..0daaf7c 100644
--- a/include/hw/xen/xen_backend.h
+++ b/include/hw/xen/xen_backend.h
@@ -19,9 +19,6 @@  int xenstore_write_be_int(struct XenDevice *xendev, const char *node, int ival);
 int xenstore_write_be_int64(struct XenDevice *xendev, const char *node, int64_t ival);
 char *xenstore_read_be_str(struct XenDevice *xendev, const char *node);
 int xenstore_read_be_int(struct XenDevice *xendev, const char *node, int *ival);
-char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
-int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
-int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval);
 
 struct XenDevice *xen_be_find_xendev(const char *type, int dom, int dev);
 void xen_be_check_state(struct XenDevice *xendev);
diff --git a/include/hw/xen/xen_frontend.h b/include/hw/xen/xen_frontend.h
new file mode 100644
index 0000000..46485b9
--- /dev/null
+++ b/include/hw/xen/xen_frontend.h
@@ -0,0 +1,10 @@ 
+#ifndef QEMU_HW_XEN_FRONTEND_H
+#define QEMU_HW_XEN_FRONTEND_H 1
+
+char *xenstore_read_fe_str(struct XenDevice *xendev, const char *node);
+int xenstore_read_fe_int(struct XenDevice *xendev, const char *node, int *ival);
+int xenstore_read_fe_uint64(struct XenDevice *xendev, const char *node, uint64_t *uval);
+
+void xen_be_frontend_changed(struct XenDevice *xendev, const char *node);
+
+#endif /* QEMU_HW_XEN_FRONTEND_H */