yank: Remove dependency on qiochannel

Remove dependency on qiochannel by removing yank_generic_iochannel and
letting migration and chardev use their own yank function for
iochannel.

Signed-off-by: Lukas Straub <lukasstraub2@web.de>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20ff143fc2db23e27cd41d38043e481376c9cec1.1616521341.git.lukasstraub2@web.de>

MAINTAINERS

@@ -2823,6 +2823,7 @@ M: Lukas Straub <lukasstraub2@web.de>
 S: Odd fixes
 F: util/yank.c
 F: stubs/yank.c
+F: migration/yank_functions*
 F: include/qemu/yank.h
 F: qapi/yank.json
 

chardev/char-socket.c

@@ -402,6 +402,13 @@ static void remove_hup_source(SocketChardev *s)
     }
 }
 
+static void char_socket_yank_iochannel(void *opaque)
+{
+    QIOChannel *ioc = QIO_CHANNEL(opaque);
+
+    qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
+}
+
 static void tcp_chr_free_connection(Chardev *chr)
 {
     SocketChardev *s = SOCKET_CHARDEV(chr);
@@ -424,7 +431,7 @@ static void tcp_chr_free_connection(Chardev *chr)
         (s->state == TCP_CHARDEV_STATE_CONNECTING
         || s->state == TCP_CHARDEV_STATE_CONNECTED)) {
         yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
-                                 yank_generic_iochannel,
+                                 char_socket_yank_iochannel,
                                  QIO_CHANNEL(s->sioc));
     }
     object_unref(OBJECT(s->sioc));
@@ -946,7 +953,7 @@ static int tcp_chr_add_client(Chardev *chr, int fd)
     tcp_chr_set_client_ioc_name(chr, sioc);
     if (s->registered_yank) {
         yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               yank_generic_iochannel,
+                               char_socket_yank_iochannel,
                                QIO_CHANNEL(sioc));
     }
     ret = tcp_chr_new_client(chr, sioc);
@@ -965,7 +972,7 @@ static void tcp_chr_accept(QIONetListener *listener,
     tcp_chr_set_client_ioc_name(chr, cioc);
     if (s->registered_yank) {
         yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               yank_generic_iochannel,
+                               char_socket_yank_iochannel,
                                QIO_CHANNEL(cioc));
     }
     tcp_chr_new_client(chr, cioc);
@@ -985,7 +992,7 @@ static int tcp_chr_connect_client_sync(Chardev *chr, Error **errp)
     }
     if (s->registered_yank) {
         yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               yank_generic_iochannel,
+                               char_socket_yank_iochannel,
                                QIO_CHANNEL(sioc));
     }
     tcp_chr_new_client(chr, sioc);
@@ -1005,7 +1012,7 @@ static void tcp_chr_accept_server_sync(Chardev *chr)
     tcp_chr_set_client_ioc_name(chr, sioc);
     if (s->registered_yank) {
         yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               yank_generic_iochannel,
+                               char_socket_yank_iochannel,
                                QIO_CHANNEL(sioc));
     }
     tcp_chr_new_client(chr, sioc);
@@ -1138,7 +1145,7 @@ static void qemu_chr_socket_connected(QIOTask *task, void *opaque)
         tcp_chr_change_state(s, TCP_CHARDEV_STATE_DISCONNECTED);
         if (s->registered_yank) {
             yank_unregister_function(CHARDEV_YANK_INSTANCE(chr->label),
-                                     yank_generic_iochannel,
+                                     char_socket_yank_iochannel,
                                      QIO_CHANNEL(sioc));
         }
         check_report_connect_error(chr, err);
@@ -1176,7 +1183,7 @@ static void tcp_chr_connect_client_async(Chardev *chr)
     tcp_chr_set_client_ioc_name(chr, sioc);
     if (s->registered_yank) {
         yank_register_function(CHARDEV_YANK_INSTANCE(chr->label),
-                               yank_generic_iochannel,
+                               char_socket_yank_iochannel,
                                QIO_CHANNEL(sioc));
     }
     /*

include/qemu/yank.h

@@ -73,16 +73,6 @@ void yank_unregister_function(const YankInstance *instance,
                               YankFn *func,
                               void *opaque);
 
-/**
- * yank_generic_iochannel: Generic yank function for iochannel
- *
- * This is a generic yank function which will call qio_channel_shutdown on the
- * provided QIOChannel.
- *
- * @opaque: QIOChannel to shutdown
- */
-void yank_generic_iochannel(void *opaque);
-
 #define BLOCKDEV_YANK_INSTANCE(the_node_name) (&(YankInstance) { \
         .type = YANK_INSTANCE_TYPE_BLOCK_NODE, \
         .u.block_node.node_name = (the_node_name) })

migration/channel.c

@@ -20,6 +20,7 @@
 #include "io/channel-tls.h"
 #include "io/channel-socket.h"
 #include "qemu/yank.h"
+#include "yank_functions.h"
 
 /**
  * @migration_channel_process_incoming - Create new incoming migration channel
@@ -38,7 +39,8 @@ void migration_channel_process_incoming(QIOChannel *ioc)
         ioc, object_get_typename(OBJECT(ioc)));
 
     if (object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_SOCKET)) {
-        yank_register_function(MIGRATION_YANK_INSTANCE, yank_generic_iochannel,
+        yank_register_function(MIGRATION_YANK_INSTANCE,
+                               migration_yank_iochannel,
                                QIO_CHANNEL(ioc));
     }
 
@@ -76,7 +78,7 @@ void migration_channel_connect(MigrationState *s,
     if (!error) {
         if (object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_SOCKET)) {
             yank_register_function(MIGRATION_YANK_INSTANCE,
-                                   yank_generic_iochannel,
+                                   migration_yank_iochannel,
                                    QIO_CHANNEL(ioc));
         }
 

migration/meson.build

@@ -6,6 +6,7 @@ migration_files = files(
   'vmstate.c',
   'qemu-file-channel.c',
   'qemu-file.c',
+  'yank_functions.c',
 )
 softmmu_ss.add(migration_files)
 

migration/multifd.c

@@ -27,6 +27,7 @@
 
 #include "qemu/yank.h"
 #include "io/channel-socket.h"
+#include "yank_functions.h"
 
 /* Multiple fd's */
 
@@ -989,7 +990,7 @@ int multifd_load_cleanup(Error **errp)
         if (object_dynamic_cast(OBJECT(p->c), TYPE_QIO_CHANNEL_SOCKET)
             && OBJECT(p->c)->ref == 1) {
             yank_unregister_function(MIGRATION_YANK_INSTANCE,
-                                     yank_generic_iochannel,
+                                     migration_yank_iochannel,
                                      QIO_CHANNEL(p->c));
         }
 

migration/qemu-file-channel.c

@@ -28,6 +28,7 @@
 #include "io/channel-socket.h"
 #include "qemu/iov.h"
 #include "qemu/yank.h"
+#include "yank_functions.h"
 
 
 static ssize_t channel_writev_buffer(void *opaque,
@@ -108,7 +109,7 @@ static int channel_close(void *opaque, Error **errp)
     if (object_dynamic_cast(OBJECT(ioc), TYPE_QIO_CHANNEL_SOCKET)
         && OBJECT(ioc)->ref == 1) {
         yank_unregister_function(MIGRATION_YANK_INSTANCE,
-                                 yank_generic_iochannel,
+                                 migration_yank_iochannel,
                                  QIO_CHANNEL(ioc));
     }
     object_unref(OBJECT(ioc));

migration/yank_functions.c

@@ -0,0 +1,20 @@
+/*
+ * migration yank functions
+ *
+ * Copyright (c) Lukas Straub <lukasstraub2@web.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "qapi/error.h"
+#include "io/channel.h"
+#include "yank_functions.h"
+
+void migration_yank_iochannel(void *opaque)
+{
+    QIOChannel *ioc = QIO_CHANNEL(opaque);
+
+    qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
+}

migration/yank_functions.h

@@ -0,0 +1,17 @@
+/*
+ * migration yank functions
+ *
+ * Copyright (c) Lukas Straub <lukasstraub2@web.de>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
+/**
+ * migration_yank_iochannel: yank function for iochannel
+ *
+ * This yank function will call qio_channel_shutdown on the provided QIOChannel.
+ *
+ * @opaque: QIOChannel to shutdown
+ */
+void migration_yank_iochannel(void *opaque);

stubs/yank.c

@@ -21,9 +21,3 @@ void yank_unregister_function(const YankInstance *instance,
                               void *opaque)
 {
 }
-
-void yank_generic_iochannel(void *opaque)
-{
-}
-
-

util/yank.c

@@ -15,7 +15,6 @@
 #include "qapi/qapi-commands-yank.h"
 #include "qapi/qapi-visit-yank.h"
 #include "qapi/clone-visitor.h"
-#include "io/channel.h"
 #include "qemu/yank.h"
 
 struct YankFuncAndParam {
@@ -151,13 +150,6 @@ void yank_unregister_function(const YankInstance *instance,
     abort();
 }
 
-void yank_generic_iochannel(void *opaque)
-{
-    QIOChannel *ioc = QIO_CHANNEL(opaque);
-
-    qio_channel_shutdown(ioc, QIO_CHANNEL_SHUTDOWN_BOTH, NULL);
-}
-
 void qmp_yank(YankInstanceList *instances,
               Error **errp)
 {