[Qemu-devel] [PATCH FYI 42/46] migration: convert savevm to use QIOChannel for writing to files

["Daniel P. Berrange" <berrange@redhat.com>]

Convert the exec savevm code to use QIOChannel and QEMUFileChannel,
instead of the stdio APIs.

Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
---
 migration/savevm.c   |  8 +++++---
 tests/Makefile       |  4 ++--
 tests/test-vmstate.c | 11 ++++++++++-
 3 files changed, 17 insertions(+), 6 deletions(-)

diff --git a/migration/savevm.c b/migration/savevm.c
index 6071215..82febef 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -48,6 +48,7 @@
 #include "qemu/iov.h"
 #include "block/snapshot.h"
 #include "block/qapi.h"
+#include "io/channel-file.h"
 
 
 #ifndef ETH_P_RARP
@@ -1389,6 +1390,7 @@ void hmp_savevm(Monitor *mon, const QDict *qdict)
 void qmp_xen_save_devices_state(const char *filename, Error **errp)
 {
     QEMUFile *f;
+    QIOChannelFile *ioc;
     int saved_vm_running;
     int ret;
 
@@ -1396,11 +1398,11 @@ void qmp_xen_save_devices_state(const char *filename, Error **errp)
     vm_stop(RUN_STATE_SAVE_VM);
     global_state_store_running();
 
-    f = qemu_fopen(filename, "wb");
-    if (!f) {
-        error_setg_file_open(errp, errno, filename);
+    ioc = qio_channel_file_new_path(filename, O_WRONLY | O_CREAT, 0660, errp);
+    if (!ioc) {
         goto the_end;
     }
+    f = qemu_fopen_channel_output(QIO_CHANNEL(ioc));
     ret = qemu_save_device_state(f);
     qemu_fclose(f);
     if (ret < 0) {
diff --git a/tests/Makefile b/tests/Makefile
index 3d1e83c..32b9eac 100644
--- a/tests/Makefile
+++ b/tests/Makefile
@@ -321,8 +321,8 @@ tests/test-qdev-global-props$(EXESUF): tests/test-qdev-global-props.o \
 	$(test-qapi-obj-y)
 tests/test-vmstate$(EXESUF): tests/test-vmstate.o \
 	migration/vmstate.o migration/qemu-file.o \
-        migration/qemu-file-unix.o qjson.o \
-	$(test-qom-obj-y)
+        migration/qemu-file-channel.o qjson.o \
+	$(test-io-obj-y)
 
 tests/test-qapi-types.c tests/test-qapi-types.h :\
 $(SRC_PATH)/tests/qapi-schema/qapi-schema-test.json $(SRC_PATH)/scripts/qapi-types.py $(qapi-py)
diff --git a/tests/test-vmstate.c b/tests/test-vmstate.c
index 0f943d5..6bbda8a 100644
--- a/tests/test-vmstate.c
+++ b/tests/test-vmstate.c
@@ -28,6 +28,7 @@
 #include "migration/migration.h"
 #include "migration/vmstate.h"
 #include "qemu/coroutine.h"
+#include "io/channel-file.h"
 
 static char temp_file[] = "/tmp/vmst.test.XXXXXX";
 static int temp_fd;
@@ -48,11 +49,17 @@ void yield_until_fd_readable(int fd)
 static QEMUFile *open_test_file(bool write)
 {
     int fd = dup(temp_fd);
+    QIOChannel *ioc;
     lseek(fd, 0, SEEK_SET);
     if (write) {
         g_assert_cmpint(ftruncate(fd, 0), ==, 0);
     }
-    return qemu_fdopen(fd, write ? "wb" : "rb");
+    ioc = QIO_CHANNEL(qio_channel_file_new_fd(fd));
+    if (write) {
+        return qemu_fopen_channel_output(ioc);
+    } else {
+        return qemu_fopen_channel_input(ioc);
+    }
 }
 
 #define SUCCESS(val) \
@@ -468,6 +475,8 @@ int main(int argc, char **argv)
 {
     temp_fd = mkstemp(temp_file);
 
+    module_call_init(MODULE_INIT_QOM);
+
     g_test_init(&argc, &argv, NULL);
     g_test_add_func("/vmstate/simple/primitive", test_simple_primitive);
     g_test_add_func("/vmstate/versioned/load/v1", test_load_v1);
-- 
2.4.3