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migration: convert savevm to use QIOChannel for writing to files

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

Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
Message-Id: <1461751518-12128-19-git-send-email-berrange@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Daniel P. Berrange 2016-04-27 11:05:08 +01:00 committed by Amit Shah
parent 6ddd2d76ca
commit 8925839f00
3 changed files with 17 additions and 6 deletions
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8
migration/savevm.c
View File

@ -52,6 +52,7 @@
#include "block/qapi.h"
#include "qemu/cutils.h"
#include "io/channel-buffer.h"
#include "io/channel-file.h"
#ifndef ETH_P_RARP
#define ETH_P_RARP 0x8035
@ -2046,6 +2047,7 @@ 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;
@ -2053,11 +2055,11 @@ 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) {

4
tests/Makefile
View File

@ -439,8 +439,8 @@ 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 migration/qjson.o \
$(test-qom-obj-y)
migration/qemu-file-channel.o migration/qjson.o \
$(test-io-obj-y)
tests/test-timed-average$(EXESUF): tests/test-timed-average.o qemu-timer.o \
$(test-util-obj-y)
tests/test-base64$(EXESUF): tests/test-base64.o \

11
tests/test-vmstate.c
View File

@ -29,6 +29,7 @@
#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;
@ -49,11 +50,17 @@ 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) \
@ -469,6 +476,8 @@ 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);