mirror of
https://github.com/xemu-project/xemu.git
synced 2024-12-04 09:53:32 +00:00
61053d4826
Currently, incoming migration through fd supports only command-line case:
E.g.
fork();
fd = open();
exec("qemu ... -incoming fd:%d", fd);
It's possible to use add-fd commands to pass fd for migration, but it's
invalid case. add-fd works with fdset but not with particular fds.
To work with getfd in incoming defer it's enough to use monitor_fd_param
instead of strtol. monitor_fd_param supports both cases:
* fd:123
* fd:fd_name (added by getfd).
And also the use of monitor_fd_param improves error messages.
Signed-off-by: Yury Kotov <yury-kotov@yandex-team.ru>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
77 lines
2.0 KiB
C
77 lines
2.0 KiB
C
/*
|
|
* QEMU live migration via generic fd
|
|
*
|
|
* Copyright Red Hat, Inc. 2009-2016
|
|
*
|
|
* Authors:
|
|
* Chris Lalancette <clalance@redhat.com>
|
|
* Daniel P. Berrange <berrange@redhat.com>
|
|
*
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
* the COPYING file in the top-level directory.
|
|
*
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
|
*/
|
|
|
|
#include "qemu/osdep.h"
|
|
#include "channel.h"
|
|
#include "fd.h"
|
|
#include "migration.h"
|
|
#include "monitor/monitor.h"
|
|
#include "io/channel-util.h"
|
|
#include "trace.h"
|
|
|
|
|
|
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
|
|
{
|
|
QIOChannel *ioc;
|
|
int fd = monitor_get_fd(cur_mon, fdname, errp);
|
|
if (fd == -1) {
|
|
return;
|
|
}
|
|
|
|
trace_migration_fd_outgoing(fd);
|
|
ioc = qio_channel_new_fd(fd, errp);
|
|
if (!ioc) {
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-outgoing");
|
|
migration_channel_connect(s, ioc, NULL, NULL);
|
|
object_unref(OBJECT(ioc));
|
|
}
|
|
|
|
static gboolean fd_accept_incoming_migration(QIOChannel *ioc,
|
|
GIOCondition condition,
|
|
gpointer opaque)
|
|
{
|
|
migration_channel_process_incoming(ioc);
|
|
object_unref(OBJECT(ioc));
|
|
return G_SOURCE_REMOVE;
|
|
}
|
|
|
|
void fd_start_incoming_migration(const char *fdname, Error **errp)
|
|
{
|
|
QIOChannel *ioc;
|
|
int fd = monitor_fd_param(cur_mon, fdname, errp);
|
|
if (fd == -1) {
|
|
return;
|
|
}
|
|
|
|
trace_migration_fd_incoming(fd);
|
|
|
|
ioc = qio_channel_new_fd(fd, errp);
|
|
if (!ioc) {
|
|
close(fd);
|
|
return;
|
|
}
|
|
|
|
qio_channel_set_name(QIO_CHANNEL(ioc), "migration-fd-incoming");
|
|
qio_channel_add_watch_full(ioc, G_IO_IN,
|
|
fd_accept_incoming_migration,
|
|
NULL, NULL,
|
|
g_main_context_get_thread_default());
|
|
}
|