qemu/migration/channel.c
Juan Quintela 8e1a1931ca migration: Add comments to channel functions
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
2017-09-22 14:11:18 +02:00

84 lines
2.3 KiB
C

/*
* QEMU live migration channel operations
*
* Copyright Red Hat, Inc. 2016
*
* Authors:
* Daniel P. Berrange <berrange@redhat.com>
*
* 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 "tls.h"
#include "migration.h"
#include "qemu-file-channel.h"
#include "trace.h"
#include "qapi/error.h"
#include "io/channel-tls.h"
/**
* @migration_channel_process_incoming - Create new incoming migration channel
*
* Notice that TLS is special. For it we listen in a listener socket,
* and then create a new client socket from the TLS library.
*
* @ioc: Channel to which we are connecting
*/
void migration_channel_process_incoming(QIOChannel *ioc)
{
MigrationState *s = migrate_get_current();
trace_migration_set_incoming_channel(
ioc, object_get_typename(OBJECT(ioc)));
if (s->parameters.tls_creds &&
*s->parameters.tls_creds &&
!object_dynamic_cast(OBJECT(ioc),
TYPE_QIO_CHANNEL_TLS)) {
Error *local_err = NULL;
migration_tls_channel_process_incoming(s, ioc, &local_err);
if (local_err) {
error_report_err(local_err);
}
} else {
migration_ioc_process_incoming(ioc);
}
}
/**
* @migration_channel_connect - Create new outgoing migration channel
*
* @s: Current migration state
* @ioc: Channel to which we are connecting
* @hostname: Where we want to connect
*/
void migration_channel_connect(MigrationState *s,
QIOChannel *ioc,
const char *hostname)
{
trace_migration_set_outgoing_channel(
ioc, object_get_typename(OBJECT(ioc)), hostname);
if (s->parameters.tls_creds &&
*s->parameters.tls_creds &&
!object_dynamic_cast(OBJECT(ioc),
TYPE_QIO_CHANNEL_TLS)) {
Error *local_err = NULL;
migration_tls_channel_connect(s, ioc, hostname, &local_err);
if (local_err) {
migrate_fd_error(s, local_err);
error_free(local_err);
}
} else {
QEMUFile *f = qemu_fopen_channel_output(ioc);
s->to_dst_file = f;
migrate_fd_connect(s);
}
}