cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

channel.c (2922B)

      1/*
      2 * QEMU live migration channel operations
      3 *
      4 * Copyright Red Hat, Inc. 2016
      5 *
      6 * Authors:
      7 *  Daniel P. Berrange <berrange@redhat.com>
      8 *
      9 * Contributions after 2012-01-13 are licensed under the terms of the
     10 * GNU GPL, version 2 or (at your option) any later version.
     11 */
     12
     13#include "qemu/osdep.h"
     14#include "channel.h"
     15#include "tls.h"
     16#include "migration.h"
     17#include "qemu-file-channel.h"
     18#include "trace.h"
     19#include "qapi/error.h"
     20#include "io/channel-tls.h"
     21#include "io/channel-socket.h"
     22#include "qemu/yank.h"
     23#include "yank_functions.h"
     24
     25/**
     26 * @migration_channel_process_incoming - Create new incoming migration channel
     27 *
     28 * Notice that TLS is special.  For it we listen in a listener socket,
     29 * and then create a new client socket from the TLS library.
     30 *
     31 * @ioc: Channel to which we are connecting
     32 */
     33void migration_channel_process_incoming(QIOChannel *ioc)
     34{
     35    MigrationState *s = migrate_get_current();
     36    Error *local_err = NULL;
     37
     38    trace_migration_set_incoming_channel(
     39        ioc, object_get_typename(OBJECT(ioc)));
     40
     41    if (s->parameters.tls_creds &&
     42        *s->parameters.tls_creds &&
     43        !object_dynamic_cast(OBJECT(ioc),
     44                             TYPE_QIO_CHANNEL_TLS)) {
     45        migration_tls_channel_process_incoming(s, ioc, &local_err);
     46    } else {
     47        migration_ioc_register_yank(ioc);
     48        migration_ioc_process_incoming(ioc, &local_err);
     49    }
     50
     51    if (local_err) {
     52        error_report_err(local_err);
     53    }
     54}
     55
     56
     57/**
     58 * @migration_channel_connect - Create new outgoing migration channel
     59 *
     60 * @s: Current migration state
     61 * @ioc: Channel to which we are connecting
     62 * @hostname: Where we want to connect
     63 * @error: Error indicating failure to connect, free'd here
     64 */
     65void migration_channel_connect(MigrationState *s,
     66                               QIOChannel *ioc,
     67                               const char *hostname,
     68                               Error *error)
     69{
     70    trace_migration_set_outgoing_channel(
     71        ioc, object_get_typename(OBJECT(ioc)), hostname, error);
     72
     73    if (!error) {
     74        if (s->parameters.tls_creds &&
     75            *s->parameters.tls_creds &&
     76            !object_dynamic_cast(OBJECT(ioc),
     77                                 TYPE_QIO_CHANNEL_TLS)) {
     78            migration_tls_channel_connect(s, ioc, hostname, &error);
     79
     80            if (!error) {
     81                /* tls_channel_connect will call back to this
     82                 * function after the TLS handshake,
     83                 * so we mustn't call migrate_fd_connect until then
     84                 */
     85
     86                return;
     87            }
     88        } else {
     89            QEMUFile *f = qemu_fopen_channel_output(ioc);
     90
     91            migration_ioc_register_yank(ioc);
     92
     93            qemu_mutex_lock(&s->qemu_file_lock);
     94            s->to_dst_file = f;
     95            qemu_mutex_unlock(&s->qemu_file_lock);
     96        }
     97    }
     98    migrate_fd_connect(s, error);
     99    g_free(s->hostname);
    100    error_free(error);
    101}