migration-fd.c 1.64 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11
/*
 * QEMU live migration via generic fd
 *
 * Copyright Red Hat, Inc. 2009
 *
 * Authors:
 *  Chris Lalancette <clalance@redhat.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
12 13
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
14 15 16
 */

#include "qemu-common.h"
17
#include "qemu/main-loop.h"
18
#include "qemu/sockets.h"
19
#include "migration/migration.h"
20
#include "monitor/monitor.h"
21
#include "migration/qemu-file.h"
22
#include "block/block.h"
23 24 25 26

//#define DEBUG_MIGRATION_FD

#ifdef DEBUG_MIGRATION_FD
malc's avatar
malc committed
27
#define DPRINTF(fmt, ...) \
28 29
    do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
#else
malc's avatar
malc committed
30
#define DPRINTF(fmt, ...) \
31 32 33
    do { } while (0)
#endif

34
void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
35
{
36 37
    int fd = monitor_get_fd(cur_mon, fdname, errp);
    if (fd == -1) {
38
        return;
39
    }
40
    s->file = qemu_fdopen(fd, "wb");
41 42 43 44 45 46 47 48

    migrate_fd_connect(s);
}

static void fd_accept_incoming_migration(void *opaque)
{
    QEMUFile *f = opaque;

49
    qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL);
50
    process_incoming_migration(f);
51 52
}

53
void fd_start_incoming_migration(const char *infd, Error **errp)
54 55 56 57
{
    int fd;
    QEMUFile *f;

malc's avatar
malc committed
58
    DPRINTF("Attempting to start an incoming migration via fd\n");
59 60 61 62

    fd = strtol(infd, NULL, 0);
    f = qemu_fdopen(fd, "rb");
    if(f == NULL) {
63 64
        error_setg_errno(errp, errno, "failed to open the source descriptor");
        return;
65 66
    }

Juan Quintela's avatar
Juan Quintela committed
67
    qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f);
68
}