migration-exec.c 1.75 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13
/*
 * QEMU live migration
 *
 * Copyright IBM, Corp. 2008
 * Copyright Dell MessageOne 2008
 *
 * Authors:
 *  Anthony Liguori   <aliguori@us.ibm.com>
 *  Charles Duffy     <charles_duffy@messageone.com>
 *
 * This work is licensed under the terms of the GNU GPL, version 2.  See
 * the COPYING file in the top-level directory.
 *
14 15
 * Contributions after 2012-01-13 are licensed under the terms of the
 * GNU GPL, version 2 or (at your option) any later version.
16 17 18
 */

#include "qemu-common.h"
19
#include "qemu/sockets.h"
20
#include "qemu/main-loop.h"
21
#include "migration/migration.h"
22
#include "migration/qemu-file.h"
23
#include "block/block.h"
24 25
#include <sys/types.h>
#include <sys/wait.h>
26 27 28 29

//#define DEBUG_MIGRATION_EXEC

#ifdef DEBUG_MIGRATION_EXEC
malc's avatar
malc committed
30
#define DPRINTF(fmt, ...) \
31 32
    do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
#else
malc's avatar
malc committed
33
#define DPRINTF(fmt, ...) \
34 35 36
    do { } while (0)
#endif

37
void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
38
{
39 40
    s->file = qemu_popen_cmd(command, "w");
    if (s->file == NULL) {
41 42
        error_setg_errno(errp, errno, "failed to popen the migration target");
        return;
43 44 45 46 47
    }

    migrate_fd_connect(s);
}

48
static void exec_accept_incoming_migration(void *opaque)
49
{
50
    QEMUFile *f = opaque;
51

52
    qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL);
53
    process_incoming_migration(f);
54 55
}

56
void exec_start_incoming_migration(const char *command, Error **errp)
57 58 59
{
    QEMUFile *f;

malc's avatar
malc committed
60
    DPRINTF("Attempting to start an incoming migration\n");
61 62
    f = qemu_popen_cmd(command, "r");
    if(f == NULL) {
63 64
        error_setg_errno(errp, errno, "failed to popen the migration source");
        return;
65 66
    }

67
    qemu_set_fd_handler2(qemu_get_fd(f), NULL,
Juan Quintela's avatar
Juan Quintela committed
68
			 exec_accept_incoming_migration, NULL, f);
69
}