qga: fix false negative argument passing
[qemu.git] / migration-fd.c
1 /*
2 * QEMU live migration via generic fd
3 *
4 * Copyright Red Hat, Inc. 2009
5 *
6 * Authors:
7 * Chris Lalancette <clalance@redhat.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 * Contributions after 2012-01-13 are licensed under the terms of the
13 * 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 //#define DEBUG_MIGRATION_FD
25
26 #ifdef DEBUG_MIGRATION_FD
27 #define DPRINTF(fmt, ...) \
28 do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
29 #else
30 #define DPRINTF(fmt, ...) \
31 do { } while (0)
32 #endif
33
34 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
35 {
36 int fd = monitor_get_fd(cur_mon, fdname, errp);
37 if (fd == -1) {
38 return;
39 }
40 s->file = qemu_fdopen(fd, "wb");
41
42 migrate_fd_connect(s);
43 }
44
45 static void fd_accept_incoming_migration(void *opaque)
46 {
47 QEMUFile *f = opaque;
48
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 int fd;
56 QEMUFile *f;
57
58 DPRINTF("Attempting to start an incoming migration via fd\n");
59
60 fd = strtol(infd, NULL, 0);
61 f = qemu_fdopen(fd, "rb");
62 if(f == NULL) {
63 error_setg_errno(errp, errno, "failed to open the source descriptor");
64 return;
65 }
66
67 qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f);
68 }