trap signals for "-serial mon:stdio"
[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/sockets.h"
18 #include "migration/migration.h"
19 #include "monitor/monitor.h"
20 #include "migration/qemu-file.h"
21 #include "block/block.h"
22
23 //#define DEBUG_MIGRATION_FD
24
25 #ifdef DEBUG_MIGRATION_FD
26 #define DPRINTF(fmt, ...) \
27 do { printf("migration-fd: " fmt, ## __VA_ARGS__); } while (0)
28 #else
29 #define DPRINTF(fmt, ...) \
30 do { } while (0)
31 #endif
32
33 void fd_start_outgoing_migration(MigrationState *s, const char *fdname, Error **errp)
34 {
35 int fd = monitor_get_fd(cur_mon, fdname, errp);
36 if (fd == -1) {
37 return;
38 }
39 s->file = qemu_fdopen(fd, "wb");
40
41 migrate_fd_connect(s);
42 }
43
44 static void fd_accept_incoming_migration(void *opaque)
45 {
46 QEMUFile *f = opaque;
47
48 qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL);
49 process_incoming_migration(f);
50 }
51
52 void fd_start_incoming_migration(const char *infd, Error **errp)
53 {
54 int fd;
55 QEMUFile *f;
56
57 DPRINTF("Attempting to start an incoming migration via fd\n");
58
59 fd = strtol(infd, NULL, 0);
60 f = qemu_fdopen(fd, "rb");
61 if(f == NULL) {
62 error_setg_errno(errp, errno, "failed to open the source descriptor");
63 return;
64 }
65
66 qemu_set_fd_handler2(fd, NULL, fd_accept_incoming_migration, NULL, f);
67 }