trap signals for "-serial mon:stdio"
[qemu.git] / migration-exec.c
1 /*
2 * QEMU live migration
3 *
4 * Copyright IBM, Corp. 2008
5 * Copyright Dell MessageOne 2008
6 *
7 * Authors:
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Charles Duffy <charles_duffy@messageone.com>
10 *
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
13 *
14 * Contributions after 2012-01-13 are licensed under the terms of the
15 * 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 "migration/migration.h"
21 #include "migration/qemu-file.h"
22 #include "block/block.h"
23 #include <sys/types.h>
24 #include <sys/wait.h>
25
26 //#define DEBUG_MIGRATION_EXEC
27
28 #ifdef DEBUG_MIGRATION_EXEC
29 #define DPRINTF(fmt, ...) \
30 do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
31 #else
32 #define DPRINTF(fmt, ...) \
33 do { } while (0)
34 #endif
35
36 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
37 {
38 s->file = qemu_popen_cmd(command, "w");
39 if (s->file == NULL) {
40 error_setg_errno(errp, errno, "failed to popen the migration target");
41 return;
42 }
43
44 migrate_fd_connect(s);
45 }
46
47 static void exec_accept_incoming_migration(void *opaque)
48 {
49 QEMUFile *f = opaque;
50
51 qemu_set_fd_handler2(qemu_get_fd(f), NULL, NULL, NULL, NULL);
52 process_incoming_migration(f);
53 }
54
55 void exec_start_incoming_migration(const char *command, Error **errp)
56 {
57 QEMUFile *f;
58
59 DPRINTF("Attempting to start an incoming migration\n");
60 f = qemu_popen_cmd(command, "r");
61 if(f == NULL) {
62 error_setg_errno(errp, errno, "failed to popen the migration source");
63 return;
64 }
65
66 qemu_set_fd_handler2(qemu_get_fd(f), NULL,
67 exec_accept_incoming_migration, NULL, f);
68 }