coroutine-sigaltstack: Change jmp_buf to sigjmp_buf
[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 "qemu/main-loop.h"
21 #include "migration/migration.h"
22 #include "migration/qemu-file.h"
23 #include "block/block.h"
24 #include <sys/types.h>
25 #include <sys/wait.h>
26
27 //#define DEBUG_MIGRATION_EXEC
28
29 #ifdef DEBUG_MIGRATION_EXEC
30 #define DPRINTF(fmt, ...) \
31 do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
32 #else
33 #define DPRINTF(fmt, ...) \
34 do { } while (0)
35 #endif
36
37 void exec_start_outgoing_migration(MigrationState *s, const char *command, Error **errp)
38 {
39 s->file = qemu_popen_cmd(command, "w");
40 if (s->file == NULL) {
41 error_setg_errno(errp, errno, "failed to popen the migration target");
42 return;
43 }
44
45 migrate_fd_connect(s);
46 }
47
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 QEMUFile *f;
59
60 DPRINTF("Attempting to start an incoming migration\n");
61 f = qemu_popen_cmd(command, "r");
62 if(f == NULL) {
63 error_setg_errno(errp, errno, "failed to popen the migration source");
64 return;
65 }
66
67 qemu_set_fd_handler2(qemu_get_fd(f), NULL,
68 exec_accept_incoming_migration, NULL, f);
69 }