xref: /openbmc/qemu/migration/exec.c (revision 2e1cacfb)
1 /*
2  * QEMU live migration
3  *
4  * Copyright IBM, Corp. 2008
5  * Copyright Dell MessageOne 2008
6  * Copyright Red Hat, Inc. 2015-2016
7  *
8  * Authors:
9  *  Anthony Liguori   <aliguori@us.ibm.com>
10  *  Charles Duffy     <charles_duffy@messageone.com>
11  *  Daniel P. Berrange <berrange@redhat.com>
12  *
13  * This work is licensed under the terms of the GNU GPL, version 2.  See
14  * the COPYING file in the top-level directory.
15  *
16  * Contributions after 2012-01-13 are licensed under the terms of the
17  * GNU GPL, version 2 or (at your option) any later version.
18  */
19 
20 #include "qemu/osdep.h"
21 #include "qapi/type-helpers.h"
22 #include "qemu/error-report.h"
23 #include "channel.h"
24 #include "exec.h"
25 #include "migration.h"
26 #include "io/channel-command.h"
27 #include "trace.h"
28 #include "qemu/cutils.h"
29 
30 #ifdef WIN32
31 const char *exec_get_cmd_path(void)
32 {
33     g_autofree char *detected_path = g_new(char, MAX_PATH);
34     if (GetSystemDirectoryA(detected_path, MAX_PATH) == 0) {
35         warn_report("Could not detect cmd.exe path, using default.");
36         return "C:\\Windows\\System32\\cmd.exe";
37     }
38     pstrcat(detected_path, MAX_PATH, "\\cmd.exe");
39     return g_steal_pointer(&detected_path);
40 }
41 #endif
42 
43 void exec_start_outgoing_migration(MigrationState *s, strList *command,
44                                    Error **errp)
45 {
46     QIOChannel *ioc = NULL;
47     g_auto(GStrv) argv = strv_from_str_list(command);
48     const char * const *args = (const char * const *) argv;
49     g_autofree char *new_command = g_strjoinv(" ", (char **)argv);
50 
51     trace_migration_exec_outgoing(new_command);
52     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp));
53     if (!ioc) {
54         return;
55     }
56 
57     qio_channel_set_name(ioc, "migration-exec-outgoing");
58     migration_channel_connect(s, ioc, NULL, NULL);
59     object_unref(OBJECT(ioc));
60 }
61 
62 static gboolean exec_accept_incoming_migration(QIOChannel *ioc,
63                                                GIOCondition condition,
64                                                gpointer opaque)
65 {
66     migration_channel_process_incoming(ioc);
67     object_unref(OBJECT(ioc));
68     return G_SOURCE_REMOVE;
69 }
70 
71 void exec_start_incoming_migration(strList *command, Error **errp)
72 {
73     QIOChannel *ioc;
74     g_auto(GStrv) argv = strv_from_str_list(command);
75     const char * const *args = (const char * const *) argv;
76     g_autofree char *new_command = g_strjoinv(" ", (char **)argv);
77 
78     trace_migration_exec_incoming(new_command);
79     ioc = QIO_CHANNEL(qio_channel_command_new_spawn(args, O_RDWR, errp));
80     if (!ioc) {
81         return;
82     }
83 
84     qio_channel_set_name(ioc, "migration-exec-incoming");
85     qio_channel_add_watch_full(ioc, G_IO_IN,
86                                exec_accept_incoming_migration,
87                                NULL, NULL,
88                                g_main_context_get_thread_default());
89 }
90