4 * Copyright IBM, Corp. 2008
5 * Copyright Dell MessageOne 2008
8 * Anthony Liguori <aliguori@us.ibm.com>
9 * Charles Duffy <charles_duffy@messageone.com>
11 * This work is licensed under the terms of the GNU GPL, version 2. See
12 * the COPYING file in the top-level directory.
16 #include "qemu-common.h"
17 #include "qemu_socket.h"
18 #include "migration.h"
19 #include "qemu-char.h"
22 #include "buffered_file.h"
25 //#define DEBUG_MIGRATION_EXEC
27 #ifdef DEBUG_MIGRATION_EXEC
28 #define dprintf(fmt, ...) \
29 do { printf("migration-exec: " fmt, ## __VA_ARGS__); } while (0)
31 #define dprintf(fmt, ...) \
35 static int file_errno(FdMigrationState
*s
)
40 static int file_write(FdMigrationState
*s
, const void * buf
, size_t size
)
42 return write(s
->fd
, buf
, size
);
45 static int exec_close(FdMigrationState
*s
)
47 dprintf("exec_close\n");
49 qemu_fclose(s
->opaque
);
56 MigrationState
*exec_start_outgoing_migration(const char *command
,
57 int64_t bandwidth_limit
,
63 s
= qemu_mallocz(sizeof(*s
));
65 dprintf("Unable to allocate FdMigrationState\n");
69 f
= popen(command
, "w");
71 dprintf("Unable to popen exec target\n");
77 dprintf("Unable to retrieve file descriptor for popen'd handle\n");
81 if (fcntl(s
->fd
, F_SETFD
, O_NONBLOCK
) == -1) {
82 dprintf("Unable to set nonblocking mode on file descriptor\n");
86 s
->opaque
= qemu_popen(f
, "w");
88 s
->close
= exec_close
;
89 s
->get_error
= file_errno
;
90 s
->write
= file_write
;
91 s
->mig_state
.cancel
= migrate_fd_cancel
;
92 s
->mig_state
.get_status
= migrate_fd_get_status
;
93 s
->mig_state
.release
= migrate_fd_release
;
95 s
->state
= MIG_STATE_ACTIVE
;
97 s
->bandwidth_limit
= bandwidth_limit
;
100 dprintf("detaching from monitor\n");
105 migrate_fd_connect(s
);
106 return &s
->mig_state
;
116 int exec_start_incoming_migration(const char *command
)
121 dprintf("Attempting to start an incoming migration\n");
122 f
= qemu_popen_cmd(command
, "r");
124 dprintf("Unable to apply qemu wrapper to popen file\n");
127 vm_stop(0); /* just in case */
128 ret
= qemu_loadvm_state(f
);
130 fprintf(stderr
, "load of migration failed\n");
133 qemu_announce_self();
134 dprintf("successfully loaded vm state\n");