static MigrationState *current_migration;
+static NotifierList migration_state_notifiers =
+ NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
+
int qemu_start_incoming_migration(const char *uri)
{
const char *p;
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
- incoming_expected = false;
-
- if (autostart)
+ if (autostart) {
vm_start();
+ } else {
+ runstate_set(RUN_STATE_PRELAUNCH);
+ }
}
+static MigrationState *migrate_new(Monitor *mon, int64_t bandwidth_limit,
+ int detach, int blk, int inc);
+
int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
MigrationState *s = NULL;
int blk = qdict_get_try_bool(qdict, "blk", 0);
int inc = qdict_get_try_bool(qdict, "inc", 0);
const char *uri = qdict_get_str(qdict, "uri");
+ int ret;
if (current_migration &&
current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) {
return -1;
}
+ if (qemu_savevm_state_blocked(mon)) {
+ return -1;
+ }
+
+ s = migrate_new(mon, max_throttle, detach, blk, inc);
+
if (strstart(uri, "tcp:", &p)) {
- s = tcp_start_outgoing_migration(mon, p, max_throttle, detach,
- blk, inc);
+ ret = tcp_start_outgoing_migration(s, p);
#if !defined(WIN32)
} else if (strstart(uri, "exec:", &p)) {
- s = exec_start_outgoing_migration(mon, p, max_throttle, detach,
- blk, inc);
+ ret = exec_start_outgoing_migration(s, p);
} else if (strstart(uri, "unix:", &p)) {
- s = unix_start_outgoing_migration(mon, p, max_throttle, detach,
- blk, inc);
+ ret = unix_start_outgoing_migration(s, p);
} else if (strstart(uri, "fd:", &p)) {
- s = fd_start_outgoing_migration(mon, p, max_throttle, detach,
- blk, inc);
+ ret = fd_start_outgoing_migration(s, p);
#endif
} else {
monitor_printf(mon, "unknown migration protocol: %s\n", uri);
- return -1;
+ ret = -EINVAL;
+ goto free_migrate_state;
}
- if (s == NULL) {
+ if (ret < 0) {
monitor_printf(mon, "migration failed\n");
- return -1;
+ goto free_migrate_state;
}
if (current_migration) {
}
current_migration = s;
+ notifier_list_notify(&migration_state_notifiers, NULL);
return 0;
+free_migrate_state:
+ g_free(s);
+ return -1;
}
int do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
MigrationState *s = current_migration;
- if (s)
+ if (s && s->get_status(s) == MIG_STATE_ACTIVE) {
s->cancel(s);
-
+ }
return 0;
}
int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
int64_t d;
- FdMigrationState *s;
+ MigrationState *s;
d = qdict_get_int(qdict, "value");
if (d < 0) {
}
max_throttle = d;
- s = migrate_to_fms(current_migration);
+ s = current_migration;
if (s && s->file) {
qemu_file_set_rate_limit(s->file, max_throttle);
}
void do_info_migrate(Monitor *mon, QObject **ret_data)
{
QDict *qdict;
- MigrationState *s = current_migration;
- if (s) {
- switch (s->get_status(s)) {
+ if (current_migration) {
+ MigrationState *s = current_migration;
+
+ switch (s->get_status(current_migration)) {
case MIG_STATE_ACTIVE:
qdict = qdict_new();
qdict_put(qdict, "status", qstring_from_str("active"));
/* shared migration helpers */
-void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
+static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
{
s->mon = mon;
if (monitor_suspend(mon) == 0) {
}
}
-void migrate_fd_error(FdMigrationState *s)
-{
- DPRINTF("setting error state\n");
- s->state = MIG_STATE_ERROR;
- migrate_fd_cleanup(s);
-}
-
-int migrate_fd_cleanup(FdMigrationState *s)
+static int migrate_fd_cleanup(MigrationState *s)
{
int ret = 0;
ret = -1;
}
s->file = NULL;
+ } else {
+ if (s->mon) {
+ monitor_resume(s->mon);
+ }
}
- if (s->fd != -1)
+ if (s->fd != -1) {
close(s->fd);
-
- /* Don't resume monitor until we've flushed all of the buffers */
- if (s->mon) {
- monitor_resume(s->mon);
+ s->fd = -1;
}
- s->fd = -1;
-
return ret;
}
-void migrate_fd_put_notify(void *opaque)
+void migrate_fd_error(MigrationState *s)
+{
+ DPRINTF("setting error state\n");
+ s->state = MIG_STATE_ERROR;
+ notifier_list_notify(&migration_state_notifiers, NULL);
+ migrate_fd_cleanup(s);
+}
+
+static void migrate_fd_put_notify(void *opaque)
{
- FdMigrationState *s = opaque;
+ MigrationState *s = opaque;
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
qemu_file_put_notify(s->file);
+ if (qemu_file_get_error(s->file)) {
+ migrate_fd_error(s);
+ }
}
-ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size)
+static ssize_t migrate_fd_put_buffer(void *opaque, const void *data,
+ size_t size)
{
- FdMigrationState *s = opaque;
+ MigrationState *s = opaque;
ssize_t ret;
+ if (s->state != MIG_STATE_ACTIVE) {
+ return -EIO;
+ }
+
do {
ret = s->write(s, data, size);
} while (ret == -1 && ((s->get_error(s)) == EINTR));
if (ret == -EAGAIN) {
qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
- } else if (ret < 0) {
- if (s->mon) {
- monitor_resume(s->mon);
- }
- s->state = MIG_STATE_ERROR;
}
return ret;
}
-void migrate_fd_connect(FdMigrationState *s)
+static void migrate_fd_put_ready(void *opaque)
{
+ MigrationState *s = opaque;
int ret;
- s->file = qemu_fopen_ops_buffered(s,
- s->bandwidth_limit,
- migrate_fd_put_buffer,
- migrate_fd_put_ready,
- migrate_fd_wait_for_unfreeze,
- migrate_fd_close);
-
- DPRINTF("beginning savevm\n");
- ret = qemu_savevm_state_begin(s->mon, s->file, s->mig_state.blk,
- s->mig_state.shared);
- if (ret < 0) {
- DPRINTF("failed, %d\n", ret);
- migrate_fd_error(s);
- return;
- }
-
- migrate_fd_put_ready(s);
-}
-
-void migrate_fd_put_ready(void *opaque)
-{
- FdMigrationState *s = opaque;
-
if (s->state != MIG_STATE_ACTIVE) {
DPRINTF("put_ready returning because of non-active state\n");
return;
}
DPRINTF("iterate\n");
- if (qemu_savevm_state_iterate(s->mon, s->file) == 1) {
- int state;
- int old_vm_running = vm_running;
+ ret = qemu_savevm_state_iterate(s->mon, s->file);
+ if (ret < 0) {
+ migrate_fd_error(s);
+ } else if (ret == 1) {
+ int old_vm_running = runstate_is_running();
DPRINTF("done iterating\n");
- vm_stop(0);
+ vm_stop(RUN_STATE_FINISH_MIGRATE);
if ((qemu_savevm_state_complete(s->mon, s->file)) < 0) {
if (old_vm_running) {
vm_start();
}
- state = MIG_STATE_ERROR;
- } else {
- state = MIG_STATE_COMPLETED;
+ s->state = MIG_STATE_ERROR;
}
if (migrate_fd_cleanup(s) < 0) {
if (old_vm_running) {
vm_start();
}
- state = MIG_STATE_ERROR;
+ s->state = MIG_STATE_ERROR;
}
- s->state = state;
+ if (s->state == MIG_STATE_ACTIVE) {
+ s->state = MIG_STATE_COMPLETED;
+ runstate_set(RUN_STATE_POSTMIGRATE);
+ }
+ notifier_list_notify(&migration_state_notifiers, NULL);
}
}
-int migrate_fd_get_status(MigrationState *mig_state)
+static int migrate_fd_get_status(MigrationState *s)
{
- FdMigrationState *s = migrate_to_fms(mig_state);
return s->state;
}
-void migrate_fd_cancel(MigrationState *mig_state)
+static void migrate_fd_cancel(MigrationState *s)
{
- FdMigrationState *s = migrate_to_fms(mig_state);
-
if (s->state != MIG_STATE_ACTIVE)
return;
DPRINTF("cancelling migration\n");
s->state = MIG_STATE_CANCELLED;
+ notifier_list_notify(&migration_state_notifiers, NULL);
qemu_savevm_state_cancel(s->mon, s->file);
migrate_fd_cleanup(s);
}
-void migrate_fd_release(MigrationState *mig_state)
+static void migrate_fd_release(MigrationState *s)
{
- FdMigrationState *s = migrate_to_fms(mig_state);
DPRINTF("releasing state\n");
if (s->state == MIG_STATE_ACTIVE) {
s->state = MIG_STATE_CANCELLED;
+ notifier_list_notify(&migration_state_notifiers, NULL);
migrate_fd_cleanup(s);
}
- qemu_free(s);
+ g_free(s);
}
-void migrate_fd_wait_for_unfreeze(void *opaque)
+static void migrate_fd_wait_for_unfreeze(void *opaque)
{
- FdMigrationState *s = opaque;
+ MigrationState *s = opaque;
int ret;
DPRINTF("wait for unfreeze\n");
ret = select(s->fd + 1, NULL, &wfds, NULL, NULL);
} while (ret == -1 && (s->get_error(s)) == EINTR);
+
+ if (ret == -1) {
+ qemu_file_set_error(s->file, -s->get_error(s));
+ }
}
-int migrate_fd_close(void *opaque)
+static int migrate_fd_close(void *opaque)
{
- FdMigrationState *s = opaque;
+ MigrationState *s = opaque;
+ if (s->mon) {
+ monitor_resume(s->mon);
+ }
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
return s->close(s);
}
+
+void add_migration_state_change_notifier(Notifier *notify)
+{
+ notifier_list_add(&migration_state_notifiers, notify);
+}
+
+void remove_migration_state_change_notifier(Notifier *notify)
+{
+ notifier_list_remove(&migration_state_notifiers, notify);
+}
+
+int get_migration_state(void)
+{
+ if (current_migration) {
+ return migrate_fd_get_status(current_migration);
+ } else {
+ return MIG_STATE_ERROR;
+ }
+}
+
+void migrate_fd_connect(MigrationState *s)
+{
+ int ret;
+
+ s->file = qemu_fopen_ops_buffered(s,
+ s->bandwidth_limit,
+ migrate_fd_put_buffer,
+ migrate_fd_put_ready,
+ migrate_fd_wait_for_unfreeze,
+ migrate_fd_close);
+
+ DPRINTF("beginning savevm\n");
+ ret = qemu_savevm_state_begin(s->mon, s->file, s->blk, s->shared);
+ if (ret < 0) {
+ DPRINTF("failed, %d\n", ret);
+ migrate_fd_error(s);
+ return;
+ }
+ migrate_fd_put_ready(s);
+}
+
+static MigrationState *migrate_new(Monitor *mon, int64_t bandwidth_limit,
+ int detach, int blk, int inc)
+{
+ MigrationState *s = g_malloc0(sizeof(*s));
+
+ s->cancel = migrate_fd_cancel;
+ s->get_status = migrate_fd_get_status;
+ s->release = migrate_fd_release;
+ s->blk = blk;
+ s->shared = inc;
+ s->mon = NULL;
+ s->bandwidth_limit = bandwidth_limit;
+ s->state = MIG_STATE_ACTIVE;
+
+ if (!detach) {
+ migrate_fd_monitor_suspend(s, mon);
+ }
+
+ return s;
+}
projects / qemu.git / blobdiff