#endif
/* Migration speed throttling */
-static uint32_t max_throttle = (32 << 20);
+static int64_t max_throttle = (32 << 20);
static MigrationState *current_migration;
-void qemu_start_incoming_migration(const char *uri)
+static NotifierList migration_state_notifiers =
+ NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
+
+int qemu_start_incoming_migration(const char *uri)
{
const char *p;
+ int ret;
if (strstart(uri, "tcp:", &p))
- tcp_start_incoming_migration(p);
+ ret = tcp_start_incoming_migration(p);
#if !defined(WIN32)
else if (strstart(uri, "exec:", &p))
- exec_start_incoming_migration(p);
+ ret = exec_start_incoming_migration(p);
else if (strstart(uri, "unix:", &p))
- unix_start_incoming_migration(p);
+ ret = unix_start_incoming_migration(p);
else if (strstart(uri, "fd:", &p))
- fd_start_incoming_migration(p);
+ ret = fd_start_incoming_migration(p);
#endif
- else
+ else {
fprintf(stderr, "unknown migration protocol: %s\n", uri);
+ ret = -EPROTONOSUPPORT;
+ }
+ return ret;
+}
+
+void process_incoming_migration(QEMUFile *f)
+{
+ if (qemu_loadvm_state(f) < 0) {
+ fprintf(stderr, "load of migration failed\n");
+ exit(0);
+ }
+ qemu_announce_self();
+ DPRINTF("successfully loaded vm state\n");
+
+ if (autostart) {
+ vm_start();
+ } else {
+ runstate_set(RUN_STATE_PRELAUNCH);
+ }
}
-void do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
+int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
- MigrationState *s = NULL;
+ FdMigrationState *s = NULL;
const char *p;
- int detach = qdict_get_int(qdict, "detach");
+ int detach = qdict_get_try_bool(qdict, "detach", 0);
+ 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");
if (current_migration &&
current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) {
monitor_printf(mon, "migration already in progress\n");
- return;
+ return -1;
}
- if (strstart(uri, "tcp:", &p))
+ if (qemu_savevm_state_blocked(mon)) {
+ return -1;
+ }
+
+ if (strstart(uri, "tcp:", &p)) {
s = tcp_start_outgoing_migration(mon, p, max_throttle, detach,
- (int)qdict_get_int(qdict, "blk"),
- (int)qdict_get_int(qdict, "inc"));
+ blk, inc);
#if !defined(WIN32)
- else if (strstart(uri, "exec:", &p))
+ } else if (strstart(uri, "exec:", &p)) {
s = exec_start_outgoing_migration(mon, p, max_throttle, detach,
- (int)qdict_get_int(qdict, "blk"),
- (int)qdict_get_int(qdict, "inc"));
- else if (strstart(uri, "unix:", &p))
+ blk, inc);
+ } else if (strstart(uri, "unix:", &p)) {
s = unix_start_outgoing_migration(mon, p, max_throttle, detach,
- (int)qdict_get_int(qdict, "blk"),
- (int)qdict_get_int(qdict, "inc"));
- else if (strstart(uri, "fd:", &p))
+ blk, inc);
+ } else if (strstart(uri, "fd:", &p)) {
s = fd_start_outgoing_migration(mon, p, max_throttle, detach,
- (int)qdict_get_int(qdict, "blk"),
- (int)qdict_get_int(qdict, "inc"));
+ blk, inc);
#endif
- else
+ } else {
monitor_printf(mon, "unknown migration protocol: %s\n", uri);
+ return -1;
+ }
- if (s == NULL)
+ if (s == NULL) {
monitor_printf(mon, "migration failed\n");
- else {
- if (current_migration)
- current_migration->release(current_migration);
+ return -1;
+ }
- current_migration = s;
+ if (current_migration) {
+ current_migration->release(current_migration);
}
+
+ current_migration = &s->mig_state;
+ notifier_list_notify(&migration_state_notifiers, NULL);
+ return 0;
}
-void do_migrate_cancel(Monitor *mon, const QDict *qdict, QObject **ret_data)
+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;
}
-void do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
+int do_migrate_set_speed(Monitor *mon, const QDict *qdict, QObject **ret_data)
{
- double d;
+ int64_t d;
FdMigrationState *s;
- d = qdict_get_double(qdict, "value");
- d = MAX(0, MIN(UINT32_MAX, d));
+ d = qdict_get_int(qdict, "value");
+ if (d < 0) {
+ d = 0;
+ }
max_throttle = d;
s = migrate_to_fms(current_migration);
if (s && s->file) {
qemu_file_set_rate_limit(s->file, max_throttle);
}
+
+ return 0;
}
/* amount of nanoseconds we are willing to wait for migration to be down.
return max_downtime;
}
-void do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
- QObject **ret_data)
+int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
+ QObject **ret_data)
{
double d;
d = qdict_get_double(qdict, "value") * 1e9;
d = MAX(0, MIN(UINT64_MAX, d));
max_downtime = (uint64_t)d;
+
+ return 0;
}
static void migrate_print_status(Monitor *mon, const char *name,
qdict_put_obj(qdict, name, obj);
}
-/**
- * do_info_migrate(): Migration status
- *
- * Return a QDict. If migration is active there will be another
- * QDict with RAM migration status and if block migration is active
- * another one with block migration status.
- *
- * The main QDict contains the following:
- *
- * - "status": migration status
- * - "ram": only present if "status" is "active", it is a QDict with the
- * following RAM information (in bytes):
- * - "transferred": amount transferred
- * - "remaining": amount remaining
- * - "total": total
- * - "disk": only present if "status" is "active" and it is a block migration,
- * it is a QDict with the following disk information (in bytes):
- * - "transferred": amount transferred
- * - "remaining": amount remaining
- * - "total": total
- *
- * Examples:
- *
- * 1. Migration is "completed":
- *
- * { "status": "completed" }
- *
- * 2. Migration is "active" and it is not a block migration:
- *
- * { "status": "active",
- * "ram": { "transferred": 123, "remaining": 123, "total": 246 } }
- *
- * 3. Migration is "active" and it is a block migration:
- *
- * { "status": "active",
- * "ram": { "total": 1057024, "remaining": 1053304, "transferred": 3720 },
- * "disk": { "total": 20971520, "remaining": 20880384, "transferred": 91136 }}
- */
void do_info_migrate(Monitor *mon, QObject **ret_data)
{
QDict *qdict;
{
DPRINTF("setting error state\n");
s->state = MIG_STATE_ERROR;
+ notifier_list_notify(&migration_state_notifiers, NULL);
migrate_fd_cleanup(s);
}
-void migrate_fd_cleanup(FdMigrationState *s)
+int migrate_fd_cleanup(FdMigrationState *s)
{
+ int ret = 0;
+
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
if (s->file) {
DPRINTF("closing file\n");
- qemu_fclose(s->file);
+ if (qemu_fclose(s->file) != 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)
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)
FdMigrationState *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 == -1)
ret = -(s->get_error(s));
- if (ret == -EAGAIN)
+ if (ret == -EAGAIN) {
qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
+ }
return ret;
}
void migrate_fd_put_ready(void *opaque)
{
FdMigrationState *s = opaque;
+ int ret;
if (s->state != MIG_STATE_ACTIVE) {
DPRINTF("put_ready returning because of non-active state\n");
}
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);
- qemu_aio_flush();
- bdrv_flush_all();
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;
}
- migrate_fd_cleanup(s);
- s->state = state;
+ if (migrate_fd_cleanup(s) < 0) {
+ if (old_vm_running) {
+ vm_start();
+ }
+ s->state = MIG_STATE_ERROR;
+ }
+ if (s->state == MIG_STATE_ACTIVE) {
+ s->state = MIG_STATE_COMPLETED;
+ runstate_set(RUN_STATE_POSTMIGRATE);
+ }
+ notifier_list_notify(&migration_state_notifiers, NULL);
}
}
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);
if (s->state == MIG_STATE_ACTIVE) {
s->state = MIG_STATE_CANCELLED;
+ notifier_list_notify(&migration_state_notifiers, NULL);
migrate_fd_cleanup(s);
}
- free(s);
+ g_free(s);
}
void migrate_fd_wait_for_unfreeze(void *opaque)
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)
{
FdMigrationState *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;
+ }
+}
projects / qemu.git / blobdiff