#include "sysemu.h"
#include "block.h"
#include "qemu_socket.h"
+#include "block-migration.h"
+#include "qemu-objects.h"
//#define DEBUG_MIGRATION
#ifdef DEBUG_MIGRATION
-#define dprintf(fmt, ...) \
+#define DPRINTF(fmt, ...) \
do { printf("migration: " fmt, ## __VA_ARGS__); } while (0)
#else
-#define dprintf(fmt, ...) \
+#define DPRINTF(fmt, ...) \
do { } while (0)
#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 do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void process_incoming_migration(QEMUFile *f)
{
- MigrationState *s = NULL;
+ 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);
+ }
+}
+
+int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ 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 (strstart(uri, "tcp:", &p))
- s = tcp_start_outgoing_migration(p, max_throttle, detach);
+ if (current_migration &&
+ current_migration->get_status(current_migration) == MIG_STATE_ACTIVE) {
+ monitor_printf(mon, "migration already in progress\n");
+ return -1;
+ }
+
+ if (qemu_savevm_state_blocked(mon)) {
+ return -1;
+ }
+
+ if (strstart(uri, "tcp:", &p)) {
+ s = tcp_start_outgoing_migration(mon, p, max_throttle, detach,
+ blk, inc);
#if !defined(WIN32)
- else if (strstart(uri, "exec:", &p))
- s = exec_start_outgoing_migration(p, max_throttle, detach);
- else if (strstart(uri, "unix:", &p))
- s = unix_start_outgoing_migration(p, max_throttle, detach);
- else if (strstart(uri, "fd:", &p))
- s = fd_start_outgoing_migration(mon, p, max_throttle, detach);
+ } else if (strstart(uri, "exec:", &p)) {
+ s = exec_start_outgoing_migration(mon, p, max_throttle, detach,
+ blk, inc);
+ } else if (strstart(uri, "unix:", &p)) {
+ s = unix_start_outgoing_migration(mon, p, max_throttle, detach,
+ blk, inc);
+ } else if (strstart(uri, "fd:", &p)) {
+ s = fd_start_outgoing_migration(mon, p, max_throttle, detach,
+ 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)
+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;
- char *ptr;
+ int64_t d;
FdMigrationState *s;
- const char *value = qdict_get_str(qdict, "value");
-
- d = strtod(value, &ptr);
- switch (*ptr) {
- case 'G': case 'g':
- d *= 1024;
- case 'M': case 'm':
- d *= 1024;
- case 'K': case 'k':
- d *= 1024;
- default:
- break;
+
+ d = qdict_get_int(qdict, "value");
+ if (d < 0) {
+ d = 0;
}
+ max_throttle = d;
- max_throttle = (uint32_t)d;
s = migrate_to_fms(current_migration);
-
- if (s) {
+ 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)
+int do_migrate_set_downtime(Monitor *mon, const QDict *qdict,
+ QObject **ret_data)
{
- char *ptr;
double d;
- const char *value = qdict_get_str(qdict, "value");
-
- d = strtod(value, &ptr);
- if (!strcmp(ptr,"ms")) {
- d *= 1000000;
- } else if (!strcmp(ptr,"us")) {
- d *= 1000;
- } else if (!strcmp(ptr,"ns")) {
- } else {
- /* all else considered to be seconds */
- d *= 1000000000;
- }
+ 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,
+ const QDict *status_dict)
+{
+ QDict *qdict;
+
+ qdict = qobject_to_qdict(qdict_get(status_dict, name));
+
+ monitor_printf(mon, "transferred %s: %" PRIu64 " kbytes\n", name,
+ qdict_get_int(qdict, "transferred") >> 10);
+ monitor_printf(mon, "remaining %s: %" PRIu64 " kbytes\n", name,
+ qdict_get_int(qdict, "remaining") >> 10);
+ monitor_printf(mon, "total %s: %" PRIu64 " kbytes\n", name,
+ qdict_get_int(qdict, "total") >> 10);
+}
+
+void do_info_migrate_print(Monitor *mon, const QObject *data)
+{
+ QDict *qdict;
+
+ qdict = qobject_to_qdict(data);
+
+ monitor_printf(mon, "Migration status: %s\n",
+ qdict_get_str(qdict, "status"));
+
+ if (qdict_haskey(qdict, "ram")) {
+ migrate_print_status(mon, "ram", qdict);
+ }
+
+ if (qdict_haskey(qdict, "disk")) {
+ migrate_print_status(mon, "disk", qdict);
+ }
}
-void do_info_migrate(Monitor *mon)
+static void migrate_put_status(QDict *qdict, const char *name,
+ uint64_t trans, uint64_t rem, uint64_t total)
{
+ QObject *obj;
+
+ obj = qobject_from_jsonf("{ 'transferred': %" PRId64 ", "
+ "'remaining': %" PRId64 ", "
+ "'total': %" PRId64 " }", trans, rem, total);
+ qdict_put_obj(qdict, name, obj);
+}
+
+void do_info_migrate(Monitor *mon, QObject **ret_data)
+{
+ QDict *qdict;
MigrationState *s = current_migration;
if (s) {
- monitor_printf(mon, "Migration status: ");
switch (s->get_status(s)) {
case MIG_STATE_ACTIVE:
- monitor_printf(mon, "active\n");
- monitor_printf(mon, "transferred ram: %" PRIu64 " kbytes\n", ram_bytes_transferred() >> 10);
- monitor_printf(mon, "remaining ram: %" PRIu64 " kbytes\n", ram_bytes_remaining() >> 10);
- monitor_printf(mon, "total ram: %" PRIu64 " kbytes\n", ram_bytes_total() >> 10);
+ qdict = qdict_new();
+ qdict_put(qdict, "status", qstring_from_str("active"));
+
+ migrate_put_status(qdict, "ram", ram_bytes_transferred(),
+ ram_bytes_remaining(), ram_bytes_total());
+
+ if (blk_mig_active()) {
+ migrate_put_status(qdict, "disk", blk_mig_bytes_transferred(),
+ blk_mig_bytes_remaining(),
+ blk_mig_bytes_total());
+ }
+
+ *ret_data = QOBJECT(qdict);
break;
case MIG_STATE_COMPLETED:
- monitor_printf(mon, "completed\n");
+ *ret_data = qobject_from_jsonf("{ 'status': 'completed' }");
break;
case MIG_STATE_ERROR:
- monitor_printf(mon, "failed\n");
+ *ret_data = qobject_from_jsonf("{ 'status': 'failed' }");
break;
case MIG_STATE_CANCELLED:
- monitor_printf(mon, "cancelled\n");
+ *ret_data = qobject_from_jsonf("{ 'status': 'cancelled' }");
break;
}
}
/* shared migration helpers */
-void migrate_fd_monitor_suspend(FdMigrationState *s)
+void migrate_fd_monitor_suspend(FdMigrationState *s, Monitor *mon)
{
- s->mon_resume = cur_mon;
- if (monitor_suspend(cur_mon) == 0)
- dprintf("suspending monitor\n");
- else
- monitor_printf(cur_mon, "terminal does not allow synchronous "
+ s->mon = mon;
+ if (monitor_suspend(mon) == 0) {
+ DPRINTF("suspending monitor\n");
+ } else {
+ monitor_printf(mon, "terminal does not allow synchronous "
"migration, continuing detached\n");
+ }
}
void migrate_fd_error(FdMigrationState *s)
{
- dprintf("setting error state\n");
+ 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);
+ DPRINTF("closing file\n");
+ 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);
+ s->fd = -1;
+ }
- /* Don't resume monitor until we've flushed all of the buffers */
- if (s->mon_resume)
- monitor_resume(s->mon_resume);
-
- 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;
}
migrate_fd_wait_for_unfreeze,
migrate_fd_close);
- dprintf("beginning savevm\n");
- ret = qemu_savevm_state_begin(s->file);
+ 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);
+ 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;
+ int ret;
if (s->state != MIG_STATE_ACTIVE) {
- dprintf("put_ready returning because of non-active state\n");
+ DPRINTF("put_ready returning because of non-active state\n");
return;
}
- dprintf("iterate\n");
- if (qemu_savevm_state_iterate(s->file) == 1) {
- int state;
- int old_vm_running = vm_running;
+ DPRINTF("iterate\n");
+ 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);
+ DPRINTF("done iterating\n");
+ vm_stop(RUN_STATE_FINISH_MIGRATE);
- qemu_aio_flush();
- bdrv_flush_all();
- if ((qemu_savevm_state_complete(s->file)) < 0) {
+ 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);
}
}
if (s->state != MIG_STATE_ACTIVE)
return;
- dprintf("cancelling migration\n");
+ 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);
}
{
FdMigrationState *s = migrate_to_fms(mig_state);
- dprintf("releasing state\n");
+ 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);
}
- free(s);
+ g_free(s);
}
void migrate_fd_wait_for_unfreeze(void *opaque)
FdMigrationState *s = opaque;
int ret;
- dprintf("wait for unfreeze\n");
+ DPRINTF("wait for unfreeze\n");
if (s->state != MIG_STATE_ACTIVE)
return;
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