* This work is licensed under the terms of the GNU GPL, version 2. See
* the COPYING file in the top-level directory.
*
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
*/
#include "qemu-common.h"
#define MAX_THROTTLE (32 << 20) /* Migration speed throttling */
+/* Migration XBZRLE default cache size */
+#define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024)
+
static NotifierList migration_state_notifiers =
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
migrations at once. For now we don't need to add
dynamic creation of migration */
-static MigrationState *migrate_get_current(void)
+MigrationState *migrate_get_current(void)
{
static MigrationState current_migration = {
.state = MIG_STATE_SETUP,
.bandwidth_limit = MAX_THROTTLE,
+ .xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
};
return ¤t_migration;
}
-int qemu_start_incoming_migration(const char *uri)
+void qemu_start_incoming_migration(const char *uri, Error **errp)
{
const char *p;
- int ret;
if (strstart(uri, "tcp:", &p))
- ret = tcp_start_incoming_migration(p);
+ tcp_start_incoming_migration(p, errp);
#if !defined(WIN32)
else if (strstart(uri, "exec:", &p))
- ret = exec_start_incoming_migration(p);
+ exec_start_incoming_migration(p, errp);
else if (strstart(uri, "unix:", &p))
- ret = unix_start_incoming_migration(p);
+ unix_start_incoming_migration(p, errp);
else if (strstart(uri, "fd:", &p))
- ret = fd_start_incoming_migration(p);
+ fd_start_incoming_migration(p, errp);
#endif
else {
- fprintf(stderr, "unknown migration protocol: %s\n", uri);
- ret = -EPROTONOSUPPORT;
+ error_setg(errp, "unknown migration protocol: %s\n", uri);
}
- return ret;
}
void process_incoming_migration(QEMUFile *f)
qemu_announce_self();
DPRINTF("successfully loaded vm state\n");
+ bdrv_clear_incoming_migration_all();
/* Make sure all file formats flush their mutable metadata */
bdrv_invalidate_cache_all();
if (autostart) {
vm_start();
} else {
- runstate_set(RUN_STATE_PRELAUNCH);
+ runstate_set(RUN_STATE_PAUSED);
}
}
return max_downtime;
}
+MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
+{
+ MigrationCapabilityStatusList *head = NULL;
+ MigrationCapabilityStatusList *caps;
+ MigrationState *s = migrate_get_current();
+ int i;
+
+ for (i = 0; i < MIGRATION_CAPABILITY_MAX; i++) {
+ if (head == NULL) {
+ head = g_malloc0(sizeof(*caps));
+ caps = head;
+ } else {
+ caps->next = g_malloc0(sizeof(*caps));
+ caps = caps->next;
+ }
+ caps->value =
+ g_malloc(sizeof(*caps->value));
+ caps->value->capability = i;
+ caps->value->state = s->enabled_capabilities[i];
+ }
+
+ return head;
+}
+
+static void get_xbzrle_cache_stats(MigrationInfo *info)
+{
+ if (migrate_use_xbzrle()) {
+ info->has_xbzrle_cache = true;
+ info->xbzrle_cache = g_malloc0(sizeof(*info->xbzrle_cache));
+ info->xbzrle_cache->cache_size = migrate_xbzrle_cache_size();
+ info->xbzrle_cache->bytes = xbzrle_mig_bytes_transferred();
+ info->xbzrle_cache->pages = xbzrle_mig_pages_transferred();
+ info->xbzrle_cache->cache_miss = xbzrle_mig_pages_cache_miss();
+ info->xbzrle_cache->overflow = xbzrle_mig_pages_overflow();
+ }
+}
+
MigrationInfo *qmp_query_migrate(Error **errp)
{
MigrationInfo *info = g_malloc0(sizeof(*info));
case MIG_STATE_ACTIVE:
info->has_status = true;
info->status = g_strdup("active");
+ info->has_total_time = true;
+ info->total_time = qemu_get_clock_ms(rt_clock)
+ - s->total_time;
+ info->has_expected_downtime = true;
+ info->expected_downtime = s->expected_downtime;
info->has_ram = true;
info->ram = g_malloc0(sizeof(*info->ram));
info->ram->transferred = ram_bytes_transferred();
info->ram->remaining = ram_bytes_remaining();
info->ram->total = ram_bytes_total();
+ info->ram->duplicate = dup_mig_pages_transferred();
+ info->ram->normal = norm_mig_pages_transferred();
+ info->ram->normal_bytes = norm_mig_bytes_transferred();
+ info->ram->dirty_pages_rate = s->dirty_pages_rate;
+
if (blk_mig_active()) {
info->has_disk = true;
info->disk->remaining = blk_mig_bytes_remaining();
info->disk->total = blk_mig_bytes_total();
}
+
+ get_xbzrle_cache_stats(info);
break;
case MIG_STATE_COMPLETED:
+ get_xbzrle_cache_stats(info);
+
info->has_status = true;
info->status = g_strdup("completed");
+ info->total_time = s->total_time;
+ info->has_downtime = true;
+ info->downtime = s->downtime;
+
+ info->has_ram = true;
+ info->ram = g_malloc0(sizeof(*info->ram));
+ info->ram->transferred = ram_bytes_transferred();
+ info->ram->remaining = 0;
+ info->ram->total = ram_bytes_total();
+ info->ram->duplicate = dup_mig_pages_transferred();
+ info->ram->normal = norm_mig_pages_transferred();
+ info->ram->normal_bytes = norm_mig_bytes_transferred();
break;
case MIG_STATE_ERROR:
info->has_status = true;
return info;
}
-/* shared migration helpers */
-
-static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
+void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
+ Error **errp)
{
- if (monitor_suspend(mon) == 0) {
- DPRINTF("suspending monitor\n");
- } else {
- monitor_printf(mon, "terminal does not allow synchronous "
- "migration, continuing detached\n");
+ MigrationState *s = migrate_get_current();
+ MigrationCapabilityStatusList *cap;
+
+ if (s->state == MIG_STATE_ACTIVE) {
+ error_set(errp, QERR_MIGRATION_ACTIVE);
+ return;
+ }
+
+ for (cap = params; cap; cap = cap->next) {
+ s->enabled_capabilities[cap->value->capability] = cap->value->state;
}
}
+/* shared migration helpers */
+
static int migrate_fd_cleanup(MigrationState *s)
{
int ret = 0;
- qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
+ if (s->fd != -1) {
+ qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
+ }
if (s->file) {
DPRINTF("closing file\n");
ret = qemu_fclose(s->file);
s->file = NULL;
- } else {
- if (s->mon) {
- monitor_resume(s->mon);
- }
}
if (s->fd != -1) {
static void migrate_fd_put_notify(void *opaque)
{
MigrationState *s = opaque;
+ int ret;
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
- qemu_file_put_notify(s->file);
- if (s->file && qemu_file_get_error(s->file)) {
+ ret = qemu_file_put_notify(s->file);
+ if (ret) {
migrate_fd_error(s);
}
}
-static ssize_t migrate_fd_put_buffer(void *opaque, const void *data,
- size_t size)
+ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data,
+ size_t size)
{
- MigrationState *s = opaque;
ssize_t ret;
if (s->state != MIG_STATE_ACTIVE) {
return ret;
}
-static void migrate_fd_put_ready(void *opaque)
+void migrate_fd_put_ready(MigrationState *s)
{
- MigrationState *s = opaque;
int ret;
if (s->state != MIG_STATE_ACTIVE) {
}
DPRINTF("iterate\n");
- ret = qemu_savevm_state_iterate(s->mon, s->file);
+ ret = qemu_savevm_state_iterate(s->file);
if (ret < 0) {
migrate_fd_error(s);
} else if (ret == 1) {
int old_vm_running = runstate_is_running();
+ int64_t start_time, end_time;
DPRINTF("done iterating\n");
+ start_time = qemu_get_clock_ms(rt_clock);
+ qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
- if (qemu_savevm_state_complete(s->mon, s->file) < 0) {
+ if (qemu_savevm_state_complete(s->file) < 0) {
migrate_fd_error(s);
} else {
migrate_fd_completed(s);
}
+ end_time = qemu_get_clock_ms(rt_clock);
+ s->total_time = end_time - s->total_time;
+ s->downtime = end_time - start_time;
if (s->state != MIG_STATE_COMPLETED) {
if (old_vm_running) {
vm_start();
s->state = MIG_STATE_CANCELLED;
notifier_list_notify(&migration_state_notifiers, s);
- qemu_savevm_state_cancel(s->mon, s->file);
+ qemu_savevm_state_cancel(s->file);
migrate_fd_cleanup(s);
}
-static void migrate_fd_wait_for_unfreeze(void *opaque)
+int migrate_fd_wait_for_unfreeze(MigrationState *s)
{
- MigrationState *s = opaque;
int ret;
DPRINTF("wait for unfreeze\n");
if (s->state != MIG_STATE_ACTIVE)
- return;
+ return -EINVAL;
do {
fd_set wfds;
} while (ret == -1 && (s->get_error(s)) == EINTR);
if (ret == -1) {
- qemu_file_set_error(s->file, -s->get_error(s));
+ return -s->get_error(s);
}
+ return 0;
}
-static int migrate_fd_close(void *opaque)
+int migrate_fd_close(MigrationState *s)
{
- 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 remove_migration_state_change_notifier(Notifier *notify)
{
- notifier_list_remove(&migration_state_notifiers, notify);
+ notifier_remove(notify);
}
bool migration_is_active(MigrationState *s)
int ret;
s->state = MIG_STATE_ACTIVE;
- 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);
+ s->file = qemu_fopen_ops_buffered(s);
DPRINTF("beginning savevm\n");
- ret = qemu_savevm_state_begin(s->mon, s->file, s->blk, s->shared);
+ ret = qemu_savevm_state_begin(s->file, &s->params);
if (ret < 0) {
DPRINTF("failed, %d\n", ret);
migrate_fd_error(s);
migrate_fd_put_ready(s);
}
-static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
+static MigrationState *migrate_init(const MigrationParams *params)
{
MigrationState *s = migrate_get_current();
int64_t bandwidth_limit = s->bandwidth_limit;
+ bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
+ int64_t xbzrle_cache_size = s->xbzrle_cache_size;
+
+ memcpy(enabled_capabilities, s->enabled_capabilities,
+ sizeof(enabled_capabilities));
memset(s, 0, sizeof(*s));
s->bandwidth_limit = bandwidth_limit;
- s->blk = blk;
- s->shared = inc;
-
- /* s->mon is used for two things:
- - pass fd in fd migration
- - suspend/resume monitor for not detached migration
- */
- s->mon = mon;
+ s->params = *params;
+ memcpy(s->enabled_capabilities, enabled_capabilities,
+ sizeof(enabled_capabilities));
+ s->xbzrle_cache_size = xbzrle_cache_size;
+
s->bandwidth_limit = bandwidth_limit;
s->state = MIG_STATE_SETUP;
-
- if (!detach) {
- migrate_fd_monitor_suspend(s, mon);
- }
+ s->total_time = qemu_get_clock_ms(rt_clock);
return s;
}
migration_blockers = g_slist_remove(migration_blockers, reason);
}
-int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data)
+void qmp_migrate(const char *uri, bool has_blk, bool blk,
+ bool has_inc, bool inc, bool has_detach, bool detach,
+ Error **errp)
{
+ Error *local_err = NULL;
MigrationState *s = migrate_get_current();
+ MigrationParams params;
const char *p;
- 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");
- int ret;
+
+ params.blk = blk;
+ params.shared = inc;
if (s->state == MIG_STATE_ACTIVE) {
- monitor_printf(mon, "migration already in progress\n");
- return -1;
+ error_set(errp, QERR_MIGRATION_ACTIVE);
+ return;
}
- if (qemu_savevm_state_blocked(mon)) {
- return -1;
+ if (qemu_savevm_state_blocked(errp)) {
+ return;
}
if (migration_blockers) {
- Error *err = migration_blockers->data;
- qerror_report_err(err);
- return -1;
+ *errp = error_copy(migration_blockers->data);
+ return;
}
- s = migrate_init(mon, detach, blk, inc);
+ s = migrate_init(¶ms);
if (strstart(uri, "tcp:", &p)) {
- ret = tcp_start_outgoing_migration(s, p);
+ tcp_start_outgoing_migration(s, p, &local_err);
#if !defined(WIN32)
} else if (strstart(uri, "exec:", &p)) {
- ret = exec_start_outgoing_migration(s, p);
+ exec_start_outgoing_migration(s, p, &local_err);
} else if (strstart(uri, "unix:", &p)) {
- ret = unix_start_outgoing_migration(s, p);
+ unix_start_outgoing_migration(s, p, &local_err);
} else if (strstart(uri, "fd:", &p)) {
- ret = fd_start_outgoing_migration(s, p);
+ fd_start_outgoing_migration(s, p, &local_err);
#endif
} else {
- monitor_printf(mon, "unknown migration protocol: %s\n", uri);
- ret = -EINVAL;
- }
-
- if (ret < 0) {
- monitor_printf(mon, "migration failed: %s\n", strerror(-ret));
- return ret;
+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
+ return;
}
- if (detach) {
- s->mon = NULL;
+ if (local_err) {
+ migrate_fd_error(s);
+ error_propagate(errp, local_err);
+ return;
}
notifier_list_notify(&migration_state_notifiers, s);
- return 0;
}
void qmp_migrate_cancel(Error **errp)
migrate_fd_cancel(migrate_get_current());
}
+void qmp_migrate_set_cache_size(int64_t value, Error **errp)
+{
+ MigrationState *s = migrate_get_current();
+
+ /* Check for truncation */
+ if (value != (size_t)value) {
+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "cache size",
+ "exceeding address space");
+ return;
+ }
+
+ s->xbzrle_cache_size = xbzrle_cache_resize(value);
+}
+
+int64_t qmp_query_migrate_cache_size(Error **errp)
+{
+ return migrate_xbzrle_cache_size();
+}
+
void qmp_migrate_set_speed(int64_t value, Error **errp)
{
MigrationState *s;
value = MAX(0, MIN(UINT64_MAX, value));
max_downtime = (uint64_t)value;
}
+
+int migrate_use_xbzrle(void)
+{
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_XBZRLE];
+}
+
+int64_t migrate_xbzrle_cache_size(void)
+{
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->xbzrle_cache_size;
+}
projects / qemu.git / blobdiff