2008-10-13 05:12:02 +02:00
|
|
|
/*
|
|
|
|
* QEMU live migration
|
|
|
|
*
|
|
|
|
* Copyright IBM, Corp. 2008
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Anthony Liguori <aliguori@us.ibm.com>
|
|
|
|
*
|
|
|
|
* This work is licensed under the terms of the GNU GPL, version 2. See
|
|
|
|
* the COPYING file in the top-level directory.
|
|
|
|
*
|
2012-01-13 17:44:23 +01:00
|
|
|
* Contributions after 2012-01-13 are licensed under the terms of the
|
|
|
|
* GNU GPL, version 2 or (at your option) any later version.
|
2008-10-13 05:12:02 +02:00
|
|
|
*/
|
|
|
|
|
|
|
|
#include "qemu-common.h"
|
|
|
|
#include "migration.h"
|
2009-03-06 00:01:23 +01:00
|
|
|
#include "monitor.h"
|
2008-11-11 17:46:33 +01:00
|
|
|
#include "buffered_file.h"
|
|
|
|
#include "sysemu.h"
|
|
|
|
#include "block.h"
|
|
|
|
#include "qemu_socket.h"
|
2009-11-30 18:21:21 +01:00
|
|
|
#include "block-migration.h"
|
2011-09-13 22:37:16 +02:00
|
|
|
#include "qmp-commands.h"
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
//#define DEBUG_MIGRATION
|
|
|
|
|
|
|
|
#ifdef DEBUG_MIGRATION
|
2010-02-07 00:03:50 +01:00
|
|
|
#define DPRINTF(fmt, ...) \
|
2008-11-11 17:46:33 +01:00
|
|
|
do { printf("migration: " fmt, ## __VA_ARGS__); } while (0)
|
|
|
|
#else
|
2010-02-07 00:03:50 +01:00
|
|
|
#define DPRINTF(fmt, ...) \
|
2008-11-11 17:46:33 +01:00
|
|
|
do { } while (0)
|
|
|
|
#endif
|
2008-10-13 05:12:02 +02:00
|
|
|
|
2011-02-23 00:48:46 +01:00
|
|
|
enum {
|
|
|
|
MIG_STATE_ERROR,
|
|
|
|
MIG_STATE_SETUP,
|
|
|
|
MIG_STATE_CANCELLED,
|
|
|
|
MIG_STATE_ACTIVE,
|
|
|
|
MIG_STATE_COMPLETED,
|
|
|
|
};
|
2008-10-13 05:12:02 +02:00
|
|
|
|
2011-02-23 00:33:19 +01:00
|
|
|
#define MAX_THROTTLE (32 << 20) /* Migration speed throttling */
|
2008-10-13 05:12:02 +02:00
|
|
|
|
2012-08-06 20:42:53 +02:00
|
|
|
/* Migration XBZRLE default cache size */
|
|
|
|
#define DEFAULT_MIGRATE_CACHE_SIZE (64 * 1024 * 1024)
|
|
|
|
|
2010-12-13 17:30:12 +01:00
|
|
|
static NotifierList migration_state_notifiers =
|
|
|
|
NOTIFIER_LIST_INITIALIZER(migration_state_notifiers);
|
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
/* When we add fault tolerance, we could have several
|
|
|
|
migrations at once. For now we don't need to add
|
|
|
|
dynamic creation of migration */
|
|
|
|
|
2012-08-13 09:42:49 +02:00
|
|
|
MigrationState *migrate_get_current(void)
|
2011-10-05 13:50:43 +02:00
|
|
|
{
|
|
|
|
static MigrationState current_migration = {
|
|
|
|
.state = MIG_STATE_SETUP,
|
2011-02-23 00:33:19 +01:00
|
|
|
.bandwidth_limit = MAX_THROTTLE,
|
2012-08-06 20:42:53 +02:00
|
|
|
.xbzrle_cache_size = DEFAULT_MIGRATE_CACHE_SIZE,
|
2011-10-05 13:50:43 +02:00
|
|
|
};
|
|
|
|
|
|
|
|
return ¤t_migration;
|
|
|
|
}
|
|
|
|
|
2012-05-10 18:28:35 +02:00
|
|
|
int qemu_start_incoming_migration(const char *uri, Error **errp)
|
2008-10-13 05:12:02 +02:00
|
|
|
{
|
2008-10-13 05:14:31 +02:00
|
|
|
const char *p;
|
2010-06-09 14:10:54 +02:00
|
|
|
int ret;
|
2008-10-13 05:14:31 +02:00
|
|
|
|
|
|
|
if (strstart(uri, "tcp:", &p))
|
2012-05-10 18:28:35 +02:00
|
|
|
ret = tcp_start_incoming_migration(p, errp);
|
2008-11-11 17:46:33 +01:00
|
|
|
#if !defined(WIN32)
|
|
|
|
else if (strstart(uri, "exec:", &p))
|
2010-06-09 14:10:54 +02:00
|
|
|
ret = exec_start_incoming_migration(p);
|
2009-08-05 17:24:29 +02:00
|
|
|
else if (strstart(uri, "unix:", &p))
|
2010-06-09 14:10:54 +02:00
|
|
|
ret = unix_start_incoming_migration(p);
|
2009-08-18 15:56:25 +02:00
|
|
|
else if (strstart(uri, "fd:", &p))
|
2010-06-09 14:10:54 +02:00
|
|
|
ret = fd_start_incoming_migration(p);
|
2008-11-11 17:46:33 +01:00
|
|
|
#endif
|
2010-06-09 14:10:54 +02:00
|
|
|
else {
|
2008-10-13 05:14:31 +02:00
|
|
|
fprintf(stderr, "unknown migration protocol: %s\n", uri);
|
2010-06-09 14:10:54 +02:00
|
|
|
ret = -EPROTONOSUPPORT;
|
|
|
|
}
|
|
|
|
return ret;
|
2008-10-13 05:12:02 +02:00
|
|
|
}
|
|
|
|
|
2010-06-09 14:10:55 +02:00
|
|
|
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");
|
|
|
|
|
2012-03-23 08:36:52 +01:00
|
|
|
bdrv_clear_incoming_migration_all();
|
2011-11-14 22:09:45 +01:00
|
|
|
/* Make sure all file formats flush their mutable metadata */
|
|
|
|
bdrv_invalidate_cache_all();
|
|
|
|
|
2011-07-29 20:04:45 +02:00
|
|
|
if (autostart) {
|
2010-06-09 14:10:55 +02:00
|
|
|
vm_start();
|
2011-07-29 20:04:45 +02:00
|
|
|
} else {
|
2011-09-30 19:45:27 +02:00
|
|
|
runstate_set(RUN_STATE_PRELAUNCH);
|
2011-07-29 20:04:45 +02:00
|
|
|
}
|
2010-06-09 14:10:55 +02:00
|
|
|
}
|
|
|
|
|
2009-05-28 21:22:57 +02:00
|
|
|
/* amount of nanoseconds we are willing to wait for migration to be down.
|
|
|
|
* the choice of nanoseconds is because it is the maximum resolution that
|
|
|
|
* get_clock() can achieve. It is an internal measure. All user-visible
|
|
|
|
* units must be in seconds */
|
|
|
|
static uint64_t max_downtime = 30000000;
|
|
|
|
|
|
|
|
uint64_t migrate_max_downtime(void)
|
|
|
|
{
|
|
|
|
return max_downtime;
|
|
|
|
}
|
|
|
|
|
2012-08-06 20:42:47 +02:00
|
|
|
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;
|
|
|
|
}
|
|
|
|
|
2012-08-06 20:42:57 +02:00
|
|
|
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();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2011-09-13 22:37:16 +02:00
|
|
|
MigrationInfo *qmp_query_migrate(Error **errp)
|
2008-10-13 05:12:02 +02:00
|
|
|
{
|
2011-09-13 22:37:16 +02:00
|
|
|
MigrationInfo *info = g_malloc0(sizeof(*info));
|
2011-10-05 13:50:43 +02:00
|
|
|
MigrationState *s = migrate_get_current();
|
|
|
|
|
|
|
|
switch (s->state) {
|
|
|
|
case MIG_STATE_SETUP:
|
|
|
|
/* no migration has happened ever */
|
|
|
|
break;
|
|
|
|
case MIG_STATE_ACTIVE:
|
2011-09-13 22:37:16 +02:00
|
|
|
info->has_status = true;
|
|
|
|
info->status = g_strdup("active");
|
2012-08-18 13:17:10 +02:00
|
|
|
info->has_total_time = true;
|
|
|
|
info->total_time = qemu_get_clock_ms(rt_clock)
|
|
|
|
- s->total_time;
|
2012-08-13 09:53:12 +02:00
|
|
|
info->has_expected_downtime = true;
|
|
|
|
info->expected_downtime = s->expected_downtime;
|
2011-10-05 13:50:43 +02:00
|
|
|
|
2011-09-13 22:37:16 +02:00
|
|
|
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();
|
2012-08-06 20:42:56 +02:00
|
|
|
info->ram->duplicate = dup_mig_pages_transferred();
|
|
|
|
info->ram->normal = norm_mig_pages_transferred();
|
|
|
|
info->ram->normal_bytes = norm_mig_bytes_transferred();
|
2012-08-13 12:31:25 +02:00
|
|
|
info->ram->dirty_pages_rate = s->dirty_pages_rate;
|
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
|
|
|
|
if (blk_mig_active()) {
|
2011-09-13 22:37:16 +02:00
|
|
|
info->has_disk = true;
|
|
|
|
info->disk = g_malloc0(sizeof(*info->disk));
|
|
|
|
info->disk->transferred = blk_mig_bytes_transferred();
|
|
|
|
info->disk->remaining = blk_mig_bytes_remaining();
|
|
|
|
info->disk->total = blk_mig_bytes_total();
|
2008-10-25 00:10:31 +02:00
|
|
|
}
|
2012-08-06 20:42:57 +02:00
|
|
|
|
|
|
|
get_xbzrle_cache_stats(info);
|
2011-10-05 13:50:43 +02:00
|
|
|
break;
|
|
|
|
case MIG_STATE_COMPLETED:
|
2012-08-06 20:42:57 +02:00
|
|
|
get_xbzrle_cache_stats(info);
|
|
|
|
|
2011-09-13 22:37:16 +02:00
|
|
|
info->has_status = true;
|
|
|
|
info->status = g_strdup("completed");
|
2012-08-18 13:17:10 +02:00
|
|
|
info->total_time = s->total_time;
|
2012-08-13 09:35:16 +02:00
|
|
|
info->has_downtime = true;
|
|
|
|
info->downtime = s->downtime;
|
2012-05-21 22:01:07 +02:00
|
|
|
|
|
|
|
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();
|
2012-08-06 20:42:56 +02:00
|
|
|
info->ram->duplicate = dup_mig_pages_transferred();
|
|
|
|
info->ram->normal = norm_mig_pages_transferred();
|
|
|
|
info->ram->normal_bytes = norm_mig_bytes_transferred();
|
2011-10-05 13:50:43 +02:00
|
|
|
break;
|
|
|
|
case MIG_STATE_ERROR:
|
2011-09-13 22:37:16 +02:00
|
|
|
info->has_status = true;
|
|
|
|
info->status = g_strdup("failed");
|
2011-10-05 13:50:43 +02:00
|
|
|
break;
|
|
|
|
case MIG_STATE_CANCELLED:
|
2011-09-13 22:37:16 +02:00
|
|
|
info->has_status = true;
|
|
|
|
info->status = g_strdup("cancelled");
|
2011-10-05 13:50:43 +02:00
|
|
|
break;
|
2008-10-13 05:12:02 +02:00
|
|
|
}
|
2011-09-13 22:37:16 +02:00
|
|
|
|
|
|
|
return info;
|
2008-10-13 05:12:02 +02:00
|
|
|
}
|
|
|
|
|
2012-08-06 20:42:48 +02:00
|
|
|
void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
|
|
|
|
Error **errp)
|
|
|
|
{
|
|
|
|
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;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2008-11-11 17:46:33 +01:00
|
|
|
/* shared migration helpers */
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
static int migrate_fd_cleanup(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2010-06-02 21:55:25 +02:00
|
|
|
int ret = 0;
|
|
|
|
|
2012-09-24 13:11:10 +02:00
|
|
|
if (s->fd != -1) {
|
|
|
|
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
|
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
if (s->file) {
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("closing file\n");
|
2011-11-10 13:41:42 +01:00
|
|
|
ret = qemu_fclose(s->file);
|
2009-11-30 18:21:19 +01:00
|
|
|
s->file = NULL;
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
|
2011-08-05 09:11:26 +02:00
|
|
|
if (s->fd != -1) {
|
2008-11-11 17:46:33 +01:00
|
|
|
close(s->fd);
|
2011-08-05 09:11:26 +02:00
|
|
|
s->fd = -1;
|
2009-11-30 18:21:21 +01:00
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
|
2010-06-02 21:55:25 +02:00
|
|
|
return ret;
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
void migrate_fd_error(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2011-09-11 20:28:22 +02:00
|
|
|
DPRINTF("setting error state\n");
|
|
|
|
s->state = MIG_STATE_ERROR;
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2011-09-11 20:28:22 +02:00
|
|
|
migrate_fd_cleanup(s);
|
|
|
|
}
|
|
|
|
|
2011-02-22 23:32:54 +01:00
|
|
|
static void migrate_fd_completed(MigrationState *s)
|
|
|
|
{
|
|
|
|
DPRINTF("setting completed state\n");
|
|
|
|
if (migrate_fd_cleanup(s) < 0) {
|
|
|
|
s->state = MIG_STATE_ERROR;
|
|
|
|
} else {
|
|
|
|
s->state = MIG_STATE_COMPLETED;
|
|
|
|
runstate_set(RUN_STATE_POSTMIGRATE);
|
|
|
|
}
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2011-02-22 23:32:54 +01:00
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
static void migrate_fd_put_notify(void *opaque)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2010-05-11 15:56:35 +02:00
|
|
|
MigrationState *s = opaque;
|
2012-09-04 12:45:42 +02:00
|
|
|
int ret;
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
|
2012-09-04 12:45:42 +02:00
|
|
|
ret = qemu_file_put_notify(s->file);
|
|
|
|
if (ret) {
|
2011-02-22 16:01:24 +01:00
|
|
|
migrate_fd_error(s);
|
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
|
2012-07-20 13:10:54 +02:00
|
|
|
ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data,
|
|
|
|
size_t size)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
|
|
|
ssize_t ret;
|
|
|
|
|
2011-09-21 22:37:29 +02:00
|
|
|
if (s->state != MIG_STATE_ACTIVE) {
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
|
2008-11-11 17:46:33 +01:00
|
|
|
do {
|
|
|
|
ret = s->write(s, data, size);
|
2009-05-19 13:08:53 +02:00
|
|
|
} while (ret == -1 && ((s->get_error(s)) == EINTR));
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
if (ret == -1)
|
|
|
|
ret = -(s->get_error(s));
|
|
|
|
|
2010-08-19 15:18:39 +02:00
|
|
|
if (ret == -EAGAIN) {
|
2008-11-11 17:46:33 +01:00
|
|
|
qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s);
|
2010-08-19 15:18:39 +02:00
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2012-07-20 13:13:59 +02:00
|
|
|
void migrate_fd_put_ready(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
|
|
|
if (s->state != MIG_STATE_ACTIVE) {
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("put_ready returning because of non-active state\n");
|
2008-11-11 17:46:33 +01:00
|
|
|
return;
|
|
|
|
}
|
|
|
|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("iterate\n");
|
2011-12-05 17:06:56 +01:00
|
|
|
ret = qemu_savevm_state_iterate(s->file);
|
2011-09-22 11:02:14 +02:00
|
|
|
if (ret < 0) {
|
|
|
|
migrate_fd_error(s);
|
|
|
|
} else if (ret == 1) {
|
2011-07-29 20:36:43 +02:00
|
|
|
int old_vm_running = runstate_is_running();
|
2012-08-13 09:35:16 +02:00
|
|
|
int64_t start_time, end_time;
|
2009-07-09 20:25:47 +02:00
|
|
|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("done iterating\n");
|
2012-08-13 09:35:16 +02:00
|
|
|
start_time = qemu_get_clock_ms(rt_clock);
|
2012-03-07 08:00:26 +01:00
|
|
|
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
|
2011-10-14 16:18:09 +02:00
|
|
|
vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
|
2008-11-11 17:46:33 +01:00
|
|
|
|
2011-12-05 17:06:56 +01:00
|
|
|
if (qemu_savevm_state_complete(s->file) < 0) {
|
2011-02-22 23:18:20 +01:00
|
|
|
migrate_fd_error(s);
|
2009-04-05 21:30:33 +02:00
|
|
|
} else {
|
2011-02-22 23:32:54 +01:00
|
|
|
migrate_fd_completed(s);
|
2009-04-05 21:30:33 +02:00
|
|
|
}
|
2012-08-10 21:53:08 +02:00
|
|
|
end_time = qemu_get_clock_ms(rt_clock);
|
|
|
|
s->total_time = end_time - s->total_time;
|
2012-08-13 09:35:16 +02:00
|
|
|
s->downtime = end_time - start_time;
|
2010-05-11 23:28:53 +02:00
|
|
|
if (s->state != MIG_STATE_COMPLETED) {
|
2010-06-02 21:55:25 +02:00
|
|
|
if (old_vm_running) {
|
|
|
|
vm_start();
|
|
|
|
}
|
2011-07-29 20:04:45 +02:00
|
|
|
}
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2010-05-11 16:28:39 +02:00
|
|
|
static void migrate_fd_cancel(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
|
|
|
if (s->state != MIG_STATE_ACTIVE)
|
|
|
|
return;
|
|
|
|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("cancelling migration\n");
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
s->state = MIG_STATE_CANCELLED;
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2011-12-05 17:06:56 +01:00
|
|
|
qemu_savevm_state_cancel(s->file);
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
migrate_fd_cleanup(s);
|
|
|
|
}
|
|
|
|
|
2012-08-24 12:51:48 +02:00
|
|
|
int migrate_fd_wait_for_unfreeze(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
|
|
|
int ret;
|
|
|
|
|
2010-02-07 00:03:50 +01:00
|
|
|
DPRINTF("wait for unfreeze\n");
|
2008-11-11 17:46:33 +01:00
|
|
|
if (s->state != MIG_STATE_ACTIVE)
|
2012-08-24 12:51:48 +02:00
|
|
|
return -EINVAL;
|
2008-11-11 17:46:33 +01:00
|
|
|
|
|
|
|
do {
|
|
|
|
fd_set wfds;
|
|
|
|
|
|
|
|
FD_ZERO(&wfds);
|
|
|
|
FD_SET(s->fd, &wfds);
|
|
|
|
|
|
|
|
ret = select(s->fd + 1, NULL, &wfds, NULL, NULL);
|
|
|
|
} while (ret == -1 && (s->get_error(s)) == EINTR);
|
2011-09-21 22:46:36 +02:00
|
|
|
|
|
|
|
if (ret == -1) {
|
2012-08-24 12:51:48 +02:00
|
|
|
return -s->get_error(s);
|
2011-09-21 22:46:36 +02:00
|
|
|
}
|
2012-08-24 12:51:48 +02:00
|
|
|
return 0;
|
2008-11-11 17:46:33 +01:00
|
|
|
}
|
|
|
|
|
2012-07-20 13:19:36 +02:00
|
|
|
int migrate_fd_close(MigrationState *s)
|
2008-11-11 17:46:33 +01:00
|
|
|
{
|
2009-06-08 13:28:01 +02:00
|
|
|
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
|
2008-11-11 17:46:33 +01:00
|
|
|
return s->close(s);
|
|
|
|
}
|
2010-12-13 17:30:12 +01:00
|
|
|
|
|
|
|
void add_migration_state_change_notifier(Notifier *notify)
|
|
|
|
{
|
|
|
|
notifier_list_add(&migration_state_notifiers, notify);
|
|
|
|
}
|
|
|
|
|
|
|
|
void remove_migration_state_change_notifier(Notifier *notify)
|
|
|
|
{
|
2012-01-13 17:34:01 +01:00
|
|
|
notifier_remove(notify);
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
|
|
|
|
2011-10-25 13:50:11 +02:00
|
|
|
bool migration_is_active(MigrationState *s)
|
|
|
|
{
|
|
|
|
return s->state == MIG_STATE_ACTIVE;
|
|
|
|
}
|
|
|
|
|
2011-02-23 00:43:59 +01:00
|
|
|
bool migration_has_finished(MigrationState *s)
|
2010-12-13 17:30:12 +01:00
|
|
|
{
|
2011-02-23 00:43:59 +01:00
|
|
|
return s->state == MIG_STATE_COMPLETED;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
2010-05-11 16:28:39 +02:00
|
|
|
|
2011-10-25 13:50:11 +02:00
|
|
|
bool migration_has_failed(MigrationState *s)
|
|
|
|
{
|
|
|
|
return (s->state == MIG_STATE_CANCELLED ||
|
|
|
|
s->state == MIG_STATE_ERROR);
|
|
|
|
}
|
|
|
|
|
2011-09-11 20:28:22 +02:00
|
|
|
void migrate_fd_connect(MigrationState *s)
|
2010-12-13 17:30:12 +01:00
|
|
|
{
|
2011-09-11 20:28:22 +02:00
|
|
|
int ret;
|
|
|
|
|
2010-05-11 23:01:53 +02:00
|
|
|
s->state = MIG_STATE_ACTIVE;
|
2012-07-20 13:33:53 +02:00
|
|
|
s->file = qemu_fopen_ops_buffered(s);
|
2011-09-11 20:28:22 +02:00
|
|
|
|
|
|
|
DPRINTF("beginning savevm\n");
|
2012-06-19 17:43:09 +02:00
|
|
|
ret = qemu_savevm_state_begin(s->file, &s->params);
|
2011-09-11 20:28:22 +02:00
|
|
|
if (ret < 0) {
|
|
|
|
DPRINTF("failed, %d\n", ret);
|
|
|
|
migrate_fd_error(s);
|
|
|
|
return;
|
|
|
|
}
|
|
|
|
migrate_fd_put_ready(s);
|
|
|
|
}
|
|
|
|
|
2012-06-19 17:43:09 +02:00
|
|
|
static MigrationState *migrate_init(const MigrationParams *params)
|
2010-05-11 16:28:39 +02:00
|
|
|
{
|
2011-10-05 13:50:43 +02:00
|
|
|
MigrationState *s = migrate_get_current();
|
2011-02-23 00:33:19 +01:00
|
|
|
int64_t bandwidth_limit = s->bandwidth_limit;
|
2012-08-06 20:42:47 +02:00
|
|
|
bool enabled_capabilities[MIGRATION_CAPABILITY_MAX];
|
2012-08-06 20:42:53 +02:00
|
|
|
int64_t xbzrle_cache_size = s->xbzrle_cache_size;
|
2012-08-06 20:42:47 +02:00
|
|
|
|
|
|
|
memcpy(enabled_capabilities, s->enabled_capabilities,
|
|
|
|
sizeof(enabled_capabilities));
|
2010-05-11 16:28:39 +02:00
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
memset(s, 0, sizeof(*s));
|
2011-02-23 00:33:19 +01:00
|
|
|
s->bandwidth_limit = bandwidth_limit;
|
2012-06-19 17:43:09 +02:00
|
|
|
s->params = *params;
|
2012-08-06 20:42:47 +02:00
|
|
|
memcpy(s->enabled_capabilities, enabled_capabilities,
|
|
|
|
sizeof(enabled_capabilities));
|
2012-08-06 20:42:53 +02:00
|
|
|
s->xbzrle_cache_size = xbzrle_cache_size;
|
2011-11-09 21:29:01 +01:00
|
|
|
|
2010-05-11 16:28:39 +02:00
|
|
|
s->bandwidth_limit = bandwidth_limit;
|
2010-05-11 23:01:53 +02:00
|
|
|
s->state = MIG_STATE_SETUP;
|
2012-05-21 22:01:07 +02:00
|
|
|
s->total_time = qemu_get_clock_ms(rt_clock);
|
2010-05-11 16:28:39 +02:00
|
|
|
|
|
|
|
return s;
|
|
|
|
}
|
2011-02-22 23:54:21 +01:00
|
|
|
|
2011-11-14 22:09:43 +01:00
|
|
|
static GSList *migration_blockers;
|
|
|
|
|
|
|
|
void migrate_add_blocker(Error *reason)
|
|
|
|
{
|
|
|
|
migration_blockers = g_slist_prepend(migration_blockers, reason);
|
|
|
|
}
|
|
|
|
|
|
|
|
void migrate_del_blocker(Error *reason)
|
|
|
|
{
|
|
|
|
migration_blockers = g_slist_remove(migration_blockers, reason);
|
|
|
|
}
|
|
|
|
|
2011-12-05 17:48:01 +01:00
|
|
|
void qmp_migrate(const char *uri, bool has_blk, bool blk,
|
|
|
|
bool has_inc, bool inc, bool has_detach, bool detach,
|
|
|
|
Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
2012-10-03 14:34:33 +02:00
|
|
|
Error *local_err = NULL;
|
2011-10-05 13:50:43 +02:00
|
|
|
MigrationState *s = migrate_get_current();
|
2012-06-19 17:43:09 +02:00
|
|
|
MigrationParams params;
|
2011-02-22 23:54:21 +01:00
|
|
|
const char *p;
|
|
|
|
int ret;
|
|
|
|
|
2012-06-19 17:43:09 +02:00
|
|
|
params.blk = blk;
|
|
|
|
params.shared = inc;
|
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
if (s->state == MIG_STATE_ACTIVE) {
|
2011-12-05 17:48:01 +01:00
|
|
|
error_set(errp, QERR_MIGRATION_ACTIVE);
|
|
|
|
return;
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-12-05 17:48:01 +01:00
|
|
|
if (qemu_savevm_state_blocked(errp)) {
|
|
|
|
return;
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-14 22:09:43 +01:00
|
|
|
if (migration_blockers) {
|
2011-12-05 17:48:01 +01:00
|
|
|
*errp = error_copy(migration_blockers->data);
|
|
|
|
return;
|
2011-11-14 22:09:43 +01:00
|
|
|
}
|
|
|
|
|
2012-06-19 17:43:09 +02:00
|
|
|
s = migrate_init(¶ms);
|
2011-02-22 23:54:21 +01:00
|
|
|
|
|
|
|
if (strstart(uri, "tcp:", &p)) {
|
2012-10-03 14:34:33 +02:00
|
|
|
ret = tcp_start_outgoing_migration(s, p, &local_err);
|
2011-02-22 23:54:21 +01:00
|
|
|
#if !defined(WIN32)
|
|
|
|
} else if (strstart(uri, "exec:", &p)) {
|
|
|
|
ret = exec_start_outgoing_migration(s, p);
|
|
|
|
} else if (strstart(uri, "unix:", &p)) {
|
|
|
|
ret = unix_start_outgoing_migration(s, p);
|
|
|
|
} else if (strstart(uri, "fd:", &p)) {
|
|
|
|
ret = fd_start_outgoing_migration(s, p);
|
|
|
|
#endif
|
2010-12-13 17:30:12 +01:00
|
|
|
} else {
|
2011-12-05 17:48:01 +01:00
|
|
|
error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
|
|
|
|
return;
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2012-10-03 14:34:33 +02:00
|
|
|
if (ret < 0 || local_err) {
|
2012-10-02 09:59:38 +02:00
|
|
|
migrate_fd_error(s);
|
2012-10-03 14:34:33 +02:00
|
|
|
if (!local_err) {
|
|
|
|
error_set_errno(errp, -ret, QERR_UNDEFINED_ERROR);
|
|
|
|
} else {
|
|
|
|
error_propagate(errp, local_err);
|
2012-05-10 18:28:35 +02:00
|
|
|
}
|
2011-12-05 17:48:01 +01:00
|
|
|
return;
|
2011-11-09 21:29:01 +01:00
|
|
|
}
|
|
|
|
|
2011-10-05 14:27:52 +02:00
|
|
|
notifier_list_notify(&migration_state_notifiers, s);
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-28 01:54:09 +01:00
|
|
|
void qmp_migrate_cancel(Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
2011-10-05 13:50:43 +02:00
|
|
|
migrate_fd_cancel(migrate_get_current());
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2012-08-06 20:42:54 +02:00
|
|
|
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();
|
|
|
|
}
|
|
|
|
|
2011-11-28 14:59:37 +01:00
|
|
|
void qmp_migrate_set_speed(int64_t value, Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
|
|
|
MigrationState *s;
|
|
|
|
|
2011-11-28 14:59:37 +01:00
|
|
|
if (value < 0) {
|
|
|
|
value = 0;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
2011-02-22 23:54:21 +01:00
|
|
|
|
2011-10-05 13:50:43 +02:00
|
|
|
s = migrate_get_current();
|
2011-11-28 14:59:37 +01:00
|
|
|
s->bandwidth_limit = value;
|
2011-02-23 00:33:19 +01:00
|
|
|
qemu_file_set_rate_limit(s->file, s->bandwidth_limit);
|
2011-02-22 23:54:21 +01:00
|
|
|
}
|
|
|
|
|
2011-11-28 02:18:01 +01:00
|
|
|
void qmp_migrate_set_downtime(double value, Error **errp)
|
2011-02-22 23:54:21 +01:00
|
|
|
{
|
2011-11-28 02:18:01 +01:00
|
|
|
value *= 1e9;
|
|
|
|
value = MAX(0, MIN(UINT64_MAX, value));
|
|
|
|
max_downtime = (uint64_t)value;
|
2010-12-13 17:30:12 +01:00
|
|
|
}
|
2012-08-06 20:42:53 +02:00
|
|
|
|
|
|
|
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;
|
|
|
|
}
|