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;
int compress_level = s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL];
int compress_thread_count =
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS];
int decompress_thread_count =
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS];
memcpy(enabled_capabilities, s->enabled_capabilities,
sizeof(enabled_capabilities));
memset(s, 0, sizeof(*s));
s->params = *params;
memcpy(s->enabled_capabilities, enabled_capabilities,
sizeof(enabled_capabilities));
s->xbzrle_cache_size = xbzrle_cache_size;
s->parameters[MIGRATION_PARAMETER_COMPRESS_LEVEL] = compress_level;
s->parameters[MIGRATION_PARAMETER_COMPRESS_THREADS] =
compress_thread_count;
s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS] =
decompress_thread_count;
s->bandwidth_limit = bandwidth_limit;
s->state = MIGRATION_STATUS_SETUP;
trace_migrate_set_state(MIGRATION_STATUS_SETUP);
s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
return s;
}
void migrate_fd_error(MigrationState *s)
{
DPRINTF("setting error state\n");
assert(s->file == NULL);
s->state = MIG_STATE_ERROR;
trace_migrate_set_state(MIG_STATE_ERROR);
notifier_list_notify(&migration_state_notifiers, s);
}
void migrate_fd_error(MigrationState *s)
{
trace_migrate_fd_error();
assert(s->file == NULL);
s->state = MIGRATION_STATUS_FAILED;
trace_migrate_set_state(MIGRATION_STATUS_FAILED);
notifier_list_notify(&migration_state_notifiers, s);
}
void migrate_fd_connect(MigrationState *s)
{
s->state = MIG_STATE_ACTIVE;
trace_migrate_set_state(MIG_STATE_ACTIVE);
/* This is a best 1st approximation. ns to ms */
s->expected_downtime = max_downtime/1000000;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
qemu_file_set_rate_limit(s->file,
s->bandwidth_limit / XFER_LIMIT_RATIO);
qemu_thread_create(&s->thread, migration_thread, s,
QEMU_THREAD_JOINABLE);
notifier_list_notify(&migration_state_notifiers, s);
}
void migrate_fd_connect(MigrationState *s)
{
s->state = MIGRATION_STATUS_SETUP;
trace_migrate_set_state(MIGRATION_STATUS_SETUP);
/* This is a best 1st approximation. ns to ms */
s->expected_downtime = max_downtime/1000000;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
qemu_file_set_rate_limit(s->file,
s->bandwidth_limit / XFER_LIMIT_RATIO);
/* Notify before starting migration thread */
notifier_list_notify(&migration_state_notifiers, s);
migrate_compress_threads_create();
qemu_thread_create(&s->thread, "migration", migration_thread, s,
QEMU_THREAD_JOINABLE);
}
MigrationState *tcp_start_outgoing_migration(Monitor *mon,
const char *host_port,
int64_t bandwidth_limit,
int detach,
int blk,
int inc,
Error **errp)
{
FdMigrationState *s;
s = qemu_mallocz(sizeof(*s));
s->get_error = socket_errno;
s->write = socket_write;
s->close = tcp_close;
s->mig_state.cancel = migrate_fd_cancel;
s->mig_state.get_status = migrate_fd_get_status;
s->mig_state.release = migrate_fd_release;
s->mig_state.blk = blk;
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
trace_migrate_set_state(MIG_STATE_ACTIVE);
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
s->fd = inet_nonblocking_connect(host_port, tcp_wait_for_connect, s,
errp);
if (error_is_set(errp)) {
migrate_fd_error(s);
qemu_free(s);
return NULL;
}
return &s->mig_state;
}
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->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;
trace_migrate_set_state(MIG_STATE_SETUP);
s->total_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
return s;
}
static void migrate_set_state(MigrationState *s, int old_state, int new_state)
{
if (atomic_cmpxchg(&s->state, old_state, new_state) == new_state) {
trace_migrate_set_state(new_state);
}
}
static void migrate_finish_set_state(MigrationState *s, int new_state)
{
if (atomic_cmpxchg(&s->state, MIG_STATE_ACTIVE, new_state) == new_state) {
trace_migrate_set_state(new_state);
}
}
MigrationState *unix_start_outgoing_migration(Monitor *mon,
const char *path,
size_t bandwidth_limit,
int detach,
int blk,
int inc)
{
FdMigrationState *s;
struct sockaddr_un addr;
int ret;
addr.sun_family = AF_UNIX;
snprintf(addr.sun_path, sizeof(addr.sun_path), "%s", path);
s = qemu_mallocz(sizeof(*s));
s->get_error = unix_errno;
s->write = unix_write;
s->close = unix_close;
s->mig_state.cancel = migrate_fd_cancel;
s->mig_state.get_status = migrate_fd_get_status;
s->mig_state.release = migrate_fd_release;
s->mig_state.blk = blk;
s->mig_state.shared = inc;
s->state = MIG_STATE_ACTIVE;
trace_migrate_set_state(MIG_STATE_ACTIVE);
s->mon = NULL;
s->bandwidth_limit = bandwidth_limit;
s->fd = qemu_socket(PF_UNIX, SOCK_STREAM, 0);
if (s->fd < 0) {
DPRINTF("Unable to open socket");
goto err_after_alloc;
}
socket_set_nonblock(s->fd);
do {
ret = connect(s->fd, (struct sockaddr *)&addr, sizeof(addr));
if (ret == -1)
ret = -(s->get_error(s));
if (ret == -EINPROGRESS || ret == -EWOULDBLOCK)
qemu_set_fd_handler2(s->fd, NULL, NULL, unix_wait_for_connect, s);
} while (ret == -EINTR);
if (ret < 0 && ret != -EINPROGRESS && ret != -EWOULDBLOCK) {
DPRINTF("connect failed\n");
goto err_after_open;
}
if (!detach) {
migrate_fd_monitor_suspend(s, mon);
}
if (ret >= 0)
migrate_fd_connect(s);
return &s->mig_state;
err_after_open:
close(s->fd);
err_after_alloc:
qemu_free(s);
return NULL;
}