" full copy of disk\n\t\t\t -i for migration without "
"shared storage with incremental copy of disk "
"(base image shared between src and destination)",
- .user_print = monitor_user_noop,
- .mhandler.cmd_new = do_migrate,
+ .mhandler.cmd = hmp_migrate,
},
*/
#include "hmp.h"
+#include "qemu-timer.h"
#include "qmp-commands.h"
static void hmp_handle_error(Monitor *mon, Error **errp)
hmp_handle_error(mon, &error);
}
+
+typedef struct MigrationStatus
+{
+ QEMUTimer *timer;
+ Monitor *mon;
+ bool is_block_migration;
+} MigrationStatus;
+
+static void hmp_migrate_status_cb(void *opaque)
+{
+ MigrationStatus *status = opaque;
+ MigrationInfo *info;
+
+ info = qmp_query_migrate(NULL);
+ if (!info->has_status || strcmp(info->status, "active") == 0) {
+ if (info->has_disk) {
+ int progress;
+
+ if (info->disk->remaining) {
+ progress = info->disk->transferred * 100 / info->disk->total;
+ } else {
+ progress = 100;
+ }
+
+ monitor_printf(status->mon, "Completed %d %%\r", progress);
+ monitor_flush(status->mon);
+ }
+
+ qemu_mod_timer(status->timer, qemu_get_clock_ms(rt_clock) + 1000);
+ } else {
+ if (status->is_block_migration) {
+ monitor_printf(status->mon, "\n");
+ }
+ monitor_resume(status->mon);
+ qemu_del_timer(status->timer);
+ g_free(status);
+ }
+
+ qapi_free_MigrationInfo(info);
+}
+
+void hmp_migrate(Monitor *mon, const QDict *qdict)
+{
+ 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");
+ Error *err = NULL;
+
+ qmp_migrate(uri, !!blk, blk, !!inc, inc, false, false, &err);
+ if (err) {
+ monitor_printf(mon, "migrate: %s\n", error_get_pretty(err));
+ error_free(err);
+ return;
+ }
+
+ if (!detach) {
+ MigrationStatus *status;
+
+ if (monitor_suspend(mon) < 0) {
+ monitor_printf(mon, "terminal does not allow synchronous "
+ "migration, continuing detached\n");
+ return;
+ }
+
+ status = g_malloc0(sizeof(*status));
+ status->mon = mon;
+ status->is_block_migration = blk || inc;
+ status->timer = qemu_new_timer_ms(rt_clock, hmp_migrate_status_cb,
+ status);
+ qemu_mod_timer(status->timer, qemu_get_clock_ms(rt_clock));
+ }
+}
void hmp_block_stream(Monitor *mon, const QDict *qdict);
void hmp_block_job_set_speed(Monitor *mon, const QDict *qdict);
void hmp_block_job_cancel(Monitor *mon, const QDict *qdict);
+void hmp_migrate(Monitor *mon, const QDict *qdict);
#endif
int fd_start_outgoing_migration(MigrationState *s, const char *fdname)
{
- s->fd = monitor_get_fd(s->mon, fdname);
+ s->fd = monitor_get_fd(cur_mon, fdname);
if (s->fd == -1) {
DPRINTF("fd_migration: invalid file descriptor identifier\n");
goto err_after_get_fd;
/* shared migration helpers */
-static void migrate_fd_monitor_suspend(MigrationState *s, Monitor *mon)
-{
- if (monitor_suspend(mon) == 0) {
- DPRINTF("suspending monitor\n");
- } else {
- monitor_printf(mon, "terminal does not allow synchronous "
- "migration, continuing detached\n");
- }
-}
-
static int migrate_fd_cleanup(MigrationState *s)
{
int ret = 0;
DPRINTF("closing file\n");
ret = qemu_fclose(s->file);
s->file = NULL;
- } else {
- if (s->mon) {
- monitor_resume(s->mon);
- }
}
if (s->fd != -1) {
{
MigrationState *s = opaque;
- if (s->mon) {
- monitor_resume(s->mon);
- }
qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL);
return s->close(s);
}
migrate_fd_put_ready(s);
}
-static MigrationState *migrate_init(Monitor *mon, int detach, int blk, int inc)
+static MigrationState *migrate_init(int blk, int inc)
{
MigrationState *s = migrate_get_current();
int64_t bandwidth_limit = s->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->bandwidth_limit = bandwidth_limit;
s->state = MIG_STATE_SETUP;
- if (!detach) {
- migrate_fd_monitor_suspend(s, mon);
- }
-
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)
{
MigrationState *s = migrate_get_current();
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;
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(blk, inc);
if (strstart(uri, "tcp:", &p)) {
ret = tcp_start_outgoing_migration(s, p);
ret = fd_start_outgoing_migration(s, p);
#endif
} else {
- monitor_printf(mon, "unknown migration protocol: %s\n", uri);
- ret = -EINVAL;
+ error_set(errp, QERR_INVALID_PARAMETER_VALUE, "uri", "a valid migration protocol");
+ return;
}
if (ret < 0) {
- monitor_printf(mon, "migration failed: %s\n", strerror(-ret));
- return ret;
- }
-
- if (detach) {
- s->mon = NULL;
+ DPRINTF("migration failed: %s\n", strerror(-ret));
+ /* FIXME: we should return meaningful errors */
+ error_set(errp, QERR_UNDEFINED_ERROR);
+ return;
}
notifier_list_notify(&migration_state_notifiers, s);
- return 0;
}
void qmp_migrate_cancel(Error **errp)
int64_t bandwidth_limit;
QEMUFile *file;
int fd;
- Monitor *mon;
int state;
int (*get_error)(MigrationState *s);
int (*close)(MigrationState *s);
int qemu_start_incoming_migration(const char *uri);
-int do_migrate(Monitor *mon, const QDict *qdict, QObject **ret_data);
-
uint64_t migrate_max_downtime(void);
void do_info_migrate_print(Monitor *mon, const QObject *data);
{ 'command': 'qom-list-types',
'data': { '*implements': 'str', '*abstract': 'bool' },
'returns': [ 'ObjectTypeInfo' ] }
+
+##
+# @migrate
+#
+# Migrates the current running guest to another Virtual Machine.
+#
+# @uri: the Uniform Resource Identifier of the destination VM
+#
+# @blk: #optional do block migration (full disk copy)
+#
+# @inc: #optional incremental disk copy migration
+#
+# @detach: this argument exists only for compatibility reasons and
+# is ignored by QEMU
+#
+# Returns: nothing on success
+#
+# Since: 0.14.0
+##
+{ 'command': 'migrate',
+ 'data': {'uri': 'str', '*blk': 'bool', '*inc': 'bool', '*detach': 'bool' } }
{
.name = "migrate",
.args_type = "detach:-d,blk:-b,inc:-i,uri:s",
- .params = "[-d] [-b] [-i] uri",
- .help = "migrate to URI (using -d to not wait for completion)"
- "\n\t\t\t -b for migration without shared storage with"
- " full copy of disk\n\t\t\t -i for migration without "
- "shared storage with incremental copy of disk "
- "(base image shared between src and destination)",
- .user_print = monitor_user_noop,
- .mhandler.cmd_new = do_migrate,
+ .mhandler.cmd_new = qmp_marshal_input_migrate,
},
SQMP
#define QEMU_VM_SECTION_FULL 0x04
#define QEMU_VM_SUBSECTION 0x05
-bool qemu_savevm_state_blocked(Monitor *mon)
+bool qemu_savevm_state_blocked(Error **errp)
{
SaveStateEntry *se;
QTAILQ_FOREACH(se, &savevm_handlers, entry) {
if (se->no_migrate) {
- monitor_printf(mon, "state blocked by non-migratable device '%s'\n",
- se->idstr);
+ error_set(errp, QERR_MIGRATION_NOT_SUPPORTED, se->idstr);
return true;
}
}
}
}
-static int qemu_savevm_state(Monitor *mon, QEMUFile *f)
+static int qemu_savevm_state(QEMUFile *f)
{
int ret;
- if (qemu_savevm_state_blocked(mon)) {
+ if (qemu_savevm_state_blocked(NULL)) {
ret = -EINVAL;
goto out;
}
unsigned int v;
int ret;
- if (qemu_savevm_state_blocked(default_mon)) {
+ if (qemu_savevm_state_blocked(NULL)) {
return -EINVAL;
}
monitor_printf(mon, "Could not open VM state file\n");
goto the_end;
}
- ret = qemu_savevm_state(mon, f);
+ ret = qemu_savevm_state(f);
vm_state_size = qemu_ftell(f);
qemu_fclose(f);
if (ret < 0) {
void qemu_announce_self(void);
-bool qemu_savevm_state_blocked(Monitor *mon);
+bool qemu_savevm_state_blocked(Error **errp);
int qemu_savevm_state_begin(QEMUFile *f, int blk_enable, int shared);
int qemu_savevm_state_iterate(QEMUFile *f);
int qemu_savevm_state_complete(QEMUFile *f);