diff options
Diffstat (limited to 'migration/migration.c')
| -rw-r--r-- | migration/migration.c | 96 |
1 files changed, 37 insertions, 59 deletions
diff --git a/migration/migration.c b/migration/migration.c index 3ce04b2aaf..98c5c3e140 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -604,7 +604,7 @@ static void process_incoming_migration_bh(void *opaque) */ if (!migrate_late_block_activate() || (autostart && (!global_state_received() || - global_state_get_runstate() == RUN_STATE_RUNNING))) { + runstate_is_live(global_state_get_runstate())))) { /* Make sure all file formats throw away their mutable metadata. * If we get an error here, just don't restart the VM yet. */ bdrv_activate_all(&local_err); @@ -628,7 +628,7 @@ static void process_incoming_migration_bh(void *opaque) dirty_bitmap_mig_before_vm_start(); if (!global_state_received() || - global_state_get_runstate() == RUN_STATE_RUNNING) { + runstate_is_live(global_state_get_runstate())) { if (autostart) { vm_start(); } else { @@ -724,11 +724,8 @@ fail: /** * migration_incoming_setup: Setup incoming migration * @f: file for main migration channel - * @errp: where to put errors - * - * Returns: %true on success, %false on error. */ -static bool migration_incoming_setup(QEMUFile *f, Error **errp) +static void migration_incoming_setup(QEMUFile *f) { MigrationIncomingState *mis = migration_incoming_get_current(); @@ -736,7 +733,6 @@ static bool migration_incoming_setup(QEMUFile *f, Error **errp) mis->from_src_file = f; } qemu_file_set_blocking(f, false); - return true; } void migration_incoming_process(void) @@ -778,11 +774,9 @@ static bool postcopy_try_recover(void) return false; } -void migration_fd_process_incoming(QEMUFile *f, Error **errp) +void migration_fd_process_incoming(QEMUFile *f) { - if (!migration_incoming_setup(f, errp)) { - return; - } + migration_incoming_setup(f); if (postcopy_try_recover()) { return; } @@ -836,10 +830,9 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) * issue is not possible. */ ret = migration_channel_read_peek(ioc, (void *)&channel_magic, - sizeof(channel_magic), &local_err); + sizeof(channel_magic), errp); if (ret != 0) { - error_propagate(errp, local_err); return; } @@ -849,16 +842,12 @@ void migration_ioc_process_incoming(QIOChannel *ioc, Error **errp) } if (multifd_load_setup(errp) != 0) { - error_setg(errp, "Failed to setup multifd channels"); return; } if (default_channel) { f = qemu_file_new_input(ioc); - - if (!migration_incoming_setup(f, errp)) { - return; - } + migration_incoming_setup(f); } else { /* Multiple connections */ assert(migration_needs_multiple_sockets()); @@ -1294,12 +1283,12 @@ static void migrate_fd_cleanup(MigrationState *s) QEMUFile *tmp; trace_migrate_fd_cleanup(); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (s->migration_thread_running) { qemu_thread_join(&s->thread); s->migration_thread_running = false; } - qemu_mutex_lock_iothread(); + bql_lock(); multifd_save_cleanup(); qemu_mutex_lock(&s->qemu_file_lock); @@ -1588,7 +1577,6 @@ int migrate_init(MigrationState *s, Error **errp) s->migration_thread_running = false; error_free(s->error); s->error = NULL; - s->hostname = NULL; s->vmdesc = NULL; migrate_set_state(&s->state, MIGRATION_STATUS_NONE, MIGRATION_STATUS_SETUP); @@ -1836,8 +1824,6 @@ bool migration_is_blocked(Error **errp) static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, bool resume, Error **errp) { - Error *local_err = NULL; - if (blk_inc) { warn_report("parameter 'inc' is deprecated;" " use blockdev-mirror with NBD instead"); @@ -1907,8 +1893,7 @@ static bool migrate_prepare(MigrationState *s, bool blk, bool blk_inc, "current migration capabilities"); return false; } - if (!migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, true, &local_err)) { - error_propagate(errp, local_err); + if (!migrate_cap_set(MIGRATION_CAPABILITY_BLOCK, true, errp)) { return false; } s->must_remove_block_options = true; @@ -2411,12 +2396,11 @@ static int postcopy_start(MigrationState *ms, Error **errp) } trace_postcopy_start(); - qemu_mutex_lock_iothread(); + bql_lock(); trace_postcopy_start_set_run(); migration_downtime_start(ms); - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); global_state_store(); ret = migration_stop_vm(RUN_STATE_FINISH_MIGRATE); if (ret < 0) { @@ -2520,7 +2504,7 @@ static int postcopy_start(MigrationState *ms, Error **errp) migration_downtime_end(ms); - qemu_mutex_unlock_iothread(); + bql_unlock(); if (migrate_postcopy_ram()) { /* @@ -2561,13 +2545,13 @@ fail: error_report_err(local_err); } } - qemu_mutex_unlock_iothread(); + bql_unlock(); return -1; } /** * migration_maybe_pause: Pause if required to by - * migrate_pause_before_switchover called with the iothread locked + * migrate_pause_before_switchover called with the BQL locked * Returns: 0 on success */ static int migration_maybe_pause(MigrationState *s, @@ -2595,14 +2579,14 @@ static int migration_maybe_pause(MigrationState *s, * wait for the 'pause_sem' semaphore. */ if (s->state != MIGRATION_STATUS_CANCELLING) { - qemu_mutex_unlock_iothread(); + bql_unlock(); migrate_set_state(&s->state, *current_active_state, MIGRATION_STATUS_PRE_SWITCHOVER); qemu_sem_wait(&s->pause_sem); migrate_set_state(&s->state, MIGRATION_STATUS_PRE_SWITCHOVER, new_state); *current_active_state = new_state; - qemu_mutex_lock_iothread(); + bql_lock(); } return s->state == new_state ? 0 : -EINVAL; @@ -2613,9 +2597,8 @@ static int migration_completion_precopy(MigrationState *s, { int ret; - qemu_mutex_lock_iothread(); + bql_lock(); migration_downtime_start(s); - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); s->vm_old_state = runstate_get(); global_state_store(); @@ -2641,7 +2624,7 @@ static int migration_completion_precopy(MigrationState *s, ret = qemu_savevm_state_complete_precopy(s->to_dst_file, false, s->block_inactive); out_unlock: - qemu_mutex_unlock_iothread(); + bql_unlock(); return ret; } @@ -2649,9 +2632,9 @@ static void migration_completion_postcopy(MigrationState *s) { trace_migration_completion_postcopy_end(); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_complete_postcopy(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); /* * Shutdown the postcopy fast path thread. This is only needed when dest @@ -2675,14 +2658,14 @@ static void migration_completion_failed(MigrationState *s, */ Error *local_err = NULL; - qemu_mutex_lock_iothread(); + bql_lock(); bdrv_activate_all(&local_err); if (local_err) { error_report_err(local_err); } else { s->block_inactive = false; } - qemu_mutex_unlock_iothread(); + bql_unlock(); } migrate_set_state(&s->state, current_active_state, @@ -3122,7 +3105,7 @@ static void migration_iteration_finish(MigrationState *s) /* If we enabled cpu throttling for auto-converge, turn it off. */ cpu_throttle_stop(); - qemu_mutex_lock_iothread(); + bql_lock(); switch (s->state) { case MIGRATION_STATUS_COMPLETED: migration_calculate_complete(s); @@ -3136,7 +3119,7 @@ static void migration_iteration_finish(MigrationState *s) case MIGRATION_STATUS_FAILED: case MIGRATION_STATUS_CANCELLED: case MIGRATION_STATUS_CANCELLING: - if (s->vm_old_state == RUN_STATE_RUNNING) { + if (runstate_is_live(s->vm_old_state)) { if (!runstate_check(RUN_STATE_SHUTDOWN)) { vm_start(); } @@ -3153,7 +3136,7 @@ static void migration_iteration_finish(MigrationState *s) break; } migrate_fd_cleanup_schedule(s); - qemu_mutex_unlock_iothread(); + bql_unlock(); } static void bg_migration_iteration_finish(MigrationState *s) @@ -3165,7 +3148,7 @@ static void bg_migration_iteration_finish(MigrationState *s) */ ram_write_tracking_stop(); - qemu_mutex_lock_iothread(); + bql_lock(); switch (s->state) { case MIGRATION_STATUS_COMPLETED: migration_calculate_complete(s); @@ -3184,7 +3167,7 @@ static void bg_migration_iteration_finish(MigrationState *s) } migrate_fd_cleanup_schedule(s); - qemu_mutex_unlock_iothread(); + bql_unlock(); } /* @@ -3306,9 +3289,9 @@ static void *migration_thread(void *opaque) object_ref(OBJECT(s)); update_iteration_initial_status(s); - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_header(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); /* * If we opened the return path, we need to make sure dst has it @@ -3336,9 +3319,9 @@ static void *migration_thread(void *opaque) qemu_savevm_send_colo_enable(s->to_dst_file); } - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_setup(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); @@ -3392,7 +3375,7 @@ static void bg_migration_vm_start_bh(void *opaque) qemu_bh_delete(s->vm_start_bh); s->vm_start_bh = NULL; - vm_start(); + vm_resume(s->vm_old_state); migration_downtime_end(s); } @@ -3449,10 +3432,10 @@ static void *bg_migration_thread(void *opaque) ram_write_tracking_prepare(); #endif - qemu_mutex_lock_iothread(); + bql_lock(); qemu_savevm_state_header(s->to_dst_file); qemu_savevm_state_setup(s->to_dst_file); - qemu_mutex_unlock_iothread(); + bql_unlock(); qemu_savevm_wait_unplug(s, MIGRATION_STATUS_SETUP, MIGRATION_STATUS_ACTIVE); @@ -3462,13 +3445,8 @@ static void *bg_migration_thread(void *opaque) trace_migration_thread_setup_complete(); migration_downtime_start(s); - qemu_mutex_lock_iothread(); + bql_lock(); - /* - * If VM is currently in suspended state, then, to make a valid runstate - * transition in vm_stop_force_state() we need to wakeup it up. - */ - qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER, NULL); s->vm_old_state = runstate_get(); global_state_store(); @@ -3505,7 +3483,7 @@ static void *bg_migration_thread(void *opaque) s->vm_start_bh = qemu_bh_new(bg_migration_vm_start_bh, s); qemu_bh_schedule(s->vm_start_bh); - qemu_mutex_unlock_iothread(); + bql_unlock(); while (migration_is_active(s)) { MigIterateState iter_state = bg_migration_iteration_run(s); @@ -3534,7 +3512,7 @@ fail: if (early_fail) { migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); - qemu_mutex_unlock_iothread(); + bql_unlock(); } bg_migration_iteration_finish(s); |