From 51e47cf8600dab5beedd7fa369ffd645868672ec Mon Sep 17 00:00:00 2001 From: Vladimir Sementsov-Ogievskiy Date: Fri, 28 Apr 2023 22:49:21 +0300 Subject: [PATCH] build: move COLO under CONFIG_REPLICATION We don't allow to use x-colo capability when replication is not configured. So, no reason to build COLO when replication is disabled, it's unusable in this case. Note also that the check in migrate_caps_check() is not the only restriction: some functions in migration/colo.c will just abort if called with not defined CONFIG_REPLICATION, for example: migration_iteration_finish() case MIGRATION_STATUS_COLO: migrate_start_colo_process() colo_process_checkpoint() abort() It could probably make sense to have possibility to enable COLO without REPLICATION, but this requires deeper audit of colo & replication code, which may be done later if needed. Signed-off-by: Vladimir Sementsov-Ogievskiy Acked-by: Dr. David Alan Gilbert Reviewed-by: Juan Quintela Message-Id: <20230428194928.1426370-4-vsementsov@yandex-team.ru> Signed-off-by: Juan Quintela --- hmp-commands.hx | 2 ++ migration/colo.c | 28 ------------------------ migration/meson.build | 6 ++++-- migration/migration-hmp-cmds.c | 2 ++ migration/migration.c | 6 ++++++ qapi/migration.json | 9 +++++--- stubs/colo.c | 39 ++++++++++++++++++++++++++++++++++ stubs/meson.build | 1 + 8 files changed, 60 insertions(+), 33 deletions(-) create mode 100644 stubs/colo.c diff --git a/hmp-commands.hx b/hmp-commands.hx index 9afbb54a51..2cbd0f77a0 100644 --- a/hmp-commands.hx +++ b/hmp-commands.hx @@ -1052,6 +1052,7 @@ SRST migration (or once already in postcopy). ERST +#ifdef CONFIG_REPLICATION { .name = "x_colo_lost_heartbeat", .args_type = "", @@ -1060,6 +1061,7 @@ ERST "a failover or takeover is needed.", .cmd = hmp_x_colo_lost_heartbeat, }, +#endif SRST ``x_colo_lost_heartbeat`` diff --git a/migration/colo.c b/migration/colo.c index c9e0b909b9..6c7c313956 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -26,9 +26,7 @@ #include "qemu/rcu.h" #include "migration/failover.h" #include "migration/ram.h" -#ifdef CONFIG_REPLICATION #include "block/replication.h" -#endif #include "net/colo-compare.h" #include "net/colo.h" #include "block/block.h" @@ -86,7 +84,6 @@ void colo_checkpoint_delay_set(void) static void secondary_vm_do_failover(void) { /* COLO needs enable block-replication */ -#ifdef CONFIG_REPLICATION int old_state; MigrationIncomingState *mis = migration_incoming_get_current(); Error *local_err = NULL; @@ -151,14 +148,10 @@ static void secondary_vm_do_failover(void) if (mis->migration_incoming_co) { qemu_coroutine_enter(mis->migration_incoming_co); } -#else - abort(); -#endif } static void primary_vm_do_failover(void) { -#ifdef CONFIG_REPLICATION MigrationState *s = migrate_get_current(); int old_state; Error *local_err = NULL; @@ -199,9 +192,6 @@ static void primary_vm_do_failover(void) /* Notify COLO thread that failover work is finished */ qemu_sem_post(&s->colo_exit_sem); -#else - abort(); -#endif } COLOMode get_colo_mode(void) @@ -235,7 +225,6 @@ void colo_do_failover(void) } } -#ifdef CONFIG_REPLICATION void qmp_xen_set_replication(bool enable, bool primary, bool has_failover, bool failover, Error **errp) @@ -289,7 +278,6 @@ void qmp_xen_colo_do_checkpoint(Error **errp) /* Notify all filters of all NIC to do checkpoint */ colo_notify_filters_event(COLO_EVENT_CHECKPOINT, errp); } -#endif COLOStatus *qmp_query_colo_status(Error **errp) { @@ -453,15 +441,11 @@ static int colo_do_checkpoint_transaction(MigrationState *s, } qemu_mutex_lock_iothread(); -#ifdef CONFIG_REPLICATION replication_do_checkpoint_all(&local_err); if (local_err) { qemu_mutex_unlock_iothread(); goto out; } -#else - abort(); -#endif colo_send_message(s->to_dst_file, COLO_MESSAGE_VMSTATE_SEND, &local_err); if (local_err) { @@ -579,15 +563,11 @@ static void colo_process_checkpoint(MigrationState *s) object_unref(OBJECT(bioc)); qemu_mutex_lock_iothread(); -#ifdef CONFIG_REPLICATION replication_start_all(REPLICATION_MODE_PRIMARY, &local_err); if (local_err) { qemu_mutex_unlock_iothread(); goto out; } -#else - abort(); -#endif vm_start(); qemu_mutex_unlock_iothread(); @@ -755,7 +735,6 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, return; } -#ifdef CONFIG_REPLICATION replication_get_error_all(&local_err); if (local_err) { error_propagate(errp, local_err); @@ -772,9 +751,6 @@ static void colo_incoming_process_checkpoint(MigrationIncomingState *mis, qemu_mutex_unlock_iothread(); return; } -#else - abort(); -#endif /* Notify all filters of all NIC to do checkpoint */ colo_notify_filters_event(COLO_EVENT_CHECKPOINT, &local_err); @@ -881,15 +857,11 @@ void *colo_process_incoming_thread(void *opaque) object_unref(OBJECT(bioc)); qemu_mutex_lock_iothread(); -#ifdef CONFIG_REPLICATION replication_start_all(REPLICATION_MODE_SECONDARY, &local_err); if (local_err) { qemu_mutex_unlock_iothread(); goto out; } -#else - abort(); -#endif vm_start(); qemu_mutex_unlock_iothread(); trace_colo_vm_state_change("stop", "run"); diff --git a/migration/meson.build b/migration/meson.build index 75de868bb7..eb41b77db9 100644 --- a/migration/meson.build +++ b/migration/meson.build @@ -13,8 +13,6 @@ softmmu_ss.add(files( 'block-dirty-bitmap.c', 'channel.c', 'channel-block.c', - 'colo-failover.c', - 'colo.c', 'exec.c', 'fd.c', 'global_state.c', @@ -33,6 +31,10 @@ softmmu_ss.add(files( 'threadinfo.c', ), gnutls) +if get_option('replication').allowed() + softmmu_ss.add(files('colo-failover.c', 'colo.c')) +endif + softmmu_ss.add(when: rdma, if_true: files('rdma.c')) if get_option('live_block_migration').allowed() softmmu_ss.add(files('block.c')) diff --git a/migration/migration-hmp-cmds.c b/migration/migration-hmp-cmds.c index 4e9f00e7dc..9885d7c9f7 100644 --- a/migration/migration-hmp-cmds.c +++ b/migration/migration-hmp-cmds.c @@ -643,6 +643,7 @@ void hmp_migrate_start_postcopy(Monitor *mon, const QDict *qdict) hmp_handle_error(mon, err); } +#ifdef CONFIG_REPLICATION void hmp_x_colo_lost_heartbeat(Monitor *mon, const QDict *qdict) { Error *err = NULL; @@ -650,6 +651,7 @@ void hmp_x_colo_lost_heartbeat(Monitor *mon, const QDict *qdict) qmp_x_colo_lost_heartbeat(&err); hmp_handle_error(mon, err); } +#endif typedef struct HMPMigrationStatus { QEMUTimer *timer; diff --git a/migration/migration.c b/migration/migration.c index f9f12a17b5..61b316245d 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -392,6 +392,12 @@ void migration_incoming_disable_colo(void) int migration_incoming_enable_colo(void) { +#ifndef CONFIG_REPLICATION + error_report("ENABLE_COLO command come in migration stream, but COLO " + "module is not built in"); + return -ENOTSUP; +#endif + if (ram_block_discard_disable(true)) { error_report("COLO: cannot disable RAM discard"); return -EBUSY; diff --git a/qapi/migration.json b/qapi/migration.json index 952d3e2c9a..179af0c4d8 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -1366,7 +1366,8 @@ # <- { "return": {} } ## { 'command': 'x-colo-lost-heartbeat', - 'features': [ 'unstable' ] } + 'features': [ 'unstable' ], + 'if': 'CONFIG_REPLICATION' } ## # @migrate_cancel: @@ -1638,7 +1639,8 @@ ## { 'struct': 'COLOStatus', 'data': { 'mode': 'COLOMode', 'last-mode': 'COLOMode', - 'reason': 'COLOExitReason' } } + 'reason': 'COLOExitReason' }, + 'if': 'CONFIG_REPLICATION' } ## # @query-colo-status: @@ -1655,7 +1657,8 @@ # Since: 3.1 ## { 'command': 'query-colo-status', - 'returns': 'COLOStatus' } + 'returns': 'COLOStatus', + 'if': 'CONFIG_REPLICATION' } ## # @migrate-recover: diff --git a/stubs/colo.c b/stubs/colo.c new file mode 100644 index 0000000000..cf9816d368 --- /dev/null +++ b/stubs/colo.c @@ -0,0 +1,39 @@ +#include "qemu/osdep.h" +#include "qemu/notify.h" +#include "net/colo-compare.h" +#include "migration/colo.h" +#include "migration/migration.h" +#include "qemu/error-report.h" +#include "qapi/qapi-commands-migration.h" + +void colo_shutdown(void) +{ +} + +void *colo_process_incoming_thread(void *opaque) +{ + error_report("Impossible happend: trying to start COLO thread when COLO " + "module is not built in"); + abort(); +} + +void colo_checkpoint_delay_set(void) +{ +} + +void migrate_start_colo_process(MigrationState *s) +{ + error_report("Impossible happend: trying to start COLO when COLO " + "module is not built in"); + abort(); +} + +bool migration_in_colo_state(void) +{ + return false; +} + +bool migration_incoming_in_colo_state(void) +{ + return false; +} diff --git a/stubs/meson.build b/stubs/meson.build index b2b5956d97..8412cad15f 100644 --- a/stubs/meson.build +++ b/stubs/meson.build @@ -45,6 +45,7 @@ stub_ss.add(files('target-get-monitor-def.c')) stub_ss.add(files('target-monitor-defs.c')) stub_ss.add(files('trace-control.c')) stub_ss.add(files('uuid.c')) +stub_ss.add(files('colo.c')) stub_ss.add(files('vmstate.c')) stub_ss.add(files('vm-stop.c')) stub_ss.add(files('win32-kbd-hook.c'))