Switch from normal migration loadvm process into COLO checkpoint process if COLO mode is enabled. We add three new members to struct MigrationIncomingState, 'have_colo_incoming_thread' and 'colo_incoming_thread' record the colo related threads for secondary VM, 'migration_incoming_co' records the original migration incoming coroutine.
Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com> Signed-off-by: Li Zhijian <lizhij...@cn.fujitsu.com> Reviewed-by: Dr. David Alan Gilbert <dgilb...@redhat.com> --- v12: - Add Reviewed-by tag v11: - We moved the place of bdrv_invalidate_cache_all(), but done the deleting work in other patch. Fix it. - Add documentation for colo in 'MigrationStatus' (Eric's review comment) v10: - fix a bug about fd leak which is found by Dave. --- include/migration/colo.h | 7 +++++++ include/migration/migration.h | 7 +++++++ migration/colo-comm.c | 10 ++++++++++ migration/colo.c | 22 ++++++++++++++++++++++ migration/migration.c | 31 +++++++++++++++++++++---------- stubs/migration-colo.c | 10 ++++++++++ 6 files changed, 77 insertions(+), 10 deletions(-) diff --git a/include/migration/colo.h b/include/migration/colo.h index bf84b99..b40676c 100644 --- a/include/migration/colo.h +++ b/include/migration/colo.h @@ -15,6 +15,8 @@ #include "qemu-common.h" #include "migration/migration.h" +#include "qemu/coroutine_int.h" +#include "qemu/thread.h" bool colo_supported(void); void colo_info_init(void); @@ -22,4 +24,9 @@ void colo_info_init(void); void migrate_start_colo_process(MigrationState *s); bool migration_in_colo_state(void); +/* loadvm */ +bool migration_incoming_enable_colo(void); +void migration_incoming_exit_colo(void); +void *colo_process_incoming_thread(void *opaque); +bool migration_incoming_in_colo_state(void); #endif diff --git a/include/migration/migration.h b/include/migration/migration.h index c962ad4..e7a516c 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -22,6 +22,7 @@ #include "migration/vmstate.h" #include "qapi-types.h" #include "exec/cpu-common.h" +#include "qemu/coroutine_int.h" #define QEMU_VM_FILE_MAGIC 0x5145564d #define QEMU_VM_FILE_VERSION_COMPAT 0x00000002 @@ -106,6 +107,12 @@ struct MigrationIncomingState { void *postcopy_tmp_page; int state; + + bool have_colo_incoming_thread; + QemuThread colo_incoming_thread; + /* The coroutine we should enter (back) after failover */ + Coroutine *migration_incoming_co; + /* See savevm.c */ LoadStateEntry_Head loadvm_handlers; }; diff --git a/migration/colo-comm.c b/migration/colo-comm.c index 723d86d..c36d13f 100644 --- a/migration/colo-comm.c +++ b/migration/colo-comm.c @@ -48,3 +48,13 @@ void colo_info_init(void) { vmstate_register(NULL, 0, &colo_state, &colo_info); } + +bool migration_incoming_enable_colo(void) +{ + return colo_info.colo_requested; +} + +void migration_incoming_exit_colo(void) +{ + colo_info.colo_requested = 0; +} diff --git a/migration/colo.c b/migration/colo.c index 8d0d851..20052d9 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -13,6 +13,7 @@ #include "sysemu/sysemu.h" #include "migration/colo.h" #include "trace.h" +#include "qemu/error-report.h" bool colo_supported(void) { @@ -26,6 +27,13 @@ bool migration_in_colo_state(void) return (s->state == MIGRATION_STATUS_COLO); } +bool migration_incoming_in_colo_state(void) +{ + MigrationIncomingState *mis = migration_incoming_get_current(); + + return mis && (mis->state == MIGRATION_STATUS_COLO); +} + static void colo_process_checkpoint(MigrationState *s) { qemu_mutex_lock_iothread(); @@ -47,3 +55,17 @@ void migrate_start_colo_process(MigrationState *s) colo_process_checkpoint(s); qemu_mutex_lock_iothread(); } + +void *colo_process_incoming_thread(void *opaque) +{ + MigrationIncomingState *mis = opaque; + + migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, + MIGRATION_STATUS_COLO); + + /* TODO: COLO checkpoint restore loop */ + + migration_incoming_exit_colo(); + + return NULL; +} diff --git a/migration/migration.c b/migration/migration.c index df739b5..32d4f51 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -359,6 +359,27 @@ static void process_incoming_migration_co(void *opaque) /* Else if something went wrong then just fall out of the normal exit */ } + if (!ret) { + /* Make sure all file formats flush their mutable metadata */ + bdrv_invalidate_cache_all(&local_err); + if (local_err) { + error_report_err(local_err); + migrate_decompress_threads_join(); + exit(EXIT_FAILURE); + } + } + /* we get colo info, and know if we are in colo mode */ + if (!ret && migration_incoming_enable_colo()) { + mis->migration_incoming_co = qemu_coroutine_self(); + qemu_thread_create(&mis->colo_incoming_thread, "colo incoming", + colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); + mis->have_colo_incoming_thread = true; + qemu_coroutine_yield(); + + /* Wait checkpoint incoming thread exit before free resource */ + qemu_thread_join(&mis->colo_incoming_thread); + } + qemu_fclose(f); free_xbzrle_decoded_buf(); @@ -370,16 +391,6 @@ static void process_incoming_migration_co(void *opaque) exit(EXIT_FAILURE); } - /* Make sure all file formats flush their mutable metadata */ - bdrv_invalidate_cache_all(&local_err); - if (local_err) { - migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, - MIGRATION_STATUS_FAILED); - error_report_err(local_err); - migrate_decompress_threads_join(); - exit(EXIT_FAILURE); - } - /* * This must happen after all error conditions are dealt with and * we're sure the VM is going to be running on this host. diff --git a/stubs/migration-colo.c b/stubs/migration-colo.c index 41fed49..b6f3190 100644 --- a/stubs/migration-colo.c +++ b/stubs/migration-colo.c @@ -22,6 +22,16 @@ bool migration_in_colo_state(void) return false; } +bool migration_incoming_in_colo_state(void) +{ + return false; +} + void migrate_start_colo_process(MigrationState *s) { } + +void *colo_process_incoming_thread(void *opaque) +{ + return NULL; +} -- 1.8.3.1