diff options
-rw-r--r-- | include/migration/register.h | 2 | ||||
-rw-r--r-- | migration/migration.c | 20 | ||||
-rw-r--r-- | migration/savevm.c | 25 | ||||
-rw-r--r-- | migration/savevm.h | 1 | ||||
-rw-r--r-- | migration/trace-events | 1 |
5 files changed, 48 insertions, 1 deletions
diff --git a/include/migration/register.h b/include/migration/register.h index f6f12f9b1a..d287f4c317 100644 --- a/include/migration/register.h +++ b/include/migration/register.h @@ -64,6 +64,8 @@ typedef struct SaveVMHandlers { LoadStateHandler *load_state; int (*load_setup)(QEMUFile *f, void *opaque); int (*load_cleanup)(void *opaque); + /* Called when postcopy migration wants to resume from failure */ + int (*resume_prepare)(MigrationState *s, void *opaque); } SaveVMHandlers; int register_savevm_live(DeviceState *dev, diff --git a/migration/migration.c b/migration/migration.c index 4f2c6d22d1..b0217c4823 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -2454,7 +2454,25 @@ typedef enum MigThrError { /* Return zero if success, or <0 for error */ static int postcopy_do_resume(MigrationState *s) { - /* TODO: do the resume logic */ + int ret; + + /* + * Call all the resume_prepare() hooks, so that modules can be + * ready for the migration resume. + */ + ret = qemu_savevm_state_resume_prepare(s); + if (ret) { + error_report("%s: resume_prepare() failure detected: %d", + __func__, ret); + return ret; + } + + /* + * TODO: handshake with dest using MIG_CMD_RESUME, + * MIG_RP_MSG_RESUME_ACK, then switch source state to + * "postcopy-active" + */ + return 0; } diff --git a/migration/savevm.c b/migration/savevm.c index 6a2d77cbf3..8e7653badc 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -1031,6 +1031,31 @@ void qemu_savevm_state_setup(QEMUFile *f) } } +int qemu_savevm_state_resume_prepare(MigrationState *s) +{ + SaveStateEntry *se; + int ret; + + trace_savevm_state_resume_prepare(); + + QTAILQ_FOREACH(se, &savevm_state.handlers, entry) { + if (!se->ops || !se->ops->resume_prepare) { + continue; + } + if (se->ops && se->ops->is_active) { + if (!se->ops->is_active(se->opaque)) { + continue; + } + } + ret = se->ops->resume_prepare(s, se->opaque); + if (ret < 0) { + return ret; + } + } + + return 0; +} + /* * this function has three return values: * negative: there was one error, and we have -errno. diff --git a/migration/savevm.h b/migration/savevm.h index b24ff073ad..a5e65b8ae3 100644 --- a/migration/savevm.h +++ b/migration/savevm.h @@ -31,6 +31,7 @@ bool qemu_savevm_state_blocked(Error **errp); void qemu_savevm_state_setup(QEMUFile *f); +int qemu_savevm_state_resume_prepare(MigrationState *s); void qemu_savevm_state_header(QEMUFile *f); int qemu_savevm_state_iterate(QEMUFile *f, bool postcopy); void qemu_savevm_state_cleanup(void); diff --git a/migration/trace-events b/migration/trace-events index 40a7217829..be36fbccfe 100644 --- a/migration/trace-events +++ b/migration/trace-events @@ -39,6 +39,7 @@ savevm_send_postcopy_run(void) "" savevm_send_postcopy_resume(void) "" savevm_send_recv_bitmap(char *name) "%s" savevm_state_setup(void) "" +savevm_state_resume_prepare(void) "" savevm_state_header(void) "" savevm_state_iterate(void) "" savevm_state_cleanup(void) "" |