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migration: cleanup migration (including thread) in the iothread

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Perform final cleanup in a bottom half, and add joining the thread to
the series of cleanup actions.

migrate_fd_error remains for connection error, but it doesn't need
to cleanup anything anymore.

Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
This commit is contained in:
Paolo Bonzini 2013-02-22 17:36:21 +01:00 committed by Juan Quintela
parent f4410a5d99
commit bb1fadc444
2 changed files with 21 additions and 18 deletions
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1
include/migration/migration.h
View File

@ -38,6 +38,7 @@ struct MigrationState
size_t buffer_size;
size_t buffer_capacity;
QemuThread thread;
QEMUBH *cleanup_bh;
QEMUFile *file;
int fd;

38
migration.c
View File

@ -261,8 +261,13 @@ void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
/* shared migration helpers */
static void migrate_fd_cleanup(MigrationState *s)
static void migrate_fd_cleanup(void *opaque)
{
MigrationState *s = opaque;
qemu_bh_delete(s->cleanup_bh);
s->cleanup_bh = NULL;
if (s->file) {
DPRINTF("closing file\n");
qemu_fclose(s->file);
@ -290,15 +295,10 @@ static void migrate_finish_set_state(MigrationState *s, int new_state)
void migrate_fd_error(MigrationState *s)
{
DPRINTF("setting error state\n");
migrate_finish_set_state(s, MIG_STATE_ERROR);
migrate_fd_cleanup(s);
}
static void migrate_fd_completed(MigrationState *s)
{
DPRINTF("setting completed state\n");
migrate_finish_set_state(s, MIG_STATE_COMPLETED);
migrate_fd_cleanup(s);
assert(s->file == NULL);
s->state = MIG_STATE_ERROR;
trace_migrate_set_state(MIG_STATE_ERROR);
notifier_list_notify(&migration_state_notifiers, s);
}
static ssize_t migrate_fd_put_buffer(MigrationState *s, const void *data,
@ -325,7 +325,6 @@ static void migrate_fd_cancel(MigrationState *s)
DPRINTF("cancelling migration\n");
migrate_finish_set_state(s, MIG_STATE_CANCELLED);
migrate_fd_cleanup(s);
}
int migrate_fd_close(MigrationState *s)
@ -590,6 +589,11 @@ static int buffered_close(void *opaque)
DPRINTF("closing\n");
qemu_mutex_unlock_iothread();
qemu_thread_join(&s->thread);
qemu_mutex_lock_iothread();
assert(s->state != MIG_STATE_ACTIVE);
return migrate_fd_close(s);
}
@ -712,13 +716,9 @@ static void *buffered_file_thread(void *opaque)
}
buffered_flush(s);
if (qemu_file_get_error(s->file)) {
qemu_mutex_lock_iothread();
migrate_fd_error(s);
qemu_mutex_unlock_iothread();
migrate_finish_set_state(s, MIG_STATE_ERROR);
} else if (last_round && s->buffer_size == 0) {
qemu_mutex_lock_iothread();
migrate_fd_completed(s);
qemu_mutex_unlock_iothread();
migrate_finish_set_state(s, MIG_STATE_COMPLETED);
}
}
@ -734,6 +734,7 @@ static void *buffered_file_thread(void *opaque)
vm_start();
}
}
qemu_bh_schedule(s->cleanup_bh);
qemu_mutex_unlock_iothread();
g_free(s->buffer);
@ -763,9 +764,10 @@ void migrate_fd_connect(MigrationState *s)
s->xfer_limit = s->bandwidth_limit / XFER_LIMIT_RATIO;
s->cleanup_bh = qemu_bh_new(migrate_fd_cleanup, s);
s->file = qemu_fopen_ops(s, &buffered_file_ops);
qemu_thread_create(&s->thread, buffered_file_thread, s,
QEMU_THREAD_DETACHED);
QEMU_THREAD_JOINABLE);
notifier_list_notify(&migration_state_notifiers, s);
}