From 84ec65520bbcc249b50ba9ab3c2c29fcc4ea95b0 Mon Sep 17 00:00:00 2001 From: Jan Kiszka Date: Fri, 5 Aug 2011 09:11:26 +0200 Subject: [PATCH] Reorganize and fix monitor resume after migration If migration failed in migrate_fd_put_buffer, the monitor may have been resumed not only in the error path of that function but also once again in migrate_fd_put_ready which is called unconditionally by migrate_fd_connect. Fix this by establishing a cleaner policy: the monitor shall be resumed when the migration file is closed, either via callback (migrate_fd_close) or in migrate_fd_cleanup if no file is open (i.e. no callback invoked). Reported-By: Michael Tokarev Tested-By: Michael Tokarev Signed-off-by: Jan Kiszka Signed-off-by: Anthony Liguori --- migration.c | 19 +++++++++---------- 1 file changed, 9 insertions(+), 10 deletions(-) diff --git a/migration.c b/migration.c index 2a15b98db9..756fa6261f 100644 --- a/migration.c +++ b/migration.c @@ -292,18 +292,17 @@ int migrate_fd_cleanup(FdMigrationState *s) ret = -1; } s->file = NULL; + } else { + if (s->mon) { + monitor_resume(s->mon); + } } - if (s->fd != -1) + if (s->fd != -1) { close(s->fd); - - /* Don't resume monitor until we've flushed all of the buffers */ - if (s->mon) { - monitor_resume(s->mon); + s->fd = -1; } - s->fd = -1; - return ret; } @@ -330,9 +329,6 @@ ssize_t migrate_fd_put_buffer(void *opaque, const void *data, size_t size) if (ret == -EAGAIN) { qemu_set_fd_handler2(s->fd, NULL, NULL, migrate_fd_put_notify, s); } else if (ret < 0) { - if (s->mon) { - monitor_resume(s->mon); - } s->state = MIG_STATE_ERROR; notifier_list_notify(&migration_state_notifiers, NULL); } @@ -458,6 +454,9 @@ int migrate_fd_close(void *opaque) { FdMigrationState *s = opaque; + if (s->mon) { + monitor_resume(s->mon); + } qemu_set_fd_handler2(s->fd, NULL, NULL, NULL, NULL); return s->close(s); } -- GitLab