Yevgeniy Aleynikov wrote: > As pointed by Ken - we do have alot of file renames (qmail). > But 2-nd solution, directory-only rename serialization, probably won't > affect performance as much. > > But i believe it's not only us who's gonna have problem when exploit > code will be known by everybody sooner or later....
Dan's non-atomicity assumption on renames is incorrect. Even if it's were correct, it's possible to recover fully following a failure, because metadata updates are ordered (there is a real synchronization between dependent operations). I think that a workaround would be to comment the directory fsync() code out of qmail, which apparently thinks it's running on extfs or an async mounted FFS. -- Terry To Unsubscribe: send mail to [EMAIL PROTECTED] with "unsubscribe freebsd-hackers" in the body of the message
