Christoph, On Tue, Apr 15, 2014 at 10:52:28AM -0700, Christoph Hellwig wrote: > So any opinions from other fs / security people on how O_TMPFILE files > should behave for ACL inheritance / labeling? from how O_TMPFILE is documented right now [*], creating such a file and then linking it into the namespace is one of the obvious use cases. The intent seems to be to make it seem like the file was created and populated atomically, possibly with inherited permissions and all. I think this behavior require that the O_TMPFILE file inherits from the directory it was "created" in. Adding code to achieve the effect of create-time inheritance at link time, only for O_TMPFILE files or files without any links, doesn't seem reasonable to me: it would duplicate create code in the link code path, and it would make it harder to override inherited permissions or labels. (Trying to fake inheritance by reimplementing it in user space seems like a much worse idea still.) [*] http://man7.org/linux/man-pages/man2/open.2.html Thanks, Andreas -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
