> On Jan 14, 2021, at 1:29 PM, Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, Jan 14, 2021 at 10:08 AM bfields@xxxxxxxxxxxx > <bfields@xxxxxxxxxxxx> wrote: >> >> I dug around a bit and couldn't find the idea of using filehandle >> guessing plus mountd's following of symlinks to get access to other >> filesystems. That's kind of interesting. > > [ Other people removed from cc, this is just a question about nfsd cleanliness ] > > I missed if Trond's suggestion to at least fix up ".." to have the > same filehandle as "." for the top export directory was done. If I understand your question correctly... there is a commit in linux-next that simply doesn't return any filehandle for ".." in the root directory. https://git.kernel.org/pub/scm/linux/kernel/git/cel/linux.git/commit/?h=for-next&id=51b2ee7d006a736a9126e8111d1f24e4fd0afaa6 I intend to send you a PR after a few more days of soak time, unless you'd like me to send it now. -- Chuck Lever
