On Thu 03 Jun 2021 at 09:12:52 -0000, Michael van Elst wrote: > What happens: > > namei() return EEXIST when it works on a CREATE operation and > crosses a mountpoint. > > procfs cheats in that the directory nodes like /proc/$pid/fd are > served by procfs and have a v_mount pointing to /proc. But the > file descriptors /proc/$pid/fd/$fd are magic aliases and you get > the real vnode of that open file which belongs to a different > mount, e.g. /dev/pts for a pty or a ffs filesystem for a regular file. > > For namei() that's crossing a mountpoint -> EEXIST.
I guess the question for the short term is: will it work as intended when the O_CREAT flag is omitted from the call (since it is redundant in this case anyway)? -Olaf. -- ___ Q: "What's an anagram of Banach-Tarski?" -- Olaf "Rhialto" Seibert \X/ A: "Banach-Tarski Banach-Tarski." -- rhialto at falu dot nl
signature.asc
Description: PGP signature
