FWIW, I've folded that pile into vfs.git#work.autofs. Problems: * (fixed) __path_is_mountpoint() should _not_ treat NULL from __lookup_mnt() as "nothing's mounted there" until it has checked that mount_lock hadn't been touched - mount --move on something unrelated can race with lockless hash lookup and lead to false negatives. * linux/mount.h might be the wrong place for path_is_mountpoint(). Or it shouldn't be inlined. I don't like the includes you've added there. * path_has_submounts() is broken. At the very least, it's AB-BA between mount_lock and rename_lock. I would suggest trying to put read_seqlock_excl(&mount_lock) around the call of d_walk() in there, and using __lookup_mnt() in the callback (without retries on the mount_lock, of course - read_seqlock_excl done on the outside is enough). I'm not sure if it won't cause trouble with contention, though; that needs testing. As it is, that function is broken in #work.autofs, same as it is in -mm and -next. * the last one (propagation-related) is too ugly to live - at the very least, its pieces should live in fs/pnode.c; exposing propagate_next() is simply wrong. I hadn't picked that one at all, and I would suggest coordinating anything in that area with ebiederman - he has some work around fs/pnode.c and you risk stepping on his toes. -- To unsubscribe from this list: send the line "unsubscribe autofs" in
