On 2024-11-14 14:48:16 [+0100], Michal Koutný wrote:
> On Tue, Nov 12, 2024 at 04:52:38PM GMT, Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx> wrote:
> > --- a/include/linux/kernfs.h
> > +++ b/include/linux/kernfs.h
> > @@ -147,6 +147,11 @@ enum kernfs_root_flag {
> > * Support user xattrs to be written to nodes rooted at this root.
> > */
> > KERNFS_ROOT_SUPPORT_USER_XATTR = 0x0008,
> > +
> > + /*
> > + * Renames must not change the parent node.
> > + */
> > + KERNFS_ROOT_SAME_PARENT = 0x0010,
>
> FTR, cgroup v2 doesn't even define renames and the full rename
> (different parent) is only used by resctrl filesystem AFAICS.
> I'm only mentioning it in the case you wanted to replace the flag with
> two different rename methods in kernfs_syscall_ops.
Thanks. I think I have enough clues for a v3 now. I wanted to do
something today but didn't manage it yet.
> Thanks for fixing this locking situation in general,
> Michal
Sebastian
