lkml.org 
[lkml]   [2015]   [Sep]   [21]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [RFC v7 15/41] richacl: Automatic Inheritance
On Mon, Sep 21, 2015 at 11:19:59PM +0200, Andreas Gruenbacher wrote:
> 2015-09-18 20:40 GMT+02:00 J. Bruce Fields <bfields@fieldses.org>:
> > On Sat, Sep 05, 2015 at 12:27:10PM +0200, Andreas Gruenbacher wrote:
> >> Automatic Inheritance (AI) allows changes to the acl of a directory to
> > In the above "file" sometimes means "any object" and somethings "a
> > non-directory". I can sort it out, but more consistent terminology
> > would help.
>
> Okay, I'll fix it.
>
> >> Linux does not have a way of creating files without setting the file
> >> permission bits, so all files created inside a directory with
> >> RICHACL_AUTO_INHERIT set will have the RICHACL_PROTECTED flag set. This
> >> effectively disables Automatic Inheritance.
> >>
> >> Protocols which support creating files without specifying permissions
> >> can explicitly clear the RICHACL_PROTECTED flag after creating a file
> >> and reset the file masks to "undo" applying the create mode; see
> >> richacl_compute_max_masks(). They should set the RICHACL_DEFAULTED
> >> flag. This is a workaround; a mechanism that would allow a process to
> >> indicate to the kernel to ignore the create mode when there are
> >> inherited permissions would fix this problem.
> >
> > Also, as you know: current nfsd has no way to create files without
> > setting permissions. And if we were to implement that it's unclear how
> > many clients would actually use it (Windows clients are rare). And of
> > course Samba doesn't have the interfaces it would need.
> >
> > I think we should just drop this for now. The rest of the richacl stuff
> > is still useful without it.
>
> Samba will hack around it and adjust the ACL after the create; that's
> still better than not having Automatic Inheritance. Windows uses AI
> all the time so AI is more important for Samba than for NFSv4.

Oh, OK, that makes sense. Even just giving them a place to store the
bits would be better than nothing. So, ignore my objection there....

--b.


\
 
 \ /
  Last update: 2015-09-22 04:01    [W:0.127 / U:0.796 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site