SMB3 POSIX and deleting files with FILE_ATTRIBUTE_READONLY

[Steve French]

Looks fine to me

On Mon, Apr 14, 2025 at 2:03 PM Ralph Boehme <slow at samba.org> wrote:
>
> As discussed at SambaXP, what about this?
>
> https://gitlab.com/samba-team/smb3-posix-spec/-/merge_requests/6/diffs
>
> On 4/9/25 8:18 PM, Ralph Boehme via samba-technical wrote:
> > Hi folks,
> >
> > what should be the behavior with SMB3 POSIX when a POSIX client tries to
> > delete a file that has FILE_ATTRIBUTE_READONLY set?
> >
> > The major question that we must answer is, if this we would want to
> > allow for POSIX clients to ignore this in some way: either completely
> > ignore it on POSIX handles or first check if the handle has requested
> > and been granted WRITE_ATTRIBUTES access.
> >
> > Checking WRITE_ATTRIBUTES first means we would correctly honor
> > permissions and the client could have removed FILE_ATTRIBUTE_READONLY
> > anyway to then remove the file.
> >
> > Windows has some new bits FILE_DISPOSITION_IGNORE_READONLY_ATTRIBUTE to
> > handle this locally (!) and it seems to be doing it without checking
> > WRITE_ATTRIBUTES on the server.
> >
> > <https://learn.microsoft.com/en-us/openspecs/windows_protocols/ms-
> > fscc/2e860264-018a-47b3-8555-565a13b35a45>
> >
> > Thoughts?
> >
> > Thanks!
> > -slow
>


-- 
Thanks,

Steve