[Samba] Missing Files/Missing Folders from an NFS Share

[Conor Armstrong]

Ok, fair enough, but the debug level 9 logs are showing negative offsets.
Can’t explain that other than the signed/unsigned issue.

Maybe this relevant here:
https://lwn.net/Articles/544520/

On Mon, 27 Feb 2023 at 20:07, Jeremy Allison <jra at samba.org> wrote:

> On Mon, Feb 27, 2023 at 08:01:40PM +0100, Conor Armstrong wrote:
> >   I think it has a lot to do with telldir on an NFS share returning a
> cookie
> >   that is supposed to be unique rather than an actual offset. Problem is,
> >   that cookie is stored as a 31bit hash which can then end up as a
> negative
> >   signed offset in Samba which is not handled correctly. The cookies are
> not
> >   necessarily consecutive as you move through a directory.
>
> We only store the returned cookie as a 'long' from telldir(), and then use
> it to get to the same position again via seekdir(). There isn't any
> interpretation of the actual value inside Samba other than 3 'magic'
> values we use #defined here:
>
> /* "Special" directory offsets. */
> #define END_OF_DIRECTORY_OFFSET ((long)-1)
> #define START_OF_DIRECTORY_OFFSET ((long)0)
> #define DOT_DOT_DIRECTORY_OFFSET ((long)0x80000000)
>
> So long as telldir() doesn't return any of these,
> we should work fine. We don't expect the cookies
> to be consecutive or in any order for that matter.
>
> So I would take issue with your statement:
>
> "can then end up as a negative signed offset in Samba which is not handled
> correctly"
>
> :-).
>