samba - Jun 2024 - missing msdfs referrals from samba directory listing: wrong order in smbd_dirptr_get_entry()?

06.06.2024 19:33, Michael Tokarev via samba wrote:
> For quite some time I'm trying to find what's going on with MSDFS
referrals.
> Samba version is 4.19.6.
..
> However, when opening the directory in question from client, this name is
not
> shown in the listing.? Samba skips this name from the listing when looping
over
> readdir entries:
So, the same config just works in samba-4.20.  There has been a quite few
changes in
this area in 4.20, but the order of checks in smbd_dirptr_get_entry() didn't
actually
change (but the code is different), -- looks like the change happened in
smbd_dirptr_get_entry
itself.

msdfs is broken in 4.19.  It worked fine in 4.18.

Is no one using msdfs?  I wonder why I was the first to discover this?

Thanks,

/mjt
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On Fri, Jun 07, 2024 at 07:16:06AM +0300, Michael Tokarev via samba
wrote:
>06.06.2024 19:33, Michael Tokarev via samba wrote:
>
>>For quite some time I'm trying to find what's going on with
MSDFS referrals.
>>Samba version is 4.19.6.
>..
>>However, when opening the directory in question from client, this name
is not
>>shown in the listing.? Samba skips this name from the listing when
looping over
>>readdir entries:
>
>So, the same config just works in samba-4.20.  There has been a quite few
changes in
>this area in 4.20, but the order of checks in smbd_dirptr_get_entry()
didn't actually
>change (but the code is different), -- looks like the change happened in
smbd_dirptr_get_entry
>itself.
>
>msdfs is broken in 4.19.  It worked fine in 4.18.
>
>Is no one using msdfs?  I wonder why I was the first to discover this?
There must not be a test for your specific use-case.

MSDFS is tested in the autobuild test suite. Can
you articulate the problem well enough we can
build a regression test for it, and then we
can ensure it never gets broken for this case
again.

Sorry for the trouble.

Jeremy.