[Samba] error when trying to copy file from samba share to old Windows CE share

[Jeremy Allison]

On Thu, Jun 20, 2019 at 10:09:08AM -0400, Dan Arena wrote:
> On Wed, Jun 19, 2019 at 3:41 PM Jeremy Allison <jra at samba.org> wrote:
> > Weren't you getting a NT_STATUS_NOT_IMPLEMENTED level
> > error return ?
> >
> > Look for the specific error return you see on the WinCE
> > client in the trace.
> 
> Figured out the issue...
> 
> After comparing a good vs bad file copy in wireshark for a while, I
> have found where it goes wrong. On the good copy I see an "NT Create
> AndX Request" with a response that says it created the file. On the
> bad copy it instead does a "NT Trans Request, NT CREATE" with an
> additional "NT CREATE data" that has the SELinux context in it.
> Comparing the old vs new smb.conf man page it looks like "ea support"
> in the older samba version was default to no, while it is default to
> yes in the newer samba version. Windows is some how storing those
> extended attributes, and fails when trying to transfer a file with the
> selinux extended attribute.
> 
> Setting "ea support = no" fixed the issue.

Interesting. Where did it get the SeLinux context EA from ?

Aren't they in the "system." namespace ?

We filter these out on listing EA's on a file inside

get_ea_list_from_file_path() by the following code:

               if (strnequal(names[i], "system.", 7)
                    || samba_private_attr_name(names[i]))
                        continue;