[lustre-discuss] Nodemap and setreuid/setregid
Sebastien Buisson
sbuisson at ddn.com
Thu Feb 6 09:19:42 PST 2020
Hi,
I am not able to reproduce your issue. I compiled your C program, in all cases I am not getting Permission Denied.
You say that it works when you deactivate the nodemap. But given that you have a fileset on your nodemap entry « sif », when you deactivate it you might end up doing IOs in a different directory. So you might compare different things.
Also, does the uid/gid 20501 exist on server side?
Cheers,
Sebastien.
> Le 6 févr. 2020 à 14:29, Hans Henrik Happe <happe at nbi.dk> a écrit :
>
> Hi,
>
> Thanks for a very quick reply :-) Here are the map:
>
> # lctl get_param nodemap.sif.*
> nodemap.sif.admin_nodemap=1
> nodemap.sif.audit_mode=1
> nodemap.sif.deny_unknown=0
> nodemap.sif.exports=
> [
> { nid: 172.25.10.51 at tcp, uuid: 56bb9b04-9bb5-d7b5-3f50-d62804690db1 },
> ]
> nodemap.sif.fileset=/sif
> nodemap.sif.id=2
> nodemap.sif.idmap=
> [
> { idtype: uid, client_id: 501, fs_id: 20501 },
> { idtype: gid, client_id: 501, fs_id: 20501 }
> ]
> nodemap.sif.map_mode=both
> nodemap.sif.ranges=
> [
> { id: 11, start_nid: 172.25.1.28 at tcp, end_nid: 172.25.1.28 at tcp },
> { id: 10, start_nid: 172.25.1.27 at tcp, end_nid: 172.25.1.27 at tcp },
> { id: 9, start_nid: 172.25.10.51 at tcp, end_nid: 172.25.10.51 at tcp }
> ]
> nodemap.sif.sepol=
>
> nodemap.sif.squash_gid=20000
> nodemap.sif.squash_uid=20000
> nodemap.sif.trusted_nodemap=0
>
> Cheers,
> Hans Henrik
>
> On 06.02.2020 14.17, Sebastien Buisson wrote:
>> Hi,
>>
>> It might be due to a property on the nodemap you defined.
>> Could you please dump your nodemap definition?
>>
>> Thanks,
>> Sebastien.
>>
>>
>>> Le 6 févr. 2020 à 14:14, Hans Henrik Happe <happe at nbi.dk>
>>> a écrit :
>>>
>>> Hi,
>>>
>>> Has anyone had success with gocryptfs 1.7.x on top of a Lustre nodemap?
>>>
>>> I've tested with Lustre 2.12.3.
>>>
>>> I found that gocryptfs 1.6 worked. However, with 1.7.x I got a lot of
>>> "Permission denied". I tried all permutations of trusted and admin on
>>> the nodemap.
>>>
>>> By stracing a bit, I've created a small peace of code provoking the issue:
>>>
>>> ---
>>>
>>> #include <unistd.h>
>>> #include <sys/types.h>
>>> #include <fcntl.h>
>>> #include <stdio.h>
>>>
>>> int main() {
>>> int r;
>>>
>>> setregid(-1, 501);
>>> setreuid(-1, 501);
>>>
>>> r = open("foo", O_CREAT, S_IRWXU);
>>> if (r < 0) {
>>> perror("open");
>>> }
>>> return 0;
>>> }
>>>
>>> ---
>>>
>>>
>>>
>>> When run as root in a directory owned by uid=501 and gid=501 in a
>>> nodemap based Lustre fs it returns:
>>>
>>> open: Permission denied
>>>
>>> Works when I deactivate nodemap (lctl nodemap_activate 0) or just use a
>>> plain local fs.
>>>
>>> I don't think this is intended behavior for nodemaps, but I might be wrong.
>>>
>>> Cheers,
>>> Hans Henrik
>>> _______________________________________________
>>> lustre-discuss mailing list
>>>
>>> lustre-discuss at lists.lustre.org
>>> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
>
> _______________________________________________
> lustre-discuss mailing list
> lustre-discuss at lists.lustre.org
> http://lists.lustre.org/listinfo.cgi/lustre-discuss-lustre.org
More information about the lustre-discuss
mailing list