On Thu, 15 Apr 2010, Giulio Ferro wrote:
Here's the setup:
server : NFS server machine (fb 8 stable amd64 )
client : NFS client machine (as above)
server and client are both sharing the same permission database through ldap:
Both have in /etc/nsswitch.conf
...
group: files ldap
...
passwd: files ldap
This issue isn't related to ldap, however. I get the same result if I
manually add
groups to /etc/group file (read on)
Let's suppose I have user "giulio" configured in my system.
giulio is also part (-G) of groups:
group1, group2, group3, ... , group10
server is exporting the directory
/path/to/root (on zfs)
the directory
/path/to/root/dir/etc/subdir1
has permission 770 and group ownership "group3"
I login as user "giulio" on server I can enter "subdir1" directory, since I'm
member of group "group3"
I then login as user "giulio" on client, and I can do the same (as expected).
When groups are more than a few, however, I get this strange behavior:
let's suppose the directory:
/path/to/root/dir/etc/subdir2
has permission 770 and group ownership "group10"
What happens is that I can access "subdir2" on the server machine when I
login as "giulio", but when I try to access that same dir on the client
machine
I get:
$ cd /path/to/root/dir/etc
(ok)
$ cd subdir2
subdir2/: Permission denied.
Yes, it should work. I just tried the same thing with a server running
UFS/FFS and it worked fine, so I think that the problem might be ZFS
related. (You will get into trouble with more than 16 groups, since
that is all that AUTH_SYS for Sun RPC handles, but I did 10 like your
example and it worked ok for me, using FreeBSD-CURRENT client/server,
except that my server uses UFS/FFS.)
Hopefully someone with ZFS expertise can help out here?
If you can conveniently do the same test using a server that exports
a UFS/FFS file system, that would be helpful w.r.t. isolating the
problem.
rick
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