I’m working on a system recently migrated to Oracle Linux 6.6 from a very old Solaris system. There is a CIFS mount from a Windows 2012r2 server that existed on the old system. The raw mount point has 777 directory permissions.
[root@localhost ~]# ls -ld /datastore/
drwxrwxrwx 2 root root 4096 Jan 6 09:50 /datastore/
When the mount is active the permissions are:
[root@localhost ~]# ls -ld /datastore/
drwxr-xr-x 1 root root 634564 Jan 6 09:50 /datastore/
Users other than root cannot write to the share or create files. Looking at the old server, the permissions on files and subdirectories within the same share have the setuid bit. This is not present on the new system. The /etc/fstab looks like:
//cifshost/datastore /datastore cifs username=user,password=password,domain=mydomain.local 0 0
You’ll need to change /etc/fstab and add the file_mode=0666,dir_mode=0777 mount options.
//cifshost/share/datastore /datastore cifs user=user,pass=password,file_mode=0666,dir_mode=0777 0 0
And you should be good to go!