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same problem on RHEL-7.x
+++ This bug was initially created as a clone of Bug #1401824 +++
Description of problem:
man exports
'''
mountpoint=path
mp This option makes it possible to only export a directory if it has successfully been mounted. If no path is given (e.g. mountpoint or mp) then the export point must also be a mount point. If it isn’t then the export point is not exported.
'''
But We can always export a directory that's not mountpoint, even with -o mp option
[root@bkr-hv01-guest18 ~]# mountpoint /exportdir
/exportdir is not a mountpoint
[root@bkr-hv01-guest18 ~]# exportfs -if -o mp '*:/exportdir'
[root@bkr-hv01-guest18 ~]# echo $?
0
[root@bkr-hv01-guest18 ~]# showmount -e localhost
Export list for localhost:
/exportdir *
[root@bkr-hv01-guest18 ~]# time mount localhost:/exportdir /mnt/nfsmp
Version-Release number of selected component (if applicable):
RHEL-6 RHEL-7
How reproducible:
always
Steps to Reproduce:
1. mkdir /exportdir
2. echo "/exportdir localhost(mp)" >/etc/exports
3. service nfs restart
4. showmount -e localhost
^^^ export success
5. mount localhost:/exportdir /mnt/nfsmp
^^^ hangup here
Actual results:
/exportdir can be always exported successfully
and cause client mount hangup
Expected results:
/exportdir should not be exported, if add mountpoint export option
client mount should exit with an error message to user
Additional info: