+++ This bug was initially created as a clone of Bug #164186 +++
Description of problem:
exportfs, when re-exporting filesystems, instead unexports them.
Version-Release number of selected component (if applicable):
Steps to Reproduce:
1) On server added the folowing to file /etc/exports :
2) On server restart nfs :
# service nfs restart
3) On client mount/unmount (WORKS) :
# mount server123.redhat.com:/tmp /mnt/tmp
# umount /tmp/mnt
4) On server re-export /tmp :
# exportfs -rv
unexporting client123.redhat.com:/tmp from kerne
/tmp is not exported in the kernel, and subsequent attempts to mount the file
system from a client result in getfh: permission denied messages on the client
and from rpc.mountd on the server
filesystem should continue to be mount-able.
I'm attaching my patch to correct this. It appears when re-exporting, the
rebuild of the export database in xtab_read, when reading /proc/fs/nfs/exports,
fails to set the m_mayexport flag, as it does when reading /var/lib/nfs/xtab.
The result is that exportfs interprets this as a indicator to explicitly
unexport the mount. The attached patch corrects this, and has been successfully
tested by the customer
An advisory has been issued which should help the problem
described in this bug report. This report is therefore being
closed with a resolution of ERRATA. For more information
on the solution and/or where to find the updated files,
please follow the link below. You may reopen this bug report
if the solution does not work for you.