nfs: Fixes "Remote I/O error" mount failures

- Fixes issue where NFS mount fail with "Remove I/O error" after the
  target directory has been deleted and re-created after the gNFSd has
  already cached the inode of the first generation of the target
  directory.
- The solution is to follow the guidance of the AFR2 comments and
  refresh the inode by deleting it from cache and looking it up
  again.

BUG: 1258196
Change-Id: I9c7d8bd460ee9e5ea0b5b47d23886b1afcdcd563
Reported-by: Richard Wareing <rwareing@fb.com>
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/12046
Tested-by: Gluster Build System <jenkins@build.gluster.com>

1 files changed, 28 insertions, 0 deletions

diff --git a/tests/bugs/bug-1258069.t b/tests/bugs/bug-1258069.t
new file mode 100755
index 00000000000..8df4a8a9e1b
--- /dev/null
+++ b/tests/bugs/bug-1258069.t
@@ -0,0 +1,28 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+. $(dirname $0)/../volume.rc
+. $(dirname $0)/../nfs.rc
+
+cleanup
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 3 $H0:$B0/${V0}{0,1,2}
+TEST $CLI volume set $V0 cluster.choose-local off
+TEST $CLI volume set $V0 nfs.disable off
+TEST $CLI volume set $V0 diagnostics.client-log-level DEBUG
+TEST $CLI volume start $V0
+
+EXPECT_WITHIN $NFS_EXPORT_TIMEOUT "1" is_nfs_export_available
+TEST mount_nfs $H0:/$V0 $N0 nolock
+TEST mkdir -p $N0/a/b/c
+TEST umount_nfs $N0
+TEST glusterfs --volfile-id=/$V0 --volfile-server=$H0 $M0 --attribute-timeout=0 --entry-timeout=0
+rmdir $M0/a/b/c
+mkdir $M0/a/b/c
+TEST mount_nfs $H0:/$V0/a/b/c $N0 nolock
+TEST umount_nfs $N0
+TEST umount $M0
+
+cleanup