nfs: resolve parent inode during inode_loc_fill

This commit resolves the parent inode in nfs_inode_loc_fill
if the inode has a resolved path.

Change-Id: If407c91c246b0b9f3349cedae0baec8bd6831d10
BUG: 872923
Signed-off-by: Rajesh Amaravathi <rajesh@redhat.com>
Reviewed-on: http://review.gluster.org/4157
Reviewed-by: Krishna Srinivas <krishna.zresearch@gmail.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>

tests/bugs/bug-872923.t

@@ -0,0 +1,57 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume info
+TEST $CLI volume create $V0 replica 2 $H0:$B0/brick0 $H0:$B0/brick1
+TEST $CLI volume start $V0
+sleep 5
+
+mount -t nfs -o vers=3,nolock `hostname`:/$V0 $N0
+
+cd $N0
+mkdir test_hardlink_self_heal;
+cd test_hardlink_self_heal;
+
+for i in `seq 1 5`;
+do
+    mkdir dir.$i;
+    for j in `seq 1 10`;
+    do
+        dd if=/dev/zero of=dir.$i/file.$j bs=1k count=$j > /dev/null 2>&1;
+    done;
+done;
+
+cd ..
+kill  `cat /var/lib/glusterd/vols/$V0/run/$H0-d-backends-brick0.pid`
+sleep 2
+
+
+cd test_hardlink_self_heal;
+
+RET=0
+for i in `seq 1 5`;
+do
+    for j in `seq 1 10`;
+    do
+        ln dir.$i/file.$j dir.$i/link_file.$j > /dev/null 2>&1;
+        RET=$?
+        if [ $RET -ne 0 ]; then
+           break;
+        fi
+    done ;
+    if [ $RET -ne 0 ]; then
+        break;
+    fi
+done;
+
+cd
+umount $N0
+
+EXPECT "0" echo $RET;
+
+cleanup;

xlators/nfs/server/src/nfs-common.c

@@ -221,6 +221,8 @@ nfs_inode_loc_fill (inode_t *inode, loc_t *loc, int how)
                 snprintf (tmp_path, sizeof (tmp_path), "<gfid:%s>",
                           uuid_utoa (loc->gfid));
                 resolvedpath = gf_strdup (tmp_path);
+        } else {
+                parent = inode_parent (inode, loc->pargfid, NULL);
         }
 
         ret = nfs_loc_fill (loc, inode, parent, resolvedpath);