rpc: bring in root-squashing behavior in rpc

* requests coming in as root are converted to nfsnobody

* with open-behind some acl checks wont happen and nfsnobody
  can read the file "whose owner is root and other users do not
  have permission to read the file". This is becasue open-behind
  does not send the open to the brick and sends success to the
  application, thus the acl related tests on the file wont happen
  which would have prevented the file from being opened.

Change-Id: I73afbfd904f0beb3a2ebe807b938ac2fecd4976b
BUG: 887145
Signed-off-by: Raghavendra Bhat <raghavendra@redhat.com>
Reviewed-on: http://review.gluster.org/4516
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>

1 files changed, 85 insertions, 0 deletions

diff --git a/tests/bugs/bug-887145.t b/tests/bugs/bug-887145.t
new file mode 100755
index 00000000000..8e5f039006c
--- /dev/null
+++ b/tests/bugs/bug-887145.t
@@ -0,0 +1,85 @@
+#!/bin/bash
+
+. $(dirname $0)/../include.rc
+
+cleanup;
+
+TEST glusterd
+TEST pidof glusterd
+TEST $CLI volume create $V0 replica 2 $H0:$B0/${V0}{1,2};
+TEST $CLI volume set $V0 performance.open-behind off;
+TEST $CLI volume start $V0
+
+sleep 2;
+## Mount FUSE with caching disabled
+TEST glusterfs --entry-timeout=0 --attribute-timeout=0 -s $H0 --volfile-id $V0 $M0;
+
+sleep 2;
+
+TEST mount -t nfs -o vers=3,nolock $H0:/$V0 $N0;
+
+useradd tmp_user 2>/dev/null 1>/dev/null;
+mkdir $M0/dir;
+mkdir $M0/other;
+cp /etc/passwd $M0/;
+cp $M0/passwd $M0/file;
+chmod 600 $M0/file;
+
+chown -R nfsnobody:nfsnobody $M0/dir;
+chown -R tmp_user:tmp_user $M0/other;
+
+TEST $CLI volume set $V0 server.root-squash on;
+
+sleep 2;
+
+# create files and directories in the root of the glusterfs and nfs mount
+# which is owned by root and hence the right behavior is getting EACCESS
+# as the fops are executed as nfsnobody.
+touch $M0/foo 2>/dev/null;
+TEST [ $? -ne 0 ]
+touch $N0/foo 2>/dev/null;
+TEST [ $? -ne 0 ]
+mkdir $M0/new 2>/dev/null;
+TEST [ $? -ne 0 ]
+mkdir $N0/new 2>/dev/null;
+TEST [ $? -ne 0 ]
+cp $M0/file $M0/tmp_file 2>/dev/null;
+TEST [ $? -ne 0 ]
+cp $N0/file $N0/tmp_file 2>/dev/null;
+TEST [ $? -ne 0 ]
+cat $M0/file 2>/dev/null;
+TEST [ $? -ne 0 ]
+# here read should be allowed because eventhough file "passwd" is owned
+# by root, the permissions if the file allow other users to read it.
+cat $M0/passwd 1>/dev/null;
+TEST [ $? -eq 0 ]
+cat $N0/passwd 1>/dev/null;
+TEST [ $? -eq 0 ]
+
+# create files and directories should succeed as the fops are being executed
+# inside the directory owned by nfsnobody
+TEST touch $M0/dir/file;
+TEST touch $N0/dir/foo;
+TEST mkdir $M0/dir/new;
+TEST mkdir $N0/dir/other;
+TEST rm -f $M0/dir/file $M0/dir/foo;
+TEST rmdir $N0/dir/*;
+
+# create files and directories here should fail as other directory is owned
+# by tmp_user.
+touch $M0/other/foo 2>/dev/null;
+TEST [ $? -ne 0 ]
+touch $N0/other/foo 2>/dev/null;
+TEST [ $? -ne 0 ]
+mkdir $M0/other/new 2>/dev/null;
+TEST [ $? -ne 0 ]
+mkdir $N0/other/new 2>/dev/null;
+TEST [ $? -ne 0 ]
+
+userdel tmp_user;
+rm -rf /home/tmp_user;
+
+TEST $CLI volume stop $V0;
+TEST $CLI volume delete $V0;
+
+cleanup;