nfs: a unix-domain-socket should not be created as fifo

Cherry picked from commit 381afd4f480533f212e1f62a0ccfd9dcf7248e17:
> Change-Id: Ic6a23165df1703b330636a059967c3c674dbde57
> BUG: 1235231
> Signed-off-by: Niels de Vos <ndevos@redhat.com>
> Reviewed-on: http://review.gluster.org/11355
> Tested-by: NetBSD Build System <jenkins@build.gluster.org>
> Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>
> Tested-by: Gluster Build System <jenkins@build.gluster.com>

Change-Id: Ic6a23165df1703b330636a059967c3c674dbde57
BUG: 1244118
Signed-off-by: Niels de Vos <ndevos@redhat.com>
Reviewed-on: http://review.gluster.org/11710
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaleb KEITHLEY <kkeithle@redhat.com>

3 files changed, 63 insertions, 7 deletions

diff --git a/tests/bugs/nfs/socket-as-fifo.py b/tests/bugs/nfs/socket-as-fifo.py
new file mode 100755
index 00000000000..1fce5b96896
--- /dev/null
+++ b/tests/bugs/nfs/socket-as-fifo.py
@@ -0,0 +1,33 @@
+#!/usr/bin/env python
+#
+# Create a unix domain socket and test if it is a socket (and not a fifo/pipe).
+#
+# Author: Niels de Vos <ndevos@redhat.com>
+#
+
+import os
+import stat
+import sys
+import socket
+
+ret = 1
+
+if len(sys.argv) != 2:
+        print 'Usage: %s <socket>' % (sys.argv[0])
+        sys.exit(ret)
+
+path = sys.argv[1]
+
+sock = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
+sock.bind(path)
+
+stbuf = os.stat(path)
+mode = stbuf.st_mode
+
+if stat.S_ISSOCK(mode):
+        ret = 0
+
+sock.close()
+os.unlink(path)
+
+sys.exit(ret)
diff --git a/tests/bugs/nfs/socket-as-fifo.t b/tests/bugs/nfs/socket-as-fifo.t
new file mode 100644
index 00000000000..94a800a2ceb
--- /dev/null
+++ b/tests/bugs/nfs/socket-as-fifo.t
@@ -0,0 +1,22 @@
+#!/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 $H0:$B0/$V0
+TEST $CLI volume start $V0
+EXPECT_WITHIN $NFS_EXPORT_TIMEOUT "1" is_nfs_export_available;
+TEST mount_nfs $H0:/$V0 $N0 nolock
+
+# this is the actual test
+TEST $(dirname $0)/socket-as-fifo.py $N0/not-a-fifo.socket
+
+TEST umount_nfs $N0
+
+cleanup
diff --git a/xlators/nfs/server/src/nfs3.c b/xlators/nfs/server/src/nfs3.c
index 0fea135c784..22f2345a419 100644
--- a/xlators/nfs/server/src/nfs3.c
+++ b/xlators/nfs/server/src/nfs3.c
@@ -3030,7 +3030,7 @@ rpcerr:
 }
 
 
-int
+static int
 nfs3_mknod_reply (rpcsvc_request_t *req, nfsstat3 stat, struct nfs3_fh *fh,
                   struct iatt *buf, struct iatt *preparent,
                   struct iatt *postparent)
@@ -3126,7 +3126,7 @@ nfs3err:
 }
 
 
-int
+static int
 nfs3_mknod_device (nfs3_call_state_t *cs)
 {
         int                             ret = -EFAULT;
@@ -3157,12 +3157,11 @@ nfs3_mknod_device (nfs3_call_state_t *cs)
 }
 
 
-int
-nfs3_mknod_fifo (nfs3_call_state_t *cs)
+static int
+nfs3_mknod_fifo (nfs3_call_state_t *cs, mode_t mode)
 {
         int                             ret = -EFAULT;
         nfs_user_t                      nfu = {0, };
-        mode_t                          mode = S_IFIFO;
 
         if (!cs)
                 return ret;
@@ -3181,7 +3180,7 @@ nfs3_mknod_fifo (nfs3_call_state_t *cs)
 }
 
 
-int
+static int
 nfs3_mknod_resume (void *carg)
 {
         nfsstat3                        stat = NFS3ERR_SERVERFAULT;
@@ -3200,8 +3199,10 @@ nfs3_mknod_resume (void *carg)
                 ret = nfs3_mknod_device (cs);
                 break;
         case NF3SOCK:
+                ret = nfs3_mknod_fifo (cs, S_IFSOCK);
+                break;
         case NF3FIFO:
-                ret = nfs3_mknod_fifo (cs);
+                ret = nfs3_mknod_fifo (cs, S_IFIFO);
                 break;
         default:
                 ret = -EBADF;