nfs: test nfs4_getfacl near page size ACL from server

Test nfs4_getfacl gets ACL list correctly from server when the ACL
length is close enough to the end of a page. On buggy NFS client
getxattr could return ERANGE. Upstream commit ed92d8c137b7 ("NFSv4:
fix getacl ERANGE for some ACL buffer sizes") fixed this bug in 4.11
kernel.

Note that this reproducer was originally written by J. Bruce Fields.

Cc: J. Bruce Fields <bfields@redhat.com>
Cc: Weston Andros Adamson <dros@primarydata.com>
Cc: linux-nfs@vger.kernel.org
Reviewed-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Eryu Guan <eguan@redhat.com>

common/config

@@ -197,6 +197,8 @@ export FLOCK_PROG="`set_prog_path flock`"
 export LDD_PROG="`set_prog_path ldd`"
 export TIMEOUT_PROG="`set_prog_path timeout`"
 export MAN_PROG="`set_prog_path man`"
+export NFS4_SETFACL_PROG="`set_prog_path nfs4_setfacl`"
+export NFS4_GETFACL_PROG="`set_prog_path nfs4_getfacl`"
 
 # use 'udevadm settle' or 'udevsettle' to wait for lv to be settled.
 # newer systems have udevadm command but older systems like RHEL5 don't.

common/nfs

@@ -0,0 +1,35 @@
+#
+# NFS specific common functions.
+#
+
+# given an NFS export and a NFS version number, return 0 if
+# the mounted NFS is the given version. e.g.
+# _is_nfs_version $SCRATCH_DEV 4.2
+_is_nfs_version()
+{
+	local nfs_exp=$1
+	local nfs_ver=$2
+	_fs_options $1 | grep -q "vers=$2"
+}
+
+# require $TEST_DEV mounted as a given NFS version
+# e.g. _require_test_nfs_version 4.2
+_require_test_nfs_version()
+{
+	_require_test
+	if ! _is_nfs_version $TEST_DEV $1; then
+		_notrun "Test requires \$TEST_DEV mounted as NFSv$1"
+	fi
+}
+
+# require $SCRATCH_DEV mounted as a given NFS version
+# e.g. _require_scratch_nfs_version 4
+_require_scratch_nfs_version()
+{
+	_require_scratch
+	_scratch_mount
+	if ! _is_nfs_version $SCRATCH_DEV $1; then
+		_notrun "Test requires \$SCRATCH_DEV mounted as NFSv$1"
+	fi
+	_scratch_unmount
+}

common/rc

@@ -162,6 +162,7 @@ case "$FSTYP" in
 	 [ "$MKFS_F2FS_PROG" = "" ] && _fatal "mkfs.f2fs not found"
 	 ;;
     nfs)
+	 . ./common/nfs
 	 ;;
     cifs)
 	 ;;

tests/nfs/001

@@ -0,0 +1,77 @@
+#! /bin/bash
+# FS QA Test 001
+#
+# Test nfs4_getfacl gets ACL list correctly from server when the ACL length is
+# close enough to the end of a page. On buggy NFS client getxattr could return
+# ERANGE. Upstream commit ed92d8c137b7 ("NFSv4: fix getacl ERANGE for some ACL
+# buffer sizes") fixed this bug.
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2017 Red Hat Inc., All Rights Reserved.
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it would be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program; if not, write the Free Software Foundation,
+# Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+#-----------------------------------------------------------------------
+#
+
+seq=`basename $0`
+seqres=$RESULT_DIR/$seq
+echo "QA output created by $seq"
+
+here=`pwd`
+tmp=/tmp/$$
+status=1	# failure is the default!
+trap "_cleanup; exit \$status" 0 1 2 3 15
+
+_cleanup()
+{
+	cd /
+	rm -f $tmp.* $acltest.*
+}
+
+# get standard environment, filters and checks
+. ./common/rc
+. ./common/filter
+
+# remove previous $seqres.full before test
+rm -f $seqres.full
+
+# real QA test starts here
+_supported_fs nfs
+_supported_os Linux
+_require_test_nfs_version 4
+_require_command $NFS4_SETFACL_PROG "nfs4_setfacl"
+_require_command $NFS4_GETFACL_PROG "nfs4_getfacl"
+
+acltest=$TEST_DIR/acltest.$seq
+rm -f $acltest.*
+touch $acltest.file $acltest.list
+
+# Setup a carefully made ACE list to make attr buffer length is close enough to
+# PAGE_SIZE (size is 4088 in this case, and this only works for 4k page size)
+# that leaves too little room for adding extra attr bitmap in this page
+echo "A::OWNER@:RW" >$acltest.list
+for ((i=9802; i < 10002; i++)); do echo "A::$i:RW" >>$acltest.list; done
+echo "A::GROUP@:RW" >>$acltest.list
+echo "A::EVERYONE@:RW" >>$acltest.list
+
+# Save ACL to testfile
+$NFS4_SETFACL_PROG -S $acltest.list $acltest.file
+
+# Dump ACL, expect correct number of ACE entries
+$NFS4_GETFACL_PROG $acltest.file >>$seqres.full 2>&1
+$NFS4_GETFACL_PROG $acltest.file | wc -l
+
+# success, all done
+status=0
+exit

tests/nfs/001.out

@@ -0,0 +1,2 @@
+QA output created by 001
+203

tests/nfs/Makefile

@@ -0,0 +1,20 @@
+#
+# Copyright (c) 2017 Red Hat, Inc.  All Rights Reserved.
+#
+
+TOPDIR = ../..
+include $(TOPDIR)/include/builddefs
+
+NFS_DIR = nfs
+TARGET_DIR = $(PKG_LIB_DIR)/$(TESTS_DIR)/$(NFS_DIR)
+
+include $(BUILDRULES)
+
+install:
+	$(INSTALL) -m 755 -d $(TARGET_DIR)
+	$(INSTALL) -m 755 $(TESTS) $(TARGET_DIR)
+	$(INSTALL) -m 644 group $(TARGET_DIR)
+	$(INSTALL) -m 644 $(OUTFILES) $(TARGET_DIR)
+
+# Nothing.
+install-dev install-lib:

tests/nfs/group

@@ -0,0 +1,6 @@
+# QA groups control file
+# Defines test groups and nominal group owners
+# - do not start group names with a digit
+# - comment line before each group is "new" description
+#
+001 auto quick nfs4_acl acl