cifs: skip tests that need POSIX support for nounix mounts

CIFS/SMB protocol without POSIX extensions doesn't support operations
with symbolic links and advisory byte-range locks from the same process.
Add checks these features and use them in generic tests that require
such operations.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Reviewed-by: Steve French <smfrench@gmail.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>

common/rc

@@ -2428,6 +2428,29 @@ _require_btrfs_fs_feature()
 		_notrun "Feature $feat not supported by the available btrfs version"
 }
 
+_require_test_symlinks()
+{
+	# IRIX UDF does not support symlinks
+	[ "$HOSTOS" = "IRIX" -a "$FSTYP" = 'udf' ] && \
+		_notrun "Require symlinks support"
+	target=`mktemp -p $TEST_DIR`
+	link=`mktemp -p $TEST_DIR -u`
+	ln -s `basename $target` $link
+	if [ "$?" -ne 0 ]; then
+		rm -f $target
+		_notrun "Require symlinks support"
+	fi
+	rm -f $target $link
+}
+
+_require_test_fcntl_advisory_locks()
+{
+	[ "$FSTYP" != "cifs" ] && return 0
+	cat /proc/mounts | grep $TEST_DEV | grep cifs | grep -q "nobrl" && return 0
+	cat /proc/mounts | grep $TEST_DEV | grep cifs | grep -qE "nounix|forcemand" && \
+		_notrun "Require fcntl advisory locks support"
+}
+
 _get_total_inode()
 {
 	if [ -z "$1" ]; then

tests/generic/005

@@ -67,13 +67,9 @@ _touch()
 # real QA test starts here
 _supported_fs generic
 _require_test
+_require_test_symlinks
 
-# IRIX UDF does not support symlinks
-if [ $FSTYP == 'udf' ]; then
-    _supported_os Linux
-else
-    _supported_os Linux IRIX
-fi
+_supported_os Linux IRIX
 
 cd $TEST_DIR
 

tests/generic/023

@@ -45,6 +45,7 @@ _supported_os Linux
 
 _require_test
 _requires_renameat2
+_require_test_symlinks
 
 # real QA test starts here
 

tests/generic/024

@@ -45,6 +45,7 @@ _supported_os Linux
 
 _require_test
 _requires_renameat2
+_require_test_symlinks
 
 rename_dir=$TEST_DIR/$$
 mkdir $rename_dir

tests/generic/025

@@ -45,6 +45,7 @@ _supported_os Linux
 
 _require_test
 _requires_renameat2
+_require_test_symlinks
 
 rename_dir=$TEST_DIR/$$
 mkdir $rename_dir

tests/generic/131

@@ -45,6 +45,7 @@ _cleanup()
 _supported_fs generic
 _supported_os Linux
 _require_test
+_require_test_fcntl_advisory_locks
 
 TESTFILE=$TEST_DIR/lock_file