Add a set of basic helper functions to simplify the testing of
casefolding capable filesystems.
Signed-off-by: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
---
common/casefold | 108 ++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 108 insertions(+)
create mode 100644 common/casefold
diff --git a/common/casefold b/common/casefold
new file mode 100644
index 000000000000..34c1d4ae1af1
--- /dev/null
+++ b/common/casefold
@@ -0,0 +1,108 @@
+#-----------------------------------------------------------------------
+#
+# Common functions for testing filename casefold feature
+#
+#-----------------------------------------------------------------------
+# Copyright (c) 2018 Collabora, Ltd. All Rights Reserved.
+#
+# Author: Gabriel Krisman Bertazi <krisman@xxxxxxxxxxxxx>
+#
+# 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
+#-----------------------------------------------------------------------
+
+_has_casefold_feature_kernel_support() {
+ case $FSTYP in
+ ext4)
+ test -f '/sys/fs/ext4/features/casefold'
+ ;;
+ *)
+ # defaults to unsupported
+ false
+ ;;
+ esac
+}
+
+_require_casefold_support() {
+ if ! _has_casefold_feature_kernel_support ; then
+ _notrun "$FSTYP does not support casefold feature"
+ fi
+
+ if ! _scratch_mkfs_casefold &>>seqres.full; then
+ _notrun "$FSTYP userspace tools do not support casefold"
+ fi
+
+ # Make sure the kernel can mount a filesystem with the encoding
+ # defined by the userspace tools. This will fail if
+ # the userspace tool used a more recent encoding than the one
+ # supported in kernel space.
+ if ! _try_scratch_mount &>>seqres.full; then
+ _notrun \
+ "kernel can't mount filesystem using the encoding set by userspace"
+ fi
+ _scratch_unmount
+}
+
+_scratch_mkfs_casefold () {
+ case $FSTYP in
+ ext4)
+ _scratch_mkfs -O casefold $*
+ ;;
+ *)
+ _notrun "Don't know how to mkfs with casefold support on $FSTYP"
+ ;;
+ esac
+}
+
+_scratch_mkfs_casefold_strict () {
+ case $FSTYP in
+ ext4)
+ _scratch_mkfs -O casefold -E encoding_flags=strict
+ ;;
+ *)
+ _notrun \
+ "Don't know how to mkfs with casefold-strict support on $FSTYP"
+ ;;
+ esac
+}
+
+_casefold_check_exact_name () {
+ # To get the exact disk name, we need some method that does a
+ # getdents() on the parent directory, such that we don't get
+ # normalized/casefolded results. 'Find' works ok.
+ basedir=$1
+ exact_name=$2
+ find ${basedir} | grep -q ${exact_name}
+}
+
+_try_set_casefold_attr () {
+ chattr +F "${1}" &>/dev/null
+}
+
+_try_unset_casefold_attr () {
+ chattr -F "${1}" &>/dev/null
+}
+
+_set_casefold_attr () {
+ _try_set_casefold_attr "${1}" || \
+ _fail "Unable to set casefold attribute on ${1}"
+}
+
+_unset_casefold_attr () {
+ _try_unset_casefold_attr "${1}" || \
+ _fail "Unable to unset casefold attribute on ${1}"
+}
+
+_is_casefolded_dir () {
+ lsattr -ld "${1}" | grep -q "Casefold"
+}
--
2.20.1
