common/casefold

   1 # SPDX-License-Identifier: GPL-2.0+
   2 # Copyright (c) 2019 Collabora, Ltd.  All Rights Reserved.
   3 #
   4 # Common functions for testing filename casefold feature
   5
   6 _has_casefold_kernel_support()
   7 {
   8         case $FSTYP in
   9         ext4)
  10                 test -f '/sys/fs/ext4/features/casefold'
  11                 ;;
  12         f2fs)
  13                 test -f '/sys/fs/f2fs/features/casefold'
  14                 ;;
  15         *)
  16                 # defaults to unsupported
  17                 false
  18                 ;;
  19         esac
  20 }
  21
  22 _require_scratch_casefold()
  23 {
  24         if ! _has_casefold_kernel_support ; then
  25                 _notrun "$FSTYP does not support casefold feature"
  26         fi
  27
  28         if ! _scratch_mkfs_casefold &>>seqres.full; then
  29                 _notrun "$FSTYP userspace tools do not support casefold"
  30         fi
  31
  32         # Make sure the kernel can mount a filesystem with the encoding
  33         # defined by the userspace tools.  This will fail if
  34         # the userspace tool used a more recent encoding than the one
  35         # supported in kernel space.
  36         if ! _try_scratch_mount &>>seqres.full; then
  37                 _notrun "kernel can't mount filesystem with the encoding set by userspace"
  38         fi
  39         _scratch_unmount
  40
  41         # utilities used by casefold
  42         _require_command "$CHATTR_PROG" chattr
  43         _require_command "$LSATTR_PROG" lsattr
  44 }
  45
  46 _scratch_mkfs_casefold()
  47 {
  48         case $FSTYP in
  49         ext4)
  50                 _scratch_mkfs -O casefold $*
  51                 ;;
  52         f2fs)
  53                 _scratch_mkfs -C utf8 $*
  54                 ;;
  55         *)
  56                 _notrun "Don't know how to mkfs with casefold support on $FSTYP"
  57                 ;;
  58         esac
  59 }
  60
  61 _scratch_mkfs_casefold_strict()
  62 {
  63         case $FSTYP in
  64         ext4)
  65                 _scratch_mkfs -O casefold -E encoding_flags=strict
  66                 ;;
  67         f2fs)
  68                 _scratch_mkfs -C utf8:strict
  69                 ;;
  70         *)
  71                 _notrun "Don't know how to mkfs with casefold-strict support on $FSTYP"
  72                 ;;
  73         esac
  74 }
  75
  76 # To get the exact disk name, we need some method that does a
  77 # getdents() on the parent directory, such that we don't get
  78 # normalized/casefolded results.  'Find' works ok.
  79 _casefold_check_exact_name()
  80 {
  81         local basedir=$1
  82         local exact_name=$2
  83         find ${basedir} | grep -q ${exact_name}
  84 }
  85
  86 _casefold_set_attr()
  87 {
  88         $CHATTR_PROG +F "${1}"
  89 }
  90
  91 _casefold_unset_attr()
  92 {
  93         $CHATTR_PROG -F "${1}"
  94 }
  95
  96 _casefold_lsattr_dir()
  97 {
  98         if $LSATTR_PROG -ld "${1}" | grep -q Casefold ; then
  99                 echo "${1} Casefold"
 100         else
 101                 echo "${1}"
 102         fi
 103 }