tools/testing/selftests/efivarfs/efivarfs.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 efivarfs_mount=/sys/firmware/efi/efivars
   5 test_guid=210be57c-9849-4fc7-a635-e6382d1aec27
   6
   7 check_prereqs()
   8 {
   9         local msg="skip all tests:"
  10
  11         if [ $UID != 0 ]; then
  12                 echo $msg must be run as root >&2
  13                 exit 0
  14         fi
  15
  16         if ! grep -q "^\S\+ $efivarfs_mount efivarfs" /proc/mounts; then
  17                 echo $msg efivarfs is not mounted on $efivarfs_mount >&2
  18                 exit 0
  19         fi
  20 }
  21
  22 run_test()
  23 {
  24         local test="$1"
  25
  26         echo "--------------------"
  27         echo "running $test"
  28         echo "--------------------"
  29
  30         if [ "$(type -t $test)" = 'function' ]; then
  31                 ( $test )
  32         else
  33                 ( ./$test )
  34         fi
  35
  36         if [ $? -ne 0 ]; then
  37                 echo "  [FAIL]"
  38                 rc=1
  39         else
  40                 echo "  [PASS]"
  41         fi
  42 }
  43
  44 test_create()
  45 {
  46         local attrs='\x07\x00\x00\x00'
  47         local file=$efivarfs_mount/$FUNCNAME-$test_guid
  48
  49         printf "$attrs\x00" > $file
  50
  51         if [ ! -e $file ]; then
  52                 echo "$file couldn't be created" >&2
  53                 exit 1
  54         fi
  55
  56         if [ $(stat -c %s $file) -ne 5 ]; then
  57                 echo "$file has invalid size" >&2
  58                 exit 1
  59         fi
  60 }
  61
  62 test_create_empty()
  63 {
  64         local file=$efivarfs_mount/$FUNCNAME-$test_guid
  65
  66         : > $file
  67
  68         if [ ! -e $file ]; then
  69                 echo "$file can not be created without writing" >&2
  70                 exit 1
  71         fi
  72 }
  73
  74 test_create_read()
  75 {
  76         local file=$efivarfs_mount/$FUNCNAME-$test_guid
  77         ./create-read $file
  78 }
  79
  80 test_delete()
  81 {
  82         local attrs='\x07\x00\x00\x00'
  83         local file=$efivarfs_mount/$FUNCNAME-$test_guid
  84
  85         printf "$attrs\x00" > $file
  86
  87         if [ ! -e $file ]; then
  88                 echo "$file couldn't be created" >&2
  89                 exit 1
  90         fi
  91
  92         rm $file 2>/dev/null
  93         if [ $? -ne 0 ]; then
  94                 chattr -i $file
  95                 rm $file
  96         fi
  97
  98         if [ -e $file ]; then
  99                 echo "$file couldn't be deleted" >&2
 100                 exit 1
 101         fi
 102
 103 }
 104
 105 # test that we can remove a variable by issuing a write with only
 106 # attributes specified
 107 test_zero_size_delete()
 108 {
 109         local attrs='\x07\x00\x00\x00'
 110         local file=$efivarfs_mount/$FUNCNAME-$test_guid
 111
 112         printf "$attrs\x00" > $file
 113
 114         if [ ! -e $file ]; then
 115                 echo "$file does not exist" >&2
 116                 exit 1
 117         fi
 118
 119         chattr -i $file
 120         printf "$attrs" > $file
 121
 122         if [ -e $file ]; then
 123                 echo "$file should have been deleted" >&2
 124                 exit 1
 125         fi
 126 }
 127
 128 test_open_unlink()
 129 {
 130         local file=$efivarfs_mount/$FUNCNAME-$test_guid
 131         ./open-unlink $file
 132 }
 133
 134 # test that we can create a range of filenames
 135 test_valid_filenames()
 136 {
 137         local attrs='\x07\x00\x00\x00'
 138         local ret=0
 139
 140         local file_list="abc dump-type0-11-1-1362436005 1234 -"
 141         for f in $file_list; do
 142                 local file=$efivarfs_mount/$f-$test_guid
 143
 144                 printf "$attrs\x00" > $file
 145
 146                 if [ ! -e $file ]; then
 147                         echo "$file could not be created" >&2
 148                         ret=1
 149                 else
 150                         rm $file 2>/dev/null
 151                         if [ $? -ne 0 ]; then
 152                                 chattr -i $file
 153                                 rm $file
 154                         fi
 155                 fi
 156         done
 157
 158         exit $ret
 159 }
 160
 161 test_invalid_filenames()
 162 {
 163         local attrs='\x07\x00\x00\x00'
 164         local ret=0
 165
 166         local file_list="
 167                 -1234-1234-1234-123456789abc
 168                 foo
 169                 foo-bar
 170                 -foo-
 171                 foo-barbazba-foob-foob-foob-foobarbazfoo
 172                 foo-------------------------------------
 173                 -12345678-1234-1234-1234-123456789abc
 174                 a-12345678=1234-1234-1234-123456789abc
 175                 a-12345678-1234=1234-1234-123456789abc
 176                 a-12345678-1234-1234=1234-123456789abc
 177                 a-12345678-1234-1234-1234=123456789abc
 178                 1112345678-1234-1234-1234-123456789abc"
 179
 180         for f in $file_list; do
 181                 local file=$efivarfs_mount/$f
 182
 183                 printf "$attrs\x00" 2>/dev/null > $file
 184
 185                 if [ -e $file ]; then
 186                         echo "Creating $file should have failed" >&2
 187                         rm $file 2>/dev/null
 188                         if [ $? -ne 0 ]; then
 189                                 chattr -i $file
 190                                 rm $file
 191                         fi
 192                         ret=1
 193                 fi
 194         done
 195
 196         exit $ret
 197 }
 198
 199 check_prereqs
 200
 201 rc=0
 202
 203 run_test test_create
 204 run_test test_create_empty
 205 run_test test_create_read
 206 run_test test_delete
 207 run_test test_zero_size_delete
 208 run_test test_open_unlink
 209 run_test test_valid_filenames
 210 run_test test_invalid_filenames
 211
 212 exit $rc