1 #!/bin/bash 2 3 # This is the script that was used to create the image.gz in this directory. 4 5 set -e -u 6 7 BLOCKSIZE=4096 8 9 do_debugfs() { 10 umount mnt 11 debugfs -w "$@" image 12 mount image mnt 13 } 14 15 do_tune2fs() { 16 umount mnt 17 tune2fs $@ image 18 mount image mnt 19 } 20 21 symlink() { 22 local len=$1 23 local src=$2 24 local target=$(perl -e 'print "A" x '$len) 25 ln -s $target $src 26 stat -c %i $src 27 } 28 29 # Overwrite the length in the header of the encrypted symlink target 30 set_encrypted_symlink_len() { 31 local ino=$1 32 local len=$2 33 34 echo "zap_block -f <$ino> -p $((len%256)) -o 0 -l 1 0" 35 echo "zap_block -f <$ino> -p $((len/256)) -o 1 -l 1 0" 36 } 37 38 create_symlinks() { 39 local dir=$1 40 local encrypted=${2:-false} 41 local overhead=0 42 local ino 43 44 if $encrypted; then 45 overhead=2 46 fi 47 48 mkdir -p $dir 49 50 { 51 ino=$(symlink 1 $dir/empty) 52 echo "set_inode_field <$ino> i_size 10" 53 echo "set_inode_field <$ino> block[0] 0" 54 55 symlink 1 $dir/fast_min > /dev/null 56 57 ino=$(symlink 10 $dir/fast_isize_too_small) 58 echo "set_inode_field <$ino> i_size 1" 59 60 ino=$(symlink 10 $dir/fast_isize_too_large) 61 echo "set_inode_field <$ino> i_size 20" 62 63 symlink $((59 - overhead)) $dir/fast_max > /dev/null 64 65 symlink $((60 - overhead)) $dir/slow_min > /dev/null 66 67 ino=$(symlink 100 $dir/slow_isize_too_small) 68 echo "set_inode_field <$ino> i_size 80" 69 70 ino=$(symlink 100 $dir/slow_isize_too_large) 71 echo "set_inode_field <$ino> i_size 120" 72 73 symlink $((BLOCKSIZE - 1 - overhead)) $dir/slow_max > /dev/null 74 75 ino=$(symlink $((BLOCKSIZE - 1 - overhead)) $dir/one_too_long) 76 echo "set_inode_field <$ino> i_size $BLOCKSIZE" 77 echo "zap_block -f <$ino> -p 65 0" 78 if $encrypted; then 79 set_encrypted_symlink_len $ino $((BLOCKSIZE - overhead)) 80 fi 81 82 ino=$(symlink $((BLOCKSIZE - 1 - overhead)) $dir/too_long) 83 echo "set_inode_field <$ino> i_size $((BLOCKSIZE + 1000))" 84 echo "zap_block -f <$ino> -p 65 0" 85 if $encrypted; then 86 set_encrypted_symlink_len $ino $((BLOCKSIZE + 1000 - overhead)) 87 fi 88 89 } >> debugfs_commands 90 do_debugfs < debugfs_commands 91 } 92 93 create_encrypted_symlinks() { 94 local dir=$1 link 95 96 mkdir $dir 97 echo | e4crypt add_key $dir 98 create_symlinks $dir true 99 100 # Move symlinks into an unencrypted directory (leaving their targets 101 # encrypted). This makes the fsck output consistent. 102 mv $dir ${dir}~encrypted 103 mkdir $dir 104 mv ${dir}~encrypted/* $dir 105 } 106 107 mkdir -p mnt 108 umount mnt &> /dev/null || true 109 dd if=/dev/zero of=image bs=1024 count=600 110 111 mke2fs -O 'encrypt,^extents,^64bit' -b $BLOCKSIZE -I 256 image 112 mount image mnt 113 114 create_symlinks mnt/default 115 create_encrypted_symlinks mnt/encrypted 116 117 do_tune2fs -O extents 118 create_symlinks mnt/extents 119 create_encrypted_symlinks mnt/extents_encrypted 120 121 do_debugfs -R 'feature inline_data' 122 create_symlinks mnt/inline_data 123 124 rm -rf debugfs_commands mnt/*~encrypted 125 umount mnt 126 rmdir mnt 127 gzip -9 -f image 128
