ext4_utils/mkuserimg_mke2fs.sh

   1 #!/bin/bash
   2 #
   3 # To call this script, make sure mke2fs is somewhere in PATH
   4
   5 function usage() {
   6 cat<<EOT
   7 Usage:
   8 mkuserimg.sh [-s] SRC_DIR OUTPUT_FILE EXT_VARIANT MOUNT_POINT SIZE [-j <journal_size>]
   9              [-T TIMESTAMP] [-C FS_CONFIG] [-D PRODUCT_OUT] [-B BLOCK_LIST_FILE]
  10              [-d BASE_ALLOC_FILE_IN ] [-A BASE_ALLOC_FILE_OUT ] [-L LABEL]
  11              [-i INODES ] [-e ERASE_BLOCK_SIZE] [-o FLASH_BLOCK_SIZE] [FILE_CONTEXTS]
  12 EOT
  13 }
  14
  15 BLOCKSIZE=4096
  16
  17 MKE2FS_OPTS=""
  18 MKE2FS_EXTENDED_OPTS=""
  19 E2FSDROID_OPTS=""
  20
  21 if [ "$1" = "-s" ]; then
  22   MKE2FS_EXTENDED_OPTS+="android_sparse"
  23   shift
  24 else
  25   E2FSDROID_OPTS+="-e"
  26 fi
  27
  28 if [ $# -lt 5 ]; then
  29   usage
  30   exit 1
  31 fi
  32
  33 SRC_DIR=$1
  34 if [ ! -d $SRC_DIR ]; then
  35   echo "Can not find directory $SRC_DIR!"
  36   exit 2
  37 fi
  38
  39 OUTPUT_FILE=$2
  40 EXT_VARIANT=$3
  41 MOUNT_POINT=$4
  42 SIZE=$5
  43 shift; shift; shift; shift; shift
  44
  45 if [ "$1" = "-j" ]; then
  46   if [ "$2" = "0" ]; then
  47     MKE2FS_OPTS+="-O ^has_journal"
  48   else
  49     MKE2FS_OPTS+="-J size=$2"
  50   fi
  51   shift; shift
  52 fi
  53
  54 if [[ "$1" == "-T" ]]; then
  55   E2FSDROID_OPTS+=" -T $2"
  56   shift; shift
  57 fi
  58
  59 if [[ "$1" == "-C" ]]; then
  60   E2FSDROID_OPTS+=" -C $2"
  61   shift; shift
  62 fi
  63
  64 if [[ "$1" == "-D" ]]; then
  65   E2FSDROID_OPTS+=" -p $2"
  66   shift; shift
  67 fi
  68
  69 if [[ "$1" == "-B" ]]; then
  70   E2FSDROID_OPTS+=" -B $2"
  71   shift; shift
  72 fi
  73
  74 if [[ "$1" == "-d" ]]; then
  75   E2FSDROID_OPTS+=" -d $2"
  76   shift; shift
  77 fi
  78
  79 if [[ "$1" == "-A" ]]; then
  80   E2FSDROID_OPTS+=" -D $2"
  81   shift; shift
  82 fi
  83
  84 if [[ "$1" == "-L" ]]; then
  85   MKE2FS_OPTS+=" -L $2"
  86   shift; shift
  87 fi
  88
  89 if [[ "$1" == "-i" ]]; then
  90   MKE2FS_OPTS+=" -N $2"
  91   shift; shift
  92 fi
  93
  94 if [[ "$1" == "-e" ]]; then
  95   if [[ $MKE2FS_EXTENDED_OPTS ]]; then
  96     MKE2FS_EXTENDED_OPTS+=","
  97   fi
  98   MKE2FS_EXTENDED_OPTS+="stripe_width=$(($2/BLOCKSIZE))"
  99   shift; shift
 100 fi
 101
 102 if [[ "$1" == "-o" ]]; then
 103   if [[ $MKE2FS_EXTENDED_OPTS ]]; then
 104     MKE2FS_EXTENDED_OPTS+=","
 105   fi
 106   # stride should be the max of 8kb and the logical block size
 107   MKE2FS_EXTENDED_OPTS+="stride=$((($2 > 8192 ? $2 : 8192) / BLOCKSIZE))"
 108   shift; shift
 109 fi
 110
 111 if [[ $MKE2FS_EXTENDED_OPTS ]]; then
 112   MKE2FS_OPTS+=" -E $MKE2FS_EXTENDED_OPTS"
 113 fi
 114
 115 if [[ $1 ]]; then
 116   E2FSDROID_OPTS+=" -S $1"
 117 fi
 118
 119 case $EXT_VARIANT in
 120   ext4) ;;
 121   *) echo "Only ext4 is supported!"; exit 3 ;;
 122 esac
 123
 124 if [ -z $MOUNT_POINT ]; then
 125   echo "Mount point is required"
 126   exit 2
 127 fi
 128
 129 if [[ ${MOUNT_POINT:0:1} != "/" ]]; then
 130   MOUNT_POINT="/"$MOUNT_POINT
 131 fi
 132
 133 if [ -z $SIZE ]; then
 134   echo "Need size of filesystem"
 135   exit 2
 136 fi
 137
 138 # Round down the filesystem length to be a multiple of the block size
 139 SIZE=$((SIZE / BLOCKSIZE))
 140
 141 # truncate output file since mke2fs will keep verity section in existing file
 142 cat /dev/null >$OUTPUT_FILE
 143
 144 MAKE_EXT4FS_CMD="mke2fs $MKE2FS_OPTS -t $EXT_VARIANT -b $BLOCKSIZE $OUTPUT_FILE $SIZE"
 145 echo $MAKE_EXT4FS_CMD
 146 MKE2FS_CONFIG=./system/extras/ext4_utils/mke2fs.conf $MAKE_EXT4FS_CMD
 147 if [ $? -ne 0 ]; then
 148   exit 4
 149 fi
 150
 151 E2FSDROID_CMD="e2fsdroid $E2FSDROID_OPTS -f $SRC_DIR -a $MOUNT_POINT $OUTPUT_FILE"
 152 echo $E2FSDROID_CMD
 153 $E2FSDROID_CMD
 154 if [ $? -ne 0 ]; then
 155   rm -f $OUTPUT_FILE
 156   exit 4
 157 fi