driver/swap_driver.sh

   1 #!/bin/sh
   2
   3
   4 # name of the file with module
   5 MODULE_FILE=swap_driver
   6
   7 # device name
   8 DEVICE=__DEV_NAME__
   9 DEVICE_MAJOR=__DEV_MAJOR__
  10
  11 # name of device visible in /proc/devices
  12 DEVICE_NAME=${DEVICE}
  13
  14 # name of the device
  15 DEVICE_FILE=__DEV_DIR__/${DEVICE}
  16
  17 KSYMS=kallsyms_lookup_name
  18
  19 # ADDRESS for "kallsyms_lookup_name" function taken from /proc/kallsyms
  20 ADDRESS=0x`sed "/ kallsyms_lookup_name/ ! d" /proc/kallsyms | sed "s/ T kallsyms_lookup_name//"`
  21
  22 if [ "${ADDRESS}" = "0x" ]; then
  23     if [ "$1" = "" ]; then
  24         echo "Enter kallsyms_lookup_name as parameter:"
  25         echo "insmod.sh <kallsyms_lookup_name address>"
  26         exit
  27     else
  28         ADDRESS=$1
  29         echo "kallsyms_lookup_name address is ${ADDRESS}"
  30     fi
  31 fi
  32
  33 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  34 if [ "${MAJOR}" != "" ] ; then
  35     echo "SWAP Driver is already loaded!"
  36     exit 1
  37     rmmod ${MODULE_FILE}
  38     MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  39     if [ "${MAJOR}" != "" ] ; then
  40         echo "Error: Unable to unload driver module '${MODULE_FILE}'"
  41         exit 1
  42     fi
  43 fi
  44
  45 if [ ! -c ${DEVICE_FILE} ] ; then
  46         echo "WARNING: Creating device node with major number [${DEVICE_MAJOR}]!"
  47         mknod ${DEVICE_FILE} c ${DEVICE_MAJOR} 0
  48         if [ $? -ne 0 ]; then
  49             echo "Error: Unable to create device node!"
  50             exit 1
  51         fi
  52         chmod a+r ${DEVICE_FILE}
  53 else
  54         # stat is better, but DTV doesn't have stat
  55         DEVICE_MAJOR=`ls -l ${DEVICE_FILE} | awk '{sub(/,/,"",$5); print $5}'`
  56 fi
  57
  58 # load driver module
  59 echo "loading module '${MODULE_FILE}'"
  60 ./bin/insmod.sh ${MODULE_FILE}.ko device_name=${DEVICE_NAME} device_major=${DEVICE_MAJOR}
  61 if [ $? -ne 0 ]; then
  62     echo "Error: Unable to load Swap Driver!"
  63     exit 1
  64 fi
  65 MAJOR=`sed "/${DEVICE_NAME}/ ! d" /proc/devices | sed "s/ ${DEVICE_NAME}//"`
  66