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My revised version of the partition tool
The fdisk and mkfs was factored out into a shell function so that it is easier to create dirfferent partition layouts. The default case was left the same as the original script The partitions can be specified as percentages of the available space (after Qi reserved space has been taken out) by providing a comma separated list of values: e.g. 25,0,50 Which would create partitions 1 and 3 with 25% and 50% of the usable capacity. Partitions 2 and 4 would not be assigned. Signed-off-by: Christopher Hall <hsw@openmoko.com>
This commit is contained in:
Christopher Hall
Andy Green
parent
8b75ed7105
commit
683fc5a92a
@ -3,7 +3,7 @@
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# (C) 2008 Openmoko, Inc
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# Author: Andy Green <andy@openmoko.com>
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# LAYOUT
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# LAYOUT (if partition parameter is not specified)
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# Partition table, then
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# VFAT takes up remaining space here
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# then...
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@ -13,7 +13,7 @@ EXT3_BACKUP_FS_SECTORS=$(( 8 * 1024 * 2 ))
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QI_ALLOCATION=$(( 256 * 2 ))
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#
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# lastly fixed stuff: 8KByte initial boot, sig, padding
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#
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# ----------------------
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echo "s3c6410 bootable SD partitioning utility"
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@ -24,109 +24,258 @@ echo
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QI_INITIAL=$(( 8 * 2 ))
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SIG=1
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FDISK_SCRIPT=/tmp/_fds
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if [ -z "$1" -o -z "$2" -o -z "$3" ] ; then
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echo "This formats a SD card for usage on SD Card boot"
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echo " on 6410 based systems"
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# display usage message and exit
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# any arguments are displayed as an error message
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USAGE()
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{
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echo
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echo "Usage:"
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[ -z "$1" ] || echo ERROR: $*
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echo
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echo "$0 <device for SD, eg, sde> <sd|sdhc> <bootloader>"
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echo 'This formats a SD card for usage on SD Card boot'
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echo ' on 6410 based systems'
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echo
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echo Usage: $(basename "$0") '<device> <card> <bootloader> <partition>'
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echo ' device = disk device name for SD Card, e.g. sde /dev/sdf'
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echo ' card = sd | sdhc'
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echo ' bootloader = /path/to/qi-binary'
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echo ' partition = vfat | NN | NN,NN | NN,NN,NN | NN,NN,NN,NN | no'
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echo ' * vfat -> main-vfat[rest] + rootfs[256M] + backupfs[8M]'
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echo ' NN -> rootfs1[NN%] + .. + rootfs4[NN%]'
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echo ' NN=0 -> will skip the partition'
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echo ' no -> leave partitions alone'
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echo
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echo 'Note: * => default action if no parameter specified'
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echo ' sum(NN) must be in [1..100]'
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echo
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echo 'e.g. '$(basename "$0")' sdb sdhc images/qi 0,30,0,45'
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echo ' will format an SDHC with partition 2 receiving 20% and partition 4'
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echo ' receiving 45% of the disk capacity and the remaining 35% will be'
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echo ' unused.'
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echo ' Capacity is calculated after subtracting the space reserved for Qi.'
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echo ' Partitions 1 and 3 will not be used.'
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exit 1
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fi
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}
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if [ $2 = "sdhc" ] ; then
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PADDING=1025
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else
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PADDING=1
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fi
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[ -z "$1" -o -z "$2" -o -z "$3" ] && USAGE 'Missing arguments'
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EXT3_TOTAL_SECTORS=$(( $EXT3_ROOTFS_SECTORS + $EXT3_BACKUP_FS_SECTORS ))
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REARSECTORS=$(( $QI_ALLOCATION + $QI_INITIAL + $SIG + $PADDING ))
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dev="$1"
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card="$2"
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qi="$3"
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partition="$4"
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if [ ! -z "`grep $1 /proc/mounts`" ] ; then
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echo "ERROR $1 seems to be mounted, that ain't right"
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exit 2
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fi
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case "${card}" in
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[sS][dD][hH][cC])
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PADDING=1025
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;;
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[sS][dD])
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PADDING=1
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;;
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*)
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USAGE "${card} is an unknown card type"
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esac
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bytes=`echo p | fdisk /dev/$1 2>&1 | sed '/^Disk.*, \([0-9]*\) bytes/s//\1/p;d'`
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echo bytes = $bytes
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# the amount of space that must remain unused at the end of the disk
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REAR_SECTORS=$(( $QI_ALLOCATION + $QI_INITIAL + $SIG + $PADDING ))
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SECTORS=`expr $bytes / 512`
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# validate parameters
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[ -b "${dev}" ] || dev="/dev/${dev}"
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[ -b "${dev}" ] || USAGE "${dev} is not a valid block device"
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[ X"${dev}" = X"${dev%%[0-9]}" ] || USAGE "${dev} is a partition, please use device: perhaps ${dev%%[0-9]}"
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if [ -z "$SECTORS" ] ; then
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echo "problem finding size for /dev/$1"
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exit 4
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fi
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echo "Checking for mounted partitions..."
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grep "${dev}" /proc/mounts && USAGE "partitions on ${dev} are mounted, please unmount them"
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[ -e "${qi}" ] || USAGE "bootloader file: ${qi} does not exist"
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if [ "$SECTORS" -le 0 ] ; then
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echo "problem finding size for /dev/$1"
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exit 3
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fi
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# get size of device
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bytes=$(echo p | fdisk "${dev}" 2>&1 | sed '/^Disk.*, \([0-9]*\) bytes/s//\1/p;d')
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SECTORS=$(($bytes / 512))
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echo "$1 is $SECTORS 512-byte blocks"
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[ -z "$SECTORS" ] && USAGE "could not find size for ${dev}"
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[ "$SECTORS" -le 0 ] && USAGE "invalid size: '${SECTORS}' for ${dev}"
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if [ -z "$4" ] ; then
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echo "${dev} is $SECTORS 512-byte blocks"
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FATSECTORS=$(( $SECTORS - $EXT3_TOTAL_SECTORS - $REARSECTORS ))
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FATMB=$(( $FATSECTORS / 2048 ))
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# Partition and format a disk (or SD card)
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# Parameters to format function are:
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#
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# device -> device to partition e.g. /dev/sdX
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#
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# Partition 1 parameters:
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#
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# label -> file system volume label e.g. rootfs
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# sizeMB -> size of the partition in MB e.g. 256
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# fstype -> filesystem type e.g. ext2, ext3, vfat (look at /sbin/mkfs.* for others)
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#
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# Notes: 1. Repeat "label, sizeMB, fstype" for partitions 2..4
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# 2. Partitions 2..4 are optional
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# 3. Do not repeat device parameter
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# 4. To skip a partition use: 'null 0 none' for that partition
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echo "Creating VFAT section $FATMB MB"
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FORMAT()
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{
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local device label sizeMB fstype p partition flag skip
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device="$1"; shift
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(
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p=0
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flag=0
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echo o
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while [ $# -gt 0 ]
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do
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label="$1"; shift
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sizeMB="$1"; shift
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fstype="$1"; shift
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p=$((${p} + 1))
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skip=NO
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[ ${sizeMB} -le 0 ] && skip=YES
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case "${label}" in
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[nN][uU][lL][lL])
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skip=YES
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;;
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*)
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;;
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esac
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case "${skip}" in
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[yY][eE][sS]|[yY])
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;;
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*)
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echo n
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echo p
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echo ${p}
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echo
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echo +${sizeMB}M
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case "${fstype}" in
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[vV][fF][aA][tT]|[mM][sS][dD][oO][sS])
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echo t
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# fdisk is "helpful" & will auto select partition if there is only one
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# so do not output partition number if this is the first partition
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[ "${flag}" -eq 1 ] && echo ${p}
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echo 0b
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;;
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*)
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;;
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esac
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flag=1
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;;
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esac
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done
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echo p
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echo w
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echo q
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) | fdisk "${device}"
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p=0
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while [ $# -gt 0 ]
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do
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label="$1"; shift
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sizeMB="$1"; shift
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fstype="$1"; shift
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p=$((${p} + 1))
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partition="${dev}${p}"
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skip=NO
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[ ${sizeMB} -eq 0 ] && skip=YES
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case "${label}" in
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[nN][uU][lL][lL])
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skip=YES
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;;
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esac
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# create the script for fdisk
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# clear the existing partition table
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echo "o" >$FDISK_SCRIPT
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case "${skip}" in
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[yY][eE][sS]|[yY])
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echo "Skipping: ${partition}"
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;;
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*)
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echo "Formatting: ${partition} -> ${fstype}[${sizeMB}MB]"
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case "${fstype}" in
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[vV][fF][aA][tT]|[mM][sS][dD][oO][sS])
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mkfs.${fstype} -n "${label}" "${partition}"
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;;
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*)
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mkfs.${fstype} -L "${label}" "${partition}"
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;;
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esac
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;;
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esac
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done
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}
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# add main VFAT storage partition
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echo "n" >>$FDISK_SCRIPT
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echo "p" >>$FDISK_SCRIPT
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echo "1" >>$FDISK_SCRIPT
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# first partition == 1
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echo "" >>$FDISK_SCRIPT
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echo "+$FATMB"M >>$FDISK_SCRIPT
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# format the disk
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case "${partition}" in
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# add the normal EXT3 rootfs
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echo "n" >>$FDISK_SCRIPT
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echo "p" >>$FDISK_SCRIPT
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echo "2" >>$FDISK_SCRIPT
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# continue after last
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echo "" >>$FDISK_SCRIPT
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echo "+$(( $EXT3_ROOTFS_SECTORS / 2048 ))"M >>$FDISK_SCRIPT
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# this case also hadles the default case (i.e. empty string: "")
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[vV][fF][aA][tT]|"")
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EXT3_TOTAL_SECTORS=$(( $EXT3_ROOTFS_SECTORS + $EXT3_BACKUP_FS_SECTORS ))
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FAT_SECTORS=$(( $SECTORS - $EXT3_TOTAL_SECTORS - $REAR_SECTORS ))
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FAT_MB=$(( $FAT_SECTORS / 2048 ))
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EXT3_ROOTFS_MB=$(( ${EXT3_ROOTFS_SECTORS} / 2048 ))
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EXT3_BACKUP_FS_MB=$(( ${EXT3_BACKUP_FS_SECTORS} / 2048 ))
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# add the backup EXT3 rootfs
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echo "n" >>$FDISK_SCRIPT
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echo "p" >>$FDISK_SCRIPT
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echo "3" >>$FDISK_SCRIPT
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# continue after last
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echo "" >>$FDISK_SCRIPT
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echo "+$(( $EXT3_BACKUP_FS_SECTORS / 2048 ))"M >>$FDISK_SCRIPT
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echo Creating VFAT partition of ${FAT_MB} MB
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echo Creating Linux partition of ${EXT3_ROOTFS_MB} MB
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echo Creating backup Linux partition of ${EXT3_BACKUP_FS_MB} MB
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FORMAT "${dev}" \
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main-vfat "${FAT_MB}" vfat \
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rootfs "${EXT3_ROOTFS_MB}" ext3 \
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backupfs "${EXT3_BACKUP_FS_MB}" ext3
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;;
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# commit it and exit
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echo "w" >>$FDISK_SCRIPT
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echo "q" >>$FDISK_SCRIPT
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# decode partition or partition list
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*,*|100|[1-9][0-9]|[1-9])
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arg="${partition},"
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for v in 1 2 3 4
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do
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eval n${v}="\${arg%%,*}"
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eval n${v}="\${n${v}:-0}"
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arg="${arg#*,},"
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done
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total=$(( ${n1} + ${n2} + ${n3} + ${n4} ))
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echo Percentage of disk partitioned = ${total}%
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[ ${total} -gt 100 -o ${total} -lt 1 ] && USAGE partition: "'${partition}' => ${total}% outside [1..100]"
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# do the partitioning action
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fdisk /dev/$1 <$FDISK_SCRIPT
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EXT3_TOTAL_SECTORS=$(( $SECTORS - $REAR_SECTORS ))
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EXT3_ROOTFS1_SECTORS=$(( $EXT3_TOTAL_SECTORS * $n1 / 100 ))
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EXT3_ROOTFS2_SECTORS=$(( $EXT3_TOTAL_SECTORS * $n2 / 100 ))
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EXT3_ROOTFS3_SECTORS=$(( $EXT3_TOTAL_SECTORS * $n3 / 100 ))
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EXT3_ROOTFS4_SECTORS=$(( $EXT3_TOTAL_SECTORS * $n4 / 100 ))
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EXT3_ROOTFS1_MB=$(( ${EXT3_ROOTFS1_SECTORS} / 2048 ))
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EXT3_ROOTFS2_MB=$(( ${EXT3_ROOTFS2_SECTORS} / 2048 ))
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EXT3_ROOTFS3_MB=$(( ${EXT3_ROOTFS3_SECTORS} / 2048 ))
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EXT3_ROOTFS4_MB=$(( ${EXT3_ROOTFS4_SECTORS} / 2048 ))
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# prep the filesystems
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echo Creating Linux partition 1 of ${EXT3_ROOTFS1_MB} MB
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echo Creating Linux partition 2 of ${EXT3_ROOTFS2_MB} MB
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echo Creating Linux partition 3 of ${EXT3_ROOTFS3_MB} MB
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echo Creating Linux partition 4 of ${EXT3_ROOTFS4_MB} MB
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mkfs.vfat "/dev/$1"1 -n main-vfat
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mkfs.ext3 "/dev/$1"2 -L rootfs
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mkfs.ext3 "/dev/$1"3 -L backupfs
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FORMAT "${dev}" \
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rootfs1 "${EXT3_ROOTFS1_MB}" ext3 \
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rootfs2 "${EXT3_ROOTFS2_MB}" ext3 \
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rootfs3 "${EXT3_ROOTFS3_MB}" ext3 \
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rootfs4 "${EXT3_ROOTFS4_MB}" ext3
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;;
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[Nn]*)
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# do not format
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;;
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*)
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USAGE "'${partition}' is an unknown partition config"
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;;
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esac
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fi # if -z $4
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# copy the full bootloader image to the right place after the
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# partitioned area
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dd if=$3 of=/dev/$1 bs=512 count=512 \
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seek=$(( $SECTORS - $REARSECTORS ))
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dd if=$3 of=/dev/$1 bs=512 \
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seek=$(( $SECTORS - $REARSECTORS + $QI_ALLOCATION )) \
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echo
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echo Installing Qi bootloader from: ${qi}
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dd if="${qi}" of="${dev}" bs=512 count=512 \
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seek=$(( $SECTORS - $REAR_SECTORS ))
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dd if="${qi}" of="${dev}" bs=512 \
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seek=$(( $SECTORS - $REAR_SECTORS + $QI_ALLOCATION )) \
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count=$QI_INITIAL
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dd if=/dev/zero of=/dev/$1 bs=512 \
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seek=$(( $SECTORS - $REARSECTORS + $QI_ALLOCATION + $QI_INITIAL )) \
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dd if=/dev/zero of="${dev}" bs=512 \
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seek=$(( $SECTORS - $REAR_SECTORS + $QI_ALLOCATION + $QI_INITIAL )) \
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count=$(( $SIG + $PADDING ))
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# done
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