/
repit-fs-ext4.sh
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/
repit-fs-ext4.sh
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#####################################################
# Lanchon REPIT - File System Handler #
# Copyright 2016, Lanchon #
#####################################################
#####################################################
# Lanchon REPIT is free software licensed under #
# the GNU General Public License (GPL) version 3 #
# and any later version. #
#####################################################
### ext4
checkTools_fs_ext4() {
# only require tools if actually needed
#checkTool mke2fs
#checkTool e2fsck
#checkTool resize2fs
:
}
processPar_ext4_wipe_dry() {
local n=$1
local dev=$2
local oldStart=$3
local oldSize=$4
local newStart=$5
local newSize=$6
info "will format the partition in ext4 and trim it"
checkTool mke2fs
}
processPar_ext4_wipe_wet() {
local n=$1
local dev=$2
local oldStart=$3
local oldSize=$4
local newStart=$5
local newSize=$6
local footerSize=$(parFooterSize $n)
local newFsSize=$(( newSize - footerSize ))
processParRecreate $n $oldStart $oldSize $newStart $newSize
processParWipeCryptoFooter $n $newStart $newSize $footerSize
info "formatting the partition in ext4 and trimming it"
mke2fs -q -t ext4 -E discard $dev ${newFsSize}s
}
checkFs_ext4() {
local n=$1
local dev=$2
info "checking and trimming the file system"
(set +e; e2fsck -fp -E discard $dev)
case "$?" in
0)
;;
1)
info "file system errors in $(parName $n) were fixed"
;;
2|3)
info "file system errors in $(parName $n) were fixed, but a reboot is needed before continuing"
fatal "reboot needed: please reboot and retry the process to continue"
;;
*)
fatal "file system errors in $(parName $n) could not be automatically fixed (try running 'e2fsck -f $dev')"
;;
esac
}
checkParSize_ext4() {
local n=$1
local dev=$2
local oldSize=$3
local newSize=$4
local footerSize=$(parFooterSize $n)
local newFsSize=$(( newSize - footerSize ))
#if [ $(( newSize < oldSize )) -ne 0 ]; then
#if [ $(( newFsSize < oldSize )) -ne 0 ]; then
if true; then
info "validating the new partition size"
local blockSize=$(tune2fs -l $dev 2>/dev/null | sed -n "s/^Block size:[ ]*\([0-9]*\)[ ]*$/\1/p")
if [ -n "$blockSize" ]; then
#info "file system block size: $blockSize bytes"
local minBlocks=$(resize2fs -P $dev 2>/dev/null | sed -n "s/^Estimated minimum size of the filesystem:[ ]*\([0-9]*\)[ ]*$/\1/p")
if [ -n "$minBlocks" ]; then
local minSize=$(( ( blockSize / sectorSize ) * minBlocks ))
info "estimated minimum file system size: $(printSizeMiB $minSize)"
local newFsFree=$(( newFsSize - minSize ))
if [ $(( newFsFree >= 0 )) -ne 0 ]; then
info "estimated free space after resize: $(printSizeMiB $newFsFree)"
else
fatal "the new partition size is estimated to be too small to hold the current contents of the file system by $(printSizeMiB $(( -newFsFree )) )"
fi
else
warning "partition size validation skipped: cannot estimate the minimum file system size"
fi
else
warning "partition size validation skipped: cannot determine the file system block size"
fi
fi
}
processPar_ext4_keep_dry() {
local n=$1
local dev=$2
local oldStart=$3
local oldSize=$4
local newStart=$5
local newSize=$6
if [ $(( newStart != oldStart )) -ne 0 ]; then
info "will move the ext4 partition"
warning "moving a big ext4 partition can take a very long time; it requires copying the complete partition, including its free space"
fi
if [ $(( newSize != oldSize )) -ne 0 ]; then
info "will resize the ext4 partition"
#checkTool resize2fs
fi
if [ $(( newSize == oldSize )) -ne 0 ]; then
info "will resize the ext4 file system if needed to fit its partition"
#checkTool resize2fs
fi
checkTool e2fsck
checkTool resize2fs
checkFs_ext4 $n $dev
checkParSize_ext4 $n $dev $oldSize $newSize
}
processPar_ext4_keep_wet() {
local n=$1
local dev=$2
local oldStart=$3
local oldSize=$4
local newStart=$5
local newSize=$6
local footerSize=$(parFooterSize $n)
local newFsSize=$(( newSize - footerSize ))
# note: REPIT should not be able to start on encrypted phones due to the block device being locked.
local moveSize=$oldSize
if [ $(( newSize < oldSize )) -ne 0 ]; then
info "shrinking the ext4 file system"
resize2fs -f $dev ${newFsSize}s
info "shrinking the partition entry"
processParRecreate $n $oldStart $oldSize $oldStart $newSize
processParWipeCryptoFooter $n $oldStart $newSize $footerSize
checkFs_ext4 $n $dev
moveSize=$newSize
fi
if [ $(( newStart != oldStart )) -ne 0 ]; then
info "moving the ext4 partition"
processParMove $n $oldStart $newStart $moveSize
checkFs_ext4 $n $dev
fi
if [ $(( newSize > oldSize )) -ne 0 ]; then
info "enlarging the partition entry"
processParRecreate $n $newStart $oldSize $newStart $newSize
processParWipeCryptoFooter $n $newStart $newSize $footerSize
info "enlarging the ext4 file system"
resize2fs -f $dev ${newFsSize}s
checkFs_ext4 $n $dev
fi
if [ $(( newSize == oldSize )) -ne 0 ]; then
info "resizing the ext4 file system if needed to fit its partition"
resize2fs -f $dev ${newFsSize}s
checkFs_ext4 $n $dev
fi
}