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Use dump.f2fs to extract files from efs partitions

Browse source 
Previously, we rely on mount points to copy files out of
efs partitions. Switch over to dump.f2fs to read directly
from block device without mounting. This allows us to copy
files out of efs partition in both 4K and 16K mode.

Test: Boot dev option enabled ext4 device
Bug: 340965747
Change-Id: I9d3f3d5200adc31f13298488b5be068b0fe7c7f4
This commit is contained in:
Kelvin Zhang 2024-06-04 09:56:33 -07:00
parent 5978809ae7
commit e3ed1eabdf
3 changed files with 5 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

12
copy_efs_files_to_data.sh
View file

@ -8,19 +8,19 @@ $BIN_DIR/mkdir -p $CHECKPOINT_DIR
function copy_files_to_data()
{
block_device=$1
partition_name=$(basename $1)
mount_point=$2
tmpdir=$CHECKPOINT_DIR/$partition_name.img
build_checkpoint=$CHECKPOINT_DIR/$partition_name
if [ ! -e $build_checkpoint ]; then
$BIN_DIR/rm -rf $tmpdir
$BIN_DIR/rm -rf $build_checkpoint
cp -rp $mount_point $tmpdir
$BIN_DIR/mkdir -p $tmpdir
$BIN_DIR/dump.f2fs -rfPo $tmpdir $block_device
if [ $? -ne 0 ]; then
echo "Failed to cp -rp $mount_point $tmpdir"
echo "Failed to $BIN_DIR/dump.f2fs -rfPo $tmpdir $block_device"
return
fi
fsync `find $tmpdir -type fd`
mv $tmpdir $build_checkpoint
if [ $? -ne 0 ]; then
echo "mv $tmpdir $build_checkpoint"
@ -31,12 +31,8 @@ function copy_files_to_data()
echo "Successfully copied $mount_point to $build_checkpoint"
}
chmod g+rx -R /mnt/vendor/efs
chmod g+rx -R /mnt/vendor/efs_backup
chmod g+rx -R /mnt/vendor/modem_userdata
copy_files_to_data "/dev/block/by-name/efs" "/mnt/vendor/efs"
copy_files_to_data "/dev/block/by-name/efs_backup" "/mnt/vendor/efs_backup"
copy_files_to_data "/dev/block/by-name/modem_userdata" "/mnt/vendor/modem_userdata"
chmod g+rx -R /mnt/vendor/persist
copy_files_to_data "/dev/block/by-name/persist" "/mnt/vendor/persist"