7b4f21e81d
Currently the persist partition is formatted as ext4. In order to convert the partition to f2fs without losing data, add a script which will copy the partition contents out, format the partition as f2fs and then copy the contents back. Bug: 202511062 Signed-off-by: Konstantin Vyshetsky <vkon@google.com> Change-Id: I89502694d1e02261902525c11ac875dd7756721b
81 lines
1.4 KiB
Bash
81 lines
1.4 KiB
Bash
#!/bin/sh
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BLK=$1
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FORMAT_ONLY=$2
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MNT_OLD="/mnt/convert_old"
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MNT_NEW="/mnt/convert_new"
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function log() {
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if [ ! -z "$1" ]; then
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echo "partition_convert: $1" > /dev/kmsg
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fi
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}
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function check_success() {
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if [ $? -ne 0 ]; then
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log "Failed: $1"
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exit -1
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fi
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log "Success: $1"
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}
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F2FS_MAGIC=$(xxd $BLK -s 0x400 -l 4 -p)
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if [ "$F2FS_MAGIC" = "1020f5f2" ]; then
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log "$BLK is already f2fs - skipping"
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exit 0
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fi
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EXT4_MAGIC=$(xxd $BLK -s 0x438 -l 2 -p)
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if [ "$EXT4_MAGIC" != "53ef" ]; then
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log "Unknown filesystem $EXT4_MAGIC"
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exit -1
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fi
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if [ $FORMAT_ONLY == "true" ]; then
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make_f2fs $BLK 2>&1 > /dev/null
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check_success "make_f2fs $BLK"
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sync
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check_success "sync"
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exit 0
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fi
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mkdir -p $MNT_OLD
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check_success "mkdir $MNT_OLD"
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mkdir -p $MNT_NEW
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check_success "mkdir $MNT_NEW"
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mount -t ext4 $BLK $MNT_OLD
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check_success "mount $MNT_OLD as ext4"
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mount -t tmpfs tmpfs $MNT_NEW
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check_success "mount $MNT_NEW as tmpfs"
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cp -rp $MNT_OLD/* $MNT_NEW/
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check_success "copy $MNT_OLD to $MNT_NEW"
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umount $MNT_OLD
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check_success "umount $MNT_OLD"
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make_f2fs $BLK 2>&1 > /dev/null
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check_success "make_f2fs $BLK"
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mount -t f2fs $BLK $MNT_OLD
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check_success "mount $MNT_OLD as f2fs"
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cp -rp $MNT_NEW/* $MNT_OLD/
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check_success "copy $MNT_NEW to $MNT_OLD"
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sync
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check_success "sync"
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umount $MNT_OLD
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check_success "umount $MNT_OLD"
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umount $MNT_NEW
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check_success "umount $MNT_NEW"
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rmdir $MNT_OLD
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check_success "rmdir $MNT_OLD"
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rmdir $MNT_NEW
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check_success "rmdir $MNT_NEW"
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