1 files changed, 0 insertions, 217 deletions

diff --git a/old-school/mdadm-dup.sh b/old-school/mdadm-dup.sh
deleted file mode 100644
index 70163a5..0000000
--- a/old-school/mdadm-dup.sh
+++ /dev/null
@@ -1,217 +0,0 @@
-LoSetup()
-{
-    local losetup_binary="$(which LoSetup)"
-    if [ "$losetup_binary" ]; then
-        "$losetup_binary" "$@"
-    else
-        losetup "$@"
-    fi
-}
-
-dm_snapshot()
-{
-    # TODO: eliminate duplication; this function exists elsewhere in a less generalized form
-    local ro_file rw_file cutoff_size
-    ro_file=$1
-    rw_file=$2
-    cutoff_size=$3
-
-    local ro_dev rw_dev size new_dev_name persist chunksize
-
-    if [ -b "$ro_file" ];
-    then ro_dev=$ro_file
-    else ro_dev=$(LoSetup -r -f --show "$ro_file") || return
-    fi
-
-    if [ -b "$rw_file" ];
-    then rw_dev=$rw_file
-    else rw_dev=$(LoSetup -f --show "$rw_file") || return
-    fi
-
-    if [ "$cutoff_size" -a "$cutoff_size" -gt 0 ]; then
-        size=$cutoff_size
-    else
-        size=$(blockdev --getsz "$ro_dev") || return
-    fi
-
-    new_dev_name=${ro_dev##*/}
-    persist=p
-    chunksize=16
-    dmsetup create "$new_dev_name" --table "0 $size snapshot $ro_dev $rw_dev $persist $chunksize" || return
-    wait_for_dm_device /dev/mapper/"$new_dev_name"
-    echo /dev/mapper/"$new_dev_name"
-}
-
-dm_snapshot_teardown()
-{
-    local dev="$1"
-    case "$dev" in
-        /dev/dm-*)
-            dmsetup table "$dev" | (
-                read _ _ snapshot ro_dev rw_dev _ crypt_dev _
-                case "$snapshot" in
-                    snapshot)
-                        dmsetup remove "$dev"           || exit 1
-                        # errors ignored because the loop dev can be configured to be
-                        # automatically removed upon disuse
-                        losetup -d /dev/block/"$rw_dev" || true
-                        eject /dev/block/"$ro_dev"      || true
-                        ;;
-                    crypt)
-                        cryptsetup remove "$dev" || exit 1
-                        losetup -d /dev/block/"$crypt_dev" || true
-                        ;;
-                esac
-            ) || return
-            ;;
-        *) return 1 ;;
-    esac
-}
-
-wait_for_dm_device()
-{
-    # TODO: improve
-    while ! [ -e "$1" ]; do
-        sleep 1
-    done
-}
-
-dup_mount_cdrom()
-{
-    local cdrom_dev="$1" mountpoint="$2"
-
-    local sectors md_dev=/dev/md55 cdrom_rw_file=/"${cdrom_dev##*/}".rw
-
-    sectors=$(get_cdrom_sizelimit "$cdrom_dev") || return
-
-    # TODO: do we even need this backing file? We do need to trick mdadm into
-    # thinking that this is a RW device, but previously we got away with just
-    # creating a loopback device.
-    dd if=/dev/zero of="$cdrom_rw_file" bs=1K count=32 || return
-    cdrom_rw_dev=$(dm_snapshot "$cdrom_dev" "$cdrom_rw_file" "$sectors") || return
-    mdadm_dup "$cdrom_rw_dev" "$md_dev" "$sectors" || return
-    mount -t iso9660 -r $md_dev "$mountpoint"
-}
-
-get_cdrom_sizelimit()
-{
-    # returns 512-byte sectors
-    local dev="$1" sectors
-    sectors=$(blockdev --getsz "$dev") || return
-
-    # Check if we can read the last 8 sectors. With a TAO CDROM, we can't --
-    # these sectors are faux, and not part of the ISO fs. If mdadm is allowed to
-    # read them, it will mark the device failed.
-    if dd count=2 if="$dev" bs=2048 skip=$((sectors/4 - 2)) of=/dev/null 2>/dev/null; then
-        echo $sectors
-    else
-        echo $((sectors - 8))
-    fi
-}
-
-mdadm_dup()
-{
-    local input_dev="$1" md_name="$2" sectors="$3"
-
-    mdadm --build "$md_name" "${sectors:+--size=$((sectors / 2))}" \
-          --level=1 --raid-devices=1 --force --write-mostly "$input_dev" || return
-}
-
-mdadm_subdevices()
-{
-    local md_dev="$1"
-    mdadm -D "$md_dev" -Y | sed -ne 's/^MD_DEVICE_.*_DEV=//p'
-}
-
-cryptsetup_temp()
-{
-    local sectors="$1" cryptname="$2" temp_file="$3" parms=$- secret
-    set +x
-    # Add 4096 sectors for LUKS header
-    truncate -s $(((sectors + 4096) * 512)) "$temp_file" || return
-    cleartext_dev=$(LoSetup -f --show "$temp_file")      || return
-    secret="$(head -c256 /dev/urandom)"                  || return
-    printf %s "$secret" |
-        cryptsetup luksFormat "$cleartext_dev" - || return
-    printf %s "$secret" |
-        cryptsetup --key-file - luksOpen "$cleartext_dev" "$cryptname" || return
-    unset secret
-    set "$parms"
-
-    wait_for_dm_device /dev/mapper/"$cryptname"
-    rm "$temp_file"
-    echo /dev/mapper/"$cryptname"
-}
-
-mdadm_copy_eject_crypt()
-{
-    local md_dev="$1" temp_file="$2"
-
-    [ -b "$md_dev" ]                                  || return
-
-    local output_dev sectors
-
-    old_subdev=$(mdadm_subdevices "$md_dev"|head -n1) || return
-    [ -b "$old_subdev" ]                              || return
-    # TODO: truncate to the ISO fs size if the device is larger
-    sectors=$(blockdev --getsz "$md_dev")             || return
-
-    output_dev=$(cryptsetup_temp "$sectors" samizdatiso "$temp_file") || return
-
-    mdadm "$md_dev" --add "$output_dev"               || return
-    mdadm "$md_dev" --grow -n2                        || return
-
-    mdadm_wait_remove "$md_dev" "$old_subdev"         || return
-
-    mdadm "$md_dev" --grow -n1 --force                || return
-    dm_snapshot_teardown "$old_subdev"
-}
-
-mdadm_copy_eject()
-{
-    local md_dev="$1" output_file="$2"
-
-    [ -b "$md_dev" ]                                  || return
-    [ ! -e "$output_file" ]                           || return
-
-    local output_dev sectors
-
-    old_subdev=$(mdadm_subdevices "$md_dev"|head -n1) || return
-    [ -b "$old_subdev" ]                              || return
-    sectors=$(blockdev --getsz "$md_dev")             || return
-
-    truncate -s $((sectors * 512)) "$output_file"     || return
-    output_dev=$(LoSetup -f --show "$output_file")    || return
-
-    mdadm "$md_dev" --add "$output_dev"               || return
-    mdadm "$md_dev" --grow -n2                        || return
-
-    mdadm_wait_remove "$md_dev" "$old_subdev"         || return
-
-    mdadm "$md_dev" --grow -n1 --force                || return
-    dm_snapshot_teardown "$old_subdev"
-}
-
-mdadm_wait_remove()
-{
-    # We should perhaps use mdadm --monitor's RebuildFinished event.
-
-    local dev="$1" disk="$2" tries
-    if ! mdadm --wait "$dev"; then
-        tries=1000
-        while ! mdadm --detail --test "$dev"; do
-            [ $tries -gt 0 ] || return 1
-            sleep 1
-            tries=$((tries-1))
-        done
-    fi
-
-    mdadm "$dev" --fail "$disk" || return 1
-    tries=100
-    while ! mdadm "$dev" --remove "$disk"; do
-        [ $tries -gt 0 ] || return 1
-        sleep 1
-        tries=$((tries-1))
-    done
-    return 0
-}