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#!/bin/bash
set -e
LOOP_DEVICE_MAJOR=7
LOOP_DEVICE_MIN_ID=100
echo_err() {
echo "$@" >&2
}
root_exec() {
if [[ $EUID -ne 0 ]]; then
${ROOT_EXEC_CMD:-sudo} "$@"
else
"$@"
fi
}
create_device_node() {
local -r last_id=$(find /dev/ -name 'loop[0-9]*' -printf '%f\n' | sed 's/^loop//' | sort -r -n | head -1)
local id=$((last_id + 1))
if [[ "$id" -lt "$LOOP_DEVICE_MIN_ID" ]]; then
id="$LOOP_DEVICE_MIN_ID"
fi
local path
for (( i=0; i<10; i++ )); do
path="/dev/loop$id"
if [[ ! -e "$path" ]] && root_exec mknod "$path" b "$LOOP_DEVICE_MAJOR" "$id"; then
echo "$path"
return 0
fi
$((id++))
done
return 1
}
device_mountpoint() {
local -r datadir="$1"
local -r dev="$2"
if [[ -z "$datadir" || -z "$dev" ]]; then
echo_err "Usage: device_mountpoint <data dir> <device>"
return 1
fi
echo "$datadir/mnt-$(basename "$dev")"
}
create_device() {
local -r datadir="$1"
if [[ -z "$datadir" ]]; then
echo_err "Usage: create_device <data dir>"
return 1
fi
local -r dev=$(create_device_node)
local -r fs="$datadir/$(basename "$dev").vhd"
local -r mountpoint=$(device_mountpoint "$datadir" "$dev")
echo_err
echo_err "# Device $dev"
dd if=/dev/zero of="$fs" bs=64K count=128 >/dev/null 2>&1
root_exec losetup "$dev" "$fs"
root_exec mkfs.ext4 "$dev" >/dev/null 2>&1
mkdir "$mountpoint"
root_exec mount "$dev" "$mountpoint"
echo "$dev"
}
# Unused by default, but helpful for local development
destroy_device() {
local -r datadir="$1"
local -r dev="$2"
if [[ -z "$datadir" || -z "$dev" ]]; then
echo_err "Usage: destroy_device <data dir> <device>"
return 1
fi
echo_err "Destroying device $dev"
root_exec umount $(device_mountpoint "$datadir" "$dev")
root_exec losetup -d "$dev"
root_exec rm "$dev"
}
block_device_path() {
device_name=$(basename "$1")
device_minor=${device_name/#loop}
echo "/sys/dev/block/$LOOP_DEVICE_MAJOR:$device_minor"
}
tmpdir=$(mktemp --tmpdir -d monerotest.XXXXXXXX)
echo_err "Creating devices using temporary directory: $tmpdir"
dev_rot=$(create_device "$tmpdir")
bdev_rot=$(block_device_path "$dev_rot")
echo 1 | root_exec tee "$bdev_rot/queue/rotational" >/dev/null
echo MONERO_TEST_DEVICE_HDD=$(device_mountpoint "$tmpdir" "$dev_rot")
dev_ssd=$(create_device "$tmpdir")
bdev_ssd=$(block_device_path "$dev_ssd")
echo 0 | root_exec tee "$bdev_ssd/queue/rotational" >/dev/null
echo MONERO_TEST_DEVICE_SSD=$(device_mountpoint "$tmpdir" "$dev_ssd")
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