Test for ZFS corruption

gistfile1.txt

#!/usr/bin/env bash

# Invocation:	zfs list -H -o mountpoint | grep -v -e legacy -e none | xargs -I{} find "{}" -xdev -type f | \
# 		parallel -j 8 'zfs_corruption_detector "{}" 2>/dev/null | grep ERR' > report.txt

set -euf -o pipefail
#set -x

print_err() {
	printf "%s\n" "$*" 1>&2
}

find_corruption() {
	local file_name="$1"
	local record_size="$2"

	python3 -c "data = open('$file_name','rb').read($record_size); print('ERR: $file_name: Possible corruption.\n' if len(data) and data == b'\x00'*len(data) else 'INFO: $file_name: OK\n', end='')"
}

run_loop() {

	for file in "$@"; do
		local file_name=""
		local record_size=""
		local zfs_mount=""

		file_name="$( readlink -e "$file" 2>/dev/null )"

		if [[ -z "$file_name" ]]; then
			print_err "WARN: $file_name: File name is empty!  Quitting."
			continue
		fi

		if [[ ! -r "$file_name" ]]; then
			print_err "WARN: $file_name: File name is not readable!  Quitting."
			continue
		fi

		zfs_mount="$( zfs list -H -o mountpoint "$file_name" 2>/dev/null )"

		if [[ -z "$zfs_mount" ]]; then
			print_err "WARN: $file_name: Mount name is empty!  Quitting."
			continue
		fi

		record_size="$( zfs get recordsize -Hp -o value "$zfs_mount" 2>/dev/null )"

		if [[ -z "$record_size" ]];then
			print_err "WARN: $file_name: Record size is empty!  Quitting."
			continue
		fi

		find_corruption "$file_name" "$record_size"
	done
}

run_loop $@