152 lines
4.1 KiB
Rust
152 lines
4.1 KiB
Rust
use std::fs::{File, OpenOptions};
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use std::io::{BufWriter, Read, Seek, SeekFrom, Write};
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use std::ptr::read;
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use crate::mapping::{Cluster, Domain, MapFile, Stage};
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use crate::Args;
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#[derive(Debug)]
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#[allow(dead_code)]
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pub struct Recover {
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/// Buffer capacity in bytes.
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buf_capacity: u64,
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config: Args,
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input: File,
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output: BufWriter<File>,
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map: MapFile,
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stage: Stage,
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}
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impl Recover {
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pub fn new(config: Args, input: File, output: File, map: MapFile, buf_capacity: u64) -> Self {
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let stage = map.get_stage();
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let mut r = Recover {
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buf_capacity,
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config,
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input: input,
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output: BufWriter::with_capacity(buf_capacity as usize, output),
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map,
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stage: stage,
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};
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// Ensure that buffer capacity is adjusted based on progress.
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r.set_buf_capacity();
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r
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}
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/// Recover media.
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pub fn run(&mut self) -> () {
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self.copy_untested();
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/*
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let mut is_finished = false;
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while !is_finished {
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match self.map.get_stage() {
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Stage::Untested => {
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self.copy_untested();
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}
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Stage::ForIsolation(level) => {
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self.copy_isolate(level);
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}
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Stage::Damaged => {
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println!("Cannot recover further.");
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is_finished = true
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}
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}
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}
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*/
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// return recovered_bytes
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}
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/// Attempt to copy all untested blocks.
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fn copy_untested(&mut self) -> &mut Self {
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let mut buf = vec![crate::FB_PAD_VALUE; self.buf_capacity as usize];
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// Purely caching.
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let mut read_position = 0_u64;
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let last_read_position = crate::io::get_stream_length(&mut self.input)
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.expect("Failed to get length of input stream")
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- self.buf_capacity;
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while read_position < last_read_position {
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dbg!(read_position);
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if let Err(err) = self.input.read_exact(&mut buf) {
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println!("Hit error: {:?}", err);
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self.input
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.seek_relative(self.buf_capacity as i64)
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.expect("Failed to seek input by buf_capacity to skip previous error");
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} else {
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self.output
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.write_all(buf.as_slice())
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.expect("Failed to write data to output file");
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self.map.update(Cluster {
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domain: Domain {
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start: read_position as usize,
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end: (read_position + self.buf_capacity) as usize,
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},
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stage: Stage::Intact,
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});
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}
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read_position += self.buf_capacity;
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}
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crate::mapping::map::write_map_to_file(
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OpenOptions::new()
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.create(true)
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.write(true)
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.open(crate::get_path(
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&self.config.map,
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self.config.input.to_str().unwrap(),
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"map",
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))
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.expect("Failed to open map file"),
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&self.map,
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)
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.expect("Failed to write map file");
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/*
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let mut untested: Vec<Cluster> = vec![];
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for cluster in self.map.get_clusters(Stage::Untested).iter_mut() {
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untested.append(&mut cluster.subdivide(self.map.sector_size as usize));
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}
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todo!("Read and save data.");
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*/
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self
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}
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/// Attempt to copy blocks via isolation at pass level.
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fn copy_isolate(&mut self, level: u8) -> &mut Self {
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todo!();
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self
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}
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/// Set buffer capacities as cluster length in bytes.
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/// Varies depending on the recovery stage.
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fn set_buf_capacity(&mut self) -> &mut Self {
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self.buf_capacity = self.config.sector_size as u64 * self.config.cluster_length as u64;
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self
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}
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}
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#[cfg(test)]
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#[allow(unused)]
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mod tests {
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use super::*;
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// Test for Recover::set_buf_capacity
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}
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