tyler/proxmox-backup
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src/backup/index.rs: add compute_csum

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And use it for fixed and dynamic index. Please note that this
changes checksums for fixed indexes, so restore older backups
will fails now (not backward compatible).
This commit is contained in:
Dietmar Maurer
2020-06-26 09:00:34 +02:00
parent 19b5c3c43e
commit 1f82f9b7b5
3 changed files with 15 additions and 42 deletions
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24
src/backup/fixed_index.rs
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@ -1,5 +1,4 @@
use anyhow::{bail, format_err, Error};
use std::convert::TryInto;
use std::io::{Seek, SeekFrom};
use super::chunk_stat::*;
@ -147,15 +146,6 @@ impl FixedIndexReader {
Ok(())
}
#[inline]
fn chunk_digest(&self, pos: usize) -> &[u8; 32] {
if pos >= self.index_length {
panic!("chunk index out of range");
}
let slice = unsafe { std::slice::from_raw_parts(self.index.add(pos * 32), 32) };
slice.try_into().unwrap()
}
#[inline]
fn chunk_end(&self, pos: usize) -> u64 {
if pos >= self.index_length {
@ -170,20 +160,6 @@ impl FixedIndexReader {
}
}
/// Compute checksum and data size
pub fn compute_csum(&self) -> ([u8; 32], u64) {
let mut csum = openssl::sha::Sha256::new();
let mut chunk_end = 0;
for pos in 0..self.index_length {
chunk_end = self.chunk_end(pos);
let digest = self.chunk_digest(pos);
csum.update(digest);
}
let csum = csum.finish();
(csum, chunk_end)
}
pub fn print_info(&self) {
println!("Size: {}", self.size);
println!("ChunkSize: {}", self.chunk_size);