Move DataBlock out of manager.rs

This commit is contained in:
Alex 2022-03-15 12:12:12 +01:00
parent c1d9854d2c
commit c3982a90b6
Signed by untrusted user: lx
GPG key ID: 0E496D15096376BE
4 changed files with 86 additions and 81 deletions

81
src/block/block.rs Normal file
View file

@ -0,0 +1,81 @@
use serde::{Deserialize, Serialize};
use zstd::stream::{decode_all as zstd_decode, Encoder};
use garage_util::data::*;
use garage_util::error::*;
/// A possibly compressed block of data
#[derive(Debug, Serialize, Deserialize)]
pub enum DataBlock {
/// Uncompressed data
Plain(#[serde(with = "serde_bytes")] Vec<u8>),
/// Data compressed with zstd
Compressed(#[serde(with = "serde_bytes")] Vec<u8>),
}
impl DataBlock {
/// Query whether this block is compressed
pub fn is_compressed(&self) -> bool {
matches!(self, DataBlock::Compressed(_))
}
/// Get the inner, possibly compressed buffer. You should probably use [`DataBlock::verify_get`]
/// instead
pub fn inner_buffer(&self) -> &[u8] {
use DataBlock::*;
let (Plain(ref res) | Compressed(ref res)) = self;
res
}
/// Get the buffer, possibly decompressing it, and verify it's integrity.
/// For Plain block, data is compared to hash, for Compressed block, zstd checksumming system
/// is used instead.
pub fn verify_get(self, hash: Hash) -> Result<Vec<u8>, Error> {
match self {
DataBlock::Plain(data) => {
if blake2sum(&data) == hash {
Ok(data)
} else {
Err(Error::CorruptData(hash))
}
}
DataBlock::Compressed(data) => {
zstd_decode(&data[..]).map_err(|_| Error::CorruptData(hash))
}
}
}
/// Verify data integrity. Allocate less than [`DataBlock::verify_get`] and don't consume self, but
/// does not return the buffer content.
pub fn verify(&self, hash: Hash) -> Result<(), Error> {
match self {
DataBlock::Plain(data) => {
if blake2sum(data) == hash {
Ok(())
} else {
Err(Error::CorruptData(hash))
}
}
DataBlock::Compressed(data) => zstd::stream::copy_decode(&data[..], std::io::sink())
.map_err(|_| Error::CorruptData(hash)),
}
}
pub fn from_buffer(data: Vec<u8>, level: Option<i32>) -> DataBlock {
if let Some(level) = level {
if let Ok(data) = zstd_encode(&data[..], level) {
return DataBlock::Compressed(data);
}
}
DataBlock::Plain(data)
}
}
fn zstd_encode<R: std::io::Read>(mut source: R, level: i32) -> std::io::Result<Vec<u8>> {
let mut result = Vec::<u8>::new();
let mut encoder = Encoder::new(&mut result, level)?;
encoder.include_checksum(true)?;
std::io::copy(&mut source, &mut encoder)?;
encoder.finish()?;
Ok(result)
}

View file

@ -3,4 +3,5 @@ extern crate tracing;
pub mod manager;
mod block;
mod metrics;

View file

@ -5,7 +5,6 @@ use std::time::Duration;
use async_trait::async_trait;
use serde::{Deserialize, Serialize};
use zstd::stream::{decode_all as zstd_decode, Encoder};
use futures::future::*;
use futures::select;
@ -31,6 +30,7 @@ use garage_rpc::*;
use garage_table::replication::{TableReplication, TableShardedReplication};
use crate::metrics::*;
use crate::block::*;
/// Size under which data will be stored inlined in database instead of as files
pub const INLINE_THRESHOLD: usize = 3072;
@ -71,73 +71,6 @@ pub enum BlockRpc {
NeedBlockReply(bool),
}
/// A possibly compressed block of data
#[derive(Debug, Serialize, Deserialize)]
pub enum DataBlock {
/// Uncompressed data
Plain(#[serde(with = "serde_bytes")] Vec<u8>),
/// Data compressed with zstd
Compressed(#[serde(with = "serde_bytes")] Vec<u8>),
}
impl DataBlock {
/// Query whether this block is compressed
pub fn is_compressed(&self) -> bool {
matches!(self, DataBlock::Compressed(_))
}
/// Get the inner, possibly compressed buffer. You should probably use [`DataBlock::verify_get`]
/// instead
pub fn inner_buffer(&self) -> &[u8] {
use DataBlock::*;
let (Plain(ref res) | Compressed(ref res)) = self;
res
}
/// Get the buffer, possibly decompressing it, and verify it's integrity.
/// For Plain block, data is compared to hash, for Compressed block, zstd checksumming system
/// is used instead.
pub fn verify_get(self, hash: Hash) -> Result<Vec<u8>, Error> {
match self {
DataBlock::Plain(data) => {
if blake2sum(&data) == hash {
Ok(data)
} else {
Err(Error::CorruptData(hash))
}
}
DataBlock::Compressed(data) => {
zstd_decode(&data[..]).map_err(|_| Error::CorruptData(hash))
}
}
}
/// Verify data integrity. Allocate less than [`DataBlock::verify_get`] and don't consume self, but
/// does not return the buffer content.
pub fn verify(&self, hash: Hash) -> Result<(), Error> {
match self {
DataBlock::Plain(data) => {
if blake2sum(data) == hash {
Ok(())
} else {
Err(Error::CorruptData(hash))
}
}
DataBlock::Compressed(data) => zstd::stream::copy_decode(&data[..], std::io::sink())
.map_err(|_| Error::CorruptData(hash)),
}
}
pub fn from_buffer(data: Vec<u8>, level: Option<i32>) -> DataBlock {
if let Some(level) = level {
if let Ok(data) = zstd_encode(&data[..], level) {
return DataBlock::Compressed(data);
}
}
DataBlock::Plain(data)
}
}
impl Rpc for BlockRpc {
type Response = Result<BlockRpc, Error>;
}
@ -215,6 +148,8 @@ impl BlockManager {
});
block_manager.endpoint.set_handler(block_manager.clone());
block_manager.clone().spawn_background_worker();
block_manager
}
@ -494,7 +429,7 @@ impl BlockManager {
// ---- Resync loop ----
pub fn spawn_background_worker(self: Arc<Self>) {
fn spawn_background_worker(self: Arc<Self>) {
// Launch a background workers for background resync loop processing
let background = self.system.background.clone();
tokio::spawn(async move {
@ -1080,12 +1015,3 @@ impl ErrorCounter {
self.last_try + self.delay_msec()
}
}
fn zstd_encode<R: std::io::Read>(mut source: R, level: i32) -> std::io::Result<Vec<u8>> {
let mut result = Vec::<u8>::new();
let mut encoder = Encoder::new(&mut result, level)?;
encoder.include_checksum(true)?;
std::io::copy(&mut source, &mut encoder)?;
encoder.finish()?;
Ok(result)
}

View file

@ -153,9 +153,6 @@ impl Garage {
block_ref_table,
});
info!("Start block manager background thread...");
garage.block_manager.clone().spawn_background_worker();
garage
}