forked from Deuxfleurs/garage
63 lines
1.4 KiB
Rust
63 lines
1.4 KiB
Rust
use async_trait::async_trait;
|
|
use serde::{Deserialize, Serialize};
|
|
use std::sync::Arc;
|
|
use tokio::sync::RwLock;
|
|
|
|
use crate::data::*;
|
|
use crate::server::Garage;
|
|
use crate::table::*;
|
|
|
|
#[derive(PartialEq, Clone, Debug, Serialize, Deserialize)]
|
|
pub struct BlockRef {
|
|
// Primary key
|
|
pub block: Hash,
|
|
|
|
// Sort key
|
|
pub version: UUID,
|
|
|
|
// Keep track of deleted status
|
|
pub deleted: bool,
|
|
}
|
|
|
|
impl Entry<Hash, UUID> for BlockRef {
|
|
fn partition_key(&self) -> &Hash {
|
|
&self.block
|
|
}
|
|
fn sort_key(&self) -> &UUID {
|
|
&self.version
|
|
}
|
|
|
|
fn merge(&mut self, other: &Self) {
|
|
if other.deleted {
|
|
self.deleted = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
pub struct BlockRefTable {
|
|
pub garage: RwLock<Option<Arc<Garage>>>,
|
|
}
|
|
|
|
#[async_trait]
|
|
impl TableFormat for BlockRefTable {
|
|
type P = Hash;
|
|
type S = UUID;
|
|
type E = BlockRef;
|
|
|
|
async fn updated(&self, old: Option<Self::E>, new: Self::E) {
|
|
let garage = self.garage.read().await.as_ref().cloned().unwrap();
|
|
|
|
let was_before = old.map(|x| !x.deleted).unwrap_or(false);
|
|
let is_after = !new.deleted;
|
|
if is_after && !was_before {
|
|
if let Err(e) = garage.block_manager.block_incref(&new.block) {
|
|
eprintln!("Failed to incref block {:?}: {}", &new.block, e);
|
|
}
|
|
}
|
|
if was_before && !is_after {
|
|
if let Err(e) = garage.block_manager.block_decref(&new.block, &garage.background) {
|
|
eprintln!("Failed to decref or delete block {:?}: {}", &new.block, e);
|
|
}
|
|
}
|
|
}
|
|
}
|