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-rw-r--r--src/block.rs500
1 files changed, 0 insertions, 500 deletions
diff --git a/src/block.rs b/src/block.rs
deleted file mode 100644
index 23222a7f..00000000
--- a/src/block.rs
+++ /dev/null
@@ -1,500 +0,0 @@
-use std::path::PathBuf;
-use std::sync::Arc;
-use std::time::Duration;
-
-use arc_swap::ArcSwapOption;
-use futures::future::*;
-use futures::select;
-use futures::stream::*;
-use serde::{Deserialize, Serialize};
-use tokio::fs;
-use tokio::prelude::*;
-use tokio::sync::{watch, Mutex, Notify};
-
-use crate::data;
-use crate::data::*;
-use crate::error::Error;
-use crate::membership::System;
-use crate::rpc_client::*;
-use crate::rpc_server::*;
-
-use crate::block_ref_table::*;
-use crate::server::Garage;
-
-pub const INLINE_THRESHOLD: usize = 3072;
-
-const BLOCK_RW_TIMEOUT: Duration = Duration::from_secs(42);
-const NEED_BLOCK_QUERY_TIMEOUT: Duration = Duration::from_secs(5);
-const RESYNC_RETRY_TIMEOUT: Duration = Duration::from_secs(10);
-
-#[derive(Debug, Serialize, Deserialize)]
-pub enum Message {
- Ok,
- GetBlock(Hash),
- PutBlock(PutBlockMessage),
- NeedBlockQuery(Hash),
- NeedBlockReply(bool),
-}
-
-#[derive(Debug, Serialize, Deserialize)]
-pub struct PutBlockMessage {
- pub hash: Hash,
-
- #[serde(with = "serde_bytes")]
- pub data: Vec<u8>,
-}
-
-impl RpcMessage for Message {}
-
-pub struct BlockManager {
- pub data_dir: PathBuf,
- pub data_dir_lock: Mutex<()>,
-
- pub rc: sled::Tree,
-
- pub resync_queue: sled::Tree,
- pub resync_notify: Notify,
-
- pub system: Arc<System>,
- rpc_client: Arc<RpcClient<Message>>,
- pub garage: ArcSwapOption<Garage>,
-}
-
-impl BlockManager {
- pub fn new(
- db: &sled::Db,
- data_dir: PathBuf,
- system: Arc<System>,
- rpc_server: &mut RpcServer,
- ) -> Arc<Self> {
- let rc = db
- .open_tree("block_local_rc")
- .expect("Unable to open block_local_rc tree");
- rc.set_merge_operator(rc_merge);
-
- let resync_queue = db
- .open_tree("block_local_resync_queue")
- .expect("Unable to open block_local_resync_queue tree");
-
- let rpc_path = "block_manager";
- let rpc_client = system.rpc_client::<Message>(rpc_path);
-
- let block_manager = Arc::new(Self {
- data_dir,
- data_dir_lock: Mutex::new(()),
- rc,
- resync_queue,
- resync_notify: Notify::new(),
- system,
- rpc_client,
- garage: ArcSwapOption::from(None),
- });
- block_manager
- .clone()
- .register_handler(rpc_server, rpc_path.into());
- block_manager
- }
-
- fn register_handler(self: Arc<Self>, rpc_server: &mut RpcServer, path: String) {
- let self2 = self.clone();
- rpc_server.add_handler::<Message, _, _>(path, move |msg, _addr| {
- let self2 = self2.clone();
- async move { self2.handle(&msg).await }
- });
-
- let self2 = self.clone();
- self.rpc_client
- .set_local_handler(self.system.id, move |msg| {
- let self2 = self2.clone();
- async move { self2.handle(&msg).await }
- });
- }
-
- async fn handle(self: Arc<Self>, msg: &Message) -> Result<Message, Error> {
- match msg {
- Message::PutBlock(m) => self.write_block(&m.hash, &m.data).await,
- Message::GetBlock(h) => self.read_block(h).await,
- Message::NeedBlockQuery(h) => self.need_block(h).await.map(Message::NeedBlockReply),
- _ => Err(Error::BadRequest(format!("Unexpected RPC message"))),
- }
- }
-
- pub async fn spawn_background_worker(self: Arc<Self>) {
- // Launch 2 simultaneous workers for background resync loop preprocessing
- for i in 0..2usize {
- let bm2 = self.clone();
- let background = self.system.background.clone();
- tokio::spawn(async move {
- tokio::time::delay_for(Duration::from_secs(10)).await;
- background
- .spawn_worker(format!("block resync worker {}", i), move |must_exit| {
- bm2.resync_loop(must_exit)
- })
- .await;
- });
- }
- }
-
- pub async fn write_block(&self, hash: &Hash, data: &[u8]) -> Result<Message, Error> {
- let _lock = self.data_dir_lock.lock().await;
-
- let mut path = self.block_dir(hash);
- fs::create_dir_all(&path).await?;
-
- path.push(hex::encode(hash));
- if fs::metadata(&path).await.is_ok() {
- return Ok(Message::Ok);
- }
-
- let mut f = fs::File::create(path).await?;
- f.write_all(data).await?;
- drop(f);
-
- Ok(Message::Ok)
- }
-
- pub async fn read_block(&self, hash: &Hash) -> Result<Message, Error> {
- let path = self.block_path(hash);
-
- let mut f = match fs::File::open(&path).await {
- Ok(f) => f,
- Err(e) => {
- // Not found but maybe we should have had it ??
- self.put_to_resync(hash, 0)?;
- return Err(Into::into(e));
- }
- };
- let mut data = vec![];
- f.read_to_end(&mut data).await?;
- drop(f);
-
- if data::hash(&data[..]) != *hash {
- let _lock = self.data_dir_lock.lock().await;
- warn!("Block {:?} is corrupted. Deleting and resyncing.", hash);
- fs::remove_file(path).await?;
- self.put_to_resync(&hash, 0)?;
- return Err(Error::CorruptData(*hash));
- }
-
- Ok(Message::PutBlock(PutBlockMessage { hash: *hash, data }))
- }
-
- pub async fn need_block(&self, hash: &Hash) -> Result<bool, Error> {
- let needed = self
- .rc
- .get(hash.as_ref())?
- .map(|x| u64_from_bytes(x.as_ref()) > 0)
- .unwrap_or(false);
- if needed {
- let path = self.block_path(hash);
- let exists = fs::metadata(&path).await.is_ok();
- Ok(!exists)
- } else {
- Ok(false)
- }
- }
-
- fn block_dir(&self, hash: &Hash) -> PathBuf {
- let mut path = self.data_dir.clone();
- path.push(hex::encode(&hash.as_slice()[0..1]));
- path.push(hex::encode(&hash.as_slice()[1..2]));
- path
- }
- fn block_path(&self, hash: &Hash) -> PathBuf {
- let mut path = self.block_dir(hash);
- path.push(hex::encode(hash.as_ref()));
- path
- }
-
- pub fn block_incref(&self, hash: &Hash) -> Result<(), Error> {
- let old_rc = self.rc.get(&hash)?;
- self.rc.merge(&hash, vec![1])?;
- if old_rc.map(|x| u64_from_bytes(&x[..]) == 0).unwrap_or(true) {
- self.put_to_resync(&hash, BLOCK_RW_TIMEOUT.as_millis() as u64)?;
- }
- Ok(())
- }
-
- pub fn block_decref(&self, hash: &Hash) -> Result<(), Error> {
- let new_rc = self.rc.merge(&hash, vec![0])?;
- if new_rc.map(|x| u64_from_bytes(&x[..]) == 0).unwrap_or(true) {
- self.put_to_resync(&hash, 0)?;
- }
- Ok(())
- }
-
- fn put_to_resync(&self, hash: &Hash, delay_millis: u64) -> Result<(), Error> {
- let when = now_msec() + delay_millis;
- trace!("Put resync_queue: {} {:?}", when, hash);
- let mut key = u64::to_be_bytes(when).to_vec();
- key.extend(hash.as_ref());
- self.resync_queue.insert(key, hash.as_ref())?;
- self.resync_notify.notify();
- Ok(())
- }
-
- async fn resync_loop(
- self: Arc<Self>,
- mut must_exit: watch::Receiver<bool>,
- ) -> Result<(), Error> {
- let mut n_failures = 0usize;
- while !*must_exit.borrow() {
- if let Some((time_bytes, hash_bytes)) = self.resync_queue.pop_min()? {
- let time_msec = u64_from_bytes(&time_bytes[0..8]);
- let now = now_msec();
- if now >= time_msec {
- let mut hash = [0u8; 32];
- hash.copy_from_slice(hash_bytes.as_ref());
- let hash = Hash::from(hash);
-
- if let Err(e) = self.resync_iter(&hash).await {
- warn!("Failed to resync block {:?}, retrying later: {}", hash, e);
- self.put_to_resync(&hash, RESYNC_RETRY_TIMEOUT.as_millis() as u64)?;
- n_failures += 1;
- if n_failures >= 10 {
- warn!("Too many resync failures, throttling.");
- tokio::time::delay_for(Duration::from_secs(1)).await;
- }
- } else {
- n_failures = 0;
- }
- } else {
- self.resync_queue.insert(time_bytes, hash_bytes)?;
- let delay = tokio::time::delay_for(Duration::from_millis(time_msec - now));
- select! {
- _ = delay.fuse() => (),
- _ = self.resync_notify.notified().fuse() => (),
- _ = must_exit.recv().fuse() => (),
- }
- }
- } else {
- select! {
- _ = self.resync_notify.notified().fuse() => (),
- _ = must_exit.recv().fuse() => (),
- }
- }
- }
- Ok(())
- }
-
- async fn resync_iter(&self, hash: &Hash) -> Result<(), Error> {
- let path = self.block_path(hash);
-
- let exists = fs::metadata(&path).await.is_ok();
- let needed = self
- .rc
- .get(hash.as_ref())?
- .map(|x| u64_from_bytes(x.as_ref()) > 0)
- .unwrap_or(false);
-
- if exists != needed {
- info!(
- "Resync block {:?}: exists {}, needed {}",
- hash, exists, needed
- );
- }
-
- if exists && !needed {
- let garage = self.garage.load_full().unwrap();
- let active_refs = garage
- .block_ref_table
- .get_range(&hash, None, Some(()), 1)
- .await?;
- let needed_by_others = !active_refs.is_empty();
- if needed_by_others {
- let ring = garage.system.ring.borrow().clone();
- let who = ring.walk_ring(&hash, garage.system.config.data_replication_factor);
- let msg = Arc::new(Message::NeedBlockQuery(*hash));
- let who_needs_fut = who.iter().map(|to| {
- self.rpc_client
- .call_arc(*to, msg.clone(), NEED_BLOCK_QUERY_TIMEOUT)
- });
- let who_needs = join_all(who_needs_fut).await;
-
- let mut need_nodes = vec![];
- for (node, needed) in who.into_iter().zip(who_needs.iter()) {
- match needed {
- Ok(Message::NeedBlockReply(needed)) => {
- if *needed {
- need_nodes.push(node);
- }
- }
- Err(e) => {
- return Err(Error::Message(format!(
- "Should delete block, but unable to confirm that all other nodes that need it have it: {}",
- e
- )));
- }
- Ok(_) => {
- return Err(Error::Message(format!(
- "Unexpected response to NeedBlockQuery RPC"
- )));
- }
- }
- }
-
- if need_nodes.len() > 0 {
- let put_block_message = self.read_block(hash).await?;
- self.rpc_client
- .try_call_many(
- &need_nodes[..],
- put_block_message,
- RequestStrategy::with_quorum(need_nodes.len())
- .with_timeout(BLOCK_RW_TIMEOUT),
- )
- .await?;
- }
- }
- fs::remove_file(path).await?;
- self.resync_queue.remove(&hash)?;
- }
-
- if needed && !exists {
- // TODO find a way to not do this if they are sending it to us
- // Let's suppose this isn't an issue for now with the BLOCK_RW_TIMEOUT delay
- // between the RC being incremented and this part being called.
- let block_data = self.rpc_get_block(&hash).await?;
- self.write_block(hash, &block_data[..]).await?;
- }
-
- Ok(())
- }
-
- pub async fn rpc_get_block(&self, hash: &Hash) -> Result<Vec<u8>, Error> {
- let ring = self.system.ring.borrow().clone();
- let who = ring.walk_ring(&hash, self.system.config.data_replication_factor);
- let resps = self
- .rpc_client
- .try_call_many(
- &who[..],
- Message::GetBlock(*hash),
- RequestStrategy::with_quorum(1)
- .with_timeout(BLOCK_RW_TIMEOUT)
- .interrupt_after_quorum(true),
- )
- .await?;
-
- for resp in resps {
- if let Message::PutBlock(msg) = resp {
- return Ok(msg.data);
- }
- }
- Err(Error::Message(format!(
- "Unable to read block {:?}: no valid blocks returned",
- hash
- )))
- }
-
- pub async fn rpc_put_block(&self, hash: Hash, data: Vec<u8>) -> Result<(), Error> {
- let ring = self.system.ring.borrow().clone();
- let who = ring.walk_ring(&hash, self.system.config.data_replication_factor);
- self.rpc_client
- .try_call_many(
- &who[..],
- Message::PutBlock(PutBlockMessage { hash, data }),
- RequestStrategy::with_quorum((self.system.config.data_replication_factor + 1) / 2)
- .with_timeout(BLOCK_RW_TIMEOUT),
- )
- .await?;
- Ok(())
- }
-
- pub async fn repair_data_store(&self, must_exit: &watch::Receiver<bool>) -> Result<(), Error> {
- // 1. Repair blocks from RC table
- let garage = self.garage.load_full().unwrap();
- let mut last_hash = None;
- let mut i = 0usize;
- for entry in garage.block_ref_table.store.iter() {
- let (_k, v_bytes) = entry?;
- let block_ref = rmp_serde::decode::from_read_ref::<_, BlockRef>(v_bytes.as_ref())?;
- if Some(&block_ref.block) == last_hash.as_ref() {
- continue;
- }
- if !block_ref.deleted {
- last_hash = Some(block_ref.block);
- self.put_to_resync(&block_ref.block, 0)?;
- }
- i += 1;
- if i & 0xFF == 0 && *must_exit.borrow() {
- return Ok(());
- }
- }
-
- // 2. Repair blocks actually on disk
- let mut ls_data_dir = fs::read_dir(&self.data_dir).await?;
- while let Some(data_dir_ent) = ls_data_dir.next().await {
- let data_dir_ent = data_dir_ent?;
- let dir_name = data_dir_ent.file_name();
- let dir_name = match dir_name.into_string() {
- Ok(x) => x,
- Err(_) => continue,
- };
- if dir_name.len() != 2 || hex::decode(&dir_name).is_err() {
- continue;
- }
-
- let mut ls_data_dir_2 = match fs::read_dir(data_dir_ent.path()).await {
- Err(e) => {
- warn!(
- "Warning: could not list dir {:?}: {}",
- data_dir_ent.path().to_str(),
- e
- );
- continue;
- }
- Ok(x) => x,
- };
- while let Some(file) = ls_data_dir_2.next().await {
- let file = file?;
- let file_name = file.file_name();
- let file_name = match file_name.into_string() {
- Ok(x) => x,
- Err(_) => continue,
- };
- if file_name.len() != 64 {
- continue;
- }
- let hash_bytes = match hex::decode(&file_name) {
- Ok(h) => h,
- Err(_) => continue,
- };
- let mut hash = [0u8; 32];
- hash.copy_from_slice(&hash_bytes[..]);
- self.put_to_resync(&hash.into(), 0)?;
-
- if *must_exit.borrow() {
- return Ok(());
- }
- }
- }
- Ok(())
- }
-}
-
-fn u64_from_bytes(bytes: &[u8]) -> u64 {
- assert!(bytes.len() == 8);
- let mut x8 = [0u8; 8];
- x8.copy_from_slice(bytes);
- u64::from_be_bytes(x8)
-}
-
-fn rc_merge(_key: &[u8], old: Option<&[u8]>, new: &[u8]) -> Option<Vec<u8>> {
- let old = old.map(u64_from_bytes).unwrap_or(0);
- assert!(new.len() == 1);
- let new = match new[0] {
- 0 => {
- if old > 0 {
- old - 1
- } else {
- 0
- }
- }
- 1 => old + 1,
- _ => unreachable!(),
- };
- if new == 0 {
- None
- } else {
- Some(u64::to_be_bytes(new).to_vec())
- }
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-06 17:44:56 +0000