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Code Issues Releases Wiki Activity

Detach bundle upload

pull/10/head
Dennis Schwerdel 2017-04-10 08:53:55 +02:00
parent cca4e76c3b
commit 77e396094a
10 changed files with 121 additions and 111 deletions
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7
Cargo.lock generated
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@ -7,6 +7,7 @@ dependencies = [
"byteorder 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)",
"chrono 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"clap 2.23.1 (registry+https://github.com/rust-lang/crates.io-index)",
"crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)",
"filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)",
"fuse 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
"lazy_static 0.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
@ -105,6 +106,11 @@ name = "constant_time_eq"
version = "0.1.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "crossbeam"
version = "0.2.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "filetime"
version = "0.1.10"
@ -466,6 +472,7 @@ dependencies = [
"checksum chrono 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "158b0bd7d75cbb6bf9c25967a48a2e9f77da95876b858eadfabaa99cd069de6e"
"checksum clap 2.23.1 (registry+https://github.com/rust-lang/crates.io-index)" = "d480c39a2e5f9b3a3798c661613e1b0e7a7ae71e005102d4aa910fc3289df484"
"checksum constant_time_eq 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "07dcb7959f0f6f1cf662f9a7ff389bcb919924d99ac41cf31f10d611d8721323"
"checksum crossbeam 0.2.10 (registry+https://github.com/rust-lang/crates.io-index)" = "0c5ea215664ca264da8a9d9c3be80d2eaf30923c259d03e870388eb927508f97"
"checksum filetime 0.1.10 (registry+https://github.com/rust-lang/crates.io-index)" = "5363ab8e4139b8568a6237db5248646e5a8a2f89bd5ccb02092182b11fd3e922"
"checksum fuse 0.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "5087262ce5b36fed6ccd4abf0a8224e48d055a2bb07fecb5605765de6f114a28"
"checksum kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "7507624b29483431c0ba2d82aece8ca6cdba9382bff4ddd0f7490560c056098d"

1
Cargo.toml
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@ -28,6 +28,7 @@ lazy_static = "0.2"
rand = "0.3"
tar = "0.4"
xattr = "0.1"
crossbeam = "0.2"
time = "*"
libc = "*"

1
TODO.md
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@ -1,7 +1,6 @@
# TODO
## Functionality
* Detach bundle upload
* XAttrs in fuse
* XAttrs in tar
* `check --repair`

11
src/bundledb/cache.rs
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@ -62,17 +62,6 @@ impl StoredBundle {
self.info.id.clone()
}
pub fn move_to<P: AsRef<Path>>(mut self, base_path: &Path, path: P) -> Result<Self, BundleDbError> {
let src_path = base_path.join(&self.path);
let dst_path = path.as_ref();
if fs::rename(&src_path, dst_path).is_err() {
try!(fs::copy(&src_path, dst_path).context(dst_path));
try!(fs::remove_file(&src_path).context(&src_path as &Path));
}
self.path = dst_path.strip_prefix(base_path).unwrap().to_path_buf();
Ok(self)
}
pub fn copy_to<P: AsRef<Path>>(&self, base_path: &Path, path: P) -> Result<Self, BundleDbError> {
let src_path = base_path.join(&self.path);
let dst_path = path.as_ref();

25
src/bundledb/db.rs
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@ -6,6 +6,7 @@ use std::collections::{HashMap, HashSet};
use std::fs;
use std::sync::{Arc, Mutex};
use std::io;
use std::mem;
quick_error!{
@ -97,6 +98,7 @@ pub fn load_bundles(path: &Path, base: &Path, bundles: &mut HashMap<BundleId, St
pub struct BundleDb {
pub layout: RepositoryLayout,
uploader: Option<Arc<BundleUploader>>,
crypto: Arc<Mutex<Crypto>>,
local_bundles: HashMap<BundleId, StoredBundle>,
remote_bundles: HashMap<BundleId, StoredBundle>,
@ -109,6 +111,7 @@ impl BundleDb {
BundleDb {
layout: layout,
crypto: crypto,
uploader: None,
local_bundles: HashMap::new(),
remote_bundles: HashMap::new(),
bundle_cache: LruCache::new(5, 10)
@ -230,17 +233,33 @@ impl BundleDb {
#[inline]
pub fn add_bundle(&mut self, bundle: BundleWriter) -> Result<BundleInfo, BundleDbError> {
let bundle = try!(bundle.finish(&self));
let mut bundle = try!(bundle.finish(&self));
if bundle.info.mode == BundleMode::Meta {
try!(self.copy_remote_bundle_to_cache(&bundle))
}
let (folder, filename) = self.layout.remote_bundle_path(self.remote_bundles.len());
try!(fs::create_dir_all(&folder).context(&folder as &Path));
let bundle = try!(bundle.move_to(&self.layout.base_path(), folder.join(filename)));
let dst_path = folder.join(filename);
let src_path = bundle.path;
bundle.path = dst_path.clone();
if self.uploader.is_none() {
self.uploader = Some(BundleUploader::new(5));
}
try!(self.uploader.as_ref().unwrap().queue(src_path, dst_path));
self.remote_bundles.insert(bundle.id(), bundle.clone());
Ok(bundle.info)
}
#[inline]
pub fn finish_uploads(&mut self) -> Result<(), BundleDbError> {
let mut uploader = None;
mem::swap(&mut self.uploader, &mut uploader);
if let Some(uploader) = uploader {
uploader.finish()
} else {
Ok(())
}
}
#[inline]
pub fn get_chunk_list(&self, bundle: &BundleId) -> Result<ChunkList, BundleDbError> {
let mut bundle = try!(self.get_stored_bundle(bundle).and_then(|stored| self.get_bundle(&stored)));

96
src/bundledb/error.rs
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@ -1,96 +0,0 @@
use ::prelude::*;
use super::*;
use std::path::{Path, PathBuf};
use std::io;
quick_error!{
#[derive(Debug)]
pub enum BundleDbError {
List(err: io::Error) {
cause(err)
description("Failed to list bundles")
display("Failed to list bundles: {}", err)
}
Io(err: io::Error, path: PathBuf) {
cause(err)
context(path: &'a Path, err: io::Error) -> (err, path.to_path_buf())
description("Failed to read/write bundle")
display("Failed to read/write bundle {:?}: {}", path, err)
}
Decode(err: msgpack::DecodeError, path: PathBuf) {
cause(err)
context(path: &'a Path, err: msgpack::DecodeError) -> (err, path.to_path_buf())
description("Failed to decode bundle header")
display("Failed to decode bundle header of {:?}: {}", path, err)
}
Encode(err: msgpack::EncodeError, path: PathBuf) {
cause(err)
context(path: &'a Path, err: msgpack::EncodeError) -> (err, path.to_path_buf())
description("Failed to encode bundle header")
display("Failed to encode bundle header of {:?}: {}", path, err)
}
WrongHeader(path: PathBuf) {
description("Wrong header")
display("Wrong header on bundle {:?}", path)
}
WrongVersion(path: PathBuf, version: u8) {
description("Wrong version")
display("Wrong version on bundle {:?}: {}", path, version)
}
Integrity(bundle: BundleId, reason: &'static str) {
description("Bundle has an integrity error")
display("Bundle {:?} has an integrity error: {}", bundle, reason)
}
NoSuchBundle(bundle: BundleId) {
description("No such bundle")
display("No such bundle: {:?}", bundle)
}
NoSuchChunk(bundle: BundleId, id: usize) {
description("Bundle has no such chunk")
display("Bundle {:?} has no chunk with that id: {}", bundle, id)
}
Decompression(err: CompressionError, path: PathBuf) {
cause(err)
context(path: &'a Path, err: CompressionError) -> (err, path.to_path_buf())
description("Decompression failed")
display("Decompression failed on bundle {:?}: {}", path, err)
}
Compression(err: CompressionError) {
from()
cause(err)
description("Compression failed")
display("Compression failed: {}", err)
}
Decryption(err: EncryptionError, path: PathBuf) {
cause(err)
context(path: &'a Path, err: EncryptionError) -> (err, path.to_path_buf())
description("Decryption failed")
display("Decryption failed on bundle {:?}: {}", path, err)
}
Encryption(err: EncryptionError) {
from()
cause(err)
description("Encryption failed")
display("Encryption failed: {}", err)
}
Remove(err: io::Error, bundle: BundleId) {
cause(err)
description("Failed to remove bundle")
display("Failed to remove bundle {}", bundle)
}
Writer(err: BundleWriterError) {
from()
cause(err)
description("Failed to write new bundle")
display("Bundle db error: failed to write new bundle\n\tcaused by: {}", err)
}
Reader(err: BundleReaderError) {
from()
cause(err)
description("Failed to read bundle")
display("Bundle db error: failed to read a bundle\n\tcaused by: {}", err)
}
}
}

2
src/bundledb/mod.rs
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@ -2,11 +2,13 @@ mod writer;
mod reader;
mod db;
mod cache;
mod uploader;
pub use self::cache::{StoredBundle, BundleCacheError};
pub use self::writer::{BundleWriter, BundleWriterError};
pub use self::reader::{BundleReader, BundleReaderError};
pub use self::db::*;
pub use self::uploader::BundleUploader;
use ::prelude::*;

87
src/bundledb/uploader.rs Normal file
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@ -0,0 +1,87 @@
use ::prelude::*;
use std::sync::atomic::{Ordering, AtomicBool, AtomicUsize};
use std::sync::{Mutex, Condvar, Arc};
use std::{mem, fs, thread};
use std::path::{Path, PathBuf};
use crossbeam::sync::MsQueue;
pub struct BundleUploader {
capacity: usize,
error_present: AtomicBool,
error: Mutex<Option<BundleDbError>>,
waiting: AtomicUsize,
queue: MsQueue<Option<(PathBuf, PathBuf)>>,
wait: (Condvar, Mutex<()>)
}
impl BundleUploader {
pub fn new(capacity: usize) -> Arc<Self> {
let self_ = Arc::new(BundleUploader {
capacity: capacity,
error_present: AtomicBool::new(false),
error: Mutex::new(None),
waiting: AtomicUsize::new(0),
queue: MsQueue::new(),
wait: (Condvar::new(), Mutex::new(()))
});
let self2 = self_.clone();
thread::Builder::new().name("uploader".to_string()).spawn(move || self2.worker_thread()).unwrap();
self_
}
fn get_status(&self) -> Result<(), BundleDbError> {
if self.error_present.load(Ordering::SeqCst) {
let mut error = None;
mem::swap(&mut error, &mut self.error.lock().unwrap());
Err(error.unwrap())
} else {
Ok(())
}
}
pub fn queue(&self, local_path: PathBuf, remote_path: PathBuf) -> Result<(), BundleDbError> {
while self.waiting.load(Ordering::SeqCst) >= self.capacity {
let _ = self.wait.0.wait(self.wait.1.lock().unwrap()).unwrap();
}
if !self.error_present.load(Ordering::SeqCst) {
self.waiting.fetch_add(1, Ordering::SeqCst);
self.queue.push(Some((local_path, remote_path)));
}
self.get_status()
}
pub fn finish(&self) -> Result<(), BundleDbError> {
if !self.error_present.load(Ordering::SeqCst) {
self.waiting.fetch_add(1, Ordering::SeqCst);
self.queue.push(None);
}
while self.waiting.load(Ordering::SeqCst) > 0 {
let _ = self.wait.0.wait(self.wait.1.lock().unwrap());
}
self.get_status()
}
fn worker_thread_inner(&self) -> Result<(), BundleDbError> {
while let Some((src_path, dst_path)) = self.queue.pop() {
let folder = dst_path.parent().unwrap();
try!(fs::create_dir_all(&folder).context(&folder as &Path));
if fs::rename(&src_path, &dst_path).is_err() {
try!(fs::copy(&src_path, &dst_path).context(&dst_path as &Path));
try!(fs::remove_file(&src_path).context(&src_path as &Path));
}
}
Ok(())
}
fn worker_thread(&self) {
if let Err(err) = self.worker_thread_inner() {
*self.error.lock().unwrap() = Some(err);
self.error_present.store(true, Ordering::SeqCst);
}
self.waiting.swap(0, Ordering::SeqCst);
self.wait.0.notify_all();
}
}

1
src/main.rs
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@ -23,6 +23,7 @@ extern crate fuse;
extern crate rand;
extern crate time;
extern crate xattr;
extern crate crossbeam;
extern crate libc;
extern crate tar;

1
src/repository/mod.rs
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@ -208,6 +208,7 @@ impl Repository {
}
self.next_meta_bundle = self.next_free_bundle_id()
}
try!(self.bundles.finish_uploads());
try!(self.save_bundle_map());
try!(self.bundles.save_cache());
Ok(())