2020-01-05 14:15:12 +00:00
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use std::collections::{HashSet, HashMap};
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2019-08-13 10:59:03 +00:00
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use std::io;
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use std::path::{Path, PathBuf};
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use std::sync::{Arc, Mutex};
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use failure::*;
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2018-12-22 16:37:25 +00:00
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use lazy_static::lazy_static;
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2020-01-22 14:04:08 +00:00
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use chrono::{DateTime, Utc};
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2018-12-17 12:00:39 +00:00
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2020-01-17 10:24:55 +00:00
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use super::backup_info::{BackupGroup, BackupDir};
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2019-08-13 10:59:03 +00:00
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use super::chunk_store::{ChunkStore, GarbageCollectionStatus};
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use super::dynamic_index::{DynamicIndexReader, DynamicIndexWriter};
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use super::fixed_index::{FixedIndexReader, FixedIndexWriter};
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2020-01-05 14:15:12 +00:00
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use super::manifest::{MANIFEST_BLOB_NAME, BackupManifest};
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2019-02-28 09:21:56 +00:00
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use super::index::*;
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2019-12-31 14:23:41 +00:00
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use super::{DataBlob, ArchiveType, archive_type};
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2019-08-13 10:59:03 +00:00
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use crate::config::datastore;
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2019-04-06 15:57:38 +00:00
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use crate::server::WorkerTask;
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2019-08-13 10:59:03 +00:00
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use crate::tools;
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2018-12-17 12:00:39 +00:00
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2019-08-13 10:59:03 +00:00
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lazy_static! {
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static ref DATASTORE_MAP: Mutex<HashMap<String, Arc<DataStore>>> = Mutex::new(HashMap::new());
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2019-03-05 06:18:12 +00:00
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}
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2019-01-18 11:01:37 +00:00
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2019-02-12 13:13:31 +00:00
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/// Datastore Management
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///
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/// A Datastore can store severals backups, and provides the
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/// management interface for backup.
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2018-12-17 12:00:39 +00:00
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pub struct DataStore {
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2019-01-15 10:38:26 +00:00
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chunk_store: Arc<ChunkStore>,
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2018-12-22 15:58:16 +00:00
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gc_mutex: Mutex<bool>,
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2019-04-11 10:04:25 +00:00
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last_gc_status: Mutex<GarbageCollectionStatus>,
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2018-12-17 12:00:39 +00:00
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}
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impl DataStore {
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2018-12-22 16:37:25 +00:00
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pub fn lookup_datastore(name: &str) -> Result<Arc<DataStore>, Error> {
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2020-01-14 11:57:03 +00:00
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let (config, _digest) = datastore::config()?;
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let config: datastore::DataStoreConfig = config.lookup("datastore", name)?;
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2018-12-22 16:37:25 +00:00
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2019-03-18 09:00:58 +00:00
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let mut map = DATASTORE_MAP.lock().unwrap();
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2018-12-22 16:37:25 +00:00
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if let Some(datastore) = map.get(name) {
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// Compare Config - if changed, create new Datastore object!
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2020-01-14 11:57:03 +00:00
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if datastore.chunk_store.base == PathBuf::from(&config.path) {
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2018-12-22 16:37:25 +00:00
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return Ok(datastore.clone());
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}
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}
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2019-02-15 13:33:03 +00:00
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let datastore = DataStore::open(name)?;
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let datastore = Arc::new(datastore);
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map.insert(name.to_string(), datastore.clone());
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2018-12-22 16:37:25 +00:00
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2019-02-15 13:33:03 +00:00
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Ok(datastore)
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2018-12-22 16:37:25 +00:00
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}
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2019-02-14 12:13:49 +00:00
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pub fn open(store_name: &str) -> Result<Self, Error> {
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2018-12-17 12:00:39 +00:00
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2020-01-14 11:57:03 +00:00
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let (config, _digest) = datastore::config()?;
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2018-12-17 12:00:39 +00:00
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let (_, store_config) = config.sections.get(store_name)
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.ok_or(format_err!("no such datastore '{}'", store_name))?;
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let path = store_config["path"].as_str().unwrap();
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2018-12-19 12:40:26 +00:00
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let chunk_store = ChunkStore::open(store_name, path)?;
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2018-12-17 12:00:39 +00:00
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2019-04-11 10:04:25 +00:00
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let gc_status = GarbageCollectionStatus::default();
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2018-12-17 12:00:39 +00:00
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Ok(Self {
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2019-01-15 10:38:26 +00:00
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chunk_store: Arc::new(chunk_store),
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2018-12-22 15:58:16 +00:00
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gc_mutex: Mutex::new(false),
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2019-04-11 10:04:25 +00:00
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last_gc_status: Mutex::new(gc_status),
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2018-12-17 12:00:39 +00:00
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})
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}
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2019-02-14 10:39:09 +00:00
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pub fn get_chunk_iterator(
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&self,
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) -> Result<
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2019-07-04 07:26:44 +00:00
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impl Iterator<Item = (Result<tools::fs::ReadDirEntry, Error>, usize)>,
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2019-02-14 10:39:09 +00:00
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Error
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> {
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2019-07-04 07:26:44 +00:00
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self.chunk_store.get_chunk_iterator()
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2019-02-14 10:39:09 +00:00
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}
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2019-02-12 10:50:45 +00:00
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pub fn create_fixed_writer<P: AsRef<Path>>(&self, filename: P, size: usize, chunk_size: usize) -> Result<FixedIndexWriter, Error> {
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2018-12-17 12:00:39 +00:00
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2019-02-12 10:50:45 +00:00
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let index = FixedIndexWriter::create(self.chunk_store.clone(), filename.as_ref(), size, chunk_size)?;
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2018-12-17 12:00:39 +00:00
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Ok(index)
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}
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2019-02-12 10:50:45 +00:00
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pub fn open_fixed_reader<P: AsRef<Path>>(&self, filename: P) -> Result<FixedIndexReader, Error> {
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2018-12-17 12:00:39 +00:00
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2019-07-04 06:09:48 +00:00
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let full_path = self.chunk_store.relative_path(filename.as_ref());
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let index = FixedIndexReader::open(&full_path)?;
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2018-12-17 12:00:39 +00:00
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Ok(index)
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}
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2018-12-18 10:06:03 +00:00
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2019-02-12 11:05:33 +00:00
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pub fn create_dynamic_writer<P: AsRef<Path>>(
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2018-12-31 16:30:08 +00:00
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&self, filename: P,
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2019-02-12 11:05:33 +00:00
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) -> Result<DynamicIndexWriter, Error> {
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2018-12-31 16:30:08 +00:00
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2019-02-12 11:05:33 +00:00
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let index = DynamicIndexWriter::create(
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2019-05-29 06:49:57 +00:00
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self.chunk_store.clone(), filename.as_ref())?;
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2018-12-31 16:30:08 +00:00
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Ok(index)
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}
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2019-01-18 11:01:37 +00:00
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2019-02-12 11:05:33 +00:00
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pub fn open_dynamic_reader<P: AsRef<Path>>(&self, filename: P) -> Result<DynamicIndexReader, Error> {
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2019-01-02 13:27:04 +00:00
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2019-06-28 14:35:00 +00:00
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let full_path = self.chunk_store.relative_path(filename.as_ref());
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let index = DynamicIndexReader::open(&full_path)?;
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2019-01-02 13:27:04 +00:00
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Ok(index)
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}
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2019-02-28 09:21:56 +00:00
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pub fn open_index<P>(&self, filename: P) -> Result<Box<dyn IndexFile + Send>, Error>
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where
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P: AsRef<Path>,
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{
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let filename = filename.as_ref();
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let out: Box<dyn IndexFile + Send> =
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2019-12-31 14:23:41 +00:00
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match archive_type(filename)? {
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ArchiveType::DynamicIndex => Box::new(self.open_dynamic_reader(filename)?),
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ArchiveType::FixedIndex => Box::new(self.open_fixed_reader(filename)?),
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2019-02-28 09:21:56 +00:00
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_ => bail!("cannot open index file of unknown type: {:?}", filename),
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};
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Ok(out)
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}
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2019-01-18 11:01:37 +00:00
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pub fn base_path(&self) -> PathBuf {
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self.chunk_store.base_path()
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}
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2020-01-05 14:15:12 +00:00
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/// Clenaup a backup directory
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///
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/// Removes all files not mentioned in the manifest.
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pub fn cleanup_backup_dir(&self, backup_dir: &BackupDir, manifest: &BackupManifest
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) -> Result<(), Error> {
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let mut full_path = self.base_path();
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full_path.push(backup_dir.relative_path());
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let mut wanted_files = HashSet::new();
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wanted_files.insert(MANIFEST_BLOB_NAME.to_string());
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manifest.files().iter().for_each(|item| { wanted_files.insert(item.filename.clone()); });
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for item in tools::fs::read_subdir(libc::AT_FDCWD, &full_path)? {
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if let Ok(item) = item {
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if let Some(file_type) = item.file_type() {
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if file_type != nix::dir::Type::File { continue; }
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}
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let file_name = item.file_name().to_bytes();
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if file_name == b"." || file_name == b".." { continue; };
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if let Ok(name) = std::str::from_utf8(file_name) {
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if wanted_files.contains(name) { continue; }
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}
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println!("remove unused file {:?}", item.file_name());
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let dirfd = item.parent_fd();
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let _res = unsafe { libc::unlinkat(dirfd, item.file_name().as_ptr(), 0) };
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}
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}
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Ok(())
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}
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2020-01-17 10:24:55 +00:00
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2020-01-22 14:04:08 +00:00
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/// Returns the absolute path for a backup_group
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pub fn group_path(&self, backup_group: &BackupGroup) -> PathBuf {
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2020-01-17 10:24:55 +00:00
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let mut full_path = self.base_path();
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full_path.push(backup_group.group_path());
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2020-01-22 14:04:08 +00:00
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full_path
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}
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/// Returns the absolute path for backup_dir
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pub fn snapshot_path(&self, backup_dir: &BackupDir) -> PathBuf {
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let mut full_path = self.base_path();
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full_path.push(backup_dir.relative_path());
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full_path
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}
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/// Remove a complete backup group including all snapshots
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pub fn remove_backup_group(&self, backup_group: &BackupGroup) -> Result<(), io::Error> {
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let full_path = self.group_path(backup_group);
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2020-01-17 10:24:55 +00:00
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log::info!("removing backup group {:?}", full_path);
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std::fs::remove_dir_all(full_path)?;
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Ok(())
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}
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2019-02-28 11:51:27 +00:00
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/// Remove a backup directory including all content
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2020-01-22 14:04:08 +00:00
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pub fn remove_backup_dir(&self, backup_dir: &BackupDir) -> Result<(), io::Error> {
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2019-02-28 11:51:27 +00:00
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2020-01-22 14:04:08 +00:00
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let full_path = self.snapshot_path(backup_dir);
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2019-02-28 11:51:27 +00:00
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log::info!("removing backup {:?}", full_path);
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std::fs::remove_dir_all(full_path)?;
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Ok(())
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}
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2020-01-22 14:04:08 +00:00
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/// Returns the time of the last successful backup
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///
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/// Or None if there is no backup in the group (or the group dir does not exist).
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pub fn last_successful_backup(&self, backup_group: &BackupGroup) -> Result<Option<DateTime<Utc>>, Error> {
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let base_path = self.base_path();
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let mut group_path = base_path.clone();
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group_path.push(backup_group.group_path());
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if group_path.exists() {
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backup_group.last_successful_backup(&base_path)
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} else {
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Ok(None)
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}
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}
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2019-03-05 06:18:12 +00:00
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pub fn create_backup_dir(&self, backup_dir: &BackupDir) -> Result<(PathBuf, bool), io::Error> {
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2019-01-18 11:01:37 +00:00
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2019-02-27 09:02:22 +00:00
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// create intermediate path first:
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let mut full_path = self.base_path();
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2019-03-05 06:18:12 +00:00
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full_path.push(backup_dir.group().group_path());
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2019-02-27 09:02:22 +00:00
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std::fs::create_dir_all(&full_path)?;
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2019-03-05 06:18:12 +00:00
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let relative_path = backup_dir.relative_path();
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let mut full_path = self.base_path();
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full_path.push(&relative_path);
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2019-01-18 11:01:37 +00:00
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2019-02-27 09:02:22 +00:00
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// create the last component now
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match std::fs::create_dir(&full_path) {
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Ok(_) => Ok((relative_path, true)),
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Err(ref e) if e.kind() == io::ErrorKind::AlreadyExists => Ok((relative_path, false)),
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Err(e) => Err(e)
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}
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2019-01-18 11:01:37 +00:00
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}
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2018-12-18 10:06:03 +00:00
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pub fn list_images(&self) -> Result<Vec<PathBuf>, Error> {
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2019-01-18 11:01:37 +00:00
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let base = self.base_path();
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2018-12-18 10:06:03 +00:00
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let mut list = vec![];
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2019-01-18 11:24:58 +00:00
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use walkdir::WalkDir;
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let walker = WalkDir::new(&base).same_file_system(true).into_iter();
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// make sure we skip .chunks (and other hidden files to keep it simple)
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fn is_hidden(entry: &walkdir::DirEntry) -> bool {
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entry.file_name()
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.to_str()
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.map(|s| s.starts_with("."))
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.unwrap_or(false)
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}
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for entry in walker.filter_entry(|e| !is_hidden(e)) {
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let path = entry?.into_path();
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2019-12-31 14:23:41 +00:00
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if let Ok(archive_type) = archive_type(&path) {
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if archive_type == ArchiveType::FixedIndex || archive_type == ArchiveType::DynamicIndex {
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2019-01-18 11:24:58 +00:00
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list.push(path);
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2018-12-18 10:06:03 +00:00
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}
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}
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}
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Ok(list)
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}
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2019-07-04 05:57:43 +00:00
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// mark chunks used by ``index`` as used
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fn index_mark_used_chunks<I: IndexFile>(
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&self,
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index: I,
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file_name: &Path, // only used for error reporting
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status: &mut GarbageCollectionStatus,
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) -> Result<(), Error> {
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status.index_file_count += 1;
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status.index_data_bytes += index.index_bytes();
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for pos in 0..index.index_count() {
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tools::fail_on_shutdown()?;
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let digest = index.index_digest(pos).unwrap();
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if let Err(err) = self.chunk_store.touch_chunk(digest) {
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bail!("unable to access chunk {}, required by {:?} - {}",
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proxmox::tools::digest_to_hex(digest), file_name, err);
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}
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}
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Ok(())
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}
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2018-12-22 15:58:16 +00:00
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fn mark_used_chunks(&self, status: &mut GarbageCollectionStatus) -> Result<(), Error> {
|
2018-12-18 10:06:03 +00:00
|
|
|
|
|
|
|
let image_list = self.list_images()?;
|
|
|
|
|
|
|
|
for path in image_list {
|
2019-04-01 10:13:02 +00:00
|
|
|
|
|
|
|
tools::fail_on_shutdown()?;
|
|
|
|
|
2019-12-31 14:23:41 +00:00
|
|
|
if let Ok(archive_type) = archive_type(&path) {
|
|
|
|
if archive_type == ArchiveType::FixedIndex {
|
2019-02-12 10:50:45 +00:00
|
|
|
let index = self.open_fixed_reader(&path)?;
|
2019-07-04 05:57:43 +00:00
|
|
|
self.index_mark_used_chunks(index, &path, status)?;
|
2019-12-31 14:23:41 +00:00
|
|
|
} else if archive_type == ArchiveType::DynamicIndex {
|
2019-02-12 11:05:33 +00:00
|
|
|
let index = self.open_dynamic_reader(&path)?;
|
2019-07-04 05:57:43 +00:00
|
|
|
self.index_mark_used_chunks(index, &path, status)?;
|
2019-01-02 13:27:04 +00:00
|
|
|
}
|
|
|
|
}
|
2018-12-18 10:06:03 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
Ok(())
|
2019-04-11 10:04:25 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
pub fn last_gc_status(&self) -> GarbageCollectionStatus {
|
|
|
|
self.last_gc_status.lock().unwrap().clone()
|
|
|
|
}
|
2018-12-18 10:06:03 +00:00
|
|
|
|
2019-04-06 15:57:38 +00:00
|
|
|
pub fn garbage_collection(&self, worker: Arc<WorkerTask>) -> Result<(), Error> {
|
2018-12-18 10:06:03 +00:00
|
|
|
|
2018-12-25 12:29:27 +00:00
|
|
|
if let Ok(ref mut _mutex) = self.gc_mutex.try_lock() {
|
2018-12-22 13:04:05 +00:00
|
|
|
|
2019-03-22 08:42:15 +00:00
|
|
|
let _exclusive_lock = self.chunk_store.try_exclusive_lock()?;
|
|
|
|
|
2019-03-31 15:21:36 +00:00
|
|
|
let oldest_writer = self.chunk_store.oldest_writer();
|
|
|
|
|
2018-12-22 15:58:16 +00:00
|
|
|
let mut gc_status = GarbageCollectionStatus::default();
|
2019-04-11 10:04:25 +00:00
|
|
|
gc_status.upid = Some(worker.to_string());
|
2018-12-18 10:18:55 +00:00
|
|
|
|
2019-12-10 10:25:29 +00:00
|
|
|
worker.log("Start GC phase1 (mark used chunks)");
|
2018-12-22 15:58:16 +00:00
|
|
|
|
|
|
|
self.mark_used_chunks(&mut gc_status)?;
|
|
|
|
|
2019-04-06 15:57:38 +00:00
|
|
|
worker.log("Start GC phase2 (sweep unused chunks)");
|
2019-07-04 07:26:44 +00:00
|
|
|
self.chunk_store.sweep_unused_chunks(oldest_writer, &mut gc_status, worker.clone())?;
|
2018-12-22 15:58:16 +00:00
|
|
|
|
2019-07-04 05:57:43 +00:00
|
|
|
worker.log(&format!("Removed bytes: {}", gc_status.removed_bytes));
|
|
|
|
worker.log(&format!("Removed chunks: {}", gc_status.removed_chunks));
|
|
|
|
worker.log(&format!("Original data bytes: {}", gc_status.index_data_bytes));
|
2019-12-19 06:09:39 +00:00
|
|
|
|
|
|
|
if gc_status.index_data_bytes > 0 {
|
|
|
|
let comp_per = (gc_status.disk_bytes*100)/gc_status.index_data_bytes;
|
|
|
|
worker.log(&format!("Disk bytes: {} ({} %)", gc_status.disk_bytes, comp_per));
|
|
|
|
}
|
|
|
|
|
2019-04-06 15:57:38 +00:00
|
|
|
worker.log(&format!("Disk chunks: {}", gc_status.disk_chunks));
|
2019-12-19 06:09:39 +00:00
|
|
|
|
|
|
|
if gc_status.disk_chunks > 0 {
|
|
|
|
let avg_chunk = gc_status.disk_bytes/(gc_status.disk_chunks as u64);
|
|
|
|
worker.log(&format!("Average chunk size: {}", avg_chunk));
|
|
|
|
}
|
2018-12-22 15:58:16 +00:00
|
|
|
|
2019-04-11 10:04:25 +00:00
|
|
|
*self.last_gc_status.lock().unwrap() = gc_status;
|
|
|
|
|
2018-12-22 15:58:16 +00:00
|
|
|
} else {
|
2019-04-06 15:57:38 +00:00
|
|
|
bail!("Start GC failed - (already running/locked)");
|
2018-12-22 15:58:16 +00:00
|
|
|
}
|
2018-12-18 10:06:03 +00:00
|
|
|
|
|
|
|
Ok(())
|
|
|
|
}
|
2019-03-06 09:19:07 +00:00
|
|
|
|
2020-01-02 10:00:33 +00:00
|
|
|
pub fn try_shared_chunk_store_lock(&self) -> Result<tools::ProcessLockSharedGuard, Error> {
|
|
|
|
self.chunk_store.try_shared_lock()
|
|
|
|
}
|
|
|
|
|
2019-06-28 14:35:00 +00:00
|
|
|
pub fn chunk_path(&self, digest:&[u8; 32]) -> (PathBuf, String) {
|
|
|
|
self.chunk_store.chunk_path(digest)
|
|
|
|
}
|
|
|
|
|
2020-01-02 12:26:28 +00:00
|
|
|
pub fn cond_touch_chunk(&self, digest: &[u8; 32], fail_if_not_exist: bool) -> Result<bool, Error> {
|
|
|
|
self.chunk_store.cond_touch_chunk(digest, fail_if_not_exist)
|
|
|
|
}
|
|
|
|
|
2019-06-13 09:47:23 +00:00
|
|
|
pub fn insert_chunk(
|
2019-03-06 09:19:07 +00:00
|
|
|
&self,
|
2019-10-06 08:31:06 +00:00
|
|
|
chunk: &DataBlob,
|
|
|
|
digest: &[u8; 32],
|
2019-03-06 09:19:07 +00:00
|
|
|
) -> Result<(bool, u64), Error> {
|
2019-10-06 08:31:06 +00:00
|
|
|
self.chunk_store.insert_chunk(chunk, digest)
|
2019-03-06 09:19:07 +00:00
|
|
|
}
|
2018-12-17 12:00:39 +00:00
|
|
|
}
|