118 lines
3.8 KiB
Rust
118 lines
3.8 KiB
Rust
// Copyright 2015, 2016 Ethcore (UK) Ltd.
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// This file is part of Parity.
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// Parity is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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// Parity is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Bloom upgrade
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use std::sync::Arc;
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use db::{COL_EXTRA, COL_HEADERS, COL_STATE};
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use state_db::{ACCOUNT_BLOOM_SPACE, DEFAULT_ACCOUNT_PRESET, StateDB};
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use util::trie::TrieDB;
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use views::HeaderView;
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use bloom_journal::Bloom;
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use util::migration::{Error, Migration, Progress, Batch, Config};
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use util::journaldb;
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use util::{H256, FixedHash, Trie};
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use util::{Database, DBTransaction};
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/// Account bloom upgrade routine. If bloom already present, does nothing.
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/// If database empty (no best block), does nothing.
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/// Can be called on upgraded database with no issues (will do nothing).
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pub fn generate_bloom(source: Arc<Database>, dest: &mut Database) -> Result<(), Error> {
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trace!(target: "migration", "Account bloom upgrade started");
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let best_block_hash = match try!(source.get(COL_EXTRA, b"best")) {
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// no migration needed
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None => {
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trace!(target: "migration", "No best block hash, skipping");
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return Ok(());
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},
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Some(hash) => hash,
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};
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let best_block_header = match try!(source.get(COL_HEADERS, &best_block_hash)) {
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// no best block, nothing to do
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None => {
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trace!(target: "migration", "No best block header, skipping");
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return Ok(())
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},
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Some(x) => x,
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};
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let state_root = HeaderView::new(&best_block_header).state_root();
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trace!("Adding accounts bloom (one-time upgrade)");
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let bloom_journal = {
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let mut bloom = Bloom::new(ACCOUNT_BLOOM_SPACE, DEFAULT_ACCOUNT_PRESET);
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// no difference what algorithm is passed, since there will be no writes
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let state_db = journaldb::new(
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source.clone(),
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journaldb::Algorithm::OverlayRecent,
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COL_STATE);
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let account_trie = try!(TrieDB::new(state_db.as_hashdb(), &state_root).map_err(|e| Error::Custom(format!("Cannot open trie: {:?}", e))));
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for item in try!(account_trie.iter().map_err(|_| Error::MigrationImpossible)) {
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let (ref account_key, _) = try!(item.map_err(|_| Error::MigrationImpossible));
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let account_key_hash = H256::from_slice(account_key);
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bloom.set(&*account_key_hash);
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}
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bloom.drain_journal()
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};
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trace!(target: "migration", "Generated {} bloom updates", bloom_journal.entries.len());
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let mut batch = DBTransaction::new(dest);
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try!(StateDB::commit_bloom(&mut batch, bloom_journal).map_err(|_| Error::Custom("Failed to commit bloom".to_owned())));
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try!(dest.write(batch));
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trace!(target: "migration", "Finished bloom update");
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Ok(())
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}
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/// Account bloom migration.
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#[derive(Default)]
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pub struct ToV10 {
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progress: Progress,
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}
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impl ToV10 {
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/// New v10 migration
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pub fn new() -> ToV10 { ToV10 { progress: Progress::default() } }
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}
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impl Migration for ToV10 {
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fn version(&self) -> u32 {
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10
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}
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fn pre_columns(&self) -> Option<u32> { Some(5) }
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fn columns(&self) -> Option<u32> { Some(6) }
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fn migrate(&mut self, source: Arc<Database>, config: &Config, dest: &mut Database, col: Option<u32>) -> Result<(), Error> {
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let mut batch = Batch::new(config, col);
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for (key, value) in source.iter(col) {
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self.progress.tick();
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try!(batch.insert(key.to_vec(), value.to_vec(), dest));
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}
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try!(batch.commit(dest));
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if col == COL_STATE {
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try!(generate_bloom(source, dest));
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}
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Ok(())
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}
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}
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