Remove most of the old ledger code
Removes LedgerWriter, read_ledger, LedgerWindow
This commit is contained in:
parent
45b4cf2887
commit
045c5e8556
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@ -109,7 +109,7 @@ mod tests {
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use crate::chacha::chacha_cbc_encrypt_ledger;
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use crate::chacha_cuda::chacha_cbc_encrypt_file_many_keys;
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use crate::db_ledger::{DbLedger, DEFAULT_SLOT_HEIGHT};
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use crate::ledger::{get_tmp_ledger_path, make_tiny_test_entries, LedgerWriter};
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use crate::ledger::{get_tmp_ledger_path, make_tiny_test_entries};
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use crate::replicator::sample_file;
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use solana_sdk::hash::Hash;
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use std::fs::{remove_dir_all, remove_file};
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@ -123,10 +123,6 @@ mod tests {
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let entries = make_tiny_test_entries(32);
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let ledger_dir = "test_encrypt_file_many_keys_single";
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let ledger_path = get_tmp_ledger_path(ledger_dir);
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{
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let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
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writer.write_entries(&entries).unwrap();
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}
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let db_ledger = Arc::new(DbLedger::open(&ledger_path).unwrap());
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db_ledger
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.write_entries(DEFAULT_SLOT_HEIGHT, 0, &entries)
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@ -161,10 +157,6 @@ mod tests {
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let entries = make_tiny_test_entries(32);
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let ledger_dir = "test_encrypt_file_many_keys_multiple";
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let ledger_path = get_tmp_ledger_path(ledger_dir);
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{
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let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
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writer.write_entries(&entries).unwrap();
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}
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let db_ledger = Arc::new(DbLedger::open(&ledger_path).unwrap());
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db_ledger
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.write_entries(DEFAULT_SLOT_HEIGHT, 0, &entries)
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644
src/ledger.rs
644
src/ledger.rs
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@ -6,9 +6,8 @@ use crate::db_ledger::{DbLedger, DEFAULT_SLOT_HEIGHT};
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use crate::entry::Entry;
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use crate::mint::Mint;
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use crate::packet::{Blob, SharedBlob, BLOB_DATA_SIZE};
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use bincode::{self, deserialize_from, serialize_into, serialized_size};
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use bincode::{self, serialized_size};
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use chrono::prelude::Utc;
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use log::Level::Trace;
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use rayon::prelude::*;
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use solana_sdk::budget_transaction::BudgetTransaction;
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use solana_sdk::hash::{hash, Hash};
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@ -17,436 +16,7 @@ use solana_sdk::signature::{Keypair, KeypairUtil};
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use solana_sdk::transaction::Transaction;
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use solana_sdk::vote_program::Vote;
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use solana_sdk::vote_transaction::VoteTransaction;
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use std::fs::{create_dir_all, remove_dir_all, File, OpenOptions};
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use std::io::prelude::*;
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use std::io::{self, BufReader, BufWriter, Seek, SeekFrom};
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use std::mem::size_of;
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use std::path::Path;
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//
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// A persistent ledger is 2 files:
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// ledger_path/ --+
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// +-- index <== an array of u64 offsets into data,
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// | each offset points to the first bytes
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// | of a u64 that contains the length of
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// | the entry. To make the code smaller,
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// | index[0] is set to 0, TODO: this field
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// | could later be used for other stuff...
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// +-- data <== concatenated instances of
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// u64 length
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// entry data
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//
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// When opening a ledger, we have the ability to "audit" it, which means we need
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// to pick which file to use as "truth", and correct the other file as
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// necessary, if possible.
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//
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// The protocol for writing the ledger is to append to the data file first, the
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// index file 2nd. If the writing node is interupted while appending to the
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// ledger, there are some possibilities we need to cover:
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//
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// 1. a partial write of data, which might be a partial write of length
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// or a partial write entry data
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// 2. a partial or missing write to index for that entry
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//
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// There is also the possibility of "unsynchronized" reading of the ledger
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// during transfer across nodes via rsync (or whatever). In this case, if the
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// transfer of the data file is done before the transfer of the index file,
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// it's likely that the index file will be far ahead of the data file in time.
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//
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// The quickest and most reliable strategy for recovery is therefore to treat
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// the data file as nearest to the "truth".
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//
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// The logic for "recovery/audit" is to open index and read backwards from the
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// last u64-aligned entry to get to where index and data agree (i.e. where a
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// successful deserialization of an entry can be performed), then truncate
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// both files to this syncrhonization point.
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//
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// ledger window
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#[derive(Debug)]
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struct LedgerWindow {
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index: BufReader<File>,
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data: BufReader<File>,
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}
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const LEDGER_DATA_FILE: &str = "data";
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const LEDGER_INDEX_FILE: &str = "index";
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// use a CONST because there's a cast, and we don't want "sizeof::<u64> as u64"...
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const SIZEOF_U64: u64 = size_of::<u64>() as u64;
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#[allow(clippy::needless_pass_by_value)]
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fn err_bincode_to_io(e: Box<bincode::ErrorKind>) -> io::Error {
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io::Error::new(io::ErrorKind::Other, e.to_string())
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}
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fn read_entry<A: Read>(file: &mut A, len: u64) -> io::Result<Entry> {
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deserialize_from(file.take(len)).map_err(err_bincode_to_io)
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}
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fn entry_at<A: Read + Seek>(file: &mut A, at: u64) -> io::Result<Entry> {
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let len = u64_at(file, at)?;
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read_entry(file, len)
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}
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fn next_entry<A: Read>(file: &mut A) -> io::Result<Entry> {
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let len = deserialize_from(file.take(SIZEOF_U64)).map_err(err_bincode_to_io)?;
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read_entry(file, len)
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}
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fn u64_at<A: Read + Seek>(file: &mut A, at: u64) -> io::Result<u64> {
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file.seek(SeekFrom::Start(at))?;
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deserialize_from(file.take(SIZEOF_U64)).map_err(err_bincode_to_io)
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}
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#[allow(dead_code)]
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impl LedgerWindow {
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// opens a Ledger in directory, provides "infinite" window
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//
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fn open(ledger_path: &str) -> io::Result<Self> {
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let ledger_path = Path::new(&ledger_path);
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let index = File::open(ledger_path.join(LEDGER_INDEX_FILE))?;
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let index = BufReader::new(index);
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let data = File::open(ledger_path.join(LEDGER_DATA_FILE))?;
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let data = BufReader::with_capacity(BLOB_DATA_SIZE, data);
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Ok(LedgerWindow { index, data })
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}
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fn get_entry(&mut self, index: u64) -> io::Result<Entry> {
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let offset = self.get_entry_offset(index)?;
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entry_at(&mut self.data, offset)
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}
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// Fill 'buf' with num_entries or most number of whole entries that fit into buf.len()
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//
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// Return tuple of (number of entries read, total size of entries read)
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fn get_entries_bytes(
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&mut self,
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start_index: u64,
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num_entries: u64,
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buf: &mut [u8],
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) -> io::Result<(u64, u64)> {
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let start_offset = self.get_entry_offset(start_index)?;
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let mut total_entries = 0;
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let mut end_offset = 0;
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for i in 0..num_entries {
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let offset = self.get_entry_offset(start_index + i)?;
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let len = u64_at(&mut self.data, offset)?;
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let cur_end_offset = offset + len + SIZEOF_U64;
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if (cur_end_offset - start_offset) > buf.len() as u64 {
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break;
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}
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end_offset = cur_end_offset;
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total_entries += 1;
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}
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if total_entries == 0 {
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return Ok((0, 0));
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}
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let read_len = end_offset - start_offset;
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self.data.seek(SeekFrom::Start(start_offset))?;
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let fread_len = self.data.read(&mut buf[..read_len as usize])? as u64;
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if fread_len != read_len {
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return Err(io::Error::new(
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io::ErrorKind::Other,
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format!(
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"entry read_len({}) doesn't match expected ({})",
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fread_len, read_len
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),
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));
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}
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Ok((total_entries, read_len))
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}
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fn get_entry_offset(&mut self, index: u64) -> io::Result<u64> {
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u64_at(&mut self.index, index * SIZEOF_U64)
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}
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}
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pub fn verify_ledger(ledger_path: &str) -> io::Result<()> {
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let ledger_path = Path::new(&ledger_path);
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let index = File::open(ledger_path.join(LEDGER_INDEX_FILE))?;
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let index_len = index.metadata()?.len();
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if index_len % SIZEOF_U64 != 0 {
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Err(io::Error::new(
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io::ErrorKind::Other,
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format!("index is not a multiple of {} bytes long", SIZEOF_U64),
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))?;
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}
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let mut index = BufReader::new(index);
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let data = File::open(ledger_path.join(LEDGER_DATA_FILE))?;
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let mut data = BufReader::with_capacity(BLOB_DATA_SIZE, data);
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let mut last_data_offset = 0;
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let mut index_offset = 0;
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let mut data_read = 0;
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let mut last_len = 0;
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let mut i = 0;
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while index_offset < index_len {
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let data_offset = u64_at(&mut index, index_offset)?;
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if last_data_offset + last_len != data_offset {
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Err(io::Error::new(
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io::ErrorKind::Other,
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format!(
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"at entry[{}], a gap or an overlap last_offset {} offset {} last_len {}",
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i, last_data_offset, data_offset, last_len
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),
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))?;
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}
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match entry_at(&mut data, data_offset) {
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Err(e) => Err(io::Error::new(
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io::ErrorKind::Other,
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format!(
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"entry[{}] deserialize() failed at offset {}, err: {}",
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index_offset / SIZEOF_U64,
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data_offset,
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e.to_string(),
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),
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))?,
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Ok(entry) => {
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last_len = serialized_size(&entry).map_err(err_bincode_to_io)? + SIZEOF_U64
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}
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}
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last_data_offset = data_offset;
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data_read += last_len;
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index_offset += SIZEOF_U64;
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i += 1;
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}
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let data = data.into_inner();
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if data_read != data.metadata()?.len() {
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Err(io::Error::new(
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io::ErrorKind::Other,
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"garbage on end of data file",
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))?;
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}
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Ok(())
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}
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fn recover_ledger(ledger_path: &str) -> io::Result<()> {
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let ledger_path = Path::new(ledger_path);
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let mut index = OpenOptions::new()
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.write(true)
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.read(true)
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.open(ledger_path.join(LEDGER_INDEX_FILE))?;
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let mut data = OpenOptions::new()
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.write(true)
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.read(true)
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.open(ledger_path.join(LEDGER_DATA_FILE))?;
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// first, truncate to a multiple of SIZEOF_U64
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let len = index.metadata()?.len();
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if len % SIZEOF_U64 != 0 {
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trace!("recover: trimming index len to {}", len - len % SIZEOF_U64);
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index.set_len(len - (len % SIZEOF_U64))?;
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}
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// next, pull index offsets off one at a time until the last one points
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// to a valid entry deserialization offset...
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loop {
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let len = index.metadata()?.len();
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trace!("recover: index len:{}", len);
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// should never happen
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if len < SIZEOF_U64 {
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trace!("recover: error index len {} too small", len);
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Err(io::Error::new(io::ErrorKind::Other, "empty ledger index"))?;
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}
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let offset = u64_at(&mut index, len - SIZEOF_U64)?;
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trace!("recover: offset[{}]: {}", (len / SIZEOF_U64) - 1, offset);
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match entry_at(&mut data, offset) {
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Ok(entry) => {
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trace!("recover: entry[{}]: {:?}", (len / SIZEOF_U64) - 1, entry);
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let entry_len = serialized_size(&entry).map_err(err_bincode_to_io)?;
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trace!("recover: entry_len: {}", entry_len);
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// now trim data file to size...
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data.set_len(offset + SIZEOF_U64 + entry_len)?;
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trace!(
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"recover: trimmed data file to {}",
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offset + SIZEOF_U64 + entry_len
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);
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break; // all good
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}
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Err(_err) => {
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trace!(
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"recover: no entry recovered at {} {}",
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offset,
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_err.to_string()
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);
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index.set_len(len - SIZEOF_U64)?;
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}
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}
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}
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if log_enabled!(Trace) {
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let num_entries = index.metadata()?.len() / SIZEOF_U64;
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trace!("recover: done. {} entries", num_entries);
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}
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// flush everything to disk...
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index.sync_all()?;
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data.sync_all()
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}
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// TODO?? ... we could open the files on demand to support [], but today
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// LedgerWindow needs "&mut self"
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//
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//impl Index<u64> for LedgerWindow {
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// type Output = io::Result<Entry>;
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//
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// fn index(&mut self, index: u64) -> &io::Result<Entry> {
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// match u64_at(&mut self.index, index * SIZEOF_U64) {
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// Ok(offset) => &entry_at(&mut self.data, offset),
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// Err(e) => &Err(e),
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// }
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// }
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//}
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#[derive(Debug)]
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pub struct LedgerWriter {
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index: BufWriter<File>,
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data: BufWriter<File>,
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}
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impl LedgerWriter {
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// recover and open the ledger for writing
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pub fn recover(ledger_path: &str) -> io::Result<Self> {
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recover_ledger(ledger_path)?;
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LedgerWriter::open(ledger_path, false)
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}
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// opens or creates a LedgerWriter in ledger_path directory
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pub fn open(ledger_path: &str, create: bool) -> io::Result<Self> {
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let ledger_path = Path::new(&ledger_path);
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if create {
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let _ignored = remove_dir_all(ledger_path);
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create_dir_all(ledger_path)?;
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}
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let index = OpenOptions::new()
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.create(create)
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.append(true)
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.open(ledger_path.join(LEDGER_INDEX_FILE))?;
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if log_enabled!(Trace) {
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let len = index.metadata()?.len();
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trace!("LedgerWriter::new: index fp:{}", len);
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}
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let index = BufWriter::new(index);
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let data = OpenOptions::new()
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.create(create)
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.append(true)
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.open(ledger_path.join(LEDGER_DATA_FILE))?;
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if log_enabled!(Trace) {
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let len = data.metadata()?.len();
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trace!("LedgerWriter::new: data fp:{}", len);
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}
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let data = BufWriter::new(data);
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Ok(LedgerWriter { index, data })
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}
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fn write_entry_noflush(&mut self, entry: &Entry) -> io::Result<()> {
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let len = serialized_size(&entry).map_err(err_bincode_to_io)?;
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serialize_into(&mut self.data, &len).map_err(err_bincode_to_io)?;
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if log_enabled!(Trace) {
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let offset = self.data.seek(SeekFrom::Current(0))?;
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trace!("write_entry: after len data fp:{}", offset);
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}
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serialize_into(&mut self.data, &entry).map_err(err_bincode_to_io)?;
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if log_enabled!(Trace) {
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let offset = self.data.seek(SeekFrom::Current(0))?;
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trace!("write_entry: after entry data fp:{}", offset);
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}
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let offset = self.data.seek(SeekFrom::Current(0))? - len - SIZEOF_U64;
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trace!("write_entry: offset:{} len:{}", offset, len);
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serialize_into(&mut self.index, &offset).map_err(err_bincode_to_io)?;
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if log_enabled!(Trace) {
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let offset = self.index.seek(SeekFrom::Current(0))?;
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trace!("write_entry: end index fp:{}", offset);
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}
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Ok(())
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}
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pub fn write_entry(&mut self, entry: &Entry) -> io::Result<()> {
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self.write_entry_noflush(&entry)?;
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self.index.flush()?;
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self.data.flush()?;
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Ok(())
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}
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pub fn write_entries<'a, I>(&mut self, entries: I) -> io::Result<()>
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where
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I: IntoIterator<Item = &'a Entry>,
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{
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for entry in entries {
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self.write_entry_noflush(entry)?;
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}
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self.index.flush()?;
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self.data.flush()?;
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Ok(())
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}
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}
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#[derive(Debug)]
|
||||
pub struct LedgerReader {
|
||||
data: BufReader<File>,
|
||||
}
|
||||
|
||||
impl Iterator for LedgerReader {
|
||||
type Item = io::Result<Entry>;
|
||||
|
||||
fn next(&mut self) -> Option<io::Result<Entry>> {
|
||||
match next_entry(&mut self.data) {
|
||||
Ok(entry) => Some(Ok(entry)),
|
||||
Err(_) => None,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Return an iterator for all the entries in the given file.
|
||||
pub fn read_ledger(
|
||||
ledger_path: &str,
|
||||
recover: bool,
|
||||
) -> io::Result<impl Iterator<Item = io::Result<Entry>>> {
|
||||
if recover {
|
||||
recover_ledger(ledger_path)?;
|
||||
}
|
||||
|
||||
let ledger_path = Path::new(&ledger_path);
|
||||
let data = File::open(ledger_path.join(LEDGER_DATA_FILE))?;
|
||||
let data = BufReader::new(data);
|
||||
|
||||
Ok(LedgerReader { data })
|
||||
}
|
||||
use std::fs::remove_dir_all;
|
||||
|
||||
// a Block is a slice of Entries
|
||||
pub trait Block {
|
||||
|
@ -732,7 +302,7 @@ mod tests {
|
|||
use super::*;
|
||||
use crate::entry::{next_entry, reconstruct_entries_from_blobs, Entry};
|
||||
use crate::packet::{to_blobs, BLOB_DATA_SIZE, PACKET_DATA_SIZE};
|
||||
use bincode::{deserialize, serialized_size};
|
||||
use bincode::serialized_size;
|
||||
use solana_sdk::hash::hash;
|
||||
use solana_sdk::signature::{Keypair, KeypairUtil, Signature};
|
||||
use solana_sdk::transaction::Transaction;
|
||||
|
@ -869,212 +439,4 @@ mod tests {
|
|||
assert!(entries0.verify(&id));
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_ledger_reader_writer() {
|
||||
solana_logger::setup();
|
||||
let ledger_path = get_tmp_ledger_path("test_ledger_reader_writer");
|
||||
let entries = make_tiny_test_entries(10);
|
||||
|
||||
{
|
||||
let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
|
||||
writer.write_entries(&entries.clone()).unwrap();
|
||||
// drops writer, flushes buffers
|
||||
}
|
||||
verify_ledger(&ledger_path).unwrap();
|
||||
|
||||
let mut read_entries = vec![];
|
||||
for x in read_ledger(&ledger_path, true).unwrap() {
|
||||
let entry = x.unwrap();
|
||||
trace!("entry... {:?}", entry);
|
||||
read_entries.push(entry);
|
||||
}
|
||||
assert_eq!(read_entries, entries);
|
||||
|
||||
let mut window = LedgerWindow::open(&ledger_path).unwrap();
|
||||
|
||||
for (i, entry) in entries.iter().enumerate() {
|
||||
let read_entry = window.get_entry(i as u64).unwrap();
|
||||
assert_eq!(*entry, read_entry);
|
||||
}
|
||||
assert!(window.get_entry(100).is_err());
|
||||
|
||||
std::fs::remove_file(Path::new(&ledger_path).join(LEDGER_DATA_FILE)).unwrap();
|
||||
// empty data file should fall over
|
||||
assert!(LedgerWindow::open(&ledger_path).is_err());
|
||||
assert!(read_ledger(&ledger_path, false).is_err());
|
||||
|
||||
std::fs::remove_dir_all(ledger_path).unwrap();
|
||||
}
|
||||
|
||||
fn truncated_last_entry(ledger_path: &str, entries: Vec<Entry>) {
|
||||
let len = {
|
||||
let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
|
||||
writer.write_entries(&entries).unwrap();
|
||||
writer.data.seek(SeekFrom::Current(0)).unwrap()
|
||||
};
|
||||
verify_ledger(&ledger_path).unwrap();
|
||||
|
||||
let data = OpenOptions::new()
|
||||
.write(true)
|
||||
.open(Path::new(&ledger_path).join(LEDGER_DATA_FILE))
|
||||
.unwrap();
|
||||
data.set_len(len - 4).unwrap();
|
||||
}
|
||||
|
||||
fn garbage_on_data(ledger_path: &str, entries: Vec<Entry>) {
|
||||
let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
|
||||
writer.write_entries(&entries).unwrap();
|
||||
writer.data.write_all(b"hi there!").unwrap();
|
||||
}
|
||||
|
||||
fn read_ledger_check(ledger_path: &str, entries: Vec<Entry>, len: usize) {
|
||||
let read_entries = read_ledger(&ledger_path, true).unwrap();
|
||||
let mut i = 0;
|
||||
|
||||
for entry in read_entries {
|
||||
assert_eq!(entry.unwrap(), entries[i]);
|
||||
i += 1;
|
||||
}
|
||||
assert_eq!(i, len);
|
||||
}
|
||||
|
||||
fn ledger_window_check(ledger_path: &str, entries: Vec<Entry>, len: usize) {
|
||||
let mut window = LedgerWindow::open(&ledger_path).unwrap();
|
||||
for i in 0..len {
|
||||
let entry = window.get_entry(i as u64);
|
||||
assert_eq!(entry.unwrap(), entries[i]);
|
||||
}
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_recover_ledger() {
|
||||
solana_logger::setup();
|
||||
|
||||
let entries = make_tiny_test_entries(10);
|
||||
let ledger_path = get_tmp_ledger_path("test_recover_ledger");
|
||||
|
||||
// truncate data file, tests recover inside read_ledger_check()
|
||||
truncated_last_entry(&ledger_path, entries.clone());
|
||||
read_ledger_check(&ledger_path, entries.clone(), entries.len() - 1);
|
||||
|
||||
// truncate data file, tests recover inside LedgerWindow::new()
|
||||
truncated_last_entry(&ledger_path, entries.clone());
|
||||
ledger_window_check(&ledger_path, entries.clone(), entries.len() - 1);
|
||||
|
||||
// restore last entry, tests recover_ledger() inside LedgerWriter::new()
|
||||
truncated_last_entry(&ledger_path, entries.clone());
|
||||
// verify should fail at first
|
||||
assert!(verify_ledger(&ledger_path).is_err());
|
||||
{
|
||||
let mut writer = LedgerWriter::recover(&ledger_path).unwrap();
|
||||
writer.write_entry(&entries[entries.len() - 1]).unwrap();
|
||||
}
|
||||
// and be fine after recover()
|
||||
verify_ledger(&ledger_path).unwrap();
|
||||
|
||||
read_ledger_check(&ledger_path, entries.clone(), entries.len());
|
||||
ledger_window_check(&ledger_path, entries.clone(), entries.len());
|
||||
|
||||
// make it look like data is newer in time, check reader...
|
||||
garbage_on_data(&ledger_path, entries.clone());
|
||||
read_ledger_check(&ledger_path, entries.clone(), entries.len());
|
||||
|
||||
// make it look like data is newer in time, check window...
|
||||
garbage_on_data(&ledger_path, entries.clone());
|
||||
ledger_window_check(&ledger_path, entries.clone(), entries.len());
|
||||
|
||||
// make it look like data is newer in time, check writer...
|
||||
garbage_on_data(&ledger_path, entries[..entries.len() - 1].to_vec());
|
||||
assert!(verify_ledger(&ledger_path).is_err());
|
||||
{
|
||||
let mut writer = LedgerWriter::recover(&ledger_path).unwrap();
|
||||
writer.write_entry(&entries[entries.len() - 1]).unwrap();
|
||||
}
|
||||
verify_ledger(&ledger_path).unwrap();
|
||||
read_ledger_check(&ledger_path, entries.clone(), entries.len());
|
||||
ledger_window_check(&ledger_path, entries.clone(), entries.len());
|
||||
let _ignored = remove_dir_all(&ledger_path);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_verify_ledger() {
|
||||
solana_logger::setup();
|
||||
|
||||
let entries = make_tiny_test_entries(10);
|
||||
let ledger_path = get_tmp_ledger_path("test_verify_ledger");
|
||||
{
|
||||
let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
|
||||
writer.write_entries(&entries).unwrap();
|
||||
}
|
||||
// TODO more cases that make ledger_verify() fail
|
||||
// assert!(verify_ledger(&ledger_path).is_err());
|
||||
|
||||
assert!(verify_ledger(&ledger_path).is_ok());
|
||||
let _ignored = remove_dir_all(&ledger_path);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn test_get_entries_bytes() {
|
||||
solana_logger::setup();
|
||||
let entries = make_tiny_test_entries(10);
|
||||
let ledger_path = get_tmp_ledger_path("test_raw_entries");
|
||||
{
|
||||
let mut writer = LedgerWriter::open(&ledger_path, true).unwrap();
|
||||
writer.write_entries(&entries).unwrap();
|
||||
}
|
||||
|
||||
let mut window = LedgerWindow::open(&ledger_path).unwrap();
|
||||
let mut buf = [0; 1024];
|
||||
let (num_entries, bytes) = window.get_entries_bytes(0, 1, &mut buf).unwrap();
|
||||
let bytes = bytes as usize;
|
||||
assert_eq!(num_entries, 1);
|
||||
let entry: Entry = deserialize(&buf[size_of::<u64>()..bytes]).unwrap();
|
||||
assert_eq!(entry, entries[0]);
|
||||
|
||||
let (num_entries, bytes2) = window.get_entries_bytes(0, 2, &mut buf).unwrap();
|
||||
let bytes2 = bytes2 as usize;
|
||||
assert_eq!(num_entries, 2);
|
||||
assert!(bytes2 > bytes);
|
||||
for (i, ref entry) in entries.iter().enumerate() {
|
||||
info!("entry[{}] = {:?}", i, entry.id);
|
||||
}
|
||||
|
||||
let entry: Entry = deserialize(&buf[size_of::<u64>()..bytes]).unwrap();
|
||||
assert_eq!(entry, entries[0]);
|
||||
|
||||
let entry: Entry = deserialize(&buf[bytes + size_of::<u64>()..bytes2]).unwrap();
|
||||
assert_eq!(entry, entries[1]);
|
||||
|
||||
// buf size part-way into entry[1], should just return entry[0]
|
||||
let mut buf = vec![0; bytes + size_of::<u64>() + 1];
|
||||
let (num_entries, bytes3) = window.get_entries_bytes(0, 2, &mut buf).unwrap();
|
||||
assert_eq!(num_entries, 1);
|
||||
let bytes3 = bytes3 as usize;
|
||||
assert_eq!(bytes3, bytes);
|
||||
|
||||
let mut buf = vec![0; bytes2 - 1];
|
||||
let (num_entries, bytes4) = window.get_entries_bytes(0, 2, &mut buf).unwrap();
|
||||
assert_eq!(num_entries, 1);
|
||||
let bytes4 = bytes4 as usize;
|
||||
assert_eq!(bytes4, bytes);
|
||||
|
||||
let mut buf = vec![0; bytes + size_of::<u64>() - 1];
|
||||
let (num_entries, bytes5) = window.get_entries_bytes(0, 2, &mut buf).unwrap();
|
||||
assert_eq!(num_entries, 1);
|
||||
let bytes5 = bytes5 as usize;
|
||||
assert_eq!(bytes5, bytes);
|
||||
|
||||
let mut buf = vec![0; bytes * 2];
|
||||
let (num_entries, bytes6) = window.get_entries_bytes(9, 1, &mut buf).unwrap();
|
||||
assert_eq!(num_entries, 1);
|
||||
let bytes6 = bytes6 as usize;
|
||||
|
||||
let entry: Entry = deserialize(&buf[size_of::<u64>()..bytes6]).unwrap();
|
||||
assert_eq!(entry, entries[9]);
|
||||
|
||||
// Read out of range
|
||||
assert!(window.get_entries_bytes(20, 2, &mut buf).is_err());
|
||||
|
||||
let _ignored = remove_dir_all(&ledger_path);
|
||||
}
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue