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@ -30,7 +30,7 @@ mod tests;
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use {
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crate::{
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engine::{
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error::StorageError,
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error::{ErrorKind, StorageError},
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mem::unsafe_apis::memcpy,
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storage::common::{
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checksum::SCrc64,
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@ -44,7 +44,7 @@ use {
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util::compiler::TaggedEnum,
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},
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core::fmt,
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std::ops::Range,
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std::{io::ErrorKind as IoErrorKind, ops::Range},
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};
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/*
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@ -67,12 +67,13 @@ where
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pub fn open_journal<J: RawJournalAdapter>(
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log_path: &str,
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gs: &J::GlobalState,
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settings: JournalSettings,
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) -> RuntimeResult<RawJournalWriter<J>>
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where
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J::Spec: FileSpecV1<DecodeArgs = ()>,
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{
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let log = SdssFile::<J::Spec>::open(log_path)?;
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let (initializer, file) = RawJournalReader::<J>::scroll(log, gs)?;
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let (initializer, file) = RawJournalReader::<J>::scroll(log, gs, settings)?;
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RawJournalWriter::new(initializer, file)
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}
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@ -640,6 +641,22 @@ pub struct RawJournalReader<J: RawJournalAdapter> {
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last_txn_offset: u64,
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last_txn_checksum: u64,
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stats: JournalStats,
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_settings: JournalSettings,
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}
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#[derive(Debug)]
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pub struct JournalSettings {}
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impl Default for JournalSettings {
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fn default() -> Self {
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Self::new()
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}
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}
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impl JournalSettings {
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pub fn new() -> Self {
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Self {}
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}
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}
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#[derive(Debug)]
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@ -658,28 +675,33 @@ impl JournalStats {
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}
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impl<J: RawJournalAdapter> RawJournalReader<J> {
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pub fn scroll(
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fn scroll(
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file: SdssFile<<J as RawJournalAdapter>::Spec>,
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gs: &J::GlobalState,
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settings: JournalSettings,
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) -> RuntimeResult<(JournalInitializer, SdssFile<J::Spec>)> {
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let reader = TrackedReader::with_cursor(
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file,
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<<J as RawJournalAdapter>::Spec as FileSpecV1>::SIZE as u64,
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)?;
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jtrace_reader!(Initialized);
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let mut me = Self::new(reader, 0, 0, 0, 0);
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let mut me = Self::new(reader, 0, 0, 0, 0, settings);
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loop {
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if me._apply_next_event_and_stop(gs)? {
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jtrace_reader!(Completed);
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let initializer = JournalInitializer::new(
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me.tr.cursor(),
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me.tr.checksum(),
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me.txn_id,
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// NB: the last txn offset is important because it indicates that the log is new
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me.last_txn_offset,
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);
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let file = me.tr.into_inner();
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return Ok((initializer, file));
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match me._apply_next_event_and_stop(gs) {
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Ok(true) => {
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jtrace_reader!(Completed);
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let initializer = JournalInitializer::new(
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me.tr.cursor(),
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me.tr.checksum(),
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me.txn_id,
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// NB: the last txn offset is important because it indicates that the log is new
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me.last_txn_offset,
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);
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let file = me.tr.into_inner();
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return Ok((initializer, file));
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}
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Ok(false) => {}
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Err(e) => return Err(e),
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}
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}
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}
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@ -689,6 +711,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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last_txn_id: u64,
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last_txn_offset: u64,
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last_txn_checksum: u64,
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settings: JournalSettings,
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) -> Self {
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Self {
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tr: reader,
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@ -697,6 +720,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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last_txn_offset,
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last_txn_checksum,
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stats: JournalStats::new(),
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_settings: settings,
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}
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}
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fn __refresh_known_txn(me: &mut Self) {
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@ -707,6 +731,47 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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}
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}
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#[derive(Debug, PartialEq)]
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pub enum JournalRepairMode {
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Simple,
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}
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impl<J: RawJournalAdapter> RawJournalReader<J> {
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pub fn repair(
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file: SdssFile<<J as RawJournalAdapter>::Spec>,
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gs: &J::GlobalState,
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settings: JournalSettings,
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repair_mode: JournalRepairMode,
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) -> RuntimeResult<()> {
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match repair_mode {
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JournalRepairMode::Simple => {}
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}
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match Self::scroll(file, gs, settings) {
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Ok(_) => {
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// no error detected
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return Ok(());
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}
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Err(e) => {
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// now it's our task to determine exactly what happened
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match e.kind() {
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ErrorKind::IoError(io) => match io.kind() {
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IoErrorKind::UnexpectedEof => {
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// this is the only kind of error that we can actually repair since it indicates that a part of the
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// file is "missing"
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}
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_ => return Err(e),
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},
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ErrorKind::Storage(_) => todo!(),
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ErrorKind::Txn(_) => todo!(),
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ErrorKind::Other(_) => todo!(),
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ErrorKind::Config(_) => unreachable!(),
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}
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}
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}
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todo!()
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}
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}
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impl<J: RawJournalAdapter> RawJournalReader<J> {
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fn _apply_next_event_and_stop(&mut self, gs: &J::GlobalState) -> RuntimeResult<bool> {
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let txn_id = u128::from_le_bytes(self.tr.read_block()?);
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@ -716,7 +781,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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expected: self.txn_id,
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current: txn_id as u64
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});
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return Err(StorageError::RawJournalEventCorruptedMetadata.into());
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return Err(StorageError::RawJournalDecodeEventCorruptedMetadata.into());
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}
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jtrace_reader!(AttemptingEvent(txn_id as u64));
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// check for a server event
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@ -740,7 +805,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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Err(e) => return Err(e),
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}
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}
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None => return Err(StorageError::RawJournalEventCorruptedMetadata.into()),
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None => return Err(StorageError::RawJournalDecodeEventCorruptedMetadata.into()),
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}
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}
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return self.handle_close(txn_id, meta);
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@ -772,9 +837,9 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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..
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}) => {
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jtrace_reader!(ErrExpectedCloseGotReopen);
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return Err(StorageError::RawJournalInvalidEvent.into());
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return Err(StorageError::RawJournalDecodeInvalidEvent.into());
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}
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None => return Err(StorageError::RawJournalEventCorrupted.into()),
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None => return Err(StorageError::RawJournalDecodeEventCorruptedPayload.into()),
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};
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jtrace_reader!(DriverEventExpectedCloseGotClose);
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// a driver closed event; we've checked integrity, but we must check the field values
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@ -787,7 +852,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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jtrace_reader!(DriverEventInvalidMetadata);
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// either the block is corrupted or the data we read is corrupted; either way,
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// we're going to refuse to read this
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return Err(StorageError::RawJournalCorrupted.into());
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return Err(StorageError::RawJournalDecodeEventCorruptedMetadata.into());
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}
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self.stats.driver_events += 1;
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// update
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@ -807,7 +872,8 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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let event_block = self.tr.read_block::<{ DriverEvent::FULL_EVENT_SIZE }>()?;
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let reopen_event = match DriverEvent::decode(event_block) {
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Some(ev) if ev.event == DriverEventKind::Reopened => ev,
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None | Some(_) => return Err(StorageError::RawJournalEventCorrupted.into()),
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Some(_) => return Err(StorageError::RawJournalDecodeInvalidEvent.into()),
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None => return Err(StorageError::RawJournalDecodeEventCorruptedPayload.into()),
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};
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jtrace_reader!(DriverEventExpectingReopenGotReopen);
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let valid_meta = okay! {
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@ -824,7 +890,7 @@ impl<J: RawJournalAdapter> RawJournalReader<J> {
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Ok(false)
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} else {
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jtrace_reader!(ErrInvalidReopenMetadata);
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Err(StorageError::RawJournalCorrupted.into())
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Err(StorageError::RawJournalDecodeEventCorruptedMetadata.into())
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}
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}
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}
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Sayan Nandan
6 months ago