lora_wal/
error.rs

1use std::io;
2use std::path::PathBuf;
3
4use thiserror::Error;
5
6use crate::lsn::Lsn;
7
8/// Failure modes for WAL operations.
9///
10/// Errors from the append path are surfaced through [`WalSink::append`] /
11/// [`WalSink::commit`] / [`WalSink::flush`] (defined in `wal.rs`, not yet
12/// implemented). Errors from replay are surfaced through `WalReplay`. The
13/// distinction matters because a recorder error needs to *poison* the
14/// engine's write critical section, whereas a replay error happens at
15/// boot, before queries are accepted.
16#[derive(Debug, Error)]
17pub enum WalError {
18    #[error("WAL I/O error: {0}")]
19    Io(#[from] io::Error),
20
21    #[error("WAL record could not be encoded: {0}")]
22    Encode(String),
23
24    #[error("WAL record could not be decoded: {0}")]
25    Decode(String),
26
27    #[error("WAL record CRC mismatch at lsn {lsn}: expected 0x{expected:08x}, got 0x{actual:08x}")]
28    CrcMismatch {
29        lsn: Lsn,
30        expected: u32,
31        actual: u32,
32    },
33
34    #[error("WAL record truncated: expected {expected} bytes, got {actual}")]
35    Truncated { expected: usize, actual: usize },
36
37    #[error("unknown WAL record kind: {0}")]
38    UnknownKind(u8),
39
40    #[error("WAL segment header is malformed: {0}")]
41    BadSegmentHeader(&'static str),
42
43    #[error("WAL structure is malformed: {0}")]
44    Malformed(String),
45
46    #[error("WAL directory is already open by another live handle: {dir}")]
47    AlreadyOpen { dir: PathBuf },
48
49    #[error("WAL is poisoned: a previous append failed and the log is no longer durable")]
50    Poisoned,
51}
lora_wal/error.rs

lora_wal/
error.rs
