rust/neon
1
0
Fork 0
mirror of https://github.com/neondatabase/neon.git synced 2026-06-01 20:40:37 +00:00
Code Issues Packages Projects Releases Wiki Activity

Calculate postgres checksum for FPI stored in pageserver (neondatabase/cloud#536)

Browse Source
This commit is contained in:
Konstantin Knizhnik
2022-02-16 13:16:35 +03:00
committed by Alexey Kondratov
parent ae116ff0a9
commit 2501afba6e
4 changed files with 85 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
libs/postgres_ffi/src/lib.rs
View File

@@ -9,6 +9,7 @@
use serde::{Deserialize, Serialize};
use utils::lsn::Lsn;
use utils::pg_checksum_page::pg_checksum_page;
include!(concat!(env!("OUT_DIR"), "/bindings.rs"));
@@ -56,3 +57,11 @@ pub fn page_set_lsn(pg: &mut [u8], lsn: Lsn) {
pg[0..4].copy_from_slice(&((lsn.0 >> 32) as u32).to_le_bytes());
pg[4..8].copy_from_slice(&(lsn.0 as u32).to_le_bytes());
}
/// Calculate page checksum and stamp it onto the page.
/// NB: this will zero out and ignore any existing checksum.
pub fn page_set_checksum(page: &mut [u8], blkno: u32) {
page[8..10].copy_from_slice(&[0u8; 2]);
let checksum = pg_checksum_page(page, blkno);
page[8..10].copy_from_slice(&checksum.to_le_bytes());
}