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restrictcommands: cache the parsed restriction list (config_gen-tagged) instead of re-tokenizing every restrictcommand line on every command; clone only the one matched rule so the ext borrow drops before the server is used mutably

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This commit is contained in:
Jean Chevronnet 2026-08-19 01:54:45 +00:00
parent cd46cfc49f
commit d4d3886379
1 changed files with 23 additions and 5 deletions
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28
src/modules/restrictcommands.rs
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@ -15,6 +15,7 @@ use crate::server::{now, Server};
use crate::Uid;
/// One parsed `restrictcommand` line.
#[derive(Clone)]
struct Restriction {
command: String, // uppercased
connectdelay: u64,
@ -95,6 +96,13 @@ fn parse(s: &Server) -> Vec<Restriction> {
out
}
/// Parsed restrictions cached against the config generation they were parsed at.
#[derive(Default)]
struct RestrictCache {
gen: u64,
rules: Vec<Restriction>,
}
pub struct RestrictCommands;
impl Module for RestrictCommands {
@ -113,11 +121,21 @@ impl Module for RestrictCommands {
if srv.conf_all("restrictcommand").is_empty() {
return ModResult::Passthru;
}
let restrictions = parse(srv);
let Some(r) = restrictions
.iter()
.find(|r| r.command.eq_ignore_ascii_case(cmd))
else {
// cache the parsed restrictions (config_gen-tagged); re-parse only on rehash,
// not on every command. Clone the one matched rule so the ext borrow drops
// before we touch the server mutably below.
let gen = srv.config_gen;
let stale = srv.ext.get::<RestrictCache>().map(|c| c.gen != gen).unwrap_or(true);
if stale {
let rules = parse(srv);
srv.ext.set(RestrictCache { gen, rules });
}
let Some(r) = srv.ext.get::<RestrictCache>().and_then(|c| {
c.rules
.iter()
.find(|r| r.command.eq_ignore_ascii_case(cmd))
.cloned()
}) else {
return ModResult::Passthru;
};