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Accept overquota TCP connection on local thread if possible

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If the quota callback is called on a thread matching the socket, call
the TCP accept function directly instead of using isc_async_run() which
allocates-deallocates memory.
This commit is contained in:
Ondřej Surý 2023-04-08 13:54:52 +02:00
parent 0a468e7c9e
commit d27f6f2d68
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GPG Key ID: 2820F37E873DEA41
1 changed files with 9 additions and 2 deletions
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11
lib/isc/netmgr/tcp.c
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@ -865,8 +865,15 @@ quota_accept_cb(isc_quota_t *quota, void *arg) {
* This needs to be asynchronous, because the quota might have been
* released by a different child socket.
*/
isc__nmsocket_attach(sock, &(isc_nmsocket_t *){ NULL });
isc_async_run(sock->worker->loop, tcpaccept_cb, sock);
if (sock->tid == isc_tid()) {
isc_result_t result = accept_connection(sock);
isc__nm_accept_connection_log(sock, result,
can_log_tcp_quota());
sock->pquota = NULL;
} else {
isc__nmsocket_attach(sock, &(isc_nmsocket_t *){ NULL });
isc_async_run(sock->worker->loop, tcpaccept_cb, sock);
}
}
static isc_result_t