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network: do not send too many netlink messages in a single event

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Fixes #26743.
This commit is contained in:
Yu Watanabe 2023-11-30 19:07:36 +09:00
parent b3a4f4f06d
commit 4e6a35e2b2
1 changed files with 9 additions and 0 deletions
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9
src/network/networkd-queue.c
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@ -7,6 +7,8 @@
#include "networkd-queue.h"
#include "string-table.h"
#define REPLY_CALLBACK_COUNT_THRESHOLD 128
static Request *request_free(Request *req) {
if (!req)
return NULL;
@ -220,6 +222,13 @@ int manager_process_requests(sd_event_source *s, void *userdata) {
if (req->waiting_reply)
continue; /* Waiting for netlink reply. */
/* Typically, requests send netlink message asynchronously. If there are many requests
* queued, then this event may make reply callback queue in sd-netlink full. */
if (netlink_get_reply_callback_count(manager->rtnl) >= REPLY_CALLBACK_COUNT_THRESHOLD ||
netlink_get_reply_callback_count(manager->genl) >= REPLY_CALLBACK_COUNT_THRESHOLD ||
fw_ctx_get_reply_callback_count(manager->fw_ctx) >= REPLY_CALLBACK_COUNT_THRESHOLD)
return 0;
r = req->process(req, link, req->userdata);
if (r == 0)
continue;