linux-kernel - Re: [PATCH net-next v20 20/25] ovpn: implement peer add/get/dump/delete via netlink

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Message-ID: <e640386e-46dd-4215-8824-751fc6655ed4@openvpn.net>
Date: Sun, 2 Mar 2025 22:00:43 +0100
From: Antonio Quartulli <antonio@...nvpn.net>
To: Sabrina Dubroca <sd@...asysnail.net>
Cc: netdev@...r.kernel.org, Eric Dumazet <edumazet@...gle.com>,
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
 Donald Hunter <donald.hunter@...il.com>, Shuah Khan <shuah@...nel.org>,
 ryazanov.s.a@...il.com, Andrew Lunn <andrew+netdev@...n.ch>,
 Simon Horman <horms@...nel.org>, linux-kernel@...r.kernel.org,
 linux-kselftest@...r.kernel.org, Xiao Liang <shaw.leon@...il.com>
Subject: Re: [PATCH net-next v20 20/25] ovpn: implement peer
 add/get/dump/delete via netlink



On 02/03/2025 19:24, Sabrina Dubroca wrote:
> 2025-02-27, 02:21:45 +0100, Antonio Quartulli wrote:
>> @@ -1310,9 +1329,12 @@ void ovpn_peer_keepalive_work(struct work_struct *work)
>>   	if (next_run > 0 && ovpn->registered) {
>>   		netdev_dbg(ovpn->dev,
>>   			   "scheduling keepalive work: now=%llu next_run=%llu delta=%llu\n",
>> -			   next_run, now, next_run - now);
>> +			   next_run, now, next_run - now ?: 0);
> 
> nit: I don't think this "?: 0" does anything

Ouch, I missed the ">= 0".
The idea is that now may have outgrown next_run and in that case we must 
reschedule the worker immediately (while also avoid passing a negative 
number as delay).


Will get this fixed.

Cheers,

> 
>> +		/* due to the waiting above, the next_run deadline may have
>> +		 * passed: in this case we reschedule the worker immediately
>> +		 */
>>   		schedule_delayed_work(&ovpn->keepalive_work,
>> -				      (next_run - now) * HZ);
>> +				      (next_run - now) * HZ ?: 0);
> 
> nit: same here
> 

-- 
Antonio Quartulli
OpenVPN Inc.