From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8C28BC34049 for ; Tue, 18 Feb 2020 20:35:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 6F47E2067D for ; Tue, 18 Feb 2020 20:35:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726742AbgBRUfr (ORCPT ); Tue, 18 Feb 2020 15:35:47 -0500 Received: from shards.monkeyblade.net ([23.128.96.9]:36920 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726283AbgBRUfr (ORCPT ); Tue, 18 Feb 2020 15:35:47 -0500 Received: from localhost (unknown [IPv6:2601:601:9f00:477::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id C843712357E95; Tue, 18 Feb 2020 12:35:46 -0800 (PST) Date: Tue, 18 Feb 2020 12:35:46 -0800 (PST) Message-Id: <20200218.123546.666027846950664712.davem@davemloft.net> To: danielwa@cisco.com Cc: zbr@ioremap.net, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] drivers: connector: cn_proc: allow limiting certain messages From: David Miller In-Reply-To: <20200218163030.GR24152@zorba> References: <20200217175209.GM24152@zorba> <20200217.185235.495219494110132658.davem@davemloft.net> <20200218163030.GR24152@zorba> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Tue, 18 Feb 2020 12:35:47 -0800 (PST) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: "Daniel Walker (danielwa)" Date: Tue, 18 Feb 2020 16:30:36 +0000 > It's multicast and essentially broadcast messages .. So everyone gets every > message, and once it's on it's likely it won't be turned off. Given that, It seems > appropriate that the system administrator has control of what messages if any > are sent, and it should effect all listening for messages. > > I think I would agree with you if this was unicast, and each listener could tailor > what messages they want to get. However, this interface isn't that, and it would > be considerable work to convert to that. You filter at recvmsg() on the specific socket, multicast or not, I don't understand what the issue is.