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[2604:1380:4601:e00::3]) by mx.google.com with ESMTPS id p28-20020a50cd9c000000b0054bfa9b3fd2si716112edi.107.2023.11.30.08.22.52 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Nov 2023 08:22:53 -0800 (PST) Received-SPF: pass (google.com: domain of linux-nfs+bounces-212-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) client-ip=2604:1380:4601:e00::3; Authentication-Results: mx.google.com; dkim=pass header.i=@kernel.org header.s=k20201202 header.b="gmtj/ISj"; spf=pass (google.com: domain of linux-nfs+bounces-212-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:4601:e00::3 as permitted sender) smtp.mailfrom="linux-nfs+bounces-212-linux.lists.archive=gmail.com@vger.kernel.org"; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=kernel.org Received: from smtp.subspace.kernel.org (wormhole.subspace.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by am.mirrors.kernel.org (Postfix) with ESMTPS id B9E6F1F20CD5 for ; Thu, 30 Nov 2023 16:22:52 +0000 (UTC) Received: from localhost.localdomain (localhost.localdomain [127.0.0.1]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 444BC54F89; Thu, 30 Nov 2023 16:22:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="gmtj/ISj" X-Original-To: linux-nfs@vger.kernel.org Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1CE12495C2; Thu, 30 Nov 2023 16:22:49 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id F0F59C433C7; Thu, 30 Nov 2023 16:22:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1701361369; bh=d4l4nsa6R1/BrIWOF0U6+9/a+qCHtANBIgP9s3m8/7o=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=gmtj/ISjsrGcQKmPPP/RAaHgIk2EZ3f6jeBtV4IJmgA88fUEenASii+AP/2uHZVH2 gV8zk+B6r6AL+9qjCoLKf2mW7hHQATimv0NuouXSQ7EcsX1fmac4/4/E90vhvCuj0K AYjLBkvg26BhDKYeeUWzHgUKsjBO+bXk9o046sxLzmFSDNsALidZCqCzrqu7DAj9p6 Tse1Jz9m19UKLq7KibNTk56nKVEsusduRhQCFAVNaY3TgIVjuGIteHzuJgRFJHWwJ7 rt7Uf2R8JIKM7rn5NDqe6dQ32IiS+BJKCxgWIgbJGax0OhA1FJc1g1vtV51kUZpdBF CcuvzL9hb3cDA== Message-ID: Subject: Re: [PATCH v5 3/3] NFSD: convert write_ports to netlink command From: Jeff Layton To: Lorenzo Bianconi Cc: linux-nfs@vger.kernel.org, lorenzo.bianconi@redhat.com, neilb@suse.de, netdev@vger.kernel.org, kuba@kernel.org Date: Thu, 30 Nov 2023 11:22:47 -0500 In-Reply-To: References: <67251eabfbbccb806991e6437ebcf1cf00166017.1701277475.git.lorenzo@kernel.org> <7b21c962c2a6c552c9807d6f382e1097da4ba748.camel@kernel.org> Autocrypt: addr=jlayton@kernel.org; prefer-encrypt=mutual; keydata=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QiErRVPpB7VzA/pYV5Mdy7GMbPjmO0IpoL0tVZ8JvUzUZXB3ErS/dJflvboAAQeLpLCkQjqZiQ/DCmgJCrBJst9Xc7YsKKS379Tc3GU33HNSpaOxs2NwfzoesyjKU+P35czvXWTtj7KVVSj3SgzzFk+gLx8y2Nvt9iESdZ1Ustv8tipDsGcvIZ43MQwqU9YbLg8k4V9ch+Mo8SE+C0jyZYDCE2ZGf3OztvtSYMsTnF6/luzVyej1AFVYjKHORzNoTwdHUeC+9/07GO0bMYTPXYvJ/vxBFm3oniXyhgb5FtABEBAAGJAh8EGAECAAkFAk6V0TwCGwwACgkQAA5oQRlWghXhZRAAyycZ2DDyXh2bMYvI8uHgCbeXfL3QCvcw2XoZTH2l2umPiTzrCsDJhgwZfG9BDyOHaYhPasd5qgrUBtjjUiNKjVM+Cx1DnieR0dZWafnqGv682avPblfi70XXr2juRE/fSZoZkyZhm+nsLuIcXTnzY4D572JGrpRMTpNpGmitBdh1l/9O7Fb64uLOtA5Qj5jcHHOjL0DZpjmFWYKlSAHmURHrE8M0qRryQXvlhoQxlJR4nvQrjOPMsqWD5F9mcRyowOzr8amasLv43w92rD2nHoBK6rbFE/qC7AAjABEsZq8+TQmueN0maIXUQu7TBzejsEbV0i29z+kkrjU2NmK5pcxgAtehVxpZJ14LqmN6E0suTtzjNT1eMoqOPrMSx+6vOCIuvJ/MVYnQgHhjtPPnU86mebTY5Loy9YfJAC2EVpxtcCbx2KiwErTndEyWL+GL53LuScUD7tW8vYbGIp4RlnUgPLbqpgssq2gwYO9m75FGuKuB2+2bCGajqalid5nzeq9v7cYLLRgArJfOIBWZrHy2m0C+pFu9DSuV6SNr2dvMQUv1V58h0FaSOxHVQnJdnoHn13g/CKKvyg2EMrMt/EfcXgvDwQbnG9we4xJiWOIOcsvrWcB6C6lWBDA+In7w7SXnnok kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.1 (3.50.1-1.fc39) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Thu, 2023-11-30 at 10:57 +0100, Lorenzo Bianconi wrote: > > >=20 > > > +/* =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D NFSD_CMD_LISTENER_STAR= T =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D */ > > > +/* NFSD_CMD_LISTENER_START - do */ > > > +struct nfsd_listener_start_req { > > > + struct { > > > + __u32 transport_name_len; > > > + __u32 port:1; > > > + } _present; > > > + > > > + char *transport_name; > > > + __u32 port; > > > +}; > >=20 > > How do you deconfigure a listener with this interface? i.e. suppose I > > want to stop nfsd from listening on a particular port? I think this too > > is a place where a declarative interface would be better: >=20 > Is it possible with current APIs? as for 2/3 so far I have just added net= link > counter for current implementation but I am fine to change the logic here= to > better APIs. >=20 > >=20 No, I don't think you can do this with the current API at all. I consider it a major deficiency. I don't think we want to repeat that mistake in the new interface. > > Have userland send down a list of the ports that we should currently be > > listening on, and let the kernel do the work to match the request. Agai= n > > too, an empty list could mean "close everything". > >=20 > >=20 --=20 Jeff Layton