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bh=SB+YYIGPMZjdzoE7UdXHrZR3Vdc1Oo5zQFlONXQjOBw=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=O/sjxkIoNEbvChOIebXaZmwa3p9dc/xNC/a9yWFc3QnSOThdhTC12gRVdqAgWcvwj rO6Wg2Hzk7VLmmZTuFJbNv4Ae5kK2+eC/7kns6kA2oi+QT88W2j8Iw0kg9yEKUv5ag DrBSI02AkkNzCQyaf4EtywJjazdDaAOUCNYA3OuGkTQ88LlN5S183N5LBlyHEhZWLb nppLmD8G/uRQc6mf64U8JAKfpObaHNjiXOEylbRt0yjdLLxniM7bBuJ1W4gm+spgsw LiPMrB/eR1QbMEA5BU/UHu/3Gggu3sDqWV76Yzm7UaZD87CZHm7GakJyrW29xt2S+/ ScmCsbWelpYCg== Message-ID: <8eaf2c6b79842e4b932b72ae3f402eaffe219c64.camel@kernel.org> Subject: Re: [PATCH v6 3/3] NFSD: add write_ports to netlink command From: Jeff Layton To: NeilBrown Cc: Lorenzo Bianconi , linux-nfs@vger.kernel.org, lorenzo.bianconi@redhat.com, kuba@kernel.org, chuck.lever@oracle.com, horms@kernel.org, netdev@vger.kernel.org Date: Mon, 22 Jan 2024 16:37:28 -0500 In-Reply-To: <170595930799.23031.17998490973211605470@noble.neil.brown.name> References: , , <9e3ae337dcf168c60c4cfd51aa0b2fc7b24bcbfb.camel@kernel.org> 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 kZWuOsJdJQdmwlWC5L5ln9xgfr/4mOY38B0U= Content-Type: text/plain; charset="ISO-8859-15" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.50.3 (3.50.3-1.fc39) Precedence: bulk X-Mailing-List: linux-nfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2024-01-23 at 08:35 +1100, NeilBrown wrote: > On Tue, 23 Jan 2024, Jeff Layton wrote: > > On Sat, 2024-01-20 at 18:33 +0100, Lorenzo Bianconi wrote: > > > Introduce write_ports netlink command. For listener-set, userspace is > > > expected to provide a NFS listeners list it wants to enable (all the > > > other ports will be closed). > > >=20 > >=20 > > Ditto here. This is a change to a declarative interface, which I think > > is a better way to handle this, but we should be aware of the change. >=20 > I agree it is better, and thanks for highlighting the change. >=20 > > > + /* 2- remove stale listeners */ > >=20 > >=20 > > The old portlist interface was weird, in that it was only additive. You > > couldn't use it to close a listening socket (AFAICT). We may be able to > > support that now with this interface, but we'll need to test that case > > carefully. >=20 > Do we ever want/need to remove listening sockets? > Normal practice when making any changes is to stop and restart where > "stop" removes all sockets, unexports all filesystems, disables all > versions. > I don't exactly object to supporting fine-grained changes, but I suspect > anything that is not used by normal service start will hardly ever be > used in practice, so will not be tested. >=20 > So if it is easiest to support reverting previous configuration (as it > probably is for version setting), then do so. But if there is any > complexity (as maybe there is with listening sockets), then don't > add complexity that won't be used. >=20 I completely agree here. It's probably simplest to just prevent this for now unless and until there is some need for it. --=20 Jeff Layton