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Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Shuah Khan , linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, Jack Ma Subject: Re: [PATCH net-next v2 1/3] net: nexthop: add NHA_FDB_PORT for fdb nexthops Date: Tue, 21 Jul 2026 22:19:05 +0000 Message-ID: <20260721221907.2702-1-jack4it@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260721151741.GA2667735@shredder> References: <20260717-b4-vxlan-fdb-port-v2-0-f4862e8fe867@gmail.com> <20260717-b4-vxlan-fdb-port-v2-1-f4862e8fe867@gmail.com> <20260721151741.GA2667735@shredder> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On Tue, Jul 21, 2026 at 06:17:41PM +0300, Ido Schimmel wrote: > Maybe NLA_POLICY_MIN(NLA_BE16, 1) given that it's BE16 and that we don't > dump / use a destination port of 0? Done for v3. Switched the NHA_FDB_PORT policy to NLA_POLICY_MIN(NLA_BE16, 1), so the core rejects a zero destination port for us; the "fdb + gateway" requirement stays in rtm_to_nh_config(). > Why not nhi->fdb_port ? Good catch. Fixed for v3: nh_nlmsg_size_single() now reserves the NHA_FDB_PORT space under "if (nhi->fdb_port)", matching the emit condition in nh_fill_node() so the size calculation and the dump agree and space is only reserved when a port is actually set. Thanks, Jack