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[46.138.187.224]) by smtp.gmail.com with ESMTPSA id 38308e7fff4ca-3a37058669fsm26853201fa.17.2026.09.07.06.35.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 07 Sep 2026 06:35:17 -0700 (PDT) From: Artem Lytkin To: Nikolay Aleksandrov Cc: netdev@vger.kernel.org, bridge@lists.linux.dev, Ido Schimmel , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , "David S. Miller" Subject: Re: [PATCH net-next] net: bridge: bound the port VLAN lists in the IFLA_AF_SPEC nest Date: Mon, 7 Sep 2026 16:35:04 +0300 Message-ID: <20260907133505.5291-1-iprintercanon@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: <20260906224246.21719-1-iprintercanon@gmail.com> Precedence: bulk X-Mailing-List: bridge@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Mon, Sep 07, 2026 at 11:47:24AM +0300, Nikolay Aleksandrov wrote: > I prefer a more explicit path - return error for both (RTM_GETLINK and notifications) > you'll have to plumb down extack but then user-space will know there are too many objects or lost > RTNL_LINK notifications and it should resync (e.g. use RTM_GETVLAN to dump the vlans if needed). OK, v2 will do that: br_fill_ifinfo() fails with -E2BIG once the nest would pass 65535, kept distinct from -EMSGSIZE so the WARN_ON in br_info_notify() still means what it means today and the error goes to rtnl_set_sk_err(). For the dump, rtnl_bridge_getlink() can turn -E2BIG into the extack message itself, which keeps ndo_bridge_getlink() as it is; or do you want extack plumbed through the ndo? The size clamp and the doc text go away. Artem