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[78.154.14.127]) by smtp.gmail.com with UTF8SMTPSA id ffacd0b85a97d-48b029d99bbsm1222968f8f.16.2026.09.30.00.14.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Sep 2026 00:14:57 -0700 (PDT) From: Nikolay Aleksandrov To: netdev@vger.kernel.org Cc: idosch@nvidia.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, horms@kernel.org, bridge@lists.linux.dev, Nikolay Aleksandrov Subject: [PATCH net-next 01/12] net: bridge: introduce a bridge destination type Date: Wed, 30 Sep 2026 10:14:00 +0300 Message-ID: <20260930071411.2786201-2-razor@blackwall.org> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260930071411.2786201-1-razor@blackwall.org> References: <20260930071411.2786201-1-razor@blackwall.org> Precedence: bulk X-Mailing-List: bridge@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Add an opaque destination type and helpers for representing bridge port destinations. Using a separate structure makes raw pointer assignments and comparisons fail at build time while marking its value member __private makes sparse warn about accesses that bypass the helpers. Reviewed-by: Ido Schimmel Signed-off-by: Nikolay Aleksandrov --- net/bridge/br_private.h | 38 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 67117fb3dc88..1146187aa2ba 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -306,6 +306,10 @@ struct net_bridge_fdb_key { u16 vlan_id; }; +struct net_bridge_dst { + unsigned long __private value; +}; + struct net_bridge_fdb_entry { struct rhash_head rhnode; struct net_bridge_port *dst; @@ -670,6 +674,40 @@ struct br_input_skb_cb { #define br_debug(br, format, args...) \ pr_debug("%s: " format, (br)->dev->name, ##args) +static inline struct net_bridge_dst +br_dst_read(const struct net_bridge_dst *src) +{ + struct net_bridge_dst dst; + + ACCESS_PRIVATE(&dst, value) = + READ_ONCE(ACCESS_PRIVATE(src, value)); + + return dst; +} + +static inline void br_dst_write(struct net_bridge_dst *dst, + struct net_bridge_dst src) +{ + WRITE_ONCE(ACCESS_PRIVATE(dst, value), + ACCESS_PRIVATE(&src, value)); +} + +static inline struct net_bridge_dst +br_port_to_dst(const struct net_bridge_port *p) +{ + struct net_bridge_dst dst; + + ACCESS_PRIVATE(&dst, value) = (unsigned long)p; + + return dst; +} + +static inline struct net_bridge_port * +br_dst_port(struct net_bridge_dst dst) +{ + return (struct net_bridge_port *)ACCESS_PRIVATE(&dst, value); +} + /* called under bridge lock */ static inline int br_is_root_bridge(const struct net_bridge *br) { -- 2.47.3