From patchwork Tue Oct 6 14:53:30 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Henrik Bjoernlund X-Patchwork-Id: 1377485 X-Patchwork-Delegate: davem@davemloft.net Return-Path: X-Original-To: patchwork-incoming-netdev@ozlabs.org Delivered-To: patchwork-incoming-netdev@ozlabs.org Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org (client-ip=23.128.96.18; helo=vger.kernel.org; envelope-from=netdev-owner@vger.kernel.org; receiver=) Authentication-Results: ozlabs.org; dmarc=fail (p=quarantine dis=none) header.from=microchip.com Authentication-Results: ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=microchip.com header.i=@microchip.com header.a=rsa-sha256 header.s=mchp header.b=ry4TjXq5; dkim-atps=neutral Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by ozlabs.org (Postfix) with ESMTP id 4C5LBT3CxXz9sTL for ; Wed, 7 Oct 2020 01:56:01 +1100 (AEDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726578AbgJFOzs (ORCPT ); Tue, 6 Oct 2020 10:55:48 -0400 Received: from esa4.microchip.iphmx.com ([68.232.154.123]:45069 "EHLO esa4.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726517AbgJFOzo (ORCPT ); Tue, 6 Oct 2020 10:55:44 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1601996144; x=1633532144; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BNr0fzGMsgnTYsz95Ukwo9ZEuwPvE9qmtjZvnPjh5/M=; b=ry4TjXq5BQSqIgD90pDTrH8rXNwNlzz+9/2jORtwGzsxscsNQO7NmIij 0wEux2gYlw7uh01ExEoRSDp+uP+niz7h/j4CScfqIIDbBoNqizT6ZbMK4 74Gsm2A/9JxKVSZgEbx8TV20xn4wxO5rwkqKyCHnnn7NDrefnMmTWL5uO SMq/t8pRFIkASbmX4baQNjRplnzn9nUazQjq3UR+ssQcNpRlEMpHcjBKO JnEuuc8Xs37J9z2NRdxl5KIEx06Pvzfj8KNzpOsiPgiml1v8lAG0Ak58K Fzd5H/YpTGGiV8ez0KnI3RxktBWdN9Woa7kCCfdUHE8UmUVN9rsNFhjL4 w==; IronPort-SDR: 6MmLTAzIx6pd/qXcpi5Xpe4ia3/Xug22oHk9Tpmdev4MeyyfeGeJp4RlfiBA1LK+5lz/DF7lyk VDlsbt+dZzle8fq+CEBRA0I8UKLQTosjcDvR4B0GK+mi8A5zVBezcLj40t5LXJBMNlYEO2Uv0d qn4mr9HzfGBcZ/AUx27xaXiYMmxbFDYgYjhsshtqEah7ZRfY9L/DddnybePTDAKp0LClUHiZB7 5aiRKQDvEnMahT90Mhvyrk7s46VbEV5WJeo/m8w776GlBXhMNYmTTimK2Ci4I149gPYdjnP7FM 5RI= X-IronPort-AV: E=Sophos;i="5.77,343,1596524400"; d="scan'208";a="89282776" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa4.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 06 Oct 2020 07:55:43 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex01.mchp-main.com (10.10.85.143) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1979.3; Tue, 6 Oct 2020 07:55:32 -0700 Received: from soft-test08.microsemi.net (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1979.3 via Frontend Transport; Tue, 6 Oct 2020 07:55:40 -0700 From: Henrik Bjoernlund To: , , , , , , , , , CC: Henrik Bjoernlund , Horatiu Vultur Subject: [net-next v3 1/9] net: bridge: extend the process of special frames Date: Tue, 6 Oct 2020 14:53:30 +0000 Message-ID: <20201006145338.1956886-2-henrik.bjoernlund@microchip.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20201006145338.1956886-1-henrik.bjoernlund@microchip.com> References: <20201006145338.1956886-1-henrik.bjoernlund@microchip.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org This patch extends the processing of frames in the bridge. Currently MRP frames needs special processing and the current implementation doesn't allow a nice way to process different frame types. Therefore try to improve this by adding a list that contains frame types that need special processing. This list is iterated for each input frame and if there is a match based on frame type then these functions will be called and decide what to do with the frame. It can process the frame then the bridge doesn't need to do anything or don't process so then the bridge will do normal forwarding. Reviewed-by: Horatiu Vultur Signed-off-by: Henrik Bjoernlund --- net/bridge/br_device.c | 1 + net/bridge/br_input.c | 31 ++++++++++++++++++++++++++++++- net/bridge/br_mrp.c | 19 +++++++++++++++---- net/bridge/br_private.h | 18 ++++++++++++------ 4 files changed, 58 insertions(+), 11 deletions(-) diff --git a/net/bridge/br_device.c b/net/bridge/br_device.c index 9a2fb4aa1a10..206c4ba51cd2 100644 --- a/net/bridge/br_device.c +++ b/net/bridge/br_device.c @@ -473,6 +473,7 @@ void br_dev_setup(struct net_device *dev) spin_lock_init(&br->lock); INIT_LIST_HEAD(&br->port_list); INIT_HLIST_HEAD(&br->fdb_list); + INIT_HLIST_HEAD(&br->frame_type_list); #if IS_ENABLED(CONFIG_BRIDGE_MRP) INIT_LIST_HEAD(&br->mrp_list); #endif diff --git a/net/bridge/br_input.c b/net/bridge/br_input.c index 59a318b9f646..8b2638cb550d 100644 --- a/net/bridge/br_input.c +++ b/net/bridge/br_input.c @@ -254,6 +254,21 @@ static int nf_hook_bridge_pre(struct sk_buff *skb, struct sk_buff **pskb) return RX_HANDLER_CONSUMED; } +/* Return 0 if the frame was not processed otherwise 1 + * note: already called with rcu_read_lock + */ +static int br_process_frame_type(struct net_bridge_port *p, + struct sk_buff *skb) +{ + struct br_frame_type *tmp; + + hlist_for_each_entry_rcu(tmp, &p->br->frame_type_list, list) + if (unlikely(tmp->type == skb->protocol)) + return tmp->frame_handler(p, skb); + + return 0; +} + /* * Return NULL if skb is handled * note: already called with rcu_read_lock @@ -343,7 +358,7 @@ static rx_handler_result_t br_handle_frame(struct sk_buff **pskb) } } - if (unlikely(br_mrp_process(p, skb))) + if (unlikely(br_process_frame_type(p, skb))) return RX_HANDLER_PASS; forward: @@ -380,3 +395,17 @@ rx_handler_func_t *br_get_rx_handler(const struct net_device *dev) return br_handle_frame; } + +void br_add_frame(struct net_bridge *br, struct br_frame_type *ft) +{ + hlist_add_head_rcu(&ft->list, &br->frame_type_list); +} + +void br_del_frame(struct net_bridge *br, struct br_frame_type *ft) +{ + struct br_frame_type *tmp; + + hlist_for_each_entry(tmp, &br->frame_type_list, list) + if (ft == tmp) + hlist_del_rcu(&ft->list); +} diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c index b36689e6e7cb..f94d72bb7c32 100644 --- a/net/bridge/br_mrp.c +++ b/net/bridge/br_mrp.c @@ -6,6 +6,13 @@ static const u8 mrp_test_dmac[ETH_ALEN] = { 0x1, 0x15, 0x4e, 0x0, 0x0, 0x1 }; static const u8 mrp_in_test_dmac[ETH_ALEN] = { 0x1, 0x15, 0x4e, 0x0, 0x0, 0x3 }; +static int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); + +static struct br_frame_type mrp_frame_type __read_mostly = { + .type = cpu_to_be16(ETH_P_MRP), + .frame_handler = br_mrp_process, +}; + static bool br_mrp_is_ring_port(struct net_bridge_port *p_port, struct net_bridge_port *s_port, struct net_bridge_port *port) @@ -445,6 +452,9 @@ static void br_mrp_del_impl(struct net_bridge *br, struct br_mrp *mrp) list_del_rcu(&mrp->list); kfree_rcu(mrp, rcu); + + if (list_empty(&br->mrp_list)) + br_del_frame(br, &mrp_frame_type); } /* Adds a new MRP instance. @@ -493,6 +503,9 @@ int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance) spin_unlock_bh(&br->lock); rcu_assign_pointer(mrp->s_port, p); + if (list_empty(&br->mrp_list)) + br_add_frame(br, &mrp_frame_type); + INIT_DELAYED_WORK(&mrp->test_work, br_mrp_test_work_expired); INIT_DELAYED_WORK(&mrp->in_test_work, br_mrp_in_test_work_expired); list_add_tail_rcu(&mrp->list, &br->mrp_list); @@ -1172,15 +1185,13 @@ static int br_mrp_rcv(struct net_bridge_port *p, * normal forwarding. * note: already called with rcu_read_lock */ -int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) +static int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) { /* If there is no MRP instance do normal forwarding */ if (likely(!(p->flags & BR_MRP_AWARE))) goto out; - if (unlikely(skb->protocol == htons(ETH_P_MRP))) - return br_mrp_rcv(p, skb, p->dev); - + return br_mrp_rcv(p, skb, p->dev); out: return 0; } diff --git a/net/bridge/br_private.h b/net/bridge/br_private.h index 345118e35c42..3e62ce2ef8a5 100644 --- a/net/bridge/br_private.h +++ b/net/bridge/br_private.h @@ -480,6 +480,8 @@ struct net_bridge { #endif struct hlist_head fdb_list; + struct hlist_head frame_type_list; + #if IS_ENABLED(CONFIG_BRIDGE_MRP) struct list_head mrp_list; #endif @@ -755,6 +757,16 @@ int nbp_backup_change(struct net_bridge_port *p, struct net_device *backup_dev); int br_handle_frame_finish(struct net *net, struct sock *sk, struct sk_buff *skb); rx_handler_func_t *br_get_rx_handler(const struct net_device *dev); +struct br_frame_type { + __be16 type; + int (*frame_handler)(struct net_bridge_port *port, + struct sk_buff *skb); + struct hlist_node list; +}; + +void br_add_frame(struct net_bridge *br, struct br_frame_type *ft); +void br_del_frame(struct net_bridge *br, struct br_frame_type *ft); + static inline bool br_rx_handler_check_rcu(const struct net_device *dev) { return rcu_dereference(dev->rx_handler) == br_get_rx_handler(dev); @@ -1417,7 +1429,6 @@ extern int (*br_fdb_test_addr_hook)(struct net_device *dev, unsigned char *addr) #if IS_ENABLED(CONFIG_BRIDGE_MRP) int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, struct nlattr *attr, int cmd, struct netlink_ext_ack *extack); -int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb); bool br_mrp_enabled(struct net_bridge *br); void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p); int br_mrp_fill_info(struct sk_buff *skb, struct net_bridge *br); @@ -1429,11 +1440,6 @@ static inline int br_mrp_parse(struct net_bridge *br, struct net_bridge_port *p, return -EOPNOTSUPP; } -static inline int br_mrp_process(struct net_bridge_port *p, struct sk_buff *skb) -{ - return 0; -} - static inline bool br_mrp_enabled(struct net_bridge *br) { return false;