Received: by 2002:a25:1985:0:0:0:0:0 with SMTP id 127csp3939613ybz; Mon, 20 Apr 2020 12:16:29 -0700 (PDT) X-Google-Smtp-Source: APiQypKoEM9bUwH0n11oqVnnvj2hLh0rY/TUVpAjfVP6ObIliNLaQTpWyUW9y54dLPY2bB4BnjG8 X-Received: by 2002:a50:8e4b:: with SMTP id 11mr15392778edx.329.1587410189216; Mon, 20 Apr 2020 12:16:29 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1587410189; cv=none; d=google.com; s=arc-20160816; b=C8Ek3fHuCrFOE0krYDvjKmuDtm4HeWxbOG20/P57DK8jw/IqeuVeTAJJpxLDGx7sVT 0/SGks8P9MGEOFif9ebRr3WWLAEZYQMc07pqyU9seQzSYbmdi6WNQLt/UJU5ETv8nAj3 4nw+I51tl4Tvqdn9MV7uEsprvlNGTSRE3DQw8shWXZyrjNRfzVy3YXHD+ZskpmD4BvG2 48lnW15lJbn/raDuz2tbBAg0zy66g9pGp+wIGaD+B4mVTE4axPdp5tlMzZe/EiEXSmNw 7Q+/DfJFYcUt12IC+m4t42s6RyiTNEHqHYZUMIBDUCiV1X6p1h50GWAOGakL05TgZvCS DzrA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:user-agent:in-reply-to :content-disposition:mime-version:references:message-id:subject:cc :to:from:date:ironport-sdr:dkim-signature; bh=EZwNjVsPWdd3ORLi+jrk6MTcnU+OjMzvq1yz55Nt11g=; b=HqLfFMFTj1DAAo6Ic7d5qlC3m5vwzOVukDEdN9ZALtijPuvVF8YIy8zOjFSZlVOcG7 S4t8O7VlhVaFwmlwohzwxq3GxGNZ6G3dBlH8sABt2+0kbozMc83TE+ih818wmQCAhWcR kRe17TyF+TcrdoMrAhjPrjl3U/A3RnYILKP/Sog9nnkd1lfgVr3X0JtI6rBiDzIk1D1E H/vZFUTaIHZcbVWmdVTvsaQ1cs+WASHs46hIJBiQyCnF6bQ94kTWimgNCYGLZcbZKi7r GcQnZ9qz20EILX43cK9Gp+TK5ctTIvScWuTAftzRhmCOH2Ldk9LSFB8xVXqJfd33Aih/ 3K6Q== ARC-Authentication-Results: i=1; mx.google.com; dkim=fail header.i=@microchip.com header.s=mchp header.b=1MVPjqYq; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=microchip.com Return-Path: Received: from vger.kernel.org (vger.kernel.org. [23.128.96.18]) by mx.google.com with ESMTP id u13si204930eds.336.2020.04.20.12.16.06; Mon, 20 Apr 2020 12:16:29 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18; Authentication-Results: mx.google.com; dkim=fail header.i=@microchip.com header.s=mchp header.b=1MVPjqYq; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=microchip.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726947AbgDTTNK (ORCPT + 99 others); Mon, 20 Apr 2020 15:13:10 -0400 Received: from esa3.microchip.iphmx.com ([68.232.153.233]:28227 "EHLO esa3.microchip.iphmx.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725896AbgDTTNJ (ORCPT ); Mon, 20 Apr 2020 15:13:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=microchip.com; i=@microchip.com; q=dns/txt; s=mchp; t=1587409989; x=1618945989; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=2vnmdheJzpLpxGtKAr73ObTcTXk/QGGgOTifbOJ3wh0=; b=1MVPjqYqsadEB1JBNZzcA5tvEYUyOcgJBinaEI6Q9khDHAIKAPM3z9Ww xm8ooumibjvEiKc4IWnyFH2/2uhX+mdM2J6K1cGlG5J+DDCCbW6gqVLWI P7Ty3ZYMw0ox57Rkre+3PrmiRYdZb5PDdJqvmdQ/YZP3jVCBkcR8Ux5YM ax4shswyi0FEWAyvX0ALlG6CXf+M74HR5xn0tLFMaEDEld/A+7EaJG96/ g2fR6lM/BdPda778z+IHxWIjgYY2Qju6+gMDGlMehVGL1Jgkg2Y9wfgir 9EJdBzrfIa5wCGEtAfpDiZgRCjX9k02tBrr2AqsJcxX0nqmraLYtycP09 Q==; IronPort-SDR: 7+O3WQUhUQLOumcWcVHgaFjPBIVmmz4Jffkv9GbALGCFkjEK7q1Eub2n+B7PUC4qVxWOch7GcC aPpL6gcWmsY+IiUQ3TTHG8+8/yIiZrFqV6or0kpT3mKVCM0TmUoPNDeXl33cirHaoWbUB5ZgvR VOQEXOqaadiywlWdT7ikIIxTGweSIEmf+XvFVkioluYP4fm7SZ2uweMUR8BF132/YqJP7YnBfj sb6xvopnWeD3C5RWIF6uNpSRUrFxWWyaaWXS69XDJN04407sa5Y/bp2tKbJ9eu+PcJVd4wwVbM 9IA= X-IronPort-AV: E=Sophos;i="5.72,407,1580799600"; d="scan'208";a="73936983" Received: from smtpout.microchip.com (HELO email.microchip.com) ([198.175.253.82]) by esa3.microchip.iphmx.com with ESMTP/TLS/AES256-SHA256; 20 Apr 2020 12:13:08 -0700 Received: from chn-vm-ex04.mchp-main.com (10.10.85.152) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1713.5; Mon, 20 Apr 2020 12:13:08 -0700 Received: from localhost (10.10.115.15) by chn-vm-ex04.mchp-main.com (10.10.85.152) with Microsoft SMTP Server id 15.1.1713.5 via Frontend Transport; Mon, 20 Apr 2020 12:13:08 -0700 Date: Mon, 20 Apr 2020 21:13:07 +0200 From: Horatiu Vultur To: Nikolay Aleksandrov CC: , , , , , , , , , , Subject: Re: [PATCH net-next 09/13] bridge: mrp: Connect MRP API with the switchev API Message-ID: <20200420191307.6ad5trdtzx4q2rv5@soft-dev3.microsemi.net> References: <20200420150947.30974-1-horatiu.vultur@microchip.com> <20200420150947.30974-10-horatiu.vultur@microchip.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Disposition: inline In-Reply-To: User-Agent: NeoMutt/20180716 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The 04/20/2020 20:17, Nikolay Aleksandrov wrote: > EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe > > On 20/04/2020 18:09, Horatiu Vultur wrote: > > Implement the MRP API. > > > > In case the HW can't generate MRP Test frames then the SW will try to generate > > the frames. In case that also the SW will fail in generating the frames then a > > error is return to the userspace. The userspace is responsible to generate all > > the other MRP frames regardless if the test frames are generated by HW or SW. > > > > The forwarding/termination of MRP frames is happening in the kernel and is done > > by the MRP instance. The userspace application doesn't do the forwarding. > > > > Signed-off-by: Horatiu Vultur > > --- > > net/bridge/br_mrp.c | 551 ++++++++++++++++++++++++++++++++++++++++++++ > > 1 file changed, 551 insertions(+) > > create mode 100644 net/bridge/br_mrp.c > > > > diff --git a/net/bridge/br_mrp.c b/net/bridge/br_mrp.c > > new file mode 100644 > > index 000000000000..a52f02f174c3 > > --- /dev/null > > +++ b/net/bridge/br_mrp.c > > @@ -0,0 +1,551 @@ > > +// SPDX-License-Identifier: GPL-2.0-or-later > > + > > +#include > > +#include "br_private_mrp.h" > > + > > +static const u8 mrp_test_dmac[ETH_ALEN] = { 0x1, 0x15, 0x4e, 0x0, 0x0, 0x1 }; > > + > > +static struct net_bridge_port *br_mrp_get_port(struct net_bridge *br, > > + u32 ifindex) > > +{ > > + struct net_bridge_port *res = NULL; > > + struct net_bridge_port *port; > > + > > + list_for_each_entry(port, &br->port_list, list) { > > + if (port->dev->ifindex == ifindex) { > > + res = port; > > + break; > > + } > > + } > > + > > + return res; > > +} > > + > > +static struct br_mrp *br_mrp_find_id(struct net_bridge *br, u32 ring_id) > > +{ > > + struct br_mrp *res = NULL; > > + struct br_mrp *mrp; > > + > > + list_for_each_entry_rcu(mrp, &br->mrp_list, list, > > + lockdep_rtnl_is_held()) { > > + if (mrp->ring_id == ring_id) { > > + res = mrp; > > + break; > > + } > > + } > > + > > + return res; > > +} > > + > > +static struct br_mrp *br_mrp_find_port(struct net_bridge *br, > > + struct net_bridge_port *p) > > +{ > > + struct br_mrp *res = NULL; > > + struct br_mrp *mrp; > > + > > + list_for_each_entry_rcu(mrp, &br->mrp_list, list, > > + lockdep_rtnl_is_held()) { > > + if (rcu_access_pointer(mrp->p_port) == p || > > + rcu_access_pointer(mrp->s_port) == p) { > > + res = mrp; > > + break; > > + } > > + } > > + > > + return res; > > +} > > + > > +static int br_mrp_next_seq(struct br_mrp *mrp) > > +{ > > + mrp->seq_id++; > > + return mrp->seq_id; > > +} > > + > > +static struct sk_buff *br_mrp_skb_alloc(struct net_bridge_port *p, > > + const u8 *src, const u8 *dst) > > +{ > > + struct ethhdr *eth_hdr; > > + struct sk_buff *skb; > > + u16 *version; > > + > > + skb = dev_alloc_skb(MRP_MAX_FRAME_LENGTH); > > + if (!skb) > > + return NULL; > > + > > + skb->dev = p->dev; > > + skb->protocol = htons(ETH_P_MRP); > > + skb->priority = MRP_FRAME_PRIO; > > + skb_reserve(skb, sizeof(*eth_hdr)); > > + > > + eth_hdr = skb_push(skb, sizeof(*eth_hdr)); > > + ether_addr_copy(eth_hdr->h_dest, dst); > > + ether_addr_copy(eth_hdr->h_source, src); > > + eth_hdr->h_proto = htons(ETH_P_MRP); > > + > > + version = skb_put(skb, sizeof(*version)); > > + *version = cpu_to_be16(MRP_VERSION); > > + > > + return skb; > > +} > > + > > +static void br_mrp_skb_tlv(struct sk_buff *skb, > > + enum br_mrp_tlv_header_type type, > > + u8 length) > > +{ > > + struct br_mrp_tlv_hdr *hdr; > > + > > + hdr = skb_put(skb, sizeof(*hdr)); > > + hdr->type = type; > > + hdr->length = length; > > +} > > + > > +static void br_mrp_skb_common(struct sk_buff *skb, struct br_mrp *mrp) > > +{ > > + struct br_mrp_common_hdr *hdr; > > + > > + br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_COMMON, sizeof(*hdr)); > > + > > + hdr = skb_put(skb, sizeof(*hdr)); > > + hdr->seq_id = cpu_to_be16(br_mrp_next_seq(mrp)); > > + memset(hdr->domain, 0xff, MRP_DOMAIN_UUID_LENGTH); > > +} > > + > > +static struct sk_buff *br_mrp_alloc_test_skb(struct br_mrp *mrp, > > + struct net_bridge_port *p, > > + enum br_mrp_port_role_type port_role) > > +{ > > + struct br_mrp_ring_test_hdr *hdr = NULL; > > + struct net_bridge *br = p->br; > > + struct sk_buff *skb = NULL; > > + > > + if (!p) > > + return NULL; > > + > > + br = p->br; > > + > > + skb = br_mrp_skb_alloc(p, p->dev->dev_addr, mrp_test_dmac); > > + if (!skb) > > + return NULL; > > + > > + br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_RING_TEST, sizeof(*hdr)); > > + hdr = skb_put(skb, sizeof(*hdr)); > > + > > + hdr->prio = cpu_to_be16(MRP_DEFAULT_PRIO); > > + ether_addr_copy(hdr->sa, p->br->dev->dev_addr); > > + hdr->port_role = cpu_to_be16(port_role); > > + hdr->state = cpu_to_be16(mrp->ring_state); > > + hdr->transitions = cpu_to_be16(mrp->ring_transitions); > > + hdr->timestamp = cpu_to_be32(jiffies_to_msecs(jiffies)); > > + > > + br_mrp_skb_common(skb, mrp); > > + br_mrp_skb_tlv(skb, BR_MRP_TLV_HEADER_END, 0x0); > > + > > + return skb; > > +} > > + > > +static void br_mrp_test_work_expired(struct work_struct *work) > > +{ > > + struct delayed_work *del_work = to_delayed_work(work); > > + struct br_mrp *mrp = container_of(del_work, struct br_mrp, test_work); > > + struct net_bridge_port *p; > > + bool notify_open = false; > > + struct sk_buff *skb; > > + > > + if (time_before_eq(mrp->test_end, jiffies)) > > + return; > > + > > + if (mrp->test_count_miss < mrp->test_max_miss) { > > + mrp->test_count_miss++; > > + } else { > > + /* Notify that the ring is open only if the ring state is > > + * closed, otherwise it would continue to notify at every > > + * interval. > > + */ > > + if (mrp->ring_state == BR_MRP_RING_STATE_CLOSED) > > + notify_open = true; > > + } > > + > > + rcu_read_lock(); > > + > > + p = rcu_dereference(mrp->p_port); > > + if (p) { > > + skb = br_mrp_alloc_test_skb(mrp, p, BR_MRP_PORT_ROLE_PRIMARY); > > + if (!skb) > > + goto out; > > + > > + skb_reset_network_header(skb); > > + dev_queue_xmit(skb); > > + > > + if (notify_open && !mrp->ring_role_offloaded) > > + br_mrp_port_open(p->dev, true); > > + } > > + > > + p = rcu_dereference(mrp->s_port); > > + if (p) { > > + skb = br_mrp_alloc_test_skb(mrp, p, BR_MRP_PORT_ROLE_SECONDARY); > > + if (!skb) > > + goto out; > > + > > + skb_reset_network_header(skb); > > + dev_queue_xmit(skb); > > + > > + if (notify_open && !mrp->ring_role_offloaded) > > + br_mrp_port_open(p->dev, true); > > + } > > + > > +out: > > + rcu_read_unlock(); > > + > > + queue_delayed_work(system_wq, &mrp->test_work, > > + usecs_to_jiffies(mrp->test_interval)); > > +} > > + > > +/* Deletes the MRP instance. > > + * note: called under rtnl_lock > > + */ > > +static void br_mrp_del_impl(struct net_bridge *br, struct br_mrp *mrp) > > +{ > > + struct net_bridge_port *p; > > + > > + /* Stop sending MRP_Test frames */ > > + cancel_delayed_work_sync(&mrp->test_work); > > + br_mrp_switchdev_send_ring_test(br, mrp, 0, 0, 0); > > + > > + br_mrp_switchdev_del(br, mrp); > > + > > + /* Reset the ports */ > > + p = rtnl_dereference(mrp->p_port); > > + if (p) { > > + spin_lock_bh(&br->lock); > > + p->state = BR_STATE_FORWARDING; > > + p->flags &= ~BR_MRP_AWARE; > > + spin_unlock_bh(&br->lock); > > + br_mrp_port_switchdev_set_state(p, BR_STATE_FORWARDING); > > + rcu_assign_pointer(mrp->p_port, NULL); > > + } > > + > > + p = rtnl_dereference(mrp->s_port); > > + if (p) { > > + spin_lock_bh(&br->lock); > > + p->state = BR_STATE_FORWARDING; > > + p->flags &= ~BR_MRP_AWARE; > > + spin_unlock_bh(&br->lock); > > + br_mrp_port_switchdev_set_state(p, BR_STATE_FORWARDING); > > + rcu_assign_pointer(mrp->s_port, NULL); > > + } > > + > > + list_del_rcu(&mrp->list); > > + kfree_rcu(mrp, rcu); > > +} > > + > > +/* Adds a new MRP instance. > > + * note: called under rtnl_lock > > + */ > > +int br_mrp_add(struct net_bridge *br, struct br_mrp_instance *instance) > > +{ > > + struct net_bridge_port *p; > > + struct br_mrp *mrp; > > + int err; > > + > > + /* If the ring exists, it is not possible to create another one with the > > + * same ring_id > > + */ > > + mrp = br_mrp_find_id(br, instance->ring_id); > > + if (mrp) > > + return -EINVAL; > > + > > + if (!br_mrp_get_port(br, instance->p_ifindex) || > > + !br_mrp_get_port(br, instance->s_ifindex)) > > + return -EINVAL; > > + > > + mrp = kzalloc(sizeof(*mrp), GFP_KERNEL); > > + if (!mrp) > > + return -ENOMEM; > > + > > + mrp->ring_id = instance->ring_id; > > + > > + p = br_mrp_get_port(br, instance->p_ifindex); > > + spin_lock_bh(&br->lock); > > + p->state = BR_STATE_FORWARDING; > > + p->flags |= BR_MRP_AWARE; > > + spin_unlock_bh(&br->lock); > > + rcu_assign_pointer(mrp->p_port, p); > > + > > + p = br_mrp_get_port(br, instance->s_ifindex); > > + spin_lock_bh(&br->lock); > > + p->state = BR_STATE_FORWARDING; > > + p->flags |= BR_MRP_AWARE; > > + spin_unlock_bh(&br->lock); > > + rcu_assign_pointer(mrp->s_port, p); > > + > > + INIT_DELAYED_WORK(&mrp->test_work, br_mrp_test_work_expired); > > + list_add_tail_rcu(&mrp->list, &br->mrp_list); > > + > > + err = br_mrp_switchdev_add(br, mrp); > > + if (err) > > + goto delete_mrp; > > + > > + return 0; > > + > > +delete_mrp: > > + br_mrp_del_impl(br, mrp); > > + > > + return err; > > +} > > + > > +/* Deletes the MRP instance from which the port is part of > > + * note: called under rtnl_lock > > + */ > > +void br_mrp_port_del(struct net_bridge *br, struct net_bridge_port *p) > > +{ > > + struct br_mrp *mrp = br_mrp_find_port(br, p); > > + > > + /* If the port is not part of a MRP instance just bail out */ > > + if (!mrp) > > + return; > > + > > + br_mrp_del_impl(br, mrp); > > +} > > + > > +/* Deletes existing MRP instance based on ring_id > > + * note: called under rtnl_lock > > + */ > > +int br_mrp_del(struct net_bridge *br, struct br_mrp_instance *instance) > > +{ > > + struct br_mrp *mrp = br_mrp_find_id(br, instance->ring_id); > > + > > + if (!mrp) > > + return -EINVAL; > > + > > + br_mrp_del_impl(br, mrp); > > + > > + return 0; > > +} > > + > > +/* Set port state, port state can be forwarding, blocked or disabled > > + * note: already called with rcu_read_lock > > + */ > > +int br_mrp_set_port_state(struct net_bridge_port *p, > > + enum br_mrp_port_state_type state) > > +{ > > + spin_lock_bh(&p->br->lock); > > + > > + if (state == BR_MRP_PORT_STATE_FORWARDING) > > + p->state = BR_STATE_FORWARDING; > > + else > > + p->state = BR_STATE_BLOCKING; > > + > > + spin_unlock_bh(&p->br->lock); > > + > > + br_mrp_port_switchdev_set_state(p, state); > > + > > + return 0; > > +} > > + > > +/* Set port role, port role can be primary or secondary > > + * note: already called with rcu_read_lock > > + */ > > +int br_mrp_set_port_role(struct net_bridge_port *p, > > + struct br_mrp_port_role *role) > > +{ > > + struct br_mrp *mrp = br_mrp_find_id(p->br, role->ring_id); > > + > > + if (!mrp) > > + return -EINVAL; > > + > > + if (role->role == BR_MRP_PORT_ROLE_PRIMARY) > > + rcu_assign_pointer(mrp->p_port, p); > > + else > > + rcu_assign_pointer(mrp->s_port, p); > > + > > + br_mrp_port_switchdev_set_role(p, role->role); > > + > > + return 0; > > +} > > + > > +/* Set ring state, ring state can be only Open or Closed > > + * note: already called with rcu_read_lock > > + */ > > +int br_mrp_set_ring_state(struct net_bridge *br, > > + struct br_mrp_ring_state *state) > > +{ > > + struct br_mrp *mrp = br_mrp_find_id(br, state->ring_id); > > + > > + if (!mrp) > > + return -EINVAL; > > + > > + if (mrp->ring_state == BR_MRP_RING_STATE_CLOSED && > > + state->ring_state != BR_MRP_RING_STATE_CLOSED) > > + mrp->ring_transitions++; > > + > > + mrp->ring_state = state->ring_state; > > + > > + br_mrp_switchdev_set_ring_state(br, mrp, state->ring_state); > > + > > + return 0; > > +} > > + > > +/* Set ring role, ring role can be only MRM(Media Redundancy Manager) or > > + * MRC(Media Redundancy Client). > > + * note: already called with rcu_read_lock > > + */ > > +int br_mrp_set_ring_role(struct net_bridge *br, > > + struct br_mrp_ring_role *role) > > +{ > > + struct br_mrp *mrp = br_mrp_find_id(br, role->ring_id); > > + int err; > > + > > + if (!mrp) > > + return -EINVAL; > > + > > + mrp->ring_role = role->ring_role; > > + > > + /* If there is an error just bailed out */ > > + err = br_mrp_switchdev_set_ring_role(br, mrp, role->ring_role); > > + if (err && err != -EOPNOTSUPP) > > + return err; > > + > > + /* Now detect if the HW actually applied the role or not. If the HW > > + * applied the role it means that the SW will not to do those operations > > + * anymore. For example if the role ir MRM then the HW will notify the > > + * SW when ring is open, but if the is not pushed to the HW the SW will > > + * need to detect when the ring is open > > + */ > > + mrp->ring_role_offloaded = err == -EOPNOTSUPP ? 0 : 1; > > + > > + return 0; > > +} > > + > > +/* Start to generate MRP test frames, the frames are generated by HW and if it > > + * fails, they are generated by the SW. > > + * note: already called with rcu_read_lock > > + */ > > +int br_mrp_start_test(struct net_bridge *br, > > + struct br_mrp_start_test *test) > > +{ > > + struct br_mrp *mrp = br_mrp_find_id(br, test->ring_id); > > + > > + if (!mrp) > > + return -EINVAL; > > + > > + /* Try to push is to the HW and if it fails then continue to generate in > > + * SW and if that also fails then return error > > + */ > > + if (!br_mrp_switchdev_send_ring_test(br, mrp, test->interval, > > + test->max_miss, test->period)) > > + return 0; > > + > > + mrp->test_interval = test->interval; > > + mrp->test_end = jiffies + usecs_to_jiffies(test->period); > > + mrp->test_max_miss = test->max_miss; > > + mrp->test_count_miss = 0; > > + queue_delayed_work(system_wq, &mrp->test_work, > > + usecs_to_jiffies(test->interval)); > > + > > + return 0; > > +} > > + > > +/* Process only MRP Test frame. All the other MRP frames are processed by > > + * userspace application > > + * note: already called with rcu_read_lock > > + */ > > +static void br_mrp_mrm_process(struct br_mrp *mrp, struct net_bridge_port *port, > > + struct sk_buff *skb) > > +{ > > + struct br_mrp_tlv_hdr *hdr; > > + > > + hdr = (struct br_mrp_tlv_hdr *)(skb->data + sizeof(uint16_t)); > > + > > + if (!hdr) > > + return; > > + > > + if (hdr->type != BR_MRP_TLV_HEADER_RING_TEST) > > + return; > > + > > + mrp->test_count_miss = 0; > > + > > + /* Notify the userspace that the ring is closed only when the ring is > > + * not closed > > + */ > > + if (mrp->ring_state != BR_MRP_RING_STATE_CLOSED) > > + br_mrp_port_open(port->dev, false); > > This function is defined in the next patch. The only reason this compiles is because > you update the Makefile in patch 11 which hides such errors. Please update the Makefile > in the respective patches where these new files are added so they can be compiled, and > such things can be caught automatically. Yes, I will update this in next patch series. > > > +} > > + > > +/* This will just forward the frame to the other mrp ring port(MRC role) or will > > + * not do anything. > > + * note: already called with rcu_read_lock > > + */ > > +static int br_mrp_rcv(struct net_bridge_port *p, > > + struct sk_buff *skb, struct net_device *dev) > > +{ > > + struct net_device *s_dev, *p_dev, *d_dev; > > + struct net_bridge_port *p_port, *s_port; > > + struct net_bridge *br; > > + struct sk_buff *nskb; > > + struct br_mrp *mrp; > > + > > + /* If port is disabled don't accept any frames */ > > + if (p->state == BR_STATE_DISABLED) > > + return 0; > > + > > + br = p->br; > > + mrp = br_mrp_find_port(br, p); > > + if (unlikely(!mrp)) > > + return 0; > > + > > + p_port = rcu_dereference(mrp->p_port); > > + if (!p_port) > > + return 0; > > + > > + s_port = rcu_dereference(mrp->s_port); > > + if (!s_port) > > + return 0; > > + > > + /* If the role is MRM then don't forward the frames */ > > + if (mrp->ring_role == BR_MRP_RING_ROLE_MRM) { > > + br_mrp_mrm_process(mrp, p, skb); > > + return 1; > > + } > > + > > + /* Clone the frame and forward it on the other MRP port */ > > + nskb = skb_clone(skb, GFP_ATOMIC); > > + if (!nskb) > > + return 0; > > + > > + p_dev = p_port->dev; > > + s_dev = s_port->dev; > > + > > + if (p_dev == dev) > > + d_dev = s_dev; > > + else > > + d_dev = p_dev; > > + > > + nskb->dev = d_dev; > > + skb_push(nskb, ETH_HLEN); > > + dev_queue_xmit(nskb); > > + > > + return 1; > > +} > > + > > +/* Check if the frame was received on a port that is part of MRP ring > > + * and if the frame has MRP eth. In that case process the frame otherwise do > > + * normal forwarding. > > + * note: already called with rcu_read_lock > > + */ > > +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); > > + > > +out: > > + return 0; > > +} > > + > > +bool br_mrp_enabled(struct net_bridge *br) > > +{ > > + return !list_empty(&br->mrp_list); > > +} > > > -- /Horatiu