From patchwork Fri Jul 13 09:40:37 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Adrien Mazarguil X-Patchwork-Id: 43006 X-Patchwork-Delegate: shahafs@mellanox.com Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id 02D465B20; Fri, 13 Jul 2018 11:40:57 +0200 (CEST) Received: from mail-wr1-f66.google.com (mail-wr1-f66.google.com [209.85.221.66]) by dpdk.org (Postfix) with ESMTP id 025654CBB for ; Fri, 13 Jul 2018 11:40:54 +0200 (CEST) Received: by mail-wr1-f66.google.com with SMTP id a3-v6so15236299wrt.2 for ; Fri, 13 Jul 2018 02:40:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=6wind-com.20150623.gappssmtp.com; s=20150623; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=GSNs1Ugw6d/O3arA49WCBly22qqU9nDSyLk2ebxzCi0=; b=M5lKb1MNGxIZFMmdNcVBo8dpk6rkzOMFFbgPL28UCk5rqOQFmKOKwfGc/zMLQ1yvF3 jEAbRfUtpFNeurlKR2O4MulQRGE1vUj+XZpw5S1eHRoJgcGA50QHgvKn4wowM5H9BDmq ti7OktuKKL6ifUC/9QTlTymUGYF6iiV0kFNJVE1Lpc4LTjJDX/ZbAh2yKduoBoPvF2Cb tbEbwbsHDT4TNZqd9w2AJRcll3AXFnHpm5z7xOrRrC3rx7QJYqTn/uT/a22yNgjcs81d hulLcjzqozix/tadnvhsqBDnsdQS5Gajlm3l6SSa0MRpjz0nv+cHvYSuKGJT/JsjJMR4 MRfg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=GSNs1Ugw6d/O3arA49WCBly22qqU9nDSyLk2ebxzCi0=; b=fEUXFmFrrvW5djnkAKX9ALFgcAaePLhPDXrkHMd2tXX3ULvKZWEhL3DQ3XG447zu9R bhIFMX15gpoZOAhfUWpHpmS5AdwoIVRf3AN1Uhz0l/YVyn18d2UeDxtlcUrH23hMWX9j hGBeMWHyk5bnDRXxa0F+nx32APjcsBx/uPm6P3sXRAD/xbpY3XQPi57RyNuUJit67Fnx 2Y2p/dCwwn7sSf1phsNGgTf2YUVafQS3JsC9n6dBZaPinZIajsSp6YLY/5gIUjTb04FH aqurBdyfZ93pUPL95BDHZ1cojfxN6+r1F5mt19qkuGJh/WRNcUlYJlZksU6CZ1QV+5Ge UsZA== X-Gm-Message-State: AOUpUlHXpSeRiblQH/z7vrQ736nzPoE8lSBi3+4Z2505iKyByOAwoQh7 OUhLUqiQGNO/anAySzx9OTxP1aoV X-Google-Smtp-Source: AAOMgpeps8gdB5KSgKXIa2WJBMGkwI0G8KJgG7wBY+abpgzWTUa9ndnQMbfFpGTNrri1gkTICCci8g== X-Received: by 2002:adf:ec04:: with SMTP id x4-v6mr4038642wrn.245.1531474854546; Fri, 13 Jul 2018 02:40:54 -0700 (PDT) Received: from 6wind.com (host.78.145.23.62.rev.coltfrance.com. [62.23.145.78]) by smtp.gmail.com with ESMTPSA id j3-v6sm8824463wrt.70.2018.07.13.02.40.53 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Fri, 13 Jul 2018 02:40:53 -0700 (PDT) Date: Fri, 13 Jul 2018 11:40:37 +0200 From: Adrien Mazarguil To: Shahaf Shuler Cc: Nelio Laranjeiro , Yongseok Koh , dev@dpdk.org Message-ID: <20180713092910.26276-2-adrien.mazarguil@6wind.com> References: <20180627173355.4718-1-adrien.mazarguil@6wind.com> <20180713092910.26276-1-adrien.mazarguil@6wind.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20180713092910.26276-1-adrien.mazarguil@6wind.com> X-Mailer: git-send-email 2.11.0 Subject: [dpdk-dev] [PATCH v2 1/6] net/mlx5: lay groundwork for switch offloads X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" With mlx5, unlike normal flow rules implemented through Verbs for traffic emitted and received by the application, those targeting different logical ports of the device (VF representors for instance) are offloaded at the switch level and must be configured through Netlink (TC interface). This patch adds preliminary support to manage such flow rules through the flow API (rte_flow). Instead of rewriting tons of Netlink helpers and as previously suggested by Stephen [1], this patch introduces a new dependency to libmnl [2] (LGPL-2.1) when compiling mlx5. [1] https://mails.dpdk.org/archives/dev/2018-March/092676.html [2] https://netfilter.org/projects/libmnl/ Signed-off-by: Adrien Mazarguil Acked-by: Nelio Laranjeiro Cc: Yongseok Koh Signed-off-by: Adrien Mazarguil > Acked-by: Nelio Laranjeiro > Acked-by: Yongseok Koh > --- v2 changes: - Added NETLINK_CAP_ACK definition if missing from the host system. This parameter is also not mandatory anymore and won't prevent creation of NL sockets when not supported. - Modified mlx5_nl_flow_nl_ack() and mlx5_nl_flow_init() to consume the least amount of stack space based on message size, instead of the fixed MNL_SOCKET_BUFFER_SIZE which is quite large. --- drivers/net/mlx5/Makefile | 2 + drivers/net/mlx5/mlx5.c | 32 ++++++++ drivers/net/mlx5/mlx5.h | 10 +++ drivers/net/mlx5/mlx5_nl_flow.c | 147 +++++++++++++++++++++++++++++++++++ mk/rte.app.mk | 2 +- 5 files changed, 192 insertions(+), 1 deletion(-) diff --git a/drivers/net/mlx5/Makefile b/drivers/net/mlx5/Makefile index 9e274964b..8d3cb219b 100644 --- a/drivers/net/mlx5/Makefile +++ b/drivers/net/mlx5/Makefile @@ -33,6 +33,7 @@ SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_mr.c SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_flow.c SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_socket.c SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_nl.c +SRCS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += mlx5_nl_flow.c ifeq ($(CONFIG_RTE_LIBRTE_MLX5_DLOPEN_DEPS),y) INSTALL-$(CONFIG_RTE_LIBRTE_MLX5_PMD)-lib += $(LIB_GLUE) @@ -56,6 +57,7 @@ LDLIBS += -ldl else LDLIBS += -libverbs -lmlx5 endif +LDLIBS += -lmnl LDLIBS += -lrte_eal -lrte_mbuf -lrte_mempool -lrte_ring LDLIBS += -lrte_ethdev -lrte_net -lrte_kvargs LDLIBS += -lrte_bus_pci diff --git a/drivers/net/mlx5/mlx5.c b/drivers/net/mlx5/mlx5.c index 6d3421fae..8fb8c91eb 100644 --- a/drivers/net/mlx5/mlx5.c +++ b/drivers/net/mlx5/mlx5.c @@ -282,6 +282,8 @@ mlx5_dev_close(struct rte_eth_dev *dev) close(priv->nl_socket_route); if (priv->nl_socket_rdma >= 0) close(priv->nl_socket_rdma); + if (priv->mnl_socket) + mlx5_nl_flow_socket_destroy(priv->mnl_socket); ret = mlx5_hrxq_ibv_verify(dev); if (ret) DRV_LOG(WARNING, "port %u some hash Rx queue still remain", @@ -1116,6 +1118,34 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev, claim_zero(mlx5_mac_addr_add(eth_dev, &mac, 0, 0)); if (vf && config.vf_nl_en) mlx5_nl_mac_addr_sync(eth_dev); + priv->mnl_socket = mlx5_nl_flow_socket_create(); + if (!priv->mnl_socket) { + err = -rte_errno; + DRV_LOG(WARNING, + "flow rules relying on switch offloads will not be" + " supported: cannot open libmnl socket: %s", + strerror(rte_errno)); + } else { + struct rte_flow_error error; + unsigned int ifindex = mlx5_ifindex(eth_dev); + + if (!ifindex) { + err = -rte_errno; + error.message = + "cannot retrieve network interface index"; + } else { + err = mlx5_nl_flow_init(priv->mnl_socket, ifindex, + &error); + } + if (err) { + DRV_LOG(WARNING, + "flow rules relying on switch offloads will" + " not be supported: %s: %s", + error.message, strerror(rte_errno)); + mlx5_nl_flow_socket_destroy(priv->mnl_socket); + priv->mnl_socket = NULL; + } + } TAILQ_INIT(&priv->flows); TAILQ_INIT(&priv->ctrl_flows); /* Hint libmlx5 to use PMD allocator for data plane resources */ @@ -1168,6 +1198,8 @@ mlx5_dev_spawn(struct rte_device *dpdk_dev, close(priv->nl_socket_route); if (priv->nl_socket_rdma >= 0) close(priv->nl_socket_rdma); + if (priv->mnl_socket) + mlx5_nl_flow_socket_destroy(priv->mnl_socket); if (own_domain_id) claim_zero(rte_eth_switch_domain_free(priv->domain_id)); rte_free(priv); diff --git a/drivers/net/mlx5/mlx5.h b/drivers/net/mlx5/mlx5.h index 131be334c..98b6ec07d 100644 --- a/drivers/net/mlx5/mlx5.h +++ b/drivers/net/mlx5/mlx5.h @@ -156,6 +156,8 @@ struct mlx5_drop { struct mlx5_rxq_ibv *rxq; /* Verbs Rx queue. */ }; +struct mnl_socket; + struct priv { LIST_ENTRY(priv) mem_event_cb; /* Called by memory event callback. */ struct rte_eth_dev_data *dev_data; /* Pointer to device data. */ @@ -215,6 +217,7 @@ struct priv { int nl_socket_rdma; /* Netlink socket (NETLINK_RDMA). */ int nl_socket_route; /* Netlink socket (NETLINK_ROUTE). */ uint32_t nl_sn; /* Netlink message sequence number. */ + struct mnl_socket *mnl_socket; /* Libmnl socket. */ }; #define PORT_ID(priv) ((priv)->dev_data->port_id) @@ -380,4 +383,11 @@ unsigned int mlx5_nl_ifindex(int nl, const char *name); int mlx5_nl_switch_info(int nl, unsigned int ifindex, struct mlx5_switch_info *info); +/* mlx5_nl_flow.c */ + +int mlx5_nl_flow_init(struct mnl_socket *nl, unsigned int ifindex, + struct rte_flow_error *error); +struct mnl_socket *mlx5_nl_flow_socket_create(void); +void mlx5_nl_flow_socket_destroy(struct mnl_socket *nl); + #endif /* RTE_PMD_MLX5_H_ */ diff --git a/drivers/net/mlx5/mlx5_nl_flow.c b/drivers/net/mlx5/mlx5_nl_flow.c new file mode 100644 index 000000000..60a4493e5 --- /dev/null +++ b/drivers/net/mlx5/mlx5_nl_flow.c @@ -0,0 +1,147 @@ +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright 2018 6WIND S.A. + * Copyright 2018 Mellanox Technologies, Ltd + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "mlx5.h" + +/* Normally found in linux/netlink.h. */ +#ifndef NETLINK_CAP_ACK +#define NETLINK_CAP_ACK 10 +#endif + +/** + * Send Netlink message with acknowledgment. + * + * @param nl + * Libmnl socket to use. + * @param nlh + * Message to send. This function always raises the NLM_F_ACK flag before + * sending. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +static int +mlx5_nl_flow_nl_ack(struct mnl_socket *nl, struct nlmsghdr *nlh) +{ + alignas(struct nlmsghdr) + uint8_t ans[mnl_nlmsg_size(sizeof(struct nlmsgerr)) + + nlh->nlmsg_len - sizeof(*nlh)]; + uint32_t seq = random(); + int ret; + + nlh->nlmsg_flags |= NLM_F_ACK; + nlh->nlmsg_seq = seq; + ret = mnl_socket_sendto(nl, nlh, nlh->nlmsg_len); + if (ret != -1) + ret = mnl_socket_recvfrom(nl, ans, sizeof(ans)); + if (ret != -1) + ret = mnl_cb_run + (ans, ret, seq, mnl_socket_get_portid(nl), NULL, NULL); + if (!ret) + return 0; + rte_errno = errno; + return -rte_errno; +} + +/** + * Initialize ingress qdisc of a given network interface. + * + * @param nl + * Libmnl socket of the @p NETLINK_ROUTE kind. + * @param ifindex + * Index of network interface to initialize. + * @param[out] error + * Perform verbose error reporting if not NULL. + * + * @return + * 0 on success, a negative errno value otherwise and rte_errno is set. + */ +int +mlx5_nl_flow_init(struct mnl_socket *nl, unsigned int ifindex, + struct rte_flow_error *error) +{ + struct nlmsghdr *nlh; + struct tcmsg *tcm; + alignas(struct nlmsghdr) + uint8_t buf[mnl_nlmsg_size(sizeof(*tcm) + 128)]; + + /* Destroy existing ingress qdisc and everything attached to it. */ + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = RTM_DELQDISC; + nlh->nlmsg_flags = NLM_F_REQUEST; + tcm = mnl_nlmsg_put_extra_header(nlh, sizeof(*tcm)); + tcm->tcm_family = AF_UNSPEC; + tcm->tcm_ifindex = ifindex; + tcm->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0); + tcm->tcm_parent = TC_H_INGRESS; + /* Ignore errors when qdisc is already absent. */ + if (mlx5_nl_flow_nl_ack(nl, nlh) && + rte_errno != EINVAL && rte_errno != ENOENT) + return rte_flow_error_set + (error, rte_errno, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, "netlink: failed to remove ingress qdisc"); + /* Create fresh ingress qdisc. */ + nlh = mnl_nlmsg_put_header(buf); + nlh->nlmsg_type = RTM_NEWQDISC; + nlh->nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL; + tcm = mnl_nlmsg_put_extra_header(nlh, sizeof(*tcm)); + tcm->tcm_family = AF_UNSPEC; + tcm->tcm_ifindex = ifindex; + tcm->tcm_handle = TC_H_MAKE(TC_H_INGRESS, 0); + tcm->tcm_parent = TC_H_INGRESS; + mnl_attr_put_strz_check(nlh, sizeof(buf), TCA_KIND, "ingress"); + if (mlx5_nl_flow_nl_ack(nl, nlh)) + return rte_flow_error_set + (error, rte_errno, RTE_FLOW_ERROR_TYPE_UNSPECIFIED, + NULL, "netlink: failed to create ingress qdisc"); + return 0; +} + +/** + * Create and configure a libmnl socket for Netlink flow rules. + * + * @return + * A valid libmnl socket object pointer on success, NULL otherwise and + * rte_errno is set. + */ +struct mnl_socket * +mlx5_nl_flow_socket_create(void) +{ + struct mnl_socket *nl = mnl_socket_open(NETLINK_ROUTE); + + if (nl) { + mnl_socket_setsockopt(nl, NETLINK_CAP_ACK, &(int){ 1 }, + sizeof(int)); + if (!mnl_socket_bind(nl, 0, MNL_SOCKET_AUTOPID)) + return nl; + } + rte_errno = errno; + if (nl) + mnl_socket_close(nl); + return NULL; +} + +/** + * Destroy a libmnl socket. + */ +void +mlx5_nl_flow_socket_destroy(struct mnl_socket *nl) +{ + mnl_socket_close(nl); +} diff --git a/mk/rte.app.mk b/mk/rte.app.mk index 7bcf6308d..414f1b967 100644 --- a/mk/rte.app.mk +++ b/mk/rte.app.mk @@ -145,7 +145,7 @@ endif ifeq ($(CONFIG_RTE_LIBRTE_MLX5_DLOPEN_DEPS),y) _LDLIBS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += -lrte_pmd_mlx5 -ldl else -_LDLIBS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += -lrte_pmd_mlx5 -libverbs -lmlx5 +_LDLIBS-$(CONFIG_RTE_LIBRTE_MLX5_PMD) += -lrte_pmd_mlx5 -libverbs -lmlx5 -lmnl endif _LDLIBS-$(CONFIG_RTE_LIBRTE_MVPP2_PMD) += -lrte_pmd_mvpp2 -L$(LIBMUSDK_PATH)/lib -lmusdk _LDLIBS-$(CONFIG_RTE_LIBRTE_NFP_PMD) += -lrte_pmd_nfp