From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C4C6C433FF for ; Tue, 13 Aug 2019 07:55:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 3ECCB20665 for ; Tue, 13 Aug 2019 07:55:58 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="mdw2rZiV" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728002AbfHMHz5 (ORCPT ); Tue, 13 Aug 2019 03:55:57 -0400 Received: from new2-smtp.messagingengine.com ([66.111.4.224]:58221 "EHLO new2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725981AbfHMHz4 (ORCPT ); Tue, 13 Aug 2019 03:55:56 -0400 Received: from compute3.internal (compute3.nyi.internal [10.202.2.43]) by mailnew.nyi.internal (Postfix) with ESMTP id B68F4310A; Tue, 13 Aug 2019 03:55:55 -0400 (EDT) Received: from mailfrontend1 ([10.202.2.162]) by compute3.internal (MEProxy); Tue, 13 Aug 2019 03:55:55 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm3; bh=jWHT+X7OcdTMjivyhzA+5BR+l2Z6/szjRWb3h+88Yf0=; b=mdw2rZiV GYOa0ePLdcdCqu1H6bp+sqMcXDGqoElIV2qm3FPp+fyJynniFjWbcbjQaLa+GYoK r7gD3uiK8BpvKdZJyPaz5g5WyobKuXWlyNOHsDC/OAJ0npvcYjUudlWiQsTXT+yb Yjh3FeWGARyRo/95f2YQFzNr3pa6wA+zjcJ5lD6KTfKLfqCObiCG0klJAxcRcXEc +BUYGoj44Qjd+NYHAv5rMIDx0DRpg5UWFtKuwKgRRP6VWmwr2iUYAt8Gtsx+JGzg URun7sqzlowi8Wdu2CgV24lJS280eCvxUA+YvTvav7Yd76Xh29cTpaIqNa5ZN3rH Q293RG/oZbhTPA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgeduvddruddvhedguddvhecutefuodetggdotefrod ftvfcurfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfgh necuuegrihhlohhuthemuceftddtnecunecujfgurhephffvufffkffojghfggfgsedtke ertdertddtnecuhfhrohhmpefkughoucfutghhihhmmhgvlhcuoehiughoshgthhesihgu ohhstghhrdhorhhgqeenucffohhmrghinhepfhgvughorhgrhhhoshhtvggurdhorhhgne cukfhppeduleefrdegjedrudeihedrvdehudenucfrrghrrghmpehmrghilhhfrhhomhep ihguohhstghhsehiughoshgthhdrohhrghenucevlhhushhtvghrufhiiigvpedt X-ME-Proxy: Received: from splinter.mtl.com (unknown [193.47.165.251]) by mail.messagingengine.com (Postfix) with ESMTPA id 7E0878005B; Tue, 13 Aug 2019 03:55:51 -0400 (EDT) From: Ido Schimmel To: netdev@vger.kernel.org Cc: davem@davemloft.net, nhorman@tuxdriver.com, jiri@mellanox.com, toke@redhat.com, dsahern@gmail.com, roopa@cumulusnetworks.com, nikolay@cumulusnetworks.com, jakub.kicinski@netronome.com, andy@greyhouse.net, f.fainelli@gmail.com, andrew@lunn.ch, vivien.didelot@gmail.com, mlxsw@mellanox.com, Ido Schimmel Subject: [PATCH net-next v2 03/14] drop_monitor: Add basic infrastructure for hardware drops Date: Tue, 13 Aug 2019 10:53:49 +0300 Message-Id: <20190813075400.11841-4-idosch@idosch.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190813075400.11841-1-idosch@idosch.org> References: <20190813075400.11841-1-idosch@idosch.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Ido Schimmel Export a function that can be invoked in order to report packets that were dropped by the underlying hardware along with metadata. Subsequent patches will add support for the different alert modes. Signed-off-by: Ido Schimmel Acked-by: Jiri Pirko --- MAINTAINERS | 1 + include/net/drop_monitor.h | 33 +++++++++++++++++++++++++++++++++ net/core/drop_monitor.c | 28 ++++++++++++++++++++++++++++ 3 files changed, 62 insertions(+) create mode 100644 include/net/drop_monitor.h diff --git a/MAINTAINERS b/MAINTAINERS index e352550a6895..3e567d0b484f 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11148,6 +11148,7 @@ S: Maintained W: https://fedorahosted.org/dropwatch/ F: net/core/drop_monitor.c F: include/uapi/linux/net_dropmon.h +F: include/net/drop_monitor.h NETWORKING DRIVERS M: "David S. Miller" diff --git a/include/net/drop_monitor.h b/include/net/drop_monitor.h new file mode 100644 index 000000000000..2ab668461463 --- /dev/null +++ b/include/net/drop_monitor.h @@ -0,0 +1,33 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef _NET_DROP_MONITOR_H_ +#define _NET_DROP_MONITOR_H_ + +#include +#include +#include + +/** + * struct net_dm_hw_metadata - Hardware-supplied packet metadata. + * @trap_group_name: Hardware trap group name. + * @trap_name: Hardware trap name. + * @input_dev: Input netdevice. + */ +struct net_dm_hw_metadata { + const char *trap_group_name; + const char *trap_name; + struct net_device *input_dev; +}; + +#if IS_ENABLED(CONFIG_NET_DROP_MONITOR) +void net_dm_hw_report(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata); +#else +static inline void +net_dm_hw_report(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata) +{ +} +#endif + +#endif /* _NET_DROP_MONITOR_H_ */ diff --git a/net/core/drop_monitor.c b/net/core/drop_monitor.c index aa9147a18329..6020f34728af 100644 --- a/net/core/drop_monitor.c +++ b/net/core/drop_monitor.c @@ -26,6 +26,7 @@ #include #include #include +#include #include #include @@ -43,6 +44,7 @@ * netlink alerts */ static int trace_state = TRACE_OFF; +static bool monitor_hw; /* net_dm_mutex * @@ -93,6 +95,8 @@ struct net_dm_alert_ops { void (*napi_poll_probe)(void *ignore, struct napi_struct *napi, int work, int budget); void (*work_item_func)(struct work_struct *work); + void (*hw_probe)(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata); }; struct net_dm_skb_cb { @@ -267,10 +271,17 @@ static void trace_napi_poll_hit(void *ignore, struct napi_struct *napi, rcu_read_unlock(); } +static void +net_dm_hw_summary_probe(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata) +{ +} + static const struct net_dm_alert_ops net_dm_alert_summary_ops = { .kfree_skb_probe = trace_kfree_skb_hit, .napi_poll_probe = trace_napi_poll_hit, .work_item_func = send_dm_alert, + .hw_probe = net_dm_hw_summary_probe, }; static void net_dm_packet_trace_kfree_skb_hit(void *ignore, @@ -482,10 +493,17 @@ static void net_dm_packet_work(struct work_struct *work) net_dm_packet_report(skb); } +static void +net_dm_hw_packet_probe(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata) +{ +} + static const struct net_dm_alert_ops net_dm_alert_packet_ops = { .kfree_skb_probe = net_dm_packet_trace_kfree_skb_hit, .napi_poll_probe = net_dm_packet_trace_napi_poll_hit, .work_item_func = net_dm_packet_work, + .hw_probe = net_dm_hw_packet_probe, }; static const struct net_dm_alert_ops *net_dm_alert_ops_arr[] = { @@ -493,6 +511,16 @@ static const struct net_dm_alert_ops *net_dm_alert_ops_arr[] = { [NET_DM_ALERT_MODE_PACKET] = &net_dm_alert_packet_ops, }; +void net_dm_hw_report(struct sk_buff *skb, + const struct net_dm_hw_metadata *hw_metadata) +{ + if (!monitor_hw) + return; + + net_dm_alert_ops_arr[net_dm_alert_mode]->hw_probe(skb, hw_metadata); +} +EXPORT_SYMBOL_GPL(net_dm_hw_report); + static int net_dm_trace_on_set(struct netlink_ext_ack *extack) { const struct net_dm_alert_ops *ops; -- 2.21.0