From owner-freebsd-wireless@freebsd.org Sat Nov 4 23:49:51 2017 Return-Path: Delivered-To: freebsd-wireless@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 484B9E59EB4 for ; Sat, 4 Nov 2017 23:49:51 +0000 (UTC) (envelope-from khanzf@gmail.com) Received: from mail-qt0-x22c.google.com (mail-qt0-x22c.google.com [IPv6:2607:f8b0:400d:c0d::22c]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 0A18C3FCD for ; Sat, 4 Nov 2017 23:49:50 +0000 (UTC) (envelope-from khanzf@gmail.com) Received: by mail-qt0-x22c.google.com with SMTP id v41so7166554qtv.12 for ; Sat, 04 Nov 2017 16:49:50 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=to:from:subject:message-id:date:user-agent:mime-version :content-language:content-transfer-encoding; bh=GVRfiAU7kVila5T9DWtffO456BE92F6qWuV9WxzoU+8=; b=mYKWdm7ciSyv6OWO50vE6PlkjqycpjeS516yD6CyKOfIoudOjqMb77mrcZUZn7ZrKE /Xeb0/M5z3B0pXGvdXYBsEbX4+2sL6AAbopMud2iwHJYmXKu9rrViicxcfel1MiFlf5v AVyMP5RsRnNqqh3/UFE5fB9mqhUmGDhBltPFV4qhJyPLxKM0z2T8HZnEffM7ZUJSrNXC Q/zZHm36T0yZm6P5AJ5znGPkU4YfK2Hzgb8fsje+Ci17dFcpt850G3AHyizrIpBiwlPc 7cSG8jdl6v6c0K9IF8VFFOVX1xGEwyaTGkOLtG6FJB0yuyVHNV5E+h6km8tRGdSqDEIj Z+0A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:to:from:subject:message-id:date:user-agent :mime-version:content-language:content-transfer-encoding; bh=GVRfiAU7kVila5T9DWtffO456BE92F6qWuV9WxzoU+8=; b=tNs49lJ4EnH3Lobh+3lN+/B9TuFPlu9cwUUCttaYM/PMaiIR6sMhQr4H56rP/FZPUn 2Ijsy/c1pzOumR/jJvUbI1sfq1Jy8YP1uAbqo20H7uX/q9X1ylJ9tfLhRE5PZDhvcv/U GXPCQnrDYSo1REHJTkdlAh3dUD/eTeYuW15o7cmAfg6S5VHeNVJny5u0Noqqzb0WwAzy JFjMLvp5fHa+Wtd+QREdG1l+PLiF9vT2mpDBBkcfs+caygeXWAjo8aixziIwKgPivMrf WCIGNW0G42bCBJW7A7yk3dMUiuOCgGgbN9gWk8SQSaftVeEZHBOxYa14nXGkZkklc14Z lQmA== X-Gm-Message-State: AMCzsaVhE4u7F6scbiJpx4aXSTWmxFMjvKgFznIb93AkXdhzUGFzObCN cTpdaDvk1XRwOhNG9UsnJtcqeK8K X-Google-Smtp-Source: ABhQp+QFJzwoCPeybAGk2BBpag80eEutp6UYvzCw77Ie9mOjiQXDuwjDy1u2QKyVjh+BrqcmI5i7IQ== X-Received: by 10.237.37.76 with SMTP id w12mr16656278qtc.201.1509839389777; Sat, 04 Nov 2017 16:49:49 -0700 (PDT) Received: from pc.farhan.codes ([2001:470:8:209::dead:c0de]) by smtp.gmail.com with ESMTPSA id y15sm6223338qtc.11.2017.11.04.16.49.48 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 04 Nov 2017 16:49:48 -0700 (PDT) To: freebsd-wireless@freebsd.org From: Farhan Khan Subject: Identify cause of ieee80211_get_counter Message-ID: <9f785504-1920-dee3-b3d7-55538b538c9f@gmail.com> Date: Sat, 4 Nov 2017 19:49:47 -0400 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.4.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-wireless@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Discussions of 802.11 stack, tools device driver development." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 04 Nov 2017 23:49:51 -0000 Hi everyone. I am working through the driver, and running into some ieee80211_get_counter()'s. Per sys/net80211/ieee80211.c, the comment says "Add underlying device errors to vap errors", which implies that it will only trigger when an error occurs. Is there a way to identify what the cause of the function call is? I ran dtrace against "fbt:kernel:ieee80211_get_counter:entry" with a stack() trace as follows: CPU ID FUNCTION:NAME 3 17127 ieee80211_get_counter:entry kernel`if_data_copy+0xa1 kernel`sysctl_rtsock+0x2b6 kernel`sysctl_root_handler_locked+0x7b kernel`sysctl_root+0x1c6 kernel`userland_sysctl+0x148 kernel`sys___sysctl+0x5f kernel`amd64_syscall+0x79b kernel`0xffffffff80ed07bb Is there an efficient way to identify what the cause of the error is? Thank you, -- Farhan Khan PGP Fingerprint: B28D 2726 E2BC A97E 3854 5ABE 9A9F 00BC D525 16EE