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=-11.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,INCLUDES_CR_TRAILER,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B9370C433DB for ; Fri, 8 Jan 2021 21:55:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3E12A23A9D for ; Fri, 8 Jan 2021 21:55:12 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3E12A23A9D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 3B5F18D01AC; Fri, 8 Jan 2021 16:55:12 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 366B66B00B5; Fri, 8 Jan 2021 16:55:12 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 254C88D01AC; Fri, 8 Jan 2021 16:55:12 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0193.hostedemail.com [216.40.44.193]) by kanga.kvack.org (Postfix) with ESMTP id 0ABBB6B00AA for ; Fri, 8 Jan 2021 16:55:12 -0500 (EST) Received: from smtpin28.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with ESMTP id BB72A1DE3 for ; Fri, 8 Jan 2021 21:55:11 +0000 (UTC) X-FDA: 77683964022.28.work31_2a11da3274f6 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin28.hostedemail.com (Postfix) with ESMTP id 9B93D6D66 for ; Fri, 8 Jan 2021 21:55:11 +0000 (UTC) X-HE-Tag: work31_2a11da3274f6 X-Filterd-Recvd-Size: 2977 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf42.hostedemail.com (Postfix) with ESMTP for ; Fri, 8 Jan 2021 21:55:11 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id A795F23AC2 for ; Fri, 8 Jan 2021 21:55:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1610142910; bh=Hk0CcdSqbF4KFVlSIMVJ6KCBS/vMpc81zH5BVzJpxB4=; h=References:In-Reply-To:From:Date:Subject:To:Cc:From; b=QGSQpqkln/7Rg6AhjY8YfQPWBqjdq80LLwmsWLPIkIjAX/aQprBqjQiRss59E3zPB 906nIByV9eLFRNcz+PTpjYtuIgXfnd5a6FuqA4SMK3U0TsjqyVGwPICSPq/DwANYrb owUP+PrDiAq4KG4FMZ/tmcEr1EbNthJ9OkAFECFA0igEA0DGF/d2Gghlx5btcsJqDT zhm7Ur1ZllYtCH7rpGH8DraFgUa0QA+61yp5IWzgQhLcS1eiC4/U7+DwxKSHquXHzg wznWIEUMeb62ZFLZnPsbSfF9YokL4rzoY3eg6QhqHTEKKQNBDEr5oZgmkeGc7nTOC1 oR79kxb8nCZPQ== Received: by mail-lf1-f46.google.com with SMTP id a12so26448339lfl.6 for ; Fri, 08 Jan 2021 13:55:09 -0800 (PST) X-Gm-Message-State: AOAM531npj22/7QwWzHwUTYCrkpTdwn4xUFL9lV3cqnGSNJ5kN9a6DZ4 7czowvS4uscJL+1blW+hHm069ktmmcEElWqVE4jd/Q== X-Google-Smtp-Source: ABdhPJxHeVaZsDHkpkEu6hFJwhbFcv8avKT4mhcAQSev5tIWjsHZ9IgmwDJ+7RoulRb5BCyekcuCBBLYlkzXAidWCOo= X-Received: by 2002:a19:5ca:: with SMTP id 193mr2552974lff.375.1610142907841; Fri, 08 Jan 2021 13:55:07 -0800 (PST) MIME-Version: 1.0 References: <20210107041801.2003241-1-songliubraving@fb.com> <20210107041801.2003241-3-songliubraving@fb.com> In-Reply-To: <20210107041801.2003241-3-songliubraving@fb.com> From: KP Singh Date: Fri, 8 Jan 2021 22:54:57 +0100 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH v3 bpf-next 2/4] bpf: allow bpf_d_path in sleepable bpf_iter program To: Song Liu Cc: bpf , Networking , linux-mm@kvack.org, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , John Fastabend , Kernel Team , Andrew Morton , Yonghong Song Content-Type: text/plain; charset="UTF-8" X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, Jan 7, 2021 at 5:23 AM Song Liu wrote: > > task_file and task_vma iter programs have access to file->f_path. Enable > bpf_d_path to print paths of these file. > > bpf_iter programs are generally called in sleepable context. However, it > is still necessary to diffientiate sleepable and non-sleepable bpf_iter > programs: sleepable programs have access to bpf_d_path; non-sleepable > programs have access to bpf_spin_lock. > > Acked-by: Yonghong Song > Signed-off-by: Song Liu Acked-by: KP Singh