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=-16.3 required=3.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT, USER_IN_DEF_DKIM_WL 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 AB4DFC31E45 for ; Thu, 13 Jun 2019 22:34:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 7F58920B7C for ; Thu, 13 Jun 2019 22:34:25 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="Smy3Jh0x" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727044AbfFMWeX (ORCPT ); Thu, 13 Jun 2019 18:34:23 -0400 Received: from mail-qt1-f202.google.com ([209.85.160.202]:41195 "EHLO mail-qt1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726921AbfFMWeU (ORCPT ); Thu, 13 Jun 2019 18:34:20 -0400 Received: by mail-qt1-f202.google.com with SMTP id e39so465533qte.8 for ; Thu, 13 Jun 2019 15:34:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=date:in-reply-to:message-id:mime-version:references:subject:from:to :cc; bh=LEbx6Py1LlxNnYNfMUQLEHmXYGAjBktMwzf11o00qiQ=; b=Smy3Jh0xPWHxt5WDJ+8KkM+LzEnH7FyKOFRSiuheeGSq98m3pPRdHAqXEezsiMyAbX 1h4Uqu90fX9XGFJZwaDpIJGGL+QNNxoCI0Jdr6XBxHiS9fCvNMKc+RtJGZbq9JNibFdQ Buruwhxy9ly9ARec8g9nh9YNono+ejunCF26DFpBY3UFknHuMr16eMHyiYH/7sHg18xO 3AcP7YZU7rRfP5sniNezbdqmdA7tNJgEh/s8YmsiPBXOjyzcWAGFHCUmdn1v+yk2Ff+O B4pPLKgZuC/08CFWCguu+2yNzdZ8oxCTdJxtBsekaTar8Ydc5dl0iMrnBm9xABuYz7Ei Jzlw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:in-reply-to:message-id:mime-version :references:subject:from:to:cc; bh=LEbx6Py1LlxNnYNfMUQLEHmXYGAjBktMwzf11o00qiQ=; b=bEjJHrIrJKooVCtT4nX1iezr/t3yFHv/TH4aunyCc1NSxFgn2ifKbKl7DEOz0U1YNt AJ3N702AEI3KquHy4KYneEwvByQsKSbaKtTukypu229uKGe3RlQq2lAq0MYOV1Fms05h Lopo/TItUUltVNg81PIO6reN5UH5m8fQC91sPO2bF0Sptr+cTFg952xlbJPyNd1dV+9P 8VdC5bK9EQ5fyrO37D7PUZAI3FGyqWNXxOn9zHZHQsUko6EZeUcUwWE9jRiGxxLBUShO 6aNB0rblXH8TVUNxHVAsHcMs6KnjdG3WntK1Mbn3e3yiyQJ5OtWgpDlzBfyRSt3EopVK IISg== X-Gm-Message-State: APjAAAXKPQl/SYWFHJphF6pJJo/JjcPnXO3OYE2t2x8geDcgaop7/NtG 3i1dRGf4ipxtNYJj+M5WpTXdzf7dq1zrzKoEdbj7c3h6DjI/uSX1HBxCxaeWYjt0mZs/vfEnF43 Keh+ADUqxgYsSMDcBOIlOKdtL+M+gbbL+enXv+Ikwu3s8Dul31NZlyFxrkfCbaf4Fetg= X-Google-Smtp-Source: APXvYqzPVM+hxKCGgOVop12/mUhf51zpio33hHg87tz8aaGPy+G5h7ILBQFuMHAA1crz0uCPLsKvZ9lqaw== X-Received: by 2002:a0c:d196:: with SMTP id e22mr5472255qvh.75.1560465259477; Thu, 13 Jun 2019 15:34:19 -0700 (PDT) Date: Thu, 13 Jun 2019 15:34:08 -0700 In-Reply-To: <20190613223408.139221-1-fengc@google.com> Message-Id: <20190613223408.139221-4-fengc@google.com> Mime-Version: 1.0 References: <20190613223408.139221-1-fengc@google.com> X-Mailer: git-send-email 2.22.0.410.gd8fdbe21b5-goog Subject: [PATCH v5 3/3] dma-buf: add show_fdinfo handler From: Chenbo Feng To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Cc: Sumit Semwal , kernel-team@android.com Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Greg Hackmann The show_fdinfo handler exports the same information available through debugfs on a per-buffer basis. Signed-off-by: Greg Hackmann Signed-off-by: Chenbo Feng --- drivers/dma-buf/dma-buf.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 2c862e36c947..49a5cb7c705d 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -397,6 +397,20 @@ static long dma_buf_ioctl(struct file *file, } } +static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file) +{ + struct dma_buf *dmabuf = file->private_data; + + seq_printf(m, "size:\t%zu\n", dmabuf->size); + /* Don't count the temporary reference taken inside procfs seq_show */ + seq_printf(m, "count:\t%ld\n", file_count(dmabuf->file) - 1); + seq_printf(m, "exp_name:\t%s\n", dmabuf->exp_name); + mutex_lock(&dmabuf->lock); + if (dmabuf->name) + seq_printf(m, "name:\t%s\n", dmabuf->name); + mutex_unlock(&dmabuf->lock); +} + static const struct file_operations dma_buf_fops = { .release = dma_buf_release, .mmap = dma_buf_mmap_internal, @@ -406,6 +420,7 @@ static const struct file_operations dma_buf_fops = { #ifdef CONFIG_COMPAT .compat_ioctl = dma_buf_ioctl, #endif + .show_fdinfo = dma_buf_show_fdinfo, }; /* -- 2.22.0.410.gd8fdbe21b5-goog