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 14224C31E45 for ; Thu, 13 Jun 2019 17:15:32 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id DE4EA2063F for ; Thu, 13 Jun 2019 17:15:31 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="svuswpTB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393658AbfFMRPa (ORCPT ); Thu, 13 Jun 2019 13:15:30 -0400 Received: from mail-oi1-f201.google.com ([209.85.167.201]:40105 "EHLO mail-oi1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728774AbfFLVse (ORCPT ); Wed, 12 Jun 2019 17:48:34 -0400 Received: by mail-oi1-f201.google.com with SMTP id j22so4359840oib.7 for ; Wed, 12 Jun 2019 14:48:34 -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=xFZI9Cn8XQ9WD/uM2zeIjsdArEKjTB6MEJpCpF8H2cY=; b=svuswpTBA4Vx+DLei1h+oVomOQmLsZNHTti0CIQZQVpzQDIyHeME0lAHPve5gT8exd E79eA8Ev5/qmWH+q1GOZI/aoxL+R3S0AW9XY83rHhXMkYf3xYQNqMgX+ONGiiVasflGI eI4w2zUXmOl99uOnNm49b46Ho4C7q5YMdGb57vi+f+sAvCHkeXb/szZbGc1dYp0RHLUX Bb7SqaKZDqXDMG/xtvv6j+JphFCnnBeglrzOcsw04pOqmrnqEZOKJYQBPtYglaBDlDdo k8HUtS4ismdMPZzP+d61mUgOI2udfdS0JqERvV7uLB3RxgaFRt3+YQiwnIdWGJ5Hgvtl 5Usw== 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=xFZI9Cn8XQ9WD/uM2zeIjsdArEKjTB6MEJpCpF8H2cY=; b=LE/dO81ipvmEGsFWV3Snt6dE9nkZORHBwGjcCiMAdaJS3bRfeYf1GHSXBWD21jk0bP nICclmO+EKW0QxLJw5HXIjy6HlJyr6euS1Y7/R3DM/X/1KenrKchbRoYTgPIvuNK0I0O zaJKX72AbAp9/mqdwharmlnU4eTY+0lkvG94X/9Y+5Sh5PS+XjOijfpovBYUrcxbLC3S V3KqbYjCcihhCfsIeU53wCyvB64jB/n61WtznwNsMN0ynXi8u5E7JayJlHwkC8/OMeLx uureHGc8Gnh4yxHYDy7d2VI7zaOrcoOgLKhO4Qxs2/wsiosHuuMdYKfOnGX2XINRr6by g/yQ== X-Gm-Message-State: APjAAAWH8cOO6qnmVXxQGxRI6lmWUv/tYLCvOiMl0u7snz7Hxz81ave/ +PDZjmTmNZt8BwjE8gtxSeTIPE21ZKJEq6NBVVuTxpki33u9dV4YB/DXSfEo6xQ5Vr/WrgxZMUM DStCEZPTudihJnWED9c58VnNJaQXQIDr1BP+u1HXaWwTqlSVkjsC2UXQZRzJljKjJkV0= X-Google-Smtp-Source: APXvYqxn5WIL38quMvWm0NFNVoCMoq509G4lVulP6aIh3DMM/7wKweu86NGynkKEkLolsMXyoApH36EYpQ== X-Received: by 2002:a9d:7650:: with SMTP id o16mr19689292otl.0.1560376114065; Wed, 12 Jun 2019 14:48:34 -0700 (PDT) Date: Wed, 12 Jun 2019 14:48:23 -0700 In-Reply-To: <20190612214823.251491-1-fengc@google.com> Message-Id: <20190612214823.251491-4-fengc@google.com> Mime-Version: 1.0 References: <20190612214823.251491-1-fengc@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [PATCH v4 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 87a928c93c1a..ff8421668331 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -396,6 +396,20 @@ 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, @@ -405,6 +419,7 @@ 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.rc2.383.gf4fbbf30c2-goog