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=-16.5 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,T_DKIMWL_WL_MED,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 35F87C04AB3 for ; Fri, 10 May 2019 00:00:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 062E02182B for ; Fri, 10 May 2019 00:00:47 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="IaPLSmzK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726947AbfEJAAq (ORCPT ); Thu, 9 May 2019 20:00:46 -0400 Received: from mail-vk1-f202.google.com ([209.85.221.202]:53331 "EHLO mail-vk1-f202.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726902AbfEJAAo (ORCPT ); Thu, 9 May 2019 20:00:44 -0400 Received: by mail-vk1-f202.google.com with SMTP id g12so1679315vkf.20 for ; Thu, 09 May 2019 17:00:43 -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=qD8P7476YfiQtjv1E6lcuRrJ6WjHMdxq7Sq+F+HQQEQ=; b=IaPLSmzKORGLubRZrX1/p4t4QHdGUfNfnAEmoGdLAHRQoPsbSW6uDDBJOb9f3LXHek sk+DwsYhcfhq+7j7K45imBSSCNuSDwLYpIRvzQc8+Nu5EJrX/tI4imfG8SYqs9ghzmuM EWqHxg0TO7vL6iRBOVhbxCQr9Frq6HSfIio/r8BFcFG3YqICHmpbYug5nLJyKSSuIZnm 4z9JtbJZ6F/gyewF5ZKdOLsVPObowxwUPTH8fP2+Jab1Q4XT5XJSoLn509G7HlSfKNux OQ1pHDC1iRC+lLM1SfCg3g+mij6MB0TAg6QuSwiXXC4ZX3CoHijLVAdRnvhmiGsvI+j4 5Aow== 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=qD8P7476YfiQtjv1E6lcuRrJ6WjHMdxq7Sq+F+HQQEQ=; b=An/s+uapit1gRN1lNYbpdMN+cMvqA543cWkh3svMTarPBZc0LC0Mw/Omb2j/GJUWD/ N9iipvle3ALX8lhPgZHrNBajrDFO9yJbXqLwqhMaA1TRKDook+/dVBA6ZSfcUnS5PZTD LP6xCIAAYIsoKqAOVPHFNhDf605rEsxKeQukzl16Ibny4Ds+8MrxSXukQRpcDzz9PdrM h+R0M38H5ZkKHlc5zzjafC0n8V0Jkdnc9lYV8aHfOkNhRMfJS3+hupmWFbKNjA/IKv5t ZCPjBVyU7pW9j2LvVQugqjCAJ+Kj33yCZLfCRl7AkENawY/iCg8cKj39ayHi9Ph2FOkE IeIA== X-Gm-Message-State: APjAAAVAP1J89CA5xI0NEPW4w1J6B00dghULFI01z3EFdsSu2FQxBdcH woQn1H4h0VgYlnJrTCkeoN/LNBnt1q/ACJGDLG1AuAGiD1/F9ipVm9W3jLK1N1+2T9oXXVhypab mEm2Sxvdei67Rds6FV44Iu55khuszCGT42dx+PSvYJcY6OBmxsqMGfVW7nocFzK7iAdU= X-Google-Smtp-Source: APXvYqyQxj4h5EKFqbJwstNLfU5pFLcxwQyE6tubj5ad3UX+SHoN3VqGEtU8yaujXV/3yBwO0e+/NOKcuw== X-Received: by 2002:a67:79ca:: with SMTP id u193mr3938693vsc.20.1557446442991; Thu, 09 May 2019 17:00:42 -0700 (PDT) Date: Thu, 9 May 2019 17:00:32 -0700 In-Reply-To: <20190510000032.40749-1-fengc@google.com> Message-Id: <20190510000032.40749-4-fengc@google.com> Mime-Version: 1.0 References: <20190510000032.40749-1-fengc@google.com> X-Mailer: git-send-email 2.21.0.1020.gf2820cf01a-goog Subject: [dma-buf v3 3/3] dma-buf: add show_fdinfo handler From: Chenbo Feng To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-media@vger.kernel.org Cc: Sumit Semwal , Daniel Vetter , erickreyes@google.com, 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 c1da5f9ce44d..c4efc272fc34 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -381,6 +381,20 @@ 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, @@ -390,6 +404,7 @@ static const struct file_operations dma_buf_fops = { #ifdef CONFIG_COMPAT .compat_ioctl = dma_buf_ioctl, #endif + .show_fdinfo = dma_buf_show_fdinfo, }; /* -- 2.21.0.1020.gf2820cf01a-goog