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=-16.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,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 6E432C43218 for ; Mon, 10 Jun 2019 23:52:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 459DE206C3 for ; Mon, 10 Jun 2019 23:52:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="KAN6/KWK" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390892AbfFJXwO (ORCPT ); Mon, 10 Jun 2019 19:52:14 -0400 Received: from mail-qk1-f201.google.com ([209.85.222.201]:38196 "EHLO mail-qk1-f201.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390682AbfFJXwM (ORCPT ); Mon, 10 Jun 2019 19:52:12 -0400 Received: by mail-qk1-f201.google.com with SMTP id n190so9512660qkd.5 for ; Mon, 10 Jun 2019 16:52:11 -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=ud/bw4V77SyFt8nVuKDtI0QWt52VBA0pzrjbI+vip8M=; b=KAN6/KWKmZUHGkzA9fGRB0gmQg1st991k9TnAZHO0PVnyG/tFwNFeClhlR8QIhgMmc ySp4Mjm1oKbocU4TYzPvBXKryJNQRzJs4yKNjRX3Xj626CmIKFKPE1k4/auhPTABTjDm bAObuyqNR78lPx6zonAIzf8sku2qHPqRzC7PYxP8BRy7uvvxcKvHFlOMz/Nvi8CbMuyR d69Hr+YKWiC/nBr5l7sBAi5IvsgKQH4zr65RTFj8q75fQic4bswDtYm7DjNq741gTMdA aWZooTU7blyJslshfe86WWadiZ3w9pNuRcRgtdeQdcsEVrMkJa2d3/KUI9VsQivIV+4W +wFw== 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=ud/bw4V77SyFt8nVuKDtI0QWt52VBA0pzrjbI+vip8M=; b=LGZGcLx5e3ZcT1xZFysuTYubFQOOmdIBMk/CWc5URr621im7aIK34SRK8Jy1dsk5ww n/Mkd+0X+N8arkYaTyujQ41dtOfoav4tlB36ADwR3qjBD54bCi2jyRnLEzrAdVuNLgA8 3c/AToOq//PTBWAXKj5a1jYWHC7qdvxM6YJN9xt3paS4mo7dnPNROCAlUa+yjebfeClD 0peTvcMIA+y1y674hPw5Mwxi5iIMwc02jE4/XCOG9ECtm4b4qy7ftgGK8y8GTR3aWJBu 1CFItkAfg6ipfQJEc+VwnEb7XE5xhVS6779FWKcQMYt0IHldclSccB5maUhTRvZ2C2zS qnPA== X-Gm-Message-State: APjAAAV7nAv5lTgKJTDK3GRiypIT39i1+OW9wJH6+Fcjmv6UGNHi5Mfx MT4z77FasV+gGOJHuAUTg7+W1GH1WBoZ6jjZOnAJPGRW/zIXtL4ePXPGvOgWjDYt25x/xF0BRjs TpZs1/or3nq8IzY41WEyY2hYEZRU9F4/Q+NVL1R8J5dGIYId1f2deC7T7vZuf0xZUkZQ= X-Google-Smtp-Source: APXvYqzmXbzsD3tHKHiIsN5XXzhsSJvjTCuBQqiKTV7myw/rxhDuWjYx7IJNlPfLcNFc2OLFeWBMMGJi/Q== X-Received: by 2002:a0c:81e7:: with SMTP id 36mr26133271qve.5.1560210731131; Mon, 10 Jun 2019 16:52:11 -0700 (PDT) Date: Mon, 10 Jun 2019 16:52:01 -0700 In-Reply-To: <20190610235201.145457-1-fengc@google.com> Message-Id: <20190610235201.145457-4-fengc@google.com> Mime-Version: 1.0 References: <20190610235201.145457-1-fengc@google.com> X-Mailer: git-send-email 2.22.0.rc2.383.gf4fbbf30c2-goog Subject: [RESEND PATCH v3 3/3] dma-buf: add show_fdinfo handler From: Chenbo Feng To: linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, --validate@google.com Cc: Sumit Semwal , Daniel Vetter , 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, }; /* -- 2.22.0.rc2.383.gf4fbbf30c2-goog