From patchwork Thu Jan 28 18:24:31 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kalesh Singh X-Patchwork-Id: 12054361 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=-26.3 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT,USER_IN_DEF_DKIM_WL autolearn=unavailable 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 EF417C433DB for ; Thu, 28 Jan 2021 18:28:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A9AAC64E24 for ; Thu, 28 Jan 2021 18:28:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231810AbhA1S2S (ORCPT ); Thu, 28 Jan 2021 13:28:18 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37352 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232083AbhA1SZe (ORCPT ); Thu, 28 Jan 2021 13:25:34 -0500 Received: from mail-qt1-x849.google.com (mail-qt1-x849.google.com [IPv6:2607:f8b0:4864:20::849]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4CE78C061352 for ; Thu, 28 Jan 2021 10:24:54 -0800 (PST) Received: by mail-qt1-x849.google.com with SMTP id f51so2406543qtc.23 for ; Thu, 28 Jan 2021 10:24:54 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=sender:date:in-reply-to:message-id:mime-version:references:subject :from:cc; bh=WO1Ps+Nvd/JhtfCCjwBjp1ZIkFI1epnqyV7iKoI3o6M=; b=kRyxNq1z6aP1oLR+T1rDCvOOEGgGBd0NT0WYQCd9JMMaGJ9KZ64ABn23wgetcIYIqk UgxIRZh2IxqO8TLPZAYS8UscufK7YBfdmAnzf6Thg7OwTRAEIGh+lDriUPVXWyxVBiTP vSV+VOHOKLatUnPHfVn57s9k68KhZe3ouL0kZrzVPeKvib0crdbJF5QcUQ1R/vr/lvxZ 5FoHOJuQQruMx2fhUaWETT1ilWgTRt+Oqxwg68GfvRRZWi93epDFMlQxz0rY8QA5fdyj Y+WmVV46ZuoEnJrUkdOejUENnnnRes25LJGmKOMoa3ThqhEgE87zWQ8qkxgyvDzhhRdC 5vGg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:date:in-reply-to:message-id:mime-version :references:subject:from:cc; bh=WO1Ps+Nvd/JhtfCCjwBjp1ZIkFI1epnqyV7iKoI3o6M=; b=TAlEqDUNTPw2yMc9IvpDbUJNwPQ0DNkzywPE9tIElVi2DQt0D3ZsYsgOPFbpQHDAuB hhlHM1D7FMpNZX7ljYj19KFAoCVPh0awZeOvrs0TEUx1j997snyDE5vjxWDU3BLuePui 0Gneo3PUcidI+04I4jX1OWTuuneMMP0cOGFRR/lXOK1j/J+BMeSdLvX27ymQEvtT3uF7 RwKQJNrY74wpUp80KQbwr0+8pQsu0jvW1Rr9tUSQ/tfNHiy+UzXUajSOsD5NT+cBTxA4 b6Az5NbVj+Zh4bjD9BS/JCzHXe2+4fP13WKRG9Fa4PM6/pJr/VJMUrJ2yoEnsFgFCCGv W2Qw== X-Gm-Message-State: AOAM531YH+1TOAT9DE+jGPeM1rLZT7nekvVcBZczZ7v5V0WV56FZUm8u pFI+GZjhVKUzJfpueyx5rfTWrRUc/A1PrqukGQ== X-Google-Smtp-Source: ABdhPJxHCqtX2ZHgnqn1x3DYKD86aE5WR934LTPVMRYPiTVg9KKNFMi3ScBW4vQ0zl65Lu8rIgzHGPhMjlBRyKwGrA== Sender: "kaleshsingh via sendgmr" X-Received: from kaleshsingh.c.googlers.com ([fda3:e722:ac3:10:14:4d90:c0a8:2145]) (user=kaleshsingh job=sendgmr) by 2002:ad4:4b6d:: with SMTP id m13mr614841qvx.56.1611858293408; Thu, 28 Jan 2021 10:24:53 -0800 (PST) Date: Thu, 28 Jan 2021 18:24:31 +0000 In-Reply-To: <20210128182432.2216573-1-kaleshsingh@google.com> Message-Id: <20210128182432.2216573-3-kaleshsingh@google.com> Mime-Version: 1.0 References: <20210128182432.2216573-1-kaleshsingh@google.com> X-Mailer: git-send-email 2.30.0.280.ga3ce27912f-goog Subject: [PATCH 2/2] dmabuf: Add dmabuf inode no to fdinfo From: Kalesh Singh Cc: jannh@google.com, jeffv@google.com, keescook@chromium.org, surenb@google.com, minchan@kernel.org, hridya@google.com, kernel-team@android.com, Kalesh Singh , Sumit Semwal , " =?utf-8?q?Christian_K=C3=B6nig?= " , Alexey Dobriyan , "Eric W. Biederman" , Andrew Morton , Alexey Gladkov , Vlastimil Babka , Michel Lespinasse , Bernd Edlinger , Andrei Vagin , Yafang Shao , Christian Brauner , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org To: unlisted-recipients:; (no To-header on input) Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org The dmabuf inode number allows userspace to uniquely identify the buffer and avoids a dependency on /proc//fd/* when accounting per-process DMA buffer sizes. Signed-off-by: Kalesh Singh --- drivers/dma-buf/dma-buf.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 9ad6397aaa97..d869099ede83 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -414,6 +414,7 @@ static void dma_buf_show_fdinfo(struct seq_file *m, struct file *file) { struct dma_buf *dmabuf = file->private_data; + seq_printf(m, "dmabuf_inode_no:\t%lu\n", file_inode(file)->i_ino); 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);