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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6399EC433EF for ; Mon, 1 Nov 2021 10:04:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 465A360F58 for ; Mon, 1 Nov 2021 10:04:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232286AbhKAKG4 (ORCPT ); Mon, 1 Nov 2021 06:06:56 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52300 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232100AbhKAKGk (ORCPT ); Mon, 1 Nov 2021 06:06:40 -0400 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5DAA6C0431A1 for ; Mon, 1 Nov 2021 02:38:03 -0700 (PDT) Received: by mail-pl1-x62a.google.com with SMTP id v20so11165672plo.7 for ; Mon, 01 Nov 2021 02:38:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=OBWzc0+NeQrbSJTD0O+NF+bRzjwkf+Is1EvNPBX7xt8=; b=RwzEvxArdInduzZ6igkyKQ/QBTZwwyGw7XuiLzSe40gMmLLxHUdJGH/jCTleTIrY1S bMpq7HCwmcANkwRkyVBn1E9WpsAhRuJXiLoo8mmfYUc0iXGz5lwie1ggBZnex8HOV7eo vZdX+gDsd2wX7Wavvn9gpwK/ZohTm/ECMYGv83i9dRn5CgYwMNhNU0k7QoKqkh6A4ksI BpvRS1TN/uWF6KG0X1ZVmo0D0nWDKUdwkZcbhKJtuB+7fVY0PpnEMfMU0CHCJVk37z/P m+Ol9odxQ43Z/3D6jvvqsaufk9mbHTBSdXhDzXTVM2zDkWCmm1qaDbyZYlrbuDQFEQmk 0UuQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=OBWzc0+NeQrbSJTD0O+NF+bRzjwkf+Is1EvNPBX7xt8=; b=CoQGCjaS96WjjhFt06VWzFWd4nblaJ2rRXcOZA419iRIMoAoMtwVISilSsTQ3blgq2 Psw4EFoEir60XzR4cknD1jp2/FVieCspYB4PA1a39ca+zPa7eJ1kuYaG8Mxo9Bnf1t/n G1k3sQZITBaVylA8zJg3cBg+/QmzHufJZPxb+GB7oBeLkV+WGnOQ5/ytviwIN5u2Axys xOWVm7wgZScQ49HESICtoLQtvEpegxTxmvFDEUPDINmzNa0mwDL29V6UXhc40uHyOQE2 MvR3VK7AT+yBfhzjM67C0CLV+84U/1A6UtDwzwYL1mV/cgXSodVr3jAR7x5c97kk1k8y WK5Q== X-Gm-Message-State: AOAM531mUrLCr3inYIeVJbZPa4mJnF3oJQUcYj7sIhzsOBeTZAL+1ktt blQZijZm+xJA3ciu+QFaEFlw+V339j+1CWw/ X-Google-Smtp-Source: ABdhPJwTAwrmnnDj1l0O33Z6nCqsusIv0u3rVHJPs8TeMvnO7edJm01vLTyKbQJgdLdeCQeGuEn49Q== X-Received: by 2002:a17:902:a60f:b0:141:8996:3fe with SMTP id u15-20020a170902a60f00b00141899603femr23287198plq.71.1635759482972; Mon, 01 Nov 2021 02:38:02 -0700 (PDT) Received: from localhost.localdomain ([139.177.225.242]) by smtp.gmail.com with ESMTPSA id p16sm15738259pfh.97.2021.11.01.02.38.00 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Mon, 01 Nov 2021 02:38:02 -0700 (PDT) From: Muchun Song To: akpm@linux-foundation.org, adobriyan@gmail.com, gladkov.alexey@gmail.com Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, Muchun Song Subject: [PATCH 1/4] fs: proc: store PDE()->data into inode->i_private Date: Mon, 1 Nov 2021 17:35:15 +0800 Message-Id: <20211101093518.86845-2-songmuchun@bytedance.com> X-Mailer: git-send-email 2.21.0 (Apple Git-122) In-Reply-To: <20211101093518.86845-1-songmuchun@bytedance.com> References: <20211101093518.86845-1-songmuchun@bytedance.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org PDE_DATA(inode) is introduced to get user private data and hide the layout of struct proc_dir_entry. The inode->i_private is used to do the same thing as well. Save a copy of user private data to inode-> i_private when proc inode is allocated. This means the user also can get their private data by inode->i_private. Signed-off-by: Muchun Song --- fs/proc/inode.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/proc/inode.c b/fs/proc/inode.c index 599eb724ff2d..f84355c5a36d 100644 --- a/fs/proc/inode.c +++ b/fs/proc/inode.c @@ -650,6 +650,7 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de) return NULL; } + inode->i_private = de->data; inode->i_ino = de->low_ino; inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode); PROC_I(inode)->pde = de; -- 2.11.0