From patchwork Thu Feb 14 10:00:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Omar Sandoval X-Patchwork-Id: 10812255 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 11E8713B4 for ; Thu, 14 Feb 2019 10:01:04 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 009A72CCD5 for ; Thu, 14 Feb 2019 10:01:04 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id E8F542CD42; Thu, 14 Feb 2019 10:01:03 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D1B1E2CCD5 for ; Thu, 14 Feb 2019 10:01:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2437864AbfBNKBB (ORCPT ); Thu, 14 Feb 2019 05:01:01 -0500 Received: from mail-pf1-f195.google.com ([209.85.210.195]:36321 "EHLO mail-pf1-f195.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2395232AbfBNKBB (ORCPT ); Thu, 14 Feb 2019 05:01:01 -0500 Received: by mail-pf1-f195.google.com with SMTP id n22so2858071pfa.3 for ; Thu, 14 Feb 2019 02:01:00 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=osandov-com.20150623.gappssmtp.com; s=20150623; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=EVYMogBI4jH/67Zve0CCKF3qzn61yTaO8kNdGkw2lp0=; b=B5qmejP/7w2oWJWv/oV+8ZrB5ZN6/sze+t3hgFWrfkCM7axsOBafeMe9/ZeE1Vejqe oOkE46QjKxER2iUcnFlonsqAt94w6CKsARtz/U4VeGPISvM2VP9V24Y3CvUtwX2PnOhl RSUeuGmLajavqOBDi5ZRXL+RM8q/MtTyWdkzZSNc/+X7/1j5rn/J8Hdfw0H9Oh6Ca8z2 jOJLTa/fgDTVhff6K2+G1uIaRXXtvgbZivToTzeGOKfn1/UBdwK2jTYDDV8z+ycyDnh+ ASYhZfS4R0LMXt4O2vy9CyoSxtW9WhXeiwwwSyGC0BhavoWWNu8nMKSENkYpf9IXVwIV mIpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=EVYMogBI4jH/67Zve0CCKF3qzn61yTaO8kNdGkw2lp0=; b=FTkVqoTI2RDgjCM4L8karKTRHqw5+kfwvXZaN/R9ZZevzliYjXftWBJ8gRDIcMbzhn kIrFIvJebC6p/+KSl01JmSnQDIUgqH4MVkDMxIE1AgzYj/HUe0L1aRS1Xs3sVSERlC1K XTllDDvnPJfF4ysGuX5w7WWfnegDEaYq0GzeCfrH1oEmmWKA2Wup3XsDmZwkkKOxfO/1 VVjaGX86/MMqlHNnpY6T+yYCnDcRhP+L76cnI+vq27Tjq3izdIk3sy+5YsItHngIFQTm 2iKO45eSE5JMsXMMMI+TlqluhcAa2eaiaBu0a15tKmQaQpwZZWlS2HgNfWuoqnbc6zNv eUUw== X-Gm-Message-State: AHQUAuaQ8dz5SqNl5xgyROcNUKvnD8dufDJdaiIfIAqLKjh3xvK58g2e QhuCCs+xmmKAzzQug7/qkbRQYLVfVjA= X-Google-Smtp-Source: AHgI3IYIKRGtWY+ZPKyvM7X4BGw9YR0Xss1EIlbxjpL9e1+gb7kdRN23yFkXwhVxYi1FPJUsq1SPHw== X-Received: by 2002:a63:7044:: with SMTP id a4mr2852696pgn.359.1550138459914; Thu, 14 Feb 2019 02:00:59 -0800 (PST) Received: from vader.thefacebook.com ([2620:10d:c090:180::1:5849]) by smtp.gmail.com with ESMTPSA id i184sm2686952pfc.41.2019.02.14.02.00.58 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 14 Feb 2019 02:00:59 -0800 (PST) From: Omar Sandoval To: linux-fsdevel@vger.kernel.org, Al Viro Cc: kernel-team@fb.com, linux-api@vger.kernel.org, linux-btrfs@vger.kernel.org, linux-ext4@vger.kernel.org, linux-f2fs-devel@lists.sourceforge.net, linux-xfs@vger.kernel.org Subject: [RFC PATCH 1/6] fs: add btime to struct iattr Date: Thu, 14 Feb 2019 02:00:08 -0800 Message-Id: <338b960e32ae2bebcf45c738af42a979af112e12.1550136164.git.osandov@fb.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Sender: linux-fsdevel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Omar Sandoval Add btime as an attribute that can be updated through notify_change() if the filesystem supports it, which is indicated by FS_HAS_BTIME in file_system_type->fs_flags. Signed-off-by: Omar Sandoval --- fs/attr.c | 6 ++++++ include/linux/fs.h | 4 ++++ 2 files changed, 10 insertions(+) diff --git a/fs/attr.c b/fs/attr.c index d22e8187477f..4831ef479951 100644 --- a/fs/attr.c +++ b/fs/attr.c @@ -233,6 +233,10 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de WARN_ON_ONCE(!inode_is_locked(inode)); + if ((ia_valid & ATTR_BTIME) && + !(inode->i_sb->s_type->fs_flags & FS_HAS_BTIME)) + return -EOPNOTSUPP; + if (ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID | ATTR_TIMES_SET)) { if (IS_IMMUTABLE(inode) || IS_APPEND(inode)) return -EPERM; @@ -267,6 +271,8 @@ int notify_change(struct dentry * dentry, struct iattr * attr, struct inode **de attr->ia_atime = now; if (!(ia_valid & ATTR_MTIME_SET)) attr->ia_mtime = now; + if (!(ia_valid & ATTR_BTIME_SET)) + attr->ia_btime = now; if (ia_valid & ATTR_KILL_PRIV) { error = security_inode_need_killpriv(dentry); if (error < 0) diff --git a/include/linux/fs.h b/include/linux/fs.h index 29d8e2cfed0e..d66040f7740b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -191,6 +191,8 @@ typedef int (dio_iodone_t)(struct kiocb *iocb, loff_t offset, #define ATTR_OPEN (1 << 15) /* Truncating from open(O_TRUNC) */ #define ATTR_TIMES_SET (1 << 16) #define ATTR_TOUCH (1 << 17) +#define ATTR_BTIME (1 << 18) +#define ATTR_BTIME_SET (1 << 19) /* * Whiteout is represented by a char device. The following constants define the @@ -217,6 +219,7 @@ struct iattr { struct timespec64 ia_atime; struct timespec64 ia_mtime; struct timespec64 ia_ctime; + struct timespec64 ia_btime; /* * Not an attribute, but an auxiliary info for filesystems wanting to @@ -2172,6 +2175,7 @@ struct file_system_type { #define FS_BINARY_MOUNTDATA 2 #define FS_HAS_SUBTYPE 4 #define FS_USERNS_MOUNT 8 /* Can be mounted by userns root */ +#define FS_HAS_BTIME 16 /* Supports getting/setting btime. */ #define FS_RENAME_DOES_D_MOVE 32768 /* FS will handle d_move() during rename() internally. */ struct dentry *(*mount) (struct file_system_type *, int, const char *, void *);