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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9437EC6FA91 for ; Thu, 8 Sep 2022 17:25:28 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231804AbiIHRZL (ORCPT ); Thu, 8 Sep 2022 13:25:11 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55526 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230337AbiIHRZB (ORCPT ); Thu, 8 Sep 2022 13:25:01 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7AFC44F3AF; Thu, 8 Sep 2022 10:24:57 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 1795D61DC4; Thu, 8 Sep 2022 17:24:57 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7D855C433C1; Thu, 8 Sep 2022 17:24:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1662657896; bh=WFvAjH2w5GVc6nFr7pNbwOG1HEvACl7dXWMHqViQw+4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t5lYUJGXCSDG0moMKIJfyQ2A2Yt+4MF2J7q6c6mbQ4X8DrtiiKies4mYwwNOYKglJ Buek3QIy25r5PP0Lf/65kbnpC+VzrBVqGg+lx+gKQvS8FWtb9tU9fD21RbPJUpHheg S7ugbf45n2gyt/YhAdN0AWRvfLVHnVBtlz67ukrugKuzxxO4+KwVKWaFuCL2b1jWWw G+J2y2ibTvFB+JsCVZEpGSk9z/5Yuhr96eW1oKGkBoQgusweeEkelLgOV6SkiC9Uib U4eOyXxaoR9sl5w1id+pofjHikcNLYZvCc6X4jUpjv1o3dtmW6gDHTY1eJ0dxwNe4q t8/QGSVacu8LQ== From: Jeff Layton To: tytso@mit.edu, adilger.kernel@dilger.ca, djwong@kernel.org, david@fromorbit.com, trondmy@hammerspace.com, neilb@suse.de, viro@zeniv.linux.org.uk, zohar@linux.ibm.com, xiubli@redhat.com, chuck.lever@oracle.com, lczerner@redhat.com, jack@suse.cz, bfields@fieldses.org, brauner@kernel.org, fweimer@redhat.com Cc: linux-btrfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, ceph-devel@vger.kernel.org, linux-ext4@vger.kernel.org, linux-nfs@vger.kernel.org, linux-xfs@vger.kernel.org Subject: [PATCH v5 2/8] ext4: fix i_version handling in ext4 Date: Thu, 8 Sep 2022 13:24:42 -0400 Message-Id: <20220908172448.208585-3-jlayton@kernel.org> X-Mailer: git-send-email 2.37.3 In-Reply-To: <20220908172448.208585-1-jlayton@kernel.org> References: <20220908172448.208585-1-jlayton@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: ceph-devel@vger.kernel.org ext4 currently updates the i_version counter when the atime is updated during a read. This is less than ideal as it can cause unnecessary cache invalidations with NFSv4 and unnecessary remeasurements for IMA. The increment in ext4_mark_iloc_dirty is also problematic since it can corrupt the i_version counter for ea_inodes. We aren't bumping the file times in ext4_mark_iloc_dirty, so changing the i_version there seems wrong, and is the cause of both problems. Remove that callsite and add increments to the setattr, setxattr and ioctl codepaths, at the same times that we update the ctime. The i_version bump that already happens during timestamp updates should take care of the rest. In ext4_move_extents, increment the i_version on both inodes, and also add in missing ctime updates. Cc: Lukas Czerner Reviewed-by: Jan Kara Reviewed-by: Christian Brauner (Microsoft) Signed-off-by: Jeff Layton --- fs/ext4/inode.c | 15 +++++---------- fs/ext4/ioctl.c | 8 ++++++++ fs/ext4/move_extent.c | 8 ++++++++ fs/ext4/xattr.c | 2 ++ 4 files changed, 23 insertions(+), 10 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 2a220be34caa..aa37bce4c541 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -5342,6 +5342,7 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, int error, rc = 0; int orphan = 0; const unsigned int ia_valid = attr->ia_valid; + bool inc_ivers = IS_I_VERSION(inode); if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) return -EIO; @@ -5425,8 +5426,8 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, return -EINVAL; } - if (IS_I_VERSION(inode) && attr->ia_size != inode->i_size) - inode_inc_iversion(inode); + if (attr->ia_size == inode->i_size) + inc_ivers = false; if (shrink) { if (ext4_should_order_data(inode)) { @@ -5528,6 +5529,8 @@ int ext4_setattr(struct user_namespace *mnt_userns, struct dentry *dentry, } if (!error) { + if (inc_ivers) + inode_inc_iversion(inode); setattr_copy(mnt_userns, inode, attr); mark_inode_dirty(inode); } @@ -5731,14 +5734,6 @@ int ext4_mark_iloc_dirty(handle_t *handle, } ext4_fc_track_inode(handle, inode); - /* - * ea_inodes are using i_version for storing reference count, don't - * mess with it - */ - if (IS_I_VERSION(inode) && - !(EXT4_I(inode)->i_flags & EXT4_EA_INODE_FL)) - inode_inc_iversion(inode); - /* the do_update_inode consumes one bh->b_count */ get_bh(iloc->bh); diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 3cf3ec4b1c21..60e77ae9342d 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -452,6 +452,8 @@ static long swap_inode_boot_loader(struct super_block *sb, swap_inode_data(inode, inode_bl); inode->i_ctime = inode_bl->i_ctime = current_time(inode); + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); inode->i_generation = prandom_u32(); inode_bl->i_generation = prandom_u32(); @@ -665,6 +667,8 @@ static int ext4_ioctl_setflags(struct inode *inode, ext4_set_inode_flags(inode, false); inode->i_ctime = current_time(inode); + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); err = ext4_mark_iloc_dirty(handle, inode, &iloc); flags_err: @@ -775,6 +779,8 @@ static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) EXT4_I(inode)->i_projid = kprojid; inode->i_ctime = current_time(inode); + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); out_dirty: rc = ext4_mark_iloc_dirty(handle, inode, &iloc); if (!err) @@ -1257,6 +1263,8 @@ static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg) err = ext4_reserve_inode_write(handle, inode, &iloc); if (err == 0) { inode->i_ctime = current_time(inode); + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); inode->i_generation = generation; err = ext4_mark_iloc_dirty(handle, inode, &iloc); } diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 701f1d6a217f..d73ab3153218 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -683,6 +684,13 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk, break; o_start += cur_len; d_start += cur_len; + + orig_inode->i_ctime = current_time(orig_inode); + donor_inode->i_ctime = current_time(donor_inode); + if (IS_I_VERSION(orig_inode)) + inode_inc_iversion(orig_inode); + if (IS_I_VERSION(donor_inode)) + inode_inc_iversion(donor_inode); } *moved_len = o_start - orig_blk; if (*moved_len > len) diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c index 533216e80fa2..e975442e4ab2 100644 --- a/fs/ext4/xattr.c +++ b/fs/ext4/xattr.c @@ -2412,6 +2412,8 @@ ext4_xattr_set_handle(handle_t *handle, struct inode *inode, int name_index, if (!error) { ext4_xattr_update_super_block(handle, inode->i_sb); inode->i_ctime = current_time(inode); + if (IS_I_VERSION(inode)) + inode_inc_iversion(inode); if (!value) no_expand = 0; error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); -- 2.37.3