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 1E449C28B2B for ; Wed, 17 Aug 2022 16:26:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237964AbiHQQ0n (ORCPT ); Wed, 17 Aug 2022 12:26:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49952 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236463AbiHQQ0m (ORCPT ); Wed, 17 Aug 2022 12:26:42 -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 7D1379F75E; Wed, 17 Aug 2022 09:26:41 -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 F2C0360A06; Wed, 17 Aug 2022 16:26:40 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88B54C433C1; Wed, 17 Aug 2022 16:26:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1660753600; bh=z8fowFvlZJhtx+C5R3v6t8hzQBfOl9cMVA+2s2zdkmM=; h=From:To:Cc:Subject:Date:From; b=KjdLUTPc9mzqZmU4rJ7YoYnwC0KEDSTD7yT0hnHFM1Z389WngAgpiDdOz2MNrWpFj 2Lib+De6X6BO5G9a1kG9zHklxQ6dzxAMwDEdNxdWRiywuw7I+jshNbt2KfwAoAWzUf 3tUTqKDq+BzsNtgtWE/eFlTpvL7N4VmTpIkqh7PsT0OYqId/bylMQIgFXb7qmrSjwy eW/qqFKLLsn24Q2ZWcwoi4WaPOMl8rMsK57RBV+21LP+22mPSkYNn9hl6hI4aiolhJ HdOYkdmBVGGT8qxiFNSCRzAwmrk5egV7BqhZeYn3CTNxisEas2Cr5iTItrpmjjhUva /q6k3zA2Xk94w== From: Jeff Layton To: tytso@mit.edu, adilger.kernel@dilger.ca Cc: linux-ext4@vger.kernel.org, linux-fsdevel@vger.kernel.org, Lukas Czerner , Christian Brauner , Jan Kara Subject: [PATCH v2] ext4: fix i_version handling in ext4 Date: Wed, 17 Aug 2022 12:26:38 -0400 Message-Id: <20220817162638.133341-1-jlayton@kernel.org> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@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 also 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 time 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 Cc: Christian Brauner Cc: Jan Kara Signed-off-by: Jeff Layton --- fs/ext4/inode.c | 10 +++++----- fs/ext4/ioctl.c | 4 ++++ fs/ext4/move_extent.c | 6 ++++++ fs/ext4/xattr.c | 2 ++ 4 files changed, 17 insertions(+), 5 deletions(-) diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 601214453c3a..a70921df89a5 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_IVERSION(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); } @@ -5731,9 +5734,6 @@ int ext4_mark_iloc_dirty(handle_t *handle, } ext4_fc_track_inode(handle, inode); - if (IS_I_VERSION(inode)) - 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..ad3a294a88eb 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -452,6 +452,7 @@ 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); + inode_inc_iversion(inode); inode->i_generation = prandom_u32(); inode_bl->i_generation = prandom_u32(); @@ -665,6 +666,7 @@ static int ext4_ioctl_setflags(struct inode *inode, ext4_set_inode_flags(inode, false); inode->i_ctime = current_time(inode); + inode_inc_iversion(inode); err = ext4_mark_iloc_dirty(handle, inode, &iloc); flags_err: @@ -775,6 +777,7 @@ static int ext4_ioctl_setproject(struct inode *inode, __u32 projid) EXT4_I(inode)->i_projid = kprojid; inode->i_ctime = current_time(inode); + inode_inc_iversion(inode); out_dirty: rc = ext4_mark_iloc_dirty(handle, inode, &iloc); if (!err) @@ -1257,6 +1260,7 @@ 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); + 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..285700b00d38 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -6,6 +6,7 @@ */ #include +#include #include #include #include @@ -683,6 +684,11 @@ 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); + inode_inc_iversion(orig_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..4d84919d1c9c 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_IVERSION(inode)) + inode_inc_iversion(inode); if (!value) no_expand = 0; error = ext4_mark_iloc_dirty(handle, inode, &is.iloc); -- 2.37.2