From patchwork Wed Jan 18 17:30:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13106722 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 378C4C32793 for ; Wed, 18 Jan 2023 17:31:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230503AbjARRba (ORCPT ); Wed, 18 Jan 2023 12:31:30 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230501AbjARRbI (ORCPT ); Wed, 18 Jan 2023 12:31:08 -0500 Received: from bombadil.infradead.org (bombadil.infradead.org [IPv6:2607:7c80:54:3::133]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78C5D577F5 for ; Wed, 18 Jan 2023 09:30:47 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=IK5go+LYlZzyyL0UG1E7ybATwbkUdMWL1x4AyvlHUwI=; b=22EHDJ091Mc3KuCstacxTn+6U1 TtnzRBznDgrz0So3oaYkMeFGRgj57zvpXYFUDSdqIZCgYRkHBvwHfNjsXzrP/xQqOVenmai+nAW05 fAdQseByMb+clpStiSc1jaAggo5QN6wpqlWBa4LFiuGeCZQTwywEGcNFv57TECBX0jtat3EobXTs3 AAuTXZlnaD8uWKiY541D53Z2S5GCsZPQrhEooQxpEasFeFqVjWXpIG4T+M4rZXyBOYzvSLrlcDucJ OM2qASNW5swyWRdm0BMqklqdwx4TTiiRsUbp0AvE/p/fb51scw/1RLWSo3a+Nh0FNvVDREyxuYrqN vC+yzHTQ==; Received: from [2001:4bb8:19a:2039:cce7:a1cd:f61c:a80d] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.94.2 #2 (Red Hat Linux)) id 1pICGk-002298-Oz; Wed, 18 Jan 2023 17:30:39 +0000 From: Christoph Hellwig To: Andrew Morton , Mark Fasheh , Joel Becker , Joseph Qi , Evgeniy Dushistov , "Matthew Wilcox (Oracle)" Cc: ocfs2-devel@oss.oracle.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 3/7] minix: fix error handling in minix_set_link Date: Wed, 18 Jan 2023 18:30:23 +0100 Message-Id: <20230118173027.294869-4-hch@lst.de> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230118173027.294869-1-hch@lst.de> References: <20230118173027.294869-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@vger.kernel.org If minix_prepare_chunk fails, updating c/mtime and marking the dir inode dirty is wrong, as the inode hasn't been modified. Also propagate the error to the caller. Note that this moves the dir_put_page call later, but that matches other uses of this helper in the directory code. Signed-off-by: Christoph Hellwig --- fs/minix/dir.c | 22 ++++++++++++---------- fs/minix/minix.h | 3 ++- fs/minix/namei.c | 10 ++++++---- 3 files changed, 20 insertions(+), 15 deletions(-) diff --git a/fs/minix/dir.c b/fs/minix/dir.c index 242e179aa1fbeb..34c1cdb5dc7d47 100644 --- a/fs/minix/dir.c +++ b/fs/minix/dir.c @@ -410,8 +410,8 @@ int minix_empty_dir(struct inode * inode) } /* Releases the page */ -void minix_set_link(struct minix_dir_entry *de, struct page *page, - struct inode *inode) +int minix_set_link(struct minix_dir_entry *de, struct page *page, + struct inode *inode) { struct inode *dir = page->mapping->host; struct minix_sb_info *sbi = minix_sb(dir->i_sb); @@ -420,19 +420,21 @@ void minix_set_link(struct minix_dir_entry *de, struct page *page, int err; lock_page(page); - err = minix_prepare_chunk(page, pos, sbi->s_dirsize); - if (err == 0) { - if (sbi->s_version == MINIX_V3) - ((minix3_dirent *) de)->inode = inode->i_ino; - else - de->inode = inode->i_ino; - err = dir_commit_chunk(page, pos, sbi->s_dirsize); - } else { + if (err) { unlock_page(page); + return err; } + if (sbi->s_version == MINIX_V3) + ((minix3_dirent *)de)->inode = inode->i_ino; + else + de->inode = inode->i_ino; + err = dir_commit_chunk(page, pos, sbi->s_dirsize); + if (err) + return err; dir->i_mtime = dir->i_ctime = current_time(dir); mark_inode_dirty(dir); + return 0; } struct minix_dir_entry * minix_dotdot (struct inode *dir, struct page **p) diff --git a/fs/minix/minix.h b/fs/minix/minix.h index 20217336802570..8f7a636bd1b241 100644 --- a/fs/minix/minix.h +++ b/fs/minix/minix.h @@ -69,7 +69,8 @@ extern int minix_add_link(struct dentry*, struct inode*); extern int minix_delete_entry(struct minix_dir_entry*, struct page*); extern int minix_make_empty(struct inode*, struct inode*); extern int minix_empty_dir(struct inode*); -extern void minix_set_link(struct minix_dir_entry*, struct page*, struct inode*); +int minix_set_link(struct minix_dir_entry *de, struct page *page, + struct inode *inode); extern struct minix_dir_entry *minix_dotdot(struct inode*, struct page**); extern ino_t minix_inode_by_name(struct dentry*); diff --git a/fs/minix/namei.c b/fs/minix/namei.c index 5fc696e032c543..bfbadd85d01032 100644 --- a/fs/minix/namei.c +++ b/fs/minix/namei.c @@ -223,10 +223,11 @@ static int minix_rename(struct user_namespace *mnt_userns, new_de = minix_find_entry(new_dentry, &new_page); if (!new_de) goto out_dir; - err = 0; - minix_set_link(new_de, new_page, old_inode); + err = minix_set_link(new_de, new_page, old_inode); kunmap(new_page); put_page(new_page); + if (err) + goto out_dir; new_inode->i_ctime = current_time(new_inode); if (dir_de) drop_nlink(new_inode); @@ -243,8 +244,9 @@ static int minix_rename(struct user_namespace *mnt_userns, mark_inode_dirty(old_inode); if (dir_de) { - minix_set_link(dir_de, dir_page, new_dir); - inode_dec_link_count(old_dir); + err = minix_set_link(dir_de, dir_page, new_dir); + if (!err) + inode_dec_link_count(old_dir); } out_dir: if (dir_de) {