linux-ext4 - [PATCH v2 2/6] Revert "udf: Protect rename against modification of moved directory"

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Date:   Thu,  1 Jun 2023 12:58:22 +0200
From:   Jan Kara <jack@...e.cz>
To:     Al Viro <viro@...IV.linux.org.uk>
Cc:     <linux-fsdevel@...r.kernel.org>,
        Christian Brauner <brauner@...nel.org>,
        Miklos Szeredi <miklos@...redi.hu>,
        "Darrick J. Wong" <djwong@...nel.org>, Ted Tso <tytso@....edu>,
        Jaegeuk Kim <jaegeuk@...nel.org>, <linux-ext4@...r.kernel.org>,
        <linux-xfs@...r.kernel.org>,
        linux-f2fs-devel@...ts.sourceforge.net, Jan Kara <jack@...e.cz>,
        stable@...r.kernel.org
Subject: [PATCH v2 2/6] Revert "udf: Protect rename against modification of moved directory"

This reverts commit f950fd0529130a617b3da526da9fb6a896ce87c2. The
locking is going to be provided by vfs_rename() in the following
patches.

CC: stable@...r.kernel.org
Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/udf/namei.c | 14 ++------------
 1 file changed, 2 insertions(+), 12 deletions(-)

diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index fd20423d3ed2..fd29a66e7241 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -793,11 +793,6 @@ static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 			if (!empty_dir(new_inode))
 				goto out_oiter;
 		}
-		/*
-		 * We need to protect against old_inode getting converted from
-		 * ICB to normal directory.
-		 */
-		inode_lock_nested(old_inode, I_MUTEX_NONDIR2);
 		retval = udf_fiiter_find_entry(old_inode, &dotdot_name,
 					       &diriter);
 		if (retval == -ENOENT) {
@@ -806,10 +801,8 @@ static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 				old_inode->i_ino);
 			retval = -EFSCORRUPTED;
 		}
-		if (retval) {
-			inode_unlock(old_inode);
+		if (retval)
 			goto out_oiter;
-		}
 		has_diriter = true;
 		tloc = lelb_to_cpu(diriter.fi.icb.extLocation);
 		if (udf_get_lb_pblock(old_inode->i_sb, &tloc, 0) !=
@@ -889,7 +882,6 @@ static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 			       udf_dir_entry_len(&diriter.fi));
 		udf_fiiter_write_fi(&diriter, NULL);
 		udf_fiiter_release(&diriter);
-		inode_unlock(old_inode);
 
 		inode_dec_link_count(old_dir);
 		if (new_inode)
@@ -901,10 +893,8 @@ static int udf_rename(struct mnt_idmap *idmap, struct inode *old_dir,
 	}
 	return 0;
 out_oiter:
-	if (has_diriter) {
+	if (has_diriter)
 		udf_fiiter_release(&diriter);
-		inode_unlock(old_inode);
-	}
 	udf_fiiter_release(&oiter);
 
 	return retval;
-- 
2.35.3