[PATCH v3 2/3] ceph: switch ceph_open() to use new fscrypt helper

From: "Luís Henriques" <lhenriques@suse.de>
To: Eric Biggers <ebiggers@kernel.org>, Xiubo Li <xiubli@redhat.com>,
	Jeff Layton <jlayton@kernel.org>
Cc: "Theodore Y. Ts'o" <tytso@mit.edu>,
	"Jaegeuk Kim" <jaegeuk@kernel.org>,
	"Ilya Dryomov" <idryomov@gmail.com>,
	linux-fscrypt@vger.kernel.org, ceph-devel@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	"Luís Henriques" <lhenriques@suse.de>
Subject: [PATCH v3 2/3] ceph: switch ceph_open() to use new fscrypt helper
Date: Thu, 16 Mar 2023 18:14:12 +0000	[thread overview]
Message-ID: <20230316181413.26916-3-lhenriques@suse.de> (raw)
In-Reply-To: <20230316181413.26916-1-lhenriques@suse.de>

Instead of setting the no-key dentry in ceph_lookup(), use the new
fscrypt_prepare_lookup_partial() helper.  We still need to mark the
directory as incomplete if the directory was just unlocked.

Signed-off-by: Luís Henriques <lhenriques@suse.de>
---
 fs/ceph/dir.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index d8cc6e9d5351..836bc695e2e0 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -784,14 +784,15 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 		return ERR_PTR(-ENAMETOOLONG);
 
 	if (IS_ENCRYPTED(dir)) {
-		err = ceph_fscrypt_prepare_readdir(dir);
+		bool had_key = fscrypt_has_encryption_key(dir);
+
+		err = fscrypt_prepare_lookup_partial(dir, dentry);
 		if (err < 0)
 			return ERR_PTR(err);
-		if (!fscrypt_has_encryption_key(dir)) {
-			spin_lock(&dentry->d_lock);
-			dentry->d_flags |= DCACHE_NOKEY_NAME;
-			spin_unlock(&dentry->d_lock);
-		}
+
+		/* mark directory as incomplete if it has been unlocked */
+		if (!had_key && fscrypt_has_encryption_key(dir))
+			ceph_dir_clear_complete(dir);
 	}
 
 	/* can we conclude ENOENT locally? */
