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From:   Jeff Layton <jlayton@kernel.org>
To:     idryomov@gmail.com, xiubli@redhat.com
Cc:     ceph-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
        linux-fscrypt@vger.kernel.org, linux-kernel@vger.kernel.org,
        lhenriques@suse.de
Subject: [RFC PATCH v11 18/51] ceph: properly set DCACHE_NOKEY_NAME flag in lookup
Date:   Tue, 22 Mar 2022 10:12:43 -0400
Message-Id: <20220322141316.41325-19-jlayton@kernel.org>
In-Reply-To: <20220322141316.41325-1-jlayton@kernel.org>
References: <20220322141316.41325-1-jlayton@kernel.org>
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This is required so that we know to invalidate these dentries when the
directory is unlocked.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/dir.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 8cc7a49ee508..897f8618151b 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -760,6 +760,17 @@ static struct dentry *ceph_lookup(struct inode *dir, struct dentry *dentry,
 	if (dentry->d_name.len > NAME_MAX)
 		return ERR_PTR(-ENAMETOOLONG);
 
+	if (IS_ENCRYPTED(dir)) {
+		err = __fscrypt_prepare_readdir(dir);
+		if (err)
+			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);
+		}
+	}
+
 	/* can we conclude ENOENT locally? */
 	if (d_really_is_negative(dentry)) {
 		struct ceph_inode_info *ci = ceph_inode(dir);
-- 
2.35.1