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[RFC,v6,13/20] ceph: properly set DCACHE_NOKEY_NAME flag in lookup

Message ID 20210413175052.163865-14-jlayton@kernel.org (mailing list archive)
State New
Headers show
Series ceph+fscrypt: context, filename and symlink support | expand

Commit Message

Jeff Layton April 13, 2021, 5:50 p.m. UTC
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(+)
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Patch

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 496d24b003dd..72728850e96c 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -755,6 +755,17 @@  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);