ceph: make d_revalidate call fscrypt revalidator for encrypted dentries

If we have a dentry which represents a no-key name, then we need to test
whether the parent directory's encryption key has since been added.  Do
that before we test anything else about the dentry.

Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-and-tested-by: Luís Henriques <lhenriques@suse.de>
Reviewed-by: Milind Changire <mchangir@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index cd2ca26..9a03426 100644 (file)
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1782,6 +1782,10 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
        struct inode *dir, *inode;
        struct ceph_mds_client *mdsc;
 
+       valid = fscrypt_d_revalidate(dentry, flags);
+       if (valid <= 0)
+               return valid;
+
        if (flags & LOOKUP_RCU) {
                parent = READ_ONCE(dentry->d_parent);
                dir = d_inode_rcu(parent);
@@ -1794,8 +1798,9 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
                inode = d_inode(dentry);
        }
 
-       dout("d_revalidate %p '%pd' inode %p offset 0x%llx\n", dentry,
-            dentry, inode, ceph_dentry(dentry)->offset);
+       dout("d_revalidate %p '%pd' inode %p offset 0x%llx nokey %d\n", dentry,
+            dentry, inode, ceph_dentry(dentry)->offset,
+            !!(dentry->d_flags & DCACHE_NOKEY_NAME));
 
        mdsc = ceph_sb_to_client(dir->i_sb)->mdsc;