From: Luís Henriques <lhenriques@suse.de>
Date: Tue, 17 Aug 2021 14:04:39 +0000 (+0100)
Subject: ceph: don't allow changing layout on encrypted files/directories
X-Git-Url: http://git-server-git.apps.pok.os.sepia.ceph.com/?a=commitdiff_plain;h=a41d4149f8e3693fdd2ea85b34eb9332a03ba1e8;p=ceph-client.git

ceph: don't allow changing layout on encrypted files/directories

Encryption is currently only supported on files/directories with layouts
where stripe_count=1.  Forbid changing layouts when encryption is involved.

Signed-off-by: Luis Henriques <lhenriques@suse.de>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---

diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index b9f0f4e460ab..9675ef3a6c47 100644
--- a/fs/ceph/ioctl.c
+++ b/fs/ceph/ioctl.c
@@ -294,6 +294,10 @@ static long ceph_set_encryption_policy(struct file *file, unsigned long arg)
 	struct inode *inode = file_inode(file);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 
+	/* encrypted directories can't have striped layout */
+	if (ci->i_layout.stripe_count > 1)
+		return -EINVAL;
+
 	ret = vet_mds_for_fscrypt(file);
 	if (ret)
 		return ret;