diff mbox series

[v20,38/71] ceph: don't allow changing layout on encrypted files/directories

Message ID 20230613052424.254540-39-xiubli@redhat.com
State New
Headers show
Series ceph+fscrypt: full support | expand

Commit Message

Xiubo Li June 13, 2023, 5:23 a.m. UTC 
From: Luís Henriques <lhenriques@suse.de>

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

Tested-by: Luís Henriques <lhenriques@suse.de>
Tested-by: Venky Shankar <vshankar@redhat.com>
Signed-off-by: Luis Henriques <lhenriques@suse.de>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/ioctl.c | 4 ++++
 1 file changed, 4 insertions(+)
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Patch

diff --git a/fs/ceph/ioctl.c b/fs/ceph/ioctl.c
index 7f0e181d4329..679402bd80ba 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;