diff mbox series

[v14,64/64] ceph: prevent snapshots to be created in encrypted locked directories

Message ID 20220427191314.222867-65-jlayton@kernel.org
State Superseded
Headers show
Series [v14,01/64] libceph: add spinlock around osd->o_requests | expand

Commit Message

Jeff Layton April 27, 2022, 7:13 p.m. UTC 
From: Luís Henriques <lhenriques@suse.de>

With snapshot names encryption we can not allow snapshots to be created in
locked directories because the names wouldn't be encrypted.  This patch
forces the directory to be unlocked to allow a snapshot to be created.

Signed-off-by: Luís Henriques <lhenriques@suse.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
---
 fs/ceph/dir.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 544aa5e78a31..7045f0aa53cc 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1071,6 +1071,11 @@  static int ceph_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
 		err = -EDQUOT;
 		goto out;
 	}
+	if ((op == CEPH_MDS_OP_MKSNAP) && IS_ENCRYPTED(dir) &&
+	    !fscrypt_has_encryption_key(dir)) {
+		err = -ENOKEY;
+		goto out;
+	}
 
 
 	req = ceph_mdsc_create_request(mdsc, op, USE_AUTH_MDS);