Since filenames in encrypted directories are already encrypted and shown
as a base64-encoded string when the directory is locked, snapshot names
should show a similar behaviour.
Signed-off-by: Luís Henriques <lhenriques@xxxxxxx>
---
fs/ceph/dir.c | 9 +++++++++
fs/ceph/inode.c | 13 +++++++++++++
2 files changed, 22 insertions(+)
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 934402f5e9e6..17d2f18a1fd1 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -1069,6 +1069,15 @@ static int ceph_mkdir(struct user_namespace *mnt_userns, struct inode *dir,
op = CEPH_MDS_OP_MKSNAP;
dout("mksnap dir %p snap '%pd' dn %p\n", dir,
dentry, dentry);
+ /*
+ * Encrypted snapshots require d_revalidate to force a
+ * LOOKUPSNAP to cleanup dcache
+ */
+ if (IS_ENCRYPTED(dir)) {
+ spin_lock(&dentry->d_lock);
+ dentry->d_flags |= DCACHE_NOKEY_NAME;
+ spin_unlock(&dentry->d_lock);
+ }
} else if (ceph_snap(dir) == CEPH_NOSNAP) {
dout("mkdir dir %p dn %p mode 0%ho\n", dir, dentry, mode);
op = CEPH_MDS_OP_MKDIR;
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 8b0832271fdf..357335a11384 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -182,6 +182,19 @@ struct inode *ceph_get_snapdir(struct inode *parent)
ci->i_rbytes = 0;
ci->i_btime = ceph_inode(parent)->i_btime;
+ /* if encrypted, just borrow fscrypt_auth from parent */
+ if (IS_ENCRYPTED(parent)) {
+ struct ceph_inode_info *pci = ceph_inode(parent);
+
+ ci->fscrypt_auth = kmemdup(pci->fscrypt_auth,
+ pci->fscrypt_auth_len,
+ GFP_KERNEL);
+ if (ci->fscrypt_auth) {
+ inode->i_flags |= S_ENCRYPTED;
+ ci->fscrypt_auth_len = pci->fscrypt_auth_len;
+ } else
+ dout("Failed to alloc memory for fscrypt_auth in snapdir\n");
+ }
if (inode->i_state & I_NEW) {
inode->i_op = &ceph_snapdir_iops;
inode->i_fop = &ceph_snapdir_fops;
