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/* SPDX-License-Identifier: GPL-2.0 */
/*
* Ceph fscrypt functionality
*/
#ifndef _CEPH_CRYPTO_H
#define _CEPH_CRYPTO_H
#include <linux/fscrypt.h>
struct ceph_fs_client;
struct ceph_acl_sec_ctx;
struct ceph_mds_request;
struct ceph_fscrypt_auth {
__le32 cfa_version;
__le32 cfa_blob_len;
u8 cfa_blob[FSCRYPT_SET_CONTEXT_MAX_SIZE];
} __packed;
#define CEPH_FSCRYPT_AUTH_VERSION 1
static inline u32 ceph_fscrypt_auth_len(struct ceph_fscrypt_auth *fa)
{
u32 ctxsize = le32_to_cpu(fa->cfa_blob_len);
return offsetof(struct ceph_fscrypt_auth, cfa_blob) + ctxsize;
}
#ifdef CONFIG_FS_ENCRYPTION
void ceph_fscrypt_set_ops(struct super_block *sb);
void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc);
int ceph_fscrypt_prepare_context(struct inode *dir, struct inode *inode,
struct ceph_acl_sec_ctx *as);
void ceph_fscrypt_as_ctx_to_req(struct ceph_mds_request *req,
struct ceph_acl_sec_ctx *as);
#else /* CONFIG_FS_ENCRYPTION */
static inline void ceph_fscrypt_set_ops(struct super_block *sb)
{
}
static inline void ceph_fscrypt_free_dummy_policy(struct ceph_fs_client *fsc)
{
}
static inline int ceph_fscrypt_prepare_context(struct inode *dir,
struct inode *inode,
struct ceph_acl_sec_ctx *as)
{
if (IS_ENCRYPTED(dir))
return -EOPNOTSUPP;
return 0;
}
static inline void ceph_fscrypt_as_ctx_to_req(struct ceph_mds_request *req,
struct ceph_acl_sec_ctx *as_ctx)
{
}
#endif /* CONFIG_FS_ENCRYPTION */
#endif
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