#ifndef _FS_CEPH_AUTH_H#define _FS_CEPH_AUTH_H #include <linux/ceph/types.h>#include <linux/ceph/buffer.h> /* * Abstract interface for communicating with the authenticate module. * There is some handshake that takes place between us and the monitor * to acquire the necessary keys.  These are used to generate an * 'authorizer' that we use when connecting to a service (mds, osd). */ struct ceph_auth_client;struct ceph_authorizer; struct ceph_auth_client_ops {	const char *name; 	/*	 * true if we are authenticated and can connect to	 * services.	 */	int (*is_authenticated)(struct ceph_auth_client *ac); 	/*	 * true if we should (re)authenticate, e.g., when our tickets	 * are getting old and crusty.	 */	int (*should_authenticate)(struct ceph_auth_client *ac); 	/*	 * build requests and process replies during monitor	 * handshake.  if handle_reply returns -EAGAIN, we build	 * another request.	 */	int (*build_request)(struct ceph_auth_client *ac, void *buf, void *end);	int (*handle_reply)(struct ceph_auth_client *ac, int result,			    void *buf, void *end); 	/*	 * Create authorizer for connecting to a service, and verify	 * the response to authenticate the service.	 */	int (*create_authorizer)(struct ceph_auth_client *ac, int peer_type,				 struct ceph_authorizer **a,				 void **buf, size_t *len,				 void **reply_buf, size_t *reply_len);	int (*verify_authorizer_reply)(struct ceph_auth_client *ac,				       struct ceph_authorizer *a, size_t len);	void (*destroy_authorizer)(struct ceph_auth_client *ac,				   struct ceph_authorizer *a);	void (*invalidate_authorizer)(struct ceph_auth_client *ac,				      int peer_type); 	/* reset when we (re)connect to a monitor */	void (*reset)(struct ceph_auth_client *ac); 	void (*destroy)(struct ceph_auth_client *ac);}; struct ceph_auth_client {	u32 protocol;           /* CEPH_AUTH_* */	void *private;          /* for use by protocol implementation */	const struct ceph_auth_client_ops *ops;  /* null iff protocol==0 */ 	bool negotiating;       /* true if negotiating protocol */	const char *name;       /* entity name */	u64 global_id;          /* our unique id in system */	const char *secret;     /* our secret key */	unsigned want_keys;     /* which services we want */}; extern struct ceph_auth_client *ceph_auth_init(const char *name,					       const char *secret);extern void ceph_auth_destroy(struct ceph_auth_client *ac); extern void ceph_auth_reset(struct ceph_auth_client *ac); extern int ceph_auth_build_hello(struct ceph_auth_client *ac,				 void *buf, size_t len);extern int ceph_handle_auth_reply(struct ceph_auth_client *ac,				  void *buf, size_t len,				  void *reply_buf, size_t reply_len);extern int ceph_entity_name_encode(const char *name, void **p, void *end); extern int ceph_build_auth(struct ceph_auth_client *ac,		    void *msg_buf, size_t msg_len); extern int ceph_auth_is_authenticated(struct ceph_auth_client *ac); #endif