// SPDX-License-Identifier: GPL-2.0 #include <linux/ceph/ceph_debug.h> #include <linux/err.h>#include <linux/module.h>#include <linux/random.h>#include <linux/slab.h> #include <linux/ceph/decode.h>#include <linux/ceph/auth.h> #include "auth_none.h" static void reset(struct ceph_auth_client *ac){	struct ceph_auth_none_info *xi = ac->private; 	xi->starting = true;} static void destroy(struct ceph_auth_client *ac){	kfree(ac->private);	ac->private = NULL;} static int is_authenticated(struct ceph_auth_client *ac){	struct ceph_auth_none_info *xi = ac->private; 	return !xi->starting;} static int should_authenticate(struct ceph_auth_client *ac){	struct ceph_auth_none_info *xi = ac->private; 	return xi->starting;} static int ceph_auth_none_build_authorizer(struct ceph_auth_client *ac,					   struct ceph_none_authorizer *au){	void *p = au->buf;	void *const end = p + sizeof(au->buf);	int ret; 	ceph_encode_8_safe(&p, end, 1, e_range);	ret = ceph_auth_entity_name_encode(ac->name, &p, end);	if (ret < 0)		return ret; 	ceph_encode_64_safe(&p, end, ac->global_id, e_range);	au->buf_len = p - (void *)au->buf;	dout("%s built authorizer len %d\n", __func__, au->buf_len);	return 0; e_range:	return -ERANGE;} static int build_request(struct ceph_auth_client *ac, void *buf, void *end){	return 0;} /* * the generic auth code decode the global_id, and we carry no actual * authenticate state, so nothing happens here. */static int handle_reply(struct ceph_auth_client *ac, u64 global_id,			void *buf, void *end, u8 *session_key,			int *session_key_len, u8 *con_secret,			int *con_secret_len){	struct ceph_auth_none_info *xi = ac->private; 	xi->starting = false;	ceph_auth_set_global_id(ac, global_id);	return 0;} static void ceph_auth_none_destroy_authorizer(struct ceph_authorizer *a){	kfree(a);} /* * build an 'authorizer' with our entity_name and global_id.  it is * identical for all services we connect to. */static int ceph_auth_none_create_authorizer(	struct ceph_auth_client *ac, int peer_type,	struct ceph_auth_handshake *auth){	struct ceph_none_authorizer *au;	int ret; 	au = kmalloc_obj(*au, GFP_NOFS);	if (!au)		return -ENOMEM; 	au->base.destroy = ceph_auth_none_destroy_authorizer; 	ret = ceph_auth_none_build_authorizer(ac, au);	if (ret) {		kfree(au);		return ret;	} 	auth->authorizer = (struct ceph_authorizer *) au;	auth->authorizer_buf = au->buf;	auth->authorizer_buf_len = au->buf_len;	auth->authorizer_reply_buf = NULL;	auth->authorizer_reply_buf_len = 0; 	return 0;} static const struct ceph_auth_client_ops ceph_auth_none_ops = {	.reset = reset,	.destroy = destroy,	.is_authenticated = is_authenticated,	.should_authenticate = should_authenticate,	.build_request = build_request,	.handle_reply = handle_reply,	.create_authorizer = ceph_auth_none_create_authorizer,}; int ceph_auth_none_init(struct ceph_auth_client *ac){	struct ceph_auth_none_info *xi; 	dout("ceph_auth_none_init %p\n", ac);	xi = kzalloc_obj(*xi, GFP_NOFS);	if (!xi)		return -ENOMEM; 	xi->starting = true; 	ac->protocol = CEPH_AUTH_NONE;	ac->private = xi;	ac->ops = &ceph_auth_none_ops;	return 0;}