#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;	xi->built_authorizer = false;} 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;} /* * 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, int result,			void *buf, void *end){	struct ceph_auth_none_info *xi = ac->private; 	xi->starting = false;	return result;} /* * build an 'authorizer' with our entity_name and global_id.  we can * reuse a single static copy since 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_auth_none_info *ai = ac->private;	struct ceph_none_authorizer *au = &ai->au;	void *p, *end;	int ret; 	if (!ai->built_authorizer) {		p = au->buf;		end = p + sizeof(au->buf);		ceph_encode_8(&p, 1);		ret = ceph_entity_name_encode(ac->name, &p, end - 8);		if (ret < 0)			goto bad;		ceph_decode_need(&p, end, sizeof(u64), bad2);		ceph_encode_64(&p, ac->global_id);		au->buf_len = p - (void *)au->buf;		ai->built_authorizer = true;		dout("built authorizer len %d\n", au->buf_len);	} 	auth->authorizer = (struct ceph_authorizer *) au;	auth->authorizer_buf = au->buf;	auth->authorizer_buf_len = au->buf_len;	auth->authorizer_reply_buf = au->reply_buf;	auth->authorizer_reply_buf_len = sizeof (au->reply_buf); 	return 0; bad2:	ret = -ERANGE;bad:	return ret;} static void ceph_auth_none_destroy_authorizer(struct ceph_auth_client *ac,				      struct ceph_authorizer *a){	/* nothing to do */} static const struct ceph_auth_client_ops ceph_auth_none_ops = {	.name = "none",	.reset = reset,	.destroy = destroy,	.is_authenticated = is_authenticated,	.should_authenticate = should_authenticate,	.handle_reply = handle_reply,	.create_authorizer = ceph_auth_none_create_authorizer,	.destroy_authorizer = ceph_auth_none_destroy_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(sizeof(*xi), GFP_NOFS);	if (!xi)		return -ENOMEM; 	xi->starting = true;	xi->built_authorizer = false; 	ac->protocol = CEPH_AUTH_NONE;	ac->private = xi;	ac->ops = &ceph_auth_none_ops;	return 0;}