#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_authorizer **a,
  	void **buf, size_t *len,
  	void **reply_buf, size_t *reply_len)
  {
  	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
  ", au->buf_len);
  	}
  
  	*a = (struct ceph_authorizer *)au;
  	*buf = au->buf;
  	*len = au->buf_len;
  	*reply_buf = au->reply_buf;
  	*reply_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
  ", 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;
  }