/*
   * per net namespace data structures for nfsd
   *
   * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
   *
   * This program is free software; you can redistribute it and/or modify it
   * under the terms of the GNU General Public License as published by the Free
   * Software Foundation; either version 2 of the License, or (at your option)
   * any later version.
   *
   * This program is distributed in the hope that it will be useful, but WITHOUT
   * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
   * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
   * more details.
   *
   * You should have received a copy of the GNU General Public License along with
   * this program; if not, write to the Free Software Foundation, Inc., 51
   * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   */
  
  #ifndef __NFSD_NETNS_H__
  #define __NFSD_NETNS_H__
  
  #include <net/net_namespace.h>
  #include <net/netns/generic.h>
  
  /* Hash tables for nfs4_clientid state */
  #define CLIENT_HASH_BITS                 4
  #define CLIENT_HASH_SIZE                (1 << CLIENT_HASH_BITS)
  #define CLIENT_HASH_MASK                (CLIENT_HASH_SIZE - 1)
  
  #define SESSION_HASH_SIZE	512
  
  struct cld_net;
  struct nfsd4_client_tracking_ops;
  
  /*
   * Represents a nfsd "container". With respect to nfsv4 state tracking, the
   * fields of interest are the *_id_hashtbls and the *_name_tree. These track
   * the nfs4_client objects by either short or long form clientid.
   *
   * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean
   * up expired clients and delegations within the container.
   */
  struct nfsd_net {
  	struct cld_net *cld_net;
  
  	struct cache_detail *svc_expkey_cache;
  	struct cache_detail *svc_export_cache;
  
  	struct cache_detail *idtoname_cache;
  	struct cache_detail *nametoid_cache;
  
  	struct lock_manager nfsd4_manager;
  	bool grace_ended;
  	time_t boot_time;
  
  	/*
  	 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
  	 * used in reboot/reset lease grace period processing
  	 *
  	 * conf_id_hashtbl[], and conf_name_tree hold confirmed
  	 * setclientid_confirmed info.
  	 *
  	 * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
  	 * setclientid info.
  	 */
  	struct list_head *reclaim_str_hashtbl;
  	int reclaim_str_hashtbl_size;
  	struct list_head *conf_id_hashtbl;
  	struct rb_root conf_name_tree;
  	struct list_head *unconf_id_hashtbl;
  	struct rb_root unconf_name_tree;
  	struct list_head *sessionid_hashtbl;
  	/*
  	 * client_lru holds client queue ordered by nfs4_client.cl_time
  	 * for lease renewal.
  	 *
  	 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
  	 * for last close replay.
  	 *
  	 * All of the above fields are protected by the client_mutex.
  	 */
  	struct list_head client_lru;
  	struct list_head close_lru;
  	struct list_head del_recall_lru;
  
  	/* protected by blocked_locks_lock */
  	struct list_head blocked_locks_lru;
  
  	struct delayed_work laundromat_work;
  
  	/* client_lock protects the client lru list and session hash table */
  	spinlock_t client_lock;
  
  	/* protects blocked_locks_lru */
  	spinlock_t blocked_locks_lock;
  
  	struct file *rec_file;
  	bool in_grace;
  	const struct nfsd4_client_tracking_ops *client_tracking_ops;
  
  	time_t nfsd4_lease;
  	time_t nfsd4_grace;
  
  	bool nfsd_net_up;
  	bool lockd_up;
  
  	/* Time of server startup */
  	struct timeval nfssvc_boot;
  
  	/*
  	 * Max number of connections this nfsd container will allow. Defaults
  	 * to '0' which is means that it bases this on the number of threads.
  	 */
  	unsigned int max_connections;
  
  	u32 clientid_counter;
  	u32 clverifier_counter;
  
  	struct svc_serv *nfsd_serv;
  };
  
  /* Simple check to find out if a given net was properly initialized */
  #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
  
  extern unsigned int nfsd_net_id;
  #endif /* __NFSD_NETNS_H__ */