linux/fs/nfsd/netns.h
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   1/*
   2 * per net namespace data structures for nfsd
   3 *
   4 * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
   5 *
   6 * This program is free software; you can redistribute it and/or modify it
   7 * under the terms of the GNU General Public License as published by the Free
   8 * Software Foundation; either version 2 of the License, or (at your option)
   9 * any later version.
  10 *
  11 * This program is distributed in the hope that it will be useful, but WITHOUT
  12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14 * more details.
  15 *
  16 * You should have received a copy of the GNU General Public License along with
  17 * this program; if not, write to the Free Software Foundation, Inc., 51
  18 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  19 */
  20
  21#ifndef __NFSD_NETNS_H__
  22#define __NFSD_NETNS_H__
  23
  24#include <net/net_namespace.h>
  25#include <net/netns/generic.h>
  26
  27/* Hash tables for nfs4_clientid state */
  28#define CLIENT_HASH_BITS                 4
  29#define CLIENT_HASH_SIZE                (1 << CLIENT_HASH_BITS)
  30#define CLIENT_HASH_MASK                (CLIENT_HASH_SIZE - 1)
  31
  32#define LOCKOWNER_INO_HASH_BITS         8
  33#define LOCKOWNER_INO_HASH_SIZE         (1 << LOCKOWNER_INO_HASH_BITS)
  34
  35#define SESSION_HASH_SIZE       512
  36
  37struct cld_net;
  38struct nfsd4_client_tracking_ops;
  39
  40struct nfsd_net {
  41        struct cld_net *cld_net;
  42
  43        struct cache_detail *svc_expkey_cache;
  44        struct cache_detail *svc_export_cache;
  45
  46        struct cache_detail *idtoname_cache;
  47        struct cache_detail *nametoid_cache;
  48
  49        struct lock_manager nfsd4_manager;
  50        bool grace_ended;
  51        time_t boot_time;
  52
  53        /*
  54         * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
  55         * used in reboot/reset lease grace period processing
  56         *
  57         * conf_id_hashtbl[], and conf_name_tree hold confirmed
  58         * setclientid_confirmed info.
  59         *
  60         * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
  61         * setclientid info.
  62         */
  63        struct list_head *reclaim_str_hashtbl;
  64        int reclaim_str_hashtbl_size;
  65        struct list_head *conf_id_hashtbl;
  66        struct rb_root conf_name_tree;
  67        struct list_head *unconf_id_hashtbl;
  68        struct rb_root unconf_name_tree;
  69        struct list_head *ownerstr_hashtbl;
  70        struct list_head *lockowner_ino_hashtbl;
  71        struct list_head *sessionid_hashtbl;
  72        /*
  73         * client_lru holds client queue ordered by nfs4_client.cl_time
  74         * for lease renewal.
  75         *
  76         * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
  77         * for last close replay.
  78         *
  79         * All of the above fields are protected by the client_mutex.
  80         */
  81        struct list_head client_lru;
  82        struct list_head close_lru;
  83        struct list_head del_recall_lru;
  84
  85        struct delayed_work laundromat_work;
  86
  87        /* client_lock protects the client lru list and session hash table */
  88        spinlock_t client_lock;
  89
  90        struct file *rec_file;
  91        bool in_grace;
  92        struct nfsd4_client_tracking_ops *client_tracking_ops;
  93
  94        time_t nfsd4_lease;
  95        time_t nfsd4_grace;
  96
  97        bool nfsd_net_up;
  98
  99        /*
 100         * Time of server startup
 101         */
 102        struct timeval nfssvc_boot;
 103
 104        struct svc_serv *nfsd_serv;
 105};
 106
 107/* Simple check to find out if a given net was properly initialized */
 108#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
 109
 110extern int nfsd_net_id;
 111#endif /* __NFSD_NETNS_H__ */
 112
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