fs/nfsd/netns.h

   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
  37 struct cld_net;
  38
  39 struct nfsd_net {
  40         struct cld_net *cld_net;
  41
  42         struct cache_detail *svc_expkey_cache;
  43         struct cache_detail *svc_export_cache;
  44
  45         struct cache_detail *idtoname_cache;
  46         struct cache_detail *nametoid_cache;
  47
  48         struct lock_manager nfsd4_manager;
  49         bool grace_ended;
  50         time_t boot_time;
  51
  52         /*
  53          * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
  54          * used in reboot/reset lease grace period processing
  55          *
  56          * conf_id_hashtbl[], and conf_name_tree hold confirmed
  57          * setclientid_confirmed info.
  58          *
  59          * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
  60          * setclientid info.
  61          */
  62         struct list_head *reclaim_str_hashtbl;
  63         int reclaim_str_hashtbl_size;
  64         struct list_head *conf_id_hashtbl;
  65         struct rb_root conf_name_tree;
  66         struct list_head *unconf_id_hashtbl;
  67         struct rb_root unconf_name_tree;
  68         struct list_head *ownerstr_hashtbl;
  69         struct list_head *lockowner_ino_hashtbl;
  70         struct list_head *sessionid_hashtbl;
  71         /*
  72          * client_lru holds client queue ordered by nfs4_client.cl_time
  73          * for lease renewal.
  74          *
  75          * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
  76          * for last close replay.
  77          *
  78          * All of the above fields are protected by the client_mutex.
  79          */
  80         struct list_head client_lru;
  81         struct list_head close_lru;
  82
  83         struct delayed_work laundromat_work;
  84
  85         /* client_lock protects the client lru list and session hash table */
  86         spinlock_t client_lock;
  87
  88         struct file *rec_file;
  89         bool in_grace;
  90
  91         time_t nfsd4_lease;
  92         time_t nfsd4_grace;
  93 };
  94
  95 /* Simple check to find out if a given net was properly initialized */
  96 #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
  97
  98 extern int nfsd_net_id;
  99 #endif /* __NFSD_NETNS_H__ */