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 SESSION_HASH_SIZE 512 33 34 struct cld_net; 35 struct nfsd4_client_tracking_ops; 36 37 /* 38 * Represents a nfsd "container". With respect to nfsv4 state tracking, the 39 * fields of interest are the *_id_hashtbls and the *_name_tree. These track 40 * the nfs4_client objects by either short or long form clientid. 41 * 42 * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean 43 * up expired clients and delegations within the container. 44 */ 45 struct nfsd_net { 46 struct cld_net *cld_net; 47 48 struct cache_detail *svc_expkey_cache; 49 struct cache_detail *svc_export_cache; 50 51 struct cache_detail *idtoname_cache; 52 struct cache_detail *nametoid_cache; 53 54 struct lock_manager nfsd4_manager; 55 bool grace_ended; 56 time_t boot_time; 57 58 /* 59 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 60 * used in reboot/reset lease grace period processing 61 * 62 * conf_id_hashtbl[], and conf_name_tree hold confirmed 63 * setclientid_confirmed info. 64 * 65 * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed 66 * setclientid info. 67 */ 68 struct list_head *reclaim_str_hashtbl; 69 int reclaim_str_hashtbl_size; 70 struct list_head *conf_id_hashtbl; 71 struct rb_root conf_name_tree; 72 struct list_head *unconf_id_hashtbl; 73 struct rb_root unconf_name_tree; 74 struct list_head *sessionid_hashtbl; 75 /* 76 * client_lru holds client queue ordered by nfs4_client.cl_time 77 * for lease renewal. 78 * 79 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 80 * for last close replay. 81 * 82 * All of the above fields are protected by the client_mutex. 83 */ 84 struct list_head client_lru; 85 struct list_head close_lru; 86 struct list_head del_recall_lru; 87 88 struct delayed_work laundromat_work; 89 90 /* client_lock protects the client lru list and session hash table */ 91 spinlock_t client_lock; 92 93 struct file *rec_file; 94 bool in_grace; 95 const struct nfsd4_client_tracking_ops *client_tracking_ops; 96 97 time_t nfsd4_lease; 98 time_t nfsd4_grace; 99 100 bool nfsd_net_up; 101 bool lockd_up; 102 103 /* Time of server startup */ 104 struct timeval nfssvc_boot; 105 106 /* 107 * Max number of connections this nfsd container will allow. Defaults 108 * to '0' which is means that it bases this on the number of threads. 109 */ 110 unsigned int max_connections; 111 112 u32 clientid_counter; 113 u32 clverifier_counter; 114 115 struct svc_serv *nfsd_serv; 116 }; 117 118 /* Simple check to find out if a given net was properly initialized */ 119 #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) 120 121 extern int nfsd_net_id; 122 #endif /* __NFSD_NETNS_H__ */ 123