1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * per net namespace data structures for nfsd 4 * 5 * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com> 6 */ 7 8 #ifndef __NFSD_NETNS_H__ 9 #define __NFSD_NETNS_H__ 10 11 #include <net/net_namespace.h> 12 #include <net/netns/generic.h> 13 14 /* Hash tables for nfs4_clientid state */ 15 #define CLIENT_HASH_BITS 4 16 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) 17 #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) 18 19 #define SESSION_HASH_SIZE 512 20 21 struct cld_net; 22 struct nfsd4_client_tracking_ops; 23 24 /* 25 * Represents a nfsd "container". With respect to nfsv4 state tracking, the 26 * fields of interest are the *_id_hashtbls and the *_name_tree. These track 27 * the nfs4_client objects by either short or long form clientid. 28 * 29 * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean 30 * up expired clients and delegations within the container. 31 */ 32 struct nfsd_net { 33 struct cld_net *cld_net; 34 35 struct cache_detail *svc_expkey_cache; 36 struct cache_detail *svc_export_cache; 37 38 struct cache_detail *idtoname_cache; 39 struct cache_detail *nametoid_cache; 40 41 struct lock_manager nfsd4_manager; 42 bool grace_ended; 43 time_t boot_time; 44 45 /* 46 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 47 * used in reboot/reset lease grace period processing 48 * 49 * conf_id_hashtbl[], and conf_name_tree hold confirmed 50 * setclientid_confirmed info. 51 * 52 * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed 53 * setclientid info. 54 */ 55 struct list_head *reclaim_str_hashtbl; 56 int reclaim_str_hashtbl_size; 57 struct list_head *conf_id_hashtbl; 58 struct rb_root conf_name_tree; 59 struct list_head *unconf_id_hashtbl; 60 struct rb_root unconf_name_tree; 61 struct list_head *sessionid_hashtbl; 62 /* 63 * client_lru holds client queue ordered by nfs4_client.cl_time 64 * for lease renewal. 65 * 66 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 67 * for last close replay. 68 * 69 * All of the above fields are protected by the client_mutex. 70 */ 71 struct list_head client_lru; 72 struct list_head close_lru; 73 struct list_head del_recall_lru; 74 75 /* protected by blocked_locks_lock */ 76 struct list_head blocked_locks_lru; 77 78 struct delayed_work laundromat_work; 79 80 /* client_lock protects the client lru list and session hash table */ 81 spinlock_t client_lock; 82 83 /* protects blocked_locks_lru */ 84 spinlock_t blocked_locks_lock; 85 86 struct file *rec_file; 87 bool in_grace; 88 const struct nfsd4_client_tracking_ops *client_tracking_ops; 89 90 time_t nfsd4_lease; 91 time_t nfsd4_grace; 92 bool somebody_reclaimed; 93 94 bool track_reclaim_completes; 95 atomic_t nr_reclaim_complete; 96 97 bool nfsd_net_up; 98 bool lockd_up; 99 100 /* Time of server startup */ 101 struct timespec64 nfssvc_boot; 102 103 /* 104 * Max number of connections this nfsd container will allow. Defaults 105 * to '0' which is means that it bases this on the number of threads. 106 */ 107 unsigned int max_connections; 108 109 u32 clientid_counter; 110 u32 clverifier_counter; 111 112 struct svc_serv *nfsd_serv; 113 114 wait_queue_head_t ntf_wq; 115 atomic_t ntf_refcnt; 116 117 /* 118 * clientid and stateid data for construction of net unique COPY 119 * stateids. 120 */ 121 u32 s2s_cp_cl_id; 122 struct idr s2s_cp_stateids; 123 spinlock_t s2s_cp_lock; 124 125 /* 126 * Version information 127 */ 128 bool *nfsd_versions; 129 bool *nfsd4_minorversions; 130 }; 131 132 /* Simple check to find out if a given net was properly initialized */ 133 #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) 134 135 extern void nfsd_netns_free_versions(struct nfsd_net *nn); 136 137 extern unsigned int nfsd_net_id; 138 #endif /* __NFSD_NETNS_H__ */ 139