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 struct dentry *nfsd_client_dir; 46 47 /* 48 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot 49 * used in reboot/reset lease grace period processing 50 * 51 * conf_id_hashtbl[], and conf_name_tree hold confirmed 52 * setclientid_confirmed info. 53 * 54 * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed 55 * setclientid info. 56 */ 57 struct list_head *reclaim_str_hashtbl; 58 int reclaim_str_hashtbl_size; 59 struct list_head *conf_id_hashtbl; 60 struct rb_root conf_name_tree; 61 struct list_head *unconf_id_hashtbl; 62 struct rb_root unconf_name_tree; 63 struct list_head *sessionid_hashtbl; 64 /* 65 * client_lru holds client queue ordered by nfs4_client.cl_time 66 * for lease renewal. 67 * 68 * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time 69 * for last close replay. 70 * 71 * All of the above fields are protected by the client_mutex. 72 */ 73 struct list_head client_lru; 74 struct list_head close_lru; 75 struct list_head del_recall_lru; 76 77 /* protected by blocked_locks_lock */ 78 struct list_head blocked_locks_lru; 79 80 struct delayed_work laundromat_work; 81 82 /* client_lock protects the client lru list and session hash table */ 83 spinlock_t client_lock; 84 85 /* protects blocked_locks_lru */ 86 spinlock_t blocked_locks_lock; 87 88 struct file *rec_file; 89 bool in_grace; 90 const struct nfsd4_client_tracking_ops *client_tracking_ops; 91 92 time_t nfsd4_lease; 93 time_t nfsd4_grace; 94 bool somebody_reclaimed; 95 96 bool track_reclaim_completes; 97 atomic_t nr_reclaim_complete; 98 99 bool nfsd_net_up; 100 bool lockd_up; 101 102 /* Time of server startup */ 103 struct timespec64 nfssvc_boot; 104 seqlock_t boot_lock; 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_base; 113 u32 clientid_counter; 114 u32 clverifier_counter; 115 116 struct svc_serv *nfsd_serv; 117 118 wait_queue_head_t ntf_wq; 119 atomic_t ntf_refcnt; 120 121 /* Allow umount to wait for nfsd state cleanup */ 122 struct completion nfsd_shutdown_complete; 123 124 /* 125 * clientid and stateid data for construction of net unique COPY 126 * stateids. 127 */ 128 u32 s2s_cp_cl_id; 129 struct idr s2s_cp_stateids; 130 spinlock_t s2s_cp_lock; 131 132 /* 133 * Version information 134 */ 135 bool *nfsd_versions; 136 bool *nfsd4_minorversions; 137 138 /* 139 * Duplicate reply cache 140 */ 141 struct nfsd_drc_bucket *drc_hashtbl; 142 143 /* max number of entries allowed in the cache */ 144 unsigned int max_drc_entries; 145 146 /* number of significant bits in the hash value */ 147 unsigned int maskbits; 148 unsigned int drc_hashsize; 149 150 /* 151 * Stats and other tracking of on the duplicate reply cache. 152 * These fields and the "rc" fields in nfsdstats are modified 153 * with only the per-bucket cache lock, which isn't really safe 154 * and should be fixed if we want the statistics to be 155 * completely accurate. 156 */ 157 158 /* total number of entries */ 159 atomic_t num_drc_entries; 160 161 /* cache misses due only to checksum comparison failures */ 162 unsigned int payload_misses; 163 164 /* amount of memory (in bytes) currently consumed by the DRC */ 165 unsigned int drc_mem_usage; 166 167 /* longest hash chain seen */ 168 unsigned int longest_chain; 169 170 /* size of cache when we saw the longest hash chain */ 171 unsigned int longest_chain_cachesize; 172 173 struct shrinker nfsd_reply_cache_shrinker; 174 }; 175 176 /* Simple check to find out if a given net was properly initialized */ 177 #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) 178 179 extern void nfsd_netns_free_versions(struct nfsd_net *nn); 180 181 extern unsigned int nfsd_net_id; 182 183 void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn); 184 void nfsd_reset_boot_verifier(struct nfsd_net *nn); 185 #endif /* __NFSD_NETNS_H__ */ 186