/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * per net namespace data structures for nfsd * * Copyright (C) 2012, Jeff Layton */ #ifndef __NFSD_NETNS_H__ #define __NFSD_NETNS_H__ #include #include #include #include #include /* Hash tables for nfs4_clientid state */ #define CLIENT_HASH_BITS 4 #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) #define SESSION_HASH_SIZE 512 struct cld_net; struct nfsd4_client_tracking_ops; enum { /* cache misses due only to checksum comparison failures */ NFSD_NET_PAYLOAD_MISSES, /* amount of memory (in bytes) currently consumed by the DRC */ NFSD_NET_DRC_MEM_USAGE, NFSD_NET_COUNTERS_NUM }; /* * Represents a nfsd "container". With respect to nfsv4 state tracking, the * fields of interest are the *_id_hashtbls and the *_name_tree. These track * the nfs4_client objects by either short or long form clientid. * * Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean * up expired clients and delegations within the container. */ struct nfsd_net { struct cld_net *cld_net; struct cache_detail *svc_expkey_cache; struct cache_detail *svc_export_cache; struct cache_detail *idtoname_cache; struct cache_detail *nametoid_cache; struct lock_manager nfsd4_manager; bool grace_ended; time64_t boot_time; struct dentry *nfsd_client_dir; /* * reclaim_str_hashtbl[] holds known client info from previous reset/reboot * used in reboot/reset lease grace period processing * * conf_id_hashtbl[], and conf_name_tree hold confirmed * setclientid_confirmed info. * * unconf_str_hastbl[] and unconf_name_tree hold unconfirmed * setclientid info. */ struct list_head *reclaim_str_hashtbl; int reclaim_str_hashtbl_size; struct list_head *conf_id_hashtbl; struct rb_root conf_name_tree; struct list_head *unconf_id_hashtbl; struct rb_root unconf_name_tree; struct list_head *sessionid_hashtbl; /* * client_lru holds client queue ordered by nfs4_client.cl_time * for lease renewal. * * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time * for last close replay. * * All of the above fields are protected by the client_mutex. */ struct list_head client_lru; struct list_head close_lru; struct list_head del_recall_lru; /* protected by blocked_locks_lock */ struct list_head blocked_locks_lru; struct delayed_work laundromat_work; /* client_lock protects the client lru list and session hash table */ spinlock_t client_lock; /* protects blocked_locks_lru */ spinlock_t blocked_locks_lock; struct file *rec_file; bool in_grace; const struct nfsd4_client_tracking_ops *client_tracking_ops; time64_t nfsd4_lease; time64_t nfsd4_grace; bool somebody_reclaimed; bool track_reclaim_completes; atomic_t nr_reclaim_complete; bool nfsd_net_up; bool lockd_up; seqlock_t writeverf_lock; unsigned char writeverf[8]; /* * Max number of connections this nfsd container will allow. Defaults * to '0' which is means that it bases this on the number of threads. */ unsigned int max_connections; u32 clientid_base; u32 clientid_counter; u32 clverifier_counter; struct svc_serv *nfsd_serv; /* When a listening socket is added to nfsd, keep_active is set * and this justifies a reference on nfsd_serv. This stops * nfsd_serv from being freed. When the number of threads is * set, keep_active is cleared and the reference is dropped. So * when the last thread exits, the service will be destroyed. */ int keep_active; /* * clientid and stateid data for construction of net unique COPY * stateids. */ u32 s2s_cp_cl_id; struct idr s2s_cp_stateids; spinlock_t s2s_cp_lock; /* * Version information */ bool *nfsd_versions; bool *nfsd4_minorversions; /* * Duplicate reply cache */ struct nfsd_drc_bucket *drc_hashtbl; /* max number of entries allowed in the cache */ unsigned int max_drc_entries; /* number of significant bits in the hash value */ unsigned int maskbits; unsigned int drc_hashsize; /* * Stats and other tracking of on the duplicate reply cache. * The longest_chain* fields are modified with only the per-bucket * cache lock, which isn't really safe and should be fixed if we want * these statistics to be completely accurate. */ /* total number of entries */ atomic_t num_drc_entries; /* Per-netns stats counters */ struct percpu_counter counter[NFSD_NET_COUNTERS_NUM]; /* longest hash chain seen */ unsigned int longest_chain; /* size of cache when we saw the longest hash chain */ unsigned int longest_chain_cachesize; struct shrinker *nfsd_reply_cache_shrinker; /* tracking server-to-server copy mounts */ spinlock_t nfsd_ssc_lock; struct list_head nfsd_ssc_mount_list; wait_queue_head_t nfsd_ssc_waitq; /* utsname taken from the process that starts the server */ char nfsd_name[UNX_MAXNODENAME+1]; struct nfsd_fcache_disposal *fcache_disposal; siphash_key_t siphash_key; atomic_t nfs4_client_count; int nfs4_max_clients; atomic_t nfsd_courtesy_clients; struct shrinker *nfsd_client_shrinker; struct work_struct nfsd_shrinker_work; }; /* Simple check to find out if a given net was properly initialized */ #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl) extern void nfsd_netns_free_versions(struct nfsd_net *nn); extern unsigned int nfsd_net_id; void nfsd_copy_write_verifier(__be32 verf[2], struct nfsd_net *nn); void nfsd_reset_write_verifier(struct nfsd_net *nn); #endif /* __NFSD_NETNS_H__ */