186 lines
4.8 KiB
C
186 lines
4.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* per net namespace data structures for nfsd
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*
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* Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
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*/
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#ifndef __NFSD_NETNS_H__
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#define __NFSD_NETNS_H__
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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/* Hash tables for nfs4_clientid state */
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#define CLIENT_HASH_BITS 4
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#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
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#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
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#define SESSION_HASH_SIZE 512
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struct cld_net;
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struct nfsd4_client_tracking_ops;
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/*
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* Represents a nfsd "container". With respect to nfsv4 state tracking, the
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* fields of interest are the *_id_hashtbls and the *_name_tree. These track
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* the nfs4_client objects by either short or long form clientid.
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*
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* Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean
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* up expired clients and delegations within the container.
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*/
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struct nfsd_net {
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struct cld_net *cld_net;
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struct cache_detail *svc_expkey_cache;
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struct cache_detail *svc_export_cache;
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struct cache_detail *idtoname_cache;
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struct cache_detail *nametoid_cache;
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struct lock_manager nfsd4_manager;
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bool grace_ended;
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time_t boot_time;
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struct dentry *nfsd_client_dir;
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/*
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* reclaim_str_hashtbl[] holds known client info from previous reset/reboot
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* used in reboot/reset lease grace period processing
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*
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* conf_id_hashtbl[], and conf_name_tree hold confirmed
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* setclientid_confirmed info.
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*
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* unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
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* setclientid info.
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*/
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struct list_head *reclaim_str_hashtbl;
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int reclaim_str_hashtbl_size;
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struct list_head *conf_id_hashtbl;
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struct rb_root conf_name_tree;
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struct list_head *unconf_id_hashtbl;
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struct rb_root unconf_name_tree;
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struct list_head *sessionid_hashtbl;
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/*
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* client_lru holds client queue ordered by nfs4_client.cl_time
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* for lease renewal.
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*
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* close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
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* for last close replay.
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*
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* All of the above fields are protected by the client_mutex.
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*/
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struct list_head client_lru;
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struct list_head close_lru;
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struct list_head del_recall_lru;
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/* protected by blocked_locks_lock */
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struct list_head blocked_locks_lru;
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struct delayed_work laundromat_work;
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/* client_lock protects the client lru list and session hash table */
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spinlock_t client_lock;
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/* protects blocked_locks_lru */
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spinlock_t blocked_locks_lock;
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struct file *rec_file;
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bool in_grace;
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const struct nfsd4_client_tracking_ops *client_tracking_ops;
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time_t nfsd4_lease;
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time_t nfsd4_grace;
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bool somebody_reclaimed;
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bool track_reclaim_completes;
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atomic_t nr_reclaim_complete;
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bool nfsd_net_up;
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bool lockd_up;
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/* Time of server startup */
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struct timespec64 nfssvc_boot;
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seqlock_t boot_lock;
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/*
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* Max number of connections this nfsd container will allow. Defaults
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* to '0' which is means that it bases this on the number of threads.
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*/
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unsigned int max_connections;
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u32 clientid_base;
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u32 clientid_counter;
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u32 clverifier_counter;
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struct svc_serv *nfsd_serv;
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wait_queue_head_t ntf_wq;
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atomic_t ntf_refcnt;
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/* Allow umount to wait for nfsd state cleanup */
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struct completion nfsd_shutdown_complete;
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/*
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* clientid and stateid data for construction of net unique COPY
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* stateids.
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*/
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u32 s2s_cp_cl_id;
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struct idr s2s_cp_stateids;
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spinlock_t s2s_cp_lock;
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/*
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* Version information
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*/
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bool *nfsd_versions;
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bool *nfsd4_minorversions;
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/*
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* Duplicate reply cache
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*/
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struct nfsd_drc_bucket *drc_hashtbl;
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/* max number of entries allowed in the cache */
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unsigned int max_drc_entries;
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/* number of significant bits in the hash value */
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unsigned int maskbits;
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unsigned int drc_hashsize;
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/*
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* Stats and other tracking of on the duplicate reply cache.
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* These fields and the "rc" fields in nfsdstats are modified
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* with only the per-bucket cache lock, which isn't really safe
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* and should be fixed if we want the statistics to be
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* completely accurate.
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*/
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/* total number of entries */
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atomic_t num_drc_entries;
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/* cache misses due only to checksum comparison failures */
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unsigned int payload_misses;
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/* amount of memory (in bytes) currently consumed by the DRC */
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unsigned int drc_mem_usage;
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/* longest hash chain seen */
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unsigned int longest_chain;
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/* size of cache when we saw the longest hash chain */
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unsigned int longest_chain_cachesize;
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struct shrinker nfsd_reply_cache_shrinker;
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};
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/* Simple check to find out if a given net was properly initialized */
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#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
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extern void nfsd_netns_free_versions(struct nfsd_net *nn);
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extern unsigned int nfsd_net_id;
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void nfsd_copy_boot_verifier(__be32 verf[2], struct nfsd_net *nn);
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void nfsd_reset_boot_verifier(struct nfsd_net *nn);
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#endif /* __NFSD_NETNS_H__ */
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