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192 lines
5.0 KiB
192 lines
5.0 KiB
/* 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 <[email protected]> |
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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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#include <linux/percpu_counter.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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enum { |
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/* cache misses due only to checksum comparison failures */ |
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NFSD_NET_PAYLOAD_MISSES, |
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/* amount of memory (in bytes) currently consumed by the DRC */ |
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NFSD_NET_DRC_MEM_USAGE, |
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NFSD_NET_COUNTERS_NUM |
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}; |
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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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time64_t boot_time; |
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/* internal mount of the "nfsd" pseudofilesystem: */ |
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struct vfsmount *nfsd_mnt; |
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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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time64_t nfsd4_lease; |
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time64_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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/* |
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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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* The longest_chain* fields are modified with only the per-bucket |
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* cache lock, which isn't really safe and should be fixed if we want |
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* these statistics to be 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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/* Per-netns stats counters */ |
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struct percpu_counter counter[NFSD_NET_COUNTERS_NUM]; |
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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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/* utsname taken from the process that starts the server */ |
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char nfsd_name[UNX_MAXNODENAME+1]; |
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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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