187 lines
4.9 KiB
C
187 lines
4.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
|
/*
|
|
* per net namespace data structures for nfsd
|
|
*
|
|
* Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
|
|
*/
|
|
|
|
#ifndef __NFSD_NETNS_H__
|
|
#define __NFSD_NETNS_H__
|
|
|
|
#include <net/net_namespace.h>
|
|
#include <net/netns/generic.h>
|
|
|
|
/* 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;
|
|
|
|
/*
|
|
* 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;
|
|
time_t boot_time;
|
|
|
|
/* internal mount of the "nfsd" pseudofilesystem: */
|
|
struct vfsmount *nfsd_mnt;
|
|
|
|
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;
|
|
|
|
time_t nfsd4_lease;
|
|
time_t nfsd4_grace;
|
|
bool somebody_reclaimed;
|
|
|
|
bool track_reclaim_completes;
|
|
atomic_t nr_reclaim_complete;
|
|
|
|
bool nfsd_net_up;
|
|
bool lockd_up;
|
|
|
|
/* Time of server startup */
|
|
struct timespec64 nfssvc_boot;
|
|
seqlock_t boot_lock;
|
|
|
|
/*
|
|
* 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;
|
|
|
|
wait_queue_head_t ntf_wq;
|
|
atomic_t ntf_refcnt;
|
|
|
|
/*
|
|
* 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;
|
|
struct kmem_cache *drc_slab;
|
|
|
|
/* 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.
|
|
* These fields and the "rc" fields in nfsdstats are modified
|
|
* with only the per-bucket cache lock, which isn't really safe
|
|
* and should be fixed if we want the statistics to be
|
|
* completely accurate.
|
|
*/
|
|
|
|
/* total number of entries */
|
|
atomic_t num_drc_entries;
|
|
|
|
/* cache misses due only to checksum comparison failures */
|
|
unsigned int payload_misses;
|
|
|
|
/* amount of memory (in bytes) currently consumed by the DRC */
|
|
unsigned int drc_mem_usage;
|
|
|
|
/* 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;
|
|
};
|
|
|
|
/* 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_boot_verifier(__be32 verf[2], struct nfsd_net *nn);
|
|
void nfsd_reset_boot_verifier(struct nfsd_net *nn);
|
|
#endif /* __NFSD_NETNS_H__ */
|