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Diffstat (limited to '')
| -rw-r--r-- | fs/nfsd/netns.h | 187 |
1 files changed, 187 insertions, 0 deletions
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h new file mode 100644 index 000000000..02d3d2f0e --- /dev/null +++ b/fs/nfsd/netns.h @@ -0,0 +1,187 @@ +/* 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; + 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; + + /* 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; + + /* Allow umount to wait for nfsd state cleanup */ + struct completion nfsd_shutdown_complete; + + /* + * 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. + * 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; + /* utsname taken from the process that starts the server */ + char nfsd_name[UNX_MAXNODENAME+1]; +}; + +/* 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__ */ |