| /* 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; |
| |
| /* 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; |
| |
| 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; |
| |
| /* |
| * 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__ */ |