/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * per net namespace data structures for nfsd * * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
*/
/* 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;
enum { /* cache misses due only to checksum comparison failures */
NFSD_STATS_PAYLOAD_MISSES, /* amount of memory (in bytes) currently consumed by the DRC */
NFSD_STATS_DRC_MEM_USAGE,
NFSD_STATS_RC_HITS, /* repcache hits */
NFSD_STATS_RC_MISSES, /* repcache misses */
NFSD_STATS_RC_NOCACHE, /* uncached reqs */
NFSD_STATS_FH_STALE, /* FH stale error */
NFSD_STATS_IO_READ, /* bytes returned to read requests */
NFSD_STATS_IO_WRITE, /* bytes passed in write requests */ #ifdef CONFIG_NFSD_V4
NFSD_STATS_FIRST_NFS4_OP, /* count of individual nfsv4 operations */
NFSD_STATS_LAST_NFS4_OP = NFSD_STATS_FIRST_NFS4_OP + LAST_NFS4_OP, #define NFSD_STATS_NFS4_OP(op) (NFSD_STATS_FIRST_NFS4_OP + (op))
NFSD_STATS_WDELEG_GETATTR, /* count of getattr conflict with wdeleg */ #endif
NFSD_STATS_COUNTERS_NUM
};
/* * 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;
/* * 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;
/* * 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;
atomic_t pending_async_copies;
/* * Version information
*/ bool nfsd_versions[NFSD_MAXVERS + 1]; bool nfsd4_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1];
/* max number of entries allowed in the cache */ unsignedint max_drc_entries;
/* number of significant bits in the hash value */ unsignedint maskbits; unsignedint drc_hashsize;
/* * Stats and other tracking of on the duplicate reply cache. * The longest_chain* fields are modified with only the per-bucket * cache lock, which isn't really safe and should be fixed if we want * these statistics to be completely accurate.
*/
/* total number of entries */
atomic_t num_drc_entries;
/* last time an admin-revoke happened for NFSv4.0 */
time64_t nfs40_last_revoke;
#if IS_ENABLED(CONFIG_NFS_LOCALIO) /* Local clients to be invalidated when net is shut down */
spinlock_t local_clients_lock; struct list_head local_clients; #endif
};
/* Simple check to find out if a given net was properly initialized */ #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
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