cregit-Linux how code gets into the kernel

Release 4.10 fs/nfsd/netns.h

Directory: fs/nfsd
 * per net namespace data structures for nfsd
 * Copyright (C) 2012, Jeff Layton <>
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation; either version 2 of the License, or (at your option)
 * any later version.
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 51
 * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

#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)


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;

         * 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 nfsd_net_up;
bool lockd_up;

	/* Time of server startup */
struct timeval nfssvc_boot;

         * 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_counter;
u32 clverifier_counter;

struct svc_serv *nfsd_serv;

/* Simple check to find out if a given net was properly initialized */

#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)

extern unsigned int nfsd_net_id;
#endif /* __NFSD_NETNS_H__ */

Overall Contributors

stanislav kinsburskystanislav kinsbursky13064.36%2567.57%
jeff laytonjeff layton5225.74%616.22%
bryan schumakerbryan schumaker83.96%12.70%
kinglong meekinglong mee62.97%25.41%
j. bruce fieldsj. bruce fields41.98%12.70%
alexey dobriyanalexey dobriyan10.50%12.70%
julia lawalljulia lawall10.50%12.70%
Directory: fs/nfsd
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