Release 4.11 fs/nfsd/netns.h

/*
 * per net namespace data structures for nfsd
 *
 * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
 *
 * 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)


#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;

	/*
         * 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
Person
Tokens
Prop
Commits
CommitProp
Stanislav Kinsbursky
130
64.36%
25
67.57%
Jeff Layton
52
25.74%
6
16.22%
Bryan Schumaker
8
3.96%
1
2.70%
Kinglong Mee
6
2.97%
2
5.41%
J. Bruce Fields
4
1.98%
1
2.70%
Alexey Dobriyan
1
0.50%
1
2.70%
Julia Lawall
1
0.50%
1
2.70%
Total
202
100.00%
37
100.00%
Directory: fs/nfsd

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