[GitHub/LineageOS/android_kernel_motorola_exynos9610.git] / 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__ */
Commit	Line	Data
	1	/*
	2	* per net namespace data structures for nfsd
	3	*
	4	* Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the Free
	8	* Software Foundation; either version 2 of the License, or (at your option)
	9	* any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful, but WITHOUT
	12	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	13	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	14	* more details.
	15	*
	16	* You should have received a copy of the GNU General Public License along with
	17	* this program; if not, write to the Free Software Foundation, Inc., 51
	18	* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	19	*/
	20
	21	#ifndef __NFSD_NETNS_H__
	22	#define __NFSD_NETNS_H__
	23
	24	#include <net/net_namespace.h>
	25	#include <net/netns/generic.h>
	26
	27	/* Hash tables for nfs4_clientid state */
	28	#define CLIENT_HASH_BITS 4
	29	#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
	30	#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
	31
	32	#define SESSION_HASH_SIZE 512
	33
	34	struct cld_net;
	35	struct nfsd4_client_tracking_ops;
	36
	37	/*
	38	* Represents a nfsd "container". With respect to nfsv4 state tracking, the
	39	* fields of interest are the _id_hashtbls and the _name_tree. These track
	40	* the nfs4_client objects by either short or long form clientid.
	41	*
	42	* Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean
	43	* up expired clients and delegations within the container.
	44	*/
	45	struct nfsd_net {
	46	struct cld_net *cld_net;
	47
	48	struct cache_detail *svc_expkey_cache;
	49	struct cache_detail *svc_export_cache;
	50
	51	struct cache_detail *idtoname_cache;
	52	struct cache_detail *nametoid_cache;
	53
	54	struct lock_manager nfsd4_manager;
	55	bool grace_ended;
	56	time_t boot_time;
	57
	58	/*
	59	* reclaim_str_hashtbl[] holds known client info from previous reset/reboot
	60	* used in reboot/reset lease grace period processing
	61	*
	62	* conf_id_hashtbl[], and conf_name_tree hold confirmed
	63	* setclientid_confirmed info.
	64	*
	65	* unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
	66	* setclientid info.
	67	*/
	68	struct list_head *reclaim_str_hashtbl;
	69	int reclaim_str_hashtbl_size;
	70	struct list_head *conf_id_hashtbl;
	71	struct rb_root conf_name_tree;
	72	struct list_head *unconf_id_hashtbl;
	73	struct rb_root unconf_name_tree;
	74	struct list_head *sessionid_hashtbl;
	75	/*
	76	* client_lru holds client queue ordered by nfs4_client.cl_time
	77	* for lease renewal.
	78	*
	79	* close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
	80	* for last close replay.
	81	*
	82	* All of the above fields are protected by the client_mutex.
	83	*/
	84	struct list_head client_lru;
	85	struct list_head close_lru;
	86	struct list_head del_recall_lru;
	87
	88	/* protected by blocked_locks_lock */
	89	struct list_head blocked_locks_lru;
	90
	91	struct delayed_work laundromat_work;
	92
	93	/* client_lock protects the client lru list and session hash table */
	94	spinlock_t client_lock;
	95
	96	/* protects blocked_locks_lru */
	97	spinlock_t blocked_locks_lock;
	98
	99	struct file *rec_file;
	100	bool in_grace;
	101	const struct nfsd4_client_tracking_ops *client_tracking_ops;
	102
	103	time_t nfsd4_lease;
	104	time_t nfsd4_grace;
	105
	106	bool nfsd_net_up;
	107	bool lockd_up;
	108
	109	/* Time of server startup */
	110	struct timeval nfssvc_boot;
	111
	112	/*
	113	* Max number of connections this nfsd container will allow. Defaults
	114	* to '0' which is means that it bases this on the number of threads.
	115	*/
	116	unsigned int max_connections;
	117
	118	u32 clientid_counter;
	119	u32 clverifier_counter;
	120
	121	struct svc_serv *nfsd_serv;
	122	};
	123
	124	/* Simple check to find out if a given net was properly initialized */
	125	#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
	126
	127	extern unsigned int nfsd_net_id;
	128	#endif /* __NFSD_NETNS_H__ */