forked from luck/tmp_suning_uos_patched
14a571a8ec
Add some comments that describe what each of these objects is, and how they related to one another. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
122 lines
3.5 KiB
C
122 lines
3.5 KiB
C
/*
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* per net namespace data structures for nfsd
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*
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* Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the Free
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* Software Foundation; either version 2 of the License, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc., 51
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* Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __NFSD_NETNS_H__
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#define __NFSD_NETNS_H__
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#include <net/net_namespace.h>
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#include <net/netns/generic.h>
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/* Hash tables for nfs4_clientid state */
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#define CLIENT_HASH_BITS 4
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#define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS)
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#define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1)
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#define SESSION_HASH_SIZE 512
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struct cld_net;
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struct nfsd4_client_tracking_ops;
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/*
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* Represents a nfsd "container". With respect to nfsv4 state tracking, the
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* fields of interest are the *_id_hashtbls and the *_name_tree. These track
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* the nfs4_client objects by either short or long form clientid.
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*
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* Each nfsd_net runs a nfs4_laundromat workqueue job when necessary to clean
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* up expired clients and delegations within the container.
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*/
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struct nfsd_net {
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struct cld_net *cld_net;
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struct cache_detail *svc_expkey_cache;
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struct cache_detail *svc_export_cache;
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struct cache_detail *idtoname_cache;
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struct cache_detail *nametoid_cache;
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struct lock_manager nfsd4_manager;
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bool grace_ended;
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time_t boot_time;
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/*
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* reclaim_str_hashtbl[] holds known client info from previous reset/reboot
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* used in reboot/reset lease grace period processing
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*
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* conf_id_hashtbl[], and conf_name_tree hold confirmed
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* setclientid_confirmed info.
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*
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* unconf_str_hastbl[] and unconf_name_tree hold unconfirmed
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* setclientid info.
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*/
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struct list_head *reclaim_str_hashtbl;
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int reclaim_str_hashtbl_size;
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struct list_head *conf_id_hashtbl;
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struct rb_root conf_name_tree;
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struct list_head *unconf_id_hashtbl;
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struct rb_root unconf_name_tree;
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struct list_head *sessionid_hashtbl;
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/*
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* client_lru holds client queue ordered by nfs4_client.cl_time
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* for lease renewal.
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*
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* close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time
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* for last close replay.
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*
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* All of the above fields are protected by the client_mutex.
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*/
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struct list_head client_lru;
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struct list_head close_lru;
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struct list_head del_recall_lru;
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struct delayed_work laundromat_work;
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/* client_lock protects the client lru list and session hash table */
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spinlock_t client_lock;
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struct file *rec_file;
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bool in_grace;
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struct nfsd4_client_tracking_ops *client_tracking_ops;
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time_t nfsd4_lease;
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time_t nfsd4_grace;
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bool nfsd_net_up;
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bool lockd_up;
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/* Time of server startup */
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struct timeval nfssvc_boot;
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/*
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* Max number of connections this nfsd container will allow. Defaults
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* to '0' which is means that it bases this on the number of threads.
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*/
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unsigned int max_connections;
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u32 clientid_counter;
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struct svc_serv *nfsd_serv;
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};
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/* Simple check to find out if a given net was properly initialized */
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#define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
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extern int nfsd_net_id;
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#endif /* __NFSD_NETNS_H__ */
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