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Diffstat (limited to 'kernel/fs/nfsd/netns.h')
| -rw-r--r-- | kernel/fs/nfsd/netns.h | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/kernel/fs/nfsd/netns.h b/kernel/fs/nfsd/netns.h new file mode 100644 index 000000000..ea6749a32 --- /dev/null +++ b/kernel/fs/nfsd/netns.h @@ -0,0 +1,121 @@ +/* + * 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; + + struct delayed_work laundromat_work; + + /* client_lock protects the client lru list and session hash table */ + spinlock_t client_lock; + + struct file *rec_file; + bool in_grace; + 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; + + 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 int nfsd_net_id; +#endif /* __NFSD_NETNS_H__ */ |