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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-05-06 01:02:30 +0000
commit76cb841cb886eef6b3bee341a2266c76578724ad (patch)
treef5892e5ba6cc11949952a6ce4ecbe6d516d6ce58 /fs/nfsd/netns.h
parentInitial commit. (diff)
downloadlinux-76cb841cb886eef6b3bee341a2266c76578724ad.tar.xz
linux-76cb841cb886eef6b3bee341a2266c76578724ad.zip
Adding upstream version 4.19.249.upstream/4.19.249upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
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-rw-r--r--fs/nfsd/netns.h132
1 files changed, 132 insertions, 0 deletions
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
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+/*
+ * 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 somebody_reclaimed;
+
+ bool nfsd_net_up;
+ bool lockd_up;
+
+ /* Time of server startup */
+ struct timespec64 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;
+
+ wait_queue_head_t ntf_wq;
+ atomic_t ntf_refcnt;
+};
+
+/* 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__ */