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Trond Myklebust4ce79712005-06-22 17:16:21 +00001/*
2 * linux/fs/nfs/nfs4_fs.h
3 *
4 * Copyright (C) 2005 Trond Myklebust
5 *
6 * NFSv4-specific filesystem definitions and declarations
7 */
8
9#ifndef __LINUX_FS_NFS_NFS4_FS_H
10#define __LINUX_FS_NFS_NFS4_FS_H
11
12#ifdef CONFIG_NFS_V4
13
14struct idmap;
15
Trond Myklebust4ce79712005-06-22 17:16:21 +000016enum nfs4_client_state {
Trond Myklebuste005e802008-12-23 15:21:48 -050017 NFS4CLNT_MANAGER_RUNNING = 0,
Trond Myklebuste598d842008-12-23 15:21:42 -050018 NFS4CLNT_CHECK_LEASE,
Trond Myklebust58d9714a2006-01-03 09:55:24 +010019 NFS4CLNT_LEASE_EXPIRED,
Trond Myklebustb79a4a12008-12-23 15:21:41 -050020 NFS4CLNT_RECLAIM_REBOOT,
21 NFS4CLNT_RECLAIM_NOGRACE,
Trond Myklebust707fb4b2008-12-23 15:21:47 -050022 NFS4CLNT_DELEGRETURN,
Fred Isaman43f1b3d2011-01-06 11:36:30 +000023 NFS4CLNT_LAYOUTRECALL,
Andy Adamson6df08182009-12-04 15:55:05 -050024 NFS4CLNT_SESSION_RESET,
Andy Adamsonb9efa1b2010-01-20 16:06:27 -050025 NFS4CLNT_RECALL_SLOT,
Trond Myklebustfd954ae2011-04-24 14:28:18 -040026 NFS4CLNT_LEASE_CONFIRM,
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -040027 NFS4CLNT_SERVER_SCOPE_MISMATCH,
Trond Myklebust4ce79712005-06-22 17:16:21 +000028};
29
Trond Myklebusta2118c32010-06-16 09:52:26 -040030enum nfs4_session_state {
Trond Myklebust1055d762010-06-16 09:52:27 -040031 NFS4_SESSION_INITING,
Trond Myklebusta2118c32010-06-16 09:52:26 -040032 NFS4_SESSION_DRAINING,
33};
34
Trond Myklebust2f60ea62011-08-24 15:07:37 -040035#define NFS4_RENEW_TIMEOUT 0x01
36#define NFS4_RENEW_DELEGATION_CB 0x02
37
Trond Myklebust97dc1352010-06-16 09:52:26 -040038struct nfs4_minor_version_ops {
39 u32 minor_version;
40
Bryan Schumaker7c513052011-03-24 17:12:24 +000041 int (*call_sync)(struct rpc_clnt *clnt,
42 struct nfs_server *server,
Trond Myklebust97dc1352010-06-16 09:52:26 -040043 struct rpc_message *msg,
44 struct nfs4_sequence_args *args,
45 struct nfs4_sequence_res *res,
46 int cache_reply);
Trond Myklebuste047a102010-06-16 09:52:27 -040047 int (*validate_stateid)(struct nfs_delegation *,
48 const nfs4_stateid *);
Bryan Schumakerfca78d62011-06-02 14:59:07 -040049 int (*find_root_sec)(struct nfs_server *, struct nfs_fh *,
50 struct nfs_fsinfo *);
Trond Myklebustc48f4f32010-06-16 09:52:27 -040051 const struct nfs4_state_recovery_ops *reboot_recovery_ops;
52 const struct nfs4_state_recovery_ops *nograce_recovery_ops;
53 const struct nfs4_state_maintenance_ops *state_renewal_ops;
Trond Myklebust97dc1352010-06-16 09:52:26 -040054};
55
Trond Myklebust4ce79712005-06-22 17:16:21 +000056/*
Trond Myklebustcee54fc2005-10-18 14:20:12 -070057 * struct rpc_sequence ensures that RPC calls are sent in the exact
58 * order that they appear on the list.
59 */
60struct rpc_sequence {
61 struct rpc_wait_queue wait; /* RPC call delay queue */
62 spinlock_t lock; /* Protects the list */
63 struct list_head list; /* Defines sequence of RPC calls */
64};
65
66#define NFS_SEQID_CONFIRMED 1
67struct nfs_seqid_counter {
68 struct rpc_sequence *sequence;
69 int flags;
70 u32 counter;
71};
72
73struct nfs_seqid {
Trond Myklebustcee54fc2005-10-18 14:20:12 -070074 struct nfs_seqid_counter *sequence;
Trond Myklebust4e513362005-10-20 14:22:41 -070075 struct list_head list;
Trond Myklebustcee54fc2005-10-18 14:20:12 -070076};
77
78static inline void nfs_confirm_seqid(struct nfs_seqid_counter *seqid, int status)
79{
80 if (seqid_mutating_err(-status))
81 seqid->flags |= NFS_SEQID_CONFIRMED;
82}
83
Trond Myklebust9f958ab2007-07-02 13:58:33 -040084struct nfs_unique_id {
85 struct rb_node rb_node;
86 __u64 id;
87};
88
Trond Myklebustcee54fc2005-10-18 14:20:12 -070089/*
Trond Myklebust4ce79712005-06-22 17:16:21 +000090 * NFS4 state_owners and lock_owners are simply labels for ordered
91 * sequences of RPC calls. Their sole purpose is to provide once-only
92 * semantics by allowing the server to identify replayed requests.
Trond Myklebust4ce79712005-06-22 17:16:21 +000093 */
94struct nfs4_state_owner {
Trond Myklebust9f958ab2007-07-02 13:58:33 -040095 struct nfs_unique_id so_owner_id;
Trond Myklebust6f2e64d2007-07-06 10:53:21 -040096 struct nfs_server *so_server;
Chuck Lever0aaaf5c2011-12-06 16:13:48 -050097 struct list_head so_lru;
98 unsigned long so_expires;
Chuck Lever24d292b2010-12-24 01:32:43 +000099 struct rb_node so_server_node;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000100
101 struct rpc_cred *so_cred; /* Associated cred */
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400102
103 spinlock_t so_lock;
104 atomic_t so_count;
Trond Myklebust7eff03a2008-12-23 15:21:43 -0500105 unsigned long so_flags;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000106 struct list_head so_states;
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700107 struct nfs_seqid_counter so_seqid;
108 struct rpc_sequence so_sequence;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000109};
110
Trond Myklebust7eff03a2008-12-23 15:21:43 -0500111enum {
112 NFS_OWNER_RECLAIM_REBOOT,
113 NFS_OWNER_RECLAIM_NOGRACE
114};
115
Alexandros Batsakisafe6c272009-12-09 01:50:14 -0800116#define NFS_LOCK_NEW 0
117#define NFS_LOCK_RECLAIM 1
118#define NFS_LOCK_EXPIRED 2
119
Trond Myklebust4ce79712005-06-22 17:16:21 +0000120/*
121 * struct nfs4_state maintains the client-side state for a given
122 * (state_owner,inode) tuple (OPEN) or state_owner (LOCK).
123 *
124 * OPEN:
125 * In order to know when to OPEN_DOWNGRADE or CLOSE the state on the server,
126 * we need to know how many files are open for reading or writing on a
127 * given inode. This information too is stored here.
128 *
129 * LOCK: one nfs4_state (LOCK) to hold the lock stateid nfs4_state(OPEN)
130 */
131
Trond Myklebust77041ed2010-07-01 12:49:11 -0400132struct nfs4_lock_owner {
133 unsigned int lo_type;
134#define NFS4_ANY_LOCK_TYPE (0U)
135#define NFS4_FLOCK_LOCK_TYPE (1U << 0)
136#define NFS4_POSIX_LOCK_TYPE (1U << 1)
137 union {
138 fl_owner_t posix_owner;
139 pid_t flock_owner;
140 } lo_u;
141};
142
Trond Myklebust4ce79712005-06-22 17:16:21 +0000143struct nfs4_lock_state {
144 struct list_head ls_locks; /* Other lock stateids */
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000145 struct nfs4_state * ls_state; /* Pointer to open state */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000146#define NFS_LOCK_INITIALIZED 1
147 int ls_flags;
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700148 struct nfs_seqid_counter ls_seqid;
Trond Myklebustd0dc3702008-01-10 16:07:54 -0500149 struct rpc_sequence ls_sequence;
Trond Myklebust9f958ab2007-07-02 13:58:33 -0400150 struct nfs_unique_id ls_id;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000151 nfs4_stateid ls_stateid;
152 atomic_t ls_count;
Trond Myklebust77041ed2010-07-01 12:49:11 -0400153 struct nfs4_lock_owner ls_owner;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000154};
155
156/* bits for nfs4_state->flags */
157enum {
158 LK_STATE_IN_USE,
Trond Myklebust003707c2007-07-05 18:07:55 -0400159 NFS_DELEGATED_STATE, /* Current stateid is delegation */
160 NFS_O_RDONLY_STATE, /* OPEN stateid has read-only state */
161 NFS_O_WRONLY_STATE, /* OPEN stateid has write-only state */
162 NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
Trond Myklebustb79a4a12008-12-23 15:21:41 -0500163 NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
164 NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
Trond Myklebust8e469eb2010-01-26 15:42:30 -0500165 NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000166};
167
168struct nfs4_state {
169 struct list_head open_states; /* List of states for the same state_owner */
170 struct list_head inode_states; /* List of states for the same inode */
171 struct list_head lock_states; /* List of subservient lock stateids */
172
173 struct nfs4_state_owner *owner; /* Pointer to the open owner */
174 struct inode *inode; /* Pointer to the inode */
175
176 unsigned long flags; /* Do we hold any locks? */
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000177 spinlock_t state_lock; /* Protects the lock_states list */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000178
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400179 seqlock_t seqlock; /* Protects the stateid/open_stateid */
Trond Myklebust003707c2007-07-05 18:07:55 -0400180 nfs4_stateid stateid; /* Current stateid: may be delegation */
181 nfs4_stateid open_stateid; /* OPEN stateid */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000182
Trond Myklebust8bda4e42007-07-09 10:45:42 -0400183 /* The following 3 fields are protected by owner->so_lock */
Trond Myklebust003707c2007-07-05 18:07:55 -0400184 unsigned int n_rdonly; /* Number of read-only references */
185 unsigned int n_wronly; /* Number of write-only references */
186 unsigned int n_rdwr; /* Number of read/write references */
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500187 fmode_t state; /* State on the server (R,W, or RW) */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000188 atomic_t count;
189};
190
191
192struct nfs4_exception {
193 long timeout;
194 int retry;
Trond Myklebust9e33bed2008-12-23 15:21:46 -0500195 struct nfs4_state *state;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000196};
197
198struct nfs4_state_recovery_ops {
Trond Myklebust7eff03a2008-12-23 15:21:43 -0500199 int owner_flag_bit;
Trond Myklebustb79a4a12008-12-23 15:21:41 -0500200 int state_flag_bit;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000201 int (*recover_open)(struct nfs4_state_owner *, struct nfs4_state *);
202 int (*recover_lock)(struct nfs4_state *, struct file_lock *);
Andy Adamson591d71c2009-04-01 09:22:47 -0400203 int (*establish_clid)(struct nfs_client *, struct rpc_cred *);
Andy Adamson90a16612009-04-01 09:22:48 -0400204 struct rpc_cred * (*get_clid_cred)(struct nfs_client *);
Ricardo Labiagafce5c832009-12-05 16:08:41 -0500205 int (*reclaim_complete)(struct nfs_client *);
Trond Myklebust4ce79712005-06-22 17:16:21 +0000206};
207
Benny Halevy29fba382009-04-01 09:22:44 -0400208struct nfs4_state_maintenance_ops {
Trond Myklebust2f60ea62011-08-24 15:07:37 -0400209 int (*sched_state_renewal)(struct nfs_client *, struct rpc_cred *, unsigned);
Andy Adamsona7b72102009-04-01 09:22:46 -0400210 struct rpc_cred * (*get_state_renewal_cred_locked)(struct nfs_client *);
Benny Halevy8e69514f2009-04-01 09:22:45 -0400211 int (*renew_lease)(struct nfs_client *, struct rpc_cred *);
Benny Halevy29fba382009-04-01 09:22:44 -0400212};
213
Al Virof786aa92009-02-20 05:51:22 +0000214extern const struct dentry_operations nfs4_dentry_operations;
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -0800215extern const struct inode_operations nfs4_dir_inode_operations;
J. Bruce Fields6b3b5492005-06-22 17:16:22 +0000216
Trond Myklebust4ce79712005-06-22 17:16:21 +0000217/* nfs4proc.c */
Trond Myklebustbb8b27e2010-04-16 16:43:06 -0400218extern int nfs4_proc_setclientid(struct nfs_client *, u32, unsigned short, struct rpc_cred *, struct nfs4_setclientid_res *);
219extern int nfs4_proc_setclientid_confirm(struct nfs_client *, struct nfs4_setclientid_res *arg, struct rpc_cred *);
Andy Adamson4d643d12009-12-04 15:52:24 -0500220extern int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred);
Andy Adamson591d71c2009-04-01 09:22:47 -0400221extern int nfs4_init_clientid(struct nfs_client *, struct rpc_cred *);
Andy Adamson4d643d12009-12-04 15:52:24 -0500222extern int nfs41_init_clientid(struct nfs_client *, struct rpc_cred *);
Al Viro643168c2011-06-22 18:20:23 -0400223extern int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait, bool roc);
Trond Myklebust55a97592006-06-09 09:34:19 -0400224extern int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle);
Trond Myklebust56659e92007-07-17 21:52:39 -0400225extern int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name,
Manoj Naik7aaa0b32006-06-09 09:34:23 -0400226 struct nfs4_fs_locations *fs_locations, struct page *page);
Trond Myklebustd3c7b7c2010-07-01 12:49:01 -0400227extern void nfs4_release_lockowner(const struct nfs4_lock_state *);
Aneesh Kumar K.V64c2ce82010-12-09 11:35:25 +0000228extern const struct xattr_handler *nfs4_xattr_handlers[];
Trond Myklebust4ce79712005-06-22 17:16:21 +0000229
Andy Adamson557134a2009-04-01 09:21:53 -0400230#if defined(CONFIG_NFS_V4_1)
Trond Myklebust035168a2010-06-16 09:52:26 -0400231static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
232{
233 return server->nfs_client->cl_session;
234}
235
236extern int nfs4_setup_sequence(const struct nfs_server *server,
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400237 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
238 int cache_reply, struct rpc_task *task);
Andy Adamsondc70d7b2011-03-01 01:34:19 +0000239extern int nfs41_setup_sequence(struct nfs4_session *session,
240 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
241 int cache_reply, struct rpc_task *task);
Andy Adamson557134a2009-04-01 09:21:53 -0400242extern void nfs4_destroy_session(struct nfs4_session *session);
243extern struct nfs4_session *nfs4_alloc_session(struct nfs_client *clp);
Trond Myklebustf26468f2009-12-05 19:32:11 -0500244extern int nfs4_proc_create_session(struct nfs_client *);
Andy Adamsonc3fad1b2009-04-01 09:22:39 -0400245extern int nfs4_proc_destroy_session(struct nfs4_session *);
Trond Myklebustfccba802009-07-21 16:48:07 -0400246extern int nfs4_init_session(struct nfs_server *server);
Ricardo Labiaga9430fb62009-12-06 12:23:46 -0500247extern int nfs4_proc_get_lease_time(struct nfs_client *clp,
248 struct nfs_fsinfo *fsinfo);
Andy Adamson863a3c62011-03-23 13:27:54 +0000249extern int nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data,
Andy Adamsonef311532011-03-12 02:58:10 -0500250 bool sync);
Andy Adamson94de8b22011-03-01 01:34:12 +0000251
252static inline bool
253is_ds_only_client(struct nfs_client *clp)
254{
255 return (clp->cl_exchange_flags & EXCHGID4_FLAG_MASK_PNFS) ==
256 EXCHGID4_FLAG_USE_PNFS_DS;
257}
Andy Adamsond83217c2011-03-01 01:34:17 +0000258
259static inline bool
260is_ds_client(struct nfs_client *clp)
261{
262 return clp->cl_exchange_flags & EXCHGID4_FLAG_USE_PNFS_DS;
263}
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400264#else /* CONFIG_NFS_v4_1 */
Trond Myklebust035168a2010-06-16 09:52:26 -0400265static inline struct nfs4_session *nfs4_get_session(const struct nfs_server *server)
266{
267 return NULL;
268}
269
270static inline int nfs4_setup_sequence(const struct nfs_server *server,
Andy Adamsonfbcd4ab2009-04-01 09:22:15 -0400271 struct nfs4_sequence_args *args, struct nfs4_sequence_res *res,
272 int cache_reply, struct rpc_task *task)
273{
274 return 0;
275}
Trond Myklebustfccba802009-07-21 16:48:07 -0400276
277static inline int nfs4_init_session(struct nfs_server *server)
278{
279 return 0;
280}
Andy Adamson94de8b22011-03-01 01:34:12 +0000281
282static inline bool
283is_ds_only_client(struct nfs_client *clp)
284{
285 return false;
286}
Andy Adamsond83217c2011-03-01 01:34:17 +0000287
288static inline bool
289is_ds_client(struct nfs_client *clp)
290{
291 return false;
292}
Andy Adamson557134a2009-04-01 09:21:53 -0400293#endif /* CONFIG_NFS_V4_1 */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000294
Trond Myklebust97dc1352010-06-16 09:52:26 -0400295extern const struct nfs4_minor_version_ops *nfs_v4_minor_ops[];
Benny Halevy29fba382009-04-01 09:22:44 -0400296
Trond Myklebust4ce79712005-06-22 17:16:21 +0000297extern const u32 nfs4_fattr_bitmap[2];
298extern const u32 nfs4_statfs_bitmap[2];
299extern const u32 nfs4_pathconf_bitmap[2];
Fred Isamandae100c2011-07-30 20:52:37 -0400300extern const u32 nfs4_fsinfo_bitmap[3];
Manoj Naik830b8e32006-06-09 09:34:25 -0400301extern const u32 nfs4_fs_locations_bitmap[2];
Trond Myklebust4ce79712005-06-22 17:16:21 +0000302
303/* nfs4renewd.c */
David Howellsadfa6f92006-08-22 20:06:08 -0400304extern void nfs4_schedule_state_renewal(struct nfs_client *);
Trond Myklebust4ce79712005-06-22 17:16:21 +0000305extern void nfs4_renewd_prepare_shutdown(struct nfs_server *);
David Howellsadfa6f92006-08-22 20:06:08 -0400306extern void nfs4_kill_renewd(struct nfs_client *);
David Howells65f27f32006-11-22 14:55:48 +0000307extern void nfs4_renew_state(struct work_struct *);
Trond Myklebust4ce79712005-06-22 17:16:21 +0000308
309/* nfs4state.c */
Andy Adamsona7b72102009-04-01 09:22:46 -0400310struct rpc_cred *nfs4_get_setclientid_cred(struct nfs_client *clp);
Trond Myklebust6dc9d572008-12-23 15:21:41 -0500311struct rpc_cred *nfs4_get_renew_cred_locked(struct nfs_client *clp);
Andy Adamsona7b72102009-04-01 09:22:46 -0400312#if defined(CONFIG_NFS_V4_1)
313struct rpc_cred *nfs4_get_machine_cred_locked(struct nfs_client *clp);
Andy Adamsonb4b82602009-04-01 09:22:49 -0400314struct rpc_cred *nfs4_get_exchange_id_cred(struct nfs_client *clp);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500315extern void nfs4_schedule_session_recovery(struct nfs4_session *);
316#else
317static inline void nfs4_schedule_session_recovery(struct nfs4_session *session)
318{
319}
Andy Adamsona7b72102009-04-01 09:22:46 -0400320#endif /* CONFIG_NFS_V4_1 */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000321
322extern struct nfs4_state_owner * nfs4_get_state_owner(struct nfs_server *, struct rpc_cred *);
323extern void nfs4_put_state_owner(struct nfs4_state_owner *);
Chuck Lever0aaaf5c2011-12-06 16:13:48 -0500324extern void nfs4_purge_state_owners(struct nfs_server *);
Trond Myklebust4ce79712005-06-22 17:16:21 +0000325extern struct nfs4_state * nfs4_get_open_state(struct inode *, struct nfs4_state_owner *);
326extern void nfs4_put_open_state(struct nfs4_state *);
Al Viro643168c2011-06-22 18:20:23 -0400327extern void nfs4_close_state(struct nfs4_state *, fmode_t);
328extern void nfs4_close_sync(struct nfs4_state *, fmode_t);
Trond Myklebustdc0b0272008-12-23 15:21:56 -0500329extern void nfs4_state_set_mode_locked(struct nfs4_state *, fmode_t);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500330extern void nfs4_schedule_lease_recovery(struct nfs_client *);
Trond Myklebustb0d3ded2008-12-23 15:21:50 -0500331extern void nfs4_schedule_state_manager(struct nfs_client *);
Trond Myklebust042b60b2011-08-24 15:07:37 -0400332extern void nfs4_schedule_path_down_recovery(struct nfs_client *clp);
Trond Myklebust0400a6b2011-03-09 16:00:53 -0500333extern void nfs4_schedule_stateid_recovery(const struct nfs_server *, struct nfs4_state *);
Alexandros Batsakis0629e372009-12-05 13:46:14 -0500334extern void nfs41_handle_sequence_flag_errors(struct nfs_client *clp, u32 flags);
Andy Adamsonb9efa1b2010-01-20 16:06:27 -0500335extern void nfs41_handle_recall_slot(struct nfs_client *clp);
Weston Andros Adamson78fe0f42011-05-31 19:05:47 -0400336extern void nfs41_handle_server_scope(struct nfs_client *,
337 struct server_scope **);
Trond Myklebustfaf5f492005-10-18 14:20:15 -0700338extern void nfs4_put_lock_state(struct nfs4_lock_state *lsp);
Trond Myklebust8d0a8a92005-06-22 17:16:32 +0000339extern int nfs4_set_lock_state(struct nfs4_state *state, struct file_lock *fl);
Trond Myklebust77041ed2010-07-01 12:49:11 -0400340extern void nfs4_copy_stateid(nfs4_stateid *, struct nfs4_state *, fl_owner_t, pid_t);
Trond Myklebust4ce79712005-06-22 17:16:21 +0000341
Trond Myklebust8535b2b2010-05-13 12:51:01 -0400342extern struct nfs_seqid *nfs_alloc_seqid(struct nfs_seqid_counter *counter, gfp_t gfp_mask);
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700343extern int nfs_wait_on_sequence(struct nfs_seqid *seqid, struct rpc_task *task);
344extern void nfs_increment_open_seqid(int status, struct nfs_seqid *seqid);
345extern void nfs_increment_lock_seqid(int status, struct nfs_seqid *seqid);
Trond Myklebust72211db2009-12-15 14:47:36 -0500346extern void nfs_release_seqid(struct nfs_seqid *seqid);
Trond Myklebustcee54fc2005-10-18 14:20:12 -0700347extern void nfs_free_seqid(struct nfs_seqid *seqid);
348
Trond Myklebust4ce79712005-06-22 17:16:21 +0000349extern const nfs4_stateid zero_stateid;
350
351/* nfs4xdr.c */
Trond Myklebust4ce79712005-06-22 17:16:21 +0000352extern struct rpc_procinfo nfs4_procedures[];
353
354struct nfs4_mount_data;
355
356/* callback_xdr.c */
357extern struct svc_version nfs4_callback_version1;
Alexandros Batsakis07bccc22009-12-05 13:19:01 -0500358extern struct svc_version nfs4_callback_version4;
Trond Myklebust4ce79712005-06-22 17:16:21 +0000359
360#else
361
Al Viro643168c2011-06-22 18:20:23 -0400362#define nfs4_close_state(a, b) do { } while (0)
363#define nfs4_close_sync(a, b) do { } while (0)
Trond Myklebust4ce79712005-06-22 17:16:21 +0000364
365#endif /* CONFIG_NFS_V4 */
366#endif /* __LINUX_FS_NFS_NFS4_FS.H */