2 * Copyright (c) 2001 The Regents of the University of Michigan.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the University nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
35 #ifndef _NFSD4_STATE_H
36 #define _NFSD4_STATE_H
38 #include <linux/idr.h>
39 #include <linux/refcount.h>
40 #include <linux/sunrpc/svc_xprt.h>
56 stateid_opaque_t si_opaque;
61 #define NFS4_COPY_STID 1
62 #define NFS4_COPYNOTIFY_STID 2
63 unsigned char cs_type;
67 struct nfsd4_callback {
68 struct nfs4_client *cb_clp;
69 struct rpc_message cb_msg;
70 const struct nfsd4_callback_ops *cb_ops;
71 struct work_struct cb_work;
78 struct nfsd4_callback_ops {
79 void (*prepare)(struct nfsd4_callback *);
80 int (*done)(struct nfsd4_callback *, struct rpc_task *);
81 void (*release)(struct nfsd4_callback *);
86 * A core object that represents a "common" stateid. These are generally
87 * embedded within the different (more specific) stateid objects and contain
88 * fields that are of general use to any stateid.
93 /* A new stateid is added to the cl_stateids idr early before it
94 * is fully initialised. Its sc_type is then zero. After
95 * initialisation the sc_type it set under cl_lock, and then
98 #define SC_TYPE_OPEN BIT(0)
99 #define SC_TYPE_LOCK BIT(1)
100 #define SC_TYPE_DELEG BIT(2)
101 #define SC_TYPE_LAYOUT BIT(3)
102 unsigned short sc_type;
104 /* state_lock protects sc_status for delegation stateids.
105 * ->cl_lock protects sc_status for open and lock stateids.
106 * ->st_mutex also protect sc_status for open stateids.
107 * ->ls_lock protects sc_status for layout stateids.
110 * For an open stateid kept around *only* to process close replays.
111 * For deleg stateid, kept in idr until last reference is dropped.
113 #define SC_STATUS_CLOSED BIT(0)
114 /* For a deleg stateid kept around only to process free_stateid's: */
115 #define SC_STATUS_REVOKED BIT(1)
116 #define SC_STATUS_ADMIN_REVOKED BIT(2)
117 #define SC_STATUS_FREEABLE BIT(3)
118 #define SC_STATUS_FREED BIT(4)
119 unsigned short sc_status;
121 struct list_head sc_cp_list;
122 stateid_t sc_stateid;
124 struct nfs4_client *sc_client;
125 struct nfs4_file *sc_file;
126 void (*sc_free)(struct nfs4_stid *);
129 /* Keep a list of stateids issued by the COPY_NOTIFY, associate it with the
130 * parent OPEN/LOCK/DELEG stateid.
132 struct nfs4_cpntf_state {
133 copy_stateid_t cp_stateid;
134 struct list_head cp_list; /* per parent nfs4_stid */
135 stateid_t cp_p_stateid; /* copy of parent's stateid */
136 clientid_t cp_p_clid; /* copy of parent's clid */
137 time64_t cpntf_time; /* last time stateid used */
141 * RFC 7862 Section 4.8 states:
143 * | A copy offload stateid will be valid until either (A) the client
144 * | or server restarts or (B) the client returns the resource by
145 * | issuing an OFFLOAD_CANCEL operation or the client replies to a
146 * | CB_OFFLOAD operation.
148 * Because a client might not reply to a CB_OFFLOAD, or a reply
149 * might get lost due to connection loss, NFSD purges async copy
150 * state after a short period to prevent it from accumulating
153 #define NFSD_COPY_INITIAL_TTL 10
155 struct nfs4_cb_fattr {
156 struct nfsd4_callback ncf_getattr;
159 /* from CB_GETATTR reply */
163 unsigned long ncf_cb_flags;
164 bool ncf_file_modified;
165 u64 ncf_initial_cinfo;
169 /* bits for ncf_cb_flags */
170 #define CB_GETATTR_BUSY 0
173 * Represents a delegation stateid. The nfs4_client holds references to these
174 * and they are put when it is being destroyed or when the delegation is
175 * returned by the client:
177 * o 1 reference as long as a delegation is still in force (taken when it's
178 * alloc'd, put when it's returned or revoked)
180 * o 1 reference as long as a recall rpc is in progress (taken when the lease
181 * is broken, put when the rpc exits)
183 * o 1 more ephemeral reference for each nfsd thread currently doing something
184 * with that delegation without holding the cl_lock
186 * If the server attempts to recall a delegation and the client doesn't do so
187 * before a timeout, the server may also revoke the delegation. In that case,
188 * the object will either be destroyed (v4.0) or moved to a per-client list of
189 * revoked delegations (v4.1+).
191 * This object is a superset of the nfs4_stid.
193 struct nfs4_delegation {
194 struct nfs4_stid dl_stid; /* must be first field */
195 struct list_head dl_perfile;
196 struct list_head dl_perclnt;
197 struct list_head dl_recall_lru; /* delegation recalled */
198 struct nfs4_clnt_odstate *dl_clnt_odstate;
203 struct nfsd4_callback dl_recall;
207 struct nfs4_cb_fattr dl_cb_fattr;
210 #define cb_to_delegation(cb) \
211 container_of(cb, struct nfs4_delegation, dl_recall)
213 /* client delegation callback info */
214 struct nfs4_cb_conn {
215 /* SETCLIENTID info */
216 struct sockaddr_storage cb_addr;
217 struct sockaddr_storage cb_saddr;
219 u32 cb_prog; /* used only in 4.0 case;
220 per-session otherwise */
221 u32 cb_ident; /* minorversion 0 only */
222 struct svc_xprt *cb_xprt; /* minorversion 1 only */
225 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
227 return container_of(s, struct nfs4_delegation, dl_stid);
230 /* Maximum number of slots per session. 160 is useful for long haul TCP */
231 #define NFSD_MAX_SLOTS_PER_SESSION 160
232 /* Maximum session per slot cache size */
233 #define NFSD_SLOT_CACHE_SIZE 2048
234 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
235 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
236 #define NFSD_MAX_MEM_PER_SESSION \
237 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
242 struct svc_cred sl_cred;
245 #define NFSD4_SLOT_INUSE (1 << 0)
246 #define NFSD4_SLOT_CACHETHIS (1 << 1)
247 #define NFSD4_SLOT_INITIALIZED (1 << 2)
248 #define NFSD4_SLOT_CACHED (1 << 3)
253 struct nfsd4_channel_attrs {
264 struct nfsd4_cb_sec {
265 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
270 struct nfsd4_create_session {
272 struct nfs4_sessionid sessionid;
275 struct nfsd4_channel_attrs fore_channel;
276 struct nfsd4_channel_attrs back_channel;
278 struct nfsd4_cb_sec cb_sec;
281 struct nfsd4_backchannel_ctl {
283 struct nfsd4_cb_sec bc_cb_sec;
286 struct nfsd4_bind_conn_to_session {
287 struct nfs4_sessionid sessionid;
291 /* The single slot clientid cache structure */
292 struct nfsd4_clid_slot {
295 struct nfsd4_create_session sl_cr_ses;
299 struct list_head cn_persession;
300 struct svc_xprt *cn_xprt;
301 struct svc_xpt_user cn_xpt_user;
302 struct nfsd4_session *cn_session;
303 /* CDFC4_FORE, CDFC4_BACK: */
304 unsigned char cn_flags;
307 /* Maximum number of slots that nfsd will use in the backchannel */
308 #define NFSD_BC_SLOT_TABLE_SIZE (sizeof(u32) * 8)
311 * Representation of a v4.1+ session. These are refcounted in a similar fashion
312 * to the nfs4_client. References are only taken when the server is actively
313 * working on the object (primarily during the processing of compounds).
315 struct nfsd4_session {
318 u32 se_cb_slot_avail; /* bitmap of available slots */
319 u32 se_cb_highest_slot; /* highest slot client wants */
322 struct list_head se_hash; /* hash by sessionid */
323 struct list_head se_perclnt;
324 struct nfs4_client *se_client;
325 struct nfs4_sessionid se_sessionid;
326 struct nfsd4_channel_attrs se_fchannel;
327 struct nfsd4_cb_sec se_cb_sec;
328 struct list_head se_conns;
329 u32 se_cb_seq_nr[NFSD_BC_SLOT_TABLE_SIZE];
330 struct nfsd4_slot *se_slots[]; /* forward channel slots */
333 /* formatted contents of nfs4_sessionid */
334 struct nfsd4_sessionid {
340 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
343 * State Meaning Where set
344 * --------------------------------------------------------------------------
345 * | NFSD4_ACTIVE | Confirmed, active | Default |
346 * |------------------- ----------------------------------------------------|
347 * | NFSD4_COURTESY | Courtesy state. | nfs4_get_client_reaplist |
348 * | | Lease/lock/share | |
349 * | | reservation conflict | |
350 * | | can cause Courtesy | |
351 * | | client to be expired | |
352 * |------------------------------------------------------------------------|
353 * | NFSD4_EXPIRABLE | Courtesy client to be| nfs4_laundromat |
354 * | | expired by Laundromat| try_to_expire_client |
355 * | | due to conflict | |
356 * |------------------------------------------------------------------------|
365 * struct nfs4_client - one per client. Clientids live here.
367 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
368 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
369 * Each nfsd_net_ns object contains a set of these and they are tracked via
370 * short and long form clientid. They are hashed and searched for under the
371 * per-nfsd_net client_lock spinlock.
373 * References to it are only held during the processing of compounds, and in
374 * certain other operations. In their "resting state" they have a refcount of
375 * 0. If they are not renewed within a lease period, they become eligible for
376 * destruction by the laundromat.
378 * These objects can also be destroyed if the client sends certain forms of
379 * SETCLIENTID or EXCHANGE_ID operations.
381 * Care is taken *not* to do this however when the objects have an elevated
384 * o Each nfs4_client is hashed by clientid
386 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
387 * sent by the client to identify itself).
389 * o cl_perclient list is used to ensure no dangling stateowner references
390 * when we expire the nfs4_client
393 struct list_head cl_idhash; /* hash by cl_clientid.id */
394 struct rb_node cl_namenode; /* link into by-name trees */
395 struct list_head *cl_ownerstr_hashtbl;
396 struct list_head cl_openowners;
397 struct idr cl_stateids; /* stateid lookup */
398 struct list_head cl_delegations;
399 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
400 struct list_head cl_lru; /* tail queue */
401 #ifdef CONFIG_NFSD_PNFS
402 struct list_head cl_lo_states; /* outstanding layout states */
404 struct xdr_netobj cl_name; /* id generated by client */
405 nfs4_verifier cl_verifier; /* generated by client */
406 time64_t cl_time; /* time of last lease renewal */
407 struct sockaddr_storage cl_addr; /* client ipaddress */
408 bool cl_mach_cred; /* SP4_MACH_CRED in force */
409 struct svc_cred cl_cred; /* setclientid principal */
410 clientid_t cl_clientid; /* generated by server */
411 nfs4_verifier cl_confirm; /* generated by server */
413 atomic_t cl_admin_revoked; /* count of admin-revoked states */
414 /* NFSv4.1 client implementation id: */
415 struct xdr_netobj cl_nii_domain;
416 struct xdr_netobj cl_nii_name;
417 struct timespec64 cl_nii_time;
419 /* for v4.0 and v4.1 callbacks: */
420 struct nfs4_cb_conn cl_cb_conn;
421 #define NFSD4_CLIENT_CB_UPDATE (0)
422 #define NFSD4_CLIENT_CB_KILL (1)
423 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
424 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
425 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
426 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
427 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
428 1 << NFSD4_CLIENT_CB_KILL)
429 #define NFSD4_CLIENT_CB_RECALL_ANY (6)
430 unsigned long cl_flags;
432 struct workqueue_struct *cl_callback_wq;
433 const struct cred *cl_cb_cred;
434 struct rpc_clnt *cl_cb_client;
436 #define NFSD4_CB_UP 0
437 #define NFSD4_CB_UNKNOWN 1
438 #define NFSD4_CB_DOWN 2
439 #define NFSD4_CB_FAULT 3
441 struct nfsd4_callback cl_cb_null;
442 struct nfsd4_session *cl_cb_session;
444 /* for all client information that callback code might need: */
448 struct list_head cl_sessions;
449 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
450 u32 cl_exchange_flags;
451 /* number of rpc's in progress over an associated session: */
452 atomic_t cl_rpc_users;
453 struct nfsdfs_client cl_nfsdfs;
454 struct nfs4_op_map cl_spo_must_allow;
456 /* debugging info directory under nfsd/clients/ : */
457 struct dentry *cl_nfsd_dentry;
458 /* 'info' file within that directory. Ref is not counted,
459 * but will remain valid iff cl_nfsd_dentry != NULL
461 struct dentry *cl_nfsd_info_dentry;
463 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
464 /* wait here for slots */
466 struct list_head async_copies; /* list of async copies */
467 spinlock_t async_lock; /* lock for async copies */
468 atomic_t cl_cb_inflight; /* Outstanding callbacks */
470 unsigned int cl_state;
471 atomic_t cl_delegs_in_recall;
473 struct nfsd4_cb_recall_any *cl_ra;
475 struct list_head cl_ra_cblist;
478 /* struct nfs4_client_reset
479 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
480 * upon lease reset, or from upcall to state_daemon (to read in state
481 * from non-volitile storage) upon reboot.
483 struct nfs4_client_reclaim {
484 struct list_head cr_strhash; /* hash by cr_name */
485 struct nfs4_client *cr_clp; /* pointer to associated clp */
486 struct xdr_netobj cr_name; /* recovery dir name */
487 struct xdr_netobj cr_princhash;
490 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
491 * The OPEN response, typically the largest, requires
492 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
493 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
494 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
497 #define NFSD4_REPLAY_ISIZE 112
500 * Replay buffer, where the result of the last seqid-mutating operation
505 unsigned int rp_buflen;
507 struct knfsd_fh rp_openfh;
509 char rp_ibuf[NFSD4_REPLAY_ISIZE];
512 struct nfs4_stateowner;
514 struct nfs4_stateowner_operations {
515 void (*so_unhash)(struct nfs4_stateowner *);
516 void (*so_free)(struct nfs4_stateowner *);
520 * A core object that represents either an open or lock owner. The object and
521 * lock owner objects have one of these embedded within them. Refcounts and
522 * other fields common to both owner types are contained within these
525 struct nfs4_stateowner {
526 struct list_head so_strhash;
527 struct list_head so_stateids;
528 struct nfs4_client *so_client;
529 const struct nfs4_stateowner_operations *so_ops;
530 /* after increment in nfsd4_bump_seqid, represents the next
531 * sequence id expected from the client: */
534 struct xdr_netobj so_owner; /* open owner name */
535 struct nfs4_replay so_replay;
536 bool so_is_open_owner;
540 * When a file is opened, the client provides an open state owner opaque string
541 * that indicates the "owner" of that open. These objects are refcounted.
542 * References to it are held by each open state associated with it. This object
543 * is a superset of the nfs4_stateowner struct.
545 struct nfs4_openowner {
546 struct nfs4_stateowner oo_owner; /* must be first field */
547 struct list_head oo_perclient;
549 * We keep around openowners a little while after last close,
550 * which saves clients from having to confirm, and allows us to
551 * handle close replays if they come soon enough. The close_lru
552 * is a list of such openowners, to be reaped by the laundromat
553 * thread eventually if they remain unused:
555 struct list_head oo_close_lru;
556 struct nfs4_ol_stateid *oo_last_closed_stid;
557 time64_t oo_time; /* time of placement on so_close_lru */
558 #define NFS4_OO_CONFIRMED 1
559 unsigned char oo_flags;
563 * Represents a generic "lockowner". Similar to an openowner. References to it
564 * are held by the lock stateids that are created on its behalf. This object is
565 * a superset of the nfs4_stateowner struct.
567 struct nfs4_lockowner {
568 struct nfs4_stateowner lo_owner; /* must be first element */
569 struct list_head lo_blocked; /* blocked file_locks */
572 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
574 return container_of(so, struct nfs4_openowner, oo_owner);
577 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
579 return container_of(so, struct nfs4_lockowner, lo_owner);
583 * Per-client state indicating no. of opens and outstanding delegations
584 * on a file from a particular client.'od' stands for 'open & delegation'
586 struct nfs4_clnt_odstate {
587 struct nfs4_client *co_client;
588 struct nfs4_file *co_file;
589 struct list_head co_perfile;
590 refcount_t co_odcount;
594 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
596 * These objects are global. nfsd keeps one instance of a nfs4_file per
597 * filehandle (though it may keep multiple file descriptors for each). Each
598 * inode can have multiple filehandles associated with it, so there is
599 * (potentially) a many to one relationship between this struct and struct
604 struct inode * fi_inode;
607 struct rhlist_head fi_rlist;
608 struct list_head fi_stateids;
610 struct list_head fi_delegations;
611 struct rcu_head fi_rcu;
613 struct list_head fi_clnt_odstate;
614 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
615 struct nfsd_file *fi_fds[3];
617 * Each open or lock stateid contributes 0-4 to the counts
618 * below depending on which bits are set in st_access_bitmap:
619 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
620 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
621 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
623 atomic_t fi_access[2];
625 struct nfsd_file *fi_deleg_file;
627 struct knfsd_fh fi_fhandle;
628 bool fi_had_conflict;
629 #ifdef CONFIG_NFSD_PNFS
630 struct list_head fi_lo_states;
631 atomic_t fi_lo_recalls;
636 * A generic struct representing either a open or lock stateid. The nfs4_client
637 * holds a reference to each of these objects, and they in turn hold a
638 * reference to their respective stateowners. The client's reference is
639 * released in response to a close or unlock (depending on whether it's an open
640 * or lock stateid) or when the client is being destroyed.
642 * In the case of v4.0 open stateids, these objects are preserved for a little
643 * while after close in order to handle CLOSE replays. Those are eventually
644 * reclaimed via a LRU scheme by the laundromat.
646 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
647 * Better suggestions welcome.
649 struct nfs4_ol_stateid {
650 struct nfs4_stid st_stid;
651 struct list_head st_perfile;
652 struct list_head st_perstateowner;
653 struct list_head st_locks;
654 struct nfs4_stateowner *st_stateowner;
655 struct nfs4_clnt_odstate *st_clnt_odstate;
657 * These bitmasks use 3 separate bits for READ, ALLOW, and BOTH; see the
658 * comment above bmap_to_share_mode() for explanation:
660 unsigned char st_access_bmap;
661 unsigned char st_deny_bmap;
662 struct nfs4_ol_stateid *st_openstp;
663 struct mutex st_mutex;
666 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
668 return container_of(s, struct nfs4_ol_stateid, st_stid);
671 struct nfs4_layout_stateid {
672 struct nfs4_stid ls_stid;
673 struct list_head ls_perclnt;
674 struct list_head ls_perfile;
676 struct list_head ls_layouts;
678 struct nfsd_file *ls_file;
679 struct nfsd4_callback ls_recall;
680 stateid_t ls_recall_sid;
682 struct mutex ls_mutex;
685 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
687 return container_of(s, struct nfs4_layout_stateid, ls_stid);
690 /* flags for preprocess_seqid_op() */
691 #define RD_STATE 0x00000010
692 #define WR_STATE 0x00000020
695 NFSPROC4_CLNT_CB_NULL = 0,
696 NFSPROC4_CLNT_CB_RECALL,
697 NFSPROC4_CLNT_CB_LAYOUT,
698 NFSPROC4_CLNT_CB_OFFLOAD,
699 NFSPROC4_CLNT_CB_SEQUENCE,
700 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
701 NFSPROC4_CLNT_CB_RECALL_ANY,
702 NFSPROC4_CLNT_CB_GETATTR,
705 /* Returns true iff a is later than b: */
706 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
708 return (s32)(a->si_generation - b->si_generation) > 0;
712 * When a client tries to get a lock on a file, we set one of these objects
713 * on the blocking lock. When the lock becomes free, we can then issue a
714 * CB_NOTIFY_LOCK to the server.
716 struct nfsd4_blocked_lock {
717 struct list_head nbl_list;
718 struct list_head nbl_lru;
720 struct file_lock nbl_lock;
721 struct knfsd_fh nbl_fh;
722 struct nfsd4_callback nbl_cb;
723 struct kref nbl_kref;
726 struct nfsd4_compound_state;
730 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
731 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
732 stateid_t *stateid, int flags, struct nfsd_file **filp,
733 struct nfs4_stid **cstid);
734 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
735 stateid_t *stateid, unsigned short typemask,
736 unsigned short statusmask,
737 struct nfs4_stid **s, struct nfsd_net *nn);
738 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
739 void (*sc_free)(struct nfs4_stid *));
740 int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
741 void nfs4_free_copy_state(struct nfsd4_copy *copy);
742 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
743 struct nfs4_stid *p_stid);
744 void nfs4_put_stid(struct nfs4_stid *s);
745 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
746 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
747 extern void nfs4_release_reclaim(struct nfsd_net *);
748 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
749 struct nfsd_net *nn);
750 extern __be32 nfs4_check_open_reclaim(struct nfs4_client *);
751 extern void nfsd4_probe_callback(struct nfs4_client *clp);
752 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
753 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
754 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
755 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
756 extern bool nfsd4_run_cb(struct nfsd4_callback *cb);
757 extern void nfsd4_shutdown_callback(struct nfs4_client *);
758 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
759 void nfsd4_async_copy_reaper(struct nfsd_net *nn);
760 bool nfsd4_has_active_async_copies(struct nfs4_client *clp);
761 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
762 struct xdr_netobj princhash, struct nfsd_net *nn);
763 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
765 void put_nfs4_file(struct nfs4_file *fi);
766 extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
767 struct nfs4_cpntf_state *cps);
768 extern __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
769 struct nfs4_client *clp,
770 struct nfs4_cpntf_state **cps);
771 static inline void get_nfs4_file(struct nfs4_file *fi)
773 refcount_inc(&fi->fi_ref);
775 struct nfsd_file *find_any_file(struct nfs4_file *f);
777 #ifdef CONFIG_NFSD_V4
778 void nfsd4_revoke_states(struct net *net, struct super_block *sb);
780 static inline void nfsd4_revoke_states(struct net *net, struct super_block *sb)
785 /* grace period management */
786 void nfsd4_end_grace(struct nfsd_net *nn);
788 /* nfs4recover operations */
789 extern int nfsd4_client_tracking_init(struct net *net);
790 extern void nfsd4_client_tracking_exit(struct net *net);
791 extern void nfsd4_client_record_create(struct nfs4_client *clp);
792 extern void nfsd4_client_record_remove(struct nfs4_client *clp);
793 extern int nfsd4_client_record_check(struct nfs4_client *clp);
794 extern void nfsd4_record_grace_done(struct nfsd_net *nn);
796 static inline bool try_to_expire_client(struct nfs4_client *clp)
798 cmpxchg(&clp->cl_state, NFSD4_COURTESY, NFSD4_EXPIRABLE);
799 return clp->cl_state == NFSD4_EXPIRABLE;
802 extern __be32 nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp,
803 struct dentry *dentry, struct nfs4_delegation **pdp);
804 #endif /* NFSD4_STATE_H */