1 /* 1
2 * Copyright (c) 2001 The Regents of the Univ
3 * All rights reserved.
4 *
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <andros@umich.edu>
7 *
8 * Redistribution and use in source and binar
9 * modification, are permitted provided that
10 * are met:
11 *
12 * 1. Redistributions of source code must ret
13 * notice, this list of conditions and the
14 * 2. Redistributions in binary form must rep
15 * notice, this list of conditions and the
16 * documentation and/or other materials pr
17 * 3. Neither the name of the University nor
18 * contributors may be used to endorse or
19 * from this software without specific pri
20 *
21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND AN
22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
23 * MERCHANTABILITY AND FITNESS FOR A PARTICUL
24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPEC
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIA
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WA
31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILI
32 *
33 */
34
35 #ifndef _NFSD4_STATE_H
36 #define _NFSD4_STATE_H
37
38 #include <linux/idr.h>
39 #include <linux/refcount.h>
40 #include <linux/sunrpc/svc_xprt.h>
41 #include "nfsfh.h"
42 #include "nfsd.h"
43
44 typedef struct {
45 u32 cl_boot;
46 u32 cl_id;
47 } clientid_t;
48
49 typedef struct {
50 clientid_t so_clid;
51 u32 so_id;
52 } stateid_opaque_t;
53
54 typedef struct {
55 u32 si_generation;
56 stateid_opaque_t si_opaque;
57 } stateid_t;
58
59 typedef struct {
60 stateid_t cs_stid;
61 #define NFS4_COPY_STID 1
62 #define NFS4_COPYNOTIFY_STID 2
63 unsigned char cs_type;
64 refcount_t cs_count;
65 } copy_stateid_t;
66
67 struct nfsd4_callback {
68 struct nfs4_client *cb_clp;
69 struct rpc_message cb_msg;
70 const struct nfsd4_callback_ops *cb_op
71 struct work_struct cb_work;
72 int cb_seq_status;
73 int cb_status;
74 bool cb_need_restart;
75 bool cb_holds_slot;
76 };
77
78 struct nfsd4_callback_ops {
79 void (*prepare)(struct nfsd4_callback
80 int (*done)(struct nfsd4_callback *, s
81 void (*release)(struct nfsd4_callback
82 uint32_t opcode;
83 };
84
85 /*
86 * A core object that represents a "common" st
87 * embedded within the different (more specifi
88 * fields that are of general use to any state
89 */
90 struct nfs4_stid {
91 refcount_t sc_count;
92
93 /* A new stateid is added to the cl_st
94 * is fully initialised. Its sc_type
95 * initialisation the sc_type it set u
96 * never changes.
97 */
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;
103
104 /* state_lock protects sc_status for delegatio
105 * ->cl_lock protects sc_status for open and l
106 * ->st_mutex also protect sc_status for open
107 * ->ls_lock protects sc_status for layout sta
108 */
109 /*
110 * For an open stateid kept around *only* to p
111 * For deleg stateid, kept in idr until last r
112 */
113 #define SC_STATUS_CLOSED BIT(0)
114 /* For a deleg stateid kept around only to pro
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;
120
121 struct list_head sc_cp_list;
122 stateid_t sc_stateid;
123 spinlock_t sc_lock;
124 struct nfs4_client *sc_client;
125 struct nfs4_file *sc_file;
126 void (*sc_free)(str
127 };
128
129 /* Keep a list of stateids issued by the COPY_
130 * parent OPEN/LOCK/DELEG stateid.
131 */
132 struct nfs4_cpntf_state {
133 copy_stateid_t cp_stateid;
134 struct list_head cp_list;
135 stateid_t cp_p_stateid;
136 clientid_t cp_p_clid;
137 time64_t cpntf_time;
138 };
139
140 struct nfs4_cb_fattr {
141 struct nfsd4_callback ncf_getattr;
142 u32 ncf_cb_status;
143 u32 ncf_cb_bmap[1];
144
145 /* from CB_GETATTR reply */
146 u64 ncf_cb_change;
147 u64 ncf_cb_fsize;
148
149 unsigned long ncf_cb_flags;
150 bool ncf_file_modified;
151 u64 ncf_initial_cinfo;
152 u64 ncf_cur_fsize;
153 };
154
155 /* bits for ncf_cb_flags */
156 #define CB_GETATTR_BUSY 0
157
158 /*
159 * Represents a delegation stateid. The nfs4_c
160 * and they are put when it is being destroyed
161 * returned by the client:
162 *
163 * o 1 reference as long as a delegation is st
164 * alloc'd, put when it's returned or revoke
165 *
166 * o 1 reference as long as a recall rpc is in
167 * is broken, put when the rpc exits)
168 *
169 * o 1 more ephemeral reference for each nfsd
170 * with that delegation without holding the
171 *
172 * If the server attempts to recall a delegati
173 * before a timeout, the server may also revok
174 * the object will either be destroyed (v4.0)
175 * revoked delegations (v4.1+).
176 *
177 * This object is a superset of the nfs4_stid.
178 */
179 struct nfs4_delegation {
180 struct nfs4_stid dl_stid; /* mu
181 struct list_head dl_perfile;
182 struct list_head dl_perclnt;
183 struct list_head dl_recall_lru;
184 struct nfs4_clnt_odstate *dl_clnt_odst
185 u32 dl_type;
186 time64_t dl_time;
187 /* For recall: */
188 int dl_retries;
189 struct nfsd4_callback dl_recall;
190 bool dl_recalled;
191
192 /* for CB_GETATTR */
193 struct nfs4_cb_fattr dl_cb_fattr;
194 };
195
196 #define cb_to_delegation(cb) \
197 container_of(cb, struct nfs4_delegatio
198
199 /* client delegation callback info */
200 struct nfs4_cb_conn {
201 /* SETCLIENTID info */
202 struct sockaddr_storage cb_addr;
203 struct sockaddr_storage cb_saddr;
204 size_t cb_addrlen;
205 u32 cb_prog; /* us
206 pe
207 u32 cb_ident;
208 struct svc_xprt *cb_xprt;
209 };
210
211 static inline struct nfs4_delegation *delegsta
212 {
213 return container_of(s, struct nfs4_del
214 }
215
216 /* Maximum number of slots per session. 160 is
217 #define NFSD_MAX_SLOTS_PER_SESSION 160
218 /* Maximum session per slot cache size */
219 #define NFSD_SLOT_CACHE_SIZE 2048
220 /* Maximum number of NFSD_SLOT_CACHE_SIZE slot
221 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION
222 #define NFSD_MAX_MEM_PER_SESSION \
223 (NFSD_CACHE_SIZE_SLOTS_PER_SES
224
225 struct nfsd4_slot {
226 u32 sl_seqid;
227 __be32 sl_status;
228 struct svc_cred sl_cred;
229 u32 sl_datalen;
230 u16 sl_opcnt;
231 #define NFSD4_SLOT_INUSE (1 << 0)
232 #define NFSD4_SLOT_CACHETHIS (1 << 1)
233 #define NFSD4_SLOT_INITIALIZED (1 << 2)
234 #define NFSD4_SLOT_CACHED (1 << 3)
235 u8 sl_flags;
236 char sl_data[];
237 };
238
239 struct nfsd4_channel_attrs {
240 u32 headerpadsz;
241 u32 maxreq_sz;
242 u32 maxresp_sz;
243 u32 maxresp_cached;
244 u32 maxops;
245 u32 maxreqs;
246 u32 nr_rdma_attrs;
247 u32 rdma_attrs;
248 };
249
250 struct nfsd4_cb_sec {
251 u32 flavor; /* (u32)(-1) used to m
252 kuid_t uid;
253 kgid_t gid;
254 };
255
256 struct nfsd4_create_session {
257 clientid_t client
258 struct nfs4_sessionid sessio
259 u32 seqid;
260 u32 flags;
261 struct nfsd4_channel_attrs fore_c
262 struct nfsd4_channel_attrs back_c
263 u32 callba
264 struct nfsd4_cb_sec cb_sec
265 };
266
267 struct nfsd4_backchannel_ctl {
268 u32 bc_cb_program;
269 struct nfsd4_cb_sec bc_cb_
270 };
271
272 struct nfsd4_bind_conn_to_session {
273 struct nfs4_sessionid sessio
274 u32 dir;
275 };
276
277 /* The single slot clientid cache structure */
278 struct nfsd4_clid_slot {
279 u32 sl_seq
280 __be32 sl_sta
281 struct nfsd4_create_session sl_cr_
282 };
283
284 struct nfsd4_conn {
285 struct list_head cn_persession;
286 struct svc_xprt *cn_xprt;
287 struct svc_xpt_user cn_xpt_user;
288 struct nfsd4_session *cn_session;
289 /* CDFC4_FORE, CDFC4_BACK: */
290 unsigned char cn_flags;
291 };
292
293 /*
294 * Representation of a v4.1+ session. These ar
295 * to the nfs4_client. References are only tak
296 * working on the object (primarily during the
297 */
298 struct nfsd4_session {
299 atomic_t se_ref;
300 struct list_head se_hash;
301 struct list_head se_perclnt;
302 /* See SESSION4_PERSIST, etc. for standard fla
303 #define NFS4_SESSION_DEAD 0x010
304 u32 se_flags;
305 struct nfs4_client *se_client;
306 struct nfs4_sessionid se_sessionid;
307 struct nfsd4_channel_attrs se_fchannel
308 struct nfsd4_channel_attrs se_bchannel
309 struct nfsd4_cb_sec se_cb_sec;
310 struct list_head se_conns;
311 u32 se_cb_prog;
312 u32 se_cb_seq_nr;
313 struct nfsd4_slot *se_slots[];
314 };
315
316 /* formatted contents of nfs4_sessionid */
317 struct nfsd4_sessionid {
318 clientid_t clientid;
319 u32 sequence;
320 u32 reserved;
321 };
322
323 #define HEXDIR_LEN 33 /* hex version of 16
324
325 /*
326 * State Meaning
327 * -------------------------------------------
328 * | NFSD4_ACTIVE | Confirmed, active
329 * |------------------- ----------------------
330 * | NFSD4_COURTESY | Courtesy state.
331 * | | Lease/lock/share
332 * | | reservation conflict
333 * | | can cause Courtesy
334 * | | client to be expired
335 * |------------------------------------------
336 * | NFSD4_EXPIRABLE | Courtesy client to be
337 * | | expired by Laundromat
338 * | | due to conflict
339 * |------------------------------------------
340 */
341 enum {
342 NFSD4_ACTIVE = 0,
343 NFSD4_COURTESY,
344 NFSD4_EXPIRABLE,
345 };
346
347 /*
348 * struct nfs4_client - one per client. Clien
349 *
350 * The initial object created by an NFS client
351 * or EXCHANGE_ID (for NFSv4.1+). These object
352 * Each nfsd_net_ns object contains a set of t
353 * short and long form clientid. They are hash
354 * per-nfsd_net client_lock spinlock.
355 *
356 * References to it are only held during the p
357 * certain other operations. In their "resting
358 * 0. If they are not renewed within a lease p
359 * destruction by the laundromat.
360 *
361 * These objects can also be destroyed if the
362 * SETCLIENTID or EXCHANGE_ID operations.
363 *
364 * Care is taken *not* to do this however when
365 * refcount.
366 *
367 * o Each nfs4_client is hashed by clientid
368 *
369 * o Each nfs4_clients is also hashed by name
370 * sent by the client to identify itself).
371 *
372 * o cl_perclient list is used to ensure no da
373 * when we expire the nfs4_client
374 */
375 struct nfs4_client {
376 struct list_head cl_idhash;
377 struct rb_node cl_namenode;
378 struct list_head *cl_ownerstr_h
379 struct list_head cl_openowners;
380 struct idr cl_stateids;
381 struct list_head cl_delegations
382 struct list_head cl_revoked;
383 struct list_head cl_lru;
384 #ifdef CONFIG_NFSD_PNFS
385 struct list_head cl_lo_states;
386 #endif
387 struct xdr_netobj cl_name;
388 nfs4_verifier cl_verifier;
389 time64_t cl_time;
390 struct sockaddr_storage cl_addr;
391 bool cl_mach_cred;
392 struct svc_cred cl_cred;
393 clientid_t cl_clientid;
394 nfs4_verifier cl_confirm;
395 u32 cl_minorversio
396 atomic_t cl_admin_revok
397 /* NFSv4.1 client implementation id: *
398 struct xdr_netobj cl_nii_domain;
399 struct xdr_netobj cl_nii_name;
400 struct timespec64 cl_nii_time;
401
402 /* for v4.0 and v4.1 callbacks: */
403 struct nfs4_cb_conn cl_cb_conn;
404 #define NFSD4_CLIENT_CB_UPDATE (0)
405 #define NFSD4_CLIENT_CB_KILL (1)
406 #define NFSD4_CLIENT_STABLE (2)
407 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3)
408 #define NFSD4_CLIENT_CONFIRMED (4)
409 #define NFSD4_CLIENT_UPCALL_LOCK (5)
410 #define NFSD4_CLIENT_CB_FLAG_MASK (1 <<
411 1 <<
412 #define NFSD4_CLIENT_CB_RECALL_ANY (6)
413 unsigned long cl_flags;
414
415 struct workqueue_struct *cl_callback_w
416 const struct cred *cl_cb_cred;
417 struct rpc_clnt *cl_cb_client;
418 u32 cl_cb_ident;
419 #define NFSD4_CB_UP 0
420 #define NFSD4_CB_UNKNOWN 1
421 #define NFSD4_CB_DOWN 2
422 #define NFSD4_CB_FAULT 3
423 int cl_cb_state;
424 struct nfsd4_callback cl_cb_null;
425 struct nfsd4_session *cl_cb_session
426
427 /* for all client information that cal
428 spinlock_t cl_lock;
429
430 /* for nfs41 */
431 struct list_head cl_sessions;
432 struct nfsd4_clid_slot cl_cs_slot;
433 u32 cl_exchange_fl
434 /* number of rpc's in progress over an
435 atomic_t cl_rpc_users;
436 struct nfsdfs_client cl_nfsdfs;
437 struct nfs4_op_map cl_spo_must_al
438
439 /* debugging info directory under nfsd
440 struct dentry *cl_nfsd_dentr
441 /* 'info' file within that directory.
442 * but will remain valid iff cl_nfsd_d
443 */
444 struct dentry *cl_nfsd_info_
445
446 /* for nfs41 callbacks */
447 /* We currently support a single back
448 unsigned long cl_cb_slot_bus
449 struct rpc_wait_queue cl_cb_waitq;
450
451 struct net *net;
452 struct list_head async_copies;
453 spinlock_t async_lock;
454 atomic_t cl_cb_inflight
455
456 unsigned int cl_state;
457 atomic_t cl_delegs_in_r
458
459 struct nfsd4_cb_recall_any *cl_ra
460 time64_t cl_ra_time;
461 struct list_head cl_ra_cblist;
462 };
463
464 /* struct nfs4_client_reset
465 * one per old client. Populates reset_str_has
466 * upon lease reset, or from upcall to state_d
467 * from non-volitile storage) upon reboot.
468 */
469 struct nfs4_client_reclaim {
470 struct list_head cr_strhash;
471 struct nfs4_client *cr_clp;
472 struct xdr_netobj cr_name;
473 struct xdr_netobj cr_princhash;
474 };
475
476 /* A reasonable value for REPLAY_ISIZE was est
477 * The OPEN response, typically the largest, r
478 * 4(status) + 8(stateid) + 20(changeinfo) +
479 * 4(deleg. type) + 8(deleg. stateid) + 4(de
480 * 20(deleg. space limit) + ~32(deleg. ace)
481 */
482
483 #define NFSD4_REPLAY_ISIZE 112
484
485 /*
486 * Replay buffer, where the result of the last
487 * is cached.
488 */
489 struct nfs4_replay {
490 __be32 rp_status;
491 unsigned int rp_buflen;
492 char *rp_buf;
493 struct knfsd_fh rp_openfh;
494 atomic_t rp_locked;
495 char rp_ibuf[NFSD4_
496 };
497
498 struct nfs4_stateowner;
499
500 struct nfs4_stateowner_operations {
501 void (*so_unhash)(struct nfs4_stateown
502 void (*so_free)(struct nfs4_stateowner
503 };
504
505 /*
506 * A core object that represents either an ope
507 * lock owner objects have one of these embedd
508 * other fields common to both owner types are
509 * structures.
510 */
511 struct nfs4_stateowner {
512 struct list_head
513 struct list_head
514 struct nfs4_client
515 const struct nfs4_stateowner_operation
516 /* after increment in nfsd4_bump_seqid
517 * sequence id expected from the clien
518 atomic_t
519 u32
520 struct xdr_netobj
521 struct nfs4_replay
522 bool
523 };
524
525 /*
526 * When a file is opened, the client provides
527 * that indicates the "owner" of that open. Th
528 * References to it are held by each open stat
529 * is a superset of the nfs4_stateowner struct
530 */
531 struct nfs4_openowner {
532 struct nfs4_stateowner oo_owner; /* m
533 struct list_head oo_perclient;
534 /*
535 * We keep around openowners a little
536 * which saves clients from having to
537 * handle close replays if they come s
538 * is a list of such openowners, to be
539 * thread eventually if they remain un
540 */
541 struct list_head oo_close_lru;
542 struct nfs4_ol_stateid *oo_last_closed
543 time64_t oo_time; /* ti
544 #define NFS4_OO_CONFIRMED 1
545 unsigned char oo_flags;
546 };
547
548 /*
549 * Represents a generic "lockowner". Similar t
550 * are held by the lock stateids that are crea
551 * a superset of the nfs4_stateowner struct.
552 */
553 struct nfs4_lockowner {
554 struct nfs4_stateowner lo_owner;
555 struct list_head lo_blocked;
556 };
557
558 static inline struct nfs4_openowner * openowne
559 {
560 return container_of(so, struct nfs4_op
561 }
562
563 static inline struct nfs4_lockowner * lockowne
564 {
565 return container_of(so, struct nfs4_lo
566 }
567
568 /*
569 * Per-client state indicating no. of opens an
570 * on a file from a particular client.'od' sta
571 */
572 struct nfs4_clnt_odstate {
573 struct nfs4_client *co_client;
574 struct nfs4_file *co_file;
575 struct list_head co_perfile;
576 refcount_t co_odcount;
577 };
578
579 /*
580 * nfs4_file: a file opened by some number of
581 *
582 * These objects are global. nfsd keeps one in
583 * filehandle (though it may keep multiple fil
584 * inode can have multiple filehandles associa
585 * (potentially) a many to one relationship be
586 * inode.
587 */
588 struct nfs4_file {
589 refcount_t fi_ref;
590 struct inode * fi_inode;
591 bool fi_aliased;
592 spinlock_t fi_lock;
593 struct rhlist_head fi_rlist;
594 struct list_head fi_stateids;
595 union {
596 struct list_head fi_del
597 struct rcu_head fi_rcu
598 };
599 struct list_head fi_clnt_odstat
600 /* One each for O_RDONLY, O_WRONLY, O_
601 struct nfsd_file *fi_fds[3];
602 /*
603 * Each open or lock stateid contribut
604 * below depending on which bits are s
605 * 1 to fi_access[O_RDONLY] if NFS
606 * + 1 to fi_access[O_WRONLY] if NFS
607 * + 1 to both of the above if NFS4_
608 */
609 atomic_t fi_access[2];
610 u32 fi_share_deny;
611 struct nfsd_file *fi_deleg_file
612 int fi_delegees;
613 struct knfsd_fh fi_fhandle;
614 bool fi_had_conflic
615 #ifdef CONFIG_NFSD_PNFS
616 struct list_head fi_lo_states;
617 atomic_t fi_lo_recalls;
618 #endif
619 };
620
621 /*
622 * A generic struct representing either a open
623 * holds a reference to each of these objects,
624 * reference to their respective stateowners.
625 * released in response to a close or unlock (
626 * or lock stateid) or when the client is bein
627 *
628 * In the case of v4.0 open stateids, these ob
629 * while after close in order to handle CLOSE
630 * reclaimed via a LRU scheme by the laundroma
631 *
632 * This object is a superset of the nfs4_stid.
633 * Better suggestions welcome.
634 */
635 struct nfs4_ol_stateid {
636 struct nfs4_stid st_sti
637 struct list_head st_per
638 struct list_head st_per
639 struct list_head st_loc
640 struct nfs4_stateowner *st_st
641 struct nfs4_clnt_odstate *st_cl
642 /*
643 * These bitmasks use 3 separate bits for READ
644 * comment above bmap_to_share_mode() for expl
645 */
646 unsigned char st_acc
647 unsigned char st_den
648 struct nfs4_ol_stateid *st_op
649 struct mutex st_mut
650 };
651
652 static inline struct nfs4_ol_stateid *openlock
653 {
654 return container_of(s, struct nfs4_ol_
655 }
656
657 struct nfs4_layout_stateid {
658 struct nfs4_stid ls_sti
659 struct list_head ls_per
660 struct list_head ls_per
661 spinlock_t ls_loc
662 struct list_head ls_lay
663 u32 ls_lay
664 struct nfsd_file *ls_fi
665 struct nfsd4_callback ls_rec
666 stateid_t ls_rec
667 bool ls_rec
668 struct mutex ls_mut
669 };
670
671 static inline struct nfs4_layout_stateid *layo
672 {
673 return container_of(s, struct nfs4_lay
674 }
675
676 /* flags for preprocess_seqid_op() */
677 #define RD_STATE 0x00000010
678 #define WR_STATE 0x00000020
679
680 enum nfsd4_cb_op {
681 NFSPROC4_CLNT_CB_NULL = 0,
682 NFSPROC4_CLNT_CB_RECALL,
683 NFSPROC4_CLNT_CB_LAYOUT,
684 NFSPROC4_CLNT_CB_OFFLOAD,
685 NFSPROC4_CLNT_CB_SEQUENCE,
686 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
687 NFSPROC4_CLNT_CB_RECALL_ANY,
688 NFSPROC4_CLNT_CB_GETATTR,
689 };
690
691 /* Returns true iff a is later than b: */
692 static inline bool nfsd4_stateid_generation_af
693 {
694 return (s32)(a->si_generation - b->si_
695 }
696
697 /*
698 * When a client tries to get a lock on a file
699 * on the blocking lock. When the lock becomes
700 * CB_NOTIFY_LOCK to the server.
701 */
702 struct nfsd4_blocked_lock {
703 struct list_head nbl_list;
704 struct list_head nbl_lru;
705 time64_t nbl_time;
706 struct file_lock nbl_lock;
707 struct knfsd_fh nbl_fh;
708 struct nfsd4_callback nbl_cb;
709 struct kref nbl_kref;
710 };
711
712 struct nfsd4_compound_state;
713 struct nfsd_net;
714 struct nfsd4_copy;
715
716 extern __be32 nfs4_preprocess_stateid_op(struc
717 struct nfsd4_compound_state *c
718 stateid_t *stateid, int flags,
719 struct nfs4_stid **cstid);
720 __be32 nfsd4_lookup_stateid(struct nfsd4_compo
721 stateid_t *stateid
722 unsigned short sta
723 struct nfs4_stid *
724 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_
725 void (*sc_fr
726 int nfs4_init_copy_state(struct nfsd_net *nn,
727 void nfs4_free_copy_state(struct nfsd4_copy *c
728 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf
729 struct nfs4_stid *p_st
730 void nfs4_put_stid(struct nfs4_stid *s);
731 void nfs4_inc_and_copy_stateid(stateid_t *dst,
732 void nfs4_remove_reclaim_record(struct nfs4_cl
733 extern void nfs4_release_reclaim(struct nfsd_n
734 extern struct nfs4_client_reclaim *nfsd4_find_
735
736 extern __be32 nfs4_check_open_reclaim(struct n
737 extern void nfsd4_probe_callback(struct nfs4_c
738 extern void nfsd4_probe_callback_sync(struct n
739 extern void nfsd4_change_callback(struct nfs4_
740 extern void nfsd4_init_cb(struct nfsd4_callbac
741 const struct nfsd4_callback_op
742 extern bool nfsd4_run_cb(struct nfsd4_callback
743 extern void nfsd4_shutdown_callback(struct nfs
744 extern void nfsd4_shutdown_copy(struct nfs4_cl
745 extern struct nfs4_client_reclaim *nfs4_client
746 struct xdr_net
747 extern bool nfs4_has_reclaimed_state(struct xd
748
749 void put_nfs4_file(struct nfs4_file *fi);
750 extern void nfs4_put_cpntf_state(struct nfsd_n
751 struct nfs4_c
752 extern __be32 manage_cpntf_state(struct nfsd_n
753 struct nfs4_c
754 struct nfs4_c
755 static inline void get_nfs4_file(struct nfs4_f
756 {
757 refcount_inc(&fi->fi_ref);
758 }
759 struct nfsd_file *find_any_file(struct nfs4_fi
760
761 #ifdef CONFIG_NFSD_V4
762 void nfsd4_revoke_states(struct net *net, stru
763 #else
764 static inline void nfsd4_revoke_states(struct
765 {
766 }
767 #endif
768
769 /* grace period management */
770 void nfsd4_end_grace(struct nfsd_net *nn);
771
772 /* nfs4recover operations */
773 extern int nfsd4_client_tracking_init(struct n
774 extern void nfsd4_client_tracking_exit(struct
775 extern void nfsd4_client_record_create(struct
776 extern void nfsd4_client_record_remove(struct
777 extern int nfsd4_client_record_check(struct nf
778 extern void nfsd4_record_grace_done(struct nfs
779
780 static inline bool try_to_expire_client(struct
781 {
782 cmpxchg(&clp->cl_state, NFSD4_COURTESY
783 return clp->cl_state == NFSD4_EXPIRABL
784 }
785
786 extern __be32 nfsd4_deleg_getattr_conflict(str
787 struct dentry *dentry, bool *f
788 #endif /* NFSD4_STATE_H */
789
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