2 * Copyright (c) 2001 The Regents of the University of Michigan.
5 * Kendrick Smith <kmsmith@umich.edu>
6 * Andy Adamson <andros@umich.edu>
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
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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 *);
85 * A core object that represents a "common" stateid. These are generally
86 * embedded within the different (more specific) stateid objects and contain
87 * fields that are of general use to any stateid.
92 /* A new stateid is added to the cl_stateids idr early before it
93 * is fully initialised. Its sc_type is then zero. After
94 * initialisation the sc_type it set under cl_lock, and then
97 #define SC_TYPE_OPEN BIT(0)
98 #define SC_TYPE_LOCK BIT(1)
99 #define SC_TYPE_DELEG BIT(2)
100 #define SC_TYPE_LAYOUT BIT(3)
101 unsigned short sc_type;
103 /* state_lock protects sc_status for delegation stateids.
104 * ->cl_lock protects sc_status for open and lock stateids.
105 * ->st_mutex also protect sc_status for open stateids.
106 * ->ls_lock protects sc_status for layout stateids.
109 * For an open stateid kept around *only* to process close replays.
110 * For deleg stateid, kept in idr until last reference is dropped.
112 #define SC_STATUS_CLOSED BIT(0)
113 /* For a deleg stateid kept around only to process free_stateid's: */
114 #define SC_STATUS_REVOKED BIT(1)
115 #define SC_STATUS_ADMIN_REVOKED BIT(2)
116 unsigned short sc_status;
118 struct list_head sc_cp_list;
119 stateid_t sc_stateid;
121 struct nfs4_client *sc_client;
122 struct nfs4_file *sc_file;
123 void (*sc_free)(struct nfs4_stid *);
126 /* Keep a list of stateids issued by the COPY_NOTIFY, associate it with the
127 * parent OPEN/LOCK/DELEG stateid.
129 struct nfs4_cpntf_state {
130 copy_stateid_t cp_stateid;
131 struct list_head cp_list; /* per parent nfs4_stid */
132 stateid_t cp_p_stateid; /* copy of parent's stateid */
133 clientid_t cp_p_clid; /* copy of parent's clid */
134 time64_t cpntf_time; /* last time stateid used */
137 struct nfs4_cb_fattr {
138 struct nfsd4_callback ncf_getattr;
142 /* from CB_GETATTR reply */
146 unsigned long ncf_cb_flags;
147 bool ncf_file_modified;
148 u64 ncf_initial_cinfo;
152 /* bits for ncf_cb_flags */
153 #define CB_GETATTR_BUSY 0
156 * Represents a delegation stateid. The nfs4_client holds references to these
157 * and they are put when it is being destroyed or when the delegation is
158 * returned by the client:
160 * o 1 reference as long as a delegation is still in force (taken when it's
161 * alloc'd, put when it's returned or revoked)
163 * o 1 reference as long as a recall rpc is in progress (taken when the lease
164 * is broken, put when the rpc exits)
166 * o 1 more ephemeral reference for each nfsd thread currently doing something
167 * with that delegation without holding the cl_lock
169 * If the server attempts to recall a delegation and the client doesn't do so
170 * before a timeout, the server may also revoke the delegation. In that case,
171 * the object will either be destroyed (v4.0) or moved to a per-client list of
172 * revoked delegations (v4.1+).
174 * This object is a superset of the nfs4_stid.
176 struct nfs4_delegation {
177 struct nfs4_stid dl_stid; /* must be first field */
178 struct list_head dl_perfile;
179 struct list_head dl_perclnt;
180 struct list_head dl_recall_lru; /* delegation recalled */
181 struct nfs4_clnt_odstate *dl_clnt_odstate;
186 struct nfsd4_callback dl_recall;
190 struct nfs4_cb_fattr dl_cb_fattr;
193 #define cb_to_delegation(cb) \
194 container_of(cb, struct nfs4_delegation, dl_recall)
196 /* client delegation callback info */
197 struct nfs4_cb_conn {
198 /* SETCLIENTID info */
199 struct sockaddr_storage cb_addr;
200 struct sockaddr_storage cb_saddr;
202 u32 cb_prog; /* used only in 4.0 case;
203 per-session otherwise */
204 u32 cb_ident; /* minorversion 0 only */
205 struct svc_xprt *cb_xprt; /* minorversion 1 only */
208 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
210 return container_of(s, struct nfs4_delegation, dl_stid);
213 /* Maximum number of slots per session. 160 is useful for long haul TCP */
214 #define NFSD_MAX_SLOTS_PER_SESSION 160
215 /* Maximum session per slot cache size */
216 #define NFSD_SLOT_CACHE_SIZE 2048
217 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
218 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
219 #define NFSD_MAX_MEM_PER_SESSION \
220 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
225 struct svc_cred sl_cred;
228 #define NFSD4_SLOT_INUSE (1 << 0)
229 #define NFSD4_SLOT_CACHETHIS (1 << 1)
230 #define NFSD4_SLOT_INITIALIZED (1 << 2)
231 #define NFSD4_SLOT_CACHED (1 << 3)
236 struct nfsd4_channel_attrs {
247 struct nfsd4_cb_sec {
248 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
253 struct nfsd4_create_session {
255 struct nfs4_sessionid sessionid;
258 struct nfsd4_channel_attrs fore_channel;
259 struct nfsd4_channel_attrs back_channel;
261 struct nfsd4_cb_sec cb_sec;
264 struct nfsd4_backchannel_ctl {
266 struct nfsd4_cb_sec bc_cb_sec;
269 struct nfsd4_bind_conn_to_session {
270 struct nfs4_sessionid sessionid;
274 /* The single slot clientid cache structure */
275 struct nfsd4_clid_slot {
278 struct nfsd4_create_session sl_cr_ses;
282 struct list_head cn_persession;
283 struct svc_xprt *cn_xprt;
284 struct svc_xpt_user cn_xpt_user;
285 struct nfsd4_session *cn_session;
286 /* CDFC4_FORE, CDFC4_BACK: */
287 unsigned char cn_flags;
291 * Representation of a v4.1+ session. These are refcounted in a similar fashion
292 * to the nfs4_client. References are only taken when the server is actively
293 * working on the object (primarily during the processing of compounds).
295 struct nfsd4_session {
297 struct list_head se_hash; /* hash by sessionid */
298 struct list_head se_perclnt;
299 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
300 #define NFS4_SESSION_DEAD 0x010
302 struct nfs4_client *se_client;
303 struct nfs4_sessionid se_sessionid;
304 struct nfsd4_channel_attrs se_fchannel;
305 struct nfsd4_channel_attrs se_bchannel;
306 struct nfsd4_cb_sec se_cb_sec;
307 struct list_head se_conns;
310 struct nfsd4_slot *se_slots[]; /* forward channel slots */
313 /* formatted contents of nfs4_sessionid */
314 struct nfsd4_sessionid {
320 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
323 * State Meaning Where set
324 * --------------------------------------------------------------------------
325 * | NFSD4_ACTIVE | Confirmed, active | Default |
326 * |------------------- ----------------------------------------------------|
327 * | NFSD4_COURTESY | Courtesy state. | nfs4_get_client_reaplist |
328 * | | Lease/lock/share | |
329 * | | reservation conflict | |
330 * | | can cause Courtesy | |
331 * | | client to be expired | |
332 * |------------------------------------------------------------------------|
333 * | NFSD4_EXPIRABLE | Courtesy client to be| nfs4_laundromat |
334 * | | expired by Laundromat| try_to_expire_client |
335 * | | due to conflict | |
336 * |------------------------------------------------------------------------|
345 * struct nfs4_client - one per client. Clientids live here.
347 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
348 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
349 * Each nfsd_net_ns object contains a set of these and they are tracked via
350 * short and long form clientid. They are hashed and searched for under the
351 * per-nfsd_net client_lock spinlock.
353 * References to it are only held during the processing of compounds, and in
354 * certain other operations. In their "resting state" they have a refcount of
355 * 0. If they are not renewed within a lease period, they become eligible for
356 * destruction by the laundromat.
358 * These objects can also be destroyed if the client sends certain forms of
359 * SETCLIENTID or EXCHANGE_ID operations.
361 * Care is taken *not* to do this however when the objects have an elevated
364 * o Each nfs4_client is hashed by clientid
366 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
367 * sent by the client to identify itself).
369 * o cl_perclient list is used to ensure no dangling stateowner references
370 * when we expire the nfs4_client
373 struct list_head cl_idhash; /* hash by cl_clientid.id */
374 struct rb_node cl_namenode; /* link into by-name trees */
375 struct list_head *cl_ownerstr_hashtbl;
376 struct list_head cl_openowners;
377 struct idr cl_stateids; /* stateid lookup */
378 struct list_head cl_delegations;
379 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
380 struct list_head cl_lru; /* tail queue */
381 #ifdef CONFIG_NFSD_PNFS
382 struct list_head cl_lo_states; /* outstanding layout states */
384 struct xdr_netobj cl_name; /* id generated by client */
385 nfs4_verifier cl_verifier; /* generated by client */
386 time64_t cl_time; /* time of last lease renewal */
387 struct sockaddr_storage cl_addr; /* client ipaddress */
388 bool cl_mach_cred; /* SP4_MACH_CRED in force */
389 struct svc_cred cl_cred; /* setclientid principal */
390 clientid_t cl_clientid; /* generated by server */
391 nfs4_verifier cl_confirm; /* generated by server */
393 atomic_t cl_admin_revoked; /* count of admin-revoked states */
394 /* NFSv4.1 client implementation id: */
395 struct xdr_netobj cl_nii_domain;
396 struct xdr_netobj cl_nii_name;
397 struct timespec64 cl_nii_time;
399 /* for v4.0 and v4.1 callbacks: */
400 struct nfs4_cb_conn cl_cb_conn;
401 #define NFSD4_CLIENT_CB_UPDATE (0)
402 #define NFSD4_CLIENT_CB_KILL (1)
403 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
404 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
405 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
406 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
407 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
408 1 << NFSD4_CLIENT_CB_KILL)
409 #define NFSD4_CLIENT_CB_RECALL_ANY (6)
410 unsigned long cl_flags;
411 const struct cred *cl_cb_cred;
412 struct rpc_clnt *cl_cb_client;
414 #define NFSD4_CB_UP 0
415 #define NFSD4_CB_UNKNOWN 1
416 #define NFSD4_CB_DOWN 2
417 #define NFSD4_CB_FAULT 3
419 struct nfsd4_callback cl_cb_null;
420 struct nfsd4_session *cl_cb_session;
422 /* for all client information that callback code might need: */
426 struct list_head cl_sessions;
427 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
428 u32 cl_exchange_flags;
429 /* number of rpc's in progress over an associated session: */
430 atomic_t cl_rpc_users;
431 struct nfsdfs_client cl_nfsdfs;
432 struct nfs4_op_map cl_spo_must_allow;
434 /* debugging info directory under nfsd/clients/ : */
435 struct dentry *cl_nfsd_dentry;
436 /* 'info' file within that directory. Ref is not counted,
437 * but will remain valid iff cl_nfsd_dentry != NULL
439 struct dentry *cl_nfsd_info_dentry;
441 /* for nfs41 callbacks */
442 /* We currently support a single back channel with a single slot */
443 unsigned long cl_cb_slot_busy;
444 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
445 /* wait here for slots */
447 struct list_head async_copies; /* list of async copies */
448 spinlock_t async_lock; /* lock for async copies */
449 atomic_t cl_cb_inflight; /* Outstanding callbacks */
451 unsigned int cl_state;
452 atomic_t cl_delegs_in_recall;
454 struct nfsd4_cb_recall_any *cl_ra;
456 struct list_head cl_ra_cblist;
459 /* struct nfs4_client_reset
460 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
461 * upon lease reset, or from upcall to state_daemon (to read in state
462 * from non-volitile storage) upon reboot.
464 struct nfs4_client_reclaim {
465 struct list_head cr_strhash; /* hash by cr_name */
466 struct nfs4_client *cr_clp; /* pointer to associated clp */
467 struct xdr_netobj cr_name; /* recovery dir name */
468 struct xdr_netobj cr_princhash;
471 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
472 * The OPEN response, typically the largest, requires
473 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
474 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
475 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
478 #define NFSD4_REPLAY_ISIZE 112
481 * Replay buffer, where the result of the last seqid-mutating operation
486 unsigned int rp_buflen;
488 struct knfsd_fh rp_openfh;
489 struct mutex rp_mutex;
490 char rp_ibuf[NFSD4_REPLAY_ISIZE];
493 struct nfs4_stateowner;
495 struct nfs4_stateowner_operations {
496 void (*so_unhash)(struct nfs4_stateowner *);
497 void (*so_free)(struct nfs4_stateowner *);
501 * A core object that represents either an open or lock owner. The object and
502 * lock owner objects have one of these embedded within them. Refcounts and
503 * other fields common to both owner types are contained within these
506 struct nfs4_stateowner {
507 struct list_head so_strhash;
508 struct list_head so_stateids;
509 struct nfs4_client *so_client;
510 const struct nfs4_stateowner_operations *so_ops;
511 /* after increment in nfsd4_bump_seqid, represents the next
512 * sequence id expected from the client: */
515 struct xdr_netobj so_owner; /* open owner name */
516 struct nfs4_replay so_replay;
517 bool so_is_open_owner;
521 * When a file is opened, the client provides an open state owner opaque string
522 * that indicates the "owner" of that open. These objects are refcounted.
523 * References to it are held by each open state associated with it. This object
524 * is a superset of the nfs4_stateowner struct.
526 struct nfs4_openowner {
527 struct nfs4_stateowner oo_owner; /* must be first field */
528 struct list_head oo_perclient;
530 * We keep around openowners a little while after last close,
531 * which saves clients from having to confirm, and allows us to
532 * handle close replays if they come soon enough. The close_lru
533 * is a list of such openowners, to be reaped by the laundromat
534 * thread eventually if they remain unused:
536 struct list_head oo_close_lru;
537 struct nfs4_ol_stateid *oo_last_closed_stid;
538 time64_t oo_time; /* time of placement on so_close_lru */
539 #define NFS4_OO_CONFIRMED 1
540 unsigned char oo_flags;
544 * Represents a generic "lockowner". Similar to an openowner. References to it
545 * are held by the lock stateids that are created on its behalf. This object is
546 * a superset of the nfs4_stateowner struct.
548 struct nfs4_lockowner {
549 struct nfs4_stateowner lo_owner; /* must be first element */
550 struct list_head lo_blocked; /* blocked file_locks */
553 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
555 return container_of(so, struct nfs4_openowner, oo_owner);
558 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
560 return container_of(so, struct nfs4_lockowner, lo_owner);
564 * Per-client state indicating no. of opens and outstanding delegations
565 * on a file from a particular client.'od' stands for 'open & delegation'
567 struct nfs4_clnt_odstate {
568 struct nfs4_client *co_client;
569 struct nfs4_file *co_file;
570 struct list_head co_perfile;
571 refcount_t co_odcount;
575 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
577 * These objects are global. nfsd keeps one instance of a nfs4_file per
578 * filehandle (though it may keep multiple file descriptors for each). Each
579 * inode can have multiple filehandles associated with it, so there is
580 * (potentially) a many to one relationship between this struct and struct
585 struct inode * fi_inode;
588 struct rhlist_head fi_rlist;
589 struct list_head fi_stateids;
591 struct list_head fi_delegations;
592 struct rcu_head fi_rcu;
594 struct list_head fi_clnt_odstate;
595 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
596 struct nfsd_file *fi_fds[3];
598 * Each open or lock stateid contributes 0-4 to the counts
599 * below depending on which bits are set in st_access_bitmap:
600 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
601 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
602 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
604 atomic_t fi_access[2];
606 struct nfsd_file *fi_deleg_file;
608 struct knfsd_fh fi_fhandle;
609 bool fi_had_conflict;
610 #ifdef CONFIG_NFSD_PNFS
611 struct list_head fi_lo_states;
612 atomic_t fi_lo_recalls;
617 * A generic struct representing either a open or lock stateid. The nfs4_client
618 * holds a reference to each of these objects, and they in turn hold a
619 * reference to their respective stateowners. The client's reference is
620 * released in response to a close or unlock (depending on whether it's an open
621 * or lock stateid) or when the client is being destroyed.
623 * In the case of v4.0 open stateids, these objects are preserved for a little
624 * while after close in order to handle CLOSE replays. Those are eventually
625 * reclaimed via a LRU scheme by the laundromat.
627 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
628 * Better suggestions welcome.
630 struct nfs4_ol_stateid {
631 struct nfs4_stid st_stid;
632 struct list_head st_perfile;
633 struct list_head st_perstateowner;
634 struct list_head st_locks;
635 struct nfs4_stateowner *st_stateowner;
636 struct nfs4_clnt_odstate *st_clnt_odstate;
638 * These bitmasks use 3 separate bits for READ, ALLOW, and BOTH; see the
639 * comment above bmap_to_share_mode() for explanation:
641 unsigned char st_access_bmap;
642 unsigned char st_deny_bmap;
643 struct nfs4_ol_stateid *st_openstp;
644 struct mutex st_mutex;
647 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
649 return container_of(s, struct nfs4_ol_stateid, st_stid);
652 struct nfs4_layout_stateid {
653 struct nfs4_stid ls_stid;
654 struct list_head ls_perclnt;
655 struct list_head ls_perfile;
657 struct list_head ls_layouts;
659 struct nfsd_file *ls_file;
660 struct nfsd4_callback ls_recall;
661 stateid_t ls_recall_sid;
663 struct mutex ls_mutex;
666 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
668 return container_of(s, struct nfs4_layout_stateid, ls_stid);
671 /* flags for preprocess_seqid_op() */
672 #define RD_STATE 0x00000010
673 #define WR_STATE 0x00000020
676 NFSPROC4_CLNT_CB_NULL = 0,
677 NFSPROC4_CLNT_CB_RECALL,
678 NFSPROC4_CLNT_CB_LAYOUT,
679 NFSPROC4_CLNT_CB_OFFLOAD,
680 NFSPROC4_CLNT_CB_SEQUENCE,
681 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
682 NFSPROC4_CLNT_CB_RECALL_ANY,
683 NFSPROC4_CLNT_CB_GETATTR,
686 /* Returns true iff a is later than b: */
687 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
689 return (s32)(a->si_generation - b->si_generation) > 0;
693 * When a client tries to get a lock on a file, we set one of these objects
694 * on the blocking lock. When the lock becomes free, we can then issue a
695 * CB_NOTIFY_LOCK to the server.
697 struct nfsd4_blocked_lock {
698 struct list_head nbl_list;
699 struct list_head nbl_lru;
701 struct file_lock nbl_lock;
702 struct knfsd_fh nbl_fh;
703 struct nfsd4_callback nbl_cb;
704 struct kref nbl_kref;
707 struct nfsd4_compound_state;
711 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
712 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
713 stateid_t *stateid, int flags, struct nfsd_file **filp,
714 struct nfs4_stid **cstid);
715 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
716 stateid_t *stateid, unsigned short typemask,
717 unsigned short statusmask,
718 struct nfs4_stid **s, struct nfsd_net *nn);
719 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
720 void (*sc_free)(struct nfs4_stid *));
721 int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
722 void nfs4_free_copy_state(struct nfsd4_copy *copy);
723 struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
724 struct nfs4_stid *p_stid);
725 void nfs4_put_stid(struct nfs4_stid *s);
726 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
727 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
728 extern void nfs4_release_reclaim(struct nfsd_net *);
729 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
730 struct nfsd_net *nn);
731 extern __be32 nfs4_check_open_reclaim(struct nfs4_client *);
732 extern void nfsd4_probe_callback(struct nfs4_client *clp);
733 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
734 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
735 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
736 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
737 extern bool nfsd4_run_cb(struct nfsd4_callback *cb);
738 extern int nfsd4_create_callback_queue(void);
739 extern void nfsd4_destroy_callback_queue(void);
740 extern void nfsd4_shutdown_callback(struct nfs4_client *);
741 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
742 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
743 struct xdr_netobj princhash, struct nfsd_net *nn);
744 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
746 void put_nfs4_file(struct nfs4_file *fi);
747 extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
748 struct nfs4_cpntf_state *cps);
749 extern __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
750 struct nfs4_client *clp,
751 struct nfs4_cpntf_state **cps);
752 static inline void get_nfs4_file(struct nfs4_file *fi)
754 refcount_inc(&fi->fi_ref);
756 struct nfsd_file *find_any_file(struct nfs4_file *f);
758 #ifdef CONFIG_NFSD_V4
759 void nfsd4_revoke_states(struct net *net, struct super_block *sb);
761 static inline void nfsd4_revoke_states(struct net *net, struct super_block *sb)
766 /* grace period management */
767 void nfsd4_end_grace(struct nfsd_net *nn);
769 /* nfs4recover operations */
770 extern int nfsd4_client_tracking_init(struct net *net);
771 extern void nfsd4_client_tracking_exit(struct net *net);
772 extern void nfsd4_client_record_create(struct nfs4_client *clp);
773 extern void nfsd4_client_record_remove(struct nfs4_client *clp);
774 extern int nfsd4_client_record_check(struct nfs4_client *clp);
775 extern void nfsd4_record_grace_done(struct nfsd_net *nn);
777 static inline bool try_to_expire_client(struct nfs4_client *clp)
779 cmpxchg(&clp->cl_state, NFSD4_COURTESY, NFSD4_EXPIRABLE);
780 return clp->cl_state == NFSD4_EXPIRABLE;
783 extern __be32 nfsd4_deleg_getattr_conflict(struct svc_rqst *rqstp,
784 struct inode *inode, bool *file_modified, u64 *size);
785 #endif /* NFSD4_STATE_H */