1 /*
2 * Copyright (c) 2001 The Regents of the University of Michigan.
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 binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 *
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.
20 *
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.
32 *
33 */
34
35 #ifndef _NFSD4_STATE_H
36 #define _NFSD4_STATE_H
37
38 #include <linux/idr.h>
39 #include <linux/sunrpc/svc_xprt.h>
40 #include "nfsfh.h"
41
42 typedef struct {
43 u32 cl_boot;
44 u32 cl_id;
45 } clientid_t;
46
47 typedef struct {
48 clientid_t so_clid;
49 u32 so_id;
50 } stateid_opaque_t;
51
52 typedef struct {
53 u32 si_generation;
54 stateid_opaque_t si_opaque;
55 } stateid_t;
56
57 #define STATEID_FMT "(%08x/%08x/%08x/%08x)"
58 #define STATEID_VAL(s) \
59 (s)->si_opaque.so_clid.cl_boot, \
60 (s)->si_opaque.so_clid.cl_id, \
61 (s)->si_opaque.so_id, \
62 (s)->si_generation
63
64 struct nfsd4_callback {
65 struct nfs4_client *cb_clp;
66 u32 cb_minorversion;
67 struct rpc_message cb_msg;
68 struct nfsd4_callback_ops *cb_ops;
69 struct work_struct cb_work;
70 int cb_seq_status;
71 int cb_status;
72 bool cb_need_restart;
73 bool cb_holds_slot;
74 };
75
76 struct nfsd4_callback_ops {
77 void (*prepare)(struct nfsd4_callback *);
78 int (*done)(struct nfsd4_callback *, struct rpc_task *);
79 void (*release)(struct nfsd4_callback *);
80 };
81
82 /*
83 * A core object that represents a "common" stateid. These are generally
84 * embedded within the different (more specific) stateid objects and contain
85 * fields that are of general use to any stateid.
86 */
87 struct nfs4_stid {
88 atomic_t sc_count;
89 #define NFS4_OPEN_STID 1
90 #define NFS4_LOCK_STID 2
91 #define NFS4_DELEG_STID 4
92 /* For an open stateid kept around *only* to process close replays: */
93 #define NFS4_CLOSED_STID 8
94 /* For a deleg stateid kept around only to process free_stateid's: */
95 #define NFS4_REVOKED_DELEG_STID 16
96 #define NFS4_CLOSED_DELEG_STID 32
97 #define NFS4_LAYOUT_STID 64
98 unsigned char sc_type;
99 stateid_t sc_stateid;
100 spinlock_t sc_lock;
101 struct nfs4_client *sc_client;
102 struct nfs4_file *sc_file;
103 void (*sc_free)(struct nfs4_stid *);
104 };
105
106 /*
107 * Represents a delegation stateid. The nfs4_client holds references to these
108 * and they are put when it is being destroyed or when the delegation is
109 * returned by the client:
110 *
111 * o 1 reference as long as a delegation is still in force (taken when it's
112 * alloc'd, put when it's returned or revoked)
113 *
114 * o 1 reference as long as a recall rpc is in progress (taken when the lease
115 * is broken, put when the rpc exits)
116 *
117 * o 1 more ephemeral reference for each nfsd thread currently doing something
118 * with that delegation without holding the cl_lock
119 *
120 * If the server attempts to recall a delegation and the client doesn't do so
121 * before a timeout, the server may also revoke the delegation. In that case,
122 * the object will either be destroyed (v4.0) or moved to a per-client list of
123 * revoked delegations (v4.1+).
124 *
125 * This object is a superset of the nfs4_stid.
126 */
127 struct nfs4_delegation {
128 struct nfs4_stid dl_stid; /* must be first field */
129 struct list_head dl_perfile;
130 struct list_head dl_perclnt;
131 struct list_head dl_recall_lru; /* delegation recalled */
132 struct nfs4_clnt_odstate *dl_clnt_odstate;
133 u32 dl_type;
134 time_t dl_time;
135 /* For recall: */
136 int dl_retries;
137 struct nfsd4_callback dl_recall;
138 };
139
140 #define cb_to_delegation(cb) \
141 container_of(cb, struct nfs4_delegation, dl_recall)
142
143 /* client delegation callback info */
144 struct nfs4_cb_conn {
145 /* SETCLIENTID info */
146 struct sockaddr_storage cb_addr;
147 struct sockaddr_storage cb_saddr;
148 size_t cb_addrlen;
149 u32 cb_prog; /* used only in 4.0 case;
150 per-session otherwise */
151 u32 cb_ident; /* minorversion 0 only */
152 struct svc_xprt *cb_xprt; /* minorversion 1 only */
153 };
154
delegstateid(struct nfs4_stid * s)155 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
156 {
157 return container_of(s, struct nfs4_delegation, dl_stid);
158 }
159
160 /* Maximum number of slots per session. 160 is useful for long haul TCP */
161 #define NFSD_MAX_SLOTS_PER_SESSION 160
162 /* Maximum number of operations per session compound */
163 #define NFSD_MAX_OPS_PER_COMPOUND 16
164 /* Maximum session per slot cache size */
165 #define NFSD_SLOT_CACHE_SIZE 2048
166 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
167 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
168 #define NFSD_MAX_MEM_PER_SESSION \
169 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
170
171 struct nfsd4_slot {
172 u32 sl_seqid;
173 __be32 sl_status;
174 u32 sl_datalen;
175 u16 sl_opcnt;
176 #define NFSD4_SLOT_INUSE (1 << 0)
177 #define NFSD4_SLOT_CACHETHIS (1 << 1)
178 #define NFSD4_SLOT_INITIALIZED (1 << 2)
179 u8 sl_flags;
180 char sl_data[];
181 };
182
183 struct nfsd4_channel_attrs {
184 u32 headerpadsz;
185 u32 maxreq_sz;
186 u32 maxresp_sz;
187 u32 maxresp_cached;
188 u32 maxops;
189 u32 maxreqs;
190 u32 nr_rdma_attrs;
191 u32 rdma_attrs;
192 };
193
194 struct nfsd4_cb_sec {
195 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
196 kuid_t uid;
197 kgid_t gid;
198 };
199
200 struct nfsd4_create_session {
201 clientid_t clientid;
202 struct nfs4_sessionid sessionid;
203 u32 seqid;
204 u32 flags;
205 struct nfsd4_channel_attrs fore_channel;
206 struct nfsd4_channel_attrs back_channel;
207 u32 callback_prog;
208 struct nfsd4_cb_sec cb_sec;
209 };
210
211 struct nfsd4_backchannel_ctl {
212 u32 bc_cb_program;
213 struct nfsd4_cb_sec bc_cb_sec;
214 };
215
216 struct nfsd4_bind_conn_to_session {
217 struct nfs4_sessionid sessionid;
218 u32 dir;
219 };
220
221 /* The single slot clientid cache structure */
222 struct nfsd4_clid_slot {
223 u32 sl_seqid;
224 __be32 sl_status;
225 struct nfsd4_create_session sl_cr_ses;
226 };
227
228 struct nfsd4_conn {
229 struct list_head cn_persession;
230 struct svc_xprt *cn_xprt;
231 struct svc_xpt_user cn_xpt_user;
232 struct nfsd4_session *cn_session;
233 /* CDFC4_FORE, CDFC4_BACK: */
234 unsigned char cn_flags;
235 };
236
237 /*
238 * Representation of a v4.1+ session. These are refcounted in a similar fashion
239 * to the nfs4_client. References are only taken when the server is actively
240 * working on the object (primarily during the processing of compounds).
241 */
242 struct nfsd4_session {
243 atomic_t se_ref;
244 struct list_head se_hash; /* hash by sessionid */
245 struct list_head se_perclnt;
246 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
247 #define NFS4_SESSION_DEAD 0x010
248 u32 se_flags;
249 struct nfs4_client *se_client;
250 struct nfs4_sessionid se_sessionid;
251 struct nfsd4_channel_attrs se_fchannel;
252 struct nfsd4_channel_attrs se_bchannel;
253 struct nfsd4_cb_sec se_cb_sec;
254 struct list_head se_conns;
255 u32 se_cb_prog;
256 u32 se_cb_seq_nr;
257 struct nfsd4_slot *se_slots[]; /* forward channel slots */
258 };
259
260 /* formatted contents of nfs4_sessionid */
261 struct nfsd4_sessionid {
262 clientid_t clientid;
263 u32 sequence;
264 u32 reserved;
265 };
266
267 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
268
269 /*
270 * struct nfs4_client - one per client. Clientids live here.
271 *
272 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
273 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
274 * Each nfsd_net_ns object contains a set of these and they are tracked via
275 * short and long form clientid. They are hashed and searched for under the
276 * per-nfsd_net client_lock spinlock.
277 *
278 * References to it are only held during the processing of compounds, and in
279 * certain other operations. In their "resting state" they have a refcount of
280 * 0. If they are not renewed within a lease period, they become eligible for
281 * destruction by the laundromat.
282 *
283 * These objects can also be destroyed prematurely by the fault injection code,
284 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates.
285 * Care is taken *not* to do this however when the objects have an elevated
286 * refcount.
287 *
288 * o Each nfs4_client is hashed by clientid
289 *
290 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
291 * sent by the client to identify itself).
292 *
293 * o cl_perclient list is used to ensure no dangling stateowner references
294 * when we expire the nfs4_client
295 */
296 struct nfs4_client {
297 struct list_head cl_idhash; /* hash by cl_clientid.id */
298 struct rb_node cl_namenode; /* link into by-name trees */
299 struct list_head *cl_ownerstr_hashtbl;
300 struct list_head cl_openowners;
301 struct idr cl_stateids; /* stateid lookup */
302 struct list_head cl_delegations;
303 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
304 struct list_head cl_lru; /* tail queue */
305 #ifdef CONFIG_NFSD_PNFS
306 struct list_head cl_lo_states; /* outstanding layout states */
307 #endif
308 struct xdr_netobj cl_name; /* id generated by client */
309 nfs4_verifier cl_verifier; /* generated by client */
310 time_t cl_time; /* time of last lease renewal */
311 struct sockaddr_storage cl_addr; /* client ipaddress */
312 bool cl_mach_cred; /* SP4_MACH_CRED in force */
313 struct svc_cred cl_cred; /* setclientid principal */
314 clientid_t cl_clientid; /* generated by server */
315 nfs4_verifier cl_confirm; /* generated by server */
316 u32 cl_minorversion;
317
318 /* for v4.0 and v4.1 callbacks: */
319 struct nfs4_cb_conn cl_cb_conn;
320 #define NFSD4_CLIENT_CB_UPDATE (0)
321 #define NFSD4_CLIENT_CB_KILL (1)
322 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
323 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
324 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
325 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
326 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
327 1 << NFSD4_CLIENT_CB_KILL)
328 unsigned long cl_flags;
329 struct rpc_cred *cl_cb_cred;
330 struct rpc_clnt *cl_cb_client;
331 u32 cl_cb_ident;
332 #define NFSD4_CB_UP 0
333 #define NFSD4_CB_UNKNOWN 1
334 #define NFSD4_CB_DOWN 2
335 #define NFSD4_CB_FAULT 3
336 int cl_cb_state;
337 struct nfsd4_callback cl_cb_null;
338 struct nfsd4_session *cl_cb_session;
339
340 /* for all client information that callback code might need: */
341 spinlock_t cl_lock;
342
343 /* for nfs41 */
344 struct list_head cl_sessions;
345 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
346 u32 cl_exchange_flags;
347 /* number of rpc's in progress over an associated session: */
348 atomic_t cl_refcount;
349
350 /* for nfs41 callbacks */
351 /* We currently support a single back channel with a single slot */
352 unsigned long cl_cb_slot_busy;
353 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
354 /* wait here for slots */
355 struct net *net;
356 };
357
358 /* struct nfs4_client_reset
359 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
360 * upon lease reset, or from upcall to state_daemon (to read in state
361 * from non-volitile storage) upon reboot.
362 */
363 struct nfs4_client_reclaim {
364 struct list_head cr_strhash; /* hash by cr_name */
365 struct nfs4_client *cr_clp; /* pointer to associated clp */
366 char cr_recdir[HEXDIR_LEN]; /* recover dir */
367 };
368
369 /* A reasonable value for REPLAY_ISIZE was estimated as follows:
370 * The OPEN response, typically the largest, requires
371 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
372 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
373 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
374 */
375
376 #define NFSD4_REPLAY_ISIZE 112
377
378 /*
379 * Replay buffer, where the result of the last seqid-mutating operation
380 * is cached.
381 */
382 struct nfs4_replay {
383 __be32 rp_status;
384 unsigned int rp_buflen;
385 char *rp_buf;
386 struct knfsd_fh rp_openfh;
387 struct mutex rp_mutex;
388 char rp_ibuf[NFSD4_REPLAY_ISIZE];
389 };
390
391 struct nfs4_stateowner;
392
393 struct nfs4_stateowner_operations {
394 void (*so_unhash)(struct nfs4_stateowner *);
395 void (*so_free)(struct nfs4_stateowner *);
396 };
397
398 /*
399 * A core object that represents either an open or lock owner. The object and
400 * lock owner objects have one of these embedded within them. Refcounts and
401 * other fields common to both owner types are contained within these
402 * structures.
403 */
404 struct nfs4_stateowner {
405 struct list_head so_strhash;
406 struct list_head so_stateids;
407 struct nfs4_client *so_client;
408 const struct nfs4_stateowner_operations *so_ops;
409 /* after increment in nfsd4_bump_seqid, represents the next
410 * sequence id expected from the client: */
411 atomic_t so_count;
412 u32 so_seqid;
413 struct xdr_netobj so_owner; /* open owner name */
414 struct nfs4_replay so_replay;
415 bool so_is_open_owner;
416 };
417
418 /*
419 * When a file is opened, the client provides an open state owner opaque string
420 * that indicates the "owner" of that open. These objects are refcounted.
421 * References to it are held by each open state associated with it. This object
422 * is a superset of the nfs4_stateowner struct.
423 */
424 struct nfs4_openowner {
425 struct nfs4_stateowner oo_owner; /* must be first field */
426 struct list_head oo_perclient;
427 /*
428 * We keep around openowners a little while after last close,
429 * which saves clients from having to confirm, and allows us to
430 * handle close replays if they come soon enough. The close_lru
431 * is a list of such openowners, to be reaped by the laundromat
432 * thread eventually if they remain unused:
433 */
434 struct list_head oo_close_lru;
435 struct nfs4_ol_stateid *oo_last_closed_stid;
436 time_t oo_time; /* time of placement on so_close_lru */
437 #define NFS4_OO_CONFIRMED 1
438 unsigned char oo_flags;
439 };
440
441 /*
442 * Represents a generic "lockowner". Similar to an openowner. References to it
443 * are held by the lock stateids that are created on its behalf. This object is
444 * a superset of the nfs4_stateowner struct (or would be if it needed any extra
445 * fields).
446 */
447 struct nfs4_lockowner {
448 struct nfs4_stateowner lo_owner; /* must be first element */
449 };
450
openowner(struct nfs4_stateowner * so)451 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
452 {
453 return container_of(so, struct nfs4_openowner, oo_owner);
454 }
455
lockowner(struct nfs4_stateowner * so)456 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
457 {
458 return container_of(so, struct nfs4_lockowner, lo_owner);
459 }
460
461 /*
462 * Per-client state indicating no. of opens and outstanding delegations
463 * on a file from a particular client.'od' stands for 'open & delegation'
464 */
465 struct nfs4_clnt_odstate {
466 struct nfs4_client *co_client;
467 struct nfs4_file *co_file;
468 struct list_head co_perfile;
469 atomic_t co_odcount;
470 };
471
472 /*
473 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
474 *
475 * These objects are global. nfsd keeps one instance of a nfs4_file per
476 * filehandle (though it may keep multiple file descriptors for each). Each
477 * inode can have multiple filehandles associated with it, so there is
478 * (potentially) a many to one relationship between this struct and struct
479 * inode.
480 *
481 * These are hashed by filehandle in the file_hashtbl, which is protected by
482 * the global state_lock spinlock.
483 */
484 struct nfs4_file {
485 atomic_t fi_ref;
486 spinlock_t fi_lock;
487 struct hlist_node fi_hash; /* hash on fi_fhandle */
488 struct list_head fi_stateids;
489 union {
490 struct list_head fi_delegations;
491 struct rcu_head fi_rcu;
492 };
493 struct list_head fi_clnt_odstate;
494 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
495 struct file * fi_fds[3];
496 /*
497 * Each open or lock stateid contributes 0-4 to the counts
498 * below depending on which bits are set in st_access_bitmap:
499 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
500 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
501 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
502 */
503 atomic_t fi_access[2];
504 u32 fi_share_deny;
505 struct file *fi_deleg_file;
506 int fi_delegees;
507 struct knfsd_fh fi_fhandle;
508 bool fi_had_conflict;
509 #ifdef CONFIG_NFSD_PNFS
510 struct list_head fi_lo_states;
511 atomic_t fi_lo_recalls;
512 #endif
513 };
514
515 /*
516 * A generic struct representing either a open or lock stateid. The nfs4_client
517 * holds a reference to each of these objects, and they in turn hold a
518 * reference to their respective stateowners. The client's reference is
519 * released in response to a close or unlock (depending on whether it's an open
520 * or lock stateid) or when the client is being destroyed.
521 *
522 * In the case of v4.0 open stateids, these objects are preserved for a little
523 * while after close in order to handle CLOSE replays. Those are eventually
524 * reclaimed via a LRU scheme by the laundromat.
525 *
526 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
527 * Better suggestions welcome.
528 */
529 struct nfs4_ol_stateid {
530 struct nfs4_stid st_stid;
531 struct list_head st_perfile;
532 struct list_head st_perstateowner;
533 struct list_head st_locks;
534 struct nfs4_stateowner *st_stateowner;
535 struct nfs4_clnt_odstate *st_clnt_odstate;
536 unsigned char st_access_bmap;
537 unsigned char st_deny_bmap;
538 struct nfs4_ol_stateid *st_openstp;
539 struct mutex st_mutex;
540 };
541
openlockstateid(struct nfs4_stid * s)542 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
543 {
544 return container_of(s, struct nfs4_ol_stateid, st_stid);
545 }
546
547 struct nfs4_layout_stateid {
548 struct nfs4_stid ls_stid;
549 struct list_head ls_perclnt;
550 struct list_head ls_perfile;
551 spinlock_t ls_lock;
552 struct list_head ls_layouts;
553 u32 ls_layout_type;
554 struct file *ls_file;
555 struct nfsd4_callback ls_recall;
556 stateid_t ls_recall_sid;
557 bool ls_recalled;
558 struct mutex ls_mutex;
559 };
560
layoutstateid(struct nfs4_stid * s)561 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
562 {
563 return container_of(s, struct nfs4_layout_stateid, ls_stid);
564 }
565
566 /* flags for preprocess_seqid_op() */
567 #define RD_STATE 0x00000010
568 #define WR_STATE 0x00000020
569
570 enum nfsd4_cb_op {
571 NFSPROC4_CLNT_CB_NULL = 0,
572 NFSPROC4_CLNT_CB_RECALL,
573 NFSPROC4_CLNT_CB_LAYOUT,
574 NFSPROC4_CLNT_CB_SEQUENCE,
575 };
576
577
578 struct nfsd4_compound_state;
579 struct nfsd_net;
580
581 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
582 struct nfsd4_compound_state *cstate, stateid_t *stateid,
583 int flags, struct file **filp, bool *tmp_file);
584 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
585 stateid_t *stateid, unsigned char typemask,
586 struct nfs4_stid **s, struct nfsd_net *nn);
587 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
588 void (*sc_free)(struct nfs4_stid *));
589 void nfs4_unhash_stid(struct nfs4_stid *s);
590 void nfs4_put_stid(struct nfs4_stid *s);
591 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
592 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
593 extern void nfs4_release_reclaim(struct nfsd_net *);
594 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
595 struct nfsd_net *nn);
596 extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
597 struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
598 extern int set_callback_cred(void);
599 extern void cleanup_callback_cred(void);
600 extern void nfsd4_probe_callback(struct nfs4_client *clp);
601 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
602 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
603 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
604 struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
605 extern void nfsd4_run_cb(struct nfsd4_callback *cb);
606 extern int nfsd4_create_callback_queue(void);
607 extern void nfsd4_destroy_callback_queue(void);
608 extern void nfsd4_shutdown_callback(struct nfs4_client *);
609 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
610 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
611 struct nfsd_net *nn);
612 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
613
614 struct nfs4_file *find_file(struct knfsd_fh *fh);
615 void put_nfs4_file(struct nfs4_file *fi);
get_nfs4_file(struct nfs4_file * fi)616 static inline void get_nfs4_file(struct nfs4_file *fi)
617 {
618 atomic_inc(&fi->fi_ref);
619 }
620 struct file *find_any_file(struct nfs4_file *f);
621
622 /* grace period management */
623 void nfsd4_end_grace(struct nfsd_net *nn);
624
625 /* nfs4recover operations */
626 extern int nfsd4_client_tracking_init(struct net *net);
627 extern void nfsd4_client_tracking_exit(struct net *net);
628 extern void nfsd4_client_record_create(struct nfs4_client *clp);
629 extern void nfsd4_client_record_remove(struct nfs4_client *clp);
630 extern int nfsd4_client_record_check(struct nfs4_client *clp);
631 extern void nfsd4_record_grace_done(struct nfsd_net *nn);
632
633 /* nfs fault injection functions */
634 #ifdef CONFIG_NFSD_FAULT_INJECTION
635 int nfsd_fault_inject_init(void);
636 void nfsd_fault_inject_cleanup(void);
637
638 u64 nfsd_inject_print_clients(void);
639 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t);
640 u64 nfsd_inject_forget_clients(u64);
641
642 u64 nfsd_inject_print_locks(void);
643 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t);
644 u64 nfsd_inject_forget_locks(u64);
645
646 u64 nfsd_inject_print_openowners(void);
647 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t);
648 u64 nfsd_inject_forget_openowners(u64);
649
650 u64 nfsd_inject_print_delegations(void);
651 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t);
652 u64 nfsd_inject_forget_delegations(u64);
653 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t);
654 u64 nfsd_inject_recall_delegations(u64);
655 #else /* CONFIG_NFSD_FAULT_INJECTION */
nfsd_fault_inject_init(void)656 static inline int nfsd_fault_inject_init(void) { return 0; }
nfsd_fault_inject_cleanup(void)657 static inline void nfsd_fault_inject_cleanup(void) {}
658 #endif /* CONFIG_NFSD_FAULT_INJECTION */
659
660 #endif /* NFSD4_STATE_H */
661