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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 <linux/nfsd/nfsfh.h>
41#include "nfsfh.h"
42
43typedef struct {
44 u32 cl_boot;
45 u32 cl_id;
46} clientid_t;
47
48typedef struct {
49 clientid_t so_clid;
50 u32 so_id;
51} stateid_opaque_t;
52
53typedef struct {
54 u32 si_generation;
55 stateid_opaque_t si_opaque;
56} stateid_t;
57
58#define STATEID_FMT "(%08x/%08x/%08x/%08x)"
59#define STATEID_VAL(s) \
60 (s)->si_opaque.so_clid.cl_boot, \
61 (s)->si_opaque.so_clid.cl_id, \
62 (s)->si_opaque.so_id, \
63 (s)->si_generation
64
65struct nfsd4_callback {
66 void *cb_op;
67 struct nfs4_client *cb_clp;
68 struct list_head cb_per_client;
69 u32 cb_minorversion;
70 struct rpc_message cb_msg;
71 const struct rpc_call_ops *cb_ops;
72 struct work_struct cb_work;
73 bool cb_done;
74};
75
76struct nfs4_stid {
77#define NFS4_OPEN_STID 1
78#define NFS4_LOCK_STID 2
79#define NFS4_DELEG_STID 4
80/* For an open stateid kept around *only* to process close replays: */
81#define NFS4_CLOSED_STID 8
82/* For a deleg stateid kept around only to process free_stateid's: */
83#define NFS4_REVOKED_DELEG_STID 16
84 unsigned char sc_type;
85 stateid_t sc_stateid;
86 struct nfs4_client *sc_client;
87};
88
89struct nfs4_delegation {
90 struct nfs4_stid dl_stid; /* must be first field */
91 struct list_head dl_perfile;
92 struct list_head dl_perclnt;
93 struct list_head dl_recall_lru; /* delegation recalled */
94 atomic_t dl_count; /* ref count */
95 struct nfs4_file *dl_file;
96 u32 dl_type;
97 time_t dl_time;
98/* For recall: */
99 struct knfsd_fh dl_fh;
100 int dl_retries;
101 struct nfsd4_callback dl_recall;
102};
103
104/* client delegation callback info */
105struct nfs4_cb_conn {
106 /* SETCLIENTID info */
107 struct sockaddr_storage cb_addr;
108 struct sockaddr_storage cb_saddr;
109 size_t cb_addrlen;
110 u32 cb_prog; /* used only in 4.0 case;
111 per-session otherwise */
112 u32 cb_ident; /* minorversion 0 only */
113 struct svc_xprt *cb_xprt; /* minorversion 1 only */
114};
115
116static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
117{
118 return container_of(s, struct nfs4_delegation, dl_stid);
119}
120
121/* Maximum number of slots per session. 160 is useful for long haul TCP */
122#define NFSD_MAX_SLOTS_PER_SESSION 160
123/* Maximum number of operations per session compound */
124#define NFSD_MAX_OPS_PER_COMPOUND 16
125/* Maximum session per slot cache size */
126#define NFSD_SLOT_CACHE_SIZE 1024
127/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
128#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
129#define NFSD_MAX_MEM_PER_SESSION \
130 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
131
132struct nfsd4_slot {
133 u32 sl_seqid;
134 __be32 sl_status;
135 u32 sl_datalen;
136 u16 sl_opcnt;
137#define NFSD4_SLOT_INUSE (1 << 0)
138#define NFSD4_SLOT_CACHETHIS (1 << 1)
139#define NFSD4_SLOT_INITIALIZED (1 << 2)
140 u8 sl_flags;
141 char sl_data[];
142};
143
144struct nfsd4_channel_attrs {
145 u32 headerpadsz;
146 u32 maxreq_sz;
147 u32 maxresp_sz;
148 u32 maxresp_cached;
149 u32 maxops;
150 u32 maxreqs;
151 u32 nr_rdma_attrs;
152 u32 rdma_attrs;
153};
154
155struct nfsd4_cb_sec {
156 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
157 kuid_t uid;
158 kgid_t gid;
159};
160
161struct nfsd4_create_session {
162 clientid_t clientid;
163 struct nfs4_sessionid sessionid;
164 u32 seqid;
165 u32 flags;
166 struct nfsd4_channel_attrs fore_channel;
167 struct nfsd4_channel_attrs back_channel;
168 u32 callback_prog;
169 struct nfsd4_cb_sec cb_sec;
170};
171
172struct nfsd4_backchannel_ctl {
173 u32 bc_cb_program;
174 struct nfsd4_cb_sec bc_cb_sec;
175};
176
177struct nfsd4_bind_conn_to_session {
178 struct nfs4_sessionid sessionid;
179 u32 dir;
180};
181
182/* The single slot clientid cache structure */
183struct nfsd4_clid_slot {
184 u32 sl_seqid;
185 __be32 sl_status;
186 struct nfsd4_create_session sl_cr_ses;
187};
188
189struct nfsd4_conn {
190 struct list_head cn_persession;
191 struct svc_xprt *cn_xprt;
192 struct svc_xpt_user cn_xpt_user;
193 struct nfsd4_session *cn_session;
194/* CDFC4_FORE, CDFC4_BACK: */
195 unsigned char cn_flags;
196};
197
198struct nfsd4_session {
199 atomic_t se_ref;
200 struct list_head se_hash; /* hash by sessionid */
201 struct list_head se_perclnt;
202/* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
203#define NFS4_SESSION_DEAD 0x010
204 u32 se_flags;
205 struct nfs4_client *se_client;
206 struct nfs4_sessionid se_sessionid;
207 struct nfsd4_channel_attrs se_fchannel;
208 struct nfsd4_channel_attrs se_bchannel;
209 struct nfsd4_cb_sec se_cb_sec;
210 struct list_head se_conns;
211 u32 se_cb_prog;
212 u32 se_cb_seq_nr;
213 struct nfsd4_slot *se_slots[]; /* forward channel slots */
214};
215
216extern void nfsd4_put_session(struct nfsd4_session *ses);
217
218/* formatted contents of nfs4_sessionid */
219struct nfsd4_sessionid {
220 clientid_t clientid;
221 u32 sequence;
222 u32 reserved;
223};
224
225#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
226
227/*
228 * struct nfs4_client - one per client. Clientids live here.
229 * o Each nfs4_client is hashed by clientid.
230 *
231 * o Each nfs4_clients is also hashed by name
232 * (the opaque quantity initially sent by the client to identify itself).
233 *
234 * o cl_perclient list is used to ensure no dangling stateowner references
235 * when we expire the nfs4_client
236 */
237struct nfs4_client {
238 struct list_head cl_idhash; /* hash by cl_clientid.id */
239 struct rb_node cl_namenode; /* link into by-name trees */
240 struct list_head cl_openowners;
241 struct idr cl_stateids; /* stateid lookup */
242 struct list_head cl_delegations;
243 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
244 struct list_head cl_lru; /* tail queue */
245 struct xdr_netobj cl_name; /* id generated by client */
246 nfs4_verifier cl_verifier; /* generated by client */
247 time_t cl_time; /* time of last lease renewal */
248 struct sockaddr_storage cl_addr; /* client ipaddress */
249 bool cl_mach_cred; /* SP4_MACH_CRED in force */
250 struct svc_cred cl_cred; /* setclientid principal */
251 clientid_t cl_clientid; /* generated by server */
252 nfs4_verifier cl_confirm; /* generated by server */
253 u32 cl_minorversion;
254
255 /* for v4.0 and v4.1 callbacks: */
256 struct nfs4_cb_conn cl_cb_conn;
257#define NFSD4_CLIENT_CB_UPDATE (0)
258#define NFSD4_CLIENT_CB_KILL (1)
259#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
260#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
261#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
262#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
263 1 << NFSD4_CLIENT_CB_KILL)
264 unsigned long cl_flags;
265 struct rpc_cred *cl_cb_cred;
266 struct rpc_clnt *cl_cb_client;
267 u32 cl_cb_ident;
268#define NFSD4_CB_UP 0
269#define NFSD4_CB_UNKNOWN 1
270#define NFSD4_CB_DOWN 2
271#define NFSD4_CB_FAULT 3
272 int cl_cb_state;
273 struct nfsd4_callback cl_cb_null;
274 struct nfsd4_session *cl_cb_session;
275 struct list_head cl_callbacks; /* list of in-progress callbacks */
276
277 /* for all client information that callback code might need: */
278 spinlock_t cl_lock;
279
280 /* for nfs41 */
281 struct list_head cl_sessions;
282 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
283 u32 cl_exchange_flags;
284 /* number of rpc's in progress over an associated session: */
285 atomic_t cl_refcount;
286
287 /* for nfs41 callbacks */
288 /* We currently support a single back channel with a single slot */
289 unsigned long cl_cb_slot_busy;
290 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
291 /* wait here for slots */
292 struct net *net;
293};
294
295/* struct nfs4_client_reset
296 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
297 * upon lease reset, or from upcall to state_daemon (to read in state
298 * from non-volitile storage) upon reboot.
299 */
300struct nfs4_client_reclaim {
301 struct list_head cr_strhash; /* hash by cr_name */
302 struct nfs4_client *cr_clp; /* pointer to associated clp */
303 char cr_recdir[HEXDIR_LEN]; /* recover dir */
304};
305
306static inline void
307update_stateid(stateid_t *stateid)
308{
309 stateid->si_generation++;
310 /* Wraparound recommendation from 3530bis-13 9.1.3.2: */
311 if (stateid->si_generation == 0)
312 stateid->si_generation = 1;
313}
314
315/* A reasonable value for REPLAY_ISIZE was estimated as follows:
316 * The OPEN response, typically the largest, requires
317 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
318 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
319 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
320 */
321
322#define NFSD4_REPLAY_ISIZE 112
323
324/*
325 * Replay buffer, where the result of the last seqid-mutating operation
326 * is cached.
327 */
328struct nfs4_replay {
329 __be32 rp_status;
330 unsigned int rp_buflen;
331 char *rp_buf;
332 struct knfsd_fh rp_openfh;
333 char rp_ibuf[NFSD4_REPLAY_ISIZE];
334};
335
336struct nfs4_stateowner {
337 struct list_head so_strhash; /* hash by op_name */
338 struct list_head so_stateids;
339 struct nfs4_client * so_client;
340 /* after increment in ENCODE_SEQID_OP_TAIL, represents the next
341 * sequence id expected from the client: */
342 u32 so_seqid;
343 struct xdr_netobj so_owner; /* open owner name */
344 struct nfs4_replay so_replay;
345 bool so_is_open_owner;
346};
347
348struct nfs4_openowner {
349 struct nfs4_stateowner oo_owner; /* must be first field */
350 struct list_head oo_perclient;
351 /*
352 * We keep around openowners a little while after last close,
353 * which saves clients from having to confirm, and allows us to
354 * handle close replays if they come soon enough. The close_lru
355 * is a list of such openowners, to be reaped by the laundromat
356 * thread eventually if they remain unused:
357 */
358 struct list_head oo_close_lru;
359 struct nfs4_ol_stateid *oo_last_closed_stid;
360 time_t oo_time; /* time of placement on so_close_lru */
361#define NFS4_OO_CONFIRMED 1
362#define NFS4_OO_NEW 4
363 unsigned char oo_flags;
364};
365
366struct nfs4_lockowner {
367 struct nfs4_stateowner lo_owner; /* must be first element */
368 struct list_head lo_owner_ino_hash; /* hash by owner,file */
369 struct list_head lo_perstateid;
370 struct list_head lo_list; /* for temporary uses */
371};
372
373static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
374{
375 return container_of(so, struct nfs4_openowner, oo_owner);
376}
377
378static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
379{
380 return container_of(so, struct nfs4_lockowner, lo_owner);
381}
382
383/* nfs4_file: a file opened by some number of (open) nfs4_stateowners. */
384struct nfs4_file {
385 atomic_t fi_ref;
386 struct hlist_node fi_hash; /* hash by "struct inode *" */
387 struct list_head fi_stateids;
388 struct list_head fi_delegations;
389 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
390 struct file * fi_fds[3];
391 /*
392 * Each open or lock stateid contributes 0-4 to the counts
393 * below depending on which bits are set in st_access_bitmap:
394 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
395 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
396 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
397 */
398 atomic_t fi_access[2];
399 struct file *fi_deleg_file;
400 struct file_lock *fi_lease;
401 atomic_t fi_delegees;
402 struct inode *fi_inode;
403 bool fi_had_conflict;
404};
405
406/* XXX: for first cut may fall back on returning file that doesn't work
407 * at all? */
408static inline struct file *find_writeable_file(struct nfs4_file *f)
409{
410 if (f->fi_fds[O_WRONLY])
411 return f->fi_fds[O_WRONLY];
412 return f->fi_fds[O_RDWR];
413}
414
415static inline struct file *find_readable_file(struct nfs4_file *f)
416{
417 if (f->fi_fds[O_RDONLY])
418 return f->fi_fds[O_RDONLY];
419 return f->fi_fds[O_RDWR];
420}
421
422static inline struct file *find_any_file(struct nfs4_file *f)
423{
424 if (f->fi_fds[O_RDWR])
425 return f->fi_fds[O_RDWR];
426 else if (f->fi_fds[O_WRONLY])
427 return f->fi_fds[O_WRONLY];
428 else
429 return f->fi_fds[O_RDONLY];
430}
431
432/* "ol" stands for "Open or Lock". Better suggestions welcome. */
433struct nfs4_ol_stateid {
434 struct nfs4_stid st_stid; /* must be first field */
435 struct list_head st_perfile;
436 struct list_head st_perstateowner;
437 struct list_head st_lockowners;
438 struct nfs4_stateowner * st_stateowner;
439 struct nfs4_file * st_file;
440 unsigned long st_access_bmap;
441 unsigned long st_deny_bmap;
442 struct nfs4_ol_stateid * st_openstp;
443};
444
445static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
446{
447 return container_of(s, struct nfs4_ol_stateid, st_stid);
448}
449
450/* flags for preprocess_seqid_op() */
451#define RD_STATE 0x00000010
452#define WR_STATE 0x00000020
453
454struct nfsd4_compound_state;
455struct nfsd_net;
456
457extern __be32 nfs4_preprocess_stateid_op(struct net *net,
458 struct nfsd4_compound_state *cstate,
459 stateid_t *stateid, int flags, struct file **filp);
460extern void nfs4_lock_state(void);
461extern void nfs4_unlock_state(void);
462void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
463extern void nfs4_release_reclaim(struct nfsd_net *);
464extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
465 struct nfsd_net *nn);
466extern __be32 nfs4_check_open_reclaim(clientid_t *clid, bool sessions, struct nfsd_net *nn);
467extern void nfs4_free_openowner(struct nfs4_openowner *);
468extern void nfs4_free_lockowner(struct nfs4_lockowner *);
469extern int set_callback_cred(void);
470extern void nfsd4_init_callback(struct nfsd4_callback *);
471extern void nfsd4_probe_callback(struct nfs4_client *clp);
472extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
473extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
474extern void nfsd4_cb_recall(struct nfs4_delegation *dp);
475extern int nfsd4_create_callback_queue(void);
476extern void nfsd4_destroy_callback_queue(void);
477extern void nfsd4_shutdown_callback(struct nfs4_client *);
478extern void nfs4_put_delegation(struct nfs4_delegation *dp);
479extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
480 struct nfsd_net *nn);
481extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
482extern void put_client_renew(struct nfs4_client *clp);
483
484/* nfs4recover operations */
485extern int nfsd4_client_tracking_init(struct net *net);
486extern void nfsd4_client_tracking_exit(struct net *net);
487extern void nfsd4_client_record_create(struct nfs4_client *clp);
488extern void nfsd4_client_record_remove(struct nfs4_client *clp);
489extern int nfsd4_client_record_check(struct nfs4_client *clp);
490extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time);
491
492/* nfs fault injection functions */
493#ifdef CONFIG_NFSD_FAULT_INJECTION
494int nfsd_fault_inject_init(void);
495void nfsd_fault_inject_cleanup(void);
496u64 nfsd_for_n_state(u64, u64 (*)(struct nfs4_client *, u64));
497struct nfs4_client *nfsd_find_client(struct sockaddr_storage *, size_t);
498
499u64 nfsd_forget_client(struct nfs4_client *, u64);
500u64 nfsd_forget_client_locks(struct nfs4_client*, u64);
501u64 nfsd_forget_client_openowners(struct nfs4_client *, u64);
502u64 nfsd_forget_client_delegations(struct nfs4_client *, u64);
503u64 nfsd_recall_client_delegations(struct nfs4_client *, u64);
504
505u64 nfsd_print_client(struct nfs4_client *, u64);
506u64 nfsd_print_client_locks(struct nfs4_client *, u64);
507u64 nfsd_print_client_openowners(struct nfs4_client *, u64);
508u64 nfsd_print_client_delegations(struct nfs4_client *, u64);
509#else /* CONFIG_NFSD_FAULT_INJECTION */
510static inline int nfsd_fault_inject_init(void) { return 0; }
511static inline void nfsd_fault_inject_cleanup(void) {}
512#endif /* CONFIG_NFSD_FAULT_INJECTION */
513
514#endif /* NFSD4_STATE_H */
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/refcount.h>
40#include <linux/sunrpc/svc_xprt.h>
41#include "nfsfh.h"
42#include "nfsd.h"
43
44typedef struct {
45 u32 cl_boot;
46 u32 cl_id;
47} clientid_t;
48
49typedef struct {
50 clientid_t so_clid;
51 u32 so_id;
52} stateid_opaque_t;
53
54typedef struct {
55 u32 si_generation;
56 stateid_opaque_t si_opaque;
57} stateid_t;
58
59typedef struct {
60 stateid_t stid;
61#define NFS4_COPY_STID 1
62#define NFS4_COPYNOTIFY_STID 2
63 unsigned char sc_type;
64 refcount_t sc_count;
65} copy_stateid_t;
66
67struct 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;
72 int cb_seq_status;
73 int cb_status;
74 bool cb_need_restart;
75 bool cb_holds_slot;
76};
77
78struct nfsd4_callback_ops {
79 void (*prepare)(struct nfsd4_callback *);
80 int (*done)(struct nfsd4_callback *, struct rpc_task *);
81 void (*release)(struct nfsd4_callback *);
82};
83
84/*
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.
88 */
89struct nfs4_stid {
90 refcount_t sc_count;
91#define NFS4_OPEN_STID 1
92#define NFS4_LOCK_STID 2
93#define NFS4_DELEG_STID 4
94/* For an open stateid kept around *only* to process close replays: */
95#define NFS4_CLOSED_STID 8
96/* For a deleg stateid kept around only to process free_stateid's: */
97#define NFS4_REVOKED_DELEG_STID 16
98#define NFS4_CLOSED_DELEG_STID 32
99#define NFS4_LAYOUT_STID 64
100 struct list_head sc_cp_list;
101 unsigned char sc_type;
102 stateid_t sc_stateid;
103 spinlock_t sc_lock;
104 struct nfs4_client *sc_client;
105 struct nfs4_file *sc_file;
106 void (*sc_free)(struct nfs4_stid *);
107};
108
109/* Keep a list of stateids issued by the COPY_NOTIFY, associate it with the
110 * parent OPEN/LOCK/DELEG stateid.
111 */
112struct nfs4_cpntf_state {
113 copy_stateid_t cp_stateid;
114 struct list_head cp_list; /* per parent nfs4_stid */
115 stateid_t cp_p_stateid; /* copy of parent's stateid */
116 clientid_t cp_p_clid; /* copy of parent's clid */
117 time64_t cpntf_time; /* last time stateid used */
118};
119
120/*
121 * Represents a delegation stateid. The nfs4_client holds references to these
122 * and they are put when it is being destroyed or when the delegation is
123 * returned by the client:
124 *
125 * o 1 reference as long as a delegation is still in force (taken when it's
126 * alloc'd, put when it's returned or revoked)
127 *
128 * o 1 reference as long as a recall rpc is in progress (taken when the lease
129 * is broken, put when the rpc exits)
130 *
131 * o 1 more ephemeral reference for each nfsd thread currently doing something
132 * with that delegation without holding the cl_lock
133 *
134 * If the server attempts to recall a delegation and the client doesn't do so
135 * before a timeout, the server may also revoke the delegation. In that case,
136 * the object will either be destroyed (v4.0) or moved to a per-client list of
137 * revoked delegations (v4.1+).
138 *
139 * This object is a superset of the nfs4_stid.
140 */
141struct nfs4_delegation {
142 struct nfs4_stid dl_stid; /* must be first field */
143 struct list_head dl_perfile;
144 struct list_head dl_perclnt;
145 struct list_head dl_recall_lru; /* delegation recalled */
146 struct nfs4_clnt_odstate *dl_clnt_odstate;
147 u32 dl_type;
148 time64_t dl_time;
149/* For recall: */
150 int dl_retries;
151 struct nfsd4_callback dl_recall;
152};
153
154#define cb_to_delegation(cb) \
155 container_of(cb, struct nfs4_delegation, dl_recall)
156
157/* client delegation callback info */
158struct nfs4_cb_conn {
159 /* SETCLIENTID info */
160 struct sockaddr_storage cb_addr;
161 struct sockaddr_storage cb_saddr;
162 size_t cb_addrlen;
163 u32 cb_prog; /* used only in 4.0 case;
164 per-session otherwise */
165 u32 cb_ident; /* minorversion 0 only */
166 struct svc_xprt *cb_xprt; /* minorversion 1 only */
167};
168
169static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
170{
171 return container_of(s, struct nfs4_delegation, dl_stid);
172}
173
174/* Maximum number of slots per session. 160 is useful for long haul TCP */
175#define NFSD_MAX_SLOTS_PER_SESSION 160
176/* Maximum number of operations per session compound */
177#define NFSD_MAX_OPS_PER_COMPOUND 16
178/* Maximum session per slot cache size */
179#define NFSD_SLOT_CACHE_SIZE 2048
180/* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */
181#define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32
182#define NFSD_MAX_MEM_PER_SESSION \
183 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE)
184
185struct nfsd4_slot {
186 u32 sl_seqid;
187 __be32 sl_status;
188 struct svc_cred sl_cred;
189 u32 sl_datalen;
190 u16 sl_opcnt;
191#define NFSD4_SLOT_INUSE (1 << 0)
192#define NFSD4_SLOT_CACHETHIS (1 << 1)
193#define NFSD4_SLOT_INITIALIZED (1 << 2)
194#define NFSD4_SLOT_CACHED (1 << 3)
195 u8 sl_flags;
196 char sl_data[];
197};
198
199struct nfsd4_channel_attrs {
200 u32 headerpadsz;
201 u32 maxreq_sz;
202 u32 maxresp_sz;
203 u32 maxresp_cached;
204 u32 maxops;
205 u32 maxreqs;
206 u32 nr_rdma_attrs;
207 u32 rdma_attrs;
208};
209
210struct nfsd4_cb_sec {
211 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */
212 kuid_t uid;
213 kgid_t gid;
214};
215
216struct nfsd4_create_session {
217 clientid_t clientid;
218 struct nfs4_sessionid sessionid;
219 u32 seqid;
220 u32 flags;
221 struct nfsd4_channel_attrs fore_channel;
222 struct nfsd4_channel_attrs back_channel;
223 u32 callback_prog;
224 struct nfsd4_cb_sec cb_sec;
225};
226
227struct nfsd4_backchannel_ctl {
228 u32 bc_cb_program;
229 struct nfsd4_cb_sec bc_cb_sec;
230};
231
232struct nfsd4_bind_conn_to_session {
233 struct nfs4_sessionid sessionid;
234 u32 dir;
235};
236
237/* The single slot clientid cache structure */
238struct nfsd4_clid_slot {
239 u32 sl_seqid;
240 __be32 sl_status;
241 struct nfsd4_create_session sl_cr_ses;
242};
243
244struct nfsd4_conn {
245 struct list_head cn_persession;
246 struct svc_xprt *cn_xprt;
247 struct svc_xpt_user cn_xpt_user;
248 struct nfsd4_session *cn_session;
249/* CDFC4_FORE, CDFC4_BACK: */
250 unsigned char cn_flags;
251};
252
253/*
254 * Representation of a v4.1+ session. These are refcounted in a similar fashion
255 * to the nfs4_client. References are only taken when the server is actively
256 * working on the object (primarily during the processing of compounds).
257 */
258struct nfsd4_session {
259 atomic_t se_ref;
260 struct list_head se_hash; /* hash by sessionid */
261 struct list_head se_perclnt;
262/* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */
263#define NFS4_SESSION_DEAD 0x010
264 u32 se_flags;
265 struct nfs4_client *se_client;
266 struct nfs4_sessionid se_sessionid;
267 struct nfsd4_channel_attrs se_fchannel;
268 struct nfsd4_channel_attrs se_bchannel;
269 struct nfsd4_cb_sec se_cb_sec;
270 struct list_head se_conns;
271 u32 se_cb_prog;
272 u32 se_cb_seq_nr;
273 struct nfsd4_slot *se_slots[]; /* forward channel slots */
274};
275
276/* formatted contents of nfs4_sessionid */
277struct nfsd4_sessionid {
278 clientid_t clientid;
279 u32 sequence;
280 u32 reserved;
281};
282
283#define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */
284
285/*
286 * struct nfs4_client - one per client. Clientids live here.
287 *
288 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0)
289 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped.
290 * Each nfsd_net_ns object contains a set of these and they are tracked via
291 * short and long form clientid. They are hashed and searched for under the
292 * per-nfsd_net client_lock spinlock.
293 *
294 * References to it are only held during the processing of compounds, and in
295 * certain other operations. In their "resting state" they have a refcount of
296 * 0. If they are not renewed within a lease period, they become eligible for
297 * destruction by the laundromat.
298 *
299 * These objects can also be destroyed prematurely by the fault injection code,
300 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates.
301 * Care is taken *not* to do this however when the objects have an elevated
302 * refcount.
303 *
304 * o Each nfs4_client is hashed by clientid
305 *
306 * o Each nfs4_clients is also hashed by name (the opaque quantity initially
307 * sent by the client to identify itself).
308 *
309 * o cl_perclient list is used to ensure no dangling stateowner references
310 * when we expire the nfs4_client
311 */
312struct nfs4_client {
313 struct list_head cl_idhash; /* hash by cl_clientid.id */
314 struct rb_node cl_namenode; /* link into by-name trees */
315 struct list_head *cl_ownerstr_hashtbl;
316 struct list_head cl_openowners;
317 struct idr cl_stateids; /* stateid lookup */
318 struct list_head cl_delegations;
319 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */
320 struct list_head cl_lru; /* tail queue */
321#ifdef CONFIG_NFSD_PNFS
322 struct list_head cl_lo_states; /* outstanding layout states */
323#endif
324 struct xdr_netobj cl_name; /* id generated by client */
325 nfs4_verifier cl_verifier; /* generated by client */
326 time64_t cl_time; /* time of last lease renewal */
327 struct sockaddr_storage cl_addr; /* client ipaddress */
328 bool cl_mach_cred; /* SP4_MACH_CRED in force */
329 struct svc_cred cl_cred; /* setclientid principal */
330 clientid_t cl_clientid; /* generated by server */
331 nfs4_verifier cl_confirm; /* generated by server */
332 u32 cl_minorversion;
333 /* NFSv4.1 client implementation id: */
334 struct xdr_netobj cl_nii_domain;
335 struct xdr_netobj cl_nii_name;
336 struct timespec64 cl_nii_time;
337
338 /* for v4.0 and v4.1 callbacks: */
339 struct nfs4_cb_conn cl_cb_conn;
340#define NFSD4_CLIENT_CB_UPDATE (0)
341#define NFSD4_CLIENT_CB_KILL (1)
342#define NFSD4_CLIENT_STABLE (2) /* client on stable storage */
343#define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */
344#define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */
345#define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */
346#define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \
347 1 << NFSD4_CLIENT_CB_KILL)
348 unsigned long cl_flags;
349 const struct cred *cl_cb_cred;
350 struct rpc_clnt *cl_cb_client;
351 u32 cl_cb_ident;
352#define NFSD4_CB_UP 0
353#define NFSD4_CB_UNKNOWN 1
354#define NFSD4_CB_DOWN 2
355#define NFSD4_CB_FAULT 3
356 int cl_cb_state;
357 struct nfsd4_callback cl_cb_null;
358 struct nfsd4_session *cl_cb_session;
359
360 /* for all client information that callback code might need: */
361 spinlock_t cl_lock;
362
363 /* for nfs41 */
364 struct list_head cl_sessions;
365 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */
366 u32 cl_exchange_flags;
367 /* number of rpc's in progress over an associated session: */
368 atomic_t cl_rpc_users;
369 struct nfsdfs_client cl_nfsdfs;
370 struct nfs4_op_map cl_spo_must_allow;
371
372 /* debugging info directory under nfsd/clients/ : */
373 struct dentry *cl_nfsd_dentry;
374
375 /* for nfs41 callbacks */
376 /* We currently support a single back channel with a single slot */
377 unsigned long cl_cb_slot_busy;
378 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */
379 /* wait here for slots */
380 struct net *net;
381 struct list_head async_copies; /* list of async copies */
382 spinlock_t async_lock; /* lock for async copies */
383 atomic_t cl_cb_inflight; /* Outstanding callbacks */
384};
385
386/* struct nfs4_client_reset
387 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl
388 * upon lease reset, or from upcall to state_daemon (to read in state
389 * from non-volitile storage) upon reboot.
390 */
391struct nfs4_client_reclaim {
392 struct list_head cr_strhash; /* hash by cr_name */
393 struct nfs4_client *cr_clp; /* pointer to associated clp */
394 struct xdr_netobj cr_name; /* recovery dir name */
395 struct xdr_netobj cr_princhash;
396};
397
398/* A reasonable value for REPLAY_ISIZE was estimated as follows:
399 * The OPEN response, typically the largest, requires
400 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) +
401 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) +
402 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes
403 */
404
405#define NFSD4_REPLAY_ISIZE 112
406
407/*
408 * Replay buffer, where the result of the last seqid-mutating operation
409 * is cached.
410 */
411struct nfs4_replay {
412 __be32 rp_status;
413 unsigned int rp_buflen;
414 char *rp_buf;
415 struct knfsd_fh rp_openfh;
416 struct mutex rp_mutex;
417 char rp_ibuf[NFSD4_REPLAY_ISIZE];
418};
419
420struct nfs4_stateowner;
421
422struct nfs4_stateowner_operations {
423 void (*so_unhash)(struct nfs4_stateowner *);
424 void (*so_free)(struct nfs4_stateowner *);
425};
426
427/*
428 * A core object that represents either an open or lock owner. The object and
429 * lock owner objects have one of these embedded within them. Refcounts and
430 * other fields common to both owner types are contained within these
431 * structures.
432 */
433struct nfs4_stateowner {
434 struct list_head so_strhash;
435 struct list_head so_stateids;
436 struct nfs4_client *so_client;
437 const struct nfs4_stateowner_operations *so_ops;
438 /* after increment in nfsd4_bump_seqid, represents the next
439 * sequence id expected from the client: */
440 atomic_t so_count;
441 u32 so_seqid;
442 struct xdr_netobj so_owner; /* open owner name */
443 struct nfs4_replay so_replay;
444 bool so_is_open_owner;
445};
446
447/*
448 * When a file is opened, the client provides an open state owner opaque string
449 * that indicates the "owner" of that open. These objects are refcounted.
450 * References to it are held by each open state associated with it. This object
451 * is a superset of the nfs4_stateowner struct.
452 */
453struct nfs4_openowner {
454 struct nfs4_stateowner oo_owner; /* must be first field */
455 struct list_head oo_perclient;
456 /*
457 * We keep around openowners a little while after last close,
458 * which saves clients from having to confirm, and allows us to
459 * handle close replays if they come soon enough. The close_lru
460 * is a list of such openowners, to be reaped by the laundromat
461 * thread eventually if they remain unused:
462 */
463 struct list_head oo_close_lru;
464 struct nfs4_ol_stateid *oo_last_closed_stid;
465 time64_t oo_time; /* time of placement on so_close_lru */
466#define NFS4_OO_CONFIRMED 1
467 unsigned char oo_flags;
468};
469
470/*
471 * Represents a generic "lockowner". Similar to an openowner. References to it
472 * are held by the lock stateids that are created on its behalf. This object is
473 * a superset of the nfs4_stateowner struct.
474 */
475struct nfs4_lockowner {
476 struct nfs4_stateowner lo_owner; /* must be first element */
477 struct list_head lo_blocked; /* blocked file_locks */
478};
479
480static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so)
481{
482 return container_of(so, struct nfs4_openowner, oo_owner);
483}
484
485static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so)
486{
487 return container_of(so, struct nfs4_lockowner, lo_owner);
488}
489
490/*
491 * Per-client state indicating no. of opens and outstanding delegations
492 * on a file from a particular client.'od' stands for 'open & delegation'
493 */
494struct nfs4_clnt_odstate {
495 struct nfs4_client *co_client;
496 struct nfs4_file *co_file;
497 struct list_head co_perfile;
498 refcount_t co_odcount;
499};
500
501/*
502 * nfs4_file: a file opened by some number of (open) nfs4_stateowners.
503 *
504 * These objects are global. nfsd keeps one instance of a nfs4_file per
505 * filehandle (though it may keep multiple file descriptors for each). Each
506 * inode can have multiple filehandles associated with it, so there is
507 * (potentially) a many to one relationship between this struct and struct
508 * inode.
509 *
510 * These are hashed by filehandle in the file_hashtbl, which is protected by
511 * the global state_lock spinlock.
512 */
513struct nfs4_file {
514 refcount_t fi_ref;
515 spinlock_t fi_lock;
516 struct hlist_node fi_hash; /* hash on fi_fhandle */
517 struct list_head fi_stateids;
518 union {
519 struct list_head fi_delegations;
520 struct rcu_head fi_rcu;
521 };
522 struct list_head fi_clnt_odstate;
523 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */
524 struct nfsd_file *fi_fds[3];
525 /*
526 * Each open or lock stateid contributes 0-4 to the counts
527 * below depending on which bits are set in st_access_bitmap:
528 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set
529 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set
530 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set.
531 */
532 atomic_t fi_access[2];
533 u32 fi_share_deny;
534 struct nfsd_file *fi_deleg_file;
535 int fi_delegees;
536 struct knfsd_fh fi_fhandle;
537 bool fi_had_conflict;
538#ifdef CONFIG_NFSD_PNFS
539 struct list_head fi_lo_states;
540 atomic_t fi_lo_recalls;
541#endif
542};
543
544/*
545 * A generic struct representing either a open or lock stateid. The nfs4_client
546 * holds a reference to each of these objects, and they in turn hold a
547 * reference to their respective stateowners. The client's reference is
548 * released in response to a close or unlock (depending on whether it's an open
549 * or lock stateid) or when the client is being destroyed.
550 *
551 * In the case of v4.0 open stateids, these objects are preserved for a little
552 * while after close in order to handle CLOSE replays. Those are eventually
553 * reclaimed via a LRU scheme by the laundromat.
554 *
555 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock".
556 * Better suggestions welcome.
557 */
558struct nfs4_ol_stateid {
559 struct nfs4_stid st_stid;
560 struct list_head st_perfile;
561 struct list_head st_perstateowner;
562 struct list_head st_locks;
563 struct nfs4_stateowner *st_stateowner;
564 struct nfs4_clnt_odstate *st_clnt_odstate;
565 unsigned char st_access_bmap;
566 unsigned char st_deny_bmap;
567 struct nfs4_ol_stateid *st_openstp;
568 struct mutex st_mutex;
569};
570
571static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s)
572{
573 return container_of(s, struct nfs4_ol_stateid, st_stid);
574}
575
576struct nfs4_layout_stateid {
577 struct nfs4_stid ls_stid;
578 struct list_head ls_perclnt;
579 struct list_head ls_perfile;
580 spinlock_t ls_lock;
581 struct list_head ls_layouts;
582 u32 ls_layout_type;
583 struct nfsd_file *ls_file;
584 struct nfsd4_callback ls_recall;
585 stateid_t ls_recall_sid;
586 bool ls_recalled;
587 struct mutex ls_mutex;
588};
589
590static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s)
591{
592 return container_of(s, struct nfs4_layout_stateid, ls_stid);
593}
594
595/* flags for preprocess_seqid_op() */
596#define RD_STATE 0x00000010
597#define WR_STATE 0x00000020
598
599enum nfsd4_cb_op {
600 NFSPROC4_CLNT_CB_NULL = 0,
601 NFSPROC4_CLNT_CB_RECALL,
602 NFSPROC4_CLNT_CB_LAYOUT,
603 NFSPROC4_CLNT_CB_OFFLOAD,
604 NFSPROC4_CLNT_CB_SEQUENCE,
605 NFSPROC4_CLNT_CB_NOTIFY_LOCK,
606};
607
608/* Returns true iff a is later than b: */
609static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b)
610{
611 return (s32)(a->si_generation - b->si_generation) > 0;
612}
613
614/*
615 * When a client tries to get a lock on a file, we set one of these objects
616 * on the blocking lock. When the lock becomes free, we can then issue a
617 * CB_NOTIFY_LOCK to the server.
618 */
619struct nfsd4_blocked_lock {
620 struct list_head nbl_list;
621 struct list_head nbl_lru;
622 time64_t nbl_time;
623 struct file_lock nbl_lock;
624 struct knfsd_fh nbl_fh;
625 struct nfsd4_callback nbl_cb;
626};
627
628struct nfsd4_compound_state;
629struct nfsd_net;
630struct nfsd4_copy;
631
632extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp,
633 struct nfsd4_compound_state *cstate, struct svc_fh *fhp,
634 stateid_t *stateid, int flags, struct nfsd_file **filp,
635 struct nfs4_stid **cstid);
636__be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate,
637 stateid_t *stateid, unsigned char typemask,
638 struct nfs4_stid **s, struct nfsd_net *nn);
639struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab,
640 void (*sc_free)(struct nfs4_stid *));
641int nfs4_init_copy_state(struct nfsd_net *nn, struct nfsd4_copy *copy);
642void nfs4_free_copy_state(struct nfsd4_copy *copy);
643struct nfs4_cpntf_state *nfs4_alloc_init_cpntf_state(struct nfsd_net *nn,
644 struct nfs4_stid *p_stid);
645void nfs4_unhash_stid(struct nfs4_stid *s);
646void nfs4_put_stid(struct nfs4_stid *s);
647void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
648void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
649extern void nfs4_release_reclaim(struct nfsd_net *);
650extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
651 struct nfsd_net *nn);
652extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
653 struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
654extern void nfsd4_probe_callback(struct nfs4_client *clp);
655extern void nfsd4_probe_callback_sync(struct nfs4_client *clp);
656extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *);
657extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
658 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op);
659extern void nfsd4_run_cb(struct nfsd4_callback *cb);
660extern int nfsd4_create_callback_queue(void);
661extern void nfsd4_destroy_callback_queue(void);
662extern void nfsd4_shutdown_callback(struct nfs4_client *);
663extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
664extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
665extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
666 struct xdr_netobj princhash, struct nfsd_net *nn);
667extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
668
669struct nfs4_file *find_file(struct knfsd_fh *fh);
670void put_nfs4_file(struct nfs4_file *fi);
671extern void nfs4_put_copy(struct nfsd4_copy *copy);
672extern struct nfsd4_copy *
673find_async_copy(struct nfs4_client *clp, stateid_t *staetid);
674extern void nfs4_put_cpntf_state(struct nfsd_net *nn,
675 struct nfs4_cpntf_state *cps);
676extern __be32 manage_cpntf_state(struct nfsd_net *nn, stateid_t *st,
677 struct nfs4_client *clp,
678 struct nfs4_cpntf_state **cps);
679static inline void get_nfs4_file(struct nfs4_file *fi)
680{
681 refcount_inc(&fi->fi_ref);
682}
683struct nfsd_file *find_any_file(struct nfs4_file *f);
684
685/* grace period management */
686void nfsd4_end_grace(struct nfsd_net *nn);
687
688/* nfs4recover operations */
689extern int nfsd4_client_tracking_init(struct net *net);
690extern void nfsd4_client_tracking_exit(struct net *net);
691extern void nfsd4_client_record_create(struct nfs4_client *clp);
692extern void nfsd4_client_record_remove(struct nfs4_client *clp);
693extern int nfsd4_client_record_check(struct nfs4_client *clp);
694extern void nfsd4_record_grace_done(struct nfsd_net *nn);
695
696/* nfs fault injection functions */
697#ifdef CONFIG_NFSD_FAULT_INJECTION
698void nfsd_fault_inject_init(void);
699void nfsd_fault_inject_cleanup(void);
700
701u64 nfsd_inject_print_clients(void);
702u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t);
703u64 nfsd_inject_forget_clients(u64);
704
705u64 nfsd_inject_print_locks(void);
706u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t);
707u64 nfsd_inject_forget_locks(u64);
708
709u64 nfsd_inject_print_openowners(void);
710u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t);
711u64 nfsd_inject_forget_openowners(u64);
712
713u64 nfsd_inject_print_delegations(void);
714u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t);
715u64 nfsd_inject_forget_delegations(u64);
716u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t);
717u64 nfsd_inject_recall_delegations(u64);
718#else /* CONFIG_NFSD_FAULT_INJECTION */
719static inline void nfsd_fault_inject_init(void) {}
720static inline void nfsd_fault_inject_cleanup(void) {}
721#endif /* CONFIG_NFSD_FAULT_INJECTION */
722
723#endif /* NFSD4_STATE_H */