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