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 void *cb_op; 66 struct nfs4_client *cb_clp; 67 struct list_head cb_per_client; 68 u32 cb_minorversion; 69 struct rpc_message cb_msg; 70 const struct rpc_call_ops *cb_ops; 71 struct work_struct cb_work; 72 bool cb_done; 73 }; 74 75 /* 76 * A core object that represents a "common" stateid. These are generally 77 * embedded within the different (more specific) stateid objects and contain 78 * fields that are of general use to any stateid. 79 */ 80 struct nfs4_stid { 81 atomic_t sc_count; 82 #define NFS4_OPEN_STID 1 83 #define NFS4_LOCK_STID 2 84 #define NFS4_DELEG_STID 4 85 /* For an open stateid kept around *only* to process close replays: */ 86 #define NFS4_CLOSED_STID 8 87 /* For a deleg stateid kept around only to process free_stateid's: */ 88 #define NFS4_REVOKED_DELEG_STID 16 89 #define NFS4_CLOSED_DELEG_STID 32 90 unsigned char sc_type; 91 stateid_t sc_stateid; 92 struct nfs4_client *sc_client; 93 struct nfs4_file *sc_file; 94 void (*sc_free)(struct nfs4_stid *); 95 }; 96 97 /* 98 * Represents a delegation stateid. The nfs4_client holds references to these 99 * and they are put when it is being destroyed or when the delegation is 100 * returned by the client: 101 * 102 * o 1 reference as long as a delegation is still in force (taken when it's 103 * alloc'd, put when it's returned or revoked) 104 * 105 * o 1 reference as long as a recall rpc is in progress (taken when the lease 106 * is broken, put when the rpc exits) 107 * 108 * o 1 more ephemeral reference for each nfsd thread currently doing something 109 * with that delegation without holding the cl_lock 110 * 111 * If the server attempts to recall a delegation and the client doesn't do so 112 * before a timeout, the server may also revoke the delegation. In that case, 113 * the object will either be destroyed (v4.0) or moved to a per-client list of 114 * revoked delegations (v4.1+). 115 * 116 * This object is a superset of the nfs4_stid. 117 */ 118 struct nfs4_delegation { 119 struct nfs4_stid dl_stid; /* must be first field */ 120 struct list_head dl_perfile; 121 struct list_head dl_perclnt; 122 struct list_head dl_recall_lru; /* delegation recalled */ 123 u32 dl_type; 124 time_t dl_time; 125 /* For recall: */ 126 int dl_retries; 127 struct nfsd4_callback dl_recall; 128 }; 129 130 /* client delegation callback info */ 131 struct nfs4_cb_conn { 132 /* SETCLIENTID info */ 133 struct sockaddr_storage cb_addr; 134 struct sockaddr_storage cb_saddr; 135 size_t cb_addrlen; 136 u32 cb_prog; /* used only in 4.0 case; 137 per-session otherwise */ 138 u32 cb_ident; /* minorversion 0 only */ 139 struct svc_xprt *cb_xprt; /* minorversion 1 only */ 140 }; 141 142 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s) 143 { 144 return container_of(s, struct nfs4_delegation, dl_stid); 145 } 146 147 /* Maximum number of slots per session. 160 is useful for long haul TCP */ 148 #define NFSD_MAX_SLOTS_PER_SESSION 160 149 /* Maximum number of operations per session compound */ 150 #define NFSD_MAX_OPS_PER_COMPOUND 16 151 /* Maximum session per slot cache size */ 152 #define NFSD_SLOT_CACHE_SIZE 2048 153 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ 154 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 155 #define NFSD_MAX_MEM_PER_SESSION \ 156 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) 157 158 struct nfsd4_slot { 159 u32 sl_seqid; 160 __be32 sl_status; 161 u32 sl_datalen; 162 u16 sl_opcnt; 163 #define NFSD4_SLOT_INUSE (1 << 0) 164 #define NFSD4_SLOT_CACHETHIS (1 << 1) 165 #define NFSD4_SLOT_INITIALIZED (1 << 2) 166 u8 sl_flags; 167 char sl_data[]; 168 }; 169 170 struct nfsd4_channel_attrs { 171 u32 headerpadsz; 172 u32 maxreq_sz; 173 u32 maxresp_sz; 174 u32 maxresp_cached; 175 u32 maxops; 176 u32 maxreqs; 177 u32 nr_rdma_attrs; 178 u32 rdma_attrs; 179 }; 180 181 struct nfsd4_cb_sec { 182 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ 183 kuid_t uid; 184 kgid_t gid; 185 }; 186 187 struct nfsd4_create_session { 188 clientid_t clientid; 189 struct nfs4_sessionid sessionid; 190 u32 seqid; 191 u32 flags; 192 struct nfsd4_channel_attrs fore_channel; 193 struct nfsd4_channel_attrs back_channel; 194 u32 callback_prog; 195 struct nfsd4_cb_sec cb_sec; 196 }; 197 198 struct nfsd4_backchannel_ctl { 199 u32 bc_cb_program; 200 struct nfsd4_cb_sec bc_cb_sec; 201 }; 202 203 struct nfsd4_bind_conn_to_session { 204 struct nfs4_sessionid sessionid; 205 u32 dir; 206 }; 207 208 /* The single slot clientid cache structure */ 209 struct nfsd4_clid_slot { 210 u32 sl_seqid; 211 __be32 sl_status; 212 struct nfsd4_create_session sl_cr_ses; 213 }; 214 215 struct nfsd4_conn { 216 struct list_head cn_persession; 217 struct svc_xprt *cn_xprt; 218 struct svc_xpt_user cn_xpt_user; 219 struct nfsd4_session *cn_session; 220 /* CDFC4_FORE, CDFC4_BACK: */ 221 unsigned char cn_flags; 222 }; 223 224 /* 225 * Representation of a v4.1+ session. These are refcounted in a similar fashion 226 * to the nfs4_client. References are only taken when the server is actively 227 * working on the object (primarily during the processing of compounds). 228 */ 229 struct nfsd4_session { 230 atomic_t se_ref; 231 struct list_head se_hash; /* hash by sessionid */ 232 struct list_head se_perclnt; 233 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */ 234 #define NFS4_SESSION_DEAD 0x010 235 u32 se_flags; 236 struct nfs4_client *se_client; 237 struct nfs4_sessionid se_sessionid; 238 struct nfsd4_channel_attrs se_fchannel; 239 struct nfsd4_channel_attrs se_bchannel; 240 struct nfsd4_cb_sec se_cb_sec; 241 struct list_head se_conns; 242 u32 se_cb_prog; 243 u32 se_cb_seq_nr; 244 struct nfsd4_slot *se_slots[]; /* forward channel slots */ 245 }; 246 247 /* formatted contents of nfs4_sessionid */ 248 struct nfsd4_sessionid { 249 clientid_t clientid; 250 u32 sequence; 251 u32 reserved; 252 }; 253 254 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ 255 256 /* 257 * struct nfs4_client - one per client. Clientids live here. 258 * 259 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) 260 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. 261 * Each nfsd_net_ns object contains a set of these and they are tracked via 262 * short and long form clientid. They are hashed and searched for under the 263 * per-nfsd_net client_lock spinlock. 264 * 265 * References to it are only held during the processing of compounds, and in 266 * certain other operations. In their "resting state" they have a refcount of 267 * 0. If they are not renewed within a lease period, they become eligible for 268 * destruction by the laundromat. 269 * 270 * These objects can also be destroyed prematurely by the fault injection code, 271 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. 272 * Care is taken *not* to do this however when the objects have an elevated 273 * refcount. 274 * 275 * o Each nfs4_client is hashed by clientid 276 * 277 * o Each nfs4_clients is also hashed by name (the opaque quantity initially 278 * sent by the client to identify itself). 279 * 280 * o cl_perclient list is used to ensure no dangling stateowner references 281 * when we expire the nfs4_client 282 */ 283 struct nfs4_client { 284 struct list_head cl_idhash; /* hash by cl_clientid.id */ 285 struct rb_node cl_namenode; /* link into by-name trees */ 286 struct list_head *cl_ownerstr_hashtbl; 287 struct list_head cl_openowners; 288 struct idr cl_stateids; /* stateid lookup */ 289 struct list_head cl_delegations; 290 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */ 291 struct list_head cl_lru; /* tail queue */ 292 struct xdr_netobj cl_name; /* id generated by client */ 293 nfs4_verifier cl_verifier; /* generated by client */ 294 time_t cl_time; /* time of last lease renewal */ 295 struct sockaddr_storage cl_addr; /* client ipaddress */ 296 bool cl_mach_cred; /* SP4_MACH_CRED in force */ 297 struct svc_cred cl_cred; /* setclientid principal */ 298 clientid_t cl_clientid; /* generated by server */ 299 nfs4_verifier cl_confirm; /* generated by server */ 300 u32 cl_minorversion; 301 302 /* for v4.0 and v4.1 callbacks: */ 303 struct nfs4_cb_conn cl_cb_conn; 304 #define NFSD4_CLIENT_CB_UPDATE (0) 305 #define NFSD4_CLIENT_CB_KILL (1) 306 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ 307 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ 308 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ 309 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 310 1 << NFSD4_CLIENT_CB_KILL) 311 unsigned long cl_flags; 312 struct rpc_cred *cl_cb_cred; 313 struct rpc_clnt *cl_cb_client; 314 u32 cl_cb_ident; 315 #define NFSD4_CB_UP 0 316 #define NFSD4_CB_UNKNOWN 1 317 #define NFSD4_CB_DOWN 2 318 #define NFSD4_CB_FAULT 3 319 int cl_cb_state; 320 struct nfsd4_callback cl_cb_null; 321 struct nfsd4_session *cl_cb_session; 322 struct list_head cl_callbacks; /* list of in-progress callbacks */ 323 324 /* for all client information that callback code might need: */ 325 spinlock_t cl_lock; 326 327 /* for nfs41 */ 328 struct list_head cl_sessions; 329 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ 330 u32 cl_exchange_flags; 331 /* number of rpc's in progress over an associated session: */ 332 atomic_t cl_refcount; 333 334 /* for nfs41 callbacks */ 335 /* We currently support a single back channel with a single slot */ 336 unsigned long cl_cb_slot_busy; 337 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ 338 /* wait here for slots */ 339 struct net *net; 340 }; 341 342 /* struct nfs4_client_reset 343 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl 344 * upon lease reset, or from upcall to state_daemon (to read in state 345 * from non-volitile storage) upon reboot. 346 */ 347 struct nfs4_client_reclaim { 348 struct list_head cr_strhash; /* hash by cr_name */ 349 struct nfs4_client *cr_clp; /* pointer to associated clp */ 350 char cr_recdir[HEXDIR_LEN]; /* recover dir */ 351 }; 352 353 static inline void 354 update_stateid(stateid_t *stateid) 355 { 356 stateid->si_generation++; 357 /* Wraparound recommendation from 3530bis-13 9.1.3.2: */ 358 if (stateid->si_generation == 0) 359 stateid->si_generation = 1; 360 } 361 362 /* A reasonable value for REPLAY_ISIZE was estimated as follows: 363 * The OPEN response, typically the largest, requires 364 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) + 365 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 366 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 367 */ 368 369 #define NFSD4_REPLAY_ISIZE 112 370 371 /* 372 * Replay buffer, where the result of the last seqid-mutating operation 373 * is cached. 374 */ 375 struct nfs4_replay { 376 __be32 rp_status; 377 unsigned int rp_buflen; 378 char *rp_buf; 379 struct knfsd_fh rp_openfh; 380 struct mutex rp_mutex; 381 char rp_ibuf[NFSD4_REPLAY_ISIZE]; 382 }; 383 384 struct nfs4_stateowner; 385 386 struct nfs4_stateowner_operations { 387 void (*so_unhash)(struct nfs4_stateowner *); 388 void (*so_free)(struct nfs4_stateowner *); 389 }; 390 391 /* 392 * A core object that represents either an open or lock owner. The object and 393 * lock owner objects have one of these embedded within them. Refcounts and 394 * other fields common to both owner types are contained within these 395 * structures. 396 */ 397 struct nfs4_stateowner { 398 struct list_head so_strhash; 399 struct list_head so_stateids; 400 struct nfs4_client *so_client; 401 const struct nfs4_stateowner_operations *so_ops; 402 /* after increment in nfsd4_bump_seqid, represents the next 403 * sequence id expected from the client: */ 404 atomic_t so_count; 405 u32 so_seqid; 406 struct xdr_netobj so_owner; /* open owner name */ 407 struct nfs4_replay so_replay; 408 bool so_is_open_owner; 409 }; 410 411 /* 412 * When a file is opened, the client provides an open state owner opaque string 413 * that indicates the "owner" of that open. These objects are refcounted. 414 * References to it are held by each open state associated with it. This object 415 * is a superset of the nfs4_stateowner struct. 416 */ 417 struct nfs4_openowner { 418 struct nfs4_stateowner oo_owner; /* must be first field */ 419 struct list_head oo_perclient; 420 /* 421 * We keep around openowners a little while after last close, 422 * which saves clients from having to confirm, and allows us to 423 * handle close replays if they come soon enough. The close_lru 424 * is a list of such openowners, to be reaped by the laundromat 425 * thread eventually if they remain unused: 426 */ 427 struct list_head oo_close_lru; 428 struct nfs4_ol_stateid *oo_last_closed_stid; 429 time_t oo_time; /* time of placement on so_close_lru */ 430 #define NFS4_OO_CONFIRMED 1 431 unsigned char oo_flags; 432 }; 433 434 /* 435 * Represents a generic "lockowner". Similar to an openowner. References to it 436 * are held by the lock stateids that are created on its behalf. This object is 437 * a superset of the nfs4_stateowner struct (or would be if it needed any extra 438 * fields). 439 */ 440 struct nfs4_lockowner { 441 struct nfs4_stateowner lo_owner; /* must be first element */ 442 }; 443 444 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 445 { 446 return container_of(so, struct nfs4_openowner, oo_owner); 447 } 448 449 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 450 { 451 return container_of(so, struct nfs4_lockowner, lo_owner); 452 } 453 454 /* 455 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 456 * 457 * These objects are global. nfsd only keeps one instance of a nfs4_file per 458 * inode (though it may keep multiple file descriptors open per inode). These 459 * are tracked in the file_hashtbl which is protected by the state_lock 460 * spinlock. 461 */ 462 struct nfs4_file { 463 atomic_t fi_ref; 464 spinlock_t fi_lock; 465 struct hlist_node fi_hash; /* hash by "struct inode *" */ 466 struct list_head fi_stateids; 467 struct list_head fi_delegations; 468 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 469 struct file * fi_fds[3]; 470 /* 471 * Each open or lock stateid contributes 0-4 to the counts 472 * below depending on which bits are set in st_access_bitmap: 473 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 474 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 475 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 476 */ 477 atomic_t fi_access[2]; 478 u32 fi_share_deny; 479 struct file *fi_deleg_file; 480 struct file_lock *fi_lease; 481 atomic_t fi_delegees; 482 struct knfsd_fh fi_fhandle; 483 bool fi_had_conflict; 484 }; 485 486 /* 487 * A generic struct representing either a open or lock stateid. The nfs4_client 488 * holds a reference to each of these objects, and they in turn hold a 489 * reference to their respective stateowners. The client's reference is 490 * released in response to a close or unlock (depending on whether it's an open 491 * or lock stateid) or when the client is being destroyed. 492 * 493 * In the case of v4.0 open stateids, these objects are preserved for a little 494 * while after close in order to handle CLOSE replays. Those are eventually 495 * reclaimed via a LRU scheme by the laundromat. 496 * 497 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 498 * Better suggestions welcome. 499 */ 500 struct nfs4_ol_stateid { 501 struct nfs4_stid st_stid; /* must be first field */ 502 struct list_head st_perfile; 503 struct list_head st_perstateowner; 504 struct list_head st_locks; 505 struct nfs4_stateowner * st_stateowner; 506 unsigned char st_access_bmap; 507 unsigned char st_deny_bmap; 508 struct nfs4_ol_stateid * st_openstp; 509 }; 510 511 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 512 { 513 return container_of(s, struct nfs4_ol_stateid, st_stid); 514 } 515 516 /* flags for preprocess_seqid_op() */ 517 #define RD_STATE 0x00000010 518 #define WR_STATE 0x00000020 519 520 struct nfsd4_compound_state; 521 struct nfsd_net; 522 523 extern __be32 nfs4_preprocess_stateid_op(struct net *net, 524 struct nfsd4_compound_state *cstate, 525 stateid_t *stateid, int flags, struct file **filp); 526 void nfs4_put_stid(struct nfs4_stid *s); 527 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 528 extern void nfs4_release_reclaim(struct nfsd_net *); 529 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, 530 struct nfsd_net *nn); 531 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 532 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 533 extern int set_callback_cred(void); 534 void nfsd4_run_cb_null(struct work_struct *w); 535 void nfsd4_run_cb_recall(struct work_struct *w); 536 extern void nfsd4_probe_callback(struct nfs4_client *clp); 537 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 538 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 539 extern void nfsd4_cb_recall(struct nfs4_delegation *dp); 540 extern int nfsd4_create_callback_queue(void); 541 extern void nfsd4_destroy_callback_queue(void); 542 extern void nfsd4_shutdown_callback(struct nfs4_client *); 543 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 544 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, 545 struct nfsd_net *nn); 546 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); 547 548 /* nfs4recover operations */ 549 extern int nfsd4_client_tracking_init(struct net *net); 550 extern void nfsd4_client_tracking_exit(struct net *net); 551 extern void nfsd4_client_record_create(struct nfs4_client *clp); 552 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 553 extern int nfsd4_client_record_check(struct nfs4_client *clp); 554 extern void nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time); 555 556 /* nfs fault injection functions */ 557 #ifdef CONFIG_NFSD_FAULT_INJECTION 558 int nfsd_fault_inject_init(void); 559 void nfsd_fault_inject_cleanup(void); 560 561 u64 nfsd_inject_print_clients(void); 562 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 563 u64 nfsd_inject_forget_clients(u64); 564 565 u64 nfsd_inject_print_locks(void); 566 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 567 u64 nfsd_inject_forget_locks(u64); 568 569 u64 nfsd_inject_print_openowners(void); 570 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 571 u64 nfsd_inject_forget_openowners(u64); 572 573 u64 nfsd_inject_print_delegations(void); 574 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 575 u64 nfsd_inject_forget_delegations(u64); 576 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 577 u64 nfsd_inject_recall_delegations(u64); 578 #else /* CONFIG_NFSD_FAULT_INJECTION */ 579 static inline int nfsd_fault_inject_init(void) { return 0; } 580 static inline void nfsd_fault_inject_cleanup(void) {} 581 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 582 583 #endif /* NFSD4_STATE_H */ 584