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