1 /* 2 * Copyright (c) 2001 The Regents of the University of Michigan. 3 * All rights reserved. 4 * 5 * Kendrick Smith <kmsmith@umich.edu> 6 * Andy Adamson <andros@umich.edu> 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 22 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 23 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 24 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 26 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 27 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR 28 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 29 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 30 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 31 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 32 * 33 */ 34 35 #ifndef _NFSD4_STATE_H 36 #define _NFSD4_STATE_H 37 38 #include <linux/idr.h> 39 #include <linux/sunrpc/svc_xprt.h> 40 #include "nfsfh.h" 41 42 typedef struct { 43 u32 cl_boot; 44 u32 cl_id; 45 } clientid_t; 46 47 typedef struct { 48 clientid_t so_clid; 49 u32 so_id; 50 } stateid_opaque_t; 51 52 typedef struct { 53 u32 si_generation; 54 stateid_opaque_t si_opaque; 55 } stateid_t; 56 57 #define STATEID_FMT "(%08x/%08x/%08x/%08x)" 58 #define STATEID_VAL(s) \ 59 (s)->si_opaque.so_clid.cl_boot, \ 60 (s)->si_opaque.so_clid.cl_id, \ 61 (s)->si_opaque.so_id, \ 62 (s)->si_generation 63 64 struct nfsd4_callback { 65 struct nfs4_client *cb_clp; 66 u32 cb_minorversion; 67 struct rpc_message cb_msg; 68 struct nfsd4_callback_ops *cb_ops; 69 struct work_struct cb_work; 70 int cb_seq_status; 71 int cb_status; 72 bool cb_need_restart; 73 }; 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 spinlock_t sc_lock; 100 struct nfs4_client *sc_client; 101 struct nfs4_file *sc_file; 102 void (*sc_free)(struct nfs4_stid *); 103 }; 104 105 /* 106 * Represents a delegation stateid. The nfs4_client holds references to these 107 * and they are put when it is being destroyed or when the delegation is 108 * returned by the client: 109 * 110 * o 1 reference as long as a delegation is still in force (taken when it's 111 * alloc'd, put when it's returned or revoked) 112 * 113 * o 1 reference as long as a recall rpc is in progress (taken when the lease 114 * is broken, put when the rpc exits) 115 * 116 * o 1 more ephemeral reference for each nfsd thread currently doing something 117 * with that delegation without holding the cl_lock 118 * 119 * If the server attempts to recall a delegation and the client doesn't do so 120 * before a timeout, the server may also revoke the delegation. In that case, 121 * the object will either be destroyed (v4.0) or moved to a per-client list of 122 * revoked delegations (v4.1+). 123 * 124 * This object is a superset of the nfs4_stid. 125 */ 126 struct nfs4_delegation { 127 struct nfs4_stid dl_stid; /* must be first field */ 128 struct list_head dl_perfile; 129 struct list_head dl_perclnt; 130 struct list_head dl_recall_lru; /* delegation recalled */ 131 struct nfs4_clnt_odstate *dl_clnt_odstate; 132 u32 dl_type; 133 time_t dl_time; 134 /* For recall: */ 135 int dl_retries; 136 struct nfsd4_callback dl_recall; 137 }; 138 139 #define cb_to_delegation(cb) \ 140 container_of(cb, struct nfs4_delegation, dl_recall) 141 142 /* client delegation callback info */ 143 struct nfs4_cb_conn { 144 /* SETCLIENTID info */ 145 struct sockaddr_storage cb_addr; 146 struct sockaddr_storage cb_saddr; 147 size_t cb_addrlen; 148 u32 cb_prog; /* used only in 4.0 case; 149 per-session otherwise */ 150 u32 cb_ident; /* minorversion 0 only */ 151 struct svc_xprt *cb_xprt; /* minorversion 1 only */ 152 }; 153 154 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s) 155 { 156 return container_of(s, struct nfs4_delegation, dl_stid); 157 } 158 159 /* Maximum number of slots per session. 160 is useful for long haul TCP */ 160 #define NFSD_MAX_SLOTS_PER_SESSION 160 161 /* Maximum number of operations per session compound */ 162 #define NFSD_MAX_OPS_PER_COMPOUND 16 163 /* Maximum session per slot cache size */ 164 #define NFSD_SLOT_CACHE_SIZE 2048 165 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ 166 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 167 #define NFSD_MAX_MEM_PER_SESSION \ 168 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) 169 170 struct nfsd4_slot { 171 u32 sl_seqid; 172 __be32 sl_status; 173 u32 sl_datalen; 174 u16 sl_opcnt; 175 #define NFSD4_SLOT_INUSE (1 << 0) 176 #define NFSD4_SLOT_CACHETHIS (1 << 1) 177 #define NFSD4_SLOT_INITIALIZED (1 << 2) 178 u8 sl_flags; 179 char sl_data[]; 180 }; 181 182 struct nfsd4_channel_attrs { 183 u32 headerpadsz; 184 u32 maxreq_sz; 185 u32 maxresp_sz; 186 u32 maxresp_cached; 187 u32 maxops; 188 u32 maxreqs; 189 u32 nr_rdma_attrs; 190 u32 rdma_attrs; 191 }; 192 193 struct nfsd4_cb_sec { 194 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ 195 kuid_t uid; 196 kgid_t gid; 197 }; 198 199 struct nfsd4_create_session { 200 clientid_t clientid; 201 struct nfs4_sessionid sessionid; 202 u32 seqid; 203 u32 flags; 204 struct nfsd4_channel_attrs fore_channel; 205 struct nfsd4_channel_attrs back_channel; 206 u32 callback_prog; 207 struct nfsd4_cb_sec cb_sec; 208 }; 209 210 struct nfsd4_backchannel_ctl { 211 u32 bc_cb_program; 212 struct nfsd4_cb_sec bc_cb_sec; 213 }; 214 215 struct nfsd4_bind_conn_to_session { 216 struct nfs4_sessionid sessionid; 217 u32 dir; 218 }; 219 220 /* The single slot clientid cache structure */ 221 struct nfsd4_clid_slot { 222 u32 sl_seqid; 223 __be32 sl_status; 224 struct nfsd4_create_session sl_cr_ses; 225 }; 226 227 struct nfsd4_conn { 228 struct list_head cn_persession; 229 struct svc_xprt *cn_xprt; 230 struct svc_xpt_user cn_xpt_user; 231 struct nfsd4_session *cn_session; 232 /* CDFC4_FORE, CDFC4_BACK: */ 233 unsigned char cn_flags; 234 }; 235 236 /* 237 * Representation of a v4.1+ session. These are refcounted in a similar fashion 238 * to the nfs4_client. References are only taken when the server is actively 239 * working on the object (primarily during the processing of compounds). 240 */ 241 struct nfsd4_session { 242 atomic_t se_ref; 243 struct list_head se_hash; /* hash by sessionid */ 244 struct list_head se_perclnt; 245 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */ 246 #define NFS4_SESSION_DEAD 0x010 247 u32 se_flags; 248 struct nfs4_client *se_client; 249 struct nfs4_sessionid se_sessionid; 250 struct nfsd4_channel_attrs se_fchannel; 251 struct nfsd4_channel_attrs se_bchannel; 252 struct nfsd4_cb_sec se_cb_sec; 253 struct list_head se_conns; 254 u32 se_cb_prog; 255 u32 se_cb_seq_nr; 256 struct nfsd4_slot *se_slots[]; /* forward channel slots */ 257 }; 258 259 /* formatted contents of nfs4_sessionid */ 260 struct nfsd4_sessionid { 261 clientid_t clientid; 262 u32 sequence; 263 u32 reserved; 264 }; 265 266 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ 267 268 /* 269 * struct nfs4_client - one per client. Clientids live here. 270 * 271 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) 272 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. 273 * Each nfsd_net_ns object contains a set of these and they are tracked via 274 * short and long form clientid. They are hashed and searched for under the 275 * per-nfsd_net client_lock spinlock. 276 * 277 * References to it are only held during the processing of compounds, and in 278 * certain other operations. In their "resting state" they have a refcount of 279 * 0. If they are not renewed within a lease period, they become eligible for 280 * destruction by the laundromat. 281 * 282 * These objects can also be destroyed prematurely by the fault injection code, 283 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. 284 * Care is taken *not* to do this however when the objects have an elevated 285 * refcount. 286 * 287 * o Each nfs4_client is hashed by clientid 288 * 289 * o Each nfs4_clients is also hashed by name (the opaque quantity initially 290 * sent by the client to identify itself). 291 * 292 * o cl_perclient list is used to ensure no dangling stateowner references 293 * when we expire the nfs4_client 294 */ 295 struct nfs4_client { 296 struct list_head cl_idhash; /* hash by cl_clientid.id */ 297 struct rb_node cl_namenode; /* link into by-name trees */ 298 struct list_head *cl_ownerstr_hashtbl; 299 struct list_head cl_openowners; 300 struct idr cl_stateids; /* stateid lookup */ 301 struct list_head cl_delegations; 302 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */ 303 struct list_head cl_lru; /* tail queue */ 304 #ifdef CONFIG_NFSD_PNFS 305 struct list_head cl_lo_states; /* outstanding layout states */ 306 #endif 307 struct xdr_netobj cl_name; /* id generated by client */ 308 nfs4_verifier cl_verifier; /* generated by client */ 309 time_t cl_time; /* time of last lease renewal */ 310 struct sockaddr_storage cl_addr; /* client ipaddress */ 311 bool cl_mach_cred; /* SP4_MACH_CRED in force */ 312 struct svc_cred cl_cred; /* setclientid principal */ 313 clientid_t cl_clientid; /* generated by server */ 314 nfs4_verifier cl_confirm; /* generated by server */ 315 u32 cl_minorversion; 316 317 /* for v4.0 and v4.1 callbacks: */ 318 struct nfs4_cb_conn cl_cb_conn; 319 #define NFSD4_CLIENT_CB_UPDATE (0) 320 #define NFSD4_CLIENT_CB_KILL (1) 321 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ 322 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ 323 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ 324 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */ 325 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 326 1 << NFSD4_CLIENT_CB_KILL) 327 unsigned long cl_flags; 328 struct rpc_cred *cl_cb_cred; 329 struct rpc_clnt *cl_cb_client; 330 u32 cl_cb_ident; 331 #define NFSD4_CB_UP 0 332 #define NFSD4_CB_UNKNOWN 1 333 #define NFSD4_CB_DOWN 2 334 #define NFSD4_CB_FAULT 3 335 int cl_cb_state; 336 struct nfsd4_callback cl_cb_null; 337 struct nfsd4_session *cl_cb_session; 338 339 /* for all client information that callback code might need: */ 340 spinlock_t cl_lock; 341 342 /* for nfs41 */ 343 struct list_head cl_sessions; 344 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ 345 u32 cl_exchange_flags; 346 /* number of rpc's in progress over an associated session: */ 347 atomic_t cl_refcount; 348 349 /* for nfs41 callbacks */ 350 /* We currently support a single back channel with a single slot */ 351 unsigned long cl_cb_slot_busy; 352 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ 353 /* wait here for slots */ 354 struct net *net; 355 }; 356 357 /* struct nfs4_client_reset 358 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl 359 * upon lease reset, or from upcall to state_daemon (to read in state 360 * from non-volitile storage) upon reboot. 361 */ 362 struct nfs4_client_reclaim { 363 struct list_head cr_strhash; /* hash by cr_name */ 364 struct nfs4_client *cr_clp; /* pointer to associated clp */ 365 char cr_recdir[HEXDIR_LEN]; /* recover dir */ 366 }; 367 368 /* A reasonable value for REPLAY_ISIZE was estimated as follows: 369 * The OPEN response, typically the largest, requires 370 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) + 371 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 372 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 373 */ 374 375 #define NFSD4_REPLAY_ISIZE 112 376 377 /* 378 * Replay buffer, where the result of the last seqid-mutating operation 379 * is cached. 380 */ 381 struct nfs4_replay { 382 __be32 rp_status; 383 unsigned int rp_buflen; 384 char *rp_buf; 385 struct knfsd_fh rp_openfh; 386 struct mutex rp_mutex; 387 char rp_ibuf[NFSD4_REPLAY_ISIZE]; 388 }; 389 390 struct nfs4_stateowner; 391 392 struct nfs4_stateowner_operations { 393 void (*so_unhash)(struct nfs4_stateowner *); 394 void (*so_free)(struct nfs4_stateowner *); 395 }; 396 397 /* 398 * A core object that represents either an open or lock owner. The object and 399 * lock owner objects have one of these embedded within them. Refcounts and 400 * other fields common to both owner types are contained within these 401 * structures. 402 */ 403 struct nfs4_stateowner { 404 struct list_head so_strhash; 405 struct list_head so_stateids; 406 struct nfs4_client *so_client; 407 const struct nfs4_stateowner_operations *so_ops; 408 /* after increment in nfsd4_bump_seqid, represents the next 409 * sequence id expected from the client: */ 410 atomic_t so_count; 411 u32 so_seqid; 412 struct xdr_netobj so_owner; /* open owner name */ 413 struct nfs4_replay so_replay; 414 bool so_is_open_owner; 415 }; 416 417 /* 418 * When a file is opened, the client provides an open state owner opaque string 419 * that indicates the "owner" of that open. These objects are refcounted. 420 * References to it are held by each open state associated with it. This object 421 * is a superset of the nfs4_stateowner struct. 422 */ 423 struct nfs4_openowner { 424 struct nfs4_stateowner oo_owner; /* must be first field */ 425 struct list_head oo_perclient; 426 /* 427 * We keep around openowners a little while after last close, 428 * which saves clients from having to confirm, and allows us to 429 * handle close replays if they come soon enough. The close_lru 430 * is a list of such openowners, to be reaped by the laundromat 431 * thread eventually if they remain unused: 432 */ 433 struct list_head oo_close_lru; 434 struct nfs4_ol_stateid *oo_last_closed_stid; 435 time_t oo_time; /* time of placement on so_close_lru */ 436 #define NFS4_OO_CONFIRMED 1 437 unsigned char oo_flags; 438 }; 439 440 /* 441 * Represents a generic "lockowner". Similar to an openowner. References to it 442 * are held by the lock stateids that are created on its behalf. This object is 443 * a superset of the nfs4_stateowner struct (or would be if it needed any extra 444 * fields). 445 */ 446 struct nfs4_lockowner { 447 struct nfs4_stateowner lo_owner; /* must be first element */ 448 }; 449 450 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 451 { 452 return container_of(so, struct nfs4_openowner, oo_owner); 453 } 454 455 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 456 { 457 return container_of(so, struct nfs4_lockowner, lo_owner); 458 } 459 460 /* 461 * Per-client state indicating no. of opens and outstanding delegations 462 * on a file from a particular client.'od' stands for 'open & delegation' 463 */ 464 struct nfs4_clnt_odstate { 465 struct nfs4_client *co_client; 466 struct nfs4_file *co_file; 467 struct list_head co_perfile; 468 atomic_t co_odcount; 469 }; 470 471 /* 472 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 473 * 474 * These objects are global. nfsd keeps one instance of a nfs4_file per 475 * filehandle (though it may keep multiple file descriptors for each). Each 476 * inode can have multiple filehandles associated with it, so there is 477 * (potentially) a many to one relationship between this struct and struct 478 * inode. 479 * 480 * These are hashed by filehandle in the file_hashtbl, which is protected by 481 * the global state_lock spinlock. 482 */ 483 struct nfs4_file { 484 atomic_t fi_ref; 485 spinlock_t fi_lock; 486 struct hlist_node fi_hash; /* hash on fi_fhandle */ 487 struct list_head fi_stateids; 488 union { 489 struct list_head fi_delegations; 490 struct rcu_head fi_rcu; 491 }; 492 struct list_head fi_clnt_odstate; 493 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 494 struct file * fi_fds[3]; 495 /* 496 * Each open or lock stateid contributes 0-4 to the counts 497 * below depending on which bits are set in st_access_bitmap: 498 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 499 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 500 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 501 */ 502 atomic_t fi_access[2]; 503 u32 fi_share_deny; 504 struct file *fi_deleg_file; 505 int fi_delegees; 506 struct knfsd_fh fi_fhandle; 507 bool fi_had_conflict; 508 #ifdef CONFIG_NFSD_PNFS 509 struct list_head fi_lo_states; 510 atomic_t fi_lo_recalls; 511 #endif 512 }; 513 514 /* 515 * A generic struct representing either a open or lock stateid. The nfs4_client 516 * holds a reference to each of these objects, and they in turn hold a 517 * reference to their respective stateowners. The client's reference is 518 * released in response to a close or unlock (depending on whether it's an open 519 * or lock stateid) or when the client is being destroyed. 520 * 521 * In the case of v4.0 open stateids, these objects are preserved for a little 522 * while after close in order to handle CLOSE replays. Those are eventually 523 * reclaimed via a LRU scheme by the laundromat. 524 * 525 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 526 * Better suggestions welcome. 527 */ 528 struct nfs4_ol_stateid { 529 struct nfs4_stid st_stid; 530 struct list_head st_perfile; 531 struct list_head st_perstateowner; 532 struct list_head st_locks; 533 struct nfs4_stateowner *st_stateowner; 534 struct nfs4_clnt_odstate *st_clnt_odstate; 535 unsigned char st_access_bmap; 536 unsigned char st_deny_bmap; 537 struct nfs4_ol_stateid *st_openstp; 538 struct rw_semaphore st_rwsem; 539 }; 540 541 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 542 { 543 return container_of(s, struct nfs4_ol_stateid, st_stid); 544 } 545 546 struct nfs4_layout_stateid { 547 struct nfs4_stid ls_stid; 548 struct list_head ls_perclnt; 549 struct list_head ls_perfile; 550 spinlock_t ls_lock; 551 struct list_head ls_layouts; 552 u32 ls_layout_type; 553 struct file *ls_file; 554 struct nfsd4_callback ls_recall; 555 stateid_t ls_recall_sid; 556 bool ls_recalled; 557 struct mutex ls_mutex; 558 }; 559 560 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s) 561 { 562 return container_of(s, struct nfs4_layout_stateid, ls_stid); 563 } 564 565 /* flags for preprocess_seqid_op() */ 566 #define RD_STATE 0x00000010 567 #define WR_STATE 0x00000020 568 569 enum nfsd4_cb_op { 570 NFSPROC4_CLNT_CB_NULL = 0, 571 NFSPROC4_CLNT_CB_RECALL, 572 NFSPROC4_CLNT_CB_LAYOUT, 573 NFSPROC4_CLNT_CB_SEQUENCE, 574 }; 575 576 577 struct nfsd4_compound_state; 578 struct nfsd_net; 579 580 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, 581 struct nfsd4_compound_state *cstate, stateid_t *stateid, 582 int flags, struct file **filp, bool *tmp_file); 583 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 584 stateid_t *stateid, unsigned char typemask, 585 struct nfs4_stid **s, struct nfsd_net *nn); 586 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, 587 struct kmem_cache *slab); 588 void nfs4_unhash_stid(struct nfs4_stid *s); 589 void nfs4_put_stid(struct nfs4_stid *s); 590 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid); 591 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 592 extern void nfs4_release_reclaim(struct nfsd_net *); 593 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, 594 struct nfsd_net *nn); 595 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 596 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 597 extern int set_callback_cred(void); 598 extern void nfsd4_probe_callback(struct nfs4_client *clp); 599 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 600 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 601 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, 602 struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op); 603 extern void nfsd4_run_cb(struct nfsd4_callback *cb); 604 extern int nfsd4_create_callback_queue(void); 605 extern void nfsd4_destroy_callback_queue(void); 606 extern void nfsd4_shutdown_callback(struct nfs4_client *); 607 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 608 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, 609 struct nfsd_net *nn); 610 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); 611 612 struct nfs4_file *find_file(struct knfsd_fh *fh); 613 void put_nfs4_file(struct nfs4_file *fi); 614 static inline void get_nfs4_file(struct nfs4_file *fi) 615 { 616 atomic_inc(&fi->fi_ref); 617 } 618 struct file *find_any_file(struct nfs4_file *f); 619 620 /* grace period management */ 621 void nfsd4_end_grace(struct nfsd_net *nn); 622 623 /* nfs4recover operations */ 624 extern int nfsd4_client_tracking_init(struct net *net); 625 extern void nfsd4_client_tracking_exit(struct net *net); 626 extern void nfsd4_client_record_create(struct nfs4_client *clp); 627 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 628 extern int nfsd4_client_record_check(struct nfs4_client *clp); 629 extern void nfsd4_record_grace_done(struct nfsd_net *nn); 630 631 /* nfs fault injection functions */ 632 #ifdef CONFIG_NFSD_FAULT_INJECTION 633 int nfsd_fault_inject_init(void); 634 void nfsd_fault_inject_cleanup(void); 635 636 u64 nfsd_inject_print_clients(void); 637 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 638 u64 nfsd_inject_forget_clients(u64); 639 640 u64 nfsd_inject_print_locks(void); 641 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 642 u64 nfsd_inject_forget_locks(u64); 643 644 u64 nfsd_inject_print_openowners(void); 645 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 646 u64 nfsd_inject_forget_openowners(u64); 647 648 u64 nfsd_inject_print_delegations(void); 649 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 650 u64 nfsd_inject_forget_delegations(u64); 651 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 652 u64 nfsd_inject_recall_delegations(u64); 653 #else /* CONFIG_NFSD_FAULT_INJECTION */ 654 static inline int nfsd_fault_inject_init(void) { return 0; } 655 static inline void nfsd_fault_inject_cleanup(void) {} 656 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 657 658 #endif /* NFSD4_STATE_H */ 659