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 struct list_head cb_per_client; 67 u32 cb_minorversion; 68 struct rpc_message cb_msg; 69 struct nfsd4_callback_ops *cb_ops; 70 struct work_struct cb_work; 71 bool cb_done; 72 }; 73 74 struct 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 */ 85 struct 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 */ 124 struct 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 u32 dl_type; 130 time_t dl_time; 131 /* For recall: */ 132 int dl_retries; 133 struct nfsd4_callback dl_recall; 134 }; 135 136 #define cb_to_delegation(cb) \ 137 container_of(cb, struct nfs4_delegation, dl_recall) 138 139 /* client delegation callback info */ 140 struct nfs4_cb_conn { 141 /* SETCLIENTID info */ 142 struct sockaddr_storage cb_addr; 143 struct sockaddr_storage cb_saddr; 144 size_t cb_addrlen; 145 u32 cb_prog; /* used only in 4.0 case; 146 per-session otherwise */ 147 u32 cb_ident; /* minorversion 0 only */ 148 struct svc_xprt *cb_xprt; /* minorversion 1 only */ 149 }; 150 151 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s) 152 { 153 return container_of(s, struct nfs4_delegation, dl_stid); 154 } 155 156 /* Maximum number of slots per session. 160 is useful for long haul TCP */ 157 #define NFSD_MAX_SLOTS_PER_SESSION 160 158 /* Maximum number of operations per session compound */ 159 #define NFSD_MAX_OPS_PER_COMPOUND 16 160 /* Maximum session per slot cache size */ 161 #define NFSD_SLOT_CACHE_SIZE 2048 162 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ 163 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 164 #define NFSD_MAX_MEM_PER_SESSION \ 165 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) 166 167 struct nfsd4_slot { 168 u32 sl_seqid; 169 __be32 sl_status; 170 u32 sl_datalen; 171 u16 sl_opcnt; 172 #define NFSD4_SLOT_INUSE (1 << 0) 173 #define NFSD4_SLOT_CACHETHIS (1 << 1) 174 #define NFSD4_SLOT_INITIALIZED (1 << 2) 175 u8 sl_flags; 176 char sl_data[]; 177 }; 178 179 struct nfsd4_channel_attrs { 180 u32 headerpadsz; 181 u32 maxreq_sz; 182 u32 maxresp_sz; 183 u32 maxresp_cached; 184 u32 maxops; 185 u32 maxreqs; 186 u32 nr_rdma_attrs; 187 u32 rdma_attrs; 188 }; 189 190 struct nfsd4_cb_sec { 191 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ 192 kuid_t uid; 193 kgid_t gid; 194 }; 195 196 struct nfsd4_create_session { 197 clientid_t clientid; 198 struct nfs4_sessionid sessionid; 199 u32 seqid; 200 u32 flags; 201 struct nfsd4_channel_attrs fore_channel; 202 struct nfsd4_channel_attrs back_channel; 203 u32 callback_prog; 204 struct nfsd4_cb_sec cb_sec; 205 }; 206 207 struct nfsd4_backchannel_ctl { 208 u32 bc_cb_program; 209 struct nfsd4_cb_sec bc_cb_sec; 210 }; 211 212 struct nfsd4_bind_conn_to_session { 213 struct nfs4_sessionid sessionid; 214 u32 dir; 215 }; 216 217 /* The single slot clientid cache structure */ 218 struct nfsd4_clid_slot { 219 u32 sl_seqid; 220 __be32 sl_status; 221 struct nfsd4_create_session sl_cr_ses; 222 }; 223 224 struct nfsd4_conn { 225 struct list_head cn_persession; 226 struct svc_xprt *cn_xprt; 227 struct svc_xpt_user cn_xpt_user; 228 struct nfsd4_session *cn_session; 229 /* CDFC4_FORE, CDFC4_BACK: */ 230 unsigned char cn_flags; 231 }; 232 233 /* 234 * Representation of a v4.1+ session. These are refcounted in a similar fashion 235 * to the nfs4_client. References are only taken when the server is actively 236 * working on the object (primarily during the processing of compounds). 237 */ 238 struct nfsd4_session { 239 atomic_t se_ref; 240 struct list_head se_hash; /* hash by sessionid */ 241 struct list_head se_perclnt; 242 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */ 243 #define NFS4_SESSION_DEAD 0x010 244 u32 se_flags; 245 struct nfs4_client *se_client; 246 struct nfs4_sessionid se_sessionid; 247 struct nfsd4_channel_attrs se_fchannel; 248 struct nfsd4_channel_attrs se_bchannel; 249 struct nfsd4_cb_sec se_cb_sec; 250 struct list_head se_conns; 251 u32 se_cb_prog; 252 u32 se_cb_seq_nr; 253 struct nfsd4_slot *se_slots[]; /* forward channel slots */ 254 }; 255 256 /* formatted contents of nfs4_sessionid */ 257 struct nfsd4_sessionid { 258 clientid_t clientid; 259 u32 sequence; 260 u32 reserved; 261 }; 262 263 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ 264 265 /* 266 * struct nfs4_client - one per client. Clientids live here. 267 * 268 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) 269 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. 270 * Each nfsd_net_ns object contains a set of these and they are tracked via 271 * short and long form clientid. They are hashed and searched for under the 272 * per-nfsd_net client_lock spinlock. 273 * 274 * References to it are only held during the processing of compounds, and in 275 * certain other operations. In their "resting state" they have a refcount of 276 * 0. If they are not renewed within a lease period, they become eligible for 277 * destruction by the laundromat. 278 * 279 * These objects can also be destroyed prematurely by the fault injection code, 280 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. 281 * Care is taken *not* to do this however when the objects have an elevated 282 * refcount. 283 * 284 * o Each nfs4_client is hashed by clientid 285 * 286 * o Each nfs4_clients is also hashed by name (the opaque quantity initially 287 * sent by the client to identify itself). 288 * 289 * o cl_perclient list is used to ensure no dangling stateowner references 290 * when we expire the nfs4_client 291 */ 292 struct nfs4_client { 293 struct list_head cl_idhash; /* hash by cl_clientid.id */ 294 struct rb_node cl_namenode; /* link into by-name trees */ 295 struct list_head *cl_ownerstr_hashtbl; 296 struct list_head cl_openowners; 297 struct idr cl_stateids; /* stateid lookup */ 298 struct list_head cl_delegations; 299 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */ 300 struct list_head cl_lru; /* tail queue */ 301 #ifdef CONFIG_NFSD_PNFS 302 struct list_head cl_lo_states; /* outstanding layout states */ 303 #endif 304 struct xdr_netobj cl_name; /* id generated by client */ 305 nfs4_verifier cl_verifier; /* generated by client */ 306 time_t cl_time; /* time of last lease renewal */ 307 struct sockaddr_storage cl_addr; /* client ipaddress */ 308 bool cl_mach_cred; /* SP4_MACH_CRED in force */ 309 struct svc_cred cl_cred; /* setclientid principal */ 310 clientid_t cl_clientid; /* generated by server */ 311 nfs4_verifier cl_confirm; /* generated by server */ 312 u32 cl_minorversion; 313 314 /* for v4.0 and v4.1 callbacks: */ 315 struct nfs4_cb_conn cl_cb_conn; 316 #define NFSD4_CLIENT_CB_UPDATE (0) 317 #define NFSD4_CLIENT_CB_KILL (1) 318 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ 319 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ 320 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ 321 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */ 322 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 323 1 << NFSD4_CLIENT_CB_KILL) 324 unsigned long cl_flags; 325 struct rpc_cred *cl_cb_cred; 326 struct rpc_clnt *cl_cb_client; 327 u32 cl_cb_ident; 328 #define NFSD4_CB_UP 0 329 #define NFSD4_CB_UNKNOWN 1 330 #define NFSD4_CB_DOWN 2 331 #define NFSD4_CB_FAULT 3 332 int cl_cb_state; 333 struct nfsd4_callback cl_cb_null; 334 struct nfsd4_session *cl_cb_session; 335 struct list_head cl_callbacks; /* list of in-progress callbacks */ 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 */ 360 struct 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 }; 365 366 static inline void 367 update_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 */ 388 struct 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 }; 396 397 struct nfs4_stateowner; 398 399 struct 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 */ 410 struct 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 */ 430 struct 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 */ 453 struct nfs4_lockowner { 454 struct nfs4_stateowner lo_owner; /* must be first element */ 455 }; 456 457 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 458 { 459 return container_of(so, struct nfs4_openowner, oo_owner); 460 } 461 462 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 463 { 464 return container_of(so, struct nfs4_lockowner, lo_owner); 465 } 466 467 /* 468 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 469 * 470 * These objects are global. nfsd keeps one instance of a nfs4_file per 471 * filehandle (though it may keep multiple file descriptors for each). Each 472 * inode can have multiple filehandles associated with it, so there is 473 * (potentially) a many to one relationship between this struct and struct 474 * inode. 475 * 476 * These are hashed by filehandle in the file_hashtbl, which is protected by 477 * the global state_lock spinlock. 478 */ 479 struct nfs4_file { 480 atomic_t fi_ref; 481 spinlock_t fi_lock; 482 struct hlist_node fi_hash; /* hash on fi_fhandle */ 483 struct list_head fi_stateids; 484 union { 485 struct list_head fi_delegations; 486 struct rcu_head fi_rcu; 487 }; 488 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 489 struct file * fi_fds[3]; 490 /* 491 * Each open or lock stateid contributes 0-4 to the counts 492 * below depending on which bits are set in st_access_bitmap: 493 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 494 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 495 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 496 */ 497 atomic_t fi_access[2]; 498 u32 fi_share_deny; 499 struct file *fi_deleg_file; 500 int fi_delegees; 501 struct knfsd_fh fi_fhandle; 502 bool fi_had_conflict; 503 #ifdef CONFIG_NFSD_PNFS 504 struct list_head fi_lo_states; 505 atomic_t fi_lo_recalls; 506 #endif 507 }; 508 509 /* 510 * A generic struct representing either a open or lock stateid. The nfs4_client 511 * holds a reference to each of these objects, and they in turn hold a 512 * reference to their respective stateowners. The client's reference is 513 * released in response to a close or unlock (depending on whether it's an open 514 * or lock stateid) or when the client is being destroyed. 515 * 516 * In the case of v4.0 open stateids, these objects are preserved for a little 517 * while after close in order to handle CLOSE replays. Those are eventually 518 * reclaimed via a LRU scheme by the laundromat. 519 * 520 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 521 * Better suggestions welcome. 522 */ 523 struct nfs4_ol_stateid { 524 struct nfs4_stid st_stid; /* must be first field */ 525 struct list_head st_perfile; 526 struct list_head st_perstateowner; 527 struct list_head st_locks; 528 struct nfs4_stateowner * st_stateowner; 529 unsigned char st_access_bmap; 530 unsigned char st_deny_bmap; 531 struct nfs4_ol_stateid * st_openstp; 532 }; 533 534 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 535 { 536 return container_of(s, struct nfs4_ol_stateid, st_stid); 537 } 538 539 struct nfs4_layout_stateid { 540 struct nfs4_stid ls_stid; 541 struct list_head ls_perclnt; 542 struct list_head ls_perfile; 543 spinlock_t ls_lock; 544 struct list_head ls_layouts; 545 u32 ls_layout_type; 546 struct file *ls_file; 547 struct nfsd4_callback ls_recall; 548 stateid_t ls_recall_sid; 549 bool ls_recalled; 550 }; 551 552 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s) 553 { 554 return container_of(s, struct nfs4_layout_stateid, ls_stid); 555 } 556 557 /* flags for preprocess_seqid_op() */ 558 #define RD_STATE 0x00000010 559 #define WR_STATE 0x00000020 560 561 enum nfsd4_cb_op { 562 NFSPROC4_CLNT_CB_NULL = 0, 563 NFSPROC4_CLNT_CB_RECALL, 564 NFSPROC4_CLNT_CB_LAYOUT, 565 NFSPROC4_CLNT_CB_SEQUENCE, 566 }; 567 568 569 struct nfsd4_compound_state; 570 struct nfsd_net; 571 572 extern __be32 nfs4_preprocess_stateid_op(struct net *net, 573 struct nfsd4_compound_state *cstate, 574 stateid_t *stateid, int flags, struct file **filp); 575 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 576 stateid_t *stateid, unsigned char typemask, 577 struct nfs4_stid **s, struct nfsd_net *nn); 578 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, 579 struct kmem_cache *slab); 580 void nfs4_unhash_stid(struct nfs4_stid *s); 581 void nfs4_put_stid(struct nfs4_stid *s); 582 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 583 extern void nfs4_release_reclaim(struct nfsd_net *); 584 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, 585 struct nfsd_net *nn); 586 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 587 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 588 extern int set_callback_cred(void); 589 extern void nfsd4_probe_callback(struct nfs4_client *clp); 590 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 591 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 592 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, 593 struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op); 594 extern void nfsd4_run_cb(struct nfsd4_callback *cb); 595 extern int nfsd4_create_callback_queue(void); 596 extern void nfsd4_destroy_callback_queue(void); 597 extern void nfsd4_shutdown_callback(struct nfs4_client *); 598 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 599 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, 600 struct nfsd_net *nn); 601 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); 602 603 struct nfs4_file *find_file(struct knfsd_fh *fh); 604 void put_nfs4_file(struct nfs4_file *fi); 605 static inline void get_nfs4_file(struct nfs4_file *fi) 606 { 607 atomic_inc(&fi->fi_ref); 608 } 609 struct file *find_any_file(struct nfs4_file *f); 610 611 /* grace period management */ 612 void nfsd4_end_grace(struct nfsd_net *nn); 613 614 /* nfs4recover operations */ 615 extern int nfsd4_client_tracking_init(struct net *net); 616 extern void nfsd4_client_tracking_exit(struct net *net); 617 extern void nfsd4_client_record_create(struct nfs4_client *clp); 618 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 619 extern int nfsd4_client_record_check(struct nfs4_client *clp); 620 extern void nfsd4_record_grace_done(struct nfsd_net *nn); 621 622 /* nfs fault injection functions */ 623 #ifdef CONFIG_NFSD_FAULT_INJECTION 624 int nfsd_fault_inject_init(void); 625 void nfsd_fault_inject_cleanup(void); 626 627 u64 nfsd_inject_print_clients(void); 628 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 629 u64 nfsd_inject_forget_clients(u64); 630 631 u64 nfsd_inject_print_locks(void); 632 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 633 u64 nfsd_inject_forget_locks(u64); 634 635 u64 nfsd_inject_print_openowners(void); 636 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 637 u64 nfsd_inject_forget_openowners(u64); 638 639 u64 nfsd_inject_print_delegations(void); 640 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 641 u64 nfsd_inject_forget_delegations(u64); 642 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 643 u64 nfsd_inject_recall_delegations(u64); 644 #else /* CONFIG_NFSD_FAULT_INJECTION */ 645 static inline int nfsd_fault_inject_init(void) { return 0; } 646 static inline void nfsd_fault_inject_cleanup(void) {} 647 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 648 649 #endif /* NFSD4_STATE_H */ 650