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/refcount.h> 40 #include <linux/sunrpc/svc_xprt.h> 41 #include "nfsfh.h" 42 43 typedef struct { 44 u32 cl_boot; 45 u32 cl_id; 46 } clientid_t; 47 48 typedef struct { 49 clientid_t so_clid; 50 u32 so_id; 51 } stateid_opaque_t; 52 53 typedef struct { 54 u32 si_generation; 55 stateid_opaque_t si_opaque; 56 } stateid_t; 57 58 #define STATEID_FMT "(%08x/%08x/%08x/%08x)" 59 #define STATEID_VAL(s) \ 60 (s)->si_opaque.so_clid.cl_boot, \ 61 (s)->si_opaque.so_clid.cl_id, \ 62 (s)->si_opaque.so_id, \ 63 (s)->si_generation 64 65 struct nfsd4_callback { 66 struct nfs4_client *cb_clp; 67 struct rpc_message cb_msg; 68 const 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 refcount_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 struct svc_cred sl_cred; 174 u32 sl_datalen; 175 u16 sl_opcnt; 176 #define NFSD4_SLOT_INUSE (1 << 0) 177 #define NFSD4_SLOT_CACHETHIS (1 << 1) 178 #define NFSD4_SLOT_INITIALIZED (1 << 2) 179 #define NFSD4_SLOT_CACHED (1 << 3) 180 u8 sl_flags; 181 char sl_data[]; 182 }; 183 184 struct nfsd4_channel_attrs { 185 u32 headerpadsz; 186 u32 maxreq_sz; 187 u32 maxresp_sz; 188 u32 maxresp_cached; 189 u32 maxops; 190 u32 maxreqs; 191 u32 nr_rdma_attrs; 192 u32 rdma_attrs; 193 }; 194 195 struct nfsd4_cb_sec { 196 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ 197 kuid_t uid; 198 kgid_t gid; 199 }; 200 201 struct nfsd4_create_session { 202 clientid_t clientid; 203 struct nfs4_sessionid sessionid; 204 u32 seqid; 205 u32 flags; 206 struct nfsd4_channel_attrs fore_channel; 207 struct nfsd4_channel_attrs back_channel; 208 u32 callback_prog; 209 struct nfsd4_cb_sec cb_sec; 210 }; 211 212 struct nfsd4_backchannel_ctl { 213 u32 bc_cb_program; 214 struct nfsd4_cb_sec bc_cb_sec; 215 }; 216 217 struct nfsd4_bind_conn_to_session { 218 struct nfs4_sessionid sessionid; 219 u32 dir; 220 }; 221 222 /* The single slot clientid cache structure */ 223 struct nfsd4_clid_slot { 224 u32 sl_seqid; 225 __be32 sl_status; 226 struct nfsd4_create_session sl_cr_ses; 227 }; 228 229 struct nfsd4_conn { 230 struct list_head cn_persession; 231 struct svc_xprt *cn_xprt; 232 struct svc_xpt_user cn_xpt_user; 233 struct nfsd4_session *cn_session; 234 /* CDFC4_FORE, CDFC4_BACK: */ 235 unsigned char cn_flags; 236 }; 237 238 /* 239 * Representation of a v4.1+ session. These are refcounted in a similar fashion 240 * to the nfs4_client. References are only taken when the server is actively 241 * working on the object (primarily during the processing of compounds). 242 */ 243 struct nfsd4_session { 244 atomic_t se_ref; 245 struct list_head se_hash; /* hash by sessionid */ 246 struct list_head se_perclnt; 247 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */ 248 #define NFS4_SESSION_DEAD 0x010 249 u32 se_flags; 250 struct nfs4_client *se_client; 251 struct nfs4_sessionid se_sessionid; 252 struct nfsd4_channel_attrs se_fchannel; 253 struct nfsd4_channel_attrs se_bchannel; 254 struct nfsd4_cb_sec se_cb_sec; 255 struct list_head se_conns; 256 u32 se_cb_prog; 257 u32 se_cb_seq_nr; 258 struct nfsd4_slot *se_slots[]; /* forward channel slots */ 259 }; 260 261 /* formatted contents of nfs4_sessionid */ 262 struct nfsd4_sessionid { 263 clientid_t clientid; 264 u32 sequence; 265 u32 reserved; 266 }; 267 268 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ 269 270 /* 271 * struct nfs4_client - one per client. Clientids live here. 272 * 273 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) 274 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. 275 * Each nfsd_net_ns object contains a set of these and they are tracked via 276 * short and long form clientid. They are hashed and searched for under the 277 * per-nfsd_net client_lock spinlock. 278 * 279 * References to it are only held during the processing of compounds, and in 280 * certain other operations. In their "resting state" they have a refcount of 281 * 0. If they are not renewed within a lease period, they become eligible for 282 * destruction by the laundromat. 283 * 284 * These objects can also be destroyed prematurely by the fault injection code, 285 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. 286 * Care is taken *not* to do this however when the objects have an elevated 287 * refcount. 288 * 289 * o Each nfs4_client is hashed by clientid 290 * 291 * o Each nfs4_clients is also hashed by name (the opaque quantity initially 292 * sent by the client to identify itself). 293 * 294 * o cl_perclient list is used to ensure no dangling stateowner references 295 * when we expire the nfs4_client 296 */ 297 struct nfs4_client { 298 struct list_head cl_idhash; /* hash by cl_clientid.id */ 299 struct rb_node cl_namenode; /* link into by-name trees */ 300 struct list_head *cl_ownerstr_hashtbl; 301 struct list_head cl_openowners; 302 struct idr cl_stateids; /* stateid lookup */ 303 struct list_head cl_delegations; 304 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */ 305 struct list_head cl_lru; /* tail queue */ 306 #ifdef CONFIG_NFSD_PNFS 307 struct list_head cl_lo_states; /* outstanding layout states */ 308 #endif 309 struct xdr_netobj cl_name; /* id generated by client */ 310 nfs4_verifier cl_verifier; /* generated by client */ 311 time_t cl_time; /* time of last lease renewal */ 312 struct sockaddr_storage cl_addr; /* client ipaddress */ 313 bool cl_mach_cred; /* SP4_MACH_CRED in force */ 314 struct svc_cred cl_cred; /* setclientid principal */ 315 clientid_t cl_clientid; /* generated by server */ 316 nfs4_verifier cl_confirm; /* generated by server */ 317 u32 cl_minorversion; 318 319 /* for v4.0 and v4.1 callbacks: */ 320 struct nfs4_cb_conn cl_cb_conn; 321 #define NFSD4_CLIENT_CB_UPDATE (0) 322 #define NFSD4_CLIENT_CB_KILL (1) 323 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ 324 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ 325 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ 326 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */ 327 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 328 1 << NFSD4_CLIENT_CB_KILL) 329 unsigned long cl_flags; 330 struct rpc_cred *cl_cb_cred; 331 struct rpc_clnt *cl_cb_client; 332 u32 cl_cb_ident; 333 #define NFSD4_CB_UP 0 334 #define NFSD4_CB_UNKNOWN 1 335 #define NFSD4_CB_DOWN 2 336 #define NFSD4_CB_FAULT 3 337 int cl_cb_state; 338 struct nfsd4_callback cl_cb_null; 339 struct nfsd4_session *cl_cb_session; 340 341 /* for all client information that callback code might need: */ 342 spinlock_t cl_lock; 343 344 /* for nfs41 */ 345 struct list_head cl_sessions; 346 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ 347 u32 cl_exchange_flags; 348 /* number of rpc's in progress over an associated session: */ 349 atomic_t cl_refcount; 350 struct nfs4_op_map cl_spo_must_allow; 351 352 /* for nfs41 callbacks */ 353 /* We currently support a single back channel with a single slot */ 354 unsigned long cl_cb_slot_busy; 355 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ 356 /* wait here for slots */ 357 struct net *net; 358 }; 359 360 /* struct nfs4_client_reset 361 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl 362 * upon lease reset, or from upcall to state_daemon (to read in state 363 * from non-volitile storage) upon reboot. 364 */ 365 struct nfs4_client_reclaim { 366 struct list_head cr_strhash; /* hash by cr_name */ 367 struct nfs4_client *cr_clp; /* pointer to associated clp */ 368 char cr_recdir[HEXDIR_LEN]; /* recover dir */ 369 }; 370 371 /* A reasonable value for REPLAY_ISIZE was estimated as follows: 372 * The OPEN response, typically the largest, requires 373 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) + 374 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 375 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 376 */ 377 378 #define NFSD4_REPLAY_ISIZE 112 379 380 /* 381 * Replay buffer, where the result of the last seqid-mutating operation 382 * is cached. 383 */ 384 struct nfs4_replay { 385 __be32 rp_status; 386 unsigned int rp_buflen; 387 char *rp_buf; 388 struct knfsd_fh rp_openfh; 389 struct mutex rp_mutex; 390 char rp_ibuf[NFSD4_REPLAY_ISIZE]; 391 }; 392 393 struct nfs4_stateowner; 394 395 struct nfs4_stateowner_operations { 396 void (*so_unhash)(struct nfs4_stateowner *); 397 void (*so_free)(struct nfs4_stateowner *); 398 }; 399 400 /* 401 * A core object that represents either an open or lock owner. The object and 402 * lock owner objects have one of these embedded within them. Refcounts and 403 * other fields common to both owner types are contained within these 404 * structures. 405 */ 406 struct nfs4_stateowner { 407 struct list_head so_strhash; 408 struct list_head so_stateids; 409 struct nfs4_client *so_client; 410 const struct nfs4_stateowner_operations *so_ops; 411 /* after increment in nfsd4_bump_seqid, represents the next 412 * sequence id expected from the client: */ 413 atomic_t so_count; 414 u32 so_seqid; 415 struct xdr_netobj so_owner; /* open owner name */ 416 struct nfs4_replay so_replay; 417 bool so_is_open_owner; 418 }; 419 420 /* 421 * When a file is opened, the client provides an open state owner opaque string 422 * that indicates the "owner" of that open. These objects are refcounted. 423 * References to it are held by each open state associated with it. This object 424 * is a superset of the nfs4_stateowner struct. 425 */ 426 struct nfs4_openowner { 427 struct nfs4_stateowner oo_owner; /* must be first field */ 428 struct list_head oo_perclient; 429 /* 430 * We keep around openowners a little while after last close, 431 * which saves clients from having to confirm, and allows us to 432 * handle close replays if they come soon enough. The close_lru 433 * is a list of such openowners, to be reaped by the laundromat 434 * thread eventually if they remain unused: 435 */ 436 struct list_head oo_close_lru; 437 struct nfs4_ol_stateid *oo_last_closed_stid; 438 time_t oo_time; /* time of placement on so_close_lru */ 439 #define NFS4_OO_CONFIRMED 1 440 unsigned char oo_flags; 441 }; 442 443 /* 444 * Represents a generic "lockowner". Similar to an openowner. References to it 445 * are held by the lock stateids that are created on its behalf. This object is 446 * a superset of the nfs4_stateowner struct. 447 */ 448 struct nfs4_lockowner { 449 struct nfs4_stateowner lo_owner; /* must be first element */ 450 struct list_head lo_blocked; /* blocked file_locks */ 451 }; 452 453 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 454 { 455 return container_of(so, struct nfs4_openowner, oo_owner); 456 } 457 458 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 459 { 460 return container_of(so, struct nfs4_lockowner, lo_owner); 461 } 462 463 /* 464 * Per-client state indicating no. of opens and outstanding delegations 465 * on a file from a particular client.'od' stands for 'open & delegation' 466 */ 467 struct nfs4_clnt_odstate { 468 struct nfs4_client *co_client; 469 struct nfs4_file *co_file; 470 struct list_head co_perfile; 471 refcount_t co_odcount; 472 }; 473 474 /* 475 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 476 * 477 * These objects are global. nfsd keeps one instance of a nfs4_file per 478 * filehandle (though it may keep multiple file descriptors for each). Each 479 * inode can have multiple filehandles associated with it, so there is 480 * (potentially) a many to one relationship between this struct and struct 481 * inode. 482 * 483 * These are hashed by filehandle in the file_hashtbl, which is protected by 484 * the global state_lock spinlock. 485 */ 486 struct nfs4_file { 487 refcount_t fi_ref; 488 spinlock_t fi_lock; 489 struct hlist_node fi_hash; /* hash on fi_fhandle */ 490 struct list_head fi_stateids; 491 union { 492 struct list_head fi_delegations; 493 struct rcu_head fi_rcu; 494 }; 495 struct list_head fi_clnt_odstate; 496 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 497 struct file * fi_fds[3]; 498 /* 499 * Each open or lock stateid contributes 0-4 to the counts 500 * below depending on which bits are set in st_access_bitmap: 501 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 502 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 503 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 504 */ 505 atomic_t fi_access[2]; 506 u32 fi_share_deny; 507 struct file *fi_deleg_file; 508 int fi_delegees; 509 struct knfsd_fh fi_fhandle; 510 bool fi_had_conflict; 511 #ifdef CONFIG_NFSD_PNFS 512 struct list_head fi_lo_states; 513 atomic_t fi_lo_recalls; 514 #endif 515 }; 516 517 /* 518 * A generic struct representing either a open or lock stateid. The nfs4_client 519 * holds a reference to each of these objects, and they in turn hold a 520 * reference to their respective stateowners. The client's reference is 521 * released in response to a close or unlock (depending on whether it's an open 522 * or lock stateid) or when the client is being destroyed. 523 * 524 * In the case of v4.0 open stateids, these objects are preserved for a little 525 * while after close in order to handle CLOSE replays. Those are eventually 526 * reclaimed via a LRU scheme by the laundromat. 527 * 528 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 529 * Better suggestions welcome. 530 */ 531 struct nfs4_ol_stateid { 532 struct nfs4_stid st_stid; 533 struct list_head st_perfile; 534 struct list_head st_perstateowner; 535 struct list_head st_locks; 536 struct nfs4_stateowner *st_stateowner; 537 struct nfs4_clnt_odstate *st_clnt_odstate; 538 unsigned char st_access_bmap; 539 unsigned char st_deny_bmap; 540 struct nfs4_ol_stateid *st_openstp; 541 struct mutex st_mutex; 542 }; 543 544 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 545 { 546 return container_of(s, struct nfs4_ol_stateid, st_stid); 547 } 548 549 struct nfs4_layout_stateid { 550 struct nfs4_stid ls_stid; 551 struct list_head ls_perclnt; 552 struct list_head ls_perfile; 553 spinlock_t ls_lock; 554 struct list_head ls_layouts; 555 u32 ls_layout_type; 556 struct file *ls_file; 557 struct nfsd4_callback ls_recall; 558 stateid_t ls_recall_sid; 559 bool ls_recalled; 560 struct mutex ls_mutex; 561 }; 562 563 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s) 564 { 565 return container_of(s, struct nfs4_layout_stateid, ls_stid); 566 } 567 568 /* flags for preprocess_seqid_op() */ 569 #define RD_STATE 0x00000010 570 #define WR_STATE 0x00000020 571 572 enum nfsd4_cb_op { 573 NFSPROC4_CLNT_CB_NULL = 0, 574 NFSPROC4_CLNT_CB_RECALL, 575 NFSPROC4_CLNT_CB_LAYOUT, 576 NFSPROC4_CLNT_CB_SEQUENCE, 577 NFSPROC4_CLNT_CB_NOTIFY_LOCK, 578 }; 579 580 /* Returns true iff a is later than b: */ 581 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b) 582 { 583 return (s32)(a->si_generation - b->si_generation) > 0; 584 } 585 586 /* 587 * When a client tries to get a lock on a file, we set one of these objects 588 * on the blocking lock. When the lock becomes free, we can then issue a 589 * CB_NOTIFY_LOCK to the server. 590 */ 591 struct nfsd4_blocked_lock { 592 struct list_head nbl_list; 593 struct list_head nbl_lru; 594 unsigned long nbl_time; 595 struct file_lock nbl_lock; 596 struct knfsd_fh nbl_fh; 597 struct nfsd4_callback nbl_cb; 598 }; 599 600 struct nfsd4_compound_state; 601 struct nfsd_net; 602 603 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, 604 struct nfsd4_compound_state *cstate, struct svc_fh *fhp, 605 stateid_t *stateid, int flags, struct file **filp, bool *tmp_file); 606 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 607 stateid_t *stateid, unsigned char typemask, 608 struct nfs4_stid **s, struct nfsd_net *nn); 609 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, 610 void (*sc_free)(struct nfs4_stid *)); 611 void nfs4_unhash_stid(struct nfs4_stid *s); 612 void nfs4_put_stid(struct nfs4_stid *s); 613 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid); 614 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 615 extern void nfs4_release_reclaim(struct nfsd_net *); 616 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, 617 struct nfsd_net *nn); 618 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 619 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 620 extern int set_callback_cred(void); 621 extern void cleanup_callback_cred(void); 622 extern void nfsd4_probe_callback(struct nfs4_client *clp); 623 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 624 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 625 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, 626 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op); 627 extern void nfsd4_run_cb(struct nfsd4_callback *cb); 628 extern int nfsd4_create_callback_queue(void); 629 extern void nfsd4_destroy_callback_queue(void); 630 extern void nfsd4_shutdown_callback(struct nfs4_client *); 631 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 632 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, 633 struct nfsd_net *nn); 634 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); 635 636 struct nfs4_file *find_file(struct knfsd_fh *fh); 637 void put_nfs4_file(struct nfs4_file *fi); 638 static inline void get_nfs4_file(struct nfs4_file *fi) 639 { 640 refcount_inc(&fi->fi_ref); 641 } 642 struct file *find_any_file(struct nfs4_file *f); 643 644 /* grace period management */ 645 void nfsd4_end_grace(struct nfsd_net *nn); 646 647 /* nfs4recover operations */ 648 extern int nfsd4_client_tracking_init(struct net *net); 649 extern void nfsd4_client_tracking_exit(struct net *net); 650 extern void nfsd4_client_record_create(struct nfs4_client *clp); 651 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 652 extern int nfsd4_client_record_check(struct nfs4_client *clp); 653 extern void nfsd4_record_grace_done(struct nfsd_net *nn); 654 655 /* nfs fault injection functions */ 656 #ifdef CONFIG_NFSD_FAULT_INJECTION 657 int nfsd_fault_inject_init(void); 658 void nfsd_fault_inject_cleanup(void); 659 660 u64 nfsd_inject_print_clients(void); 661 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 662 u64 nfsd_inject_forget_clients(u64); 663 664 u64 nfsd_inject_print_locks(void); 665 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 666 u64 nfsd_inject_forget_locks(u64); 667 668 u64 nfsd_inject_print_openowners(void); 669 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 670 u64 nfsd_inject_forget_openowners(u64); 671 672 u64 nfsd_inject_print_delegations(void); 673 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 674 u64 nfsd_inject_forget_delegations(u64); 675 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 676 u64 nfsd_inject_recall_delegations(u64); 677 #else /* CONFIG_NFSD_FAULT_INJECTION */ 678 static inline int nfsd_fault_inject_init(void) { return 0; } 679 static inline void nfsd_fault_inject_cleanup(void) {} 680 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 681 682 #endif /* NFSD4_STATE_H */ 683