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 const struct 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 struct list_head async_copies; /* list of async copies */ 359 spinlock_t async_lock; /* lock for async copies */ 360 }; 361 362 /* struct nfs4_client_reset 363 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl 364 * upon lease reset, or from upcall to state_daemon (to read in state 365 * from non-volitile storage) upon reboot. 366 */ 367 struct nfs4_client_reclaim { 368 struct list_head cr_strhash; /* hash by cr_name */ 369 struct nfs4_client *cr_clp; /* pointer to associated clp */ 370 char cr_recdir[HEXDIR_LEN]; /* recover dir */ 371 }; 372 373 /* A reasonable value for REPLAY_ISIZE was estimated as follows: 374 * The OPEN response, typically the largest, requires 375 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) + 376 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 377 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 378 */ 379 380 #define NFSD4_REPLAY_ISIZE 112 381 382 /* 383 * Replay buffer, where the result of the last seqid-mutating operation 384 * is cached. 385 */ 386 struct nfs4_replay { 387 __be32 rp_status; 388 unsigned int rp_buflen; 389 char *rp_buf; 390 struct knfsd_fh rp_openfh; 391 struct mutex rp_mutex; 392 char rp_ibuf[NFSD4_REPLAY_ISIZE]; 393 }; 394 395 struct nfs4_stateowner; 396 397 struct nfs4_stateowner_operations { 398 void (*so_unhash)(struct nfs4_stateowner *); 399 void (*so_free)(struct nfs4_stateowner *); 400 }; 401 402 /* 403 * A core object that represents either an open or lock owner. The object and 404 * lock owner objects have one of these embedded within them. Refcounts and 405 * other fields common to both owner types are contained within these 406 * structures. 407 */ 408 struct nfs4_stateowner { 409 struct list_head so_strhash; 410 struct list_head so_stateids; 411 struct nfs4_client *so_client; 412 const struct nfs4_stateowner_operations *so_ops; 413 /* after increment in nfsd4_bump_seqid, represents the next 414 * sequence id expected from the client: */ 415 atomic_t so_count; 416 u32 so_seqid; 417 struct xdr_netobj so_owner; /* open owner name */ 418 struct nfs4_replay so_replay; 419 bool so_is_open_owner; 420 }; 421 422 /* 423 * When a file is opened, the client provides an open state owner opaque string 424 * that indicates the "owner" of that open. These objects are refcounted. 425 * References to it are held by each open state associated with it. This object 426 * is a superset of the nfs4_stateowner struct. 427 */ 428 struct nfs4_openowner { 429 struct nfs4_stateowner oo_owner; /* must be first field */ 430 struct list_head oo_perclient; 431 /* 432 * We keep around openowners a little while after last close, 433 * which saves clients from having to confirm, and allows us to 434 * handle close replays if they come soon enough. The close_lru 435 * is a list of such openowners, to be reaped by the laundromat 436 * thread eventually if they remain unused: 437 */ 438 struct list_head oo_close_lru; 439 struct nfs4_ol_stateid *oo_last_closed_stid; 440 time_t oo_time; /* time of placement on so_close_lru */ 441 #define NFS4_OO_CONFIRMED 1 442 unsigned char oo_flags; 443 }; 444 445 /* 446 * Represents a generic "lockowner". Similar to an openowner. References to it 447 * are held by the lock stateids that are created on its behalf. This object is 448 * a superset of the nfs4_stateowner struct. 449 */ 450 struct nfs4_lockowner { 451 struct nfs4_stateowner lo_owner; /* must be first element */ 452 struct list_head lo_blocked; /* blocked file_locks */ 453 }; 454 455 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 456 { 457 return container_of(so, struct nfs4_openowner, oo_owner); 458 } 459 460 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 461 { 462 return container_of(so, struct nfs4_lockowner, lo_owner); 463 } 464 465 /* 466 * Per-client state indicating no. of opens and outstanding delegations 467 * on a file from a particular client.'od' stands for 'open & delegation' 468 */ 469 struct nfs4_clnt_odstate { 470 struct nfs4_client *co_client; 471 struct nfs4_file *co_file; 472 struct list_head co_perfile; 473 refcount_t co_odcount; 474 }; 475 476 /* 477 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 478 * 479 * These objects are global. nfsd keeps one instance of a nfs4_file per 480 * filehandle (though it may keep multiple file descriptors for each). Each 481 * inode can have multiple filehandles associated with it, so there is 482 * (potentially) a many to one relationship between this struct and struct 483 * inode. 484 * 485 * These are hashed by filehandle in the file_hashtbl, which is protected by 486 * the global state_lock spinlock. 487 */ 488 struct nfs4_file { 489 refcount_t fi_ref; 490 spinlock_t fi_lock; 491 struct hlist_node fi_hash; /* hash on fi_fhandle */ 492 struct list_head fi_stateids; 493 union { 494 struct list_head fi_delegations; 495 struct rcu_head fi_rcu; 496 }; 497 struct list_head fi_clnt_odstate; 498 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 499 struct file * fi_fds[3]; 500 /* 501 * Each open or lock stateid contributes 0-4 to the counts 502 * below depending on which bits are set in st_access_bitmap: 503 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 504 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 505 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 506 */ 507 atomic_t fi_access[2]; 508 u32 fi_share_deny; 509 struct file *fi_deleg_file; 510 int fi_delegees; 511 struct knfsd_fh fi_fhandle; 512 bool fi_had_conflict; 513 #ifdef CONFIG_NFSD_PNFS 514 struct list_head fi_lo_states; 515 atomic_t fi_lo_recalls; 516 #endif 517 }; 518 519 /* 520 * A generic struct representing either a open or lock stateid. The nfs4_client 521 * holds a reference to each of these objects, and they in turn hold a 522 * reference to their respective stateowners. The client's reference is 523 * released in response to a close or unlock (depending on whether it's an open 524 * or lock stateid) or when the client is being destroyed. 525 * 526 * In the case of v4.0 open stateids, these objects are preserved for a little 527 * while after close in order to handle CLOSE replays. Those are eventually 528 * reclaimed via a LRU scheme by the laundromat. 529 * 530 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 531 * Better suggestions welcome. 532 */ 533 struct nfs4_ol_stateid { 534 struct nfs4_stid st_stid; 535 struct list_head st_perfile; 536 struct list_head st_perstateowner; 537 struct list_head st_locks; 538 struct nfs4_stateowner *st_stateowner; 539 struct nfs4_clnt_odstate *st_clnt_odstate; 540 unsigned char st_access_bmap; 541 unsigned char st_deny_bmap; 542 struct nfs4_ol_stateid *st_openstp; 543 struct mutex st_mutex; 544 }; 545 546 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 547 { 548 return container_of(s, struct nfs4_ol_stateid, st_stid); 549 } 550 551 struct nfs4_layout_stateid { 552 struct nfs4_stid ls_stid; 553 struct list_head ls_perclnt; 554 struct list_head ls_perfile; 555 spinlock_t ls_lock; 556 struct list_head ls_layouts; 557 u32 ls_layout_type; 558 struct file *ls_file; 559 struct nfsd4_callback ls_recall; 560 stateid_t ls_recall_sid; 561 bool ls_recalled; 562 struct mutex ls_mutex; 563 }; 564 565 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s) 566 { 567 return container_of(s, struct nfs4_layout_stateid, ls_stid); 568 } 569 570 /* flags for preprocess_seqid_op() */ 571 #define RD_STATE 0x00000010 572 #define WR_STATE 0x00000020 573 574 enum nfsd4_cb_op { 575 NFSPROC4_CLNT_CB_NULL = 0, 576 NFSPROC4_CLNT_CB_RECALL, 577 NFSPROC4_CLNT_CB_LAYOUT, 578 NFSPROC4_CLNT_CB_OFFLOAD, 579 NFSPROC4_CLNT_CB_SEQUENCE, 580 NFSPROC4_CLNT_CB_NOTIFY_LOCK, 581 }; 582 583 /* Returns true iff a is later than b: */ 584 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b) 585 { 586 return (s32)(a->si_generation - b->si_generation) > 0; 587 } 588 589 /* 590 * When a client tries to get a lock on a file, we set one of these objects 591 * on the blocking lock. When the lock becomes free, we can then issue a 592 * CB_NOTIFY_LOCK to the server. 593 */ 594 struct nfsd4_blocked_lock { 595 struct list_head nbl_list; 596 struct list_head nbl_lru; 597 unsigned long nbl_time; 598 struct file_lock nbl_lock; 599 struct knfsd_fh nbl_fh; 600 struct nfsd4_callback nbl_cb; 601 }; 602 603 struct nfsd4_compound_state; 604 struct nfsd_net; 605 struct nfsd4_copy; 606 607 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, 608 struct nfsd4_compound_state *cstate, struct svc_fh *fhp, 609 stateid_t *stateid, int flags, struct file **filp, bool *tmp_file); 610 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 611 stateid_t *stateid, unsigned char typemask, 612 struct nfs4_stid **s, struct nfsd_net *nn); 613 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, 614 void (*sc_free)(struct nfs4_stid *)); 615 int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy); 616 void nfs4_free_cp_state(struct nfsd4_copy *copy); 617 void nfs4_unhash_stid(struct nfs4_stid *s); 618 void nfs4_put_stid(struct nfs4_stid *s); 619 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid); 620 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 621 extern void nfs4_release_reclaim(struct nfsd_net *); 622 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir, 623 struct nfsd_net *nn); 624 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 625 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 626 extern void nfsd4_probe_callback(struct nfs4_client *clp); 627 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 628 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 629 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, 630 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op); 631 extern void nfsd4_run_cb(struct nfsd4_callback *cb); 632 extern int nfsd4_create_callback_queue(void); 633 extern void nfsd4_destroy_callback_queue(void); 634 extern void nfsd4_shutdown_callback(struct nfs4_client *); 635 extern void nfsd4_shutdown_copy(struct nfs4_client *clp); 636 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 637 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name, 638 struct nfsd_net *nn); 639 extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn); 640 641 struct nfs4_file *find_file(struct knfsd_fh *fh); 642 void put_nfs4_file(struct nfs4_file *fi); 643 extern void nfs4_put_copy(struct nfsd4_copy *copy); 644 extern struct nfsd4_copy * 645 find_async_copy(struct nfs4_client *clp, stateid_t *staetid); 646 static inline void get_nfs4_file(struct nfs4_file *fi) 647 { 648 refcount_inc(&fi->fi_ref); 649 } 650 struct file *find_any_file(struct nfs4_file *f); 651 652 /* grace period management */ 653 void nfsd4_end_grace(struct nfsd_net *nn); 654 655 /* nfs4recover operations */ 656 extern int nfsd4_client_tracking_init(struct net *net); 657 extern void nfsd4_client_tracking_exit(struct net *net); 658 extern void nfsd4_client_record_create(struct nfs4_client *clp); 659 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 660 extern int nfsd4_client_record_check(struct nfs4_client *clp); 661 extern void nfsd4_record_grace_done(struct nfsd_net *nn); 662 663 /* nfs fault injection functions */ 664 #ifdef CONFIG_NFSD_FAULT_INJECTION 665 int nfsd_fault_inject_init(void); 666 void nfsd_fault_inject_cleanup(void); 667 668 u64 nfsd_inject_print_clients(void); 669 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 670 u64 nfsd_inject_forget_clients(u64); 671 672 u64 nfsd_inject_print_locks(void); 673 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 674 u64 nfsd_inject_forget_locks(u64); 675 676 u64 nfsd_inject_print_openowners(void); 677 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 678 u64 nfsd_inject_forget_openowners(u64); 679 680 u64 nfsd_inject_print_delegations(void); 681 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 682 u64 nfsd_inject_forget_delegations(u64); 683 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 684 u64 nfsd_inject_recall_delegations(u64); 685 #else /* CONFIG_NFSD_FAULT_INJECTION */ 686 static inline int nfsd_fault_inject_init(void) { return 0; } 687 static inline void nfsd_fault_inject_cleanup(void) {} 688 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 689 690 #endif /* NFSD4_STATE_H */ 691