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 bool cb_holds_slot; 74 }; 75 76 struct nfsd4_callback_ops { 77 void (*prepare)(struct nfsd4_callback *); 78 int (*done)(struct nfsd4_callback *, struct rpc_task *); 79 void (*release)(struct nfsd4_callback *); 80 }; 81 82 /* 83 * A core object that represents a "common" stateid. These are generally 84 * embedded within the different (more specific) stateid objects and contain 85 * fields that are of general use to any stateid. 86 */ 87 struct nfs4_stid { 88 refcount_t sc_count; 89 #define NFS4_OPEN_STID 1 90 #define NFS4_LOCK_STID 2 91 #define NFS4_DELEG_STID 4 92 /* For an open stateid kept around *only* to process close replays: */ 93 #define NFS4_CLOSED_STID 8 94 /* For a deleg stateid kept around only to process free_stateid's: */ 95 #define NFS4_REVOKED_DELEG_STID 16 96 #define NFS4_CLOSED_DELEG_STID 32 97 #define NFS4_LAYOUT_STID 64 98 unsigned char sc_type; 99 stateid_t sc_stateid; 100 spinlock_t sc_lock; 101 struct nfs4_client *sc_client; 102 struct nfs4_file *sc_file; 103 void (*sc_free)(struct nfs4_stid *); 104 }; 105 106 /* 107 * Represents a delegation stateid. The nfs4_client holds references to these 108 * and they are put when it is being destroyed or when the delegation is 109 * returned by the client: 110 * 111 * o 1 reference as long as a delegation is still in force (taken when it's 112 * alloc'd, put when it's returned or revoked) 113 * 114 * o 1 reference as long as a recall rpc is in progress (taken when the lease 115 * is broken, put when the rpc exits) 116 * 117 * o 1 more ephemeral reference for each nfsd thread currently doing something 118 * with that delegation without holding the cl_lock 119 * 120 * If the server attempts to recall a delegation and the client doesn't do so 121 * before a timeout, the server may also revoke the delegation. In that case, 122 * the object will either be destroyed (v4.0) or moved to a per-client list of 123 * revoked delegations (v4.1+). 124 * 125 * This object is a superset of the nfs4_stid. 126 */ 127 struct nfs4_delegation { 128 struct nfs4_stid dl_stid; /* must be first field */ 129 struct list_head dl_perfile; 130 struct list_head dl_perclnt; 131 struct list_head dl_recall_lru; /* delegation recalled */ 132 struct nfs4_clnt_odstate *dl_clnt_odstate; 133 u32 dl_type; 134 time_t dl_time; 135 /* For recall: */ 136 int dl_retries; 137 struct nfsd4_callback dl_recall; 138 }; 139 140 #define cb_to_delegation(cb) \ 141 container_of(cb, struct nfs4_delegation, dl_recall) 142 143 /* client delegation callback info */ 144 struct nfs4_cb_conn { 145 /* SETCLIENTID info */ 146 struct sockaddr_storage cb_addr; 147 struct sockaddr_storage cb_saddr; 148 size_t cb_addrlen; 149 u32 cb_prog; /* used only in 4.0 case; 150 per-session otherwise */ 151 u32 cb_ident; /* minorversion 0 only */ 152 struct svc_xprt *cb_xprt; /* minorversion 1 only */ 153 }; 154 155 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s) 156 { 157 return container_of(s, struct nfs4_delegation, dl_stid); 158 } 159 160 /* Maximum number of slots per session. 160 is useful for long haul TCP */ 161 #define NFSD_MAX_SLOTS_PER_SESSION 160 162 /* Maximum number of operations per session compound */ 163 #define NFSD_MAX_OPS_PER_COMPOUND 16 164 /* Maximum session per slot cache size */ 165 #define NFSD_SLOT_CACHE_SIZE 2048 166 /* Maximum number of NFSD_SLOT_CACHE_SIZE slots per session */ 167 #define NFSD_CACHE_SIZE_SLOTS_PER_SESSION 32 168 #define NFSD_MAX_MEM_PER_SESSION \ 169 (NFSD_CACHE_SIZE_SLOTS_PER_SESSION * NFSD_SLOT_CACHE_SIZE) 170 171 struct nfsd4_slot { 172 u32 sl_seqid; 173 __be32 sl_status; 174 struct svc_cred sl_cred; 175 u32 sl_datalen; 176 u16 sl_opcnt; 177 #define NFSD4_SLOT_INUSE (1 << 0) 178 #define NFSD4_SLOT_CACHETHIS (1 << 1) 179 #define NFSD4_SLOT_INITIALIZED (1 << 2) 180 #define NFSD4_SLOT_CACHED (1 << 3) 181 u8 sl_flags; 182 char sl_data[]; 183 }; 184 185 struct nfsd4_channel_attrs { 186 u32 headerpadsz; 187 u32 maxreq_sz; 188 u32 maxresp_sz; 189 u32 maxresp_cached; 190 u32 maxops; 191 u32 maxreqs; 192 u32 nr_rdma_attrs; 193 u32 rdma_attrs; 194 }; 195 196 struct nfsd4_cb_sec { 197 u32 flavor; /* (u32)(-1) used to mean "no valid flavor" */ 198 kuid_t uid; 199 kgid_t gid; 200 }; 201 202 struct nfsd4_create_session { 203 clientid_t clientid; 204 struct nfs4_sessionid sessionid; 205 u32 seqid; 206 u32 flags; 207 struct nfsd4_channel_attrs fore_channel; 208 struct nfsd4_channel_attrs back_channel; 209 u32 callback_prog; 210 struct nfsd4_cb_sec cb_sec; 211 }; 212 213 struct nfsd4_backchannel_ctl { 214 u32 bc_cb_program; 215 struct nfsd4_cb_sec bc_cb_sec; 216 }; 217 218 struct nfsd4_bind_conn_to_session { 219 struct nfs4_sessionid sessionid; 220 u32 dir; 221 }; 222 223 /* The single slot clientid cache structure */ 224 struct nfsd4_clid_slot { 225 u32 sl_seqid; 226 __be32 sl_status; 227 struct nfsd4_create_session sl_cr_ses; 228 }; 229 230 struct nfsd4_conn { 231 struct list_head cn_persession; 232 struct svc_xprt *cn_xprt; 233 struct svc_xpt_user cn_xpt_user; 234 struct nfsd4_session *cn_session; 235 /* CDFC4_FORE, CDFC4_BACK: */ 236 unsigned char cn_flags; 237 }; 238 239 /* 240 * Representation of a v4.1+ session. These are refcounted in a similar fashion 241 * to the nfs4_client. References are only taken when the server is actively 242 * working on the object (primarily during the processing of compounds). 243 */ 244 struct nfsd4_session { 245 atomic_t se_ref; 246 struct list_head se_hash; /* hash by sessionid */ 247 struct list_head se_perclnt; 248 /* See SESSION4_PERSIST, etc. for standard flags; this is internal-only: */ 249 #define NFS4_SESSION_DEAD 0x010 250 u32 se_flags; 251 struct nfs4_client *se_client; 252 struct nfs4_sessionid se_sessionid; 253 struct nfsd4_channel_attrs se_fchannel; 254 struct nfsd4_channel_attrs se_bchannel; 255 struct nfsd4_cb_sec se_cb_sec; 256 struct list_head se_conns; 257 u32 se_cb_prog; 258 u32 se_cb_seq_nr; 259 struct nfsd4_slot *se_slots[]; /* forward channel slots */ 260 }; 261 262 /* formatted contents of nfs4_sessionid */ 263 struct nfsd4_sessionid { 264 clientid_t clientid; 265 u32 sequence; 266 u32 reserved; 267 }; 268 269 #define HEXDIR_LEN 33 /* hex version of 16 byte md5 of cl_name plus '\0' */ 270 271 /* 272 * struct nfs4_client - one per client. Clientids live here. 273 * 274 * The initial object created by an NFS client using SETCLIENTID (for NFSv4.0) 275 * or EXCHANGE_ID (for NFSv4.1+). These objects are refcounted and timestamped. 276 * Each nfsd_net_ns object contains a set of these and they are tracked via 277 * short and long form clientid. They are hashed and searched for under the 278 * per-nfsd_net client_lock spinlock. 279 * 280 * References to it are only held during the processing of compounds, and in 281 * certain other operations. In their "resting state" they have a refcount of 282 * 0. If they are not renewed within a lease period, they become eligible for 283 * destruction by the laundromat. 284 * 285 * These objects can also be destroyed prematurely by the fault injection code, 286 * or if the client sends certain forms of SETCLIENTID or EXCHANGE_ID updates. 287 * Care is taken *not* to do this however when the objects have an elevated 288 * refcount. 289 * 290 * o Each nfs4_client is hashed by clientid 291 * 292 * o Each nfs4_clients is also hashed by name (the opaque quantity initially 293 * sent by the client to identify itself). 294 * 295 * o cl_perclient list is used to ensure no dangling stateowner references 296 * when we expire the nfs4_client 297 */ 298 struct nfs4_client { 299 struct list_head cl_idhash; /* hash by cl_clientid.id */ 300 struct rb_node cl_namenode; /* link into by-name trees */ 301 struct list_head *cl_ownerstr_hashtbl; 302 struct list_head cl_openowners; 303 struct idr cl_stateids; /* stateid lookup */ 304 struct list_head cl_delegations; 305 struct list_head cl_revoked; /* unacknowledged, revoked 4.1 state */ 306 struct list_head cl_lru; /* tail queue */ 307 #ifdef CONFIG_NFSD_PNFS 308 struct list_head cl_lo_states; /* outstanding layout states */ 309 #endif 310 struct xdr_netobj cl_name; /* id generated by client */ 311 nfs4_verifier cl_verifier; /* generated by client */ 312 time_t cl_time; /* time of last lease renewal */ 313 struct sockaddr_storage cl_addr; /* client ipaddress */ 314 bool cl_mach_cred; /* SP4_MACH_CRED in force */ 315 struct svc_cred cl_cred; /* setclientid principal */ 316 clientid_t cl_clientid; /* generated by server */ 317 nfs4_verifier cl_confirm; /* generated by server */ 318 u32 cl_minorversion; 319 320 /* for v4.0 and v4.1 callbacks: */ 321 struct nfs4_cb_conn cl_cb_conn; 322 #define NFSD4_CLIENT_CB_UPDATE (0) 323 #define NFSD4_CLIENT_CB_KILL (1) 324 #define NFSD4_CLIENT_STABLE (2) /* client on stable storage */ 325 #define NFSD4_CLIENT_RECLAIM_COMPLETE (3) /* reclaim_complete done */ 326 #define NFSD4_CLIENT_CONFIRMED (4) /* client is confirmed */ 327 #define NFSD4_CLIENT_UPCALL_LOCK (5) /* upcall serialization */ 328 #define NFSD4_CLIENT_CB_FLAG_MASK (1 << NFSD4_CLIENT_CB_UPDATE | \ 329 1 << NFSD4_CLIENT_CB_KILL) 330 unsigned long cl_flags; 331 const struct cred *cl_cb_cred; 332 struct rpc_clnt *cl_cb_client; 333 u32 cl_cb_ident; 334 #define NFSD4_CB_UP 0 335 #define NFSD4_CB_UNKNOWN 1 336 #define NFSD4_CB_DOWN 2 337 #define NFSD4_CB_FAULT 3 338 int cl_cb_state; 339 struct nfsd4_callback cl_cb_null; 340 struct nfsd4_session *cl_cb_session; 341 342 /* for all client information that callback code might need: */ 343 spinlock_t cl_lock; 344 345 /* for nfs41 */ 346 struct list_head cl_sessions; 347 struct nfsd4_clid_slot cl_cs_slot; /* create_session slot */ 348 u32 cl_exchange_flags; 349 /* number of rpc's in progress over an associated session: */ 350 atomic_t cl_refcount; 351 struct nfs4_op_map cl_spo_must_allow; 352 353 /* for nfs41 callbacks */ 354 /* We currently support a single back channel with a single slot */ 355 unsigned long cl_cb_slot_busy; 356 struct rpc_wait_queue cl_cb_waitq; /* backchannel callers may */ 357 /* wait here for slots */ 358 struct net *net; 359 struct list_head async_copies; /* list of async copies */ 360 spinlock_t async_lock; /* lock for async copies */ 361 }; 362 363 /* struct nfs4_client_reset 364 * one per old client. Populates reset_str_hashtbl. Filled from conf_id_hashtbl 365 * upon lease reset, or from upcall to state_daemon (to read in state 366 * from non-volitile storage) upon reboot. 367 */ 368 struct nfs4_client_reclaim { 369 struct list_head cr_strhash; /* hash by cr_name */ 370 struct nfs4_client *cr_clp; /* pointer to associated clp */ 371 struct xdr_netobj cr_name; /* recovery dir name */ 372 }; 373 374 /* A reasonable value for REPLAY_ISIZE was estimated as follows: 375 * The OPEN response, typically the largest, requires 376 * 4(status) + 8(stateid) + 20(changeinfo) + 4(rflags) + 8(verifier) + 377 * 4(deleg. type) + 8(deleg. stateid) + 4(deleg. recall flag) + 378 * 20(deleg. space limit) + ~32(deleg. ace) = 112 bytes 379 */ 380 381 #define NFSD4_REPLAY_ISIZE 112 382 383 /* 384 * Replay buffer, where the result of the last seqid-mutating operation 385 * is cached. 386 */ 387 struct nfs4_replay { 388 __be32 rp_status; 389 unsigned int rp_buflen; 390 char *rp_buf; 391 struct knfsd_fh rp_openfh; 392 struct mutex rp_mutex; 393 char rp_ibuf[NFSD4_REPLAY_ISIZE]; 394 }; 395 396 struct nfs4_stateowner; 397 398 struct nfs4_stateowner_operations { 399 void (*so_unhash)(struct nfs4_stateowner *); 400 void (*so_free)(struct nfs4_stateowner *); 401 }; 402 403 /* 404 * A core object that represents either an open or lock owner. The object and 405 * lock owner objects have one of these embedded within them. Refcounts and 406 * other fields common to both owner types are contained within these 407 * structures. 408 */ 409 struct nfs4_stateowner { 410 struct list_head so_strhash; 411 struct list_head so_stateids; 412 struct nfs4_client *so_client; 413 const struct nfs4_stateowner_operations *so_ops; 414 /* after increment in nfsd4_bump_seqid, represents the next 415 * sequence id expected from the client: */ 416 atomic_t so_count; 417 u32 so_seqid; 418 struct xdr_netobj so_owner; /* open owner name */ 419 struct nfs4_replay so_replay; 420 bool so_is_open_owner; 421 }; 422 423 /* 424 * When a file is opened, the client provides an open state owner opaque string 425 * that indicates the "owner" of that open. These objects are refcounted. 426 * References to it are held by each open state associated with it. This object 427 * is a superset of the nfs4_stateowner struct. 428 */ 429 struct nfs4_openowner { 430 struct nfs4_stateowner oo_owner; /* must be first field */ 431 struct list_head oo_perclient; 432 /* 433 * We keep around openowners a little while after last close, 434 * which saves clients from having to confirm, and allows us to 435 * handle close replays if they come soon enough. The close_lru 436 * is a list of such openowners, to be reaped by the laundromat 437 * thread eventually if they remain unused: 438 */ 439 struct list_head oo_close_lru; 440 struct nfs4_ol_stateid *oo_last_closed_stid; 441 time_t oo_time; /* time of placement on so_close_lru */ 442 #define NFS4_OO_CONFIRMED 1 443 unsigned char oo_flags; 444 }; 445 446 /* 447 * Represents a generic "lockowner". Similar to an openowner. References to it 448 * are held by the lock stateids that are created on its behalf. This object is 449 * a superset of the nfs4_stateowner struct. 450 */ 451 struct nfs4_lockowner { 452 struct nfs4_stateowner lo_owner; /* must be first element */ 453 struct list_head lo_blocked; /* blocked file_locks */ 454 }; 455 456 static inline struct nfs4_openowner * openowner(struct nfs4_stateowner *so) 457 { 458 return container_of(so, struct nfs4_openowner, oo_owner); 459 } 460 461 static inline struct nfs4_lockowner * lockowner(struct nfs4_stateowner *so) 462 { 463 return container_of(so, struct nfs4_lockowner, lo_owner); 464 } 465 466 /* 467 * Per-client state indicating no. of opens and outstanding delegations 468 * on a file from a particular client.'od' stands for 'open & delegation' 469 */ 470 struct nfs4_clnt_odstate { 471 struct nfs4_client *co_client; 472 struct nfs4_file *co_file; 473 struct list_head co_perfile; 474 refcount_t co_odcount; 475 }; 476 477 /* 478 * nfs4_file: a file opened by some number of (open) nfs4_stateowners. 479 * 480 * These objects are global. nfsd keeps one instance of a nfs4_file per 481 * filehandle (though it may keep multiple file descriptors for each). Each 482 * inode can have multiple filehandles associated with it, so there is 483 * (potentially) a many to one relationship between this struct and struct 484 * inode. 485 * 486 * These are hashed by filehandle in the file_hashtbl, which is protected by 487 * the global state_lock spinlock. 488 */ 489 struct nfs4_file { 490 refcount_t fi_ref; 491 spinlock_t fi_lock; 492 struct hlist_node fi_hash; /* hash on fi_fhandle */ 493 struct list_head fi_stateids; 494 union { 495 struct list_head fi_delegations; 496 struct rcu_head fi_rcu; 497 }; 498 struct list_head fi_clnt_odstate; 499 /* One each for O_RDONLY, O_WRONLY, O_RDWR: */ 500 struct file * fi_fds[3]; 501 /* 502 * Each open or lock stateid contributes 0-4 to the counts 503 * below depending on which bits are set in st_access_bitmap: 504 * 1 to fi_access[O_RDONLY] if NFS4_SHARE_ACCES_READ is set 505 * + 1 to fi_access[O_WRONLY] if NFS4_SHARE_ACCESS_WRITE is set 506 * + 1 to both of the above if NFS4_SHARE_ACCESS_BOTH is set. 507 */ 508 atomic_t fi_access[2]; 509 u32 fi_share_deny; 510 struct file *fi_deleg_file; 511 int fi_delegees; 512 struct knfsd_fh fi_fhandle; 513 bool fi_had_conflict; 514 #ifdef CONFIG_NFSD_PNFS 515 struct list_head fi_lo_states; 516 atomic_t fi_lo_recalls; 517 #endif 518 }; 519 520 /* 521 * A generic struct representing either a open or lock stateid. The nfs4_client 522 * holds a reference to each of these objects, and they in turn hold a 523 * reference to their respective stateowners. The client's reference is 524 * released in response to a close or unlock (depending on whether it's an open 525 * or lock stateid) or when the client is being destroyed. 526 * 527 * In the case of v4.0 open stateids, these objects are preserved for a little 528 * while after close in order to handle CLOSE replays. Those are eventually 529 * reclaimed via a LRU scheme by the laundromat. 530 * 531 * This object is a superset of the nfs4_stid. "ol" stands for "Open or Lock". 532 * Better suggestions welcome. 533 */ 534 struct nfs4_ol_stateid { 535 struct nfs4_stid st_stid; 536 struct list_head st_perfile; 537 struct list_head st_perstateowner; 538 struct list_head st_locks; 539 struct nfs4_stateowner *st_stateowner; 540 struct nfs4_clnt_odstate *st_clnt_odstate; 541 unsigned char st_access_bmap; 542 unsigned char st_deny_bmap; 543 struct nfs4_ol_stateid *st_openstp; 544 struct mutex st_mutex; 545 }; 546 547 static inline struct nfs4_ol_stateid *openlockstateid(struct nfs4_stid *s) 548 { 549 return container_of(s, struct nfs4_ol_stateid, st_stid); 550 } 551 552 struct nfs4_layout_stateid { 553 struct nfs4_stid ls_stid; 554 struct list_head ls_perclnt; 555 struct list_head ls_perfile; 556 spinlock_t ls_lock; 557 struct list_head ls_layouts; 558 u32 ls_layout_type; 559 struct file *ls_file; 560 struct nfsd4_callback ls_recall; 561 stateid_t ls_recall_sid; 562 bool ls_recalled; 563 struct mutex ls_mutex; 564 }; 565 566 static inline struct nfs4_layout_stateid *layoutstateid(struct nfs4_stid *s) 567 { 568 return container_of(s, struct nfs4_layout_stateid, ls_stid); 569 } 570 571 /* flags for preprocess_seqid_op() */ 572 #define RD_STATE 0x00000010 573 #define WR_STATE 0x00000020 574 575 enum nfsd4_cb_op { 576 NFSPROC4_CLNT_CB_NULL = 0, 577 NFSPROC4_CLNT_CB_RECALL, 578 NFSPROC4_CLNT_CB_LAYOUT, 579 NFSPROC4_CLNT_CB_OFFLOAD, 580 NFSPROC4_CLNT_CB_SEQUENCE, 581 NFSPROC4_CLNT_CB_NOTIFY_LOCK, 582 }; 583 584 /* Returns true iff a is later than b: */ 585 static inline bool nfsd4_stateid_generation_after(stateid_t *a, stateid_t *b) 586 { 587 return (s32)(a->si_generation - b->si_generation) > 0; 588 } 589 590 /* 591 * When a client tries to get a lock on a file, we set one of these objects 592 * on the blocking lock. When the lock becomes free, we can then issue a 593 * CB_NOTIFY_LOCK to the server. 594 */ 595 struct nfsd4_blocked_lock { 596 struct list_head nbl_list; 597 struct list_head nbl_lru; 598 unsigned long nbl_time; 599 struct file_lock nbl_lock; 600 struct knfsd_fh nbl_fh; 601 struct nfsd4_callback nbl_cb; 602 }; 603 604 struct nfsd4_compound_state; 605 struct nfsd_net; 606 struct nfsd4_copy; 607 608 extern __be32 nfs4_preprocess_stateid_op(struct svc_rqst *rqstp, 609 struct nfsd4_compound_state *cstate, struct svc_fh *fhp, 610 stateid_t *stateid, int flags, struct file **filp, bool *tmp_file); 611 __be32 nfsd4_lookup_stateid(struct nfsd4_compound_state *cstate, 612 stateid_t *stateid, unsigned char typemask, 613 struct nfs4_stid **s, struct nfsd_net *nn); 614 struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *slab, 615 void (*sc_free)(struct nfs4_stid *)); 616 int nfs4_init_cp_state(struct nfsd_net *nn, struct nfsd4_copy *copy); 617 void nfs4_free_cp_state(struct nfsd4_copy *copy); 618 void nfs4_unhash_stid(struct nfs4_stid *s); 619 void nfs4_put_stid(struct nfs4_stid *s); 620 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid); 621 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *); 622 extern void nfs4_release_reclaim(struct nfsd_net *); 623 extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name, 624 struct nfsd_net *nn); 625 extern __be32 nfs4_check_open_reclaim(clientid_t *clid, 626 struct nfsd4_compound_state *cstate, struct nfsd_net *nn); 627 extern void nfsd4_probe_callback(struct nfs4_client *clp); 628 extern void nfsd4_probe_callback_sync(struct nfs4_client *clp); 629 extern void nfsd4_change_callback(struct nfs4_client *clp, struct nfs4_cb_conn *); 630 extern void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp, 631 const struct nfsd4_callback_ops *ops, enum nfsd4_cb_op op); 632 extern void nfsd4_run_cb(struct nfsd4_callback *cb); 633 extern int nfsd4_create_callback_queue(void); 634 extern void nfsd4_destroy_callback_queue(void); 635 extern void nfsd4_shutdown_callback(struct nfs4_client *); 636 extern void nfsd4_shutdown_copy(struct nfs4_client *clp); 637 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp); 638 extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name, 639 struct nfsd_net *nn); 640 extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn); 641 642 struct nfs4_file *find_file(struct knfsd_fh *fh); 643 void put_nfs4_file(struct nfs4_file *fi); 644 extern void nfs4_put_copy(struct nfsd4_copy *copy); 645 extern struct nfsd4_copy * 646 find_async_copy(struct nfs4_client *clp, stateid_t *staetid); 647 static inline void get_nfs4_file(struct nfs4_file *fi) 648 { 649 refcount_inc(&fi->fi_ref); 650 } 651 struct file *find_any_file(struct nfs4_file *f); 652 653 /* grace period management */ 654 void nfsd4_end_grace(struct nfsd_net *nn); 655 656 /* nfs4recover operations */ 657 extern int nfsd4_client_tracking_init(struct net *net); 658 extern void nfsd4_client_tracking_exit(struct net *net); 659 extern void nfsd4_client_record_create(struct nfs4_client *clp); 660 extern void nfsd4_client_record_remove(struct nfs4_client *clp); 661 extern int nfsd4_client_record_check(struct nfs4_client *clp); 662 extern void nfsd4_record_grace_done(struct nfsd_net *nn); 663 664 /* nfs fault injection functions */ 665 #ifdef CONFIG_NFSD_FAULT_INJECTION 666 int nfsd_fault_inject_init(void); 667 void nfsd_fault_inject_cleanup(void); 668 669 u64 nfsd_inject_print_clients(void); 670 u64 nfsd_inject_forget_client(struct sockaddr_storage *, size_t); 671 u64 nfsd_inject_forget_clients(u64); 672 673 u64 nfsd_inject_print_locks(void); 674 u64 nfsd_inject_forget_client_locks(struct sockaddr_storage *, size_t); 675 u64 nfsd_inject_forget_locks(u64); 676 677 u64 nfsd_inject_print_openowners(void); 678 u64 nfsd_inject_forget_client_openowners(struct sockaddr_storage *, size_t); 679 u64 nfsd_inject_forget_openowners(u64); 680 681 u64 nfsd_inject_print_delegations(void); 682 u64 nfsd_inject_forget_client_delegations(struct sockaddr_storage *, size_t); 683 u64 nfsd_inject_forget_delegations(u64); 684 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t); 685 u64 nfsd_inject_recall_delegations(u64); 686 #else /* CONFIG_NFSD_FAULT_INJECTION */ 687 static inline int nfsd_fault_inject_init(void) { return 0; } 688 static inline void nfsd_fault_inject_cleanup(void) {} 689 #endif /* CONFIG_NFSD_FAULT_INJECTION */ 690 691 #endif /* NFSD4_STATE_H */ 692