1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 /* 22 * Copyright 2009 Sun Microsystems, Inc. All rights reserved. 23 * Use is subject to license terms. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 /* 30 * Portions of this source code were derived from Berkeley 4.3 BSD 31 * under license from the Regents of the University of California. 32 */ 33 34 #ifndef _NFS4_CLNT_H 35 #define _NFS4_CLNT_H 36 37 #include <sys/errno.h> 38 #include <sys/types.h> 39 #include <sys/kstat.h> 40 #include <sys/time.h> 41 #include <sys/flock.h> 42 #include <vm/page.h> 43 #include <nfs/nfs4_kprot.h> 44 #include <nfs/nfs4.h> 45 #include <nfs/rnode.h> 46 #include <sys/avl.h> 47 #include <sys/list.h> 48 #include <rpc/auth.h> 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 #define NFS4_SIZE_OK(size) ((size) <= MAXOFFSET_T) 55 56 /* Four states of nfs4_server's lease_valid */ 57 #define NFS4_LEASE_INVALID 0 58 #define NFS4_LEASE_VALID 1 59 #define NFS4_LEASE_UNINITIALIZED 2 60 #define NFS4_LEASE_NOT_STARTED 3 61 62 /* flag to tell the renew thread it should exit */ 63 #define NFS4_THREAD_EXIT 1 64 65 /* Default number of seconds to wait on GRACE and DELAY errors */ 66 #define NFS4ERR_DELAY_TIME 10 67 68 /* Number of hash buckets for open owners for each nfs4_server */ 69 #define NFS4_NUM_OO_BUCKETS 53 70 71 /* Number of freed open owners (per mntinfo4_t) to keep around */ 72 #define NFS4_NUM_FREED_OPEN_OWNERS 8 73 74 /* Number of seconds to wait before retrying a SETCLIENTID(_CONFIRM) op */ 75 #define NFS4_RETRY_SCLID_DELAY 10 76 77 /* Number of times we should retry a SETCLIENTID(_CONFIRM) op */ 78 #define NFS4_NUM_SCLID_RETRIES 3 79 80 /* Number of times we should retry on open after getting NFS4ERR_BAD_SEQID */ 81 #define NFS4_NUM_RETRY_BAD_SEQID 3 82 83 /* 84 * Is the attribute cache valid? If client holds a delegation, then attrs 85 * are by definition valid. If not, then check to see if attrs have timed out. 86 */ 87 #define ATTRCACHE4_VALID(vp) (VTOR4(vp)->r_deleg_type != OPEN_DELEGATE_NONE || \ 88 gethrtime() < VTOR4(vp)->r_time_attr_inval) 89 90 /* 91 * Flags to indicate whether to purge the DNLC for non-directory vnodes 92 * in a call to nfs_purge_caches. 93 */ 94 #define NFS4_NOPURGE_DNLC 0 95 #define NFS4_PURGE_DNLC 1 96 97 /* 98 * Is cache valid? 99 * Swap is always valid, if no attributes (attrtime == 0) or 100 * if mtime matches cached mtime it is valid 101 * NOTE: mtime is now a timestruc_t. 102 * Caller should be holding the rnode r_statelock mutex. 103 */ 104 #define CACHE4_VALID(rp, mtime, fsize) \ 105 ((RTOV4(rp)->v_flag & VISSWAP) == VISSWAP || \ 106 (((mtime).tv_sec == (rp)->r_attr.va_mtime.tv_sec && \ 107 (mtime).tv_nsec == (rp)->r_attr.va_mtime.tv_nsec) && \ 108 ((fsize) == (rp)->r_attr.va_size))) 109 110 /* 111 * Macro to detect forced unmount or a zone shutdown. 112 */ 113 #define FS_OR_ZONE_GONE4(vfsp) \ 114 (((vfsp)->vfs_flag & VFS_UNMOUNTED) || \ 115 zone_status_get(curproc->p_zone) >= ZONE_IS_SHUTTING_DOWN) 116 117 /* 118 * Macro to help determine whether a request failed because the underlying 119 * filesystem has been forcibly unmounted or because of zone shutdown. 120 */ 121 #define NFS4_FRC_UNMT_ERR(err, vfsp) \ 122 ((err) == EIO && FS_OR_ZONE_GONE4((vfsp))) 123 124 /* 125 * Due to the way the address space callbacks are used to execute a delmap, 126 * we must keep track of how many times the same thread has called 127 * VOP_DELMAP()->nfs4_delmap(). This is done by having a list of 128 * nfs4_delmapcall_t's associated with each rnode4_t. This list is protected 129 * by the rnode4_t's r_statelock. The individual elements do not need to be 130 * protected as they will only ever be created, modified and destroyed by 131 * one thread (the call_id). 132 * See nfs4_delmap() for further explanation. 133 */ 134 typedef struct nfs4_delmapcall { 135 kthread_t *call_id; 136 int error; /* error from delmap */ 137 list_node_t call_node; 138 } nfs4_delmapcall_t; 139 140 /* 141 * delmap address space callback args 142 */ 143 typedef struct nfs4_delmap_args { 144 vnode_t *vp; 145 offset_t off; 146 caddr_t addr; 147 size_t len; 148 uint_t prot; 149 uint_t maxprot; 150 uint_t flags; 151 cred_t *cr; 152 nfs4_delmapcall_t *caller; /* to retrieve errors from the cb */ 153 } nfs4_delmap_args_t; 154 155 /* 156 * client side statistics 157 */ 158 /* 159 * Per-zone counters 160 */ 161 struct clstat4 { 162 kstat_named_t calls; /* client requests */ 163 kstat_named_t badcalls; /* rpc failures */ 164 kstat_named_t clgets; /* client handle gets */ 165 kstat_named_t cltoomany; /* client handle cache misses */ 166 #ifdef DEBUG 167 kstat_named_t clalloc; /* number of client handles */ 168 kstat_named_t noresponse; /* server not responding cnt */ 169 kstat_named_t failover; /* server failover count */ 170 kstat_named_t remap; /* server remap count */ 171 #endif 172 }; 173 174 #ifdef DEBUG 175 /* 176 * The following are statistics that describe the behavior of the system as a 177 * whole and don't correspond to any particular zone. 178 */ 179 struct clstat4_debug { 180 kstat_named_t nrnode; /* number of allocated rnodes */ 181 kstat_named_t access; /* size of access cache */ 182 kstat_named_t dirent; /* size of readdir cache */ 183 kstat_named_t dirents; /* size of readdir buf cache */ 184 kstat_named_t reclaim; /* number of reclaims */ 185 kstat_named_t clreclaim; /* number of cl reclaims */ 186 kstat_named_t f_reclaim; /* number of free reclaims */ 187 kstat_named_t a_reclaim; /* number of active reclaims */ 188 kstat_named_t r_reclaim; /* number of rnode reclaims */ 189 kstat_named_t rpath; /* bytes used to store rpaths */ 190 }; 191 extern struct clstat4_debug clstat4_debug; 192 193 #endif 194 195 /* 196 * The NFS specific async_reqs structure. 197 */ 198 199 enum iotype4 { 200 NFS4_READ_AHEAD, 201 NFS4_PUTAPAGE, 202 NFS4_PAGEIO, 203 NFS4_READDIR, 204 NFS4_INACTIVE, 205 NFS4_COMMIT 206 }; 207 #define NFS4_ASYNC_TYPES (NFS4_COMMIT + 1) 208 209 struct nfs4_async_read_req { 210 void (*readahead)(); /* pointer to readahead function */ 211 u_offset_t blkoff; /* offset in file */ 212 struct seg *seg; /* segment to do i/o to */ 213 caddr_t addr; /* address to do i/o to */ 214 }; 215 216 struct nfs4_pageio_req { 217 int (*pageio)(); /* pointer to pageio function */ 218 page_t *pp; /* page list */ 219 u_offset_t io_off; /* offset in file */ 220 uint_t io_len; /* size of request */ 221 int flags; 222 }; 223 224 struct nfs4_readdir_req { 225 int (*readdir)(); /* pointer to readdir function */ 226 struct rddir4_cache *rdc; /* pointer to cache entry to fill */ 227 }; 228 229 struct nfs4_commit_req { 230 void (*commit)(); /* pointer to commit function */ 231 page_t *plist; /* page list */ 232 offset4 offset; /* starting offset */ 233 count4 count; /* size of range to be commited */ 234 }; 235 236 struct nfs4_async_reqs { 237 struct nfs4_async_reqs *a_next; /* pointer to next arg struct */ 238 #ifdef DEBUG 239 kthread_t *a_queuer; /* thread id of queueing thread */ 240 #endif 241 struct vnode *a_vp; /* vnode pointer */ 242 struct cred *a_cred; /* cred pointer */ 243 enum iotype4 a_io; /* i/o type */ 244 union { 245 struct nfs4_async_read_req a_read_args; 246 struct nfs4_pageio_req a_pageio_args; 247 struct nfs4_readdir_req a_readdir_args; 248 struct nfs4_commit_req a_commit_args; 249 } a_args; 250 }; 251 252 #define a_nfs4_readahead a_args.a_read_args.readahead 253 #define a_nfs4_blkoff a_args.a_read_args.blkoff 254 #define a_nfs4_seg a_args.a_read_args.seg 255 #define a_nfs4_addr a_args.a_read_args.addr 256 257 #define a_nfs4_putapage a_args.a_pageio_args.pageio 258 #define a_nfs4_pageio a_args.a_pageio_args.pageio 259 #define a_nfs4_pp a_args.a_pageio_args.pp 260 #define a_nfs4_off a_args.a_pageio_args.io_off 261 #define a_nfs4_len a_args.a_pageio_args.io_len 262 #define a_nfs4_flags a_args.a_pageio_args.flags 263 264 #define a_nfs4_readdir a_args.a_readdir_args.readdir 265 #define a_nfs4_rdc a_args.a_readdir_args.rdc 266 267 #define a_nfs4_commit a_args.a_commit_args.commit 268 #define a_nfs4_plist a_args.a_commit_args.plist 269 #define a_nfs4_offset a_args.a_commit_args.offset 270 #define a_nfs4_count a_args.a_commit_args.count 271 272 /* 273 * Security information 274 */ 275 typedef struct sv_secinfo { 276 uint_t count; /* how many sdata there are */ 277 uint_t index; /* which sdata[index] */ 278 struct sec_data *sdata; 279 } sv_secinfo_t; 280 281 /* 282 * Hash bucket for the mi's open owner list (mi_oo_list). 283 */ 284 typedef struct nfs4_oo_hash_bucket { 285 list_t b_oo_hash_list; 286 kmutex_t b_lock; 287 } nfs4_oo_hash_bucket_t; 288 289 /* 290 * Global array of ctags. 291 */ 292 extern ctag_t nfs4_ctags[]; 293 294 typedef enum nfs4_tag_type { 295 TAG_NONE, 296 TAG_ACCESS, 297 TAG_CLOSE, 298 TAG_CLOSE_LOST, 299 TAG_CLOSE_UNDO, 300 TAG_COMMIT, 301 TAG_DELEGRETURN, 302 TAG_FSINFO, 303 TAG_GET_SYMLINK, 304 TAG_GETATTR, 305 TAG_INACTIVE, 306 TAG_LINK, 307 TAG_LOCK, 308 TAG_LOCK_RECLAIM, 309 TAG_LOCK_RESEND, 310 TAG_LOCK_REINSTATE, 311 TAG_LOCK_UNKNOWN, 312 TAG_LOCKT, 313 TAG_LOCKU, 314 TAG_LOCKU_RESEND, 315 TAG_LOCKU_REINSTATE, 316 TAG_LOOKUP, 317 TAG_LOOKUP_PARENT, 318 TAG_LOOKUP_VALID, 319 TAG_LOOKUP_VPARENT, 320 TAG_MKDIR, 321 TAG_MKNOD, 322 TAG_MOUNT, 323 TAG_OPEN, 324 TAG_OPEN_CONFIRM, 325 TAG_OPEN_CONFIRM_LOST, 326 TAG_OPEN_DG, 327 TAG_OPEN_DG_LOST, 328 TAG_OPEN_LOST, 329 TAG_OPENATTR, 330 TAG_PATHCONF, 331 TAG_PUTROOTFH, 332 TAG_READ, 333 TAG_READAHEAD, 334 TAG_READDIR, 335 TAG_READLINK, 336 TAG_RELOCK, 337 TAG_REMAP_LOOKUP, 338 TAG_REMAP_LOOKUP_AD, 339 TAG_REMAP_LOOKUP_NA, 340 TAG_REMAP_MOUNT, 341 TAG_RMDIR, 342 TAG_REMOVE, 343 TAG_RENAME, 344 TAG_RENAME_VFH, 345 TAG_RENEW, 346 TAG_REOPEN, 347 TAG_REOPEN_LOST, 348 TAG_SECINFO, 349 TAG_SETATTR, 350 TAG_SETCLIENTID, 351 TAG_SETCLIENTID_CF, 352 TAG_SYMLINK, 353 TAG_WRITE 354 } nfs4_tag_type_t; 355 356 #define NFS4_TAG_INITIALIZER { \ 357 {TAG_NONE, "", \ 358 {0x20202020, 0x20202020, 0x20202020}}, \ 359 {TAG_ACCESS, "access", \ 360 {0x61636365, 0x73732020, 0x20202020}}, \ 361 {TAG_CLOSE, "close", \ 362 {0x636c6f73, 0x65202020, 0x20202020}}, \ 363 {TAG_CLOSE_LOST, "lost close", \ 364 {0x6c6f7374, 0x20636c6f, 0x73652020}}, \ 365 {TAG_CLOSE_UNDO, "undo close", \ 366 {0x756e646f, 0x20636c6f, 0x73652020}}, \ 367 {TAG_COMMIT, "commit", \ 368 {0x636f6d6d, 0x69742020, 0x20202020}}, \ 369 {TAG_DELEGRETURN, "delegreturn", \ 370 {0x64656c65, 0x67726574, 0x75726e20}}, \ 371 {TAG_FSINFO, "fsinfo", \ 372 {0x6673696e, 0x666f2020, 0x20202020}}, \ 373 {TAG_GET_SYMLINK, "get symlink text", \ 374 {0x67657420, 0x736c6e6b, 0x20747874}}, \ 375 {TAG_GETATTR, "getattr", \ 376 {0x67657461, 0x74747220, 0x20202020}}, \ 377 {TAG_INACTIVE, "inactive", \ 378 {0x696e6163, 0x74697665, 0x20202020}}, \ 379 {TAG_LINK, "link", \ 380 {0x6c696e6b, 0x20202020, 0x20202020}}, \ 381 {TAG_LOCK, "lock", \ 382 {0x6c6f636b, 0x20202020, 0x20202020}}, \ 383 {TAG_LOCK_RECLAIM, "reclaim lock", \ 384 {0x7265636c, 0x61696d20, 0x6c6f636b}}, \ 385 {TAG_LOCK_RESEND, "resend lock", \ 386 {0x72657365, 0x6e64206c, 0x6f636b20}}, \ 387 {TAG_LOCK_REINSTATE, "reinstate lock", \ 388 {0x7265696e, 0x7374206c, 0x6f636b20}}, \ 389 {TAG_LOCK_UNKNOWN, "unknown lock", \ 390 {0x756e6b6e, 0x6f776e20, 0x6c6f636b}}, \ 391 {TAG_LOCKT, "lock test", \ 392 {0x6c6f636b, 0x5f746573, 0x74202020}}, \ 393 {TAG_LOCKU, "unlock", \ 394 {0x756e6c6f, 0x636b2020, 0x20202020}}, \ 395 {TAG_LOCKU_RESEND, "resend locku", \ 396 {0x72657365, 0x6e64206c, 0x6f636b75}}, \ 397 {TAG_LOCKU_REINSTATE, "reinstate unlock", \ 398 {0x7265696e, 0x73742075, 0x6e6c636b}}, \ 399 {TAG_LOOKUP, "lookup", \ 400 {0x6c6f6f6b, 0x75702020, 0x20202020}}, \ 401 {TAG_LOOKUP_PARENT, "lookup parent", \ 402 {0x6c6f6f6b, 0x75702070, 0x6172656e}}, \ 403 {TAG_LOOKUP_VALID, "lookup valid", \ 404 {0x6c6f6f6b, 0x75702076, 0x616c6964}}, \ 405 {TAG_LOOKUP_VPARENT, "lookup valid parent", \ 406 {0x6c6f6f6b, 0x766c6420, 0x7061726e}}, \ 407 {TAG_MKDIR, "mkdir", \ 408 {0x6d6b6469, 0x72202020, 0x20202020}}, \ 409 {TAG_MKNOD, "mknod", \ 410 {0x6d6b6e6f, 0x64202020, 0x20202020}}, \ 411 {TAG_MOUNT, "mount", \ 412 {0x6d6f756e, 0x74202020, 0x20202020}}, \ 413 {TAG_OPEN, "open", \ 414 {0x6f70656e, 0x20202020, 0x20202020}}, \ 415 {TAG_OPEN_CONFIRM, "open confirm", \ 416 {0x6f70656e, 0x5f636f6e, 0x6669726d}}, \ 417 {TAG_OPEN_CONFIRM_LOST, "lost open confirm", \ 418 {0x6c6f7374, 0x206f7065, 0x6e5f636f}}, \ 419 {TAG_OPEN_DG, "open downgrade", \ 420 {0x6f70656e, 0x20646772, 0x61646520}}, \ 421 {TAG_OPEN_DG_LOST, "lost open downgrade", \ 422 {0x6c737420, 0x6f70656e, 0x20646772}}, \ 423 {TAG_OPEN_LOST, "lost open", \ 424 {0x6c6f7374, 0x206f7065, 0x6e202020}}, \ 425 {TAG_OPENATTR, "openattr", \ 426 {0x6f70656e, 0x61747472, 0x20202020}}, \ 427 {TAG_PATHCONF, "pathhconf", \ 428 {0x70617468, 0x636f6e66, 0x20202020}}, \ 429 {TAG_PUTROOTFH, "putrootfh", \ 430 {0x70757472, 0x6f6f7466, 0x68202020}}, \ 431 {TAG_READ, "read", \ 432 {0x72656164, 0x20202020, 0x20202020}}, \ 433 {TAG_READAHEAD, "readahead", \ 434 {0x72656164, 0x61686561, 0x64202020}}, \ 435 {TAG_READDIR, "readdir", \ 436 {0x72656164, 0x64697220, 0x20202020}}, \ 437 {TAG_READLINK, "readlink", \ 438 {0x72656164, 0x6c696e6b, 0x20202020}}, \ 439 {TAG_RELOCK, "relock", \ 440 {0x72656c6f, 0x636b2020, 0x20202020}}, \ 441 {TAG_REMAP_LOOKUP, "remap lookup", \ 442 {0x72656d61, 0x70206c6f, 0x6f6b7570}}, \ 443 {TAG_REMAP_LOOKUP_AD, "remap lookup attr dir", \ 444 {0x72656d70, 0x206c6b75, 0x70206164}}, \ 445 {TAG_REMAP_LOOKUP_NA, "remap lookup named attrs", \ 446 {0x72656d70, 0x206c6b75, 0x70206e61}}, \ 447 {TAG_REMAP_MOUNT, "remap mount", \ 448 {0x72656d61, 0x70206d6f, 0x756e7420}}, \ 449 {TAG_RMDIR, "rmdir", \ 450 {0x726d6469, 0x72202020, 0x20202020}}, \ 451 {TAG_REMOVE, "remove", \ 452 {0x72656d6f, 0x76652020, 0x20202020}}, \ 453 {TAG_RENAME, "rename", \ 454 {0x72656e61, 0x6d652020, 0x20202020}}, \ 455 {TAG_RENAME_VFH, "rename volatile fh", \ 456 {0x72656e61, 0x6d652028, 0x76666829}}, \ 457 {TAG_RENEW, "renew", \ 458 {0x72656e65, 0x77202020, 0x20202020}}, \ 459 {TAG_REOPEN, "reopen", \ 460 {0x72656f70, 0x656e2020, 0x20202020}}, \ 461 {TAG_REOPEN_LOST, "lost reopen", \ 462 {0x6c6f7374, 0x2072656f, 0x70656e20}}, \ 463 {TAG_SECINFO, "secinfo", \ 464 {0x73656369, 0x6e666f20, 0x20202020}}, \ 465 {TAG_SETATTR, "setattr", \ 466 {0x73657461, 0x74747220, 0x20202020}}, \ 467 {TAG_SETCLIENTID, "setclientid", \ 468 {0x73657463, 0x6c69656e, 0x74696420}}, \ 469 {TAG_SETCLIENTID_CF, "setclientid_confirm", \ 470 {0x73636c6e, 0x7469645f, 0x636f6e66}}, \ 471 {TAG_SYMLINK, "symlink", \ 472 {0x73796d6c, 0x696e6b20, 0x20202020}}, \ 473 {TAG_WRITE, "write", \ 474 {0x77726974, 0x65202020, 0x20202020}} \ 475 } 476 477 /* 478 * These flags are for differentiating the search criterian for 479 * find_open_owner(). The comparison is done with the open_owners's 480 * 'oo_just_created' flag. 481 */ 482 #define NFS4_PERM_CREATED 0x0 483 #define NFS4_JUST_CREATED 0x1 484 485 /* 486 * Hashed by the cr_uid and cr_ruid of credential 'oo_cred'. 'oo_cred_otw' 487 * is stored upon a successful OPEN. This is needed when the user's effective 488 * and real uid's don't match. The 'oo_cred_otw' overrides the credential 489 * passed down by VFS for async read/write, commit, lock, and close operations. 490 * 491 * The oo_ref_count keeps track the number of active references on this 492 * data structure + number of nfs4_open_streams point to this structure. 493 * 494 * 'oo_valid' tells whether this stuct is about to be freed or not. 495 * 496 * 'oo_just_created' tells us whether this struct has just been created but 497 * not been fully finalized (that is created upon an OPEN request and 498 * finalized upon the OPEN success). 499 * 500 * The 'oo_seqid_inuse' is for the open seqid synchronization. If a thread 501 * is currently using the open owner and it's open_seqid, then it sets the 502 * oo_seqid_inuse to true if it currently is not set. If it is set then it 503 * does a cv_wait on the oo_cv_seqid_sync condition variable. When the thread 504 * is done it unsets the oo_seqid_inuse and does a cv_signal to wake a process 505 * waiting on the condition variable. 506 * 507 * 'oo_last_good_seqid' is the last valid seqid this open owner sent OTW, 508 * and 'oo_last_good_op' is the operation that issued the last valid seqid. 509 * 510 * Lock ordering: 511 * mntinfo4_t::mi_lock > oo_lock (for searching mi_oo_list) 512 * 513 * oo_seqid_inuse > mntinfo4_t::mi_lock 514 * oo_seqid_inuse > rnode4_t::r_statelock 515 * oo_seqid_inuse > rnode4_t::r_statev4_lock 516 * oo_seqid_inuse > nfs4_open_stream_t::os_sync_lock 517 * 518 * The 'oo_seqid_inuse'/'oo_cv_seqid_sync' protects: 519 * oo_last_good_op 520 * oo_last_good_seqid 521 * oo_name 522 * oo_seqid 523 * 524 * The 'oo_lock' protects: 525 * oo_cred 526 * oo_cred_otw 527 * oo_foo_node 528 * oo_hash_node 529 * oo_just_created 530 * oo_ref_count 531 * oo_valid 532 */ 533 534 typedef struct nfs4_open_owner { 535 cred_t *oo_cred; 536 int oo_ref_count; 537 int oo_valid; 538 int oo_just_created; 539 seqid4 oo_seqid; 540 seqid4 oo_last_good_seqid; 541 nfs4_tag_type_t oo_last_good_op; 542 unsigned oo_seqid_inuse:1; 543 cred_t *oo_cred_otw; 544 kcondvar_t oo_cv_seqid_sync; 545 /* 546 * Fix this to always be 8 bytes 547 */ 548 uint64_t oo_name; 549 list_node_t oo_hash_node; 550 list_node_t oo_foo_node; 551 kmutex_t oo_lock; 552 } nfs4_open_owner_t; 553 554 /* 555 * Static server information. 556 * These fields are read-only once they are initialized: 557 * sv_addr 558 * sv_dhsec 559 * sv_hostname 560 * sv_hostnamelen 561 * sv_knconf 562 * sv_next 563 * sv_origknconf 564 * 565 * These fields are protected by sv_lock: 566 * sv_currsec 567 * sv_fhandle 568 * sv_flags 569 * sv_fsid 570 * sv_path 571 * sv_pathlen 572 * sv_pfhandle 573 * sv_save_secinfo 574 * sv_savesec 575 * sv_secdata 576 * sv_secinfo 577 * sv_supp_attrs 578 * 579 * Lock ordering: 580 * nfs_rtable4_lock > sv_lock 581 * rnode4_t::r_statelock > sv_lock 582 */ 583 typedef struct servinfo4 { 584 struct knetconfig *sv_knconf; /* bound TLI fd */ 585 struct knetconfig *sv_origknconf; /* For RDMA save orig knconf */ 586 struct netbuf sv_addr; /* server's address */ 587 nfs4_fhandle_t sv_fhandle; /* this server's filehandle */ 588 nfs4_fhandle_t sv_pfhandle; /* parent dir filehandle */ 589 int sv_pathlen; /* Length of server path */ 590 char *sv_path; /* Path name on server */ 591 uint32_t sv_flags; /* flags for this server */ 592 sec_data_t *sv_secdata; /* client initiated security data */ 593 sv_secinfo_t *sv_secinfo; /* server security information */ 594 sec_data_t *sv_currsec; /* security data currently used; */ 595 /* points to one of the sec_data */ 596 /* entries in sv_secinfo */ 597 sv_secinfo_t *sv_save_secinfo; /* saved secinfo */ 598 sec_data_t *sv_savesec; /* saved security data */ 599 sec_data_t *sv_dhsec; /* AUTH_DH data from the user land */ 600 char *sv_hostname; /* server's hostname */ 601 int sv_hostnamelen; /* server's hostname length */ 602 fattr4_fsid sv_fsid; /* fsid of shared obj */ 603 fattr4_supported_attrs sv_supp_attrs; 604 struct servinfo4 *sv_next; /* next in list */ 605 nfs_rwlock_t sv_lock; 606 } servinfo4_t; 607 608 /* sv_flags fields */ 609 #define SV4_TRYSECINFO 0x001 /* try secinfo data from the server */ 610 #define SV4_TRYSECDEFAULT 0x002 /* try a default flavor */ 611 #define SV4_NOTINUSE 0x004 /* servinfo4_t had fatal errors */ 612 #define SV4_ROOT_STALE 0x008 /* root vnode got ESTALE */ 613 614 /* 615 * Lock call types. See nfs4frlock(). 616 */ 617 typedef enum nfs4_lock_call_type { 618 NFS4_LCK_CTYPE_NORM, 619 NFS4_LCK_CTYPE_RECLAIM, 620 NFS4_LCK_CTYPE_RESEND, 621 NFS4_LCK_CTYPE_REINSTATE 622 } nfs4_lock_call_type_t; 623 624 /* 625 * This structure holds the information for a lost open/close/open downgrade/ 626 * lock/locku request. It is also used for requests that are queued up so 627 * that the recovery thread can release server state after a forced 628 * unmount. 629 * "lr_op" is 0 if the struct is uninitialized. Otherwise, it is set to 630 * the proper OP_* nfs_opnum4 number. The other fields contain information 631 * to reconstruct the call. 632 * 633 * lr_dvp is used for OPENs with CREATE, so that we can do a PUTFH of the 634 * parent directroy without relying on vtodv (since we may not have a vp 635 * for the file we wish to create). 636 * 637 * lr_putfirst means that the request should go to the front of the resend 638 * queue, rather than the end. 639 */ 640 typedef struct nfs4_lost_rqst { 641 list_node_t lr_node; 642 nfs_opnum4 lr_op; 643 vnode_t *lr_vp; 644 vnode_t *lr_dvp; 645 nfs4_open_owner_t *lr_oop; 646 struct nfs4_open_stream *lr_osp; 647 struct nfs4_lock_owner *lr_lop; 648 cred_t *lr_cr; 649 flock64_t *lr_flk; 650 bool_t lr_putfirst; 651 union { 652 struct { 653 nfs4_lock_call_type_t lru_ctype; 654 nfs_lock_type4 lru_locktype; 655 } lru_lockargs; /* LOCK, LOCKU */ 656 struct { 657 uint32_t lru_oaccess; 658 uint32_t lru_odeny; 659 enum open_claim_type4 lru_oclaim; 660 stateid4 lru_ostateid; /* reopen only */ 661 component4 lru_ofile; 662 } lru_open_args; 663 struct { 664 uint32_t lru_dg_access; 665 uint32_t lru_dg_deny; 666 } lru_open_dg_args; 667 } nfs4_lr_u; 668 } nfs4_lost_rqst_t; 669 670 #define lr_oacc nfs4_lr_u.lru_open_args.lru_oaccess 671 #define lr_odeny nfs4_lr_u.lru_open_args.lru_odeny 672 #define lr_oclaim nfs4_lr_u.lru_open_args.lru_oclaim 673 #define lr_ostateid nfs4_lr_u.lru_open_args.lru_ostateid 674 #define lr_ofile nfs4_lr_u.lru_open_args.lru_ofile 675 #define lr_dg_acc nfs4_lr_u.lru_open_dg_args.lru_dg_access 676 #define lr_dg_deny nfs4_lr_u.lru_open_dg_args.lru_dg_deny 677 #define lr_ctype nfs4_lr_u.lru_lockargs.lru_ctype 678 #define lr_locktype nfs4_lr_u.lru_lockargs.lru_locktype 679 680 /* 681 * Recovery actions. Some actions can imply further recovery using a 682 * different recovery action (e.g., recovering the clientid leads to 683 * recovering open files and locks). 684 */ 685 686 typedef enum { 687 NR_UNUSED, 688 NR_CLIENTID, 689 NR_OPENFILES, 690 NR_FHEXPIRED, 691 NR_FAILOVER, 692 NR_WRONGSEC, 693 NR_EXPIRED, 694 NR_BAD_STATEID, 695 NR_BADHANDLE, 696 NR_BAD_SEQID, 697 NR_OLDSTATEID, 698 NR_GRACE, 699 NR_DELAY, 700 NR_LOST_LOCK, 701 NR_LOST_STATE_RQST, 702 NR_STALE 703 } nfs4_recov_t; 704 705 /* 706 * Administrative and debug message framework. 707 */ 708 709 #define NFS4_MSG_MAX 100 710 extern int nfs4_msg_max; 711 712 typedef enum { 713 RE_BAD_SEQID, 714 RE_BADHANDLE, 715 RE_CLIENTID, 716 RE_DEAD_FILE, 717 RE_END, 718 RE_FAIL_RELOCK, 719 RE_FAIL_REMAP_LEN, 720 RE_FAIL_REMAP_OP, 721 RE_FAILOVER, 722 RE_FILE_DIFF, 723 RE_LOST_STATE, 724 RE_OPENS_CHANGED, 725 RE_SIGLOST, 726 RE_SIGLOST_NO_DUMP, 727 RE_START, 728 RE_UNEXPECTED_ACTION, 729 RE_UNEXPECTED_ERRNO, 730 RE_UNEXPECTED_STATUS, 731 RE_WRONGSEC, 732 RE_LOST_STATE_BAD_OP 733 } nfs4_event_type_t; 734 735 typedef enum { 736 RFS_NO_INSPECT, 737 RFS_INSPECT 738 } nfs4_fact_status_t; 739 740 typedef enum { 741 RF_BADOWNER, 742 RF_ERR, 743 RF_RENEW_EXPIRED, 744 RF_SRV_NOT_RESPOND, 745 RF_SRV_OK, 746 RF_SRVS_NOT_RESPOND, 747 RF_SRVS_OK, 748 RF_DELMAP_CB_ERR, 749 RF_SENDQ_FULL 750 } nfs4_fact_type_t; 751 752 typedef enum { 753 NFS4_MS_DUMP, 754 NFS4_MS_NO_DUMP 755 } nfs4_msg_status_t; 756 757 typedef struct nfs4_rfact { 758 nfs4_fact_type_t rf_type; 759 nfs4_fact_status_t rf_status; 760 bool_t rf_reboot; 761 nfs4_recov_t rf_action; 762 nfs_opnum4 rf_op; 763 nfsstat4 rf_stat4; 764 timespec_t rf_time; 765 int rf_error; 766 struct rnode4 *rf_rp1; 767 char *rf_char1; 768 } nfs4_rfact_t; 769 770 typedef struct nfs4_revent { 771 nfs4_event_type_t re_type; 772 nfsstat4 re_stat4; 773 uint_t re_uint; 774 pid_t re_pid; 775 struct mntinfo4 *re_mi; 776 struct rnode4 *re_rp1; 777 struct rnode4 *re_rp2; 778 char *re_char1; 779 char *re_char2; 780 nfs4_tag_type_t re_tag1; 781 nfs4_tag_type_t re_tag2; 782 seqid4 re_seqid1; 783 seqid4 re_seqid2; 784 } nfs4_revent_t; 785 786 typedef enum { 787 RM_EVENT, 788 RM_FACT 789 } nfs4_msg_type_t; 790 791 typedef struct nfs4_debug_msg { 792 timespec_t msg_time; 793 nfs4_msg_type_t msg_type; 794 char *msg_srv; 795 char *msg_mntpt; 796 union { 797 nfs4_rfact_t msg_fact; 798 nfs4_revent_t msg_event; 799 } rmsg_u; 800 nfs4_msg_status_t msg_status; 801 list_node_t msg_node; 802 } nfs4_debug_msg_t; 803 804 /* 805 * NFS private data per mounted file system 806 * The mi_lock mutex protects the following fields: 807 * mi_flags 808 * mi_in_recovery 809 * mi_recovflags 810 * mi_recovthread 811 * mi_error 812 * mi_printed 813 * mi_down 814 * mi_stsize 815 * mi_curread 816 * mi_curwrite 817 * mi_timers 818 * mi_curr_serv 819 * mi_klmconfig 820 * mi_oo_list 821 * mi_foo_list 822 * mi_foo_num 823 * mi_foo_max 824 * mi_lost_state 825 * mi_bseqid_list 826 * mi_ephemeral 827 * mi_ephemeral_tree 828 * 829 * Normally the netconfig information for the mount comes from 830 * mi_curr_serv and mi_klmconfig is NULL. If NLM calls need to use a 831 * different transport, mi_klmconfig contains the necessary netconfig 832 * information. 833 * 834 * The mi_async_lock mutex protects the following fields: 835 * mi_async_reqs 836 * mi_async_req_count 837 * mi_async_tail 838 * mi_async_curr 839 * mi_async_clusters 840 * mi_async_init_clusters 841 * mi_threads 842 * mi_inactive_thread 843 * mi_manager_thread 844 * 845 * The nfs4_server_t::s_lock protects the following fields: 846 * mi_clientid 847 * mi_clientid_next 848 * mi_clientid_prev 849 * mi_open_files 850 * 851 * The mntinfo4_t::mi_recovlock protects the following fields: 852 * mi_srvsettime 853 * mi_srvset_cnt 854 * mi_srv 855 * 856 * Changing mi_srv from one nfs4_server_t to a different one requires 857 * holding the mi_recovlock as RW_WRITER. 858 * Exception: setting mi_srv the first time in mount/mountroot is done 859 * holding the mi_recovlock as RW_READER. 860 * 861 * Locking order: 862 * mi4_globals::mig_lock > mi_async_lock 863 * mi_async_lock > nfs4_server_t::s_lock > mi_lock 864 * mi_recovlock > mi_rename_lock > nfs_rtable4_lock 865 * nfs4_server_t::s_recovlock > mi_recovlock 866 * rnode4_t::r_rwlock > mi_rename_lock 867 * nfs_rtable4_lock > mi_lock 868 * nfs4_server_t::s_lock > mi_msg_list_lock 869 * mi_recovlock > nfs4_server_t::s_lock 870 * mi_recovlock > nfs4_server_lst_lock 871 * 872 * The 'mi_oo_list' represents the hash buckets that contain the 873 * nfs4_open_owenrs for this particular mntinfo4. 874 * 875 * The 'mi_foo_list' represents the freed nfs4_open_owners for this mntinfo4. 876 * 'mi_foo_num' is the current number of freed open owners on the list, 877 * 'mi_foo_max' is the maximum number of freed open owners that are allowable 878 * on the list. 879 * 880 * mi_rootfh and mi_srvparentfh are read-only once created, but that just 881 * refers to the pointer. The contents must be updated to keep in sync 882 * with mi_curr_serv. 883 * 884 * The mi_msg_list_lock protects against adding/deleting entries to the 885 * mi_msg_list, and also the updating/retrieving of mi_lease_period; 886 * 887 * 'mi_zone' is initialized at structure creation time, and never 888 * changes; it may be read without a lock. 889 * 890 * mi_zone_node is linkage into the mi4_globals.mig_list, and is 891 * protected by mi4_globals.mig_list_lock. 892 * 893 * If MI4_EPHEMERAL is set in mi_flags, then mi_ephemeral points to an 894 * ephemeral structure for this ephemeral mount point. It can not be 895 * NULL. Also, mi_ephemeral_tree points to the root of the ephemeral 896 * tree. 897 * 898 * If MI4_EPHEMERAL is not set in mi_flags, then mi_ephemeral has 899 * to be NULL. If mi_ephemeral_tree is non-NULL, then this node 900 * is the enclosing mntinfo4 for the ephemeral tree. 901 */ 902 struct zone; 903 struct nfs4_ephemeral; 904 struct nfs4_ephemeral_tree; 905 struct nfs4_server; 906 typedef struct mntinfo4 { 907 kmutex_t mi_lock; /* protects mntinfo4 fields */ 908 struct servinfo4 *mi_servers; /* server list */ 909 struct servinfo4 *mi_curr_serv; /* current server */ 910 struct nfs4_sharedfh *mi_rootfh; /* root filehandle */ 911 struct nfs4_sharedfh *mi_srvparentfh; /* root's parent on server */ 912 kcondvar_t mi_failover_cv; /* failover synchronization */ 913 struct vfs *mi_vfsp; /* back pointer to vfs */ 914 enum vtype mi_type; /* file type of the root vnode */ 915 uint_t mi_flags; /* see below */ 916 uint_t mi_recovflags; /* if recovery active; see below */ 917 kthread_t *mi_recovthread; /* active recov thread or NULL */ 918 uint_t mi_error; /* only set/valid when MI4_RECOV_FAIL */ 919 /* is set in mi_flags */ 920 int mi_tsize; /* transfer size (bytes) */ 921 /* really read size */ 922 int mi_stsize; /* server's max transfer size (bytes) */ 923 /* really write size */ 924 int mi_timeo; /* inital timeout in 10th sec */ 925 int mi_retrans; /* times to retry request */ 926 hrtime_t mi_acregmin; /* min time to hold cached file attr */ 927 hrtime_t mi_acregmax; /* max time to hold cached file attr */ 928 hrtime_t mi_acdirmin; /* min time to hold cached dir attr */ 929 hrtime_t mi_acdirmax; /* max time to hold cached dir attr */ 930 len_t mi_maxfilesize; /* for pathconf _PC_FILESIZEBITS */ 931 int mi_curread; /* current read size */ 932 int mi_curwrite; /* current write size */ 933 uint_t mi_count; /* ref count */ 934 /* 935 * async I/O management. There may be a pool of threads to handle 936 * async I/O requests, etc., plus there is always one thread that 937 * handles over-the-wire requests for VOP_INACTIVE. The async pool 938 * can also help out with VOP_INACTIVE. 939 */ 940 struct nfs4_async_reqs *mi_async_reqs[NFS4_ASYNC_TYPES]; 941 struct nfs4_async_reqs *mi_async_tail[NFS4_ASYNC_TYPES]; 942 struct nfs4_async_reqs **mi_async_curr; /* current async queue */ 943 uint_t mi_async_clusters[NFS4_ASYNC_TYPES]; 944 uint_t mi_async_init_clusters; 945 uint_t mi_async_req_count; /* # outstanding work requests */ 946 kcondvar_t mi_async_reqs_cv; /* signaled when there's work */ 947 ushort_t mi_threads; /* number of active async threads */ 948 ushort_t mi_max_threads; /* max number of async threads */ 949 kthread_t *mi_manager_thread; /* async manager thread id */ 950 kthread_t *mi_inactive_thread; /* inactive thread id */ 951 kcondvar_t mi_inact_req_cv; /* notify VOP_INACTIVE thread */ 952 kcondvar_t mi_async_work_cv; /* tell workers to work */ 953 kcondvar_t mi_async_cv; /* all pool threads exited */ 954 kmutex_t mi_async_lock; 955 /* 956 * Other stuff 957 */ 958 struct pathcnf *mi_pathconf; /* static pathconf kludge */ 959 rpcprog_t mi_prog; /* RPC program number */ 960 rpcvers_t mi_vers; /* RPC program version number */ 961 char **mi_rfsnames; /* mapping to proc names */ 962 kstat_named_t *mi_reqs; /* count of requests */ 963 clock_t mi_printftime; /* last error printf time */ 964 nfs_rwlock_t mi_recovlock; /* separate ops from recovery (v4) */ 965 time_t mi_grace_wait; /* non-zero represents time to wait */ 966 /* when we switched nfs4_server_t - only for observability purposes */ 967 time_t mi_srvsettime; 968 nfs_rwlock_t mi_rename_lock; /* atomic volfh rename */ 969 struct nfs4_fname *mi_fname; /* root fname */ 970 list_t mi_lost_state; /* resend list */ 971 list_t mi_bseqid_list; /* bad seqid list */ 972 /* 973 * Client Side Failover stats 974 */ 975 uint_t mi_noresponse; /* server not responding count */ 976 uint_t mi_failover; /* failover to new server count */ 977 uint_t mi_remap; /* remap to new server count */ 978 /* 979 * Kstat statistics 980 */ 981 struct kstat *mi_io_kstats; 982 struct kstat *mi_ro_kstats; 983 kstat_t *mi_recov_ksp; /* ptr to the recovery kstat */ 984 985 /* 986 * Volatile fh flags (nfsv4) 987 */ 988 uint32_t mi_fh_expire_type; 989 /* 990 * Lease Management 991 */ 992 struct mntinfo4 *mi_clientid_next; 993 struct mntinfo4 *mi_clientid_prev; 994 clientid4 mi_clientid; /* redundant info found in nfs4_server */ 995 int mi_open_files; /* count of open files */ 996 int mi_in_recovery; /* count of recovery instances */ 997 kcondvar_t mi_cv_in_recov; /* cv for recovery threads */ 998 /* 999 * Open owner stuff. 1000 */ 1001 struct nfs4_oo_hash_bucket mi_oo_list[NFS4_NUM_OO_BUCKETS]; 1002 list_t mi_foo_list; 1003 int mi_foo_num; 1004 int mi_foo_max; 1005 /* 1006 * Shared filehandle pool. 1007 */ 1008 nfs_rwlock_t mi_fh_lock; 1009 avl_tree_t mi_filehandles; 1010 1011 /* 1012 * Debug message queue. 1013 */ 1014 list_t mi_msg_list; 1015 int mi_msg_count; 1016 time_t mi_lease_period; 1017 /* 1018 * not guaranteed to be accurate. 1019 * only should be used by debug queue. 1020 */ 1021 kmutex_t mi_msg_list_lock; 1022 /* 1023 * Zones support. 1024 */ 1025 struct zone *mi_zone; /* Zone mounted in */ 1026 list_node_t mi_zone_node; /* linkage into per-zone mi list */ 1027 1028 /* 1029 * Links for unmounting ephemeral mounts. 1030 */ 1031 struct nfs4_ephemeral *mi_ephemeral; 1032 struct nfs4_ephemeral_tree *mi_ephemeral_tree; 1033 1034 uint_t mi_srvset_cnt; /* increment when changing the nfs4_server_t */ 1035 struct nfs4_server *mi_srv; /* backpointer to nfs4_server_t */ 1036 } mntinfo4_t; 1037 1038 /* 1039 * The values for mi_flags. 1040 * 1041 * MI4_HARD hard or soft mount 1042 * MI4_PRINTED responding message printed 1043 * MI4_INT allow INTR on hard mount 1044 * MI4_DOWN server is down 1045 * MI4_NOAC don't cache attributes 1046 * MI4_NOCTO no close-to-open consistency 1047 * MI4_LLOCK local locking only (no lockmgr) 1048 * MI4_GRPID System V group id inheritance 1049 * MI4_SHUTDOWN System is rebooting or shutting down 1050 * MI4_LINK server supports link 1051 * MI4_SYMLINK server supports symlink 1052 * MI4_EPHEMERAL_RECURSED an ephemeral mount being unmounted 1053 * due to a recursive call - no need 1054 * for additional recursion 1055 * MI4_ACL server supports NFSv4 ACLs 1056 * MI4_MIRRORMOUNT is a mirrormount 1057 * MI4_NOPRINT don't print messages 1058 * MI4_DIRECTIO do direct I/O 1059 * MI4_RECOV_ACTIV filesystem has recovery a thread 1060 * MI4_REMOVE_ON_LAST_CLOSE remove from server's list 1061 * MI4_RECOV_FAIL client recovery failed 1062 * MI4_PUBLIC public/url option used 1063 * MI4_MOUNTING mount in progress, don't failover 1064 * MI4_POSIX_LOCK if server is using POSIX locking 1065 * MI4_LOCK_DEBUG cmn_err'd posix lock err msg 1066 * MI4_DEAD zone has released it 1067 * MI4_INACTIVE_IDLE inactive thread idle 1068 * MI4_BADOWNER_DEBUG badowner error msg per mount 1069 * MI4_ASYNC_MGR_STOP tell async manager to die 1070 * MI4_TIMEDOUT saw a timeout during zone shutdown 1071 * MI4_EPHEMERAL is an ephemeral mount 1072 */ 1073 #define MI4_HARD 0x1 1074 #define MI4_PRINTED 0x2 1075 #define MI4_INT 0x4 1076 #define MI4_DOWN 0x8 1077 #define MI4_NOAC 0x10 1078 #define MI4_NOCTO 0x20 1079 #define MI4_LLOCK 0x80 1080 #define MI4_GRPID 0x100 1081 #define MI4_SHUTDOWN 0x200 1082 #define MI4_LINK 0x400 1083 #define MI4_SYMLINK 0x800 1084 #define MI4_EPHEMERAL_RECURSED 0x1000 1085 #define MI4_ACL 0x2000 1086 /* MI4_MIRRORMOUNT is also defined in nfsstat.c */ 1087 #define MI4_MIRRORMOUNT 0x4000 1088 /* 0x8000 is available */ 1089 /* 0x10000 is available */ 1090 #define MI4_NOPRINT 0x20000 1091 #define MI4_DIRECTIO 0x40000 1092 /* 0x80000 is available */ 1093 #define MI4_RECOV_ACTIV 0x100000 1094 #define MI4_REMOVE_ON_LAST_CLOSE 0x200000 1095 #define MI4_RECOV_FAIL 0x400000 1096 #define MI4_PUBLIC 0x800000 1097 #define MI4_MOUNTING 0x1000000 1098 #define MI4_POSIX_LOCK 0x2000000 1099 #define MI4_LOCK_DEBUG 0x4000000 1100 #define MI4_DEAD 0x8000000 1101 #define MI4_INACTIVE_IDLE 0x10000000 1102 #define MI4_BADOWNER_DEBUG 0x20000000 1103 #define MI4_ASYNC_MGR_STOP 0x40000000 1104 #define MI4_TIMEDOUT 0x80000000 1105 1106 /* 1107 * Note that when we add referrals, then MI4_EPHEMERAL 1108 * will be MI4_MIRRORMOUNT | MI4_REFERRAL. 1109 */ 1110 #define MI4_EPHEMERAL MI4_MIRRORMOUNT 1111 1112 #define INTR4(vp) (VTOMI4(vp)->mi_flags & MI4_INT) 1113 1114 #define FAILOVER_MOUNT4(mi) (mi->mi_servers->sv_next) 1115 1116 /* 1117 * Recovery flags. 1118 * 1119 * MI4R_NEED_CLIENTID is sort of redundant (it's the nfs4_server_t flag 1120 * that's important), but some flag is needed to indicate that recovery is 1121 * going on for the filesystem. 1122 */ 1123 #define MI4R_NEED_CLIENTID 0x1 1124 #define MI4R_REOPEN_FILES 0x2 1125 #define MI4R_NEED_SECINFO 0x4 1126 #define MI4R_NEED_NEW_SERVER 0x8 1127 #define MI4R_REMAP_FILES 0x10 1128 #define MI4R_SRV_REBOOT 0x20 /* server has rebooted */ 1129 #define MI4R_LOST_STATE 0x40 1130 #define MI4R_BAD_SEQID 0x80 1131 1132 #define MI4_HOLD(mi) { \ 1133 mi_hold(mi); \ 1134 } 1135 1136 #define MI4_RELE(mi) { \ 1137 mi_rele(mi); \ 1138 } 1139 1140 /* 1141 * vfs pointer to mount info 1142 */ 1143 #define VFTOMI4(vfsp) ((mntinfo4_t *)((vfsp)->vfs_data)) 1144 1145 /* 1146 * vnode pointer to mount info 1147 */ 1148 #define VTOMI4(vp) ((mntinfo4_t *)(((vp)->v_vfsp)->vfs_data)) 1149 1150 /* 1151 * Lease Management 1152 * 1153 * lease_valid is initially set to NFS4_LEASE_NOT_STARTED. This is when the 1154 * nfs4_server is first created. lease_valid is then set to 1155 * NFS4_LEASE_UNITIALIZED when the renew thread is started. The extra state of 1156 * NFS4_LEASE_NOT_STARTED is needed for client recovery (so we know if a thread 1157 * already exists when we do SETCLIENTID). lease_valid is then set to 1158 * NFS4_LEASE_VALID (if it is at NFS4_LEASE_UNITIALIZED) when a state creating 1159 * operation (OPEN) is done. lease_valid stays at NFS4_LEASE_VALID as long as 1160 * the lease is renewed. It is set to NFS4_LEASE_INVALID when the lease 1161 * expires. Client recovery is needed to set the lease back to 1162 * NFS4_LEASE_VALID from NFS4_LEASE_INVALID. 1163 * 1164 * The s_cred is the credential used to mount the first file system for this 1165 * server. It used as the credential for the renew thread's calls to the 1166 * server. 1167 * 1168 * The renew thread waits on the condition variable cv_thread_exit. If the cv 1169 * is signalled, then the thread knows it must check s_thread_exit to see if 1170 * it should exit. The cv is signaled when the last file system is unmounted 1171 * from a particular server. s_thread_exit is set to 0 upon thread startup, 1172 * and set to NFS4_THREAD_EXIT, when the last file system is unmounted thereby 1173 * telling the thread to exit. s_thread_exit is needed to avoid spurious 1174 * wakeups. 1175 * 1176 * state_ref_count is incremented every time a new file is opened and 1177 * decremented every time a file is closed otw. This keeps track of whether 1178 * the nfs4_server has state associated with it or not. 1179 * 1180 * s_refcnt is the reference count for storage management of the struct 1181 * itself. 1182 * 1183 * mntinfo4_list points to the doubly linked list of mntinfo4s that share 1184 * this nfs4_server (ie: <clientid, saddr> pair) in the current zone. This is 1185 * needed for a nfs4_server to get a mntinfo4 for use in rfs4call. 1186 * 1187 * s_recovlock is used to synchronize recovery operations. The thread 1188 * that is recovering the client must acquire it as a writer. If the 1189 * thread is using the clientid (including recovery operations on other 1190 * state), acquire it as a reader. 1191 * 1192 * The 's_otw_call_count' keeps track of the number of outstanding over the 1193 * wire requests for this structure. The struct will not go away as long 1194 * as this is non-zero (or s_refcnt is non-zero). 1195 * 1196 * The 's_cv_otw_count' is used in conjuntion with the 's_otw_call_count' 1197 * variable to let the renew thread when an outstanding otw request has 1198 * finished. 1199 * 1200 * 'zoneid' and 'zone_globals' are set at creation of this structure 1201 * and are read-only after that; no lock is required to read them. 1202 * 1203 * s_lock protects: everything except cv_thread_exit and s_recovlock. 1204 * 1205 * s_program is used as the index into the nfs4_callback_globals's 1206 * nfs4prog2server table. When a callback request comes in, we can 1207 * use that request's program number (minus NFS4_CALLBACK) as an index 1208 * into the nfs4prog2server. That entry will hold the nfs4_server_t ptr. 1209 * We can then access that nfs4_server_t and its 's_deleg_list' (its list of 1210 * delegated rnode4_ts). 1211 * 1212 * Lock order: 1213 * nfs4_server::s_lock > mntinfo4::mi_lock 1214 * nfs_rtable4_lock > s_lock 1215 * nfs4_server_lst_lock > s_lock 1216 * s_recovlock > s_lock 1217 */ 1218 struct nfs4_callback_globals; 1219 1220 typedef struct nfs4_server { 1221 struct nfs4_server *forw; 1222 struct nfs4_server *back; 1223 struct netbuf saddr; 1224 uint_t s_flags; /* see below */ 1225 uint_t s_refcnt; 1226 clientid4 clientid; /* what we get from server */ 1227 nfs_client_id4 clidtosend; /* what we send to server */ 1228 mntinfo4_t *mntinfo4_list; 1229 int lease_valid; 1230 time_t s_lease_time; 1231 time_t last_renewal_time; 1232 timespec_t propagation_delay; 1233 cred_t *s_cred; 1234 kcondvar_t cv_thread_exit; 1235 int s_thread_exit; 1236 int state_ref_count; 1237 int s_otw_call_count; 1238 kcondvar_t s_cv_otw_count; 1239 kcondvar_t s_clientid_pend; 1240 kmutex_t s_lock; 1241 list_t s_deleg_list; 1242 rpcprog_t s_program; 1243 nfs_rwlock_t s_recovlock; 1244 kcondvar_t wait_cb_null; /* used to wait for CB_NULL */ 1245 zoneid_t zoneid; /* zone using this nfs4_server_t */ 1246 struct nfs4_callback_globals *zone_globals; /* globals */ 1247 } nfs4_server_t; 1248 1249 /* nfs4_server flags */ 1250 #define N4S_CLIENTID_SET 1 /* server has our clientid */ 1251 #define N4S_CLIENTID_PEND 0x2 /* server doesn't have clientid */ 1252 #define N4S_CB_PINGED 0x4 /* server has sent us a CB_NULL */ 1253 #define N4S_CB_WAITER 0x8 /* is/has wait{ing/ed} for cb_null */ 1254 #define N4S_INSERTED 0x10 /* list has reference for server */ 1255 #define N4S_BADOWNER_DEBUG 0x20 /* bad owner err msg per client */ 1256 1257 #define N4S_CB_PAUSE_TIME 10000 /* Amount of time to pause (10ms) */ 1258 1259 struct lease_time_arg { 1260 time_t lease_time; 1261 }; 1262 1263 enum nfs4_delegreturn_policy { 1264 IMMEDIATE, 1265 FIRSTCLOSE, 1266 LASTCLOSE, 1267 INACTIVE 1268 }; 1269 1270 /* 1271 * Operation hints for the recovery framework (mostly). 1272 * 1273 * EXCEPTIONS: 1274 * OH_ACCESS, OH_GETACL, OH_GETATTR, OH_LOOKUP, OH_READDIR 1275 * These hints exist to allow user visit/readdir a R4SRVSTUB dir. 1276 * (dir represents the root of a server fs that has not yet been 1277 * mounted at client) 1278 */ 1279 typedef enum { 1280 OH_OTHER, 1281 OH_READ, 1282 OH_WRITE, 1283 OH_COMMIT, 1284 OH_VFH_RENAME, 1285 OH_MOUNT, 1286 OH_CLOSE, 1287 OH_LOCKU, 1288 OH_DELEGRETURN, 1289 OH_ACCESS, 1290 OH_GETACL, 1291 OH_GETATTR, 1292 OH_LOOKUP, 1293 OH_READDIR 1294 } nfs4_op_hint_t; 1295 1296 /* 1297 * This data structure is used to track ephemeral mounts for both 1298 * mirror mounts and referrals. 1299 * 1300 * Note that each nfs4_ephemeral can only have one other nfs4_ephemeral 1301 * pointing at it. So we don't need two backpointers to walk 1302 * back up the tree. 1303 * 1304 * An ephemeral tree is pointed to by an enclosing non-ephemeral 1305 * mntinfo4. The root is also pointed to by its ephemeral 1306 * mntinfo4. ne_child will get us back to it, while ne_prior 1307 * will get us back to the non-ephemeral mntinfo4. This is an 1308 * edge case we will need to be wary of when walking back up the 1309 * tree. 1310 * 1311 * The way we handle this edge case is to have ne_prior be NULL 1312 * for the root nfs4_ephemeral node. 1313 */ 1314 typedef struct nfs4_ephemeral { 1315 mntinfo4_t *ne_mount; /* who encloses us */ 1316 struct nfs4_ephemeral *ne_child; /* first child node */ 1317 struct nfs4_ephemeral *ne_peer; /* next sibling */ 1318 struct nfs4_ephemeral *ne_prior; /* who points at us */ 1319 time_t ne_ref_time; /* time last referenced */ 1320 uint_t ne_mount_to; /* timeout at */ 1321 int ne_state; /* used to traverse */ 1322 } nfs4_ephemeral_t; 1323 1324 /* 1325 * State for the node (set in ne_state): 1326 */ 1327 #define NFS4_EPHEMERAL_OK 0x0 1328 #define NFS4_EPHEMERAL_VISIT_CHILD 0x1 1329 #define NFS4_EPHEMERAL_VISIT_SIBLING 0x2 1330 #define NFS4_EPHEMERAL_PROCESS_ME 0x4 1331 #define NFS4_EPHEMERAL_CHILD_ERROR 0x8 1332 #define NFS4_EPHEMERAL_PEER_ERROR 0x10 1333 1334 /* 1335 * These are the locks used in processing ephemeral data: 1336 * 1337 * mi->mi_lock 1338 * 1339 * net->net_tree_lock 1340 * This lock is used to gate all tree operations. 1341 * If it is held, then no other process may 1342 * traverse the tree. This allows us to not 1343 * throw a hold on each vfs_t in the tree. 1344 * Can be held for a "long" time. 1345 * 1346 * net->net_cnt_lock 1347 * Used to protect refcnt and status. 1348 * Must be held for a really short time. 1349 * 1350 * nfs4_ephemeral_thread_lock 1351 * Is only held to create the harvester for the zone. 1352 * There is no ordering imposed on it. 1353 * Held for a really short time. 1354 * 1355 * Some further detail on the interactions: 1356 * 1357 * net_tree_lock controls access to net_root. Access needs to first be 1358 * attempted in a non-blocking check. 1359 * 1360 * net_cnt_lock controls access to net_refcnt and net_status. It must only be 1361 * held for very short periods of time, unless the refcnt is 0 and the status 1362 * is INVALID. 1363 * 1364 * Before a caller can grab net_tree_lock, it must first grab net_cnt_lock 1365 * to bump the net_refcnt. It then releases it and does the action specific 1366 * algorithm to get the net_tree_lock. Once it has that, then it is okay to 1367 * grab the net_cnt_lock and change the status. The status can only be 1368 * changed if the caller has the net_tree_lock held as well. 1369 * 1370 * Note that the initial grab of net_cnt_lock must occur whilst 1371 * mi_lock is being held. This prevents stale data in that if the 1372 * ephemeral tree is non-NULL, then the harvester can not remove 1373 * the tree from the mntinfo node until it grabs that lock. I.e., 1374 * we get the pointer to the tree and hold the lock atomically 1375 * with respect to being in mi_lock. 1376 * 1377 * When a caller is done with net_tree_lock, it can decrement the net_refcnt 1378 * either before it releases net_tree_lock or after. 1379 * 1380 * In either event, to decrement net_refcnt, it must hold net_cnt_lock. 1381 * 1382 * Note that the overall locking scheme for the nodes is to control access 1383 * via the tree. The current scheme could easily be extended such that 1384 * the enclosing root referenced a "forest" of trees. The underlying trees 1385 * would be autonomous with respect to locks. 1386 * 1387 * Note that net_next is controlled by external locks 1388 * particular to the data structure that the tree is being added to. 1389 */ 1390 typedef struct nfs4_ephemeral_tree { 1391 mntinfo4_t *net_mount; 1392 nfs4_ephemeral_t *net_root; 1393 struct nfs4_ephemeral_tree *net_next; 1394 kmutex_t net_tree_lock; 1395 kmutex_t net_cnt_lock; 1396 uint_t net_status; 1397 uint_t net_refcnt; 1398 } nfs4_ephemeral_tree_t; 1399 1400 /* 1401 * State for the tree (set in net_status): 1402 */ 1403 #define NFS4_EPHEMERAL_TREE_OK 0x0 1404 #define NFS4_EPHEMERAL_TREE_BUILDING 0x1 1405 #define NFS4_EPHEMERAL_TREE_DEROOTING 0x2 1406 #define NFS4_EPHEMERAL_TREE_INVALID 0x4 1407 #define NFS4_EPHEMERAL_TREE_MOUNTING 0x8 1408 #define NFS4_EPHEMERAL_TREE_UMOUNTING 0x10 1409 #define NFS4_EPHEMERAL_TREE_LOCKED 0x20 1410 1411 #define NFS4_EPHEMERAL_TREE_PROCESSING (NFS4_EPHEMERAL_TREE_DEROOTING | \ 1412 NFS4_EPHEMERAL_TREE_INVALID | NFS4_EPHEMERAL_TREE_UMOUNTING | \ 1413 NFS4_EPHEMERAL_TREE_LOCKED) 1414 1415 /* 1416 * This macro evaluates to non-zero if the given op releases state at the 1417 * server. 1418 */ 1419 #define OH_IS_STATE_RELE(op) ((op) == OH_CLOSE || (op) == OH_LOCKU || \ 1420 (op) == OH_DELEGRETURN) 1421 1422 #ifdef _KERNEL 1423 1424 extern void nfs4_async_manager(struct vfs *); 1425 extern void nfs4_async_manager_stop(struct vfs *); 1426 extern void nfs4_async_stop(struct vfs *); 1427 extern int nfs4_async_stop_sig(struct vfs *); 1428 extern int nfs4_async_readahead(vnode_t *, u_offset_t, caddr_t, 1429 struct seg *, cred_t *, 1430 void (*)(vnode_t *, u_offset_t, 1431 caddr_t, struct seg *, cred_t *)); 1432 extern int nfs4_async_putapage(vnode_t *, page_t *, u_offset_t, size_t, 1433 int, cred_t *, int (*)(vnode_t *, page_t *, 1434 u_offset_t, size_t, int, cred_t *)); 1435 extern int nfs4_async_pageio(vnode_t *, page_t *, u_offset_t, size_t, 1436 int, cred_t *, int (*)(vnode_t *, page_t *, 1437 u_offset_t, size_t, int, cred_t *)); 1438 extern void nfs4_async_commit(vnode_t *, page_t *, offset3, count3, 1439 cred_t *, void (*)(vnode_t *, page_t *, 1440 offset3, count3, cred_t *)); 1441 extern void nfs4_async_inactive(vnode_t *, cred_t *); 1442 extern void nfs4_inactive_thread(mntinfo4_t *mi); 1443 extern void nfs4_inactive_otw(vnode_t *, cred_t *); 1444 extern int nfs4_putpages(vnode_t *, u_offset_t, size_t, int, cred_t *); 1445 1446 extern int nfs4_setopts(vnode_t *, model_t, struct nfs_args *); 1447 extern void nfs4_mnt_kstat_init(struct vfs *); 1448 1449 extern void rfs4call(struct mntinfo4 *, struct COMPOUND4args_clnt *, 1450 struct COMPOUND4res_clnt *, cred_t *, int *, int, 1451 nfs4_error_t *); 1452 extern void nfs4_acl_fill_cache(struct rnode4 *, vsecattr_t *); 1453 extern int nfs4_attr_otw(vnode_t *, nfs4_tag_type_t, 1454 nfs4_ga_res_t *, bitmap4, cred_t *); 1455 1456 extern void nfs4_attrcache_noinval(vnode_t *, nfs4_ga_res_t *, hrtime_t); 1457 extern void nfs4_attr_cache(vnode_t *, nfs4_ga_res_t *, 1458 hrtime_t, cred_t *, int, 1459 change_info4 *); 1460 extern void nfs4_purge_rddir_cache(vnode_t *); 1461 extern void nfs4_invalidate_pages(vnode_t *, u_offset_t, cred_t *); 1462 extern void nfs4_purge_caches(vnode_t *, int, cred_t *, int); 1463 extern void nfs4_purge_stale_fh(int, vnode_t *, cred_t *); 1464 extern void nfs4_flush_pages(vnode_t *vp, cred_t *cr); 1465 1466 extern void nfs4rename_update(vnode_t *, vnode_t *, nfs_fh4 *, char *); 1467 extern void nfs4_update_paths(vnode_t *, char *, vnode_t *, char *, 1468 vnode_t *); 1469 1470 extern void nfs4args_lookup_free(nfs_argop4 *, int); 1471 extern void nfs4args_copen_free(OPEN4cargs *); 1472 1473 extern void nfs4_printfhandle(nfs4_fhandle_t *); 1474 1475 extern void nfs_free_mi4(mntinfo4_t *); 1476 extern void sv4_free(servinfo4_t *); 1477 extern void nfs4_mi_zonelist_add(mntinfo4_t *); 1478 extern int nfs4_mi_zonelist_remove(mntinfo4_t *); 1479 extern int nfs4_secinfo_recov(mntinfo4_t *, vnode_t *, vnode_t *); 1480 extern void nfs4_secinfo_init(void); 1481 extern void nfs4_secinfo_fini(void); 1482 extern int nfs4_secinfo_path(mntinfo4_t *, cred_t *, int); 1483 extern int nfs4_secinfo_vnode_otw(vnode_t *, char *, cred_t *); 1484 extern void secinfo_free(sv_secinfo_t *); 1485 extern void save_mnt_secinfo(servinfo4_t *); 1486 extern void check_mnt_secinfo(servinfo4_t *, vnode_t *); 1487 extern int vattr_to_fattr4(vattr_t *, vsecattr_t *, fattr4 *, int, 1488 enum nfs_opnum4, bitmap4 supp_mask); 1489 extern int nfs4_putapage(vnode_t *, page_t *, u_offset_t *, size_t *, 1490 int, cred_t *); 1491 extern void nfs4_write_error(vnode_t *, int, cred_t *); 1492 extern void nfs4_lockcompletion(vnode_t *, int); 1493 extern bool_t nfs4_map_lost_lock_conflict(vnode_t *); 1494 extern int vtodv(vnode_t *, vnode_t **, cred_t *, bool_t); 1495 extern void nfs4open_confirm(vnode_t *, seqid4*, stateid4 *, cred_t *, 1496 bool_t, bool_t *, nfs4_open_owner_t *, bool_t, 1497 nfs4_error_t *, int *); 1498 extern void nfs4_error_zinit(nfs4_error_t *); 1499 extern void nfs4_error_init(nfs4_error_t *, int); 1500 extern void nfs4_free_args(struct nfs_args *); 1501 1502 extern void mi_hold(mntinfo4_t *); 1503 extern void mi_rele(mntinfo4_t *); 1504 1505 extern sec_data_t *copy_sec_data(sec_data_t *); 1506 extern gss_clntdata_t *copy_sec_data_gss(gss_clntdata_t *); 1507 1508 #ifdef DEBUG 1509 extern int nfs4_consistent_type(vnode_t *); 1510 #endif 1511 1512 extern void nfs4_init_dot_entries(void); 1513 extern void nfs4_destroy_dot_entries(void); 1514 extern struct nfs4_callback_globals *nfs4_get_callback_globals(void); 1515 1516 extern struct nfs4_server nfs4_server_lst; 1517 1518 extern clock_t nfs_write_error_interval; 1519 1520 #endif /* _KERNEL */ 1521 1522 /* 1523 * Flags for nfs4getfh_otw. 1524 */ 1525 1526 #define NFS4_GETFH_PUBLIC 0x01 1527 #define NFS4_GETFH_NEEDSOP 0x02 1528 1529 /* 1530 * Found through rnodes. 1531 * 1532 * The os_open_ref_count keeps track the number of open file descriptor 1533 * refernces on this data structure. It will be bumped for any successful 1534 * OTW OPEN call and any OPEN call that determines the OTW call is not 1535 * necessary and the open stream hasn't just been created (see 1536 * nfs4_is_otw_open_necessary). 1537 * 1538 * os_mapcnt is a count of the number of mmapped pages for a particular 1539 * open stream; this in conjunction w/ os_open_ref_count is used to 1540 * determine when to do a close to the server. This is necessary because 1541 * of the semantics of doing open, mmap, close; the OTW close must be wait 1542 * until all open and mmap references have vanished. 1543 * 1544 * 'os_valid' tells us whether this structure is about to be freed or not, 1545 * if it is then don't return it in find_open_stream(). 1546 * 1547 * 'os_final_close' is set when a CLOSE OTW was attempted. This is needed 1548 * so we can properly count the os_open_ref_count in cases where we VOP_CLOSE 1549 * without a VOP_OPEN, and have nfs4_inactive() drive the OTW CLOSE. It 1550 * also helps differentiate the VOP_OPEN/VN_RELE case from the VOP_CLOSE 1551 * that tried to close OTW but failed, and left the state cleanup to 1552 * nfs4_inactive/CLOSE_FORCE. 1553 * 1554 * 'os_force_close' is used to let us know if an intervening thread came 1555 * and reopened the open stream after we decided to issue a CLOSE_FORCE, 1556 * but before we could actually process the CLOSE_FORCE. 1557 * 1558 * 'os_pending_close' is set when an over-the-wire CLOSE is deferred to the 1559 * lost state queue. 1560 * 1561 * 'open_stateid' is set the last open stateid returned by the server unless 1562 * 'os_delegation' is 1, in which case 'open_stateid' refers to the 1563 * delegation stateid returned by the server. This is used in cases where the 1564 * client tries to OPEN a file but already has a suitable delegation, so we 1565 * just stick the delegation stateid in the open stream. 1566 * 1567 * os_dc_openacc are open access bits which have been granted to the 1568 * open stream by virtue of a delegation, but which have not been seen 1569 * by the server. This applies even if the open stream does not have 1570 * os_delegation set. These bits are used when setting file locks to 1571 * determine whether an open with CLAIM_DELEGATE_CUR needs to be done 1572 * before the lock request can be sent to the server. See 1573 * nfs4frlock_check_deleg(). 1574 * 1575 * 'os_mmap_read/write' keep track of the read and write access our memory 1576 * maps require. We need to keep track of this so we can provide the proper 1577 * access bits in the open/mmap/close/reboot/reopen case. 1578 * 1579 * 'os_failed_reopen' tells us that we failed to successfully reopen this 1580 * open stream; therefore, we should not use this open stateid as it is 1581 * not valid anymore. This flag is also used to indicate an unsuccessful 1582 * attempt to reopen a delegation open stream with CLAIM_DELEGATE_CUR. 1583 * 1584 * If 'os_orig_oo_name' is different than os_open_owner's oo_name 1585 * then this tells us that this open stream's open owner used a 1586 * bad seqid (that is, got NFS4ERR_BAD_SEQID). If different, this open 1587 * stream will no longer be used for future OTW state releasing calls. 1588 * 1589 * Lock ordering: 1590 * rnode4_t::r_os_lock > os_sync_lock 1591 * os_sync_lock > rnode4_t::r_statelock 1592 * os_sync_lock > rnode4_t::r_statev4_lock 1593 * os_sync_lock > mntinfo4_t::mi_lock (via hold over rfs4call) 1594 * 1595 * The 'os_sync_lock' protects: 1596 * open_stateid 1597 * os_dc_openacc 1598 * os_delegation 1599 * os_failed_reopen 1600 * os_final_close 1601 * os_force_close 1602 * os_mapcnt 1603 * os_mmap_read 1604 * os_mmap_write 1605 * os_open_ref_count 1606 * os_pending_close 1607 * os_share_acc_read 1608 * os_share_acc_write 1609 * os_share_deny_none 1610 * os_share_deny_read 1611 * os_share_deny_write 1612 * os_ref_count 1613 * os_valid 1614 * 1615 * The rnode4_t::r_os_lock protects: 1616 * os_node 1617 * 1618 * These fields are set at creation time and 1619 * read only after that: 1620 * os_open_owner 1621 * os_orig_oo_name 1622 */ 1623 typedef struct nfs4_open_stream { 1624 uint64_t os_share_acc_read; 1625 uint64_t os_share_acc_write; 1626 uint64_t os_mmap_read; 1627 uint64_t os_mmap_write; 1628 uint32_t os_share_deny_none; 1629 uint32_t os_share_deny_read; 1630 uint32_t os_share_deny_write; 1631 stateid4 open_stateid; 1632 int os_dc_openacc; 1633 int os_ref_count; 1634 unsigned os_valid:1; 1635 unsigned os_delegation:1; 1636 unsigned os_final_close:1; 1637 unsigned os_pending_close:1; 1638 unsigned os_failed_reopen:1; 1639 unsigned os_force_close:1; 1640 int os_open_ref_count; 1641 long os_mapcnt; 1642 list_node_t os_node; 1643 struct nfs4_open_owner *os_open_owner; 1644 uint64_t os_orig_oo_name; 1645 kmutex_t os_sync_lock; 1646 } nfs4_open_stream_t; 1647 1648 /* 1649 * This structure describes the format of the lock_owner_name 1650 * field of the lock owner. 1651 */ 1652 1653 typedef struct nfs4_lo_name { 1654 uint64_t ln_seq_num; 1655 pid_t ln_pid; 1656 } nfs4_lo_name_t; 1657 1658 /* 1659 * Flags for lo_flags. 1660 */ 1661 #define NFS4_LOCK_SEQID_INUSE 0x1 1662 #define NFS4_BAD_SEQID_LOCK 0x2 1663 1664 /* 1665 * The lo_prev_rnode and lo_next_rnode are for a circular list that hangs 1666 * off the rnode. If the links are NULL it means this object is not on the 1667 * list. 1668 * 1669 * 'lo_pending_rqsts' is non-zero if we ever tried to send a request and 1670 * didn't get a response back. This is used to figure out if we have 1671 * possible remote v4 locks, so that we can clean up at process exit. In 1672 * theory, the client should be able to figure out if the server received 1673 * the request (based on what seqid works), so maybe we can get rid of this 1674 * flag someday. 1675 * 1676 * 'lo_ref_count' tells us how many processes/threads are using this data 1677 * structure. The rnode's list accounts for one reference. 1678 * 1679 * 'lo_just_created' is set to NFS4_JUST_CREATED when we first create the 1680 * data structure. It is then set to NFS4_PERM_CREATED when a lock request 1681 * is successful using this lock owner structure. We need to keep 'temporary' 1682 * lock owners around so we can properly keep the lock seqid synchronization 1683 * when multiple processes/threads are trying to create the lock owner for the 1684 * first time (especially with the DENIED error case). Once 1685 * 'lo_just_created' is set to NFS4_PERM_CREATED, it doesn't change. 1686 * 1687 * 'lo_valid' tells us whether this structure is about to be freed or not, 1688 * if it is then don't return it from find_lock_owner(). 1689 * 1690 * Retrieving and setting of 'lock_seqid' is protected by the 1691 * NFS4_LOCK_SEQID_INUSE flag. Waiters for NFS4_LOCK_SEQID_INUSE should 1692 * use 'lo_cv_seqid_sync'. 1693 * 1694 * The setting of 'lock_stateid' is protected by the 1695 * NFS4_LOCK_SEQID_INUSE flag and 'lo_lock'. The retrieving of the 1696 * 'lock_stateid' is protected by 'lo_lock', with the additional 1697 * requirement that the calling function can handle NFS4ERR_OLD_STATEID and 1698 * NFS4ERR_BAD_STATEID as appropiate. 1699 * 1700 * The setting of NFS4_BAD_SEQID_LOCK to lo_flags tells us whether this lock 1701 * owner used a bad seqid (that is, got NFS4ERR_BAD_SEQID). With this set, 1702 * this lock owner will no longer be used for future OTW calls. Once set, 1703 * it is never unset. 1704 * 1705 * Lock ordering: 1706 * rnode4_t::r_statev4_lock > lo_lock 1707 */ 1708 typedef struct nfs4_lock_owner { 1709 struct nfs4_lock_owner *lo_next_rnode; 1710 struct nfs4_lock_owner *lo_prev_rnode; 1711 int lo_pid; 1712 stateid4 lock_stateid; 1713 seqid4 lock_seqid; 1714 /* 1715 * Fix this to always be 12 bytes 1716 */ 1717 nfs4_lo_name_t lock_owner_name; 1718 int lo_ref_count; 1719 int lo_valid; 1720 int lo_pending_rqsts; 1721 int lo_just_created; 1722 int lo_flags; 1723 kcondvar_t lo_cv_seqid_sync; 1724 kmutex_t lo_lock; 1725 kthread_t *lo_seqid_holder; /* debugging aid */ 1726 } nfs4_lock_owner_t; 1727 1728 /* for nfs4_lock_owner_t lookups */ 1729 typedef enum {LOWN_ANY, LOWN_VALID_STATEID} lown_which_t; 1730 1731 /* Number of times to retry a call that fails with state independent error */ 1732 #define NFS4_NUM_RECOV_RETRIES 3 1733 1734 typedef enum { 1735 NO_SID, 1736 DEL_SID, 1737 LOCK_SID, 1738 OPEN_SID, 1739 SPEC_SID 1740 } nfs4_stateid_type_t; 1741 1742 typedef struct nfs4_stateid_types { 1743 stateid4 d_sid; 1744 stateid4 l_sid; 1745 stateid4 o_sid; 1746 nfs4_stateid_type_t cur_sid_type; 1747 } nfs4_stateid_types_t; 1748 1749 /* 1750 * Per-zone data for dealing with callbacks. Included here solely for the 1751 * benefit of MDB. 1752 */ 1753 struct nfs4_callback_stats { 1754 kstat_named_t delegations; 1755 kstat_named_t cb_getattr; 1756 kstat_named_t cb_recall; 1757 kstat_named_t cb_null; 1758 kstat_named_t cb_dispatch; 1759 kstat_named_t delegaccept_r; 1760 kstat_named_t delegaccept_rw; 1761 kstat_named_t delegreturn; 1762 kstat_named_t callbacks; 1763 kstat_named_t claim_cur; 1764 kstat_named_t claim_cur_ok; 1765 kstat_named_t recall_trunc; 1766 kstat_named_t recall_failed; 1767 kstat_named_t return_limit_write; 1768 kstat_named_t return_limit_addmap; 1769 kstat_named_t deleg_recover; 1770 kstat_named_t cb_illegal; 1771 }; 1772 1773 struct nfs4_callback_globals { 1774 kmutex_t nfs4_cb_lock; 1775 kmutex_t nfs4_dlist_lock; 1776 int nfs4_program_hint; 1777 /* this table maps the program number to the nfs4_server structure */ 1778 struct nfs4_server **nfs4prog2server; 1779 list_t nfs4_dlist; 1780 list_t nfs4_cb_ports; 1781 struct nfs4_callback_stats nfs4_callback_stats; 1782 #ifdef DEBUG 1783 int nfs4_dlistadd_c; 1784 int nfs4_dlistclean_c; 1785 #endif 1786 }; 1787 1788 typedef enum { 1789 CLOSE_NORM, 1790 CLOSE_DELMAP, 1791 CLOSE_FORCE, 1792 CLOSE_RESEND, 1793 CLOSE_AFTER_RESEND 1794 } nfs4_close_type_t; 1795 1796 /* 1797 * Structure to hold the bad seqid information that is passed 1798 * to the recovery framework. 1799 */ 1800 typedef struct nfs4_bseqid_entry { 1801 nfs4_open_owner_t *bs_oop; 1802 nfs4_lock_owner_t *bs_lop; 1803 vnode_t *bs_vp; 1804 pid_t bs_pid; 1805 nfs4_tag_type_t bs_tag; 1806 seqid4 bs_seqid; 1807 list_node_t bs_node; 1808 } nfs4_bseqid_entry_t; 1809 1810 #ifdef _KERNEL 1811 1812 extern void nfs4close_one(vnode_t *, nfs4_open_stream_t *, cred_t *, int, 1813 nfs4_lost_rqst_t *, nfs4_error_t *, nfs4_close_type_t, 1814 size_t, uint_t, uint_t); 1815 extern void nfs4close_notw(vnode_t *, nfs4_open_stream_t *, int *); 1816 extern void nfs4_set_lock_stateid(nfs4_lock_owner_t *, stateid4); 1817 extern void open_owner_hold(nfs4_open_owner_t *); 1818 extern void open_owner_rele(nfs4_open_owner_t *); 1819 extern nfs4_open_stream_t *find_or_create_open_stream(nfs4_open_owner_t *, 1820 struct rnode4 *, int *); 1821 extern nfs4_open_stream_t *find_open_stream(nfs4_open_owner_t *, 1822 struct rnode4 *); 1823 extern nfs4_open_stream_t *create_open_stream(nfs4_open_owner_t *oop, 1824 struct rnode4 *rp); 1825 extern void open_stream_hold(nfs4_open_stream_t *); 1826 extern void open_stream_rele(nfs4_open_stream_t *, struct rnode4 *); 1827 extern int nfs4close_all(vnode_t *, cred_t *); 1828 extern void lock_owner_hold(nfs4_lock_owner_t *); 1829 extern void lock_owner_rele(nfs4_lock_owner_t *); 1830 extern nfs4_lock_owner_t *create_lock_owner(struct rnode4 *, pid_t); 1831 extern nfs4_lock_owner_t *find_lock_owner(struct rnode4 *, pid_t, lown_which_t); 1832 extern void nfs4_rnode_remove_lock_owner(struct rnode4 *, 1833 nfs4_lock_owner_t *); 1834 extern void nfs4_flush_lock_owners(struct rnode4 *); 1835 extern void nfs4_setlockowner_args(lock_owner4 *, struct rnode4 *, pid_t); 1836 extern void nfs4_set_open_seqid(seqid4, nfs4_open_owner_t *, 1837 nfs4_tag_type_t); 1838 extern void nfs4_set_lock_seqid(seqid4, nfs4_lock_owner_t *); 1839 extern void nfs4_get_and_set_next_open_seqid(nfs4_open_owner_t *, 1840 nfs4_tag_type_t); 1841 extern void nfs4_end_open_seqid_sync(nfs4_open_owner_t *); 1842 extern int nfs4_start_open_seqid_sync(nfs4_open_owner_t *, mntinfo4_t *); 1843 extern void nfs4_end_lock_seqid_sync(nfs4_lock_owner_t *); 1844 extern int nfs4_start_lock_seqid_sync(nfs4_lock_owner_t *, mntinfo4_t *); 1845 extern void nfs4_setup_lock_args(nfs4_lock_owner_t *, nfs4_open_owner_t *, 1846 nfs4_open_stream_t *, clientid4, locker4 *); 1847 extern void nfs4_destroy_open_owner(nfs4_open_owner_t *); 1848 1849 extern void nfs4_renew_lease_thread(nfs4_server_t *); 1850 extern nfs4_server_t *find_nfs4_server(mntinfo4_t *); 1851 extern nfs4_server_t *find_nfs4_server_all(mntinfo4_t *, int all); 1852 extern nfs4_server_t *new_nfs4_server(servinfo4_t *, cred_t *); 1853 extern void nfs4_mark_srv_dead(nfs4_server_t *); 1854 extern nfs4_server_t *servinfo4_to_nfs4_server(servinfo4_t *); 1855 extern void nfs4_inc_state_ref_count(mntinfo4_t *); 1856 extern void nfs4_inc_state_ref_count_nolock(nfs4_server_t *, 1857 mntinfo4_t *); 1858 extern void nfs4_dec_state_ref_count(mntinfo4_t *); 1859 extern void nfs4_dec_state_ref_count_nolock(nfs4_server_t *, 1860 mntinfo4_t *); 1861 extern clientid4 mi2clientid(mntinfo4_t *); 1862 extern int nfs4_server_in_recovery(nfs4_server_t *); 1863 extern bool_t nfs4_server_vlock(nfs4_server_t *, int); 1864 extern nfs4_open_owner_t *create_open_owner(cred_t *, mntinfo4_t *); 1865 extern uint64_t nfs4_get_new_oo_name(void); 1866 extern nfs4_open_owner_t *find_open_owner(cred_t *, int, mntinfo4_t *); 1867 extern nfs4_open_owner_t *find_open_owner_nolock(cred_t *, int, mntinfo4_t *); 1868 extern void nfs4frlock(nfs4_lock_call_type_t, vnode_t *, int, flock64_t *, 1869 int, u_offset_t, cred_t *, nfs4_error_t *, 1870 nfs4_lost_rqst_t *, int *); 1871 extern void nfs4open_dg_save_lost_rqst(int, nfs4_lost_rqst_t *, 1872 nfs4_open_owner_t *, nfs4_open_stream_t *, cred_t *, 1873 vnode_t *, int, int); 1874 extern void nfs4_open_downgrade(int, int, nfs4_open_owner_t *, 1875 nfs4_open_stream_t *, vnode_t *, cred_t *, 1876 nfs4_lost_rqst_t *, nfs4_error_t *, cred_t **, seqid4 *); 1877 extern seqid4 nfs4_get_open_seqid(nfs4_open_owner_t *); 1878 extern cred_t *nfs4_get_otw_cred(cred_t *, mntinfo4_t *, nfs4_open_owner_t *); 1879 extern void nfs4_init_stateid_types(nfs4_stateid_types_t *); 1880 extern void nfs4_save_stateid(stateid4 *, nfs4_stateid_types_t *); 1881 1882 extern kmutex_t nfs4_server_lst_lock; 1883 1884 extern void nfs4callback_destroy(nfs4_server_t *); 1885 extern void nfs4_callback_init(void); 1886 extern void nfs4_callback_fini(void); 1887 extern void nfs4_cb_args(nfs4_server_t *, struct knetconfig *, 1888 SETCLIENTID4args *); 1889 extern void nfs4delegreturn_async(struct rnode4 *, int, bool_t); 1890 1891 extern enum nfs4_delegreturn_policy nfs4_delegreturn_policy; 1892 1893 extern void nfs4_add_mi_to_server(nfs4_server_t *, mntinfo4_t *); 1894 extern void nfs4_remove_mi_from_server(mntinfo4_t *, nfs4_server_t *); 1895 extern nfs4_server_t *nfs4_move_mi(mntinfo4_t *, servinfo4_t *, servinfo4_t *); 1896 extern bool_t nfs4_fs_active(nfs4_server_t *); 1897 extern void nfs4_server_rele(nfs4_server_t *); 1898 extern bool_t inlease(nfs4_server_t *); 1899 extern bool_t nfs4_has_pages(vnode_t *); 1900 extern void nfs4_log_badowner(mntinfo4_t *, nfs_opnum4); 1901 1902 #endif /* _KERNEL */ 1903 1904 /* 1905 * Client State Recovery 1906 */ 1907 1908 /* 1909 * The following defines are used for rs_flags in 1910 * a nfs4_recov_state_t structure. 1911 * 1912 * NFS4_RS_RENAME_HELD Indicates that the mi_rename_lock was held. 1913 * NFS4_RS_GRACE_MSG Set once we have uprintf'ed a grace message. 1914 * NFS4_RS_DELAY_MSG Set once we have uprintf'ed a delay message. 1915 * NFS4_RS_RECALL_HELD1 r_deleg_recall_lock for vp1 was held. 1916 * NFS4_RS_RECALL_HELD2 r_deleg_recall_lock for vp2 was held. 1917 */ 1918 #define NFS4_RS_RENAME_HELD 0x000000001 1919 #define NFS4_RS_GRACE_MSG 0x000000002 1920 #define NFS4_RS_DELAY_MSG 0x000000004 1921 #define NFS4_RS_RECALL_HELD1 0x000000008 1922 #define NFS4_RS_RECALL_HELD2 0x000000010 1923 1924 /* 1925 * Information that is retrieved from nfs4_start_op() and that is 1926 * passed into nfs4_end_op(). 1927 * 1928 * rs_sp is a reference to the nfs4_server that was found, or NULL. 1929 * 1930 * rs_num_retry_despite_err is the number times client retried an 1931 * OTW op despite a recovery error. It is only incremented for hints 1932 * exempt to normal R4RECOVERR processing 1933 * (OH_CLOSE/OH_LOCKU/OH_DELEGRETURN). (XXX this special-case code 1934 * needs review for possible removal.) 1935 * It is initialized wherever nfs4_recov_state_t is declared -- usually 1936 * very near initialization of rs_flags. 1937 */ 1938 typedef struct { 1939 nfs4_server_t *rs_sp; 1940 int rs_flags; 1941 int rs_num_retry_despite_err; 1942 } nfs4_recov_state_t; 1943 1944 /* 1945 * Flags for nfs4_check_remap, nfs4_remap_file and nfs4_remap_root. 1946 */ 1947 1948 #define NFS4_REMAP_CKATTRS 1 1949 #define NFS4_REMAP_NEEDSOP 2 1950 1951 #ifdef _KERNEL 1952 1953 extern int nfs4_is_otw_open_necessary(nfs4_open_owner_t *, int, 1954 vnode_t *, int, int *, int, nfs4_recov_state_t *); 1955 extern void nfs4setclientid(struct mntinfo4 *, struct cred *, bool_t, 1956 nfs4_error_t *); 1957 extern void nfs4_reopen(vnode_t *, nfs4_open_stream_t *, nfs4_error_t *, 1958 open_claim_type4, bool_t, bool_t); 1959 extern void nfs4_remap_root(struct mntinfo4 *, nfs4_error_t *, int); 1960 extern void nfs4_check_remap(mntinfo4_t *mi, vnode_t *vp, int, 1961 nfs4_error_t *); 1962 extern void nfs4_remap_file(mntinfo4_t *mi, vnode_t *vp, int, 1963 nfs4_error_t *); 1964 extern int nfs4_make_dotdot(struct nfs4_sharedfh *, hrtime_t, 1965 vnode_t *, cred_t *, vnode_t **, int); 1966 extern void nfs4_fail_recov(vnode_t *, char *, int, nfsstat4); 1967 1968 extern int nfs4_needs_recovery(nfs4_error_t *, bool_t, vfs_t *); 1969 extern int nfs4_recov_marks_dead(nfsstat4); 1970 extern bool_t nfs4_start_recovery(nfs4_error_t *, struct mntinfo4 *, 1971 vnode_t *, vnode_t *, stateid4 *, 1972 nfs4_lost_rqst_t *, nfs_opnum4, nfs4_bseqid_entry_t *); 1973 extern int nfs4_start_op(struct mntinfo4 *, vnode_t *, vnode_t *, 1974 nfs4_recov_state_t *); 1975 extern void nfs4_end_op(struct mntinfo4 *, vnode_t *, vnode_t *, 1976 nfs4_recov_state_t *, bool_t); 1977 extern int nfs4_start_fop(struct mntinfo4 *, vnode_t *, vnode_t *, 1978 nfs4_op_hint_t, nfs4_recov_state_t *, bool_t *); 1979 extern void nfs4_end_fop(struct mntinfo4 *, vnode_t *, vnode_t *, 1980 nfs4_op_hint_t, nfs4_recov_state_t *, bool_t); 1981 extern char *nfs4_recov_action_to_str(nfs4_recov_t); 1982 1983 /* 1984 * In sequence, code desiring to unmount an ephemeral tree must 1985 * call nfs4_ephemeral_umount, nfs4_ephemeral_umount_activate, 1986 * and nfs4_ephemeral_umount_unlock. The _unlock must also be 1987 * called on all error paths that occur before it would naturally 1988 * be invoked. 1989 * 1990 * The caller must also provde a pointer to a boolean to keep track 1991 * of whether or not the code in _unlock is to be ran. 1992 */ 1993 extern void nfs4_ephemeral_umount_activate(mntinfo4_t *, 1994 bool_t *, bool_t *, nfs4_ephemeral_tree_t **); 1995 extern int nfs4_ephemeral_umount(mntinfo4_t *, int, cred_t *, 1996 bool_t *, bool_t *, nfs4_ephemeral_tree_t **); 1997 extern void nfs4_ephemeral_umount_unlock(bool_t *, bool_t *, 1998 nfs4_ephemeral_tree_t **); 1999 2000 extern int nfs4_record_ephemeral_mount(mntinfo4_t *mi, vnode_t *mvp); 2001 2002 extern int wait_for_recall(vnode_t *, vnode_t *, nfs4_op_hint_t, 2003 nfs4_recov_state_t *); 2004 extern void nfs4_end_op_recall(vnode_t *, vnode_t *, nfs4_recov_state_t *); 2005 extern void nfs4_send_siglost(pid_t, mntinfo4_t *mi, vnode_t *vp, bool_t, 2006 int, nfsstat4); 2007 extern time_t nfs4err_delay_time; 2008 extern void nfs4_set_grace_wait(mntinfo4_t *); 2009 extern void nfs4_set_delay_wait(vnode_t *); 2010 extern int nfs4_wait_for_grace(mntinfo4_t *, nfs4_recov_state_t *); 2011 extern int nfs4_wait_for_delay(vnode_t *, nfs4_recov_state_t *); 2012 extern nfs4_bseqid_entry_t *nfs4_create_bseqid_entry(nfs4_open_owner_t *, 2013 nfs4_lock_owner_t *, vnode_t *, pid_t, nfs4_tag_type_t, 2014 seqid4); 2015 2016 extern void nfs4_resend_open_otw(vnode_t **, nfs4_lost_rqst_t *, 2017 nfs4_error_t *); 2018 extern void nfs4_resend_delegreturn(nfs4_lost_rqst_t *, nfs4_error_t *, 2019 nfs4_server_t *); 2020 extern int nfs4_rpc_retry_error(int); 2021 extern int nfs4_try_failover(nfs4_error_t *); 2022 extern void nfs4_free_msg(nfs4_debug_msg_t *); 2023 extern void nfs4_mnt_recov_kstat_init(vfs_t *); 2024 extern void nfs4_mi_kstat_inc_delay(mntinfo4_t *); 2025 extern void nfs4_mi_kstat_inc_no_grace(mntinfo4_t *); 2026 extern char *nfs4_stat_to_str(nfsstat4); 2027 extern char *nfs4_op_to_str(nfs_opnum4); 2028 2029 extern void nfs4_queue_event(nfs4_event_type_t, mntinfo4_t *, char *, 2030 uint_t, vnode_t *, vnode_t *, nfsstat4, char *, pid_t, 2031 nfs4_tag_type_t, nfs4_tag_type_t, seqid4, seqid4); 2032 extern void nfs4_queue_fact(nfs4_fact_type_t, mntinfo4_t *, nfsstat4, 2033 nfs4_recov_t, nfs_opnum4, bool_t, char *, int, vnode_t *); 2034 #pragma rarely_called(nfs4_queue_event) 2035 #pragma rarely_called(nfs4_queue_fact) 2036 2037 /* Used for preformed "." and ".." dirents */ 2038 extern char *nfs4_dot_entries; 2039 extern char *nfs4_dot_dot_entry; 2040 2041 #ifdef DEBUG 2042 extern uint_t nfs4_tsd_key; 2043 #endif 2044 2045 #endif /* _KERNEL */ 2046 2047 /* 2048 * Filehandle management. 2049 * 2050 * Filehandles can change in v4, so rather than storing the filehandle 2051 * directly in the rnode, etc., we manage the filehandle through one of 2052 * these objects. 2053 * Locking: sfh_fh and sfh_tree is protected by the filesystem's 2054 * mi_fh_lock. The reference count and flags are protected by sfh_lock. 2055 * sfh_mi is read-only. 2056 * 2057 * mntinfo4_t::mi_fh_lock > sfh_lock. 2058 */ 2059 2060 typedef struct nfs4_sharedfh { 2061 nfs_fh4 sfh_fh; /* key and current filehandle */ 2062 kmutex_t sfh_lock; 2063 uint_t sfh_refcnt; /* reference count */ 2064 uint_t sfh_flags; 2065 mntinfo4_t *sfh_mi; /* backptr to filesystem */ 2066 avl_node_t sfh_tree; /* used by avl package */ 2067 } nfs4_sharedfh_t; 2068 2069 #define SFH4_SAME(sfh1, sfh2) ((sfh1) == (sfh2)) 2070 2071 /* 2072 * Flags. 2073 */ 2074 #define SFH4_IN_TREE 0x1 /* currently in an AVL tree */ 2075 2076 #ifdef _KERNEL 2077 2078 extern void sfh4_createtab(avl_tree_t *); 2079 extern nfs4_sharedfh_t *sfh4_get(const nfs_fh4 *, mntinfo4_t *); 2080 extern nfs4_sharedfh_t *sfh4_put(const nfs_fh4 *, mntinfo4_t *, 2081 nfs4_sharedfh_t *); 2082 extern void sfh4_update(nfs4_sharedfh_t *, const nfs_fh4 *); 2083 extern void sfh4_copyval(const nfs4_sharedfh_t *, nfs4_fhandle_t *); 2084 extern void sfh4_hold(nfs4_sharedfh_t *); 2085 extern void sfh4_rele(nfs4_sharedfh_t **); 2086 extern void sfh4_printfhandle(const nfs4_sharedfh_t *); 2087 2088 #endif 2089 2090 /* 2091 * Path and file name management. 2092 * 2093 * This type stores the name of an entry in the filesystem and keeps enough 2094 * information that it can provide a complete path. All fields are 2095 * protected by fn_lock, except for the reference count, which is managed 2096 * using atomic add/subtract. 2097 * 2098 * Additionally shared filehandle for this fname is stored. 2099 * Normally, fn_get() when it creates this fname stores the passed in 2100 * shared fh in fn_sfh by doing sfh_hold. Similarly the path which 2101 * destroys this fname releases the reference on this fh by doing sfh_rele. 2102 * 2103 * fn_get uses the fn_sfh to refine the comparision in cases 2104 * where we have matched the name but have differing file handles, 2105 * this normally happens due to 2106 * 2107 * 1. Server side rename of a file/directory. 2108 * 2. Another client renaming a file/directory on the server. 2109 * 2110 * Differing names but same filehandle is possible as in the case of hardlinks, 2111 * but differing filehandles with same name component will later confuse 2112 * the client and can cause various panics. 2113 * 2114 * Lock order: child and then parent. 2115 */ 2116 2117 typedef struct nfs4_fname { 2118 struct nfs4_fname *fn_parent; /* parent name; null if fs root */ 2119 char *fn_name; /* the actual name */ 2120 ssize_t fn_len; /* strlen(fn_name) */ 2121 uint32_t fn_refcnt; /* reference count */ 2122 kmutex_t fn_lock; 2123 avl_node_t fn_tree; 2124 avl_tree_t fn_children; /* children, if any */ 2125 nfs4_sharedfh_t *fn_sfh; /* The fh for this fname */ 2126 } nfs4_fname_t; 2127 2128 #ifdef _KERNEL 2129 2130 extern vnode_t nfs4_xattr_notsupp_vnode; 2131 #define NFS4_XATTR_DIR_NOTSUPP &nfs4_xattr_notsupp_vnode 2132 2133 extern nfs4_fname_t *fn_get(nfs4_fname_t *, char *, nfs4_sharedfh_t *); 2134 extern void fn_hold(nfs4_fname_t *); 2135 extern void fn_rele(nfs4_fname_t **); 2136 extern char *fn_name(nfs4_fname_t *); 2137 extern char *fn_path(nfs4_fname_t *); 2138 extern void fn_move(nfs4_fname_t *, nfs4_fname_t *, char *); 2139 extern nfs4_fname_t *fn_parent(nfs4_fname_t *); 2140 2141 #endif 2142 2143 /* 2144 * Per-zone data for managing client handles, included in this file for the 2145 * benefit of MDB. 2146 */ 2147 struct nfs4_clnt { 2148 struct chhead *nfscl_chtable4; 2149 kmutex_t nfscl_chtable4_lock; 2150 zoneid_t nfscl_zoneid; 2151 list_node_t nfscl_node; 2152 struct clstat4 nfscl_stat; 2153 }; 2154 2155 #ifdef __cplusplus 2156 } 2157 #endif 2158 2159 #endif /* _NFS4_CLNT_H */ 2160