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 /* 23 * Copyright 2016 Nexenta Systems, Inc. All rights reserved. 24 * Copyright (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 25 * Copyright 2016 Jason King. 26 */ 27 28 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 29 /* All Rights Reserved */ 30 31 #ifndef _NFS_EXPORT_H 32 #define _NFS_EXPORT_H 33 34 #include <nfs/nfs_sec.h> 35 #include <nfs/auth.h> 36 #include <sys/vnode.h> 37 #include <nfs/nfs4.h> 38 #include <sys/kiconv.h> 39 #include <sys/avl.h> 40 41 #ifdef __cplusplus 42 extern "C" { 43 #endif 44 45 /* 46 * nfs pseudo flavor number is owned by IANA. Need to make sure the 47 * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any 48 * new IANA defined pseudo flavor numbers. The chance for the overlap 49 * is very small since the growth of new flavor numbers is expected 50 * to be limited. 51 */ 52 #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */ 53 54 /* 55 * As duplicate flavors can be passed into exportfs in the arguments, we 56 * allocate a cleaned up array with non duplicate flavors on the stack. 57 * So we need to know how much to allocate. 58 */ 59 #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */ 60 61 /* 62 * Note: exported_lock is currently used to ensure the integrity of 63 * the secinfo fields. 64 */ 65 struct secinfo { 66 seconfig_t s_secinfo; /* /etc/nfssec.conf entry */ 67 unsigned int s_flags; /* flags (see below) */ 68 int32_t s_refcnt; /* reference count for tracking */ 69 /* how many children (self included) */ 70 /* use this flavor. */ 71 int s_window; /* window */ 72 uint_t s_rootid; /* UID to use for authorized roots */ 73 int s_rootcnt; /* count of root names */ 74 caddr_t *s_rootnames; /* array of root names */ 75 /* they are strings for AUTH_DES and */ 76 /* rpc_gss_principal_t for RPCSEC_GSS */ 77 }; 78 79 #ifdef _SYSCALL32 80 struct secinfo32 { 81 seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */ 82 uint32_t s_flags; /* flags (see below) */ 83 int32_t s_refcnt; /* reference count for tracking */ 84 /* how many children (self included) */ 85 /* use this flavor. */ 86 int32_t s_window; /* window */ 87 uint32_t s_rootid; /* UID to use for authorized roots */ 88 int32_t s_rootcnt; /* count of root names */ 89 caddr32_t s_rootnames; /* array of root names */ 90 /* they are strings for AUTH_DES and */ 91 /* rpc_gss_principal_t for RPCSEC_GSS */ 92 }; 93 #endif /* _SYSCALL32 */ 94 95 /* 96 * security negotiation related 97 */ 98 99 #define SEC_QUERY 0x01 /* query sec modes */ 100 101 struct sec_ol { 102 int sec_flags; /* security nego flags */ 103 uint_t sec_index; /* index into sec flavor array */ 104 }; 105 106 /* 107 * Per-mode flags (secinfo.s_flags) 108 */ 109 #define M_RO 0x01 /* exported ro to all */ 110 #define M_ROL 0x02 /* exported ro to all listed */ 111 #define M_RW 0x04 /* exported rw to all */ 112 #define M_RWL 0x08 /* exported ro to all listed */ 113 #define M_ROOT 0x10 /* root list is defined */ 114 #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */ 115 #define M_NONE 0x40 /* none list is defined */ 116 #define M_MAP 0x80 /* uidmap and/or gidmap is defined */ 117 118 /* invalid secinfo reference count */ 119 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) 120 121 /* last secinfo reference */ 122 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) 123 124 /* sec flavor explicitly shared for the exported node */ 125 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) 126 127 /* the only reference count left is for referring itself */ 128 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) 129 130 /* 131 * The export information passed to exportfs() (Version 2) 132 */ 133 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ 134 135 struct exportdata { 136 int ex_version; /* structure version */ 137 char *ex_path; /* exported path */ 138 size_t ex_pathlen; /* path length */ 139 int ex_flags; /* flags */ 140 unsigned int ex_anon; /* uid for unauthenticated requests */ 141 int ex_seccnt; /* count of security modes */ 142 struct secinfo *ex_secinfo; /* security mode info */ 143 char *ex_index; /* index file for public filesystem */ 144 char *ex_log_buffer; /* path to logging buffer file */ 145 size_t ex_log_bufferlen; /* buffer file path len */ 146 char *ex_tag; /* tag used to identify log config */ 147 size_t ex_taglen; /* tag length */ 148 }; 149 150 #ifdef _SYSCALL32 151 struct exportdata32 { 152 int32_t ex_version; /* structure version */ 153 caddr32_t ex_path; /* exported path */ 154 int32_t ex_pathlen; /* path length */ 155 int32_t ex_flags; /* flags */ 156 uint32_t ex_anon; /* uid for unauthenticated requests */ 157 int32_t ex_seccnt; /* count of security modes */ 158 caddr32_t ex_secinfo; /* security mode info */ 159 caddr32_t ex_index; /* index file for public filesystem */ 160 caddr32_t ex_log_buffer; /* path to logging buffer file */ 161 int32_t ex_log_bufferlen; /* buffer file path len */ 162 caddr32_t ex_tag; /* tag used to identify log config */ 163 int32_t ex_taglen; /* tag length */ 164 }; 165 #endif /* _SYSCALL32 */ 166 167 /* 168 * exported vfs flags. 169 */ 170 171 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ 172 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ 173 #define EX_PUBLIC 0x04 /* exported with public filehandle */ 174 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ 175 #define EX_INDEX 0x10 /* exported with index file specified */ 176 #define EX_LOG 0x20 /* logging enabled */ 177 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ 178 /* by default only operations which affect */ 179 /* transaction logging are enabled */ 180 #define EX_PSEUDO 0x80 /* pseudo filesystem export */ 181 #ifdef VOLATILE_FH_TEST 182 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ 183 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ 184 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ 185 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ 186 #endif /* VOLATILE_FH_TEST */ 187 188 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ 189 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers won't */ 190 /* fabricate an aclent_t ACL on file systems */ 191 /* that don't support aclent_t ACLs */ 192 193 #ifdef _KERNEL 194 195 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 196 /* 197 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 198 * Right now, if this bit is on, we ignore the results of per NFS request 199 * access control. 200 */ 201 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 202 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 203 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 204 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 205 206 /* 207 * RPC_ALL is an or of all above bits to be used with "don't care" 208 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 209 * per-op flags. 210 */ 211 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 212 213 214 #ifdef VOLATILE_FH_TEST 215 struct ex_vol_rename { 216 nfs_fh4_fmt_t vrn_fh_fmt; 217 struct ex_vol_rename *vrn_next; 218 }; 219 #endif /* VOLATILE_FH_TEST */ 220 221 /* 222 * An auth cache client entry. This is the umbrella structure and contains all 223 * related auth_cache entries in the authc_tree AVL tree. 224 */ 225 struct auth_cache_clnt { 226 avl_node_t authc_link; 227 struct netbuf authc_addr; /* address of the client */ 228 krwlock_t authc_lock; /* protects authc_tree */ 229 avl_tree_t authc_tree; /* auth_cache entries */ 230 }; 231 232 /* 233 * An auth cache entry can exist in 6 states. 234 * 235 * A NEW entry was recently allocated and added to the cache. It does not 236 * contain the valid auth state yet. 237 * 238 * A WAITING entry is one which is actively engaging the user land mountd code 239 * to authenticate or re-authenticate it. The auth state might not be valid 240 * yet. The other threads should wait on auth_cv until the retrieving thread 241 * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in 242 * a case this entry had no valid auth state yet). 243 * 244 * A REFRESHING entry is one which is actively engaging the user land mountd 245 * code to re-authenticate the cache entry. There is currently no other thread 246 * waiting for the results of the refresh. 247 * 248 * A FRESH entry is one which is valid (it is either newly retrieved or has 249 * been refreshed at least once). 250 * 251 * A STALE entry is one which has been detected to be too old. The transition 252 * from FRESH to STALE prevents multiple threads from submitting refresh 253 * requests. 254 * 255 * An INVALID entry is one which was either STALE or REFRESHING and was deleted 256 * out of the encapsulating exi. Since we can't delete it yet, we mark it as 257 * INVALID, which lets the refresh thread know not to work on it and free it 258 * instead. 259 * 260 * Note that the auth state of the entry is valid, even if the entry is STALE. 261 * Just as you can eat stale bread, you can consume a stale cache entry. The 262 * only time the contents change could be during the transition from REFRESHING 263 * or WAITING to FRESH. 264 * 265 * Valid state transitions: 266 * 267 * alloc 268 * | 269 * v 270 * +-----+ 271 * +--->| NEW |------>free 272 * | +-----+ 273 * | | 274 * | v 275 * | +---------+ 276 * +<-| WAITING | 277 * ^ +---------+ 278 * | | 279 * | v 280 * | +<--------------------------+<---------------+ 281 * | | ^ | 282 * | v | | 283 * | +-------+ +-------+ +------------+ +---------+ 284 * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING | 285 * +-------+ +-------+ +------------+ +---------+ 286 * | | | 287 * | v | 288 * v +---------+ | 289 * free<-----| INVALID |<--------+ 290 * +---------+ 291 */ 292 typedef enum auth_state { 293 NFS_AUTH_FRESH, 294 NFS_AUTH_STALE, 295 NFS_AUTH_REFRESHING, 296 NFS_AUTH_INVALID, 297 NFS_AUTH_NEW, 298 NFS_AUTH_WAITING 299 } auth_state_t; 300 301 /* 302 * An authorization cache entry 303 * 304 * Either the state in auth_state will protect the 305 * contents or auth_lock must be held. 306 */ 307 struct auth_cache { 308 avl_node_t auth_link; 309 struct auth_cache_clnt *auth_clnt; 310 int auth_flavor; 311 cred_t *auth_clnt_cred; 312 uid_t auth_srv_uid; 313 gid_t auth_srv_gid; 314 uint_t auth_srv_ngids; 315 gid_t *auth_srv_gids; 316 int auth_access; 317 time_t auth_time; 318 time_t auth_freshness; 319 auth_state_t auth_state; 320 kmutex_t auth_lock; 321 kcondvar_t auth_cv; 322 }; 323 324 #define AUTH_TABLESIZE 32 325 326 /* 327 * Structure containing log file meta-data. 328 */ 329 struct log_file { 330 unsigned int lf_flags; /* flags (see below) */ 331 int lf_writers; /* outstanding writers */ 332 int lf_refcnt; /* references to this struct */ 333 caddr_t lf_path; /* buffer file location */ 334 vnode_t *lf_vp; /* vnode for the buffer file */ 335 kmutex_t lf_lock; 336 kcondvar_t lf_cv_waiters; 337 }; 338 339 /* 340 * log_file and log_buffer flags. 341 */ 342 #define L_WAITING 0x01 /* flush of in-core data to stable */ 343 /* storage in progress */ 344 #define L_PRINTED 0x02 /* error message printed to console */ 345 #define L_ERROR 0x04 /* error condition detected */ 346 347 /* 348 * The logging buffer information. 349 * This structure may be shared by multiple exportinfo structures, 350 * if they share the same buffer file. 351 * This structure contains the basic information about the buffer, such 352 * as it's location in the filesystem. 353 * 354 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 355 * and 'lb_next'. 356 * 'lb_path' is a write-once/read-many field which needs no locking, it is 357 * set before the structure is linked to any exportinfo structure. 358 * 'lb_next' is protected by the log_buffer_list_lock. 359 */ 360 struct log_buffer { 361 unsigned int lb_flags; /* L_ONLIST set? */ 362 int lb_refcnt; /* references to this struct */ 363 unsigned int lb_rec_id; /* used to generate unique id */ 364 caddr_t lb_path; /* buffer file pathname */ 365 struct log_file *lb_logfile; /* points to log_file structure */ 366 kmutex_t lb_lock; 367 struct log_buffer *lb_next; 368 kcondvar_t lb_cv_waiters; 369 caddr_t lb_records; /* linked list of records to write */ 370 int lb_num_recs; /* # of records to write */ 371 ssize_t lb_size_queued; /* number of bytes queued for write */ 372 }; 373 374 #define LOG_BUFFER_HOLD(lbp) { \ 375 mutex_enter(&(lbp)->lb_lock); \ 376 (lbp)->lb_refcnt++; \ 377 mutex_exit(&(lbp)->lb_lock); \ 378 } 379 380 #define LOG_BUFFER_RELE(lbp) { \ 381 log_buffer_rele(lbp); \ 382 } 383 384 /* 385 * Structure for character set conversion mapping based on client address. 386 */ 387 struct charset_cache { 388 struct charset_cache *next; 389 kiconv_t inbound; 390 kiconv_t outbound; 391 struct sockaddr client_addr; 392 }; 393 394 /* Forward declarations */ 395 struct exportinfo; 396 struct exp_visible; 397 struct svc_req; 398 399 /* 400 * Treenodes are used to build tree representing every node which is part 401 * of nfs server pseudo namespace. They are connected with both exportinfo 402 * and exp_visible struct. They were introduced to avoid lookup of ".." 403 * in the underlying file system during unshare, which was failing if the 404 * file system was forcibly unmounted or if the directory was removed. 405 * One exp_visible_t can be shared via several treenode_t, i.e. 406 * different tree_vis can point to the same exp_visible_t. 407 * This will happen if some directory is on two different shared paths: 408 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 409 * corresponding to /tmp/a and both will have same value in tree_vis. 410 * 411 * 412 * 413 * NEW DATA STRUCT ORIGINAL DATA STRUCT 414 * 415 * ns_root +---+ +----------+ 416 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 417 * +---+--------- ----+----------+ | a |-->| k |-->| b | 418 * /\ +---+ +---+ +---+ 419 * / \ . . . 420 * +---+...\......... ..................... . . 421 * *| a | \ +----------+ . . 422 * +---+-----\------- ----|REAL EXP a| . . 423 * / \ +----------+ . . 424 * / +===+... ............................. . 425 * / *| k | +----------+ . 426 * / +===+--- ----|REAL EXP k| . 427 * / +----------+ . 428 * +===+................ ..................................... 429 * *| b | +----------+ 430 * +===+---------------- ----|REAL EXP b|-->+---+ 431 * \ +----------+ | d | 432 * +===+............. ...................+---+ 433 * | d | +----------+ 434 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 435 * / +----------+ | e |-->| g | 436 * +---+................. ...................+---+ +---+ 437 * | e | . 438 * +---+ . 439 * \ . 440 * +---+.............. ............................ 441 * *| g | +----------+ 442 * +---+-------------- ----|REAL EXP g| 443 * +----------+ 444 * 445 * 446 * 447 * +===+ +---+ +---+ 448 * | b |..mountpoint | e |..directory/file *| a |..node is shared 449 * +===+ (VROOT) +---+ +---+ 450 * 451 * 452 * Bi-directional interconnect: 453 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 454 * One-way direction connection: 455 * treenode_t::tree_vis .........> exp_visible_t 456 */ 457 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 458 typedef struct treenode { 459 /* support for generic n-ary trees */ 460 struct treenode *tree_parent; 461 struct treenode *tree_child_first; 462 struct treenode *tree_sibling; /* next sibling */ 463 /* private, nfs specific part */ 464 struct exportinfo *tree_exi; 465 struct exp_visible *tree_vis; 466 } treenode_t; 467 468 /* 469 * TREE_ROOT checks if the node corresponds to a filesystem root 470 * TREE_EXPORTED checks if the node is explicitly shared 471 */ 472 473 #define TREE_ROOT(t) \ 474 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 475 476 #define TREE_EXPORTED(t) \ 477 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 478 479 /* Root of nfs pseudo namespace */ 480 extern treenode_t *ns_root; 481 482 #define EXPTABLESIZE 256 483 484 struct exp_hash { 485 struct exportinfo *prev; /* ptr to the previous exportinfo */ 486 struct exportinfo *next; /* ptr to the next exportinfo */ 487 struct exportinfo **bckt; /* backpointer to the hash bucket */ 488 }; 489 490 /* 491 * A node associated with an export entry on the 492 * list of exported filesystems. 493 * 494 * exi_count+exi_lock protects an individual exportinfo from being freed 495 * when in use. 496 * 497 * You must have the writer lock on exported_lock to add/delete an exportinfo 498 * structure to/from the list. 499 * 500 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 501 * underlying fs devno can change on each mount. When set, the server 502 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 503 * use exi_fsid because it is guaranteed to be persistent. This isn't 504 * in any way related to NFS4 volatile filehandles. 505 * 506 * The exi_cache_lock protects the exi_cache AVL trees. 507 */ 508 struct exportinfo { 509 struct exportdata exi_export; 510 fsid_t exi_fsid; 511 struct fid exi_fid; 512 struct exp_hash fid_hash; 513 struct exp_hash path_hash; 514 struct treenode *exi_tree; 515 fhandle_t exi_fh; 516 krwlock_t exi_cache_lock; 517 kmutex_t exi_lock; 518 uint_t exi_count; 519 vnode_t *exi_vp; 520 vnode_t *exi_dvp; 521 avl_tree_t *exi_cache[AUTH_TABLESIZE]; 522 struct log_buffer *exi_logbuffer; 523 struct exp_visible *exi_visible; 524 struct charset_cache *exi_charset; 525 unsigned exi_volatile_dev:1; 526 unsigned exi_moved:1; 527 #ifdef VOLATILE_FH_TEST 528 uint32_t exi_volatile_id; 529 struct ex_vol_rename *exi_vol_rename; 530 kmutex_t exi_vol_rename_lock; 531 #endif /* VOLATILE_FH_TEST */ 532 }; 533 534 typedef struct exportinfo exportinfo_t; 535 typedef struct exportdata exportdata_t; 536 typedef struct secinfo secinfo_t; 537 538 /* 539 * exp_visible is a visible list per filesystem. It is for filesystems 540 * that may need a limited view of its contents. A pseudo export and 541 * a real export at the mount point (VROOT) which has a subtree shared 542 * has a visible list. 543 * 544 * The exi_visible field is NULL for normal, non-pseudo filesystems 545 * which do not have any subtree exported. If the field is non-null, 546 * it points to a list of visible entries, identified by vis_fid and/or 547 * vis_ino. The presence of a "visible" list means that if this export 548 * can only have a limited view, it can only view the entries in the 549 * exp_visible list. The directories in the fid list comprise paths that 550 * lead to exported directories. 551 * 552 * The vis_count field records the number of paths in this filesystem 553 * that use this directory. The vis_exported field is non-zero if the 554 * entry is an exported directory (leaf node). 555 * 556 * exp_visible itself is not reference counted. Each exp_visible is 557 * referenced twice: 558 * 1) from treenode::tree_vis 559 * 2) linked from exportinfo::exi_visible 560 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should 561 * be always freed only from exportinfo_t, never from treenode::tree_vis. 562 */ 563 564 struct exp_visible { 565 vnode_t *vis_vp; 566 fid_t vis_fid; 567 u_longlong_t vis_ino; 568 int vis_count; 569 int vis_exported; 570 struct exp_visible *vis_next; 571 struct secinfo *vis_secinfo; 572 int vis_seccnt; 573 timespec_t vis_change; 574 }; 575 typedef struct exp_visible exp_visible_t; 576 577 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) 578 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) 579 580 #define EQFSID(fsidp1, fsidp2) \ 581 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ 582 ((fsidp1)->val[1] == (fsidp2)->val[1])) 583 584 #define EQFID(fidp1, fidp2) \ 585 ((fidp1)->fid_len == (fidp2)->fid_len && \ 586 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ 587 (uint_t)(fidp1)->fid_len) == 0) 588 589 #define exportmatch(exi, fsid, fid) \ 590 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) 591 592 /* 593 * Returns true iff exported filesystem is read-only to the given host. 594 * 595 * Note: this macro should be as fast as possible since it's called 596 * on each NFS modification request. 597 */ 598 #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp)) 599 #define rdonly4(req, cs) \ 600 (vn_is_readonly((cs)->vp) || \ 601 (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \ 602 NULL, NULL, NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED))) 603 604 extern int nfsauth4_access(struct exportinfo *, vnode_t *, 605 struct svc_req *, cred_t *, uid_t *, gid_t *, uint_t *, gid_t **); 606 extern int nfsauth4_secinfo_access(struct exportinfo *, 607 struct svc_req *, int, int, cred_t *); 608 extern int nfsauth_cache_clnt_compar(const void *, const void *); 609 extern int nfs_fhbcmp(char *, char *, int); 610 extern int nfs_exportinit(void); 611 extern void nfs_exportfini(void); 612 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *); 613 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); 614 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); 615 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); 616 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); 617 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); 618 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); 619 extern struct exportinfo *checkexport(fsid_t *, struct fid *); 620 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *); 621 extern void exi_hold(struct exportinfo *); 622 extern void exi_rele(struct exportinfo *); 623 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, 624 int *, bool_t); 625 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, 626 struct exportinfo **); 627 extern void export_link(struct exportinfo *); 628 extern void export_unlink(struct exportinfo *); 629 extern vnode_t *untraverse(vnode_t *); 630 extern int vn_is_nfs_reparse(vnode_t *, cred_t *); 631 extern int client_is_downrev(struct svc_req *); 632 extern char *build_symlink(vnode_t *, cred_t *, size_t *); 633 634 /* 635 * Functions that handle the NFSv4 server namespace 636 */ 637 extern exportinfo_t *vis2exi(treenode_t *); 638 extern int treeclimb_export(struct exportinfo *); 639 extern void treeclimb_unexport(struct exportinfo *); 640 extern int nfs_visible(struct exportinfo *, vnode_t *, int *); 641 extern int nfs_visible_inode(struct exportinfo *, ino64_t, 642 struct exp_visible **); 643 extern int has_visible(struct exportinfo *, vnode_t *); 644 extern void free_visible(struct exp_visible *); 645 extern int nfs_exported(struct exportinfo *, vnode_t *); 646 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 647 struct exp_visible *, struct exportdata *); 648 extern int vop_fid_pseudo(vnode_t *, fid_t *); 649 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 650 extern bool_t nfs_visible_change(struct exportinfo *, vnode_t *, 651 timespec_t *); 652 extern void tree_update_change(treenode_t *, timespec_t *); 653 /* 654 * Functions that handle the NFSv4 server namespace security flavors 655 * information. 656 */ 657 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 658 extern void srv_secinfo_list_free(struct secinfo *, int); 659 660 /* 661 * "public" and default (root) location for public filehandle 662 */ 663 extern struct exportinfo *exi_public, *exi_root; 664 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 665 extern krwlock_t exported_lock; 666 extern struct exportinfo *exptable[]; 667 668 /* 669 * Two macros for identifying public filehandles. 670 * A v2 public filehandle is 32 zero bytes. 671 * A v3 public filehandle is zero length. 672 */ 673 #define PUBLIC_FH2(fh) \ 674 ((fh)->fh_fsid.val[1] == 0 && \ 675 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 676 677 #define PUBLIC_FH3(fh) \ 678 ((fh)->fh3_length == 0) 679 680 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 681 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 682 683 #endif /* _KERNEL */ 684 685 #ifdef __cplusplus 686 } 687 #endif 688 689 #endif /* _NFS_EXPORT_H */ 690