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 */ 26 27 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 28 /* All Rights Reserved */ 29 30 #ifndef _NFS_EXPORT_H 31 #define _NFS_EXPORT_H 32 33 #include <nfs/nfs_sec.h> 34 #include <nfs/auth.h> 35 #include <sys/vnode.h> 36 #include <nfs/nfs4.h> 37 #include <sys/kiconv.h> 38 #include <sys/avl.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 /* 45 * nfs pseudo flavor number is owned by IANA. Need to make sure the 46 * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any 47 * new IANA defined pseudo flavor numbers. The chance for the overlap 48 * is very small since the growth of new flavor numbers is expected 49 * to be limited. 50 */ 51 #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */ 52 53 /* 54 * As duplicate flavors can be passed into exportfs in the arguments, we 55 * allocate a cleaned up array with non duplicate flavors on the stack. 56 * So we need to know how much to allocate. 57 */ 58 #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */ 59 60 /* 61 * Note: exported_lock is currently used to ensure the integrity of 62 * the secinfo fields. 63 */ 64 struct secinfo { 65 seconfig_t s_secinfo; /* /etc/nfssec.conf entry */ 66 unsigned int s_flags; /* flags (see below) */ 67 int32_t s_refcnt; /* reference count for tracking */ 68 /* how many children (self included) */ 69 /* use this flavor. */ 70 int s_window; /* window */ 71 uint_t s_rootid; /* UID to use for authorized roots */ 72 int s_rootcnt; /* count of root names */ 73 caddr_t *s_rootnames; /* array of root names */ 74 /* they are strings for AUTH_DES and */ 75 /* rpc_gss_principal_t for RPCSEC_GSS */ 76 }; 77 78 #ifdef _SYSCALL32 79 struct secinfo32 { 80 seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */ 81 uint32_t s_flags; /* flags (see below) */ 82 int32_t s_refcnt; /* reference count for tracking */ 83 /* how many children (self included) */ 84 /* use this flavor. */ 85 int32_t s_window; /* window */ 86 uint32_t s_rootid; /* UID to use for authorized roots */ 87 int32_t s_rootcnt; /* count of root names */ 88 caddr32_t s_rootnames; /* array of root names */ 89 /* they are strings for AUTH_DES and */ 90 /* rpc_gss_principal_t for RPCSEC_GSS */ 91 }; 92 #endif /* _SYSCALL32 */ 93 94 /* 95 * security negotiation related 96 */ 97 98 #define SEC_QUERY 0x01 /* query sec modes */ 99 100 struct sec_ol { 101 int sec_flags; /* security nego flags */ 102 uint_t sec_index; /* index into sec flavor array */ 103 }; 104 105 /* 106 * Per-mode flags (secinfo.s_flags) 107 */ 108 #define M_RO 0x01 /* exported ro to all */ 109 #define M_ROL 0x02 /* exported ro to all listed */ 110 #define M_RW 0x04 /* exported rw to all */ 111 #define M_RWL 0x08 /* exported ro to all listed */ 112 #define M_ROOT 0x10 /* root list is defined */ 113 #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */ 114 #define M_NONE 0x40 /* none list is defined */ 115 #define M_MAP 0x80 /* uidmap and/or gidmap is defined */ 116 117 /* invalid secinfo reference count */ 118 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) 119 120 /* last secinfo reference */ 121 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) 122 123 /* sec flavor explicitly shared for the exported node */ 124 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) 125 126 /* the only reference count left is for referring itself */ 127 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) 128 129 /* 130 * The export information passed to exportfs() (Version 2) 131 */ 132 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ 133 134 struct exportdata { 135 int ex_version; /* structure version */ 136 char *ex_path; /* exported path */ 137 size_t ex_pathlen; /* path length */ 138 int ex_flags; /* flags */ 139 unsigned int ex_anon; /* uid for unauthenticated requests */ 140 int ex_seccnt; /* count of security modes */ 141 struct secinfo *ex_secinfo; /* security mode info */ 142 char *ex_index; /* index file for public filesystem */ 143 char *ex_log_buffer; /* path to logging buffer file */ 144 size_t ex_log_bufferlen; /* buffer file path len */ 145 char *ex_tag; /* tag used to identify log config */ 146 size_t ex_taglen; /* tag length */ 147 }; 148 149 #ifdef _SYSCALL32 150 struct exportdata32 { 151 int32_t ex_version; /* structure version */ 152 caddr32_t ex_path; /* exported path */ 153 int32_t ex_pathlen; /* path length */ 154 int32_t ex_flags; /* flags */ 155 uint32_t ex_anon; /* uid for unauthenticated requests */ 156 int32_t ex_seccnt; /* count of security modes */ 157 caddr32_t ex_secinfo; /* security mode info */ 158 caddr32_t ex_index; /* index file for public filesystem */ 159 caddr32_t ex_log_buffer; /* path to logging buffer file */ 160 int32_t ex_log_bufferlen; /* buffer file path len */ 161 caddr32_t ex_tag; /* tag used to identify log config */ 162 int32_t ex_taglen; /* tag length */ 163 }; 164 #endif /* _SYSCALL32 */ 165 166 /* 167 * exported vfs flags. 168 */ 169 170 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ 171 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ 172 #define EX_PUBLIC 0x04 /* exported with public filehandle */ 173 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ 174 #define EX_INDEX 0x10 /* exported with index file specified */ 175 #define EX_LOG 0x20 /* logging enabled */ 176 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ 177 /* by default only operations which affect */ 178 /* transaction logging are enabled */ 179 #define EX_PSEUDO 0x80 /* pseudo filesystem export */ 180 #ifdef VOLATILE_FH_TEST 181 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ 182 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ 183 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ 184 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ 185 #endif /* VOLATILE_FH_TEST */ 186 187 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ 188 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers doesn't */ 189 /* fabricate ACL for VOP_GETSECATTR OTW call */ 190 191 #ifdef _KERNEL 192 193 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 194 /* 195 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 196 * Right now, if this bit is on, we ignore the results of per NFS request 197 * access control. 198 */ 199 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 200 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 201 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 202 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 203 204 /* 205 * RPC_ALL is an or of all above bits to be used with "don't care" 206 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 207 * per-op flags. 208 */ 209 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 210 211 212 #ifdef VOLATILE_FH_TEST 213 struct ex_vol_rename { 214 nfs_fh4_fmt_t vrn_fh_fmt; 215 struct ex_vol_rename *vrn_next; 216 }; 217 #endif /* VOLATILE_FH_TEST */ 218 219 /* 220 * An auth cache client entry. This is the umbrella structure and contains all 221 * related auth_cache entries in the authc_tree AVL tree. 222 */ 223 struct auth_cache_clnt { 224 avl_node_t authc_link; 225 struct netbuf authc_addr; /* address of the client */ 226 krwlock_t authc_lock; /* protects authc_tree */ 227 avl_tree_t authc_tree; /* auth_cache entries */ 228 }; 229 230 /* 231 * An auth cache entry can exist in 6 states. 232 * 233 * A NEW entry was recently allocated and added to the cache. It does not 234 * contain the valid auth state yet. 235 * 236 * A WAITING entry is one which is actively engaging the user land mountd code 237 * to authenticate or re-authenticate it. The auth state might not be valid 238 * yet. The other threads should wait on auth_cv until the retrieving thread 239 * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in 240 * a case this entry had no valid auth state yet). 241 * 242 * A REFRESHING entry is one which is actively engaging the user land mountd 243 * code to re-authenticate the cache entry. There is currently no other thread 244 * waiting for the results of the refresh. 245 * 246 * A FRESH entry is one which is valid (it is either newly retrieved or has 247 * been refreshed at least once). 248 * 249 * A STALE entry is one which has been detected to be too old. The transition 250 * from FRESH to STALE prevents multiple threads from submitting refresh 251 * requests. 252 * 253 * An INVALID entry is one which was either STALE or REFRESHING and was deleted 254 * out of the encapsulating exi. Since we can't delete it yet, we mark it as 255 * INVALID, which lets the refresh thread know not to work on it and free it 256 * instead. 257 * 258 * Note that the auth state of the entry is valid, even if the entry is STALE. 259 * Just as you can eat stale bread, you can consume a stale cache entry. The 260 * only time the contents change could be during the transition from REFRESHING 261 * or WAITING to FRESH. 262 * 263 * Valid state transitions: 264 * 265 * alloc 266 * | 267 * v 268 * +-----+ 269 * +--->| NEW |------>free 270 * | +-----+ 271 * | | 272 * | v 273 * | +---------+ 274 * +<-| WAITING | 275 * ^ +---------+ 276 * | | 277 * | v 278 * | +<--------------------------+<---------------+ 279 * | | ^ | 280 * | v | | 281 * | +-------+ +-------+ +------------+ +---------+ 282 * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING | 283 * +-------+ +-------+ +------------+ +---------+ 284 * | | | 285 * | v | 286 * v +---------+ | 287 * free<-----| INVALID |<--------+ 288 * +---------+ 289 */ 290 typedef enum auth_state { 291 NFS_AUTH_FRESH, 292 NFS_AUTH_STALE, 293 NFS_AUTH_REFRESHING, 294 NFS_AUTH_INVALID, 295 NFS_AUTH_NEW, 296 NFS_AUTH_WAITING 297 } auth_state_t; 298 299 /* 300 * An authorization cache entry 301 * 302 * Either the state in auth_state will protect the 303 * contents or auth_lock must be held. 304 */ 305 struct auth_cache { 306 avl_node_t auth_link; 307 struct auth_cache_clnt *auth_clnt; 308 int auth_flavor; 309 cred_t *auth_clnt_cred; 310 uid_t auth_srv_uid; 311 gid_t auth_srv_gid; 312 uint_t auth_srv_ngids; 313 gid_t *auth_srv_gids; 314 int auth_access; 315 time_t auth_time; 316 time_t auth_freshness; 317 auth_state_t auth_state; 318 kmutex_t auth_lock; 319 kcondvar_t auth_cv; 320 }; 321 322 #define AUTH_TABLESIZE 32 323 324 /* 325 * Structure containing log file meta-data. 326 */ 327 struct log_file { 328 unsigned int lf_flags; /* flags (see below) */ 329 int lf_writers; /* outstanding writers */ 330 int lf_refcnt; /* references to this struct */ 331 caddr_t lf_path; /* buffer file location */ 332 vnode_t *lf_vp; /* vnode for the buffer file */ 333 kmutex_t lf_lock; 334 kcondvar_t lf_cv_waiters; 335 }; 336 337 /* 338 * log_file and log_buffer flags. 339 */ 340 #define L_WAITING 0x01 /* flush of in-core data to stable */ 341 /* storage in progress */ 342 #define L_PRINTED 0x02 /* error message printed to console */ 343 #define L_ERROR 0x04 /* error condition detected */ 344 345 /* 346 * The logging buffer information. 347 * This structure may be shared by multiple exportinfo structures, 348 * if they share the same buffer file. 349 * This structure contains the basic information about the buffer, such 350 * as it's location in the filesystem. 351 * 352 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 353 * and 'lb_next'. 354 * 'lb_path' is a write-once/read-many field which needs no locking, it is 355 * set before the structure is linked to any exportinfo structure. 356 * 'lb_next' is protected by the log_buffer_list_lock. 357 */ 358 struct log_buffer { 359 unsigned int lb_flags; /* L_ONLIST set? */ 360 int lb_refcnt; /* references to this struct */ 361 unsigned int lb_rec_id; /* used to generate unique id */ 362 caddr_t lb_path; /* buffer file pathname */ 363 struct log_file *lb_logfile; /* points to log_file structure */ 364 kmutex_t lb_lock; 365 struct log_buffer *lb_next; 366 kcondvar_t lb_cv_waiters; 367 caddr_t lb_records; /* linked list of records to write */ 368 int lb_num_recs; /* # of records to write */ 369 ssize_t lb_size_queued; /* number of bytes queued for write */ 370 }; 371 372 #define LOG_BUFFER_HOLD(lbp) { \ 373 mutex_enter(&(lbp)->lb_lock); \ 374 (lbp)->lb_refcnt++; \ 375 mutex_exit(&(lbp)->lb_lock); \ 376 } 377 378 #define LOG_BUFFER_RELE(lbp) { \ 379 log_buffer_rele(lbp); \ 380 } 381 382 /* 383 * Structure for character set conversion mapping based on client address. 384 */ 385 struct charset_cache { 386 struct charset_cache *next; 387 kiconv_t inbound; 388 kiconv_t outbound; 389 struct sockaddr client_addr; 390 }; 391 392 /* Forward declarations */ 393 struct exportinfo; 394 struct exp_visible; 395 struct svc_req; 396 397 /* 398 * Treenodes are used to build tree representing every node which is part 399 * of nfs server pseudo namespace. They are connected with both exportinfo 400 * and exp_visible struct. They were introduced to avoid lookup of ".." 401 * in the underlying file system during unshare, which was failing if the 402 * file system was forcibly unmounted or if the directory was removed. 403 * One exp_visible_t can be shared via several treenode_t, i.e. 404 * different tree_vis can point to the same exp_visible_t. 405 * This will happen if some directory is on two different shared paths: 406 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 407 * corresponding to /tmp/a and both will have same value in tree_vis. 408 * 409 * 410 * 411 * NEW DATA STRUCT ORIGINAL DATA STRUCT 412 * 413 * ns_root +---+ +----------+ 414 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 415 * +---+--------- ----+----------+ | a |-->| k |-->| b | 416 * /\ +---+ +---+ +---+ 417 * / \ . . . 418 * +---+...\......... ..................... . . 419 * *| a | \ +----------+ . . 420 * +---+-----\------- ----|REAL EXP a| . . 421 * / \ +----------+ . . 422 * / +===+... ............................. . 423 * / *| k | +----------+ . 424 * / +===+--- ----|REAL EXP k| . 425 * / +----------+ . 426 * +===+................ ..................................... 427 * *| b | +----------+ 428 * +===+---------------- ----|REAL EXP b|-->+---+ 429 * \ +----------+ | d | 430 * +===+............. ...................+---+ 431 * | d | +----------+ 432 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 433 * / +----------+ | e |-->| g | 434 * +---+................. ...................+---+ +---+ 435 * | e | . 436 * +---+ . 437 * \ . 438 * +---+.............. ............................ 439 * *| g | +----------+ 440 * +---+-------------- ----|REAL EXP g| 441 * +----------+ 442 * 443 * 444 * 445 * +===+ +---+ +---+ 446 * | b |..mountpoint | e |..directory/file *| a |..node is shared 447 * +===+ (VROOT) +---+ +---+ 448 * 449 * 450 * Bi-directional interconnect: 451 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 452 * One-way direction connection: 453 * treenode_t::tree_vis .........> exp_visible_t 454 */ 455 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 456 typedef struct treenode { 457 /* support for generic n-ary trees */ 458 struct treenode *tree_parent; 459 struct treenode *tree_child_first; 460 struct treenode *tree_sibling; /* next sibling */ 461 /* private, nfs specific part */ 462 struct exportinfo *tree_exi; 463 struct exp_visible *tree_vis; 464 } treenode_t; 465 466 /* 467 * TREE_ROOT checks if the node corresponds to a filesystem root 468 * TREE_EXPORTED checks if the node is explicitly shared 469 */ 470 471 #define TREE_ROOT(t) \ 472 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 473 474 #define TREE_EXPORTED(t) \ 475 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 476 477 /* Root of nfs pseudo namespace */ 478 extern treenode_t *ns_root; 479 480 #define EXPTABLESIZE 256 481 482 struct exp_hash { 483 struct exportinfo *prev; /* ptr to the previous exportinfo */ 484 struct exportinfo *next; /* ptr to the next exportinfo */ 485 struct exportinfo **bckt; /* backpointer to the hash bucket */ 486 }; 487 488 /* 489 * A node associated with an export entry on the 490 * list of exported filesystems. 491 * 492 * exi_count+exi_lock protects an individual exportinfo from being freed 493 * when in use. 494 * 495 * You must have the writer lock on exported_lock to add/delete an exportinfo 496 * structure to/from the list. 497 * 498 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 499 * underlying fs devno can change on each mount. When set, the server 500 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 501 * use exi_fsid because it is guaranteed to be persistent. This isn't 502 * in any way related to NFS4 volatile filehandles. 503 * 504 * The exi_cache_lock protects the exi_cache AVL trees. 505 */ 506 struct exportinfo { 507 struct exportdata exi_export; 508 fsid_t exi_fsid; 509 struct fid exi_fid; 510 struct exp_hash fid_hash; 511 struct exp_hash path_hash; 512 struct treenode *exi_tree; 513 fhandle_t exi_fh; 514 krwlock_t exi_cache_lock; 515 kmutex_t exi_lock; 516 uint_t exi_count; 517 vnode_t *exi_vp; 518 vnode_t *exi_dvp; 519 avl_tree_t *exi_cache[AUTH_TABLESIZE]; 520 struct log_buffer *exi_logbuffer; 521 struct exp_visible *exi_visible; 522 struct charset_cache *exi_charset; 523 unsigned exi_volatile_dev:1; 524 unsigned exi_moved:1; 525 #ifdef VOLATILE_FH_TEST 526 uint32_t exi_volatile_id; 527 struct ex_vol_rename *exi_vol_rename; 528 kmutex_t exi_vol_rename_lock; 529 #endif /* VOLATILE_FH_TEST */ 530 int exi_id; 531 avl_node_t exi_id_link; 532 struct exp_kstats *exi_kstats; 533 }; 534 535 typedef struct exportinfo exportinfo_t; 536 typedef struct exportdata exportdata_t; 537 typedef struct secinfo secinfo_t; 538 539 /* 540 * exp_visible is a visible list per filesystem. It is for filesystems 541 * that may need a limited view of its contents. A pseudo export and 542 * a real export at the mount point (VROOT) which has a subtree shared 543 * has a visible list. 544 * 545 * The exi_visible field is NULL for normal, non=pseudo filesystems 546 * which do not have any subtree exported. If the field is non-null, 547 * it points to a list of visible entries, identified by vis_fid and/or 548 * vis_ino. The presence of a "visible" list means that if this export 549 * can only have a limited view, it can only view the entries in the 550 * exp_visible list. The directories in the fid list comprise paths that 551 * lead to exported directories. 552 * 553 * The vis_count field records the number of paths in this filesystem 554 * that use this directory. The vis_exported field is non-zero if the 555 * entry is an exported directory (leaf node). 556 * 557 * exp_visible itself is not reference counted. Each exp_visible is 558 * referenced twice: 559 * 1) from treenode::tree_vis 560 * 2) linked from exportinfo::exi_visible 561 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should 562 * be always freed only from exportinfo_t, never from treenode::tree_vis. 563 */ 564 565 struct exp_visible { 566 vnode_t *vis_vp; 567 fid_t vis_fid; 568 u_longlong_t vis_ino; 569 int vis_count; 570 int vis_exported; 571 struct exp_visible *vis_next; 572 struct secinfo *vis_secinfo; 573 int vis_seccnt; 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, int *); 642 extern int has_visible(struct exportinfo *, vnode_t *); 643 extern void free_visible(struct exp_visible *); 644 extern int nfs_exported(struct exportinfo *, vnode_t *); 645 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 646 struct exp_visible *, struct exportdata *); 647 extern int vop_fid_pseudo(vnode_t *, fid_t *); 648 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 649 /* 650 * Functions that handle the NFSv4 server namespace security flavors 651 * information. 652 */ 653 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 654 extern void srv_secinfo_list_free(struct secinfo *, int); 655 656 /* 657 * "public" and default (root) location for public filehandle 658 */ 659 extern struct exportinfo *exi_public, *exi_root; 660 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 661 extern krwlock_t exported_lock; 662 extern struct exportinfo *exptable[]; 663 664 /* 665 * exi_id support 666 */ 667 extern avl_tree_t exi_id_tree; 668 extern int exi_id_get_next(void); 669 670 /* 671 * Two macros for identifying public filehandles. 672 * A v2 public filehandle is 32 zero bytes. 673 * A v3 public filehandle is zero length. 674 */ 675 #define PUBLIC_FH2(fh) \ 676 ((fh)->fh_fsid.val[1] == 0 && \ 677 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 678 679 #define PUBLIC_FH3(fh) \ 680 ((fh)->fh3_length == 0) 681 682 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 683 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 684 685 #endif /* _KERNEL */ 686 687 #ifdef __cplusplus 688 } 689 #endif 690 691 #endif /* _NFS_EXPORT_H */ 692