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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 24 * Copyright 2016 Nexenta Systems, Inc. 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 #define EX_NOHIDE 0x4000 /* traversable from exported parent */ 193 194 #ifdef _KERNEL 195 196 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 197 /* 198 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 199 * Right now, if this bit is on, we ignore the results of per NFS request 200 * access control. 201 */ 202 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 203 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 204 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 205 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 206 207 /* 208 * RPC_ALL is an or of all above bits to be used with "don't care" 209 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 210 * per-op flags. 211 */ 212 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 213 214 215 #ifdef VOLATILE_FH_TEST 216 struct ex_vol_rename { 217 nfs_fh4_fmt_t vrn_fh_fmt; 218 struct ex_vol_rename *vrn_next; 219 }; 220 #endif /* VOLATILE_FH_TEST */ 221 222 /* 223 * An auth cache client entry. This is the umbrella structure and contains all 224 * related auth_cache entries in the authc_tree AVL tree. 225 */ 226 struct auth_cache_clnt { 227 avl_node_t authc_link; 228 struct netbuf authc_addr; /* address of the client */ 229 krwlock_t authc_lock; /* protects authc_tree */ 230 avl_tree_t authc_tree; /* auth_cache entries */ 231 }; 232 233 /* 234 * An auth cache entry can exist in 6 states. 235 * 236 * A NEW entry was recently allocated and added to the cache. It does not 237 * contain the valid auth state yet. 238 * 239 * A WAITING entry is one which is actively engaging the user land mountd code 240 * to authenticate or re-authenticate it. The auth state might not be valid 241 * yet. The other threads should wait on auth_cv until the retrieving thread 242 * finishes the retrieval and changes the auth cache entry to FRESH, or NEW (in 243 * a case this entry had no valid auth state yet). 244 * 245 * A REFRESHING entry is one which is actively engaging the user land mountd 246 * code to re-authenticate the cache entry. There is currently no other thread 247 * waiting for the results of the refresh. 248 * 249 * A FRESH entry is one which is valid (it is either newly retrieved or has 250 * been refreshed at least once). 251 * 252 * A STALE entry is one which has been detected to be too old. The transition 253 * from FRESH to STALE prevents multiple threads from submitting refresh 254 * requests. 255 * 256 * An INVALID entry is one which was either STALE or REFRESHING and was deleted 257 * out of the encapsulating exi. Since we can't delete it yet, we mark it as 258 * INVALID, which lets the refresh thread know not to work on it and free it 259 * instead. 260 * 261 * Note that the auth state of the entry is valid, even if the entry is STALE. 262 * Just as you can eat stale bread, you can consume a stale cache entry. The 263 * only time the contents change could be during the transition from REFRESHING 264 * or WAITING to FRESH. 265 * 266 * Valid state transitions: 267 * 268 * alloc 269 * | 270 * v 271 * +-----+ 272 * +--->| NEW |------>free 273 * | +-----+ 274 * | | 275 * | v 276 * | +---------+ 277 * +<-| WAITING | 278 * ^ +---------+ 279 * | | 280 * | v 281 * | +<--------------------------+<---------------+ 282 * | | ^ | 283 * | v | | 284 * | +-------+ +-------+ +------------+ +---------+ 285 * +---| FRESH |--->| STALE |--->| REFRESHING |--->| WAITING | 286 * +-------+ +-------+ +------------+ +---------+ 287 * | | | 288 * | v | 289 * v +---------+ | 290 * free<-----| INVALID |<--------+ 291 * +---------+ 292 */ 293 typedef enum auth_state { 294 NFS_AUTH_FRESH, 295 NFS_AUTH_STALE, 296 NFS_AUTH_REFRESHING, 297 NFS_AUTH_INVALID, 298 NFS_AUTH_NEW, 299 NFS_AUTH_WAITING 300 } auth_state_t; 301 302 /* 303 * An authorization cache entry 304 * 305 * Either the state in auth_state will protect the 306 * contents or auth_lock must be held. 307 */ 308 struct auth_cache { 309 avl_node_t auth_link; 310 struct auth_cache_clnt *auth_clnt; 311 int auth_flavor; 312 cred_t *auth_clnt_cred; 313 uid_t auth_srv_uid; 314 gid_t auth_srv_gid; 315 uint_t auth_srv_ngids; 316 gid_t *auth_srv_gids; 317 int auth_access; 318 time_t auth_time; 319 time_t auth_freshness; 320 auth_state_t auth_state; 321 kmutex_t auth_lock; 322 kcondvar_t auth_cv; 323 }; 324 325 #define AUTH_TABLESIZE 32 326 327 /* 328 * Structure containing log file meta-data. 329 */ 330 struct log_file { 331 unsigned int lf_flags; /* flags (see below) */ 332 int lf_writers; /* outstanding writers */ 333 int lf_refcnt; /* references to this struct */ 334 caddr_t lf_path; /* buffer file location */ 335 vnode_t *lf_vp; /* vnode for the buffer file */ 336 kmutex_t lf_lock; 337 kcondvar_t lf_cv_waiters; 338 }; 339 340 /* 341 * log_file and log_buffer flags. 342 */ 343 #define L_WAITING 0x01 /* flush of in-core data to stable */ 344 /* storage in progress */ 345 #define L_PRINTED 0x02 /* error message printed to console */ 346 #define L_ERROR 0x04 /* error condition detected */ 347 348 /* 349 * The logging buffer information. 350 * This structure may be shared by multiple exportinfo structures, 351 * if they share the same buffer file. 352 * This structure contains the basic information about the buffer, such 353 * as it's location in the filesystem. 354 * 355 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 356 * and 'lb_next'. 357 * 'lb_path' is a write-once/read-many field which needs no locking, it is 358 * set before the structure is linked to any exportinfo structure. 359 * 'lb_next' is protected by the log_buffer_list_lock. 360 */ 361 struct log_buffer { 362 unsigned int lb_flags; /* L_ONLIST set? */ 363 int lb_refcnt; /* references to this struct */ 364 unsigned int lb_rec_id; /* used to generate unique id */ 365 caddr_t lb_path; /* buffer file pathname */ 366 struct log_file *lb_logfile; /* points to log_file structure */ 367 kmutex_t lb_lock; 368 struct log_buffer *lb_next; 369 kcondvar_t lb_cv_waiters; 370 caddr_t lb_records; /* linked list of records to write */ 371 int lb_num_recs; /* # of records to write */ 372 ssize_t lb_size_queued; /* number of bytes queued for write */ 373 }; 374 375 #define LOG_BUFFER_HOLD(lbp) { \ 376 mutex_enter(&(lbp)->lb_lock); \ 377 (lbp)->lb_refcnt++; \ 378 mutex_exit(&(lbp)->lb_lock); \ 379 } 380 381 #define LOG_BUFFER_RELE(lbp) { \ 382 log_buffer_rele(lbp); \ 383 } 384 385 /* 386 * Structure for character set conversion mapping based on client address. 387 */ 388 struct charset_cache { 389 struct charset_cache *next; 390 kiconv_t inbound; 391 kiconv_t outbound; 392 struct sockaddr client_addr; 393 }; 394 395 /* Forward declarations */ 396 struct exportinfo; 397 struct exp_visible; 398 struct svc_req; 399 400 /* 401 * Treenodes are used to build tree representing every node which is part 402 * of nfs server pseudo namespace. They are connected with both exportinfo 403 * and exp_visible struct. They were introduced to avoid lookup of ".." 404 * in the underlying file system during unshare, which was failing if the 405 * file system was forcibly unmounted or if the directory was removed. 406 * One exp_visible_t can be shared via several treenode_t, i.e. 407 * different tree_vis can point to the same exp_visible_t. 408 * This will happen if some directory is on two different shared paths: 409 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 410 * corresponding to /tmp/a and both will have same value in tree_vis. 411 * 412 * 413 * 414 * NEW DATA STRUCT ORIGINAL DATA STRUCT 415 * 416 * ns_root +---+ +----------+ 417 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 418 * +---+--------- ----+----------+ | a |-->| k |-->| b | 419 * /\ +---+ +---+ +---+ 420 * / \ . . . 421 * +---+...\......... ..................... . . 422 * *| a | \ +----------+ . . 423 * +---+-----\------- ----|REAL EXP a| . . 424 * / \ +----------+ . . 425 * / +===+... ............................. . 426 * / *| k | +----------+ . 427 * / +===+--- ----|REAL EXP k| . 428 * / +----------+ . 429 * +===+................ ..................................... 430 * *| b | +----------+ 431 * +===+---------------- ----|REAL EXP b|-->+---+ 432 * \ +----------+ | d | 433 * +===+............. ...................+---+ 434 * | d | +----------+ 435 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 436 * / +----------+ | e |-->| g | 437 * +---+................. ...................+---+ +---+ 438 * | e | . 439 * +---+ . 440 * \ . 441 * +---+.............. ............................ 442 * *| g | +----------+ 443 * +---+-------------- ----|REAL EXP g| 444 * +----------+ 445 * 446 * 447 * 448 * +===+ +---+ +---+ 449 * | b |..mountpoint | e |..directory/file *| a |..node is shared 450 * +===+ (VROOT) +---+ +---+ 451 * 452 * 453 * Bi-directional interconnect: 454 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 455 * One-way direction connection: 456 * treenode_t::tree_vis .........> exp_visible_t 457 */ 458 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 459 typedef struct treenode { 460 /* support for generic n-ary trees */ 461 struct treenode *tree_parent; 462 struct treenode *tree_child_first; 463 struct treenode *tree_sibling; /* next sibling */ 464 /* private, nfs specific part */ 465 struct exportinfo *tree_exi; 466 struct exp_visible *tree_vis; 467 } treenode_t; 468 469 /* 470 * TREE_ROOT checks if the node corresponds to a filesystem root 471 * TREE_EXPORTED checks if the node is explicitly shared 472 */ 473 474 #define TREE_ROOT(t) \ 475 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 476 477 #define TREE_EXPORTED(t) \ 478 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 479 480 /* Root of nfs pseudo namespace */ 481 extern treenode_t *ns_root; 482 483 #define EXPTABLESIZE 256 484 485 struct exp_hash { 486 struct exportinfo *prev; /* ptr to the previous exportinfo */ 487 struct exportinfo *next; /* ptr to the next exportinfo */ 488 struct exportinfo **bckt; /* backpointer to the hash bucket */ 489 }; 490 491 /* 492 * A node associated with an export entry on the 493 * list of exported filesystems. 494 * 495 * exi_count+exi_lock protects an individual exportinfo from being freed 496 * when in use. 497 * 498 * You must have the writer lock on exported_lock to add/delete an exportinfo 499 * structure to/from the list. 500 * 501 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 502 * underlying fs devno can change on each mount. When set, the server 503 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 504 * use exi_fsid because it is guaranteed to be persistent. This isn't 505 * in any way related to NFS4 volatile filehandles. 506 * 507 * The exi_cache_lock protects the exi_cache AVL trees. 508 */ 509 struct exportinfo { 510 struct exportdata exi_export; 511 fsid_t exi_fsid; 512 struct fid exi_fid; 513 struct exp_hash fid_hash; 514 struct exp_hash path_hash; 515 struct treenode *exi_tree; 516 fhandle_t exi_fh; 517 krwlock_t exi_cache_lock; 518 kmutex_t exi_lock; 519 uint_t exi_count; 520 vnode_t *exi_vp; 521 vnode_t *exi_dvp; 522 avl_tree_t *exi_cache[AUTH_TABLESIZE]; 523 struct log_buffer *exi_logbuffer; 524 struct exp_visible *exi_visible; 525 struct charset_cache *exi_charset; 526 unsigned exi_volatile_dev:1; 527 unsigned exi_moved:1; 528 #ifdef VOLATILE_FH_TEST 529 uint32_t exi_volatile_id; 530 struct ex_vol_rename *exi_vol_rename; 531 kmutex_t exi_vol_rename_lock; 532 #endif /* VOLATILE_FH_TEST */ 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 timespec_t vis_change; 575 }; 576 typedef struct exp_visible exp_visible_t; 577 578 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) 579 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) 580 581 #define EQFSID(fsidp1, fsidp2) \ 582 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ 583 ((fsidp1)->val[1] == (fsidp2)->val[1])) 584 585 #define EQFID(fidp1, fidp2) \ 586 ((fidp1)->fid_len == (fidp2)->fid_len && \ 587 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ 588 (uint_t)(fidp1)->fid_len) == 0) 589 590 #define exportmatch(exi, fsid, fid) \ 591 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) 592 593 /* 594 * Returns true iff exported filesystem is read-only to the given host. 595 * 596 * Note: this macro should be as fast as possible since it's called 597 * on each NFS modification request. 598 */ 599 #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp)) 600 #define rdonly4(req, cs) \ 601 (vn_is_readonly((cs)->vp) || \ 602 (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \ 603 NULL, NULL, NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED))) 604 605 extern int nfsauth4_access(struct exportinfo *, vnode_t *, 606 struct svc_req *, cred_t *, uid_t *, gid_t *, uint_t *, gid_t **); 607 extern int nfsauth4_secinfo_access(struct exportinfo *, 608 struct svc_req *, int, int, cred_t *); 609 extern int nfsauth_cache_clnt_compar(const void *, const void *); 610 extern int nfs_fhbcmp(char *, char *, int); 611 extern int nfs_exportinit(void); 612 extern void nfs_exportfini(void); 613 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *); 614 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); 615 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); 616 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); 617 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); 618 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); 619 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); 620 extern struct exportinfo *checkexport(fsid_t *, struct fid *); 621 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *); 622 extern void exi_hold(struct exportinfo *); 623 extern void exi_rele(struct exportinfo *); 624 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, 625 int *, bool_t); 626 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, 627 struct exportinfo **); 628 extern void export_link(struct exportinfo *); 629 extern void export_unlink(struct exportinfo *); 630 extern vnode_t *untraverse(vnode_t *); 631 extern int vn_is_nfs_reparse(vnode_t *, cred_t *); 632 extern int client_is_downrev(struct svc_req *); 633 extern char *build_symlink(vnode_t *, cred_t *, size_t *); 634 635 /* 636 * Functions that handle the NFSv4 server namespace 637 */ 638 extern exportinfo_t *vis2exi(treenode_t *); 639 extern int treeclimb_export(struct exportinfo *); 640 extern void treeclimb_unexport(struct exportinfo *); 641 extern int nfs_visible(struct exportinfo *, vnode_t *, int *); 642 extern int nfs_visible_inode(struct exportinfo *, ino64_t, 643 struct exp_visible **); 644 extern int has_visible(struct exportinfo *, vnode_t *); 645 extern void free_visible(struct exp_visible *); 646 extern int nfs_exported(struct exportinfo *, vnode_t *); 647 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 648 struct exp_visible *, struct exportdata *); 649 extern int vop_fid_pseudo(vnode_t *, fid_t *); 650 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 651 extern bool_t nfs_visible_change(struct exportinfo *, vnode_t *, 652 timespec_t *); 653 extern void tree_update_change(treenode_t *, timespec_t *); 654 /* 655 * Functions that handle the NFSv4 server namespace security flavors 656 * information. 657 */ 658 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 659 extern void srv_secinfo_list_free(struct secinfo *, int); 660 661 /* 662 * "public" and default (root) location for public filehandle 663 */ 664 extern struct exportinfo *exi_public, *exi_root; 665 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 666 extern krwlock_t exported_lock; 667 extern struct exportinfo *exptable[]; 668 669 /* 670 * Two macros for identifying public filehandles. 671 * A v2 public filehandle is 32 zero bytes. 672 * A v3 public filehandle is zero length. 673 */ 674 #define PUBLIC_FH2(fh) \ 675 ((fh)->fh_fsid.val[1] == 0 && \ 676 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 677 678 #define PUBLIC_FH3(fh) \ 679 ((fh)->fh3_length == 0) 680 681 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 682 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 683 684 #endif /* _KERNEL */ 685 686 #ifdef __cplusplus 687 } 688 #endif 689 690 #endif /* _NFS_EXPORT_H */ 691