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 (c) 1989, 2010, Oracle and/or its affiliates. All rights reserved. 23 * Copyright 2014 Nexenta Systems, Inc. All rights reserved. 24 */ 25 26 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 27 /* All Rights Reserved */ 28 29 #ifndef _NFS_EXPORT_H 30 #define _NFS_EXPORT_H 31 32 #include <nfs/nfs_sec.h> 33 #include <nfs/auth.h> 34 #include <sys/vnode.h> 35 #include <nfs/nfs4.h> 36 #include <sys/kiconv.h> 37 38 #ifdef __cplusplus 39 extern "C" { 40 #endif 41 42 /* 43 * nfs pseudo flavor number is owned by IANA. Need to make sure the 44 * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any 45 * new IANA defined pseudo flavor numbers. The chance for the overlap 46 * is very small since the growth of new flavor numbers is expected 47 * to be limited. 48 */ 49 #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */ 50 51 /* 52 * As duplicate flavors can be passed into exportfs in the arguments, we 53 * allocate a cleaned up array with non duplicate flavors on the stack. 54 * So we need to know how much to allocate. 55 */ 56 #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */ 57 58 /* 59 * Note: exported_lock is currently used to ensure the integrity of 60 * the secinfo fields. 61 */ 62 struct secinfo { 63 seconfig_t s_secinfo; /* /etc/nfssec.conf entry */ 64 unsigned int s_flags; /* flags (see below) */ 65 int32_t s_refcnt; /* reference count for tracking */ 66 /* how many children (self included) */ 67 /* use this flavor. */ 68 int s_window; /* window */ 69 uint_t s_rootid; /* UID to use for authorized roots */ 70 int s_rootcnt; /* count of root names */ 71 caddr_t *s_rootnames; /* array of root names */ 72 /* they are strings for AUTH_DES and */ 73 /* rpc_gss_principal_t for RPCSEC_GSS */ 74 }; 75 76 #ifdef _SYSCALL32 77 struct secinfo32 { 78 seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */ 79 uint32_t s_flags; /* flags (see below) */ 80 int32_t s_refcnt; /* reference count for tracking */ 81 /* how many children (self included) */ 82 /* use this flavor. */ 83 int32_t s_window; /* window */ 84 uint32_t s_rootid; /* UID to use for authorized roots */ 85 int32_t s_rootcnt; /* count of root names */ 86 caddr32_t s_rootnames; /* array of root names */ 87 /* they are strings for AUTH_DES and */ 88 /* rpc_gss_principal_t for RPCSEC_GSS */ 89 }; 90 #endif /* _SYSCALL32 */ 91 92 /* 93 * security negotiation related 94 */ 95 96 #define SEC_QUERY 0x01 /* query sec modes */ 97 98 struct sec_ol { 99 int sec_flags; /* security nego flags */ 100 uint_t sec_index; /* index into sec flavor array */ 101 }; 102 103 /* 104 * Per-mode flags (secinfo.s_flags) 105 */ 106 #define M_RO 0x01 /* exported ro to all */ 107 #define M_ROL 0x02 /* exported ro to all listed */ 108 #define M_RW 0x04 /* exported rw to all */ 109 #define M_RWL 0x08 /* exported ro to all listed */ 110 #define M_ROOT 0x10 /* root list is defined */ 111 #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */ 112 #define M_NONE 0x40 /* none list is defined */ 113 #define M_MAP 0x80 /* uidmap and/or gidmap is defined */ 114 115 /* invalid secinfo reference count */ 116 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) 117 118 /* last secinfo reference */ 119 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) 120 121 /* sec flavor explicitly shared for the exported node */ 122 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) 123 124 /* the only reference count left is for referring itself */ 125 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) 126 127 /* 128 * The export information passed to exportfs() (Version 2) 129 */ 130 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ 131 132 struct exportdata { 133 int ex_version; /* structure version */ 134 char *ex_path; /* exported path */ 135 size_t ex_pathlen; /* path length */ 136 int ex_flags; /* flags */ 137 unsigned int ex_anon; /* uid for unauthenticated requests */ 138 int ex_seccnt; /* count of security modes */ 139 struct secinfo *ex_secinfo; /* security mode info */ 140 char *ex_index; /* index file for public filesystem */ 141 char *ex_log_buffer; /* path to logging buffer file */ 142 size_t ex_log_bufferlen; /* buffer file path len */ 143 char *ex_tag; /* tag used to identify log config */ 144 size_t ex_taglen; /* tag length */ 145 }; 146 147 #ifdef _SYSCALL32 148 struct exportdata32 { 149 int32_t ex_version; /* structure version */ 150 caddr32_t ex_path; /* exported path */ 151 int32_t ex_pathlen; /* path length */ 152 int32_t ex_flags; /* flags */ 153 uint32_t ex_anon; /* uid for unauthenticated requests */ 154 int32_t ex_seccnt; /* count of security modes */ 155 caddr32_t ex_secinfo; /* security mode info */ 156 caddr32_t ex_index; /* index file for public filesystem */ 157 caddr32_t ex_log_buffer; /* path to logging buffer file */ 158 int32_t ex_log_bufferlen; /* buffer file path len */ 159 caddr32_t ex_tag; /* tag used to identify log config */ 160 int32_t ex_taglen; /* tag length */ 161 }; 162 #endif /* _SYSCALL32 */ 163 164 /* 165 * exported vfs flags. 166 */ 167 168 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ 169 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ 170 #define EX_PUBLIC 0x04 /* exported with public filehandle */ 171 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ 172 #define EX_INDEX 0x10 /* exported with index file specified */ 173 #define EX_LOG 0x20 /* logging enabled */ 174 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ 175 /* by default only operations which affect */ 176 /* transaction logging are enabled */ 177 #define EX_PSEUDO 0x80 /* pseudo filesystem export */ 178 #ifdef VOLATILE_FH_TEST 179 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ 180 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ 181 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ 182 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ 183 #endif /* VOLATILE_FH_TEST */ 184 185 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ 186 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers doesn't */ 187 /* fabricate ACL for VOP_GETSECATTR OTW call */ 188 189 #ifdef _KERNEL 190 191 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 192 /* 193 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 194 * Right now, if this bit is on, we ignore the results of per NFS request 195 * access control. 196 */ 197 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 198 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 199 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 200 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 201 202 /* 203 * RPC_ALL is an or of all above bits to be used with "don't care" 204 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 205 * per-op flags. 206 */ 207 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 208 209 210 #ifdef VOLATILE_FH_TEST 211 struct ex_vol_rename { 212 nfs_fh4_fmt_t vrn_fh_fmt; 213 struct ex_vol_rename *vrn_next; 214 }; 215 #endif /* VOLATILE_FH_TEST */ 216 217 /* 218 * An auth cache entry can exist in 4 active states, with the inactive 219 * state being indicated by no entry in the cache. 220 * 221 * A FRESH entry is one which is either new or has been refreshed at 222 * least once. 223 * 224 * A STALE entry is one which has been detected to be too old. The 225 * transistion from FRESH to STALE prevents multiple threads from 226 * submitting refresh requests. 227 * 228 * A REFRESHING entry is one which is actively engaging the user land 229 * mountd code to re-authenticate the cache entry. 230 * 231 * An INVALID entry was one which was either STALE or REFRESHING 232 * and was deleted out of the encapsulating exi. Since we can't 233 * delete it yet, we mark it as INVALID, which lets the refreshq 234 * know not to work on it. 235 * 236 * Note that the auth state of the entry is always valid, even if the 237 * entry is STALE. Just as you can eat stale bread, you can consume 238 * a stale cache entry. The only time the contents change could be 239 * during the transistion from REFRESHING to FRESH. 240 */ 241 typedef enum auth_state { 242 NFS_AUTH_FRESH, 243 NFS_AUTH_STALE, 244 NFS_AUTH_REFRESHING, 245 NFS_AUTH_INVALID 246 } auth_state_t; 247 248 /* 249 * An authorization cache entry 250 * 251 * Either the state in auth_state will protect the 252 * contents or auth_lock must be held. 253 */ 254 struct auth_cache { 255 struct netbuf auth_addr; 256 int auth_flavor; 257 uid_t auth_clnt_uid; 258 gid_t auth_clnt_gid; 259 uid_t auth_srv_uid; 260 gid_t auth_srv_gid; 261 int auth_access; 262 time_t auth_time; 263 time_t auth_freshness; 264 auth_state_t auth_state; 265 char *auth_netid; 266 kmutex_t auth_lock; 267 struct auth_cache *auth_next; 268 }; 269 270 #define AUTH_TABLESIZE 32 271 272 /* 273 * Structure containing log file meta-data. 274 */ 275 struct log_file { 276 unsigned int lf_flags; /* flags (see below) */ 277 int lf_writers; /* outstanding writers */ 278 int lf_refcnt; /* references to this struct */ 279 caddr_t lf_path; /* buffer file location */ 280 vnode_t *lf_vp; /* vnode for the buffer file */ 281 kmutex_t lf_lock; 282 kcondvar_t lf_cv_waiters; 283 }; 284 285 /* 286 * log_file and log_buffer flags. 287 */ 288 #define L_WAITING 0x01 /* flush of in-core data to stable */ 289 /* storage in progress */ 290 #define L_PRINTED 0x02 /* error message printed to console */ 291 #define L_ERROR 0x04 /* error condition detected */ 292 293 /* 294 * The logging buffer information. 295 * This structure may be shared by multiple exportinfo structures, 296 * if they share the same buffer file. 297 * This structure contains the basic information about the buffer, such 298 * as it's location in the filesystem. 299 * 300 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 301 * and 'lb_next'. 302 * 'lb_path' is a write-once/read-many field which needs no locking, it is 303 * set before the structure is linked to any exportinfo structure. 304 * 'lb_next' is protected by the log_buffer_list_lock. 305 */ 306 struct log_buffer { 307 unsigned int lb_flags; /* L_ONLIST set? */ 308 int lb_refcnt; /* references to this struct */ 309 unsigned int lb_rec_id; /* used to generate unique id */ 310 caddr_t lb_path; /* buffer file pathname */ 311 struct log_file *lb_logfile; /* points to log_file structure */ 312 kmutex_t lb_lock; 313 struct log_buffer *lb_next; 314 kcondvar_t lb_cv_waiters; 315 caddr_t lb_records; /* linked list of records to write */ 316 int lb_num_recs; /* # of records to write */ 317 ssize_t lb_size_queued; /* number of bytes queued for write */ 318 }; 319 320 #define LOG_BUFFER_HOLD(lbp) { \ 321 mutex_enter(&(lbp)->lb_lock); \ 322 (lbp)->lb_refcnt++; \ 323 mutex_exit(&(lbp)->lb_lock); \ 324 } 325 326 #define LOG_BUFFER_RELE(lbp) { \ 327 log_buffer_rele(lbp); \ 328 } 329 330 /* 331 * Structure for character set conversion mapping based on client address. 332 */ 333 struct charset_cache { 334 struct charset_cache *next; 335 kiconv_t inbound; 336 kiconv_t outbound; 337 struct sockaddr client_addr; 338 }; 339 340 /* Forward declarations */ 341 struct exportinfo; 342 struct exp_visible; 343 struct svc_req; 344 345 /* 346 * Treenodes are used to build tree representing every node which is part 347 * of nfs server pseudo namespace. They are connected with both exportinfo 348 * and exp_visible struct. They were introduced to avoid lookup of ".." 349 * in the underlying file system during unshare, which was failing if the 350 * file system was forcibly unmounted or if the directory was removed. 351 * One exp_visible_t can be shared via several treenode_t, i.e. 352 * different tree_vis can point to the same exp_visible_t. 353 * This will happen if some directory is on two different shared paths: 354 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 355 * corresponding to /tmp/a and both will have same value in tree_vis. 356 * 357 * 358 * 359 * NEW DATA STRUCT ORIGINAL DATA STRUCT 360 * 361 * ns_root +---+ +----------+ 362 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 363 * +---+--------- ----+----------+ | a |-->| k |-->| b | 364 * /\ +---+ +---+ +---+ 365 * / \ . . . 366 * +---+...\......... ..................... . . 367 * *| a | \ +----------+ . . 368 * +---+-----\------- ----|REAL EXP a| . . 369 * / \ +----------+ . . 370 * / +===+... ............................. . 371 * / *| k | +----------+ . 372 * / +===+--- ----|REAL EXP k| . 373 * / +----------+ . 374 * +===+................ ..................................... 375 * *| b | +----------+ 376 * +===+---------------- ----|REAL EXP b|-->+---+ 377 * \ +----------+ | d | 378 * +===+............. ...................+---+ 379 * | d | +----------+ 380 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 381 * / +----------+ | e |-->| g | 382 * +---+................. ...................+---+ +---+ 383 * | e | . 384 * +---+ . 385 * \ . 386 * +---+.............. ............................ 387 * *| g | +----------+ 388 * +---+-------------- ----|REAL EXP g| 389 * +----------+ 390 * 391 * 392 * 393 * +===+ +---+ +---+ 394 * | b |..mountpoint | e |..directory/file *| a |..node is shared 395 * +===+ (VROOT) +---+ +---+ 396 * 397 * 398 * Bi-directional interconnect: 399 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 400 * One-way direction connection: 401 * treenode_t::tree_vis .........> exp_visible_t 402 */ 403 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 404 typedef struct treenode { 405 /* support for generic n-ary trees */ 406 struct treenode *tree_parent; 407 struct treenode *tree_child_first; 408 struct treenode *tree_sibling; /* next sibling */ 409 /* private, nfs specific part */ 410 struct exportinfo *tree_exi; 411 struct exp_visible *tree_vis; 412 } treenode_t; 413 414 /* 415 * TREE_ROOT checks if the node corresponds to a filesystem root 416 * TREE_EXPORTED checks if the node is explicitly shared 417 */ 418 419 #define TREE_ROOT(t) \ 420 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 421 422 #define TREE_EXPORTED(t) \ 423 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 424 425 /* Root of nfs pseudo namespace */ 426 extern treenode_t *ns_root; 427 428 #define EXPTABLESIZE 256 429 430 struct exp_hash { 431 struct exportinfo *prev; /* ptr to the previous exportinfo */ 432 struct exportinfo *next; /* ptr to the next exportinfo */ 433 struct exportinfo **bckt; /* backpointer to the hash bucket */ 434 }; 435 436 /* 437 * A node associated with an export entry on the 438 * list of exported filesystems. 439 * 440 * exi_count+exi_lock protects an individual exportinfo from being freed 441 * when in use. 442 * 443 * You must have the writer lock on exported_lock to add/delete an exportinfo 444 * structure to/from the list. 445 * 446 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 447 * underlying fs devno can change on each mount. When set, the server 448 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 449 * use exi_fsid because it is guaranteed to be persistent. This isn't 450 * in any way related to NFS4 volatile filehandles. 451 */ 452 struct exportinfo { 453 struct exportdata exi_export; 454 fsid_t exi_fsid; 455 struct fid exi_fid; 456 struct exp_hash fid_hash; 457 struct exp_hash path_hash; 458 struct treenode *exi_tree; 459 fhandle_t exi_fh; 460 krwlock_t exi_cache_lock; 461 kmutex_t exi_lock; 462 uint_t exi_count; 463 vnode_t *exi_vp; 464 vnode_t *exi_dvp; 465 struct auth_cache *exi_cache[AUTH_TABLESIZE]; 466 struct log_buffer *exi_logbuffer; 467 struct exp_visible *exi_visible; 468 struct charset_cache *exi_charset; 469 unsigned exi_volatile_dev:1; 470 unsigned exi_moved:1; 471 #ifdef VOLATILE_FH_TEST 472 uint32_t exi_volatile_id; 473 struct ex_vol_rename *exi_vol_rename; 474 kmutex_t exi_vol_rename_lock; 475 #endif /* VOLATILE_FH_TEST */ 476 }; 477 478 typedef struct exportinfo exportinfo_t; 479 typedef struct exportdata exportdata_t; 480 typedef struct secinfo secinfo_t; 481 482 /* 483 * exp_visible is a visible list per filesystem. It is for filesystems 484 * that may need a limited view of its contents. A pseudo export and 485 * a real export at the mount point (VROOT) which has a subtree shared 486 * has a visible list. 487 * 488 * The exi_visible field is NULL for normal, non=pseudo filesystems 489 * which do not have any subtree exported. If the field is non-null, 490 * it points to a list of visible entries, identified by vis_fid and/or 491 * vis_ino. The presence of a "visible" list means that if this export 492 * can only have a limited view, it can only view the entries in the 493 * exp_visible list. The directories in the fid list comprise paths that 494 * lead to exported directories. 495 * 496 * The vis_count field records the number of paths in this filesystem 497 * that use this directory. The vis_exported field is non-zero if the 498 * entry is an exported directory (leaf node). 499 * 500 * exp_visible itself is not reference counted. Each exp_visible is 501 * referenced twice: 502 * 1) from treenode::tree_vis 503 * 2) linked from exportinfo::exi_visible 504 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should 505 * be always freed only from exportinfo_t, never from treenode::tree_vis. 506 */ 507 508 struct exp_visible { 509 vnode_t *vis_vp; 510 fid_t vis_fid; 511 u_longlong_t vis_ino; 512 int vis_count; 513 int vis_exported; 514 struct exp_visible *vis_next; 515 struct secinfo *vis_secinfo; 516 int vis_seccnt; 517 }; 518 typedef struct exp_visible exp_visible_t; 519 520 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) 521 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) 522 523 #define EQFSID(fsidp1, fsidp2) \ 524 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ 525 ((fsidp1)->val[1] == (fsidp2)->val[1])) 526 527 #define EQFID(fidp1, fidp2) \ 528 ((fidp1)->fid_len == (fidp2)->fid_len && \ 529 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ 530 (uint_t)(fidp1)->fid_len) == 0) 531 532 #define exportmatch(exi, fsid, fid) \ 533 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) 534 535 /* 536 * Returns true iff exported filesystem is read-only to the given host. 537 * 538 * Note: this macro should be as fast as possible since it's called 539 * on each NFS modification request. 540 */ 541 #define rdonly(ro, vp) ((ro) || vn_is_readonly(vp)) 542 #define rdonly4(req, cs) \ 543 (vn_is_readonly((cs)->vp) || \ 544 (nfsauth4_access((cs)->exi, (cs)->vp, (req), (cs)->basecr, NULL, \ 545 NULL) & (NFSAUTH_RO | NFSAUTH_LIMITED))) 546 547 extern int nfsauth4_access(struct exportinfo *, vnode_t *, 548 struct svc_req *, cred_t *, uid_t *, gid_t *); 549 extern int nfsauth4_secinfo_access(struct exportinfo *, 550 struct svc_req *, int, int, cred_t *); 551 extern int nfs_fhbcmp(char *, char *, int); 552 extern int nfs_exportinit(void); 553 extern void nfs_exportfini(void); 554 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *); 555 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); 556 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); 557 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); 558 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); 559 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); 560 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); 561 extern struct exportinfo *checkexport(fsid_t *, struct fid *); 562 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *); 563 extern void exi_hold(struct exportinfo *); 564 extern void exi_rele(struct exportinfo *); 565 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, 566 int *, bool_t); 567 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, 568 struct exportinfo **); 569 extern void export_link(struct exportinfo *); 570 extern void export_unlink(struct exportinfo *); 571 extern vnode_t *untraverse(vnode_t *); 572 extern int vn_is_nfs_reparse(vnode_t *, cred_t *); 573 extern int client_is_downrev(struct svc_req *); 574 extern char *build_symlink(vnode_t *, cred_t *, size_t *); 575 576 /* 577 * Functions that handle the NFSv4 server namespace 578 */ 579 extern exportinfo_t *vis2exi(treenode_t *); 580 extern int treeclimb_export(struct exportinfo *); 581 extern void treeclimb_unexport(struct exportinfo *); 582 extern int nfs_visible(struct exportinfo *, vnode_t *, int *); 583 extern int nfs_visible_inode(struct exportinfo *, ino64_t, int *); 584 extern int has_visible(struct exportinfo *, vnode_t *); 585 extern void free_visible(struct exp_visible *); 586 extern int nfs_exported(struct exportinfo *, vnode_t *); 587 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 588 struct exp_visible *, struct exportdata *); 589 extern int vop_fid_pseudo(vnode_t *, fid_t *); 590 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 591 /* 592 * Functions that handle the NFSv4 server namespace security flavors 593 * information. 594 */ 595 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 596 extern void srv_secinfo_list_free(struct secinfo *, int); 597 598 /* 599 * "public" and default (root) location for public filehandle 600 */ 601 extern struct exportinfo *exi_public, *exi_root; 602 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 603 extern krwlock_t exported_lock; 604 extern struct exportinfo *exptable[]; 605 606 /* 607 * Two macros for identifying public filehandles. 608 * A v2 public filehandle is 32 zero bytes. 609 * A v3 public filehandle is zero length. 610 */ 611 #define PUBLIC_FH2(fh) \ 612 ((fh)->fh_fsid.val[1] == 0 && \ 613 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 614 615 #define PUBLIC_FH3(fh) \ 616 ((fh)->fh3_length == 0) 617 618 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 619 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 620 621 #endif /* _KERNEL */ 622 623 #ifdef __cplusplus 624 } 625 #endif 626 627 #endif /* _NFS_EXPORT_H */ 628