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 */ 24 25 /* Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T */ 26 /* All Rights Reserved */ 27 28 #ifndef _NFS_EXPORT_H 29 #define _NFS_EXPORT_H 30 31 #include <nfs/nfs_sec.h> 32 #include <nfs/auth.h> 33 #include <sys/vnode.h> 34 #include <nfs/nfs4.h> 35 #include <sys/kiconv.h> 36 37 #ifdef __cplusplus 38 extern "C" { 39 #endif 40 41 /* 42 * nfs pseudo flavor number is owned by IANA. Need to make sure the 43 * Solaris specific NFS_FLAVOR_NOMAP number will not overlap with any 44 * new IANA defined pseudo flavor numbers. The chance for the overlap 45 * is very small since the growth of new flavor numbers is expected 46 * to be limited. 47 */ 48 #define NFS_FLAVOR_NOMAP 999999 /* no nfs flavor mapping */ 49 50 /* 51 * As duplicate flavors can be passed into exportfs in the arguments, we 52 * allocate a cleaned up array with non duplicate flavors on the stack. 53 * So we need to know how much to allocate. 54 */ 55 #define MAX_FLAVORS 6 /* none, sys, dh, krb5, krb5i krb5p */ 56 57 /* 58 * Note: exported_lock is currently used to ensure the integrity of 59 * the secinfo fields. 60 */ 61 struct secinfo { 62 seconfig_t s_secinfo; /* /etc/nfssec.conf entry */ 63 unsigned int s_flags; /* flags (see below) */ 64 int32_t s_refcnt; /* reference count for tracking */ 65 /* how many children (self included) */ 66 /* use this flavor. */ 67 int s_window; /* window */ 68 uint_t s_rootid; /* UID to use for authorized roots */ 69 int s_rootcnt; /* count of root names */ 70 caddr_t *s_rootnames; /* array of root names */ 71 /* they are strings for AUTH_DES and */ 72 /* rpc_gss_principal_t for RPCSEC_GSS */ 73 }; 74 75 #ifdef _SYSCALL32 76 struct secinfo32 { 77 seconfig32_t s_secinfo; /* /etc/nfssec.conf entry */ 78 uint32_t s_flags; /* flags (see below) */ 79 int32_t s_refcnt; /* reference count for tracking */ 80 /* how many children (self included) */ 81 /* use this flavor. */ 82 int32_t s_window; /* window */ 83 uint32_t s_rootid; /* UID to use for authorized roots */ 84 int32_t s_rootcnt; /* count of root names */ 85 caddr32_t s_rootnames; /* array of root names */ 86 /* they are strings for AUTH_DES and */ 87 /* rpc_gss_principal_t for RPCSEC_GSS */ 88 }; 89 #endif /* _SYSCALL32 */ 90 91 /* 92 * security negotiation related 93 */ 94 95 #define SEC_QUERY 0x01 /* query sec modes */ 96 97 struct sec_ol { 98 int sec_flags; /* security nego flags */ 99 uint_t sec_index; /* index into sec flavor array */ 100 }; 101 102 /* 103 * Per-mode flags (secinfo.s_flags) 104 */ 105 #define M_RO 0x01 /* exported ro to all */ 106 #define M_ROL 0x02 /* exported ro to all listed */ 107 #define M_RW 0x04 /* exported rw to all */ 108 #define M_RWL 0x08 /* exported ro to all listed */ 109 #define M_ROOT 0x10 /* root list is defined */ 110 #define M_4SEC_EXPORTED 0x20 /* this is an explicitly shared flavor */ 111 #define M_NONE 0x40 /* none list is defined */ 112 113 /* invalid secinfo reference count */ 114 #define SEC_REF_INVALID(p) ((p)->s_refcnt < 1) 115 116 /* last secinfo reference */ 117 #define SEC_REF_LAST(p) ((p)->s_refcnt == 1) 118 119 /* sec flavor explicitly shared for the exported node */ 120 #define SEC_REF_EXPORTED(p) ((p)->s_flags & M_4SEC_EXPORTED) 121 122 /* the only reference count left is for referring itself */ 123 #define SEC_REF_SELF(p) (SEC_REF_LAST(p) && SEC_REF_EXPORTED(p)) 124 125 /* 126 * The export information passed to exportfs() (Version 2) 127 */ 128 #define EX_CURRENT_VERSION 2 /* current version of exportdata struct */ 129 130 struct exportdata { 131 int ex_version; /* structure version */ 132 char *ex_path; /* exported path */ 133 size_t ex_pathlen; /* path length */ 134 int ex_flags; /* flags */ 135 unsigned int ex_anon; /* uid for unauthenticated requests */ 136 int ex_seccnt; /* count of security modes */ 137 struct secinfo *ex_secinfo; /* security mode info */ 138 char *ex_index; /* index file for public filesystem */ 139 char *ex_log_buffer; /* path to logging buffer file */ 140 size_t ex_log_bufferlen; /* buffer file path len */ 141 char *ex_tag; /* tag used to identify log config */ 142 size_t ex_taglen; /* tag length */ 143 }; 144 145 #ifdef _SYSCALL32 146 struct exportdata32 { 147 int32_t ex_version; /* structure version */ 148 caddr32_t ex_path; /* exported path */ 149 int32_t ex_pathlen; /* path length */ 150 int32_t ex_flags; /* flags */ 151 uint32_t ex_anon; /* uid for unauthenticated requests */ 152 int32_t ex_seccnt; /* count of security modes */ 153 caddr32_t ex_secinfo; /* security mode info */ 154 caddr32_t ex_index; /* index file for public filesystem */ 155 caddr32_t ex_log_buffer; /* path to logging buffer file */ 156 int32_t ex_log_bufferlen; /* buffer file path len */ 157 caddr32_t ex_tag; /* tag used to identify log config */ 158 int32_t ex_taglen; /* tag length */ 159 }; 160 #endif /* _SYSCALL32 */ 161 162 /* 163 * exported vfs flags. 164 */ 165 166 #define EX_NOSUID 0x01 /* exported with unsetable set[ug]ids */ 167 #define EX_ACLOK 0x02 /* exported with maximal access if acl exists */ 168 #define EX_PUBLIC 0x04 /* exported with public filehandle */ 169 #define EX_NOSUB 0x08 /* no nfs_getfh or MCL below export point */ 170 #define EX_INDEX 0x10 /* exported with index file specified */ 171 #define EX_LOG 0x20 /* logging enabled */ 172 #define EX_LOG_ALLOPS 0x40 /* logging of all RPC operations enabled */ 173 /* by default only operations which affect */ 174 /* transaction logging are enabled */ 175 #define EX_PSEUDO 0x80 /* pseudo filesystem export */ 176 #ifdef VOLATILE_FH_TEST 177 #define EX_VOLFH 0x100 /* XXX nfsv4 fh may expire anytime */ 178 #define EX_VOLRNM 0x200 /* XXX nfsv4 fh expire at rename */ 179 #define EX_VOLMIG 0x400 /* XXX nfsv4 fh expire at migration */ 180 #define EX_NOEXPOPEN 0x800 /* XXX nfsv4 fh no expire with open */ 181 #endif /* VOLATILE_FH_TEST */ 182 183 #define EX_CHARMAP 0x1000 /* NFS may need a character set conversion */ 184 #define EX_NOACLFAB 0x2000 /* If set, NFSv2 and v3 servers doesn't */ 185 /* fabricate ACL for VOP_GETSECATTR OTW call */ 186 187 #ifdef _KERNEL 188 189 #define RPC_IDEMPOTENT 0x1 /* idempotent or not */ 190 /* 191 * Be very careful about which NFS procedures get the RPC_ALLOWANON bit. 192 * Right now, it this bit is on, we ignore the results of per NFS request 193 * access control. 194 */ 195 #define RPC_ALLOWANON 0x2 /* allow anonymous access */ 196 #define RPC_MAPRESP 0x4 /* use mapped response buffer */ 197 #define RPC_AVOIDWORK 0x8 /* do work avoidance for dups */ 198 #define RPC_PUBLICFH_OK 0x10 /* allow use of public filehandle */ 199 200 /* 201 * RPC_ALL is an or of all above bits to be used with "don't care" 202 * nfsv4 ops. The flags of an nfsv4 request is the bit-AND of the 203 * per-op flags. 204 */ 205 #define RPC_ALL (RPC_IDEMPOTENT|RPC_ALLOWANON|RPC_AVOIDWORK|RPC_PUBLICFH_OK) 206 207 208 #ifdef VOLATILE_FH_TEST 209 struct ex_vol_rename { 210 nfs_fh4_fmt_t vrn_fh_fmt; 211 struct ex_vol_rename *vrn_next; 212 }; 213 #endif /* VOLATILE_FH_TEST */ 214 215 /* 216 * An auth cache entry can exist in 4 active states, with the inactive 217 * state being indicated by no entry in the cache. 218 * 219 * A FRESH entry is one which is either new or has been refreshed at 220 * least once. 221 * 222 * A STALE entry is one which has been detected to be too old. The 223 * transistion from FRESH to STALE prevents multiple threads from 224 * submitting refresh requests. 225 * 226 * A REFRESHING entry is one which is actively engaging the user land 227 * mountd code to re-authenticate the cache entry. 228 * 229 * An INVALID entry was one which was either STALE or REFRESHING 230 * and was deleted out of the encapsulating exi. Since we can't 231 * delete it yet, we mark it as INVALID, which lets the refreshq 232 * know not to work on it. 233 * 234 * Note that the auth state of the entry is always valid, even if the 235 * entry is STALE. Just as you can eat stale bread, you can consume 236 * a stale cache entry. The only time the contents change could be 237 * during the transistion from REFRESHING to FRESH. 238 */ 239 typedef enum auth_state { 240 NFS_AUTH_FRESH, 241 NFS_AUTH_STALE, 242 NFS_AUTH_REFRESHING, 243 NFS_AUTH_INVALID 244 } auth_state_t; 245 246 /* 247 * An authorization cache entry 248 * 249 * Either the state in auth_state will protect the 250 * contents or auth_lock must be held. 251 */ 252 struct auth_cache { 253 struct netbuf auth_addr; 254 int auth_flavor; 255 int auth_access; 256 time_t auth_time; 257 time_t auth_freshness; 258 auth_state_t auth_state; 259 char *auth_netid; 260 kmutex_t auth_lock; 261 struct auth_cache *auth_next; 262 }; 263 264 #define AUTH_TABLESIZE 32 265 266 /* 267 * Structure containing log file meta-data. 268 */ 269 struct log_file { 270 unsigned int lf_flags; /* flags (see below) */ 271 int lf_writers; /* outstanding writers */ 272 int lf_refcnt; /* references to this struct */ 273 caddr_t lf_path; /* buffer file location */ 274 vnode_t *lf_vp; /* vnode for the buffer file */ 275 kmutex_t lf_lock; 276 kcondvar_t lf_cv_waiters; 277 }; 278 279 /* 280 * log_file and log_buffer flags. 281 */ 282 #define L_WAITING 0x01 /* flush of in-core data to stable */ 283 /* storage in progress */ 284 #define L_PRINTED 0x02 /* error message printed to console */ 285 #define L_ERROR 0x04 /* error condition detected */ 286 287 /* 288 * The logging buffer information. 289 * This structure may be shared by multiple exportinfo structures, 290 * if they share the same buffer file. 291 * This structure contains the basic information about the buffer, such 292 * as it's location in the filesystem. 293 * 294 * 'lb_lock' protects all the fields in this structure except for 'lb_path', 295 * and 'lb_next'. 296 * 'lb_path' is a write-once/read-many field which needs no locking, it is 297 * set before the structure is linked to any exportinfo structure. 298 * 'lb_next' is protected by the log_buffer_list_lock. 299 */ 300 struct log_buffer { 301 unsigned int lb_flags; /* L_ONLIST set? */ 302 int lb_refcnt; /* references to this struct */ 303 unsigned int lb_rec_id; /* used to generate unique id */ 304 caddr_t lb_path; /* buffer file pathname */ 305 struct log_file *lb_logfile; /* points to log_file structure */ 306 kmutex_t lb_lock; 307 struct log_buffer *lb_next; 308 kcondvar_t lb_cv_waiters; 309 caddr_t lb_records; /* linked list of records to write */ 310 int lb_num_recs; /* # of records to write */ 311 ssize_t lb_size_queued; /* number of bytes queued for write */ 312 }; 313 314 #define LOG_BUFFER_HOLD(lbp) { \ 315 mutex_enter(&(lbp)->lb_lock); \ 316 (lbp)->lb_refcnt++; \ 317 mutex_exit(&(lbp)->lb_lock); \ 318 } 319 320 #define LOG_BUFFER_RELE(lbp) { \ 321 log_buffer_rele(lbp); \ 322 } 323 324 /* 325 * Structure for character set conversion mapping based on client address. 326 */ 327 struct charset_cache { 328 struct charset_cache *next; 329 kiconv_t inbound; 330 kiconv_t outbound; 331 struct sockaddr client_addr; 332 }; 333 334 /* Forward declarations */ 335 struct exportinfo; 336 struct exp_visible; 337 struct svc_req; 338 339 /* 340 * Treenodes are used to build tree representing every node which is part 341 * of nfs server pseudo namespace. They are connected with both exportinfo 342 * and exp_visible struct. They were introduced to avoid lookup of ".." 343 * in the underlying file system during unshare, which was failing if the 344 * file system was forcibly unmounted or if the directory was removed. 345 * One exp_visible_t can be shared via several treenode_t, i.e. 346 * different tree_vis can point to the same exp_visible_t. 347 * This will happen if some directory is on two different shared paths: 348 * E.g. after share /tmp/a/b1 and share /tmp/a/b2 there will be two treenodes 349 * corresponding to /tmp/a and both will have same value in tree_vis. 350 * 351 * 352 * 353 * NEW DATA STRUCT ORIGINAL DATA STRUCT 354 * 355 * ns_root +---+ +----------+ 356 * | / | |PSEUDO EXP|-->+---+ +---+ +---+ 357 * +---+--------- ----+----------+ | a |-->| k |-->| b | 358 * /\ +---+ +---+ +---+ 359 * / \ . . . 360 * +---+...\......... ..................... . . 361 * *| a | \ +----------+ . . 362 * +---+-----\------- ----|REAL EXP a| . . 363 * / \ +----------+ . . 364 * / +===+... ............................. . 365 * / *| k | +----------+ . 366 * / +===+--- ----|REAL EXP k| . 367 * / +----------+ . 368 * +===+................ ..................................... 369 * *| b | +----------+ 370 * +===+---------------- ----|REAL EXP b|-->+---+ 371 * \ +----------+ | d | 372 * +===+............. ...................+---+ 373 * | d | +----------+ 374 * +===+------------- ----|PSEUDO EXP|-->+---+ +---+ 375 * / +----------+ | e |-->| g | 376 * +---+................. ...................+---+ +---+ 377 * | e | . 378 * +---+ . 379 * \ . 380 * +---+.............. ............................ 381 * *| g | +----------+ 382 * +---+-------------- ----|REAL EXP g| 383 * +----------+ 384 * 385 * 386 * 387 * +===+ +---+ +---+ 388 * | b |..mountpoint | e |..directory/file *| a |..node is shared 389 * +===+ (VROOT) +---+ +---+ 390 * 391 * 392 * Bi-directional interconnect: 393 * treenode_t::tree_exi --------- exportinfo_t::exi_tree 394 * One-way direction connection: 395 * treenode_t::tree_vis .........> exp_visible_t 396 */ 397 /* Access to treenode_t is under protection of exported_lock RW_LOCK */ 398 typedef struct treenode { 399 /* support for generic n-ary trees */ 400 struct treenode *tree_parent; 401 struct treenode *tree_child_first; 402 struct treenode *tree_sibling; /* next sibling */ 403 /* private, nfs specific part */ 404 struct exportinfo *tree_exi; 405 struct exp_visible *tree_vis; 406 } treenode_t; 407 408 /* 409 * TREE_ROOT checks if the node corresponds to a filesystem root 410 * TREE_EXPORTED checks if the node is explicitly shared 411 */ 412 413 #define TREE_ROOT(t) \ 414 ((t)->tree_exi && (t)->tree_exi->exi_vp->v_flag & VROOT) 415 416 #define TREE_EXPORTED(t) \ 417 ((t)->tree_exi && !PSEUDO((t)->tree_exi)) 418 419 /* Root of nfs pseudo namespace */ 420 extern treenode_t *ns_root; 421 422 #define EXPTABLESIZE 256 423 424 struct exp_hash { 425 struct exportinfo *prev; /* ptr to the previous exportinfo */ 426 struct exportinfo *next; /* ptr to the next exportinfo */ 427 struct exportinfo **bckt; /* backpointer to the hash bucket */ 428 }; 429 430 /* 431 * A node associated with an export entry on the 432 * list of exported filesystems. 433 * 434 * exi_count+exi_lock protects an individual exportinfo from being freed 435 * when in use. 436 * 437 * You must have the writer lock on exported_lock to add/delete an exportinfo 438 * structure to/from the list. 439 * 440 * exi_volatile_dev maps to VSW_VOLATILEDEV. It means that the 441 * underlying fs devno can change on each mount. When set, the server 442 * should not use va_fsid for a GETATTR(FATTR4_FSID) reply. It must 443 * use exi_fsid because it is guaranteed to be persistent. This isn't 444 * in any way related to NFS4 volatile filehandles. 445 */ 446 struct exportinfo { 447 struct exportdata exi_export; 448 fsid_t exi_fsid; 449 struct fid exi_fid; 450 struct exp_hash fid_hash; 451 struct exp_hash path_hash; 452 struct treenode *exi_tree; 453 fhandle_t exi_fh; 454 krwlock_t exi_cache_lock; 455 kmutex_t exi_lock; 456 uint_t exi_count; 457 vnode_t *exi_vp; 458 vnode_t *exi_dvp; 459 struct auth_cache *exi_cache[AUTH_TABLESIZE]; 460 struct log_buffer *exi_logbuffer; 461 struct exp_visible *exi_visible; 462 struct charset_cache *exi_charset; 463 unsigned exi_volatile_dev:1; 464 unsigned exi_moved:1; 465 #ifdef VOLATILE_FH_TEST 466 uint32_t exi_volatile_id; 467 struct ex_vol_rename *exi_vol_rename; 468 kmutex_t exi_vol_rename_lock; 469 #endif /* VOLATILE_FH_TEST */ 470 }; 471 472 typedef struct exportinfo exportinfo_t; 473 typedef struct exportdata exportdata_t; 474 typedef struct secinfo secinfo_t; 475 476 /* 477 * exp_visible is a visible list per filesystem. It is for filesystems 478 * that may need a limited view of its contents. A pseudo export and 479 * a real export at the mount point (VROOT) which has a subtree shared 480 * has a visible list. 481 * 482 * The exi_visible field is NULL for normal, non=pseudo filesystems 483 * which do not have any subtree exported. If the field is non-null, 484 * it points to a list of visible entries, identified by vis_fid and/or 485 * vis_ino. The presence of a "visible" list means that if this export 486 * can only have a limited view, it can only view the entries in the 487 * exp_visible list. The directories in the fid list comprise paths that 488 * lead to exported directories. 489 * 490 * The vis_count field records the number of paths in this filesystem 491 * that use this directory. The vis_exported field is non-zero if the 492 * entry is an exported directory (leaf node). 493 * 494 * exp_visible itself is not reference counted. Each exp_visible is 495 * referenced twice: 496 * 1) from treenode::tree_vis 497 * 2) linked from exportinfo::exi_visible 498 * The 'owner' of exp_visible is the exportinfo structure. exp_visible should 499 * be always freed only from exportinfo_t, never from treenode::tree_vis. 500 */ 501 502 struct exp_visible { 503 vnode_t *vis_vp; 504 fid_t vis_fid; 505 u_longlong_t vis_ino; 506 int vis_count; 507 int vis_exported; 508 struct exp_visible *vis_next; 509 struct secinfo *vis_secinfo; 510 int vis_seccnt; 511 }; 512 typedef struct exp_visible exp_visible_t; 513 514 #define PSEUDO(exi) ((exi)->exi_export.ex_flags & EX_PSEUDO) 515 #define EXP_LINKED(exi) ((exi)->fid_hash.bckt != NULL) 516 517 #define EQFSID(fsidp1, fsidp2) \ 518 (((fsidp1)->val[0] == (fsidp2)->val[0]) && \ 519 ((fsidp1)->val[1] == (fsidp2)->val[1])) 520 521 #define EQFID(fidp1, fidp2) \ 522 ((fidp1)->fid_len == (fidp2)->fid_len && \ 523 bcmp((char *)(fidp1)->fid_data, (char *)(fidp2)->fid_data, \ 524 (uint_t)(fidp1)->fid_len) == 0) 525 526 #define exportmatch(exi, fsid, fid) \ 527 (EQFSID(&(exi)->exi_fsid, (fsid)) && EQFID(&(exi)->exi_fid, (fid))) 528 529 /* 530 * Returns true iff exported filesystem is read-only to the given host. 531 * 532 * Note: this macro should be as fast as possible since it's called 533 * on each NFS modification request. 534 */ 535 #define rdonly(exi, req) (nfsauth_access(exi, req) & NFSAUTH_RO) 536 #define rdonly4(exi, vp, req) \ 537 (vn_is_readonly(vp) || \ 538 (nfsauth4_access(exi, vp, req) & (NFSAUTH_RO | NFSAUTH_LIMITED))) 539 540 extern int nfsauth4_access(struct exportinfo *, vnode_t *, 541 struct svc_req *); 542 extern int nfsauth4_secinfo_access(struct exportinfo *, 543 struct svc_req *, int, int); 544 extern int nfs_fhbcmp(char *, char *, int); 545 extern int nfs_exportinit(void); 546 extern void nfs_exportfini(void); 547 extern int chk_clnt_sec(struct exportinfo *, struct svc_req *req); 548 extern int makefh(fhandle_t *, struct vnode *, struct exportinfo *); 549 extern int makefh_ol(fhandle_t *, struct exportinfo *, uint_t); 550 extern int makefh3(nfs_fh3 *, struct vnode *, struct exportinfo *); 551 extern int makefh3_ol(nfs_fh3 *, struct exportinfo *, uint_t); 552 extern vnode_t *nfs_fhtovp(fhandle_t *, struct exportinfo *); 553 extern vnode_t *nfs3_fhtovp(nfs_fh3 *, struct exportinfo *); 554 extern vnode_t *lm_fhtovp(fhandle_t *fh); 555 extern vnode_t *lm_nfs3_fhtovp(nfs_fh3 *fh); 556 extern struct exportinfo *checkexport(fsid_t *, struct fid *); 557 extern struct exportinfo *checkexport4(fsid_t *, struct fid *, vnode_t *vp); 558 extern void exi_hold(struct exportinfo *); 559 extern void exi_rele(struct exportinfo *); 560 extern struct exportinfo *nfs_vptoexi(vnode_t *, vnode_t *, cred_t *, int *, 561 int *, bool_t); 562 extern int nfs_check_vpexi(vnode_t *, vnode_t *, cred_t *, 563 struct exportinfo **); 564 extern void export_link(struct exportinfo *); 565 extern void export_unlink(struct exportinfo *); 566 extern vnode_t *untraverse(vnode_t *); 567 extern int vn_is_nfs_reparse(vnode_t *, cred_t *); 568 extern int client_is_downrev(struct svc_req *); 569 extern char *build_symlink(vnode_t *, cred_t *, size_t *); 570 571 /* 572 * Functions that handle the NFSv4 server namespace 573 */ 574 extern exportinfo_t *vis2exi(treenode_t *); 575 extern int treeclimb_export(struct exportinfo *); 576 extern void treeclimb_unexport(struct exportinfo *); 577 extern int nfs_visible(struct exportinfo *, vnode_t *, int *); 578 extern int nfs_visible_inode(struct exportinfo *, ino64_t, int *); 579 extern int has_visible(struct exportinfo *, vnode_t *); 580 extern void free_visible(struct exp_visible *); 581 extern int nfs_exported(struct exportinfo *, vnode_t *); 582 extern struct exportinfo *pseudo_exportfs(vnode_t *, fid_t *, 583 struct exp_visible *, struct exportdata *); 584 extern int vop_fid_pseudo(vnode_t *, fid_t *fidp); 585 extern int nfs4_vget_pseudo(struct exportinfo *, vnode_t **, fid_t *); 586 /* 587 * Functions that handle the NFSv4 server namespace security flavors 588 * information. 589 */ 590 extern void srv_secinfo_exp2pseu(struct exportdata *, struct exportdata *); 591 extern void srv_secinfo_list_free(struct secinfo *, int); 592 593 /* 594 * "public" and default (root) location for public filehandle 595 */ 596 extern struct exportinfo *exi_public, *exi_root; 597 extern fhandle_t nullfh2; /* for comparing V2 filehandles */ 598 extern krwlock_t exported_lock; 599 extern struct exportinfo *exptable[]; 600 601 /* 602 * Two macros for identifying public filehandles. 603 * A v2 public filehandle is 32 zero bytes. 604 * A v3 public filehandle is zero length. 605 */ 606 #define PUBLIC_FH2(fh) \ 607 ((fh)->fh_fsid.val[1] == 0 && \ 608 bcmp((fh), &nullfh2, sizeof (fhandle_t)) == 0) 609 610 #define PUBLIC_FH3(fh) \ 611 ((fh)->fh3_length == 0) 612 613 extern int makefh4(nfs_fh4 *, struct vnode *, struct exportinfo *); 614 extern vnode_t *nfs4_fhtovp(nfs_fh4 *, struct exportinfo *, nfsstat4 *); 615 616 #endif /* _KERNEL */ 617 618 #ifdef __cplusplus 619 } 620 #endif 621 622 #endif /* _NFS_EXPORT_H */ 623